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gstreamer-rs/gir-files/Gst-1.0.gir
Marijn Suijten b273c4e8bf gir-files: Re-run fix.sh on freshly imported files 
Rerunning it on existing files doesn't perform all whitespace cleanup
when nodes are not modified.
2021-01-05 03:01:56 +01:00

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<?xml version="1.0"?>
<!-- This file was automatically generated from C sources - DO NOT EDIT!
To affect the contents of this file, edit the original C definitions,
and/or use gtk-doc annotations. -->
<repository xmlns="http://www.gtk.org/introspection/core/1.0" xmlns:c="http://www.gtk.org/introspection/c/1.0" xmlns:glib="http://www.gtk.org/introspection/glib/1.0" version="1.2">
<include name="GLib" version="2.0"/>
<include name="GModule" version="2.0"/>
<include name="GObject" version="2.0"/>
<package name="gstreamer-1.0"/>
<c:include name="gst/gst.h"/>
<namespace name="Gst" version="1.0" shared-library="libgstreamer-1.0.so.0" c:identifier-prefixes="Gst" c:symbol-prefixes="gst">
<alias name="ClockID" c:type="GstClockID">
<doc xml:space="preserve">A datatype to hold the handle to an outstanding sync or async clock callback.</doc>
<type name="gpointer" c:type="gpointer"/>
</alias>
<alias name="ClockTime" c:type="GstClockTime">
<doc xml:space="preserve">A datatype to hold a time, measured in nanoseconds.</doc>
<type name="guint64" c:type="guint64"/>
</alias>
<alias name="ClockTimeDiff" c:type="GstClockTimeDiff">
<doc xml:space="preserve">A datatype to hold a time difference, measured in nanoseconds.</doc>
<type name="gint64" c:type="gint64"/>
</alias>
<alias name="ElementFactoryListType" c:type="GstElementFactoryListType">
<doc xml:space="preserve">A type defining the type of an element factory.</doc>
<type name="guint64" c:type="guint64"/>
</alias>
<function-macro name="ALLOCATOR" c:identifier="GST_ALLOCATOR" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ALLOCATOR_CAST" c:identifier="GST_ALLOCATOR_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ALLOCATOR_CLASS" c:identifier="GST_ALLOCATOR_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="ALLOCATOR_GET_CLASS" c:identifier="GST_ALLOCATOR_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="ALLOCATOR_SYSMEM" value="SystemMemory" c:type="GST_ALLOCATOR_SYSMEM">
<doc xml:space="preserve">The allocator name for the default system memory allocator</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<record name="AllocationParams" c:type="GstAllocationParams" glib:type-name="GstAllocationParams" glib:get-type="gst_allocation_params_get_type" c:symbol-prefix="allocation_params">
<doc xml:space="preserve">Parameters to control the allocation of memory</doc>
<field name="flags" writable="1">
<doc xml:space="preserve">flags to control allocation</doc>
<type name="MemoryFlags" c:type="GstMemoryFlags"/>
</field>
<field name="align" writable="1">
<doc xml:space="preserve">the desired alignment of the memory</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="prefix" writable="1">
<doc xml:space="preserve">the desired prefix</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="padding" writable="1">
<doc xml:space="preserve">the desired padding</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<method name="copy" c:identifier="gst_allocation_params_copy">
<doc xml:space="preserve">Create a copy of @params.
Free-function: gst_allocation_params_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new ##GstAllocationParams, free with
gst_allocation_params_free().</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</return-value>
<parameters>
<instance-parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocationParams</doc>
<type name="AllocationParams" c:type="const GstAllocationParams*"/>
</instance-parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_allocation_params_free">
<doc xml:space="preserve">Free @params</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="params" transfer-ownership="full">
<doc xml:space="preserve">a #GstAllocationParams</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</instance-parameter>
</parameters>
</method>
<method name="init" c:identifier="gst_allocation_params_init">
<doc xml:space="preserve">Initialize @params to its default values</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="params" transfer-ownership="none">
<doc xml:space="preserve">a #GstAllocationParams</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</instance-parameter>
</parameters>
</method>
</record>
<class name="Allocator" c:symbol-prefix="allocator" c:type="GstAllocator" parent="Object" abstract="1" glib:type-name="GstAllocator" glib:get-type="gst_allocator_get_type" glib:type-struct="AllocatorClass">
<doc xml:space="preserve">Memory is usually created by allocators with a gst_allocator_alloc()
method call. When %NULL is used as the allocator, the default allocator will
be used.
New allocators can be registered with gst_allocator_register().
Allocators are identified by name and can be retrieved with
gst_allocator_find(). gst_allocator_set_default() can be used to change the
default allocator.
New memory can be created with gst_memory_new_wrapped() that wraps the memory
allocated elsewhere.</doc>
<function name="find" c:identifier="gst_allocator_find">
<doc xml:space="preserve">Find a previously registered allocator with @name. When @name is %NULL, the
default allocator will be returned.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstAllocator or %NULL when
the allocator with @name was not registered. Use gst_object_unref()
to release the allocator after usage.</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the allocator</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="register" c:identifier="gst_allocator_register">
<doc xml:space="preserve">Registers the memory @allocator with @name. This function takes ownership of
@allocator.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the allocator</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="allocator" transfer-ownership="full">
<doc xml:space="preserve">#GstAllocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
</parameters>
</function>
<virtual-method name="alloc" invoker="alloc">
<doc xml:space="preserve">Use @allocator to allocate a new memory block with memory that is at least
@size big.
The optional @params can specify the prefix and padding for the memory. If
%NULL is passed, no flags, no extra prefix/padding and a default alignment is
used.
The prefix/padding will be filled with 0 if flags contains
#GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED respectively.
When @allocator is %NULL, the default allocator will be used.
The alignment in @params is given as a bitmask so that @align + 1 equals
the amount of bytes to align to. For example, to align to 8 bytes,
use an alignment of 7.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</instance-parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size of the visible memory area</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">optional parameters</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="free" invoker="free">
<doc xml:space="preserve">Free @memory that was previously allocated with gst_allocator_alloc().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="allocator" transfer-ownership="none">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</instance-parameter>
<parameter name="memory" transfer-ownership="full">
<doc xml:space="preserve">the memory to free</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</virtual-method>
<method name="alloc" c:identifier="gst_allocator_alloc">
<doc xml:space="preserve">Use @allocator to allocate a new memory block with memory that is at least
@size big.
The optional @params can specify the prefix and padding for the memory. If
%NULL is passed, no flags, no extra prefix/padding and a default alignment is
used.
The prefix/padding will be filled with 0 if flags contains
#GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED respectively.
When @allocator is %NULL, the default allocator will be used.
The alignment in @params is given as a bitmask so that @align + 1 equals
the amount of bytes to align to. For example, to align to 8 bytes,
use an alignment of 7.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</instance-parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size of the visible memory area</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">optional parameters</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_allocator_free">
<doc xml:space="preserve">Free @memory that was previously allocated with gst_allocator_alloc().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="allocator" transfer-ownership="none">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</instance-parameter>
<parameter name="memory" transfer-ownership="full">
<doc xml:space="preserve">the memory to free</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="set_default" c:identifier="gst_allocator_set_default">
<doc xml:space="preserve">Set the default allocator. This function takes ownership of @allocator.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="allocator" transfer-ownership="full">
<doc xml:space="preserve">a #GstAllocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</instance-parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="mem_type">
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="mem_map">
<doc xml:space="preserve">the implementation of the GstMemoryMapFunction</doc>
<type name="MemoryMapFunction" c:type="GstMemoryMapFunction"/>
</field>
<field name="mem_unmap">
<doc xml:space="preserve">the implementation of the GstMemoryUnmapFunction</doc>
<type name="MemoryUnmapFunction" c:type="GstMemoryUnmapFunction"/>
</field>
<field name="mem_copy">
<doc xml:space="preserve">the implementation of the GstMemoryCopyFunction</doc>
<type name="MemoryCopyFunction" c:type="GstMemoryCopyFunction"/>
</field>
<field name="mem_share">
<doc xml:space="preserve">the implementation of the GstMemoryShareFunction</doc>
<type name="MemoryShareFunction" c:type="GstMemoryShareFunction"/>
</field>
<field name="mem_is_span">
<doc xml:space="preserve">the implementation of the GstMemoryIsSpanFunction</doc>
<type name="MemoryIsSpanFunction" c:type="GstMemoryIsSpanFunction"/>
</field>
<field name="mem_map_full">
<doc xml:space="preserve">the implementation of the GstMemoryMapFullFunction.
Will be used instead of @mem_map if present. (Since: 1.6)</doc>
<type name="MemoryMapFullFunction" c:type="GstMemoryMapFullFunction"/>
</field>
<field name="mem_unmap_full">
<doc xml:space="preserve">the implementation of the GstMemoryUnmapFullFunction.
Will be used instead of @mem_unmap if present. (Since: 1.6)</doc>
<type name="MemoryUnmapFullFunction" c:type="GstMemoryUnmapFullFunction"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="2">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<field name="priv" readable="0" private="1">
<type name="AllocatorPrivate" c:type="GstAllocatorPrivate*"/>
</field>
</class>
<record name="AllocatorClass" c:type="GstAllocatorClass" glib:is-gtype-struct-for="Allocator">
<doc xml:space="preserve">The #GstAllocator is used to create new memory.</doc>
<field name="object_class">
<doc xml:space="preserve">Object parent class</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="alloc">
<callback name="alloc">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size of the visible memory area</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">optional parameters</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="free">
<callback name="free">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="allocator" transfer-ownership="none">
<doc xml:space="preserve">a #GstAllocator to use</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="memory" transfer-ownership="full">
<doc xml:space="preserve">the memory to free</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="AllocatorFlags" glib:type-name="GstAllocatorFlags" glib:get-type="gst_allocator_flags_get_type" c:type="GstAllocatorFlags">
<doc xml:space="preserve">Flags for allocators.</doc>
<member name="custom_alloc" value="16" c:identifier="GST_ALLOCATOR_FLAG_CUSTOM_ALLOC" glib:nick="custom-alloc">
<doc xml:space="preserve">The allocator has a custom alloc function.</doc>
</member>
<member name="last" value="1048576" c:identifier="GST_ALLOCATOR_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">first flag that can be used for custom purposes</doc>
</member>
</bitfield>
<record name="AllocatorPrivate" c:type="GstAllocatorPrivate" disguised="1"/>
<record name="AtomicQueue" c:type="GstAtomicQueue" glib:type-name="GstAtomicQueue" glib:get-type="gst_atomic_queue_get_type" c:symbol-prefix="atomic_queue">
<doc xml:space="preserve">The #GstAtomicQueue object implements a queue that can be used from multiple
threads without performing any blocking operations.</doc>
<constructor name="new" c:identifier="gst_atomic_queue_new">
<doc xml:space="preserve">Create a new atomic queue instance. @initial_size will be rounded up to the
nearest power of 2 and used as the initial size of the queue.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</return-value>
<parameters>
<parameter name="initial_size" transfer-ownership="none">
<doc xml:space="preserve">initial queue size</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</constructor>
<method name="length" c:identifier="gst_atomic_queue_length">
<doc xml:space="preserve">Get the amount of items in the queue.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of elements in the queue.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
</parameters>
</method>
<method name="peek" c:identifier="gst_atomic_queue_peek">
<doc xml:space="preserve">Peek the head element of the queue without removing it from the queue.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the head element of @queue or
%NULL when the queue is empty.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
</parameters>
</method>
<method name="pop" c:identifier="gst_atomic_queue_pop">
<doc xml:space="preserve">Get the head element of the queue.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the head element of @queue or %NULL when
the queue is empty.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
</parameters>
</method>
<method name="push" c:identifier="gst_atomic_queue_push">
<doc xml:space="preserve">Append @data to the tail of the queue.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_atomic_queue_ref">
<doc xml:space="preserve">Increase the refcount of @queue.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_atomic_queue_unref">
<doc xml:space="preserve">Unref @queue and free the memory when the refcount reaches 0.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="queue" transfer-ownership="none">
<doc xml:space="preserve">a #GstAtomicQueue</doc>
<type name="AtomicQueue" c:type="GstAtomicQueue*"/>
</instance-parameter>
</parameters>
</method>
</record>
<function-macro name="BIN" c:identifier="GST_BIN" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_CAST" c:identifier="GST_BIN_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_CHILDREN" c:identifier="GST_BIN_CHILDREN" introspectable="0">
<doc xml:space="preserve">Gets the list with children in a bin.</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">a #GstBin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_CHILDREN_COOKIE" c:identifier="GST_BIN_CHILDREN_COOKIE" introspectable="0">
<doc xml:space="preserve">Gets the children cookie that watches the children list.</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">a #GstBin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_CLASS" c:identifier="GST_BIN_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_GET_CLASS" c:identifier="GST_BIN_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_IS_NO_RESYNC" c:identifier="GST_BIN_IS_NO_RESYNC" version="1.0.5" introspectable="0">
<doc xml:space="preserve">Check if @bin will resync its state change when elements are added and
removed.</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">A #GstBin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BIN_NUMCHILDREN" c:identifier="GST_BIN_NUMCHILDREN" introspectable="0">
<doc xml:space="preserve">Gets the number of children in a bin.</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">a #GstBin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER" c:identifier="GST_BUFFER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_CAST" c:identifier="GST_BUFFER_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="BUFFER_COPY_ALL" value="15" c:type="GST_BUFFER_COPY_ALL">
<doc xml:space="preserve">Combination of all possible fields that can be copied with
gst_buffer_copy_into().</doc>
<type name="BufferCopyFlags" c:type="GstBufferCopyFlags"/>
</constant>
<constant name="BUFFER_COPY_METADATA" value="7" c:type="GST_BUFFER_COPY_METADATA">
<doc xml:space="preserve">Combination of all possible metadata fields that can be copied with
gst_buffer_copy_into().</doc>
<type name="BufferCopyFlags" c:type="GstBufferCopyFlags"/>
</constant>
<function-macro name="BUFFER_DTS" c:identifier="GST_BUFFER_DTS" introspectable="0">
<doc xml:space="preserve">The decoding timestamp (dts) in nanoseconds (as a #GstClockTime)
of the data in the buffer. This is the timestamp when the media should be
decoded or processed otherwise.
Value will be %GST_CLOCK_TIME_NONE if the dts is unknown.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.:</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_DTS_IS_VALID" c:identifier="GST_BUFFER_DTS_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the dts is known.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_DTS_OR_PTS" c:identifier="GST_BUFFER_DTS_OR_PTS" version="1.8" introspectable="0">
<doc xml:space="preserve">Returns the buffer decoding timestamp (dts) if valid, else the buffer
presentation time (pts)</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.:</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_DURATION" c:identifier="GST_BUFFER_DURATION" introspectable="0">
<doc xml:space="preserve">The duration in nanoseconds (as a #GstClockTime) of the data in the buffer.
Value will be %GST_CLOCK_TIME_NONE if the duration is unknown.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_DURATION_IS_VALID" c:identifier="GST_BUFFER_DURATION_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the duration is known.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_FLAGS" c:identifier="GST_BUFFER_FLAGS" introspectable="0">
<doc xml:space="preserve">A flags word containing #GstBufferFlags flags set on this buffer.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_FLAG_IS_SET" c:identifier="GST_BUFFER_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">Gives the status of a specific flag on a buffer.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstBufferFlags flag to check.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_FLAG_SET" c:identifier="GST_BUFFER_FLAG_SET" introspectable="0">
<doc xml:space="preserve">Sets a buffer flag on a buffer.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstBufferFlags flag to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_FLAG_UNSET" c:identifier="GST_BUFFER_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">Clears a buffer flag.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstBufferFlags flag to clear.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_IS_DISCONT" c:identifier="GST_BUFFER_IS_DISCONT" introspectable="0">
<doc xml:space="preserve">Tests if the buffer marks a discontinuity in the stream.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_LIST" c:identifier="GST_BUFFER_LIST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_LIST_CAST" c:identifier="GST_BUFFER_LIST_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_OFFSET" c:identifier="GST_BUFFER_OFFSET" introspectable="0">
<doc xml:space="preserve">The offset in the source file of the beginning of this buffer.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_OFFSET_END" c:identifier="GST_BUFFER_OFFSET_END" introspectable="0">
<doc xml:space="preserve">The offset in the source file of the end of this buffer.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_OFFSET_END_IS_VALID" c:identifier="GST_BUFFER_OFFSET_END_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the end offset is known.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_OFFSET_IS_VALID" c:identifier="GST_BUFFER_OFFSET_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the start offset is known.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<constant name="BUFFER_OFFSET_NONE" value="18446744073709551615" c:type="GST_BUFFER_OFFSET_NONE">
<doc xml:space="preserve">Constant for no-offset return results.</doc>
<type name="guint64" c:type="guint64"/>
</constant>
<function-macro name="BUFFER_POOL" c:identifier="GST_BUFFER_POOL" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_POOL_CAST" c:identifier="GST_BUFFER_POOL_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_POOL_CLASS" c:identifier="GST_BUFFER_POOL_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_POOL_GET_CLASS" c:identifier="GST_BUFFER_POOL_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_POOL_IS_FLUSHING" c:identifier="GST_BUFFER_POOL_IS_FLUSHING" introspectable="0">
<doc xml:space="preserve">Check if the bufferpool is flushing. Subclasses might want to check the
state of the pool in the acquire function.</doc>
<parameters>
<parameter name="pool">
<doc xml:space="preserve">a GstBufferPool</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_PTS" c:identifier="GST_BUFFER_PTS" introspectable="0">
<doc xml:space="preserve">The presentation timestamp (pts) in nanoseconds (as a #GstClockTime)
of the data in the buffer. This is the timestamp when the media should be
presented to the user.
Value will be %GST_CLOCK_TIME_NONE if the pts is unknown.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer.:</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUFFER_PTS_IS_VALID" c:identifier="GST_BUFFER_PTS_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the pts is known.</doc>
<parameters>
<parameter name="buffer">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="BUS" c:identifier="GST_BUS" introspectable="0">
<parameters>
<parameter name="bus">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUS_CAST" c:identifier="GST_BUS_CAST" introspectable="0">
<parameters>
<parameter name="bus">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUS_CLASS" c:identifier="GST_BUS_CLASS" introspectable="0">
<parameters>
<parameter name="bclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="BUS_GET_CLASS" c:identifier="GST_BUS_GET_CLASS" introspectable="0">
<parameters>
<parameter name="bus">
</parameter>
</parameters>
</function-macro>
<class name="Bin" c:symbol-prefix="bin" c:type="GstBin" parent="Element" glib:type-name="GstBin" glib:get-type="gst_bin_get_type" glib:type-struct="BinClass">
<doc xml:space="preserve">#GstBin is an element that can contain other #GstElement, allowing them to be
managed as a group.
Pads from the child elements can be ghosted to the bin, see #GstGhostPad.
This makes the bin look like any other elements and enables creation of
higher-level abstraction elements.
A new #GstBin is created with gst_bin_new(). Use a #GstPipeline instead if you
want to create a toplevel bin because a normal bin doesn't have a bus or
handle clock distribution of its own.
After the bin has been created you will typically add elements to it with
gst_bin_add(). You can remove elements with gst_bin_remove().
An element can be retrieved from a bin with gst_bin_get_by_name(), using the
elements name. gst_bin_get_by_name_recurse_up() is mainly used for internal
purposes and will query the parent bins when the element is not found in the
current bin.
An iterator of elements in a bin can be retrieved with
gst_bin_iterate_elements(). Various other iterators exist to retrieve the
elements in a bin.
gst_object_unref() is used to drop your reference to the bin.
The #GstBin::element-added signal is fired whenever a new element is added to
the bin. Likewise the #GstBin::element-removed signal is fired whenever an
element is removed from the bin.
## Notes
A #GstBin internally intercepts every #GstMessage posted by its children and
implements the following default behaviour for each of them:
* GST_MESSAGE_EOS: This message is only posted by sinks in the PLAYING
state. If all sinks posted the EOS message, this bin will post and EOS
message upwards.
* GST_MESSAGE_SEGMENT_START: Just collected and never forwarded upwards.
The messages are used to decide when all elements have completed playback
of their segment.
* GST_MESSAGE_SEGMENT_DONE: Is posted by #GstBin when all elements that posted
a SEGMENT_START have posted a SEGMENT_DONE.
* GST_MESSAGE_DURATION_CHANGED: Is posted by an element that detected a change
in the stream duration. The duration change is posted to the
application so that it can refetch the new duration with a duration
query. Note that these messages can be posted before the bin is
prerolled, in which case the duration query might fail. Note also that
there might be a discrepancy (due to internal buffering/queueing) between the
stream being currently displayed and the returned duration query.
Applications might want to also query for duration (and changes) by
listening to the GST_MESSAGE_STREAM_START message, signaling the active start
of a (new) stream.
* GST_MESSAGE_CLOCK_LOST: This message is posted by an element when it
can no longer provide a clock. The default bin behaviour is to
check if the lost clock was the one provided by the bin. If so and
the bin is currently in the PLAYING state, the message is forwarded to
the bin parent.
This message is also generated when a clock provider is removed from
the bin. If this message is received by the application, it should
PAUSE the pipeline and set it back to PLAYING to force a new clock
distribution.
* GST_MESSAGE_CLOCK_PROVIDE: This message is generated when an element
can provide a clock. This mostly happens when a new clock
provider is added to the bin. The default behaviour of the bin is to
mark the currently selected clock as dirty, which will perform a clock
recalculation the next time the bin is asked to provide a clock.
This message is never sent tot the application but is forwarded to
the parent of the bin.
* OTHERS: posted upwards.
A #GstBin implements the following default behaviour for answering to a
#GstQuery:
* GST_QUERY_DURATION: The bin will forward the query to all sink
elements contained within and will return the maximum value.
If no sinks are available in the bin, the query fails.
* GST_QUERY_POSITION:The query is sent to all sink elements in the bin and the
MAXIMUM of all values is returned. If no sinks are available in the bin,
the query fails.
* OTHERS:the query is forwarded to all sink elements, the result
of the first sink that answers the query successfully is returned. If no
sink is in the bin, the query fails.
A #GstBin will by default forward any event sent to it to all sink
(#GST_EVENT_TYPE_DOWNSTREAM) or source (#GST_EVENT_TYPE_UPSTREAM) elements
depending on the event type.
If all the elements return %TRUE, the bin will also return %TRUE, else %FALSE
is returned. If no elements of the required type are in the bin, the event
handler will return %TRUE.</doc>
<implements name="ChildProxy"/>
<constructor name="new" c:identifier="gst_bin_new">
<doc xml:space="preserve">Creates a new bin with the given name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new #GstBin</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new bin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<virtual-method name="add_element">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="deep_element_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="sub_bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="deep_element_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="sub_bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="do_latency">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="element_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="element_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="handle_message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="remove_element">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<method name="add" c:identifier="gst_bin_add">
<doc xml:space="preserve">Adds the given element to the bin. Sets the element's parent, and thus
takes ownership of the element. An element can only be added to one bin.
If the element's pads are linked to other pads, the pads will be unlinked
before the element is added to the bin.
&gt; When you add an element to an already-running pipeline, you will have to
&gt; take care to set the state of the newly-added element to the desired
&gt; state (usually PLAYING or PAUSED, same you set the pipeline to originally)
&gt; with gst_element_set_state(), or use gst_element_sync_state_with_parent().
&gt; The bin or pipeline will not take care of this for you.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element could be added, %FALSE if
the bin does not want to accept the element.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement to add</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</method>
<method name="add_many" c:identifier="gst_bin_add_many" introspectable="0">
<doc xml:space="preserve">Adds a %NULL-terminated list of elements to a bin. This function is
equivalent to calling gst_bin_add() for each member of the list. The return
value of each gst_bin_add() is ignored.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element_1" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement element to add to the bin</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional elements to add to the bin</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="find_unlinked_pad" c:identifier="gst_bin_find_unlinked_pad">
<doc xml:space="preserve">Recursively looks for elements with an unlinked pad of the given
direction within the specified bin and returns an unlinked pad
if one is found, or %NULL otherwise. If a pad is found, the caller
owns a reference to it and should use gst_object_unref() on the
pad when it is not needed any longer.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">unlinked pad of the given
direction, %NULL.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">bin in which to look for elements with unlinked pads</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="direction" transfer-ownership="none">
<doc xml:space="preserve">whether to look for an unlinked source or sink pad</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
</parameters>
</method>
<method name="get_by_interface" c:identifier="gst_bin_get_by_interface">
<doc xml:space="preserve">Looks for an element inside the bin that implements the given
interface. If such an element is found, it returns the element.
You can cast this element to the given interface afterwards. If you want
all elements that implement the interface, use
gst_bin_iterate_all_by_interface(). This function recurses into child bins.
MT safe. Caller owns returned reference.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A #GstElement inside the bin
implementing the interface</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="iface" transfer-ownership="none">
<doc xml:space="preserve">the #GType of an interface</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="get_by_name" c:identifier="gst_bin_get_by_name">
<doc xml:space="preserve">Gets the element with the given name from a bin. This
function recurses into child bins.
Returns %NULL if no element with the given name is found in the bin.
MT safe. Caller owns returned reference.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstElement with the given
name, or %NULL</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the element name to search for</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_by_name_recurse_up" c:identifier="gst_bin_get_by_name_recurse_up">
<doc xml:space="preserve">Gets the element with the given name from this bin. If the
element is not found, a recursion is performed on the parent bin.
Returns %NULL if:
- no element with the given name is found in the bin
MT safe. Caller owns returned reference.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstElement with the given
name, or %NULL</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the element name to search for</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_suppressed_flags" c:identifier="gst_bin_get_suppressed_flags" version="1.10">
<doc xml:space="preserve">Return the suppressed flags of the bin.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the bin's suppressed #GstElementFlags.</doc>
<type name="ElementFlags" c:type="GstElementFlags"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_all_by_element_factory_name" c:identifier="gst_bin_iterate_all_by_element_factory_name" version="1.18">
<doc xml:space="preserve">Looks for all elements inside the bin with the given element factory name.
The function recurses inside child bins. The iterator will yield a series of
#GstElement that should be unreffed after use.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement
for all elements in the bin with the given element factory name,
or %NULL.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="factory_name" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstElementFactory</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="iterate_all_by_interface" c:identifier="gst_bin_iterate_all_by_interface">
<doc xml:space="preserve">Looks for all elements inside the bin that implements the given
interface. You can safely cast all returned elements to the given interface.
The function recurses inside child bins. The iterator will yield a series
of #GstElement that should be unreffed after use.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement
for all elements in the bin implementing the given interface,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="iface" transfer-ownership="none">
<doc xml:space="preserve">the #GType of an interface</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="iterate_elements" c:identifier="gst_bin_iterate_elements">
<doc xml:space="preserve">Gets an iterator for the elements in this bin.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_recurse" c:identifier="gst_bin_iterate_recurse">
<doc xml:space="preserve">Gets an iterator for the elements in this bin.
This iterator recurses into GstBin children.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_sinks" c:identifier="gst_bin_iterate_sinks">
<doc xml:space="preserve">Gets an iterator for all elements in the bin that have the
#GST_ELEMENT_FLAG_SINK flag set.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_sorted" c:identifier="gst_bin_iterate_sorted">
<doc xml:space="preserve">Gets an iterator for the elements in this bin in topologically
sorted order. This means that the elements are returned from
the most downstream elements (sinks) to the sources.
This function is used internally to perform the state changes
of the bin elements and for clock selection.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_sources" c:identifier="gst_bin_iterate_sources">
<doc xml:space="preserve">Gets an iterator for all elements in the bin that have the
#GST_ELEMENT_FLAG_SOURCE flag set.
MT safe. Caller owns returned value.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstElement,
or %NULL</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="recalculate_latency" c:identifier="gst_bin_recalculate_latency">
<doc xml:space="preserve">Query @bin for the current latency using and reconfigures this latency to all the
elements with a LATENCY event.
This method is typically called on the pipeline when a #GST_MESSAGE_LATENCY
is posted on the bus.
This function simply emits the 'do-latency' signal so any custom latency
calculations will be performed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the latency could be queried and reconfigured.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove" c:identifier="gst_bin_remove">
<doc xml:space="preserve">Removes the element from the bin, unparenting it as well.
Unparenting the element means that the element will be dereferenced,
so if the bin holds the only reference to the element, the element
will be freed in the process of removing it from the bin. If you
want the element to still exist after removing, you need to call
gst_object_ref() before removing it from the bin.
If the element's pads are linked to other pads, the pads will be unlinked
before the element is removed from the bin.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element could be removed, %FALSE if
the bin does not want to remove the element.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement to remove</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</method>
<method name="remove_many" c:identifier="gst_bin_remove_many" introspectable="0">
<doc xml:space="preserve">Remove a list of elements from a bin. This function is equivalent
to calling gst_bin_remove() with each member of the list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="element_1" transfer-ownership="none">
<doc xml:space="preserve">the first #GstElement to remove from the bin</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">%NULL-terminated list of elements to remove from the bin</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="set_suppressed_flags" c:identifier="gst_bin_set_suppressed_flags" version="1.10">
<doc xml:space="preserve">Suppress the given flags on the bin. #GstElementFlags of a
child element are propagated when it is added to the bin.
When suppressed flags are set, those specified flags will
not be propagated to the bin.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstElementFlags to suppress</doc>
<type name="ElementFlags" c:type="GstElementFlags"/>
</parameter>
</parameters>
</method>
<method name="sync_children_states" c:identifier="gst_bin_sync_children_states" version="1.6">
<doc xml:space="preserve">Synchronizes the state of every child of @bin with the state
of @bin. See also gst_element_sync_state_with_parent().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if syncing the state was successful for all children,
otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">a #GstBin</doc>
<type name="Bin" c:type="GstBin*"/>
</instance-parameter>
</parameters>
</method>
<property name="async-handling" writable="1" transfer-ownership="none">
<doc xml:space="preserve">If set to %TRUE, the bin will handle asynchronous state changes.
This should be used only if the bin subclass is modifying the state
of its children on its own.</doc>
<type name="gboolean" c:type="gboolean"/>
</property>
<property name="message-forward" writable="1" transfer-ownership="none">
<doc xml:space="preserve">Forward all children messages, even those that would normally be filtered by
the bin. This can be interesting when one wants to be notified of the EOS
state of individual elements, for example.
The messages are converted to an ELEMENT message with the bin as the
source. The structure of the message is named 'GstBinForwarded' and contains
a field named 'message' of type GST_TYPE_MESSAGE that contains the original
forwarded message.</doc>
<type name="gboolean" c:type="gboolean"/>
</property>
<field name="element">
<type name="Element" c:type="GstElement"/>
</field>
<field name="numchildren">
<doc xml:space="preserve">the number of children in this bin</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="children">
<doc xml:space="preserve">the list of children in this bin</doc>
<type name="GLib.List" c:type="GList*">
<type name="Element"/>
</type>
</field>
<field name="children_cookie">
<doc xml:space="preserve">updated whenever @children changes</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="child_bus">
<doc xml:space="preserve">internal bus for handling child messages</doc>
<type name="Bus" c:type="GstBus*"/>
</field>
<field name="messages">
<doc xml:space="preserve">queued and cached messages</doc>
<type name="GLib.List" c:type="GList*">
<type name="Message"/>
</type>
</field>
<field name="polling">
<doc xml:space="preserve">the bin is currently calculating its state</doc>
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="state_dirty">
<doc xml:space="preserve">the bin needs to recalculate its state (deprecated)</doc>
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="clock_dirty">
<doc xml:space="preserve">the bin needs to select a new clock</doc>
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="provided_clock">
<doc xml:space="preserve">the last clock selected</doc>
<type name="Clock" c:type="GstClock*"/>
</field>
<field name="clock_provider">
<doc xml:space="preserve">the element that provided @provided_clock</doc>
<type name="Element" c:type="GstElement*"/>
</field>
<field name="priv" readable="0" private="1">
<type name="BinPrivate" c:type="GstBinPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="deep-element-added" when="first" version="1.10">
<doc xml:space="preserve">Will be emitted after the element was added to sub_bin.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="sub_bin" transfer-ownership="none">
<doc xml:space="preserve">the #GstBin the element was added to</doc>
<type name="Bin"/>
</parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement that was added to @sub_bin</doc>
<type name="Element"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="deep-element-removed" when="first" version="1.10">
<doc xml:space="preserve">Will be emitted after the element was removed from sub_bin.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="sub_bin" transfer-ownership="none">
<doc xml:space="preserve">the #GstBin the element was removed from</doc>
<type name="Bin"/>
</parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement that was removed from @sub_bin</doc>
<type name="Element"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="do-latency" when="last">
<doc xml:space="preserve">Will be emitted when the bin needs to perform latency calculations. This
signal is only emitted for toplevel bins or when async-handling is
enabled.
Only one signal handler is invoked. If no signals are connected, the
default handler is invoked, which will query and distribute the lowest
possible latency to all sinks.
Connect to this signal if the default latency calculations are not
sufficient, like when you need different latencies for different sinks in
the same pipeline.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
</glib:signal>
<glib:signal name="element-added" when="first">
<doc xml:space="preserve">Will be emitted after the element was added to the bin.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement that was added to the bin</doc>
<type name="Element"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="element-removed" when="first">
<doc xml:space="preserve">Will be emitted after the element was removed from the bin.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement that was removed from the bin</doc>
<type name="Element"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="BinClass" c:type="GstBinClass" glib:is-gtype-struct-for="Bin">
<doc xml:space="preserve">Subclasses can override the @add_element and @remove_element to
update the list of children in the bin.
The @handle_message method can be overridden to implement custom
message handling. @handle_message takes ownership of the message, just like
#gst_element_post_message.
The @deep_element_added vfunc will be called when a new element has been
added to any bin inside this bin, so it will also be called if a new child
was added to a sub-bin of this bin. #GstBin implementations that override
this message should chain up to the parent class implementation so the
#GstBin::deep-element-added signal is emitted on all parents.</doc>
<field name="parent_class">
<doc xml:space="preserve">bin parent class</doc>
<type name="ElementClass" c:type="GstElementClass"/>
</field>
<field name="pool" readable="0" private="1">
<type name="GLib.ThreadPool" c:type="GThreadPool*"/>
</field>
<field name="element_added">
<callback name="element_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="element_removed">
<callback name="element_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="add_element">
<callback name="add_element">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="remove_element">
<callback name="remove_element">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="handle_message">
<callback name="handle_message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="do_latency">
<callback name="do_latency">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="deep_element_added">
<callback name="deep_element_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="sub_bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="deep_element_removed">
<callback name="deep_element_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="sub_bin" transfer-ownership="none">
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="2">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="BinFlags" glib:type-name="GstBinFlags" glib:get-type="gst_bin_flags_get_type" c:type="GstBinFlags">
<doc xml:space="preserve">GstBinFlags are a set of flags specific to bins. Most are set/used
internally. They can be checked using the GST_OBJECT_FLAG_IS_SET () macro,
and (un)set using GST_OBJECT_FLAG_SET () and GST_OBJECT_FLAG_UNSET ().</doc>
<member name="no_resync" value="16384" c:identifier="GST_BIN_FLAG_NO_RESYNC" glib:nick="no-resync">
<doc xml:space="preserve">don't resync a state change when elements are
added or linked in the bin (Since: 1.0.5)</doc>
</member>
<member name="streams_aware" value="32768" c:identifier="GST_BIN_FLAG_STREAMS_AWARE" glib:nick="streams-aware">
<doc xml:space="preserve">Indicates whether the bin can handle elements
that add/remove source pads at any point in time without
first posting a no-more-pads signal (Since: 1.10)</doc>
</member>
<member name="last" value="524288" c:identifier="GST_BIN_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">the last enum in the series of flags for bins.
Derived classes can use this as first value in a list of flags.</doc>
</member>
</bitfield>
<record name="BinPrivate" c:type="GstBinPrivate" disguised="1"/>
<class name="Bitmask" c:symbol-prefix="bitmask" glib:type-name="GstBitmask" glib:get-type="gst_bitmask_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a 64-bit bitmask</doc>
</class>
<record name="Buffer" c:type="GstBuffer" glib:type-name="GstBuffer" glib:get-type="gst_buffer_get_type" c:symbol-prefix="buffer">
<doc xml:space="preserve">Buffers are the basic unit of data transfer in GStreamer. They contain the
timing and offset along with other arbitrary metadata that is associated
with the #GstMemory blocks that the buffer contains.
Buffers are usually created with gst_buffer_new(). After a buffer has been
created one will typically allocate memory for it and add it to the buffer.
The following example creates a buffer that can hold a given video frame
with a given width, height and bits per plane.
|[&lt;!-- language="C" --&gt;
GstBuffer *buffer;
GstMemory *memory;
gint size, width, height, bpp;
...
size = width * height * bpp;
buffer = gst_buffer_new ();
memory = gst_allocator_alloc (NULL, size, NULL);
gst_buffer_insert_memory (buffer, -1, memory);
...
]|
Alternatively, use gst_buffer_new_allocate() to create a buffer with
preallocated data of a given size.
Buffers can contain a list of #GstMemory objects. You can retrieve how many
memory objects with gst_buffer_n_memory() and you can get a pointer
to memory with gst_buffer_peek_memory()
A buffer will usually have timestamps, and a duration, but neither of these
are guaranteed (they may be set to #GST_CLOCK_TIME_NONE). Whenever a
meaningful value can be given for these, they should be set. The timestamps
and duration are measured in nanoseconds (they are #GstClockTime values).
The buffer DTS refers to the timestamp when the buffer should be decoded and
is usually monotonically increasing. The buffer PTS refers to the timestamp when
the buffer content should be presented to the user and is not always
monotonically increasing.
A buffer can also have one or both of a start and an end offset. These are
media-type specific. For video buffers, the start offset will generally be
the frame number. For audio buffers, it will be the number of samples
produced so far. For compressed data, it could be the byte offset in a
source or destination file. Likewise, the end offset will be the offset of
the end of the buffer. These can only be meaningfully interpreted if you
know the media type of the buffer (the preceding CAPS event). Either or both
can be set to #GST_BUFFER_OFFSET_NONE.
gst_buffer_ref() is used to increase the refcount of a buffer. This must be
done when you want to keep a handle to the buffer after pushing it to the
next element. The buffer refcount determines the writability of the buffer, a
buffer is only writable when the refcount is exactly 1, i.e. when the caller
has the only reference to the buffer.
To efficiently create a smaller buffer out of an existing one, you can
use gst_buffer_copy_region(). This method tries to share the memory objects
between the two buffers.
If a plug-in wants to modify the buffer data or metadata in-place, it should
first obtain a buffer that is safe to modify by using
gst_buffer_make_writable(). This function is optimized so that a copy will
only be made when it is necessary.
Several flags of the buffer can be set and unset with the
GST_BUFFER_FLAG_SET() and GST_BUFFER_FLAG_UNSET() macros. Use
GST_BUFFER_FLAG_IS_SET() to test if a certain #GstBufferFlags flag is set.
Buffers can be efficiently merged into a larger buffer with
gst_buffer_append(). Copying of memory will only be done when absolutely
needed.
Arbitrary extra metadata can be set on a buffer with gst_buffer_add_meta().
Metadata can be retrieved with gst_buffer_get_meta(). See also #GstMeta
An element should either unref the buffer or push it out on a src pad
using gst_pad_push() (see #GstPad).
Buffers are usually freed by unreffing them with gst_buffer_unref(). When
the refcount drops to 0, any memory and metadata pointed to by the buffer is
unreffed as well. Buffers allocated from a #GstBufferPool will be returned to
the pool when the refcount drops to 0.
The #GstParentBufferMeta is a meta which can be attached to a #GstBuffer
to hold a reference to another buffer that is only released when the child
#GstBuffer is released.
Typically, #GstParentBufferMeta is used when the child buffer is directly
using the #GstMemory of the parent buffer, and wants to prevent the parent
buffer from being returned to a buffer pool until the #GstMemory is available
for re-use. (Since: 1.6)</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">the parent structure</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<field name="pool" writable="1">
<doc xml:space="preserve">pointer to the pool owner of the buffer</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</field>
<field name="pts" writable="1">
<doc xml:space="preserve">presentation timestamp of the buffer, can be #GST_CLOCK_TIME_NONE when the
pts is not known or relevant. The pts contains the timestamp when the
media should be presented to the user.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="dts" writable="1">
<doc xml:space="preserve">decoding timestamp of the buffer, can be #GST_CLOCK_TIME_NONE when the
dts is not known or relevant. The dts contains the timestamp when the
media should be processed.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="duration" writable="1">
<doc xml:space="preserve">duration in time of the buffer data, can be #GST_CLOCK_TIME_NONE
when the duration is not known or relevant.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="offset" writable="1">
<doc xml:space="preserve">a media specific offset for the buffer data.
For video frames, this is the frame number of this buffer.
For audio samples, this is the offset of the first sample in this buffer.
For file data or compressed data this is the byte offset of the first
byte in this buffer.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="offset_end" writable="1">
<doc xml:space="preserve">the last offset contained in this buffer. It has the same
format as @offset.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<constructor name="new" c:identifier="gst_buffer_new">
<doc xml:space="preserve">Creates a newly allocated buffer without any data.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
</constructor>
<constructor name="new_allocate" c:identifier="gst_buffer_new_allocate">
<doc xml:space="preserve">Tries to create a newly allocated buffer with data of the given size and
extra parameters from @allocator. If the requested amount of memory can't be
allocated, %NULL will be returned. The allocated buffer memory is not cleared.
When @allocator is %NULL, the default memory allocator will be used.
Note that when @size == 0, the buffer will not have memory associated with it.
MT safe.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstBuffer, or %NULL if
the memory couldn't be allocated.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstAllocator to use, or %NULL to use the
default allocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size in bytes of the new buffer's data.</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">optional parameters</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_wrapped" c:identifier="gst_buffer_new_wrapped">
<doc xml:space="preserve">Creates a new buffer that wraps the given @data. The memory will be freed
with g_free and will be marked writable.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<parameter name="data" transfer-ownership="full">
<doc xml:space="preserve">data to wrap</doc>
<array length="1" zero-terminated="0" c:type="gpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">allocated size of @data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_wrapped_bytes" c:identifier="gst_buffer_new_wrapped_bytes" version="1.16">
<doc xml:space="preserve">Creates a new #GstBuffer that wraps the given @bytes. The data inside
@bytes cannot be %NULL and the resulting buffer will be marked as read only.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstBuffer wrapping @bytes</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<parameter name="bytes" transfer-ownership="none">
<doc xml:space="preserve">a #GBytes to wrap</doc>
<type name="GLib.Bytes" c:type="GBytes*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_wrapped_full" c:identifier="gst_buffer_new_wrapped_full">
<doc xml:space="preserve">Allocate a new buffer that wraps the given memory. @data must point to
@maxsize of memory, the wrapped buffer will have the region from @offset and
@size visible.
When the buffer is destroyed, @notify will be called with @user_data.
The prefix/padding must be filled with 0 if @flags contains
#GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED respectively.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstMemoryFlags</doc>
<type name="MemoryFlags" c:type="GstMemoryFlags"/>
</parameter>
<parameter name="data" transfer-ownership="none">
<doc xml:space="preserve">data to wrap</doc>
<array length="4" zero-terminated="0" c:type="gpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">allocated size of @data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">offset in @data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size of valid data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" nullable="1" allow-none="1" scope="async" closure="5">
<doc xml:space="preserve">called with @user_data when the memory is freed</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</constructor>
<method name="add_meta" c:identifier="gst_buffer_add_meta">
<doc xml:space="preserve">Add metadata for @info to @buffer using the parameters in @params.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the metadata for the api in @info on @buffer.</doc>
<type name="Meta" c:type="GstMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">params for @info</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="add_parent_buffer_meta" c:identifier="gst_buffer_add_parent_buffer_meta" version="1.6">
<doc xml:space="preserve">Add a #GstParentBufferMeta to @buffer that holds a reference on
@ref until the buffer is freed.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstParentBufferMeta that was added to the buffer</doc>
<type name="ParentBufferMeta" c:type="GstParentBufferMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="ref" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer to ref</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="add_protection_meta" c:identifier="gst_buffer_add_protection_meta" version="1.6">
<doc xml:space="preserve">Attaches protection metadata to a #GstBuffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a pointer to the added #GstProtectionMeta if successful; %NULL if
unsuccessful.</doc>
<type name="ProtectionMeta" c:type="GstProtectionMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">#GstBuffer holding an encrypted sample, to which protection
metadata should be added.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="info" transfer-ownership="full">
<doc xml:space="preserve">a #GstStructure holding cryptographic
information relating to the sample contained in @buffer. This
function takes ownership of @info.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="add_reference_timestamp_meta" c:identifier="gst_buffer_add_reference_timestamp_meta" version="1.14">
<doc xml:space="preserve">Add a #GstReferenceTimestampMeta to @buffer that holds a @timestamp and
optionally @duration based on a specific timestamp @reference. See the
documentation of #GstReferenceTimestampMeta for details.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstReferenceTimestampMeta that was added to the buffer</doc>
<type name="ReferenceTimestampMeta" c:type="GstReferenceTimestampMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="reference" transfer-ownership="none">
<doc xml:space="preserve">identifier for the timestamp reference.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">timestamp</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="duration" transfer-ownership="none">
<doc xml:space="preserve">duration, or %GST_CLOCK_TIME_NONE</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="append" c:identifier="gst_buffer_append">
<doc xml:space="preserve">Append all the memory from @buf2 to @buf1. The result buffer will contain a
concatenation of the memory of @buf1 and @buf2.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBuffer that contains the memory
of the two source buffers.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="buf1" transfer-ownership="full">
<doc xml:space="preserve">the first source #GstBuffer to append.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="buf2" transfer-ownership="full">
<doc xml:space="preserve">the second source #GstBuffer to append.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="append_memory" c:identifier="gst_buffer_append_memory">
<doc xml:space="preserve">Append the memory block @mem to @buffer. This function takes
ownership of @mem and thus doesn't increase its refcount.
This function is identical to gst_buffer_insert_memory() with an index of -1.
See gst_buffer_insert_memory() for more details.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="append_region" c:identifier="gst_buffer_append_region">
<doc xml:space="preserve">Append @size bytes at @offset from @buf2 to @buf1. The result buffer will
contain a concatenation of the memory of @buf1 and the requested region of
@buf2.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBuffer that contains the memory
of the two source buffers.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="buf1" transfer-ownership="full">
<doc xml:space="preserve">the first source #GstBuffer to append.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="buf2" transfer-ownership="full">
<doc xml:space="preserve">the second source #GstBuffer to append.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset in @buf2</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size or -1 of @buf2</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_buffer_copy" introspectable="0">
<doc xml:space="preserve">Create a copy of the given buffer. This will only copy the buffer's
data to a newly allocated memory if needed (if the type of memory
requires it), otherwise the underlying data is just referenced.
Check gst_buffer_copy_deep() if you want to force the data
to be copied to newly allocated memory.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @buf.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="buf" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="const GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_deep" c:identifier="gst_buffer_copy_deep" version="1.6">
<doc xml:space="preserve">Create a copy of the given buffer. This will make a newly allocated
copy of the data the source buffer contains.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @buf.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="buf" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="const GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_into" c:identifier="gst_buffer_copy_into">
<doc xml:space="preserve">Copies the information from @src into @dest.
If @dest already contains memory and @flags contains GST_BUFFER_COPY_MEMORY,
the memory from @src will be appended to @dest.
@flags indicate which fields will be copied.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the copying succeeded, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">a destination #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a source #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">flags indicating what metadata fields should be copied.</doc>
<type name="BufferCopyFlags" c:type="GstBufferCopyFlags"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">offset to copy from</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">total size to copy. If -1, all data is copied.</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="copy_region" c:identifier="gst_buffer_copy_region">
<doc xml:space="preserve">Creates a sub-buffer from @parent at @offset and @size.
This sub-buffer uses the actual memory space of the parent buffer.
This function will copy the offset and timestamp fields when the
offset is 0. If not, they will be set to #GST_CLOCK_TIME_NONE and
#GST_BUFFER_OFFSET_NONE.
If @offset equals 0 and @size equals the total size of @buffer, the
duration and offset end fields are also copied. If not they will be set
to #GST_CLOCK_TIME_NONE and #GST_BUFFER_OFFSET_NONE.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBuffer or %NULL if the arguments were
invalid.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstBufferCopyFlags</doc>
<type name="BufferCopyFlags" c:type="GstBufferCopyFlags"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset into parent #GstBuffer at which the new sub-buffer
begins.</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of the new #GstBuffer sub-buffer, in bytes. If -1, all
data is copied.</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="extract" c:identifier="gst_buffer_extract">
<doc xml:space="preserve">Copy @size bytes starting from @offset in @buffer to @dest.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The amount of bytes extracted. This value can be lower than @size
when @buffer did not contain enough data.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset to extract</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">
the destination address</doc>
<array length="2" zero-terminated="0" c:type="gpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="size" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the size to extract</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="extract_dup" c:identifier="gst_buffer_extract_dup" version="1.0.10">
<doc xml:space="preserve">Extracts a copy of at most @size bytes the data at @offset into
newly-allocated memory. @dest must be freed using g_free() when done.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset to extract</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size to extract</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="dest" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer where
the destination array will be written. Might be %NULL if the size is 0.</doc>
<array length="3" zero-terminated="0" c:type="gpointer*">
<type name="guint8"/>
</array>
</parameter>
<parameter name="dest_size" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A location where the size of @dest can be written</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="fill" c:identifier="gst_buffer_fill">
<doc xml:space="preserve">Copy @size bytes from @src to @buffer at @offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The amount of bytes copied. This value can be lower than @size
when @buffer did not contain enough data.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset to fill</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the source address</doc>
<array length="2" zero-terminated="0" c:type="gconstpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size to fill</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="find_memory" c:identifier="gst_buffer_find_memory">
<doc xml:space="preserve">Find the memory blocks that span @size bytes starting from @offset
in @buffer.
When this function returns %TRUE, @idx will contain the index of the first
memory block where the byte for @offset can be found and @length contains the
number of memory blocks containing the @size remaining bytes. @skip contains
the number of bytes to skip in the memory block at @idx to get to the byte
for @offset.
@size can be -1 to get all the memory blocks after @idx.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @size bytes starting from @offset could be found in
@buffer and @idx, @length and @skip will be filled.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">an offset</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">a size</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="idx" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to index</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="length" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to length</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="skip" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to skip</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="foreach_meta" c:identifier="gst_buffer_foreach_meta">
<doc xml:space="preserve">Call @func with @user_data for each meta in @buffer.
@func can modify the passed meta pointer or its contents. The return value
of @func define if this function returns or if the remaining metadata items
in the buffer should be skipped.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE when @func returned %FALSE for one of the metadata.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a #GstBufferForeachMetaFunc to call</doc>
<type name="BufferForeachMetaFunc" c:type="GstBufferForeachMetaFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get_all_memory" c:identifier="gst_buffer_get_all_memory">
<doc xml:space="preserve">Get all the memory block in @buffer. The memory blocks will be merged
into one large #GstMemory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstMemory that contains the merged memory.
Use gst_memory_unref () after usage.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_flags" c:identifier="gst_buffer_get_flags" version="1.10">
<doc xml:space="preserve">Get the #GstBufferFlags flags set on this buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the flags set on this buffer.</doc>
<type name="BufferFlags" c:type="GstBufferFlags"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_memory" c:identifier="gst_buffer_get_memory">
<doc xml:space="preserve">Get the memory block at index @idx in @buffer.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstMemory that contains the data of the
memory block at @idx. Use gst_memory_unref () after usage.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_memory_range" c:identifier="gst_buffer_get_memory_range">
<doc xml:space="preserve">Get @length memory blocks in @buffer starting at @idx. The memory blocks will
be merged into one large #GstMemory.
If @length is -1, all memory starting from @idx is merged.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstMemory that contains the merged data of @length
blocks starting at @idx. Use gst_memory_unref () after usage.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="get_meta" c:identifier="gst_buffer_get_meta">
<doc xml:space="preserve">Get the metadata for @api on buffer. When there is no such metadata, %NULL is
returned. If multiple metadata with the given @api are attached to this
buffer only the first one is returned. To handle multiple metadata with a
given API use gst_buffer_iterate_meta() or gst_buffer_foreach_meta() instead
and check the meta-&gt;info.api member for the API type.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the metadata for @api on
@buffer.</doc>
<type name="Meta" c:type="GstMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">the #GType of an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="get_n_meta" c:identifier="gst_buffer_get_n_meta" version="1.14">
<return-value transfer-ownership="none">
<doc xml:space="preserve">number of metas of type @api_type on @buffer.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="api_type" transfer-ownership="none">
<doc xml:space="preserve">the #GType of an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="get_reference_timestamp_meta" c:identifier="gst_buffer_get_reference_timestamp_meta" version="1.14">
<doc xml:space="preserve">Find the first #GstReferenceTimestampMeta on @buffer that conforms to
@reference. Conformance is tested by checking if the meta's reference is a
subset of @reference.
Buffers can contain multiple #GstReferenceTimestampMeta metadata items.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstReferenceTimestampMeta or %NULL when there
is no such metadata on @buffer.</doc>
<type name="ReferenceTimestampMeta" c:type="GstReferenceTimestampMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="reference" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a reference #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="get_size" c:identifier="gst_buffer_get_size">
<doc xml:space="preserve">Get the total size of the memory blocks in @buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">total size of the memory blocks in @buffer.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_sizes" c:identifier="gst_buffer_get_sizes">
<doc xml:space="preserve">Get the total size of the memory blocks in @b.
When not %NULL, @offset will contain the offset of the data in the
first memory block in @buffer and @maxsize will contain the sum of
the size and @offset and the amount of extra padding on the last
memory block. @offset and @maxsize can be used to resize the
buffer memory blocks with gst_buffer_resize().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">total size of the memory blocks in @buffer.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to the offset</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
<parameter name="maxsize" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to the maxsize</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="get_sizes_range" c:identifier="gst_buffer_get_sizes_range">
<doc xml:space="preserve">Get the total size of @length memory blocks stating from @idx in @buffer.
When not %NULL, @offset will contain the offset of the data in the
memory block in @buffer at @idx and @maxsize will contain the sum of the size
and @offset and the amount of extra padding on the memory block at @idx +
@length -1.
@offset and @maxsize can be used to resize the buffer memory blocks with
gst_buffer_resize_range().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">total size of @length memory blocks starting at @idx in @buffer.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="offset" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to the offset</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
<parameter name="maxsize" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to the maxsize</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="has_flags" c:identifier="gst_buffer_has_flags" version="1.10">
<doc xml:space="preserve">Gives the status of a specific flag on a buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if all flags in @flags are found on @buffer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstBufferFlags flag to check.</doc>
<type name="BufferFlags" c:type="GstBufferFlags"/>
</parameter>
</parameters>
</method>
<method name="insert_memory" c:identifier="gst_buffer_insert_memory">
<doc xml:space="preserve">Insert the memory block @mem to @buffer at @idx. This function takes ownership
of @mem and thus doesn't increase its refcount.
Only gst_buffer_get_max_memory() can be added to a buffer. If more memory is
added, existing memory blocks will automatically be merged to make room for
the new memory.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index to add the memory at, or -1 to append it to the end</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="is_all_memory_writable" c:identifier="gst_buffer_is_all_memory_writable" version="1.4">
<doc xml:space="preserve">Check if all memory blocks in @buffer are writable.
Note that this function does not check if @buffer is writable, use
gst_buffer_is_writable() to check that if needed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if all memory blocks in @buffer are writable</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_memory_range_writable" c:identifier="gst_buffer_is_memory_range_writable" version="1.4">
<doc xml:space="preserve">Check if @length memory blocks in @buffer starting from @idx are writable.
@length can be -1 to check all the memory blocks after @idx.
Note that this function does not check if @buffer is writable, use
gst_buffer_is_writable() to check that if needed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the memory range is writable</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length should not be 0</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="iterate_meta" c:identifier="gst_buffer_iterate_meta" introspectable="0">
<doc xml:space="preserve">Retrieve the next #GstMeta after @current. If @state points
to %NULL, the first metadata is returned.
@state will be updated with an opaque state pointer</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The next #GstMeta or %NULL
when there are no more items.</doc>
<type name="Meta" c:type="GstMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="state" direction="out" caller-allocates="1" transfer-ownership="none" nullable="1">
<doc xml:space="preserve">an opaque state pointer</doc>
<type name="gpointer" c:type="gpointer*"/>
</parameter>
</parameters>
</method>
<method name="iterate_meta_filtered" c:identifier="gst_buffer_iterate_meta_filtered" version="1.12" introspectable="0">
<doc xml:space="preserve">Retrieve the next #GstMeta of type @meta_api_type after the current one
according to @state. If @state points to %NULL, the first metadata of
type @meta_api_type is returned.
@state will be updated with an opaque state pointer</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The next #GstMeta of type
@meta_api_type or %NULL when there are no more items.</doc>
<type name="Meta" c:type="GstMeta*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="state" direction="out" caller-allocates="1" transfer-ownership="none" nullable="1">
<doc xml:space="preserve">an opaque state pointer</doc>
<type name="gpointer" c:type="gpointer*"/>
</parameter>
<parameter name="meta_api_type" transfer-ownership="none">
<doc xml:space="preserve">only return #GstMeta of this type</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="map" c:identifier="gst_buffer_map">
<doc xml:space="preserve">This function fills @info with the #GstMapInfo of all merged memory
blocks in @buffer.
@flags describe the desired access of the memory. When @flags is
#GST_MAP_WRITE, @buffer should be writable (as returned from
gst_buffer_is_writable()).
When @buffer is writable but the memory isn't, a writable copy will
automatically be created and returned. The readonly copy of the
buffer memory will then also be replaced with this writable copy.
The memory in @info should be unmapped with gst_buffer_unmap() after
usage.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the map succeeded and @info contains valid data.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="info" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">info about the mapping</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">flags for the mapping</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</parameter>
</parameters>
</method>
<method name="map_range" c:identifier="gst_buffer_map_range">
<doc xml:space="preserve">This function fills @info with the #GstMapInfo of @length merged memory blocks
starting at @idx in @buffer. When @length is -1, all memory blocks starting
from @idx are merged and mapped.
@flags describe the desired access of the memory. When @flags is
#GST_MAP_WRITE, @buffer should be writable (as returned from
gst_buffer_is_writable()).
When @buffer is writable but the memory isn't, a writable copy will
automatically be created and returned. The readonly copy of the buffer memory
will then also be replaced with this writable copy.
The memory in @info should be unmapped with gst_buffer_unmap() after usage.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the map succeeded and @info contains valid
data.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="info" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">info about the mapping</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">flags for the mapping</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</parameter>
</parameters>
</method>
<method name="memcmp" c:identifier="gst_buffer_memcmp">
<doc xml:space="preserve">Compare @size bytes starting from @offset in @buffer with the memory in @mem.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">0 if the memory is equal.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset in @buffer</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">the memory to compare</doc>
<array length="2" zero-terminated="0" c:type="gconstpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size to compare</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="memset" c:identifier="gst_buffer_memset">
<doc xml:space="preserve">Fill @buf with @size bytes with @val starting from @offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The amount of bytes filled. This value can be lower than @size
when @buffer did not contain enough data.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset in @buffer</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">the value to set</doc>
<type name="guint8" c:type="guint8"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size to set</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="n_memory" c:identifier="gst_buffer_n_memory">
<doc xml:space="preserve">Get the amount of memory blocks that this buffer has. This amount is never
larger than what gst_buffer_get_max_memory() returns.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of memory blocks this buffer is made of.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="peek_memory" c:identifier="gst_buffer_peek_memory">
<doc xml:space="preserve">Get the memory block at @idx in @buffer. The memory block stays valid until
the memory block in @buffer is removed, replaced or merged, typically with
any call that modifies the memory in @buffer.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstMemory at @idx.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="prepend_memory" c:identifier="gst_buffer_prepend_memory">
<doc xml:space="preserve">Prepend the memory block @mem to @buffer. This function takes
ownership of @mem and thus doesn't increase its refcount.
This function is identical to gst_buffer_insert_memory() with an index of 0.
See gst_buffer_insert_memory() for more details.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_buffer_ref" introspectable="0">
<doc xml:space="preserve">Increases the refcount of the given buffer by one.
Note that the refcount affects the writability
of @buf and its metadata, see gst_buffer_is_writable().
It is important to note that keeping additional references to
GstBuffer instances can potentially increase the number
of memcpy operations in a pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@buf</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="buf" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_all_memory" c:identifier="gst_buffer_remove_all_memory">
<doc xml:space="preserve">Remove all the memory blocks in @buffer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_memory" c:identifier="gst_buffer_remove_memory">
<doc xml:space="preserve">Remove the memory block in @b at index @i.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="remove_memory_range" c:identifier="gst_buffer_remove_memory_range">
<doc xml:space="preserve">Remove @length memory blocks in @buffer starting from @idx.
@length can be -1, in which case all memory starting from @idx is removed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="remove_meta" c:identifier="gst_buffer_remove_meta">
<doc xml:space="preserve">Remove the metadata for @meta on @buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the metadata existed and was removed, %FALSE if no such
metadata was on @buffer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="meta" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="GstMeta*"/>
</parameter>
</parameters>
</method>
<method name="replace_all_memory" c:identifier="gst_buffer_replace_all_memory">
<doc xml:space="preserve">Replaces all memory in @buffer with @mem.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="replace_memory" c:identifier="gst_buffer_replace_memory">
<doc xml:space="preserve">Replaces the memory block at index @idx in @buffer with @mem.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="replace_memory_range" c:identifier="gst_buffer_replace_memory_range">
<doc xml:space="preserve">Replaces @length memory blocks in @buffer starting at @idx with @mem.
If @length is -1, all memory starting from @idx will be removed and
replaced with @mem.
@buffer should be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length should not be 0</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</method>
<method name="resize" c:identifier="gst_buffer_resize">
<doc xml:space="preserve">Set the offset and total size of the memory blocks in @buffer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset adjustment</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the new size or -1 to just adjust the offset</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="resize_range" c:identifier="gst_buffer_resize_range">
<doc xml:space="preserve">Set the total size of the @length memory blocks starting at @idx in
@buffer</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if resizing succeeded, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">an index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">a length</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset adjustment</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the new size or -1 to just adjust the offset</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="set_flags" c:identifier="gst_buffer_set_flags" version="1.10">
<doc xml:space="preserve">Sets one or more buffer flags on a buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @flags were successfully set on buffer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstBufferFlags to set.</doc>
<type name="BufferFlags" c:type="GstBufferFlags"/>
</parameter>
</parameters>
</method>
<method name="set_size" c:identifier="gst_buffer_set_size">
<doc xml:space="preserve">Set the total size of the memory blocks in @buffer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the new size</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="unmap" c:identifier="gst_buffer_unmap">
<doc xml:space="preserve">Release the memory previously mapped with gst_buffer_map().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstMapInfo</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_buffer_unref" introspectable="0">
<doc xml:space="preserve">Decreases the refcount of the buffer. If the refcount reaches 0, the buffer
with the associated metadata and memory will be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="buf" transfer-ownership="full">
<doc xml:space="preserve">a #GstBuffer.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
</parameters>
</method>
<method name="unset_flags" c:identifier="gst_buffer_unset_flags" version="1.10">
<doc xml:space="preserve">Clears one or more buffer flags.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">true if @flags is successfully cleared from buffer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstBufferFlags to clear</doc>
<type name="BufferFlags" c:type="GstBufferFlags"/>
</parameter>
</parameters>
</method>
<function name="get_max_memory" c:identifier="gst_buffer_get_max_memory" version="1.2">
<doc xml:space="preserve">Get the maximum amount of memory blocks that a buffer can hold. This is a
compile time constant that can be queried with the function.
When more memory blocks are added, existing memory blocks will be merged
together to make room for the new block.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the maximum amount of memory blocks that a buffer can hold.</doc>
<type name="guint" c:type="guint"/>
</return-value>
</function>
<function name="replace" c:identifier="gst_buffer_replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstBuffer to point to a different #GstBuffer. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
buffer is unreffed, the new is reffed).
Either @nbuf or the #GstBuffer pointed to by @obuf may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @obuf was different from @nbuf.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="obuf" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to
a #GstBuffer to be replaced.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="nbuf" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstBuffer that will
replace the buffer pointed to by @obuf.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</function>
</record>
<bitfield name="BufferCopyFlags" glib:type-name="GstBufferCopyFlags" glib:get-type="gst_buffer_copy_flags_get_type" c:type="GstBufferCopyFlags">
<doc xml:space="preserve">A set of flags that can be provided to the gst_buffer_copy_into()
function to specify which items should be copied.</doc>
<member name="none" value="0" c:identifier="GST_BUFFER_COPY_NONE" glib:nick="none">
<doc xml:space="preserve">copy nothing</doc>
</member>
<member name="flags" value="1" c:identifier="GST_BUFFER_COPY_FLAGS" glib:nick="flags">
<doc xml:space="preserve">flag indicating that buffer flags should be copied</doc>
</member>
<member name="timestamps" value="2" c:identifier="GST_BUFFER_COPY_TIMESTAMPS" glib:nick="timestamps">
<doc xml:space="preserve">flag indicating that buffer pts, dts,
duration, offset and offset_end should be copied</doc>
</member>
<member name="meta" value="4" c:identifier="GST_BUFFER_COPY_META" glib:nick="meta">
<doc xml:space="preserve">flag indicating that buffer meta should be
copied</doc>
</member>
<member name="memory" value="8" c:identifier="GST_BUFFER_COPY_MEMORY" glib:nick="memory">
<doc xml:space="preserve">flag indicating that buffer memory should be reffed
and appended to already existing memory. Unless the memory is marked as
NO_SHARE, no actual copy of the memory is made but it is simply reffed.
Add @GST_BUFFER_COPY_DEEP to force a real copy.</doc>
</member>
<member name="merge" value="16" c:identifier="GST_BUFFER_COPY_MERGE" glib:nick="merge">
<doc xml:space="preserve">flag indicating that buffer memory should be
merged</doc>
</member>
<member name="deep" value="32" c:identifier="GST_BUFFER_COPY_DEEP" glib:nick="deep">
<doc xml:space="preserve">flag indicating that memory should always be
copied instead of reffed (Since: 1.2)</doc>
</member>
</bitfield>
<bitfield name="BufferFlags" glib:type-name="GstBufferFlags" glib:get-type="gst_buffer_flags_get_type" c:type="GstBufferFlags">
<doc xml:space="preserve">A set of buffer flags used to describe properties of a #GstBuffer.</doc>
<member name="live" value="16" c:identifier="GST_BUFFER_FLAG_LIVE" glib:nick="live">
<doc xml:space="preserve">the buffer is live data and should be discarded in
the PAUSED state.</doc>
</member>
<member name="decode_only" value="32" c:identifier="GST_BUFFER_FLAG_DECODE_ONLY" glib:nick="decode-only">
<doc xml:space="preserve">the buffer contains data that should be dropped
because it will be clipped against the segment
boundaries or because it does not contain data
that should be shown to the user.</doc>
</member>
<member name="discont" value="64" c:identifier="GST_BUFFER_FLAG_DISCONT" glib:nick="discont">
<doc xml:space="preserve">the buffer marks a data discontinuity in the stream.
This typically occurs after a seek or a dropped buffer
from a live or network source.</doc>
</member>
<member name="resync" value="128" c:identifier="GST_BUFFER_FLAG_RESYNC" glib:nick="resync">
<doc xml:space="preserve">the buffer timestamps might have a discontinuity
and this buffer is a good point to resynchronize.</doc>
</member>
<member name="corrupted" value="256" c:identifier="GST_BUFFER_FLAG_CORRUPTED" glib:nick="corrupted">
<doc xml:space="preserve">the buffer data is corrupted.</doc>
</member>
<member name="marker" value="512" c:identifier="GST_BUFFER_FLAG_MARKER" glib:nick="marker">
<doc xml:space="preserve">the buffer contains a media specific marker. for
video this is the end of a frame boundary, for audio
this is the start of a talkspurt.</doc>
</member>
<member name="header" value="1024" c:identifier="GST_BUFFER_FLAG_HEADER" glib:nick="header">
<doc xml:space="preserve">the buffer contains header information that is
needed to decode the following data.</doc>
</member>
<member name="gap" value="2048" c:identifier="GST_BUFFER_FLAG_GAP" glib:nick="gap">
<doc xml:space="preserve">the buffer has been created to fill a gap in the
stream and contains media neutral data (elements can
switch to optimized code path that ignores the buffer
content).</doc>
</member>
<member name="droppable" value="4096" c:identifier="GST_BUFFER_FLAG_DROPPABLE" glib:nick="droppable">
<doc xml:space="preserve">the buffer can be dropped without breaking the
stream, for example to reduce bandwidth.</doc>
</member>
<member name="delta_unit" value="8192" c:identifier="GST_BUFFER_FLAG_DELTA_UNIT" glib:nick="delta-unit">
<doc xml:space="preserve">this unit cannot be decoded independently.</doc>
</member>
<member name="tag_memory" value="16384" c:identifier="GST_BUFFER_FLAG_TAG_MEMORY" glib:nick="tag-memory">
<doc xml:space="preserve">this flag is set when memory of the buffer
is added/removed</doc>
</member>
<member name="sync_after" value="32768" c:identifier="GST_BUFFER_FLAG_SYNC_AFTER" glib:nick="sync-after">
<doc xml:space="preserve">Elements which write to disk or permanent
storage should ensure the data is synced after
writing the contents of this buffer. (Since: 1.6)</doc>
</member>
<member name="non_droppable" value="65536" c:identifier="GST_BUFFER_FLAG_NON_DROPPABLE" glib:nick="non-droppable">
<doc xml:space="preserve">This buffer is important and should not be dropped.
This can be used to mark important buffers, e.g. to flag
RTP packets carrying keyframes or codec setup data for RTP
Forward Error Correction purposes, or to prevent still video
frames from being dropped by elements due to QoS. (Since: 1.14)</doc>
</member>
<member name="last" value="1048576" c:identifier="GST_BUFFER_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">additional media specific flags can be added starting from
this flag.</doc>
</member>
</bitfield>
<callback name="BufferForeachMetaFunc" c:type="GstBufferForeachMetaFunc">
<doc xml:space="preserve">A function that will be called from gst_buffer_foreach_meta(). The @meta
field will point to a the reference of the meta.
@buffer should not be modified from this callback.
When this function returns %TRUE, the next meta will be
returned. When %FALSE is returned, gst_buffer_foreach_meta() will return.
When @meta is set to %NULL, the item will be removed from the buffer.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE when gst_buffer_foreach_meta() should stop</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="meta" direction="out" caller-allocates="0" transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a pointer to a #GstMeta</doc>
<type name="Meta" c:type="GstMeta**"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data passed to gst_buffer_foreach_meta()</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="BufferList" c:type="GstBufferList" glib:type-name="GstBufferList" glib:get-type="gst_buffer_list_get_type" c:symbol-prefix="buffer_list">
<doc xml:space="preserve">Buffer lists are an object containing a list of buffers.
Buffer lists are created with gst_buffer_list_new() and filled with data
using a gst_buffer_list_insert().
Buffer lists can be pushed on a srcpad with gst_pad_push_list(). This is
interesting when multiple buffers need to be pushed in one go because it
can reduce the amount of overhead for pushing each buffer individually.</doc>
<constructor name="new" c:identifier="gst_buffer_list_new">
<doc xml:space="preserve">Creates a new, empty #GstBufferList. The caller is responsible for unreffing
the returned #GstBufferList.
Free-function: gst_buffer_list_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBufferList. gst_buffer_list_unref()
after usage.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
</constructor>
<constructor name="new_sized" c:identifier="gst_buffer_list_new_sized">
<doc xml:space="preserve">Creates a new, empty #GstBufferList. The caller is responsible for unreffing
the returned #GstBufferList. The list will have @size space preallocated so
that memory reallocations can be avoided.
Free-function: gst_buffer_list_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstBufferList. gst_buffer_list_unref()
after usage.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">an initial reserved size</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</constructor>
<method name="calculate_size" c:identifier="gst_buffer_list_calculate_size" version="1.14">
<doc xml:space="preserve">Calculates the size of the data contained in buffer list by adding the
size of all buffers.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the size of the data contained in buffer list in bytes.</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_buffer_list_copy" introspectable="0">
<doc xml:space="preserve">Create a shallow copy of the given buffer list. This will make a newly
allocated copy of the source list with copies of buffer pointers. The
refcount of buffers pointed to will be increased by one.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @list.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="const GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_deep" c:identifier="gst_buffer_list_copy_deep" version="1.6">
<doc xml:space="preserve">Create a copy of the given buffer list. This will make a newly allocated
copy of the buffer that the source buffer list contains.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @list.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="const GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
<method name="foreach" c:identifier="gst_buffer_list_foreach">
<doc xml:space="preserve">Call @func with @data for each buffer in @list.
@func can modify the passed buffer pointer or its contents. The return value
of @func define if this function returns or if the remaining buffers in
the list should be skipped.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @func returned %TRUE for each buffer in @list or when
@list is empty.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a #GstBufferListFunc to call</doc>
<type name="BufferListFunc" c:type="GstBufferListFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get" c:identifier="gst_buffer_list_get">
<doc xml:space="preserve">Get the buffer at @idx.
You must make sure that @idx does not exceed the number of
buffers available.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the buffer at @idx in @group
or %NULL when there is no buffer. The buffer remains valid as
long as @list is valid and buffer is not removed from the list.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_writable" c:identifier="gst_buffer_list_get_writable" version="1.14">
<doc xml:space="preserve">Gets the buffer at @idx, ensuring it is a writable buffer.
You must make sure that @idx does not exceed the number of
buffers available.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the buffer at @idx in @group.
The returned buffer remains valid as long as @list is valid and
the buffer is not removed from the list.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a (writable) #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="insert" c:identifier="gst_buffer_list_insert">
<doc xml:space="preserve">Insert @buffer at @idx in @list. Other buffers are moved to make room for
this new buffer.
A -1 value for @idx will append the buffer at the end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="length" c:identifier="gst_buffer_list_length">
<doc xml:space="preserve">Returns the number of buffers in @list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of buffers in the buffer list</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_buffer_list_ref" introspectable="0">
<doc xml:space="preserve">Increases the refcount of the given buffer list by one.
Note that the refcount affects the writability of @list and its data, see
gst_buffer_list_make_writable(). It is important to note that keeping
additional references to GstBufferList instances can potentially increase
the number of memcpy operations in a pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@list</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove" c:identifier="gst_buffer_list_remove">
<doc xml:space="preserve">Remove @length buffers starting from @idx in @list. The following buffers
are moved to close the gap.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">the amount to remove</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_buffer_list_unref" introspectable="0">
<doc xml:space="preserve">Decreases the refcount of the buffer list. If the refcount reaches 0, the
buffer list will be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</instance-parameter>
</parameters>
</method>
</record>
<callback name="BufferListFunc" c:type="GstBufferListFunc">
<doc xml:space="preserve">A function that will be called from gst_buffer_list_foreach(). The @buffer
field will point to a the reference of the buffer at @idx.
When this function returns %TRUE, the next buffer will be
returned. When %FALSE is returned, gst_buffer_list_foreach() will return.
When @buffer is set to %NULL, the item will be removed from the bufferlist.
When @buffer has been made writable, the new buffer reference can be assigned
to @buffer. This function is responsible for unreffing the old buffer when
removing or modifying.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE when gst_buffer_list_foreach() should stop</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full" nullable="1">
<doc xml:space="preserve">pointer the buffer</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index of @buffer</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data passed to gst_buffer_list_foreach()</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<class name="BufferPool" c:symbol-prefix="buffer_pool" c:type="GstBufferPool" parent="Object" glib:type-name="GstBufferPool" glib:get-type="gst_buffer_pool_get_type" glib:type-struct="BufferPoolClass">
<doc xml:space="preserve">A #GstBufferPool is an object that can be used to pre-allocate and recycle
buffers of the same size and with the same properties.
A #GstBufferPool is created with gst_buffer_pool_new().
Once a pool is created, it needs to be configured. A call to
gst_buffer_pool_get_config() returns the current configuration structure from
the pool. With gst_buffer_pool_config_set_params() and
gst_buffer_pool_config_set_allocator() the bufferpool parameters and
allocator can be configured. Other properties can be configured in the pool
depending on the pool implementation.
A bufferpool can have extra options that can be enabled with
gst_buffer_pool_config_add_option(). The available options can be retrieved
with gst_buffer_pool_get_options(). Some options allow for additional
configuration properties to be set.
After the configuration structure has been configured,
gst_buffer_pool_set_config() updates the configuration in the pool. This can
fail when the configuration structure is not accepted.
After the a pool has been configured, it can be activated with
gst_buffer_pool_set_active(). This will preallocate the configured resources
in the pool.
When the pool is active, gst_buffer_pool_acquire_buffer() can be used to
retrieve a buffer from the pool.
Buffers allocated from a bufferpool will automatically be returned to the
pool with gst_buffer_pool_release_buffer() when their refcount drops to 0.
The bufferpool can be deactivated again with gst_buffer_pool_set_active().
All further gst_buffer_pool_acquire_buffer() calls will return an error. When
all buffers are returned to the pool they will be freed.
Use gst_object_unref() to release the reference to a bufferpool. If the
refcount of the pool reaches 0, the pool will be freed.</doc>
<constructor name="new" c:identifier="gst_buffer_pool_new">
<doc xml:space="preserve">Creates a new #GstBufferPool instance.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstBufferPool instance</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</return-value>
</constructor>
<function name="config_add_option" c:identifier="gst_buffer_pool_config_add_option">
<doc xml:space="preserve">Enabled the option in @config. This will instruct the @bufferpool to enable
the specified option on the buffers that it allocates.
The supported options by @pool can be retrieved with gst_buffer_pool_get_options().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="option" transfer-ownership="none">
<doc xml:space="preserve">an option to add</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="config_get_allocator" c:identifier="gst_buffer_pool_config_get_allocator">
<doc xml:space="preserve">Get the @allocator and @params from @config.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the values are set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="allocator" direction="out" caller-allocates="0" transfer-ownership="none" nullable="1" optional="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocator, or %NULL</doc>
<type name="Allocator" c:type="GstAllocator**"/>
</parameter>
<parameter name="params" direction="out" caller-allocates="1" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">#GstAllocationParams, or %NULL</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</function>
<function name="config_get_option" c:identifier="gst_buffer_pool_config_get_option">
<doc xml:space="preserve">Parse an available @config and get the option at @index of the options API
array.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #gchar of the option at @index.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the option array to read</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="config_get_params" c:identifier="gst_buffer_pool_config_get_params">
<doc xml:space="preserve">Get the configuration values from @config.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if all parameters could be fetched.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="caps" direction="out" caller-allocates="0" transfer-ownership="none" nullable="1" optional="1" allow-none="1">
<doc xml:space="preserve">the caps of buffers</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="size" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the size of each buffer, not including prefix and padding</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="min_buffers" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the minimum amount of buffers to allocate.</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="max_buffers" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the maximum amount of buffers to allocate or 0 for unlimited.</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</function>
<function name="config_has_option" c:identifier="gst_buffer_pool_config_has_option">
<doc xml:space="preserve">Check if @config contains @option.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the options array contains @option.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="option" transfer-ownership="none">
<doc xml:space="preserve">an option</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="config_n_options" c:identifier="gst_buffer_pool_config_n_options">
<doc xml:space="preserve">Retrieve the number of values currently stored in the options array of the
@config structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the options array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</function>
<function name="config_set_allocator" c:identifier="gst_buffer_pool_config_set_allocator">
<doc xml:space="preserve">Set the @allocator and @params on @config.
One of @allocator and @params can be %NULL, but not both. When @allocator
is %NULL, the default allocator of the pool will use the values in @param
to perform its allocation. When @param is %NULL, the pool will use the
provided @allocator with its default #GstAllocationParams.
A call to gst_buffer_pool_set_config() can update the allocator and params
with the values that it is able to do. Some pools are, for example, not able
to operate with different allocators or cannot allocate with the values
specified in @params. Use gst_buffer_pool_get_config() to get the currently
used values.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">#GstAllocationParams</doc>
<type name="AllocationParams" c:type="const GstAllocationParams*"/>
</parameter>
</parameters>
</function>
<function name="config_set_params" c:identifier="gst_buffer_pool_config_set_params">
<doc xml:space="preserve">Configure @config with the given parameters.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">caps for the buffers</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of each buffer, not including prefix and padding</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_buffers" transfer-ownership="none">
<doc xml:space="preserve">the minimum amount of buffers to allocate.</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="max_buffers" transfer-ownership="none">
<doc xml:space="preserve">the maximum amount of buffers to allocate or 0 for unlimited.</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="config_validate_params" c:identifier="gst_buffer_pool_config_validate_params" version="1.4">
<doc xml:space="preserve">Validate that changes made to @config are still valid in the context of the
expected parameters. This function is a helper that can be used to validate
changes made by a pool to a config when gst_buffer_pool_set_config()
returns %FALSE. This expects that @caps haven't changed and that
@min_buffers aren't lower then what we initially expected.
This does not check if options or allocator parameters are still valid,
won't check if size have changed, since changing the size is valid to adapt
padding.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the parameters are valid in this context.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="config" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool configuration</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the excepted caps of buffers</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the expected size of each buffer, not including prefix and padding</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_buffers" transfer-ownership="none">
<doc xml:space="preserve">the expected minimum amount of buffers to allocate.</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="max_buffers" transfer-ownership="none">
<doc xml:space="preserve">the expect maximum amount of buffers to allocate or 0 for unlimited.</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<virtual-method name="acquire_buffer" invoker="acquire_buffer">
<doc xml:space="preserve">Acquire a buffer from @pool. @buffer should point to a memory location that
can hold a pointer to the new buffer.
@params can be %NULL or contain optional parameters to influence the
allocation.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn such as %GST_FLOW_FLUSHING when the pool is
inactive.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a location for a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">parameters.</doc>
<type name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="alloc_buffer">
<return-value transfer-ownership="none">
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="params" transfer-ownership="none">
<type name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="flush_start">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="flush_stop">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="free_buffer">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_options" invoker="get_options">
<doc xml:space="preserve">Get a %NULL terminated array of string with supported bufferpool options for
@pool. An option would typically be enabled with
gst_buffer_pool_config_add_option().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %NULL terminated array
of strings.</doc>
<array c:type="const gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="release_buffer" invoker="release_buffer">
<doc xml:space="preserve">Release @buffer to @pool. @buffer should have previously been allocated from
@pool with gst_buffer_pool_acquire_buffer().
This function is usually called automatically when the last ref on @buffer
disappears.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="reset_buffer">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_config" invoker="set_config">
<doc xml:space="preserve">Set the configuration of the pool. If the pool is already configured, and
the configuration haven't change, this function will return %TRUE. If the
pool is active, this method will return %FALSE and active configuration
will remain. Buffers allocated form this pool must be returned or else this
function will do nothing and return %FALSE.
@config is a #GstStructure that contains the configuration parameters for
the pool. A default and mandatory set of parameters can be configured with
gst_buffer_pool_config_set_params(), gst_buffer_pool_config_set_allocator()
and gst_buffer_pool_config_add_option().
If the parameters in @config can not be set exactly, this function returns
%FALSE and will try to update as much state as possible. The new state can
then be retrieved and refined with gst_buffer_pool_get_config().
This function takes ownership of @config.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when the configuration could be set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="config" transfer-ownership="full">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="start">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="stop">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<method name="acquire_buffer" c:identifier="gst_buffer_pool_acquire_buffer">
<doc xml:space="preserve">Acquire a buffer from @pool. @buffer should point to a memory location that
can hold a pointer to the new buffer.
@params can be %NULL or contain optional parameters to influence the
allocation.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn such as %GST_FLOW_FLUSHING when the pool is
inactive.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a location for a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">parameters.</doc>
<type name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams*"/>
</parameter>
</parameters>
</method>
<method name="get_config" c:identifier="gst_buffer_pool_get_config">
<doc xml:space="preserve">Get a copy of the current configuration of the pool. This configuration
can either be modified and used for the gst_buffer_pool_set_config() call
or it must be freed after usage.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a copy of the current configuration of @pool. use
gst_structure_free() after usage or gst_buffer_pool_set_config().</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_options" c:identifier="gst_buffer_pool_get_options">
<doc xml:space="preserve">Get a %NULL terminated array of string with supported bufferpool options for
@pool. An option would typically be enabled with
gst_buffer_pool_config_add_option().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %NULL terminated array
of strings.</doc>
<array c:type="const gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_option" c:identifier="gst_buffer_pool_has_option">
<doc xml:space="preserve">Check if the bufferpool supports @option.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the buffer pool contains @option.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="option" transfer-ownership="none">
<doc xml:space="preserve">an option</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="is_active" c:identifier="gst_buffer_pool_is_active">
<doc xml:space="preserve">Check if @pool is active. A pool can be activated with the
gst_buffer_pool_set_active() call.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when the pool is active.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
</parameters>
</method>
<method name="release_buffer" c:identifier="gst_buffer_pool_release_buffer">
<doc xml:space="preserve">Release @buffer to @pool. @buffer should have previously been allocated from
@pool with gst_buffer_pool_acquire_buffer().
This function is usually called automatically when the last ref on @buffer
disappears.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="set_active" c:identifier="gst_buffer_pool_set_active">
<doc xml:space="preserve">Control the active state of @pool. When the pool is inactive, new calls to
gst_buffer_pool_acquire_buffer() will return with %GST_FLOW_FLUSHING.
Activating the bufferpool will preallocate all resources in the pool based on
the configuration of the pool.
Deactivating will free the resources again when there are no outstanding
buffers. When there are outstanding buffers, they will be freed as soon as
they are all returned to the pool.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE when the pool was not configured or when preallocation of the
buffers failed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">the new active state</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_config" c:identifier="gst_buffer_pool_set_config">
<doc xml:space="preserve">Set the configuration of the pool. If the pool is already configured, and
the configuration haven't change, this function will return %TRUE. If the
pool is active, this method will return %FALSE and active configuration
will remain. Buffers allocated form this pool must be returned or else this
function will do nothing and return %FALSE.
@config is a #GstStructure that contains the configuration parameters for
the pool. A default and mandatory set of parameters can be configured with
gst_buffer_pool_config_set_params(), gst_buffer_pool_config_set_allocator()
and gst_buffer_pool_config_add_option().
If the parameters in @config can not be set exactly, this function returns
%FALSE and will try to update as much state as possible. The new state can
then be retrieved and refined with gst_buffer_pool_get_config().
This function takes ownership of @config.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when the configuration could be set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="config" transfer-ownership="full">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="set_flushing" c:identifier="gst_buffer_pool_set_flushing" version="1.4">
<doc xml:space="preserve">Enable or disable the flushing state of a @pool without freeing or
allocating buffers.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</instance-parameter>
<parameter name="flushing" transfer-ownership="none">
<doc xml:space="preserve">whether to start or stop flushing</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="flushing">
<type name="gint" c:type="gint"/>
</field>
<field name="priv" readable="0" private="1">
<type name="BufferPoolPrivate" c:type="GstBufferPoolPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<bitfield name="BufferPoolAcquireFlags" glib:type-name="GstBufferPoolAcquireFlags" glib:get-type="gst_buffer_pool_acquire_flags_get_type" c:type="GstBufferPoolAcquireFlags">
<doc xml:space="preserve">Additional flags to control the allocation of a buffer</doc>
<member name="none" value="0" c:identifier="GST_BUFFER_POOL_ACQUIRE_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">no flags</doc>
</member>
<member name="key_unit" value="1" c:identifier="GST_BUFFER_POOL_ACQUIRE_FLAG_KEY_UNIT" glib:nick="key-unit">
<doc xml:space="preserve">buffer is keyframe</doc>
</member>
<member name="dontwait" value="2" c:identifier="GST_BUFFER_POOL_ACQUIRE_FLAG_DONTWAIT" glib:nick="dontwait">
<doc xml:space="preserve">when the bufferpool is empty, acquire_buffer
will by default block until a buffer is released into the pool again. Setting
this flag makes acquire_buffer return #GST_FLOW_EOS instead of blocking.</doc>
</member>
<member name="discont" value="4" c:identifier="GST_BUFFER_POOL_ACQUIRE_FLAG_DISCONT" glib:nick="discont">
<doc xml:space="preserve">buffer is discont</doc>
</member>
<member name="last" value="65536" c:identifier="GST_BUFFER_POOL_ACQUIRE_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">last flag, subclasses can use private flags
starting from this value.</doc>
</member>
</bitfield>
<record name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams">
<doc xml:space="preserve">Parameters passed to the gst_buffer_pool_acquire_buffer() function to control the
allocation of the buffer.
The default implementation ignores the @start and @stop members but other
implementations can use this extra information to decide what buffer to
return.</doc>
<field name="format" writable="1">
<doc xml:space="preserve">the format of @start and @stop</doc>
<type name="Format" c:type="GstFormat"/>
</field>
<field name="start" writable="1">
<doc xml:space="preserve">the start position</doc>
<type name="gint64" c:type="gint64"/>
</field>
<field name="stop" writable="1">
<doc xml:space="preserve">the stop position</doc>
<type name="gint64" c:type="gint64"/>
</field>
<field name="flags" writable="1">
<doc xml:space="preserve">additional flags</doc>
<type name="BufferPoolAcquireFlags" c:type="GstBufferPoolAcquireFlags"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="BufferPoolClass" c:type="GstBufferPoolClass" glib:is-gtype-struct-for="BufferPool">
<doc xml:space="preserve">The GstBufferPool class.</doc>
<field name="object_class">
<doc xml:space="preserve">Object parent class</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="get_options">
<callback name="get_options">
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %NULL terminated array
of strings.</doc>
<array c:type="const gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_config">
<callback name="set_config">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when the configuration could be set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="config" transfer-ownership="full">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="start">
<callback name="start">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="stop">
<callback name="stop">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="acquire_buffer">
<callback name="acquire_buffer">
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn such as %GST_FLOW_FLUSHING when the pool is
inactive.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a location for a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">parameters.</doc>
<type name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="alloc_buffer">
<callback name="alloc_buffer">
<return-value transfer-ownership="none">
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="params" transfer-ownership="none">
<type name="BufferPoolAcquireParams" c:type="GstBufferPoolAcquireParams*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="reset_buffer">
<callback name="reset_buffer">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="release_buffer">
<callback name="release_buffer">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="free_buffer">
<callback name="free_buffer">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="flush_start">
<callback name="flush_start">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="flush_stop">
<callback name="flush_stop">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="2">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="BufferPoolPrivate" c:type="GstBufferPoolPrivate" disguised="1"/>
<enumeration name="BufferingMode" glib:type-name="GstBufferingMode" glib:get-type="gst_buffering_mode_get_type" c:type="GstBufferingMode">
<doc xml:space="preserve">The different types of buffering methods.</doc>
<member name="stream" value="0" c:identifier="GST_BUFFERING_STREAM" glib:nick="stream">
<doc xml:space="preserve">a small amount of data is buffered</doc>
</member>
<member name="download" value="1" c:identifier="GST_BUFFERING_DOWNLOAD" glib:nick="download">
<doc xml:space="preserve">the stream is being downloaded</doc>
</member>
<member name="timeshift" value="2" c:identifier="GST_BUFFERING_TIMESHIFT" glib:nick="timeshift">
<doc xml:space="preserve">the stream is being downloaded in a ringbuffer</doc>
</member>
<member name="live" value="3" c:identifier="GST_BUFFERING_LIVE" glib:nick="live">
<doc xml:space="preserve">the stream is a live stream</doc>
</member>
</enumeration>
<class name="Bus" c:symbol-prefix="bus" c:type="GstBus" parent="Object" glib:type-name="GstBus" glib:get-type="gst_bus_get_type" glib:type-struct="BusClass">
<doc xml:space="preserve">The #GstBus is an object responsible for delivering #GstMessage packets in
a first-in first-out way from the streaming threads (see #GstTask) to the
application.
Since the application typically only wants to deal with delivery of these
messages from one thread, the GstBus will marshall the messages between
different threads. This is important since the actual streaming of media
is done in another thread than the application.
The GstBus provides support for #GSource based notifications. This makes it
possible to handle the delivery in the glib mainloop.
The #GSource callback function gst_bus_async_signal_func() can be used to
convert all bus messages into signal emissions.
A message is posted on the bus with the gst_bus_post() method. With the
gst_bus_peek() and gst_bus_pop() methods one can look at or retrieve a
previously posted message.
The bus can be polled with the gst_bus_poll() method. This methods blocks
up to the specified timeout value until one of the specified messages types
is posted on the bus. The application can then gst_bus_pop() the messages
from the bus to handle them.
Alternatively the application can register an asynchronous bus function
using gst_bus_add_watch_full() or gst_bus_add_watch(). This function will
install a #GSource in the default glib main loop and will deliver messages
a short while after they have been posted. Note that the main loop should
be running for the asynchronous callbacks.
It is also possible to get messages from the bus without any thread
marshalling with the gst_bus_set_sync_handler() method. This makes it
possible to react to a message in the same thread that posted the
message on the bus. This should only be used if the application is able
to deal with messages from different threads.
Every #GstPipeline has one bus.
Note that a #GstPipeline will set its bus into flushing state when changing
from READY to NULL state.</doc>
<constructor name="new" c:identifier="gst_bus_new">
<doc xml:space="preserve">Creates a new #GstBus instance.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstBus instance</doc>
<type name="Bus" c:type="GstBus*"/>
</return-value>
</constructor>
<virtual-method name="message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="sync_message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</virtual-method>
<method name="add_signal_watch" c:identifier="gst_bus_add_signal_watch">
<doc xml:space="preserve">Adds a bus signal watch to the default main context with the default priority
(%G_PRIORITY_DEFAULT). It is also possible to use a non-default
main context set up using g_main_context_push_thread_default() (before
one had to create a bus watch source and attach it to the desired main
context 'manually').
After calling this statement, the bus will emit the "message" signal for each
message posted on the bus.
This function may be called multiple times. To clean up, the caller is
responsible for calling gst_bus_remove_signal_watch() as many times as this
function is called.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus on which you want to receive the "message" signal</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="add_signal_watch_full" c:identifier="gst_bus_add_signal_watch_full">
<doc xml:space="preserve">Adds a bus signal watch to the default main context with the given @priority
(e.g. %G_PRIORITY_DEFAULT). It is also possible to use a non-default main
context set up using g_main_context_push_thread_default()
(before one had to create a bus watch source and attach it to the desired
main context 'manually').
After calling this statement, the bus will emit the "message" signal for each
message posted on the bus when the main loop is running.
This function may be called multiple times. To clean up, the caller is
responsible for calling gst_bus_remove_signal_watch() as many times as this
function is called.
There can only be a single bus watch per bus, you must remove any signal
watch before you can set another type of watch.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus on which you want to receive the "message" signal</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="priority" transfer-ownership="none">
<doc xml:space="preserve">The priority of the watch.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="add_watch" c:identifier="gst_bus_add_watch" shadowed-by="add_watch_full" introspectable="0">
<doc xml:space="preserve">Adds a bus watch to the default main context with the default priority
(%G_PRIORITY_DEFAULT). It is also possible to use a non-default main
context set up using g_main_context_push_thread_default() (before
one had to create a bus watch source and attach it to the desired main
context 'manually').
This function is used to receive asynchronous messages in the main loop.
There can only be a single bus watch per bus, you must remove it before you
can set a new one.
The bus watch will only work if a GLib main loop is being run.
The watch can be removed using gst_bus_remove_watch() or by returning %FALSE
from @func. If the watch was added to the default main context it is also
possible to remove the watch using g_source_remove().
The bus watch will take its own reference to the @bus, so it is safe to unref
@bus using gst_object_unref() after setting the bus watch.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The event source id or 0 if @bus already got an event source.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to create the watch for</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" closure="1">
<doc xml:space="preserve">A function to call when a message is received.</doc>
<type name="BusFunc" c:type="GstBusFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="add_watch_full" c:identifier="gst_bus_add_watch_full" shadows="add_watch">
<doc xml:space="preserve">Adds a bus watch to the default main context with the given @priority (e.g.
%G_PRIORITY_DEFAULT). It is also possible to use a non-default main
context set up using g_main_context_push_thread_default() (before
one had to create a bus watch source and attach it to the desired main
context 'manually').
This function is used to receive asynchronous messages in the main loop.
There can only be a single bus watch per bus, you must remove it before you
can set a new one.
The bus watch will only work if a GLib main loop is being run.
When @func is called, the message belongs to the caller; if you want to
keep a copy of it, call gst_message_ref() before leaving @func.
The watch can be removed using gst_bus_remove_watch() or by returning %FALSE
from @func. If the watch was added to the default main context it is also
possible to remove the watch using g_source_remove().
The bus watch will take its own reference to the @bus, so it is safe to unref
@bus using gst_object_unref() after setting the bus watch.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The event source id or 0 if @bus already got an event source.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to create the watch for.</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="priority" transfer-ownership="none">
<doc xml:space="preserve">The priority of the watch.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="2" destroy="3">
<doc xml:space="preserve">A function to call when a message is received.</doc>
<type name="BusFunc" c:type="GstBusFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">the function to call when the source is removed.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="async_signal_func" c:identifier="gst_bus_async_signal_func">
<doc xml:space="preserve">A helper #GstBusFunc that can be used to convert all asynchronous messages
into signals.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessage received</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="create_watch" c:identifier="gst_bus_create_watch">
<doc xml:space="preserve">Create watch for this bus. The GSource will be dispatched whenever
a message is on the bus. After the GSource is dispatched, the
message is popped off the bus and unreffed.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GSource that can be added to a mainloop.</doc>
<type name="GLib.Source" c:type="GSource*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to create the watch for</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="disable_sync_message_emission" c:identifier="gst_bus_disable_sync_message_emission">
<doc xml:space="preserve">Instructs GStreamer to stop emitting the "sync-message" signal for this bus.
See gst_bus_enable_sync_message_emission() for more information.
In the event that multiple pieces of code have called
gst_bus_enable_sync_message_emission(), the sync-message emissions will only
be stopped after all calls to gst_bus_enable_sync_message_emission() were
"cancelled" by calling this function. In this way the semantics are exactly
the same as gst_object_ref() that which calls enable should also call
disable.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus on which you previously called
gst_bus_enable_sync_message_emission()</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="enable_sync_message_emission" c:identifier="gst_bus_enable_sync_message_emission">
<doc xml:space="preserve">Instructs GStreamer to emit the "sync-message" signal after running the bus's
sync handler. This function is here so that code can ensure that they can
synchronously receive messages without having to affect what the bin's sync
handler is.
This function may be called multiple times. To clean up, the caller is
responsible for calling gst_bus_disable_sync_message_emission() as many times
as this function is called.
While this function looks similar to gst_bus_add_signal_watch(), it is not
exactly the same -- this function enables *synchronous* emission of
signals when messages arrive; gst_bus_add_signal_watch() adds an idle callback
to pop messages off the bus *asynchronously*. The sync-message signal
comes from the thread of whatever object posted the message; the "message"
signal is marshalled to the main thread via the main loop.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus on which you want to receive the "sync-message" signal</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_pollfd" c:identifier="gst_bus_get_pollfd" version="1.14">
<doc xml:space="preserve">Gets the file descriptor from the bus which can be used to get notified about
messages being available with functions like g_poll(), and allows integration
into other event loops based on file descriptors.
Whenever a message is available, the POLLIN / %G_IO_IN event is set.
Warning: NEVER read or write anything to the returned fd but only use it
for getting notifications via g_poll() or similar and then use the normal
GstBus API, e.g. gst_bus_pop().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">A #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="fd" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">A GPollFD to fill</doc>
<type name="GLib.PollFD" c:type="GPollFD*"/>
</parameter>
</parameters>
</method>
<method name="have_pending" c:identifier="gst_bus_have_pending">
<doc xml:space="preserve">Check if there are pending messages on the bus that
should be handled.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if there are messages on the bus to be handled, %FALSE
otherwise.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to check</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="peek" c:identifier="gst_bus_peek">
<doc xml:space="preserve">Peek the message on the top of the bus' queue. The message will remain
on the bus' message queue. A reference is returned, and needs to be unreffed
by the caller.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstMessage that is on the
bus, or %NULL if the bus is empty.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="poll" c:identifier="gst_bus_poll">
<doc xml:space="preserve">Poll the bus for messages. Will block while waiting for messages to come.
You can specify a maximum time to poll with the @timeout parameter. If
@timeout is negative, this function will block indefinitely.
All messages not in @events will be popped off the bus and will be ignored.
It is not possible to use message enums beyond #GST_MESSAGE_EXTENDED in the
@events mask
Because poll is implemented using the "message" signal enabled by
gst_bus_add_signal_watch(), calling gst_bus_poll() will cause the "message"
signal to be emitted for every message that poll sees. Thus a "message"
signal handler will see the same messages that this function sees -- neither
will steal messages from the other.
This function will run a main loop from the default main context when
polling.
You should never use this function, since it is pure evil. This is
especially true for GUI applications based on Gtk+ or Qt, but also for any
other non-trivial application that uses the GLib main loop. As this function
runs a GLib main loop, any callback attached to the default GLib main
context may be invoked. This could be timeouts, GUI events, I/O events etc.;
even if gst_bus_poll() is called with a 0 timeout. Any of these callbacks
may do things you do not expect, e.g. destroy the main application window or
some other resource; change other application state; display a dialog and
run another main loop until the user clicks it away. In short, using this
function may add a lot of complexity to your code through unexpected
re-entrancy and unexpected changes to your application's state.
For 0 timeouts use gst_bus_pop_filtered() instead of this function; for
other short timeouts use gst_bus_timed_pop_filtered(); everything else is
better handled by setting up an asynchronous bus watch and doing things
from there.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the message that was received,
or %NULL if the poll timed out. The message is taken from the
bus and needs to be unreffed with gst_message_unref() after
usage.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="events" transfer-ownership="none">
<doc xml:space="preserve">a mask of #GstMessageType, representing the set of message types to
poll for (note special handling of extended message types below)</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">the poll timeout, as a #GstClockTime, or #GST_CLOCK_TIME_NONE to poll
indefinitely.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="pop" c:identifier="gst_bus_pop">
<doc xml:space="preserve">Get a message from the bus.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstMessage that is on the
bus, or %NULL if the bus is empty. The message is taken from
the bus and needs to be unreffed with gst_message_unref() after
usage.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to pop</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="pop_filtered" c:identifier="gst_bus_pop_filtered">
<doc xml:space="preserve">Get a message matching @type from the bus. Will discard all messages on
the bus that do not match @type and that have been posted before the first
message that does match @type. If there is no message matching @type on
the bus, all messages will be discarded. It is not possible to use message
enums beyond #GST_MESSAGE_EXTENDED in the @events mask.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the next #GstMessage matching
@type that is on the bus, or %NULL if the bus is empty or there
is no message matching @type. The message is taken from the bus
and needs to be unreffed with gst_message_unref() after usage.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to pop</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="types" transfer-ownership="none">
<doc xml:space="preserve">message types to take into account</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</method>
<method name="post" c:identifier="gst_bus_post">
<doc xml:space="preserve">Post a message on the given bus. Ownership of the message
is taken by the bus.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the message could be posted, %FALSE if the bus is flushing.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to post on</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="full">
<doc xml:space="preserve">the #GstMessage to post</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</method>
<method name="remove_signal_watch" c:identifier="gst_bus_remove_signal_watch">
<doc xml:space="preserve">Removes a signal watch previously added with gst_bus_add_signal_watch().
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus you previously added a signal watch to</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_watch" c:identifier="gst_bus_remove_watch" version="1.6">
<doc xml:space="preserve">Removes an installed bus watch from @bus.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success or %FALSE if @bus has no event source.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to remove the watch from.</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_flushing" c:identifier="gst_bus_set_flushing">
<doc xml:space="preserve">If @flushing, flush out and unref any messages queued in the bus. Releases
references to the message origin objects. Will flush future messages until
gst_bus_set_flushing() sets @flushing to %FALSE.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="flushing" transfer-ownership="none">
<doc xml:space="preserve">whether or not to flush the bus</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_sync_handler" c:identifier="gst_bus_set_sync_handler">
<doc xml:space="preserve">Sets the synchronous handler on the bus. The function will be called
every time a new message is posted on the bus. Note that the function
will be called in the same thread context as the posting object. This
function is usually only called by the creator of the bus. Applications
should handle messages asynchronously using the gst_bus watch and poll
functions.
Before 1.16.3 it was not possible to replace an existing handler and
clearing an existing handler with %NULL was not thread-safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to install the handler on</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" nullable="1" allow-none="1" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">The handler function to install</doc>
<type name="BusSyncHandler" c:type="GstBusSyncHandler"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">User data that will be sent to the handler function.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">called when @user_data becomes unused</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="sync_signal_handler" c:identifier="gst_bus_sync_signal_handler">
<doc xml:space="preserve">A helper GstBusSyncHandler that can be used to convert all synchronous
messages into signals.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">GST_BUS_PASS</doc>
<type name="BusSyncReply" c:type="GstBusSyncReply"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessage received</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="timed_pop" c:identifier="gst_bus_timed_pop">
<doc xml:space="preserve">Get a message from the bus, waiting up to the specified timeout.
If @timeout is 0, this function behaves like gst_bus_pop(). If @timeout is
#GST_CLOCK_TIME_NONE, this function will block forever until a message was
posted on the bus.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstMessage that is on the
bus after the specified timeout or %NULL if the bus is empty
after the timeout expired. The message is taken from the bus
and needs to be unreffed with gst_message_unref() after usage.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to pop</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a timeout</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="timed_pop_filtered" c:identifier="gst_bus_timed_pop_filtered">
<doc xml:space="preserve">Get a message from the bus whose type matches the message type mask @types,
waiting up to the specified timeout (and discarding any messages that do not
match the mask provided).
If @timeout is 0, this function behaves like gst_bus_pop_filtered(). If
@timeout is #GST_CLOCK_TIME_NONE, this function will block forever until a
matching message was posted on the bus.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstMessage matching the
filter in @types, or %NULL if no matching message was found on
the bus until the timeout expired. The message is taken from
the bus and needs to be unreffed with gst_message_unref() after
usage.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">a #GstBus to pop from</doc>
<type name="Bus" c:type="GstBus*"/>
</instance-parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a timeout in nanoseconds, or GST_CLOCK_TIME_NONE to wait forever</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="types" transfer-ownership="none">
<doc xml:space="preserve">message types to take into account, GST_MESSAGE_ANY for any type</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</method>
<property name="enable-async" readable="0" writable="1" construct-only="1" transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</property>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="BusPrivate" c:type="GstBusPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="message" when="last" detailed="1">
<doc xml:space="preserve">A message has been posted on the bus. This signal is emitted from a
GSource added to the mainloop. this signal will only be emitted when
there is a mainloop running.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the message that has been posted asynchronously</doc>
<type name="Message"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="sync-message" when="last" detailed="1">
<doc xml:space="preserve">A message has been posted on the bus. This signal is emitted from the
thread that posted the message so one has to be careful with locking.
This signal will not be emitted by default, you have to call
gst_bus_enable_sync_message_emission() before.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the message that has been posted synchronously</doc>
<type name="Message"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="BusClass" c:type="GstBusClass" glib:is-gtype-struct-for="Bus">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="message">
<callback name="message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bus" transfer-ownership="none">
<type name="Bus" c:type="GstBus*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="sync_message">
<callback name="sync_message">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bus" transfer-ownership="none">
<type name="Bus" c:type="GstBus*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="BusFlags" glib:type-name="GstBusFlags" glib:get-type="gst_bus_flags_get_type" c:type="GstBusFlags">
<doc xml:space="preserve">The standard flags that a bus may have.</doc>
<member name="flushing" value="16" c:identifier="GST_BUS_FLUSHING" glib:nick="flushing">
<doc xml:space="preserve">The bus is currently dropping all messages</doc>
</member>
<member name="flag_last" value="32" c:identifier="GST_BUS_FLAG_LAST" glib:nick="flag-last">
<doc xml:space="preserve">offset to define more flags</doc>
</member>
</bitfield>
<callback name="BusFunc" c:type="GstBusFunc">
<doc xml:space="preserve">Specifies the type of function passed to gst_bus_add_watch() or
gst_bus_add_watch_full(), which is called from the mainloop when a message
is available on the bus.
The message passed to the function will be unreffed after execution of this
function so it should not be freed in the function.
Note that this function is used as a GSourceFunc which means that returning
%FALSE will remove the GSource from the mainloop.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if the event source should be removed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">the #GstBus that sent the message</doc>
<type name="Bus" c:type="GstBus*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data that has been given, when registering the handler</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="BusPrivate" c:type="GstBusPrivate" disguised="1"/>
<callback name="BusSyncHandler" c:type="GstBusSyncHandler">
<doc xml:space="preserve">Handler will be invoked synchronously, when a new message has been injected
into the bus. This function is mostly used internally. Only one sync handler
can be attached to a given bus.
If the handler returns GST_BUS_DROP, it should unref the message, else the
message should not be unreffed by the sync handler.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">#GstBusSyncReply stating what to do with the message</doc>
<type name="BusSyncReply" c:type="GstBusSyncReply"/>
</return-value>
<parameters>
<parameter name="bus" transfer-ownership="none">
<doc xml:space="preserve">the #GstBus that sent the message</doc>
<type name="Bus" c:type="GstBus*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data that has been given, when registering the handler</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<enumeration name="BusSyncReply" glib:type-name="GstBusSyncReply" glib:get-type="gst_bus_sync_reply_get_type" c:type="GstBusSyncReply">
<doc xml:space="preserve">The result values for a GstBusSyncHandler.</doc>
<member name="drop" value="0" c:identifier="GST_BUS_DROP" glib:nick="drop">
<doc xml:space="preserve">drop the message</doc>
</member>
<member name="pass" value="1" c:identifier="GST_BUS_PASS" glib:nick="pass">
<doc xml:space="preserve">pass the message to the async queue</doc>
</member>
<member name="async" value="2" c:identifier="GST_BUS_ASYNC" glib:nick="async">
<doc xml:space="preserve">pass message to async queue, continue if message is handled</doc>
</member>
</enumeration>
<function-macro name="CALL_PARENT" c:identifier="GST_CALL_PARENT" introspectable="0">
<doc xml:space="preserve">Just call the parent handler. This assumes that there is a variable
named parent_class that points to the (duh!) parent class. Note that
this macro is not to be used with things that return something, use
the _WITH_DEFAULT version for that</doc>
<parameters>
<parameter name="parent_class_cast">
<doc xml:space="preserve">the name of the class cast macro for the parent type</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">name of the function to call</doc>
</parameter>
<parameter name="args">
<doc xml:space="preserve">arguments enclosed in '( )'</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CALL_PARENT_WITH_DEFAULT" c:identifier="GST_CALL_PARENT_WITH_DEFAULT" introspectable="0">
<doc xml:space="preserve">Same as GST_CALL_PARENT(), but in case there is no implementation, it
evaluates to @def_return.</doc>
<parameters>
<parameter name="parent_class_cast">
<doc xml:space="preserve">the name of the class cast macro for the parent type</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">name of the function to call</doc>
</parameter>
<parameter name="args">
<doc xml:space="preserve">arguments enclosed in '( )'</doc>
</parameter>
<parameter name="def_return">
<doc xml:space="preserve">default result</doc>
</parameter>
</parameters>
</function-macro>
<constant name="CAN_INLINE" value="1" c:type="GST_CAN_INLINE">
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="CAPS" c:identifier="GST_CAPS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_CAST" c:identifier="GST_CAPS_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_FEATURES" c:identifier="GST_CAPS_FEATURES" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_FEATURES_CAST" c:identifier="GST_CAPS_FEATURES_CAST" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<constant name="CAPS_FEATURE_MEMORY_SYSTEM_MEMORY" value="memory:SystemMemory" c:type="GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY">
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="CAPS_FLAGS" c:identifier="GST_CAPS_FLAGS" introspectable="0">
<doc xml:space="preserve">A flags word containing #GstCapsFlags flags set on this caps.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_FLAG_IS_SET" c:identifier="GST_CAPS_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">Gives the status of a specific flag on a caps.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstCapsFlags to check.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_FLAG_SET" c:identifier="GST_CAPS_FLAG_SET" introspectable="0">
<doc xml:space="preserve">Sets a caps flag on a caps.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstCapsFlags to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_FLAG_UNSET" c:identifier="GST_CAPS_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">Clears a caps flag.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstCapsFlags to clear.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_IS_SIMPLE" c:identifier="GST_CAPS_IS_SIMPLE" introspectable="0">
<doc xml:space="preserve">Convenience macro that checks if the number of structures in the given caps
is exactly one.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">the #GstCaps instance to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_REFCOUNT" c:identifier="GST_CAPS_REFCOUNT" introspectable="0">
<doc xml:space="preserve">Get access to the reference count field of the caps</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAPS_REFCOUNT_VALUE" c:identifier="GST_CAPS_REFCOUNT_VALUE" introspectable="0">
<doc xml:space="preserve">Get the reference count value of the caps.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAT_MEMDUMP" c:identifier="GST_CAT_MEMDUMP" introspectable="0">
<doc xml:space="preserve">Output a hexdump of @data in the given category.
There is no need to finish the end of the message string with a newline
character, a newline character will be added automatically.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">category to use</doc>
</parameter>
<parameter name="msg">
<doc xml:space="preserve">message string to log with the data</doc>
</parameter>
<parameter name="data">
<doc xml:space="preserve">pointer to the data to output</doc>
</parameter>
<parameter name="length">
<doc xml:space="preserve">length of the data to output</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CAT_MEMDUMP_OBJECT" c:identifier="GST_CAT_MEMDUMP_OBJECT" introspectable="0">
<doc xml:space="preserve">Output a hexdump of @data relating to the given object in the given
category.
There is no need to finish the end of the message string with a newline
character, a newline character will be added automatically.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">category to use</doc>
</parameter>
<parameter name="obj">
<doc xml:space="preserve">the #GObject the message belongs to</doc>
</parameter>
<parameter name="msg">
<doc xml:space="preserve">message string to log with the data</doc>
</parameter>
<parameter name="data">
<doc xml:space="preserve">pointer to the data to output</doc>
</parameter>
<parameter name="length">
<doc xml:space="preserve">length of the data to output</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CHECK_VERSION" c:identifier="GST_CHECK_VERSION" introspectable="0">
<doc xml:space="preserve">Check whether a GStreamer version equal to or greater than
major.minor.micro is present.</doc>
<parameters>
<parameter name="major">
<doc xml:space="preserve">a number indicating the major version</doc>
</parameter>
<parameter name="minor">
<doc xml:space="preserve">a number indicating the minor version</doc>
</parameter>
<parameter name="micro">
<doc xml:space="preserve">a number indicating the micro version</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CHILD_PROXY" c:identifier="GST_CHILD_PROXY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CHILD_PROXY_GET_INTERFACE" c:identifier="GST_CHILD_PROXY_GET_INTERFACE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK" c:identifier="GST_CLOCK" introspectable="0">
<parameters>
<parameter name="clock">
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_CAST" c:identifier="GST_CLOCK_CAST" introspectable="0">
<parameters>
<parameter name="clock">
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_CLASS" c:identifier="GST_CLOCK_CLASS" introspectable="0">
<parameters>
<parameter name="cclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_DIFF" c:identifier="GST_CLOCK_DIFF" introspectable="0">
<doc xml:space="preserve">Calculate a difference between two clock times as a #GstClockTimeDiff.
The difference is calculated as @e - @s.</doc>
<parameters>
<parameter name="s">
<doc xml:space="preserve">the first time</doc>
</parameter>
<parameter name="e">
<doc xml:space="preserve">the second time</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY" c:identifier="GST_CLOCK_ENTRY" introspectable="0">
<doc xml:space="preserve">Cast to a clock entry</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to cast</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY_CLOCK" c:identifier="GST_CLOCK_ENTRY_CLOCK" introspectable="0" deprecated="1">
<doc xml:space="preserve">Get the owner clock of the entry</doc>
<doc-deprecated xml:space="preserve">Use gst_clock_id_get_clock() instead.</doc-deprecated>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY_INTERVAL" c:identifier="GST_CLOCK_ENTRY_INTERVAL" introspectable="0">
<doc xml:space="preserve">Get the interval of this periodic entry</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY_STATUS" c:identifier="GST_CLOCK_ENTRY_STATUS" introspectable="0">
<doc xml:space="preserve">The status of the entry</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY_TIME" c:identifier="GST_CLOCK_ENTRY_TIME" introspectable="0">
<doc xml:space="preserve">Get the requested time of this entry</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_ENTRY_TYPE" c:identifier="GST_CLOCK_ENTRY_TYPE" introspectable="0">
<doc xml:space="preserve">Get the type of the clock entry</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">the entry to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_FLAGS" c:identifier="GST_CLOCK_FLAGS" introspectable="0">
<doc xml:space="preserve">Gets the #GstClockFlags clock flags.</doc>
<parameters>
<parameter name="clock">
<doc xml:space="preserve">the clock to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_GET_CLASS" c:identifier="GST_CLOCK_GET_CLASS" introspectable="0">
<parameters>
<parameter name="clock">
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_STIME_IS_VALID" c:identifier="GST_CLOCK_STIME_IS_VALID" version="1.6" introspectable="0">
<doc xml:space="preserve">Tests if a given #GstClockTimeDiff of #gint64 represents a valid defined time.</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">signed clock time to validate</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="CLOCK_TIME_IS_VALID" c:identifier="GST_CLOCK_TIME_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if a given #GstClockTime represents a valid defined time.</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">clock time to validate</doc>
</parameter>
</parameters>
</function-macro>
<constant name="CLOCK_TIME_NONE" value="18446744073709551615" c:type="GST_CLOCK_TIME_NONE">
<doc xml:space="preserve">Constant to define an undefined clock time.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</constant>
<function-macro name="CONTEXT" c:identifier="GST_CONTEXT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTEXT_CAST" c:identifier="GST_CONTEXT_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_BINDING" c:identifier="GST_CONTROL_BINDING" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_BINDING_CLASS" c:identifier="GST_CONTROL_BINDING_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_BINDING_GET_CLASS" c:identifier="GST_CONTROL_BINDING_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_BINDING_PSPEC" c:identifier="GST_CONTROL_BINDING_PSPEC" introspectable="0">
<parameters>
<parameter name="cb">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_SOURCE" c:identifier="GST_CONTROL_SOURCE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_SOURCE_CLASS" c:identifier="GST_CONTROL_SOURCE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="CONTROL_SOURCE_GET_CLASS" c:identifier="GST_CONTROL_SOURCE_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<record name="Caps" c:type="GstCaps" glib:type-name="GstCaps" glib:get-type="gst_caps_get_type" c:symbol-prefix="caps">
<doc xml:space="preserve">Caps (capabilities) are lightweight refcounted objects describing media types.
They are composed of an array of #GstStructure.
Caps are exposed on #GstPadTemplate to describe all possible types a
given pad can handle. They are also stored in the #GstRegistry along with
a description of the #GstElement.
Caps are exposed on the element pads using the gst_pad_query_caps() pad
function. This function describes the possible types that the pad can
handle or produce at runtime.
A #GstCaps can be constructed with the following code fragment:
|[&lt;!-- language="C" --&gt;
GstCaps *caps = gst_caps_new_simple ("video/x-raw",
"format", G_TYPE_STRING, "I420",
"framerate", GST_TYPE_FRACTION, 25, 1,
"pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
"width", G_TYPE_INT, 320,
"height", G_TYPE_INT, 240,
NULL);
]|
A #GstCaps is fixed when it has no properties with ranges or lists. Use
gst_caps_is_fixed() to test for fixed caps. Fixed caps can be used in a
caps event to notify downstream elements of the current media type.
Various methods exist to work with the media types such as subtracting
or intersecting.
Be aware that the current #GstCaps / #GstStructure serialization into string
has limited support for nested #GstCaps / #GstStructure fields. It can only
support one level of nesting. Using more levels will lead to unexpected
behavior when using serialization features, such as gst_caps_to_string() or
gst_value_serialize() and their counterparts.</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">the parent type</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<constructor name="new_any" c:identifier="gst_caps_new_any">
<doc xml:space="preserve">Creates a new #GstCaps that indicates that it is compatible with
any media format.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
</constructor>
<constructor name="new_empty" c:identifier="gst_caps_new_empty">
<doc xml:space="preserve">Creates a new #GstCaps that is empty. That is, the returned
#GstCaps contains no media formats.
The #GstCaps is guaranteed to be writable.
Caller is responsible for unreffing the returned caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
</constructor>
<constructor name="new_empty_simple" c:identifier="gst_caps_new_empty_simple">
<doc xml:space="preserve">Creates a new #GstCaps that contains one #GstStructure with name
@media_type.
Caller is responsible for unreffing the returned caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="media_type" transfer-ownership="none">
<doc xml:space="preserve">the media type of the structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_full" c:identifier="gst_caps_new_full" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCaps and adds all the structures listed as
arguments. The list must be %NULL-terminated. The structures
are not copied; the returned #GstCaps owns the structures.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="struct1" transfer-ownership="none">
<doc xml:space="preserve">the first structure to add</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional structures to add</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_full_valist" c:identifier="gst_caps_new_full_valist" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCaps and adds all the structures listed as
arguments. The list must be %NULL-terminated. The structures
are not copied; the returned #GstCaps owns the structures.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">the first structure to add</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">additional structures to add</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_simple" c:identifier="gst_caps_new_simple" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCaps that contains one #GstStructure. The
structure is defined by the arguments, which have the same format
as gst_structure_new().
Caller is responsible for unreffing the returned caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="media_type" transfer-ownership="none">
<doc xml:space="preserve">the media type of the structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">first field to set</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional arguments</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<method name="append" c:identifier="gst_caps_append">
<doc xml:space="preserve">Appends the structures contained in @caps2 to @caps1. The structures in
@caps2 are not copied -- they are transferred to @caps1, and then @caps2 is
freed. If either caps is ANY, the resulting caps will be ANY.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps that will be appended to</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps to append</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="append_structure" c:identifier="gst_caps_append_structure">
<doc xml:space="preserve">Appends @structure to @caps. The structure is not copied; @caps
becomes the owner of @structure.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps that will be appended to</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the #GstStructure to append</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="append_structure_full" c:identifier="gst_caps_append_structure_full" version="1.2">
<doc xml:space="preserve">Appends @structure with @features to @caps. The structure is not copied; @caps
becomes the owner of @structure.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps that will be appended to</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the #GstStructure to append</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="features" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCapsFeatures to append</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="can_intersect" c:identifier="gst_caps_can_intersect">
<doc xml:space="preserve">Tries intersecting @caps1 and @caps2 and reports whether the result would not
be empty</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if intersection would be not empty</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_caps_copy">
<doc xml:space="preserve">Creates a new #GstCaps as a copy of the old @caps. The new caps will have a
refcount of 1, owned by the caller. The structures are copied as well.
Note that this function is the semantic equivalent of a gst_caps_ref()
followed by a gst_caps_make_writable(). If you only want to hold on to a
reference to the data, you should use gst_caps_ref().
When you are finished with the caps, call gst_caps_unref() on it.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps.</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_nth" c:identifier="gst_caps_copy_nth" version="1.16">
<doc xml:space="preserve">Creates a new #GstCaps and appends a copy of the nth structure
contained in @caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to copy</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="nth" transfer-ownership="none">
<doc xml:space="preserve">the nth structure to copy</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="filter_and_map_in_place" c:identifier="gst_caps_filter_and_map_in_place" version="1.6">
<doc xml:space="preserve">Calls the provided function once for each structure and caps feature in the
#GstCaps. In contrast to gst_caps_foreach(), the function may modify the
structure and features. In contrast to gst_caps_filter_and_map_in_place(),
the structure and features are removed from the caps if %FALSE is returned
from the function.
The caps must be mutable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="CapsFilterMapFunc" c:type="GstCapsFilterMapFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="fixate" c:identifier="gst_caps_fixate">
<doc xml:space="preserve">Modifies the given @caps into a representation with only fixed
values. First the caps will be truncated and then the first structure will be
fixated with gst_structure_fixate().
This function takes ownership of @caps and will call gst_caps_make_writable()
on it so you must not use @caps afterwards unless you keep an additional
reference to it with gst_caps_ref().
Note that it is not guaranteed that the returned caps have exactly one
structure. If @caps are empty caps then then returned caps will be
the empty too and contain no structure at all.
Calling this function with any caps is not allowed.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the fixated caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">a #GstCaps to fixate</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="foreach" c:identifier="gst_caps_foreach" version="1.6">
<doc xml:space="preserve">Calls the provided function once for each structure and caps feature in the
#GstCaps. The function must not modify the fields.
Also see gst_caps_map_in_place() and gst_caps_filter_and_map_in_place().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the supplied function returns %TRUE for each call,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="CapsForeachFunc" c:type="GstCapsForeachFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get_features" c:identifier="gst_caps_get_features" version="1.2">
<doc xml:space="preserve">Finds the features in @caps that has the index @index, and
returns it.
WARNING: This function takes a const GstCaps *, but returns a
non-const GstCapsFeatures *. This is for programming convenience --
the caller should be aware that structures inside a constant
#GstCaps should not be modified. However, if you know the caps
are writable, either because you have just copied them or made
them writable with gst_caps_make_writable(), you may modify the
features returned in the usual way, e.g. with functions like
gst_caps_features_add().
You do not need to free or unref the structure returned, it
belongs to the #GstCaps.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer to the #GstCapsFeatures
corresponding to @index</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the index of the structure</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_size" c:identifier="gst_caps_get_size">
<doc xml:space="preserve">Gets the number of structures contained in @caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of structures that @caps contains</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_structure" c:identifier="gst_caps_get_structure">
<doc xml:space="preserve">Finds the structure in @caps that has the index @index, and
returns it.
WARNING: This function takes a const GstCaps *, but returns a
non-const GstStructure *. This is for programming convenience --
the caller should be aware that structures inside a constant
#GstCaps should not be modified. However, if you know the caps
are writable, either because you have just copied them or made
them writable with gst_caps_make_writable(), you may modify the
structure returned in the usual way, e.g. with functions like
gst_structure_set().
You do not need to free or unref the structure returned, it
belongs to the #GstCaps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a pointer to the #GstStructure corresponding
to @index</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the index of the structure</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="intersect" c:identifier="gst_caps_intersect">
<doc xml:space="preserve">Creates a new #GstCaps that contains all the formats that are common
to both @caps1 and @caps2. Defaults to %GST_CAPS_INTERSECT_ZIG_ZAG mode.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="intersect_full" c:identifier="gst_caps_intersect_full">
<doc xml:space="preserve">Creates a new #GstCaps that contains all the formats that are common
to both @caps1 and @caps2, the order is defined by the #GstCapsIntersectMode
used.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to intersect</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">The intersection algorithm/mode to use</doc>
<type name="CapsIntersectMode" c:type="GstCapsIntersectMode"/>
</parameter>
</parameters>
</method>
<method name="is_always_compatible" c:identifier="gst_caps_is_always_compatible">
<doc xml:space="preserve">A given #GstCaps structure is always compatible with another if
every media format that is in the first is also contained in the
second. That is, @caps1 is a subset of @caps2.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @caps1 is a subset of @caps2.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="is_any" c:identifier="gst_caps_is_any">
<doc xml:space="preserve">Determines if @caps represents any media format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @caps represents any format.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_empty" c:identifier="gst_caps_is_empty">
<doc xml:space="preserve">Determines if @caps represents no media formats.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @caps represents no formats.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_equal" c:identifier="gst_caps_is_equal">
<doc xml:space="preserve">Checks if the given caps represent the same set of caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if both caps are equal.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">another #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="is_equal_fixed" c:identifier="gst_caps_is_equal_fixed">
<doc xml:space="preserve">Tests if two #GstCaps are equal. This function only works on fixed
#GstCaps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the arguments represent the same format</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="is_fixed" c:identifier="gst_caps_is_fixed">
<doc xml:space="preserve">Fixed #GstCaps describe exactly one format, that is, they have exactly
one structure, and each field in the structure describes a fixed type.
Examples of non-fixed types are GST_TYPE_INT_RANGE and GST_TYPE_LIST.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @caps is fixed</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to test</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_strictly_equal" c:identifier="gst_caps_is_strictly_equal">
<doc xml:space="preserve">Checks if the given caps are exactly the same set of caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if both caps are strictly equal.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="none">
<doc xml:space="preserve">another #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="is_subset" c:identifier="gst_caps_is_subset">
<doc xml:space="preserve">Checks if all caps represented by @subset are also represented by @superset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @subset is a subset of @superset</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="subset" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="superset" transfer-ownership="none">
<doc xml:space="preserve">a potentially greater #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="is_subset_structure" c:identifier="gst_caps_is_subset_structure">
<doc xml:space="preserve">Checks if @structure is a subset of @caps. See gst_caps_is_subset()
for more information.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @structure is a subset of @caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a potential #GstStructure subset of @caps</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="is_subset_structure_full" c:identifier="gst_caps_is_subset_structure_full" version="1.2">
<doc xml:space="preserve">Checks if @structure is a subset of @caps. See gst_caps_is_subset()
for more information.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @structure is a subset of @caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a potential #GstStructure subset of @caps</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
<parameter name="features" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstCapsFeatures for @structure</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="map_in_place" c:identifier="gst_caps_map_in_place" version="1.6">
<doc xml:space="preserve">Calls the provided function once for each structure and caps feature in the
#GstCaps. In contrast to gst_caps_foreach(), the function may modify but not
delete the structures and features. The caps must be mutable.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the supplied function returns %TRUE for each call,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="CapsMapFunc" c:type="GstCapsMapFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="merge" c:identifier="gst_caps_merge">
<doc xml:space="preserve">Appends the structures contained in @caps2 to @caps1 if they are not yet
expressed by @caps1. The structures in @caps2 are not copied -- they are
transferred to a writable copy of @caps1, and then @caps2 is freed.
If either caps is ANY, the resulting caps will be ANY.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the merged caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps1" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps that will take the new entries</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="caps2" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps to merge in</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="merge_structure" c:identifier="gst_caps_merge_structure">
<doc xml:space="preserve">Appends @structure to @caps if its not already expressed by @caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the merged caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps to merge into</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the #GstStructure to merge</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="merge_structure_full" c:identifier="gst_caps_merge_structure_full" version="1.2">
<doc xml:space="preserve">Appends @structure with @features to @caps if its not already expressed by @caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the merged caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps to merge into</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the #GstStructure to merge</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="features" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCapsFeatures to merge</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="normalize" c:identifier="gst_caps_normalize">
<doc xml:space="preserve">Returns a #GstCaps that represents the same set of formats as
@caps, but contains no lists. Each list is expanded into separate
@GstStructures.
This function takes ownership of @caps and will call gst_caps_make_writable()
on it so you must not use @caps afterwards unless you keep an additional
reference to it with gst_caps_ref().</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the normalized #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">a #GstCaps to normalize</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_caps_ref" introspectable="0">
<doc xml:space="preserve">Add a reference to a #GstCaps object.
From this point on, until the caller calls gst_caps_unref() or
gst_caps_make_writable(), it is guaranteed that the caps object will not
change. This means its structures won't change, etc. To use a #GstCaps
object, you must always have a refcount on it -- either the one made
implicitly by e.g. gst_caps_new_simple(), or via taking one explicitly with
this function.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the same #GstCaps object.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to reference</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_structure" c:identifier="gst_caps_remove_structure">
<doc xml:space="preserve">removes the structure with the given index from the list of structures
contained in @caps.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to remove from</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">Index of the structure to remove</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_features" c:identifier="gst_caps_set_features" version="1.2">
<doc xml:space="preserve">Sets the #GstCapsFeatures @features for the structure at @index.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the index of the structure</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="features" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCapsFeatures to set</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="set_features_simple" c:identifier="gst_caps_set_features_simple" version="1.16">
<doc xml:space="preserve">Sets the #GstCapsFeatures @features for all the structures of @caps.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="features" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCapsFeatures to set</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="set_simple" c:identifier="gst_caps_set_simple" introspectable="0">
<doc xml:space="preserve">Sets fields in a #GstCaps. The arguments must be passed in the same
manner as gst_structure_set(), and be %NULL-terminated.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to set</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">first field to set</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional parameters</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="set_simple_valist" c:identifier="gst_caps_set_simple_valist" introspectable="0">
<doc xml:space="preserve">Sets fields in a #GstCaps. The arguments must be passed in the same
manner as gst_structure_set(), and be %NULL-terminated.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to set</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">first field to set</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">additional parameters</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="set_value" c:identifier="gst_caps_set_value">
<doc xml:space="preserve">Sets the given @field on all structures of @caps to the given @value.
This is a convenience function for calling gst_structure_set_value() on
all structures of @caps.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a writable caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">name of the field to set</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">value to set the field to</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="simplify" c:identifier="gst_caps_simplify">
<doc xml:space="preserve">Converts the given @caps into a representation that represents the
same set of formats, but in a simpler form. Component structures that are
identical are merged. Component structures that have values that can be
merged are also merged.
This function takes ownership of @caps and will call gst_caps_make_writable()
on it if necessary, so you must not use @caps afterwards unless you keep an
additional reference to it with gst_caps_ref().
This method does not preserve the original order of @caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The simplified caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">a #GstCaps to simplify</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="steal_structure" c:identifier="gst_caps_steal_structure">
<doc xml:space="preserve">Retrieves the structure with the given index from the list of structures
contained in @caps. The caller becomes the owner of the returned structure.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a pointer to the #GstStructure
corresponding to @index.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstCaps to retrieve from</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">Index of the structure to retrieve</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="subtract" c:identifier="gst_caps_subtract">
<doc xml:space="preserve">Subtracts the @subtrahend from the @minuend.
&gt; This function does not work reliably if optional properties for caps
&gt; are included on one caps and omitted on the other.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the resulting caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="minuend" transfer-ownership="none">
<doc xml:space="preserve">#GstCaps to subtract from</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
<parameter name="subtrahend" transfer-ownership="none">
<doc xml:space="preserve">#GstCaps to subtract</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="to_string" c:identifier="gst_caps_to_string">
<doc xml:space="preserve">Converts @caps to a string representation. This string representation
can be converted back to a #GstCaps by gst_caps_from_string().
For debugging purposes its easier to do something like this:
|[&lt;!-- language="C" --&gt;
GST_LOG ("caps are %" GST_PTR_FORMAT, caps);
]|
This prints the caps in human readable form.
The current implementation of serialization will lead to unexpected results
when there are nested #GstCaps / #GstStructure deeper than one level.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated string representing @caps.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="truncate" c:identifier="gst_caps_truncate">
<doc xml:space="preserve">Discard all but the first structure from @caps. Useful when
fixating.
This function takes ownership of @caps and will call gst_caps_make_writable()
on it if necessary, so you must not use @caps afterwards unless you keep an
additional reference to it with gst_caps_ref().
Note that it is not guaranteed that the returned caps have exactly one
structure. If @caps is any or empty caps then then returned caps will be
the same and contain no structure at all.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">truncated caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps to truncate</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_caps_unref" introspectable="0">
<doc xml:space="preserve">Unref a #GstCaps and and free all its structures and the
structures' values when the refcount reaches 0.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</instance-parameter>
</parameters>
</method>
<function name="from_string" c:identifier="gst_caps_from_string">
<doc xml:space="preserve">Converts @caps from a string representation.
The current implementation of serialization will lead to unexpected results
when there are nested #GstCaps / #GstStructure deeper than one level.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly allocated #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="string" transfer-ownership="none">
<doc xml:space="preserve">a string to convert to #GstCaps</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="replace" c:identifier="gst_caps_replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstCaps to point to a different #GstCaps. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
caps is unreffed, the new is reffed).
Either @new_caps or the #GstCaps pointed to by @old_caps may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_caps was different from @old_caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_caps" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer
to a #GstCaps to be replaced.</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="new_caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstCaps that will
replace the caps pointed to by @old_caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</function>
<function name="take" c:identifier="gst_caps_take" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstCaps to point to a different #GstCaps. This
function is similar to gst_caps_replace() except that it takes ownership
of @new_caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_caps was different from @old_caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_caps" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a #GstCaps to be
replaced.</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="new_caps" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstCaps that will
replace the caps pointed to by @old_caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</function>
</record>
<record name="CapsFeatures" c:type="GstCapsFeatures" version="1.2" glib:type-name="GstCapsFeatures" glib:get-type="gst_caps_features_get_type" c:symbol-prefix="caps_features">
<doc xml:space="preserve">#GstCapsFeatures can optionally be set on a #GstCaps to add requirements
for additional features for a specific #GstStructure. Caps structures with
the same name but with a non-equal set of caps features are not compatible.
If a pad supports multiple sets of features it has to add multiple equal
structures with different feature sets to the caps.
Empty #GstCapsFeatures are equivalent with the #GstCapsFeatures that only
contain #GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY. ANY #GstCapsFeatures as
created by gst_caps_features_new_any() are equal to any other #GstCapsFeatures
and can be used to specify that any #GstCapsFeatures would be supported, e.g.
for elements that don't touch buffer memory. #GstCaps with ANY #GstCapsFeatures
are considered non-fixed and during negotiation some #GstCapsFeatures have
to be selected.
Examples for caps features would be the requirement of a specific #GstMemory
types or the requirement of having a specific #GstMeta on the buffer. Features
are given as a string of the format "memory:GstMemoryTypeName" or
"meta:GstMetaAPIName".</doc>
<constructor name="new" c:identifier="gst_caps_features_new" version="1.2" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCapsFeatures with the given features.
The last argument must be %NULL.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="feature1" transfer-ownership="none">
<doc xml:space="preserve">name of first feature to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional features</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_any" c:identifier="gst_caps_features_new_any" version="1.2">
<doc xml:space="preserve">Creates a new, ANY #GstCapsFeatures. This will be equal
to any other #GstCapsFeatures but caps with these are
unfixed.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, ANY #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
</constructor>
<constructor name="new_empty" c:identifier="gst_caps_features_new_empty" version="1.2">
<doc xml:space="preserve">Creates a new, empty #GstCapsFeatures.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
</constructor>
<constructor name="new_id" c:identifier="gst_caps_features_new_id" version="1.2" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCapsFeatures with the given features.
The last argument must be 0.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="feature1" transfer-ownership="none">
<doc xml:space="preserve">name of first feature to set</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional features</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_id_valist" c:identifier="gst_caps_features_new_id_valist" version="1.2" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCapsFeatures with the given features.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="feature1" transfer-ownership="none">
<doc xml:space="preserve">name of first feature to set</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">variable argument list</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_valist" c:identifier="gst_caps_features_new_valist" version="1.2" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCapsFeatures with the given features.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="feature1" transfer-ownership="none">
<doc xml:space="preserve">name of first feature to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">variable argument list</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</constructor>
<method name="add" c:identifier="gst_caps_features_add" version="1.2">
<doc xml:space="preserve">Adds @feature to @features.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="add_id" c:identifier="gst_caps_features_add_id" version="1.2">
<doc xml:space="preserve">Adds @feature to @features.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="contains" c:identifier="gst_caps_features_contains" version="1.2">
<doc xml:space="preserve">Check if @features contains @feature.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @features contains @feature.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="contains_id" c:identifier="gst_caps_features_contains_id" version="1.2">
<doc xml:space="preserve">Check if @features contains @feature.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @features contains @feature.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_caps_features_copy" version="1.2">
<doc xml:space="preserve">Duplicates a #GstCapsFeatures and all its values.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures to duplicate</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_caps_features_free" version="1.2">
<doc xml:space="preserve">Frees a #GstCapsFeatures and all its values. The caps features must not
have a parent when this function is called.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="full">
<doc xml:space="preserve">the #GstCapsFeatures to free</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_nth" c:identifier="gst_caps_features_get_nth" version="1.2">
<doc xml:space="preserve">Returns the @i-th feature of @features.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The @i-th feature of @features.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
<parameter name="i" transfer-ownership="none">
<doc xml:space="preserve">index of the feature</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_nth_id" c:identifier="gst_caps_features_get_nth_id" version="1.2">
<doc xml:space="preserve">Returns the @i-th feature of @features.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The @i-th feature of @features.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
<parameter name="i" transfer-ownership="none">
<doc xml:space="preserve">index of the feature</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_size" c:identifier="gst_caps_features_get_size" version="1.2">
<doc xml:space="preserve">Returns the number of features in @features.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of features in @features.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_any" c:identifier="gst_caps_features_is_any" version="1.2">
<doc xml:space="preserve">Check if @features is %GST_CAPS_FEATURES_ANY.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @features is %GST_CAPS_FEATURES_ANY.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_equal" c:identifier="gst_caps_features_is_equal" version="1.2">
<doc xml:space="preserve">Check if @features1 and @features2 are equal.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @features1 and @features2 are equal.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="features1" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
<parameter name="features2" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</parameter>
</parameters>
</method>
<method name="remove" c:identifier="gst_caps_features_remove" version="1.2">
<doc xml:space="preserve">Removes @feature from @features.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="remove_id" c:identifier="gst_caps_features_remove_id" version="1.2">
<doc xml:space="preserve">Removes @feature from @features.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="set_parent_refcount" c:identifier="gst_caps_features_set_parent_refcount" version="1.2">
<doc xml:space="preserve">Sets the parent_refcount field of #GstCapsFeatures. This field is used to
determine whether a caps features is mutable or not. This function should only be
called by code implementing parent objects of #GstCapsFeatures, as described in
the MT Refcounting section of the design documents.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the parent refcount could be set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</instance-parameter>
<parameter name="refcount" transfer-ownership="none">
<doc xml:space="preserve">a pointer to the parent's refcount</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="to_string" c:identifier="gst_caps_features_to_string" version="1.2">
<doc xml:space="preserve">Converts @features to a human-readable string representation.
For debugging purposes its easier to do something like this:
|[&lt;!-- language="C" --&gt;
GST_LOG ("features is %" GST_PTR_FORMAT, features);
]|
This prints the features in human readable form.
Free-function: g_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a pointer to string allocated by g_malloc().
g_free() after usage.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</instance-parameter>
</parameters>
</method>
<function name="from_string" c:identifier="gst_caps_features_from_string" version="1.2">
<doc xml:space="preserve">Creates a #GstCapsFeatures from a string representation.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstCapsFeatures or
%NULL when the string could not be parsed. Free with
gst_caps_features_free() after use.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a string representation of a #GstCapsFeatures.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
</record>
<callback name="CapsFilterMapFunc" c:type="GstCapsFilterMapFunc">
<doc xml:space="preserve">A function that will be called in gst_caps_filter_and_map_in_place().
The function may modify @features and @structure, and both will be
removed from the caps if %FALSE is returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the features and structure should be preserved,
%FALSE if it should be removed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">the #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">the #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<bitfield name="CapsFlags" glib:type-name="GstCapsFlags" glib:get-type="gst_caps_flags_get_type" c:type="GstCapsFlags">
<doc xml:space="preserve">Extra flags for a caps.</doc>
<member name="any" value="16" c:identifier="GST_CAPS_FLAG_ANY" glib:nick="any">
<doc xml:space="preserve">Caps has no specific content, but can contain
anything.</doc>
</member>
</bitfield>
<callback name="CapsForeachFunc" c:type="GstCapsForeachFunc" version="1.6">
<doc xml:space="preserve">A function that will be called in gst_caps_foreach(). The function may
not modify @features or @structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the foreach operation should continue, %FALSE if
the foreach operation should stop with %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">the #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">the #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<enumeration name="CapsIntersectMode" glib:type-name="GstCapsIntersectMode" glib:get-type="gst_caps_intersect_mode_get_type" c:type="GstCapsIntersectMode">
<doc xml:space="preserve">Modes of caps intersection
@GST_CAPS_INTERSECT_ZIG_ZAG tries to preserve overall order of both caps
by iterating on the caps' structures as the following matrix shows:
|[
caps1
+-------------
| 1 2 4 7
caps2 | 3 5 8 10
| 6 9 11 12
]|
Used when there is no explicit precedence of one caps over the other. e.g.
tee's sink pad getcaps function, it will probe its src pad peers' for their
caps and intersect them with this mode.
@GST_CAPS_INTERSECT_FIRST is useful when an element wants to preserve
another element's caps priority order when intersecting with its own caps.
Example: If caps1 is [A, B, C] and caps2 is [E, B, D, A], the result
would be [A, B], maintaining the first caps priority on the intersection.</doc>
<member name="zig_zag" value="0" c:identifier="GST_CAPS_INTERSECT_ZIG_ZAG" glib:nick="zig-zag">
<doc xml:space="preserve">Zig-zags over both caps.</doc>
</member>
<member name="first" value="1" c:identifier="GST_CAPS_INTERSECT_FIRST" glib:nick="first">
<doc xml:space="preserve">Keeps the first caps order.</doc>
</member>
</enumeration>
<callback name="CapsMapFunc" c:type="GstCapsMapFunc">
<doc xml:space="preserve">A function that will be called in gst_caps_map_in_place(). The function
may modify @features and @structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the map operation should continue, %FALSE if
the map operation should stop with %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">the #GstCapsFeatures</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">the #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<interface name="ChildProxy" c:symbol-prefix="child_proxy" c:type="GstChildProxy" glib:type-name="GstChildProxy" glib:get-type="gst_child_proxy_get_type" glib:type-struct="ChildProxyInterface">
<doc xml:space="preserve">This interface abstracts handling of property sets for elements with
children. Imagine elements such as mixers or polyphonic generators. They all
have multiple #GstPad or some kind of voice objects. Another use case are
container elements like #GstBin.
The element implementing the interface acts as a parent for those child
objects.
By implementing this interface the child properties can be accessed from the
parent element by using gst_child_proxy_get() and gst_child_proxy_set().
Property names are written as "child-name::property-name". The whole naming
scheme is recursive. Thus "child1::child2::property" is valid too, if
"child1" and "child2" implement the #GstChildProxy interface.</doc>
<virtual-method name="child_added" invoker="child_added">
<doc xml:space="preserve">Emits the "child-added" signal.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the newly added child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the new child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="child_removed" invoker="child_removed">
<doc xml:space="preserve">Emits the "child-removed" signal.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the removed child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the old child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_child_by_index" invoker="get_child_by_index">
<doc xml:space="preserve">Fetches a child by its number.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found (index too high). Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the child's position in the child list</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_child_by_name" invoker="get_child_by_name">
<doc xml:space="preserve">Looks up a child element by the given name.
This virtual method has a default implementation that uses #GstObject
together with gst_object_get_name(). If the interface is to be used with
#GObjects, this methods needs to be overridden.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found. Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the child's name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_children_count" invoker="get_children_count">
<doc xml:space="preserve">Gets the number of child objects this parent contains.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of child objects
MT safe.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
</parameters>
</virtual-method>
<method name="child_added" c:identifier="gst_child_proxy_child_added">
<doc xml:space="preserve">Emits the "child-added" signal.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the newly added child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the new child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="child_removed" c:identifier="gst_child_proxy_child_removed">
<doc xml:space="preserve">Emits the "child-removed" signal.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the removed child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the old child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get" c:identifier="gst_child_proxy_get" introspectable="0">
<doc xml:space="preserve">Gets properties of the parent object and its children.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="first_property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the first property to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">return location for the first property, followed optionally by more name/return location pairs, followed by %NULL</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="get_child_by_index" c:identifier="gst_child_proxy_get_child_by_index">
<doc xml:space="preserve">Fetches a child by its number.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found (index too high). Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the child's position in the child list</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_child_by_name" c:identifier="gst_child_proxy_get_child_by_name">
<doc xml:space="preserve">Looks up a child element by the given name.
This virtual method has a default implementation that uses #GstObject
together with gst_object_get_name(). If the interface is to be used with
#GObjects, this methods needs to be overridden.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found. Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the child's name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_children_count" c:identifier="gst_child_proxy_get_children_count">
<doc xml:space="preserve">Gets the number of child objects this parent contains.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of child objects
MT safe.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_property" c:identifier="gst_child_proxy_get_property">
<doc xml:space="preserve">Gets a single property using the GstChildProxy mechanism.
You are responsible for freeing it by calling g_value_unset()</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">object to query</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of the property</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">a #GValue that should take the result.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</method>
<method name="get_valist" c:identifier="gst_child_proxy_get_valist" introspectable="0">
<doc xml:space="preserve">Gets properties of the parent object and its children.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object to query</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="first_property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the first property to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">return location for the first property, followed optionally by more name/return location pairs, followed by %NULL</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="lookup" c:identifier="gst_child_proxy_lookup">
<doc xml:space="preserve">Looks up which object and #GParamSpec would be effected by the given @name.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @target and @pspec could be found. %FALSE otherwise. In that
case the values for @pspec and @target are not modified. Unref @target after
usage. For plain GObjects @target is the same as @object.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">child proxy object to lookup the property in</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of the property to look up</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="target" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GObject that
takes the real object to set property on</doc>
<type name="GObject.Object" c:type="GObject**"/>
</parameter>
<parameter name="pspec" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to take the #GParamSpec
describing the property</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec**"/>
</parameter>
</parameters>
</method>
<method name="set" c:identifier="gst_child_proxy_set" introspectable="0">
<doc xml:space="preserve">Sets properties of the parent object and its children.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="first_property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the first property to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">value for the first property, followed optionally by more name/value pairs, followed by %NULL</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="set_property" c:identifier="gst_child_proxy_set_property">
<doc xml:space="preserve">Sets a single property using the GstChildProxy mechanism.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of the property to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">new #GValue for the property</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="set_valist" c:identifier="gst_child_proxy_set_valist" introspectable="0">
<doc xml:space="preserve">Sets properties of the parent object and its children.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</instance-parameter>
<parameter name="first_property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the first property to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">value for the first property, followed optionally by more name/value pairs, followed by %NULL</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<glib:signal name="child-added" when="first">
<doc xml:space="preserve">Will be emitted after the @object was added to the @child_proxy.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the #GObject that was added</doc>
<type name="GObject.Object"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the new child</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="child-removed" when="first">
<doc xml:space="preserve">Will be emitted after the @object was removed from the @child_proxy.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the #GObject that was removed</doc>
<type name="GObject.Object"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the old child</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
</parameters>
</glib:signal>
</interface>
<record name="ChildProxyInterface" c:type="GstChildProxyInterface" glib:is-gtype-struct-for="ChildProxy">
<doc xml:space="preserve">#GstChildProxy interface.</doc>
<field name="parent">
<doc xml:space="preserve">parent interface type.</doc>
<type name="GObject.TypeInterface" c:type="GTypeInterface"/>
</field>
<field name="get_child_by_name">
<callback name="get_child_by_name">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found. Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the child's name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_child_by_index">
<callback name="get_child_by_index">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the child object or %NULL if
not found (index too high). Unref after usage.
MT safe.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</return-value>
<parameters>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object to get the child from</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the child's position in the child list</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_children_count">
<callback name="get_children_count">
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of child objects
MT safe.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="child_added">
<callback name="child_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the newly added child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the new child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="child_removed">
<callback name="child_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent object</doc>
<type name="ChildProxy" c:type="GstChildProxy*"/>
</parameter>
<parameter name="child" transfer-ownership="none">
<doc xml:space="preserve">the removed child</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the old child</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<class name="Clock" c:symbol-prefix="clock" c:type="GstClock" parent="Object" abstract="1" glib:type-name="GstClock" glib:get-type="gst_clock_get_type" glib:type-struct="ClockClass">
<doc xml:space="preserve">GStreamer uses a global clock to synchronize the plugins in a pipeline.
Different clock implementations are possible by implementing this abstract
base class or, more conveniently, by subclassing #GstSystemClock.
The #GstClock returns a monotonically increasing time with the method
gst_clock_get_time(). Its accuracy and base time depend on the specific
clock implementation but time is always expressed in nanoseconds. Since the
baseline of the clock is undefined, the clock time returned is not
meaningful in itself, what matters are the deltas between two clock times.
The time returned by a clock is called the absolute time.
The pipeline uses the clock to calculate the running time. Usually all
renderers synchronize to the global clock using the buffer timestamps, the
newsegment events and the element's base time, see #GstPipeline.
A clock implementation can support periodic and single shot clock
notifications both synchronous and asynchronous.
One first needs to create a #GstClockID for the periodic or single shot
notification using gst_clock_new_single_shot_id() or
gst_clock_new_periodic_id().
To perform a blocking wait for the specific time of the #GstClockID use the
gst_clock_id_wait(). To receive a callback when the specific time is reached
in the clock use gst_clock_id_wait_async(). Both these calls can be
interrupted with the gst_clock_id_unschedule() call. If the blocking wait is
unscheduled a return value of #GST_CLOCK_UNSCHEDULED is returned.
Periodic callbacks scheduled async will be repeatedly called automatically
until it is unscheduled. To schedule a sync periodic callback,
gst_clock_id_wait() should be called repeatedly.
The async callbacks can happen from any thread, either provided by the core
or from a streaming thread. The application should be prepared for this.
A #GstClockID that has been unscheduled cannot be used again for any wait
operation, a new #GstClockID should be created and the old unscheduled one
should be destroyed with gst_clock_id_unref().
It is possible to perform a blocking wait on the same #GstClockID from
multiple threads. However, registering the same #GstClockID for multiple
async notifications is not possible, the callback will only be called for
the thread registering the entry last.
None of the wait operations unref the #GstClockID, the owner is responsible
for unreffing the ids itself. This holds for both periodic and single shot
notifications. The reason being that the owner of the #GstClockID has to
keep a handle to the #GstClockID to unblock the wait on FLUSHING events or
state changes and if the entry would be unreffed automatically, the handle
might become invalid without any notification.
These clock operations do not operate on the running time, so the callbacks
will also occur when not in PLAYING state as if the clock just keeps on
running. Some clocks however do not progress when the element that provided
the clock is not PLAYING.
When a clock has the #GST_CLOCK_FLAG_CAN_SET_MASTER flag set, it can be
slaved to another #GstClock with the gst_clock_set_master(). The clock will
then automatically be synchronized to this master clock by repeatedly
sampling the master clock and the slave clock and recalibrating the slave
clock with gst_clock_set_calibration(). This feature is mostly useful for
plugins that have an internal clock but must operate with another clock
selected by the #GstPipeline. They can track the offset and rate difference
of their internal clock relative to the master clock by using the
gst_clock_get_calibration() function.
The master/slave synchronisation can be tuned with the #GstClock:timeout,
#GstClock:window-size and #GstClock:window-threshold properties.
The #GstClock:timeout property defines the interval to sample the master
clock and run the calibration functions. #GstClock:window-size defines the
number of samples to use when calibrating and #GstClock:window-threshold
defines the minimum number of samples before the calibration is performed.</doc>
<function name="id_compare_func" c:identifier="gst_clock_id_compare_func">
<doc xml:space="preserve">Compares the two #GstClockID instances. This function can be used
as a GCompareFunc when sorting ids.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">negative value if a &lt; b; zero if a = b; positive value if a &gt; b
MT safe.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="id1" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstClockID</doc>
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
<parameter name="id2" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstClockID to compare with</doc>
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
</parameters>
</function>
<function name="id_get_clock" c:identifier="gst_clock_id_get_clock" version="1.16">
<doc xml:space="preserve">This function returns the underlying clock.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstClock or %NULL when the
underlying clock has been freed. Unref after usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockID</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
</parameters>
</function>
<function name="id_get_time" c:identifier="gst_clock_id_get_time">
<doc xml:space="preserve">Get the time of the clock ID</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the time of the given clock id.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID to query</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
</parameters>
</function>
<function name="id_ref" c:identifier="gst_clock_id_ref">
<doc xml:space="preserve">Increase the refcount of given @id.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The same #GstClockID with increased refcount.
MT safe.</doc>
<type name="ClockID" c:type="GstClockID"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID to ref</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
</parameters>
</function>
<function name="id_unref" c:identifier="gst_clock_id_unref">
<doc xml:space="preserve">Unref given @id. When the refcount reaches 0 the
#GstClockID will be freed.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="full">
<doc xml:space="preserve">The #GstClockID to unref</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
</parameters>
</function>
<function name="id_unschedule" c:identifier="gst_clock_id_unschedule">
<doc xml:space="preserve">Cancel an outstanding request with @id. This can either
be an outstanding async notification or a pending sync notification.
After this call, @id cannot be used anymore to receive sync or
async notifications, you need to create a new #GstClockID.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">The id to unschedule</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
</parameters>
</function>
<function name="id_uses_clock" c:identifier="gst_clock_id_uses_clock" version="1.16">
<doc xml:space="preserve">This function returns whether @id uses @clock as the underlying clock.
@clock can be NULL, in which case the return value indicates whether
the underlying clock has been freed. If this is the case, the @id is
no longer usable and should be freed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">whether the clock @id uses the same underlying #GstClock @clock.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockID to check</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to compare against</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</function>
<function name="id_wait" c:identifier="gst_clock_id_wait">
<doc xml:space="preserve">Perform a blocking wait on @id.
@id should have been created with gst_clock_new_single_shot_id()
or gst_clock_new_periodic_id() and should not have been unscheduled
with a call to gst_clock_id_unschedule().
If the @jitter argument is not %NULL and this function returns #GST_CLOCK_OK
or #GST_CLOCK_EARLY, it will contain the difference
against the clock and the time of @id when this method was
called.
Positive values indicate how late @id was relative to the clock
(in which case this function will return #GST_CLOCK_EARLY).
Negative values indicate how much time was spent waiting on the clock
before this function returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the blocking wait. #GST_CLOCK_EARLY will be returned
if the current clock time is past the time of @id, #GST_CLOCK_OK if
@id was scheduled in time. #GST_CLOCK_UNSCHEDULED if @id was
unscheduled with gst_clock_id_unschedule().
MT safe.</doc>
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID to wait on</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="jitter" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer that will contain the jitter,
can be %NULL.</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff*"/>
</parameter>
</parameters>
</function>
<function name="id_wait_async" c:identifier="gst_clock_id_wait_async">
<doc xml:space="preserve">Register a callback on the given #GstClockID @id with the given
function and user_data. When passing a #GstClockID with an invalid
time to this function, the callback will be called immediately
with a time set to GST_CLOCK_TIME_NONE. The callback will
be called when the time of @id has been reached.
The callback @func can be invoked from any thread, either provided by the
core or from a streaming thread. The application should be prepared for this.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the non blocking wait.
MT safe.</doc>
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockID to wait on</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="2" destroy="3">
<doc xml:space="preserve">The callback function</doc>
<type name="ClockCallback" c:type="GstClockCallback"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">User data passed in the callback</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="destroy_data" transfer-ownership="none" scope="async">
<doc xml:space="preserve">#GDestroyNotify for user_data</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</function>
<virtual-method name="change_resolution">
<return-value transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="old_resolution" transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="new_resolution" transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_internal_time" invoker="get_internal_time">
<doc xml:space="preserve">Gets the current internal time of the given clock. The time is returned
unadjusted for the offset and the rate.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the internal time of the clock. Or GST_CLOCK_TIME_NONE when
given invalid input.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to query</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="get_resolution" invoker="get_resolution">
<doc xml:space="preserve">Get the accuracy of the clock. The accuracy of the clock is the granularity
of the values returned by gst_clock_get_time().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the resolution of the clock in units of #GstClockTime.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="unschedule">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="wait">
<return-value transfer-ownership="none">
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
<parameter name="jitter" transfer-ownership="none">
<type name="ClockTimeDiff" c:type="GstClockTimeDiff*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="wait_async">
<return-value transfer-ownership="none">
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
</parameters>
</virtual-method>
<method name="add_observation" c:identifier="gst_clock_add_observation">
<doc xml:space="preserve">The time @master of the master clock and the time @slave of the slave
clock are added to the list of observations. If enough observations
are available, a linear regression algorithm is run on the
observations and @clock is recalibrated.
If this functions returns %TRUE, @r_squared will contain the
correlation coefficient of the interpolation. A value of 1.0
means a perfect regression was performed. This value can
be used to control the sampling frequency of the master and slave
clocks.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if enough observations were added to run the
regression algorithm.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="slave" transfer-ownership="none">
<doc xml:space="preserve">a time on the slave</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="master" transfer-ownership="none">
<doc xml:space="preserve">a time on the master</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="r_squared" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to hold the result</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="add_observation_unapplied" c:identifier="gst_clock_add_observation_unapplied" version="1.6">
<doc xml:space="preserve">Add a clock observation to the internal slaving algorithm the same as
gst_clock_add_observation(), and return the result of the master clock
estimation, without updating the internal calibration.
The caller can then take the results and call gst_clock_set_calibration()
with the values, or some modified version of them.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="slave" transfer-ownership="none">
<doc xml:space="preserve">a time on the slave</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="master" transfer-ownership="none">
<doc xml:space="preserve">a time on the master</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="r_squared" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to hold the result</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="internal" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the internal time</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="external" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the external time</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="rate_num" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the rate numerator</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="rate_denom" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the rate denominator</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="adjust_unlocked" c:identifier="gst_clock_adjust_unlocked">
<doc xml:space="preserve">Converts the given @internal clock time to the external time, adjusting for the
rate and reference time set with gst_clock_set_calibration() and making sure
that the returned time is increasing. This function should be called with the
clock's OBJECT_LOCK held and is mainly used by clock subclasses.
This function is the reverse of gst_clock_unadjust_unlocked().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the converted time of the clock.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to use</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="internal" transfer-ownership="none">
<doc xml:space="preserve">a clock time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="adjust_with_calibration" c:identifier="gst_clock_adjust_with_calibration" version="1.6">
<doc xml:space="preserve">Converts the given @internal_target clock time to the external time,
using the passed calibration parameters. This function performs the
same calculation as gst_clock_adjust_unlocked() when called using the
current calibration parameters, but doesn't ensure a monotonically
increasing result as gst_clock_adjust_unlocked() does.
Note: The @clock parameter is unused and can be NULL</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the converted time of the clock.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstClock to use</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="internal_target" transfer-ownership="none">
<doc xml:space="preserve">a clock time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cinternal" transfer-ownership="none">
<doc xml:space="preserve">a reference internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cexternal" transfer-ownership="none">
<doc xml:space="preserve">a reference external time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cnum" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the rate of the clock relative to its
internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cdenom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the rate of the clock</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="get_calibration" c:identifier="gst_clock_get_calibration">
<doc xml:space="preserve">Gets the internal rate and reference time of @clock. See
gst_clock_set_calibration() for more information.
@internal, @external, @rate_num, and @rate_denom can be left %NULL if the
caller is not interested in the values.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="internal" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the internal time</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="external" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the external time</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="rate_num" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the rate numerator</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="rate_denom" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location to store the rate denominator</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="get_internal_time" c:identifier="gst_clock_get_internal_time">
<doc xml:space="preserve">Gets the current internal time of the given clock. The time is returned
unadjusted for the offset and the rate.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the internal time of the clock. Or GST_CLOCK_TIME_NONE when
given invalid input.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to query</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_master" c:identifier="gst_clock_get_master">
<doc xml:space="preserve">Get the master clock that @clock is slaved to or %NULL when the clock is
not slaved to any master clock.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a master #GstClock or %NULL
when this clock is not slaved to a master clock. Unref after
usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_resolution" c:identifier="gst_clock_get_resolution">
<doc xml:space="preserve">Get the accuracy of the clock. The accuracy of the clock is the granularity
of the values returned by gst_clock_get_time().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the resolution of the clock in units of #GstClockTime.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_time" c:identifier="gst_clock_get_time">
<doc xml:space="preserve">Gets the current time of the given clock. The time is always
monotonically increasing and adjusted according to the current
offset and rate.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the time of the clock. Or GST_CLOCK_TIME_NONE when
given invalid input.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to query</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_timeout" c:identifier="gst_clock_get_timeout">
<doc xml:space="preserve">Get the amount of time that master and slave clocks are sampled.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the interval between samples.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_synced" c:identifier="gst_clock_is_synced" version="1.6">
<doc xml:space="preserve">Checks if the clock is currently synced.
This returns if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC is not set on the clock.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the clock is currently synced</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
</parameters>
</method>
<method name="new_periodic_id" c:identifier="gst_clock_new_periodic_id">
<doc xml:space="preserve">Get an ID from @clock to trigger a periodic notification.
The periodic notifications will start at time @start_time and
will then be fired with the given @interval. @id should be unreffed
after usage.
Free-function: gst_clock_id_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstClockID that can be used to request the
time notification.
MT safe.</doc>
<type name="ClockID" c:type="GstClockID"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID to get a periodic notification id from</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="start_time" transfer-ownership="none">
<doc xml:space="preserve">the requested start time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the requested interval</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="new_single_shot_id" c:identifier="gst_clock_new_single_shot_id">
<doc xml:space="preserve">Get a #GstClockID from @clock to trigger a single shot
notification at the requested time. The single shot id should be
unreffed after usage.
Free-function: gst_clock_id_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstClockID that can be used to request the
time notification.
MT safe.</doc>
<type name="ClockID" c:type="GstClockID"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID to get a single shot notification from</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="time" transfer-ownership="none">
<doc xml:space="preserve">the requested time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="periodic_id_reinit" c:identifier="gst_clock_periodic_id_reinit">
<doc xml:space="preserve">Reinitializes the provided periodic @id to the provided start time and
interval. Does not modify the reference count.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the GstClockID could be reinitialized to the provided
@time, else %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockID</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="start_time" transfer-ownership="none">
<doc xml:space="preserve">the requested start time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the requested interval</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_calibration" c:identifier="gst_clock_set_calibration">
<doc xml:space="preserve">Adjusts the rate and time of @clock. A rate of 1/1 is the normal speed of
the clock. Values bigger than 1/1 make the clock go faster.
@internal and @external are calibration parameters that arrange that
gst_clock_get_time() should have been @external at internal time @internal.
This internal time should not be in the future; that is, it should be less
than the value of gst_clock_get_internal_time() when this function is called.
Subsequent calls to gst_clock_get_time() will return clock times computed as
follows:
|[
time = (internal_time - internal) * rate_num / rate_denom + external
]|
This formula is implemented in gst_clock_adjust_unlocked(). Of course, it
tries to do the integer arithmetic as precisely as possible.
Note that gst_clock_get_time() always returns increasing values so when you
move the clock backwards, gst_clock_get_time() will report the previous value
until the clock catches up.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to calibrate</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="internal" transfer-ownership="none">
<doc xml:space="preserve">a reference internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="external" transfer-ownership="none">
<doc xml:space="preserve">a reference external time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="rate_num" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the rate of the clock relative to its
internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="rate_denom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the rate of the clock</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_master" c:identifier="gst_clock_set_master">
<doc xml:space="preserve">Set @master as the master clock for @clock. @clock will be automatically
calibrated so that gst_clock_get_time() reports the same time as the
master clock.
A clock provider that slaves its clock to a master can get the current
calibration values with gst_clock_get_calibration().
@master can be %NULL in which case @clock will not be slaved anymore. It will
however keep reporting its time adjusted with the last configured rate
and time offsets.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the clock is capable of being slaved to a master clock.
Trying to set a master on a clock without the
#GST_CLOCK_FLAG_CAN_SET_MASTER flag will make this function return %FALSE.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="master" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a master #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</method>
<method name="set_resolution" c:identifier="gst_clock_set_resolution">
<doc xml:space="preserve">Set the accuracy of the clock. Some clocks have the possibility to operate
with different accuracy at the expense of more resource usage. There is
normally no need to change the default resolution of a clock. The resolution
of a clock can only be changed if the clock has the
#GST_CLOCK_FLAG_CAN_SET_RESOLUTION flag set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the new resolution of the clock.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="resolution" transfer-ownership="none">
<doc xml:space="preserve">The resolution to set</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_synced" c:identifier="gst_clock_set_synced" version="1.6">
<doc xml:space="preserve">Sets @clock to synced and emits the GstClock::synced signal, and wakes up any
thread waiting in gst_clock_wait_for_sync().
This function must only be called if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC
is set on the clock, and is intended to be called by subclasses only.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="synced" transfer-ownership="none">
<doc xml:space="preserve">if the clock is synced</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_timeout" c:identifier="gst_clock_set_timeout">
<doc xml:space="preserve">Set the amount of time, in nanoseconds, to sample master and slave
clocks</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a timeout</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="single_shot_id_reinit" c:identifier="gst_clock_single_shot_id_reinit">
<doc xml:space="preserve">Reinitializes the provided single shot @id to the provided time. Does not
modify the reference count.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the GstClockID could be reinitialized to the provided
@time, else %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockID</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="time" transfer-ownership="none">
<doc xml:space="preserve">The requested time.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="unadjust_unlocked" c:identifier="gst_clock_unadjust_unlocked">
<doc xml:space="preserve">Converts the given @external clock time to the internal time of @clock,
using the rate and reference time set with gst_clock_set_calibration().
This function should be called with the clock's OBJECT_LOCK held and
is mainly used by clock subclasses.
This function is the reverse of gst_clock_adjust_unlocked().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the internal time of the clock corresponding to @external.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to use</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="external" transfer-ownership="none">
<doc xml:space="preserve">an external clock time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="unadjust_with_calibration" c:identifier="gst_clock_unadjust_with_calibration" version="1.8">
<doc xml:space="preserve">Converts the given @external_target clock time to the internal time,
using the passed calibration parameters. This function performs the
same calculation as gst_clock_unadjust_unlocked() when called using the
current calibration parameters.
Note: The @clock parameter is unused and can be NULL</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the converted time of the clock.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstClock to use</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="external_target" transfer-ownership="none">
<doc xml:space="preserve">a clock time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cinternal" transfer-ownership="none">
<doc xml:space="preserve">a reference internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cexternal" transfer-ownership="none">
<doc xml:space="preserve">a reference external time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cnum" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the rate of the clock relative to its
internal time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="cdenom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the rate of the clock</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="wait_for_sync" c:identifier="gst_clock_wait_for_sync" version="1.6">
<doc xml:space="preserve">Waits until @clock is synced for reporting the current time. If @timeout
is %GST_CLOCK_TIME_NONE it will wait forever, otherwise it will time out
after @timeout nanoseconds.
For asynchronous waiting, the GstClock::synced signal can be used.
This returns immediately with TRUE if GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC
is not set on the clock, or if the clock is already synced.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if waiting was successful, or %FALSE on timeout</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</instance-parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">timeout for waiting or %GST_CLOCK_TIME_NONE</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<property name="timeout" writable="1" transfer-ownership="none">
<type name="guint64" c:type="guint64"/>
</property>
<property name="window-size" writable="1" transfer-ownership="none">
<type name="gint" c:type="gint"/>
</property>
<property name="window-threshold" writable="1" transfer-ownership="none">
<type name="gint" c:type="gint"/>
</property>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="ClockPrivate" c:type="GstClockPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="synced" when="last" version="1.6">
<doc xml:space="preserve">Signaled on clocks with GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC set once
the clock is synchronized, or when it completely lost synchronization.
This signal will not be emitted on clocks without the flag.
This signal will be emitted from an arbitrary thread, most likely not
the application's main thread.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="synced" transfer-ownership="none">
<doc xml:space="preserve">if the clock is synced now</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</glib:signal>
</class>
<callback name="ClockCallback" c:type="GstClockCallback">
<doc xml:space="preserve">The function prototype of the callback.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE or %FALSE (currently unused)</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">The clock that triggered the callback</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="time" transfer-ownership="none">
<doc xml:space="preserve">The time it was triggered</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">The #GstClockID that expired</doc>
<type name="ClockID" c:type="GstClockID"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="3">
<doc xml:space="preserve">user data passed in the gst_clock_id_wait_async() function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="ClockClass" c:type="GstClockClass" glib:is-gtype-struct-for="Clock">
<doc xml:space="preserve">GStreamer clock class. Override the vmethods to implement the clock
functionality.</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent class structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="change_resolution">
<callback name="change_resolution">
<return-value transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="old_resolution" transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="new_resolution" transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_resolution">
<callback name="get_resolution">
<return-value transfer-ownership="none">
<doc xml:space="preserve">the resolution of the clock in units of #GstClockTime.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_internal_time">
<callback name="get_internal_time">
<return-value transfer-ownership="none">
<doc xml:space="preserve">the internal time of the clock. Or GST_CLOCK_TIME_NONE when
given invalid input.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">a #GstClock to query</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="wait">
<callback name="wait">
<return-value transfer-ownership="none">
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
<parameter name="jitter" transfer-ownership="none">
<type name="ClockTimeDiff" c:type="GstClockTimeDiff*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="wait_async">
<callback name="wait_async">
<return-value transfer-ownership="none">
<type name="ClockReturn" c:type="GstClockReturn"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="unschedule">
<callback name="unschedule">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="clock" transfer-ownership="none">
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="entry" transfer-ownership="none">
<type name="ClockEntry" c:type="GstClockEntry*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="ClockEntry" c:type="GstClockEntry">
<doc xml:space="preserve">All pending timeouts or periodic notifies are converted into
an entry.
Note that GstClockEntry should be treated as an opaque structure. It must
not be extended or allocated using a custom allocator.</doc>
<field name="refcount" writable="1">
<doc xml:space="preserve">reference counter (read-only)</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="clock" writable="1">
<type name="Clock" c:type="GstClock*"/>
</field>
<field name="type" writable="1">
<type name="ClockEntryType" c:type="GstClockEntryType"/>
</field>
<field name="time" writable="1">
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="interval" writable="1">
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="status" writable="1">
<type name="ClockReturn" c:type="GstClockReturn"/>
</field>
<field name="func" writable="1">
<type name="ClockCallback" c:type="GstClockCallback"/>
</field>
<field name="user_data" writable="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="destroy_data" writable="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="unscheduled" writable="1">
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="woken_up" writable="1">
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<enumeration name="ClockEntryType" glib:type-name="GstClockEntryType" glib:get-type="gst_clock_entry_type_get_type" c:type="GstClockEntryType">
<doc xml:space="preserve">The type of the clock entry</doc>
<member name="single" value="0" c:identifier="GST_CLOCK_ENTRY_SINGLE" glib:nick="single">
<doc xml:space="preserve">a single shot timeout</doc>
</member>
<member name="periodic" value="1" c:identifier="GST_CLOCK_ENTRY_PERIODIC" glib:nick="periodic">
<doc xml:space="preserve">a periodic timeout request</doc>
</member>
</enumeration>
<bitfield name="ClockFlags" glib:type-name="GstClockFlags" glib:get-type="gst_clock_flags_get_type" c:type="GstClockFlags">
<doc xml:space="preserve">The capabilities of this clock</doc>
<member name="can_do_single_sync" value="16" c:identifier="GST_CLOCK_FLAG_CAN_DO_SINGLE_SYNC" glib:nick="can-do-single-sync">
<doc xml:space="preserve">clock can do a single sync timeout request</doc>
</member>
<member name="can_do_single_async" value="32" c:identifier="GST_CLOCK_FLAG_CAN_DO_SINGLE_ASYNC" glib:nick="can-do-single-async">
<doc xml:space="preserve">clock can do a single async timeout request</doc>
</member>
<member name="can_do_periodic_sync" value="64" c:identifier="GST_CLOCK_FLAG_CAN_DO_PERIODIC_SYNC" glib:nick="can-do-periodic-sync">
<doc xml:space="preserve">clock can do sync periodic timeout requests</doc>
</member>
<member name="can_do_periodic_async" value="128" c:identifier="GST_CLOCK_FLAG_CAN_DO_PERIODIC_ASYNC" glib:nick="can-do-periodic-async">
<doc xml:space="preserve">clock can do async periodic timeout callbacks</doc>
</member>
<member name="can_set_resolution" value="256" c:identifier="GST_CLOCK_FLAG_CAN_SET_RESOLUTION" glib:nick="can-set-resolution">
<doc xml:space="preserve">clock's resolution can be changed</doc>
</member>
<member name="can_set_master" value="512" c:identifier="GST_CLOCK_FLAG_CAN_SET_MASTER" glib:nick="can-set-master">
<doc xml:space="preserve">clock can be slaved to a master clock</doc>
</member>
<member name="needs_startup_sync" value="1024" c:identifier="GST_CLOCK_FLAG_NEEDS_STARTUP_SYNC" glib:nick="needs-startup-sync">
<doc xml:space="preserve">clock needs to be synced before it can be used
(Since: 1.6)</doc>
</member>
<member name="last" value="4096" c:identifier="GST_CLOCK_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">subclasses can add additional flags starting from this flag</doc>
</member>
</bitfield>
<record name="ClockPrivate" c:type="GstClockPrivate" disguised="1"/>
<enumeration name="ClockReturn" glib:type-name="GstClockReturn" glib:get-type="gst_clock_return_get_type" c:type="GstClockReturn">
<doc xml:space="preserve">The return value of a clock operation.</doc>
<member name="ok" value="0" c:identifier="GST_CLOCK_OK" glib:nick="ok">
<doc xml:space="preserve">The operation succeeded.</doc>
</member>
<member name="early" value="1" c:identifier="GST_CLOCK_EARLY" glib:nick="early">
<doc xml:space="preserve">The operation was scheduled too late.</doc>
</member>
<member name="unscheduled" value="2" c:identifier="GST_CLOCK_UNSCHEDULED" glib:nick="unscheduled">
<doc xml:space="preserve">The clockID was unscheduled</doc>
</member>
<member name="busy" value="3" c:identifier="GST_CLOCK_BUSY" glib:nick="busy">
<doc xml:space="preserve">The ClockID is busy</doc>
</member>
<member name="badtime" value="4" c:identifier="GST_CLOCK_BADTIME" glib:nick="badtime">
<doc xml:space="preserve">A bad time was provided to a function.</doc>
</member>
<member name="error" value="5" c:identifier="GST_CLOCK_ERROR" glib:nick="error">
<doc xml:space="preserve">An error occurred</doc>
</member>
<member name="unsupported" value="6" c:identifier="GST_CLOCK_UNSUPPORTED" glib:nick="unsupported">
<doc xml:space="preserve">Operation is not supported</doc>
</member>
<member name="done" value="7" c:identifier="GST_CLOCK_DONE" glib:nick="done">
<doc xml:space="preserve">The ClockID is done waiting</doc>
</member>
</enumeration>
<enumeration name="ClockType" glib:type-name="GstClockType" glib:get-type="gst_clock_type_get_type" c:type="GstClockType">
<doc xml:space="preserve">The different kind of clocks.</doc>
<member name="realtime" value="0" c:identifier="GST_CLOCK_TYPE_REALTIME" glib:nick="realtime">
<doc xml:space="preserve">time since Epoch</doc>
</member>
<member name="monotonic" value="1" c:identifier="GST_CLOCK_TYPE_MONOTONIC" glib:nick="monotonic">
<doc xml:space="preserve">monotonic time since some unspecified starting
point</doc>
</member>
<member name="other" value="2" c:identifier="GST_CLOCK_TYPE_OTHER" glib:nick="other">
<doc xml:space="preserve">some other time source is used (Since: 1.0.5)</doc>
</member>
<member name="tai" value="3" c:identifier="GST_CLOCK_TYPE_TAI" glib:nick="tai">
<doc xml:space="preserve">time since Epoch, but using International Atomic Time
as reference (Since: 1.18)</doc>
</member>
</enumeration>
<record name="Context" c:type="GstContext" version="1.2" glib:type-name="GstContext" glib:get-type="gst_context_get_type" c:symbol-prefix="context">
<doc xml:space="preserve">#GstContext is a container object used to store contexts like a device
context, a display server connection and similar concepts that should
be shared between multiple elements.
Applications can set a context on a complete pipeline by using
gst_element_set_context(), which will then be propagated to all
child elements. Elements can handle these in #GstElementClass.set_context()
and merge them with the context information they already have.
When an element needs a context it will do the following actions in this
order until one step succeeds:
1. Check if the element already has a context
2. Query downstream with GST_QUERY_CONTEXT for the context
3. Query upstream with GST_QUERY_CONTEXT for the context
4. Post a GST_MESSAGE_NEED_CONTEXT message on the bus with the required
context types and afterwards check if a usable context was set now
5. Create a context by itself and post a GST_MESSAGE_HAVE_CONTEXT message
on the bus.
Bins will catch GST_MESSAGE_NEED_CONTEXT messages and will set any previously
known context on the element that asks for it if possible. Otherwise the
application should provide one if it can.
#GstContext&lt;!-- --&gt;s can be persistent.
A persistent #GstContext is kept in elements when they reach
%GST_STATE_NULL, non-persistent ones will be removed.
Also, a non-persistent context won't override a previous persistent
context set to an element.</doc>
<constructor name="new" c:identifier="gst_context_new" version="1.2">
<doc xml:space="preserve">Create a new context.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new context.</doc>
<type name="Context" c:type="GstContext*"/>
</return-value>
<parameters>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">Context type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="persistent" transfer-ownership="none">
<doc xml:space="preserve">Persistent context</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<method name="get_context_type" c:identifier="gst_context_get_context_type" version="1.2">
<doc xml:space="preserve">Get the type of @context.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The type of the context.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">The #GstContext.</doc>
<type name="Context" c:type="const GstContext*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_structure" c:identifier="gst_context_get_structure" version="1.2">
<doc xml:space="preserve">Access the structure of the context.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The structure of the context. The structure is
still owned by the context, which means that you should not modify it,
free it and that the pointer becomes invalid when you free the context.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">The #GstContext.</doc>
<type name="Context" c:type="const GstContext*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_context_type" c:identifier="gst_context_has_context_type" version="1.2">
<doc xml:space="preserve">Checks if @context has @context_type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @context has @context_type.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">The #GstContext.</doc>
<type name="Context" c:type="const GstContext*"/>
</instance-parameter>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">Context type to check.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="is_persistent" c:identifier="gst_context_is_persistent" version="1.2">
<doc xml:space="preserve">Check if @context is persistent.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the context is persistent.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">The #GstContext.</doc>
<type name="Context" c:type="const GstContext*"/>
</instance-parameter>
</parameters>
</method>
<method name="writable_structure" c:identifier="gst_context_writable_structure" version="1.2">
<doc xml:space="preserve">Get a writable version of the structure.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The structure of the context. The structure is still
owned by the context, which means that you should not free it and
that the pointer becomes invalid when you free the context.
This function checks if @context is writable.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">The #GstContext.</doc>
<type name="Context" c:type="GstContext*"/>
</instance-parameter>
</parameters>
</method>
</record>
<class name="ControlBinding" c:symbol-prefix="control_binding" c:type="GstControlBinding" parent="Object" abstract="1" glib:type-name="GstControlBinding" glib:get-type="gst_control_binding_get_type" glib:type-struct="ControlBindingClass">
<doc xml:space="preserve">A base class for value mapping objects that attaches control sources to gobject
properties. Such an object is taking one or more #GstControlSource instances,
combines them and maps the resulting value to the type and value range of the
bound property.</doc>
<virtual-method name="get_g_value_array" invoker="get_g_value_array">
<doc xml:space="preserve">Gets a number of #GValues for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
#GValue.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="2" zero-terminated="0" c:type="GValue*">
<type name="GObject.Value" c:type="GValue"/>
</array>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_value" invoker="get_value">
<doc xml:space="preserve">Gets the value for the given controlled property at the requested time.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GValue of the property at the given time,
or %NULL if the property isn't controlled.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time the control-change should be read from</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_value_array" invoker="get_value_array" introspectable="0">
<doc xml:space="preserve">Gets a number of values for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
the same type as the objects property's type.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.
The values are unboxed and ready to be used. The similar function
gst_control_binding_get_g_value_array() returns the array as #GValues and is
more suitable for bindings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="2" zero-terminated="0" c:type="gpointer">
<type name="gpointer" c:type="gpointer"/>
</array>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="sync_values" invoker="sync_values">
<doc xml:space="preserve">Sets the property of the @object, according to the #GstControlSources that
handle them and for the given timestamp.
If this function fails, it is most likely the application developers fault.
Most probably the control sources are not setup correctly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the controller value could be applied to the object
property, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="last_sync" transfer-ownership="none">
<doc xml:space="preserve">the last time this was called</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</virtual-method>
<method name="get_g_value_array" c:identifier="gst_control_binding_get_g_value_array">
<doc xml:space="preserve">Gets a number of #GValues for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
#GValue.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="2" zero-terminated="0" c:type="GValue*">
<type name="GObject.Value" c:type="GValue"/>
</array>
</parameter>
</parameters>
</method>
<method name="get_value" c:identifier="gst_control_binding_get_value">
<doc xml:space="preserve">Gets the value for the given controlled property at the requested time.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GValue of the property at the given time,
or %NULL if the property isn't controlled.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time the control-change should be read from</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="get_value_array" c:identifier="gst_control_binding_get_value_array" introspectable="0">
<doc xml:space="preserve">Gets a number of values for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
the same type as the objects property's type.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.
The values are unboxed and ready to be used. The similar function
gst_control_binding_get_g_value_array() returns the array as #GValues and is
more suitable for bindings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="2" zero-terminated="0" c:type="gpointer">
<type name="gpointer" c:type="gpointer"/>
</array>
</parameter>
</parameters>
</method>
<method name="is_disabled" c:identifier="gst_control_binding_is_disabled">
<doc xml:space="preserve">Check if the control binding is disabled.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the binding is inactive</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_disabled" c:identifier="gst_control_binding_set_disabled">
<doc xml:space="preserve">This function is used to disable a control binding for some time, i.e.
gst_object_sync_values() will do nothing.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="disabled" transfer-ownership="none">
<doc xml:space="preserve">boolean that specifies whether to disable the controller
or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="sync_values" c:identifier="gst_control_binding_sync_values">
<doc xml:space="preserve">Sets the property of the @object, according to the #GstControlSources that
handle them and for the given timestamp.
If this function fails, it is most likely the application developers fault.
Most probably the control sources are not setup correctly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the controller value could be applied to the object
property, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</instance-parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="last_sync" transfer-ownership="none">
<doc xml:space="preserve">the last time this was called</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<property name="name" writable="1" construct-only="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<property name="object" writable="1" construct-only="1" transfer-ownership="none">
<type name="Object"/>
</property>
<field name="parent">
<type name="Object" c:type="GstObject"/>
</field>
<field name="name">
<doc xml:space="preserve">name of the property of this binding</doc>
<type name="utf8" c:type="gchar*"/>
</field>
<field name="pspec">
<doc xml:space="preserve">#GParamSpec for this property</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</field>
<field name="object" readable="0" private="1">
<type name="Object" c:type="GstObject*"/>
</field>
<field name="disabled" readable="0" private="1">
<type name="gboolean" c:type="gboolean"/>
</field>
<union name="ABI" c:type="ABI">
<record name="abi" c:type="abi">
<field name="priv" writable="1">
<type name="ControlBindingPrivate" c:type="GstControlBindingPrivate*"/>
</field>
</record>
<field name="_gst_reserved" writable="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</union>
</class>
<record name="ControlBindingClass" c:type="GstControlBindingClass" glib:is-gtype-struct-for="ControlBinding">
<doc xml:space="preserve">The class structure of #GstControlBinding.</doc>
<field name="parent_class">
<doc xml:space="preserve">Parent class</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="sync_values">
<callback name="sync_values">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the controller value could be applied to the object
property, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="last_sync" transfer-ownership="none">
<doc xml:space="preserve">the last time this was called</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_value">
<callback name="get_value">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GValue of the property at the given time,
or %NULL if the property isn't controlled.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time the control-change should be read from</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_value_array" introspectable="0">
<callback name="get_value_array" introspectable="0">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="3" zero-terminated="0" c:type="gpointer">
<type name="gpointer" c:type="gpointer"/>
</array>
</parameter>
</parameters>
</callback>
</field>
<field name="get_g_value_array">
<callback name="get_g_value_array">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the control binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="3" zero-terminated="0" c:type="GValue*">
<type name="GObject.Value" c:type="GValue"/>
</array>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<callback name="ControlBindingConvert" c:type="GstControlBindingConvert">
<attribute name="doc.skip" value="true"/>
<doc xml:space="preserve">FIXME(2.0): remove, this is unused</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="binding" transfer-ownership="none">
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
<parameter name="src_value" transfer-ownership="none">
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="dest_value" transfer-ownership="none">
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</callback>
<record name="ControlBindingPrivate" c:type="GstControlBindingPrivate" disguised="1"/>
<class name="ControlSource" c:symbol-prefix="control_source" c:type="GstControlSource" parent="Object" abstract="1" glib:type-name="GstControlSource" glib:get-type="gst_control_source_get_type" glib:type-struct="ControlSourceClass">
<doc xml:space="preserve">The #GstControlSource is a base class for control value sources that could
be used to get timestamp-value pairs. A control source essentially is a
function over time.
A #GstControlSource is used by first getting an instance of a specific
control-source, creating a binding for the control-source to the target property
of the element and then adding the binding to the element. The binding will
convert the data types and value range to fit to the bound property.
For implementing a new #GstControlSource one has to implement
#GstControlSourceGetValue and #GstControlSourceGetValueArray functions.
These are then used by gst_control_source_get_value() and
gst_control_source_get_value_array() to get values for specific timestamps.</doc>
<method name="control_source_get_value" c:identifier="gst_control_source_get_value">
<doc xml:space="preserve">Gets the value for this #GstControlSource at a given timestamp.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if the value couldn't be returned, %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="self" transfer-ownership="none">
<doc xml:space="preserve">the #GstControlSource object</doc>
<type name="ControlSource" c:type="GstControlSource*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time for which the value should be returned</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the value</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="control_source_get_value_array" c:identifier="gst_control_source_get_value_array">
<doc xml:space="preserve">Gets an array of values for for this #GstControlSource. Values that are
undefined contain NANs.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="self" transfer-ownership="none">
<doc xml:space="preserve">the #GstControlSource object</doc>
<type name="ControlSource" c:type="GstControlSource*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the first timestamp</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time steps</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values to fetch</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="2" zero-terminated="0" c:type="gdouble*">
<type name="gdouble" c:type="gdouble"/>
</array>
</parameter>
</parameters>
</method>
<field name="parent">
<type name="Object" c:type="GstObject"/>
</field>
<field name="get_value">
<doc xml:space="preserve">Function for returning a value for a given timestamp</doc>
<type name="ControlSourceGetValue" c:type="GstControlSourceGetValue"/>
</field>
<field name="get_value_array">
<doc xml:space="preserve">Function for returning a values array for a given timestamp</doc>
<type name="ControlSourceGetValueArray" c:type="GstControlSourceGetValueArray"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="ControlSourceClass" c:type="GstControlSourceClass" glib:is-gtype-struct-for="ControlSource">
<doc xml:space="preserve">The class structure of #GstControlSource.</doc>
<field name="parent_class">
<doc xml:space="preserve">Parent class</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<callback name="ControlSourceGetValue" c:type="GstControlSourceGetValue">
<doc xml:space="preserve">Function for returning a value for a given timestamp.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value was successfully calculated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="self" transfer-ownership="none">
<doc xml:space="preserve">the #GstControlSource instance</doc>
<type name="ControlSource" c:type="GstControlSource*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">timestamp for which a value should be calculated</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a value which will be set to the result.</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</callback>
<callback name="ControlSourceGetValueArray" c:type="GstControlSourceGetValueArray">
<doc xml:space="preserve">Function for returning an array of values for starting at a given timestamp.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the values were successfully calculated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="self" transfer-ownership="none">
<doc xml:space="preserve">the #GstControlSource instance</doc>
<type name="ControlSource" c:type="GstControlSource*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">timestamp for which a value should be calculated</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</callback>
<enumeration name="CoreError" glib:type-name="GstCoreError" glib:get-type="gst_core_error_get_type" c:type="GstCoreError" glib:error-domain="gst-core-error-quark">
<doc xml:space="preserve">Core errors are errors inside the core GStreamer library.</doc>
<member name="failed" value="1" c:identifier="GST_CORE_ERROR_FAILED" glib:nick="failed">
<doc xml:space="preserve">a general error which doesn't fit in any other
category. Make sure you add a custom message to the error call.</doc>
</member>
<member name="too_lazy" value="2" c:identifier="GST_CORE_ERROR_TOO_LAZY" glib:nick="too-lazy">
<doc xml:space="preserve">do not use this except as a placeholder for
deciding where to go while developing code.</doc>
</member>
<member name="not_implemented" value="3" c:identifier="GST_CORE_ERROR_NOT_IMPLEMENTED" glib:nick="not-implemented">
<doc xml:space="preserve">use this when you do not want to implement
this functionality yet.</doc>
</member>
<member name="state_change" value="4" c:identifier="GST_CORE_ERROR_STATE_CHANGE" glib:nick="state-change">
<doc xml:space="preserve">used for state change errors.</doc>
</member>
<member name="pad" value="5" c:identifier="GST_CORE_ERROR_PAD" glib:nick="pad">
<doc xml:space="preserve">used for pad-related errors.</doc>
</member>
<member name="thread" value="6" c:identifier="GST_CORE_ERROR_THREAD" glib:nick="thread">
<doc xml:space="preserve">used for thread-related errors.</doc>
</member>
<member name="negotiation" value="7" c:identifier="GST_CORE_ERROR_NEGOTIATION" glib:nick="negotiation">
<doc xml:space="preserve">used for negotiation-related errors.</doc>
</member>
<member name="event" value="8" c:identifier="GST_CORE_ERROR_EVENT" glib:nick="event">
<doc xml:space="preserve">used for event-related errors.</doc>
</member>
<member name="seek" value="9" c:identifier="GST_CORE_ERROR_SEEK" glib:nick="seek">
<doc xml:space="preserve">used for seek-related errors.</doc>
</member>
<member name="caps" value="10" c:identifier="GST_CORE_ERROR_CAPS" glib:nick="caps">
<doc xml:space="preserve">used for caps-related errors.</doc>
</member>
<member name="tag" value="11" c:identifier="GST_CORE_ERROR_TAG" glib:nick="tag">
<doc xml:space="preserve">used for negotiation-related errors.</doc>
</member>
<member name="missing_plugin" value="12" c:identifier="GST_CORE_ERROR_MISSING_PLUGIN" glib:nick="missing-plugin">
<doc xml:space="preserve">used if a plugin is missing.</doc>
</member>
<member name="clock" value="13" c:identifier="GST_CORE_ERROR_CLOCK" glib:nick="clock">
<doc xml:space="preserve">used for clock related errors.</doc>
</member>
<member name="disabled" value="14" c:identifier="GST_CORE_ERROR_DISABLED" glib:nick="disabled">
<doc xml:space="preserve">used if functionality has been disabled at
compile time.</doc>
</member>
<member name="num_errors" value="15" c:identifier="GST_CORE_ERROR_NUM_ERRORS" glib:nick="num-errors">
<doc xml:space="preserve">the number of core error types.</doc>
</member>
<function name="quark" c:identifier="gst_core_error_quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<constant name="DEBUG_BG_MASK" value="240" c:type="GST_DEBUG_BG_MASK">
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="DEBUG_BIN_TO_DOT_FILE" c:identifier="GST_DEBUG_BIN_TO_DOT_FILE" introspectable="0">
<doc xml:space="preserve">To aid debugging applications one can use this method to write out the whole
network of gstreamer elements that form the pipeline into an dot file.
This file can be processed with graphviz to get an image, like this:
|[
dot -Tpng -oimage.png graph_lowlevel.dot
]|
There is also a utility called xdot which allows you to view the dot file
directly without converting it first.
The macro is only active if the environment variable GST_DEBUG_DUMP_DOT_DIR
is set to a basepath (e.g. /tmp), and the GStreamer debugging subsystem is
enabled (i.e., no use of `./configure --disable-gst-debug')</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">the top-level pipeline that should be analyzed</doc>
</parameter>
<parameter name="details">
<doc xml:space="preserve">details to show in the graph, e.g. #GST_DEBUG_GRAPH_SHOW_ALL or
one or more other #GstDebugGraphDetails flags.</doc>
</parameter>
<parameter name="file_name">
<doc xml:space="preserve">output base filename (e.g. "myplayer")</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_BIN_TO_DOT_FILE_WITH_TS" c:identifier="GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS" introspectable="0">
<doc xml:space="preserve">This works like GST_DEBUG_BIN_TO_DOT_FILE(), but adds the current timestamp
to the filename, so that it can be used to take multiple snapshots.</doc>
<parameters>
<parameter name="bin">
<doc xml:space="preserve">the top-level pipeline that should be analyzed</doc>
</parameter>
<parameter name="details">
<doc xml:space="preserve">details to show in the graph, e.g. #GST_DEBUG_GRAPH_SHOW_ALL or
one or more other #GstDebugGraphDetails flags.</doc>
</parameter>
<parameter name="file_name">
<doc xml:space="preserve">output base filename (e.g. "myplayer")</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_CATEGORY" c:identifier="GST_DEBUG_CATEGORY" introspectable="0">
<doc xml:space="preserve">Defines a GstDebugCategory variable.
This macro expands to nothing if debugging is disabled.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">the category</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_CATEGORY_EXTERN" c:identifier="GST_DEBUG_CATEGORY_EXTERN" introspectable="0">
<doc xml:space="preserve">Declares a GstDebugCategory variable as extern. Use in header files.
This macro expands to nothing if debugging is disabled.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">the category</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_CATEGORY_GET" c:identifier="GST_DEBUG_CATEGORY_GET" introspectable="0">
<doc xml:space="preserve">Looks up an existing #GstDebugCategory by its @name and sets @cat. If the
category is not found, but GST_CAT_DEFAULT is defined, that is assigned to
@cat. Otherwise @cat will be %NULL.
|[&lt;!-- language="C" --&gt;
GST_DEBUG_CATEGORY_STATIC (gst_myplugin_debug);
#define GST_CAT_DEFAULT gst_myplugin_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_PERFORMANCE);
...
GST_DEBUG_CATEGORY_INIT (gst_myplugin_debug, "myplugin", 0, "nice element");
GST_DEBUG_CATEGORY_GET (GST_CAT_PERFORMANCE, "GST_PERFORMANCE");
]|</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">the category to initialize.</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">log category name</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_CATEGORY_INIT" c:identifier="GST_DEBUG_CATEGORY_INIT" introspectable="0">
<doc xml:space="preserve">Initializes a new #GstDebugCategory with the given properties and set to
the default threshold.
&gt; This macro expands to nothing if debugging is disabled.
&gt;
&gt; When naming your category, please follow the following conventions to ensure
&gt; that the pattern matching for categories works as expected. It is not
&gt; earth-shattering if you don't follow these conventions, but it would be nice
&gt; for everyone.
&gt;
&gt; If you define a category for a plugin or a feature of it, name the category
&gt; like the feature. So if you wanted to write a "filesrc" element, you would
&gt; name the category "filesrc". Use lowercase letters only.
&gt; If you define more than one category for the same element, append an
&gt; underscore and an identifier to your categories, like this: "filesrc_cache"
&gt;
&gt; If you create a library or an application using debugging categories, use a
&gt; common prefix followed by an underscore for all your categories. GStreamer
&gt; uses the GST prefix so GStreamer categories look like "GST_STATES". Be sure
&gt; to include uppercase letters.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">the category to initialize.</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">the name of the category.</doc>
</parameter>
<parameter name="color">
<doc xml:space="preserve">the colors to use for a color representation or 0 for no color.</doc>
</parameter>
<parameter name="description">
<doc xml:space="preserve">optional description of the category.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_CATEGORY_STATIC" c:identifier="GST_DEBUG_CATEGORY_STATIC" introspectable="0">
<doc xml:space="preserve">Defines a static GstDebugCategory variable.
This macro expands to nothing if debugging is disabled.</doc>
<parameters>
<parameter name="cat">
<doc xml:space="preserve">the category</doc>
</parameter>
</parameters>
</function-macro>
<constant name="DEBUG_FG_MASK" value="15" c:type="GST_DEBUG_FG_MASK">
<type name="gint" c:type="gint"/>
</constant>
<constant name="DEBUG_FORMAT_MASK" value="65280" c:type="GST_DEBUG_FORMAT_MASK">
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="DEBUG_FUNCPTR" c:identifier="GST_DEBUG_FUNCPTR" introspectable="0">
<doc xml:space="preserve">Register a pointer to a function with its name, so it can later be used by
GST_DEBUG_FUNCPTR_NAME().</doc>
<parameters>
<parameter name="ptr">
<doc xml:space="preserve">pointer to the function to register</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_FUNCPTR_NAME" c:identifier="GST_DEBUG_FUNCPTR_NAME" introspectable="0">
<doc xml:space="preserve">Retrieves the name of the function, if it was previously registered with
GST_DEBUG_FUNCPTR(). If not, it returns a description of the pointer.
This macro returns a constant string which must not be modified or
freed by the caller.</doc>
<parameters>
<parameter name="ptr">
<doc xml:space="preserve">address of the function of which to look up the name</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_PAD_NAME" c:identifier="GST_DEBUG_PAD_NAME" introspectable="0">
<doc xml:space="preserve">Evaluates to 2 strings, that describe the pad. Often used in debugging
statements.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">The pad to debug.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEBUG_REGISTER_FUNCPTR" c:identifier="GST_DEBUG_REGISTER_FUNCPTR" introspectable="0">
<doc xml:space="preserve">Register a pointer to a function with its name, so it can later be used by
GST_DEBUG_FUNCPTR_NAME().
Use this variant of #GST_DEBUG_FUNCPTR if you do not need to use @ptr.</doc>
<parameters>
<parameter name="ptr">
<doc xml:space="preserve">pointer to the function to register</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEFINE_MINI_OBJECT_TYPE" c:identifier="GST_DEFINE_MINI_OBJECT_TYPE" introspectable="0">
<doc xml:space="preserve">Define a new mini-object type with the given name</doc>
<parameters>
<parameter name="TypeName">
<doc xml:space="preserve">name of the new type in CamelCase</doc>
</parameter>
<parameter name="type_name">
<doc xml:space="preserve">name of the new type</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE" c:identifier="GST_DEVICE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_CAST" c:identifier="GST_DEVICE_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_CLASS" c:identifier="GST_DEVICE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_GET_CLASS" c:identifier="GST_DEVICE_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_MONITOR" c:identifier="GST_DEVICE_MONITOR" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_MONITOR_CAST" c:identifier="GST_DEVICE_MONITOR_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_MONITOR_CLASS" c:identifier="GST_DEVICE_MONITOR_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_MONITOR_GET_CLASS" c:identifier="GST_DEVICE_MONITOR_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER" c:identifier="GST_DEVICE_PROVIDER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_CAST" c:identifier="GST_DEVICE_PROVIDER_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_CLASS" c:identifier="GST_DEVICE_PROVIDER_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_FACTORY" c:identifier="GST_DEVICE_PROVIDER_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_FACTORY_CAST" c:identifier="GST_DEVICE_PROVIDER_FACTORY_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_FACTORY_CLASS" c:identifier="GST_DEVICE_PROVIDER_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="DEVICE_PROVIDER_GET_CLASS" c:identifier="GST_DEVICE_PROVIDER_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DYNAMIC_TYPE_CLASS" c:identifier="GST_DYNAMIC_TYPE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="DYNAMIC_TYPE_FACTORY" c:identifier="GST_DYNAMIC_TYPE_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="DYNAMIC_TYPE_FACTORY_CAST" c:identifier="GST_DYNAMIC_TYPE_FACTORY_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<record name="DateTime" c:type="GstDateTime" glib:type-name="GstDateTime" glib:get-type="gst_date_time_get_type" c:symbol-prefix="date_time">
<doc xml:space="preserve">Struct to store date, time and timezone information altogether.
#GstDateTime is refcounted and immutable.
Date information is handled using the proleptic Gregorian calendar.
Provides basic creation functions and accessor functions to its fields.</doc>
<constructor name="new" c:identifier="gst_date_time_new">
<doc xml:space="preserve">Creates a new #GstDateTime using the date and times in the gregorian calendar
in the supplied timezone.
@year should be from 1 to 9999, @month should be from 1 to 12, @day from
1 to 31, @hour from 0 to 23, @minutes and @seconds from 0 to 59.
Note that @tzoffset is a float and was chosen so for being able to handle
some fractional timezones, while it still keeps the readability of
representing it in hours for most timezones.
If value is -1 then all over value will be ignored. For example
if @month == -1, then #GstDateTime will created only for @year. If
@day == -1, then #GstDateTime will created for @year and @month and
so on.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="tzoffset" transfer-ownership="none">
<doc xml:space="preserve">Offset from UTC in hours.</doc>
<type name="gfloat" c:type="gfloat"/>
</parameter>
<parameter name="year" transfer-ownership="none">
<doc xml:space="preserve">the gregorian year</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="month" transfer-ownership="none">
<doc xml:space="preserve">the gregorian month</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="day" transfer-ownership="none">
<doc xml:space="preserve">the day of the gregorian month</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="hour" transfer-ownership="none">
<doc xml:space="preserve">the hour of the day</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="minute" transfer-ownership="none">
<doc xml:space="preserve">the minute of the hour</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="seconds" transfer-ownership="none">
<doc xml:space="preserve">the second of the minute</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_g_date_time" c:identifier="gst_date_time_new_from_g_date_time">
<doc xml:space="preserve">Creates a new #GstDateTime from a #GDateTime object.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created #GstDateTime,
or %NULL on error</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="dt" transfer-ownership="full">
<doc xml:space="preserve">the #GDateTime. The new #GstDateTime takes ownership.</doc>
<type name="GLib.DateTime" c:type="GDateTime*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_iso8601_string" c:identifier="gst_date_time_new_from_iso8601_string">
<doc xml:space="preserve">Tries to parse common variants of ISO-8601 datetime strings into a
#GstDateTime. Possible input formats are (for example):
2012-06-30T22:46:43Z, 2012, 2012-06, 2012-06-30, 2012-06-30T22:46:43-0430,
2012-06-30T22:46Z, 2012-06-30T22:46-0430, 2012-06-30 22:46,
2012-06-30 22:46:43, 2012-06-00, 2012-00-00, 2012-00-30, 22:46:43Z, 22:46Z,
22:46:43-0430, 22:46-0430, 22:46:30, 22:46
If no date is provided, it is assumed to be "today" in the timezone
provided (if any), otherwise UTC.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created #GstDateTime,
or %NULL on error</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="string" transfer-ownership="none">
<doc xml:space="preserve">ISO 8601-formatted datetime string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_unix_epoch_local_time" c:identifier="gst_date_time_new_from_unix_epoch_local_time">
<doc xml:space="preserve">Creates a new #GstDateTime using the time since Jan 1, 1970 specified by
@secs. The #GstDateTime is in the local timezone.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="secs" transfer-ownership="none">
<doc xml:space="preserve">seconds from the Unix epoch</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_unix_epoch_local_time_usecs" c:identifier="gst_date_time_new_from_unix_epoch_local_time_usecs" version="1.18">
<doc xml:space="preserve">Creates a new #GstDateTime using the time since Jan 1, 1970 specified by
@usecs. The #GstDateTime is in the local timezone.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="usecs" transfer-ownership="none">
<doc xml:space="preserve">microseconds from the Unix epoch</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_unix_epoch_utc" c:identifier="gst_date_time_new_from_unix_epoch_utc">
<doc xml:space="preserve">Creates a new #GstDateTime using the time since Jan 1, 1970 specified by
@secs. The #GstDateTime is in the UTC timezone.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="secs" transfer-ownership="none">
<doc xml:space="preserve">seconds from the Unix epoch</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_unix_epoch_utc_usecs" c:identifier="gst_date_time_new_from_unix_epoch_utc_usecs" version="1.18">
<doc xml:space="preserve">Creates a new #GstDateTime using the time since Jan 1, 1970 specified by
@usecs. The #GstDateTime is in UTC.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="usecs" transfer-ownership="none">
<doc xml:space="preserve">microseconds from the Unix epoch</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_local_time" c:identifier="gst_date_time_new_local_time">
<doc xml:space="preserve">Creates a new #GstDateTime using the date and times in the gregorian calendar
in the local timezone.
@year should be from 1 to 9999, @month should be from 1 to 12, @day from
1 to 31, @hour from 0 to 23, @minutes and @seconds from 0 to 59.
If @month is -1, then the #GstDateTime created will only contain @year,
and all other fields will be considered not set.
If @day is -1, then the #GstDateTime created will only contain @year and
@month and all other fields will be considered not set.
If @hour is -1, then the #GstDateTime created will only contain @year and
@month and @day, and the time fields will be considered not set. In this
case @minute and @seconds should also be -1.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="year" transfer-ownership="none">
<doc xml:space="preserve">the gregorian year</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="month" transfer-ownership="none">
<doc xml:space="preserve">the gregorian month, or -1</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="day" transfer-ownership="none">
<doc xml:space="preserve">the day of the gregorian month, or -1</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="hour" transfer-ownership="none">
<doc xml:space="preserve">the hour of the day, or -1</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="minute" transfer-ownership="none">
<doc xml:space="preserve">the minute of the hour, or -1</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="seconds" transfer-ownership="none">
<doc xml:space="preserve">the second of the minute, or -1</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_now_local_time" c:identifier="gst_date_time_new_now_local_time">
<doc xml:space="preserve">Creates a new #GstDateTime representing the current date and time.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the newly created #GstDateTime which should
be freed with gst_date_time_unref().</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
</constructor>
<constructor name="new_now_utc" c:identifier="gst_date_time_new_now_utc">
<doc xml:space="preserve">Creates a new #GstDateTime that represents the current instant at Universal
coordinated time.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the newly created #GstDateTime which should
be freed with gst_date_time_unref().</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
</constructor>
<constructor name="new_y" c:identifier="gst_date_time_new_y">
<doc xml:space="preserve">Creates a new #GstDateTime using the date and times in the gregorian calendar
in the local timezone.
@year should be from 1 to 9999.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="year" transfer-ownership="none">
<doc xml:space="preserve">the gregorian year</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_ym" c:identifier="gst_date_time_new_ym">
<doc xml:space="preserve">Creates a new #GstDateTime using the date and times in the gregorian calendar
in the local timezone.
@year should be from 1 to 9999, @month should be from 1 to 12.
If value is -1 then all over value will be ignored. For example
if @month == -1, then #GstDateTime will created only for @year.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="year" transfer-ownership="none">
<doc xml:space="preserve">the gregorian year</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="month" transfer-ownership="none">
<doc xml:space="preserve">the gregorian month</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_ymd" c:identifier="gst_date_time_new_ymd">
<doc xml:space="preserve">Creates a new #GstDateTime using the date and times in the gregorian calendar
in the local timezone.
@year should be from 1 to 9999, @month should be from 1 to 12, @day from
1 to 31.
If value is -1 then all over value will be ignored. For example
if @month == -1, then #GstDateTime will created only for @year. If
@day == -1, then #GstDateTime will created for @year and @month and
so on.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the newly created #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<parameter name="year" transfer-ownership="none">
<doc xml:space="preserve">the gregorian year</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="month" transfer-ownership="none">
<doc xml:space="preserve">the gregorian month</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="day" transfer-ownership="none">
<doc xml:space="preserve">the day of the gregorian month</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</constructor>
<method name="get_day" c:identifier="gst_date_time_get_day">
<doc xml:space="preserve">Returns the day of the month of this #GstDateTime.
Call gst_date_time_has_day() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The day of this #GstDateTime</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_hour" c:identifier="gst_date_time_get_hour">
<doc xml:space="preserve">Retrieves the hour of the day represented by @datetime in the gregorian
calendar. The return is in the range of 0 to 23.
Call gst_date_time_has_time() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the hour of the day</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_microsecond" c:identifier="gst_date_time_get_microsecond">
<doc xml:space="preserve">Retrieves the fractional part of the seconds in microseconds represented by
@datetime in the gregorian calendar.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the microsecond of the second</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_minute" c:identifier="gst_date_time_get_minute">
<doc xml:space="preserve">Retrieves the minute of the hour represented by @datetime in the gregorian
calendar.
Call gst_date_time_has_time() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the minute of the hour</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_month" c:identifier="gst_date_time_get_month">
<doc xml:space="preserve">Returns the month of this #GstDateTime. January is 1, February is 2, etc..
Call gst_date_time_has_month() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The month of this #GstDateTime</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_second" c:identifier="gst_date_time_get_second">
<doc xml:space="preserve">Retrieves the second of the minute represented by @datetime in the gregorian
calendar.
Call gst_date_time_has_time() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the second represented by @datetime</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_time_zone_offset" c:identifier="gst_date_time_get_time_zone_offset">
<doc xml:space="preserve">Retrieves the offset from UTC in hours that the timezone specified
by @datetime represents. Timezones ahead (to the east) of UTC have positive
values, timezones before (to the west) of UTC have negative values.
If @datetime represents UTC time, then the offset is zero.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the offset from UTC in hours</doc>
<type name="gfloat" c:type="gfloat"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_year" c:identifier="gst_date_time_get_year">
<doc xml:space="preserve">Returns the year of this #GstDateTime
Call gst_date_time_has_year() before, to avoid warnings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The year of this #GstDateTime</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_day" c:identifier="gst_date_time_has_day">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @datetime&lt;!-- --&gt;'s day field is set, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_month" c:identifier="gst_date_time_has_month">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @datetime&lt;!-- --&gt;'s month field is set, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_second" c:identifier="gst_date_time_has_second">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @datetime&lt;!-- --&gt;'s second field is set, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_time" c:identifier="gst_date_time_has_time">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @datetime&lt;!-- --&gt;'s hour and minute fields are set,
otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_year" c:identifier="gst_date_time_has_year">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @datetime&lt;!-- --&gt;'s year field is set (which should always
be the case), otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="const GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_date_time_ref">
<doc xml:space="preserve">Atomically increments the reference count of @datetime by one.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the reference @datetime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="to_g_date_time" c:identifier="gst_date_time_to_g_date_time">
<doc xml:space="preserve">Creates a new #GDateTime from a fully defined #GstDateTime object.
Free-function: g_date_time_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created #GDateTime, or
%NULL on error</doc>
<type name="GLib.DateTime" c:type="GDateTime*"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">GstDateTime.</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="to_iso8601_string" c:identifier="gst_date_time_to_iso8601_string">
<doc xml:space="preserve">Create a minimal string compatible with ISO-8601. Possible output formats
are (for example): 2012, 2012-06, 2012-06-23, 2012-06-23T23:30Z,
2012-06-23T23:30+0100, 2012-06-23T23:30:59Z, 2012-06-23T23:30:59+0100</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly allocated string formatted according
to ISO 8601 and only including the datetime fields that are
valid, or %NULL in case there was an error. The string should
be freed with g_free().</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="none">
<doc xml:space="preserve">GstDateTime.</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_date_time_unref">
<doc xml:space="preserve">Atomically decrements the reference count of @datetime by one. When the
reference count reaches zero, the structure is freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="datetime" transfer-ownership="full">
<doc xml:space="preserve">a #GstDateTime</doc>
<type name="DateTime" c:type="GstDateTime*"/>
</instance-parameter>
</parameters>
</method>
</record>
<record name="DebugCategory" c:type="GstDebugCategory">
<doc xml:space="preserve">This is the struct that describes the categories. Once initialized with
#GST_DEBUG_CATEGORY_INIT, its values can't be changed anymore.</doc>
<field name="threshold" readable="0" private="1">
<type name="gint" c:type="gint"/>
</field>
<field name="color" readable="0" private="1">
<type name="guint" c:type="guint"/>
</field>
<field name="name" readable="0" private="1">
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="description" readable="0" private="1">
<type name="utf8" c:type="const gchar*"/>
</field>
<method name="free" c:identifier="gst_debug_category_free" deprecated="1">
<doc xml:space="preserve">Removes and frees the category and all associated resources.</doc>
<doc-deprecated xml:space="preserve">This function can easily cause memory corruption, don't use it.</doc-deprecated>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">#GstDebugCategory to free.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_color" c:identifier="gst_debug_category_get_color">
<doc xml:space="preserve">Returns the color of a debug category used when printing output in this
category.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the color of the category.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to get the color of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_description" c:identifier="gst_debug_category_get_description">
<doc xml:space="preserve">Returns the description of a debug category.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the description of the category.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to get the description of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_name" c:identifier="gst_debug_category_get_name">
<doc xml:space="preserve">Returns the name of a debug category.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name of the category.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to get name of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_threshold" c:identifier="gst_debug_category_get_threshold">
<doc xml:space="preserve">Returns the threshold of a #GstDebugCategory.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstDebugLevel that is used as threshold.</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to get threshold of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="reset_threshold" c:identifier="gst_debug_category_reset_threshold">
<doc xml:space="preserve">Resets the threshold of the category to the default level. Debug information
will only be output if the threshold is lower or equal to the level of the
debugging message.
Use this function to set the threshold back to where it was after using
gst_debug_category_set_threshold().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to reset threshold of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_threshold" c:identifier="gst_debug_category_set_threshold">
<doc xml:space="preserve">Sets the threshold of the category to the given level. Debug information will
only be output if the threshold is lower or equal to the level of the
debugging message.
&gt; Do not use this function in production code, because other functions may
&gt; change the threshold of categories as side effect. It is however a nice
&gt; function to use when debugging (even from gdb).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory to set threshold of.</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</instance-parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">the #GstDebugLevel threshold to set.</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
</parameters>
</method>
</record>
<bitfield name="DebugColorFlags" glib:type-name="GstDebugColorFlags" glib:get-type="gst_debug_color_flags_get_type" c:type="GstDebugColorFlags">
<doc xml:space="preserve">These are some terminal style flags you can use when creating your
debugging categories to make them stand out in debugging output.</doc>
<member name="fg_black" value="0" c:identifier="GST_DEBUG_FG_BLACK" glib:nick="fg-black">
<doc xml:space="preserve">Use black as foreground color.</doc>
</member>
<member name="fg_red" value="1" c:identifier="GST_DEBUG_FG_RED" glib:nick="fg-red">
<doc xml:space="preserve">Use red as foreground color.</doc>
</member>
<member name="fg_green" value="2" c:identifier="GST_DEBUG_FG_GREEN" glib:nick="fg-green">
<doc xml:space="preserve">Use green as foreground color.</doc>
</member>
<member name="fg_yellow" value="3" c:identifier="GST_DEBUG_FG_YELLOW" glib:nick="fg-yellow">
<doc xml:space="preserve">Use yellow as foreground color.</doc>
</member>
<member name="fg_blue" value="4" c:identifier="GST_DEBUG_FG_BLUE" glib:nick="fg-blue">
<doc xml:space="preserve">Use blue as foreground color.</doc>
</member>
<member name="fg_magenta" value="5" c:identifier="GST_DEBUG_FG_MAGENTA" glib:nick="fg-magenta">
<doc xml:space="preserve">Use magenta as foreground color.</doc>
</member>
<member name="fg_cyan" value="6" c:identifier="GST_DEBUG_FG_CYAN" glib:nick="fg-cyan">
<doc xml:space="preserve">Use cyan as foreground color.</doc>
</member>
<member name="fg_white" value="7" c:identifier="GST_DEBUG_FG_WHITE" glib:nick="fg-white">
<doc xml:space="preserve">Use white as foreground color.</doc>
</member>
<member name="bg_black" value="0" c:identifier="GST_DEBUG_BG_BLACK" glib:nick="bg-black">
<doc xml:space="preserve">Use black as background color.</doc>
</member>
<member name="bg_red" value="16" c:identifier="GST_DEBUG_BG_RED" glib:nick="bg-red">
<doc xml:space="preserve">Use red as background color.</doc>
</member>
<member name="bg_green" value="32" c:identifier="GST_DEBUG_BG_GREEN" glib:nick="bg-green">
<doc xml:space="preserve">Use green as background color.</doc>
</member>
<member name="bg_yellow" value="48" c:identifier="GST_DEBUG_BG_YELLOW" glib:nick="bg-yellow">
<doc xml:space="preserve">Use yellow as background color.</doc>
</member>
<member name="bg_blue" value="64" c:identifier="GST_DEBUG_BG_BLUE" glib:nick="bg-blue">
<doc xml:space="preserve">Use blue as background color.</doc>
</member>
<member name="bg_magenta" value="80" c:identifier="GST_DEBUG_BG_MAGENTA" glib:nick="bg-magenta">
<doc xml:space="preserve">Use magenta as background color.</doc>
</member>
<member name="bg_cyan" value="96" c:identifier="GST_DEBUG_BG_CYAN" glib:nick="bg-cyan">
<doc xml:space="preserve">Use cyan as background color.</doc>
</member>
<member name="bg_white" value="112" c:identifier="GST_DEBUG_BG_WHITE" glib:nick="bg-white">
<doc xml:space="preserve">Use white as background color.</doc>
</member>
<member name="bold" value="256" c:identifier="GST_DEBUG_BOLD" glib:nick="bold">
<doc xml:space="preserve">Make the output bold.</doc>
</member>
<member name="underline" value="512" c:identifier="GST_DEBUG_UNDERLINE" glib:nick="underline">
<doc xml:space="preserve">Underline the output.</doc>
</member>
</bitfield>
<enumeration name="DebugColorMode" glib:type-name="GstDebugColorMode" glib:get-type="gst_debug_color_mode_get_type" c:type="GstDebugColorMode">
<member name="off" value="0" c:identifier="GST_DEBUG_COLOR_MODE_OFF" glib:nick="off">
<doc xml:space="preserve">Do not use colors in logs.</doc>
</member>
<member name="on" value="1" c:identifier="GST_DEBUG_COLOR_MODE_ON" glib:nick="on">
<doc xml:space="preserve">Paint logs in a platform-specific way.</doc>
</member>
<member name="unix" value="2" c:identifier="GST_DEBUG_COLOR_MODE_UNIX" glib:nick="unix">
<doc xml:space="preserve">Paint logs with UNIX terminal color codes
no matter what platform GStreamer is running on.</doc>
</member>
</enumeration>
<callback name="DebugFuncPtr" c:type="GstDebugFuncPtr">
<attribute name="doc.skip" value="true"/>
<doc xml:space="preserve">we define this to avoid a compiler warning regarding a cast from a function
pointer to a void pointer
(see https://bugzilla.gnome.org/show_bug.cgi?id=309253)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</callback>
<bitfield name="DebugGraphDetails" glib:type-name="GstDebugGraphDetails" glib:get-type="gst_debug_graph_details_get_type" c:type="GstDebugGraphDetails">
<doc xml:space="preserve">Available details for pipeline graphs produced by GST_DEBUG_BIN_TO_DOT_FILE()
and GST_DEBUG_BIN_TO_DOT_FILE_WITH_TS().</doc>
<member name="media_type" value="1" c:identifier="GST_DEBUG_GRAPH_SHOW_MEDIA_TYPE" glib:nick="media-type">
<doc xml:space="preserve">show caps-name on edges</doc>
</member>
<member name="caps_details" value="2" c:identifier="GST_DEBUG_GRAPH_SHOW_CAPS_DETAILS" glib:nick="caps-details">
<doc xml:space="preserve">show caps-details on edges</doc>
</member>
<member name="non_default_params" value="4" c:identifier="GST_DEBUG_GRAPH_SHOW_NON_DEFAULT_PARAMS" glib:nick="non-default-params">
<doc xml:space="preserve">show modified parameters on
elements</doc>
</member>
<member name="states" value="8" c:identifier="GST_DEBUG_GRAPH_SHOW_STATES" glib:nick="states">
<doc xml:space="preserve">show element states</doc>
</member>
<member name="full_params" value="16" c:identifier="GST_DEBUG_GRAPH_SHOW_FULL_PARAMS" glib:nick="full-params">
<doc xml:space="preserve">show full element parameter values even
if they are very long</doc>
</member>
<member name="all" value="15" c:identifier="GST_DEBUG_GRAPH_SHOW_ALL" glib:nick="all">
<doc xml:space="preserve">show all the typical details that one might want</doc>
</member>
<member name="verbose" value="4294967295" c:identifier="GST_DEBUG_GRAPH_SHOW_VERBOSE" glib:nick="verbose">
<doc xml:space="preserve">show all details regardless of how large or
verbose they make the resulting output</doc>
</member>
</bitfield>
<enumeration name="DebugLevel" glib:type-name="GstDebugLevel" glib:get-type="gst_debug_level_get_type" c:type="GstDebugLevel">
<doc xml:space="preserve">The level defines the importance of a debugging message. The more important a
message is, the greater the probability that the debugging system outputs it.</doc>
<member name="none" value="0" c:identifier="GST_LEVEL_NONE" glib:nick="none">
<doc xml:space="preserve">No debugging level specified or desired. Used to deactivate
debugging output.</doc>
</member>
<member name="error" value="1" c:identifier="GST_LEVEL_ERROR" glib:nick="error">
<doc xml:space="preserve">Error messages are to be used only when an error occurred
that stops the application from keeping working correctly.
An examples is gst_element_error, which outputs a message with this priority.
It does not mean that the application is terminating as with g_error.</doc>
</member>
<member name="warning" value="2" c:identifier="GST_LEVEL_WARNING" glib:nick="warning">
<doc xml:space="preserve">Warning messages are to inform about abnormal behaviour
that could lead to problems or weird behaviour later on. An example of this
would be clocking issues ("your computer is pretty slow") or broken input
data ("Can't synchronize to stream.")</doc>
</member>
<member name="fixme" value="3" c:identifier="GST_LEVEL_FIXME" glib:nick="fixme">
<doc xml:space="preserve">Fixme messages are messages that indicate that something
in the executed code path is not fully implemented or handled yet. Note
that this does not replace proper error handling in any way, the purpose
of this message is to make it easier to spot incomplete/unfinished pieces
of code when reading the debug log.</doc>
</member>
<member name="info" value="4" c:identifier="GST_LEVEL_INFO" glib:nick="info">
<doc xml:space="preserve">Informational messages should be used to keep the developer
updated about what is happening.
Examples where this should be used are when a typefind function has
successfully determined the type of the stream or when an mp3 plugin detects
the format to be used. ("This file has mono sound.")</doc>
</member>
<member name="debug" value="5" c:identifier="GST_LEVEL_DEBUG" glib:nick="debug">
<doc xml:space="preserve">Debugging messages should be used when something common
happens that is not the expected default behavior, or something that's
useful to know but doesn't happen all the time (ie. per loop iteration or
buffer processed or event handled).
An example would be notifications about state changes or receiving/sending
of events.</doc>
</member>
<member name="log" value="6" c:identifier="GST_LEVEL_LOG" glib:nick="log">
<doc xml:space="preserve">Log messages are messages that are very common but might be
useful to know. As a rule of thumb a pipeline that is running as expected
should never output anything else but LOG messages whilst processing data.
Use this log level to log recurring information in chain functions and
loop functions, for example.</doc>
</member>
<member name="trace" value="7" c:identifier="GST_LEVEL_TRACE" glib:nick="trace">
<doc xml:space="preserve">Tracing-related messages.
Examples for this are referencing/dereferencing of objects.</doc>
</member>
<member name="memdump" value="9" c:identifier="GST_LEVEL_MEMDUMP" glib:nick="memdump">
<doc xml:space="preserve">memory dump messages are used to log (small) chunks of
data as memory dumps in the log. They will be displayed as hexdump with
ASCII characters.</doc>
</member>
<member name="count" value="10" c:identifier="GST_LEVEL_COUNT" glib:nick="count">
<doc xml:space="preserve">The number of defined debugging levels.</doc>
</member>
<function name="get_name" c:identifier="gst_debug_level_get_name">
<doc xml:space="preserve">Get the string representation of a debugging level</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">the level to get the name for</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
</parameters>
</function>
</enumeration>
<record name="DebugMessage" c:type="GstDebugMessage" disguised="1">
<method name="get" c:identifier="gst_debug_message_get">
<doc xml:space="preserve">Gets the string representation of a #GstDebugMessage. This function is used
in debug handlers to extract the message.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the string representation of a #GstDebugMessage.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a debug message</doc>
<type name="DebugMessage" c:type="GstDebugMessage*"/>
</instance-parameter>
</parameters>
</method>
</record>
<class name="Device" c:symbol-prefix="device" c:type="GstDevice" version="1.4" parent="Object" abstract="1" glib:type-name="GstDevice" glib:get-type="gst_device_get_type" glib:type-struct="DeviceClass">
<doc xml:space="preserve">#GstDevice are objects representing a device, they contain
relevant metadata about the device, such as its class and the #GstCaps
representing the media types it can produce or handle.
#GstDevice are created by #GstDeviceProvider objects which can be
aggregated by #GstDeviceMonitor objects.</doc>
<virtual-method name="create_element" invoker="create_element" version="1.4">
<doc xml:space="preserve">Creates the element with all of the required parameters set to use
this device.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstElement configured to use
this device</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new element, or %NULL to automatically
create a unique name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="reconfigure_element" invoker="reconfigure_element" version="1.4">
<doc xml:space="preserve">Tries to reconfigure an existing element to use the device. If this
function fails, then one must destroy the element and create a new one
using gst_device_create_element().
Note: This should only be implemented for elements can change their
device in the PLAYING state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element could be reconfigured to use this device,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</virtual-method>
<method name="create_element" c:identifier="gst_device_create_element" version="1.4">
<doc xml:space="preserve">Creates the element with all of the required parameters set to use
this device.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstElement configured to use
this device</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new element, or %NULL to automatically
create a unique name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_caps" c:identifier="gst_device_get_caps" version="1.4">
<doc xml:space="preserve">Getter for the #GstCaps that this device supports.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The #GstCaps supported by this device. Unref with
gst_caps_unref() when done.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_device_class" c:identifier="gst_device_get_device_class" version="1.4">
<doc xml:space="preserve">Gets the "class" of a device. This is a "/" separated list of
classes that represent this device. They are a subset of the
classes of the #GstDeviceProvider that produced this device.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The device class. Free with g_free() after use.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_display_name" c:identifier="gst_device_get_display_name" version="1.4">
<doc xml:space="preserve">Gets the user-friendly name of the device.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The device name. Free with g_free() after use.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_properties" c:identifier="gst_device_get_properties" version="1.6">
<doc xml:space="preserve">Gets the extra properties of a device.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The extra properties or %NULL when there are none.
Free with gst_structure_free() after use.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_classes" c:identifier="gst_device_has_classes" version="1.4">
<doc xml:space="preserve">Check if @device matches all of the given classes</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @device matches.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="classes" transfer-ownership="none">
<doc xml:space="preserve">a "/"-separated list of device classes to match, only match if
all classes are matched</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="has_classesv" c:identifier="gst_device_has_classesv" version="1.4">
<doc xml:space="preserve">Check if @factory matches all of the given classes</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @device matches.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="classes" transfer-ownership="none">
<doc xml:space="preserve">a %NULL terminated array of classes
to match, only match if all classes are matched</doc>
<array c:type="gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</method>
<method name="reconfigure_element" c:identifier="gst_device_reconfigure_element" version="1.4">
<doc xml:space="preserve">Tries to reconfigure an existing element to use the device. If this
function fails, then one must destroy the element and create a new one
using gst_device_create_element().
Note: This should only be implemented for elements can change their
device in the PLAYING state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element could be reconfigured to use this device,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</instance-parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</method>
<property name="caps" writable="1" construct-only="1" transfer-ownership="none">
<type name="Caps"/>
</property>
<property name="device-class" writable="1" construct-only="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<property name="display-name" writable="1" construct-only="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<property name="properties" writable="1" construct-only="1" transfer-ownership="none">
<type name="Structure"/>
</property>
<field name="parent">
<doc xml:space="preserve">The parent #GstObject structure.</doc>
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="DevicePrivate" c:type="GstDevicePrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="removed" when="last">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</glib:signal>
</class>
<record name="DeviceClass" c:type="GstDeviceClass" glib:is-gtype-struct-for="Device" version="1.4">
<doc xml:space="preserve">The class structure for a #GstDevice object.</doc>
<field name="parent_class">
<doc xml:space="preserve">The parent #GstObjectClass structure.</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="create_element">
<callback name="create_element">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstElement configured to use
this device</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new element, or %NULL to automatically
create a unique name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="reconfigure_element">
<callback name="reconfigure_element">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element could be reconfigured to use this device,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<class name="DeviceMonitor" c:symbol-prefix="device_monitor" c:type="GstDeviceMonitor" version="1.4" parent="Object" glib:type-name="GstDeviceMonitor" glib:get-type="gst_device_monitor_get_type" glib:type-struct="DeviceMonitorClass">
<doc xml:space="preserve">Applications should create a #GstDeviceMonitor when they want
to probe, list and monitor devices of a specific type. The
#GstDeviceMonitor will create the appropriate
#GstDeviceProvider objects and manage them. It will then post
messages on its #GstBus for devices that have been added and
removed.
The device monitor will monitor all devices matching the filters that
the application has set.
The basic use pattern of a device monitor is as follows:
|[
static gboolean
my_bus_func (GstBus * bus, GstMessage * message, gpointer user_data)
{
GstDevice *device;
gchar *name;
switch (GST_MESSAGE_TYPE (message)) {
case GST_MESSAGE_DEVICE_ADDED:
gst_message_parse_device_added (message, &amp;device);
name = gst_device_get_display_name (device);
g_print("Device added: %s\n", name);
g_free (name);
gst_object_unref (device);
break;
case GST_MESSAGE_DEVICE_REMOVED:
gst_message_parse_device_removed (message, &amp;device);
name = gst_device_get_display_name (device);
g_print("Device removed: %s\n", name);
g_free (name);
gst_object_unref (device);
break;
default:
break;
}
return G_SOURCE_CONTINUE;
}
GstDeviceMonitor *
setup_raw_video_source_device_monitor (void) {
GstDeviceMonitor *monitor;
GstBus *bus;
GstCaps *caps;
monitor = gst_device_monitor_new ();
bus = gst_device_monitor_get_bus (monitor);
gst_bus_add_watch (bus, my_bus_func, NULL);
gst_object_unref (bus);
caps = gst_caps_new_empty_simple ("video/x-raw");
gst_device_monitor_add_filter (monitor, "Video/Source", caps);
gst_caps_unref (caps);
gst_device_monitor_start (monitor);
return monitor;
}
]|</doc>
<constructor name="new" c:identifier="gst_device_monitor_new" version="1.4">
<doc xml:space="preserve">Create a new #GstDeviceMonitor</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new device monitor.</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</return-value>
</constructor>
<method name="add_filter" c:identifier="gst_device_monitor_add_filter" version="1.4">
<doc xml:space="preserve">Adds a filter for which #GstDevice will be monitored, any device that matches
all these classes and the #GstCaps will be returned.
If this function is called multiple times to add more filters, each will be
matched independently. That is, adding more filters will not further restrict
what devices are matched.
The #GstCaps supported by the device as returned by gst_device_get_caps() are
not intersected with caps filters added using this function.
Filters must be added before the #GstDeviceMonitor is started.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The id of the new filter or 0 if no provider matched the filter's
classes.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a device monitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
<parameter name="classes" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">device classes to use as filter or %NULL for any class</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCaps to filter or %NULL for ANY</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="get_bus" c:identifier="gst_device_monitor_get_bus" version="1.4">
<doc xml:space="preserve">Gets the #GstBus of this #GstDeviceMonitor</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_devices" c:identifier="gst_device_monitor_get_devices" version="1.4">
<doc xml:space="preserve">Gets a list of devices from all of the relevant monitors. This may actually
probe the hardware if the monitor is not currently started.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GList of
#GstDevice</doc>
<type name="GLib.List" c:type="GList*">
<type name="Device"/>
</type>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_providers" c:identifier="gst_device_monitor_get_providers" version="1.6">
<doc xml:space="preserve">Get a list of the currently selected device provider factories.
This</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">
A list of device provider factory names that are currently being
monitored by @monitor or %NULL when nothing is being monitored.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceMonitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_show_all_devices" c:identifier="gst_device_monitor_get_show_all_devices" version="1.6">
<doc xml:space="preserve">Get if @monitor is currently showing all devices, even those from hidden
providers.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when all devices will be shown.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceMonitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_filter" c:identifier="gst_device_monitor_remove_filter" version="1.4">
<doc xml:space="preserve">Removes a filter from the #GstDeviceMonitor using the id that was returned
by gst_device_monitor_add_filter().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE of the filter id was valid, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a device monitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
<parameter name="filter_id" transfer-ownership="none">
<doc xml:space="preserve">the id of the filter</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_show_all_devices" c:identifier="gst_device_monitor_set_show_all_devices" version="1.6">
<doc xml:space="preserve">Set if all devices should be visible, even those devices from hidden
providers. Setting @show_all to true might show some devices multiple times.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceMonitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
<parameter name="show_all" transfer-ownership="none">
<doc xml:space="preserve">show all devices</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="start" c:identifier="gst_device_monitor_start" version="1.4">
<doc xml:space="preserve">Starts monitoring the devices, one this has succeeded, the
%GST_MESSAGE_DEVICE_ADDED and %GST_MESSAGE_DEVICE_REMOVED messages
will be emitted on the bus when the list of devices changes.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the device monitoring could be started</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceMonitor</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<method name="stop" c:identifier="gst_device_monitor_stop" version="1.4">
<doc xml:space="preserve">Stops monitoring the devices.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="monitor" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceMonitor" c:type="GstDeviceMonitor*"/>
</instance-parameter>
</parameters>
</method>
<property name="show-all" writable="1" transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</property>
<field name="parent">
<doc xml:space="preserve">the parent #GstObject structure</doc>
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="DeviceMonitorPrivate" c:type="GstDeviceMonitorPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="DeviceMonitorClass" c:type="GstDeviceMonitorClass" glib:is-gtype-struct-for="DeviceMonitor" version="1.4">
<doc xml:space="preserve">Opaque device monitor class structure.</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent #GstObjectClass structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="DeviceMonitorPrivate" c:type="GstDeviceMonitorPrivate" disguised="1"/>
<record name="DevicePrivate" c:type="GstDevicePrivate" disguised="1"/>
<class name="DeviceProvider" c:symbol-prefix="device_provider" c:type="GstDeviceProvider" version="1.4" parent="Object" abstract="1" glib:type-name="GstDeviceProvider" glib:get-type="gst_device_provider_get_type" glib:type-struct="DeviceProviderClass">
<doc xml:space="preserve">A #GstDeviceProvider subclass is provided by a plugin that handles devices
if there is a way to programmatically list connected devices. It can also
optionally provide updates to the list of connected devices.
Each #GstDeviceProvider subclass is a singleton, a plugin should
normally provide a single subclass for all devices.
Applications would normally use a #GstDeviceMonitor to monitor devices
from all relevant providers.</doc>
<function name="register" c:identifier="gst_device_provider_register" version="1.4">
<doc xml:space="preserve">Create a new device providerfactory capable of instantiating objects of the
@type and add the factory to @plugin.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the registering succeeded, %FALSE on error</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">#GstPlugin to register the device provider with, or %NULL for
a static device provider.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of device providers of this type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="rank" transfer-ownership="none">
<doc xml:space="preserve">rank of device provider (higher rank means more importance when autoplugging)</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">GType of device provider to register</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<virtual-method name="probe" introspectable="0">
<return-value>
<type name="GLib.List" c:type="GList*">
<type name="gpointer" c:type="gpointer"/>
</type>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="start" invoker="start" version="1.4">
<doc xml:space="preserve">Starts providering the devices. This will cause #GST_MESSAGE_DEVICE_ADDED
and #GST_MESSAGE_DEVICE_REMOVED messages to be posted on the provider's bus
when devices are added or removed from the system.
Since the #GstDeviceProvider is a singleton,
gst_device_provider_start() may already have been called by another
user of the object, gst_device_provider_stop() needs to be called the same
number of times.
After this function has been called, gst_device_provider_get_devices() will
return the same objects that have been received from the
#GST_MESSAGE_DEVICE_ADDED messages and will no longer probe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the device providering could be started</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="stop" invoker="stop" version="1.4">
<doc xml:space="preserve">Decreases the use-count by one. If the use count reaches zero, this
#GstDeviceProvider will stop providering the devices. This needs to be
called the same number of times that gst_device_provider_start() was called.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</virtual-method>
<method name="can_monitor" c:identifier="gst_device_provider_can_monitor">
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="device_add" c:identifier="gst_device_provider_device_add" version="1.4">
<doc xml:space="preserve">Posts a message on the provider's #GstBus to inform applications that
a new device has been added.
This is for use by subclasses.
@device's reference count will be incremented, and any floating reference
will be removed (see gst_object_ref_sink()).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice that has been added</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</method>
<method name="device_changed" c:identifier="gst_device_provider_device_changed" version="1.16">
<doc xml:space="preserve">This function is used when @changed_device was modified into its new form
@device. This will post a `DEVICE_CHANGED` message on the bus to let
the application know that the device was modified. #GstDevice is immutable
for MT. safety purposes so this is an "atomic" way of letting the application
know when a device was modified.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">the new version of @changed_device</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
<parameter name="changed_device" transfer-ownership="none">
<doc xml:space="preserve">the old version of the device that has been updated</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</method>
<method name="device_remove" c:identifier="gst_device_provider_device_remove" version="1.4">
<doc xml:space="preserve">Posts a message on the provider's #GstBus to inform applications that
a device has been removed.
This is for use by subclasses.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">a #GstDevice that has been removed</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</method>
<method name="get_bus" c:identifier="gst_device_provider_get_bus" version="1.4">
<doc xml:space="preserve">Gets the #GstBus of this #GstDeviceProvider</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstBus</doc>
<type name="Bus" c:type="GstBus*"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_devices" c:identifier="gst_device_provider_get_devices" version="1.4">
<doc xml:space="preserve">Gets a list of devices that this provider understands. This may actually
probe the hardware if the provider is not currently started.
If the provider has been started, this will returned the same #GstDevice
objedcts that have been returned by the #GST_MESSAGE_DEVICE_ADDED messages.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstDevice</doc>
<type name="GLib.List" c:type="GList*">
<type name="Device"/>
</type>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_factory" c:identifier="gst_device_provider_get_factory" version="1.4">
<doc xml:space="preserve">Retrieves the factory that was used to create this device provider.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstDeviceProviderFactory used for
creating this device provider. no refcounting is needed.</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider to request the device provider factory of.</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_hidden_providers" c:identifier="gst_device_provider_get_hidden_providers" version="1.6">
<doc xml:space="preserve">Get the provider factory names of the #GstDeviceProvider instances that
are hidden by @provider.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">
a list of hidden providers factory names or %NULL when
nothing is hidden by @provider. Free with g_strfreev.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_device_provider_get_metadata" version="1.14">
<doc xml:space="preserve">Get metadata with @key in @provider.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the metadata for @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">provider to get metadata for</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="hide_provider" c:identifier="gst_device_provider_hide_provider" version="1.6">
<doc xml:space="preserve">Make @provider hide the devices from the factory with @name.
This function is used when @provider will also provide the devices reported
by provider factory @name. A monitor should stop monitoring the
device provider with @name to avoid duplicate devices.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a provider factory name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="start" c:identifier="gst_device_provider_start" version="1.4">
<doc xml:space="preserve">Starts providering the devices. This will cause #GST_MESSAGE_DEVICE_ADDED
and #GST_MESSAGE_DEVICE_REMOVED messages to be posted on the provider's bus
when devices are added or removed from the system.
Since the #GstDeviceProvider is a singleton,
gst_device_provider_start() may already have been called by another
user of the object, gst_device_provider_stop() needs to be called the same
number of times.
After this function has been called, gst_device_provider_get_devices() will
return the same objects that have been received from the
#GST_MESSAGE_DEVICE_ADDED messages and will no longer probe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the device providering could be started</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="stop" c:identifier="gst_device_provider_stop" version="1.4">
<doc xml:space="preserve">Decreases the use-count by one. If the use count reaches zero, this
#GstDeviceProvider will stop providering the devices. This needs to be
called the same number of times that gst_device_provider_start() was called.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
</parameters>
</method>
<method name="unhide_provider" c:identifier="gst_device_provider_unhide_provider" version="1.6">
<doc xml:space="preserve">Make @provider unhide the devices from factory @name.
This function is used when @provider will no longer provide the devices
reported by provider factory @name. A monitor should start
monitoring the devices from provider factory @name in order to see
all devices again.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a provider factory name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<field name="parent">
<doc xml:space="preserve">The parent #GstObject</doc>
<type name="Object" c:type="GstObject"/>
</field>
<field name="devices">
<doc xml:space="preserve">a #GList of the #GstDevice objects</doc>
<type name="GLib.List" c:type="GList*">
<type name="gpointer" c:type="gpointer"/>
</type>
</field>
<field name="priv" readable="0" private="1">
<type name="DeviceProviderPrivate" c:type="GstDeviceProviderPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="provider-hidden" when="first">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="provider-unhidden" when="first">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="DeviceProviderClass" c:type="GstDeviceProviderClass" glib:is-gtype-struct-for="DeviceProvider" version="1.4">
<doc xml:space="preserve">The structure of the base #GstDeviceProviderClass</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent #GstObjectClass structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="factory">
<doc xml:space="preserve">a pointer to the #GstDeviceProviderFactory that creates this
provider</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</field>
<field name="probe" introspectable="0">
<callback name="probe" introspectable="0">
<return-value>
<type name="GLib.List" c:type="GList*">
<type name="gpointer" c:type="gpointer"/>
</type>
</return-value>
<parameters>
<parameter name="provider" transfer-ownership="none">
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="start">
<callback name="start">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the device providering could be started</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="stop">
<callback name="stop">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="provider" transfer-ownership="none">
<doc xml:space="preserve">A #GstDeviceProvider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="metadata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<method name="add_metadata" c:identifier="gst_device_provider_class_add_metadata" version="1.4">
<doc xml:space="preserve">Set @key with @value as metadata in @klass.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="DeviceProviderClass" c:type="GstDeviceProviderClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the value to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="add_static_metadata" c:identifier="gst_device_provider_class_add_static_metadata" version="1.4">
<doc xml:space="preserve">Set @key with @value as metadata in @klass.
Same as gst_device_provider_class_add_metadata(), but @value must be a static string
or an inlined string, as it will not be copied. (GStreamer plugins will
be made resident once loaded, so this function can be used even from
dynamically loaded plugins.)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="DeviceProviderClass" c:type="GstDeviceProviderClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="full">
<doc xml:space="preserve">the value to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_device_provider_class_get_metadata" version="1.4">
<doc xml:space="preserve">Get metadata with @key in @klass.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the metadata for @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to get metadata for</doc>
<type name="DeviceProviderClass" c:type="GstDeviceProviderClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_metadata" c:identifier="gst_device_provider_class_set_metadata" version="1.4">
<doc xml:space="preserve">Sets the detailed information for a #GstDeviceProviderClass.
&gt; This function is for use in _class_init functions only.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="DeviceProviderClass" c:type="GstDeviceProviderClass*"/>
</instance-parameter>
<parameter name="longname" transfer-ownership="none">
<doc xml:space="preserve">The long English name of the device provider. E.g. "File Sink"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="classification" transfer-ownership="none">
<doc xml:space="preserve">String describing the type of device provider, as an
unordered list separated with slashes ('/'). See draft-klass.txt of the
design docs
for more details and common types. E.g: "Sink/File"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">Sentence describing the purpose of the device provider.
E.g: "Write stream to a file"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="author" transfer-ownership="none">
<doc xml:space="preserve">Name and contact details of the author(s). Use \n to separate
multiple author metadata. E.g: "Joe Bloggs &amp;lt;joe.blogs at foo.com&amp;gt;"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_static_metadata" c:identifier="gst_device_provider_class_set_static_metadata" version="1.4">
<doc xml:space="preserve">Sets the detailed information for a #GstDeviceProviderClass.
&gt; This function is for use in _class_init functions only.
Same as gst_device_provider_class_set_metadata(), but @longname, @classification,
@description, and @author must be static strings or inlined strings, as
they will not be copied. (GStreamer plugins will be made resident once
loaded, so this function can be used even from dynamically loaded plugins.)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="DeviceProviderClass" c:type="GstDeviceProviderClass*"/>
</instance-parameter>
<parameter name="longname" transfer-ownership="full">
<doc xml:space="preserve">The long English name of the element. E.g. "File Sink"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="classification" transfer-ownership="full">
<doc xml:space="preserve">String describing the type of element, as
an unordered list separated with slashes ('/'). See draft-klass.txt of the
design docs for more details and common types. E.g: "Sink/File"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="full">
<doc xml:space="preserve">Sentence describing the purpose of the
element. E.g: "Write stream to a file"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="author" transfer-ownership="full">
<doc xml:space="preserve">Name and contact details of the author(s). Use \n
to separate multiple author metadata. E.g: "Joe Bloggs &amp;lt;joe.blogs at
foo.com&amp;gt;"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
</record>
<class name="DeviceProviderFactory" c:symbol-prefix="device_provider_factory" c:type="GstDeviceProviderFactory" version="1.4" parent="PluginFeature" glib:type-name="GstDeviceProviderFactory" glib:get-type="gst_device_provider_factory_get_type" glib:type-struct="DeviceProviderFactoryClass">
<doc xml:space="preserve">#GstDeviceProviderFactory is used to create instances of device providers. A
GstDeviceProviderfactory can be added to a #GstPlugin as it is also a
#GstPluginFeature.
Use the gst_device_provider_factory_find() and
gst_device_provider_factory_get() functions to create device
provider instances or use gst_device_provider_factory_get_by_name() as a
convenient shortcut.</doc>
<function name="find" c:identifier="gst_device_provider_factory_find" version="1.4">
<doc xml:space="preserve">Search for an device provider factory of the given name. Refs the returned
device provider factory; caller is responsible for unreffing.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">#GstDeviceProviderFactory if
found, %NULL otherwise</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of factory to find</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="get_by_name" c:identifier="gst_device_provider_factory_get_by_name" version="1.4">
<doc xml:space="preserve">Returns the device provider of the type defined by the given device
provider factory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstDeviceProvider or %NULL
if unable to create device provider</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</return-value>
<parameters>
<parameter name="factoryname" transfer-ownership="none">
<doc xml:space="preserve">a named factory to instantiate</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="list_get_device_providers" c:identifier="gst_device_provider_factory_list_get_device_providers" version="1.4">
<doc xml:space="preserve">Get a list of factories with a rank greater or equal to @minrank.
The list of factories is returned by decreasing rank.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">
a #GList of #GstDeviceProviderFactory device providers. Use
gst_plugin_feature_list_free() after usage.</doc>
<type name="GLib.List" c:type="GList*">
<type name="DeviceProviderFactory"/>
</type>
</return-value>
<parameters>
<parameter name="minrank" transfer-ownership="none">
<doc xml:space="preserve">Minimum rank</doc>
<type name="Rank" c:type="GstRank"/>
</parameter>
</parameters>
</function>
<method name="get" c:identifier="gst_device_provider_factory_get" version="1.4">
<doc xml:space="preserve">Returns the device provider of the type defined by the given device
providerfactory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstDeviceProvider or %NULL
if the device provider couldn't be created</doc>
<type name="DeviceProvider" c:type="GstDeviceProvider*"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to instantiate</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_device_provider_type" c:identifier="gst_device_provider_factory_get_device_provider_type" version="1.4">
<doc xml:space="preserve">Get the #GType for device providers managed by this factory. The type can
only be retrieved if the device provider factory is loaded, which can be
assured with gst_plugin_feature_load().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GType for device providers managed by this factory.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to get managed #GType from</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_device_provider_factory_get_metadata" version="1.4">
<doc xml:space="preserve">Get the metadata on @factory with @key.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the metadata with @key on @factory or %NULL
when there was no metadata with the given @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProviderFactory</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">a key</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_metadata_keys" c:identifier="gst_device_provider_factory_get_metadata_keys" version="1.4">
<doc xml:space="preserve">Get the available keys for the metadata on @factory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">
a %NULL-terminated array of key strings, or %NULL when there is no
metadata. Free with g_strfreev() when no longer needed.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProviderFactory</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_classes" c:identifier="gst_device_provider_factory_has_classes" version="1.4">
<doc xml:space="preserve">Check if @factory matches all of the given @classes</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @factory matches or if @classes is %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProviderFactory</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
<parameter name="classes" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a "/" separate list of classes to match, only match
if all classes are matched</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="has_classesv" c:identifier="gst_device_provider_factory_has_classesv" version="1.4">
<doc xml:space="preserve">Check if @factory matches all of the given classes</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @factory matches.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstDeviceProviderFactory</doc>
<type name="DeviceProviderFactory" c:type="GstDeviceProviderFactory*"/>
</instance-parameter>
<parameter name="classes" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a %NULL terminated array
of classes to match, only match if all classes are matched</doc>
<array c:type="gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</method>
</class>
<record name="DeviceProviderFactoryClass" c:type="GstDeviceProviderFactoryClass" disguised="1" glib:is-gtype-struct-for="DeviceProviderFactory" version="1.4">
<doc xml:space="preserve">The opaque #GstDeviceProviderFactoryClass data structure.</doc>
</record>
<record name="DeviceProviderPrivate" c:type="GstDeviceProviderPrivate" disguised="1"/>
<class name="DoubleRange" c:symbol-prefix="double_range" glib:type-name="GstDoubleRange" glib:get-type="gst_double_range_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #gdouble range</doc>
</class>
<class name="DynamicTypeFactory" c:symbol-prefix="dynamic_type_factory" c:type="GstDynamicTypeFactory" version="1.12" parent="PluginFeature" glib:type-name="GstDynamicTypeFactory" glib:get-type="gst_dynamic_type_factory_get_type" glib:type-struct="DynamicTypeFactoryClass">
<doc xml:space="preserve">#GstDynamicTypeFactory is used to represent a type that can be
automatically loaded the first time it is used. For example,
a non-standard type for use in caps fields.
In general, applications and plugins don't need to use the factory
beyond registering the type in a plugin init function. Once that is
done, the type is stored in the registry, and ready as soon as the
registry is loaded.
## Registering a type for dynamic loading
|[&lt;!-- language="C" --&gt;
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_dynamic_type_register (plugin, GST_TYPE_CUSTOM_CAPS_FIELD);
}
]|</doc>
<function name="load" c:identifier="gst_dynamic_type_factory_load">
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<parameter name="factoryname" transfer-ownership="none">
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
</class>
<record name="DynamicTypeFactoryClass" c:type="GstDynamicTypeFactoryClass" disguised="1" glib:is-gtype-struct-for="DynamicTypeFactory"/>
<function-macro name="ELEMENT" c:identifier="GST_ELEMENT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_BUS" c:identifier="GST_ELEMENT_BUS" introspectable="0">
<doc xml:space="preserve">Get the message bus of this element. This is not thread-safe by default
(i.e. you will have to make sure the object lock is taken yourself).
If in doubt use gst_element_get_bus() instead.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_CAST" c:identifier="GST_ELEMENT_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_CLASS" c:identifier="GST_ELEMENT_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_CLOCK" c:identifier="GST_ELEMENT_CLOCK" introspectable="0">
<doc xml:space="preserve">Get the clock of this element.This is not thread-safe by default
(i.e. you will have to make sure it is safe yourself).
If in doubt use gst_element_get_clock() instead.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_ERROR" c:identifier="GST_ELEMENT_ERROR" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they encountered a fatal
data processing error. The pipeline will post an error message and the
application will be requested to stop further media processing.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the error</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_ERROR_WITH_DETAILS" c:identifier="GST_ELEMENT_ERROR_WITH_DETAILS" version="1.10" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they encountered a fatal
data processing error. The pipeline will post an error message and the
application will be requested to stop further media processing.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the error</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
<parameter name="args">
<doc xml:space="preserve">optional name, type, value triplets, which will be stored
in the associated GstStructure. NULL terminator required.
Must be enclosed within parentheses.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_FACTORY" c:identifier="GST_ELEMENT_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_FACTORY_CAST" c:identifier="GST_ELEMENT_FACTORY_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_FACTORY_CLASS" c:identifier="GST_ELEMENT_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<constant name="ELEMENT_FACTORY_KLASS_DECODER" value="Decoder" c:type="GST_ELEMENT_FACTORY_KLASS_DECODER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_DECRYPTOR" value="Decryptor" c:type="GST_ELEMENT_FACTORY_KLASS_DECRYPTOR">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_DEMUXER" value="Demuxer" c:type="GST_ELEMENT_FACTORY_KLASS_DEMUXER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_DEPAYLOADER" value="Depayloader" c:type="GST_ELEMENT_FACTORY_KLASS_DEPAYLOADER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_ENCODER" value="Encoder" c:type="GST_ELEMENT_FACTORY_KLASS_ENCODER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_ENCRYPTOR" value="Encryptor" c:type="GST_ELEMENT_FACTORY_KLASS_ENCRYPTOR">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_FORMATTER" value="Formatter" c:type="GST_ELEMENT_FACTORY_KLASS_FORMATTER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_HARDWARE" value="Hardware" c:type="GST_ELEMENT_FACTORY_KLASS_HARDWARE" version="1.16">
<doc xml:space="preserve">Elements interacting with hardware devices should specify this classifier in
their metadata. You may need to put the element in "READY" state to test if
the hardware is present in the system.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MEDIA_AUDIO" value="Audio" c:type="GST_ELEMENT_FACTORY_KLASS_MEDIA_AUDIO">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MEDIA_IMAGE" value="Image" c:type="GST_ELEMENT_FACTORY_KLASS_MEDIA_IMAGE">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MEDIA_METADATA" value="Metadata" c:type="GST_ELEMENT_FACTORY_KLASS_MEDIA_METADATA">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE" value="Subtitle" c:type="GST_ELEMENT_FACTORY_KLASS_MEDIA_SUBTITLE">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MEDIA_VIDEO" value="Video" c:type="GST_ELEMENT_FACTORY_KLASS_MEDIA_VIDEO">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_MUXER" value="Muxer" c:type="GST_ELEMENT_FACTORY_KLASS_MUXER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_PARSER" value="Parser" c:type="GST_ELEMENT_FACTORY_KLASS_PARSER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_PAYLOADER" value="Payloader" c:type="GST_ELEMENT_FACTORY_KLASS_PAYLOADER">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_SINK" value="Sink" c:type="GST_ELEMENT_FACTORY_KLASS_SINK">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_KLASS_SRC" value="Source" c:type="GST_ELEMENT_FACTORY_KLASS_SRC">
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_ANY" value="562949953421311" c:type="GST_ELEMENT_FACTORY_TYPE_ANY">
<doc xml:space="preserve">Elements of any of the defined GST_ELEMENT_FACTORY_LIST types</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS" value="3940649673949188" c:type="GST_ELEMENT_FACTORY_TYPE_AUDIOVIDEO_SINKS">
<doc xml:space="preserve">All sinks handling audio, video or image media types</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_AUDIO_ENCODER" value="1125899906842626" c:type="GST_ELEMENT_FACTORY_TYPE_AUDIO_ENCODER">
<doc xml:space="preserve">All encoders handling audio media types</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_DECODABLE" value="1377" c:type="GST_ELEMENT_FACTORY_TYPE_DECODABLE">
<doc xml:space="preserve">All elements used to 'decode' streams (decoders, demuxers, parsers, depayloaders)</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_DECODER" value="1" c:type="GST_ELEMENT_FACTORY_TYPE_DECODER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_DECRYPTOR" value="1024" c:type="GST_ELEMENT_FACTORY_TYPE_DECRYPTOR">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_DEMUXER" value="32" c:type="GST_ELEMENT_FACTORY_TYPE_DEMUXER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_DEPAYLOADER" value="256" c:type="GST_ELEMENT_FACTORY_TYPE_DEPAYLOADER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_ENCODER" value="2" c:type="GST_ELEMENT_FACTORY_TYPE_ENCODER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_ENCRYPTOR" value="2048" c:type="GST_ELEMENT_FACTORY_TYPE_ENCRYPTOR">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_FORMATTER" value="512" c:type="GST_ELEMENT_FACTORY_TYPE_FORMATTER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_HARDWARE" value="4096" c:type="GST_ELEMENT_FACTORY_TYPE_HARDWARE">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MAX_ELEMENTS" value="281474976710656" c:type="GST_ELEMENT_FACTORY_TYPE_MAX_ELEMENTS">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_ANY" value="18446462598732840960" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_ANY">
<doc xml:space="preserve">Elements matching any of the defined GST_ELEMENT_FACTORY_TYPE_MEDIA types
Note: Do not use this if you wish to not filter against any of the defined
media types. If you wish to do this, simply don't specify any
GST_ELEMENT_FACTORY_TYPE_MEDIA flag.</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_AUDIO" value="1125899906842624" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_AUDIO">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_IMAGE" value="2251799813685248" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_IMAGE">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_METADATA" value="9007199254740992" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_METADATA">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE" value="4503599627370496" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_SUBTITLE">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MEDIA_VIDEO" value="562949953421312" c:type="GST_ELEMENT_FACTORY_TYPE_MEDIA_VIDEO">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_MUXER" value="16" c:type="GST_ELEMENT_FACTORY_TYPE_MUXER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_PARSER" value="64" c:type="GST_ELEMENT_FACTORY_TYPE_PARSER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_PAYLOADER" value="128" c:type="GST_ELEMENT_FACTORY_TYPE_PAYLOADER">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_SINK" value="4" c:type="GST_ELEMENT_FACTORY_TYPE_SINK">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_SRC" value="8" c:type="GST_ELEMENT_FACTORY_TYPE_SRC">
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<constant name="ELEMENT_FACTORY_TYPE_VIDEO_ENCODER" value="2814749767106562" c:type="GST_ELEMENT_FACTORY_TYPE_VIDEO_ENCODER">
<doc xml:space="preserve">All encoders handling video or image media types</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</constant>
<function-macro name="ELEMENT_FLOW_ERROR" c:identifier="GST_ELEMENT_FLOW_ERROR" version="1.10" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they encountered a fatal
data processing error due to wrong flow processing.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the error</doc>
</parameter>
<parameter name="flow_return">
<doc xml:space="preserve">the GstFlowReturn leading to that ERROR message</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_GET_CLASS" c:identifier="GST_ELEMENT_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_INFO" c:identifier="GST_ELEMENT_INFO" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they want to inform
the application of something noteworthy that is not an error.
The pipeline will post a info message and the
application will be informed.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the information</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_INFO_WITH_DETAILS" c:identifier="GST_ELEMENT_INFO_WITH_DETAILS" version="1.10" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they want to inform
the application of something noteworthy that is not an error.
The pipeline will post a info message and the
application will be informed.
Optional name, type, value triplets may be supplied, and will be stored
in the associated GstStructure. NULL terminator required.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the information</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
<parameter name="args">
<doc xml:space="preserve">optional name, type, value triplets, which will be stored
in the associated GstStructure. NULL terminator required.
Must be enclosed within parentheses.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_IS_LOCKED_STATE" c:identifier="GST_ELEMENT_IS_LOCKED_STATE" introspectable="0">
<doc xml:space="preserve">Check if the element is in the locked state and therefore will ignore state
changes from its parent object.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_MESSAGE_MAKE_DETAILS" c:identifier="GST_ELEMENT_MESSAGE_MAKE_DETAILS" introspectable="0">
<parameters>
<parameter name="args">
</parameter>
</parameters>
</function-macro>
<constant name="ELEMENT_METADATA_AUTHOR" value="author" c:type="GST_ELEMENT_METADATA_AUTHOR">
<doc xml:space="preserve">Name and contact details of the author(s). Use \n to separate
multiple author details.
E.g: "Joe Bloggs &amp;lt;joe.blogs at foo.com&amp;gt;"</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_METADATA_DESCRIPTION" value="description" c:type="GST_ELEMENT_METADATA_DESCRIPTION">
<doc xml:space="preserve">Sentence describing the purpose of the element.
E.g: "Write stream to a file"</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_METADATA_DOC_URI" value="doc-uri" c:type="GST_ELEMENT_METADATA_DOC_URI">
<doc xml:space="preserve">Set uri pointing to user documentation. Applications can use this to show
help for e.g. effects to users.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_METADATA_ICON_NAME" value="icon-name" c:type="GST_ELEMENT_METADATA_ICON_NAME">
<doc xml:space="preserve">Elements that bridge to certain other products can include an icon of that
used product. Application can show the icon in menus/selectors to help
identifying specific elements.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_METADATA_KLASS" value="klass" c:type="GST_ELEMENT_METADATA_KLASS">
<doc xml:space="preserve">String describing the type of element, as an unordered list
separated with slashes ('/'). See draft-klass.txt of the design docs
for more details and common types. E.g: "Sink/File"</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="ELEMENT_METADATA_LONGNAME" value="long-name" c:type="GST_ELEMENT_METADATA_LONGNAME">
<doc xml:space="preserve">The long English name of the element. E.g. "File Sink"</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="ELEMENT_NAME" c:identifier="GST_ELEMENT_NAME" introspectable="0">
<doc xml:space="preserve">Gets the name of this element. This is not thread-safe by default
(i.e. you will have to make sure the object lock is taken yourself).
If in doubt use gst_element_get_name() instead.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_PADS" c:identifier="GST_ELEMENT_PADS" introspectable="0">
<doc xml:space="preserve">Get the pads of this elements.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_PARENT" c:identifier="GST_ELEMENT_PARENT" introspectable="0">
<doc xml:space="preserve">Get the parent object of this element. This is not thread-safe by default
(i.e. you will have to make sure the object lock is taken yourself).
If in doubt use gst_object_get_parent() instead.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">A #GstElement to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_START_TIME" c:identifier="GST_ELEMENT_START_TIME" introspectable="0">
<doc xml:space="preserve">This macro returns the start_time of the @elem. The start_time is the
running_time of the pipeline when the element went to PAUSED.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return the start time for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_WARNING" c:identifier="GST_ELEMENT_WARNING" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they encountered a non-fatal
data processing problem. The pipeline will post a warning message and the
application will be informed.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the warning</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ELEMENT_WARNING_WITH_DETAILS" c:identifier="GST_ELEMENT_WARNING_WITH_DETAILS" version="1.10" introspectable="0">
<doc xml:space="preserve">Utility function that elements can use in case they encountered a non-fatal
data processing problem. The pipeline will post a warning message and the
application will be informed.</doc>
<parameters>
<parameter name="el">
<doc xml:space="preserve">the element that generates the warning</doc>
</parameter>
<parameter name="domain">
<doc xml:space="preserve">like CORE, LIBRARY, RESOURCE or STREAM (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="code">
<doc xml:space="preserve">error code defined for that domain (see [GstGError](gsterror))</doc>
</parameter>
<parameter name="text">
<doc xml:space="preserve">the message to display (format string and args enclosed in
parentheses)</doc>
</parameter>
<parameter name="debug">
<doc xml:space="preserve">debugging information for the message (format string and args
enclosed in parentheses)</doc>
</parameter>
<parameter name="args">
<doc xml:space="preserve">optional name, type, value triplets, which will be stored
in the associated GstStructure. NULL terminator required.
Must be enclosed within parentheses.</doc>
</parameter>
</parameters>
</function-macro>
<constant name="ERROR_SYSTEM" value="system error: %s" c:type="GST_ERROR_SYSTEM" introspectable="0">
<doc xml:space="preserve">Builds a string using errno describing the previously failed system
call. To be used as the debug argument in #GST_ELEMENT_ERROR.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="EVENT" c:identifier="GST_EVENT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_CAST" c:identifier="GST_EVENT_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_IS_DOWNSTREAM" c:identifier="GST_EVENT_IS_DOWNSTREAM" introspectable="0">
<doc xml:space="preserve">Check if an event can travel downstream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_IS_SERIALIZED" c:identifier="GST_EVENT_IS_SERIALIZED" introspectable="0">
<doc xml:space="preserve">Check if an event is serialized with the data stream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_IS_STICKY" c:identifier="GST_EVENT_IS_STICKY" introspectable="0">
<doc xml:space="preserve">Check if an event is sticky on the pads.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_IS_UPSTREAM" c:identifier="GST_EVENT_IS_UPSTREAM" introspectable="0">
<doc xml:space="preserve">Check if an event can travel upstream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_MAKE_TYPE" c:identifier="GST_EVENT_MAKE_TYPE" introspectable="0">
<doc xml:space="preserve">when making custom event types, use this macro with the num and
the given flags</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">the event number to create</doc>
</parameter>
<parameter name="flags">
<doc xml:space="preserve">the event flags</doc>
</parameter>
</parameters>
</function-macro>
<constant name="EVENT_NUM_SHIFT" value="8" c:type="GST_EVENT_NUM_SHIFT">
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="EVENT_SEQNUM" c:identifier="GST_EVENT_SEQNUM" introspectable="0">
<doc xml:space="preserve">The sequence number of @event.</doc>
<parameters>
<parameter name="event">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_TIMESTAMP" c:identifier="GST_EVENT_TIMESTAMP" introspectable="0">
<doc xml:space="preserve">Get the #GstClockTime timestamp of the event. This is the time when the event
was created.</doc>
<parameters>
<parameter name="event">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="EVENT_TYPE" c:identifier="GST_EVENT_TYPE" introspectable="0">
<doc xml:space="preserve">Get the #GstEventType of the event.</doc>
<parameters>
<parameter name="event">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<constant name="EVENT_TYPE_BOTH" value="3" c:type="GST_EVENT_TYPE_BOTH">
<doc xml:space="preserve">The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.</doc>
<type name="EventTypeFlags" c:type="GstEventTypeFlags"/>
</constant>
<function-macro name="EVENT_TYPE_NAME" c:identifier="GST_EVENT_TYPE_NAME" introspectable="0">
<doc xml:space="preserve">Get a constant string representation of the #GstEventType of the event.</doc>
<parameters>
<parameter name="event">
<doc xml:space="preserve">the event to query</doc>
</parameter>
</parameters>
</function-macro>
<class name="Element" c:symbol-prefix="element" c:type="GstElement" parent="Object" abstract="1" glib:type-name="GstElement" glib:get-type="gst_element_get_type" glib:type-struct="ElementClass">
<doc xml:space="preserve">GstElement is the abstract base class needed to construct an element that
can be used in a GStreamer pipeline. Please refer to the plugin writers
guide for more information on creating #GstElement subclasses.
The name of a #GstElement can be get with gst_element_get_name() and set with
gst_element_set_name(). For speed, GST_ELEMENT_NAME() can be used in the
core when using the appropriate locking. Do not use this in plug-ins or
applications in order to retain ABI compatibility.
Elements can have pads (of the type #GstPad). These pads link to pads on
other elements. #GstBuffer flow between these linked pads.
A #GstElement has a #GList of #GstPad structures for all their input (or sink)
and output (or source) pads.
Core and plug-in writers can add and remove pads with gst_element_add_pad()
and gst_element_remove_pad().
An existing pad of an element can be retrieved by name with
gst_element_get_static_pad(). A new dynamic pad can be created using
gst_element_request_pad() with a #GstPadTemplate.
An iterator of all pads can be retrieved with gst_element_iterate_pads().
Elements can be linked through their pads.
If the link is straightforward, use the gst_element_link()
convenience function to link two elements, or gst_element_link_many()
for more elements in a row.
Use gst_element_link_filtered() to link two elements constrained by
a specified set of #GstCaps.
For finer control, use gst_element_link_pads() and
gst_element_link_pads_filtered() to specify the pads to link on
each element by name.
Each element has a state (see #GstState). You can get and set the state
of an element with gst_element_get_state() and gst_element_set_state().
Setting a state triggers a #GstStateChange. To get a string representation
of a #GstState, use gst_element_state_get_name().
You can get and set a #GstClock on an element using gst_element_get_clock()
and gst_element_set_clock().
Some elements can provide a clock for the pipeline if
the #GST_ELEMENT_FLAG_PROVIDE_CLOCK flag is set. With the
gst_element_provide_clock() method one can retrieve the clock provided by
such an element.
Not all elements require a clock to operate correctly. If the
#GST_ELEMENT_FLAG_REQUIRE_CLOCK() flag is set, a clock should be set on the
element with gst_element_set_clock().
Note that clock selection and distribution is normally handled by the
toplevel #GstPipeline so the clock functions are only to be used in very
specific situations.</doc>
<function name="make_from_uri" c:identifier="gst_element_make_from_uri" throws="1">
<doc xml:space="preserve">Creates an element for handling the given URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new element or %NULL if none
could be created</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">Whether to create a source or a sink</doc>
<type name="URIType" c:type="const GstURIType"/>
</parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">URI to create an element for</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="elementname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Name of created element, can be %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="register" c:identifier="gst_element_register">
<doc xml:space="preserve">Create a new elementfactory capable of instantiating objects of the
@type and add the factory to @plugin.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the registering succeeded, %FALSE on error</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">#GstPlugin to register the element with, or %NULL for
a static element.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of elements of this type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="rank" transfer-ownership="none">
<doc xml:space="preserve">rank of element (higher rank means more importance when autoplugging)</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">GType of element to register</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<function name="state_change_return_get_name" c:identifier="gst_element_state_change_return_get_name">
<doc xml:space="preserve">Gets a string representing the given state change result.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a string with the name of the state
result.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="state_ret" transfer-ownership="none">
<doc xml:space="preserve">a #GstStateChangeReturn to get the name of.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</parameter>
</parameters>
</function>
<function name="state_get_name" c:identifier="gst_element_state_get_name">
<doc xml:space="preserve">Gets a string representing the given state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a string with the name of the state.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">a #GstState to get the name of.</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</function>
<virtual-method name="change_state" invoker="change_state">
<doc xml:space="preserve">Perform @transition on @element.
This function must be called with STATE_LOCK held and is mainly used
internally.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstStateChangeReturn of the state transition.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="transition" transfer-ownership="none">
<doc xml:space="preserve">the requested transition</doc>
<type name="StateChange" c:type="GstStateChange"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_state" invoker="get_state">
<doc xml:space="preserve">Gets the state of the element.
For elements that performed an ASYNC state change, as reported by
gst_element_set_state(), this function will block up to the
specified timeout value for the state change to complete.
If the element completes the state change or goes into
an error, this function returns immediately with a return value of
%GST_STATE_CHANGE_SUCCESS or %GST_STATE_CHANGE_FAILURE respectively.
For elements that did not return %GST_STATE_CHANGE_ASYNC, this function
returns the current and pending state immediately.
This function returns %GST_STATE_CHANGE_NO_PREROLL if the element
successfully changed its state but is not able to provide data yet.
This mostly happens for live sources that only produce data in
%GST_STATE_PLAYING. While the state change return is equivalent to
%GST_STATE_CHANGE_SUCCESS, it is returned to the application to signal that
some sink elements might not be able to complete their state change because
an element is not producing data to complete the preroll. When setting the
element to playing, the preroll will complete and playback will start.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%GST_STATE_CHANGE_SUCCESS if the element has no more pending state
and the last state change succeeded, %GST_STATE_CHANGE_ASYNC if the
element is still performing a state change or
%GST_STATE_CHANGE_FAILURE if the last state change failed.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the state of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="state" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the state.
Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="pending" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the pending
state. Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockTime to specify the timeout for an async
state change or %GST_CLOCK_TIME_NONE for infinite timeout.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="no_more_pads" invoker="no_more_pads">
<doc xml:space="preserve">Use this function to signal that the element does not expect any more pads
to show up in the current pipeline. This function should be called whenever
pads have been added by the element itself. Elements with #GST_PAD_SOMETIMES
pad templates use this in combination with autopluggers to figure out that
the element is done initializing its pads.
This function emits the #GstElement::no-more-pads signal.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="pad_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="pad_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="post_message" invoker="post_message">
<doc xml:space="preserve">Post a message on the element's #GstBus. This function takes ownership of the
message; if you want to access the message after this call, you should add an
additional reference before calling.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the message was successfully posted. The function returns
%FALSE if the element did not have a bus.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement posting the message</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="full">
<doc xml:space="preserve">a #GstMessage to post</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="provide_clock" invoker="provide_clock">
<doc xml:space="preserve">Get the clock provided by the given element.
&gt; An element is only required to provide a clock in the PAUSED
&gt; state. Some elements can provide a clock in other states.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GstClock provided by the
element or %NULL if no clock could be provided. Unref after usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to query</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="query" invoker="query">
<doc xml:space="preserve">Performs a query on the given element.
For elements that don't implement a query handler, this function
forwards the query to a random srcpad or to the peer of a
random linked sinkpad of this element.
Please note that some queries might need a running pipeline to work.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to perform the query on.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="release_pad">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="request_new_pad" invoker="request_pad">
<doc xml:space="preserve">Retrieves a request pad from the element according to the provided template.
Pad templates can be looked up using
gst_element_factory_get_static_pad_templates().
The pad should be released with gst_element_release_request_pad().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">requested #GstPad if found,
otherwise %NULL. Release after usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to find a request pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate of which we want a pad of.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the request #GstPad
to retrieve. Can be %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the caps of the pad we want to
request. Can be %NULL.</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="send_event" invoker="send_event">
<doc xml:space="preserve">Sends an event to an element. If the element doesn't implement an
event handler, the event will be pushed on a random linked sink pad for
downstream events or a random linked source pad for upstream events.
This function takes ownership of the provided event so you should
gst_event_ref() it if you want to reuse the event after this call.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled. Events that trigger a preroll (such
as flushing seeks and steps) will emit %GST_MESSAGE_ASYNC_DONE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send the event to.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to send to the element.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_bus" invoker="set_bus">
<doc xml:space="preserve">Sets the bus of the element. Increases the refcount on the bus.
For internal use only, unless you're testing elements.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the bus of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="bus" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstBus to set.</doc>
<type name="Bus" c:type="GstBus*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_clock" invoker="set_clock">
<doc xml:space="preserve">Sets the clock for the element. This function increases the
refcount on the clock. Any previously set clock on the object
is unreffed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element accepted the clock. An element can refuse a
clock when it, for example, is not able to slave its internal clock to the
@clock or when it requires a specific clock to operate.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the clock for.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstClock to set for the element.</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_context" invoker="set_context">
<doc xml:space="preserve">Sets the context of the element. Increases the refcount of the context.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">the #GstContext to set.</doc>
<type name="Context" c:type="GstContext*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_state" invoker="set_state">
<doc xml:space="preserve">Sets the state of the element. This function will try to set the
requested state by going through all the intermediary states and calling
the class's state change function for each.
This function can return #GST_STATE_CHANGE_ASYNC, in which case the
element will perform the remainder of the state change asynchronously in
another thread.
An application can use gst_element_get_state() to wait for the completion
of the state change or it can wait for a %GST_MESSAGE_ASYNC_DONE or
%GST_MESSAGE_STATE_CHANGED on the bus.
State changes to %GST_STATE_READY or %GST_STATE_NULL never return
#GST_STATE_CHANGE_ASYNC.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Result of the state change using #GstStateChangeReturn.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to change state of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">the element's new #GstState.</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="state_changed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="oldstate" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="newstate" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="pending" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</virtual-method>
<method name="abort_state" c:identifier="gst_element_abort_state">
<doc xml:space="preserve">Abort the state change of the element. This function is used
by elements that do asynchronous state changes and find out
something is wrong.
This function should be called with the STATE_LOCK held.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to abort the state of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="add_pad" c:identifier="gst_element_add_pad">
<doc xml:space="preserve">Adds a pad (link point) to @element. @pad's parent will be set to @element;
see gst_object_set_parent() for refcounting information.
Pads are automatically activated when added in the PAUSED or PLAYING
state.
The pad and the element should be unlocked when calling this function.
This function will emit the #GstElement::pad-added signal on the element.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad could be added. This function can fail when
a pad with the same name already existed or the pad already had another
parent.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to add the pad to.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to add to the element.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="add_property_deep_notify_watch" c:identifier="gst_element_add_property_deep_notify_watch" version="1.10">
<return-value transfer-ownership="none">
<doc xml:space="preserve">a watch id, which can be used in connection with
gst_element_remove_property_notify_watch() to remove the watch again.</doc>
<type name="gulong" c:type="gulong"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to watch (recursively) for property changes</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of property to watch for changes, or
NULL to watch all properties</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="include_value" transfer-ownership="none">
<doc xml:space="preserve">whether to include the new property value in the message</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="add_property_notify_watch" c:identifier="gst_element_add_property_notify_watch" version="1.10">
<return-value transfer-ownership="none">
<doc xml:space="preserve">a watch id, which can be used in connection with
gst_element_remove_property_notify_watch() to remove the watch again.</doc>
<type name="gulong" c:type="gulong"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to watch for property changes</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of property to watch for changes, or
NULL to watch all properties</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="include_value" transfer-ownership="none">
<doc xml:space="preserve">whether to include the new property value in the message</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="call_async" c:identifier="gst_element_call_async" version="1.10">
<doc xml:space="preserve">Calls @func from another thread and passes @user_data to it. This is to be
used for cases when a state change has to be performed from a streaming
thread, directly via gst_element_set_state() or indirectly e.g. via SEEK
events.
Calling those functions directly from the streaming thread will cause
deadlocks in many situations, as they might involve waiting for the
streaming thread to shut down from this very streaming thread.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">Function to call asynchronously from another thread</doc>
<type name="ElementCallAsyncFunc" c:type="GstElementCallAsyncFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Data to pass to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="destroy_notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">GDestroyNotify for @user_data</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="change_state" c:identifier="gst_element_change_state">
<doc xml:space="preserve">Perform @transition on @element.
This function must be called with STATE_LOCK held and is mainly used
internally.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstStateChangeReturn of the state transition.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="transition" transfer-ownership="none">
<doc xml:space="preserve">the requested transition</doc>
<type name="StateChange" c:type="GstStateChange"/>
</parameter>
</parameters>
</method>
<method name="continue_state" c:identifier="gst_element_continue_state">
<doc xml:space="preserve">Commit the state change of the element and proceed to the next
pending state if any. This function is used
by elements that do asynchronous state changes.
The core will normally call this method automatically when an
element returned %GST_STATE_CHANGE_SUCCESS from the state change function.
If after calling this method the element still has not reached
the pending state, the next state change is performed.
This method is used internally and should normally not be called by plugins
or applications.
This function must be called with STATE_LOCK held.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The result of the commit state change.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to continue the state change of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">The previous state return value</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</parameter>
</parameters>
</method>
<method name="create_all_pads" c:identifier="gst_element_create_all_pads">
<doc xml:space="preserve">Creates a pad for each pad template that is always available.
This function is only useful during object initialization of
subclasses of #GstElement.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to create pads for</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="foreach_pad" c:identifier="gst_element_foreach_pad" version="1.14">
<doc xml:space="preserve">Call @func with @user_data for each of @element's pads. @func will be called
exactly once for each pad that exists at the time of this call, unless
one of the calls to @func returns %FALSE in which case we will stop
iterating pads and return early. If new pads are added or pads are removed
while pads are being iterated, this will not be taken into account until
next time this function is used.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if @element had no pads or if one of the calls to @func
returned %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to iterate pads of</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">function to call for each pad</doc>
<type name="ElementForeachPadFunc" c:type="GstElementForeachPadFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="foreach_sink_pad" c:identifier="gst_element_foreach_sink_pad" version="1.14">
<doc xml:space="preserve">Call @func with @user_data for each of @element's sink pads. @func will be
called exactly once for each sink pad that exists at the time of this call,
unless one of the calls to @func returns %FALSE in which case we will stop
iterating pads and return early. If new sink pads are added or sink pads
are removed while the sink pads are being iterated, this will not be taken
into account until next time this function is used.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if @element had no sink pads or if one of the calls to @func
returned %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to iterate sink pads of</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">function to call for each sink pad</doc>
<type name="ElementForeachPadFunc" c:type="GstElementForeachPadFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="foreach_src_pad" c:identifier="gst_element_foreach_src_pad" version="1.14">
<doc xml:space="preserve">Call @func with @user_data for each of @element's source pads. @func will be
called exactly once for each source pad that exists at the time of this call,
unless one of the calls to @func returns %FALSE in which case we will stop
iterating pads and return early. If new source pads are added or source pads
are removed while the source pads are being iterated, this will not be taken
into account until next time this function is used.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if @element had no source pads or if one of the calls
to @func returned %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to iterate source pads of</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">function to call for each source pad</doc>
<type name="ElementForeachPadFunc" c:type="GstElementForeachPadFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get_base_time" c:identifier="gst_element_get_base_time">
<doc xml:space="preserve">Returns the base time of the element. The base time is the
absolute time of the clock when this element was last put to
PLAYING. Subtracting the base time from the clock time gives
the running time of the element.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the base time of the element.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_bus" c:identifier="gst_element_get_bus">
<doc xml:space="preserve">Returns the bus of the element. Note that only a #GstPipeline will provide a
bus for the application.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the element's #GstBus. unref after
usage.
MT safe.</doc>
<type name="Bus" c:type="GstBus*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the bus of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_clock" c:identifier="gst_element_get_clock">
<doc xml:space="preserve">Gets the currently configured clock of the element. This is the clock as was
last set with gst_element_set_clock().
Elements in a pipeline will only have their clock set when the
pipeline is in the PLAYING state.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstClock of the element. unref after usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the clock of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_compatible_pad" c:identifier="gst_element_get_compatible_pad">
<doc xml:space="preserve">Looks for an unlinked pad to which the given pad can link. It is not
guaranteed that linking the pads will work, though it should work in most
cases.
This function will first attempt to find a compatible unlinked ALWAYS pad,
and if none can be found, it will request a compatible REQUEST pad by looking
at the templates of @element.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstPad to which a link
can be made, or %NULL if one cannot be found. gst_object_unref()
after usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement in which the pad should be found.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to find a compatible one for.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCaps to use as a filter.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="get_compatible_pad_template" c:identifier="gst_element_get_compatible_pad_template">
<doc xml:space="preserve">Retrieves a pad template from @element that is compatible with @compattempl.
Pads from compatible templates can be linked together.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a compatible #GstPadTemplate,
or %NULL if none was found. No unreferencing is necessary.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get a compatible pad template for</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="compattempl" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadTemplate to find a compatible
template for</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
</parameters>
</method>
<method name="get_context" c:identifier="gst_element_get_context" version="1.8">
<doc xml:space="preserve">Gets the context with @context_type set on the element or NULL.
MT safe.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A #GstContext or NULL</doc>
<type name="Context" c:type="GstContext*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">a name of a context to retrieve</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_context_unlocked" c:identifier="gst_element_get_context_unlocked" version="1.8">
<doc xml:space="preserve">Gets the context with @context_type set on the element or NULL.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A #GstContext or NULL</doc>
<type name="Context" c:type="GstContext*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">a name of a context to retrieve</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_contexts" c:identifier="gst_element_get_contexts" version="1.8">
<doc xml:space="preserve">Gets the contexts set on the element.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">List of #GstContext</doc>
<type name="GLib.List" c:type="GList*">
<type name="Context"/>
</type>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_current_clock_time" c:identifier="gst_element_get_current_clock_time" version="1.18">
<doc xml:space="preserve">Returns the current clock time of the element, as in, the time of the
element's clock, or GST_CLOCK_TIME_NONE if there is no clock.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the clock time of the element, or GST_CLOCK_TIME_NONE if there is
no clock.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_current_running_time" c:identifier="gst_element_get_current_running_time" version="1.18">
<doc xml:space="preserve">Returns the running time of the element. The running time is the
element's clock time minus its base time. Will return GST_CLOCK_TIME_NONE
if the element has no clock, or if its base time has not been set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the running time of the element, or GST_CLOCK_TIME_NONE if the
element has no clock or its base time has not been set.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_factory" c:identifier="gst_element_get_factory">
<doc xml:space="preserve">Retrieves the factory that was used to create this element.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstElementFactory used for creating this
element or %NULL if element has not been registered (static element). no refcounting is needed.</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to request the element factory of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_element_get_metadata" version="1.14">
<doc xml:space="preserve">Get metadata with @key in @klass.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the metadata for @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">class to get metadata for</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_pad_template" c:identifier="gst_element_get_pad_template" version="1.14">
<doc xml:space="preserve">Retrieves a padtemplate from @element with the given name.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstPadTemplate with the
given name, or %NULL if none was found. No unreferencing is
necessary.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the pad template of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstPadTemplate to get.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_pad_template_list" c:identifier="gst_element_get_pad_template_list" version="1.14">
<doc xml:space="preserve">Retrieves a list of the pad templates associated with @element. The
list must not be modified by the calling code.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GList of
pad templates.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PadTemplate"/>
</type>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get pad templates of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_request_pad" c:identifier="gst_element_get_request_pad">
<doc xml:space="preserve">Retrieves a pad from the element by name (e.g. "src_\%d"). This version only
retrieves request pads. The pad should be released with
gst_element_release_request_pad().
This method is slower than manually getting the pad template and calling
gst_element_request_pad() if the pads should have a specific name (e.g.
@name is "src_1" instead of "src_\%u").</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">requested #GstPad if found,
otherwise %NULL. Release after usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to find a request pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the request #GstPad to retrieve.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_start_time" c:identifier="gst_element_get_start_time">
<doc xml:space="preserve">Returns the start time of the element. The start time is the
running time of the clock when this element was last put to PAUSED.
Usually the start_time is managed by a toplevel element such as
#GstPipeline.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the start time of the element.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_state" c:identifier="gst_element_get_state">
<doc xml:space="preserve">Gets the state of the element.
For elements that performed an ASYNC state change, as reported by
gst_element_set_state(), this function will block up to the
specified timeout value for the state change to complete.
If the element completes the state change or goes into
an error, this function returns immediately with a return value of
%GST_STATE_CHANGE_SUCCESS or %GST_STATE_CHANGE_FAILURE respectively.
For elements that did not return %GST_STATE_CHANGE_ASYNC, this function
returns the current and pending state immediately.
This function returns %GST_STATE_CHANGE_NO_PREROLL if the element
successfully changed its state but is not able to provide data yet.
This mostly happens for live sources that only produce data in
%GST_STATE_PLAYING. While the state change return is equivalent to
%GST_STATE_CHANGE_SUCCESS, it is returned to the application to signal that
some sink elements might not be able to complete their state change because
an element is not producing data to complete the preroll. When setting the
element to playing, the preroll will complete and playback will start.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%GST_STATE_CHANGE_SUCCESS if the element has no more pending state
and the last state change succeeded, %GST_STATE_CHANGE_ASYNC if the
element is still performing a state change or
%GST_STATE_CHANGE_FAILURE if the last state change failed.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the state of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="state" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the state.
Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="pending" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the pending
state. Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockTime to specify the timeout for an async
state change or %GST_CLOCK_TIME_NONE for infinite timeout.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="get_static_pad" c:identifier="gst_element_get_static_pad">
<doc xml:space="preserve">Retrieves a pad from @element by name. This version only retrieves
already-existing (i.e. 'static') pads.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the requested #GstPad if
found, otherwise %NULL. unref after usage.
MT safe.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to find a static pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the static #GstPad to retrieve.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="is_locked_state" c:identifier="gst_element_is_locked_state">
<doc xml:space="preserve">Checks if the state of an element is locked.
If the state of an element is locked, state changes of the parent don't
affect the element.
This way you can leave currently unused elements inside bins. Just lock their
state before changing the state from #GST_STATE_NULL.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the element's state is locked.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_pads" c:identifier="gst_element_iterate_pads">
<doc xml:space="preserve">Retrieves an iterator of @element's pads. The iterator should
be freed after usage. Also more specialized iterators exists such as
gst_element_iterate_src_pads() or gst_element_iterate_sink_pads().
The order of pads returned by the iterator will be the order in which
the pads were added to the element.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstIterator of #GstPad.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to iterate pads of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_sink_pads" c:identifier="gst_element_iterate_sink_pads">
<doc xml:space="preserve">Retrieves an iterator of @element's sink pads.
The order of pads returned by the iterator will be the order in which
the pads were added to the element.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstIterator of #GstPad.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_src_pads" c:identifier="gst_element_iterate_src_pads">
<doc xml:space="preserve">Retrieves an iterator of @element's source pads.
The order of pads returned by the iterator will be the order in which
the pads were added to the element.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstIterator of #GstPad.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="link" c:identifier="gst_element_link">
<doc xml:space="preserve">Links @src to @dest. The link must be from source to
destination; the other direction will not be tried. The function looks for
existing pads that aren't linked yet. It will request new pads if necessary.
Such pads need to be released manually when unlinking.
If multiple links are possible, only one is established.
Make sure you have added your elements to a bin or pipeline with
gst_bin_add() before trying to link them.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the elements could be linked, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</method>
<method name="link_filtered" c:identifier="gst_element_link_filtered">
<doc xml:space="preserve">Links @src to @dest using the given caps as filtercaps.
The link must be from source to
destination; the other direction will not be tried. The function looks for
existing pads that aren't linked yet. It will request new pads if necessary.
If multiple links are possible, only one is established.
Make sure you have added your elements to a bin or pipeline with
gst_bin_add() before trying to link them.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads could be linked, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="filter" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCaps to filter the link,
or %NULL for no filter.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="link_many" c:identifier="gst_element_link_many" introspectable="0">
<doc xml:space="preserve">Chain together a series of elements. Uses gst_element_link().
Make sure you have added your elements to a bin or pipeline with
gst_bin_add() before trying to link them.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element_1" transfer-ownership="none">
<doc xml:space="preserve">the first #GstElement in the link chain.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="element_2" transfer-ownership="none">
<doc xml:space="preserve">the second #GstElement in the link chain.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the %NULL-terminated list of elements to link in order.</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="link_pads" c:identifier="gst_element_link_pads">
<doc xml:space="preserve">Links the two named pads of the source and destination elements.
Side effect is that if one of the pads has no parent, it becomes a
child of the parent of the other element. If they have different
parents, the link fails.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads could be linked, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="srcpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in source element
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="destpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in destination element,
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="link_pads_filtered" c:identifier="gst_element_link_pads_filtered">
<doc xml:space="preserve">Links the two named pads of the source and destination elements. Side effect
is that if one of the pads has no parent, it becomes a child of the parent of
the other element. If they have different parents, the link fails. If @caps
is not %NULL, makes sure that the caps of the link is a subset of @caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads could be linked, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="srcpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in source element
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="destpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in destination element
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="filter" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCaps to filter the link,
or %NULL for no filter.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="link_pads_full" c:identifier="gst_element_link_pads_full">
<doc xml:space="preserve">Links the two named pads of the source and destination elements.
Side effect is that if one of the pads has no parent, it becomes a
child of the parent of the other element. If they have different
parents, the link fails.
Calling gst_element_link_pads_full() with @flags == %GST_PAD_LINK_CHECK_DEFAULT
is the same as calling gst_element_link_pads() and the recommended way of
linking pads with safety checks applied.
This is a convenience function for gst_pad_link_full().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads could be linked, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="srcpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in source element
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="destpadname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the #GstPad in destination element,
or %NULL for any pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadLinkCheck to be performed when linking pads.</doc>
<type name="PadLinkCheck" c:type="GstPadLinkCheck"/>
</parameter>
</parameters>
</method>
<method name="lost_state" c:identifier="gst_element_lost_state">
<doc xml:space="preserve">Brings the element to the lost state. The current state of the
element is copied to the pending state so that any call to
gst_element_get_state() will return %GST_STATE_CHANGE_ASYNC.
An ASYNC_START message is posted. If the element was PLAYING, it will
go to PAUSED. The element will be restored to its PLAYING state by
the parent pipeline when it prerolls again.
This is mostly used for elements that lost their preroll buffer
in the %GST_STATE_PAUSED or %GST_STATE_PLAYING state after a flush,
they will go to their pending state again when a new preroll buffer is
queued. This function can only be called when the element is currently
not in error or an async state change.
This function is used internally and should normally not be called from
plugins or applications.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement the state is lost of</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="message_full" c:identifier="gst_element_message_full">
<doc xml:space="preserve">Post an error, warning or info message on the bus from inside an element.
@type must be of #GST_MESSAGE_ERROR, #GST_MESSAGE_WARNING or
#GST_MESSAGE_INFO.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send message from</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessageType</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
<parameter name="domain" transfer-ownership="none">
<doc xml:space="preserve">the GStreamer GError domain this message belongs to</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="code" transfer-ownership="none">
<doc xml:space="preserve">the GError code belonging to the domain</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="text" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">an allocated text string to be used
as a replacement for the default message connected to code,
or %NULL</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
<parameter name="debug" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">an allocated debug message to be
used as a replacement for the default debugging information,
or %NULL</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the source code file where the error was generated</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the source code function where the error was generated</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the source code line where the error was generated</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="message_full_with_details" c:identifier="gst_element_message_full_with_details" version="1.10">
<doc xml:space="preserve">Post an error, warning or info message on the bus from inside an element.
@type must be of #GST_MESSAGE_ERROR, #GST_MESSAGE_WARNING or
#GST_MESSAGE_INFO.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send message from</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessageType</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
<parameter name="domain" transfer-ownership="none">
<doc xml:space="preserve">the GStreamer GError domain this message belongs to</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="code" transfer-ownership="none">
<doc xml:space="preserve">the GError code belonging to the domain</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="text" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">an allocated text string to be used
as a replacement for the default message connected to code,
or %NULL</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
<parameter name="debug" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">an allocated debug message to be
used as a replacement for the default debugging information,
or %NULL</doc>
<type name="utf8" c:type="gchar*"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the source code file where the error was generated</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the source code function where the error was generated</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the source code line where the error was generated</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">optional details structure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="no_more_pads" c:identifier="gst_element_no_more_pads">
<doc xml:space="preserve">Use this function to signal that the element does not expect any more pads
to show up in the current pipeline. This function should be called whenever
pads have been added by the element itself. Elements with #GST_PAD_SOMETIMES
pad templates use this in combination with autopluggers to figure out that
the element is done initializing its pads.
This function emits the #GstElement::no-more-pads signal.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="post_message" c:identifier="gst_element_post_message">
<doc xml:space="preserve">Post a message on the element's #GstBus. This function takes ownership of the
message; if you want to access the message after this call, you should add an
additional reference before calling.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the message was successfully posted. The function returns
%FALSE if the element did not have a bus.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement posting the message</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="message" transfer-ownership="full">
<doc xml:space="preserve">a #GstMessage to post</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</method>
<method name="provide_clock" c:identifier="gst_element_provide_clock">
<doc xml:space="preserve">Get the clock provided by the given element.
&gt; An element is only required to provide a clock in the PAUSED
&gt; state. Some elements can provide a clock in other states.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GstClock provided by the
element or %NULL if no clock could be provided. Unref after usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to query</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="query" c:identifier="gst_element_query">
<doc xml:space="preserve">Performs a query on the given element.
For elements that don't implement a query handler, this function
forwards the query to a random srcpad or to the peer of a
random linked sinkpad of this element.
Please note that some queries might need a running pipeline to work.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to perform the query on.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="query_convert" c:identifier="gst_element_query_convert">
<doc xml:space="preserve">Queries an element to convert @src_val in @src_format to @dest_format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to invoke the convert query on.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="src_format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat to convert from.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="src_val" transfer-ownership="none">
<doc xml:space="preserve">a value to convert.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="dest_format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat to convert to.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="dest_val" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to the result.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="query_duration" c:identifier="gst_element_query_duration">
<doc xml:space="preserve">Queries an element (usually top-level pipeline or playbin element) for the
total stream duration in nanoseconds. This query will only work once the
pipeline is prerolled (i.e. reached PAUSED or PLAYING state). The application
will receive an ASYNC_DONE message on the pipeline bus when that is the case.
If the duration changes for some reason, you will get a DURATION_CHANGED
message on the pipeline bus, in which case you should re-query the duration
using this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to invoke the duration query on.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location in which to store the total duration, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="query_position" c:identifier="gst_element_query_position">
<doc xml:space="preserve">Queries an element (usually top-level pipeline or playbin element) for the
stream position in nanoseconds. This will be a value between 0 and the
stream duration (if the stream duration is known). This query will usually
only work once the pipeline is prerolled (i.e. reached PAUSED or PLAYING
state). The application will receive an ASYNC_DONE message on the pipeline
bus when that is the case.
If one repeatedly calls this function one can also create a query and reuse
it in gst_element_query().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to invoke the position query on.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="cur" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location in which to store the current
position, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="release_request_pad" c:identifier="gst_element_release_request_pad">
<doc xml:space="preserve">Makes the element free the previously requested pad as obtained
with gst_element_request_pad().
This does not unref the pad. If the pad was created by using
gst_element_request_pad(), gst_element_release_request_pad() needs to be
followed by gst_object_unref() to free the @pad.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to release the request pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to release.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="remove_pad" c:identifier="gst_element_remove_pad">
<doc xml:space="preserve">Removes @pad from @element. @pad will be destroyed if it has not been
referenced elsewhere using gst_object_unparent().
This function is used by plugin developers and should not be used
by applications. Pads that were dynamically requested from elements
with gst_element_request_pad() should be released with the
gst_element_release_request_pad() function instead.
Pads are not automatically deactivated so elements should perform the needed
steps to deactivate the pad in case this pad is removed in the PAUSED or
PLAYING state. See gst_pad_set_active() for more information about
deactivating pads.
The pad and the element should be unlocked when calling this function.
This function will emit the #GstElement::pad-removed signal on the element.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad could be removed. Can return %FALSE if the
pad does not belong to the provided element.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to remove pad from.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to remove from the element.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="remove_property_notify_watch" c:identifier="gst_element_remove_property_notify_watch" version="1.10">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement being watched for property changes</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="watch_id" transfer-ownership="none">
<doc xml:space="preserve">watch id to remove</doc>
<type name="gulong" c:type="gulong"/>
</parameter>
</parameters>
</method>
<method name="request_pad" c:identifier="gst_element_request_pad">
<doc xml:space="preserve">Retrieves a request pad from the element according to the provided template.
Pad templates can be looked up using
gst_element_factory_get_static_pad_templates().
The pad should be released with gst_element_release_request_pad().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">requested #GstPad if found,
otherwise %NULL. Release after usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to find a request pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate of which we want a pad of.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the request #GstPad
to retrieve. Can be %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the caps of the pad we want to
request. Can be %NULL.</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="seek" c:identifier="gst_element_seek">
<doc xml:space="preserve">Sends a seek event to an element. See gst_event_new_seek() for the details of
the parameters. The seek event is sent to the element using
gst_element_send_event().
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled. Flushing seeks will trigger a
preroll, which will emit %GST_MESSAGE_ASYNC_DONE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send the event to.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">The new playback rate</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format of the seek values</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">The optional seek flags.</doc>
<type name="SeekFlags" c:type="GstSeekFlags"/>
</parameter>
<parameter name="start_type" transfer-ownership="none">
<doc xml:space="preserve">The type and flags for the new start position</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">The value of the new start position</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop_type" transfer-ownership="none">
<doc xml:space="preserve">The type and flags for the new stop position</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">The value of the new stop position</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="seek_simple" c:identifier="gst_element_seek_simple">
<doc xml:space="preserve">Simple API to perform a seek on the given element, meaning it just seeks
to the given position relative to the start of the stream. For more complex
operations like segment seeks (e.g. for looping) or changing the playback
rate or seeking relative to the last configured playback segment you should
use gst_element_seek().
In a completely prerolled PAUSED or PLAYING pipeline, seeking is always
guaranteed to return %TRUE on a seekable media type or %FALSE when the media
type is certainly not seekable (such as a live stream).
Some elements allow for seeking in the READY state, in this
case they will store the seek event and execute it when they are put to
PAUSED. If the element supports seek in READY, it will always return %TRUE when
it receives the event in the READY state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the seek operation succeeded. Flushing seeks will trigger a
preroll, which will emit %GST_MESSAGE_ASYNC_DONE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to seek on</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat to execute the seek in, such as #GST_FORMAT_TIME</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="seek_flags" transfer-ownership="none">
<doc xml:space="preserve">seek options; playback applications will usually want to use
GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_KEY_UNIT here</doc>
<type name="SeekFlags" c:type="GstSeekFlags"/>
</parameter>
<parameter name="seek_pos" transfer-ownership="none">
<doc xml:space="preserve">position to seek to (relative to the start); if you are doing
a seek in #GST_FORMAT_TIME this value is in nanoseconds -
multiply with #GST_SECOND to convert seconds to nanoseconds or
with #GST_MSECOND to convert milliseconds to nanoseconds.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="send_event" c:identifier="gst_element_send_event">
<doc xml:space="preserve">Sends an event to an element. If the element doesn't implement an
event handler, the event will be pushed on a random linked sink pad for
downstream events or a random linked source pad for upstream events.
This function takes ownership of the provided event so you should
gst_event_ref() it if you want to reuse the event after this call.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled. Events that trigger a preroll (such
as flushing seeks and steps) will emit %GST_MESSAGE_ASYNC_DONE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send the event to.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to send to the element.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</method>
<method name="set_base_time" c:identifier="gst_element_set_base_time">
<doc xml:space="preserve">Set the base time of an element. See gst_element_get_base_time().
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="time" transfer-ownership="none">
<doc xml:space="preserve">the base time to set.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_bus" c:identifier="gst_element_set_bus">
<doc xml:space="preserve">Sets the bus of the element. Increases the refcount on the bus.
For internal use only, unless you're testing elements.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the bus of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="bus" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstBus to set.</doc>
<type name="Bus" c:type="GstBus*"/>
</parameter>
</parameters>
</method>
<method name="set_clock" c:identifier="gst_element_set_clock">
<doc xml:space="preserve">Sets the clock for the element. This function increases the
refcount on the clock. Any previously set clock on the object
is unreffed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element accepted the clock. An element can refuse a
clock when it, for example, is not able to slave its internal clock to the
@clock or when it requires a specific clock to operate.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the clock for.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstClock to set for the element.</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</method>
<method name="set_context" c:identifier="gst_element_set_context">
<doc xml:space="preserve">Sets the context of the element. Increases the refcount of the context.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">the #GstContext to set.</doc>
<type name="Context" c:type="GstContext*"/>
</parameter>
</parameters>
</method>
<method name="set_locked_state" c:identifier="gst_element_set_locked_state">
<doc xml:space="preserve">Locks the state of an element, so state changes of the parent don't affect
this element anymore.
Note that this is racy if the state lock of the parent bin is not taken.
The parent bin might've just checked the flag in another thread and as the
next step proceed to change the child element's state.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the state was changed, %FALSE if bad parameters were given
or the elements state-locking needed no change.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="locked_state" transfer-ownership="none">
<doc xml:space="preserve">%TRUE to lock the element's state</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_start_time" c:identifier="gst_element_set_start_time">
<doc xml:space="preserve">Set the start time of an element. The start time of the element is the
running time of the element when it last went to the PAUSED state. In READY
or after a flushing seek, it is set to 0.
Toplevel elements like #GstPipeline will manage the start_time and
base_time on its children. Setting the start_time to #GST_CLOCK_TIME_NONE
on such a toplevel element will disable the distribution of the base_time to
the children and can be useful if the application manages the base_time
itself, for example if you want to synchronize capture from multiple
pipelines, and you can also ensure that the pipelines have the same clock.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="time" transfer-ownership="none">
<doc xml:space="preserve">the base time to set.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_state" c:identifier="gst_element_set_state">
<doc xml:space="preserve">Sets the state of the element. This function will try to set the
requested state by going through all the intermediary states and calling
the class's state change function for each.
This function can return #GST_STATE_CHANGE_ASYNC, in which case the
element will perform the remainder of the state change asynchronously in
another thread.
An application can use gst_element_get_state() to wait for the completion
of the state change or it can wait for a %GST_MESSAGE_ASYNC_DONE or
%GST_MESSAGE_STATE_CHANGED on the bus.
State changes to %GST_STATE_READY or %GST_STATE_NULL never return
#GST_STATE_CHANGE_ASYNC.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Result of the state change using #GstStateChangeReturn.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to change state of.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">the element's new #GstState.</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</method>
<method name="sync_state_with_parent" c:identifier="gst_element_sync_state_with_parent">
<doc xml:space="preserve">Tries to change the state of the element to the same as its parent.
If this function returns %FALSE, the state of element is undefined.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the element's state could be synced to the parent's state.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
</parameters>
</method>
<method name="unlink" c:identifier="gst_element_unlink">
<doc xml:space="preserve">Unlinks all source pads of the source element with all sink pads
of the sink element to which they are linked.
If the link has been made using gst_element_link(), it could have created an
requestpad, which has to be released using gst_element_release_request_pad().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the source #GstElement to unlink.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstElement to unlink.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</method>
<method name="unlink_many" c:identifier="gst_element_unlink_many" introspectable="0">
<doc xml:space="preserve">Unlinks a series of elements. Uses gst_element_unlink().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="element_1" transfer-ownership="none">
<doc xml:space="preserve">the first #GstElement in the link chain.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="element_2" transfer-ownership="none">
<doc xml:space="preserve">the second #GstElement in the link chain.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the %NULL-terminated list of elements to unlink in order.</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="unlink_pads" c:identifier="gst_element_unlink_pads">
<doc xml:space="preserve">Unlinks the two named pads of the source and destination elements.
This is a convenience function for gst_pad_unlink().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a (transfer none): #GstElement containing the source pad.</doc>
<type name="Element" c:type="GstElement*"/>
</instance-parameter>
<parameter name="srcpadname" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstPad in source element.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement containing the destination pad.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="destpadname" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstPad in destination element.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="state_lock">
<doc xml:space="preserve">Used to serialize execution of gst_element_set_state()</doc>
<type name="GLib.RecMutex" c:type="GRecMutex"/>
</field>
<field name="state_cond">
<doc xml:space="preserve">Used to signal completion of a state change</doc>
<type name="GLib.Cond" c:type="GCond"/>
</field>
<field name="state_cookie">
<doc xml:space="preserve">Used to detect concurrent execution of
gst_element_set_state() and gst_element_get_state()</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="target_state">
<doc xml:space="preserve">the target state of an element as set by the application</doc>
<type name="State" c:type="GstState"/>
</field>
<field name="current_state">
<doc xml:space="preserve">the current state of an element</doc>
<type name="State" c:type="GstState"/>
</field>
<field name="next_state">
<doc xml:space="preserve">the next state of an element, can be #GST_STATE_VOID_PENDING if
the element is in the correct state.</doc>
<type name="State" c:type="GstState"/>
</field>
<field name="pending_state">
<doc xml:space="preserve">the final state the element should go to, can be
#GST_STATE_VOID_PENDING if the element is in the correct state</doc>
<type name="State" c:type="GstState"/>
</field>
<field name="last_return">
<doc xml:space="preserve">the last return value of an element state change</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</field>
<field name="bus">
<doc xml:space="preserve">the bus of the element. This bus is provided to the element by the
parent element or the application. A #GstPipeline has a bus of its own.</doc>
<type name="Bus" c:type="GstBus*"/>
</field>
<field name="clock">
<doc xml:space="preserve">the clock of the element. This clock is usually provided to the
element by the toplevel #GstPipeline.</doc>
<type name="Clock" c:type="GstClock*"/>
</field>
<field name="base_time">
<doc xml:space="preserve">the time of the clock right before the element is set to
PLAYING. Subtracting @base_time from the current clock time in the PLAYING
state will yield the running_time against the clock.</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</field>
<field name="start_time">
<doc xml:space="preserve">the running_time of the last PAUSED state</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="numpads">
<doc xml:space="preserve">number of pads of the element, includes both source and sink pads.</doc>
<type name="guint16" c:type="guint16"/>
</field>
<field name="pads">
<doc xml:space="preserve">list of pads</doc>
<type name="GLib.List" c:type="GList*">
<type name="Pad"/>
</type>
</field>
<field name="numsrcpads">
<doc xml:space="preserve">number of source pads of the element.</doc>
<type name="guint16" c:type="guint16"/>
</field>
<field name="srcpads">
<doc xml:space="preserve">list of source pads</doc>
<type name="GLib.List" c:type="GList*">
<type name="Pad"/>
</type>
</field>
<field name="numsinkpads">
<doc xml:space="preserve">number of sink pads of the element.</doc>
<type name="guint16" c:type="guint16"/>
</field>
<field name="sinkpads">
<doc xml:space="preserve">list of sink pads</doc>
<type name="GLib.List" c:type="GList*">
<type name="Pad"/>
</type>
</field>
<field name="pads_cookie">
<doc xml:space="preserve">updated whenever the a pad is added or removed</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="contexts">
<doc xml:space="preserve">list of contexts</doc>
<type name="GLib.List" c:type="GList*">
<type name="Context"/>
</type>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="3">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="no-more-pads" when="last">
<doc xml:space="preserve">This signals that the element will not generate more dynamic pads.
Note that this signal will usually be emitted from the context of
the streaming thread.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</glib:signal>
<glib:signal name="pad-added" when="last">
<doc xml:space="preserve">a new #GstPad has been added to the element. Note that this signal will
usually be emitted from the context of the streaming thread. Also keep in
mind that if you add new elements to the pipeline in the signal handler
you will need to set them to the desired target state with
gst_element_set_state() or gst_element_sync_state_with_parent().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="new_pad" transfer-ownership="none">
<doc xml:space="preserve">the pad that has been added</doc>
<type name="Pad"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="pad-removed" when="last">
<doc xml:space="preserve">a #GstPad has been removed from the element</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="old_pad" transfer-ownership="none">
<doc xml:space="preserve">the pad that has been removed</doc>
<type name="Pad"/>
</parameter>
</parameters>
</glib:signal>
</class>
<callback name="ElementCallAsyncFunc" c:type="GstElementCallAsyncFunc">
<doc xml:space="preserve">Callback prototype used in #gst_element_call_async</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">The #GstElement this function has been called against</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">Data passed in the function where that callback has been passed</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="ElementClass" c:type="GstElementClass" glib:is-gtype-struct-for="Element">
<doc xml:space="preserve">GStreamer element class. Override the vmethods to implement the element
functionality.</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent class structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="metadata">
<doc xml:space="preserve">metadata for elements of this class</doc>
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="elementfactory">
<doc xml:space="preserve">the #GstElementFactory that creates these elements</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</field>
<field name="padtemplates">
<doc xml:space="preserve">a #GList of #GstPadTemplate</doc>
<type name="GLib.List" c:type="GList*">
<type name="gpointer" c:type="gpointer"/>
</type>
</field>
<field name="numpadtemplates">
<doc xml:space="preserve">the number of padtemplates</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="pad_templ_cookie">
<doc xml:space="preserve">changed whenever the padtemplates change</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="pad_added">
<callback name="pad_added">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="pad_removed">
<callback name="pad_removed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="no_more_pads">
<callback name="no_more_pads">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="request_new_pad">
<callback name="request_new_pad">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">requested #GstPad if found,
otherwise %NULL. Release after usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to find a request pad of.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate of which we want a pad of.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the request #GstPad
to retrieve. Can be %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the caps of the pad we want to
request. Can be %NULL.</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="release_pad">
<callback name="release_pad">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_state">
<callback name="get_state">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%GST_STATE_CHANGE_SUCCESS if the element has no more pending state
and the last state change succeeded, %GST_STATE_CHANGE_ASYNC if the
element is still performing a state change or
%GST_STATE_CHANGE_FAILURE if the last state change failed.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to get the state of.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="state" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the state.
Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="pending" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to #GstState to hold the pending
state. Can be %NULL.</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a #GstClockTime to specify the timeout for an async
state change or %GST_CLOCK_TIME_NONE for infinite timeout.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_state">
<callback name="set_state">
<return-value transfer-ownership="none">
<doc xml:space="preserve">Result of the state change using #GstStateChangeReturn.
MT safe.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to change state of.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">the element's new #GstState.</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</callback>
</field>
<field name="change_state">
<callback name="change_state">
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstStateChangeReturn of the state transition.</doc>
<type name="StateChangeReturn" c:type="GstStateChangeReturn"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="transition" transfer-ownership="none">
<doc xml:space="preserve">the requested transition</doc>
<type name="StateChange" c:type="GstStateChange"/>
</parameter>
</parameters>
</callback>
</field>
<field name="state_changed">
<callback name="state_changed">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="oldstate" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="newstate" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="pending" transfer-ownership="none">
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_bus">
<callback name="set_bus">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the bus of.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="bus" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstBus to set.</doc>
<type name="Bus" c:type="GstBus*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="provide_clock">
<callback name="provide_clock">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GstClock provided by the
element or %NULL if no clock could be provided. Unref after usage.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to query</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_clock">
<callback name="set_clock">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the element accepted the clock. An element can refuse a
clock when it, for example, is not able to slave its internal clock to the
@clock or when it requires a specific clock to operate.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the clock for.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstClock to set for the element.</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="send_event">
<callback name="send_event">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled. Events that trigger a preroll (such
as flushing seeks and steps) will emit %GST_MESSAGE_ASYNC_DONE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to send the event to.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to send to the element.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="query">
<callback name="query">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to perform the query on.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="post_message">
<callback name="post_message">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the message was successfully posted. The function returns
%FALSE if the element did not have a bus.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement posting the message</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="message" transfer-ownership="full">
<doc xml:space="preserve">a #GstMessage to post</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_context">
<callback name="set_context">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">a #GstElement to set the context of.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">the #GstContext to set.</doc>
<type name="Context" c:type="GstContext*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="18">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<method name="add_metadata" c:identifier="gst_element_class_add_metadata">
<doc xml:space="preserve">Set @key with @value as metadata in @klass.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the value to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="add_pad_template" c:identifier="gst_element_class_add_pad_template">
<doc xml:space="preserve">Adds a padtemplate to an element class. This is mainly used in the _class_init
functions of classes. If a pad template with the same name as an already
existing one is added the old one is replaced by the new one.
@templ's reference count will be incremented, and any floating
reference will be removed (see gst_object_ref_sink())</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">the #GstElementClass to add the pad template to.</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate to add to the element class.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
</parameters>
</method>
<method name="add_static_metadata" c:identifier="gst_element_class_add_static_metadata">
<doc xml:space="preserve">Set @key with @value as metadata in @klass.
Same as gst_element_class_add_metadata(), but @value must be a static string
or an inlined string, as it will not be copied. (GStreamer plugins will
be made resident once loaded, so this function can be used even from
dynamically loaded plugins.)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the value to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="add_static_pad_template" c:identifier="gst_element_class_add_static_pad_template" version="1.8">
<doc xml:space="preserve">Adds a pad template to an element class based on the static pad template
@templ. This is mainly used in the _class_init functions of element
implementations. If a pad template with the same name already exists,
the old one is replaced by the new one.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">the #GstElementClass to add the pad template to.</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="static_templ" transfer-ownership="none">
<doc xml:space="preserve">#GstStaticPadTemplate to add as pad template to the element class.</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</parameter>
</parameters>
</method>
<method name="add_static_pad_template_with_gtype" c:identifier="gst_element_class_add_static_pad_template_with_gtype" version="1.14">
<doc xml:space="preserve">Adds a pad template to an element class based on the static pad template
@templ. This is mainly used in the _class_init functions of element
implementations. If a pad template with the same name already exists,
the old one is replaced by the new one.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">the #GstElementClass to add the pad template to.</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="static_templ" transfer-ownership="none">
<doc xml:space="preserve">#GstStaticPadTemplate to add as pad template to the element class.</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</parameter>
<parameter name="pad_type" transfer-ownership="none">
<doc xml:space="preserve">The #GType of the pad to create</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_element_class_get_metadata">
<doc xml:space="preserve">Get metadata with @key in @klass.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the metadata for @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to get metadata for</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">the key to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_pad_template" c:identifier="gst_element_class_get_pad_template">
<doc xml:space="preserve">Retrieves a padtemplate from @element_class with the given name.
&gt; If you use this function in the #GInstanceInitFunc of an object class
&gt; that has subclasses, make sure to pass the g_class parameter of the
&gt; #GInstanceInitFunc here.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstPadTemplate with the
given name, or %NULL if none was found. No unreferencing is
necessary.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<instance-parameter name="element_class" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementClass to get the pad template of.</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstPadTemplate to get.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_pad_template_list" c:identifier="gst_element_class_get_pad_template_list">
<doc xml:space="preserve">Retrieves a list of the pad templates associated with @element_class. The
list must not be modified by the calling code.
&gt; If you use this function in the #GInstanceInitFunc of an object class
&gt; that has subclasses, make sure to pass the g_class parameter of the
&gt; #GInstanceInitFunc here.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GList of
pad templates.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PadTemplate"/>
</type>
</return-value>
<parameters>
<instance-parameter name="element_class" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementClass to get pad templates of.</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_metadata" c:identifier="gst_element_class_set_metadata">
<doc xml:space="preserve">Sets the detailed information for a #GstElementClass.
&gt; This function is for use in _class_init functions only.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="longname" transfer-ownership="none">
<doc xml:space="preserve">The long English name of the element. E.g. "File Sink"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="classification" transfer-ownership="none">
<doc xml:space="preserve">String describing the type of element, as an unordered list
separated with slashes ('/'). See draft-klass.txt of the design docs
for more details and common types. E.g: "Sink/File"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">Sentence describing the purpose of the element.
E.g: "Write stream to a file"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="author" transfer-ownership="none">
<doc xml:space="preserve">Name and contact details of the author(s). Use \n to separate
multiple author metadata. E.g: "Joe Bloggs &amp;lt;joe.blogs at foo.com&amp;gt;"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_static_metadata" c:identifier="gst_element_class_set_static_metadata">
<doc xml:space="preserve">Sets the detailed information for a #GstElementClass.
&gt; This function is for use in _class_init functions only.
Same as gst_element_class_set_metadata(), but @longname, @classification,
@description, and @author must be static strings or inlined strings, as
they will not be copied. (GStreamer plugins will be made resident once
loaded, so this function can be used even from dynamically loaded plugins.)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="klass" transfer-ownership="none">
<doc xml:space="preserve">class to set metadata for</doc>
<type name="ElementClass" c:type="GstElementClass*"/>
</instance-parameter>
<parameter name="longname" transfer-ownership="none">
<doc xml:space="preserve">The long English name of the element. E.g. "File Sink"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="classification" transfer-ownership="none">
<doc xml:space="preserve">String describing the type of element, as an unordered list
separated with slashes ('/'). See draft-klass.txt of the design docs
for more details and common types. E.g: "Sink/File"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">Sentence describing the purpose of the element.
E.g: "Write stream to a file"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="author" transfer-ownership="none">
<doc xml:space="preserve">Name and contact details of the author(s). Use \n to separate
multiple author metadata. E.g: "Joe Bloggs &amp;lt;joe.blogs at foo.com&amp;gt;"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
</record>
<class name="ElementFactory" c:symbol-prefix="element_factory" c:type="GstElementFactory" parent="PluginFeature" glib:type-name="GstElementFactory" glib:get-type="gst_element_factory_get_type" glib:type-struct="ElementFactoryClass">
<doc xml:space="preserve">#GstElementFactory is used to create instances of elements. A
GstElementFactory can be added to a #GstPlugin as it is also a
#GstPluginFeature.
Use the gst_element_factory_find() and gst_element_factory_create()
functions to create element instances or use gst_element_factory_make() as a
convenient shortcut.
The following code example shows you how to create a GstFileSrc element.
## Using an element factory
|[&lt;!-- language="C" --&gt;
#include &amp;lt;gst/gst.h&amp;gt;
GstElement *src;
GstElementFactory *srcfactory;
gst_init (&amp;amp;argc, &amp;amp;argv);
srcfactory = gst_element_factory_find ("filesrc");
g_return_if_fail (srcfactory != NULL);
src = gst_element_factory_create (srcfactory, "src");
g_return_if_fail (src != NULL);
...
]|</doc>
<function name="find" c:identifier="gst_element_factory_find">
<doc xml:space="preserve">Search for an element factory of the given name. Refs the returned
element factory; caller is responsible for unreffing.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">#GstElementFactory if found,
%NULL otherwise</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of factory to find</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="list_filter" c:identifier="gst_element_factory_list_filter">
<doc xml:space="preserve">Filter out all the elementfactories in @list that can handle @caps in
the given direction.
If @subsetonly is %TRUE, then only the elements whose pads templates
are a complete superset of @caps will be returned. Else any element
whose pad templates caps can intersect with @caps will be returned.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstElementFactory elements that match the given requisites.
Use #gst_plugin_feature_list_free after usage.</doc>
<type name="GLib.List" c:type="GList*">
<type name="ElementFactory"/>
</type>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GList of
#GstElementFactory to filter</doc>
<type name="GLib.List" c:type="GList*">
<type name="ElementFactory"/>
</type>
</parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
<parameter name="direction" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadDirection to filter on</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
<parameter name="subsetonly" transfer-ownership="none">
<doc xml:space="preserve">whether to filter on caps subsets or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="list_get_elements" c:identifier="gst_element_factory_list_get_elements">
<doc xml:space="preserve">Get a list of factories that match the given @type. Only elements
with a rank greater or equal to @minrank will be returned.
The list of factories is returned by decreasing rank.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstElementFactory elements. Use gst_plugin_feature_list_free() after
usage.</doc>
<type name="GLib.List" c:type="GList*">
<type name="ElementFactory"/>
</type>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactoryListType</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</parameter>
<parameter name="minrank" transfer-ownership="none">
<doc xml:space="preserve">Minimum rank</doc>
<type name="Rank" c:type="GstRank"/>
</parameter>
</parameters>
</function>
<function name="make" c:identifier="gst_element_factory_make">
<doc xml:space="preserve">Create a new element of the type defined by the given element factory.
If name is %NULL, then the element will receive a guaranteed unique name,
consisting of the element factory name and a number.
If name is given, it will be given the name supplied.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">new #GstElement or %NULL
if unable to create element</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="factoryname" transfer-ownership="none">
<doc xml:space="preserve">a named factory to instantiate</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new element, or %NULL to automatically create
a unique name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<method name="can_sink_all_caps" c:identifier="gst_element_factory_can_sink_all_caps">
<doc xml:space="preserve">Checks if the factory can sink all possible capabilities.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the caps are fully compatible.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to query</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the caps to check</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="can_sink_any_caps" c:identifier="gst_element_factory_can_sink_any_caps">
<doc xml:space="preserve">Checks if the factory can sink any possible capability.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the caps have a common subset.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to query</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the caps to check</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="can_src_all_caps" c:identifier="gst_element_factory_can_src_all_caps">
<doc xml:space="preserve">Checks if the factory can src all possible capabilities.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the caps are fully compatible.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to query</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the caps to check</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="can_src_any_caps" c:identifier="gst_element_factory_can_src_any_caps">
<doc xml:space="preserve">Checks if the factory can src any possible capability.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the caps have a common subset.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to query</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the caps to check</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="create" c:identifier="gst_element_factory_create">
<doc xml:space="preserve">Create a new element of the type defined by the given elementfactory.
It will be given the name supplied, since all elements require a name as
their first argument.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">new #GstElement or %NULL
if the element couldn't be created</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to instantiate</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new element, or %NULL to automatically create
a unique name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_element_type" c:identifier="gst_element_factory_get_element_type">
<doc xml:space="preserve">Get the #GType for elements managed by this factory. The type can
only be retrieved if the element factory is loaded, which can be
assured with gst_plugin_feature_load().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GType for elements managed by this factory or 0 if
the factory is not loaded.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to get managed #GType from</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_metadata" c:identifier="gst_element_factory_get_metadata">
<doc xml:space="preserve">Get the metadata on @factory with @key.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the metadata with @key on @factory or %NULL
when there was no metadata with the given @key.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="key" transfer-ownership="none">
<doc xml:space="preserve">a key</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_metadata_keys" c:identifier="gst_element_factory_get_metadata_keys">
<doc xml:space="preserve">Get the available keys for the metadata on @factory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">
a %NULL-terminated array of key strings, or %NULL when there is no
metadata. Free with g_strfreev() when no longer needed.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_num_pad_templates" c:identifier="gst_element_factory_get_num_pad_templates">
<doc xml:space="preserve">Gets the number of pad_templates in this factory.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of pad_templates</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_static_pad_templates" c:identifier="gst_element_factory_get_static_pad_templates">
<doc xml:space="preserve">Gets the #GList of #GstStaticPadTemplate for this factory.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the
static pad templates</doc>
<type name="GLib.List" c:type="const GList*">
<type name="StaticPadTemplate"/>
</type>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_uri_protocols" c:identifier="gst_element_factory_get_uri_protocols">
<doc xml:space="preserve">Gets a %NULL-terminated array of protocols this element supports or %NULL if
no protocols are supported. You may not change the contents of the returned
array, as it is still owned by the element factory. Use g_strdupv() to
make a copy of the protocol string array if you need to.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the supported protocols
or %NULL</doc>
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_uri_type" c:identifier="gst_element_factory_get_uri_type">
<doc xml:space="preserve">Gets the type of URIs the element supports or #GST_URI_UNKNOWN if none.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">type of URIs this element supports</doc>
<type name="URIType" c:type="GstURIType"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_interface" c:identifier="gst_element_factory_has_interface">
<doc xml:space="preserve">Check if @factory implements the interface with name @interfacename.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @factory implement the interface.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="interfacename" transfer-ownership="none">
<doc xml:space="preserve">an interface name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="list_is_type" c:identifier="gst_element_factory_list_is_type">
<doc xml:space="preserve">Check if @factory is of the given types.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @factory is of @type.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactory</doc>
<type name="ElementFactory" c:type="GstElementFactory*"/>
</instance-parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstElementFactoryListType</doc>
<type name="ElementFactoryListType" c:type="GstElementFactoryListType"/>
</parameter>
</parameters>
</method>
</class>
<record name="ElementFactoryClass" c:type="GstElementFactoryClass" disguised="1" glib:is-gtype-struct-for="ElementFactory"/>
<bitfield name="ElementFlags" glib:type-name="GstElementFlags" glib:get-type="gst_element_flags_get_type" c:type="GstElementFlags">
<doc xml:space="preserve">The standard flags that an element may have.</doc>
<member name="locked_state" value="16" c:identifier="GST_ELEMENT_FLAG_LOCKED_STATE" glib:nick="locked-state">
<doc xml:space="preserve">ignore state changes from parent</doc>
</member>
<member name="sink" value="32" c:identifier="GST_ELEMENT_FLAG_SINK" glib:nick="sink">
<doc xml:space="preserve">the element is a sink</doc>
</member>
<member name="source" value="64" c:identifier="GST_ELEMENT_FLAG_SOURCE" glib:nick="source">
<doc xml:space="preserve">the element is a source.</doc>
</member>
<member name="provide_clock" value="128" c:identifier="GST_ELEMENT_FLAG_PROVIDE_CLOCK" glib:nick="provide-clock">
<doc xml:space="preserve">the element can provide a clock</doc>
</member>
<member name="require_clock" value="256" c:identifier="GST_ELEMENT_FLAG_REQUIRE_CLOCK" glib:nick="require-clock">
<doc xml:space="preserve">the element requires a clock</doc>
</member>
<member name="indexable" value="512" c:identifier="GST_ELEMENT_FLAG_INDEXABLE" glib:nick="indexable">
<doc xml:space="preserve">the element can use an index</doc>
</member>
<member name="last" value="16384" c:identifier="GST_ELEMENT_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">offset to define more flags</doc>
</member>
</bitfield>
<callback name="ElementForeachPadFunc" c:type="GstElementForeachPadFunc" version="1.14">
<doc xml:space="preserve">Function called for each pad when using gst_element_foreach_sink_pad(),
gst_element_foreach_src_pad(), or gst_element_foreach_pad().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE to stop iterating pads, %TRUE to continue</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="element" transfer-ownership="none">
<doc xml:space="preserve">the #GstElement</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data passed to the foreach function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="Event" c:type="GstEvent" glib:type-name="GstEvent" glib:get-type="gst_event_get_type" c:symbol-prefix="event">
<doc xml:space="preserve">The event class provides factory methods to construct events for sending
and functions to query (parse) received events.
Events are usually created with gst_event_new_*() which takes event-type
specific parameters as arguments.
To send an event application will usually use gst_element_send_event() and
elements will use gst_pad_send_event() or gst_pad_push_event().
The event should be unreffed with gst_event_unref() if it has not been sent.
Events that have been received can be parsed with their respective
gst_event_parse_*() functions. It is valid to pass %NULL for unwanted details.
Events are passed between elements in parallel to the data stream. Some events
are serialized with buffers, others are not. Some events only travel downstream,
others only upstream. Some events can travel both upstream and downstream.
The events are used to signal special conditions in the datastream such as
EOS (end of stream) or the start of a new stream-segment.
Events are also used to flush the pipeline of any pending data.
Most of the event API is used inside plugins. Applications usually only
construct and use seek events.
To do that gst_event_new_seek() is used to create a seek event. It takes
the needed parameters to specify seeking time and mode.
|[&lt;!-- language="C" --&gt;
GstEvent *event;
gboolean result;
...
// construct a seek event to play the media from second 2 to 5, flush
// the pipeline to decrease latency.
event = gst_event_new_seek (1.0,
GST_FORMAT_TIME,
GST_SEEK_FLAG_FLUSH,
GST_SEEK_TYPE_SET, 2 * GST_SECOND,
GST_SEEK_TYPE_SET, 5 * GST_SECOND);
...
result = gst_element_send_event (pipeline, event);
if (!result)
g_warning ("seek failed");
...
]|</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">the parent structure</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<field name="type" writable="1">
<doc xml:space="preserve">the #GstEventType of the event</doc>
<type name="EventType" c:type="GstEventType"/>
</field>
<field name="timestamp" writable="1">
<doc xml:space="preserve">the timestamp of the event</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="seqnum" writable="1">
<doc xml:space="preserve">the sequence number of the event</doc>
<type name="guint32" c:type="guint32"/>
</field>
<constructor name="new_buffer_size" c:identifier="gst_event_new_buffer_size">
<doc xml:space="preserve">Create a new buffersize event. The event is sent downstream and notifies
elements that they should provide a buffer of the specified dimensions.
When the @async flag is set, a thread boundary is preferred.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">buffer format</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="minsize" transfer-ownership="none">
<doc xml:space="preserve">minimum buffer size</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">maximum buffer size</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="async" transfer-ownership="none">
<doc xml:space="preserve">thread behavior</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_caps" c:identifier="gst_event_new_caps">
<doc xml:space="preserve">Create a new CAPS event for @caps. The caps event can only travel downstream
synchronized with the buffer flow and contains the format of the buffers
that will follow after the event.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new CAPS event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_custom" c:identifier="gst_event_new_custom">
<doc xml:space="preserve">Create a new custom-typed event. This can be used for anything not
handled by other event-specific functions to pass an event to another
element.
Make sure to allocate an event type with the #GST_EVENT_MAKE_TYPE macro,
assigning a free number and filling in the correct direction and
serialization flags.
New custom events can also be created by subclassing the event type if
needed.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new custom event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">The type of the new event</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the structure for the event. The event will
take ownership of the structure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_eos" c:identifier="gst_event_new_eos">
<doc xml:space="preserve">Create a new EOS event. The eos event can only travel downstream
synchronized with the buffer flow. Elements that receive the EOS
event on a pad can return #GST_FLOW_EOS as a #GstFlowReturn
when data after the EOS event arrives.
The EOS event will travel down to the sink elements in the pipeline
which will then post the #GST_MESSAGE_EOS on the bus after they have
finished playing any buffered data.
When all sinks have posted an EOS message, an EOS message is
forwarded to the application.
The EOS event itself will not cause any state transitions of the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new EOS event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
</constructor>
<constructor name="new_flush_start" c:identifier="gst_event_new_flush_start">
<doc xml:space="preserve">Allocate a new flush start event. The flush start event can be sent
upstream and downstream and travels out-of-bounds with the dataflow.
It marks pads as being flushing and will make them return
#GST_FLOW_FLUSHING when used for data flow with gst_pad_push(),
gst_pad_chain(), gst_pad_get_range() and gst_pad_pull_range().
Any event (except a #GST_EVENT_FLUSH_STOP) received
on a flushing pad will return %FALSE immediately.
Elements should unlock any blocking functions and exit their streaming
functions as fast as possible when this event is received.
This event is typically generated after a seek to flush out all queued data
in the pipeline so that the new media is played as soon as possible.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new flush start event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
</constructor>
<constructor name="new_flush_stop" c:identifier="gst_event_new_flush_stop">
<doc xml:space="preserve">Allocate a new flush stop event. The flush stop event can be sent
upstream and downstream and travels serialized with the dataflow.
It is typically sent after sending a FLUSH_START event to make the
pads accept data again.
Elements can process this event synchronized with the dataflow since
the preceding FLUSH_START event stopped the dataflow.
This event is typically generated to complete a seek and to resume
dataflow.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new flush stop event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="reset_time" transfer-ownership="none">
<doc xml:space="preserve">if time should be reset</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_gap" c:identifier="gst_event_new_gap">
<doc xml:space="preserve">Create a new GAP event. A gap event can be thought of as conceptually
equivalent to a buffer to signal that there is no data for a certain
amount of time. This is useful to signal a gap to downstream elements
which may wait for data, such as muxers or mixers or overlays, especially
for sparse streams such as subtitle streams.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new GAP event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the start time (pts) of the gap</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="duration" transfer-ownership="none">
<doc xml:space="preserve">the duration of the gap</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_instant_rate_change" c:identifier="gst_event_new_instant_rate_change" version="1.18">
<doc xml:space="preserve">Create a new instant-rate-change event. This event is sent by seek
handlers (e.g. demuxers) when receiving a seek with the
%GST_SEEK_FLAG_INSTANT_RATE_CHANGE and signals to downstream elements that
the playback rate in the existing segment should be immediately multiplied
by the @rate_multiplier factor.
The flags provided replace any flags in the existing segment, for the
flags within the %GST_SEGMENT_INSTANT_FLAGS set. Other GstSegmentFlags
are ignored and not transferred in the event.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new instant-rate-change event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="rate_multiplier" transfer-ownership="none">
<doc xml:space="preserve">the multiplier to be applied to the playback rate</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="new_flags" transfer-ownership="none">
<doc xml:space="preserve">A new subset of segment flags to replace in segments</doc>
<type name="SegmentFlags" c:type="GstSegmentFlags"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_instant_rate_sync_time" c:identifier="gst_event_new_instant_rate_sync_time" version="1.18">
<doc xml:space="preserve">Create a new instant-rate-sync-time event. This event is sent by the
pipeline to notify elements handling the instant-rate-change event about
the running-time when the new rate should be applied. The running time
may be in the past when elements handle this event, which can lead to
switching artifacts. The magnitude of those depends on the exact timing
of event delivery to each element and the magnitude of the change in
playback rate being applied.
The @running_time and @upstream_running_time are the same if this
is the first instant-rate adjustment, but will differ for later ones
to compensate for the accumulated offset due to playing at a rate
different to the one indicated in the playback segments.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new instant-rate-sync-time event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="rate_multiplier" transfer-ownership="none">
<doc xml:space="preserve">the new playback rate multiplier to be applied</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">Running time when the rate change should be applied</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="upstream_running_time" transfer-ownership="none">
<doc xml:space="preserve">The upstream-centric running-time when the
rate change should be applied.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_latency" c:identifier="gst_event_new_latency">
<doc xml:space="preserve">Create a new latency event. The event is sent upstream from the sinks and
notifies elements that they should add an additional @latency to the
running time before synchronising against the clock.
The latency is mostly used in live sinks and is always expressed in
the time format.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="latency" transfer-ownership="none">
<doc xml:space="preserve">the new latency value</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_navigation" c:identifier="gst_event_new_navigation">
<doc xml:space="preserve">Create a new navigation event from the given description.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">description of the event. The event will take
ownership of the structure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_protection" c:identifier="gst_event_new_protection" version="1.6">
<doc xml:space="preserve">Creates a new event containing information specific to a particular
protection system (uniquely identified by @system_id), by which that
protection system can acquire key(s) to decrypt a protected stream.
In order for a decryption element to decrypt media
protected using a specific system, it first needs all the
protection system specific information necessary to acquire the decryption
key(s) for that stream. The functions defined here enable this information
to be passed in events from elements that extract it
(e.g., ISOBMFF demuxers, MPEG DASH demuxers) to protection decrypter
elements that use it.
Events containing protection system specific information are created using
#gst_event_new_protection, and they can be parsed by downstream elements
using #gst_event_parse_protection.
In Common Encryption, protection system specific information may be located
within ISOBMFF files, both in movie (moov) boxes and movie fragment (moof)
boxes; it may also be contained in ContentProtection elements within MPEG
DASH MPDs. The events created by #gst_event_new_protection contain data
identifying from which of these locations the encapsulated protection system
specific information originated. This origin information is required as
some protection systems use different encodings depending upon where the
information originates.
The events returned by gst_event_new_protection() are implemented
in such a way as to ensure that the most recently-pushed protection info
event of a particular @origin and @system_id will
be stuck to the output pad of the sending element.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GST_EVENT_PROTECTION event, if successful; %NULL
if unsuccessful.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="system_id" transfer-ownership="none">
<doc xml:space="preserve">a string holding a UUID that uniquely
identifies a protection system.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="data" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer holding protection system specific
information. The reference count of the buffer will be incremented by one.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="origin" transfer-ownership="none">
<doc xml:space="preserve">a string indicating where the protection
information carried in the event was extracted from. The allowed values
of this string will depend upon the protection scheme.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_qos" c:identifier="gst_event_new_qos">
<doc xml:space="preserve">Allocate a new qos event with the given values.
The QOS event is generated in an element that wants an upstream
element to either reduce or increase its rate because of
high/low CPU load or other resource usage such as network performance or
throttling. Typically sinks generate these events for each buffer
they receive.
@type indicates the reason for the QoS event. #GST_QOS_TYPE_OVERFLOW is
used when a buffer arrived in time or when the sink cannot keep up with
the upstream datarate. #GST_QOS_TYPE_UNDERFLOW is when the sink is not
receiving buffers fast enough and thus has to drop late buffers.
#GST_QOS_TYPE_THROTTLE is used when the datarate is artificially limited
by the application, for example to reduce power consumption.
@proportion indicates the real-time performance of the streaming in the
element that generated the QoS event (usually the sink). The value is
generally computed based on more long term statistics about the streams
timestamps compared to the clock.
A value &lt; 1.0 indicates that the upstream element is producing data faster
than real-time. A value &gt; 1.0 indicates that the upstream element is not
producing data fast enough. 1.0 is the ideal @proportion value. The
proportion value can safely be used to lower or increase the quality of
the element.
@diff is the difference against the clock in running time of the last
buffer that caused the element to generate the QOS event. A negative value
means that the buffer with @timestamp arrived in time. A positive value
indicates how late the buffer with @timestamp was. When throttling is
enabled, @diff will be set to the requested throttling interval.
@timestamp is the timestamp of the last buffer that cause the element
to generate the QOS event. It is expressed in running time and thus an ever
increasing value.
The upstream element can use the @diff and @timestamp values to decide
whether to process more buffers. For positive @diff, all buffers with
timestamp &lt;= @timestamp + @diff will certainly arrive late in the sink
as well. A (negative) @diff value so that @timestamp + @diff would yield a
result smaller than 0 is not allowed.
The application can use general event probes to intercept the QoS
event and implement custom application specific QoS handling.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new QOS event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the QoS type</doc>
<type name="QOSType" c:type="GstQOSType"/>
</parameter>
<parameter name="proportion" transfer-ownership="none">
<doc xml:space="preserve">the proportion of the qos message</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="diff" transfer-ownership="none">
<doc xml:space="preserve">The time difference of the last Clock sync</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">The timestamp of the buffer</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_reconfigure" c:identifier="gst_event_new_reconfigure">
<doc xml:space="preserve">Create a new reconfigure event. The purpose of the reconfigure event is
to travel upstream and make elements renegotiate their caps or reconfigure
their buffer pools. This is useful when changing properties on elements
or changing the topology of the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
</constructor>
<constructor name="new_seek" c:identifier="gst_event_new_seek">
<doc xml:space="preserve">Allocate a new seek event with the given parameters.
The seek event configures playback of the pipeline between @start to @stop
at the speed given in @rate, also called a playback segment.
The @start and @stop values are expressed in @format.
A @rate of 1.0 means normal playback rate, 2.0 means double speed.
Negatives values means backwards playback. A value of 0.0 for the
rate is not allowed and should be accomplished instead by PAUSING the
pipeline.
A pipeline has a default playback segment configured with a start
position of 0, a stop position of -1 and a rate of 1.0. The currently
configured playback segment can be queried with #GST_QUERY_SEGMENT.
@start_type and @stop_type specify how to adjust the currently configured
start and stop fields in playback segment. Adjustments can be made relative
or absolute to the last configured values. A type of #GST_SEEK_TYPE_NONE
means that the position should not be updated.
When the rate is positive and @start has been updated, playback will start
from the newly configured start position.
For negative rates, playback will start from the newly configured stop
position (if any). If the stop position is updated, it must be different from
-1 (#GST_CLOCK_TIME_NONE) for negative rates.
It is not possible to seek relative to the current playback position, to do
this, PAUSE the pipeline, query the current playback position with
#GST_QUERY_POSITION and update the playback segment current position with a
#GST_SEEK_TYPE_SET to the desired position.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new seek event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">The new playback rate</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format of the seek values</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">The optional seek flags</doc>
<type name="SeekFlags" c:type="GstSeekFlags"/>
</parameter>
<parameter name="start_type" transfer-ownership="none">
<doc xml:space="preserve">The type and flags for the new start position</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">The value of the new start position</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop_type" transfer-ownership="none">
<doc xml:space="preserve">The type and flags for the new stop position</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">The value of the new stop position</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_segment" c:identifier="gst_event_new_segment">
<doc xml:space="preserve">Create a new SEGMENT event for @segment. The segment event can only travel
downstream synchronized with the buffer flow and contains timing information
and playback properties for the buffers that will follow.
The segment event marks the range of buffers to be processed. All
data not within the segment range is not to be processed. This can be
used intelligently by plugins to apply more efficient methods of skipping
unneeded data. The valid range is expressed with the @start and @stop
values.
The time value of the segment is used in conjunction with the start
value to convert the buffer timestamps into the stream time. This is
usually done in sinks to report the current stream_time.
@time represents the stream_time of a buffer carrying a timestamp of
@start. @time cannot be -1.
@start cannot be -1, @stop can be -1. If there
is a valid @stop given, it must be greater or equal the @start, including
when the indicated playback @rate is &lt; 0.
The @applied_rate value provides information about any rate adjustment that
has already been made to the timestamps and content on the buffers of the
stream. (@rate * @applied_rate) should always equal the rate that has been
requested for playback. For example, if an element has an input segment
with intended playback @rate of 2.0 and applied_rate of 1.0, it can adjust
incoming timestamps and buffer content by half and output a segment event
with @rate of 1.0 and @applied_rate of 2.0
After a segment event, the buffer stream time is calculated with:
time + (TIMESTAMP(buf) - start) * ABS (rate * applied_rate)</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new SEGMENT event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment</doc>
<type name="Segment" c:type="const GstSegment*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_segment_done" c:identifier="gst_event_new_segment_done">
<doc xml:space="preserve">Create a new segment-done event. This event is sent by elements that
finish playback of a segment as a result of a segment seek.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format of the position being done</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">The position of the segment being done</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_select_streams" c:identifier="gst_event_new_select_streams" version="1.10">
<doc xml:space="preserve">Allocate a new select-streams event.
The select-streams event requests the specified @streams to be activated.
The list of @streams corresponds to the "Stream ID" of each stream to be
activated. Those ID can be obtained via the #GstStream objects present
in #GST_EVENT_STREAM_START, #GST_EVENT_STREAM_COLLECTION or
#GST_MESSAGE_STREAM_COLLECTION.
Note: The list of @streams can not be empty.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new select-streams event or %NULL in case of
an error (like an empty streams list).</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="streams" transfer-ownership="none">
<doc xml:space="preserve">the list of streams to
activate</doc>
<type name="GLib.List" c:type="GList*">
<type name="utf8"/>
</type>
</parameter>
</parameters>
</constructor>
<constructor name="new_sink_message" c:identifier="gst_event_new_sink_message">
<doc xml:space="preserve">Create a new sink-message event. The purpose of the sink-message event is
to instruct a sink to post the message contained in the event synchronized
with the stream.
@name is used to store multiple sticky events on one pad.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a name for the event</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="msg" transfer-ownership="none">
<doc xml:space="preserve">the #GstMessage to be posted</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_step" c:identifier="gst_event_new_step">
<doc xml:space="preserve">Create a new step event. The purpose of the step event is to instruct a sink
to skip @amount (expressed in @format) of media. It can be used to implement
stepping through the video frame by frame or for doing fast trick modes.
A rate of &lt;= 0.0 is not allowed. Pause the pipeline, for the effect of rate
= 0.0 or first reverse the direction of playback using a seek event to get
the same effect as rate &lt; 0.0.
The @flush flag will clear any pending data in the pipeline before starting
the step operation.
The @intermediate flag instructs the pipeline that this step operation is
part of a larger step operation.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of @amount</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="amount" transfer-ownership="none">
<doc xml:space="preserve">the amount of data to step</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">the step rate</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="flush" transfer-ownership="none">
<doc xml:space="preserve">flushing steps</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="intermediate" transfer-ownership="none">
<doc xml:space="preserve">intermediate steps</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_collection" c:identifier="gst_event_new_stream_collection" version="1.10">
<doc xml:space="preserve">Create a new STREAM_COLLECTION event. The stream collection event can only
travel downstream synchronized with the buffer flow.
Source elements, demuxers and other elements that manage collections
of streams and post #GstStreamCollection messages on the bus also send
this event downstream on each pad involved in the collection, so that
activation of a new collection can be tracked through the downstream
data flow.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new STREAM_COLLECTION event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">Active collection for this data flow</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_group_done" c:identifier="gst_event_new_stream_group_done" version="1.10">
<doc xml:space="preserve">Create a new Stream Group Done event. The stream-group-done event can
only travel downstream synchronized with the buffer flow. Elements
that receive the event on a pad should handle it mostly like EOS,
and emit any data or pending buffers that would depend on more data
arriving and unblock, since there won't be any more data.
This event is followed by EOS at some point in the future, and is
generally used when switching pads - to unblock downstream so that
new pads can be exposed before sending EOS on the existing pads.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new stream-group-done event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="group_id" transfer-ownership="none">
<doc xml:space="preserve">the group id of the stream group which is ending</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_start" c:identifier="gst_event_new_stream_start">
<doc xml:space="preserve">Create a new STREAM_START event. The stream start event can only
travel downstream synchronized with the buffer flow. It is expected
to be the first event that is sent for a new stream.
Source elements, demuxers and other elements that create new streams
are supposed to send this event as the first event of a new stream. It
should not be sent after a flushing seek or in similar situations
and is used to mark the beginning of a new logical stream. Elements
combining multiple streams must ensure that this event is only forwarded
downstream once and not for every single input stream.
The @stream_id should be a unique string that consists of the upstream
stream-id, / as separator and a unique stream-id for this specific
stream. A new stream-id should only be created for a stream if the upstream
stream is split into (potentially) multiple new streams, e.g. in a demuxer,
but not for every single element in the pipeline.
gst_pad_create_stream_id() or gst_pad_create_stream_id_printf() can be
used to create a stream-id. There are no particular semantics for the
stream-id, though it should be deterministic (to support stream matching)
and it might be used to order streams (besides any information conveyed by
stream flags).</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new STREAM_START event.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="stream_id" transfer-ownership="none">
<doc xml:space="preserve">Identifier for this stream</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_tag" c:identifier="gst_event_new_tag">
<doc xml:space="preserve">Generates a metadata tag event from the given @taglist.
The scope of the taglist specifies if the taglist applies to the
complete medium or only to this specific stream. As the tag event
is a sticky event, elements should merge tags received from
upstream with a given scope with their own tags with the same
scope and create a new tag event from it.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="taglist" transfer-ownership="full">
<doc xml:space="preserve">metadata list. The event will take ownership
of the taglist.</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_toc" c:identifier="gst_event_new_toc">
<doc xml:space="preserve">Generate a TOC event from the given @toc. The purpose of the TOC event is to
inform elements that some kind of the TOC was found.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">#GstToc structure.</doc>
<type name="Toc" c:type="GstToc*"/>
</parameter>
<parameter name="updated" transfer-ownership="none">
<doc xml:space="preserve">whether @toc was updated or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_toc_select" c:identifier="gst_event_new_toc_select">
<doc xml:space="preserve">Generate a TOC select event with the given @uid. The purpose of the
TOC select event is to start playback based on the TOC's entry with the
given @uid.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="uid" transfer-ownership="none">
<doc xml:space="preserve">UID in the TOC to start playback from.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<method name="copy" c:identifier="gst_event_copy" introspectable="0">
<doc xml:space="preserve">Copy the event using the event specific copy function.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new event</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to copy</doc>
<type name="Event" c:type="const GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_segment" c:identifier="gst_event_copy_segment">
<doc xml:space="preserve">Parses a segment @event and copies the #GstSegment into the location
given by @segment.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to parse</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GstSegment</doc>
<type name="Segment" c:type="GstSegment*"/>
</parameter>
</parameters>
</method>
<method name="get_running_time_offset" c:identifier="gst_event_get_running_time_offset" version="1.4">
<doc xml:space="preserve">Retrieve the accumulated running time offset of the event.
Events passing through #GstPads that have a running time
offset set via gst_pad_set_offset() will get their offset
adjusted according to the pad's offset.
If the event contains any information that related to the
running time, this information will need to be updated
before usage with this offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The event's running time offset
MT safe.</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">A #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_seqnum" c:identifier="gst_event_get_seqnum">
<doc xml:space="preserve">Retrieve the sequence number of a event.
Events have ever-incrementing sequence numbers, which may also be set
explicitly via gst_event_set_seqnum(). Sequence numbers are typically used to
indicate that a event corresponds to some other set of events or messages,
for example an EOS event corresponding to a SEEK event. It is considered good
practice to make this correspondence when possible, though it is not
required.
Note that events and messages share the same sequence number incrementor;
two events or messages will never have the same sequence number unless
that correspondence was made explicitly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The event's sequence number.
MT safe.</doc>
<type name="guint32" c:type="guint32"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">A #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_structure" c:identifier="gst_event_get_structure">
<doc xml:space="preserve">Access the structure of the event.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The structure of the event. The
structure is still owned by the event, which means that you should not free
it and that the pointer becomes invalid when you free the event.
MT safe.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_name" c:identifier="gst_event_has_name">
<doc xml:space="preserve">Checks if @event has the given @name. This function is usually used to
check the name of a custom event.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @name matches the name of the event structure.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name to check</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="has_name_id" c:identifier="gst_event_has_name_id" version="1.18">
<doc xml:space="preserve">Checks if @event has the given @name. This function is usually used to
check the name of a custom event.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @name matches the name of the event structure.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name to check as a GQuark</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="parse_buffer_size" c:identifier="gst_event_parse_buffer_size">
<doc xml:space="preserve">Get the format, minsize, maxsize and async-flag in the buffersize event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to query</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the format in</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="minsize" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the minsize in</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="maxsize" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the maxsize in</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="async" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the async-flag in</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_caps" c:identifier="gst_event_parse_caps">
<doc xml:space="preserve">Get the caps from @event. The caps remains valid as long as @event remains
valid.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to parse</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="caps" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the caps</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
</parameters>
</method>
<method name="parse_flush_stop" c:identifier="gst_event_parse_flush_stop">
<doc xml:space="preserve">Parse the FLUSH_STOP event and retrieve the @reset_time member.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to parse</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="reset_time" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">if time should be reset</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_gap" c:identifier="gst_event_parse_gap">
<doc xml:space="preserve">Extract timestamp and duration from a new GAP event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a #GstEvent of type #GST_EVENT_GAP</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="timestamp" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location where to store the
start time (pts) of the gap, or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location where to store the duration of
the gap, or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_group_id" c:identifier="gst_event_parse_group_id" version="1.2">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if a group id was set on the event and could be parsed,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="group_id" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of variable where to store the group id</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_instant_rate_change" c:identifier="gst_event_parse_instant_rate_change" version="1.18">
<doc xml:space="preserve">Extract rate and flags from an instant-rate-change event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a #GstEvent of type #GST_EVENT_INSTANT_RATE_CHANGE</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="rate_multiplier" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location in which to store the rate
multiplier of the instant-rate-change event, or %NULL</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="new_flags" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location in which to store the new
segment flags of the instant-rate-change event, or %NULL</doc>
<type name="SegmentFlags" c:type="GstSegmentFlags*"/>
</parameter>
</parameters>
</method>
<method name="parse_instant_rate_sync_time" c:identifier="gst_event_parse_instant_rate_sync_time" version="1.18">
<doc xml:space="preserve">Extract the rate multiplier and running times from an instant-rate-sync-time event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a #GstEvent of type #GST_EVENT_INSTANT_RATE_CHANGE</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="rate_multiplier" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location where to store the rate of
the instant-rate-sync-time event, or %NULL</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location in which to store the running time
of the instant-rate-sync-time event, or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="upstream_running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location in which to store the
upstream running time of the instant-rate-sync-time event, or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_latency" c:identifier="gst_event_parse_latency">
<doc xml:space="preserve">Get the latency in the latency event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to query</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="latency" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the latency in.</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_protection" c:identifier="gst_event_parse_protection" version="1.6">
<doc xml:space="preserve">Parses an event containing protection system specific information and stores
the results in @system_id, @data and @origin. The data stored in @system_id,
@origin and @data are valid until @event is released.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a #GST_EVENT_PROTECTION event.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="system_id" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to store the UUID
string uniquely identifying a content protection system.</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
<parameter name="data" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to store a #GstBuffer
holding protection system specific information.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="origin" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to store a value that
indicates where the protection information carried by @event was extracted
from.</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_qos" c:identifier="gst_event_parse_qos">
<doc xml:space="preserve">Get the type, proportion, diff and timestamp in the qos event. See
gst_event_new_qos() for more information about the different QoS values.
@timestamp will be adjusted for any pad offsets of pads it was passing through.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to query</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="type" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the QoS type in</doc>
<type name="QOSType" c:type="GstQOSType*"/>
</parameter>
<parameter name="proportion" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the proportion in</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="diff" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the diff in</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff*"/>
</parameter>
<parameter name="timestamp" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to store the timestamp in</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_seek" c:identifier="gst_event_parse_seek">
<doc xml:space="preserve">Parses a seek @event and stores the results in the given result locations.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a seek event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="rate" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the rate</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the stream format</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="flags" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the #GstSeekFlags</doc>
<type name="SeekFlags" c:type="GstSeekFlags*"/>
</parameter>
<parameter name="start_type" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the #GstSeekType of the start position</doc>
<type name="SeekType" c:type="GstSeekType*"/>
</parameter>
<parameter name="start" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the start position expressed in @format</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="stop_type" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the #GstSeekType of the stop position</doc>
<type name="SeekType" c:type="GstSeekType*"/>
</parameter>
<parameter name="stop" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result location for the stop position expressed in @format</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_seek_trickmode_interval" c:identifier="gst_event_parse_seek_trickmode_interval" version="1.16">
<doc xml:space="preserve">Retrieve the trickmode interval that may have been set on a
seek event with gst_event_set_seek_trickmode_interval().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="interval" direction="out" caller-allocates="0" transfer-ownership="full">
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_segment" c:identifier="gst_event_parse_segment">
<doc xml:space="preserve">Parses a segment @event and stores the result in the given @segment location.
@segment remains valid only until the @event is freed. Don't modify the segment
and make a copy if you want to modify it or store it for later use.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to parse</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="segment" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GstSegment</doc>
<type name="Segment" c:type="const GstSegment**"/>
</parameter>
</parameters>
</method>
<method name="parse_segment_done" c:identifier="gst_event_parse_segment_done">
<doc xml:space="preserve">Extracts the position and format from the segment done message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstEvent of type GST_EVENT_SEGMENT_DONE.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the format, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="position" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the position, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_select_streams" c:identifier="gst_event_parse_select_streams" version="1.10">
<doc xml:space="preserve">Parse the SELECT_STREAMS event and retrieve the contained streams.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to parse</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="streams" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the streams</doc>
<type name="GLib.List" c:type="GList**">
<type name="utf8"/>
</type>
</parameter>
</parameters>
</method>
<method name="parse_sink_message" c:identifier="gst_event_parse_sink_message">
<doc xml:space="preserve">Parse the sink-message event. Unref @msg after usage.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to query</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="msg" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to store the #GstMessage in.</doc>
<type name="Message" c:type="GstMessage**"/>
</parameter>
</parameters>
</method>
<method name="parse_step" c:identifier="gst_event_parse_step">
<doc xml:space="preserve">Parse the step event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to query</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the format in</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="amount" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the amount in</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="rate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the rate in</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="flush" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the flush boolean in</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="intermediate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the intermediate
boolean in</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_stream" c:identifier="gst_event_parse_stream" version="1.10">
<doc xml:space="preserve">Parse a stream-start @event and extract the #GstStream from it.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="stream" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of variable to store the stream</doc>
<type name="Stream" c:type="GstStream**"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_collection" c:identifier="gst_event_parse_stream_collection" version="1.10">
<doc xml:space="preserve">Retrieve new #GstStreamCollection from STREAM_COLLECTION event @event.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-collection event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="collection" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to store the collection</doc>
<type name="StreamCollection" c:type="GstStreamCollection**"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_flags" c:identifier="gst_event_parse_stream_flags" version="1.2">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="flags" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of variable where to store the stream flags</doc>
<type name="StreamFlags" c:type="GstStreamFlags*"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_group_done" c:identifier="gst_event_parse_stream_group_done" version="1.10">
<doc xml:space="preserve">Parse a stream-group-done @event and store the result in the given
@group_id location.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-group-done event.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="group_id" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of variable to store the group id into</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_start" c:identifier="gst_event_parse_stream_start">
<doc xml:space="preserve">Parse a stream-id @event and store the result in the given @stream_id
location. The string stored in @stream_id must not be modified and will
remain valid only until @event gets freed. Make a copy if you want to
modify it or store it for later use.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="stream_id" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">pointer to store the stream-id</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_tag" c:identifier="gst_event_parse_tag">
<doc xml:space="preserve">Parses a tag @event and stores the results in the given @taglist location.
No reference to the taglist will be returned, it remains valid only until
the @event is freed. Don't modify or free the taglist, make a copy if you
want to modify it or store it for later use.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a tag event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="taglist" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">pointer to metadata list</doc>
<type name="TagList" c:type="GstTagList**"/>
</parameter>
</parameters>
</method>
<method name="parse_toc" c:identifier="gst_event_parse_toc">
<doc xml:space="preserve">Parse a TOC @event and store the results in the given @toc and @updated locations.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a TOC event.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="toc" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to #GstToc structure.</doc>
<type name="Toc" c:type="GstToc**"/>
</parameter>
<parameter name="updated" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to store TOC updated flag.</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_toc_select" c:identifier="gst_event_parse_toc_select">
<doc xml:space="preserve">Parse a TOC select @event and store the results in the given @uid location.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a TOC select event.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="uid" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">storage for the selection UID.</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_event_ref" introspectable="0">
<doc xml:space="preserve">Increase the refcount of this event.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@event (for convenience when doing assignments)</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The event to refcount</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_group_id" c:identifier="gst_event_set_group_id" version="1.2">
<doc xml:space="preserve">All streams that have the same group id are supposed to be played
together, i.e. all streams inside a container file should have the
same group id but different stream ids. The group id should change
each time the stream is started, resulting in different group ids
each time a file is played for example.
Use gst_util_group_id_next() to get a new group id.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="group_id" transfer-ownership="none">
<doc xml:space="preserve">the group id to set</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_running_time_offset" c:identifier="gst_event_set_running_time_offset" version="1.4">
<doc xml:space="preserve">Set the running time offset of a event. See
gst_event_get_running_time_offset() for more information.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">A #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">A the new running time offset</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_seek_trickmode_interval" c:identifier="gst_event_set_seek_trickmode_interval" version="1.16">
<doc xml:space="preserve">Sets a trickmode interval on a (writable) seek event. Elements
that support TRICKMODE_KEY_UNITS seeks SHOULD use this as the minimal
interval between each frame they may output.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="interval" transfer-ownership="none">
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_seqnum" c:identifier="gst_event_set_seqnum">
<doc xml:space="preserve">Set the sequence number of a event.
This function might be called by the creator of a event to indicate that the
event relates to other events or messages. See gst_event_get_seqnum() for
more information.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">A #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="seqnum" transfer-ownership="none">
<doc xml:space="preserve">A sequence number.</doc>
<type name="guint32" c:type="guint32"/>
</parameter>
</parameters>
</method>
<method name="set_stream" c:identifier="gst_event_set_stream" version="1.10">
<doc xml:space="preserve">Set the @stream on the stream-start @event</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">the stream object to set</doc>
<type name="Stream" c:type="GstStream*"/>
</parameter>
</parameters>
</method>
<method name="set_stream_flags" c:identifier="gst_event_set_stream_flags" version="1.2">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a stream-start event</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the stream flags to set</doc>
<type name="StreamFlags" c:type="GstStreamFlags"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_event_unref" introspectable="0">
<doc xml:space="preserve">Decrease the refcount of an event, freeing it if the refcount reaches 0.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the event to refcount</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<method name="writable_structure" c:identifier="gst_event_writable_structure">
<doc xml:space="preserve">Get a writable version of the structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The structure of the event. The structure
is still owned by the event, which means that you should not free
it and that the pointer becomes invalid when you free the event.
This function checks if @event is writable and will never return
%NULL.
MT safe.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">The #GstEvent.</doc>
<type name="Event" c:type="GstEvent*"/>
</instance-parameter>
</parameters>
</method>
<function name="replace" c:identifier="gst_event_replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
event is unreffed, the new one is reffed).
Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_event was different from @old_event</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be replaced.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
<parameter name="new_event" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstEvent that will
replace the event pointed to by @old_event.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</function>
<function name="steal" c:identifier="gst_event_steal" introspectable="0">
<doc xml:space="preserve">Atomically replace the #GstEvent pointed to by @old_event with %NULL and
return the original event.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent that was in @old_event</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be stolen.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
</parameters>
</function>
<function name="take" c:identifier="gst_event_take" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
function is similar to gst_event_replace() except that it takes ownership of
@new_event.
Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_event was different from @old_event</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be stolen.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
<parameter name="new_event" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstEvent that will
replace the event pointed to by @old_event.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</function>
</record>
<enumeration name="EventType" glib:type-name="GstEventType" glib:get-type="gst_event_type_get_type" c:type="GstEventType">
<doc xml:space="preserve">#GstEventType lists the standard event types that can be sent in a pipeline.
The custom event types can be used for private messages between elements
that can't be expressed using normal
GStreamer buffer passing semantics. Custom events carry an arbitrary
#GstStructure.
Specific custom events are distinguished by the name of the structure.</doc>
<member name="unknown" value="0" c:identifier="GST_EVENT_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">unknown event.</doc>
</member>
<member name="flush_start" value="2563" c:identifier="GST_EVENT_FLUSH_START" glib:nick="flush-start">
<doc xml:space="preserve">Start a flush operation. This event clears all data
from the pipeline and unblock all streaming threads.</doc>
</member>
<member name="flush_stop" value="5127" c:identifier="GST_EVENT_FLUSH_STOP" glib:nick="flush-stop">
<doc xml:space="preserve">Stop a flush operation. This event resets the
running-time of the pipeline.</doc>
</member>
<member name="stream_start" value="10254" c:identifier="GST_EVENT_STREAM_START" glib:nick="stream-start">
<doc xml:space="preserve">Event to mark the start of a new stream. Sent before any
other serialized event and only sent at the start of a new stream,
not after flushing seeks.</doc>
</member>
<member name="caps" value="12814" c:identifier="GST_EVENT_CAPS" glib:nick="caps">
<doc xml:space="preserve">#GstCaps event. Notify the pad of a new media type.</doc>
</member>
<member name="segment" value="17934" c:identifier="GST_EVENT_SEGMENT" glib:nick="segment">
<doc xml:space="preserve">A new media segment follows in the dataflow. The
segment events contains information for clipping buffers and
converting buffer timestamps to running-time and
stream-time.</doc>
</member>
<member name="stream_collection" value="19230" c:identifier="GST_EVENT_STREAM_COLLECTION" glib:nick="stream-collection">
<doc xml:space="preserve">A new #GstStreamCollection is available (Since: 1.10)</doc>
</member>
<member name="tag" value="20510" c:identifier="GST_EVENT_TAG" glib:nick="tag">
<doc xml:space="preserve">A new set of metadata tags has been found in the stream.</doc>
</member>
<member name="buffersize" value="23054" c:identifier="GST_EVENT_BUFFERSIZE" glib:nick="buffersize">
<doc xml:space="preserve">Notification of buffering requirements. Currently not
used yet.</doc>
</member>
<member name="sink_message" value="25630" c:identifier="GST_EVENT_SINK_MESSAGE" glib:nick="sink-message">
<doc xml:space="preserve">An event that sinks turn into a message. Used to
send messages that should be emitted in sync with
rendering.</doc>
</member>
<member name="stream_group_done" value="26894" c:identifier="GST_EVENT_STREAM_GROUP_DONE" glib:nick="stream-group-done">
<doc xml:space="preserve">Indicates that there is no more data for
the stream group ID in the message. Sent before EOS
in some instances and should be handled mostly the same. (Since: 1.10)</doc>
</member>
<member name="eos" value="28174" c:identifier="GST_EVENT_EOS" glib:nick="eos">
<doc xml:space="preserve">End-Of-Stream. No more data is to be expected to follow
without either a STREAM_START event, or a FLUSH_STOP and a SEGMENT
event.</doc>
</member>
<member name="toc" value="30750" c:identifier="GST_EVENT_TOC" glib:nick="toc">
<doc xml:space="preserve">An event which indicates that a new table of contents (TOC)
was found or updated.</doc>
</member>
<member name="protection" value="33310" c:identifier="GST_EVENT_PROTECTION" glib:nick="protection">
<doc xml:space="preserve">An event which indicates that new or updated
encryption information has been found in the stream.</doc>
</member>
<member name="segment_done" value="38406" c:identifier="GST_EVENT_SEGMENT_DONE" glib:nick="segment-done">
<doc xml:space="preserve">Marks the end of a segment playback.</doc>
</member>
<member name="gap" value="40966" c:identifier="GST_EVENT_GAP" glib:nick="gap">
<doc xml:space="preserve">Marks a gap in the datastream.</doc>
</member>
<member name="instant_rate_change" value="46090" c:identifier="GST_EVENT_INSTANT_RATE_CHANGE" glib:nick="instant-rate-change">
<doc xml:space="preserve">Notify downstream that a playback rate override
should be applied as soon as possible. (Since: 1.18)</doc>
</member>
<member name="qos" value="48641" c:identifier="GST_EVENT_QOS" glib:nick="qos">
<doc xml:space="preserve">A quality message. Used to indicate to upstream elements
that the downstream elements should adjust their processing
rate.</doc>
</member>
<member name="seek" value="51201" c:identifier="GST_EVENT_SEEK" glib:nick="seek">
<doc xml:space="preserve">A request for a new playback position and rate.</doc>
</member>
<member name="navigation" value="53761" c:identifier="GST_EVENT_NAVIGATION" glib:nick="navigation">
<doc xml:space="preserve">Navigation events are usually used for communicating
user requests, such as mouse or keyboard movements,
to upstream elements.</doc>
</member>
<member name="latency" value="56321" c:identifier="GST_EVENT_LATENCY" glib:nick="latency">
<doc xml:space="preserve">Notification of new latency adjustment. Sinks will use
the latency information to adjust their synchronisation.</doc>
</member>
<member name="step" value="58881" c:identifier="GST_EVENT_STEP" glib:nick="step">
<doc xml:space="preserve">A request for stepping through the media. Sinks will usually
execute the step operation.</doc>
</member>
<member name="reconfigure" value="61441" c:identifier="GST_EVENT_RECONFIGURE" glib:nick="reconfigure">
<doc xml:space="preserve">A request for upstream renegotiating caps and reconfiguring.</doc>
</member>
<member name="toc_select" value="64001" c:identifier="GST_EVENT_TOC_SELECT" glib:nick="toc-select">
<doc xml:space="preserve">A request for a new playback position based on TOC
entry's UID.</doc>
</member>
<member name="select_streams" value="66561" c:identifier="GST_EVENT_SELECT_STREAMS" glib:nick="select-streams">
<doc xml:space="preserve">A request to select one or more streams (Since: 1.10)</doc>
</member>
<member name="instant_rate_sync_time" value="66817" c:identifier="GST_EVENT_INSTANT_RATE_SYNC_TIME" glib:nick="instant-rate-sync-time">
<doc xml:space="preserve">Sent by the pipeline to notify elements that handle the
instant-rate-change event about the running-time when
the rate multiplier should be applied (or was applied). (Since: 1.18)</doc>
</member>
<member name="custom_upstream" value="69121" c:identifier="GST_EVENT_CUSTOM_UPSTREAM" glib:nick="custom-upstream">
<doc xml:space="preserve">Upstream custom event</doc>
</member>
<member name="custom_downstream" value="71686" c:identifier="GST_EVENT_CUSTOM_DOWNSTREAM" glib:nick="custom-downstream">
<doc xml:space="preserve">Downstream custom event that travels in the
data flow.</doc>
</member>
<member name="custom_downstream_oob" value="74242" c:identifier="GST_EVENT_CUSTOM_DOWNSTREAM_OOB" glib:nick="custom-downstream-oob">
<doc xml:space="preserve">Custom out-of-band downstream event.</doc>
</member>
<member name="custom_downstream_sticky" value="76830" c:identifier="GST_EVENT_CUSTOM_DOWNSTREAM_STICKY" glib:nick="custom-downstream-sticky">
<doc xml:space="preserve">Custom sticky downstream event.</doc>
</member>
<member name="custom_both" value="79367" c:identifier="GST_EVENT_CUSTOM_BOTH" glib:nick="custom-both">
<doc xml:space="preserve">Custom upstream or downstream event.
In-band when travelling downstream.</doc>
</member>
<member name="custom_both_oob" value="81923" c:identifier="GST_EVENT_CUSTOM_BOTH_OOB" glib:nick="custom-both-oob">
<doc xml:space="preserve">Custom upstream or downstream out-of-band event.</doc>
</member>
<function name="get_flags" c:identifier="gst_event_type_get_flags">
<doc xml:space="preserve">Gets the #GstEventTypeFlags associated with @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstEventTypeFlags.</doc>
<type name="EventTypeFlags" c:type="GstEventTypeFlags"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstEventType</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
<function name="get_name" c:identifier="gst_event_type_get_name">
<doc xml:space="preserve">Get a printable name for the given event type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the event.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the event type</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
<function name="to_quark" c:identifier="gst_event_type_to_quark">
<doc xml:space="preserve">Get the unique quark for the given event type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the event type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the event type</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
</enumeration>
<bitfield name="EventTypeFlags" glib:type-name="GstEventTypeFlags" glib:get-type="gst_event_type_flags_get_type" c:type="GstEventTypeFlags">
<doc xml:space="preserve">#GstEventTypeFlags indicate the aspects of the different #GstEventType
values. You can get the type flags of a #GstEventType with the
gst_event_type_get_flags() function.</doc>
<member name="upstream" value="1" c:identifier="GST_EVENT_TYPE_UPSTREAM" glib:nick="upstream">
<doc xml:space="preserve">Set if the event can travel upstream.</doc>
</member>
<member name="downstream" value="2" c:identifier="GST_EVENT_TYPE_DOWNSTREAM" glib:nick="downstream">
<doc xml:space="preserve">Set if the event can travel downstream.</doc>
</member>
<member name="serialized" value="4" c:identifier="GST_EVENT_TYPE_SERIALIZED" glib:nick="serialized">
<doc xml:space="preserve">Set if the event should be serialized with data
flow.</doc>
</member>
<member name="sticky" value="8" c:identifier="GST_EVENT_TYPE_STICKY" glib:nick="sticky">
<doc xml:space="preserve">Set if the event is sticky on the pads.</doc>
</member>
<member name="sticky_multi" value="16" c:identifier="GST_EVENT_TYPE_STICKY_MULTI" glib:nick="sticky-multi">
<doc xml:space="preserve">Multiple sticky events can be on a pad, each
identified by the event name.</doc>
</member>
</bitfield>
<constant name="FLAG_SET_MASK_EXACT" value="4294967295" c:type="GST_FLAG_SET_MASK_EXACT" version="1.6">
<doc xml:space="preserve">A mask value with all bits set, for use as a
GstFlagSet mask where all flag bits must match
exactly</doc>
<type name="guint" c:type="guint"/>
</constant>
<constant name="FORMAT_PERCENT_MAX" value="1000000" c:type="GST_FORMAT_PERCENT_MAX">
<doc xml:space="preserve">The PERCENT format is between 0 and this value</doc>
<type name="gint64" c:type="gint64"/>
</constant>
<constant name="FORMAT_PERCENT_SCALE" value="10000" c:type="GST_FORMAT_PERCENT_SCALE">
<doc xml:space="preserve">The value used to scale down the reported PERCENT format value to
its real value.</doc>
<type name="gint64" c:type="gint64"/>
</constant>
<function-macro name="FOURCC_ARGS" c:identifier="GST_FOURCC_ARGS" introspectable="0">
<doc xml:space="preserve">Can be used together with #GST_FOURCC_FORMAT to properly output a
#guint32 fourcc value in a printf\()-style text message.</doc>
<parameters>
<parameter name="fourcc">
<doc xml:space="preserve">a #guint32 fourcc value to output</doc>
</parameter>
</parameters>
</function-macro>
<constant name="FOURCC_FORMAT" value="c%c%c%c" c:type="GST_FOURCC_FORMAT" introspectable="0">
<doc xml:space="preserve">Can be used together with #GST_FOURCC_ARGS to properly output a
#guint32 fourcc value in a printf\()-style text message.
|[
printf ("fourcc: %" GST_FOURCC_FORMAT "\n", GST_FOURCC_ARGS (fcc));
]|</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<class name="FlagSet" c:symbol-prefix="flagset" glib:type-name="GstFlagSet" glib:get-type="gst_flagset_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a 32-bit flag bitfield, with 32-bit
mask indicating which of the bits in the field are explicitly set.</doc>
<function name="register" c:identifier="gst_flagset_register" version="1.6">
<doc xml:space="preserve">Create a new sub-class of #GST_TYPE_FLAG_SET
which will pretty-print the human-readable flags
when serializing, for easier debugging.</doc>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<parameter name="flags_type" transfer-ownership="none">
<doc xml:space="preserve">a #GType of a #G_TYPE_FLAGS type.</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
</class>
<enumeration name="FlowReturn" glib:type-name="GstFlowReturn" glib:get-type="gst_flow_return_get_type" c:type="GstFlowReturn">
<doc xml:space="preserve">The result of passing data to a pad.
Note that the custom return values should not be exposed outside of the
element scope.</doc>
<member name="custom_success_2" value="102" c:identifier="GST_FLOW_CUSTOM_SUCCESS_2" glib:nick="custom-success-2">
<doc xml:space="preserve">Pre-defined custom success code.</doc>
</member>
<member name="custom_success_1" value="101" c:identifier="GST_FLOW_CUSTOM_SUCCESS_1" glib:nick="custom-success-1">
<doc xml:space="preserve">Pre-defined custom success code (define your
custom success code to this to avoid compiler
warnings).</doc>
</member>
<member name="custom_success" value="100" c:identifier="GST_FLOW_CUSTOM_SUCCESS" glib:nick="custom-success">
<doc xml:space="preserve">Elements can use values starting from
this (and higher) to define custom success
codes.</doc>
</member>
<member name="ok" value="0" c:identifier="GST_FLOW_OK" glib:nick="ok">
<doc xml:space="preserve">Data passing was ok.</doc>
</member>
<member name="not_linked" value="-1" c:identifier="GST_FLOW_NOT_LINKED" glib:nick="not-linked">
<doc xml:space="preserve">Pad is not linked.</doc>
</member>
<member name="flushing" value="-2" c:identifier="GST_FLOW_FLUSHING" glib:nick="flushing">
<doc xml:space="preserve">Pad is flushing.</doc>
</member>
<member name="eos" value="-3" c:identifier="GST_FLOW_EOS" glib:nick="eos">
<doc xml:space="preserve">Pad is EOS.</doc>
</member>
<member name="not_negotiated" value="-4" c:identifier="GST_FLOW_NOT_NEGOTIATED" glib:nick="not-negotiated">
<doc xml:space="preserve">Pad is not negotiated.</doc>
</member>
<member name="error" value="-5" c:identifier="GST_FLOW_ERROR" glib:nick="error">
<doc xml:space="preserve">Some (fatal) error occurred. Element generating
this error should post an error message using
GST_ELEMENT_ERROR() with more details.</doc>
</member>
<member name="not_supported" value="-6" c:identifier="GST_FLOW_NOT_SUPPORTED" glib:nick="not-supported">
<doc xml:space="preserve">This operation is not supported.</doc>
</member>
<member name="custom_error" value="-100" c:identifier="GST_FLOW_CUSTOM_ERROR" glib:nick="custom-error">
<doc xml:space="preserve">Elements can use values starting from
this (and lower) to define custom error codes.</doc>
</member>
<member name="custom_error_1" value="-101" c:identifier="GST_FLOW_CUSTOM_ERROR_1" glib:nick="custom-error-1">
<doc xml:space="preserve">Pre-defined custom error code (define your
custom error code to this to avoid compiler
warnings).</doc>
</member>
<member name="custom_error_2" value="-102" c:identifier="GST_FLOW_CUSTOM_ERROR_2" glib:nick="custom-error-2">
<doc xml:space="preserve">Pre-defined custom error code.</doc>
</member>
</enumeration>
<enumeration name="Format" glib:type-name="GstFormat" glib:get-type="gst_format_get_type" c:type="GstFormat">
<doc xml:space="preserve">Standard predefined formats</doc>
<member name="undefined" value="0" c:identifier="GST_FORMAT_UNDEFINED" glib:nick="undefined">
<doc xml:space="preserve">undefined format</doc>
</member>
<member name="default" value="1" c:identifier="GST_FORMAT_DEFAULT" glib:nick="default">
<doc xml:space="preserve">the default format of the pad/element. This can be
samples for raw audio, frames/fields for raw video (some, but not all,
elements support this; use @GST_FORMAT_TIME if you don't have a good
reason to query for samples/frames)</doc>
</member>
<member name="bytes" value="2" c:identifier="GST_FORMAT_BYTES" glib:nick="bytes">
<doc xml:space="preserve">bytes</doc>
</member>
<member name="time" value="3" c:identifier="GST_FORMAT_TIME" glib:nick="time">
<doc xml:space="preserve">time in nanoseconds</doc>
</member>
<member name="buffers" value="4" c:identifier="GST_FORMAT_BUFFERS" glib:nick="buffers">
<doc xml:space="preserve">buffers (few, if any, elements implement this as of
May 2009)</doc>
</member>
<member name="percent" value="5" c:identifier="GST_FORMAT_PERCENT" glib:nick="percent">
<doc xml:space="preserve">percentage of stream (few, if any, elements implement
this as of May 2009)</doc>
</member>
<function name="get_by_nick" c:identifier="gst_format_get_by_nick">
<doc xml:space="preserve">Return the format registered with the given nick.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The format with @nick or GST_FORMAT_UNDEFINED
if the format was not registered.</doc>
<type name="Format" c:type="GstFormat"/>
</return-value>
<parameters>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">The nick of the format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="get_details" c:identifier="gst_format_get_details">
<doc xml:space="preserve">Get details about the given format.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstFormatDefinition for @format or %NULL
on failure.
MT safe.</doc>
<type name="FormatDefinition" c:type="const GstFormatDefinition*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format to get details of</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function name="get_name" c:identifier="gst_format_get_name">
<doc xml:space="preserve">Get a printable name for the given format. Do not modify or free.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a reference to the static name of the format
or %NULL if the format is unknown.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function name="iterate_definitions" c:identifier="gst_format_iterate_definitions">
<doc xml:space="preserve">Iterate all the registered formats. The format definition is read
only.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a GstIterator of #GstFormatDefinition.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
</function>
<function name="register" c:identifier="gst_format_register">
<doc xml:space="preserve">Create a new GstFormat based on the nick or return an
already registered format with that nick.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A new GstFormat or an already registered format
with the same nick.
MT safe.</doc>
<type name="Format" c:type="GstFormat"/>
</return-value>
<parameters>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">The nick of the new format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">The description of the new format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="to_quark" c:identifier="gst_format_to_quark">
<doc xml:space="preserve">Get the unique quark for the given format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the format or 0 if the format
is unknown.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
</enumeration>
<record name="FormatDefinition" c:type="GstFormatDefinition">
<doc xml:space="preserve">A format definition</doc>
<field name="value" writable="1">
<doc xml:space="preserve">The unique id of this format</doc>
<type name="Format" c:type="GstFormat"/>
</field>
<field name="nick" writable="1">
<doc xml:space="preserve">A short nick of the format</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="description" writable="1">
<doc xml:space="preserve">A longer description of the format</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="quark" writable="1">
<doc xml:space="preserve">A quark for the nick</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</field>
</record>
<class name="Fraction" c:symbol-prefix="fraction" glib:type-name="GstFraction" glib:get-type="gst_fraction_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a fraction of an integer numerator
over an integer denominator</doc>
</class>
<class name="FractionRange" c:symbol-prefix="fraction_range" glib:type-name="GstFractionRange" glib:get-type="gst_fraction_range_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #GstFractionRange range</doc>
</class>
<function-macro name="GHOST_PAD" c:identifier="GST_GHOST_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="GHOST_PAD_CAST" c:identifier="GST_GHOST_PAD_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="GHOST_PAD_CLASS" c:identifier="GST_GHOST_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<constant name="GROUP_ID_INVALID" value="0" c:type="GST_GROUP_ID_INVALID" version="1.14">
<doc xml:space="preserve">A value which is guaranteed to never be returned by
gst_util_group_id_next().
Can be used as a default value in variables used to store group_id.</doc>
<type name="gint" c:type="gint"/>
</constant>
<class name="GhostPad" c:symbol-prefix="ghost_pad" c:type="GstGhostPad" parent="ProxyPad" glib:type-name="GstGhostPad" glib:get-type="gst_ghost_pad_get_type" glib:type-struct="GhostPadClass">
<doc xml:space="preserve">GhostPads are useful when organizing pipelines with #GstBin like elements.
The idea here is to create hierarchical element graphs. The bin element
contains a sub-graph. Now one would like to treat the bin-element like any
other #GstElement. This is where GhostPads come into play. A GhostPad acts as
a proxy for another pad. Thus the bin can have sink and source ghost-pads
that are associated with sink and source pads of the child elements.
If the target pad is known at creation time, gst_ghost_pad_new() is the
function to use to get a ghost-pad. Otherwise one can use gst_ghost_pad_new_no_target()
to create the ghost-pad and use gst_ghost_pad_set_target() to establish the
association later on.
Note that GhostPads add overhead to the data processing of a pipeline.</doc>
<constructor name="new" c:identifier="gst_ghost_pad_new">
<doc xml:space="preserve">Create a new ghostpad with @target as the target. The direction will be taken
from the target pad. @target must be unlinked.
Will ref the target.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPad, or %NULL in
case of an error.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new pad, or %NULL to assign a default name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the pad to ghost.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_template" c:identifier="gst_ghost_pad_new_from_template">
<doc xml:space="preserve">Create a new ghostpad with @target as the target. The direction will be taken
from the target pad. The template used on the ghostpad will be @template.
Will ref the target.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPad, or %NULL in
case of an error.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new pad, or %NULL to assign a default name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the pad to ghost.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadTemplate to use on the ghostpad.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_no_target" c:identifier="gst_ghost_pad_new_no_target">
<doc xml:space="preserve">Create a new ghostpad without a target with the given direction.
A target can be set on the ghostpad later with the
gst_ghost_pad_set_target() function.
The created ghostpad will not have a padtemplate.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPad, or %NULL in
case of an error.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new pad, or %NULL to assign a default name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="dir" transfer-ownership="none">
<doc xml:space="preserve">the direction of the ghostpad</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_no_target_from_template" c:identifier="gst_ghost_pad_new_no_target_from_template">
<doc xml:space="preserve">Create a new ghostpad based on @templ, without setting a target. The
direction will be taken from the @templ.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPad, or %NULL in
case of an error.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new pad, or %NULL to assign a default name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadTemplate to create the ghostpad from.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
</parameters>
</constructor>
<function name="activate_mode_default" c:identifier="gst_ghost_pad_activate_mode_default">
<doc xml:space="preserve">Invoke the default activate mode function of a ghost pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the operation was successful.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to activate or deactivate.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the requested activation mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">whether the pad should be active or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="internal_activate_mode_default" c:identifier="gst_ghost_pad_internal_activate_mode_default">
<doc xml:space="preserve">Invoke the default activate mode function of a proxy pad that is
owned by a ghost pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the operation was successful.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to activate or deactivate.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the requested activation mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">whether the pad should be active or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<method name="construct" c:identifier="gst_ghost_pad_construct" deprecated="1">
<doc xml:space="preserve">Finish initialization of a newly allocated ghost pad.
This function is most useful in language bindings and when subclassing
#GstGhostPad; plugin and application developers normally will not call this
function. Call this function directly after a call to g_object_new
(GST_TYPE_GHOST_PAD, "direction", @dir, ..., NULL).</doc>
<doc-deprecated xml:space="preserve">This function is deprecated since 1.18 and does nothing
anymore.</doc-deprecated>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the construction succeeds, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="gpad" transfer-ownership="none">
<doc xml:space="preserve">the newly allocated ghost pad</doc>
<type name="GhostPad" c:type="GstGhostPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_target" c:identifier="gst_ghost_pad_get_target">
<doc xml:space="preserve">Get the target pad of @gpad. Unref target pad after usage.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the target #GstPad, can be
%NULL if the ghostpad has no target set. Unref target pad after
usage.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="gpad" transfer-ownership="none">
<doc xml:space="preserve">the #GstGhostPad</doc>
<type name="GhostPad" c:type="GstGhostPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_target" c:identifier="gst_ghost_pad_set_target">
<doc xml:space="preserve">Set the new target of the ghostpad @gpad. Any existing target
is unlinked and links to the new target are established. if @newtarget is
%NULL the target will be cleared.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the new target could be set. This function
can return %FALSE when the internal pads could not be linked.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="gpad" transfer-ownership="none">
<doc xml:space="preserve">the #GstGhostPad</doc>
<type name="GhostPad" c:type="GstGhostPad*"/>
</instance-parameter>
<parameter name="newtarget" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the new pad target</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<field name="pad">
<type name="ProxyPad" c:type="GstProxyPad"/>
</field>
<field name="priv" readable="0" private="1">
<type name="GhostPadPrivate" c:type="GstGhostPadPrivate*"/>
</field>
</class>
<record name="GhostPadClass" c:type="GstGhostPadClass" glib:is-gtype-struct-for="GhostPad">
<field name="parent_class">
<type name="ProxyPadClass" c:type="GstProxyPadClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="GhostPadPrivate" c:type="GstGhostPadPrivate" disguised="1"/>
<function-macro name="IS_ALLOCATOR" c:identifier="GST_IS_ALLOCATOR" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_ALLOCATOR_CLASS" c:identifier="GST_IS_ALLOCATOR_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BIN" c:identifier="GST_IS_BIN" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BIN_CLASS" c:identifier="GST_IS_BIN_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUFFER" c:identifier="GST_IS_BUFFER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUFFER_LIST" c:identifier="GST_IS_BUFFER_LIST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUFFER_POOL" c:identifier="GST_IS_BUFFER_POOL" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUFFER_POOL_CLASS" c:identifier="GST_IS_BUFFER_POOL_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUS" c:identifier="GST_IS_BUS" introspectable="0">
<parameters>
<parameter name="bus">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_BUS_CLASS" c:identifier="GST_IS_BUS_CLASS" introspectable="0">
<parameters>
<parameter name="bclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CAPS" c:identifier="GST_IS_CAPS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CAPS_FEATURES" c:identifier="GST_IS_CAPS_FEATURES" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CHILD_PROXY" c:identifier="GST_IS_CHILD_PROXY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CLOCK" c:identifier="GST_IS_CLOCK" introspectable="0">
<parameters>
<parameter name="clock">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CLOCK_CLASS" c:identifier="GST_IS_CLOCK_CLASS" introspectable="0">
<parameters>
<parameter name="cclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CONTEXT" c:identifier="GST_IS_CONTEXT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CONTROL_BINDING" c:identifier="GST_IS_CONTROL_BINDING" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CONTROL_BINDING_CLASS" c:identifier="GST_IS_CONTROL_BINDING_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CONTROL_SOURCE" c:identifier="GST_IS_CONTROL_SOURCE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_CONTROL_SOURCE_CLASS" c:identifier="GST_IS_CONTROL_SOURCE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE" c:identifier="GST_IS_DEVICE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_CLASS" c:identifier="GST_IS_DEVICE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_MONITOR" c:identifier="GST_IS_DEVICE_MONITOR" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_MONITOR_CLASS" c:identifier="GST_IS_DEVICE_MONITOR_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_PROVIDER" c:identifier="GST_IS_DEVICE_PROVIDER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_PROVIDER_CLASS" c:identifier="GST_IS_DEVICE_PROVIDER_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_PROVIDER_FACTORY" c:identifier="GST_IS_DEVICE_PROVIDER_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DEVICE_PROVIDER_FACTORY_CLASS" c:identifier="GST_IS_DEVICE_PROVIDER_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DYNAMIC_TYPE_FACTORY" c:identifier="GST_IS_DYNAMIC_TYPE_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_DYNAMIC_TYPE_FACTORY_CLASS" c:identifier="GST_IS_DYNAMIC_TYPE_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_ELEMENT" c:identifier="GST_IS_ELEMENT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_ELEMENT_CLASS" c:identifier="GST_IS_ELEMENT_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_ELEMENT_FACTORY" c:identifier="GST_IS_ELEMENT_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_ELEMENT_FACTORY_CLASS" c:identifier="GST_IS_ELEMENT_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_EVENT" c:identifier="GST_IS_EVENT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_GHOST_PAD" c:identifier="GST_IS_GHOST_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_GHOST_PAD_CLASS" c:identifier="GST_IS_GHOST_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_MESSAGE" c:identifier="GST_IS_MESSAGE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_MINI_OBJECT_TYPE" c:identifier="GST_IS_MINI_OBJECT_TYPE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
<parameter name="type">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_OBJECT" c:identifier="GST_IS_OBJECT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_OBJECT_CLASS" c:identifier="GST_IS_OBJECT_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PAD" c:identifier="GST_IS_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PAD_CLASS" c:identifier="GST_IS_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PAD_TEMPLATE" c:identifier="GST_IS_PAD_TEMPLATE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PAD_TEMPLATE_CLASS" c:identifier="GST_IS_PAD_TEMPLATE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PARAM_SPEC_ARRAY_LIST" c:identifier="GST_IS_PARAM_SPEC_ARRAY_LIST" introspectable="0">
<parameters>
<parameter name="pspec">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PARAM_SPEC_FRACTION" c:identifier="GST_IS_PARAM_SPEC_FRACTION" introspectable="0">
<parameters>
<parameter name="pspec">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PIPELINE" c:identifier="GST_IS_PIPELINE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PIPELINE_CLASS" c:identifier="GST_IS_PIPELINE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PLUGIN" c:identifier="GST_IS_PLUGIN" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PLUGIN_CLASS" c:identifier="GST_IS_PLUGIN_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PLUGIN_FEATURE" c:identifier="GST_IS_PLUGIN_FEATURE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PLUGIN_FEATURE_CLASS" c:identifier="GST_IS_PLUGIN_FEATURE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PRESET" c:identifier="GST_IS_PRESET" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PROXY_PAD" c:identifier="GST_IS_PROXY_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_PROXY_PAD_CLASS" c:identifier="GST_IS_PROXY_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_QUERY" c:identifier="GST_IS_QUERY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_REGISTRY" c:identifier="GST_IS_REGISTRY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_REGISTRY_CLASS" c:identifier="GST_IS_REGISTRY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_SAMPLE" c:identifier="GST_IS_SAMPLE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_STREAM" c:identifier="GST_IS_STREAM" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_STREAM_CLASS" c:identifier="GST_IS_STREAM_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_STREAM_COLLECTION" c:identifier="GST_IS_STREAM_COLLECTION" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_STREAM_COLLECTION_CLASS" c:identifier="GST_IS_STREAM_COLLECTION_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_STRUCTURE" c:identifier="GST_IS_STRUCTURE" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_SYSTEM_CLOCK" c:identifier="GST_IS_SYSTEM_CLOCK" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_SYSTEM_CLOCK_CLASS" c:identifier="GST_IS_SYSTEM_CLOCK_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TAG_LIST" c:identifier="GST_IS_TAG_LIST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TAG_SETTER" c:identifier="GST_IS_TAG_SETTER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TASK" c:identifier="GST_IS_TASK" introspectable="0">
<parameters>
<parameter name="task">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TASK_CLASS" c:identifier="GST_IS_TASK_CLASS" introspectable="0">
<parameters>
<parameter name="tclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TASK_POOL" c:identifier="GST_IS_TASK_POOL" introspectable="0">
<parameters>
<parameter name="pool">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TASK_POOL_CLASS" c:identifier="GST_IS_TASK_POOL_CLASS" introspectable="0">
<parameters>
<parameter name="pclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TOC_SETTER" c:identifier="GST_IS_TOC_SETTER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER" c:identifier="GST_IS_TRACER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER_CLASS" c:identifier="GST_IS_TRACER_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER_FACTORY" c:identifier="GST_IS_TRACER_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER_FACTORY_CLASS" c:identifier="GST_IS_TRACER_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER_RECORD" c:identifier="GST_IS_TRACER_RECORD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TRACER_RECORD_CLASS" c:identifier="GST_IS_TRACER_RECORD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TYPE_FIND_FACTORY" c:identifier="GST_IS_TYPE_FIND_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_TYPE_FIND_FACTORY_CLASS" c:identifier="GST_IS_TYPE_FIND_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_URI" c:identifier="GST_IS_URI" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="IS_URI_HANDLER" c:identifier="GST_IS_URI_HANDLER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ITERATOR" c:identifier="GST_ITERATOR" introspectable="0">
<doc xml:space="preserve">Macro to cast to a #GstIterator</doc>
<parameters>
<parameter name="it">
<doc xml:space="preserve">the #GstIterator value</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ITERATOR_COOKIE" c:identifier="GST_ITERATOR_COOKIE" introspectable="0">
<doc xml:space="preserve">Macro to get the cookie of a #GstIterator. The cookie of the
iterator is the value of the master cookie when the iterator
was created.
Whenever the iterator is iterated, the value is compared to the
value of the master cookie. If they are different, a concurrent
modification happened to the iterator and a resync is needed.</doc>
<parameters>
<parameter name="it">
<doc xml:space="preserve">the #GstIterator to get the cookie of</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ITERATOR_LOCK" c:identifier="GST_ITERATOR_LOCK" introspectable="0">
<doc xml:space="preserve">Macro to get the lock protecting the datastructure being iterated.</doc>
<parameters>
<parameter name="it">
<doc xml:space="preserve">the #GstIterator to get the lock of</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ITERATOR_ORIG_COOKIE" c:identifier="GST_ITERATOR_ORIG_COOKIE" introspectable="0">
<doc xml:space="preserve">Macro to get a pointer to where the master cookie is stored. The
master cookie protects the structure being iterated and gets updated
whenever the datastructure changes.</doc>
<parameters>
<parameter name="it">
<doc xml:space="preserve">the #GstIterator to get the master cookie of</doc>
</parameter>
</parameters>
</function-macro>
<class name="Int64Range" c:symbol-prefix="int64_range" glib:type-name="GstInt64Range" glib:get-type="gst_int64_range_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #gint64 range</doc>
</class>
<class name="IntRange" c:symbol-prefix="int_range" glib:type-name="GstIntRange" glib:get-type="gst_int_range_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #gint range</doc>
</class>
<record name="Iterator" c:type="GstIterator" glib:type-name="GstIterator" glib:get-type="gst_iterator_get_type" c:symbol-prefix="iterator">
<doc xml:space="preserve">A GstIterator is used to retrieve multiple objects from another object in
a threadsafe way.
Various GStreamer objects provide access to their internal structures using
an iterator.
Note that if calling a GstIterator function results in your code receiving
a refcounted object (with, say, g_value_get_object()), the refcount for that
object will not be increased. Your code is responsible for taking a reference
if it wants to continue using it later.
The basic use pattern of an iterator is as follows:
|[&lt;!-- language="C" --&gt;
GstIterator *it = _get_iterator(object);
GValue item = G_VALUE_INIT;
done = FALSE;
while (!done) {
switch (gst_iterator_next (it, &amp;amp;item)) {
case GST_ITERATOR_OK:
...get/use/change item here...
g_value_reset (&amp;amp;item);
break;
case GST_ITERATOR_RESYNC:
...rollback changes to items...
gst_iterator_resync (it);
break;
case GST_ITERATOR_ERROR:
...wrong parameters were given...
done = TRUE;
break;
case GST_ITERATOR_DONE:
done = TRUE;
break;
}
}
g_value_unset (&amp;amp;item);
gst_iterator_free (it);
]|</doc>
<field name="copy" writable="1">
<doc xml:space="preserve">The function to copy the iterator</doc>
<type name="IteratorCopyFunction" c:type="GstIteratorCopyFunction"/>
</field>
<field name="next" writable="1">
<doc xml:space="preserve">The function to get the next item in the iterator</doc>
<type name="IteratorNextFunction" c:type="GstIteratorNextFunction"/>
</field>
<field name="item" writable="1">
<doc xml:space="preserve">The function to be called for each item retrieved</doc>
<type name="IteratorItemFunction" c:type="GstIteratorItemFunction"/>
</field>
<field name="resync" writable="1">
<doc xml:space="preserve">The function to call when a resync is needed.</doc>
<type name="IteratorResyncFunction" c:type="GstIteratorResyncFunction"/>
</field>
<field name="free" writable="1">
<doc xml:space="preserve">The function to call when the iterator is freed</doc>
<type name="IteratorFreeFunction" c:type="GstIteratorFreeFunction"/>
</field>
<field name="pushed" writable="1">
<doc xml:space="preserve">The iterator that is currently pushed with gst_iterator_push()</doc>
<type name="Iterator" c:type="GstIterator*"/>
</field>
<field name="type" writable="1">
<doc xml:space="preserve">The type of the object that this iterator will return</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="lock" writable="1">
<doc xml:space="preserve">The lock protecting the data structure and the cookie.</doc>
<type name="GLib.Mutex" c:type="GMutex*"/>
</field>
<field name="cookie" writable="1">
<doc xml:space="preserve">The cookie; the value of the master_cookie when this iterator was
created.</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="master_cookie" writable="1">
<doc xml:space="preserve">A pointer to the master cookie.</doc>
<type name="guint32" c:type="guint32*"/>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">the size of the iterator</doc>
<type name="guint" c:type="guint"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<constructor name="new" c:identifier="gst_iterator_new" introspectable="0">
<doc xml:space="preserve">Create a new iterator. This function is mainly used for objects
implementing the next/resync/free function to iterate a data structure.
For each item retrieved, the @item function is called with the lock
held. The @free function is called when the iterator is freed.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstIterator.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of the iterator structure</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">#GType of children</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="lock" transfer-ownership="none">
<doc xml:space="preserve">pointer to a #GMutex.</doc>
<type name="GLib.Mutex" c:type="GMutex*"/>
</parameter>
<parameter name="master_cookie" transfer-ownership="none">
<doc xml:space="preserve">pointer to a guint32 that is changed when the items in the
iterator changed.</doc>
<type name="guint32" c:type="guint32*"/>
</parameter>
<parameter name="copy" transfer-ownership="none">
<doc xml:space="preserve">copy function</doc>
<type name="IteratorCopyFunction" c:type="GstIteratorCopyFunction"/>
</parameter>
<parameter name="next" transfer-ownership="none">
<doc xml:space="preserve">function to get next item</doc>
<type name="IteratorNextFunction" c:type="GstIteratorNextFunction"/>
</parameter>
<parameter name="item" transfer-ownership="none">
<doc xml:space="preserve">function to call on each item retrieved</doc>
<type name="IteratorItemFunction" c:type="GstIteratorItemFunction"/>
</parameter>
<parameter name="resync" transfer-ownership="none">
<doc xml:space="preserve">function to resync the iterator</doc>
<type name="IteratorResyncFunction" c:type="GstIteratorResyncFunction"/>
</parameter>
<parameter name="free" transfer-ownership="none">
<doc xml:space="preserve">function to free the iterator</doc>
<type name="IteratorFreeFunction" c:type="GstIteratorFreeFunction"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_list" c:identifier="gst_iterator_new_list" introspectable="0">
<doc xml:space="preserve">Create a new iterator designed for iterating @list.
The list you iterate is usually part of a data structure @owner and is
protected with @lock.
The iterator will use @lock to retrieve the next item of the list and it
will then call the @item function before releasing @lock again.
When a concurrent update to the list is performed, usually by @owner while
holding @lock, @master_cookie will be updated. The iterator implementation
will notice the update of the cookie and will return %GST_ITERATOR_RESYNC to
the user of the iterator in the next call to gst_iterator_next().</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstIterator for @list.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">#GType of elements</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="lock" transfer-ownership="none">
<doc xml:space="preserve">pointer to a #GMutex protecting the list.</doc>
<type name="GLib.Mutex" c:type="GMutex*"/>
</parameter>
<parameter name="master_cookie" transfer-ownership="none">
<doc xml:space="preserve">pointer to a guint32 that is incremented when the list
is changed.</doc>
<type name="guint32" c:type="guint32*"/>
</parameter>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">pointer to the list</doc>
<type name="GLib.List" c:type="GList**">
<type name="gpointer" c:type="gpointer"/>
</type>
</parameter>
<parameter name="owner" transfer-ownership="none">
<doc xml:space="preserve">object owning the list</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="item" transfer-ownership="none">
<doc xml:space="preserve">function to call on each item retrieved</doc>
<type name="IteratorItemFunction" c:type="GstIteratorItemFunction"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_single" c:identifier="gst_iterator_new_single">
<doc xml:space="preserve">This #GstIterator is a convenient iterator for the common
case where a #GstIterator needs to be returned but only
a single object has to be considered. This happens often
for the #GstPadIterIntLinkFunction.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstIterator for @object.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">#GType of the passed object</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">object that this iterator should return</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</constructor>
<method name="copy" c:identifier="gst_iterator_copy">
<doc xml:space="preserve">Copy the iterator and its state.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @it.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">a #GstIterator</doc>
<type name="Iterator" c:type="const GstIterator*"/>
</instance-parameter>
</parameters>
</method>
<method name="filter" c:identifier="gst_iterator_filter">
<doc xml:space="preserve">Create a new iterator from an existing iterator. The new iterator
will only return those elements that match the given compare function @func.
The first parameter that is passed to @func is the #GValue of the current
iterator element and the second parameter is @user_data. @func should
return 0 for elements that should be included in the filtered iterator.
When this iterator is freed, @it will also be freed.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstIterator.
MT safe.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to filter</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call">
<doc xml:space="preserve">the compare function to select elements</doc>
<type name="GLib.CompareFunc" c:type="GCompareFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none">
<doc xml:space="preserve">user data passed to the compare function</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="find_custom" c:identifier="gst_iterator_find_custom">
<doc xml:space="preserve">Find the first element in @it that matches the compare function @func.
@func should return 0 when the element is found. The first parameter
to @func will be the current element of the iterator and the
second parameter will be @user_data.
The result will be stored in @elem if a result is found.
The iterator will not be freed.
This function will return %FALSE if an error happened to the iterator
or if the element wasn't found.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Returns %TRUE if the element was found, else %FALSE.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to iterate</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="2">
<doc xml:space="preserve">the compare function to use</doc>
<type name="GLib.CompareFunc" c:type="GCompareFunc"/>
</parameter>
<parameter name="elem" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">pointer to a #GValue where to store the result</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the compare function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="fold" c:identifier="gst_iterator_fold">
<doc xml:space="preserve">Folds @func over the elements of @iter. That is to say, @func will be called
as @func (object, @ret, @user_data) for each object in @it. The normal use
of this procedure is to accumulate the results of operating on the objects in
@ret.
This procedure can be used (and is used internally) to implement the
gst_iterator_foreach() and gst_iterator_find_custom() operations.
The fold will proceed as long as @func returns %TRUE. When the iterator has no
more arguments, %GST_ITERATOR_DONE will be returned. If @func returns %FALSE,
the fold will stop, and %GST_ITERATOR_OK will be returned. Errors or resyncs
will cause fold to return %GST_ITERATOR_ERROR or %GST_ITERATOR_RESYNC as
appropriate.
The iterator will not be freed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A #GstIteratorResult, as described above.
MT safe.</doc>
<type name="IteratorResult" c:type="GstIteratorResult"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to fold over</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="2">
<doc xml:space="preserve">the fold function</doc>
<type name="IteratorFoldFunction" c:type="GstIteratorFoldFunction"/>
</parameter>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">the seed value passed to the fold function</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the fold function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="foreach" c:identifier="gst_iterator_foreach">
<doc xml:space="preserve">Iterate over all element of @it and call the given function @func for
each element.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result call to gst_iterator_fold(). The iterator will not be
freed.
MT safe.</doc>
<type name="IteratorResult" c:type="GstIteratorResult"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to iterate</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">the function to call for each element.</doc>
<type name="IteratorForeachFunction" c:type="GstIteratorForeachFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_iterator_free">
<doc xml:space="preserve">Free the iterator.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to free</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
</parameters>
</method>
<method name="next" c:identifier="gst_iterator_next">
<doc xml:space="preserve">Get the next item from the iterator in @elem.
Only when this function returns %GST_ITERATOR_OK, @elem will contain a valid
value. @elem must have been initialized to the type of the iterator or
initialized to zeroes with g_value_unset(). The caller is responsible for
unsetting or resetting @elem with g_value_unset() or g_value_reset()
after usage.
When this function returns %GST_ITERATOR_DONE, no more elements can be
retrieved from @it.
A return value of %GST_ITERATOR_RESYNC indicates that the element list was
concurrently updated. The user of @it should call gst_iterator_resync() to
get the newly updated list.
A return value of %GST_ITERATOR_ERROR indicates an unrecoverable fatal error.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The result of the iteration. Unset @elem after usage.
MT safe.</doc>
<type name="IteratorResult" c:type="GstIteratorResult"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to iterate</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="elem" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">pointer to hold next element</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</method>
<method name="push" c:identifier="gst_iterator_push">
<doc xml:space="preserve">Pushes @other iterator onto @it. All calls performed on @it are
forwarded to @other. If @other returns %GST_ITERATOR_DONE, it is
popped again and calls are handled by @it again.
This function is mainly used by objects implementing the iterator
next function to recurse into substructures.
When gst_iterator_resync() is called on @it, @other will automatically be
popped.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to use</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
<parameter name="other" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to push</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
</parameters>
</method>
<method name="resync" c:identifier="gst_iterator_resync">
<doc xml:space="preserve">Resync the iterator. this function is mostly called
after gst_iterator_next() returned %GST_ITERATOR_RESYNC.
When an iterator was pushed on @it, it will automatically be popped again
with this function.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The #GstIterator to resync</doc>
<type name="Iterator" c:type="GstIterator*"/>
</instance-parameter>
</parameters>
</method>
</record>
<callback name="IteratorCopyFunction" c:type="GstIteratorCopyFunction">
<doc xml:space="preserve">This function will be called when creating a copy of @it and should
create a copy of all custom iterator fields or increase their
reference counts.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">The original iterator</doc>
<type name="Iterator" c:type="const GstIterator*"/>
</parameter>
<parameter name="copy" transfer-ownership="none">
<doc xml:space="preserve">The copied iterator</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
</parameters>
</callback>
<callback name="IteratorFoldFunction" c:type="GstIteratorFoldFunction">
<doc xml:space="preserve">A function to be passed to gst_iterator_fold().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the fold should continue, %FALSE if it should stop.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="item" transfer-ownership="none">
<doc xml:space="preserve">the item to fold</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">a #GValue collecting the result</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">data passed to gst_iterator_fold()</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="IteratorForeachFunction" c:type="GstIteratorForeachFunction">
<doc xml:space="preserve">A function that is called by gst_iterator_foreach() for every element.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="item" transfer-ownership="none">
<doc xml:space="preserve">The item</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">User data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="IteratorFreeFunction" c:type="GstIteratorFreeFunction">
<doc xml:space="preserve">This function will be called when the iterator is freed.
Implementors of a #GstIterator should implement this
function and pass it to the constructor of the custom iterator.
The function will be called with the iterator lock held.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">the iterator</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
</parameters>
</callback>
<enumeration name="IteratorItem" glib:type-name="GstIteratorItem" glib:get-type="gst_iterator_item_get_type" c:type="GstIteratorItem">
<doc xml:space="preserve">The result of a #GstIteratorItemFunction.</doc>
<member name="skip" value="0" c:identifier="GST_ITERATOR_ITEM_SKIP" glib:nick="skip">
<doc xml:space="preserve">Skip this item</doc>
</member>
<member name="pass" value="1" c:identifier="GST_ITERATOR_ITEM_PASS" glib:nick="pass">
<doc xml:space="preserve">Return item</doc>
</member>
<member name="end" value="2" c:identifier="GST_ITERATOR_ITEM_END" glib:nick="end">
<doc xml:space="preserve">Stop after this item.</doc>
</member>
</enumeration>
<callback name="IteratorItemFunction" c:type="GstIteratorItemFunction">
<doc xml:space="preserve">The function that will be called after the next item of the iterator
has been retrieved. This function can be used to skip items or stop
the iterator.
The function will be called with the iterator lock held.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the operation.</doc>
<type name="IteratorItem" c:type="GstIteratorItem"/>
</return-value>
<parameters>
<parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">the iterator</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
<parameter name="item" transfer-ownership="none">
<doc xml:space="preserve">the item being retrieved.</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</callback>
<callback name="IteratorNextFunction" c:type="GstIteratorNextFunction">
<doc xml:space="preserve">The function that will be called when the next element of the iterator
should be retrieved.
Implementors of a #GstIterator should implement this
function and pass it to the constructor of the custom iterator.
The function will be called with the iterator lock held.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the operation.</doc>
<type name="IteratorResult" c:type="GstIteratorResult"/>
</return-value>
<parameters>
<parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">the iterator</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
<parameter name="result" transfer-ownership="none">
<doc xml:space="preserve">a pointer to hold the next item</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</callback>
<enumeration name="IteratorResult" glib:type-name="GstIteratorResult" glib:get-type="gst_iterator_result_get_type" c:type="GstIteratorResult">
<doc xml:space="preserve">The result of gst_iterator_next().</doc>
<member name="done" value="0" c:identifier="GST_ITERATOR_DONE" glib:nick="done">
<doc xml:space="preserve">No more items in the iterator</doc>
</member>
<member name="ok" value="1" c:identifier="GST_ITERATOR_OK" glib:nick="ok">
<doc xml:space="preserve">An item was retrieved</doc>
</member>
<member name="resync" value="2" c:identifier="GST_ITERATOR_RESYNC" glib:nick="resync">
<doc xml:space="preserve">Datastructure changed while iterating</doc>
</member>
<member name="error" value="3" c:identifier="GST_ITERATOR_ERROR" glib:nick="error">
<doc xml:space="preserve">An error happened</doc>
</member>
</enumeration>
<callback name="IteratorResyncFunction" c:type="GstIteratorResyncFunction">
<doc xml:space="preserve">This function will be called whenever a concurrent update happened
to the iterated datastructure. The implementor of the iterator should
restart the iterator from the beginning and clean up any state it might
have.
Implementors of a #GstIterator should implement this
function and pass it to the constructor of the custom iterator.
The function will be called with the iterator lock held.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="it" transfer-ownership="none">
<doc xml:space="preserve">the iterator</doc>
<type name="Iterator" c:type="GstIterator*"/>
</parameter>
</parameters>
</callback>
<constant name="LICENSE_UNKNOWN" value="unknown" c:type="GST_LICENSE_UNKNOWN">
<doc xml:space="preserve">To be used in GST_PLUGIN_DEFINE if unsure about the licence.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="LOCK_FLAG_READWRITE" value="3" c:type="GST_LOCK_FLAG_READWRITE">
<doc xml:space="preserve">GstLockFlags value alias for GST_LOCK_FLAG_READ | GST_LOCK_FLAG_WRITE</doc>
<type name="LockFlags" c:type="GstLockFlags"/>
</constant>
<enumeration name="LibraryError" glib:type-name="GstLibraryError" glib:get-type="gst_library_error_get_type" c:type="GstLibraryError" glib:error-domain="gst-library-error-quark">
<doc xml:space="preserve">Library errors are for errors from the library being used by elements
(initializing, finalizing, settings, ...)</doc>
<member name="failed" value="1" c:identifier="GST_LIBRARY_ERROR_FAILED" glib:nick="failed">
<doc xml:space="preserve">a general error which doesn't fit in any other
category. Make sure you add a custom message to the error call.</doc>
</member>
<member name="too_lazy" value="2" c:identifier="GST_LIBRARY_ERROR_TOO_LAZY" glib:nick="too-lazy">
<doc xml:space="preserve">do not use this except as a placeholder for
deciding where to go while developing code.</doc>
</member>
<member name="init" value="3" c:identifier="GST_LIBRARY_ERROR_INIT" glib:nick="init">
<doc xml:space="preserve">used when the library could not be opened.</doc>
</member>
<member name="shutdown" value="4" c:identifier="GST_LIBRARY_ERROR_SHUTDOWN" glib:nick="shutdown">
<doc xml:space="preserve">used when the library could not be closed.</doc>
</member>
<member name="settings" value="5" c:identifier="GST_LIBRARY_ERROR_SETTINGS" glib:nick="settings">
<doc xml:space="preserve">used when the library doesn't accept settings.</doc>
</member>
<member name="encode" value="6" c:identifier="GST_LIBRARY_ERROR_ENCODE" glib:nick="encode">
<doc xml:space="preserve">used when the library generated an encoding error.</doc>
</member>
<member name="num_errors" value="7" c:identifier="GST_LIBRARY_ERROR_NUM_ERRORS" glib:nick="num-errors">
<doc xml:space="preserve">the number of library error types.</doc>
</member>
<function name="quark" c:identifier="gst_library_error_quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<bitfield name="LockFlags" glib:type-name="GstLockFlags" glib:get-type="gst_lock_flags_get_type" c:type="GstLockFlags">
<doc xml:space="preserve">Flags used when locking miniobjects</doc>
<member name="read" value="1" c:identifier="GST_LOCK_FLAG_READ" glib:nick="read">
<doc xml:space="preserve">lock for read access</doc>
</member>
<member name="write" value="2" c:identifier="GST_LOCK_FLAG_WRITE" glib:nick="write">
<doc xml:space="preserve">lock for write access</doc>
</member>
<member name="exclusive" value="4" c:identifier="GST_LOCK_FLAG_EXCLUSIVE" glib:nick="exclusive">
<doc xml:space="preserve">lock for exclusive access</doc>
</member>
<member name="last" value="256" c:identifier="GST_LOCK_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">first flag that can be used for custom purposes</doc>
</member>
</bitfield>
<callback name="LogFunction" c:type="GstLogFunction">
<doc xml:space="preserve">Function prototype for a logging function that can be registered with
gst_debug_add_log_function().
Use G_GNUC_NO_INSTRUMENT on that function.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugCategory</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">a #GstDebugLevel</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">file name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">function name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">line number</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GObject</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the message</doc>
<type name="DebugMessage" c:type="GstDebugMessage*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="7">
<doc xml:space="preserve">user data for the log function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<function-macro name="MAKE_FOURCC" c:identifier="GST_MAKE_FOURCC" introspectable="0">
<doc xml:space="preserve">Transform four characters into a #guint32 fourcc value with host
endianness.
|[
guint32 fourcc = GST_MAKE_FOURCC ('M', 'J', 'P', 'G');
]|</doc>
<parameters>
<parameter name="a">
<doc xml:space="preserve">the first character</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">the second character</doc>
</parameter>
<parameter name="c">
<doc xml:space="preserve">the third character</doc>
</parameter>
<parameter name="d">
<doc xml:space="preserve">the fourth character</doc>
</parameter>
</parameters>
</function-macro>
<constant name="MAP_READWRITE" value="3" c:type="GST_MAP_READWRITE">
<doc xml:space="preserve">GstMapFlags value alias for GST_MAP_READ | GST_MAP_WRITE</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</constant>
<function-macro name="MEMDUMP" c:identifier="GST_MEMDUMP" introspectable="0">
<doc xml:space="preserve">Output a hexdump of @data.
There is no need to finish the end of the message string with a newline
character, a newline character will be added automatically.</doc>
<parameters>
<parameter name="msg">
<doc xml:space="preserve">message string to log with the data</doc>
</parameter>
<parameter name="data">
<doc xml:space="preserve">pointer to the data to output</doc>
</parameter>
<parameter name="length">
<doc xml:space="preserve">length of the data to output</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMDUMP_OBJECT" c:identifier="GST_MEMDUMP_OBJECT" introspectable="0">
<doc xml:space="preserve">Output a logging message belonging to the given object in the default category.
There is no need to finish the end of the message string with a newline
character, a newline character will be added automatically.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">the #GObject the message belongs to</doc>
</parameter>
<parameter name="msg">
<doc xml:space="preserve">message string to log with the data</doc>
</parameter>
<parameter name="data">
<doc xml:space="preserve">pointer to the data to output</doc>
</parameter>
<parameter name="length">
<doc xml:space="preserve">length of the data to output</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_CAST" c:identifier="GST_MEMORY_CAST" introspectable="0">
<parameters>
<parameter name="mem">
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_FLAGS" c:identifier="GST_MEMORY_FLAGS" introspectable="0">
<doc xml:space="preserve">A flags word containing #GstMemoryFlags flags set on @mem</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_FLAG_IS_SET" c:identifier="GST_MEMORY_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">Gives the status of a specific flag on a @mem.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstMemoryFlags to check.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_FLAG_UNSET" c:identifier="GST_MEMORY_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">Clear a specific flag on a @mem.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstMemoryFlags to clear.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_NOT_MAPPABLE" c:identifier="GST_MEMORY_IS_NOT_MAPPABLE" version="1.2" introspectable="0">
<doc xml:space="preserve">Check if @mem can't be mapped via gst_memory_map() without any preconditions</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_NO_SHARE" c:identifier="GST_MEMORY_IS_NO_SHARE" introspectable="0">
<doc xml:space="preserve">Check if @mem cannot be shared between buffers</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_PHYSICALLY_CONTIGUOUS" c:identifier="GST_MEMORY_IS_PHYSICALLY_CONTIGUOUS" version="1.2" introspectable="0">
<doc xml:space="preserve">Check if @mem is physically contiguous.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_READONLY" c:identifier="GST_MEMORY_IS_READONLY" introspectable="0">
<doc xml:space="preserve">Check if @mem is readonly.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_ZERO_PADDED" c:identifier="GST_MEMORY_IS_ZERO_PADDED" introspectable="0">
<doc xml:space="preserve">Check if the padding in @mem is 0 filled.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MEMORY_IS_ZERO_PREFIXED" c:identifier="GST_MEMORY_IS_ZERO_PREFIXED" introspectable="0">
<doc xml:space="preserve">Check if the prefix in @mem is 0 filled.</doc>
<parameters>
<parameter name="mem">
<doc xml:space="preserve">a #GstMemory.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE" c:identifier="GST_MESSAGE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_CAST" c:identifier="GST_MESSAGE_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_GET_COND" c:identifier="GST_MESSAGE_GET_COND" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_GET_LOCK" c:identifier="GST_MESSAGE_GET_LOCK" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_LOCK" c:identifier="GST_MESSAGE_LOCK" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_SEQNUM" c:identifier="GST_MESSAGE_SEQNUM" introspectable="0">
<doc xml:space="preserve">Get the sequence number of @message.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_SIGNAL" c:identifier="GST_MESSAGE_SIGNAL" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_SRC" c:identifier="GST_MESSAGE_SRC" introspectable="0">
<doc xml:space="preserve">Get the object that posted @message.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_SRC_NAME" c:identifier="GST_MESSAGE_SRC_NAME" introspectable="0">
<doc xml:space="preserve">Get the name of the object that posted @message. Returns "(NULL)" if
the message has no source object set.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_TIMESTAMP" c:identifier="GST_MESSAGE_TIMESTAMP" introspectable="0">
<doc xml:space="preserve">Get the timestamp of @message. This is the timestamp when the message
was created.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_TYPE" c:identifier="GST_MESSAGE_TYPE" introspectable="0">
<doc xml:space="preserve">Get the #GstMessageType of @message.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_TYPE_IS_EXTENDED" c:identifier="GST_MESSAGE_TYPE_IS_EXTENDED" version="1.4" introspectable="0">
<doc xml:space="preserve">Check if the message is in the extended message group</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_TYPE_NAME" c:identifier="GST_MESSAGE_TYPE_NAME" introspectable="0">
<doc xml:space="preserve">Get a constant string representation of the #GstMessageType of @message.</doc>
<parameters>
<parameter name="message">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_UNLOCK" c:identifier="GST_MESSAGE_UNLOCK" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="MESSAGE_WAIT" c:identifier="GST_MESSAGE_WAIT" introspectable="0">
<parameters>
<parameter name="message">
</parameter>
</parameters>
</function-macro>
<function-macro name="META_CAST" c:identifier="GST_META_CAST" introspectable="0">
<parameters>
<parameter name="meta">
</parameter>
</parameters>
</function-macro>
<function-macro name="META_FLAGS" c:identifier="GST_META_FLAGS" introspectable="0">
<doc xml:space="preserve">A flags word containing #GstMetaFlags flags set on @meta</doc>
<parameters>
<parameter name="meta">
<doc xml:space="preserve">a #GstMeta.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="META_FLAG_IS_SET" c:identifier="GST_META_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">Gives the status of a specific flag on a metadata.</doc>
<parameters>
<parameter name="meta">
<doc xml:space="preserve">a #GstMeta.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstMetaFlags to check.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="META_FLAG_SET" c:identifier="GST_META_FLAG_SET" introspectable="0">
<doc xml:space="preserve">Sets a metadata flag on a metadata.</doc>
<parameters>
<parameter name="meta">
<doc xml:space="preserve">a #GstMeta.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstMetaFlags to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="META_FLAG_UNSET" c:identifier="GST_META_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">Clears a metadata flag.</doc>
<parameters>
<parameter name="meta">
<doc xml:space="preserve">a #GstMeta.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">the #GstMetaFlags to clear.</doc>
</parameter>
</parameters>
</function-macro>
<constant name="META_TAG_MEMORY_STR" value="memory" c:type="GST_META_TAG_MEMORY_STR" version="1.2">
<doc xml:space="preserve">This metadata stays relevant as long as memory layout is unchanged.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="META_TRANSFORM_IS_COPY" c:identifier="GST_META_TRANSFORM_IS_COPY" introspectable="0">
<doc xml:space="preserve">Check if the transform type is a copy transform</doc>
<parameters>
<parameter name="type">
<doc xml:space="preserve">a transform type</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT" c:identifier="GST_MINI_OBJECT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_CAST" c:identifier="GST_MINI_OBJECT_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_CONST_CAST" c:identifier="GST_MINI_OBJECT_CONST_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_FLAGS" c:identifier="GST_MINI_OBJECT_FLAGS" introspectable="0">
<doc xml:space="preserve">This macro returns the entire set of flags for the mini-object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">MiniObject to return flags for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_FLAG_IS_SET" c:identifier="GST_MINI_OBJECT_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">This macro checks to see if the given flag is set.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">MiniObject to check for flags.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to check for</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_FLAG_SET" c:identifier="GST_MINI_OBJECT_FLAG_SET" introspectable="0">
<doc xml:space="preserve">This macro sets the given bits.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">MiniObject to set flag in.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to set, can by any number of bits in guint32.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_FLAG_UNSET" c:identifier="GST_MINI_OBJECT_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">This macro unsets the given bits.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">MiniObject to unset flag in.</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to set, must be a single bit in guint32.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_IS_LOCKABLE" c:identifier="GST_MINI_OBJECT_IS_LOCKABLE" introspectable="0">
<doc xml:space="preserve">Check if @obj is lockable. A lockable object can be locked and unlocked with
gst_mini_object_lock() and gst_mini_object_unlock().</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstMiniObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_REFCOUNT" c:identifier="GST_MINI_OBJECT_REFCOUNT" introspectable="0">
<doc xml:space="preserve">Get access to the reference count field of the mini-object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstMiniObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_REFCOUNT_VALUE" c:identifier="GST_MINI_OBJECT_REFCOUNT_VALUE" introspectable="0">
<doc xml:space="preserve">Get the reference count value of the mini-object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstMiniObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="MINI_OBJECT_TYPE" c:identifier="GST_MINI_OBJECT_TYPE" introspectable="0">
<doc xml:space="preserve">This macro returns the type of the mini-object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">MiniObject to return type for.</doc>
</parameter>
</parameters>
</function-macro>
<constant name="MSECOND" value="1000000" c:type="GST_MSECOND">
<doc xml:space="preserve">Constant that defines one GStreamer millisecond.</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</constant>
<bitfield name="MapFlags" glib:type-name="GstMapFlags" glib:get-type="gst_map_flags_get_type" c:type="GstMapFlags">
<doc xml:space="preserve">Flags used when mapping memory</doc>
<member name="read" value="1" c:identifier="GST_MAP_READ" glib:nick="read">
<doc xml:space="preserve">map for read access</doc>
</member>
<member name="write" value="2" c:identifier="GST_MAP_WRITE" glib:nick="write">
<doc xml:space="preserve">map for write access</doc>
</member>
<member name="flag_last" value="65536" c:identifier="GST_MAP_FLAG_LAST" glib:nick="flag-last">
<doc xml:space="preserve">first flag that can be used for custom purposes</doc>
</member>
</bitfield>
<record name="MapInfo" c:type="GstMapInfo">
<doc xml:space="preserve">A structure containing the result of a map operation such as
gst_memory_map(). It contains the data and size.</doc>
<field name="memory" writable="1">
<doc xml:space="preserve">a pointer to the mapped memory</doc>
<type name="Memory" c:type="GstMemory*"/>
</field>
<field name="flags" writable="1">
<doc xml:space="preserve">flags used when mapping the memory</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</field>
<field name="data" writable="1">
<doc xml:space="preserve">a pointer to the mapped data</doc>
<array length="3" zero-terminated="0" c:type="guint8*">
<type name="guint8" c:type="guint8"/>
</array>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">the valid size in @data</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="maxsize" writable="1">
<doc xml:space="preserve">the maximum bytes in @data</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="user_data" writable="1">
<doc xml:space="preserve">extra private user_data that the implementation of the memory
can use to store extra info.</doc>
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="Memory" c:type="GstMemory" glib:type-name="GstMemory" glib:get-type="gst_memory_get_type" c:symbol-prefix="memory">
<doc xml:space="preserve">GstMemory is a lightweight refcounted object that wraps a region of memory.
They are typically used to manage the data of a #GstBuffer.
A GstMemory object has an allocated region of memory of maxsize. The maximum
size does not change during the lifetime of the memory object. The memory
also has an offset and size property that specifies the valid range of memory
in the allocated region.
Memory is usually created by allocators with a gst_allocator_alloc()
method call. When %NULL is used as the allocator, the default allocator will
be used.
New allocators can be registered with gst_allocator_register().
Allocators are identified by name and can be retrieved with
gst_allocator_find(). gst_allocator_set_default() can be used to change the
default allocator.
New memory can be created with gst_memory_new_wrapped() that wraps the memory
allocated elsewhere.
Refcounting of the memory block is performed with gst_memory_ref() and
gst_memory_unref().
The size of the memory can be retrieved and changed with
gst_memory_get_sizes() and gst_memory_resize() respectively.
Getting access to the data of the memory is performed with gst_memory_map().
The call will return a pointer to offset bytes into the region of memory.
After the memory access is completed, gst_memory_unmap() should be called.
Memory can be copied with gst_memory_copy(), which will return a writable
copy. gst_memory_share() will create a new memory block that shares the
memory with an existing memory block at a custom offset and with a custom
size.
Memory can be efficiently merged when gst_memory_is_span() returns %TRUE.</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">parent structure</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<field name="allocator" writable="1">
<doc xml:space="preserve">pointer to the #GstAllocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</field>
<field name="parent" writable="1">
<doc xml:space="preserve">parent memory block</doc>
<type name="Memory" c:type="GstMemory*"/>
</field>
<field name="maxsize" writable="1">
<doc xml:space="preserve">the maximum size allocated</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="align" writable="1">
<doc xml:space="preserve">the alignment of the memory</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="offset" writable="1">
<doc xml:space="preserve">the offset where valid data starts</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">the size of valid data</doc>
<type name="gsize" c:type="gsize"/>
</field>
<constructor name="new_wrapped" c:identifier="gst_memory_new_wrapped">
<doc xml:space="preserve">Allocate a new memory block that wraps the given @data.
The prefix/padding must be filled with 0 if @flags contains
#GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED respectively.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstMemoryFlags</doc>
<type name="MemoryFlags" c:type="GstMemoryFlags"/>
</parameter>
<parameter name="data" transfer-ownership="none">
<doc xml:space="preserve">data to
wrap</doc>
<array length="4" zero-terminated="0" c:type="gpointer">
<type name="guint8"/>
</array>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">allocated size of @data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">offset in @data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size of valid data</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" nullable="1" allow-none="1" scope="async" closure="5">
<doc xml:space="preserve">called with @user_data when the memory is freed</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</constructor>
<method name="copy" c:identifier="gst_memory_copy">
<doc xml:space="preserve">Return a copy of @size bytes from @mem starting from @offset. This copy is
guaranteed to be writable. @size can be set to -1 to return a copy
from @offset to the end of the memory region.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">offset to copy from</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size to copy, or -1 to copy to the end of the memory region</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="get_sizes" c:identifier="gst_memory_get_sizes">
<doc xml:space="preserve">Get the current @size, @offset and @maxsize of @mem.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the current size of @mem</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="offset" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to offset</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
<parameter name="maxsize" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">pointer to maxsize</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="init" c:identifier="gst_memory_init" introspectable="0">
<doc xml:space="preserve">Initializes a newly allocated @mem with the given parameters. This function
will call gst_mini_object_init() with the default memory parameters.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstMemoryFlags</doc>
<type name="MemoryFlags" c:type="GstMemoryFlags"/>
</parameter>
<parameter name="allocator" transfer-ownership="none">
<doc xml:space="preserve">the #GstAllocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent of @mem</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">the total size of the memory</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="align" transfer-ownership="none">
<doc xml:space="preserve">the alignment of the memory</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">The offset in the memory</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of valid data in the memory</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="is_span" c:identifier="gst_memory_is_span">
<doc xml:space="preserve">Check if @mem1 and mem2 share the memory with a common parent memory object
and that the memory is contiguous.
If this is the case, the memory of @mem1 and @mem2 can be merged
efficiently by performing gst_memory_share() on the parent object from
the returned @offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the memory is contiguous and of a common parent.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="mem1" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="mem2" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="offset" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a result offset</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</method>
<method name="is_type" c:identifier="gst_memory_is_type" version="1.2">
<doc xml:space="preserve">Check if @mem if allocated with an allocator for @mem_type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @mem was allocated from an allocator for @mem_type.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="mem_type" transfer-ownership="none">
<doc xml:space="preserve">a memory type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="make_mapped" c:identifier="gst_memory_make_mapped">
<doc xml:space="preserve">Create a #GstMemory object that is mapped with @flags. If @mem is mappable
with @flags, this function returns the mapped @mem directly. Otherwise a
mapped copy of @mem is returned.
This function takes ownership of old @mem and returns a reference to a new
#GstMemory.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstMemory object mapped
with @flags or %NULL when a mapping is not possible.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="full">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="info" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">pointer for info</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">mapping flags</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</parameter>
</parameters>
</method>
<method name="map" c:identifier="gst_memory_map">
<doc xml:space="preserve">Fill @info with the pointer and sizes of the memory in @mem that can be
accessed according to @flags.
This function can return %FALSE for various reasons:
- the memory backed by @mem is not accessible with the given @flags.
- the memory was already mapped with a different mapping.
@info and its contents remain valid for as long as @mem is valid and
until gst_memory_unmap() is called.
For each gst_memory_map() call, a corresponding gst_memory_unmap() call
should be done.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the map operation was successful.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="info" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">pointer for info</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">mapping flags</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_memory_ref" introspectable="0">
<doc xml:space="preserve">Increase the refcount of this memory.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@memory (for convenience when doing assignments)</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="memory" transfer-ownership="none">
<doc xml:space="preserve">The memory to refcount</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
</parameters>
</method>
<method name="resize" c:identifier="gst_memory_resize">
<doc xml:space="preserve">Resize the memory region. @mem should be writable and offset + size should be
less than the maxsize of @mem.
#GST_MEMORY_FLAG_ZERO_PREFIXED and #GST_MEMORY_FLAG_ZERO_PADDED will be
cleared when offset or padding is increased respectively.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">a new offset</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">a new size</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</method>
<method name="share" c:identifier="gst_memory_share">
<doc xml:space="preserve">Return a shared copy of @size bytes from @mem starting from @offset. No
memory copy is performed and the memory region is simply shared. The result
is guaranteed to be non-writable. @size can be set to -1 to return a shared
copy from @offset to the end of the memory region.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstMemory.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">offset to share from</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">size to share, or -1 to share to the end of the memory region</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</method>
<method name="unmap" c:identifier="gst_memory_unmap">
<doc xml:space="preserve">Release the memory obtained with gst_memory_map()</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstMapInfo</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_memory_unref" introspectable="0">
<doc xml:space="preserve">Decrease the refcount of a memory, freeing it if the refcount reaches 0.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="memory" transfer-ownership="full">
<doc xml:space="preserve">the memory to refcount</doc>
<type name="Memory" c:type="GstMemory*"/>
</instance-parameter>
</parameters>
</method>
</record>
<callback name="MemoryCopyFunction" c:type="GstMemoryCopyFunction">
<doc xml:space="preserve">Copy @size bytes from @mem starting at @offset and return them wrapped in a
new GstMemory object.
If @size is set to -1, all bytes starting at @offset are copied.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstMemory object wrapping a copy of the requested region in
@mem.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">an offset</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">a size or -1</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</callback>
<bitfield name="MemoryFlags" glib:type-name="GstMemoryFlags" glib:get-type="gst_memory_flags_get_type" c:type="GstMemoryFlags">
<doc xml:space="preserve">Flags for wrapped memory.</doc>
<member name="readonly" value="2" c:identifier="GST_MEMORY_FLAG_READONLY" glib:nick="readonly">
<doc xml:space="preserve">memory is readonly. It is not allowed to map the
memory with #GST_MAP_WRITE.</doc>
</member>
<member name="no_share" value="16" c:identifier="GST_MEMORY_FLAG_NO_SHARE" glib:nick="no-share">
<doc xml:space="preserve">memory must not be shared. Copies will have to be
made when this memory needs to be shared between buffers.</doc>
</member>
<member name="zero_prefixed" value="32" c:identifier="GST_MEMORY_FLAG_ZERO_PREFIXED" glib:nick="zero-prefixed">
<doc xml:space="preserve">the memory prefix is filled with 0 bytes</doc>
</member>
<member name="zero_padded" value="64" c:identifier="GST_MEMORY_FLAG_ZERO_PADDED" glib:nick="zero-padded">
<doc xml:space="preserve">the memory padding is filled with 0 bytes</doc>
</member>
<member name="physically_contiguous" value="128" c:identifier="GST_MEMORY_FLAG_PHYSICALLY_CONTIGUOUS" glib:nick="physically-contiguous">
<doc xml:space="preserve">the memory is physically contiguous. (Since: 1.2)</doc>
</member>
<member name="not_mappable" value="256" c:identifier="GST_MEMORY_FLAG_NOT_MAPPABLE" glib:nick="not-mappable">
<doc xml:space="preserve">the memory can't be mapped via gst_memory_map() without any preconditions. (Since: 1.2)</doc>
</member>
<member name="last" value="1048576" c:identifier="GST_MEMORY_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">first flag that can be used for custom purposes</doc>
</member>
</bitfield>
<callback name="MemoryIsSpanFunction" c:type="GstMemoryIsSpanFunction">
<doc xml:space="preserve">Check if @mem1 and @mem2 occupy contiguous memory and return the offset of
@mem1 in the parent buffer in @offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @mem1 and @mem2 are in contiguous memory.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="mem1" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="mem2" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">a result offset</doc>
<type name="gsize" c:type="gsize*"/>
</parameter>
</parameters>
</callback>
<callback name="MemoryMapFullFunction" c:type="GstMemoryMapFullFunction">
<doc xml:space="preserve">Get the memory of @mem that can be accessed according to the mode specified
in @info's flags. The function should return a pointer that contains at least
@maxsize bytes.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer to memory of which at least @maxsize bytes can be
accessed according to the access pattern in @info's flags.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">the #GstMapInfo to map with</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">size to map</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
</parameters>
</callback>
<callback name="MemoryMapFunction" c:type="GstMemoryMapFunction">
<doc xml:space="preserve">Get the memory of @mem that can be accessed according to the mode specified
in @flags. The function should return a pointer that contains at least
@maxsize bytes.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer to memory of which at least @maxsize bytes can be
accessed according to the access pattern in @flags.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">size to map</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">access mode for the memory</doc>
<type name="MapFlags" c:type="GstMapFlags"/>
</parameter>
</parameters>
</callback>
<callback name="MemoryShareFunction" c:type="GstMemoryShareFunction">
<doc xml:space="preserve">Share @size bytes from @mem starting at @offset and return them wrapped in a
new GstMemory object. If @size is set to -1, all bytes starting at @offset are
shared. This function does not make a copy of the bytes in @mem.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstMemory object sharing the requested region in @mem.</doc>
<type name="Memory" c:type="GstMemory*"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">an offset</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">a size or -1</doc>
<type name="gssize" c:type="gssize"/>
</parameter>
</parameters>
</callback>
<callback name="MemoryUnmapFullFunction" c:type="GstMemoryUnmapFullFunction">
<doc xml:space="preserve">Release the pointer previously retrieved with gst_memory_map() with @info.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstMapInfo</doc>
<type name="MapInfo" c:type="GstMapInfo*"/>
</parameter>
</parameters>
</callback>
<callback name="MemoryUnmapFunction" c:type="GstMemoryUnmapFunction">
<doc xml:space="preserve">Release the pointer previously retrieved with gst_memory_map().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a #GstMemory</doc>
<type name="Memory" c:type="GstMemory*"/>
</parameter>
</parameters>
</callback>
<record name="Message" c:type="GstMessage" glib:type-name="GstMessage" glib:get-type="gst_message_get_type" c:symbol-prefix="message">
<doc xml:space="preserve">Messages are implemented as a subclass of #GstMiniObject with a generic
#GstStructure as the content. This allows for writing custom messages without
requiring an API change while allowing a wide range of different types
of messages.
Messages are posted by objects in the pipeline and are passed to the
application using the #GstBus.
The basic use pattern of posting a message on a #GstBus is as follows:
|[&lt;!-- language="C" --&gt;
gst_bus_post (bus, gst_message_new_eos());
]|
A #GstElement usually posts messages on the bus provided by the parent
container using gst_element_post_message().</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">the parent structure</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<field name="type" writable="1">
<doc xml:space="preserve">the #GstMessageType of the message</doc>
<type name="MessageType" c:type="GstMessageType"/>
</field>
<field name="timestamp" writable="1">
<doc xml:space="preserve">the timestamp of the message</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="src" writable="1">
<doc xml:space="preserve">the src of the message</doc>
<type name="Object" c:type="GstObject*"/>
</field>
<field name="seqnum" writable="1">
<doc xml:space="preserve">the sequence number of the message</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="lock" readable="0" private="1">
<type name="GLib.Mutex" c:type="GMutex"/>
</field>
<field name="cond" readable="0" private="1">
<type name="GLib.Cond" c:type="GCond"/>
</field>
<constructor name="new_application" c:identifier="gst_message_new_application">
<doc xml:space="preserve">Create a new application-typed message. GStreamer will never create these
messages; they are a gift from us to you. Enjoy.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The new application message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the structure for the message. The message
will take ownership of the structure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_async_done" c:identifier="gst_message_new_async_done">
<doc xml:space="preserve">The message is posted when elements completed an ASYNC state change.
@running_time contains the time of the desired running_time when this
elements goes to PLAYING. A value of #GST_CLOCK_TIME_NONE for @running_time
means that the element has no clock interaction and thus doesn't care about
the running_time of the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new async_done message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the desired running_time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_async_start" c:identifier="gst_message_new_async_start">
<doc xml:space="preserve">This message is posted by elements when they start an ASYNC state change.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new async_start message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_buffering" c:identifier="gst_message_new_buffering">
<doc xml:space="preserve">Create a new buffering message. This message can be posted by an element that
needs to buffer data before it can continue processing. @percent should be a
value between 0 and 100. A value of 100 means that the buffering completed.
When @percent is &lt; 100 the application should PAUSE a PLAYING pipeline. When
@percent is 100, the application can set the pipeline (back) to PLAYING.
The application must be prepared to receive BUFFERING messages in the
PREROLLING state and may only set the pipeline to PLAYING after receiving a
message with @percent set to 100, which can happen after the pipeline
completed prerolling.
MT safe.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The new buffering message.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="percent" transfer-ownership="none">
<doc xml:space="preserve">The buffering percent</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_clock_lost" c:identifier="gst_message_new_clock_lost">
<doc xml:space="preserve">Create a clock lost message. This message is posted whenever the
clock is not valid anymore.
If this message is posted by the pipeline, the pipeline will
select a new clock again when it goes to PLAYING. It might therefore
be needed to set the pipeline to PAUSED and PLAYING again.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new clock lost message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">the clock that was lost</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_clock_provide" c:identifier="gst_message_new_clock_provide">
<doc xml:space="preserve">Create a clock provide message. This message is posted whenever an
element is ready to provide a clock or lost its ability to provide
a clock (maybe because it paused or became EOS).
This message is mainly used internally to manage the clock
selection.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new provide clock message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">the clock it provides</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
<parameter name="ready" transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the sender can provide a clock</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_custom" c:identifier="gst_message_new_custom">
<doc xml:space="preserve">Create a new custom-typed message. This can be used for anything not
handled by other message-specific functions to pass a message to the
app. The structure field can be %NULL.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The new message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">The #GstMessageType to distinguish messages</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="structure" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">the structure for the
message. The message will take ownership of the structure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_device_added" c:identifier="gst_message_new_device_added" version="1.4">
<doc xml:space="preserve">Creates a new device-added message. The device-added message is produced by
#GstDeviceProvider or a #GstDeviceMonitor. They announce the appearance
of monitored devices.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that created the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">The new #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_device_changed" c:identifier="gst_message_new_device_changed" version="1.16">
<doc xml:space="preserve">Creates a new device-changed message. The device-changed message is produced
by #GstDeviceProvider or a #GstDeviceMonitor. They announce that a device
properties has changed and @device represent the new modified version of @changed_device.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that created the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">The newly created device representing @replaced_device
with its new configuration.</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
<parameter name="changed_device" transfer-ownership="none">
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_device_removed" c:identifier="gst_message_new_device_removed" version="1.4">
<doc xml:space="preserve">Creates a new device-removed message. The device-removed message is produced
by #GstDeviceProvider or a #GstDeviceMonitor. They announce the
disappearance of monitored devices.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that created the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="device" transfer-ownership="none">
<doc xml:space="preserve">The removed #GstDevice</doc>
<type name="Device" c:type="GstDevice*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_duration_changed" c:identifier="gst_message_new_duration_changed">
<doc xml:space="preserve">Create a new duration changed message. This message is posted by elements
that know the duration of a stream when the duration changes. This message
is received by bins and is used to calculate the total duration of a
pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new duration-changed message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_element" c:identifier="gst_message_new_element">
<doc xml:space="preserve">Create a new element-specific message. This is meant as a generic way of
allowing one-way communication from an element to an application, for example
"the firewire cable was unplugged". The format of the message should be
documented in the element's documentation. The structure field can be %NULL.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The new element message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">The structure for the
message. The message will take ownership of the structure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_eos" c:identifier="gst_message_new_eos">
<doc xml:space="preserve">Create a new eos message. This message is generated and posted in
the sink elements of a GstBin. The bin will only forward the EOS
message to the application if all sinks have posted an EOS message.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new eos message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_error" c:identifier="gst_message_new_error">
<doc xml:space="preserve">Create a new error message. The message will copy @error and
@debug. This message is posted by element when a fatal event
occurred. The pipeline will probably (partially) stop. The application
receiving this message should stop the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new error message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_error_with_details" c:identifier="gst_message_new_error_with_details" version="1.10">
<doc xml:space="preserve">Create a new error message. The message will copy @error and
@debug. This message is posted by element when a fatal event
occurred. The pipeline will probably (partially) stop. The application
receiving this message should stop the pipeline.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new error message.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="details" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">A GstStructure with details</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_have_context" c:identifier="gst_message_new_have_context" version="1.2">
<doc xml:space="preserve">This message is posted when an element has a new local #GstContext.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new have-context message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="context" transfer-ownership="full">
<doc xml:space="preserve">the context</doc>
<type name="Context" c:type="GstContext*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_info" c:identifier="gst_message_new_info">
<doc xml:space="preserve">Create a new info message. The message will make copies of @error and
@debug.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new info message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_info_with_details" c:identifier="gst_message_new_info_with_details" version="1.10">
<doc xml:space="preserve">Create a new info message. The message will make copies of @error and
@debug.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new warning message.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="details" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">A GstStructure with details</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_instant_rate_request" c:identifier="gst_message_new_instant_rate_request" version="1.18">
<doc xml:space="preserve">Creates a new instant-rate-request message. Elements handling the
instant-rate-change event must post this message. The message is
handled at the pipeline, and allows the pipeline to select the
running time when the rate change should happen and to send an
@GST_EVENT_INSTANT_RATE_SYNC_TIME event to notify the elements
in the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that posted the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="rate_multiplier" transfer-ownership="none">
<doc xml:space="preserve">the rate multiplier factor that should be applied</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_latency" c:identifier="gst_message_new_latency">
<doc xml:space="preserve">This message can be posted by elements when their latency requirements have
changed.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new latency message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_need_context" c:identifier="gst_message_new_need_context" version="1.2">
<doc xml:space="preserve">This message is posted when an element needs a specific #GstContext.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new need-context message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">The context type that is needed</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_new_clock" c:identifier="gst_message_new_new_clock">
<doc xml:space="preserve">Create a new clock message. This message is posted whenever the
pipeline selects a new clock for the pipeline.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new new clock message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">the new selected clock</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_progress" c:identifier="gst_message_new_progress">
<doc xml:space="preserve">Progress messages are posted by elements when they use an asynchronous task
to perform actions triggered by a state change.
@code contains a well defined string describing the action.
@text should contain a user visible string detailing the current action.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The new qos message.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstProgressType</doc>
<type name="ProgressType" c:type="GstProgressType"/>
</parameter>
<parameter name="code" transfer-ownership="none">
<doc xml:space="preserve">a progress code</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="text" transfer-ownership="none">
<doc xml:space="preserve">free, user visible text describing the progress</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_property_notify" c:identifier="gst_message_new_property_notify" version="1.10">
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject whose property changed (may or may not be a #GstElement)</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the property that changed</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="val" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">new property value, or %NULL</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_qos" c:identifier="gst_message_new_qos">
<doc xml:space="preserve">A QOS message is posted on the bus whenever an element decides to drop a
buffer because of QoS reasons or whenever it changes its processing strategy
because of QoS reasons (quality adjustments such as processing at lower
accuracy).
This message can be posted by an element that performs synchronisation against the
clock (live) or it could be dropped by an element that performs QoS because of QOS
events received from a downstream element (!live).
@running_time, @stream_time, @timestamp, @duration should be set to the
respective running-time, stream-time, timestamp and duration of the (dropped)
buffer that generated the QoS event. Values can be left to
GST_CLOCK_TIME_NONE when unknown.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new qos message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="live" transfer-ownership="none">
<doc xml:space="preserve">if the message was generated by a live element</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the running time of the buffer that generated the message</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="stream_time" transfer-ownership="none">
<doc xml:space="preserve">the stream time of the buffer that generated the message</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the timestamps of the buffer that generated the message</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="duration" transfer-ownership="none">
<doc xml:space="preserve">the duration of the buffer that generated the message</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_redirect" c:identifier="gst_message_new_redirect" version="1.10">
<doc xml:space="preserve">Creates a new redirect message and adds a new entry to it. Redirect messages
are posted when an element detects that the actual data has to be retrieved
from a different location. This is useful if such a redirection cannot be
handled inside a source element, for example when HTTP 302/303 redirects
return a non-HTTP URL.
The redirect message can hold multiple entries. The first one is added
when the redirect message is created, with the given location, tag_list,
entry_struct arguments. Use gst_message_add_redirect_entry() to add more
entries.
Each entry has a location, a tag list, and a structure. All of these are
optional. The tag list and structure are useful for additional metadata,
such as bitrate statistics for the given location.
By default, message recipients should treat entries in the order they are
stored. The recipient should therefore try entry \#0 first, and if this
entry is not acceptable or working, try entry \#1 etc. Senders must make
sure that they add entries in this order. However, recipients are free to
ignore the order and pick an entry that is "best" for them. One example
would be a recipient that scans the entries for the one with the highest
bitrate tag.
The specified location string is copied. However, ownership over the tag
list and structure are transferred to the message.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject whose property changed (may or may not be a #GstElement)</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="location" transfer-ownership="none">
<doc xml:space="preserve">location string for the new entry</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag_list" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">tag list for the new entry</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
<parameter name="entry_struct" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">structure for the new entry</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_request_state" c:identifier="gst_message_new_request_state">
<doc xml:space="preserve">This message can be posted by elements when they want to have their state
changed. A typical use case would be an audio server that wants to pause the
pipeline because a higher priority stream is being played.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new request state message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">The new requested state</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_reset_time" c:identifier="gst_message_new_reset_time">
<doc xml:space="preserve">This message is posted when the pipeline running-time should be reset to
@running_time, like after a flushing seek.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new reset_time message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the requested running-time</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_segment_done" c:identifier="gst_message_new_segment_done">
<doc xml:space="preserve">Create a new segment done message. This message is posted by elements that
finish playback of a segment as a result of a segment seek. This message
is received by the application after all elements that posted a segment_start
have posted the segment_done.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new segment done message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format of the position being done</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">The position of the segment being done</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_segment_start" c:identifier="gst_message_new_segment_start">
<doc xml:space="preserve">Create a new segment message. This message is posted by elements that
start playback of a segment as a result of a segment seek. This message
is not received by the application but is used for maintenance reasons in
container elements.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new segment start message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format of the position being played</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">The position of the segment being played</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_state_changed" c:identifier="gst_message_new_state_changed">
<doc xml:space="preserve">Create a state change message. This message is posted whenever an element
changed its state.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new state change message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="oldstate" transfer-ownership="none">
<doc xml:space="preserve">the previous state</doc>
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="newstate" transfer-ownership="none">
<doc xml:space="preserve">the new (current) state</doc>
<type name="State" c:type="GstState"/>
</parameter>
<parameter name="pending" transfer-ownership="none">
<doc xml:space="preserve">the pending (target) state</doc>
<type name="State" c:type="GstState"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_state_dirty" c:identifier="gst_message_new_state_dirty">
<doc xml:space="preserve">Create a state dirty message. This message is posted whenever an element
changed its state asynchronously and is used internally to update the
states of container objects.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new state dirty message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_step_done" c:identifier="gst_message_new_step_done">
<doc xml:space="preserve">This message is posted by elements when they complete a part, when @intermediate set
to %TRUE, or a complete step operation.
@duration will contain the amount of time (in GST_FORMAT_TIME) of the stepped
@amount of media in format @format.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new step_done message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of @amount</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="amount" transfer-ownership="none">
<doc xml:space="preserve">the amount of stepped data</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">the rate of the stepped amount</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="flush" transfer-ownership="none">
<doc xml:space="preserve">is this an flushing step</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="intermediate" transfer-ownership="none">
<doc xml:space="preserve">is this an intermediate step</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="duration" transfer-ownership="none">
<doc xml:space="preserve">the duration of the data</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="eos" transfer-ownership="none">
<doc xml:space="preserve">the step caused EOS</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_step_start" c:identifier="gst_message_new_step_start">
<doc xml:space="preserve">This message is posted by elements when they accept or activate a new step
event for @amount in @format.
@active is set to %FALSE when the element accepted the new step event and has
queued it for execution in the streaming threads.
@active is set to %TRUE when the element has activated the step operation and
is now ready to start executing the step in the streaming thread. After this
message is emitted, the application can queue a new step operation in the
element.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new step_start message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">if the step is active or queued</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of @amount</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="amount" transfer-ownership="none">
<doc xml:space="preserve">the amount of stepped data</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">the rate of the stepped amount</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="flush" transfer-ownership="none">
<doc xml:space="preserve">is this an flushing step</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="intermediate" transfer-ownership="none">
<doc xml:space="preserve">is this an intermediate step</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_collection" c:identifier="gst_message_new_stream_collection" version="1.10">
<doc xml:space="preserve">Creates a new stream-collection message. The message is used to announce new
#GstStreamCollection</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that created the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">The #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_start" c:identifier="gst_message_new_stream_start">
<doc xml:space="preserve">Create a new stream_start message. This message is generated and posted in
the sink elements of a GstBin. The bin will only forward the STREAM_START
message to the application if all sinks have posted an STREAM_START message.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new stream_start message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_stream_status" c:identifier="gst_message_new_stream_status">
<doc xml:space="preserve">Create a new stream status message. This message is posted when a streaming
thread is created/destroyed or when the state changed.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new stream status message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">The stream status type.</doc>
<type name="StreamStatusType" c:type="GstStreamStatusType"/>
</parameter>
<parameter name="owner" transfer-ownership="none">
<doc xml:space="preserve">the owner element of @src.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_streams_selected" c:identifier="gst_message_new_streams_selected" version="1.10">
<doc xml:space="preserve">Creates a new steams-selected message. The message is used to announce
that an array of streams has been selected. This is generally in response
to a #GST_EVENT_SELECT_STREAMS event, or when an element (such as decodebin3)
makes an initial selection of streams.
The message also contains the #GstStreamCollection to which the various streams
belong to.
Users of gst_message_new_streams_selected() can add the selected streams with
gst_message_streams_selected_add().</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated #GstMessage</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">The #GstObject that created the message</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">The #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_structure_change" c:identifier="gst_message_new_structure_change">
<doc xml:space="preserve">Create a new structure change message. This message is posted when the
structure of a pipeline is in the process of being changed, for example
when pads are linked or unlinked.
@src should be the sinkpad that unlinked or linked.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new structure change message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">The change type.</doc>
<type name="StructureChangeType" c:type="GstStructureChangeType"/>
</parameter>
<parameter name="owner" transfer-ownership="none">
<doc xml:space="preserve">The owner element of @src.</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="busy" transfer-ownership="none">
<doc xml:space="preserve">Whether the structure change is busy.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_tag" c:identifier="gst_message_new_tag">
<doc xml:space="preserve">Create a new tag message. The message will take ownership of the tag list.
The message is posted by elements that discovered a new taglist.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new tag message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="tag_list" transfer-ownership="full">
<doc xml:space="preserve">the tag list for the message.</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_toc" c:identifier="gst_message_new_toc">
<doc xml:space="preserve">Create a new TOC message. The message is posted by elements
that discovered or updated a TOC.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new TOC message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">#GstToc structure for the message.</doc>
<type name="Toc" c:type="GstToc*"/>
</parameter>
<parameter name="updated" transfer-ownership="none">
<doc xml:space="preserve">whether TOC was updated or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_warning" c:identifier="gst_message_new_warning">
<doc xml:space="preserve">Create a new warning message. The message will make copies of @error and
@debug.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new warning message.
MT safe.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_warning_with_details" c:identifier="gst_message_new_warning_with_details" version="1.10">
<doc xml:space="preserve">Create a new warning message. The message will make copies of @error and
@debug.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new warning message.</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The object originating the message.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">The GError for this message.</doc>
<type name="GLib.Error" c:type="GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none">
<doc xml:space="preserve">A debugging string.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="details" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">A GstStructure with details</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<method name="add_redirect_entry" c:identifier="gst_message_add_redirect_entry" version="1.10">
<doc xml:space="preserve">Creates and appends a new entry.
The specified location string is copied. However, ownership over the tag
list and structure are transferred to the message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_REDIRECT</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="location" transfer-ownership="none">
<doc xml:space="preserve">location string for the new entry</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag_list" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">tag list for the new entry</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
<parameter name="entry_struct" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">structure for the new entry</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_message_copy" introspectable="0">
<doc xml:space="preserve">Creates a copy of the message. Returns a copy of the message.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @msg.
MT safe</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="msg" transfer-ownership="none">
<doc xml:space="preserve">the message to copy</doc>
<type name="Message" c:type="const GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_num_redirect_entries" c:identifier="gst_message_get_num_redirect_entries" version="1.10">
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of entries stored in the message</doc>
<type name="gsize" c:type="gsize"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_REDIRECT</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_seqnum" c:identifier="gst_message_get_seqnum">
<doc xml:space="preserve">Retrieve the sequence number of a message.
Messages have ever-incrementing sequence numbers, which may also be set
explicitly via gst_message_set_seqnum(). Sequence numbers are typically used
to indicate that a message corresponds to some other set of messages or
events, for example a SEGMENT_DONE message corresponding to a SEEK event. It
is considered good practice to make this correspondence when possible, though
it is not required.
Note that events and messages share the same sequence number incrementor;
two events or messages will never have the same sequence number unless
that correspondence was made explicitly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The message's sequence number.
MT safe.</doc>
<type name="guint32" c:type="guint32"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A #GstMessage.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream_status_object" c:identifier="gst_message_get_stream_status_object">
<doc xml:space="preserve">Extracts the object managing the streaming thread from @message.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a GValue containing the object that manages the
streaming thread. This object is usually of type GstTask but other types can
be added in the future. The object remains valid as long as @message is
valid.</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STREAM_STATUS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_structure" c:identifier="gst_message_get_structure">
<doc xml:space="preserve">Access the structure of the message.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The structure of the message. The
structure is still owned by the message, which means that you should not
free it and that the pointer becomes invalid when you free the message.
MT safe.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The #GstMessage.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_name" c:identifier="gst_message_has_name">
<doc xml:space="preserve">Checks if @message has the given @name. This function is usually used to
check the name of a custom message.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @name matches the name of the message structure.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The #GstMessage.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name to check</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="parse_async_done" c:identifier="gst_message_parse_async_done">
<doc xml:space="preserve">Extract the running_time from the async_done message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_ASYNC_DONE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the running_time or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_buffering" c:identifier="gst_message_parse_buffering">
<doc xml:space="preserve">Extracts the buffering percent from the GstMessage. see also
gst_message_new_buffering().
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_BUFFERING.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="percent" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Return location for the percent.</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="parse_buffering_stats" c:identifier="gst_message_parse_buffering_stats">
<doc xml:space="preserve">Extracts the buffering stats values from @message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_BUFFERING.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="mode" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a buffering mode, or %NULL</doc>
<type name="BufferingMode" c:type="GstBufferingMode*"/>
</parameter>
<parameter name="avg_in" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the average input rate, or %NULL</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="avg_out" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the average output rate, or %NULL</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="buffering_left" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">amount of buffering time left in
milliseconds, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_clock_lost" c:identifier="gst_message_parse_clock_lost">
<doc xml:space="preserve">Extracts the lost clock from the GstMessage.
The clock object returned remains valid until the message is freed.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_CLOCK_LOST.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="clock" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to hold the lost clock</doc>
<type name="Clock" c:type="GstClock**"/>
</parameter>
</parameters>
</method>
<method name="parse_clock_provide" c:identifier="gst_message_parse_clock_provide">
<doc xml:space="preserve">Extracts the clock and ready flag from the GstMessage.
The clock object returned remains valid until the message is freed.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_CLOCK_PROVIDE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="clock" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to hold a clock
object, or %NULL</doc>
<type name="Clock" c:type="GstClock**"/>
</parameter>
<parameter name="ready" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to hold the ready flag, or %NULL</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_context_type" c:identifier="gst_message_parse_context_type" version="1.2">
<doc xml:space="preserve">Parse a context type from an existing GST_MESSAGE_NEED_CONTEXT message.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #gboolean indicating if the parsing succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a GST_MESSAGE_NEED_CONTEXT type message</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="context_type" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">the context type, or %NULL</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_device_added" c:identifier="gst_message_parse_device_added" version="1.4">
<doc xml:space="preserve">Parses a device-added message. The device-added message is produced by
#GstDeviceProvider or a #GstDeviceMonitor. It announces the appearance
of monitored devices.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_DEVICE_ADDED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="device" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the new #GstDevice, or %NULL</doc>
<type name="Device" c:type="GstDevice**"/>
</parameter>
</parameters>
</method>
<method name="parse_device_changed" c:identifier="gst_message_parse_device_changed" version="1.16">
<doc xml:space="preserve">Parses a device-changed message. The device-changed message is produced by
#GstDeviceProvider or a #GstDeviceMonitor. It announces the
disappearance of monitored devices. * It announce that a device properties has
changed and @device represents the new modified version of @changed_device.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_DEVICE_CHANGED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="device" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the updated version of the #GstDevice, or %NULL</doc>
<type name="Device" c:type="GstDevice**"/>
</parameter>
<parameter name="changed_device" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the old version of the #GstDevice, or %NULL</doc>
<type name="Device" c:type="GstDevice**"/>
</parameter>
</parameters>
</method>
<method name="parse_device_removed" c:identifier="gst_message_parse_device_removed" version="1.4">
<doc xml:space="preserve">Parses a device-removed message. The device-removed message is produced by
#GstDeviceProvider or a #GstDeviceMonitor. It announces the
disappearance of monitored devices.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_DEVICE_REMOVED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="device" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the removed #GstDevice, or %NULL</doc>
<type name="Device" c:type="GstDevice**"/>
</parameter>
</parameters>
</method>
<method name="parse_error" c:identifier="gst_message_parse_error">
<doc xml:space="preserve">Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.
Typical usage of this function might be:
|[&lt;!-- language="C" --&gt;
...
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_ERROR: {
GError *err = NULL;
gchar *dbg_info = NULL;
gst_message_parse_error (msg, &amp;amp;err, &amp;amp;dbg_info);
g_printerr ("ERROR from element %s: %s\n",
GST_OBJECT_NAME (msg-&gt;src), err-&gt;message);
g_printerr ("Debugging info: %s\n", (dbg_info) ? dbg_info : "none");
g_error_free (err);
g_free (dbg_info);
break;
}
...
}
...
]|
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_ERROR.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="gerror" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the GError</doc>
<type name="GLib.Error" c:type="GError**"/>
</parameter>
<parameter name="debug" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the debug message,
or %NULL</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_error_details" c:identifier="gst_message_parse_error_details" version="1.10">
<doc xml:space="preserve">Returns the optional details structure, may be NULL if none.
The returned structure must not be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The message object</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="structure" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the returned details</doc>
<type name="Structure" c:type="const GstStructure**"/>
</parameter>
</parameters>
</method>
<method name="parse_group_id" c:identifier="gst_message_parse_group_id" version="1.2">
<doc xml:space="preserve">Extract the group from the STREAM_START message.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the message had a group id set, %FALSE otherwise
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STREAM_START.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="group_id" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the group id or
%NULL</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_have_context" c:identifier="gst_message_parse_have_context" version="1.2">
<doc xml:space="preserve">Extract the context from the HAVE_CONTEXT message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_HAVE_CONTEXT.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="context" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the
context or %NULL</doc>
<type name="Context" c:type="GstContext**"/>
</parameter>
</parameters>
</method>
<method name="parse_info" c:identifier="gst_message_parse_info">
<doc xml:space="preserve">Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_INFO.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="gerror" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the GError</doc>
<type name="GLib.Error" c:type="GError**"/>
</parameter>
<parameter name="debug" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the debug message,
or %NULL</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_info_details" c:identifier="gst_message_parse_info_details" version="1.10">
<doc xml:space="preserve">Returns the optional details structure, may be NULL if none
The returned structure must not be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The message object</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="structure" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the returned details structure</doc>
<type name="Structure" c:type="const GstStructure**"/>
</parameter>
</parameters>
</method>
<method name="parse_instant_rate_request" c:identifier="gst_message_parse_instant_rate_request" version="1.18">
<doc xml:space="preserve">Parses the rate_multiplier from the instant-rate-request message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_INSTANT_RATE_REQUEST</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="rate_multiplier" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">return location for the rate, or %NULL</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="parse_new_clock" c:identifier="gst_message_parse_new_clock">
<doc xml:space="preserve">Extracts the new clock from the GstMessage.
The clock object returned remains valid until the message is freed.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_NEW_CLOCK.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="clock" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to hold the selected
new clock</doc>
<type name="Clock" c:type="GstClock**"/>
</parameter>
</parameters>
</method>
<method name="parse_progress" c:identifier="gst_message_parse_progress">
<doc xml:space="preserve">Parses the progress @type, @code and @text.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_PROGRESS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="type" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the type</doc>
<type name="ProgressType" c:type="GstProgressType*"/>
</parameter>
<parameter name="code" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the code</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
<parameter name="text" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the text</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_property_notify" c:identifier="gst_message_parse_property_notify" version="1.10">
<doc xml:space="preserve">Parses a property-notify message. These will be posted on the bus only
when set up with gst_element_add_property_notify_watch() or
gst_element_add_property_deep_notify_watch().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_PROPERTY_NOTIFY</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="object" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">location where to store a
pointer to the object whose property got changed, or %NULL</doc>
<type name="Object" c:type="GstObject**"/>
</parameter>
<parameter name="property_name" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">return location for
the name of the property that got changed, or %NULL</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
<parameter name="property_value" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">return location for
the new value of the property that got changed, or %NULL. This will
only be set if the property notify watch was told to include the value
when it was set up</doc>
<type name="GObject.Value" c:type="const GValue**"/>
</parameter>
</parameters>
</method>
<method name="parse_qos" c:identifier="gst_message_parse_qos">
<doc xml:space="preserve">Extract the timestamps and live status from the QoS message.
The returned values give the running_time, stream_time, timestamp and
duration of the dropped buffer. Values of GST_CLOCK_TIME_NONE mean unknown
values.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_QOS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="live" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">if the message was generated by a live element</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the running time of the buffer that
generated the message</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="stream_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the stream time of the buffer that
generated the message</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="timestamp" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the timestamps of the buffer that
generated the message</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the duration of the buffer that
generated the message</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_qos_stats" c:identifier="gst_message_parse_qos_stats">
<doc xml:space="preserve">Extract the QoS stats representing the history of the current continuous
pipeline playback period.
When @format is @GST_FORMAT_UNDEFINED both @dropped and @processed are
invalid. Values of -1 for either @processed or @dropped mean unknown values.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_QOS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Units of the 'processed' and 'dropped' fields.
Video sinks and video filters will use GST_FORMAT_BUFFERS (frames).
Audio sinks and audio filters will likely use GST_FORMAT_DEFAULT
(samples).</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="processed" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Total number of units correctly processed
since the last state change to READY or a flushing operation.</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="dropped" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Total number of units dropped since the last
state change to READY or a flushing operation.</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_qos_values" c:identifier="gst_message_parse_qos_values">
<doc xml:space="preserve">Extract the QoS values that have been calculated/analysed from the QoS data
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_QOS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="jitter" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">The difference of the running-time against
the deadline.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="proportion" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Long term prediction of the ideal rate
relative to normal rate to get optimal quality.</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="quality" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">An element dependent integer value that
specifies the current quality level of the element. The default
maximum quality is 1000000.</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="parse_redirect_entry" c:identifier="gst_message_parse_redirect_entry" version="1.10">
<doc xml:space="preserve">Parses the location and/or structure from the entry with the given index.
The index must be between 0 and gst_message_get_num_redirect_entries() - 1.
Returned pointers are valid for as long as this message exists.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_REDIRECT</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="entry_index" transfer-ownership="none">
<doc xml:space="preserve">index of the entry to parse</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="location" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">return location for
the pointer to the entry's location string, or %NULL</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
<parameter name="tag_list" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">return location for
the pointer to the entry's tag list, or %NULL</doc>
<type name="TagList" c:type="GstTagList**"/>
</parameter>
<parameter name="entry_struct" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">return location
for the pointer to the entry's structure, or %NULL</doc>
<type name="Structure" c:type="const GstStructure**"/>
</parameter>
</parameters>
</method>
<method name="parse_request_state" c:identifier="gst_message_parse_request_state">
<doc xml:space="preserve">Extract the requested state from the request_state message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_REQUEST_STATE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="state" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the requested state or %NULL</doc>
<type name="State" c:type="GstState*"/>
</parameter>
</parameters>
</method>
<method name="parse_reset_time" c:identifier="gst_message_parse_reset_time">
<doc xml:space="preserve">Extract the running-time from the RESET_TIME message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_RESET_TIME.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the running_time or
%NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_segment_done" c:identifier="gst_message_parse_segment_done">
<doc xml:space="preserve">Extracts the position and format from the segment done message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_SEGMENT_DONE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the format, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="position" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the position, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_segment_start" c:identifier="gst_message_parse_segment_start">
<doc xml:space="preserve">Extracts the position and format from the segment start message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_SEGMENT_START.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the format, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="position" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Result location for the position, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_state_changed" c:identifier="gst_message_parse_state_changed">
<doc xml:space="preserve">Extracts the old and new states from the GstMessage.
Typical usage of this function might be:
|[&lt;!-- language="C" --&gt;
...
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_STATE_CHANGED: {
GstState old_state, new_state;
gst_message_parse_state_changed (msg, &amp;amp;old_state, &amp;amp;new_state, NULL);
g_print ("Element %s changed state from %s to %s.\n",
GST_OBJECT_NAME (msg-&gt;src),
gst_element_state_get_name (old_state),
gst_element_state_get_name (new_state));
break;
}
...
}
...
]|
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a valid #GstMessage of type GST_MESSAGE_STATE_CHANGED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="oldstate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the previous state, or %NULL</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="newstate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the new (current) state, or %NULL</doc>
<type name="State" c:type="GstState*"/>
</parameter>
<parameter name="pending" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the pending (target) state, or %NULL</doc>
<type name="State" c:type="GstState*"/>
</parameter>
</parameters>
</method>
<method name="parse_step_done" c:identifier="gst_message_parse_step_done">
<doc xml:space="preserve">Extract the values the step_done message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STEP_DONE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the format</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="amount" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the amount</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="rate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the rate</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="flush" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the flush flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="intermediate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the intermediate flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the duration</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="eos" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the EOS flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_step_start" c:identifier="gst_message_parse_step_start">
<doc xml:space="preserve">Extract the values from step_start message.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STEP_DONE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="active" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the active flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the format</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="amount" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the amount</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="rate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the rate</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="flush" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the flush flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="intermediate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result location for the intermediate flag</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_collection" c:identifier="gst_message_parse_stream_collection" version="1.10">
<doc xml:space="preserve">Parses a stream-collection message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_STREAM_COLLECTION</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="collection" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the #GstStreamCollection, or %NULL</doc>
<type name="StreamCollection" c:type="GstStreamCollection**"/>
</parameter>
</parameters>
</method>
<method name="parse_stream_status" c:identifier="gst_message_parse_stream_status">
<doc xml:space="preserve">Extracts the stream status type and owner the GstMessage. The returned
owner remains valid for as long as the reference to @message is valid and
should thus not be unreffed.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STREAM_STATUS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="type" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to hold the status type</doc>
<type name="StreamStatusType" c:type="GstStreamStatusType*"/>
</parameter>
<parameter name="owner" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">The owner element of the message source</doc>
<type name="Element" c:type="GstElement**"/>
</parameter>
</parameters>
</method>
<method name="parse_streams_selected" c:identifier="gst_message_parse_streams_selected" version="1.10">
<doc xml:space="preserve">Parses a streams-selected message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_STREAMS_SELECTED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="collection" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location where to store a
pointer to the #GstStreamCollection, or %NULL</doc>
<type name="StreamCollection" c:type="GstStreamCollection**"/>
</parameter>
</parameters>
</method>
<method name="parse_structure_change" c:identifier="gst_message_parse_structure_change">
<doc xml:space="preserve">Extracts the change type and completion status from the GstMessage.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STRUCTURE_CHANGE.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="type" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">A pointer to hold the change type</doc>
<type name="StructureChangeType" c:type="GstStructureChangeType*"/>
</parameter>
<parameter name="owner" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">The owner element of the
message source</doc>
<type name="Element" c:type="GstElement**"/>
</parameter>
<parameter name="busy" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to hold whether the change is in
progress or has been completed</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_tag" c:identifier="gst_message_parse_tag">
<doc xml:space="preserve">Extracts the tag list from the GstMessage. The tag list returned in the
output argument is a copy; the caller must free it when done.
Typical usage of this function might be:
|[&lt;!-- language="C" --&gt;
...
switch (GST_MESSAGE_TYPE (msg)) {
case GST_MESSAGE_TAG: {
GstTagList *tags = NULL;
gst_message_parse_tag (msg, &amp;amp;tags);
g_print ("Got tags from element %s\n", GST_OBJECT_NAME (msg-&gt;src));
handle_tags (tags);
gst_tag_list_unref (tags);
break;
}
...
}
...
]|
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_TAG.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="tag_list" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">return location for the tag-list.</doc>
<type name="TagList" c:type="GstTagList**"/>
</parameter>
</parameters>
</method>
<method name="parse_toc" c:identifier="gst_message_parse_toc">
<doc xml:space="preserve">Extract the TOC from the #GstMessage. The TOC returned in the
output argument is a copy; the caller must free it with
gst_toc_unref() when done.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a valid #GstMessage of type GST_MESSAGE_TOC.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="toc" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">return location for the TOC.</doc>
<type name="Toc" c:type="GstToc**"/>
</parameter>
<parameter name="updated" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">return location for the updated flag.</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_warning" c:identifier="gst_message_parse_warning">
<doc xml:space="preserve">Extracts the GError and debug string from the GstMessage. The values returned
in the output arguments are copies; the caller must free them when done.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_WARNING.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="gerror" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the GError</doc>
<type name="GLib.Error" c:type="GError**"/>
</parameter>
<parameter name="debug" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the debug message,
or %NULL</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_warning_details" c:identifier="gst_message_parse_warning_details" version="1.10">
<doc xml:space="preserve">Returns the optional details structure, may be NULL if none
The returned structure must not be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The message object</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="structure" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the returned details structure</doc>
<type name="Structure" c:type="const GstStructure**"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_message_ref" introspectable="0">
<doc xml:space="preserve">Convenience macro to increase the reference count of the message.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@msg (for convenience when doing assignments)</doc>
<type name="Message" c:type="GstMessage*"/>
</return-value>
<parameters>
<instance-parameter name="msg" transfer-ownership="none">
<doc xml:space="preserve">the message to ref</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_buffering_stats" c:identifier="gst_message_set_buffering_stats">
<doc xml:space="preserve">Configures the buffering stats values in @message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_BUFFERING.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">a buffering mode</doc>
<type name="BufferingMode" c:type="GstBufferingMode"/>
</parameter>
<parameter name="avg_in" transfer-ownership="none">
<doc xml:space="preserve">the average input rate</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="avg_out" transfer-ownership="none">
<doc xml:space="preserve">the average output rate</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="buffering_left" transfer-ownership="none">
<doc xml:space="preserve">amount of buffering time left in milliseconds</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_group_id" c:identifier="gst_message_set_group_id" version="1.2">
<doc xml:space="preserve">Sets the group id on the stream-start message.
All streams that have the same group id are supposed to be played
together, i.e. all streams inside a container file should have the
same group id but different stream ids. The group id should change
each time the stream is started, resulting in different group ids
each time a file is played for example.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the message</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="group_id" transfer-ownership="none">
<doc xml:space="preserve">the group id</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_qos_stats" c:identifier="gst_message_set_qos_stats">
<doc xml:space="preserve">Set the QoS stats representing the history of the current continuous pipeline
playback period.
When @format is @GST_FORMAT_UNDEFINED both @dropped and @processed are
invalid. Values of -1 for either @processed or @dropped mean unknown values.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_QOS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">Units of the 'processed' and 'dropped' fields. Video sinks and video
filters will use GST_FORMAT_BUFFERS (frames). Audio sinks and audio filters
will likely use GST_FORMAT_DEFAULT (samples).</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="processed" transfer-ownership="none">
<doc xml:space="preserve">Total number of units correctly processed since the last state
change to READY or a flushing operation.</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="dropped" transfer-ownership="none">
<doc xml:space="preserve">Total number of units dropped since the last state change to READY
or a flushing operation.</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="set_qos_values" c:identifier="gst_message_set_qos_values">
<doc xml:space="preserve">Set the QoS values that have been calculated/analysed from the QoS data
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_QOS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="jitter" transfer-ownership="none">
<doc xml:space="preserve">The difference of the running-time against the deadline.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="proportion" transfer-ownership="none">
<doc xml:space="preserve">Long term prediction of the ideal rate relative to normal rate
to get optimal quality.</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="quality" transfer-ownership="none">
<doc xml:space="preserve">An element dependent integer value that specifies the current
quality level of the element. The default maximum quality is 1000000.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="set_seqnum" c:identifier="gst_message_set_seqnum">
<doc xml:space="preserve">Set the sequence number of a message.
This function might be called by the creator of a message to indicate that
the message relates to other messages or events. See gst_message_get_seqnum()
for more information.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A #GstMessage.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="seqnum" transfer-ownership="none">
<doc xml:space="preserve">A sequence number.</doc>
<type name="guint32" c:type="guint32"/>
</parameter>
</parameters>
</method>
<method name="set_stream_status_object" c:identifier="gst_message_set_stream_status_object">
<doc xml:space="preserve">Configures the object handling the streaming thread. This is usually a
GstTask object but other objects might be added in the future.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstMessage of type GST_MESSAGE_STREAM_STATUS.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object controlling the streaming</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="streams_selected_add" c:identifier="gst_message_streams_selected_add" version="1.10">
<doc xml:space="preserve">Adds the @stream to the @message.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_STREAMS_SELECTED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream to add to @message</doc>
<type name="Stream" c:type="GstStream*"/>
</parameter>
</parameters>
</method>
<method name="streams_selected_get_size" c:identifier="gst_message_streams_selected_get_size" version="1.10">
<doc xml:space="preserve">Returns the number of streams contained in the @message.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of streams contained within.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_STREAMS_SELECTED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="streams_selected_get_stream" c:identifier="gst_message_streams_selected_get_stream" version="1.10">
<doc xml:space="preserve">Retrieves the #GstStream with index @index from the @message.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">a #GstMessage of type %GST_MESSAGE_STREAMS_SELECTED</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">Index of the stream to retrieve</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_message_unref" introspectable="0">
<doc xml:space="preserve">Convenience macro to decrease the reference count of the message, possibly
freeing it.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="msg" transfer-ownership="none">
<doc xml:space="preserve">the message to unref</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<method name="writable_structure" c:identifier="gst_message_writable_structure" version="1.14">
<doc xml:space="preserve">Get a writable version of the structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The structure of the message. The structure
is still owned by the message, which means that you should not free
it and that the pointer becomes invalid when you free the message.
This function checks if @message is writable and will never return
%NULL.
MT safe.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">The #GstMessage.</doc>
<type name="Message" c:type="GstMessage*"/>
</instance-parameter>
</parameters>
</method>
<function name="replace" c:identifier="gst_message_replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstMessage to point to a different #GstMessage. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
message is unreffed, the new one is reffed).
Either @new_message or the #GstMessage pointed to by @old_message may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_message was different from @old_message</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_message" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstMessage to be replaced.</doc>
<type name="Message" c:type="GstMessage**"/>
</parameter>
<parameter name="new_message" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstMessage that will
replace the message pointed to by @old_message.</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</function>
</record>
<bitfield name="MessageType" glib:type-name="GstMessageType" glib:get-type="gst_message_type_get_type" c:type="GstMessageType">
<doc xml:space="preserve">The different message types that are available.</doc>
<member name="unknown" value="0" c:identifier="GST_MESSAGE_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">an undefined message</doc>
</member>
<member name="eos" value="1" c:identifier="GST_MESSAGE_EOS" glib:nick="eos">
<doc xml:space="preserve">end-of-stream reached in a pipeline. The application will
only receive this message in the PLAYING state and every time it sets a
pipeline to PLAYING that is in the EOS state. The application can perform a
flushing seek in the pipeline, which will undo the EOS state again.</doc>
</member>
<member name="error" value="2" c:identifier="GST_MESSAGE_ERROR" glib:nick="error">
<doc xml:space="preserve">an error occurred. When the application receives an error
message it should stop playback of the pipeline and not assume that more
data will be played. It is possible to specify a redirection url to the error
messages by setting a `redirect-location` field into the error message, application
or high level bins might use the information as required.</doc>
</member>
<member name="warning" value="4" c:identifier="GST_MESSAGE_WARNING" glib:nick="warning">
<doc xml:space="preserve">a warning occurred.</doc>
</member>
<member name="info" value="8" c:identifier="GST_MESSAGE_INFO" glib:nick="info">
<doc xml:space="preserve">an info message occurred</doc>
</member>
<member name="tag" value="16" c:identifier="GST_MESSAGE_TAG" glib:nick="tag">
<doc xml:space="preserve">a tag was found.</doc>
</member>
<member name="buffering" value="32" c:identifier="GST_MESSAGE_BUFFERING" glib:nick="buffering">
<doc xml:space="preserve">the pipeline is buffering. When the application
receives a buffering message in the PLAYING state for a non-live pipeline it
must PAUSE the pipeline until the buffering completes, when the percentage
field in the message is 100%. For live pipelines, no action must be
performed and the buffering percentage can be used to inform the user about
the progress.</doc>
</member>
<member name="state_changed" value="64" c:identifier="GST_MESSAGE_STATE_CHANGED" glib:nick="state-changed">
<doc xml:space="preserve">a state change happened</doc>
</member>
<member name="state_dirty" value="128" c:identifier="GST_MESSAGE_STATE_DIRTY" glib:nick="state-dirty">
<doc xml:space="preserve">an element changed state in a streaming thread.
This message is deprecated.</doc>
</member>
<member name="step_done" value="256" c:identifier="GST_MESSAGE_STEP_DONE" glib:nick="step-done">
<doc xml:space="preserve">a stepping operation finished.</doc>
</member>
<member name="clock_provide" value="512" c:identifier="GST_MESSAGE_CLOCK_PROVIDE" glib:nick="clock-provide">
<doc xml:space="preserve">an element notifies its capability of providing
a clock. This message is used internally and
never forwarded to the application.</doc>
</member>
<member name="clock_lost" value="1024" c:identifier="GST_MESSAGE_CLOCK_LOST" glib:nick="clock-lost">
<doc xml:space="preserve">The current clock as selected by the pipeline became
unusable. The pipeline will select a new clock on
the next PLAYING state change. The application
should set the pipeline to PAUSED and back to
PLAYING when this message is received.</doc>
</member>
<member name="new_clock" value="2048" c:identifier="GST_MESSAGE_NEW_CLOCK" glib:nick="new-clock">
<doc xml:space="preserve">a new clock was selected in the pipeline.</doc>
</member>
<member name="structure_change" value="4096" c:identifier="GST_MESSAGE_STRUCTURE_CHANGE" glib:nick="structure-change">
<doc xml:space="preserve">the structure of the pipeline changed. This
message is used internally and never forwarded to the application.</doc>
</member>
<member name="stream_status" value="8192" c:identifier="GST_MESSAGE_STREAM_STATUS" glib:nick="stream-status">
<doc xml:space="preserve">status about a stream, emitted when it starts,
stops, errors, etc..</doc>
</member>
<member name="application" value="16384" c:identifier="GST_MESSAGE_APPLICATION" glib:nick="application">
<doc xml:space="preserve">message posted by the application, possibly
via an application-specific element.</doc>
</member>
<member name="element" value="32768" c:identifier="GST_MESSAGE_ELEMENT" glib:nick="element">
<doc xml:space="preserve">element-specific message, see the specific element's
documentation</doc>
</member>
<member name="segment_start" value="65536" c:identifier="GST_MESSAGE_SEGMENT_START" glib:nick="segment-start">
<doc xml:space="preserve">pipeline started playback of a segment. This
message is used internally and never forwarded to the application.</doc>
</member>
<member name="segment_done" value="131072" c:identifier="GST_MESSAGE_SEGMENT_DONE" glib:nick="segment-done">
<doc xml:space="preserve">pipeline completed playback of a segment. This
message is forwarded to the application after all elements that posted
@GST_MESSAGE_SEGMENT_START posted a GST_MESSAGE_SEGMENT_DONE message.</doc>
</member>
<member name="duration_changed" value="262144" c:identifier="GST_MESSAGE_DURATION_CHANGED" glib:nick="duration-changed">
<doc xml:space="preserve">The duration of a pipeline changed. The
application can get the new duration with a duration query.</doc>
</member>
<member name="latency" value="524288" c:identifier="GST_MESSAGE_LATENCY" glib:nick="latency">
<doc xml:space="preserve">Posted by elements when their latency changes. The
application should recalculate and distribute a new latency.</doc>
</member>
<member name="async_start" value="1048576" c:identifier="GST_MESSAGE_ASYNC_START" glib:nick="async-start">
<doc xml:space="preserve">Posted by elements when they start an ASYNC
#GstStateChange. This message is not forwarded to the application but is used
internally.</doc>
</member>
<member name="async_done" value="2097152" c:identifier="GST_MESSAGE_ASYNC_DONE" glib:nick="async-done">
<doc xml:space="preserve">Posted by elements when they complete an ASYNC
#GstStateChange. The application will only receive this message from the toplevel
pipeline.</doc>
</member>
<member name="request_state" value="4194304" c:identifier="GST_MESSAGE_REQUEST_STATE" glib:nick="request-state">
<doc xml:space="preserve">Posted by elements when they want the pipeline to
change state. This message is a suggestion to the application which can
decide to perform the state change on (part of) the pipeline.</doc>
</member>
<member name="step_start" value="8388608" c:identifier="GST_MESSAGE_STEP_START" glib:nick="step-start">
<doc xml:space="preserve">A stepping operation was started.</doc>
</member>
<member name="qos" value="16777216" c:identifier="GST_MESSAGE_QOS" glib:nick="qos">
<doc xml:space="preserve">A buffer was dropped or an element changed its processing
strategy for Quality of Service reasons.</doc>
</member>
<member name="progress" value="33554432" c:identifier="GST_MESSAGE_PROGRESS" glib:nick="progress">
<doc xml:space="preserve">A progress message.</doc>
</member>
<member name="toc" value="67108864" c:identifier="GST_MESSAGE_TOC" glib:nick="toc">
<doc xml:space="preserve">A new table of contents (TOC) was found or previously found TOC
was updated.</doc>
</member>
<member name="reset_time" value="134217728" c:identifier="GST_MESSAGE_RESET_TIME" glib:nick="reset-time">
<doc xml:space="preserve">Message to request resetting the pipeline's
running time from the pipeline. This is an internal message which
applications will likely never receive.</doc>
</member>
<member name="stream_start" value="268435456" c:identifier="GST_MESSAGE_STREAM_START" glib:nick="stream-start">
<doc xml:space="preserve">Message indicating start of a new stream. Useful
e.g. when using playbin in gapless playback mode, to get notified when
the next title actually starts playing (which will be some time after
the URI for the next title has been set).</doc>
</member>
<member name="need_context" value="536870912" c:identifier="GST_MESSAGE_NEED_CONTEXT" glib:nick="need-context">
<doc xml:space="preserve">Message indicating that an element wants a specific context (Since: 1.2)</doc>
</member>
<member name="have_context" value="1073741824" c:identifier="GST_MESSAGE_HAVE_CONTEXT" glib:nick="have-context">
<doc xml:space="preserve">Message indicating that an element created a context (Since: 1.2)</doc>
</member>
<member name="extended" value="2147483648" c:identifier="GST_MESSAGE_EXTENDED" glib:nick="extended">
<doc xml:space="preserve">Message is an extended message type (see below).
These extended message IDs can't be used directly with mask-based API
like gst_bus_poll() or gst_bus_timed_pop_filtered(), but you can still
filter for GST_MESSAGE_EXTENDED and then check the result for the
specific type. (Since: 1.4)</doc>
</member>
<member name="device_added" value="2147483649" c:identifier="GST_MESSAGE_DEVICE_ADDED" glib:nick="device-added">
<doc xml:space="preserve">Message indicating a #GstDevice was added to
a #GstDeviceProvider (Since: 1.4)</doc>
</member>
<member name="device_removed" value="2147483650" c:identifier="GST_MESSAGE_DEVICE_REMOVED" glib:nick="device-removed">
<doc xml:space="preserve">Message indicating a #GstDevice was removed
from a #GstDeviceProvider (Since: 1.4)</doc>
</member>
<member name="property_notify" value="2147483651" c:identifier="GST_MESSAGE_PROPERTY_NOTIFY" glib:nick="property-notify">
<doc xml:space="preserve">Message indicating a #GObject property has
changed (Since: 1.10)</doc>
</member>
<member name="stream_collection" value="2147483652" c:identifier="GST_MESSAGE_STREAM_COLLECTION" glib:nick="stream-collection">
<doc xml:space="preserve">Message indicating a new #GstStreamCollection
is available (Since: 1.10)</doc>
</member>
<member name="streams_selected" value="2147483653" c:identifier="GST_MESSAGE_STREAMS_SELECTED" glib:nick="streams-selected">
<doc xml:space="preserve">Message indicating the active selection of
#GstStreams has changed (Since: 1.10)</doc>
</member>
<member name="redirect" value="2147483654" c:identifier="GST_MESSAGE_REDIRECT" glib:nick="redirect">
<doc xml:space="preserve">Message indicating to request the application to
try to play the given URL(s). Useful if for example a HTTP 302/303
response is received with a non-HTTP URL inside. (Since: 1.10)</doc>
</member>
<member name="device_changed" value="2147483655" c:identifier="GST_MESSAGE_DEVICE_CHANGED" glib:nick="device-changed">
<doc xml:space="preserve">Message indicating a #GstDevice was changed
a #GstDeviceProvider (Since: 1.16)</doc>
</member>
<member name="instant_rate_request" value="2147483656" c:identifier="GST_MESSAGE_INSTANT_RATE_REQUEST" glib:nick="instant-rate-request">
<doc xml:space="preserve">Message sent by elements to request the
running time from the pipeline when an instant rate change should
be applied (which may be in the past when the answer arrives). (Since: 1.18)</doc>
</member>
<member name="any" value="4294967295" c:identifier="GST_MESSAGE_ANY" glib:nick="any">
<doc xml:space="preserve">mask for all of the above messages.</doc>
</member>
<function name="get_name" c:identifier="gst_message_type_get_name">
<doc xml:space="preserve">Get a printable name for the given message type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the message.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the message type</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</function>
<function name="to_quark" c:identifier="gst_message_type_to_quark">
<doc xml:space="preserve">Get the unique quark for the given message type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the message type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the message type</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</function>
</bitfield>
<record name="Meta" c:type="GstMeta">
<doc xml:space="preserve">The #GstMeta structure should be included as the first member of a #GstBuffer
metadata structure. The structure defines the API of the metadata and should
be accessible to all elements using the metadata.
A metadata API is registered with gst_meta_api_type_register() which takes a
name for the metadata API and some tags associated with the metadata.
With gst_meta_api_type_has_tag() one can check if a certain metadata API
contains a given tag.
Multiple implementations of a metadata API can be registered.
To implement a metadata API, gst_meta_register() should be used. This
function takes all parameters needed to create, free and transform metadata
along with the size of the metadata. The function returns a #GstMetaInfo
structure that contains the information for the implementation of the API.
A specific implementation can be retrieved by name with gst_meta_get_info().
See #GstBuffer for how the metadata can be added, retrieved and removed from
buffers.</doc>
<field name="flags" writable="1">
<doc xml:space="preserve">extra flags for the metadata</doc>
<type name="MetaFlags" c:type="GstMetaFlags"/>
</field>
<field name="info" writable="1">
<doc xml:space="preserve">pointer to the #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</field>
<method name="compare_seqnum" c:identifier="gst_meta_compare_seqnum" version="1.16">
<doc xml:space="preserve">Meta sequence number compare function. Can be used as #GCompareFunc
or a #GCompareDataFunc.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a negative number if @meta1 comes before @meta2, 0 if both metas
have an equal sequence number, or a positive integer if @meta1 comes
after @meta2.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="meta1" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="const GstMeta*"/>
</instance-parameter>
<parameter name="meta2" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="const GstMeta*"/>
</parameter>
</parameters>
</method>
<method name="get_seqnum" c:identifier="gst_meta_get_seqnum" version="1.16">
<doc xml:space="preserve">Gets seqnum for this meta.</doc>
<return-value transfer-ownership="none">
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="meta" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="const GstMeta*"/>
</instance-parameter>
</parameters>
</method>
<function name="api_type_get_tags" c:identifier="gst_meta_api_type_get_tags" version="1.2">
<return-value transfer-ownership="none">
<doc xml:space="preserve">an array of tags as strings.</doc>
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<function name="api_type_has_tag" c:identifier="gst_meta_api_type_has_tag">
<doc xml:space="preserve">Check if @api was registered with @tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @api was registered with @tag.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag to check</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</function>
<function name="api_type_register" c:identifier="gst_meta_api_type_register">
<doc xml:space="preserve">Register and return a GType for the @api and associate it with
@tags.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a unique GType for @api.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API to register</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tags" transfer-ownership="none">
<doc xml:space="preserve">tags for @api</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</function>
<function name="get_info" c:identifier="gst_meta_get_info">
<doc xml:space="preserve">Lookup a previously registered meta info structure by its implementation name
@impl.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #GstMetaInfo with @impl, or
%NULL when no such metainfo exists.</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
<parameters>
<parameter name="impl" transfer-ownership="none">
<doc xml:space="preserve">the name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="register" c:identifier="gst_meta_register">
<doc xml:space="preserve">Register a new #GstMeta implementation.
The same @info can be retrieved later with gst_meta_get_info() by using
@impl as the key.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #GstMetaInfo that can be used to
access metadata.</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">the type of the #GstMeta API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="impl" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstMeta implementation</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of the #GstMeta structure</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="init_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaInitFunction</doc>
<type name="MetaInitFunction" c:type="GstMetaInitFunction"/>
</parameter>
<parameter name="free_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaFreeFunction</doc>
<type name="MetaFreeFunction" c:type="GstMetaFreeFunction"/>
</parameter>
<parameter name="transform_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaTransformFunction</doc>
<type name="MetaTransformFunction" c:type="GstMetaTransformFunction"/>
</parameter>
</parameters>
</function>
</record>
<bitfield name="MetaFlags" glib:type-name="GstMetaFlags" glib:get-type="gst_meta_flags_get_type" c:type="GstMetaFlags">
<doc xml:space="preserve">Extra metadata flags.</doc>
<member name="none" value="0" c:identifier="GST_META_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">no flags</doc>
</member>
<member name="readonly" value="1" c:identifier="GST_META_FLAG_READONLY" glib:nick="readonly">
<doc xml:space="preserve">metadata should not be modified</doc>
</member>
<member name="pooled" value="2" c:identifier="GST_META_FLAG_POOLED" glib:nick="pooled">
<doc xml:space="preserve">metadata is managed by a bufferpool</doc>
</member>
<member name="locked" value="4" c:identifier="GST_META_FLAG_LOCKED" glib:nick="locked">
<doc xml:space="preserve">metadata should not be removed</doc>
</member>
<member name="last" value="65536" c:identifier="GST_META_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">additional flags can be added starting from this flag.</doc>
</member>
</bitfield>
<callback name="MetaFreeFunction" c:type="GstMetaFreeFunction">
<doc xml:space="preserve">Function called when @meta is freed in @buffer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="meta" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="GstMeta*"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
<record name="MetaInfo" c:type="GstMetaInfo">
<doc xml:space="preserve">The #GstMetaInfo provides information about a specific metadata
structure.</doc>
<field name="api" writable="1">
<doc xml:space="preserve">tag identifying the metadata structure and api</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="type" writable="1">
<doc xml:space="preserve">type identifying the implementor of the api</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">size of the metadata</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="init_func" writable="1">
<doc xml:space="preserve">function for initializing the metadata</doc>
<type name="MetaInitFunction" c:type="GstMetaInitFunction"/>
</field>
<field name="free_func" writable="1">
<doc xml:space="preserve">function for freeing the metadata</doc>
<type name="MetaFreeFunction" c:type="GstMetaFreeFunction"/>
</field>
<field name="transform_func" writable="1">
<doc xml:space="preserve">function for transforming the metadata</doc>
<type name="MetaTransformFunction" c:type="GstMetaTransformFunction"/>
</field>
</record>
<callback name="MetaInitFunction" c:type="GstMetaInitFunction">
<doc xml:space="preserve">Function called when @meta is initialized in @buffer.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="meta" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="GstMeta*"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">parameters passed to the init function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
<record name="MetaTransformCopy" c:type="GstMetaTransformCopy">
<doc xml:space="preserve">Extra data passed to a "gst-copy" transform #GstMetaTransformFunction.</doc>
<field name="region" writable="1">
<doc xml:space="preserve">%TRUE if only region is copied</doc>
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="offset" writable="1">
<doc xml:space="preserve">the offset to copy, 0 if @region is %FALSE, otherwise &gt; 0</doc>
<type name="gsize" c:type="gsize"/>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">the size to copy, -1 or the buffer size when @region is %FALSE</doc>
<type name="gsize" c:type="gsize"/>
</field>
</record>
<callback name="MetaTransformFunction" c:type="GstMetaTransformFunction">
<doc xml:space="preserve">Function called for each @meta in @buffer as a result of performing a
transformation on @transbuf. Additional @type specific transform data
is passed to the function as @data.
Implementations should check the @type of the transform and parse
additional type specific fields in @data that should be used to update
the metadata on @transbuf.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the transform could be performed</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="transbuf" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="meta" transfer-ownership="none">
<doc xml:space="preserve">a #GstMeta</doc>
<type name="Meta" c:type="GstMeta*"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the transform type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">transform specific data.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="MiniObject" c:type="GstMiniObject">
<doc xml:space="preserve">#GstMiniObject is a simple structure that can be used to implement refcounted
types.
Subclasses will include #GstMiniObject as the first member in their structure
and then call gst_mini_object_init() to initialize the #GstMiniObject fields.
gst_mini_object_ref() and gst_mini_object_unref() increment and decrement the
refcount respectively. When the refcount of a mini-object reaches 0, the
dispose function is called first and when this returns %TRUE, the free
function of the miniobject is called.
A copy can be made with gst_mini_object_copy().
gst_mini_object_is_writable() will return %TRUE when the refcount of the
object is exactly 1 and there is no parent or a single parent exists and is
writable itself, meaning the current caller has the only reference to the
object. gst_mini_object_make_writable() will return a writable version of
the object, which might be a new copy when the refcount was not 1.
Opaque data can be associated with a #GstMiniObject with
gst_mini_object_set_qdata() and gst_mini_object_get_qdata(). The data is
meant to be specific to the particular object and is not automatically copied
with gst_mini_object_copy() or similar methods.
A weak reference can be added and remove with gst_mini_object_weak_ref()
and gst_mini_object_weak_unref() respectively.</doc>
<field name="type" writable="1">
<doc xml:space="preserve">the GType of the object</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="refcount" writable="1">
<doc xml:space="preserve">atomic refcount</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="lockstate" writable="1">
<doc xml:space="preserve">atomic state of the locks</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="flags" writable="1">
<doc xml:space="preserve">extra flags.</doc>
<type name="guint" c:type="guint"/>
</field>
<field name="copy" introspectable="0" writable="1">
<doc xml:space="preserve">a copy function</doc>
<type name="MiniObjectCopyFunction" c:type="GstMiniObjectCopyFunction"/>
</field>
<field name="dispose" writable="1">
<doc xml:space="preserve">a dispose function</doc>
<type name="MiniObjectDisposeFunction" c:type="GstMiniObjectDisposeFunction"/>
</field>
<field name="free" writable="1">
<doc xml:space="preserve">the free function</doc>
<type name="MiniObjectFreeFunction" c:type="GstMiniObjectFreeFunction"/>
</field>
<field name="priv_uint" readable="0" private="1">
<type name="guint" c:type="guint"/>
</field>
<field name="priv_pointer" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<method name="add_parent" c:identifier="gst_mini_object_add_parent" version="1.16">
<doc xml:space="preserve">This adds @parent as a parent for @object. Having one ore more parents affects the
writability of @object: if a @parent is not writable, @object is also not
writable, regardless of its refcount. @object is only writable if all
the parents are writable and its own refcount is exactly 1.
Note: This function does not take ownership of @parent and also does not
take an additional reference. It is the responsibility of the caller to
remove the parent again at a later time.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">a parent #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_mini_object_copy" introspectable="0">
<doc xml:space="preserve">Creates a copy of the mini-object.
MT safe</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new mini-object if copying is
possible, %NULL otherwise.</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object to copy</doc>
<type name="MiniObject" c:type="const GstMiniObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_qdata" c:identifier="gst_mini_object_get_qdata">
<doc xml:space="preserve">This function gets back user data pointers stored via
gst_mini_object_set_qdata().</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The user data pointer set, or
%NULL</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">The GstMiniObject to get a stored user data pointer from</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="quark" transfer-ownership="none">
<doc xml:space="preserve">A #GQuark, naming the user data pointer</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="init" c:identifier="gst_mini_object_init" introspectable="0">
<doc xml:space="preserve">Initializes a mini-object with the desired type and copy/dispose/free
functions.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="none">
<doc xml:space="preserve">a #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">initial #GstMiniObjectFlags</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the #GType of the mini-object to create</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="copy_func" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the copy function, or %NULL</doc>
<type name="MiniObjectCopyFunction" c:type="GstMiniObjectCopyFunction"/>
</parameter>
<parameter name="dispose_func" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the dispose function, or %NULL</doc>
<type name="MiniObjectDisposeFunction" c:type="GstMiniObjectDisposeFunction"/>
</parameter>
<parameter name="free_func" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the free function or %NULL</doc>
<type name="MiniObjectFreeFunction" c:type="GstMiniObjectFreeFunction"/>
</parameter>
</parameters>
</method>
<method name="is_writable" c:identifier="gst_mini_object_is_writable">
<doc xml:space="preserve">If @mini_object has the LOCKABLE flag set, check if the current EXCLUSIVE
lock on @object is the only one, this means that changes to the object will
not be visible to any other object.
If the LOCKABLE flag is not set, check if the refcount of @mini_object is
exactly 1, meaning that no other reference exists to the object and that the
object is therefore writable.
Modification of a mini-object should only be done after verifying that it
is writable.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the object is writable.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object to check</doc>
<type name="MiniObject" c:type="const GstMiniObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="lock" c:identifier="gst_mini_object_lock">
<doc xml:space="preserve">Lock the mini-object with the specified access mode in @flags.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @object could be locked.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object to lock</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstLockFlags</doc>
<type name="LockFlags" c:type="GstLockFlags"/>
</parameter>
</parameters>
</method>
<method name="make_writable" c:identifier="gst_mini_object_make_writable" introspectable="0">
<doc xml:space="preserve">Checks if a mini-object is writable. If not, a writable copy is made and
returned. This gives away the reference to the original mini object,
and returns a reference to the new object.
MT safe</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a mini-object (possibly the same pointer) that
is writable.</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="full">
<doc xml:space="preserve">the mini-object to make writable</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_mini_object_ref" introspectable="0">
<doc xml:space="preserve">Increase the reference count of the mini-object.
Note that the refcount affects the writability
of @mini-object, see gst_mini_object_is_writable(). It is
important to note that keeping additional references to
GstMiniObject instances can potentially increase the number
of memcpy operations in a pipeline, especially if the miniobject
is a #GstBuffer.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the mini-object.</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_parent" c:identifier="gst_mini_object_remove_parent" version="1.16">
<doc xml:space="preserve">This removes @parent as a parent for @object. See
gst_mini_object_add_parent().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">a parent #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</method>
<method name="set_qdata" c:identifier="gst_mini_object_set_qdata">
<doc xml:space="preserve">This sets an opaque, named pointer on a miniobject.
The name is specified through a #GQuark (retrieved e.g. via
g_quark_from_static_string()), and the pointer
can be gotten back from the @object with gst_mini_object_get_qdata()
until the @object is disposed.
Setting a previously set user data pointer, overrides (frees)
the old pointer set, using %NULL as pointer essentially
removes the data stored.
@destroy may be specified which is called with @data as argument
when the @object is disposed, or the data is being overwritten by
a call to gst_mini_object_set_qdata() with the same @quark.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="quark" transfer-ownership="none">
<doc xml:space="preserve">A #GQuark, naming the user data pointer</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">An opaque user data pointer</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="destroy" transfer-ownership="none" scope="async">
<doc xml:space="preserve">Function to invoke with @data as argument, when @data
needs to be freed</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="steal_qdata" c:identifier="gst_mini_object_steal_qdata">
<doc xml:space="preserve">This function gets back user data pointers stored via gst_mini_object_set_qdata()
and removes the data from @object without invoking its `destroy()` function (if
any was set).</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The user data pointer set, or
%NULL</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">The GstMiniObject to get a stored user data pointer from</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="quark" transfer-ownership="none">
<doc xml:space="preserve">A #GQuark, naming the user data pointer</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="unlock" c:identifier="gst_mini_object_unlock">
<doc xml:space="preserve">Unlock the mini-object with the specified access mode in @flags.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object to unlock</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstLockFlags</doc>
<type name="LockFlags" c:type="GstLockFlags"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_mini_object_unref" introspectable="0">
<doc xml:space="preserve">Decreases the reference count of the mini-object, possibly freeing
the mini-object.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="mini_object" transfer-ownership="none">
<doc xml:space="preserve">the mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="weak_ref" c:identifier="gst_mini_object_weak_ref" introspectable="0">
<doc xml:space="preserve">Adds a weak reference callback to a mini object. Weak references are
used for notification when a mini object is finalized. They are called
"weak references" because they allow you to safely hold a pointer
to the mini object without calling gst_mini_object_ref()
(gst_mini_object_ref() adds a strong reference, that is, forces the object
to stay alive).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">#GstMiniObject to reference weakly</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="notify" transfer-ownership="none" closure="1">
<doc xml:space="preserve">callback to invoke before the mini object is freed</doc>
<type name="MiniObjectNotify" c:type="GstMiniObjectNotify"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">extra data to pass to notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="weak_unref" c:identifier="gst_mini_object_weak_unref" introspectable="0">
<doc xml:space="preserve">Removes a weak reference callback from a mini object.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">#GstMiniObject to remove a weak reference from</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</instance-parameter>
<parameter name="notify" transfer-ownership="none" closure="1">
<doc xml:space="preserve">callback to search for</doc>
<type name="MiniObjectNotify" c:type="GstMiniObjectNotify"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">data to search for</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<function name="replace" c:identifier="gst_mini_object_replace">
<doc xml:space="preserve">Atomically modifies a pointer to point to a new mini-object.
The reference count of @olddata is decreased and the reference count of
@newdata is increased.
Either @newdata and the value pointed to by @olddata may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newdata was different from @olddata</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to a
mini-object to be replaced</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
<parameter name="newdata" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to new mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</function>
<function name="steal" c:identifier="gst_mini_object_steal" introspectable="0">
<doc xml:space="preserve">Replace the current #GstMiniObject pointer to by @olddata with %NULL and
return the old value.</doc>
<return-value nullable="1">
<doc xml:space="preserve">the #GstMiniObject at @oldata</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a mini-object to
be stolen</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
</parameters>
</function>
<function name="take" c:identifier="gst_mini_object_take">
<doc xml:space="preserve">Modifies a pointer to point to a new mini-object. The modification
is done atomically. This version is similar to gst_mini_object_replace()
except that it does not increase the refcount of @newdata and thus
takes ownership of @newdata.
Either @newdata and the value pointed to by @olddata may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newdata was different from @olddata</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a mini-object to
be replaced</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
<parameter name="newdata" transfer-ownership="none">
<doc xml:space="preserve">pointer to new mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</function>
</record>
<callback name="MiniObjectCopyFunction" c:type="GstMiniObjectCopyFunction" introspectable="0">
<doc xml:space="preserve">Function prototype for methods to create copies of instances.</doc>
<return-value>
<doc xml:space="preserve">reference to cloned instance.</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<parameter name="obj" transfer-ownership="none">
<doc xml:space="preserve">MiniObject to copy</doc>
<type name="MiniObject" c:type="const GstMiniObject*"/>
</parameter>
</parameters>
</callback>
<callback name="MiniObjectDisposeFunction" c:type="GstMiniObjectDisposeFunction">
<doc xml:space="preserve">Function prototype for when a miniobject has lost its last refcount.
Implementation of the mini object are allowed to revive the
passed object by doing a gst_mini_object_ref(). If the object is not
revived after the dispose function, the function should return %TRUE
and the memory associated with the object is freed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the object should be cleaned up.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="obj" transfer-ownership="none">
<doc xml:space="preserve">MiniObject to dispose</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</callback>
<bitfield name="MiniObjectFlags" glib:type-name="GstMiniObjectFlags" glib:get-type="gst_mini_object_flags_get_type" c:type="GstMiniObjectFlags">
<doc xml:space="preserve">Flags for the mini object</doc>
<member name="lockable" value="1" c:identifier="GST_MINI_OBJECT_FLAG_LOCKABLE" glib:nick="lockable">
<doc xml:space="preserve">the object can be locked and unlocked with
gst_mini_object_lock() and gst_mini_object_unlock().</doc>
</member>
<member name="lock_readonly" value="2" c:identifier="GST_MINI_OBJECT_FLAG_LOCK_READONLY" glib:nick="lock-readonly">
<doc xml:space="preserve">the object is permanently locked in
READONLY mode. Only read locks can be performed on the object.</doc>
</member>
<member name="may_be_leaked" value="4" c:identifier="GST_MINI_OBJECT_FLAG_MAY_BE_LEAKED" glib:nick="may-be-leaked">
<doc xml:space="preserve">the object is expected to stay alive
even after gst_deinit() has been called and so should be ignored by leak
detection tools. (Since: 1.10)</doc>
</member>
<member name="last" value="16" c:identifier="GST_MINI_OBJECT_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">first flag that can be used by subclasses.</doc>
</member>
</bitfield>
<callback name="MiniObjectFreeFunction" c:type="GstMiniObjectFreeFunction">
<doc xml:space="preserve">Virtual function prototype for methods to free resources used by
mini-objects.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="obj" transfer-ownership="none">
<doc xml:space="preserve">MiniObject to free</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</callback>
<callback name="MiniObjectNotify" c:type="GstMiniObjectNotify">
<doc xml:space="preserve">A #GstMiniObjectNotify function can be added to a mini object as a
callback that gets triggered when gst_mini_object_unref() drops the
last ref and @obj is about to be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="0">
<doc xml:space="preserve">data that was provided when the notify was added</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="obj" transfer-ownership="none">
<doc xml:space="preserve">the mini object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</callback>
<constant name="NSECOND" value="1" c:type="GST_NSECOND">
<doc xml:space="preserve">Constant that defines one GStreamer nanosecond</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</constant>
<function-macro name="OBJECT" c:identifier="GST_OBJECT" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_CAST" c:identifier="GST_OBJECT_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_CLASS" c:identifier="GST_OBJECT_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_CLASS_CAST" c:identifier="GST_OBJECT_CLASS_CAST" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_FLAGS" c:identifier="GST_OBJECT_FLAGS" introspectable="0">
<doc xml:space="preserve">This macro returns the entire set of flags for the object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_FLAG_IS_SET" c:identifier="GST_OBJECT_FLAG_IS_SET" introspectable="0">
<doc xml:space="preserve">This macro checks to see if the given flag is set.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to check for</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_FLAG_SET" c:identifier="GST_OBJECT_FLAG_SET" introspectable="0">
<doc xml:space="preserve">This macro sets the given bits.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to set</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_FLAG_UNSET" c:identifier="GST_OBJECT_FLAG_UNSET" introspectable="0">
<doc xml:space="preserve">This macro unsets the given bits.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
<parameter name="flag">
<doc xml:space="preserve">Flag to set</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_GET_CLASS" c:identifier="GST_OBJECT_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_GET_LOCK" c:identifier="GST_OBJECT_GET_LOCK" introspectable="0">
<doc xml:space="preserve">Acquire a reference to the mutex of this object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_LOCK" c:identifier="GST_OBJECT_LOCK" introspectable="0">
<doc xml:space="preserve">This macro will obtain a lock on the object, making serialization possible.
It blocks until the lock can be obtained.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject to lock</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_NAME" c:identifier="GST_OBJECT_NAME" introspectable="0">
<doc xml:space="preserve">Get the name of this object. This is not thread-safe by default
(i.e. you will have to make sure the object lock is taken yourself).
If in doubt use gst_object_get_name() instead.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_PARENT" c:identifier="GST_OBJECT_PARENT" introspectable="0">
<doc xml:space="preserve">Get the parent of this object. This is not thread-safe by default
(i.e. you will have to make sure the object lock is taken yourself).
If in doubt use gst_object_get_parent() instead.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_REFCOUNT" c:identifier="GST_OBJECT_REFCOUNT" introspectable="0">
<doc xml:space="preserve">Get access to the reference count field of the object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_REFCOUNT_VALUE" c:identifier="GST_OBJECT_REFCOUNT_VALUE" introspectable="0">
<doc xml:space="preserve">Get the reference count value of the object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_TRYLOCK" c:identifier="GST_OBJECT_TRYLOCK" introspectable="0">
<doc xml:space="preserve">This macro will try to obtain a lock on the object, but will return with
%FALSE if it can't get it immediately.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="OBJECT_UNLOCK" c:identifier="GST_OBJECT_UNLOCK" introspectable="0">
<doc xml:space="preserve">This macro releases a lock on the object.</doc>
<parameters>
<parameter name="obj">
<doc xml:space="preserve">a #GstObject to unlock.</doc>
</parameter>
</parameters>
</function-macro>
<class name="Object" c:symbol-prefix="object" c:type="GstObject" parent="GObject.InitiallyUnowned" abstract="1" glib:type-name="GstObject" glib:get-type="gst_object_get_type" glib:type-struct="ObjectClass">
<doc xml:space="preserve">#GstObject provides a root for the object hierarchy tree filed in by the
GStreamer library. It is currently a thin wrapper on top of
#GInitiallyUnowned. It is an abstract class that is not very usable on its own.
#GstObject gives us basic refcounting, parenting functionality and locking.
Most of the functions are just extended for special GStreamer needs and can be
found under the same name in the base class of #GstObject which is #GObject
(e.g. g_object_ref() becomes gst_object_ref()).
Since #GstObject derives from #GInitiallyUnowned, it also inherits the
floating reference. Be aware that functions such as gst_bin_add() and
gst_element_add_pad() take ownership of the floating reference.
In contrast to #GObject instances, #GstObject adds a name property. The functions
gst_object_set_name() and gst_object_get_name() are used to set/get the name
of the object.
## controlled properties
Controlled properties offers a lightweight way to adjust gobject properties
over stream-time. It works by using time-stamped value pairs that are queued
for element-properties. At run-time the elements continuously pull value
changes for the current stream-time.
What needs to be changed in a #GstElement?
Very little - it is just two steps to make a plugin controllable!
* mark gobject-properties paramspecs that make sense to be controlled,
by GST_PARAM_CONTROLLABLE.
* when processing data (get, chain, loop function) at the beginning call
gst_object_sync_values(element,timestamp).
This will make the controller update all GObject properties that are
under its control with the current values based on the timestamp.
What needs to be done in applications? Again it's not a lot to change.
* create a #GstControlSource.
csource = gst_interpolation_control_source_new ();
g_object_set (csource, "mode", GST_INTERPOLATION_MODE_LINEAR, NULL);
* Attach the #GstControlSource on the controller to a property.
gst_object_add_control_binding (object, gst_direct_control_binding_new (object, "prop1", csource));
* Set the control values
gst_timed_value_control_source_set ((GstTimedValueControlSource *)csource,0 * GST_SECOND, value1);
gst_timed_value_control_source_set ((GstTimedValueControlSource *)csource,1 * GST_SECOND, value2);
* start your pipeline</doc>
<function name="check_uniqueness" c:identifier="gst_object_check_uniqueness">
<doc xml:space="preserve">Checks to see if there is any object named @name in @list. This function
does not do any locking of any kind. You might want to protect the
provided list with the lock of the owner of the list. This function
will lock each #GstObject in the list to compare the name, so be
careful when passing a list with a locked object.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if a #GstObject named @name does not appear in @list,
%FALSE if it does.
MT safe. Grabs and releases the LOCK of each object in the list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a list of #GstObject to
check through</doc>
<type name="GLib.List" c:type="GList*">
<type name="Object"/>
</type>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name to search for</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="default_deep_notify" c:identifier="gst_object_default_deep_notify">
<doc xml:space="preserve">A default deep_notify signal callback for an object. The user data
should contain a pointer to an array of strings that should be excluded
from the notify. The default handler will print the new value of the property
using g_print.
MT safe. This function grabs and releases @object's LOCK for getting its
path string.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the #GObject that signalled the notify.</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="orig" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject that initiated the notify.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="pspec" transfer-ownership="none">
<doc xml:space="preserve">a #GParamSpec of the property.</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
<parameter name="excluded_props" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">
a set of user-specified properties to exclude or %NULL to show
all changes.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</parameter>
</parameters>
</function>
<function name="ref_sink" c:identifier="gst_object_ref_sink" introspectable="0">
<doc xml:space="preserve">Increase the reference count of @object, and possibly remove the floating
reference, if @object has a floating reference.
In other words, if the object is floating, then this call "assumes ownership"
of the floating reference, converting it to a normal reference by clearing
the floating flag while leaving the reference count unchanged. If the object
is not floating, then this call adds a new normal reference increasing the
reference count by one.
For more background on "floating references" please see the #GObject
documentation.</doc>
<return-value transfer-ownership="none" nullable="1">
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstObject to sink</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</function>
<function name="replace" c:identifier="gst_object_replace">
<doc xml:space="preserve">Atomically modifies a pointer to point to a new object.
The reference count of @oldobj is decreased and the reference count of
@newobj is increased.
Either @newobj and the value pointed to by @oldobj may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newobj was different from @oldobj</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="oldobj" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a place of
a #GstObject to replace</doc>
<type name="Object" c:type="GstObject**"/>
</parameter>
<parameter name="newobj" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a new #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</function>
<virtual-method name="deep_notify">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="orig" transfer-ownership="none">
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="pspec" transfer-ownership="none">
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
</parameters>
</virtual-method>
<method name="add_control_binding" c:identifier="gst_object_add_control_binding">
<doc xml:space="preserve">Attach the #GstControlBinding to the object. If there already was a
#GstControlBinding for this property it will be replaced.
The object's reference count will be incremented, and any floating
reference will be removed (see gst_object_ref_sink())</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if the given @binding has not been setup for this object or
has been setup for a non suitable property, %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the controller object</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the #GstControlBinding that should be used</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
</parameters>
</method>
<method name="default_error" c:identifier="gst_object_default_error">
<doc xml:space="preserve">A default error function that uses g_printerr() to display the error message
and the optional debug string..
The default handler will simply print the error string using g_print.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="source" transfer-ownership="none">
<doc xml:space="preserve">the #GstObject that initiated the error.</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="error" transfer-ownership="none">
<doc xml:space="preserve">the GError.</doc>
<type name="GLib.Error" c:type="const GError*"/>
</parameter>
<parameter name="debug" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">an additional debug information string, or %NULL</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_control_binding" c:identifier="gst_object_get_control_binding">
<doc xml:space="preserve">Gets the corresponding #GstControlBinding for the property. This should be
unreferenced again after use.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstControlBinding for
@property_name or %NULL if the property is not controlled.</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">name of the property</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_control_rate" c:identifier="gst_object_get_control_rate">
<doc xml:space="preserve">Obtain the control-rate for this @object. Audio processing #GstElement
objects will use this rate to sub-divide their processing loop and call
gst_object_sync_values() in between. The length of the processing segment
should be up to @control-rate nanoseconds.
If the @object is not under property control, this will return
%GST_CLOCK_TIME_NONE. This allows the element to avoid the sub-dividing.
The control-rate is not expected to change if the element is in
%GST_STATE_PAUSED or %GST_STATE_PLAYING.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the control rate in nanoseconds</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_g_value_array" c:identifier="gst_object_get_g_value_array">
<doc xml:space="preserve">Gets a number of #GValues for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
#GValue.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">the name of the property to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none">
<doc xml:space="preserve">array to put control-values in</doc>
<array length="3" zero-terminated="0" c:type="GValue*">
<type name="GObject.Value" c:type="GValue"/>
</array>
</parameter>
</parameters>
</method>
<method name="get_name" c:identifier="gst_object_get_name">
<doc xml:space="preserve">Returns a copy of the name of @object.
Caller should g_free() the return value after usage.
For a nameless object, this returns %NULL, which you can safely g_free()
as well.
Free-function: g_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the name of @object. g_free()
after usage.
MT safe. This function grabs and releases @object's LOCK.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_parent" c:identifier="gst_object_get_parent">
<doc xml:space="preserve">Returns the parent of @object. This function increases the refcount
of the parent object so you should gst_object_unref() it after usage.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">parent of @object, this can be
%NULL if @object has no parent. unref after usage.
MT safe. Grabs and releases @object's LOCK.</doc>
<type name="Object" c:type="GstObject*"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_path_string" c:identifier="gst_object_get_path_string">
<doc xml:space="preserve">Generates a string describing the path of @object in
the object hierarchy. Only useful (or used) for debugging.
Free-function: g_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a string describing the path of @object. You must
g_free() the string after usage.
MT safe. Grabs and releases the #GstObject's LOCK for all objects
in the hierarchy.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_value" c:identifier="gst_object_get_value">
<doc xml:space="preserve">Gets the value for the given controlled property at the requested time.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the GValue of the property at the given time,
or %NULL if the property isn't controlled.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">the name of the property to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time the control-change should be read from</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="get_value_array" c:identifier="gst_object_get_value_array" introspectable="0">
<doc xml:space="preserve">Gets a number of values for the given controlled property starting at the
requested time. The array @values need to hold enough space for @n_values of
the same type as the objects property's type.
This function is useful if one wants to e.g. draw a graph of the control
curve or apply a control curve sample by sample.
The values are unboxed and ready to be used. The similar function
gst_object_get_g_value_array() returns the array as #GValues and is
better suites for bindings.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given array could be filled, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">the name of the property to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="interval" transfer-ownership="none">
<doc xml:space="preserve">the time spacing between subsequent values</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="n_values" transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="values" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">array to put control-values in</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="has_active_control_bindings" c:identifier="gst_object_has_active_control_bindings">
<doc xml:space="preserve">Check if the @object has active controlled properties.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the object has active controlled properties</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_ancestor" c:identifier="gst_object_has_ancestor" deprecated="1">
<doc xml:space="preserve">Check if @object has an ancestor @ancestor somewhere up in
the hierarchy. One can e.g. check if a #GstElement is inside a #GstPipeline.</doc>
<doc-deprecated xml:space="preserve">Use gst_object_has_as_ancestor() instead.
MT safe. Grabs and releases @object's locks.</doc-deprecated>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @ancestor is an ancestor of @object.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="ancestor" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check as ancestor</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</method>
<method name="has_as_ancestor" c:identifier="gst_object_has_as_ancestor">
<doc xml:space="preserve">Check if @object has an ancestor @ancestor somewhere up in
the hierarchy. One can e.g. check if a #GstElement is inside a #GstPipeline.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @ancestor is an ancestor of @object.
MT safe. Grabs and releases @object's locks.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="ancestor" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check as ancestor</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</method>
<method name="has_as_parent" c:identifier="gst_object_has_as_parent" version="1.6">
<doc xml:space="preserve">Check if @parent is the parent of @object.
E.g. a #GstElement can check if it owns a given #GstPad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if either @object or @parent is %NULL. %TRUE if @parent is
the parent of @object. Otherwise %FALSE.
MT safe. Grabs and releases @object's locks.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to check as parent</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_object_ref">
<doc xml:space="preserve">Increments the reference count on @object. This function
does not take the lock on @object because it relies on
atomic refcounting.
This object returns the input parameter to ease writing
constructs like :
result = gst_object_ref (object-&gt;parent);</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A pointer to @object</doc>
<type name="Object" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to reference</doc>
<type name="Object" c:type="gpointer"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_control_binding" c:identifier="gst_object_remove_control_binding">
<doc xml:space="preserve">Removes the corresponding #GstControlBinding. If it was the
last ref of the binding, it will be disposed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the binding could be removed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="binding" transfer-ownership="none">
<doc xml:space="preserve">the binding</doc>
<type name="ControlBinding" c:type="GstControlBinding*"/>
</parameter>
</parameters>
</method>
<method name="set_control_binding_disabled" c:identifier="gst_object_set_control_binding_disabled">
<doc xml:space="preserve">This function is used to disable the control bindings on a property for
some time, i.e. gst_object_sync_values() will do nothing for the
property.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="property_name" transfer-ownership="none">
<doc xml:space="preserve">property to disable</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="disabled" transfer-ownership="none">
<doc xml:space="preserve">boolean that specifies whether to disable the controller
or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_control_bindings_disabled" c:identifier="gst_object_set_control_bindings_disabled">
<doc xml:space="preserve">This function is used to disable all controlled properties of the @object for
some time, i.e. gst_object_sync_values() will do nothing.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="disabled" transfer-ownership="none">
<doc xml:space="preserve">boolean that specifies whether to disable the controller
or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_control_rate" c:identifier="gst_object_set_control_rate">
<doc xml:space="preserve">Change the control-rate for this @object. Audio processing #GstElement
objects will use this rate to sub-divide their processing loop and call
gst_object_sync_values() in between. The length of the processing segment
should be up to @control-rate nanoseconds.
The control-rate should not change if the element is in %GST_STATE_PAUSED or
%GST_STATE_PLAYING.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="control_rate" transfer-ownership="none">
<doc xml:space="preserve">the new control-rate in nanoseconds.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_name" c:identifier="gst_object_set_name">
<doc xml:space="preserve">Sets the name of @object, or gives @object a guaranteed unique
name (if @name is %NULL).
This function makes a copy of the provided name, so the caller
retains ownership of the name it sent.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the name could be set. Since Objects that have
a parent cannot be renamed, this function returns %FALSE in those
cases.
MT safe. This function grabs and releases @object's LOCK.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">new name of object</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_parent" c:identifier="gst_object_set_parent">
<doc xml:space="preserve">Sets the parent of @object to @parent. The object's reference count will
be incremented, and any floating reference will be removed (see gst_object_ref_sink()).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @parent could be set or %FALSE when @object
already had a parent or @object and @parent are the same.
MT safe. Grabs and releases @object's LOCK.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">new parent of object</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</method>
<method name="suggest_next_sync" c:identifier="gst_object_suggest_next_sync">
<doc xml:space="preserve">Returns a suggestion for timestamps where buffers should be split
to get best controller results.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Returns the suggested timestamp or %GST_CLOCK_TIME_NONE
if no control-rate was set.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="sync_values" c:identifier="gst_object_sync_values">
<doc xml:space="preserve">Sets the properties of the object, according to the #GstControlSources that
(maybe) handle them and for the given timestamp.
If this function fails, it is most likely the application developers fault.
Most probably the control sources are not setup correctly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the controller values could be applied to the object
properties, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object that has controlled properties</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
<parameter name="timestamp" transfer-ownership="none">
<doc xml:space="preserve">the time that should be processed</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="unparent" c:identifier="gst_object_unparent">
<doc xml:space="preserve">Clear the parent of @object, removing the associated reference.
This function decreases the refcount of @object.
MT safe. Grabs and releases @object's lock.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to unparent</doc>
<type name="Object" c:type="GstObject*"/>
</instance-parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_object_unref">
<doc xml:space="preserve">Decrements the reference count on @object. If reference count hits
zero, destroy @object. This function does not take the lock
on @object as it relies on atomic refcounting.
The unref method should never be called with the LOCK held since
this might deadlock the dispose function.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">a #GstObject to unreference</doc>
<type name="Object" c:type="gpointer"/>
</instance-parameter>
</parameters>
</method>
<property name="name" writable="1" construct="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<property name="parent" writable="1" transfer-ownership="none">
<doc xml:space="preserve">The parent of the object. Please note, that when changing the 'parent'
property, we don't emit #GObject::notify and #GstObject::deep-notify
signals due to locking issues. In some cases one can use
#GstBin::element-added or #GstBin::element-removed signals on the parent to
achieve a similar effect.</doc>
<type name="Object"/>
</property>
<field name="object">
<type name="GObject.InitiallyUnowned" c:type="GInitiallyUnowned"/>
</field>
<field name="lock">
<doc xml:space="preserve">object LOCK</doc>
<type name="GLib.Mutex" c:type="GMutex"/>
</field>
<field name="name">
<doc xml:space="preserve">The name of the object</doc>
<type name="utf8" c:type="gchar*"/>
</field>
<field name="parent">
<doc xml:space="preserve">this object's parent, weak ref</doc>
<type name="Object" c:type="GstObject*"/>
</field>
<field name="flags">
<doc xml:space="preserve">flags for this object</doc>
<type name="guint32" c:type="guint32"/>
</field>
<field name="control_bindings" readable="0" private="1">
<type name="GLib.List" c:type="GList*">
<type name="gpointer" c:type="gpointer"/>
</type>
</field>
<field name="control_rate" readable="0" private="1">
<type name="guint64" c:type="guint64"/>
</field>
<field name="last_sync" readable="0" private="1">
<type name="guint64" c:type="guint64"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<glib:signal name="deep-notify" when="first" no-recurse="1" detailed="1" no-hooks="1">
<doc xml:space="preserve">The deep notify signal is used to be notified of property changes. It is
typically attached to the toplevel bin to receive notifications from all
the elements contained in that bin.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="prop_object" transfer-ownership="none">
<doc xml:space="preserve">the object that originated the signal</doc>
<type name="Object"/>
</parameter>
<parameter name="prop" transfer-ownership="none">
<doc xml:space="preserve">the property that changed</doc>
<type name="GObject.ParamSpec"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="ObjectClass" c:type="GstObjectClass" glib:is-gtype-struct-for="Object">
<doc xml:space="preserve">GStreamer base object class.</doc>
<field name="parent_class">
<doc xml:space="preserve">parent</doc>
<type name="GObject.InitiallyUnownedClass" c:type="GInitiallyUnownedClass"/>
</field>
<field name="path_string_separator">
<doc xml:space="preserve">separator used by gst_object_get_path_string()</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="deep_notify">
<callback name="deep_notify">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="orig" transfer-ownership="none">
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="pspec" transfer-ownership="none">
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="ObjectFlags" glib:type-name="GstObjectFlags" glib:get-type="gst_object_flags_get_type" c:type="GstObjectFlags">
<doc xml:space="preserve">The standard flags that an gstobject may have.</doc>
<member name="may_be_leaked" value="1" c:identifier="GST_OBJECT_FLAG_MAY_BE_LEAKED" glib:nick="may-be-leaked">
<doc xml:space="preserve">the object is expected to stay alive even
after gst_deinit() has been called and so should be ignored by leak
detection tools. (Since: 1.10)</doc>
</member>
<member name="last" value="16" c:identifier="GST_OBJECT_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">subclasses can add additional flags starting from this flag</doc>
</member>
</bitfield>
<function-macro name="PAD" c:identifier="GST_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_ACTIVATEFUNC" c:identifier="GST_PAD_ACTIVATEFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadActivateFunction from @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_ACTIVATEMODEFUNC" c:identifier="GST_PAD_ACTIVATEMODEFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadActivateModeFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_BLOCK_BROADCAST" c:identifier="GST_PAD_BLOCK_BROADCAST" introspectable="0">
<parameters>
<parameter name="pad">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_BLOCK_GET_COND" c:identifier="GST_PAD_BLOCK_GET_COND" introspectable="0">
<parameters>
<parameter name="pad">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_BLOCK_SIGNAL" c:identifier="GST_PAD_BLOCK_SIGNAL" introspectable="0">
<parameters>
<parameter name="pad">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_BLOCK_WAIT" c:identifier="GST_PAD_BLOCK_WAIT" introspectable="0">
<parameters>
<parameter name="pad">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_CAST" c:identifier="GST_PAD_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_CHAINFUNC" c:identifier="GST_PAD_CHAINFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadChainFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_CHAINLISTFUNC" c:identifier="GST_PAD_CHAINLISTFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadChainListFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_CLASS" c:identifier="GST_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_DIRECTION" c:identifier="GST_PAD_DIRECTION" introspectable="0">
<doc xml:space="preserve">Get the #GstPadDirection of the given @pad. Accessor macro, use
gst_pad_get_direction() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_ELEMENT_PRIVATE" c:identifier="GST_PAD_ELEMENT_PRIVATE" introspectable="0">
<doc xml:space="preserve">Get the private data of @pad, which is usually some pad- or stream-specific
structure created by the element and set on the pad when creating it.
No locking is performed in this function.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_EVENTFULLFUNC" c:identifier="GST_PAD_EVENTFULLFUNC" version="1.8" introspectable="0">
<doc xml:space="preserve">Get the #GstPadEventFullFunction from the given @pad, which
is the function that handles events on the pad. You can
use this to set your own event handling function on a pad
after you create it. If your element derives from a base
class, use the base class's virtual functions instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_EVENTFUNC" c:identifier="GST_PAD_EVENTFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadEventFunction from the given @pad, which
is the function that handles events on the pad. You can
use this to set your own event handling function on a pad
after you create it. If your element derives from a base
class, use the base class's virtual functions instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_GETRANGEFUNC" c:identifier="GST_PAD_GETRANGEFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadGetRangeFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_GET_STREAM_LOCK" c:identifier="GST_PAD_GET_STREAM_LOCK" introspectable="0">
<doc xml:space="preserve">Get the stream lock of @pad. The stream lock is protecting the
resources used in the data processing functions of @pad. Accessor
macro, use GST_PAD_STREAM_LOCK() and GST_PAD_STREAM_UNLOCK() instead
to take/release the pad's stream lock.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_HAS_PENDING_EVENTS" c:identifier="GST_PAD_HAS_PENDING_EVENTS" introspectable="0">
<doc xml:space="preserve">Check if the given @pad has pending events. This is used internally by
GStreamer.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_ACCEPT_INTERSECT" c:identifier="GST_PAD_IS_ACCEPT_INTERSECT" introspectable="0">
<doc xml:space="preserve">Check if the pad's accept intersect flag is set. The default accept-caps
handler will check if the caps intersect the query-caps result instead of
checking for a subset. This is interesting for parser elements that can
accept incompletely specified caps.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_ACCEPT_TEMPLATE" c:identifier="GST_PAD_IS_ACCEPT_TEMPLATE" version="1.6" introspectable="0">
<doc xml:space="preserve">Check if the pad's accept caps operation will use the pad template caps.
The default accept-caps will do a query caps to get the caps, which might
be querying downstream causing unnecessary overhead. It is recommended to
implement a proper accept-caps query handler or to use this flag to prevent
recursive accept-caps handling.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_ACTIVE" c:identifier="GST_PAD_IS_ACTIVE" introspectable="0">
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_BLOCKED" c:identifier="GST_PAD_IS_BLOCKED" introspectable="0">
<doc xml:space="preserve">Check if the dataflow on a @pad is blocked. Use gst_pad_is_blocked() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_BLOCKING" c:identifier="GST_PAD_IS_BLOCKING" introspectable="0">
<doc xml:space="preserve">Check if the @pad is currently blocking on a buffer or event. Use
gst_pad_is_blocking() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_EOS" c:identifier="GST_PAD_IS_EOS" introspectable="0">
<doc xml:space="preserve">Check if the @pad is in EOS state.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_FIXED_CAPS" c:identifier="GST_PAD_IS_FIXED_CAPS" introspectable="0">
<doc xml:space="preserve">Check if the given @pad is using fixed caps, which means that
once the caps are set on the @pad, the caps query function will
only return those caps. See gst_pad_use_fixed_caps().</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_FLUSHING" c:identifier="GST_PAD_IS_FLUSHING" introspectable="0">
<doc xml:space="preserve">Check if the given @pad is flushing.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_LINKED" c:identifier="GST_PAD_IS_LINKED" introspectable="0">
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_PROXY_ALLOCATION" c:identifier="GST_PAD_IS_PROXY_ALLOCATION" introspectable="0">
<doc xml:space="preserve">Check if the given @pad is set as proxy allocation which means
that the default query handler will forward allocation queries to the
internally linked @pads instead of discarding them.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_PROXY_CAPS" c:identifier="GST_PAD_IS_PROXY_CAPS" introspectable="0">
<doc xml:space="preserve">Check if the given @pad is set to proxy caps. This means that the default
event and query handler will forward all events and queries to the
internally linked @pads instead of discarding them.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_PROXY_SCHEDULING" c:identifier="GST_PAD_IS_PROXY_SCHEDULING" introspectable="0">
<doc xml:space="preserve">Check if the given @pad is set to proxy scheduling queries, which means that
the default query handler will forward scheduling queries to the internally
linked @pads instead of discarding them.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_SINK" c:identifier="GST_PAD_IS_SINK" introspectable="0">
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_IS_SRC" c:identifier="GST_PAD_IS_SRC" introspectable="0">
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_ITERINTLINKFUNC" c:identifier="GST_PAD_ITERINTLINKFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadIterIntLinkFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_LAST_FLOW_RETURN" c:identifier="GST_PAD_LAST_FLOW_RETURN" version="1.4" introspectable="0">
<doc xml:space="preserve">Gets the last flow return on this pad</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_LINKFUNC" c:identifier="GST_PAD_LINKFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadLinkFunction for the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_LINK_FAILED" c:identifier="GST_PAD_LINK_FAILED" introspectable="0">
<doc xml:space="preserve">Macro to test if the given #GstPadLinkReturn value indicates a failed
link step.</doc>
<parameters>
<parameter name="ret">
<doc xml:space="preserve">the #GstPadLinkReturn value</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_LINK_SUCCESSFUL" c:identifier="GST_PAD_LINK_SUCCESSFUL" introspectable="0">
<doc xml:space="preserve">Macro to test if the given #GstPadLinkReturn value indicates a successful
link step.</doc>
<parameters>
<parameter name="ret">
<doc xml:space="preserve">the #GstPadLinkReturn value</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_MODE" c:identifier="GST_PAD_MODE" introspectable="0">
<doc xml:space="preserve">Get the #GstPadMode of pad, which will be GST_PAD_MODE_NONE if the pad
has not been activated yet, and otherwise either GST_PAD_MODE_PUSH or
GST_PAD_MODE_PULL depending on which mode the pad was activated in.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_NAME" c:identifier="GST_PAD_NAME" introspectable="0">
<doc xml:space="preserve">Get name of the given pad.
No locking is performed in this function, use gst_pad_get_name() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_NEEDS_PARENT" c:identifier="GST_PAD_NEEDS_PARENT" introspectable="0">
<doc xml:space="preserve">Check if there is a parent object before calling into the @pad callbacks.
This is used internally by GStreamer.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_NEEDS_RECONFIGURE" c:identifier="GST_PAD_NEEDS_RECONFIGURE" introspectable="0">
<doc xml:space="preserve">Check if the @pad should be reconfigured/renegotiated.
The flag has to be unset manually after reconfiguration happened.
Use gst_pad_needs_reconfigure() or gst_pad_check_reconfigure() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PAD_TEMPLATE" c:identifier="GST_PAD_PAD_TEMPLATE" introspectable="0">
<doc xml:space="preserve">Get the @pad #GstPadTemplate. It describes the possible media types
a @pad or an element factory can handle.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PARENT" c:identifier="GST_PAD_PARENT" introspectable="0">
<doc xml:space="preserve">Get the @pad parent.
No locking is performed in this function, use gst_pad_get_parent() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PEER" c:identifier="GST_PAD_PEER" introspectable="0">
<doc xml:space="preserve">Return the pad's peer member. This member is a pointer to the linked @pad.
No locking is performed in this function, use gst_pad_get_peer() instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_BUFFER" c:identifier="GST_PAD_PROBE_INFO_BUFFER" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_BUFFER_LIST" c:identifier="GST_PAD_PROBE_INFO_BUFFER_LIST" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_DATA" c:identifier="GST_PAD_PROBE_INFO_DATA" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_EVENT" c:identifier="GST_PAD_PROBE_INFO_EVENT" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_FLOW_RETURN" c:identifier="GST_PAD_PROBE_INFO_FLOW_RETURN" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_ID" c:identifier="GST_PAD_PROBE_INFO_ID" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_OFFSET" c:identifier="GST_PAD_PROBE_INFO_OFFSET" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_QUERY" c:identifier="GST_PAD_PROBE_INFO_QUERY" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_SIZE" c:identifier="GST_PAD_PROBE_INFO_SIZE" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_PROBE_INFO_TYPE" c:identifier="GST_PAD_PROBE_INFO_TYPE" introspectable="0">
<parameters>
<parameter name="d">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_QUERYFUNC" c:identifier="GST_PAD_QUERYFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadQueryFunction from @pad, which is the function
that handles queries on the pad. You can use this to set your
own query handling function on a pad after you create it. If your
element derives from a base class, use the base class's virtual
functions instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_ACCEPT_INTERSECT" c:identifier="GST_PAD_SET_ACCEPT_INTERSECT" introspectable="0">
<doc xml:space="preserve">Set @pad to by default accept caps by intersecting the result instead of
checking for a subset. This is interesting for parser elements that can
accept incompletely specified caps.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_ACCEPT_TEMPLATE" c:identifier="GST_PAD_SET_ACCEPT_TEMPLATE" version="1.6" introspectable="0">
<doc xml:space="preserve">Set @pad to by default use the pad template caps to compare with
the accept caps instead of using a caps query result.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_FLUSHING" c:identifier="GST_PAD_SET_FLUSHING" introspectable="0">
<doc xml:space="preserve">Set the given @pad to flushing state, which means it will not accept any
more events, queries or buffers, and return GST_FLOW_FLUSHING if any buffers
are pushed on it. This usually happens when the pad is shut down or when
a flushing seek happens. This is used inside GStreamer when flush start/stop
events pass through pads, or when an element state is changed and pads are
activated or deactivated.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_PROXY_ALLOCATION" c:identifier="GST_PAD_SET_PROXY_ALLOCATION" introspectable="0">
<doc xml:space="preserve">Set @pad to proxy allocation queries, which means that the default query
handler will forward allocation queries to the internally linked @pads
instead of discarding them.
Set this if the element always outputs data in the exact same format as it
receives as input. This is just for convenience to avoid implementing some
standard query handling code in an element.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_PROXY_CAPS" c:identifier="GST_PAD_SET_PROXY_CAPS" introspectable="0">
<doc xml:space="preserve">Set @pad to proxy caps, so that all caps-related events and queries are
proxied down- or upstream to the other side of the element automatically.
Set this if the element always outputs data in the exact same format as it
receives as input. This is just for convenience to avoid implementing some
standard event and query handling code in an element.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_SET_PROXY_SCHEDULING" c:identifier="GST_PAD_SET_PROXY_SCHEDULING" introspectable="0">
<doc xml:space="preserve">Set @pad to proxy scheduling queries, which means that the default query
handler will forward scheduling queries to the internally linked @pads
instead of discarding them. You will usually want to handle scheduling
queries explicitly if your element supports multiple scheduling modes.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_STREAM_LOCK" c:identifier="GST_PAD_STREAM_LOCK" introspectable="0">
<doc xml:space="preserve">Take the pad's stream lock. The stream lock is recursive and will be taken
when buffers or serialized downstream events are pushed on a pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_STREAM_TRYLOCK" c:identifier="GST_PAD_STREAM_TRYLOCK" introspectable="0">
<doc xml:space="preserve">Try to take the pad's stream lock, and return %TRUE if the lock could be
taken, and otherwise %FALSE.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_STREAM_UNLOCK" c:identifier="GST_PAD_STREAM_UNLOCK" introspectable="0">
<doc xml:space="preserve">Release the pad's stream lock.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TASK" c:identifier="GST_PAD_TASK" introspectable="0">
<doc xml:space="preserve">Get the #GstTask of @pad. Accessor macro used by GStreamer. Use the
gst_pad_start_task(), gst_pad_stop_task() and gst_pad_pause_task()
functions instead.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE" c:identifier="GST_PAD_TEMPLATE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_CAPS" c:identifier="GST_PAD_TEMPLATE_CAPS" introspectable="0">
<doc xml:space="preserve">Get a handle to the padtemplate #GstCaps</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_CLASS" c:identifier="GST_PAD_TEMPLATE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_DIRECTION" c:identifier="GST_PAD_TEMPLATE_DIRECTION" introspectable="0">
<doc xml:space="preserve">Get the #GstPadDirection of the padtemplate.</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_GTYPE" c:identifier="GST_PAD_TEMPLATE_GTYPE" version="1.14" introspectable="0">
<doc xml:space="preserve">Get the #GType of the padtemplate</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_IS_FIXED" c:identifier="GST_PAD_TEMPLATE_IS_FIXED" introspectable="0">
<doc xml:space="preserve">Check if the properties of the padtemplate are fixed</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_NAME_TEMPLATE" c:identifier="GST_PAD_TEMPLATE_NAME_TEMPLATE" introspectable="0">
<doc xml:space="preserve">Get the nametemplate of the padtemplate.</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_TEMPLATE_PRESENCE" c:identifier="GST_PAD_TEMPLATE_PRESENCE" introspectable="0">
<doc xml:space="preserve">Get the #GstPadPresence of the padtemplate.</doc>
<parameters>
<parameter name="templ">
<doc xml:space="preserve">the template to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNLINKFUNC" c:identifier="GST_PAD_UNLINKFUNC" introspectable="0">
<doc xml:space="preserve">Get the #GstPadUnlinkFunction from the given @pad.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_ACCEPT_INTERSECT" c:identifier="GST_PAD_UNSET_ACCEPT_INTERSECT" introspectable="0">
<doc xml:space="preserve">Unset accept intersect flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_ACCEPT_TEMPLATE" c:identifier="GST_PAD_UNSET_ACCEPT_TEMPLATE" version="1.6" introspectable="0">
<doc xml:space="preserve">Unset accept template flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_FLUSHING" c:identifier="GST_PAD_UNSET_FLUSHING" introspectable="0">
<doc xml:space="preserve">Unset the flushing flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_PROXY_ALLOCATION" c:identifier="GST_PAD_UNSET_PROXY_ALLOCATION" introspectable="0">
<doc xml:space="preserve">Unset proxy allocation flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_PROXY_CAPS" c:identifier="GST_PAD_UNSET_PROXY_CAPS" introspectable="0">
<doc xml:space="preserve">Unset proxy caps flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PAD_UNSET_PROXY_SCHEDULING" c:identifier="GST_PAD_UNSET_PROXY_SCHEDULING" introspectable="0">
<doc xml:space="preserve">Unset proxy scheduling flag.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">a #GstPad</doc>
</parameter>
</parameters>
</function-macro>
<constant name="PARAM_CONDITIONALLY_AVAILABLE" value="16384" c:type="GST_PARAM_CONDITIONALLY_AVAILABLE" version="1.18">
<doc xml:space="preserve">Use this flag on GObject properties of GstObject to indicate that
they might not be available depending on environment such as OS, device, etc,
so such properties will be installed conditionally only if the GstObject is
able to support it.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="PARAM_CONTROLLABLE" value="512" c:type="GST_PARAM_CONTROLLABLE">
<doc xml:space="preserve">Use this flag on GObject properties to signal they can make sense to be.
controlled over time. This hint is used by the GstController.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="PARAM_DOC_SHOW_DEFAULT" value="8192" c:type="GST_PARAM_DOC_SHOW_DEFAULT" version="1.18">
<doc xml:space="preserve">Use this flag on GObject properties of GstObject to indicate that
during `gst-inspect` and friends, the default value should be used
as default instead of the current value.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="PARAM_MUTABLE_PAUSED" value="2048" c:type="GST_PARAM_MUTABLE_PAUSED">
<doc xml:space="preserve">Use this flag on GObject properties of GstElements to indicate that
they can be changed when the element is in the PAUSED or lower state.
This flag implies GST_PARAM_MUTABLE_READY.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="PARAM_MUTABLE_PLAYING" value="4096" c:type="GST_PARAM_MUTABLE_PLAYING">
<doc xml:space="preserve">Use this flag on GObject properties of GstElements to indicate that
they can be changed when the element is in the PLAYING or lower state.
This flag implies GST_PARAM_MUTABLE_PAUSED.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="PARAM_MUTABLE_READY" value="1024" c:type="GST_PARAM_MUTABLE_READY">
<doc xml:space="preserve">Use this flag on GObject properties of GstElements to indicate that
they can be changed when the element is in the READY or lower state.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="PARAM_SPEC_ARRAY_LIST" c:identifier="GST_PARAM_SPEC_ARRAY_LIST" introspectable="0">
<parameters>
<parameter name="pspec">
</parameter>
</parameters>
</function-macro>
<function-macro name="PARAM_SPEC_FRACTION" c:identifier="GST_PARAM_SPEC_FRACTION" introspectable="0">
<parameters>
<parameter name="pspec">
</parameter>
</parameters>
</function-macro>
<constant name="PARAM_USER_SHIFT" value="65536" c:type="GST_PARAM_USER_SHIFT">
<doc xml:space="preserve">Bits based on GST_PARAM_USER_SHIFT can be used by 3rd party applications.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="PIPELINE" c:identifier="GST_PIPELINE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PIPELINE_CAST" c:identifier="GST_PIPELINE_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PIPELINE_CLASS" c:identifier="GST_PIPELINE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="PIPELINE_GET_CLASS" c:identifier="GST_PIPELINE_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN" c:identifier="GST_PLUGIN" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_CAST" c:identifier="GST_PLUGIN_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_CLASS" c:identifier="GST_PLUGIN_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_DEFINE" c:identifier="GST_PLUGIN_DEFINE" introspectable="0">
<doc xml:space="preserve">This macro needs to be used to define the entry point and meta data of a
plugin. One would use this macro to export a plugin, so that it can be used
by other applications.
The macro uses a define named PACKAGE for the #GstPluginDesc,source field.
When using autoconf, this is usually set automatically via the AC_INIT
macro, and set in config.h. If you are not using autoconf, you will need to
define PACKAGE yourself and set it to a short mnemonic string identifying
your application/package, e.g. 'someapp' or 'my-plugins-foo.
If defined, the GST_PACKAGE_RELEASE_DATETIME will also be used for the
#GstPluginDesc,release_datetime field.</doc>
<parameters>
<parameter name="major">
<doc xml:space="preserve">major version number of the gstreamer-core that plugin was compiled for</doc>
</parameter>
<parameter name="minor">
<doc xml:space="preserve">minor version number of the gstreamer-core that plugin was compiled for</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">short, but unique name of the plugin</doc>
</parameter>
<parameter name="description">
<doc xml:space="preserve">information about the purpose of the plugin</doc>
</parameter>
<parameter name="init">
<doc xml:space="preserve">function pointer to the plugin_init method with the signature of &lt;code&gt;static gboolean plugin_init (GstPlugin * plugin)&lt;/code&gt;.</doc>
</parameter>
<parameter name="version">
<doc xml:space="preserve">full version string (e.g. VERSION from config.h)</doc>
</parameter>
<parameter name="license">
<doc xml:space="preserve">under which licence the package has been released, e.g. GPL, LGPL.</doc>
</parameter>
<parameter name="package">
<doc xml:space="preserve">the package-name (e.g. PACKAGE_NAME from config.h)</doc>
</parameter>
<parameter name="origin">
<doc xml:space="preserve">a description from where the package comes from (e.g. the homepage URL)</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_FEATURE" c:identifier="GST_PLUGIN_FEATURE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_FEATURE_CAST" c:identifier="GST_PLUGIN_FEATURE_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_FEATURE_CLASS" c:identifier="GST_PLUGIN_FEATURE_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_FEATURE_GET_CLASS" c:identifier="GST_PLUGIN_FEATURE_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_FEATURE_LIST_DEBUG" c:identifier="GST_PLUGIN_FEATURE_LIST_DEBUG" introspectable="0">
<doc xml:space="preserve">Debug the plugin feature names in @list.</doc>
<parameters>
<parameter name="list">
<doc xml:space="preserve">a #GList of
plugin features</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_GET_CLASS" c:identifier="GST_PLUGIN_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_STATIC_DECLARE" c:identifier="GST_PLUGIN_STATIC_DECLARE" version="1.2" introspectable="0">
<doc xml:space="preserve">This macro can be used to initialize statically linked plugins. It is
necessary to call this macro before the plugin can be used.
It has to be used in combination with GST_PLUGIN_STATIC_REGISTER
and must be placed outside any block to declare the plugin initialization
function.</doc>
<parameters>
<parameter name="name">
<doc xml:space="preserve">short, but unique name of the plugin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PLUGIN_STATIC_REGISTER" c:identifier="GST_PLUGIN_STATIC_REGISTER" version="1.2" introspectable="0">
<doc xml:space="preserve">This macro can be used to initialize statically linked plugins. It is
necessary to call this macro before the plugin can be used.
It has to be used in combination with GST_PLUGIN_STATIC_DECLARE and
calls the plugin initialization function.</doc>
<parameters>
<parameter name="name">
<doc xml:space="preserve">short, but unique name of the plugin</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="PRESET" c:identifier="GST_PRESET" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PRESET_GET_INTERFACE" c:identifier="GST_PRESET_GET_INTERFACE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PROMISE" c:identifier="GST_PROMISE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="PROTECTION_SYSTEM_ID_CAPS_FIELD" value="protection-system" c:type="GST_PROTECTION_SYSTEM_ID_CAPS_FIELD" version="1.6">
<doc xml:space="preserve">The field name in a GstCaps that is used to signal the UUID of the protection
system.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="PROTECTION_UNSPECIFIED_SYSTEM_ID" value="unspecified-system-id" c:type="GST_PROTECTION_UNSPECIFIED_SYSTEM_ID" version="1.16">
<doc xml:space="preserve">The protection system value of the unspecified UUID.
In some cases the system protection ID is not present in the contents or in their
metadata, as encrypted WebM.
This define is used to set the value of the "system_id" field in GstProtectionEvent,
with this value, the application will use an external information to choose which
protection system to use.
Example: The matroskademux uses this value in the case of encrypted WebM,
the application will choose the appropriate protection system based on the information
received through EME API.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="PROXY_PAD" c:identifier="GST_PROXY_PAD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="PROXY_PAD_CLASS" c:identifier="GST_PROXY_PAD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<constant name="PTR_FORMAT" value="paA" c:type="GST_PTR_FORMAT" introspectable="0">
<doc xml:space="preserve">printf format type used to debug GStreamer types. You can use this in
combination with GStreamer's debug logging system as well as the functions
gst_info_vasprintf(), gst_info_strdup_vprintf() and gst_info_strdup_printf()
to pretty-print the following types: #GstCaps, #GstStructure,
#GstCapsFeatures, #GstTagList, #GstDateTime, #GstBuffer, #GstBufferList,
#GstMessage, #GstEvent, #GstQuery, #GstContext, #GstPad, #GstObject. All
#GObject types will be printed as typename plus pointer, and everything
else will simply be printed as pointer address.
This can only be used on types whose size is &gt;= sizeof(gpointer).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<class name="Pad" c:symbol-prefix="pad" c:type="GstPad" parent="Object" glib:type-name="GstPad" glib:get-type="gst_pad_get_type" glib:type-struct="PadClass">
<doc xml:space="preserve">A #GstElement is linked to other elements via "pads", which are extremely
light-weight generic link points.
Pads have a #GstPadDirection, source pads produce data, sink pads consume
data.
Pads are typically created from a #GstPadTemplate with
gst_pad_new_from_template() and are then added to a #GstElement. This usually
happens when the element is created but it can also happen dynamically based
on the data that the element is processing or based on the pads that the
application requests.
Pads without pad templates can be created with gst_pad_new(),
which takes a direction and a name as an argument. If the name is %NULL,
then a guaranteed unique name will be assigned to it.
A #GstElement creating a pad will typically use the various
gst_pad_set_*_function\() calls to register callbacks for events, queries or
dataflow on the pads.
gst_pad_get_parent() will retrieve the #GstElement that owns the pad.
After two pads are retrieved from an element by gst_element_get_static_pad(),
the pads can be linked with gst_pad_link(). (For quick links,
you can also use gst_element_link(), which will make the obvious
link for you if it's straightforward.). Pads can be unlinked again with
gst_pad_unlink(). gst_pad_get_peer() can be used to check what the pad is
linked to.
Before dataflow is possible on the pads, they need to be activated with
gst_pad_set_active().
gst_pad_query() and gst_pad_peer_query() can be used to query various
properties of the pad and the stream.
To send a #GstEvent on a pad, use gst_pad_send_event() and
gst_pad_push_event(). Some events will be sticky on the pad, meaning that
after they pass on the pad they can be queried later with
gst_pad_get_sticky_event() and gst_pad_sticky_events_foreach().
gst_pad_get_current_caps() and gst_pad_has_current_caps() are convenience
functions to query the current sticky CAPS event on a pad.
GstElements will use gst_pad_push() and gst_pad_pull_range() to push out
or pull in a buffer.
The dataflow, events and queries that happen on a pad can be monitored with
probes that can be installed with gst_pad_add_probe(). gst_pad_is_blocked()
can be used to check if a block probe is installed on the pad.
gst_pad_is_blocking() checks if the blocking probe is currently blocking the
pad. gst_pad_remove_probe() is used to remove a previously installed probe
and unblock blocking probes if any.
Pad have an offset that can be retrieved with gst_pad_get_offset(). This
offset will be applied to the running_time of all data passing over the pad.
gst_pad_set_offset() can be used to change the offset.
Convenience functions exist to start, pause and stop the task on a pad with
gst_pad_start_task(), gst_pad_pause_task() and gst_pad_stop_task()
respectively.</doc>
<constructor name="new" c:identifier="gst_pad_new">
<doc xml:space="preserve">Creates a new pad with the given name in the given direction.
If name is %NULL, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new #GstPad.
MT safe.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the new pad.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="direction" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadDirection of the pad.</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_static_template" c:identifier="gst_pad_new_from_static_template">
<doc xml:space="preserve">Creates a new pad with the given name from the given static template.
If name is %NULL, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the #GstStaticPadTemplate to use</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the pad</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_template" c:identifier="gst_pad_new_from_template">
<doc xml:space="preserve">Creates a new pad with the given name from the given template.
If name is %NULL, a guaranteed unique name (across all pads)
will be assigned.
This function makes a copy of the name so you can safely free the name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the pad template to use</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the name of the pad</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<function name="link_get_name" c:identifier="gst_pad_link_get_name" version="1.4">
<doc xml:space="preserve">Gets a string representing the given pad-link return.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a static string with the name of the pad-link return.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadLinkReturn to get the name of.</doc>
<type name="PadLinkReturn" c:type="GstPadLinkReturn"/>
</parameter>
</parameters>
</function>
<virtual-method name="linked">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="peer" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="unlinked">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="peer" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<method name="activate_mode" c:identifier="gst_pad_activate_mode">
<doc xml:space="preserve">Activates or deactivates the given pad in @mode via dispatching to the
pad's activatemodefunc. For use from within pad activation functions only.
If you don't know what this is, you probably don't want to call it.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the operation was successful.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to activate or deactivate.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the requested activation mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">whether or not the pad should be active.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="add_probe" c:identifier="gst_pad_add_probe">
<doc xml:space="preserve">Be notified of different states of pads. The provided callback is called for
every state that matches @mask.
Probes are called in groups: First GST_PAD_PROBE_TYPE_BLOCK probes are
called, then others, then finally GST_PAD_PROBE_TYPE_IDLE. The only
exception here are GST_PAD_PROBE_TYPE_IDLE probes that are called
immediately if the pad is already idle while calling gst_pad_add_probe().
In each of the groups, probes are called in the order in which they were
added.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">an id or 0 if no probe is pending. The id can be used to remove the
probe with gst_pad_remove_probe(). When using GST_PAD_PROBE_TYPE_IDLE it can
happen that the probe can be run immediately and if the probe returns
GST_PAD_PROBE_REMOVE this functions returns 0.
MT safe.</doc>
<type name="gulong" c:type="gulong"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to add the probe to</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="mask" transfer-ownership="none">
<doc xml:space="preserve">the probe mask</doc>
<type name="PadProbeType" c:type="GstPadProbeType"/>
</parameter>
<parameter name="callback" transfer-ownership="none" scope="notified" closure="2" destroy="3">
<doc xml:space="preserve">#GstPadProbeCallback that will be called with notifications of
the pad state</doc>
<type name="PadProbeCallback" c:type="GstPadProbeCallback"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the callback</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="destroy_data" transfer-ownership="none" scope="async">
<doc xml:space="preserve">#GDestroyNotify for user_data</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="can_link" c:identifier="gst_pad_can_link">
<doc xml:space="preserve">Checks if the source pad and the sink pad are compatible so they can be
linked.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads can be linked.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="srcpad" transfer-ownership="none">
<doc xml:space="preserve">the source #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sinkpad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="chain" c:identifier="gst_pad_chain">
<doc xml:space="preserve">Chain a buffer to @pad.
The function returns #GST_FLOW_FLUSHING if the pad was flushing.
If the buffer type is not acceptable for @pad (as negotiated with a
preceding GST_EVENT_CAPS event), this function returns
#GST_FLOW_NOT_NEGOTIATED.
The function proceeds calling the chain function installed on @pad (see
gst_pad_set_chain_function()) and the return value of that function is
returned to the caller. #GST_FLOW_NOT_SUPPORTED is returned if @pad has no
chain function.
In all cases, success or failure, the caller loses its reference to @buffer
after calling this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.
MT safe.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad, returns GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">the #GstBuffer to send, return GST_FLOW_ERROR
if not.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="chain_list" c:identifier="gst_pad_chain_list">
<doc xml:space="preserve">Chain a bufferlist to @pad.
The function returns #GST_FLOW_FLUSHING if the pad was flushing.
If @pad was not negotiated properly with a CAPS event, this function
returns #GST_FLOW_NOT_NEGOTIATED.
The function proceeds calling the chainlist function installed on @pad (see
gst_pad_set_chain_list_function()) and the return value of that function is
returned to the caller. #GST_FLOW_NOT_SUPPORTED is returned if @pad has no
chainlist function.
In all cases, success or failure, the caller loses its reference to @list
after calling this function.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad, returns GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">the #GstBufferList to send, return GST_FLOW_ERROR
if not.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</parameter>
</parameters>
</method>
<method name="check_reconfigure" c:identifier="gst_pad_check_reconfigure">
<doc xml:space="preserve">Check and clear the #GST_PAD_FLAG_NEED_RECONFIGURE flag on @pad and return %TRUE
if the flag was set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE is the GST_PAD_FLAG_NEED_RECONFIGURE flag was set on @pad.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to check</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="create_stream_id" c:identifier="gst_pad_create_stream_id">
<doc xml:space="preserve">Creates a stream-id for the source #GstPad @pad by combining the
upstream information with the optional @stream_id of the stream
of @pad. @pad must have a parent #GstElement and which must have zero
or one sinkpad. @stream_id can only be %NULL if the parent element
of @pad has only a single source pad.
This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending @stream_id to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.
Since stream IDs are sorted alphabetically, any numbers in the
stream ID should be printed with a fixed number of characters,
preceded by 0's, such as by using the format \%03u instead of \%u.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A stream-id for @pad. g_free() after usage.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">A source #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">Parent #GstElement of @pad</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="stream_id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The stream-id</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="create_stream_id_printf" c:identifier="gst_pad_create_stream_id_printf" introspectable="0">
<doc xml:space="preserve">Creates a stream-id for the source #GstPad @pad by combining the
upstream information with the optional @stream_id of the stream
of @pad. @pad must have a parent #GstElement and which must have zero
or one sinkpad. @stream_id can only be %NULL if the parent element
of @pad has only a single source pad.
This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending @stream_id to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A stream-id for @pad. g_free() after usage.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">A source #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">Parent #GstElement of @pad</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="stream_id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The stream-id</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">parameters for the @stream_id format string</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="create_stream_id_printf_valist" c:identifier="gst_pad_create_stream_id_printf_valist" introspectable="0">
<doc xml:space="preserve">Creates a stream-id for the source #GstPad @pad by combining the
upstream information with the optional @stream_id of the stream
of @pad. @pad must have a parent #GstElement and which must have zero
or one sinkpad. @stream_id can only be %NULL if the parent element
of @pad has only a single source pad.
This function generates an unique stream-id by getting the upstream
stream-start event stream ID and appending @stream_id to it. If the
element has no sinkpad it will generate an upstream stream-id by
doing an URI query on the element and in the worst case just uses
a random number. Source elements that don't implement the URI
handler interface should ideally generate a unique, deterministic
stream-id manually instead.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A stream-id for @pad. g_free() after usage.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">A source #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">Parent #GstElement of @pad</doc>
<type name="Element" c:type="GstElement*"/>
</parameter>
<parameter name="stream_id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The stream-id</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">parameters for the @stream_id format string</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="event_default" c:identifier="gst_pad_event_default">
<doc xml:space="preserve">Invokes the default event handler for the given pad.
The EOS event will pause the task associated with @pad before it is forwarded
to all internally linked pads,
The event is sent to all pads internally linked to @pad. This function
takes ownership of @event.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was sent successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to call the default event handler on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to handle.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</method>
<method name="forward" c:identifier="gst_pad_forward">
<doc xml:space="preserve">Calls @forward for all internally linked pads of @pad. This function deals with
dynamically changing internal pads and will make sure that the @forward
function is only called once for each pad.
When @forward returns %TRUE, no further pads will be processed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if one of the dispatcher functions returned %TRUE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="forward" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a #GstPadForwardFunction</doc>
<type name="PadForwardFunction" c:type="GstPadForwardFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @forward</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get_allowed_caps" c:identifier="gst_pad_get_allowed_caps">
<doc xml:space="preserve">Gets the capabilities of the allowed media types that can flow through
@pad and its peer.
The allowed capabilities is calculated as the intersection of the results of
calling gst_pad_query_caps() on @pad and its peer. The caller owns a reference
on the resulting caps.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the allowed #GstCaps of the
pad link. Unref the caps when you no longer need it. This
function returns %NULL when @pad has no peer.
MT safe.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_current_caps" c:identifier="gst_pad_get_current_caps">
<doc xml:space="preserve">Gets the capabilities currently configured on @pad with the last
#GST_EVENT_CAPS event.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the current caps of the pad with
incremented ref-count or %NULL when pad has no caps. Unref after usage.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the current capabilities of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_direction" c:identifier="gst_pad_get_direction">
<doc xml:space="preserve">Gets the direction of the pad. The direction of the pad is
decided at construction time so this function does not take
the LOCK.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstPadDirection of the pad.
MT safe.</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the direction of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_element_private" c:identifier="gst_pad_get_element_private">
<doc xml:space="preserve">Gets the private data of a pad.
No locking is performed in this function.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #gpointer to the private data.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get the private data of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_last_flow_return" c:identifier="gst_pad_get_last_flow_return" version="1.4">
<doc xml:space="preserve">Gets the #GstFlowReturn return from the last data passed by this pad.</doc>
<return-value transfer-ownership="none">
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_offset" c:identifier="gst_pad_get_offset">
<doc xml:space="preserve">Get the offset applied to the running time of @pad. @pad has to be a source
pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the offset.</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_pad_template" c:identifier="gst_pad_get_pad_template">
<doc xml:space="preserve">Gets the template for @pad.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstPadTemplate from which
this pad was instantiated, or %NULL if this pad has no
template. Unref after usage.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_pad_template_caps" c:identifier="gst_pad_get_pad_template_caps">
<doc xml:space="preserve">Gets the capabilities for @pad's template.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps of this pad template.
Unref after usage.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the template capabilities from.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_parent_element" c:identifier="gst_pad_get_parent_element">
<doc xml:space="preserve">Gets the parent of @pad, cast to a #GstElement. If a @pad has no parent or
its parent is not an element, return %NULL.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the parent of the pad. The
caller has a reference on the parent, so unref when you're finished
with it.
MT safe.</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a pad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_peer" c:identifier="gst_pad_get_peer">
<doc xml:space="preserve">Gets the peer of @pad. This function refs the peer pad so
you need to unref it after use.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the peer #GstPad. Unref after usage.
MT safe.</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the peer of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_range" c:identifier="gst_pad_get_range">
<doc xml:space="preserve">When @pad is flushing this function returns #GST_FLOW_FLUSHING
immediately and @buffer is %NULL.
Calls the getrange function of @pad, see #GstPadGetRangeFunction for a
description of a getrange function. If @pad has no getrange function
installed (see gst_pad_set_getrange_function()) this function returns
#GST_FLOW_NOT_SUPPORTED.
If @buffer points to a variable holding %NULL, a valid new #GstBuffer will be
placed in @buffer when this function returns #GST_FLOW_OK. The new buffer
must be freed with gst_buffer_unref() after usage.
When @buffer points to a variable that points to a valid #GstBuffer, the
buffer will be filled with the result data when this function returns
#GST_FLOW_OK. If the provided buffer is larger than @size, only
@size bytes will be filled in the result buffer and its size will be updated
accordingly.
Note that less than @size bytes can be returned in @buffer when, for example,
an EOS condition is near or when @buffer is not large enough to hold @size
bytes. The caller should check the result buffer size to get the result size.
When this function returns any other result value than #GST_FLOW_OK, @buffer
will be unchanged.
This is a lowlevel function. Usually gst_pad_pull_range() is used.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.
MT safe.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a src #GstPad, returns #GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">The start offset of the buffer</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">The length of the buffer</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to hold the #GstBuffer,
returns #GST_FLOW_ERROR if %NULL.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
</parameters>
</method>
<method name="get_single_internal_link" c:identifier="gst_pad_get_single_internal_link" version="1.18">
<doc xml:space="preserve">If there is a single internal link of the given pad, this function will
return it. Otherwise, it will return NULL.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstPad, or %NULL if @pad has none
or more than one internal links. Unref returned pad with
gst_object_unref().</doc>
<type name="Pad" c:type="GstPad*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get the internal link of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_sticky_event" c:identifier="gst_pad_get_sticky_event">
<doc xml:space="preserve">Returns a new reference of the sticky event of type @event_type
from the event.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstEvent of type
@event_type or %NULL when no event of @event_type was on
@pad. Unref after usage.</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get the event from.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event_type" transfer-ownership="none">
<doc xml:space="preserve">the #GstEventType that should be retrieved.</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
<parameter name="idx" transfer-ownership="none">
<doc xml:space="preserve">the index of the event</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_stream" c:identifier="gst_pad_get_stream" version="1.10">
<doc xml:space="preserve">Returns the current #GstStream for the @pad, or %NULL if none has been
set yet, i.e. the pad has not received a stream-start event yet.
This is a convenience wrapper around gst_pad_get_sticky_event() and
gst_event_parse_stream().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the current #GstStream for @pad, or %NULL.
unref the returned stream when no longer needed.</doc>
<type name="Stream" c:type="GstStream*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">A source #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream_id" c:identifier="gst_pad_get_stream_id" version="1.2">
<doc xml:space="preserve">Returns the current stream-id for the @pad, or %NULL if none has been
set yet, i.e. the pad has not received a stream-start event yet.
This is a convenience wrapper around gst_pad_get_sticky_event() and
gst_event_parse_stream_start().
The returned stream-id string should be treated as an opaque string, its
contents should not be interpreted.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly-allocated copy of the stream-id for
@pad, or %NULL. g_free() the returned string when no longer
needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">A source #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_task_state" c:identifier="gst_pad_get_task_state" version="1.12">
<doc xml:space="preserve">Get @pad task state. If no task is currently
set, #GST_TASK_STOPPED is returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The current state of @pad's task.</doc>
<type name="TaskState" c:type="GstTaskState"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get task state from</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_current_caps" c:identifier="gst_pad_has_current_caps">
<doc xml:space="preserve">Check if @pad has caps set on it with a #GST_EVENT_CAPS event.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @pad has caps associated with it.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to check</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_active" c:identifier="gst_pad_is_active">
<doc xml:space="preserve">Query if a pad is active</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad is active.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to query</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_blocked" c:identifier="gst_pad_is_blocked">
<doc xml:space="preserve">Checks if the pad is blocked or not. This function returns the
last requested state of the pad. It is not certain that the pad
is actually blocking at this point (see gst_pad_is_blocking()).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad is blocked.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to query</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_blocking" c:identifier="gst_pad_is_blocking">
<doc xml:space="preserve">Checks if the pad is blocking or not. This is a guaranteed state
of whether the pad is actually blocking on a #GstBuffer or a #GstEvent.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad is blocking.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to query</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_linked" c:identifier="gst_pad_is_linked">
<doc xml:space="preserve">Checks if a @pad is linked to another pad or not.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad is linked, %FALSE otherwise.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">pad to check</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_internal_links" c:identifier="gst_pad_iterate_internal_links">
<doc xml:space="preserve">Gets an iterator for the pads to which the given pad is linked to inside
of the parent element.
Each #GstPad element yielded by the iterator will have its refcount increased,
so unref after use.
Free-function: gst_iterator_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstIterator of #GstPad
or %NULL when the pad does not have an iterator function
configured. Use gst_iterator_free() after usage.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the GstPad to get the internal links of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="iterate_internal_links_default" c:identifier="gst_pad_iterate_internal_links_default">
<doc xml:space="preserve">Iterate the list of pads to which the given pad is linked to inside of
the parent element.
This is the default handler, and thus returns an iterator of all of the
pads inside the parent element with opposite direction.
The caller must free this iterator after use with gst_iterator_free().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstPad, or %NULL if @pad
has no parent. Unref each returned pad with gst_object_unref().</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get the internal links of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</method>
<method name="link" c:identifier="gst_pad_link">
<doc xml:space="preserve">Links the source pad and the sink pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A result code indicating if the connection worked or
what went wrong.
MT Safe.</doc>
<type name="PadLinkReturn" c:type="GstPadLinkReturn"/>
</return-value>
<parameters>
<instance-parameter name="srcpad" transfer-ownership="none">
<doc xml:space="preserve">the source #GstPad to link.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sinkpad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad to link.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="link_full" c:identifier="gst_pad_link_full">
<doc xml:space="preserve">Links the source pad and the sink pad.
This variant of #gst_pad_link provides a more granular control on the
checks being done when linking. While providing some considerable speedups
the caller of this method must be aware that wrong usage of those flags
can cause severe issues. Refer to the documentation of #GstPadLinkCheck
for more information.
MT Safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A result code indicating if the connection worked or
what went wrong.</doc>
<type name="PadLinkReturn" c:type="GstPadLinkReturn"/>
</return-value>
<parameters>
<instance-parameter name="srcpad" transfer-ownership="none">
<doc xml:space="preserve">the source #GstPad to link.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sinkpad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad to link.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the checks to validate when linking</doc>
<type name="PadLinkCheck" c:type="GstPadLinkCheck"/>
</parameter>
</parameters>
</method>
<method name="link_maybe_ghosting" c:identifier="gst_pad_link_maybe_ghosting" version="1.10">
<doc xml:space="preserve">Links @src to @sink, creating any #GstGhostPad's in between as necessary.
This is a convenience function to save having to create and add intermediate
#GstGhostPad's as required for linking across #GstBin boundaries.
If @src or @sink pads don't have parent elements or do not share a common
ancestor, the link will fail.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">whether the link succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sink" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="link_maybe_ghosting_full" c:identifier="gst_pad_link_maybe_ghosting_full" version="1.10">
<doc xml:space="preserve">Links @src to @sink, creating any #GstGhostPad's in between as necessary.
This is a convenience function to save having to create and add intermediate
#GstGhostPad's as required for linking across #GstBin boundaries.
If @src or @sink pads don't have parent elements or do not share a common
ancestor, the link will fail.
Calling gst_pad_link_maybe_ghosting_full() with
@flags == %GST_PAD_LINK_CHECK_DEFAULT is the recommended way of linking
pads with safety checks applied.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">whether the link succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sink" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">some #GstPadLinkCheck flags</doc>
<type name="PadLinkCheck" c:type="GstPadLinkCheck"/>
</parameter>
</parameters>
</method>
<method name="mark_reconfigure" c:identifier="gst_pad_mark_reconfigure">
<doc xml:space="preserve">Mark a pad for needing reconfiguration. The next call to
gst_pad_check_reconfigure() will return %TRUE after this call.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to mark</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="needs_reconfigure" c:identifier="gst_pad_needs_reconfigure">
<doc xml:space="preserve">Check the #GST_PAD_FLAG_NEED_RECONFIGURE flag on @pad and return %TRUE
if the flag was set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE is the GST_PAD_FLAG_NEED_RECONFIGURE flag is set on @pad.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to check</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="pause_task" c:identifier="gst_pad_pause_task">
<doc xml:space="preserve">Pause the task of @pad. This function will also wait until the
function executed by the task is finished if this function is not
called from the task function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %TRUE if the task could be paused or %FALSE when the pad
has no task.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to pause the task of</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="peer_query" c:identifier="gst_pad_peer_query">
<doc xml:space="preserve">Performs gst_pad_query() on the peer of @pad.
The caller is responsible for both the allocation and deallocation of
the query structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed. This function returns %FALSE
if @pad has no peer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to invoke the peer query on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery to perform.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="peer_query_accept_caps" c:identifier="gst_pad_peer_query_accept_caps">
<doc xml:space="preserve">Check if the peer of @pad accepts @caps. If @pad has no peer, this function
returns %TRUE.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the peer of @pad can accept the caps or @pad has no peer.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to check the peer of</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to check on the pad</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="peer_query_caps" c:identifier="gst_pad_peer_query_caps">
<doc xml:space="preserve">Gets the capabilities of the peer connected to this pad. Similar to
gst_pad_query_caps().
When called on srcpads @filter contains the caps that
upstream could produce in the order preferred by upstream. When
called on sinkpads @filter contains the caps accepted by
downstream in the preferred order. @filter might be %NULL but
if it is not %NULL the returned caps will be a subset of @filter.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the caps of the peer pad with incremented
ref-count. When there is no peer pad, this function returns @filter or,
when @filter is %NULL, ANY caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the capabilities of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="filter" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstCaps filter, or %NULL.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="peer_query_convert" c:identifier="gst_pad_peer_query_convert">
<doc xml:space="preserve">Queries the peer pad of a given sink pad to convert @src_val in @src_format
to @dest_format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad, on whose peer pad to invoke the convert query on.
Must be a sink pad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="src_format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat to convert from.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="src_val" transfer-ownership="none">
<doc xml:space="preserve">a value to convert.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="dest_format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat to convert to.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="dest_val" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to the result.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="peer_query_duration" c:identifier="gst_pad_peer_query_duration">
<doc xml:space="preserve">Queries the peer pad of a given sink pad for the total stream duration.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad on whose peer pad to invoke the duration query on.
Must be a sink pad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location in which to store the total
duration, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="peer_query_position" c:identifier="gst_pad_peer_query_position">
<doc xml:space="preserve">Queries the peer of a given sink pad for the stream position.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad on whose peer to invoke the position query on.
Must be a sink pad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="cur" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location in which to store the current
position, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="proxy_query_accept_caps" c:identifier="gst_pad_proxy_query_accept_caps">
<doc xml:space="preserve">Checks if all internally linked pads of @pad accepts the caps in @query and
returns the intersection of the results.
This function is useful as a default accept caps query function for an element
that can handle any stream format, but requires caps that are acceptable for
all opposite pads.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @query could be executed</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to proxy.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">an ACCEPT_CAPS #GstQuery.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="proxy_query_caps" c:identifier="gst_pad_proxy_query_caps">
<doc xml:space="preserve">Calls gst_pad_query_caps() for all internally linked pads of @pad and returns
the intersection of the results.
This function is useful as a default caps query function for an element
that can handle any stream format, but requires all its pads to have
the same caps. Two such elements are tee and adder.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @query could be executed</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to proxy.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a CAPS #GstQuery.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="pull_range" c:identifier="gst_pad_pull_range">
<doc xml:space="preserve">Pulls a @buffer from the peer pad or fills up a provided buffer.
This function will first trigger the pad block signal if it was
installed.
When @pad is not linked #GST_FLOW_NOT_LINKED is returned else this
function returns the result of gst_pad_get_range() on the peer pad.
See gst_pad_get_range() for a list of return values and for the
semantics of the arguments of this function.
If @buffer points to a variable holding %NULL, a valid new #GstBuffer will be
placed in @buffer when this function returns #GST_FLOW_OK. The new buffer
must be freed with gst_buffer_unref() after usage. When this function
returns any other result value, @buffer will still point to %NULL.
When @buffer points to a variable that points to a valid #GstBuffer, the
buffer will be filled with the result data when this function returns
#GST_FLOW_OK. When this function returns any other result value,
@buffer will be unchanged. If the provided buffer is larger than @size, only
@size bytes will be filled in the result buffer and its size will be updated
accordingly.
Note that less than @size bytes can be returned in @buffer when, for example,
an EOS condition is near or when @buffer is not large enough to hold @size
bytes. The caller should check the result buffer size to get the result size.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the peer pad.
MT safe.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad, returns GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">The start offset of the buffer</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">The length of the buffer</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to hold the #GstBuffer, returns
GST_FLOW_ERROR if %NULL.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
</parameters>
</method>
<method name="push" c:identifier="gst_pad_push">
<doc xml:space="preserve">Pushes a buffer to the peer of @pad.
This function will call installed block probes before triggering any
installed data probes.
The function proceeds calling gst_pad_chain() on the peer pad and returns
the value from that function. If @pad has no peer, #GST_FLOW_NOT_LINKED will
be returned.
In all cases, success or failure, the caller loses its reference to @buffer
after calling this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the peer pad.
MT safe.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a source #GstPad, returns #GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">the #GstBuffer to push returns GST_FLOW_ERROR
if not.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="push_event" c:identifier="gst_pad_push_event">
<doc xml:space="preserve">Sends the event to the peer of the given pad. This function is
mainly used by elements to send events to their peer
elements.
This function takes ownership of the provided event so you should
gst_event_ref() it if you want to reuse the event after this call.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to push the event to.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to send to the pad.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</method>
<method name="push_list" c:identifier="gst_pad_push_list">
<doc xml:space="preserve">Pushes a buffer list to the peer of @pad.
This function will call installed block probes before triggering any
installed data probes.
The function proceeds calling the chain function on the peer pad and returns
the value from that function. If @pad has no peer, #GST_FLOW_NOT_LINKED will
be returned. If the peer pad does not have any installed chainlist function
every group buffer of the list will be merged into a normal #GstBuffer and
chained via gst_pad_chain().
In all cases, success or failure, the caller loses its reference to @list
after calling this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the peer pad.
MT safe.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a source #GstPad, returns #GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">the #GstBufferList to push returns GST_FLOW_ERROR
if not.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</parameter>
</parameters>
</method>
<method name="query" c:identifier="gst_pad_query">
<doc xml:space="preserve">Dispatches a query to a pad. The query should have been allocated by the
caller via one of the type-specific allocation functions. The element that
the pad belongs to is responsible for filling the query with an appropriate
response, which should then be parsed with a type-specific query parsing
function.
Again, the caller is responsible for both the allocation and deallocation of
the query structure.
Please also note that some queries might need a running pipeline to work.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to invoke the default query on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery to perform.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="query_accept_caps" c:identifier="gst_pad_query_accept_caps">
<doc xml:space="preserve">Check if the given pad accepts the caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad can accept the caps.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to check</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps to check on the pad</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="query_caps" c:identifier="gst_pad_query_caps">
<doc xml:space="preserve">Gets the capabilities this pad can produce or consume.
Note that this method doesn't necessarily return the caps set by sending a
gst_event_new_caps() - use gst_pad_get_current_caps() for that instead.
gst_pad_query_caps returns all possible caps a pad can operate with, using
the pad's CAPS query function, If the query fails, this function will return
@filter, if not %NULL, otherwise ANY.
When called on sinkpads @filter contains the caps that
upstream could produce in the order preferred by upstream. When
called on srcpads @filter contains the caps accepted by
downstream in the preferred order. @filter might be %NULL but
if it is not %NULL the returned caps will be a subset of @filter.
Note that this function does not return writable #GstCaps, use
gst_caps_make_writable() before modifying the caps.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the caps of the pad with incremented ref-count.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to get the capabilities of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="filter" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">suggested #GstCaps, or %NULL</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="query_convert" c:identifier="gst_pad_query_convert">
<doc xml:space="preserve">Queries a pad to convert @src_val in @src_format to @dest_format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to invoke the convert query on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="src_format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat to convert from.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="src_val" transfer-ownership="none">
<doc xml:space="preserve">a value to convert.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="dest_format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat to convert to.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="dest_val" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to the result.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="query_default" c:identifier="gst_pad_query_default">
<doc xml:space="preserve">Invokes the default query handler for the given pad.
The query is sent to all pads internally linked to @pad. Note that
if there are many possible sink pads that are internally linked to
@pad, only one will be sent the query.
Multi-sinkpad elements should implement custom query handlers.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query was performed successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to call the default query handler on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery to handle.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</method>
<method name="query_duration" c:identifier="gst_pad_query_duration">
<doc xml:space="preserve">Queries a pad for the total stream duration.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to invoke the duration query on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a location in which to store the total
duration, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="query_position" c:identifier="gst_pad_query_position">
<doc xml:space="preserve">Queries a pad for the stream position.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to invoke the position query on.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat requested</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="cur" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">A location in which to store the current position, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="remove_probe" c:identifier="gst_pad_remove_probe">
<doc xml:space="preserve">Remove the probe with @id from @pad.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad with the probe</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="id" transfer-ownership="none">
<doc xml:space="preserve">the probe id to remove</doc>
<type name="gulong" c:type="gulong"/>
</parameter>
</parameters>
</method>
<method name="send_event" c:identifier="gst_pad_send_event">
<doc xml:space="preserve">Sends the event to the pad. This function can be used
by applications to send events in the pipeline.
If @pad is a source pad, @event should be an upstream event. If @pad is a
sink pad, @event should be a downstream event. For example, you would not
send a #GST_EVENT_EOS on a src pad; EOS events only propagate downstream.
Furthermore, some downstream events have to be serialized with data flow,
like EOS, while some can travel out-of-band, like #GST_EVENT_FLUSH_START. If
the event needs to be serialized with data flow, this function will take the
pad's stream lock while calling its event function.
To find out whether an event type is upstream, downstream, or downstream and
serialized, see #GstEventTypeFlags, gst_event_type_get_flags(),
#GST_EVENT_IS_UPSTREAM, #GST_EVENT_IS_DOWNSTREAM, and
#GST_EVENT_IS_SERIALIZED. Note that in practice that an application or
plugin doesn't need to bother itself with this information; the core handles
all necessary locks and checks.
This function takes ownership of the provided event so you should
gst_event_ref() it if you want to reuse the event after this call.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the event was handled.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad to send the event to.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to send to the pad.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</method>
<method name="set_activate_function_full" c:identifier="gst_pad_set_activate_function_full">
<doc xml:space="preserve">Sets the given activate function for @pad. The activate function will
dispatch to gst_pad_activate_mode() to perform the actual activation.
Only makes sense to set on sink pads.
Call this function if your sink pad can start a pull-based task.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="activate" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadActivateFunction to set.</doc>
<type name="PadActivateFunction" c:type="GstPadActivateFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @activate will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_activatemode_function_full" c:identifier="gst_pad_set_activatemode_function_full">
<doc xml:space="preserve">Sets the given activate_mode function for the pad. An activate_mode function
prepares the element for data passing.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="activatemode" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadActivateModeFunction to set.</doc>
<type name="PadActivateModeFunction" c:type="GstPadActivateModeFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @activatemode will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_active" c:identifier="gst_pad_set_active">
<doc xml:space="preserve">Activates or deactivates the given pad.
Normally called from within core state change functions.
If @active, makes sure the pad is active. If it is already active, either in
push or pull mode, just return. Otherwise dispatches to the pad's activate
function to perform the actual activation.
If not @active, calls gst_pad_activate_mode() with the pad's current mode
and a %FALSE argument.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the operation was successful.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to activate or deactivate.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">whether or not the pad should be active.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_chain_function_full" c:identifier="gst_pad_set_chain_function_full">
<doc xml:space="preserve">Sets the given chain function for the pad. The chain function is called to
process a #GstBuffer input buffer. see #GstPadChainFunction for more details.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="chain" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadChainFunction to set.</doc>
<type name="PadChainFunction" c:type="GstPadChainFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @chain will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_chain_list_function_full" c:identifier="gst_pad_set_chain_list_function_full">
<doc xml:space="preserve">Sets the given chain list function for the pad. The chainlist function is
called to process a #GstBufferList input buffer list. See
#GstPadChainListFunction for more details.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="chainlist" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadChainListFunction to set.</doc>
<type name="PadChainListFunction" c:type="GstPadChainListFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @chainlist will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_element_private" c:identifier="gst_pad_set_element_private">
<doc xml:space="preserve">Set the given private data gpointer on the pad.
This function can only be used by the element that owns the pad.
No locking is performed in this function.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to set the private data of.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="priv" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The private data to attach to the pad.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="set_event_full_function_full" c:identifier="gst_pad_set_event_full_function_full" version="1.8">
<doc xml:space="preserve">Sets the given event handler for the pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadEventFullFunction to set.</doc>
<type name="PadEventFullFunction" c:type="GstPadEventFullFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @event will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_event_function_full" c:identifier="gst_pad_set_event_function_full">
<doc xml:space="preserve">Sets the given event handler for the pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadEventFunction to set.</doc>
<type name="PadEventFunction" c:type="GstPadEventFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @event will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_getrange_function_full" c:identifier="gst_pad_set_getrange_function_full">
<doc xml:space="preserve">Sets the given getrange function for the pad. The getrange function is
called to produce a new #GstBuffer to start the processing pipeline. see
#GstPadGetRangeFunction for a description of the getrange function.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a source #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="get" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadGetRangeFunction to set.</doc>
<type name="PadGetRangeFunction" c:type="GstPadGetRangeFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @get will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_iterate_internal_links_function_full" c:identifier="gst_pad_set_iterate_internal_links_function_full">
<doc xml:space="preserve">Sets the given internal link iterator function for the pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="iterintlink" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadIterIntLinkFunction to set.</doc>
<type name="PadIterIntLinkFunction" c:type="GstPadIterIntLinkFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @iterintlink will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_link_function_full" c:identifier="gst_pad_set_link_function_full">
<doc xml:space="preserve">Sets the given link function for the pad. It will be called when
the pad is linked with another pad.
The return value #GST_PAD_LINK_OK should be used when the connection can be
made.
The return value #GST_PAD_LINK_REFUSED should be used when the connection
cannot be made for some reason.
If @link is installed on a source pad, it should call the #GstPadLinkFunction
of the peer sink pad, if present.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="link" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadLinkFunction to set.</doc>
<type name="PadLinkFunction" c:type="GstPadLinkFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @link will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_offset" c:identifier="gst_pad_set_offset">
<doc xml:space="preserve">Set the offset that will be applied to the running time of @pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_query_function_full" c:identifier="gst_pad_set_query_function_full">
<doc xml:space="preserve">Set the given query function for the pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadQueryFunction to set.</doc>
<type name="PadQueryFunction" c:type="GstPadQueryFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @query will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_unlink_function_full" c:identifier="gst_pad_set_unlink_function_full">
<doc xml:space="preserve">Sets the given unlink function for the pad. It will be called
when the pad is unlinked.
Note that the pad's lock is already held when the unlink
function is called, so most pad functions cannot be called
from within the callback.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="unlink" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the #GstPadUnlinkFunction to set.</doc>
<type name="PadUnlinkFunction" c:type="GstPadUnlinkFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user_data passed to @notify</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notify called when @unlink will not be used anymore.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="start_task" c:identifier="gst_pad_start_task">
<doc xml:space="preserve">Starts a task that repeatedly calls @func with @user_data. This function
is mostly used in pad activation functions to start the dataflow.
The #GST_PAD_STREAM_LOCK of @pad will automatically be acquired
before @func is called.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %TRUE if the task could be started.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to start the task of</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the task function to call</doc>
<type name="TaskFunction" c:type="GstTaskFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the task function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">called when @user_data is no longer referenced</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="sticky_events_foreach" c:identifier="gst_pad_sticky_events_foreach">
<doc xml:space="preserve">Iterates all sticky events on @pad and calls @foreach_func for every
event. If @foreach_func returns %FALSE the iteration is immediately stopped.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that should be used for iteration.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="foreach_func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">the #GstPadStickyEventsForeachFunction that
should be called for every event.</doc>
<type name="PadStickyEventsForeachFunction" c:type="GstPadStickyEventsForeachFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the optional user data.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="stop_task" c:identifier="gst_pad_stop_task">
<doc xml:space="preserve">Stop the task of @pad. This function will also make sure that the
function executed by the task will effectively stop if not called
from the GstTaskFunction.
This function will deadlock if called from the GstTaskFunction of
the task. Use gst_task_pause() instead.
Regardless of whether the pad has a task, the stream lock is acquired and
released so as to ensure that streaming through this pad has finished.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a %TRUE if the task could be stopped or %FALSE on error.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to stop the task of</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<method name="store_sticky_event" c:identifier="gst_pad_store_sticky_event" version="1.2">
<doc xml:space="preserve">Store the sticky @event on @pad</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">#GST_FLOW_OK on success, #GST_FLOW_FLUSHING when the pad
was flushing or #GST_FLOW_EOS when the pad was EOS.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="event" transfer-ownership="none">
<doc xml:space="preserve">a #GstEvent</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</method>
<method name="unlink" c:identifier="gst_pad_unlink">
<doc xml:space="preserve">Unlinks the source pad from the sink pad. Will emit the #GstPad::unlinked
signal on both pads.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pads were unlinked. This function returns %FALSE if
the pads were not linked together.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="srcpad" transfer-ownership="none">
<doc xml:space="preserve">the source #GstPad to unlink.</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
<parameter name="sinkpad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad to unlink.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="use_fixed_caps" c:identifier="gst_pad_use_fixed_caps">
<doc xml:space="preserve">A helper function you can use that sets the FIXED_CAPS flag
This way the default CAPS query will always return the negotiated caps
or in case the pad is not negotiated, the padtemplate caps.
The negotiated caps are the caps of the last CAPS event that passed on the
pad. Use this function on a pad that, once it negotiated to a CAPS, cannot
be renegotiated to something else.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the pad to use</doc>
<type name="Pad" c:type="GstPad*"/>
</instance-parameter>
</parameters>
</method>
<property name="caps" transfer-ownership="none">
<type name="Caps"/>
</property>
<property name="direction" writable="1" construct-only="1" transfer-ownership="none">
<type name="PadDirection"/>
</property>
<property name="offset" version="1.6" writable="1" transfer-ownership="none">
<doc xml:space="preserve">The offset that will be applied to the running time of the pad.</doc>
<type name="gint64" c:type="gint64"/>
</property>
<property name="template" writable="1" transfer-ownership="none">
<type name="PadTemplate"/>
</property>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="element_private">
<doc xml:space="preserve">private data owned by the parent element</doc>
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="padtemplate">
<doc xml:space="preserve">padtemplate for this pad</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</field>
<field name="direction">
<doc xml:space="preserve">the direction of the pad, cannot change after creating
the pad.</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</field>
<field name="stream_rec_lock" readable="0" private="1">
<type name="GLib.RecMutex" c:type="GRecMutex"/>
</field>
<field name="task" readable="0" private="1">
<type name="Task" c:type="GstTask*"/>
</field>
<field name="block_cond" readable="0" private="1">
<type name="GLib.Cond" c:type="GCond"/>
</field>
<field name="probes" readable="0" private="1">
<type name="GLib.HookList" c:type="GHookList"/>
</field>
<field name="mode" readable="0" private="1">
<type name="PadMode" c:type="GstPadMode"/>
</field>
<field name="activatefunc" readable="0" private="1">
<type name="PadActivateFunction" c:type="GstPadActivateFunction"/>
</field>
<field name="activatedata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="activatenotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="activatemodefunc" readable="0" private="1">
<type name="PadActivateModeFunction" c:type="GstPadActivateModeFunction"/>
</field>
<field name="activatemodedata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="activatemodenotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="peer" readable="0" private="1">
<type name="Pad" c:type="GstPad*"/>
</field>
<field name="linkfunc" readable="0" private="1">
<type name="PadLinkFunction" c:type="GstPadLinkFunction"/>
</field>
<field name="linkdata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="linknotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="unlinkfunc" readable="0" private="1">
<type name="PadUnlinkFunction" c:type="GstPadUnlinkFunction"/>
</field>
<field name="unlinkdata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="unlinknotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="chainfunc" readable="0" private="1">
<type name="PadChainFunction" c:type="GstPadChainFunction"/>
</field>
<field name="chaindata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="chainnotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="chainlistfunc" readable="0" private="1">
<type name="PadChainListFunction" c:type="GstPadChainListFunction"/>
</field>
<field name="chainlistdata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="chainlistnotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="getrangefunc" readable="0" private="1">
<type name="PadGetRangeFunction" c:type="GstPadGetRangeFunction"/>
</field>
<field name="getrangedata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="getrangenotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="eventfunc" readable="0" private="1">
<type name="PadEventFunction" c:type="GstPadEventFunction"/>
</field>
<field name="eventdata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="eventnotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="offset" readable="0" private="1">
<type name="gint64" c:type="gint64"/>
</field>
<field name="queryfunc" readable="0" private="1">
<type name="PadQueryFunction" c:type="GstPadQueryFunction"/>
</field>
<field name="querydata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="querynotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="iterintlinkfunc" readable="0" private="1">
<type name="PadIterIntLinkFunction" c:type="GstPadIterIntLinkFunction"/>
</field>
<field name="iterintlinkdata" readable="0" private="1">
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="iterintlinknotify" readable="0" private="1">
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="num_probes" readable="0" private="1">
<type name="gint" c:type="gint"/>
</field>
<field name="num_blocked" readable="0" private="1">
<type name="gint" c:type="gint"/>
</field>
<field name="priv" readable="0" private="1">
<type name="PadPrivate" c:type="GstPadPrivate*"/>
</field>
<union name="ABI" c:type="ABI">
<field name="_gst_reserved" writable="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<record name="abi" c:type="abi">
<field name="last_flowret" writable="1">
<type name="FlowReturn" c:type="GstFlowReturn"/>
</field>
<field name="eventfullfunc" writable="1">
<type name="PadEventFullFunction" c:type="GstPadEventFullFunction"/>
</field>
</record>
</union>
<glib:signal name="linked" when="last">
<doc xml:space="preserve">Signals that a pad has been linked to the peer pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="peer" transfer-ownership="none">
<doc xml:space="preserve">the peer pad that has been connected</doc>
<type name="Pad"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="unlinked" when="last">
<doc xml:space="preserve">Signals that a pad has been unlinked from the peer pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="peer" transfer-ownership="none">
<doc xml:space="preserve">the peer pad that has been disconnected</doc>
<type name="Pad"/>
</parameter>
</parameters>
</glib:signal>
</class>
<callback name="PadActivateFunction" c:type="GstPadActivateFunction">
<doc xml:space="preserve">This function is called when the pad is activated during the element
READY to PAUSED state change. By default this function will call the
activate function that puts the pad in push mode but elements can
override this function to activate the pad in pull mode if they wish.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad could be activated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent of @pad</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</callback>
<callback name="PadActivateModeFunction" c:type="GstPadActivateModeFunction">
<doc xml:space="preserve">The prototype of the push and pull activate functions.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad could be activated or deactivated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a #GstPad</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent of @pad</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the requested activation mode of @pad</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">activate or deactivate the pad.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</callback>
<callback name="PadChainFunction" c:type="GstPadChainFunction">
<doc xml:space="preserve">A function that will be called on sinkpads when chaining buffers.
The function typically processes the data contained in the buffer and
either consumes the data or passes it on to the internally linked pad(s).
The implementer of this function receives a refcount to @buffer and should
gst_buffer_unref() when the buffer is no longer needed.
When a chain function detects an error in the data stream, it must post an
error on the bus and return an appropriate #GstFlowReturn value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">#GST_FLOW_OK for success</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad that performed the chain.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">the #GstBuffer that is chained, not %NULL.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</callback>
<callback name="PadChainListFunction" c:type="GstPadChainListFunction">
<doc xml:space="preserve">A function that will be called on sinkpads when chaining buffer lists.
The function typically processes the data contained in the buffer list and
either consumes the data or passes it on to the internally linked pad(s).
The implementer of this function receives a refcount to @list and
should gst_buffer_list_unref() when the list is no longer needed.
When a chainlist function detects an error in the data stream, it must
post an error on the bus and return an appropriate #GstFlowReturn value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">#GST_FLOW_OK for success</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the sink #GstPad that performed the chain.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">the #GstBufferList that is chained, not %NULL.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</parameter>
</parameters>
</callback>
<record name="PadClass" c:type="GstPadClass" glib:is-gtype-struct-for="Pad">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="linked">
<callback name="linked">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="peer" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="unlinked">
<callback name="unlinked">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="peer" transfer-ownership="none">
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<enumeration name="PadDirection" glib:type-name="GstPadDirection" glib:get-type="gst_pad_direction_get_type" c:type="GstPadDirection">
<doc xml:space="preserve">The direction of a pad.</doc>
<member name="unknown" value="0" c:identifier="GST_PAD_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">direction is unknown.</doc>
</member>
<member name="src" value="1" c:identifier="GST_PAD_SRC" glib:nick="src">
<doc xml:space="preserve">the pad is a source pad.</doc>
</member>
<member name="sink" value="2" c:identifier="GST_PAD_SINK" glib:nick="sink">
<doc xml:space="preserve">the pad is a sink pad.</doc>
</member>
</enumeration>
<callback name="PadEventFullFunction" c:type="GstPadEventFullFunction" version="1.8">
<doc xml:space="preserve">Function signature to handle an event for the pad.
This variant is for specific elements that will take into account the
last downstream flow return (from a pad push), in which case they can
return it.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%GST_FLOW_OK if the event was handled properly, or any other
#GstFlowReturn dependent on downstream state.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to handle the event.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to handle.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</callback>
<callback name="PadEventFunction" c:type="GstPadEventFunction">
<doc xml:space="preserve">Function signature to handle an event for the pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the pad could handle the event.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to handle the event.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="event" transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent to handle.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</callback>
<bitfield name="PadFlags" glib:type-name="GstPadFlags" glib:get-type="gst_pad_flags_get_type" c:type="GstPadFlags">
<doc xml:space="preserve">Pad state flags</doc>
<member name="blocked" value="16" c:identifier="GST_PAD_FLAG_BLOCKED" glib:nick="blocked">
<doc xml:space="preserve">is dataflow on a pad blocked</doc>
</member>
<member name="flushing" value="32" c:identifier="GST_PAD_FLAG_FLUSHING" glib:nick="flushing">
<doc xml:space="preserve">is pad flushing</doc>
</member>
<member name="eos" value="64" c:identifier="GST_PAD_FLAG_EOS" glib:nick="eos">
<doc xml:space="preserve">is pad in EOS state</doc>
</member>
<member name="blocking" value="128" c:identifier="GST_PAD_FLAG_BLOCKING" glib:nick="blocking">
<doc xml:space="preserve">is pad currently blocking on a buffer or event</doc>
</member>
<member name="need_parent" value="256" c:identifier="GST_PAD_FLAG_NEED_PARENT" glib:nick="need-parent">
<doc xml:space="preserve">ensure that there is a parent object before calling
into the pad callbacks.</doc>
</member>
<member name="need_reconfigure" value="512" c:identifier="GST_PAD_FLAG_NEED_RECONFIGURE" glib:nick="need-reconfigure">
<doc xml:space="preserve">the pad should be reconfigured/renegotiated.
The flag has to be unset manually after
reconfiguration happened.</doc>
</member>
<member name="pending_events" value="1024" c:identifier="GST_PAD_FLAG_PENDING_EVENTS" glib:nick="pending-events">
<doc xml:space="preserve">the pad has pending events</doc>
</member>
<member name="fixed_caps" value="2048" c:identifier="GST_PAD_FLAG_FIXED_CAPS" glib:nick="fixed-caps">
<doc xml:space="preserve">the pad is using fixed caps. This means that
once the caps are set on the pad, the default caps query function
will only return those caps.</doc>
</member>
<member name="proxy_caps" value="4096" c:identifier="GST_PAD_FLAG_PROXY_CAPS" glib:nick="proxy-caps">
<doc xml:space="preserve">the default event and query handler will forward
all events and queries to the internally linked pads
instead of discarding them.</doc>
</member>
<member name="proxy_allocation" value="8192" c:identifier="GST_PAD_FLAG_PROXY_ALLOCATION" glib:nick="proxy-allocation">
<doc xml:space="preserve">the default query handler will forward
allocation queries to the internally linked pads
instead of discarding them.</doc>
</member>
<member name="proxy_scheduling" value="16384" c:identifier="GST_PAD_FLAG_PROXY_SCHEDULING" glib:nick="proxy-scheduling">
<doc xml:space="preserve">the default query handler will forward
scheduling queries to the internally linked pads
instead of discarding them.</doc>
</member>
<member name="accept_intersect" value="32768" c:identifier="GST_PAD_FLAG_ACCEPT_INTERSECT" glib:nick="accept-intersect">
<doc xml:space="preserve">the default accept-caps handler will check
it the caps intersect the query-caps result instead
of checking for a subset. This is interesting for
parsers that can accept incompletely specified caps.</doc>
</member>
<member name="accept_template" value="65536" c:identifier="GST_PAD_FLAG_ACCEPT_TEMPLATE" glib:nick="accept-template">
<doc xml:space="preserve">the default accept-caps handler will use
the template pad caps instead of query caps to
compare with the accept caps. Use this in combination
with %GST_PAD_FLAG_ACCEPT_INTERSECT. (Since: 1.6)</doc>
</member>
<member name="last" value="1048576" c:identifier="GST_PAD_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">offset to define more flags</doc>
</member>
</bitfield>
<callback name="PadForwardFunction" c:type="GstPadForwardFunction">
<doc xml:space="preserve">A forward function is called for all internally linked pads, see
gst_pad_forward().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the dispatching procedure has to be stopped.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that is forwarded.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">the gpointer to optional user data.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="PadGetRangeFunction" c:type="GstPadGetRangeFunction">
<doc xml:space="preserve">This function will be called on source pads when a peer element
request a buffer at the specified @offset and @length. If this function
returns #GST_FLOW_OK, the result buffer will be stored in @buffer. The
contents of @buffer is invalid for any other return value.
This function is installed on a source pad with
gst_pad_set_getrange_function() and can only be called on source pads after
they are successfully activated with gst_pad_activate_mode() with the
#GST_PAD_MODE_PULL.
@offset and @length are always given in byte units. @offset must normally be a value
between 0 and the length in bytes of the data available on @pad. The
length (duration in bytes) can be retrieved with a #GST_QUERY_DURATION or with a
#GST_QUERY_SEEKING.
Any @offset larger or equal than the length will make the function return
#GST_FLOW_EOS, which corresponds to EOS. In this case @buffer does not
contain a valid buffer.
The buffer size of @buffer will only be smaller than @length when @offset is
near the end of the stream. In all other cases, the size of @buffer must be
exactly the requested size.
It is allowed to call this function with a 0 @length and valid @offset, in
which case @buffer will contain a 0-sized buffer and the function returns
#GST_FLOW_OK.
When this function is called with a -1 @offset, the sequentially next buffer
of length @length in the stream is returned.
When this function is called with a -1 @length, a buffer with a default
optimal length is returned in @buffer. The length might depend on the value
of @offset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">#GST_FLOW_OK for success and a valid buffer in @buffer. Any other
return value leaves @buffer undefined.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the src #GstPad to perform the getrange on.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset of the range</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="length" transfer-ownership="none">
<doc xml:space="preserve">the length of the range</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">a memory location to hold the result buffer, cannot be %NULL.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
</parameters>
</callback>
<callback name="PadIterIntLinkFunction" c:type="GstPadIterIntLinkFunction">
<doc xml:space="preserve">The signature of the internal pad link iterator function.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstIterator that will iterate over all pads that are
linked to the given pad on the inside of the parent element.
the caller must call gst_iterator_free() after usage.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">The #GstPad to query.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</callback>
<bitfield name="PadLinkCheck" glib:type-name="GstPadLinkCheck" glib:get-type="gst_pad_link_check_get_type" c:type="GstPadLinkCheck">
<doc xml:space="preserve">The amount of checking to be done when linking pads. @GST_PAD_LINK_CHECK_CAPS
and @GST_PAD_LINK_CHECK_TEMPLATE_CAPS are mutually exclusive. If both are
specified, expensive but safe @GST_PAD_LINK_CHECK_CAPS are performed.
&gt; Only disable some of the checks if you are 100% certain you know the link
&gt; will not fail because of hierarchy/caps compatibility failures. If uncertain,
&gt; use the default checks (%GST_PAD_LINK_CHECK_DEFAULT) or the regular methods
&gt; for linking the pads.</doc>
<member name="nothing" value="0" c:identifier="GST_PAD_LINK_CHECK_NOTHING" glib:nick="nothing">
<doc xml:space="preserve">Don't check hierarchy or caps compatibility.</doc>
</member>
<member name="hierarchy" value="1" c:identifier="GST_PAD_LINK_CHECK_HIERARCHY" glib:nick="hierarchy">
<doc xml:space="preserve">Check the pads have same parents/grandparents.
Could be omitted if it is already known that the two elements that own the
pads are in the same bin.</doc>
</member>
<member name="template_caps" value="2" c:identifier="GST_PAD_LINK_CHECK_TEMPLATE_CAPS" glib:nick="template-caps">
<doc xml:space="preserve">Check if the pads are compatible by using
their template caps. This is much faster than @GST_PAD_LINK_CHECK_CAPS, but
would be unsafe e.g. if one pad has %GST_CAPS_ANY.</doc>
</member>
<member name="caps" value="4" c:identifier="GST_PAD_LINK_CHECK_CAPS" glib:nick="caps">
<doc xml:space="preserve">Check if the pads are compatible by comparing the
caps returned by gst_pad_query_caps().</doc>
</member>
<member name="no_reconfigure" value="8" c:identifier="GST_PAD_LINK_CHECK_NO_RECONFIGURE" glib:nick="no-reconfigure">
<doc xml:space="preserve">Disables pushing a reconfigure event when pads are
linked.</doc>
</member>
<member name="default" value="5" c:identifier="GST_PAD_LINK_CHECK_DEFAULT" glib:nick="default">
<doc xml:space="preserve">The default checks done when linking
pads (i.e. the ones used by gst_pad_link()).</doc>
</member>
</bitfield>
<callback name="PadLinkFunction" c:type="GstPadLinkFunction">
<doc xml:space="preserve">Function signature to handle a new link on the pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the link with the specified peer.</doc>
<type name="PadLinkReturn" c:type="GstPadLinkReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that is linked.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="peer" transfer-ownership="none">
<doc xml:space="preserve">the peer #GstPad of the link</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
<enumeration name="PadLinkReturn" glib:type-name="GstPadLinkReturn" glib:get-type="gst_pad_link_return_get_type" c:type="GstPadLinkReturn">
<doc xml:space="preserve">Result values from gst_pad_link and friends.</doc>
<member name="ok" value="0" c:identifier="GST_PAD_LINK_OK" glib:nick="ok">
<doc xml:space="preserve">link succeeded</doc>
</member>
<member name="wrong_hierarchy" value="-1" c:identifier="GST_PAD_LINK_WRONG_HIERARCHY" glib:nick="wrong-hierarchy">
<doc xml:space="preserve">pads have no common grandparent</doc>
</member>
<member name="was_linked" value="-2" c:identifier="GST_PAD_LINK_WAS_LINKED" glib:nick="was-linked">
<doc xml:space="preserve">pad was already linked</doc>
</member>
<member name="wrong_direction" value="-3" c:identifier="GST_PAD_LINK_WRONG_DIRECTION" glib:nick="wrong-direction">
<doc xml:space="preserve">pads have wrong direction</doc>
</member>
<member name="noformat" value="-4" c:identifier="GST_PAD_LINK_NOFORMAT" glib:nick="noformat">
<doc xml:space="preserve">pads do not have common format</doc>
</member>
<member name="nosched" value="-5" c:identifier="GST_PAD_LINK_NOSCHED" glib:nick="nosched">
<doc xml:space="preserve">pads cannot cooperate in scheduling</doc>
</member>
<member name="refused" value="-6" c:identifier="GST_PAD_LINK_REFUSED" glib:nick="refused">
<doc xml:space="preserve">refused for some reason</doc>
</member>
</enumeration>
<enumeration name="PadMode" glib:type-name="GstPadMode" glib:get-type="gst_pad_mode_get_type" c:type="GstPadMode">
<doc xml:space="preserve">The status of a GstPad. After activating a pad, which usually happens when the
parent element goes from READY to PAUSED, the GstPadMode defines if the
pad operates in push or pull mode.</doc>
<member name="none" value="0" c:identifier="GST_PAD_MODE_NONE" glib:nick="none">
<doc xml:space="preserve">Pad will not handle dataflow</doc>
</member>
<member name="push" value="1" c:identifier="GST_PAD_MODE_PUSH" glib:nick="push">
<doc xml:space="preserve">Pad handles dataflow in downstream push mode</doc>
</member>
<member name="pull" value="2" c:identifier="GST_PAD_MODE_PULL" glib:nick="pull">
<doc xml:space="preserve">Pad handles dataflow in upstream pull mode</doc>
</member>
<function name="get_name" c:identifier="gst_pad_mode_get_name">
<doc xml:space="preserve">Return the name of a pad mode, for use in debug messages mostly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">short mnemonic for pad mode @mode</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the pad mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
</parameters>
</function>
</enumeration>
<enumeration name="PadPresence" glib:type-name="GstPadPresence" glib:get-type="gst_pad_presence_get_type" c:type="GstPadPresence">
<doc xml:space="preserve">Indicates when this pad will become available.</doc>
<member name="always" value="0" c:identifier="GST_PAD_ALWAYS" glib:nick="always">
<doc xml:space="preserve">the pad is always available</doc>
</member>
<member name="sometimes" value="1" c:identifier="GST_PAD_SOMETIMES" glib:nick="sometimes">
<doc xml:space="preserve">the pad will become available depending on the media stream</doc>
</member>
<member name="request" value="2" c:identifier="GST_PAD_REQUEST" glib:nick="request">
<doc xml:space="preserve">the pad is only available on request with
gst_element_request_pad().</doc>
</member>
</enumeration>
<record name="PadPrivate" c:type="GstPadPrivate" disguised="1"/>
<callback name="PadProbeCallback" c:type="GstPadProbeCallback">
<doc xml:space="preserve">Callback used by gst_pad_add_probe(). Gets called to notify about the current
blocking type.
The callback is allowed to modify the data pointer in @info.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstPadProbeReturn</doc>
<type name="PadProbeReturn" c:type="GstPadProbeReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that is blocked</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">#GstPadProbeInfo</doc>
<type name="PadProbeInfo" c:type="GstPadProbeInfo*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">the gpointer to optional user data.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="PadProbeInfo" c:type="GstPadProbeInfo">
<doc xml:space="preserve">Info passed in the #GstPadProbeCallback.</doc>
<field name="type" writable="1">
<doc xml:space="preserve">the current probe type</doc>
<type name="PadProbeType" c:type="GstPadProbeType"/>
</field>
<field name="id" writable="1">
<doc xml:space="preserve">the id of the probe</doc>
<type name="gulong" c:type="gulong"/>
</field>
<field name="data" writable="1">
<doc xml:space="preserve">type specific data, check the @type field to know the
datatype. This field can be %NULL.</doc>
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="offset" writable="1">
<doc xml:space="preserve">offset of pull probe, this field is valid when @type contains
#GST_PAD_PROBE_TYPE_PULL</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="size" writable="1">
<doc xml:space="preserve">size of pull probe, this field is valid when @type contains
#GST_PAD_PROBE_TYPE_PULL</doc>
<type name="guint" c:type="guint"/>
</field>
<union name="ABI" c:type="ABI">
<field name="_gst_reserved" writable="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<record name="abi" c:type="abi">
<field name="flow_ret" writable="1">
<type name="FlowReturn" c:type="GstFlowReturn"/>
</field>
</record>
</union>
<method name="get_buffer" c:identifier="gst_pad_probe_info_get_buffer">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstBuffer from the probe</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadProbeInfo</doc>
<type name="PadProbeInfo" c:type="GstPadProbeInfo*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_buffer_list" c:identifier="gst_pad_probe_info_get_buffer_list">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstBufferList from the probe</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<instance-parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadProbeInfo</doc>
<type name="PadProbeInfo" c:type="GstPadProbeInfo*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_event" c:identifier="gst_pad_probe_info_get_event">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstEvent from the probe</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<instance-parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadProbeInfo</doc>
<type name="PadProbeInfo" c:type="GstPadProbeInfo*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_query" c:identifier="gst_pad_probe_info_get_query">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstQuery from the probe</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<instance-parameter name="info" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadProbeInfo</doc>
<type name="PadProbeInfo" c:type="GstPadProbeInfo*"/>
</instance-parameter>
</parameters>
</method>
</record>
<enumeration name="PadProbeReturn" glib:type-name="GstPadProbeReturn" glib:get-type="gst_pad_probe_return_get_type" c:type="GstPadProbeReturn">
<doc xml:space="preserve">Different return values for the #GstPadProbeCallback.</doc>
<member name="drop" value="0" c:identifier="GST_PAD_PROBE_DROP" glib:nick="drop">
<doc xml:space="preserve">drop data in data probes. For push mode this means that
the data item is not sent downstream. For pull mode, it means that
the data item is not passed upstream. In both cases, no other probes
are called for this item and %GST_FLOW_OK or %TRUE is returned to the
caller.</doc>
</member>
<member name="ok" value="1" c:identifier="GST_PAD_PROBE_OK" glib:nick="ok">
<doc xml:space="preserve">normal probe return value. This leaves the probe in
place, and defers decisions about dropping or passing data to other
probes, if any. If there are no other probes, the default behaviour
for the probe type applies ('block' for blocking probes,
and 'pass' for non-blocking probes).</doc>
</member>
<member name="remove" value="2" c:identifier="GST_PAD_PROBE_REMOVE" glib:nick="remove">
<doc xml:space="preserve">remove this probe.</doc>
</member>
<member name="pass" value="3" c:identifier="GST_PAD_PROBE_PASS" glib:nick="pass">
<doc xml:space="preserve">pass the data item in the block probe and block on the
next item.</doc>
</member>
<member name="handled" value="4" c:identifier="GST_PAD_PROBE_HANDLED" glib:nick="handled">
<doc xml:space="preserve">Data has been handled in the probe and will not be
forwarded further. For events and buffers this is the same behaviour as
%GST_PAD_PROBE_DROP (except that in this case you need to unref the buffer
or event yourself). For queries it will also return %TRUE to the caller.
The probe can also modify the #GstFlowReturn value by using the
#GST_PAD_PROBE_INFO_FLOW_RETURN() accessor.
Note that the resulting query must contain valid entries.
Since: 1.6</doc>
</member>
</enumeration>
<bitfield name="PadProbeType" glib:type-name="GstPadProbeType" glib:get-type="gst_pad_probe_type_get_type" c:type="GstPadProbeType">
<doc xml:space="preserve">The different probing types that can occur. When either one of
@GST_PAD_PROBE_TYPE_IDLE or @GST_PAD_PROBE_TYPE_BLOCK is used, the probe will be a
blocking probe.</doc>
<member name="invalid" value="0" c:identifier="GST_PAD_PROBE_TYPE_INVALID" glib:nick="invalid">
<doc xml:space="preserve">invalid probe type</doc>
</member>
<member name="idle" value="1" c:identifier="GST_PAD_PROBE_TYPE_IDLE" glib:nick="idle">
<doc xml:space="preserve">probe idle pads and block while the callback is called</doc>
</member>
<member name="block" value="2" c:identifier="GST_PAD_PROBE_TYPE_BLOCK" glib:nick="block">
<doc xml:space="preserve">probe and block pads</doc>
</member>
<member name="buffer" value="16" c:identifier="GST_PAD_PROBE_TYPE_BUFFER" glib:nick="buffer">
<doc xml:space="preserve">probe buffers</doc>
</member>
<member name="buffer_list" value="32" c:identifier="GST_PAD_PROBE_TYPE_BUFFER_LIST" glib:nick="buffer-list">
<doc xml:space="preserve">probe buffer lists</doc>
</member>
<member name="event_downstream" value="64" c:identifier="GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM" glib:nick="event-downstream">
<doc xml:space="preserve">probe downstream events</doc>
</member>
<member name="event_upstream" value="128" c:identifier="GST_PAD_PROBE_TYPE_EVENT_UPSTREAM" glib:nick="event-upstream">
<doc xml:space="preserve">probe upstream events</doc>
</member>
<member name="event_flush" value="256" c:identifier="GST_PAD_PROBE_TYPE_EVENT_FLUSH" glib:nick="event-flush">
<doc xml:space="preserve">probe flush events. This probe has to be
explicitly enabled and is not included in the
@@GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM or
@@GST_PAD_PROBE_TYPE_EVENT_UPSTREAM probe types.</doc>
</member>
<member name="query_downstream" value="512" c:identifier="GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM" glib:nick="query-downstream">
<doc xml:space="preserve">probe downstream queries</doc>
</member>
<member name="query_upstream" value="1024" c:identifier="GST_PAD_PROBE_TYPE_QUERY_UPSTREAM" glib:nick="query-upstream">
<doc xml:space="preserve">probe upstream queries</doc>
</member>
<member name="push" value="4096" c:identifier="GST_PAD_PROBE_TYPE_PUSH" glib:nick="push">
<doc xml:space="preserve">probe push</doc>
</member>
<member name="pull" value="8192" c:identifier="GST_PAD_PROBE_TYPE_PULL" glib:nick="pull">
<doc xml:space="preserve">probe pull</doc>
</member>
<member name="blocking" value="3" c:identifier="GST_PAD_PROBE_TYPE_BLOCKING" glib:nick="blocking">
<doc xml:space="preserve">probe and block at the next opportunity, at data flow or when idle</doc>
</member>
<member name="data_downstream" value="112" c:identifier="GST_PAD_PROBE_TYPE_DATA_DOWNSTREAM" glib:nick="data-downstream">
<doc xml:space="preserve">probe downstream data (buffers, buffer lists, and events)</doc>
</member>
<member name="data_upstream" value="128" c:identifier="GST_PAD_PROBE_TYPE_DATA_UPSTREAM" glib:nick="data-upstream">
<doc xml:space="preserve">probe upstream data (events)</doc>
</member>
<member name="data_both" value="240" c:identifier="GST_PAD_PROBE_TYPE_DATA_BOTH" glib:nick="data-both">
<doc xml:space="preserve">probe upstream and downstream data (buffers, buffer lists, and events)</doc>
</member>
<member name="block_downstream" value="114" c:identifier="GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM" glib:nick="block-downstream">
<doc xml:space="preserve">probe and block downstream data (buffers, buffer lists, and events)</doc>
</member>
<member name="block_upstream" value="130" c:identifier="GST_PAD_PROBE_TYPE_BLOCK_UPSTREAM" glib:nick="block-upstream">
<doc xml:space="preserve">probe and block upstream data (events)</doc>
</member>
<member name="event_both" value="192" c:identifier="GST_PAD_PROBE_TYPE_EVENT_BOTH" glib:nick="event-both">
<doc xml:space="preserve">probe upstream and downstream events</doc>
</member>
<member name="query_both" value="1536" c:identifier="GST_PAD_PROBE_TYPE_QUERY_BOTH" glib:nick="query-both">
<doc xml:space="preserve">probe upstream and downstream queries</doc>
</member>
<member name="all_both" value="1776" c:identifier="GST_PAD_PROBE_TYPE_ALL_BOTH" glib:nick="all-both">
<doc xml:space="preserve">probe upstream events and queries and downstream buffers, buffer lists, events and queries</doc>
</member>
<member name="scheduling" value="12288" c:identifier="GST_PAD_PROBE_TYPE_SCHEDULING" glib:nick="scheduling">
<doc xml:space="preserve">probe push and pull</doc>
</member>
</bitfield>
<callback name="PadQueryFunction" c:type="GstPadQueryFunction">
<doc xml:space="preserve">The signature of the query function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to query.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">the #GstQuery object to execute</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</callback>
<callback name="PadStickyEventsForeachFunction" c:type="GstPadStickyEventsForeachFunction">
<doc xml:space="preserve">Callback used by gst_pad_sticky_events_foreach().
When this function returns %TRUE, the next event will be
returned. When %FALSE is returned, gst_pad_sticky_events_foreach() will return.
When @event is set to %NULL, the item will be removed from the list of sticky events.
@event can be replaced by assigning a new reference to it.
This function is responsible for unreffing the old event when
removing or modifying.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the iteration should continue</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="event" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a sticky #GstEvent.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">the #gpointer to optional user data.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<class name="PadTemplate" c:symbol-prefix="pad_template" c:type="GstPadTemplate" parent="Object" glib:type-name="GstPadTemplate" glib:get-type="gst_pad_template_get_type" glib:type-struct="PadTemplateClass">
<doc xml:space="preserve">Padtemplates describe the possible media types a pad or an elementfactory can
handle. This allows for both inspection of handled types before loading the
element plugin as well as identifying pads on elements that are not yet
created (request or sometimes pads).
Pad and PadTemplates have #GstCaps attached to it to describe the media type
they are capable of dealing with. gst_pad_template_get_caps() or
GST_PAD_TEMPLATE_CAPS() are used to get the caps of a padtemplate. It's not
possible to modify the caps of a padtemplate after creation.
PadTemplates have a #GstPadPresence property which identifies the lifetime
of the pad and that can be retrieved with GST_PAD_TEMPLATE_PRESENCE(). Also
the direction of the pad can be retrieved from the #GstPadTemplate with
GST_PAD_TEMPLATE_DIRECTION().
The GST_PAD_TEMPLATE_NAME_TEMPLATE () is important for GST_PAD_REQUEST pads
because it has to be used as the name in the gst_element_get_request_pad()
call to instantiate a pad from this template.
Padtemplates can be created with gst_pad_template_new() or with
gst_static_pad_template_get (), which creates a #GstPadTemplate from a
#GstStaticPadTemplate that can be filled with the
convenient GST_STATIC_PAD_TEMPLATE() macro.
A padtemplate can be used to create a pad (see gst_pad_new_from_template()
or gst_pad_new_from_static_template ()) or to add to an element class
(see gst_element_class_add_static_pad_template ()).
The following code example shows the code to create a pad from a padtemplate.
|[&lt;!-- language="C" --&gt;
GstStaticPadTemplate my_template =
GST_STATIC_PAD_TEMPLATE (
"sink", // the name of the pad
GST_PAD_SINK, // the direction of the pad
GST_PAD_ALWAYS, // when this pad will be present
GST_STATIC_CAPS ( // the capabilities of the padtemplate
"audio/x-raw, "
"channels = (int) [ 1, 6 ]"
)
);
void
my_method (void)
{
GstPad *pad;
pad = gst_pad_new_from_static_template (&amp;amp;my_template, "sink");
...
}
]|
The following example shows you how to add the padtemplate to an
element class, this is usually done in the class_init of the class:
|[&lt;!-- language="C" --&gt;
static void
my_element_class_init (GstMyElementClass *klass)
{
GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_static_pad_template (gstelement_class, &amp;amp;my_template);
}
]|</doc>
<constructor name="new" c:identifier="gst_pad_template_new">
<doc xml:space="preserve">Creates a new pad template with a name according to the given template
and with the given arguments.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPadTemplate.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<parameter name="name_template" transfer-ownership="none">
<doc xml:space="preserve">the name template.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="direction" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadDirection of the template.</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
<parameter name="presence" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadPresence of the pad.</doc>
<type name="PadPresence" c:type="GstPadPresence"/>
</parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps set for the template.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_static_pad_template_with_gtype" c:identifier="gst_pad_template_new_from_static_pad_template_with_gtype" version="1.14">
<doc xml:space="preserve">Converts a #GstStaticPadTemplate into a #GstPadTemplate with a type.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPadTemplate.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<parameter name="pad_template" transfer-ownership="none">
<doc xml:space="preserve">the static pad template</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</parameter>
<parameter name="pad_type" transfer-ownership="none">
<doc xml:space="preserve">The #GType of the pad to create</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_with_gtype" c:identifier="gst_pad_template_new_with_gtype" version="1.14">
<doc xml:space="preserve">Creates a new pad template with a name according to the given template
and with the given arguments.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPadTemplate.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<parameter name="name_template" transfer-ownership="none">
<doc xml:space="preserve">the name template.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="direction" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadDirection of the template.</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</parameter>
<parameter name="presence" transfer-ownership="none">
<doc xml:space="preserve">the #GstPadPresence of the pad.</doc>
<type name="PadPresence" c:type="GstPadPresence"/>
</parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a #GstCaps set for the template.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="pad_type" transfer-ownership="none">
<doc xml:space="preserve">The #GType of the pad to create</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</constructor>
<virtual-method name="pad_created" invoker="pad_created">
<doc xml:space="preserve">Emit the pad-created signal for this template when created by this pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate that has been created</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that created it</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</virtual-method>
<method name="get_caps" c:identifier="gst_pad_template_get_caps">
<doc xml:space="preserve">Gets the capabilities of the pad template.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps of the pad template.
Unref after usage.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate to get capabilities of.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_documentation_caps" c:identifier="gst_pad_template_get_documentation_caps" version="1.18">
<doc xml:space="preserve">See gst_pad_template_set_documentation_caps().</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The caps to document. For convenience, this will return
gst_pad_template_get_caps() when no documentation caps were set.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the pad template to get documented capabilities on</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</instance-parameter>
</parameters>
</method>
<method name="pad_created" c:identifier="gst_pad_template_pad_created">
<doc xml:space="preserve">Emit the pad-created signal for this template when created by this pad.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate that has been created</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</instance-parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that created it</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</method>
<method name="set_documentation_caps" c:identifier="gst_pad_template_set_documentation_caps" version="1.18">
<doc xml:space="preserve">Certain elements will dynamically construct the caps of their
pad templates. In order not to let environment-specific information
into the documentation, element authors should use this method to
expose "stable" caps to the reader.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">the pad template to set documented capabilities on</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="full">
<doc xml:space="preserve">the documented capabilities</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<property name="caps" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">The capabilities of the pad described by the pad template.</doc>
<type name="Caps"/>
</property>
<property name="direction" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">The direction of the pad described by the pad template.</doc>
<type name="PadDirection"/>
</property>
<property name="gtype" version="1.14" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">The type of the pad described by the pad template.</doc>
<type name="GType" c:type="GType"/>
</property>
<property name="name-template" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">The name template of the pad template.</doc>
<type name="utf8" c:type="gchar*"/>
</property>
<property name="presence" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">When the pad described by the pad template will become available.</doc>
<type name="PadPresence"/>
</property>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="name_template">
<type name="utf8" c:type="gchar*"/>
</field>
<field name="direction">
<type name="PadDirection" c:type="GstPadDirection"/>
</field>
<field name="presence">
<type name="PadPresence" c:type="GstPadPresence"/>
</field>
<field name="caps">
<type name="Caps" c:type="GstCaps*"/>
</field>
<union name="ABI" c:type="ABI">
<field name="_gst_reserved" writable="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<record name="abi" c:type="abi">
<field name="gtype" writable="1">
<type name="GType" c:type="GType"/>
</field>
<field name="documentation_caps" writable="1">
<type name="Caps" c:type="GstCaps*"/>
</field>
</record>
</union>
<glib:signal name="pad-created" when="last">
<doc xml:space="preserve">This signal is fired when an element creates a pad from this template.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the pad that was created.</doc>
<type name="Pad"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="PadTemplateClass" c:type="GstPadTemplateClass" glib:is-gtype-struct-for="PadTemplate">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="pad_created">
<callback name="pad_created">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadTemplate that has been created</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</parameter>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that created it</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="PadTemplateFlags" glib:type-name="GstPadTemplateFlags" glib:get-type="gst_pad_template_flags_get_type" c:type="GstPadTemplateFlags">
<doc xml:space="preserve">Flags for the padtemplate</doc>
<member name="last" value="256" c:identifier="GST_PAD_TEMPLATE_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">first flag that can be used by subclasses.</doc>
</member>
</bitfield>
<callback name="PadUnlinkFunction" c:type="GstPadUnlinkFunction">
<doc xml:space="preserve">Function signature to handle a unlinking the pad prom its peer.
The pad's lock is already held when the unlink function is called, so most
pad functions cannot be called from within the callback.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad that is linked.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad. If the #GST_PAD_FLAG_NEED_PARENT
flag is set, @parent is guaranteed to be not-%NULL and remain valid
during the execution of this function.</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</callback>
<class name="ParamArray" c:symbol-prefix="param_spec_array" version="1.12" parent="GObject.ParamSpec" glib:type-name="GstParamArray" glib:get-type="gst_param_spec_array_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #GParamSpec for arrays of
values</doc>
</class>
<class name="ParamFraction" c:symbol-prefix="param_spec_fraction" parent="GObject.ParamSpec" glib:type-name="GstParamFraction" glib:get-type="gst_param_spec_fraction_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes a #GParamSpec for fractional
properties</doc>
</class>
<record name="ParamSpecArray" c:type="GstParamSpecArray">
<doc xml:space="preserve">A GParamSpec derived structure for arrays of values.</doc>
<field name="parent_instance" writable="1">
<doc xml:space="preserve">super class</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec"/>
</field>
<field name="element_spec" writable="1">
<doc xml:space="preserve">the #GParamSpec of the type of values in the array</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</field>
</record>
<record name="ParamSpecFraction" c:type="GstParamSpecFraction">
<doc xml:space="preserve">A GParamSpec derived structure that contains the meta data for fractional
properties.</doc>
<field name="parent_instance" writable="1">
<doc xml:space="preserve">super class</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec"/>
</field>
<field name="min_num" writable="1">
<doc xml:space="preserve">minimal numerator</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="min_den" writable="1">
<doc xml:space="preserve">minimal denominator</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="max_num" writable="1">
<doc xml:space="preserve">maximal numerator</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="max_den" writable="1">
<doc xml:space="preserve">maximal denominator</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="def_num" writable="1">
<doc xml:space="preserve">default numerator</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="def_den" writable="1">
<doc xml:space="preserve">default denominator</doc>
<type name="gint" c:type="gint"/>
</field>
</record>
<record name="ParentBufferMeta" c:type="GstParentBufferMeta" version="1.6">
<doc xml:space="preserve">The #GstParentBufferMeta is a #GstMeta which can be attached to a #GstBuffer
to hold a reference to another buffer that is only released when the child
#GstBuffer is released.
Typically, #GstParentBufferMeta is used when the child buffer is directly
using the #GstMemory of the parent buffer, and wants to prevent the parent
buffer from being returned to a buffer pool until the #GstMemory is available
for re-use.</doc>
<field name="parent" writable="1">
<doc xml:space="preserve">the parent #GstMeta structure</doc>
<type name="Meta" c:type="GstMeta"/>
</field>
<field name="buffer" writable="1">
<doc xml:space="preserve">the #GstBuffer on which a reference is being held.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</field>
<function name="get_info" c:identifier="gst_parent_buffer_meta_get_info" version="1.6">
<doc xml:space="preserve">Get the global #GstMetaInfo describing the #GstParentBufferMeta meta.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
</record>
<record name="ParseContext" c:type="GstParseContext" glib:type-name="GstParseContext" glib:get-type="gst_parse_context_get_type" c:symbol-prefix="parse_context">
<doc xml:space="preserve">Opaque structure.</doc>
<constructor name="new" c:identifier="gst_parse_context_new">
<doc xml:space="preserve">Allocates a parse context for use with gst_parse_launch_full() or
gst_parse_launchv_full().
Free-function: gst_parse_context_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly-allocated parse context. Free
with gst_parse_context_free() when no longer needed.</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</return-value>
</constructor>
<method name="copy" c:identifier="gst_parse_context_copy" version="1.12.1">
<doc xml:space="preserve">Copies the @context.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A copied #GstParseContext</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">a #GstParseContext</doc>
<type name="ParseContext" c:type="const GstParseContext*"/>
</instance-parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_parse_context_free">
<doc xml:space="preserve">Frees a parse context previously allocated with gst_parse_context_new().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="full">
<doc xml:space="preserve">a #GstParseContext</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_missing_elements" c:identifier="gst_parse_context_get_missing_elements">
<doc xml:space="preserve">Retrieve missing elements from a previous run of gst_parse_launch_full()
or gst_parse_launchv_full(). Will only return results if an error code
of %GST_PARSE_ERROR_NO_SUCH_ELEMENT was returned.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a
%NULL-terminated array of element factory name strings of missing
elements. Free with g_strfreev() when no longer needed.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">a #GstParseContext</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</instance-parameter>
</parameters>
</method>
</record>
<enumeration name="ParseError" glib:type-name="GstParseError" glib:get-type="gst_parse_error_get_type" c:type="GstParseError" glib:error-domain="gst_parse_error">
<doc xml:space="preserve">The different parsing errors that can occur.</doc>
<member name="syntax" value="0" c:identifier="GST_PARSE_ERROR_SYNTAX" glib:nick="syntax">
<doc xml:space="preserve">A syntax error occurred.</doc>
</member>
<member name="no_such_element" value="1" c:identifier="GST_PARSE_ERROR_NO_SUCH_ELEMENT" glib:nick="no-such-element">
<doc xml:space="preserve">The description contained an unknown element</doc>
</member>
<member name="no_such_property" value="2" c:identifier="GST_PARSE_ERROR_NO_SUCH_PROPERTY" glib:nick="no-such-property">
<doc xml:space="preserve">An element did not have a specified property</doc>
</member>
<member name="link" value="3" c:identifier="GST_PARSE_ERROR_LINK" glib:nick="link">
<doc xml:space="preserve">There was an error linking two pads.</doc>
</member>
<member name="could_not_set_property" value="4" c:identifier="GST_PARSE_ERROR_COULD_NOT_SET_PROPERTY" glib:nick="could-not-set-property">
<doc xml:space="preserve">There was an error setting a property</doc>
</member>
<member name="empty_bin" value="5" c:identifier="GST_PARSE_ERROR_EMPTY_BIN" glib:nick="empty-bin">
<doc xml:space="preserve">An empty bin was specified.</doc>
</member>
<member name="empty" value="6" c:identifier="GST_PARSE_ERROR_EMPTY" glib:nick="empty">
<doc xml:space="preserve">An empty description was specified</doc>
</member>
<member name="delayed_link" value="7" c:identifier="GST_PARSE_ERROR_DELAYED_LINK" glib:nick="delayed-link">
<doc xml:space="preserve">A delayed link did not get resolved.</doc>
</member>
<function name="quark" c:identifier="gst_parse_error_quark">
<doc xml:space="preserve">Get the error quark used by the parsing subsystem.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark of the parse errors.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<bitfield name="ParseFlags" glib:type-name="GstParseFlags" glib:get-type="gst_parse_flags_get_type" c:type="GstParseFlags">
<doc xml:space="preserve">Parsing options.</doc>
<member name="none" value="0" c:identifier="GST_PARSE_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">Do not use any special parsing options.</doc>
</member>
<member name="fatal_errors" value="1" c:identifier="GST_PARSE_FLAG_FATAL_ERRORS" glib:nick="fatal-errors">
<doc xml:space="preserve">Always return %NULL when an error occurs
(default behaviour is to return partially constructed bins or elements
in some cases)</doc>
</member>
<member name="no_single_element_bins" value="2" c:identifier="GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS" glib:nick="no-single-element-bins">
<doc xml:space="preserve">If a bin only has a single element,
just return the element.</doc>
</member>
<member name="place_in_bin" value="4" c:identifier="GST_PARSE_FLAG_PLACE_IN_BIN" glib:nick="place-in-bin">
<doc xml:space="preserve">If more than one toplevel element is described
by the pipeline description string, put them in a #GstBin instead of a
#GstPipeline. (Since: 1.10)</doc>
</member>
</bitfield>
<class name="Pipeline" c:symbol-prefix="pipeline" c:type="GstPipeline" parent="Bin" glib:type-name="GstPipeline" glib:get-type="gst_pipeline_get_type" glib:type-struct="PipelineClass">
<doc xml:space="preserve">A #GstPipeline is a special #GstBin used as the toplevel container for
the filter graph. The #GstPipeline will manage the selection and
distribution of a global #GstClock as well as provide a #GstBus to the
application.
gst_pipeline_new() is used to create a pipeline. when you are done with
the pipeline, use gst_object_unref() to free its resources including all
added #GstElement objects (if not otherwise referenced).
Elements are added and removed from the pipeline using the #GstBin
methods like gst_bin_add() and gst_bin_remove() (see #GstBin).
Before changing the state of the #GstPipeline (see #GstElement) a #GstBus
can be retrieved with gst_pipeline_get_bus(). This bus can then be
used to receive #GstMessage from the elements in the pipeline.
By default, a #GstPipeline will automatically flush the pending #GstBus
messages when going to the NULL state to ensure that no circular
references exist when no messages are read from the #GstBus. This
behaviour can be changed with gst_pipeline_set_auto_flush_bus().
When the #GstPipeline performs the PAUSED to PLAYING state change it will
select a clock for the elements. The clock selection algorithm will by
default select a clock provided by an element that is most upstream
(closest to the source). For live pipelines (ones that return
#GST_STATE_CHANGE_NO_PREROLL from the gst_element_set_state() call) this
will select the clock provided by the live source. For normal pipelines
this will select a clock provided by the sinks (most likely the audio
sink). If no element provides a clock, a default #GstSystemClock is used.
The clock selection can be controlled with the gst_pipeline_use_clock()
method, which will enforce a given clock on the pipeline. With
gst_pipeline_auto_clock() the default clock selection algorithm can be
restored.
A #GstPipeline maintains a running time for the elements. The running
time is defined as the difference between the current clock time and
the base time. When the pipeline goes to READY or a flushing seek is
performed on it, the running time is reset to 0. When the pipeline is
set from PLAYING to PAUSED, the current clock time is sampled and used to
configure the base time for the elements when the pipeline is set
to PLAYING again. The effect is that the running time (as the difference
between the clock time and the base time) will count how much time was spent
in the PLAYING state. This default behaviour can be changed with the
gst_element_set_start_time() method.</doc>
<implements name="ChildProxy"/>
<constructor name="new" c:identifier="gst_pipeline_new">
<doc xml:space="preserve">Create a new pipeline with the given name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">newly created GstPipeline
MT safe.</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">name of new pipeline</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<method name="auto_clock" c:identifier="gst_pipeline_auto_clock">
<doc xml:space="preserve">Let @pipeline select a clock automatically. This is the default
behaviour.
Use this function if you previous forced a fixed clock with
gst_pipeline_use_clock() and want to restore the default
pipeline clock selection algorithm.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_auto_flush_bus" c:identifier="gst_pipeline_get_auto_flush_bus">
<doc xml:space="preserve">Check if @pipeline will automatically flush messages when going to
the NULL state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">whether the pipeline will automatically flush its bus when
going from READY to NULL state or not.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_bus" c:identifier="gst_pipeline_get_bus">
<doc xml:space="preserve">Gets the #GstBus of @pipeline. The bus allows applications to receive
#GstMessage packets.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstBus, unref after usage.
MT safe.</doc>
<type name="Bus" c:type="GstBus*"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_clock" c:identifier="gst_pipeline_get_clock" introspectable="0">
<doc xml:space="preserve">Gets the current clock used by @pipeline. Users of object
oriented languages should use gst_pipeline_get_pipeline_clock()
to avoid confusion with gst_element_get_clock() which has a different behavior.
Unlike gst_element_get_clock(), this function will always return a
clock, even if the pipeline is not in the PLAYING state.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstClock, unref after usage.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_delay" c:identifier="gst_pipeline_get_delay">
<doc xml:space="preserve">Get the configured delay (see gst_pipeline_set_delay()).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The configured delay.
MT safe.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_latency" c:identifier="gst_pipeline_get_latency" version="1.6">
<doc xml:space="preserve">Gets the latency that should be configured on the pipeline. See
gst_pipeline_set_latency().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Latency to configure on the pipeline or GST_CLOCK_TIME_NONE</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_pipeline_clock" c:identifier="gst_pipeline_get_pipeline_clock" version="1.6">
<doc xml:space="preserve">Gets the current clock used by @pipeline.
Unlike gst_element_get_clock(), this function will always return a
clock, even if the pipeline is not in the PLAYING state.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstClock, unref after usage.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_auto_flush_bus" c:identifier="gst_pipeline_set_auto_flush_bus">
<doc xml:space="preserve">Usually, when a pipeline goes from READY to NULL state, it automatically
flushes all pending messages on the bus, which is done for refcounting
purposes, to break circular references.
This means that applications that update state using (async) bus messages
(e.g. do certain things when a pipeline goes from PAUSED to READY) might
not get to see messages when the pipeline is shut down, because they might
be flushed before they can be dispatched in the main thread. This behaviour
can be disabled using this function.
It is important that all messages on the bus are handled when the
automatic flushing is disabled else memory leaks will be introduced.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
<parameter name="auto_flush" transfer-ownership="none">
<doc xml:space="preserve">whether or not to automatically flush the bus when
the pipeline goes from READY to NULL state</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_clock" c:identifier="gst_pipeline_set_clock" introspectable="0">
<doc xml:space="preserve">Set the clock for @pipeline. The clock will be distributed
to all the elements managed by the pipeline.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the clock could be set on the pipeline. %FALSE if
some element did not accept the clock.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
<parameter name="clock" transfer-ownership="none">
<doc xml:space="preserve">the clock to set</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</method>
<method name="set_delay" c:identifier="gst_pipeline_set_delay">
<doc xml:space="preserve">Set the expected delay needed for all elements to perform the
PAUSED to PLAYING state change. @delay will be added to the
base time of the elements so that they wait an additional @delay
amount of time before starting to process buffers and cannot be
#GST_CLOCK_TIME_NONE.
This option is used for tuning purposes and should normally not be
used.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
<parameter name="delay" transfer-ownership="none">
<doc xml:space="preserve">the delay</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_latency" c:identifier="gst_pipeline_set_latency" version="1.6">
<doc xml:space="preserve">Sets the latency that should be configured on the pipeline. Setting
GST_CLOCK_TIME_NONE will restore the default behaviour of using the minimum
latency from the LATENCY query. Setting this is usually not required and
the pipeline will figure out an appropriate latency automatically.
Setting a too low latency, especially lower than the minimum latency from
the LATENCY query, will most likely cause the pipeline to fail.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
<parameter name="latency" transfer-ownership="none">
<doc xml:space="preserve">latency to configure</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="use_clock" c:identifier="gst_pipeline_use_clock">
<doc xml:space="preserve">Force @pipeline to use the given @clock. The pipeline will
always use the given clock even if new clock providers are added
to this pipeline.
If @clock is %NULL all clocking will be disabled which will make
the pipeline run as fast as possible.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pipeline" transfer-ownership="none">
<doc xml:space="preserve">a #GstPipeline</doc>
<type name="Pipeline" c:type="GstPipeline*"/>
</instance-parameter>
<parameter name="clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the clock to use</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</method>
<property name="auto-flush-bus" writable="1" transfer-ownership="none">
<doc xml:space="preserve">Whether or not to automatically flush all messages on the
pipeline's bus when going from READY to NULL state. Please see
gst_pipeline_set_auto_flush_bus() for more information on this option.</doc>
<type name="gboolean" c:type="gboolean"/>
</property>
<property name="delay" writable="1" transfer-ownership="none">
<doc xml:space="preserve">The expected delay needed for elements to spin up to the
PLAYING state expressed in nanoseconds.
see gst_pipeline_set_delay() for more information on this option.</doc>
<type name="guint64" c:type="guint64"/>
</property>
<property name="latency" version="1.6" writable="1" transfer-ownership="none">
<doc xml:space="preserve">Latency to configure on the pipeline. See gst_pipeline_set_latency().</doc>
<type name="guint64" c:type="guint64"/>
</property>
<field name="bin">
<type name="Bin" c:type="GstBin"/>
</field>
<field name="fixed_clock">
<doc xml:space="preserve">The fixed clock of the pipeline, used when
GST_PIPELINE_FLAG_FIXED_CLOCK is set.</doc>
<type name="Clock" c:type="GstClock*"/>
</field>
<field name="stream_time">
<doc xml:space="preserve">The stream time of the pipeline. A better name for this
property would be the running_time, the total time spent in the
PLAYING state without being flushed. (deprecated, use the start_time
on GstElement).</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="delay">
<doc xml:space="preserve">Extra delay added to base_time to compensate for computing delays
when setting elements to PLAYING.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="priv" readable="0" private="1">
<type name="PipelinePrivate" c:type="GstPipelinePrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="PipelineClass" c:type="GstPipelineClass" glib:is-gtype-struct-for="Pipeline">
<field name="parent_class">
<type name="BinClass" c:type="GstBinClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<bitfield name="PipelineFlags" glib:type-name="GstPipelineFlags" glib:get-type="gst_pipeline_flags_get_type" c:type="GstPipelineFlags">
<doc xml:space="preserve">Pipeline flags</doc>
<member name="fixed_clock" value="524288" c:identifier="GST_PIPELINE_FLAG_FIXED_CLOCK" glib:nick="fixed-clock">
<doc xml:space="preserve">this pipeline works with a fixed clock</doc>
</member>
<member name="last" value="8388608" c:identifier="GST_PIPELINE_FLAG_LAST" glib:nick="last">
<doc xml:space="preserve">offset to define more flags</doc>
</member>
</bitfield>
<record name="PipelinePrivate" c:type="GstPipelinePrivate" disguised="1"/>
<class name="Plugin" c:symbol-prefix="plugin" c:type="GstPlugin" parent="Object" glib:type-name="GstPlugin" glib:get-type="gst_plugin_get_type" glib:type-struct="PluginClass">
<doc xml:space="preserve">GStreamer is extensible, so #GstElement instances can be loaded at runtime.
A plugin system can provide one or more of the basic GStreamer
#GstPluginFeature subclasses.
A plugin should export a symbol `gst_plugin_desc` that is a
struct of type #GstPluginDesc.
the plugin loader will check the version of the core library the plugin was
linked against and will create a new #GstPlugin. It will then call the
#GstPluginInitFunc function that was provided in the
`gst_plugin_desc`.
Once you have a handle to a #GstPlugin (e.g. from the #GstRegistry), you
can add any object that subclasses #GstPluginFeature.
Usually plugins are always automatically loaded so you don't need to call
gst_plugin_load() explicitly to bring it into memory. There are options to
statically link plugins to an app or even use GStreamer without a plugin
repository in which case gst_plugin_load() can be needed to bring the plugin
into memory.</doc>
<function name="list_free" c:identifier="gst_plugin_list_free">
<doc xml:space="preserve">Unrefs each member of @list, then frees the list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">list of #GstPlugin</doc>
<type name="GLib.List" c:type="GList*">
<type name="Plugin"/>
</type>
</parameter>
</parameters>
</function>
<function name="load_by_name" c:identifier="gst_plugin_load_by_name">
<doc xml:space="preserve">Load the named plugin. Refs the plugin.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a reference to a loaded plugin, or
%NULL on error.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of plugin to load</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="load_file" c:identifier="gst_plugin_load_file" throws="1">
<doc xml:space="preserve">Loads the given plugin and refs it. Caller needs to unref after use.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a reference to the existing loaded GstPlugin, a
reference to the newly-loaded GstPlugin, or %NULL if an error occurred.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<parameter name="filename" transfer-ownership="none">
<doc xml:space="preserve">the plugin filename to load</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="register_static" c:identifier="gst_plugin_register_static">
<doc xml:space="preserve">Registers a static plugin, ie. a plugin which is private to an application
or library and contained within the application or library (as opposed to
being shipped as a separate module file).
You must make sure that GStreamer has been initialised (with gst_init() or
via gst_init_get_option_group()) before calling this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the plugin was registered correctly, otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="major_version" transfer-ownership="none">
<doc xml:space="preserve">the major version number of the GStreamer core that the
plugin was compiled for, you can just use GST_VERSION_MAJOR here</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="minor_version" transfer-ownership="none">
<doc xml:space="preserve">the minor version number of the GStreamer core that the
plugin was compiled for, you can just use GST_VERSION_MINOR here</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a unique name of the plugin (ideally prefixed with an application- or
library-specific namespace prefix in order to avoid name conflicts in
case a similar plugin with the same name ever gets added to GStreamer)</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">description of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="init_func" transfer-ownership="none" scope="call">
<doc xml:space="preserve">pointer to the init function of this plugin.</doc>
<type name="PluginInitFunc" c:type="GstPluginInitFunc"/>
</parameter>
<parameter name="version" transfer-ownership="none">
<doc xml:space="preserve">version string of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="license" transfer-ownership="none">
<doc xml:space="preserve">effective license of plugin. Must be one of the approved licenses
(see #GstPluginDesc above) or the plugin will not be registered.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="source" transfer-ownership="none">
<doc xml:space="preserve">source module plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="package" transfer-ownership="none">
<doc xml:space="preserve">shipped package plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="origin" transfer-ownership="none">
<doc xml:space="preserve">URL to provider of plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="register_static_full" c:identifier="gst_plugin_register_static_full">
<doc xml:space="preserve">Registers a static plugin, ie. a plugin which is private to an application
or library and contained within the application or library (as opposed to
being shipped as a separate module file) with a #GstPluginInitFullFunc
which allows user data to be passed to the callback function (useful
for bindings).
You must make sure that GStreamer has been initialised (with gst_init() or
via gst_init_get_option_group()) before calling this function.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the plugin was registered correctly, otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="major_version" transfer-ownership="none">
<doc xml:space="preserve">the major version number of the GStreamer core that the
plugin was compiled for, you can just use GST_VERSION_MAJOR here</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="minor_version" transfer-ownership="none">
<doc xml:space="preserve">the minor version number of the GStreamer core that the
plugin was compiled for, you can just use GST_VERSION_MINOR here</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a unique name of the plugin (ideally prefixed with an application- or
library-specific namespace prefix in order to avoid name conflicts in
case a similar plugin with the same name ever gets added to GStreamer)</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">description of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="init_full_func" transfer-ownership="none" scope="call" closure="10">
<doc xml:space="preserve">pointer to the init function with user data
of this plugin.</doc>
<type name="PluginInitFullFunc" c:type="GstPluginInitFullFunc"/>
</parameter>
<parameter name="version" transfer-ownership="none">
<doc xml:space="preserve">version string of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="license" transfer-ownership="none">
<doc xml:space="preserve">effective license of plugin. Must be one of the approved licenses
(see #GstPluginDesc above) or the plugin will not be registered.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="source" transfer-ownership="none">
<doc xml:space="preserve">source module plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="package" transfer-ownership="none">
<doc xml:space="preserve">shipped package plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="origin" transfer-ownership="none">
<doc xml:space="preserve">URL to provider of plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">gpointer to user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</function>
<method name="add_dependency" c:identifier="gst_plugin_add_dependency">
<doc xml:space="preserve">Make GStreamer aware of external dependencies which affect the feature
set of this plugin (ie. the elements or typefinders associated with it).
GStreamer will re-inspect plugins with external dependencies whenever any
of the external dependencies change. This is useful for plugins which wrap
other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
library and makes visualisations available as GStreamer elements, or a
codec loader which exposes elements and/or caps dependent on what external
codec libraries are currently installed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">a #GstPlugin</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
<parameter name="env_vars" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">%NULL-terminated array of environment variables affecting the
feature set of the plugin (e.g. an environment variable containing
paths where to look for additional modules/plugins of a library),
or %NULL. Environment variable names may be followed by a path component
which will be added to the content of the environment variable, e.g.
"HOME/.mystuff/plugins".</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
<parameter name="paths" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">%NULL-terminated array of directories/paths where dependent files
may be, or %NULL.</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
<parameter name="names" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">%NULL-terminated array of file names (or file name suffixes,
depending on @flags) to be used in combination with the paths from
@paths and/or the paths extracted from the environment variables in
@env_vars, or %NULL.</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE</doc>
<type name="PluginDependencyFlags" c:type="GstPluginDependencyFlags"/>
</parameter>
</parameters>
</method>
<method name="add_dependency_simple" c:identifier="gst_plugin_add_dependency_simple">
<doc xml:space="preserve">Make GStreamer aware of external dependencies which affect the feature
set of this plugin (ie. the elements or typefinders associated with it).
GStreamer will re-inspect plugins with external dependencies whenever any
of the external dependencies change. This is useful for plugins which wrap
other plugin systems, e.g. a plugin which wraps a plugin-based visualisation
library and makes visualisations available as GStreamer elements, or a
codec loader which exposes elements and/or caps dependent on what external
codec libraries are currently installed.
Convenience wrapper function for gst_plugin_add_dependency() which
takes simple strings as arguments instead of string arrays, with multiple
arguments separated by predefined delimiters (see above).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">the #GstPlugin</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
<parameter name="env_vars" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">one or more environment variables (separated by ':', ';' or ','),
or %NULL. Environment variable names may be followed by a path component
which will be added to the content of the environment variable, e.g.
"HOME/.mystuff/plugins:MYSTUFF_PLUGINS_PATH"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="paths" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">one ore more directory paths (separated by ':' or ';' or ','),
or %NULL. Example: "/usr/lib/mystuff/plugins"</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="names" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">one or more file names or file name suffixes (separated by commas),
or %NULL</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">optional flags, or #GST_PLUGIN_DEPENDENCY_FLAG_NONE</doc>
<type name="PluginDependencyFlags" c:type="GstPluginDependencyFlags"/>
</parameter>
</parameters>
</method>
<method name="get_cache_data" c:identifier="gst_plugin_get_cache_data">
<doc xml:space="preserve">Gets the plugin specific data cache. If it is %NULL there is no cached data
stored. This is the case when the registry is getting rebuilt.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The cached data as a
#GstStructure or %NULL.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">a plugin</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_description" c:identifier="gst_plugin_get_description">
<doc xml:space="preserve">Get the long descriptive name of the plugin</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the long name of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get long name of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_filename" c:identifier="gst_plugin_get_filename">
<doc xml:space="preserve">get the filename of the plugin</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the filename of the plugin</doc>
<type name="filename" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the filename of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_license" c:identifier="gst_plugin_get_license">
<doc xml:space="preserve">get the license of the plugin</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the license of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the license of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_name" c:identifier="gst_plugin_get_name">
<doc xml:space="preserve">Get the short name of the plugin</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the name of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_origin" c:identifier="gst_plugin_get_origin">
<doc xml:space="preserve">get the URL where the plugin comes from</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the origin of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the origin of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_package" c:identifier="gst_plugin_get_package">
<doc xml:space="preserve">get the package the plugin belongs to.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the package of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the package of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_release_date_string" c:identifier="gst_plugin_get_release_date_string">
<doc xml:space="preserve">Get the release date (and possibly time) in form of a string, if available.
For normal GStreamer plugin releases this will usually just be a date in
the form of "YYYY-MM-DD", while pre-releases and builds from git may contain
a time component after the date as well, in which case the string will be
formatted like "YYYY-MM-DDTHH:MMZ" (e.g. "2012-04-30T09:30Z").
There may be plugins that do not have a valid release date set on them.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the date string of the plugin, or %NULL if not
available.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the release date of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_source" c:identifier="gst_plugin_get_source">
<doc xml:space="preserve">get the source module the plugin belongs to.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the source of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the source of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_version" c:identifier="gst_plugin_get_version">
<doc xml:space="preserve">get the version of the plugin</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the version of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to get the version of</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_loaded" c:identifier="gst_plugin_is_loaded">
<doc xml:space="preserve">queries if the plugin is loaded into memory</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE is loaded, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to query</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="load" c:identifier="gst_plugin_load">
<doc xml:space="preserve">Loads @plugin. Note that the *return value* is the loaded plugin; @plugin is
untouched. The normal use pattern of this function goes like this:
|[
GstPlugin *loaded_plugin;
loaded_plugin = gst_plugin_load (plugin);
// presumably, we're no longer interested in the potentially-unloaded plugin
gst_object_unref (plugin);
plugin = loaded_plugin;
]|</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a reference to a loaded plugin, or
%NULL on error.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">plugin to load</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_cache_data" c:identifier="gst_plugin_set_cache_data">
<doc xml:space="preserve">Adds plugin specific data to cache. Passes the ownership of the structure to
the @plugin.
The cache is flushed every time the registry is rebuilt.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">a plugin</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</instance-parameter>
<parameter name="cache_data" transfer-ownership="full">
<doc xml:space="preserve">a structure containing the data to cache</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
</class>
<bitfield name="PluginAPIFlags" version="1.18" glib:type-name="GstPluginAPIFlags" glib:get-type="gst_plugin_api_flags_get_type" c:type="GstPluginAPIFlags">
<member name="members" value="1" c:identifier="GST_PLUGIN_API_FLAG_IGNORE_ENUM_MEMBERS" glib:nick="members">
<doc xml:space="preserve">Ignore enum members when generating
the plugins cache. This is useful if the members of the enum are generated
dynamically, in order not to expose incorrect documentation to the end user.</doc>
</member>
</bitfield>
<record name="PluginClass" c:type="GstPluginClass" disguised="1" glib:is-gtype-struct-for="Plugin"/>
<bitfield name="PluginDependencyFlags" glib:type-name="GstPluginDependencyFlags" glib:get-type="gst_plugin_dependency_flags_get_type" c:type="GstPluginDependencyFlags">
<doc xml:space="preserve">Flags used in connection with gst_plugin_add_dependency().</doc>
<member name="none" value="0" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">no special flags</doc>
</member>
<member name="recurse" value="1" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_RECURSE" glib:nick="recurse">
<doc xml:space="preserve">recurse into subdirectories</doc>
</member>
<member name="paths_are_default_only" value="2" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_DEFAULT_ONLY" glib:nick="paths-are-default-only">
<doc xml:space="preserve">use paths
argument only if none of the environment variables is set</doc>
</member>
<member name="file_name_is_suffix" value="4" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_SUFFIX" glib:nick="file-name-is-suffix">
<doc xml:space="preserve">interpret
filename argument as filter suffix and check all matching files in
the directory</doc>
</member>
<member name="file_name_is_prefix" value="8" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_FILE_NAME_IS_PREFIX" glib:nick="file-name-is-prefix">
<doc xml:space="preserve">interpret
filename argument as filter prefix and check all matching files in
the directory. Since: 1.8.</doc>
</member>
<member name="paths_are_relative_to_exe" value="16" c:identifier="GST_PLUGIN_DEPENDENCY_FLAG_PATHS_ARE_RELATIVE_TO_EXE" glib:nick="paths-are-relative-to-exe">
<doc xml:space="preserve">interpret
non-absolute paths as relative to the main executable directory. Since
1.14.</doc>
</member>
</bitfield>
<record name="PluginDesc" c:type="GstPluginDesc">
<doc xml:space="preserve">A plugin should export a variable of this type called plugin_desc. The plugin
loader will use the data provided there to initialize the plugin.
The @licence parameter must be one of: LGPL, GPL, QPL, GPL/QPL, MPL,
BSD, MIT/X11, Proprietary, unknown.</doc>
<field name="major_version" writable="1">
<doc xml:space="preserve">the major version number of core that plugin was compiled for</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="minor_version" writable="1">
<doc xml:space="preserve">the minor version number of core that plugin was compiled for</doc>
<type name="gint" c:type="gint"/>
</field>
<field name="name" writable="1">
<doc xml:space="preserve">a unique name of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="description" writable="1">
<doc xml:space="preserve">description of plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="plugin_init" writable="1">
<doc xml:space="preserve">pointer to the init function of this plugin.</doc>
<type name="PluginInitFunc" c:type="GstPluginInitFunc"/>
</field>
<field name="version" writable="1">
<doc xml:space="preserve">version of the plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="license" writable="1">
<doc xml:space="preserve">effective license of plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="source" writable="1">
<doc xml:space="preserve">source module plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="package" writable="1">
<doc xml:space="preserve">shipped package plugin belongs to</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="origin" writable="1">
<doc xml:space="preserve">URL to provider of plugin</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="release_datetime" writable="1">
<doc xml:space="preserve">date time string in ISO 8601
format (or rather, a subset thereof), or %NULL. Allowed are the
following formats: "YYYY-MM-DD" and "YYY-MM-DDTHH:MMZ" (with
'T' a separator and 'Z' indicating UTC/Zulu time). This field
should be set via the GST_PACKAGE_RELEASE_DATETIME
preprocessor macro.</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<enumeration name="PluginError" glib:type-name="GstPluginError" glib:get-type="gst_plugin_error_get_type" c:type="GstPluginError" glib:error-domain="gst_plugin_error">
<doc xml:space="preserve">The plugin loading errors</doc>
<member name="module" value="0" c:identifier="GST_PLUGIN_ERROR_MODULE" glib:nick="module">
<doc xml:space="preserve">The plugin could not be loaded</doc>
</member>
<member name="dependencies" value="1" c:identifier="GST_PLUGIN_ERROR_DEPENDENCIES" glib:nick="dependencies">
<doc xml:space="preserve">The plugin has unresolved dependencies</doc>
</member>
<member name="name_mismatch" value="2" c:identifier="GST_PLUGIN_ERROR_NAME_MISMATCH" glib:nick="name-mismatch">
<doc xml:space="preserve">The plugin has already be loaded from a different file</doc>
</member>
<function name="quark" c:identifier="gst_plugin_error_quark">
<doc xml:space="preserve">Get the error quark.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The error quark used in GError messages</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<class name="PluginFeature" c:symbol-prefix="plugin_feature" c:type="GstPluginFeature" parent="Object" abstract="1" glib:type-name="GstPluginFeature" glib:get-type="gst_plugin_feature_get_type" glib:type-struct="PluginFeatureClass">
<doc xml:space="preserve">This is a base class for anything that can be added to a #GstPlugin.</doc>
<function name="list_copy" c:identifier="gst_plugin_feature_list_copy">
<doc xml:space="preserve">Copies the list of features. Caller should call @gst_plugin_feature_list_free
when done with the list.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a copy of @list,
with each feature's reference count incremented.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list
of #GstPluginFeature</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</parameter>
</parameters>
</function>
<function name="list_debug" c:identifier="gst_plugin_feature_list_debug">
<doc xml:space="preserve">Debug the plugin feature names in @list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GList of
plugin features</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</parameter>
</parameters>
</function>
<function name="list_free" c:identifier="gst_plugin_feature_list_free">
<doc xml:space="preserve">Unrefs each member of @list, then frees the list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">list
of #GstPluginFeature</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</parameter>
</parameters>
</function>
<function name="rank_compare_func" c:identifier="gst_plugin_feature_rank_compare_func">
<doc xml:space="preserve">Compares the two given #GstPluginFeature instances. This function can be
used as a #GCompareFunc when sorting by rank and then by name.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">negative value if the rank of p1 &gt; the rank of p2 or the ranks are
equal but the name of p1 comes before the name of p2; zero if the rank
and names are equal; positive value if the rank of p1 &lt; the rank of p2 or the
ranks are equal but the name of p2 comes before the name of p1</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="p1" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstPluginFeature</doc>
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
<parameter name="p2" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstPluginFeature</doc>
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
</parameters>
</function>
<method name="check_version" c:identifier="gst_plugin_feature_check_version">
<doc xml:space="preserve">Checks whether the given plugin feature is at least
the required version</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the plugin feature has at least
the required version, otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
<parameter name="min_major" transfer-ownership="none">
<doc xml:space="preserve">minimum required major version</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_minor" transfer-ownership="none">
<doc xml:space="preserve">minimum required minor version</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_micro" transfer-ownership="none">
<doc xml:space="preserve">minimum required micro version</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_plugin" c:identifier="gst_plugin_feature_get_plugin">
<doc xml:space="preserve">Get the plugin that provides this feature.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the plugin that provides this
feature, or %NULL. Unref with gst_object_unref() when no
longer needed.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_plugin_name" c:identifier="gst_plugin_feature_get_plugin_name" version="1.2">
<doc xml:space="preserve">Get the name of the plugin that provides this feature.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the name of the plugin that provides this
feature, or %NULL if the feature is not associated with a
plugin.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_rank" c:identifier="gst_plugin_feature_get_rank">
<doc xml:space="preserve">Gets the rank of a plugin feature.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The rank of the feature</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">a feature</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
</parameters>
</method>
<method name="load" c:identifier="gst_plugin_feature_load">
<doc xml:space="preserve">Loads the plugin containing @feature if it's not already loaded. @feature is
unaffected; use the return value instead.
Normally this function is used like this:
|[&lt;!-- language="C" --&gt;
GstPluginFeature *loaded_feature;
loaded_feature = gst_plugin_feature_load (feature);
// presumably, we're no longer interested in the potentially-unloaded feature
gst_object_unref (feature);
feature = loaded_feature;
]|</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a reference to the loaded
feature, or %NULL on error</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">the plugin feature to check</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_rank" c:identifier="gst_plugin_feature_set_rank">
<doc xml:space="preserve">Specifies a rank for a plugin feature, so that autoplugging uses
the most appropriate feature.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">feature to rank</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</instance-parameter>
<parameter name="rank" transfer-ownership="none">
<doc xml:space="preserve">rank value - higher number means more priority rank</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
</class>
<record name="PluginFeatureClass" c:type="GstPluginFeatureClass" disguised="1" glib:is-gtype-struct-for="PluginFeature"/>
<callback name="PluginFeatureFilter" c:type="GstPluginFeatureFilter">
<doc xml:space="preserve">A function that can be used with e.g. gst_registry_feature_filter()
to get a list of pluginfeature that match certain criteria.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for a positive match, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">the pluginfeature to check</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">the user_data that has been passed on e.g.
gst_registry_feature_filter()</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="PluginFilter" c:type="GstPluginFilter">
<doc xml:space="preserve">A function that can be used with e.g. gst_registry_plugin_filter()
to get a list of plugins that match certain criteria.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for a positive match, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">the plugin to check</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">the user_data that has been passed on e.g. gst_registry_plugin_filter()</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<bitfield name="PluginFlags" glib:type-name="GstPluginFlags" glib:get-type="gst_plugin_flags_get_type" c:type="GstPluginFlags">
<doc xml:space="preserve">The plugin loading state</doc>
<member name="cached" value="16" c:identifier="GST_PLUGIN_FLAG_CACHED" glib:nick="cached">
<doc xml:space="preserve">Temporarily loaded plugins</doc>
</member>
<member name="blacklisted" value="32" c:identifier="GST_PLUGIN_FLAG_BLACKLISTED" glib:nick="blacklisted">
<doc xml:space="preserve">The plugin won't be scanned (again)</doc>
</member>
</bitfield>
<callback name="PluginInitFullFunc" c:type="GstPluginInitFullFunc">
<doc xml:space="preserve">A plugin should provide a pointer to a function of either #GstPluginInitFunc
or this type in the plugin_desc struct.
The function will be called by the loader at startup. One would then
register each #GstPluginFeature. This version allows
user data to be passed to init function (useful for bindings).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if plugin initialised successfully</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">The plugin object</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">extra data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="PluginInitFunc" c:type="GstPluginInitFunc">
<doc xml:space="preserve">A plugin should provide a pointer to a function of this type in the
plugin_desc struct.
This function will be called by the loader at startup. One would then
register each #GstPluginFeature.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if plugin initialised successfully</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">The plugin object</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
</parameters>
</callback>
<record name="Poll" c:type="GstPoll" disguised="1">
<doc xml:space="preserve">A #GstPoll keeps track of file descriptors much like fd_set (used with
select ()) or a struct pollfd array (used with poll ()). Once created with
gst_poll_new(), the set can be used to wait for file descriptors to be
readable and/or writable. It is possible to make this wait be controlled
by specifying %TRUE for the @controllable flag when creating the set (or
later calling gst_poll_set_controllable()).
New file descriptors are added to the set using gst_poll_add_fd(), and
removed using gst_poll_remove_fd(). Controlling which file descriptors
should be waited for to become readable and/or writable are done using
gst_poll_fd_ctl_read(), gst_poll_fd_ctl_write() and gst_poll_fd_ctl_pri().
Use gst_poll_wait() to wait for the file descriptors to actually become
readable and/or writable, or to timeout if no file descriptor is available
in time. The wait can be controlled by calling gst_poll_restart() and
gst_poll_set_flushing().
Once the file descriptor set has been waited for, one can use
gst_poll_fd_has_closed() to see if the file descriptor has been closed,
gst_poll_fd_has_error() to see if it has generated an error,
gst_poll_fd_can_read() to see if it is possible to read from the file
descriptor, and gst_poll_fd_can_write() to see if it is possible to
write to it.</doc>
<method name="add_fd" c:identifier="gst_poll_add_fd">
<doc xml:space="preserve">Add a file descriptor to the file descriptor set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the file descriptor was successfully added to the set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_can_read" c:identifier="gst_poll_fd_can_read">
<doc xml:space="preserve">Check if @fd in @set has data to be read.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor has data to be read.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="const GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_can_write" c:identifier="gst_poll_fd_can_write">
<doc xml:space="preserve">Check if @fd in @set can be used for writing.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor can be used for writing.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="const GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_ctl_pri" c:identifier="gst_poll_fd_ctl_pri" version="1.16">
<doc xml:space="preserve">Control whether the descriptor @fd in @set will be monitored for
exceptional conditions (POLLPRI).
Not implemented on Windows (will just return %FALSE there).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor was successfully updated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">a new status.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="fd_ctl_read" c:identifier="gst_poll_fd_ctl_read">
<doc xml:space="preserve">Control whether the descriptor @fd in @set will be monitored for
readability.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor was successfully updated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">a new status.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="fd_ctl_write" c:identifier="gst_poll_fd_ctl_write">
<doc xml:space="preserve">Control whether the descriptor @fd in @set will be monitored for
writability.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor was successfully updated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">a new status.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="fd_has_closed" c:identifier="gst_poll_fd_has_closed">
<doc xml:space="preserve">Check if @fd in @set has closed the connection.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the connection was closed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="const GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_has_error" c:identifier="gst_poll_fd_has_error">
<doc xml:space="preserve">Check if @fd in @set has an error.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor has an error.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="const GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_has_pri" c:identifier="gst_poll_fd_has_pri" version="1.16">
<doc xml:space="preserve">Check if @fd in @set has an exceptional condition (POLLPRI).
Not implemented on Windows (will just return %FALSE there).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the descriptor has an exceptional condition.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="const GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="fd_ignored" c:identifier="gst_poll_fd_ignored">
<doc xml:space="preserve">Mark @fd as ignored so that the next call to gst_poll_wait() will yield
the same result for @fd as last time. This function must be called if no
operation (read/write/recv/send/etc.) will be performed on @fd before
the next call to gst_poll_wait().
The reason why this is needed is because the underlying implementation
might not allow querying the fd more than once between calls to one of
the re-enabling operations.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_poll_free">
<doc xml:space="preserve">Free a file descriptor set.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="full">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_read_gpollfd" c:identifier="gst_poll_get_read_gpollfd">
<doc xml:space="preserve">Get a GPollFD for the reading part of the control socket. This is useful when
integrating with a GSource and GMainLoop.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a #GPollFD</doc>
<type name="GLib.PollFD" c:type="GPollFD*"/>
</parameter>
</parameters>
</method>
<method name="read_control" c:identifier="gst_poll_read_control">
<doc xml:space="preserve">Read a byte from the control socket of the controllable @set.
This function only works for timer #GstPoll objects created with
gst_poll_new_timer().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success. %FALSE when when there was no byte to read or
reading the byte failed. If there was no byte to read, and only then, errno
will contain EWOULDBLOCK or EAGAIN. For all other values of errno this always signals a
critical error.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_fd" c:identifier="gst_poll_remove_fd">
<doc xml:space="preserve">Remove a file descriptor from the file descriptor set.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the file descriptor was successfully removed from the set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor set.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a file descriptor.</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</parameter>
</parameters>
</method>
<method name="restart" c:identifier="gst_poll_restart">
<doc xml:space="preserve">Restart any gst_poll_wait() that is in progress. This function is typically
used after adding or removing descriptors to @set.
If @set is not controllable, then this call will have no effect.
This function only works for non-timer #GstPoll objects created with
gst_poll_new().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_controllable" c:identifier="gst_poll_set_controllable">
<doc xml:space="preserve">When @controllable is %TRUE, this function ensures that future calls to
gst_poll_wait() will be affected by gst_poll_restart() and
gst_poll_set_flushing().
This function only works for non-timer #GstPoll objects created with
gst_poll_new().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the controllability of @set could be updated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="controllable" transfer-ownership="none">
<doc xml:space="preserve">new controllable state.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_flushing" c:identifier="gst_poll_set_flushing">
<doc xml:space="preserve">When @flushing is %TRUE, this function ensures that current and future calls
to gst_poll_wait() will return -1, with errno set to EBUSY.
Unsetting the flushing state will restore normal operation of @set.
This function only works for non-timer #GstPoll objects created with
gst_poll_new().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="flushing" transfer-ownership="none">
<doc xml:space="preserve">new flushing state.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="wait" c:identifier="gst_poll_wait">
<doc xml:space="preserve">Wait for activity on the file descriptors in @set. This function waits up to
the specified @timeout. A timeout of #GST_CLOCK_TIME_NONE waits forever.
For #GstPoll objects created with gst_poll_new(), this function can only be
called from a single thread at a time. If called from multiple threads,
-1 will be returned with errno set to EPERM.
This is not true for timer #GstPoll objects created with
gst_poll_new_timer(), where it is allowed to have multiple threads waiting
simultaneously.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of #GstPollFD in @set that have activity or 0 when no
activity was detected after @timeout. If an error occurs, -1 is returned
and errno is set.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
<parameter name="timeout" transfer-ownership="none">
<doc xml:space="preserve">a timeout in nanoseconds.</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="write_control" c:identifier="gst_poll_write_control">
<doc xml:space="preserve">Write a byte to the control socket of the controllable @set.
This function is mostly useful for timer #GstPoll objects created with
gst_poll_new_timer().
It will make any current and future gst_poll_wait() function return with
1, meaning the control socket is set. After an equal amount of calls to
gst_poll_read_control() have been performed, calls to gst_poll_wait() will
block again until their timeout expired.
This function only works for timer #GstPoll objects created with
gst_poll_new_timer().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success. %FALSE when when the byte could not be written.
errno contains the detailed error code but will never be EAGAIN, EINTR or
EWOULDBLOCK. %FALSE always signals a critical error.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="set" transfer-ownership="none">
<doc xml:space="preserve">a #GstPoll.</doc>
<type name="Poll" c:type="GstPoll*"/>
</instance-parameter>
</parameters>
</method>
<function name="new" c:identifier="gst_poll_new" introspectable="0">
<doc xml:space="preserve">Create a new file descriptor set. If @controllable, it
is possible to restart or flush a call to gst_poll_wait() with
gst_poll_restart() and gst_poll_set_flushing() respectively.
Free-function: gst_poll_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstPoll, or %NULL in
case of an error. Free with gst_poll_free().</doc>
<type name="Poll" c:type="GstPoll*"/>
</return-value>
<parameters>
<parameter name="controllable" transfer-ownership="none">
<doc xml:space="preserve">whether it should be possible to control a wait.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="new_timer" c:identifier="gst_poll_new_timer" introspectable="0">
<doc xml:space="preserve">Create a new poll object that can be used for scheduling cancellable
timeouts.
A timeout is performed with gst_poll_wait(). Multiple timeouts can be
performed from different threads.
Free-function: gst_poll_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstPoll, or %NULL in
case of an error. Free with gst_poll_free().</doc>
<type name="Poll" c:type="GstPoll*"/>
</return-value>
</function>
</record>
<record name="PollFD" c:type="GstPollFD">
<doc xml:space="preserve">A file descriptor object.</doc>
<field name="fd" writable="1">
<doc xml:space="preserve">a file descriptor</doc>
<type name="gint" c:type="int"/>
</field>
<field name="idx" readable="0" private="1">
<type name="gint" c:type="gint"/>
</field>
<method name="init" c:identifier="gst_poll_fd_init">
<doc xml:space="preserve">Initializes @fd. Alternatively you can initialize it with
#GST_POLL_FD_INIT.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="fd" transfer-ownership="none">
<doc xml:space="preserve">a #GstPollFD</doc>
<type name="PollFD" c:type="GstPollFD*"/>
</instance-parameter>
</parameters>
</method>
</record>
<interface name="Preset" c:symbol-prefix="preset" c:type="GstPreset" glib:type-name="GstPreset" glib:get-type="gst_preset_get_type" glib:type-struct="PresetInterface">
<doc xml:space="preserve">This interface offers methods to query and manipulate parameter preset sets.
A preset is a bunch of property settings, together with meta data and a name.
The name of a preset serves as key for subsequent method calls to manipulate
single presets.
All instances of one type will share the list of presets. The list is created
on demand, if presets are not used, the list is not created.
The interface comes with a default implementation that serves most plugins.
Wrapper plugins will override most methods to implement support for the
native preset format of those wrapped plugins.
One method that is useful to be overridden is gst_preset_get_property_names().
With that one can control which properties are saved and in which order.
When implementing support for read-only presets, one should set the vmethods
for gst_preset_save_preset() and gst_preset_delete_preset() to %NULL.
Applications can use gst_preset_is_editable() to check for that.
The default implementation supports presets located in a system directory,
application specific directory and in the users home directory. When getting
a list of presets individual presets are read and overlaid in 1) system,
2) application and 3) user order. Whenever an earlier entry is newer, the
later entries will be updated. Since 1.8 you can also provide extra paths
where to find presets through the GST_PRESET_PATH environment variable.
Presets found in those paths will be considered as "app presets".</doc>
<function name="get_app_dir" c:identifier="gst_preset_get_app_dir">
<doc xml:space="preserve">Gets the directory for application specific presets if set by the
application.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the directory or %NULL, don't free or modify
the string</doc>
<type name="filename" c:type="const gchar*"/>
</return-value>
</function>
<function name="set_app_dir" c:identifier="gst_preset_set_app_dir">
<doc xml:space="preserve">Sets an extra directory as an absolute path that should be considered when
looking for presets. Any presets in the application dir will shadow the
system presets.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if the dir already has been set</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="app_dir" transfer-ownership="none">
<doc xml:space="preserve">the application specific preset dir</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<virtual-method name="delete_preset" invoker="delete_preset">
<doc xml:space="preserve">Delete the given preset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_meta" invoker="get_meta">
<doc xml:space="preserve">Gets the @value for an existing meta data @tag. Meta data @tag names can be
something like e.g. "comment". Returned values need to be released when done.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name
or no value for the given @tag</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">value</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="get_preset_names" invoker="get_preset_names">
<doc xml:space="preserve">Get a copy of preset names as a %NULL terminated string array.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">
list with names, use g_strfreev() after usage.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="get_property_names" invoker="get_property_names">
<doc xml:space="preserve">Get a the names of the GObject properties that can be used for presets.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">an
array of property names which should be freed with g_strfreev() after use.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="load_preset" invoker="load_preset">
<doc xml:space="preserve">Load the given preset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to load</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="rename_preset" invoker="rename_preset">
<doc xml:space="preserve">Renames a preset. If there is already a preset by the @new_name it will be
overwritten.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with @old_name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="old_name" transfer-ownership="none">
<doc xml:space="preserve">current preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="new_name" transfer-ownership="none">
<doc xml:space="preserve">new preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="save_preset" invoker="save_preset">
<doc xml:space="preserve">Save the current object settings as a preset under the given name. If there
is already a preset by this @name it will be overwritten.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to save</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="set_meta" invoker="set_meta">
<doc xml:space="preserve">Sets a new @value for an existing meta data item or adds a new item. Meta
data @tag names can be something like e.g. "comment". Supplying %NULL for the
@value will unset an existing value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">new value</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<method name="delete_preset" c:identifier="gst_preset_delete_preset">
<doc xml:space="preserve">Delete the given preset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_meta" c:identifier="gst_preset_get_meta">
<doc xml:space="preserve">Gets the @value for an existing meta data @tag. Meta data @tag names can be
something like e.g. "comment". Returned values need to be released when done.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name
or no value for the given @tag</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">value</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="get_preset_names" c:identifier="gst_preset_get_preset_names">
<doc xml:space="preserve">Get a copy of preset names as a %NULL terminated string array.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">
list with names, use g_strfreev() after usage.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_property_names" c:identifier="gst_preset_get_property_names">
<doc xml:space="preserve">Get a the names of the GObject properties that can be used for presets.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">an
array of property names which should be freed with g_strfreev() after use.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_editable" c:identifier="gst_preset_is_editable" version="1.6">
<doc xml:space="preserve">Check if one can add new presets, change existing ones and remove presets.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if presets are editable or %FALSE if they are static</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
</parameters>
</method>
<method name="load_preset" c:identifier="gst_preset_load_preset">
<doc xml:space="preserve">Load the given preset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to load</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="rename_preset" c:identifier="gst_preset_rename_preset">
<doc xml:space="preserve">Renames a preset. If there is already a preset by the @new_name it will be
overwritten.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with @old_name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="old_name" transfer-ownership="none">
<doc xml:space="preserve">current preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="new_name" transfer-ownership="none">
<doc xml:space="preserve">new preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="save_preset" c:identifier="gst_preset_save_preset">
<doc xml:space="preserve">Save the current object settings as a preset under the given name. If there
is already a preset by this @name it will be overwritten.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to save</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_meta" c:identifier="gst_preset_set_meta">
<doc xml:space="preserve">Sets a new @value for an existing meta data item or adds a new item. Meta
data @tag names can be something like e.g. "comment". Supplying %NULL for the
@value will unset an existing value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">new value</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
</interface>
<record name="PresetInterface" c:type="GstPresetInterface" glib:is-gtype-struct-for="Preset">
<doc xml:space="preserve">#GstPreset interface.</doc>
<field name="parent">
<doc xml:space="preserve">parent interface type.</doc>
<type name="GObject.TypeInterface" c:type="GTypeInterface"/>
</field>
<field name="get_preset_names">
<callback name="get_preset_names">
<return-value transfer-ownership="full">
<doc xml:space="preserve">
list with names, use g_strfreev() after usage.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_property_names">
<callback name="get_property_names">
<return-value transfer-ownership="full">
<doc xml:space="preserve">an
array of property names which should be freed with g_strfreev() after use.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="load_preset">
<callback name="load_preset">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to load</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="save_preset">
<callback name="save_preset">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to save</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="rename_preset">
<callback name="rename_preset">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with @old_name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="old_name" transfer-ownership="none">
<doc xml:space="preserve">current preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="new_name" transfer-ownership="none">
<doc xml:space="preserve">new preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="delete_preset">
<callback name="delete_preset">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_meta">
<callback name="set_meta">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">new value</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_meta">
<callback name="get_meta">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if e.g. there is no preset with that @name
or no value for the given @tag</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="preset" transfer-ownership="none">
<doc xml:space="preserve">a #GObject that implements #GstPreset</doc>
<type name="Preset" c:type="GstPreset*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">preset name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">meta data item name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">value</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<enumeration name="ProgressType" glib:type-name="GstProgressType" glib:get-type="gst_progress_type_get_type" c:type="GstProgressType">
<doc xml:space="preserve">The type of a %GST_MESSAGE_PROGRESS. The progress messages inform the
application of the status of asynchronous tasks.</doc>
<member name="start" value="0" c:identifier="GST_PROGRESS_TYPE_START" glib:nick="start">
<doc xml:space="preserve">A new task started.</doc>
</member>
<member name="continue" value="1" c:identifier="GST_PROGRESS_TYPE_CONTINUE" glib:nick="continue">
<doc xml:space="preserve">A task completed and a new one continues.</doc>
</member>
<member name="complete" value="2" c:identifier="GST_PROGRESS_TYPE_COMPLETE" glib:nick="complete">
<doc xml:space="preserve">A task completed.</doc>
</member>
<member name="canceled" value="3" c:identifier="GST_PROGRESS_TYPE_CANCELED" glib:nick="canceled">
<doc xml:space="preserve">A task was canceled.</doc>
</member>
<member name="error" value="4" c:identifier="GST_PROGRESS_TYPE_ERROR" glib:nick="error">
<doc xml:space="preserve">A task caused an error. An error message is also
posted on the bus.</doc>
</member>
</enumeration>
<record name="Promise" c:type="GstPromise" version="1.14" glib:type-name="GstPromise" glib:get-type="gst_promise_get_type" c:symbol-prefix="promise">
<doc xml:space="preserve">The #GstPromise object implements the container for values that may
be available later. i.e. a Future or a Promise in
&lt;https://en.wikipedia.org/wiki/Futures_and_promises&gt;.
As with all Future/Promise-like functionality, there is the concept of the
producer of the value and the consumer of the value.
A #GstPromise is created with gst_promise_new() by the consumer and passed
to the producer to avoid thread safety issues with the change callback.
A #GstPromise can be replied to with a value (or an error) by the producer
with gst_promise_reply(). The exact value returned is defined by the API
contract of the producer and %NULL may be a valid reply.
gst_promise_interrupt() is for the consumer to
indicate to the producer that the value is not needed anymore and producing
that value can stop. The @GST_PROMISE_RESULT_EXPIRED state set by a call
to gst_promise_expire() indicates to the consumer that a value will never
be produced and is intended to be called by a third party that implements
some notion of message handling such as #GstBus.
A callback can also be installed at #GstPromise creation for
result changes with gst_promise_new_with_change_func().
The change callback can be used to chain #GstPromises's together as in the
following example.
|[&lt;!-- language="C" --&gt;
const GstStructure *reply;
GstPromise *p;
if (gst_promise_wait (promise) != GST_PROMISE_RESULT_REPLIED)
return; // interrupted or expired value
reply = gst_promise_get_reply (promise);
if (error in reply)
return; // propagate error
p = gst_promise_new_with_change_func (another_promise_change_func, user_data, notify);
pass p to promise-using API
]|
Each #GstPromise starts out with a #GstPromiseResult of
%GST_PROMISE_RESULT_PENDING and only ever transitions once
into one of the other #GstPromiseResult's.
In order to support multi-threaded code, gst_promise_reply(),
gst_promise_interrupt() and gst_promise_expire() may all be from
different threads with some restrictions and the final result of the promise
is whichever call is made first. There are two restrictions on ordering:
1. That gst_promise_reply() and gst_promise_interrupt() cannot be called
after gst_promise_expire()
2. That gst_promise_reply() and gst_promise_interrupt()
cannot be called twice.
The change function set with gst_promise_new_with_change_func() is
called directly from either the gst_promise_reply(),
gst_promise_interrupt() or gst_promise_expire() and can be called
from an arbitrary thread. #GstPromise using APIs can restrict this to
a single thread or a subset of threads but that is entirely up to the API
that uses #GstPromise.</doc>
<field name="parent" writable="1">
<doc xml:space="preserve">parent #GstMiniObject</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<constructor name="new" c:identifier="gst_promise_new" version="1.14">
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</return-value>
</constructor>
<constructor name="new_with_change_func" c:identifier="gst_promise_new_with_change_func" version="1.14">
<doc xml:space="preserve">@func will be called exactly once when transitioning out of
%GST_PROMISE_RESULT_PENDING into any of the other #GstPromiseResult
states.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</return-value>
<parameters>
<parameter name="func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">a #GstPromiseChangeFunc to call</doc>
<type name="PromiseChangeFunc" c:type="GstPromiseChangeFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">argument to call @func with</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">notification function that @user_data is no longer needed</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</constructor>
<method name="expire" c:identifier="gst_promise_expire" version="1.14">
<doc xml:space="preserve">Expire a @promise. This will wake up any waiters with
%GST_PROMISE_RESULT_EXPIRED. Called by a message loop when the parent
message is handled and/or destroyed (possibly unanswered).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="promise" transfer-ownership="none">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_reply" c:identifier="gst_promise_get_reply" version="1.14">
<doc xml:space="preserve">Retrieve the reply set on @promise. @promise must be in
%GST_PROMISE_RESULT_REPLIED and the returned structure is owned by @promise</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The reply set on @promise</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="promise" transfer-ownership="none">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</instance-parameter>
</parameters>
</method>
<method name="interrupt" c:identifier="gst_promise_interrupt" version="1.14">
<doc xml:space="preserve">Interrupt waiting for a @promise. This will wake up any waiters with
%GST_PROMISE_RESULT_INTERRUPTED. Called when the consumer does not want
the value produced anymore.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="promise" transfer-ownership="none">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</instance-parameter>
</parameters>
</method>
<method name="reply" c:identifier="gst_promise_reply" version="1.14">
<doc xml:space="preserve">Set a reply on @promise. This will wake up any waiters with
%GST_PROMISE_RESULT_REPLIED. Called by the producer of the value to
indicate success (or failure).
If @promise has already been interrupted by the consumer, then this reply
is not visible to the consumer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="promise" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</instance-parameter>
<parameter name="s" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstStructure with the the reply contents</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="wait" c:identifier="gst_promise_wait" version="1.14">
<doc xml:space="preserve">Wait for @promise to move out of the %GST_PROMISE_RESULT_PENDING state.
If @promise is not in %GST_PROMISE_RESULT_PENDING then it will return
immediately with the current result.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the result of the promise</doc>
<type name="PromiseResult" c:type="GstPromiseResult"/>
</return-value>
<parameters>
<instance-parameter name="promise" transfer-ownership="none">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</instance-parameter>
</parameters>
</method>
</record>
<callback name="PromiseChangeFunc" c:type="GstPromiseChangeFunc" version="1.14">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="promise" transfer-ownership="none">
<doc xml:space="preserve">a #GstPromise</doc>
<type name="Promise" c:type="GstPromise*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<enumeration name="PromiseResult" version="1.14" glib:type-name="GstPromiseResult" glib:get-type="gst_promise_result_get_type" c:type="GstPromiseResult">
<doc xml:space="preserve">The result of a #GstPromise</doc>
<member name="pending" value="0" c:identifier="GST_PROMISE_RESULT_PENDING" glib:nick="pending">
<doc xml:space="preserve">Initial state. Waiting for transition to any
other state.</doc>
</member>
<member name="interrupted" value="1" c:identifier="GST_PROMISE_RESULT_INTERRUPTED" glib:nick="interrupted">
<doc xml:space="preserve">Interrupted by the consumer as it doesn't
want the value anymore.</doc>
</member>
<member name="replied" value="2" c:identifier="GST_PROMISE_RESULT_REPLIED" glib:nick="replied">
<doc xml:space="preserve">A producer marked a reply</doc>
</member>
<member name="expired" value="3" c:identifier="GST_PROMISE_RESULT_EXPIRED" glib:nick="expired">
<doc xml:space="preserve">The promise expired (the carrying object
lost all refs) and the promise will never be fulfilled.</doc>
</member>
</enumeration>
<record name="ProtectionMeta" c:type="GstProtectionMeta" version="1.6">
<doc xml:space="preserve">Metadata type that holds information about a sample from a protection-protected
track, including the information needed to decrypt it (if it is encrypted).</doc>
<field name="meta" writable="1">
<doc xml:space="preserve">the parent #GstMeta.</doc>
<type name="Meta" c:type="GstMeta"/>
</field>
<field name="info" writable="1">
<doc xml:space="preserve">the cryptographic information needed to decrypt the sample.</doc>
<type name="Structure" c:type="GstStructure*"/>
</field>
<function name="get_info" c:identifier="gst_protection_meta_get_info">
<return-value transfer-ownership="none">
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
</record>
<class name="ProxyPad" c:symbol-prefix="proxy_pad" c:type="GstProxyPad" parent="Pad" glib:type-name="GstProxyPad" glib:get-type="gst_proxy_pad_get_type" glib:type-struct="ProxyPadClass">
<function name="chain_default" c:identifier="gst_proxy_pad_chain_default">
<doc xml:space="preserve">Invoke the default chain function of the proxy pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad, returns GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="buffer" transfer-ownership="full">
<doc xml:space="preserve">the #GstBuffer to send, return GST_FLOW_ERROR
if not.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</function>
<function name="chain_list_default" c:identifier="gst_proxy_pad_chain_list_default">
<doc xml:space="preserve">Invoke the default chain list function of the proxy pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a sink #GstPad, returns GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="list" transfer-ownership="full">
<doc xml:space="preserve">the #GstBufferList to send, return GST_FLOW_ERROR
if not.</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</parameter>
</parameters>
</function>
<function name="getrange_default" c:identifier="gst_proxy_pad_getrange_default">
<doc xml:space="preserve">Invoke the default getrange function of the proxy pad.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn from the pad.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">a src #GstPad, returns #GST_FLOW_ERROR if not.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none">
<doc xml:space="preserve">the parent of @pad</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">The start offset of the buffer</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">The length of the buffer</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="buffer" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to hold the #GstBuffer,
returns #GST_FLOW_ERROR if %NULL.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
</parameters>
</function>
<function name="iterate_internal_links_default" c:identifier="gst_proxy_pad_iterate_internal_links_default">
<doc xml:space="preserve">Invoke the default iterate internal links function of the proxy pad.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstIterator of #GstPad, or %NULL if @pad
has no parent. Unref each returned pad with gst_object_unref().</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
<parameters>
<parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstPad to get the internal links of.</doc>
<type name="Pad" c:type="GstPad*"/>
</parameter>
<parameter name="parent" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the parent of @pad or %NULL</doc>
<type name="Object" c:type="GstObject*"/>
</parameter>
</parameters>
</function>
<method name="get_internal" c:identifier="gst_proxy_pad_get_internal">
<doc xml:space="preserve">Get the internal pad of @pad. Unref target pad after usage.
The internal pad of a #GstGhostPad is the internally used
pad of opposite direction, which is used to link to the target.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the target #GstProxyPad, can
be %NULL. Unref target pad after usage.</doc>
<type name="ProxyPad" c:type="GstProxyPad*"/>
</return-value>
<parameters>
<instance-parameter name="pad" transfer-ownership="none">
<doc xml:space="preserve">the #GstProxyPad</doc>
<type name="ProxyPad" c:type="GstProxyPad*"/>
</instance-parameter>
</parameters>
</method>
<field name="pad">
<type name="Pad" c:type="GstPad"/>
</field>
<field name="priv" readable="0" private="1">
<type name="ProxyPadPrivate" c:type="GstProxyPadPrivate*"/>
</field>
</class>
<record name="ProxyPadClass" c:type="GstProxyPadClass" glib:is-gtype-struct-for="ProxyPad">
<field name="parent_class">
<type name="PadClass" c:type="GstPadClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="1">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="ProxyPadPrivate" c:type="GstProxyPadPrivate" disguised="1"/>
<enumeration name="QOSType" glib:type-name="GstQOSType" glib:get-type="gst_qos_type_get_type" c:type="GstQOSType">
<doc xml:space="preserve">The different types of QoS events that can be given to the
gst_event_new_qos() method.</doc>
<member name="overflow" value="0" c:identifier="GST_QOS_TYPE_OVERFLOW" glib:nick="overflow">
<doc xml:space="preserve">The QoS event type that is produced when upstream
elements are producing data too quickly and the element can't keep up
processing the data. Upstream should reduce their production rate. This
type is also used when buffers arrive early or in time.</doc>
</member>
<member name="underflow" value="1" c:identifier="GST_QOS_TYPE_UNDERFLOW" glib:nick="underflow">
<doc xml:space="preserve">The QoS event type that is produced when upstream
elements are producing data too slowly and need to speed up their
production rate.</doc>
</member>
<member name="throttle" value="2" c:identifier="GST_QOS_TYPE_THROTTLE" glib:nick="throttle">
<doc xml:space="preserve">The QoS event type that is produced when the
application enabled throttling to limit the data rate.</doc>
</member>
</enumeration>
<function-macro name="QUERY" c:identifier="GST_QUERY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="QUERY_CAST" c:identifier="GST_QUERY_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="QUERY_IS_DOWNSTREAM" c:identifier="GST_QUERY_IS_DOWNSTREAM" introspectable="0">
<doc xml:space="preserve">Check if an query can travel downstream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the query to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="QUERY_IS_SERIALIZED" c:identifier="GST_QUERY_IS_SERIALIZED" introspectable="0">
<doc xml:space="preserve">Check if an query is serialized with the data stream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the query to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="QUERY_IS_UPSTREAM" c:identifier="GST_QUERY_IS_UPSTREAM" introspectable="0">
<doc xml:space="preserve">Check if an query can travel upstream.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">the query to query</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="QUERY_MAKE_TYPE" c:identifier="GST_QUERY_MAKE_TYPE" introspectable="0">
<doc xml:space="preserve">when making custom query types, use this macro with the num and
the given flags</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">the query number to create</doc>
</parameter>
<parameter name="flags">
<doc xml:space="preserve">the query flags</doc>
</parameter>
</parameters>
</function-macro>
<constant name="QUERY_NUM_SHIFT" value="8" c:type="GST_QUERY_NUM_SHIFT">
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="QUERY_TYPE" c:identifier="GST_QUERY_TYPE" introspectable="0">
<doc xml:space="preserve">Get the #GstQueryType of the query.</doc>
<parameters>
<parameter name="query">
<doc xml:space="preserve">the query to query</doc>
</parameter>
</parameters>
</function-macro>
<constant name="QUERY_TYPE_BOTH" value="3" c:type="GST_QUERY_TYPE_BOTH">
<doc xml:space="preserve">The same thing as #GST_QUERY_TYPE_UPSTREAM | #GST_QUERY_TYPE_DOWNSTREAM.</doc>
<type name="QueryTypeFlags" c:type="GstQueryTypeFlags"/>
</constant>
<function-macro name="QUERY_TYPE_NAME" c:identifier="GST_QUERY_TYPE_NAME" introspectable="0">
<doc xml:space="preserve">Get a constant string representation of the #GstQueryType of the query.</doc>
<parameters>
<parameter name="query">
<doc xml:space="preserve">the query to query</doc>
</parameter>
</parameters>
</function-macro>
<record name="Query" c:type="GstQuery" glib:type-name="GstQuery" glib:get-type="gst_query_get_type" c:symbol-prefix="query">
<doc xml:space="preserve">Queries can be performed on pads (gst_pad_query()) and elements
(gst_element_query()). Please note that some queries might need a running
pipeline to work.
Queries can be created using the gst_query_new_*() functions.
Query values can be set using gst_query_set_*(), and parsed using
gst_query_parse_*() helpers.
The following example shows how to query the duration of a pipeline:
|[&lt;!-- language="C" --&gt;
GstQuery *query;
gboolean res;
query = gst_query_new_duration (GST_FORMAT_TIME);
res = gst_element_query (pipeline, query);
if (res) {
gint64 duration;
gst_query_parse_duration (query, NULL, &amp;amp;duration);
g_print ("duration = %"GST_TIME_FORMAT, GST_TIME_ARGS (duration));
} else {
g_print ("duration query failed...");
}
gst_query_unref (query);
]|</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">The parent #GstMiniObject type</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<field name="type" writable="1">
<doc xml:space="preserve">the #GstQueryType</doc>
<type name="QueryType" c:type="GstQueryType"/>
</field>
<constructor name="new_accept_caps" c:identifier="gst_query_new_accept_caps">
<doc xml:space="preserve">Constructs a new query object for querying if @caps are accepted.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">a fixed #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_allocation" c:identifier="gst_query_new_allocation">
<doc xml:space="preserve">Constructs a new query object for querying the allocation properties.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the negotiated caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="need_pool" transfer-ownership="none">
<doc xml:space="preserve">return a pool</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_bitrate" c:identifier="gst_query_new_bitrate" version="1.16">
<doc xml:space="preserve">Constructs a new query object for querying the bitrate.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<constructor name="new_buffering" c:identifier="gst_query_new_buffering">
<doc xml:space="preserve">Constructs a new query object for querying the buffering status of
a stream.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the default #GstFormat for the new query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_caps" c:identifier="gst_query_new_caps">
<doc xml:space="preserve">Constructs a new query object for querying the caps.
The CAPS query should return the allowable caps for a pad in the context
of the element's state, its link to other elements, and the devices or files
it has opened. These caps must be a subset of the pad template caps. In the
NULL state with no links, the CAPS query should ideally return the same caps
as the pad template. In rare circumstances, an object property can affect
the caps returned by the CAPS query, but this is discouraged.
For most filters, the caps returned by CAPS query is directly affected by the
allowed caps on other pads. For demuxers and decoders, the caps returned by
the srcpad's getcaps function is directly related to the stream data. Again,
the CAPS query should return the most specific caps it reasonably can, since this
helps with autoplugging.
The @filter is used to restrict the result caps, only the caps matching
@filter should be returned from the CAPS query. Specifying a filter might
greatly reduce the amount of processing an element needs to do.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="filter" transfer-ownership="none">
<doc xml:space="preserve">a filter</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_context" c:identifier="gst_query_new_context" version="1.2">
<doc xml:space="preserve">Constructs a new query object for querying the pipeline-local context.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="context_type" transfer-ownership="none">
<doc xml:space="preserve">Context type to query</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_convert" c:identifier="gst_query_new_convert">
<doc xml:space="preserve">Constructs a new convert query object. Use gst_query_unref()
when done with it. A convert query is used to ask for a conversion between
one format and another.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="src_format" transfer-ownership="none">
<doc xml:space="preserve">the source #GstFormat for the new query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the value to convert</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="dest_format" transfer-ownership="none">
<doc xml:space="preserve">the target #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_custom" c:identifier="gst_query_new_custom">
<doc xml:space="preserve">Constructs a new custom query object. Use gst_query_unref()
when done with it.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the query type</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
<parameter name="structure" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">a structure for the query</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_drain" c:identifier="gst_query_new_drain">
<doc xml:space="preserve">Constructs a new query object for querying the drain state.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<constructor name="new_duration" c:identifier="gst_query_new_duration">
<doc xml:space="preserve">Constructs a new stream duration query object to query in the given format.
Use gst_query_unref() when done with it. A duration query will give the
total length of the stream.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat for this duration query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_formats" c:identifier="gst_query_new_formats">
<doc xml:space="preserve">Constructs a new query object for querying formats of
the stream.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<constructor name="new_latency" c:identifier="gst_query_new_latency">
<doc xml:space="preserve">Constructs a new latency query object.
Use gst_query_unref() when done with it. A latency query is usually performed
by sinks to compensate for additional latency introduced by elements in the
pipeline.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<constructor name="new_position" c:identifier="gst_query_new_position">
<doc xml:space="preserve">Constructs a new query stream position query object. Use gst_query_unref()
when done with it. A position query is used to query the current position
of playback in the streams, in some format.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the default #GstFormat for the new query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_scheduling" c:identifier="gst_query_new_scheduling">
<doc xml:space="preserve">Constructs a new query object for querying the scheduling properties.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<constructor name="new_seeking" c:identifier="gst_query_new_seeking">
<doc xml:space="preserve">Constructs a new query object for querying seeking properties of
the stream.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the default #GstFormat for the new query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_segment" c:identifier="gst_query_new_segment">
<doc xml:space="preserve">Constructs a new segment query object. Use gst_query_unref()
when done with it. A segment query is used to discover information about the
currently configured segment for playback.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat for the new query</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_uri" c:identifier="gst_query_new_uri">
<doc xml:space="preserve">Constructs a new query URI query object. Use gst_query_unref()
when done with it. An URI query is used to query the current URI
that is used by the source or sink.
Free-function: gst_query_unref()</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
</constructor>
<method name="add_allocation_meta" c:identifier="gst_query_add_allocation_meta">
<doc xml:space="preserve">Add @api with @params as one of the supported metadata API to @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">the metadata API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">API specific parameters</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="add_allocation_param" c:identifier="gst_query_add_allocation_param">
<doc xml:space="preserve">Add @allocator and its @params as a supported memory allocator.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the memory allocator</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstAllocationParams</doc>
<type name="AllocationParams" c:type="const GstAllocationParams*"/>
</parameter>
</parameters>
</method>
<method name="add_allocation_pool" c:identifier="gst_query_add_allocation_pool">
<doc xml:space="preserve">Set the pool parameters in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_ALLOCATION.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="pool" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the buffer size</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_buffers" transfer-ownership="none">
<doc xml:space="preserve">the min buffers</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="max_buffers" transfer-ownership="none">
<doc xml:space="preserve">the max buffers</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="add_buffering_range" c:identifier="gst_query_add_buffering_range">
<doc xml:space="preserve">Set the buffering-ranges array field in @query. The current last
start position of the array should be inferior to @start.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #gboolean indicating if the range was added or not.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BUFFERING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">start position of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">stop position of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="add_scheduling_mode" c:identifier="gst_query_add_scheduling_mode">
<doc xml:space="preserve">Add @mode as one of the supported scheduling modes to @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SCHEDULING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">a #GstPadMode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_query_copy" introspectable="0">
<doc xml:space="preserve">Copies the given query using the copy function of the parent #GstStructure.
Free-function: gst_query_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @q.</doc>
<type name="Query" c:type="GstQuery*"/>
</return-value>
<parameters>
<instance-parameter name="q" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery to copy.</doc>
<type name="Query" c:type="const GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="find_allocation_meta" c:identifier="gst_query_find_allocation_meta">
<doc xml:space="preserve">Check if @query has metadata @api set. When this function returns %TRUE,
@index will contain the index where the requested API and the parameters
can be found.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @api is in the list of metadata.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">the metadata API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="index" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">the index</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="get_n_allocation_metas" c:identifier="gst_query_get_n_allocation_metas">
<doc xml:space="preserve">Retrieve the number of values currently stored in the
meta API array of the query's structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the metadata API array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_n_allocation_params" c:identifier="gst_query_get_n_allocation_params">
<doc xml:space="preserve">Retrieve the number of values currently stored in the
allocator params array of the query's structure.
If no memory allocator is specified, the downstream element can handle
the default memory allocator. The first memory allocator in the query
should be generic and allow mapping to system memory, all following
allocators should be ordered by preference with the preferred one first.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the allocator array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_n_allocation_pools" c:identifier="gst_query_get_n_allocation_pools">
<doc xml:space="preserve">Retrieve the number of values currently stored in the
pool array of the query's structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the pool array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_n_buffering_ranges" c:identifier="gst_query_get_n_buffering_ranges">
<doc xml:space="preserve">Retrieve the number of values currently stored in the
buffered-ranges array of the query's structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the range array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BUFFERING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_n_scheduling_modes" c:identifier="gst_query_get_n_scheduling_modes">
<doc xml:space="preserve">Retrieve the number of values currently stored in the
scheduling mode array of the query's structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the scheduling mode array size as a #guint.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SCHEDULING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_structure" c:identifier="gst_query_get_structure">
<doc xml:space="preserve">Get the structure of a query.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstStructure of the query. The
structure is still owned by the query and will therefore be freed when the
query is unreffed.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_scheduling_mode" c:identifier="gst_query_has_scheduling_mode">
<doc xml:space="preserve">Check if @query has scheduling mode set.
&gt; When checking if upstream supports pull mode, it is usually not
&gt; enough to just check for GST_PAD_MODE_PULL with this function, you
&gt; also want to check whether the scheduling flags returned by
&gt; gst_query_parse_scheduling() have the seeking flag set (meaning
&gt; random access is supported, not only sequential pulls).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @mode is in the list of scheduling modes.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SCHEDULING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the scheduling mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
</parameters>
</method>
<method name="has_scheduling_mode_with_flags" c:identifier="gst_query_has_scheduling_mode_with_flags">
<doc xml:space="preserve">Check if @query has scheduling mode set and @flags is set in
query scheduling flags.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @mode is in the list of scheduling modes
and @flags are compatible with query flags.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SCHEDULING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the scheduling mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstSchedulingFlags</doc>
<type name="SchedulingFlags" c:type="GstSchedulingFlags"/>
</parameter>
</parameters>
</method>
<method name="parse_accept_caps" c:identifier="gst_query_parse_accept_caps">
<doc xml:space="preserve">Get the caps from @query. The caps remains valid as long as @query remains
valid.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The query to parse</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="caps" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the caps</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
</parameters>
</method>
<method name="parse_accept_caps_result" c:identifier="gst_query_parse_accept_caps_result">
<doc xml:space="preserve">Parse the result from @query and store in @result.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ACCEPT_CAPS type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="result" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">location for the result</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_allocation" c:identifier="gst_query_parse_allocation">
<doc xml:space="preserve">Parse an allocation query, writing the requested caps in @caps and
whether a pool is needed in @need_pool, if the respective parameters
are non-%NULL.
Pool details can be retrieved using gst_query_get_n_allocation_pools() and
gst_query_parse_nth_allocation_pool().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="caps" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">The #GstCaps</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="need_pool" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">Whether a #GstBufferPool is needed</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="parse_bitrate" c:identifier="gst_query_parse_bitrate" version="1.16">
<doc xml:space="preserve">Get the results of a bitrate query. See also gst_query_set_bitrate().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BITRATE type #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="nominal_bitrate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">The resulting bitrate in bits per second</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_buffering_percent" c:identifier="gst_query_parse_buffering_percent">
<doc xml:space="preserve">Get the percentage of buffered data. This is a value between 0 and 100.
The @busy indicator is %TRUE when the buffering is in progress.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_BUFFERING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="busy" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">if buffering is busy, or %NULL</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="percent" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a buffering percent, or %NULL</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="parse_buffering_range" c:identifier="gst_query_parse_buffering_range">
<doc xml:space="preserve">Parse an available query, writing the format into @format, and
other results into the passed parameters, if the respective parameters
are non-%NULL</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BUFFERING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the format to set for the @segment_start
and @segment_end values, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="start" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the start to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="stop" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the stop to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="estimated_total" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">estimated total amount of download
time remaining in milliseconds, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_buffering_stats" c:identifier="gst_query_parse_buffering_stats">
<doc xml:space="preserve">Extracts the buffering stats values from @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_BUFFERING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="mode" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a buffering mode, or %NULL</doc>
<type name="BufferingMode" c:type="GstBufferingMode*"/>
</parameter>
<parameter name="avg_in" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the average input rate, or %NULL</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="avg_out" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the average output rat, or %NULL</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="buffering_left" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">amount of buffering time left in
milliseconds, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_caps" c:identifier="gst_query_parse_caps">
<doc xml:space="preserve">Get the filter from the caps @query. The caps remains valid as long as
@query remains valid.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The query to parse</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="filter" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the caps filter</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
</parameters>
</method>
<method name="parse_caps_result" c:identifier="gst_query_parse_caps_result">
<doc xml:space="preserve">Get the caps result from @query. The caps remains valid as long as
@query remains valid.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The query to parse</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="caps" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the caps</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
</parameters>
</method>
<method name="parse_context" c:identifier="gst_query_parse_context" version="1.2">
<doc xml:space="preserve">Get the context from the context @query. The context remains valid as long as
@query remains valid.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The query to parse</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="context" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">A pointer to store the #GstContext</doc>
<type name="Context" c:type="GstContext**"/>
</parameter>
</parameters>
</method>
<method name="parse_context_type" c:identifier="gst_query_parse_context_type" version="1.2">
<doc xml:space="preserve">Parse a context type from an existing GST_QUERY_CONTEXT query.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #gboolean indicating if the parsing succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_CONTEXT type query</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="context_type" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">the context type, or %NULL</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_convert" c:identifier="gst_query_parse_convert">
<doc xml:space="preserve">Parse a convert query answer. Any of @src_format, @src_value, @dest_format,
and @dest_value may be %NULL, in which case that value is omitted.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="src_format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the #GstFormat of the
source value, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="src_value" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the source value, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="dest_format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the #GstFormat of the
destination value, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="dest_value" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the destination value,
or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_duration" c:identifier="gst_query_parse_duration">
<doc xml:space="preserve">Parse a duration query answer. Write the format of the duration into @format,
and the value into @duration, if the respective variables are non-%NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the #GstFormat of the duration
value, or %NULL.</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="duration" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the total duration, or %NULL.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_latency" c:identifier="gst_query_parse_latency">
<doc xml:space="preserve">Parse a latency query answer.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="live" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">storage for live or %NULL</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="min_latency" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the min latency or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="max_latency" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the max latency or %NULL</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="parse_n_formats" c:identifier="gst_query_parse_n_formats">
<doc xml:space="preserve">Parse the number of formats in the formats @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="n_formats" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the number of formats in this query.</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_allocation_meta" c:identifier="gst_query_parse_nth_allocation_meta">
<doc xml:space="preserve">Parse an available query and get the metadata API
at @index of the metadata API array.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GType of the metadata API at @index.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the metadata API array to read</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="params" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">API specific parameters</doc>
<type name="Structure" c:type="const GstStructure**"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_allocation_param" c:identifier="gst_query_parse_nth_allocation_param">
<doc xml:space="preserve">Parse an available query and get the allocator and its params
at @index of the allocator array.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the allocator array to read</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="allocator" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">variable to hold the result</doc>
<type name="Allocator" c:type="GstAllocator**"/>
</parameter>
<parameter name="params" direction="out" caller-allocates="1" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">parameters for the allocator</doc>
<type name="AllocationParams" c:type="GstAllocationParams*"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_allocation_pool" c:identifier="gst_query_parse_nth_allocation_pool">
<doc xml:space="preserve">Get the pool parameters in @query.
Unref @pool with gst_object_unref() when it's not needed any more.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_ALLOCATION.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">index to parse</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="pool" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool**"/>
</parameter>
<parameter name="size" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the buffer size</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="min_buffers" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the min buffers</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="max_buffers" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the max buffers</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_buffering_range" c:identifier="gst_query_parse_nth_buffering_range">
<doc xml:space="preserve">Parse an available query and get the start and stop values stored
at the @index of the buffered ranges array.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #gboolean indicating if the parsing succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BUFFERING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the buffered-ranges array to read</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="start" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the start position to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="stop" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the stop position to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_format" c:identifier="gst_query_parse_nth_format">
<doc xml:space="preserve">Parse the format query and retrieve the @nth format from it into
@format. If the list contains less elements than @nth, @format will be
set to GST_FORMAT_UNDEFINED.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="nth" transfer-ownership="none">
<doc xml:space="preserve">the nth format to retrieve.</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to store the nth format</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
</parameters>
</method>
<method name="parse_nth_scheduling_mode" c:identifier="gst_query_parse_nth_scheduling_mode">
<doc xml:space="preserve">Parse an available query and get the scheduling mode
at @index of the scheduling modes array.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstPadMode of the scheduling mode at @index.</doc>
<type name="PadMode" c:type="GstPadMode"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SCHEDULING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the scheduling modes array to read</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="parse_position" c:identifier="gst_query_parse_position">
<doc xml:space="preserve">Parse a position query, writing the format into @format, and the position
into @cur, if the respective parameters are non-%NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the #GstFormat of the
position values (may be %NULL)</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="cur" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the current position (may be %NULL)</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_scheduling" c:identifier="gst_query_parse_scheduling">
<doc xml:space="preserve">Set the scheduling properties.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_SCHEDULING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="flags" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">#GstSchedulingFlags</doc>
<type name="SchedulingFlags" c:type="GstSchedulingFlags*"/>
</parameter>
<parameter name="minsize" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the suggested minimum size of pull requests</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="maxsize" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the suggested maximum size of pull requests:</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="align" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the suggested alignment of pull requests</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="parse_seeking" c:identifier="gst_query_parse_seeking">
<doc xml:space="preserve">Parse a seeking query, writing the format into @format, and
other results into the passed parameters, if the respective parameters
are non-%NULL</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_SEEKING type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the format to set for the @segment_start
and @segment_end values, or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="seekable" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the seekable flag to set, or %NULL</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
<parameter name="segment_start" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the segment_start to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="segment_end" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the segment_end to set, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_segment" c:identifier="gst_query_parse_segment">
<doc xml:space="preserve">Parse a segment query answer. Any of @rate, @format, @start_value, and
@stop_value may be %NULL, which will cause this value to be omitted.
See gst_query_set_segment() for an explanation of the function arguments.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="rate" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the rate of the segment, or %NULL</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
<parameter name="format" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the #GstFormat of the values,
or %NULL</doc>
<type name="Format" c:type="GstFormat*"/>
</parameter>
<parameter name="start_value" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the start value, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="stop_value" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the stop value, or %NULL</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="parse_uri" c:identifier="gst_query_parse_uri">
<doc xml:space="preserve">Parse an URI query, writing the URI into @uri as a newly
allocated string, if the respective parameters are non-%NULL.
Free the string with g_free() after usage.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="uri" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the current URI
(may be %NULL)</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_uri_redirection" c:identifier="gst_query_parse_uri_redirection" version="1.2">
<doc xml:space="preserve">Parse an URI query, writing the URI into @uri as a newly
allocated string, if the respective parameters are non-%NULL.
Free the string with g_free() after usage.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="uri" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the redirect URI
(may be %NULL)</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="parse_uri_redirection_permanent" c:identifier="gst_query_parse_uri_redirection_permanent" version="1.4">
<doc xml:space="preserve">Parse an URI query, and set @permanent to %TRUE if there is a redirection
and it should be considered permanent. If a redirection is permanent,
applications should update their internal storage of the URI, otherwise
they should make all future requests to the original URI.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="permanent" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">if the URI redirection is permanent
(may be %NULL)</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="remove_nth_allocation_meta" c:identifier="gst_query_remove_nth_allocation_meta">
<doc xml:space="preserve">Remove the metadata API at @index of the metadata API array.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the metadata API array to remove</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="remove_nth_allocation_param" c:identifier="gst_query_remove_nth_allocation_param" version="1.2">
<doc xml:space="preserve">Remove the allocation param at @index of the allocation param array.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the allocation param array to remove</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="remove_nth_allocation_pool" c:identifier="gst_query_remove_nth_allocation_pool" version="1.2">
<doc xml:space="preserve">Remove the allocation pool at @index of the allocation pool array.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the allocation pool array to remove</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_accept_caps_result" c:identifier="gst_query_set_accept_caps_result">
<doc xml:space="preserve">Set @result as the result for the @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ACCEPT_CAPS type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="result" transfer-ownership="none">
<doc xml:space="preserve">the result to set</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="set_bitrate" c:identifier="gst_query_set_bitrate" version="1.16">
<doc xml:space="preserve">Set the results of a bitrate query. The nominal bitrate is the average
bitrate expected over the length of the stream as advertised in file
headers (or similar).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_BITRATE type #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="nominal_bitrate" transfer-ownership="none">
<doc xml:space="preserve">the nominal bitrate in bits per second</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_buffering_percent" c:identifier="gst_query_set_buffering_percent">
<doc xml:space="preserve">Set the percentage of buffered data. This is a value between 0 and 100.
The @busy indicator is %TRUE when the buffering is in progress.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_BUFFERING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="busy" transfer-ownership="none">
<doc xml:space="preserve">if buffering is busy</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="percent" transfer-ownership="none">
<doc xml:space="preserve">a buffering percent</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="set_buffering_range" c:identifier="gst_query_set_buffering_range">
<doc xml:space="preserve">Set the available query result fields in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format to set for the @start and @stop values</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start to set</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">the stop to set</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="estimated_total" transfer-ownership="none">
<doc xml:space="preserve">estimated total amount of download time remaining in
milliseconds</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_buffering_stats" c:identifier="gst_query_set_buffering_stats">
<doc xml:space="preserve">Configures the buffering stats values in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_BUFFERING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">a buffering mode</doc>
<type name="BufferingMode" c:type="GstBufferingMode"/>
</parameter>
<parameter name="avg_in" transfer-ownership="none">
<doc xml:space="preserve">the average input rate</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="avg_out" transfer-ownership="none">
<doc xml:space="preserve">the average output rate</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="buffering_left" transfer-ownership="none">
<doc xml:space="preserve">amount of buffering time left in milliseconds</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_caps_result" c:identifier="gst_query_set_caps_result">
<doc xml:space="preserve">Set the @caps result in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The query to use</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">A pointer to the caps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="set_context" c:identifier="gst_query_set_context" version="1.2">
<doc xml:space="preserve">Answer a context query by setting the requested context.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery with query type GST_QUERY_CONTEXT</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="context" transfer-ownership="none">
<doc xml:space="preserve">the requested #GstContext</doc>
<type name="Context" c:type="GstContext*"/>
</parameter>
</parameters>
</method>
<method name="set_convert" c:identifier="gst_query_set_convert">
<doc xml:space="preserve">Answer a convert query by setting the requested values.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="src_format" transfer-ownership="none">
<doc xml:space="preserve">the source #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="src_value" transfer-ownership="none">
<doc xml:space="preserve">the source value</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="dest_format" transfer-ownership="none">
<doc xml:space="preserve">the destination #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="dest_value" transfer-ownership="none">
<doc xml:space="preserve">the destination value</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_duration" c:identifier="gst_query_set_duration">
<doc xml:space="preserve">Answer a duration query by setting the requested value in the given format.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat for the duration</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="duration" transfer-ownership="none">
<doc xml:space="preserve">the duration of the stream</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_formats" c:identifier="gst_query_set_formats" introspectable="0">
<doc xml:space="preserve">Set the formats query result fields in @query. The number of formats passed
must be equal to @n_formats.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="n_formats" transfer-ownership="none">
<doc xml:space="preserve">the number of formats to set.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">A number of @GstFormats equal to @n_formats.</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="set_formatsv" c:identifier="gst_query_set_formatsv">
<doc xml:space="preserve">Set the formats query result fields in @query. The number of formats passed
in the @formats array must be equal to @n_formats.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="n_formats" transfer-ownership="none">
<doc xml:space="preserve">the number of formats to set.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="formats" transfer-ownership="none">
<doc xml:space="preserve">an array containing @n_formats
@GstFormat values.</doc>
<array length="0" zero-terminated="0" c:type="const GstFormat*">
<type name="Format" c:type="GstFormat"/>
</array>
</parameter>
</parameters>
</method>
<method name="set_latency" c:identifier="gst_query_set_latency">
<doc xml:space="preserve">Answer a latency query by setting the requested values in the given format.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="live" transfer-ownership="none">
<doc xml:space="preserve">if there is a live element upstream</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="min_latency" transfer-ownership="none">
<doc xml:space="preserve">the minimal latency of the upstream elements</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
<parameter name="max_latency" transfer-ownership="none">
<doc xml:space="preserve">the maximal latency of the upstream elements</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</parameter>
</parameters>
</method>
<method name="set_nth_allocation_param" c:identifier="gst_query_set_nth_allocation_param">
<doc xml:space="preserve">Parse an available query and get the allocator and its params
at @index of the allocator array.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a GST_QUERY_ALLOCATION type query #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">position in the allocator array to set</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="allocator" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">new allocator to set</doc>
<type name="Allocator" c:type="GstAllocator*"/>
</parameter>
<parameter name="params" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">parameters for the allocator</doc>
<type name="AllocationParams" c:type="const GstAllocationParams*"/>
</parameter>
</parameters>
</method>
<method name="set_nth_allocation_pool" c:identifier="gst_query_set_nth_allocation_pool">
<doc xml:space="preserve">Set the pool parameters in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_ALLOCATION.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">index to modify</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="pool" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstBufferPool</doc>
<type name="BufferPool" c:type="GstBufferPool*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the buffer size</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_buffers" transfer-ownership="none">
<doc xml:space="preserve">the min buffers</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="max_buffers" transfer-ownership="none">
<doc xml:space="preserve">the max buffers</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_position" c:identifier="gst_query_set_position">
<doc xml:space="preserve">Answer a position query by setting the requested value in the given format.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery with query type GST_QUERY_POSITION</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the requested #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="cur" transfer-ownership="none">
<doc xml:space="preserve">the position to set</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_scheduling" c:identifier="gst_query_set_scheduling">
<doc xml:space="preserve">Set the scheduling properties.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">A valid #GstQuery of type GST_QUERY_SCHEDULING.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">#GstSchedulingFlags</doc>
<type name="SchedulingFlags" c:type="GstSchedulingFlags"/>
</parameter>
<parameter name="minsize" transfer-ownership="none">
<doc xml:space="preserve">the suggested minimum size of pull requests</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="maxsize" transfer-ownership="none">
<doc xml:space="preserve">the suggested maximum size of pull requests</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="align" transfer-ownership="none">
<doc xml:space="preserve">the suggested alignment of pull requests</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="set_seeking" c:identifier="gst_query_set_seeking">
<doc xml:space="preserve">Set the seeking query result fields in @query.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format to set for the @segment_start and @segment_end values</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="seekable" transfer-ownership="none">
<doc xml:space="preserve">the seekable flag to set</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="segment_start" transfer-ownership="none">
<doc xml:space="preserve">the segment_start to set</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="segment_end" transfer-ownership="none">
<doc xml:space="preserve">the segment_end to set</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_segment" c:identifier="gst_query_set_segment">
<doc xml:space="preserve">Answer a segment query by setting the requested values. The normal
playback segment of a pipeline is 0 to duration at the default rate of
1.0. If a seek was performed on the pipeline to play a different
segment, this query will return the range specified in the last seek.
@start_value and @stop_value will respectively contain the configured
playback range start and stop values expressed in @format.
The values are always between 0 and the duration of the media and
@start_value &lt;= @stop_value. @rate will contain the playback rate. For
negative rates, playback will actually happen from @stop_value to
@start_value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">the rate of the segment</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the #GstFormat of the segment values (@start_value and @stop_value)</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="start_value" transfer-ownership="none">
<doc xml:space="preserve">the start value</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop_value" transfer-ownership="none">
<doc xml:space="preserve">the stop value</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_uri" c:identifier="gst_query_set_uri">
<doc xml:space="preserve">Answer a URI query by setting the requested URI.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery with query type GST_QUERY_URI</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">the URI to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_uri_redirection" c:identifier="gst_query_set_uri_redirection" version="1.2">
<doc xml:space="preserve">Answer a URI query by setting the requested URI redirection.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery with query type GST_QUERY_URI</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">the URI to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_uri_redirection_permanent" c:identifier="gst_query_set_uri_redirection_permanent" version="1.4">
<doc xml:space="preserve">Answer a URI query by setting the requested URI redirection
to permanent or not.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery with query type %GST_QUERY_URI</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
<parameter name="permanent" transfer-ownership="none">
<doc xml:space="preserve">whether the redirect is permanent or not</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_query_unref" introspectable="0">
<doc xml:space="preserve">Decreases the refcount of the query. If the refcount reaches 0, the query
will be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="q" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery to decrease the refcount of.</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<method name="writable_structure" c:identifier="gst_query_writable_structure">
<doc xml:space="preserve">Get the structure of a query. This method should be called with a writable
@query so that the returned structure is guaranteed to be writable.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstStructure of the query. The structure is
still owned by the query and will therefore be freed when the query
is unreffed.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">a #GstQuery</doc>
<type name="Query" c:type="GstQuery*"/>
</instance-parameter>
</parameters>
</method>
<function name="replace" c:identifier="gst_query_replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstQuery to point to a different #GstQuery. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
query is unreffed, the new one is reffed).
Either @new_query or the #GstQuery pointed to by @old_query may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_query was different from @old_query</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_query" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to a
#GstQuery to be replaced.</doc>
<type name="Query" c:type="GstQuery**"/>
</parameter>
<parameter name="new_query" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstQuery that will
replace the query pointed to by @old_query.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</function>
</record>
<enumeration name="QueryType" glib:type-name="GstQueryType" glib:get-type="gst_query_type_get_type" c:type="GstQueryType">
<doc xml:space="preserve">Standard predefined Query types</doc>
<member name="unknown" value="0" c:identifier="GST_QUERY_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">unknown query type</doc>
</member>
<member name="position" value="2563" c:identifier="GST_QUERY_POSITION" glib:nick="position">
<doc xml:space="preserve">current position in stream</doc>
</member>
<member name="duration" value="5123" c:identifier="GST_QUERY_DURATION" glib:nick="duration">
<doc xml:space="preserve">total duration of the stream</doc>
</member>
<member name="latency" value="7683" c:identifier="GST_QUERY_LATENCY" glib:nick="latency">
<doc xml:space="preserve">latency of stream</doc>
</member>
<member name="jitter" value="10243" c:identifier="GST_QUERY_JITTER" glib:nick="jitter">
<doc xml:space="preserve">current jitter of stream</doc>
</member>
<member name="rate" value="12803" c:identifier="GST_QUERY_RATE" glib:nick="rate">
<doc xml:space="preserve">current rate of the stream</doc>
</member>
<member name="seeking" value="15363" c:identifier="GST_QUERY_SEEKING" glib:nick="seeking">
<doc xml:space="preserve">seeking capabilities</doc>
</member>
<member name="segment" value="17923" c:identifier="GST_QUERY_SEGMENT" glib:nick="segment">
<doc xml:space="preserve">segment start/stop positions</doc>
</member>
<member name="convert" value="20483" c:identifier="GST_QUERY_CONVERT" glib:nick="convert">
<doc xml:space="preserve">convert values between formats</doc>
</member>
<member name="formats" value="23043" c:identifier="GST_QUERY_FORMATS" glib:nick="formats">
<doc xml:space="preserve">query supported formats for convert</doc>
</member>
<member name="buffering" value="28163" c:identifier="GST_QUERY_BUFFERING" glib:nick="buffering">
<doc xml:space="preserve">query available media for efficient seeking.</doc>
</member>
<member name="custom" value="30723" c:identifier="GST_QUERY_CUSTOM" glib:nick="custom">
<doc xml:space="preserve">a custom application or element defined query.</doc>
</member>
<member name="uri" value="33283" c:identifier="GST_QUERY_URI" glib:nick="uri">
<doc xml:space="preserve">query the URI of the source or sink.</doc>
</member>
<member name="allocation" value="35846" c:identifier="GST_QUERY_ALLOCATION" glib:nick="allocation">
<doc xml:space="preserve">the buffer allocation properties</doc>
</member>
<member name="scheduling" value="38401" c:identifier="GST_QUERY_SCHEDULING" glib:nick="scheduling">
<doc xml:space="preserve">the scheduling properties</doc>
</member>
<member name="accept_caps" value="40963" c:identifier="GST_QUERY_ACCEPT_CAPS" glib:nick="accept-caps">
<doc xml:space="preserve">the accept caps query</doc>
</member>
<member name="caps" value="43523" c:identifier="GST_QUERY_CAPS" glib:nick="caps">
<doc xml:space="preserve">the caps query</doc>
</member>
<member name="drain" value="46086" c:identifier="GST_QUERY_DRAIN" glib:nick="drain">
<doc xml:space="preserve">wait till all serialized data is consumed downstream</doc>
</member>
<member name="context" value="48643" c:identifier="GST_QUERY_CONTEXT" glib:nick="context">
<doc xml:space="preserve">query the pipeline-local context from
downstream or upstream (since 1.2)</doc>
</member>
<member name="bitrate" value="51202" c:identifier="GST_QUERY_BITRATE" glib:nick="bitrate">
<doc xml:space="preserve">the bitrate query (since 1.16)</doc>
</member>
<function name="get_flags" c:identifier="gst_query_type_get_flags">
<doc xml:space="preserve">Gets the #GstQueryTypeFlags associated with @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstQueryTypeFlags.</doc>
<type name="QueryTypeFlags" c:type="GstQueryTypeFlags"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstQueryType</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
<function name="get_name" c:identifier="gst_query_type_get_name">
<doc xml:space="preserve">Get a printable name for the given query type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the query.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the query type</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
<function name="to_quark" c:identifier="gst_query_type_to_quark">
<doc xml:space="preserve">Get the unique quark for the given query type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the query type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the query type</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
</enumeration>
<bitfield name="QueryTypeFlags" glib:type-name="GstQueryTypeFlags" glib:get-type="gst_query_type_flags_get_type" c:type="GstQueryTypeFlags">
<doc xml:space="preserve">#GstQueryTypeFlags indicate the aspects of the different #GstQueryType
values. You can get the type flags of a #GstQueryType with the
gst_query_type_get_flags() function.</doc>
<member name="upstream" value="1" c:identifier="GST_QUERY_TYPE_UPSTREAM" glib:nick="upstream">
<doc xml:space="preserve">Set if the query can travel upstream.</doc>
</member>
<member name="downstream" value="2" c:identifier="GST_QUERY_TYPE_DOWNSTREAM" glib:nick="downstream">
<doc xml:space="preserve">Set if the query can travel downstream.</doc>
</member>
<member name="serialized" value="4" c:identifier="GST_QUERY_TYPE_SERIALIZED" glib:nick="serialized">
<doc xml:space="preserve">Set if the query should be serialized with data
flow.</doc>
</member>
</bitfield>
<function-macro name="READ_UINT16_BE" c:identifier="GST_READ_UINT16_BE" introspectable="0">
<doc xml:space="preserve">Read a 16 bit unsigned integer value in big endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT16_LE" c:identifier="GST_READ_UINT16_LE" introspectable="0">
<doc xml:space="preserve">Read a 16 bit unsigned integer value in little endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT24_BE" c:identifier="GST_READ_UINT24_BE" introspectable="0">
<doc xml:space="preserve">Read a 24 bit unsigned integer value in big endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT24_LE" c:identifier="GST_READ_UINT24_LE" introspectable="0">
<doc xml:space="preserve">Read a 24 bit unsigned integer value in little endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT32_BE" c:identifier="GST_READ_UINT32_BE" introspectable="0">
<doc xml:space="preserve">Read a 32 bit unsigned integer value in big endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT32_LE" c:identifier="GST_READ_UINT32_LE" introspectable="0">
<doc xml:space="preserve">Read a 32 bit unsigned integer value in little endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT64_BE" c:identifier="GST_READ_UINT64_BE" introspectable="0">
<doc xml:space="preserve">Read a 64 bit unsigned integer value in big endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT64_LE" c:identifier="GST_READ_UINT64_LE" introspectable="0">
<doc xml:space="preserve">Read a 64 bit unsigned integer value in little endian format from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="READ_UINT8" c:identifier="GST_READ_UINT8" introspectable="0">
<doc xml:space="preserve">Read an 8 bit unsigned integer value from the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="REGISTRY" c:identifier="GST_REGISTRY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="REGISTRY_CLASS" c:identifier="GST_REGISTRY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="REGISTRY_GET_CLASS" c:identifier="GST_REGISTRY_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_128" c:identifier="GST_ROUND_DOWN_128" version="1.4" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 128.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_16" c:identifier="GST_ROUND_DOWN_16" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 16.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_2" c:identifier="GST_ROUND_DOWN_2" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 2.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_32" c:identifier="GST_ROUND_DOWN_32" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 32.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_4" c:identifier="GST_ROUND_DOWN_4" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 4.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_64" c:identifier="GST_ROUND_DOWN_64" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 64.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_8" c:identifier="GST_ROUND_DOWN_8" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of 8.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round down</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_DOWN_N" c:identifier="GST_ROUND_DOWN_N" introspectable="0">
<doc xml:space="preserve">Rounds an integer value down to the next multiple of @align. @align MUST be a
power of two.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integrer value to round down</doc>
</parameter>
<parameter name="align">
<doc xml:space="preserve">a power of two to round down to</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_128" c:identifier="GST_ROUND_UP_128" version="1.4" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 128.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_16" c:identifier="GST_ROUND_UP_16" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 16.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_2" c:identifier="GST_ROUND_UP_2" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 2.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_32" c:identifier="GST_ROUND_UP_32" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 32.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_4" c:identifier="GST_ROUND_UP_4" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 4.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_64" c:identifier="GST_ROUND_UP_64" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 64.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_8" c:identifier="GST_ROUND_UP_8" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of 8.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integer value to round up</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="ROUND_UP_N" c:identifier="GST_ROUND_UP_N" introspectable="0">
<doc xml:space="preserve">Rounds an integer value up to the next multiple of @align. @align MUST be a
power of two.</doc>
<parameters>
<parameter name="num">
<doc xml:space="preserve">integrer value to round up</doc>
</parameter>
<parameter name="align">
<doc xml:space="preserve">a power of two to round up to</doc>
</parameter>
</parameters>
</function-macro>
<enumeration name="Rank" glib:type-name="GstRank" glib:get-type="gst_rank_get_type" c:type="GstRank">
<doc xml:space="preserve">Element priority ranks. Defines the order in which the autoplugger (or
similar rank-picking mechanisms, such as e.g. gst_element_make_from_uri())
will choose this element over an alternative one with the same function.
These constants serve as a rough guidance for defining the rank of a
#GstPluginFeature. Any value is valid, including values bigger than
@GST_RANK_PRIMARY.</doc>
<member name="none" value="0" c:identifier="GST_RANK_NONE" glib:nick="none">
<doc xml:space="preserve">will be chosen last or not at all</doc>
</member>
<member name="marginal" value="64" c:identifier="GST_RANK_MARGINAL" glib:nick="marginal">
<doc xml:space="preserve">unlikely to be chosen</doc>
</member>
<member name="secondary" value="128" c:identifier="GST_RANK_SECONDARY" glib:nick="secondary">
<doc xml:space="preserve">likely to be chosen</doc>
</member>
<member name="primary" value="256" c:identifier="GST_RANK_PRIMARY" glib:nick="primary">
<doc xml:space="preserve">will be chosen first</doc>
</member>
</enumeration>
<record name="ReferenceTimestampMeta" c:type="GstReferenceTimestampMeta" version="1.14">
<doc xml:space="preserve">#GstReferenceTimestampMeta can be used to attach alternative timestamps and
possibly durations to a #GstBuffer. These are generally not according to
the pipeline clock and could be e.g. the NTP timestamp when the media was
captured.
The reference is stored as a #GstCaps in @reference. Examples of valid
references would be "timestamp/x-drivername-stream" for timestamps that are locally
generated by some driver named "drivername" when generating the stream,
e.g. based on a frame counter, or "timestamp/x-ntp, host=pool.ntp.org,
port=123" for timestamps based on a specific NTP server.</doc>
<field name="parent" writable="1">
<doc xml:space="preserve">the parent #GstMeta structure</doc>
<type name="Meta" c:type="GstMeta"/>
</field>
<field name="reference" writable="1">
<doc xml:space="preserve">identifier for the timestamp reference.</doc>
<type name="Caps" c:type="GstCaps*"/>
</field>
<field name="timestamp" writable="1">
<doc xml:space="preserve">timestamp</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="duration" writable="1">
<doc xml:space="preserve">duration, or %GST_CLOCK_TIME_NONE</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<function name="get_info" c:identifier="gst_reference_timestamp_meta_get_info" version="1.14">
<doc xml:space="preserve">Get the global #GstMetaInfo describing the #GstReferenceTimestampMeta meta.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
</record>
<class name="Registry" c:symbol-prefix="registry" c:type="GstRegistry" parent="Object" glib:type-name="GstRegistry" glib:get-type="gst_registry_get_type" glib:type-struct="RegistryClass">
<doc xml:space="preserve">One registry holds the metadata of a set of plugins.
&lt;emphasis role="bold"&gt;Design:&lt;/emphasis&gt;
The #GstRegistry object is a list of plugins and some functions for dealing
with them. Each #GstPlugin is matched 1-1 with a file on disk, and may or may
not be loaded at a given time.
The primary source, at all times, of plugin information is each plugin file
itself. Thus, if an application wants information about a particular plugin,
or wants to search for a feature that satisfies given criteria, the primary
means of doing so is to load every plugin and look at the resulting
information that is gathered in the default registry. Clearly, this is a time
consuming process, so we cache information in the registry file. The format
and location of the cache file is internal to gstreamer.
On startup, plugins are searched for in the plugin search path. The following
locations are checked in this order:
* location from --gst-plugin-path commandline option.
* the GST_PLUGIN_PATH environment variable.
* the GST_PLUGIN_SYSTEM_PATH environment variable.
* default locations (if GST_PLUGIN_SYSTEM_PATH is not set).
Those default locations are:
`$XDG_DATA_HOME/gstreamer-$GST_API_VERSION/plugins/`
and `$prefix/libs/gstreamer-$GST_API_VERSION/`.
[$XDG_DATA_HOME](http://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html) defaults to
`$HOME/.local/share`.
The registry cache file is loaded from
`$XDG_CACHE_HOME/gstreamer-$GST_API_VERSION/registry-$ARCH.bin`
(where $XDG_CACHE_HOME defaults to `$HOME/.cache`) or the file listed in the `GST_REGISTRY`
env var. One reason to change the registry location is for testing.
For each plugin that is found in the plugin search path, there could be 3
possibilities for cached information:
* the cache may not contain information about a given file.
* the cache may have stale information.
* the cache may have current information.
In the first two cases, the plugin is loaded and the cache updated. In
addition to these cases, the cache may have entries for plugins that are not
relevant to the current process. These are marked as not available to the
current process. If the cache is updated for whatever reason, it is marked
dirty.
A dirty cache is written out at the end of initialization. Each entry is
checked to make sure the information is minimally valid. If not, the entry is
simply dropped.
## Implementation notes:
The "cache" and "registry" are different concepts and can represent
different sets of plugins. For various reasons, at init time, the cache is
stored in the default registry, and plugins not relevant to the current
process are marked with the %GST_PLUGIN_FLAG_CACHED bit. These plugins are
removed at the end of initialization.</doc>
<function name="fork_is_enabled" c:identifier="gst_registry_fork_is_enabled">
<doc xml:space="preserve">By default GStreamer will perform scanning and rebuilding of the
registry file using a helper child process.
Applications might want to disable this behaviour with the
gst_registry_fork_set_enabled() function, in which case new plugins
are scanned (and loaded) into the application process.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if GStreamer will use the child helper process when
rebuilding the registry.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="fork_set_enabled" c:identifier="gst_registry_fork_set_enabled">
<doc xml:space="preserve">Applications might want to disable/enable spawning of a child helper process
when rebuilding the registry. See gst_registry_fork_is_enabled() for more
information.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="enabled" transfer-ownership="none">
<doc xml:space="preserve">whether rebuilding the registry can use a temporary child helper process.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="get" c:identifier="gst_registry_get">
<doc xml:space="preserve">Retrieves the singleton plugin registry. The caller does not own a
reference on the registry, as it is alive as long as GStreamer is
initialized.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstRegistry.</doc>
<type name="Registry" c:type="GstRegistry*"/>
</return-value>
</function>
<method name="add_feature" c:identifier="gst_registry_add_feature">
<doc xml:space="preserve">Add the feature to the registry. The feature-added signal will be emitted.
@feature's reference count will be incremented, and any floating
reference will be removed (see gst_object_ref_sink())</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to add the plugin to</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">the feature to add</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</parameter>
</parameters>
</method>
<method name="add_plugin" c:identifier="gst_registry_add_plugin">
<doc xml:space="preserve">Add the plugin to the registry. The plugin-added signal will be emitted.
@plugin's reference count will be incremented, and any floating
reference will be removed (see gst_object_ref_sink())</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to add the plugin to</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">the plugin to add</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
</parameters>
</method>
<method name="check_feature_version" c:identifier="gst_registry_check_feature_version">
<doc xml:space="preserve">Checks whether a plugin feature by the given name exists in
@registry and whether its version is at least the
version required.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the feature could be found and the version is
the same as the required version or newer, and %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">a #GstRegistry</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="feature_name" transfer-ownership="none">
<doc xml:space="preserve">the name of the feature (e.g. "oggdemux")</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="min_major" transfer-ownership="none">
<doc xml:space="preserve">the minimum major version number</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_minor" transfer-ownership="none">
<doc xml:space="preserve">the minimum minor version number</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="min_micro" transfer-ownership="none">
<doc xml:space="preserve">the minimum micro version number</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="feature_filter" c:identifier="gst_registry_feature_filter">
<doc xml:space="preserve">Runs a filter against all features of the plugins in the registry
and returns a GList with the results.
If the first flag is set, only the first match is
returned (as a list with a single object).</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstPluginFeature. Use gst_plugin_feature_list_free() after usage.
MT safe.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">registry to query</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="filter" transfer-ownership="none" scope="call" closure="2">
<doc xml:space="preserve">the filter to use</doc>
<type name="PluginFeatureFilter" c:type="GstPluginFeatureFilter"/>
</parameter>
<parameter name="first" transfer-ownership="none">
<doc xml:space="preserve">only return first match</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the filter function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="find_feature" c:identifier="gst_registry_find_feature">
<doc xml:space="preserve">Find the pluginfeature with the given name and type in the registry.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the pluginfeature with the
given name and type or %NULL if the plugin was not
found. gst_object_unref() after usage.
MT safe.</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to search</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the pluginfeature name to find</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the pluginfeature type to find</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="find_plugin" c:identifier="gst_registry_find_plugin">
<doc xml:space="preserve">Find the plugin with the given name in the registry.
The plugin will be reffed; caller is responsible for unreffing.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the plugin with the given name
or %NULL if the plugin was not found. gst_object_unref() after
usage.
MT safe.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to search</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the plugin name to find</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_feature_list" c:identifier="gst_registry_get_feature_list">
<doc xml:space="preserve">Retrieves a #GList of #GstPluginFeature of @type.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstPluginFeature of @type. Use gst_plugin_feature_list_free() after use
MT safe.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">a #GstRegistry</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GType.</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="get_feature_list_by_plugin" c:identifier="gst_registry_get_feature_list_by_plugin">
<doc xml:space="preserve">Retrieves a #GList of features of the plugin with name @name.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of
#GstPluginFeature. Use gst_plugin_feature_list_free() after usage.</doc>
<type name="GLib.List" c:type="GList*">
<type name="PluginFeature"/>
</type>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">a #GstRegistry.</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a plugin name.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_feature_list_cookie" c:identifier="gst_registry_get_feature_list_cookie">
<doc xml:space="preserve">Returns the registry's feature list cookie. This changes
every time a feature is added or removed from the registry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the feature list cookie.</doc>
<type name="guint32" c:type="guint32"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_plugin_list" c:identifier="gst_registry_get_plugin_list">
<doc xml:space="preserve">Get a copy of all plugins registered in the given registry. The refcount
of each element in the list in incremented.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of #GstPlugin.
Use gst_plugin_list_free() after usage.
MT safe.</doc>
<type name="GLib.List" c:type="GList*">
<type name="Plugin"/>
</type>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to search</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
</parameters>
</method>
<method name="lookup" c:identifier="gst_registry_lookup">
<doc xml:space="preserve">Look up a plugin in the given registry with the given filename.
If found, plugin is reffed.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the #GstPlugin if found, or
%NULL if not. gst_object_unref() after usage.</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to look up in</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="filename" transfer-ownership="none">
<doc xml:space="preserve">the name of the file to look up</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
</parameters>
</method>
<method name="lookup_feature" c:identifier="gst_registry_lookup_feature">
<doc xml:space="preserve">Find a #GstPluginFeature with @name in @registry.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a #GstPluginFeature with its refcount incremented,
use gst_object_unref() after usage.
MT safe.</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">a #GstRegistry</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">a #GstPluginFeature name</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
</parameters>
</method>
<method name="plugin_filter" c:identifier="gst_registry_plugin_filter">
<doc xml:space="preserve">Runs a filter against all plugins in the registry and returns a #GList with
the results. If the first flag is set, only the first match is
returned (as a list with a single object).
Every plugin is reffed; use gst_plugin_list_free() after use, which
will unref again.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a #GList of #GstPlugin.
Use gst_plugin_list_free() after usage.
MT safe.</doc>
<type name="GLib.List" c:type="GList*">
<type name="Plugin"/>
</type>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">registry to query</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="filter" transfer-ownership="none" scope="call" closure="2">
<doc xml:space="preserve">the filter to use</doc>
<type name="PluginFilter" c:type="GstPluginFilter"/>
</parameter>
<parameter name="first" transfer-ownership="none">
<doc xml:space="preserve">only return first match</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to the filter function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="remove_feature" c:identifier="gst_registry_remove_feature">
<doc xml:space="preserve">Remove the feature from the registry.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to remove the feature from</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">the feature to remove</doc>
<type name="PluginFeature" c:type="GstPluginFeature*"/>
</parameter>
</parameters>
</method>
<method name="remove_plugin" c:identifier="gst_registry_remove_plugin">
<doc xml:space="preserve">Remove the plugin from the registry.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to remove the plugin from</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">the plugin to remove</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
</parameters>
</method>
<method name="scan_path" c:identifier="gst_registry_scan_path">
<doc xml:space="preserve">Scan the given path for plugins to add to the registry. The syntax of the
path is specific to the registry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if registry changed</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="registry" transfer-ownership="none">
<doc xml:space="preserve">the registry to add found plugins to</doc>
<type name="Registry" c:type="GstRegistry*"/>
</instance-parameter>
<parameter name="path" transfer-ownership="none">
<doc xml:space="preserve">the path to scan</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="RegistryPrivate" c:type="GstRegistryPrivate*"/>
</field>
<glib:signal name="feature-added" when="last">
<doc xml:space="preserve">Signals that a feature has been added to the registry (possibly
replacing a previously-added one by the same name)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="feature" transfer-ownership="none">
<doc xml:space="preserve">the feature that has been added</doc>
<type name="PluginFeature"/>
</parameter>
</parameters>
</glib:signal>
<glib:signal name="plugin-added" when="last">
<doc xml:space="preserve">Signals that a plugin has been added to the registry (possibly
replacing a previously-added one by the same name)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">the plugin that has been added</doc>
<type name="Plugin"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="RegistryClass" c:type="GstRegistryClass" glib:is-gtype-struct-for="Registry">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
</record>
<record name="RegistryPrivate" c:type="GstRegistryPrivate" disguised="1"/>
<enumeration name="ResourceError" glib:type-name="GstResourceError" glib:get-type="gst_resource_error_get_type" c:type="GstResourceError" glib:error-domain="gst-resource-error-quark">
<doc xml:space="preserve">Resource errors are for any resource used by an element:
memory, files, network connections, process space, ...
They're typically used by source and sink elements.</doc>
<member name="failed" value="1" c:identifier="GST_RESOURCE_ERROR_FAILED" glib:nick="failed">
<doc xml:space="preserve">a general error which doesn't fit in any other
category. Make sure you add a custom message to the error call.</doc>
</member>
<member name="too_lazy" value="2" c:identifier="GST_RESOURCE_ERROR_TOO_LAZY" glib:nick="too-lazy">
<doc xml:space="preserve">do not use this except as a placeholder for
deciding where to go while developing code.</doc>
</member>
<member name="not_found" value="3" c:identifier="GST_RESOURCE_ERROR_NOT_FOUND" glib:nick="not-found">
<doc xml:space="preserve">used when the resource could not be found.</doc>
</member>
<member name="busy" value="4" c:identifier="GST_RESOURCE_ERROR_BUSY" glib:nick="busy">
<doc xml:space="preserve">used when resource is busy.</doc>
</member>
<member name="open_read" value="5" c:identifier="GST_RESOURCE_ERROR_OPEN_READ" glib:nick="open-read">
<doc xml:space="preserve">used when resource fails to open for reading.</doc>
</member>
<member name="open_write" value="6" c:identifier="GST_RESOURCE_ERROR_OPEN_WRITE" glib:nick="open-write">
<doc xml:space="preserve">used when resource fails to open for writing.</doc>
</member>
<member name="open_read_write" value="7" c:identifier="GST_RESOURCE_ERROR_OPEN_READ_WRITE" glib:nick="open-read-write">
<doc xml:space="preserve">used when resource cannot be opened for
both reading and writing, or either (but unspecified which).</doc>
</member>
<member name="close" value="8" c:identifier="GST_RESOURCE_ERROR_CLOSE" glib:nick="close">
<doc xml:space="preserve">used when the resource can't be closed.</doc>
</member>
<member name="read" value="9" c:identifier="GST_RESOURCE_ERROR_READ" glib:nick="read">
<doc xml:space="preserve">used when the resource can't be read from.</doc>
</member>
<member name="write" value="10" c:identifier="GST_RESOURCE_ERROR_WRITE" glib:nick="write">
<doc xml:space="preserve">used when the resource can't be written to.</doc>
</member>
<member name="seek" value="11" c:identifier="GST_RESOURCE_ERROR_SEEK" glib:nick="seek">
<doc xml:space="preserve">used when a seek on the resource fails.</doc>
</member>
<member name="sync" value="12" c:identifier="GST_RESOURCE_ERROR_SYNC" glib:nick="sync">
<doc xml:space="preserve">used when a synchronize on the resource fails.</doc>
</member>
<member name="settings" value="13" c:identifier="GST_RESOURCE_ERROR_SETTINGS" glib:nick="settings">
<doc xml:space="preserve">used when settings can't be manipulated on.</doc>
</member>
<member name="no_space_left" value="14" c:identifier="GST_RESOURCE_ERROR_NO_SPACE_LEFT" glib:nick="no-space-left">
<doc xml:space="preserve">used when the resource has no space left.</doc>
</member>
<member name="not_authorized" value="15" c:identifier="GST_RESOURCE_ERROR_NOT_AUTHORIZED" glib:nick="not-authorized">
<doc xml:space="preserve">used when the resource can't be opened
due to missing authorization.
(Since: 1.2.4)</doc>
</member>
<member name="num_errors" value="16" c:identifier="GST_RESOURCE_ERROR_NUM_ERRORS" glib:nick="num-errors">
<doc xml:space="preserve">the number of resource error types.</doc>
</member>
<function name="quark" c:identifier="gst_resource_error_quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<function-macro name="SAMPLE" c:identifier="GST_SAMPLE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="SAMPLE_CAST" c:identifier="GST_SAMPLE_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="SECOND" value="1000000000" c:type="GST_SECOND">
<doc xml:space="preserve">Constant that defines one GStreamer second.</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</constant>
<constant name="SEGMENT_FORMAT" value="paB" c:type="GST_SEGMENT_FORMAT" introspectable="0">
<doc xml:space="preserve">printf format type used to debug GStreamer segments. You can use this in
combination with GStreamer's debug logging system as well as the functions
gst_info_vasprintf(), gst_info_strdup_vprintf() and gst_info_strdup_printf()
to pretty-print #GstSegment structures.
This can only be used on pointers to GstSegment structures.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="SEGMENT_INSTANT_FLAGS" value="912" c:type="GST_SEGMENT_INSTANT_FLAGS">
<type name="gint" c:type="gint"/>
</constant>
<constant name="SEQNUM_INVALID" value="0" c:type="GST_SEQNUM_INVALID" version="1.14">
<doc xml:space="preserve">A value which is guaranteed to never be returned by
gst_util_seqnum_next().
Can be used as a default value in variables used to store seqnum.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="STATE" c:identifier="GST_STATE" introspectable="0">
<doc xml:space="preserve">This macro returns the current #GstState of the element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return state for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_BROADCAST" c:identifier="GST_STATE_BROADCAST" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_GET_COND" c:identifier="GST_STATE_GET_COND" introspectable="0">
<doc xml:space="preserve">Get the conditional used to signal the completion of a state change.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_GET_LOCK" c:identifier="GST_STATE_GET_LOCK" introspectable="0">
<doc xml:space="preserve">Get a reference to the state lock of @elem.
This lock is used by the core. It is taken while getting or setting
the state, during state changes, and while finalizing.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_GET_NEXT" c:identifier="GST_STATE_GET_NEXT" introspectable="0">
<doc xml:space="preserve">Given a current state @cur and a target state @pending, calculate the next (intermediate)
#GstState.</doc>
<parameters>
<parameter name="cur">
<doc xml:space="preserve">A starting #GstState</doc>
</parameter>
<parameter name="pending">
<doc xml:space="preserve">A target #GstState</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_LOCK" c:identifier="GST_STATE_LOCK" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_NEXT" c:identifier="GST_STATE_NEXT" introspectable="0">
<doc xml:space="preserve">This macro returns the next #GstState of the element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return the next state for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_PENDING" c:identifier="GST_STATE_PENDING" introspectable="0">
<doc xml:space="preserve">This macro returns the currently pending #GstState of the element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return the pending state for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_RETURN" c:identifier="GST_STATE_RETURN" introspectable="0">
<doc xml:space="preserve">This macro returns the last #GstStateChangeReturn value.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return the last state result for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_SIGNAL" c:identifier="GST_STATE_SIGNAL" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_TARGET" c:identifier="GST_STATE_TARGET" introspectable="0">
<doc xml:space="preserve">This macro returns the target #GstState of the element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to return the target state for.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_TRANSITION" c:identifier="GST_STATE_TRANSITION" introspectable="0">
<doc xml:space="preserve">Given a current state @cur and a next state @next, calculate the associated
#GstStateChange transition.</doc>
<parameters>
<parameter name="cur">
<doc xml:space="preserve">A current state</doc>
</parameter>
<parameter name="next">
<doc xml:space="preserve">A next state</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_TRANSITION_CURRENT" c:identifier="GST_STATE_TRANSITION_CURRENT" introspectable="0">
<doc xml:space="preserve">Given a state transition @trans, extract the current #GstState.</doc>
<parameters>
<parameter name="trans">
<doc xml:space="preserve">A #GstStateChange</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_TRANSITION_NEXT" c:identifier="GST_STATE_TRANSITION_NEXT" introspectable="0">
<doc xml:space="preserve">Given a state transition @trans, extract the next #GstState.</doc>
<parameters>
<parameter name="trans">
<doc xml:space="preserve">A #GstStateChange</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_TRYLOCK" c:identifier="GST_STATE_TRYLOCK" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_UNLOCK" c:identifier="GST_STATE_UNLOCK" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_WAIT" c:identifier="GST_STATE_WAIT" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATE_WAIT_UNTIL" c:identifier="GST_STATE_WAIT_UNTIL" introspectable="0">
<parameters>
<parameter name="elem">
</parameter>
<parameter name="end_time">
</parameter>
</parameters>
</function-macro>
<function-macro name="STATIC_CAPS" c:identifier="GST_STATIC_CAPS" introspectable="0">
<doc xml:space="preserve">Creates a new #GstCaps static caps from an input string.
This can be used in pad templates.</doc>
<parameters>
<parameter name="string">
<doc xml:space="preserve">the string describing the caps</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STATIC_PAD_TEMPLATE" c:identifier="GST_STATIC_PAD_TEMPLATE" introspectable="0">
<doc xml:space="preserve">Convenience macro to fill the values of a #GstStaticPadTemplate
structure.
Example:
|[&lt;!-- language="C" --&gt;
static GstStaticPadTemplate my_src_template = * GST_STATIC_PAD_TEMPLATE("src", GST_PAD_SRC, GST_PAD_ALWAYS,
,
GST_STATIC_CAPS_ANY);
]|</doc>
<parameters>
<parameter name="padname">
<doc xml:space="preserve">the name template of the pad</doc>
</parameter>
<parameter name="dir">
<doc xml:space="preserve">the GstPadDirection of the pad</doc>
</parameter>
<parameter name="pres">
<doc xml:space="preserve">the GstPadPresence of the pad</doc>
</parameter>
<parameter name="caps">
<doc xml:space="preserve">the GstStaticCaps of the pad</doc>
</parameter>
</parameters>
</function-macro>
<constant name="STIMEP_FORMAT" value="paS" c:type="GST_STIMEP_FORMAT" version="1.18" introspectable="0">
<doc xml:space="preserve">printf format type used to debug GStreamer signed time value pointers. You
can use this in combination with GStreamer's debug logging system as well as
the functions gst_info_vasprintf(), gst_info_strdup_vprintf() and
gst_info_strdup_printf() to pretty-print signed time (pointers to
#GstClockTimeDiff or #gint64).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="STIME_ARGS" c:identifier="GST_STIME_ARGS" version="1.6" introspectable="0">
<doc xml:space="preserve">Format @t for the #GST_STIME_FORMAT format string. Note: @t will be
evaluated more than once.</doc>
<parameters>
<parameter name="t">
<doc xml:space="preserve">a #GstClockTimeDiff or #gint64</doc>
</parameter>
</parameters>
</function-macro>
<constant name="STIME_FORMAT" value="c%" c:type="GST_STIME_FORMAT" version="1.6" introspectable="0">
<doc xml:space="preserve">A string that can be used in printf-like format strings to display a signed
#GstClockTimeDiff or #gint64 value in h:m:s format. Use GST_TIME_ARGS() to
construct the matching arguments.
Example:
|[
printf("%" GST_STIME_FORMAT "\n", GST_STIME_ARGS(ts));
]|</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="STREAM" c:identifier="GST_STREAM" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_CAST" c:identifier="GST_STREAM_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_CLASS" c:identifier="GST_STREAM_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_COLLECTION" c:identifier="GST_STREAM_COLLECTION" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_COLLECTION_CAST" c:identifier="GST_STREAM_COLLECTION_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_COLLECTION_CLASS" c:identifier="GST_STREAM_COLLECTION_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_COLLECTION_GET_CLASS" c:identifier="GST_STREAM_COLLECTION_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STREAM_GET_CLASS" c:identifier="GST_STREAM_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="STRUCTURE" c:identifier="GST_STRUCTURE" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<function-macro name="STRUCTURE_CAST" c:identifier="GST_STRUCTURE_CAST" introspectable="0">
<parameters>
<parameter name="object">
</parameter>
</parameters>
</function-macro>
<function-macro name="STR_FOURCC" c:identifier="GST_STR_FOURCC" introspectable="0">
<doc xml:space="preserve">Transform an input string into a #guint32 fourcc value with host
endianness.
Caller is responsible for ensuring the input string consists of at least
four characters.
|[
guint32 fourcc = GST_STR_FOURCC ("MJPG");
]|</doc>
<parameters>
<parameter name="f">
<doc xml:space="preserve">a string with at least four characters</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="STR_NULL" c:identifier="GST_STR_NULL" introspectable="0">
<doc xml:space="preserve">Macro to use when a string must not be %NULL, but may be %NULL. If the string
is %NULL, "(NULL)" is printed instead.
In GStreamer printf string arguments may not be %NULL, because on some
platforms (ie Solaris) the libc crashes in that case. This includes debugging
strings.</doc>
<parameters>
<parameter name="str">
<doc xml:space="preserve">The string to check.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="SYSTEM_CLOCK" c:identifier="GST_SYSTEM_CLOCK" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="SYSTEM_CLOCK_CAST" c:identifier="GST_SYSTEM_CLOCK_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="SYSTEM_CLOCK_CLASS" c:identifier="GST_SYSTEM_CLOCK_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="SYSTEM_CLOCK_GET_CLASS" c:identifier="GST_SYSTEM_CLOCK_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<record name="Sample" c:type="GstSample" glib:type-name="GstSample" glib:get-type="gst_sample_get_type" c:symbol-prefix="sample">
<doc xml:space="preserve">A #GstSample is a small object containing data, a type, timing and
extra arbitrary information.</doc>
<constructor name="new" c:identifier="gst_sample_new">
<doc xml:space="preserve">Create a new #GstSample with the provided details.
Free-function: gst_sample_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstSample. gst_sample_unref()
after usage.</doc>
<type name="Sample" c:type="GstSample*"/>
</return-value>
<parameters>
<parameter name="buffer" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstBuffer, or %NULL</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstCaps, or %NULL</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="segment" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstSegment, or %NULL</doc>
<type name="Segment" c:type="const GstSegment*"/>
</parameter>
<parameter name="info" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstStructure, or %NULL</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</constructor>
<method name="copy" c:identifier="gst_sample_copy" version="1.2" introspectable="0">
<doc xml:space="preserve">Create a copy of the given sample. This will also make a newly allocated
copy of the data the source sample contains.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new copy of @buf.</doc>
<type name="Sample" c:type="GstSample*"/>
</return-value>
<parameters>
<instance-parameter name="buf" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample.</doc>
<type name="Sample" c:type="const GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_buffer" c:identifier="gst_sample_get_buffer">
<doc xml:space="preserve">Get the buffer associated with @sample</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the buffer of @sample or %NULL
when there is no buffer. The buffer remains valid as long as
@sample is valid. If you need to hold on to it for longer than
that, take a ref to the buffer with gst_buffer_ref().</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_buffer_list" c:identifier="gst_sample_get_buffer_list" version="1.6">
<doc xml:space="preserve">Get the buffer list associated with @sample</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the buffer list of @sample or %NULL
when there is no buffer list. The buffer list remains valid as long as
@sample is valid. If you need to hold on to it for longer than
that, take a ref to the buffer list with gst_mini_object_ref ().</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_caps" c:identifier="gst_sample_get_caps">
<doc xml:space="preserve">Get the caps associated with @sample</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the caps of @sample or %NULL
when there is no caps. The caps remain valid as long as @sample is
valid. If you need to hold on to the caps for longer than that,
take a ref to the caps with gst_caps_ref().</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_info" c:identifier="gst_sample_get_info">
<doc xml:space="preserve">Get extra information associated with @sample.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the extra info of @sample.
The info remains valid as long as @sample is valid.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_segment" c:identifier="gst_sample_get_segment">
<doc xml:space="preserve">Get the segment associated with @sample</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the segment of @sample.
The segment remains valid as long as @sample is valid.</doc>
<type name="Segment" c:type="GstSegment*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_sample_ref" introspectable="0">
<doc xml:space="preserve">Increases the refcount of the given sample by one.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">@sample</doc>
<type name="Sample" c:type="GstSample*"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_buffer" c:identifier="gst_sample_set_buffer" version="1.16">
<doc xml:space="preserve">Set the buffer associated with @sample. @sample must be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">A #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
<parameter name="buffer" transfer-ownership="none">
<doc xml:space="preserve">A #GstBuffer</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</method>
<method name="set_buffer_list" c:identifier="gst_sample_set_buffer_list" version="1.6">
<doc xml:space="preserve">Set the buffer list associated with @sample. @sample must be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
<parameter name="buffer_list" transfer-ownership="none">
<doc xml:space="preserve">a #GstBufferList</doc>
<type name="BufferList" c:type="GstBufferList*"/>
</parameter>
</parameters>
</method>
<method name="set_caps" c:identifier="gst_sample_set_caps" version="1.16">
<doc xml:space="preserve">Set the caps associated with @sample. @sample must be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">A #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">A #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="set_info" c:identifier="gst_sample_set_info" version="1.16">
<doc xml:space="preserve">Set the info structure associated with @sample. @sample must be writable,
and @info must not have a parent set already.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">A #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
<parameter name="info" transfer-ownership="full">
<doc xml:space="preserve">A #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="set_segment" c:identifier="gst_sample_set_segment" version="1.16">
<doc xml:space="preserve">Set the segment associated with @sample. @sample must be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="none">
<doc xml:space="preserve">A #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
<parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">A #GstSegment</doc>
<type name="Segment" c:type="const GstSegment*"/>
</parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_sample_unref" introspectable="0">
<doc xml:space="preserve">Decreases the refcount of the sample. If the refcount reaches 0, the
sample will be freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="sample" transfer-ownership="full">
<doc xml:space="preserve">a #GstSample</doc>
<type name="Sample" c:type="GstSample*"/>
</instance-parameter>
</parameters>
</method>
</record>
<bitfield name="SchedulingFlags" glib:type-name="GstSchedulingFlags" glib:get-type="gst_scheduling_flags_get_type" c:type="GstSchedulingFlags">
<doc xml:space="preserve">The different scheduling flags.</doc>
<member name="seekable" value="1" c:identifier="GST_SCHEDULING_FLAG_SEEKABLE" glib:nick="seekable">
<doc xml:space="preserve">if seeking is possible</doc>
</member>
<member name="sequential" value="2" c:identifier="GST_SCHEDULING_FLAG_SEQUENTIAL" glib:nick="sequential">
<doc xml:space="preserve">if sequential access is recommended</doc>
</member>
<member name="bandwidth_limited" value="4" c:identifier="GST_SCHEDULING_FLAG_BANDWIDTH_LIMITED" glib:nick="bandwidth-limited">
<doc xml:space="preserve">if bandwidth is limited and buffering possible (since 1.2)</doc>
</member>
</bitfield>
<enumeration name="SearchMode" glib:type-name="GstSearchMode" glib:get-type="gst_search_mode_get_type" c:type="GstSearchMode">
<doc xml:space="preserve">The different search modes.</doc>
<member name="exact" value="0" c:identifier="GST_SEARCH_MODE_EXACT" glib:nick="exact">
<doc xml:space="preserve">Only search for exact matches.</doc>
</member>
<member name="before" value="1" c:identifier="GST_SEARCH_MODE_BEFORE" glib:nick="before">
<doc xml:space="preserve">Search for an exact match or the element just before.</doc>
</member>
<member name="after" value="2" c:identifier="GST_SEARCH_MODE_AFTER" glib:nick="after">
<doc xml:space="preserve">Search for an exact match or the element just after.</doc>
</member>
</enumeration>
<bitfield name="SeekFlags" glib:type-name="GstSeekFlags" glib:get-type="gst_seek_flags_get_type" c:type="GstSeekFlags">
<doc xml:space="preserve">Flags to be used with gst_element_seek() or gst_event_new_seek(). All flags
can be used together.
A non flushing seek might take some time to perform as the currently
playing data in the pipeline will not be cleared.
An accurate seek might be slower for formats that don't have any indexes
or timestamp markers in the stream. Specifying this flag might require a
complete scan of the file in those cases.
When performing a segment seek: after the playback of the segment completes,
no EOS will be emitted by the element that performed the seek, but a
%GST_MESSAGE_SEGMENT_DONE message will be posted on the bus by the element.
When this message is posted, it is possible to send a new seek event to
continue playback. With this seek method it is possible to perform seamless
looping or simple linear editing.
When only changing the playback rate and not the direction, the
%GST_SEEK_FLAG_INSTANT_RATE_CHANGE flag can be used for a non-flushing seek
to signal that the rate change should be applied immediately. This requires
special support in the seek handlers (e.g. demuxers) and any elements
synchronizing to the clock, and in general can't work in all cases (for example
UDP streaming where the delivery rate is controlled by a remote server). The
instant-rate-change mode supports changing the trickmode-related GST_SEEK_ flags,
but can't be used in conjunction with other seek flags that affect the new
playback position - as the playback position will not be changing.
When doing fast forward (rate &gt; 1.0) or fast reverse (rate &lt; -1.0) trickmode
playback, the %GST_SEEK_FLAG_TRICKMODE flag can be used to instruct decoders
and demuxers to adjust the playback rate by skipping frames. This can improve
performance and decrease CPU usage because not all frames need to be decoded.
Beyond that, the %GST_SEEK_FLAG_TRICKMODE_KEY_UNITS flag can be used to
request that decoders skip all frames except key units, and
%GST_SEEK_FLAG_TRICKMODE_NO_AUDIO flags can be used to request that audio
decoders do no decoding at all, and simple output silence.
The %GST_SEEK_FLAG_SNAP_BEFORE flag can be used to snap to the previous
relevant location, and the %GST_SEEK_FLAG_SNAP_AFTER flag can be used to
select the next relevant location. If %GST_SEEK_FLAG_KEY_UNIT is specified,
the relevant location is a keyframe. If both flags are specified, the nearest
of these locations will be selected. If none are specified, the implementation is
free to select whichever it wants.
The before and after here are in running time, so when playing backwards,
the next location refers to the one that will played in next, and not the
one that is located after in the actual source stream.
Also see part-seeking.txt in the GStreamer design documentation for more
details on the meaning of these flags and the behaviour expected of
elements that handle them.</doc>
<member name="none" value="0" c:identifier="GST_SEEK_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">no flag</doc>
</member>
<member name="flush" value="1" c:identifier="GST_SEEK_FLAG_FLUSH" glib:nick="flush">
<doc xml:space="preserve">flush pipeline</doc>
</member>
<member name="accurate" value="2" c:identifier="GST_SEEK_FLAG_ACCURATE" glib:nick="accurate">
<doc xml:space="preserve">accurate position is requested, this might
be considerably slower for some formats.</doc>
</member>
<member name="key_unit" value="4" c:identifier="GST_SEEK_FLAG_KEY_UNIT" glib:nick="key-unit">
<doc xml:space="preserve">seek to the nearest keyframe. This might be
faster but less accurate.</doc>
</member>
<member name="segment" value="8" c:identifier="GST_SEEK_FLAG_SEGMENT" glib:nick="segment">
<doc xml:space="preserve">perform a segment seek.</doc>
</member>
<member name="trickmode" value="16" c:identifier="GST_SEEK_FLAG_TRICKMODE" glib:nick="trickmode">
<doc xml:space="preserve">when doing fast forward or fast reverse playback, allow
elements to skip frames instead of generating all
frames. (Since: 1.6)</doc>
</member>
<member name="skip" value="16" c:identifier="GST_SEEK_FLAG_SKIP" glib:nick="skip">
<doc xml:space="preserve">Deprecated backward compatibility flag, replaced
by %GST_SEEK_FLAG_TRICKMODE</doc>
</member>
<member name="snap_before" value="32" c:identifier="GST_SEEK_FLAG_SNAP_BEFORE" glib:nick="snap-before">
<doc xml:space="preserve">go to a location before the requested position,
if %GST_SEEK_FLAG_KEY_UNIT this means the keyframe at or before
the requested position the one at or before the seek target.</doc>
</member>
<member name="snap_after" value="64" c:identifier="GST_SEEK_FLAG_SNAP_AFTER" glib:nick="snap-after">
<doc xml:space="preserve">go to a location after the requested position,
if %GST_SEEK_FLAG_KEY_UNIT this means the keyframe at of after the
requested position.</doc>
</member>
<member name="snap_nearest" value="96" c:identifier="GST_SEEK_FLAG_SNAP_NEAREST" glib:nick="snap-nearest">
<doc xml:space="preserve">go to a position near the requested position,
if %GST_SEEK_FLAG_KEY_UNIT this means the keyframe closest
to the requested position, if both keyframes are at an equal
distance, behaves like %GST_SEEK_FLAG_SNAP_BEFORE.</doc>
</member>
<member name="trickmode_key_units" value="128" c:identifier="GST_SEEK_FLAG_TRICKMODE_KEY_UNITS" glib:nick="trickmode-key-units">
<doc xml:space="preserve">when doing fast forward or fast reverse
playback, request that elements only decode keyframes
and skip all other content, for formats that have
keyframes. (Since: 1.6)</doc>
</member>
<member name="trickmode_no_audio" value="256" c:identifier="GST_SEEK_FLAG_TRICKMODE_NO_AUDIO" glib:nick="trickmode-no-audio">
<doc xml:space="preserve">when doing fast forward or fast reverse
playback, request that audio decoder elements skip
decoding and output only gap events or silence. (Since: 1.6)</doc>
</member>
<member name="trickmode_forward_predicted" value="512" c:identifier="GST_SEEK_FLAG_TRICKMODE_FORWARD_PREDICTED" glib:nick="trickmode-forward-predicted">
<doc xml:space="preserve">When doing fast forward or fast reverse
playback, request that elements only decode keyframes and
forward predicted frames and skip all other content (for example
B-Frames), for formats that have keyframes and forward predicted
frames. (Since: 1.18)</doc>
</member>
<member name="instant_rate_change" value="1024" c:identifier="GST_SEEK_FLAG_INSTANT_RATE_CHANGE" glib:nick="instant-rate-change">
<doc xml:space="preserve">Signals that a rate change should be
applied immediately. Only valid if start/stop position
are GST_CLOCK_TIME_NONE, the playback direction does not change
and the seek is not flushing. (Since: 1.18)</doc>
</member>
</bitfield>
<enumeration name="SeekType" glib:type-name="GstSeekType" glib:get-type="gst_seek_type_get_type" c:type="GstSeekType">
<doc xml:space="preserve">The different types of seek events. When constructing a seek event with
gst_event_new_seek() or when doing gst_segment_do_seek ().</doc>
<member name="none" value="0" c:identifier="GST_SEEK_TYPE_NONE" glib:nick="none">
<doc xml:space="preserve">no change in position is required</doc>
</member>
<member name="set" value="1" c:identifier="GST_SEEK_TYPE_SET" glib:nick="set">
<doc xml:space="preserve">absolute position is requested</doc>
</member>
<member name="end" value="2" c:identifier="GST_SEEK_TYPE_END" glib:nick="end">
<doc xml:space="preserve">relative position to duration is requested</doc>
</member>
</enumeration>
<record name="Segment" c:type="GstSegment" glib:type-name="GstSegment" glib:get-type="gst_segment_get_type" c:symbol-prefix="segment">
<doc xml:space="preserve">This helper structure holds the relevant values for tracking the region of
interest in a media file, called a segment.
The structure can be used for two purposes:
* performing seeks (handling seek events)
* tracking playback regions (handling newsegment events)
The segment is usually configured by the application with a seek event which
is propagated upstream and eventually handled by an element that performs the seek.
The configured segment is then propagated back downstream with a newsegment event.
This information is then used to clip media to the segment boundaries.
A segment structure is initialized with gst_segment_init(), which takes a #GstFormat
that will be used as the format of the segment values. The segment will be configured
with a start value of 0 and a stop/duration of -1, which is undefined. The default
rate and applied_rate is 1.0.
The public duration field contains the duration of the segment. When using
the segment for seeking, the start and time members should normally be left
to their default 0 value. The stop position is left to -1 unless explicitly
configured to a different value after a seek event.
The current position in the segment should be set by changing the position
member in the structure.
For elements that perform seeks, the current segment should be updated with the
gst_segment_do_seek() and the values from the seek event. This method will update
all the segment fields. The position field will contain the new playback position.
If the start_type was different from GST_SEEK_TYPE_NONE, playback continues from
the position position, possibly with updated flags or rate.
For elements that want to use #GstSegment to track the playback region,
update the segment fields with the information from the newsegment event.
The gst_segment_clip() method can be used to check and clip
the media data to the segment boundaries.
For elements that want to synchronize to the pipeline clock, gst_segment_to_running_time()
can be used to convert a timestamp to a value that can be used to synchronize
to the clock. This function takes into account the base as well as
any rate or applied_rate conversions.
For elements that need to perform operations on media data in stream_time,
gst_segment_to_stream_time() can be used to convert a timestamp and the segment
info to stream time (which is always between 0 and the duration of the stream).</doc>
<field name="flags" writable="1">
<doc xml:space="preserve">flags for this segment</doc>
<type name="SegmentFlags" c:type="GstSegmentFlags"/>
</field>
<field name="rate" writable="1">
<doc xml:space="preserve">the playback rate of the segment is set in response to a seek
event and, without any seek, the value should be `1.0`. This
value is used by elements that synchronize buffer [running
times](additional/design/synchronisation.md#running-time) on
the clock (usually the sink elements), leading to consuming
buffers faster (for a value `&gt; 1.0`) or slower (for `0.0 &lt;
value &lt; 1.0`) than normal playback speed. The rate also
defines the playback direction, meaning that when the value is
lower than `0.0`, the playback happens in reverse, and the
[stream-time](additional/design/synchronisation.md#stream-time)
is going backward. The `rate` value should never be `0.0`.</doc>
<type name="gdouble" c:type="gdouble"/>
</field>
<field name="applied_rate" writable="1">
<doc xml:space="preserve">The applied rate is the rate that has been applied to the stream.
The effective/resulting playback rate of a stream is
`rate * applied_rate`.
The applied rate can be set by source elements when a server is
sending the stream with an already modified playback speed
rate. Filter elements that modify the stream in a way that
modifies the playback speed should also modify the applied
rate. For example the #videorate element when its
#videorate:rate property is set will set the applied rate of
the segment it pushed downstream. Also #scaletempo applies the
input segment rate to the stream and outputs a segment with
rate=1.0 and applied_rate=&lt;inputsegment.rate&gt;.</doc>
<type name="gdouble" c:type="gdouble"/>
</field>
<field name="format" writable="1">
<doc xml:space="preserve">the unit used for all of the segment's values.</doc>
<type name="Format" c:type="GstFormat"/>
</field>
<field name="base" writable="1">
<doc xml:space="preserve">the running time (plus elapsed time, see offset) of the
segment [start](GstSegment.start) ([stop](GstSegment.stop) if
rate &lt; 0.0).</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="offset" writable="1">
<doc xml:space="preserve">the offset expresses the elapsed time (in buffer timestamps)
before a seek with its start (stop if rate &lt; 0.0) seek type
set to #GST_SEEK_TYPE_NONE, the value is set to the position
of the segment at the time of the seek.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="start" writable="1">
<doc xml:space="preserve">the start time of the segment (in buffer timestamps)
[(PTS)](GstBuffer.pts), that is the timestamp of the first
buffer to output inside the segment (last one during
reverse playback). For example decoders will
[clip](gst_segment_clip) out the buffers before the start
time.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="stop" writable="1">
<doc xml:space="preserve">the stop time of the segment (in buffer timestamps)
[(PTS)](GstBuffer.pts), that is the timestamp of the last
buffer to output inside the segment (first one during
reverse playback). For example decoders will
[clip](gst_segment_clip) out buffers after the stop time.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="time" writable="1">
<doc xml:space="preserve">the stream time of the segment [start](GstSegment.start)
([stop](GstSegment.stop) if rate &lt; 0.0).</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="position" writable="1">
<doc xml:space="preserve">the buffer timestamp position in the segment is supposed to be
updated by elements such as sources, demuxers or parsers to
track progress by setting it to the last pushed buffer' end time
([timestamp](GstBuffer.pts) + #GstBuffer.duration) for that
specific segment. The position is used when reconfiguring the
segment with #gst_segment_do_seek when the seek is only
updating the segment (see [offset](GstSegment.offset)).</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="duration" writable="1">
<doc xml:space="preserve">the duration of the segment is the maximum absolute difference
between #GstSegment.start and #GstSegment.stop if stop is not
set, otherwise it should be the difference between those
two values. This should be set by elements that know the
overall stream duration (like demuxers) and will be used when
seeking with #GST_SEEK_TYPE_END.</doc>
<type name="guint64" c:type="guint64"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<constructor name="new" c:identifier="gst_segment_new">
<doc xml:space="preserve">Allocate a new #GstSegment structure and initialize it using
gst_segment_init().
Free-function: gst_segment_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstSegment, free with gst_segment_free().</doc>
<type name="Segment" c:type="GstSegment*"/>
</return-value>
</constructor>
<method name="clip" c:identifier="gst_segment_clip">
<doc xml:space="preserve">Clip the given @start and @stop values to the segment boundaries given
in @segment. @start and @stop are compared and clipped to @segment
start and stop values.
If the function returns %FALSE, @start and @stop are known to fall
outside of @segment and @clip_start and @clip_stop are not updated.
When the function returns %TRUE, @clip_start and @clip_stop will be
updated. If @clip_start or @clip_stop are different from @start or @stop
respectively, the region fell partially in the segment.
Note that when @stop is -1, @clip_stop will be set to the end of the
segment. Depending on the use case, this may or may not be what you want.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the given @start and @stop times fall partially or
completely in @segment, %FALSE if the values are completely outside
of the segment.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">the stop position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="clip_start" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the clipped start position in the segment</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
<parameter name="clip_stop" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the clipped stop position in the segment</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_segment_copy">
<doc xml:space="preserve">Create a copy of given @segment.
Free-function: gst_segment_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstSegment, free with gst_segment_free().</doc>
<type name="Segment" c:type="GstSegment*"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
</parameters>
</method>
<method name="copy_into" c:identifier="gst_segment_copy_into">
<doc xml:space="preserve">Copy the contents of @src into @dest.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment</doc>
<type name="Segment" c:type="GstSegment*"/>
</parameter>
</parameters>
</method>
<method name="do_seek" c:identifier="gst_segment_do_seek">
<doc xml:space="preserve">Update the segment structure with the field values of a seek event (see
gst_event_new_seek()).
After calling this method, the segment field position and time will
contain the requested new position in the segment. The new requested
position in the segment depends on @rate and @start_type and @stop_type.
For positive @rate, the new position in the segment is the new @segment
start field when it was updated with a @start_type different from
#GST_SEEK_TYPE_NONE. If no update was performed on @segment start position
(#GST_SEEK_TYPE_NONE), @start is ignored and @segment position is
unmodified.
For negative @rate, the new position in the segment is the new @segment
stop field when it was updated with a @stop_type different from
#GST_SEEK_TYPE_NONE. If no stop was previously configured in the segment, the
duration of the segment will be used to update the stop position.
If no update was performed on @segment stop position (#GST_SEEK_TYPE_NONE),
@stop is ignored and @segment position is unmodified.
The applied rate of the segment will be set to 1.0 by default.
If the caller can apply a rate change, it should update @segment
rate and applied_rate after calling this function.
@update will be set to %TRUE if a seek should be performed to the segment
position field. This field can be %FALSE if, for example, only the @rate
has been changed but not the playback position.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the seek could be performed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="GstSegment*"/>
</instance-parameter>
<parameter name="rate" transfer-ownership="none">
<doc xml:space="preserve">the rate of the segment.</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the segment flags for the segment</doc>
<type name="SeekFlags" c:type="GstSeekFlags"/>
</parameter>
<parameter name="start_type" transfer-ownership="none">
<doc xml:space="preserve">the seek method</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the seek start value</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="stop_type" transfer-ownership="none">
<doc xml:space="preserve">the seek method</doc>
<type name="SeekType" c:type="GstSeekType"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">the seek stop value</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="update" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">boolean holding whether position was updated.</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_segment_free">
<doc xml:space="preserve">Free the allocated segment @segment.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="full">
<doc xml:space="preserve">a #GstSegment</doc>
<type name="Segment" c:type="GstSegment*"/>
</instance-parameter>
</parameters>
</method>
<method name="init" c:identifier="gst_segment_init">
<doc xml:space="preserve">The start/position fields are set to 0 and the stop/duration
fields are set to -1 (unknown). The default rate of 1.0 and no
flags are set.
Initialize @segment to its default values.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</method>
<method name="is_equal" c:identifier="gst_segment_is_equal" version="1.6">
<doc xml:space="preserve">Checks for two segments being equal. Equality here is defined
as perfect equality, including floating point values.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the segments are equal, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="s0" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="s1" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</parameter>
</parameters>
</method>
<method name="offset_running_time" c:identifier="gst_segment_offset_running_time" version="1.2.3">
<doc xml:space="preserve">Adjust the values in @segment so that @offset is applied to all
future running-time calculations.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the segment could be updated successfully. If %FALSE is
returned, @offset is not in @segment.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">the offset to apply in the segment</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="position_from_running_time" c:identifier="gst_segment_position_from_running_time" version="1.8">
<doc xml:space="preserve">Convert @running_time into a position in the segment so that
gst_segment_to_running_time() with that position returns @running_time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the position in the segment for @running_time. This function returns
-1 when @running_time is -1 or when it is not inside @segment.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the running_time in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="position_from_running_time_full" c:identifier="gst_segment_position_from_running_time_full" version="1.8">
<doc xml:space="preserve">Translate @running_time to the segment position using the currently configured
segment. Compared to gst_segment_position_from_running_time() this function can
return negative segment position.
This function is typically used by elements that need to synchronize buffers
against the clock or each other.
@running_time can be any value and the result of this function for values
outside of the segment is extrapolated.
When 1 is returned, @running_time resulted in a positive position returned
in @position.
When this function returns -1, the returned @position was &lt; 0, and the value
in the position variable should be negated to get the real negative segment
position.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a 1 or -1 on success, 0 on failure.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the running-time</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="position" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the resulting position in the segment</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="position_from_stream_time" c:identifier="gst_segment_position_from_stream_time" version="1.8">
<doc xml:space="preserve">Convert @stream_time into a position in the segment so that
gst_segment_to_stream_time() with that position returns @stream_time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the position in the segment for @stream_time. This function returns
-1 when @stream_time is -1 or when it is not inside @segment.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="stream_time" transfer-ownership="none">
<doc xml:space="preserve">the stream_time in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="position_from_stream_time_full" c:identifier="gst_segment_position_from_stream_time_full" version="1.8">
<doc xml:space="preserve">Translate @stream_time to the segment position using the currently configured
segment. Compared to gst_segment_position_from_stream_time() this function can
return negative segment position.
This function is typically used by elements that need to synchronize buffers
against the clock or each other.
@stream_time can be any value and the result of this function for values outside
of the segment is extrapolated.
When 1 is returned, @stream_time resulted in a positive position returned
in @position.
When this function returns -1, the returned @position should be negated
to get the real negative segment position.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a 1 or -1 on success, 0 on failure.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="stream_time" transfer-ownership="none">
<doc xml:space="preserve">the stream-time</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="position" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the resulting position in the segment</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="set_running_time" c:identifier="gst_segment_set_running_time">
<doc xml:space="preserve">Adjust the start/stop and base values of @segment such that the next valid
buffer will be one with @running_time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the segment could be updated successfully. If %FALSE is
returned, @running_time is -1 or not in @segment.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the running_time in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="to_position" c:identifier="gst_segment_to_position" deprecated="1">
<doc xml:space="preserve">Convert @running_time into a position in the segment so that
gst_segment_to_running_time() with that position returns @running_time.</doc>
<doc-deprecated xml:space="preserve">Use gst_segment_position_from_running_time() instead.</doc-deprecated>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the position in the segment for @running_time. This function returns
-1 when @running_time is -1 or when it is not inside @segment.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="running_time" transfer-ownership="none">
<doc xml:space="preserve">the running_time in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="to_running_time" c:identifier="gst_segment_to_running_time">
<doc xml:space="preserve">Translate @position to the total running time using the currently configured
segment. Position is a value between @segment start and stop time.
This function is typically used by elements that need to synchronize to the
global clock in a pipeline. The running time is a constantly increasing value
starting from 0. When gst_segment_init() is called, this value will reset to
0.
This function returns -1 if the position is outside of @segment start and stop.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the position as the total running time or -1 when an invalid position
was given.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">the position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="to_running_time_full" c:identifier="gst_segment_to_running_time_full" version="1.6">
<doc xml:space="preserve">Translate @position to the total running time using the currently configured
segment. Compared to gst_segment_to_running_time() this function can return
negative running-time.
This function is typically used by elements that need to synchronize buffers
against the clock or each other.
@position can be any value and the result of this function for values outside
of the segment is extrapolated.
When 1 is returned, @position resulted in a positive running-time returned
in @running_time.
When this function returns -1, the returned @running_time should be negated
to get the real negative running time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a 1 or -1 on success, 0 on failure.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">the position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="running_time" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">result running-time</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="to_stream_time" c:identifier="gst_segment_to_stream_time" version="1.8">
<doc xml:space="preserve">Translate @position to stream time using the currently configured
segment. The @position value must be between @segment start and
stop value.
This function is typically used by elements that need to operate on
the stream time of the buffers it receives, such as effect plugins.
In those use cases, @position is typically the buffer timestamp or
clock time that one wants to convert to the stream time.
The stream time is always between 0 and the total duration of the
media stream.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the position in stream_time or -1 when an invalid position
was given.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">the position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</method>
<method name="to_stream_time_full" c:identifier="gst_segment_to_stream_time_full" version="1.8">
<doc xml:space="preserve">Translate @position to the total stream time using the currently configured
segment. Compared to gst_segment_to_stream_time() this function can return
negative stream-time.
This function is typically used by elements that need to synchronize buffers
against the clock or each other.
@position can be any value and the result of this function for values outside
of the segment is extrapolated.
When 1 is returned, @position resulted in a positive stream-time returned
in @stream_time.
When this function returns -1, the returned @stream_time should be negated
to get the real negative stream time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a 1 or -1 on success, 0 on failure.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="segment" transfer-ownership="none">
<doc xml:space="preserve">a #GstSegment structure.</doc>
<type name="Segment" c:type="const GstSegment*"/>
</instance-parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format of the segment.</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
<parameter name="position" transfer-ownership="none">
<doc xml:space="preserve">the position in the segment</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="stream_time" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">result stream-time</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
</record>
<bitfield name="SegmentFlags" glib:type-name="GstSegmentFlags" glib:get-type="gst_segment_flags_get_type" c:type="GstSegmentFlags">
<doc xml:space="preserve">Flags for the GstSegment structure. Currently mapped to the corresponding
values of the seek flags.</doc>
<member name="none" value="0" c:identifier="GST_SEGMENT_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">no flags</doc>
</member>
<member name="reset" value="1" c:identifier="GST_SEGMENT_FLAG_RESET" glib:nick="reset">
<doc xml:space="preserve">reset the pipeline running_time to the segment
running_time</doc>
</member>
<member name="trickmode" value="16" c:identifier="GST_SEGMENT_FLAG_TRICKMODE" glib:nick="trickmode">
<doc xml:space="preserve">perform skip playback (Since: 1.6)</doc>
</member>
<member name="skip" value="16" c:identifier="GST_SEGMENT_FLAG_SKIP" glib:nick="skip">
<doc xml:space="preserve">Deprecated backward compatibility flag, replaced
by @GST_SEGMENT_FLAG_TRICKMODE</doc>
</member>
<member name="segment" value="8" c:identifier="GST_SEGMENT_FLAG_SEGMENT" glib:nick="segment">
<doc xml:space="preserve">send SEGMENT_DONE instead of EOS</doc>
</member>
<member name="trickmode_key_units" value="128" c:identifier="GST_SEGMENT_FLAG_TRICKMODE_KEY_UNITS" glib:nick="trickmode-key-units">
<doc xml:space="preserve">Decode only keyframes, where
possible (Since: 1.6)</doc>
</member>
<member name="trickmode_forward_predicted" value="512" c:identifier="GST_SEGMENT_FLAG_TRICKMODE_FORWARD_PREDICTED" glib:nick="trickmode-forward-predicted">
<doc xml:space="preserve">Decode only keyframes or forward
predicted frames, where possible (Since: 1.18)</doc>
</member>
<member name="trickmode_no_audio" value="256" c:identifier="GST_SEGMENT_FLAG_TRICKMODE_NO_AUDIO" glib:nick="trickmode-no-audio">
<doc xml:space="preserve">Do not decode any audio, where
possible (Since: 1.6)</doc>
</member>
</bitfield>
<bitfield name="StackTraceFlags" version="1.12" glib:type-name="GstStackTraceFlags" glib:get-type="gst_stack_trace_flags_get_type" c:type="GstStackTraceFlags">
<member name="none" value="0" c:identifier="GST_STACK_TRACE_SHOW_NONE" glib:nick="none">
<doc xml:space="preserve">Try to retrieve the minimum information
available, which may be none on some platforms
(Since: 1.18)</doc>
</member>
<member name="full" value="1" c:identifier="GST_STACK_TRACE_SHOW_FULL" glib:nick="full">
<doc xml:space="preserve">Try to retrieve as much information as possible,
including source information when getting the
stack trace</doc>
</member>
</bitfield>
<enumeration name="State" glib:type-name="GstState" glib:get-type="gst_state_get_type" c:type="GstState">
<doc xml:space="preserve">The possible states an element can be in. States can be changed using
gst_element_set_state() and checked using gst_element_get_state().</doc>
<member name="void_pending" value="0" c:identifier="GST_STATE_VOID_PENDING" glib:nick="void-pending">
<doc xml:space="preserve">no pending state.</doc>
</member>
<member name="null" value="1" c:identifier="GST_STATE_NULL" glib:nick="null">
<doc xml:space="preserve">the NULL state or initial state of an element.</doc>
</member>
<member name="ready" value="2" c:identifier="GST_STATE_READY" glib:nick="ready">
<doc xml:space="preserve">the element is ready to go to PAUSED.</doc>
</member>
<member name="paused" value="3" c:identifier="GST_STATE_PAUSED" glib:nick="paused">
<doc xml:space="preserve">the element is PAUSED, it is ready to accept and
process data. Sink elements however only accept one
buffer and then block.</doc>
</member>
<member name="playing" value="4" c:identifier="GST_STATE_PLAYING" glib:nick="playing">
<doc xml:space="preserve">the element is PLAYING, the #GstClock is running and
the data is flowing.</doc>
</member>
</enumeration>
<enumeration name="StateChange" glib:type-name="GstStateChange" glib:get-type="gst_state_change_get_type" c:type="GstStateChange">
<doc xml:space="preserve">These are the different state changes an element goes through.
%GST_STATE_NULL &amp;rArr; %GST_STATE_PLAYING is called an upwards state change
and %GST_STATE_PLAYING &amp;rArr; %GST_STATE_NULL a downwards state change.</doc>
<member name="null_to_ready" value="10" c:identifier="GST_STATE_CHANGE_NULL_TO_READY" glib:nick="null-to-ready">
<doc xml:space="preserve">state change from NULL to READY.
* The element must check if the resources it needs are available. Device
sinks and -sources typically try to probe the device to constrain their
caps.
* The element opens the device (in case feature need to be probed).</doc>
</member>
<member name="ready_to_paused" value="19" c:identifier="GST_STATE_CHANGE_READY_TO_PAUSED" glib:nick="ready-to-paused">
<doc xml:space="preserve">state change from READY to PAUSED.
* The element pads are activated in order to receive data in PAUSED.
Streaming threads are started.
* Some elements might need to return %GST_STATE_CHANGE_ASYNC and complete
the state change when they have enough information. It is a requirement
for sinks to return %GST_STATE_CHANGE_ASYNC and complete the state change
when they receive the first buffer or %GST_EVENT_EOS (preroll).
Sinks also block the dataflow when in PAUSED.
* A pipeline resets the running_time to 0.
* Live sources return %GST_STATE_CHANGE_NO_PREROLL and don't generate data.</doc>
</member>
<member name="paused_to_playing" value="28" c:identifier="GST_STATE_CHANGE_PAUSED_TO_PLAYING" glib:nick="paused-to-playing">
<doc xml:space="preserve">state change from PAUSED to PLAYING.
* Most elements ignore this state change.
* The pipeline selects a #GstClock and distributes this to all the children
before setting them to PLAYING. This means that it is only allowed to
synchronize on the #GstClock in the PLAYING state.
* The pipeline uses the #GstClock and the running_time to calculate the
base_time. The base_time is distributed to all children when performing
the state change.
* Sink elements stop blocking on the preroll buffer or event and start
rendering the data.
* Sinks can post %GST_MESSAGE_EOS in the PLAYING state. It is not allowed
to post %GST_MESSAGE_EOS when not in the PLAYING state.
* While streaming in PAUSED or PLAYING elements can create and remove
sometimes pads.
* Live sources start generating data and return %GST_STATE_CHANGE_SUCCESS.</doc>
</member>
<member name="playing_to_paused" value="35" c:identifier="GST_STATE_CHANGE_PLAYING_TO_PAUSED" glib:nick="playing-to-paused">
<doc xml:space="preserve">state change from PLAYING to PAUSED.
* Most elements ignore this state change.
* The pipeline calculates the running_time based on the last selected
#GstClock and the base_time. It stores this information to continue
playback when going back to the PLAYING state.
* Sinks unblock any #GstClock wait calls.
* When a sink does not have a pending buffer to play, it returns
#GST_STATE_CHANGE_ASYNC from this state change and completes the state
change when it receives a new buffer or an %GST_EVENT_EOS.
* Any queued %GST_MESSAGE_EOS items are removed since they will be reposted
when going back to the PLAYING state. The EOS messages are queued in
#GstBin containers.
* Live sources stop generating data and return %GST_STATE_CHANGE_NO_PREROLL.</doc>
</member>
<member name="paused_to_ready" value="26" c:identifier="GST_STATE_CHANGE_PAUSED_TO_READY" glib:nick="paused-to-ready">
<doc xml:space="preserve">state change from PAUSED to READY.
* Sinks unblock any waits in the preroll.
* Elements unblock any waits on devices
* Chain or get_range functions return %GST_FLOW_FLUSHING.
* The element pads are deactivated so that streaming becomes impossible and
all streaming threads are stopped.
* The sink forgets all negotiated formats
* Elements remove all sometimes pads</doc>
</member>
<member name="ready_to_null" value="17" c:identifier="GST_STATE_CHANGE_READY_TO_NULL" glib:nick="ready-to-null">
<doc xml:space="preserve">state change from READY to NULL.
* Elements close devices
* Elements reset any internal state.</doc>
</member>
<member name="null_to_null" value="9" c:identifier="GST_STATE_CHANGE_NULL_TO_NULL" glib:nick="null-to-null">
<doc xml:space="preserve">state change from NULL to NULL. (Since: 1.14)</doc>
</member>
<member name="ready_to_ready" value="18" c:identifier="GST_STATE_CHANGE_READY_TO_READY" glib:nick="ready-to-ready">
<doc xml:space="preserve">state change from READY to READY,
This might happen when going to PAUSED asynchronously failed, in that case
elements should make sure they are in a proper, coherent READY state. (Since: 1.14)</doc>
</member>
<member name="paused_to_paused" value="27" c:identifier="GST_STATE_CHANGE_PAUSED_TO_PAUSED" glib:nick="paused-to-paused">
<doc xml:space="preserve">state change from PAUSED to PAUSED.
This might happen when elements were in PLAYING state and 'lost state',
they should make sure to go back to real 'PAUSED' state (prerolling for example). (Since: 1.14)</doc>
</member>
<member name="playing_to_playing" value="36" c:identifier="GST_STATE_CHANGE_PLAYING_TO_PLAYING" glib:nick="playing-to-playing">
<doc xml:space="preserve">state change from PLAYING to PLAYING. (Since: 1.14)</doc>
</member>
<function name="get_name" c:identifier="gst_state_change_get_name" version="1.14">
<doc xml:space="preserve">Gets a string representing the given state transition.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a string with the name of the state
result.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="transition" transfer-ownership="none">
<doc xml:space="preserve">a #GstStateChange to get the name of.</doc>
<type name="StateChange" c:type="GstStateChange"/>
</parameter>
</parameters>
</function>
</enumeration>
<enumeration name="StateChangeReturn" glib:type-name="GstStateChangeReturn" glib:get-type="gst_state_change_return_get_type" c:type="GstStateChangeReturn">
<doc xml:space="preserve">The possible return values from a state change function such as
gst_element_set_state(). Only @GST_STATE_CHANGE_FAILURE is a real failure.</doc>
<member name="failure" value="0" c:identifier="GST_STATE_CHANGE_FAILURE" glib:nick="failure">
<doc xml:space="preserve">the state change failed</doc>
</member>
<member name="success" value="1" c:identifier="GST_STATE_CHANGE_SUCCESS" glib:nick="success">
<doc xml:space="preserve">the state change succeeded</doc>
</member>
<member name="async" value="2" c:identifier="GST_STATE_CHANGE_ASYNC" glib:nick="async">
<doc xml:space="preserve">the state change will happen asynchronously</doc>
</member>
<member name="no_preroll" value="3" c:identifier="GST_STATE_CHANGE_NO_PREROLL" glib:nick="no-preroll">
<doc xml:space="preserve">the state change succeeded but the element
cannot produce data in %GST_STATE_PAUSED.
This typically happens with live sources.</doc>
</member>
</enumeration>
<record name="StaticCaps" c:type="GstStaticCaps">
<doc xml:space="preserve">Datastructure to initialize #GstCaps from a string description usually
used in conjunction with GST_STATIC_CAPS() and gst_static_caps_get() to
instantiate a #GstCaps.</doc>
<field name="caps" writable="1">
<doc xml:space="preserve">the cached #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</field>
<field name="string" writable="1">
<doc xml:space="preserve">a string describing a caps</doc>
<type name="utf8" c:type="const char*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<method name="cleanup" c:identifier="gst_static_caps_cleanup">
<doc xml:space="preserve">Clean up the cached caps contained in @static_caps.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="static_caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstStaticCaps to clean</doc>
<type name="StaticCaps" c:type="GstStaticCaps*"/>
</instance-parameter>
</parameters>
</method>
<method name="get" c:identifier="gst_static_caps_get">
<doc xml:space="preserve">Converts a #GstStaticCaps to a #GstCaps.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a pointer to the #GstCaps. Unref
after usage. Since the core holds an additional ref to the
returned caps, use gst_caps_make_writable() on the returned caps
to modify it.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="static_caps" transfer-ownership="none">
<doc xml:space="preserve">the #GstStaticCaps to convert</doc>
<type name="StaticCaps" c:type="GstStaticCaps*"/>
</instance-parameter>
</parameters>
</method>
</record>
<record name="StaticPadTemplate" c:type="GstStaticPadTemplate">
<doc xml:space="preserve">Structure describing the #GstStaticPadTemplate.</doc>
<field name="name_template" writable="1">
<doc xml:space="preserve">the name of the template</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="direction" writable="1">
<doc xml:space="preserve">the direction of the template</doc>
<type name="PadDirection" c:type="GstPadDirection"/>
</field>
<field name="presence" writable="1">
<doc xml:space="preserve">the presence of the template</doc>
<type name="PadPresence" c:type="GstPadPresence"/>
</field>
<field name="static_caps" writable="1">
<doc xml:space="preserve">the caps of the template.</doc>
<type name="StaticCaps" c:type="GstStaticCaps"/>
</field>
<method name="get" c:identifier="gst_static_pad_template_get">
<doc xml:space="preserve">Converts a #GstStaticPadTemplate into a #GstPadTemplate.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a new #GstPadTemplate.</doc>
<type name="PadTemplate" c:type="GstPadTemplate*"/>
</return-value>
<parameters>
<instance-parameter name="pad_template" transfer-ownership="none">
<doc xml:space="preserve">the static pad template</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_caps" c:identifier="gst_static_pad_template_get_caps">
<doc xml:space="preserve">Gets the capabilities of the static pad template.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstCaps of the static pad template.
Unref after usage. Since the core holds an additional
ref to the returned caps, use gst_caps_make_writable()
on the returned caps to modify it.</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="templ" transfer-ownership="none">
<doc xml:space="preserve">a #GstStaticPadTemplate to get capabilities of.</doc>
<type name="StaticPadTemplate" c:type="GstStaticPadTemplate*"/>
</instance-parameter>
</parameters>
</method>
</record>
<class name="Stream" c:symbol-prefix="stream" c:type="GstStream" version="1.10" parent="Object" glib:type-name="GstStream" glib:get-type="gst_stream_get_type" glib:type-struct="StreamClass">
<doc xml:space="preserve">A high-level object representing a single stream. It might be backed, or
not, by an actual flow of data in a pipeline (#GstPad).
A #GstStream does not care about data changes (such as decoding, encoding,
parsing,...) as long as the underlying data flow corresponds to the same
high-level flow (ex: a certain audio track).
A #GstStream contains all the information pertinent to a stream, such as
stream-id, tags, caps, type, ...
Elements can subclass a #GstStream for internal usage (to contain information
pertinent to streams of data).</doc>
<constructor name="new" c:identifier="gst_stream_new" version="1.10">
<doc xml:space="preserve">Create a new #GstStream for the given @stream_id, @caps, @type
and @flags</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</return-value>
<parameters>
<parameter name="stream_id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the id for the new stream. If %NULL,
a new one will be automatically generated</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the #GstCaps of the stream</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the #GstStreamType of the stream</doc>
<type name="StreamType" c:type="GstStreamType"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the #GstStreamFlags of the stream</doc>
<type name="StreamFlags" c:type="GstStreamFlags"/>
</parameter>
</parameters>
</constructor>
<method name="get_caps" c:identifier="gst_stream_get_caps" version="1.10">
<doc xml:space="preserve">Retrieve the caps for @stream, if any</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The #GstCaps for @stream</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream_flags" c:identifier="gst_stream_get_stream_flags" version="1.10">
<doc xml:space="preserve">Retrieve the current stream flags for @stream</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstStreamFlags for @stream</doc>
<type name="StreamFlags" c:type="GstStreamFlags"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream_id" c:identifier="gst_stream_get_stream_id" version="1.10">
<doc xml:space="preserve">Returns the stream ID of @stream.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the stream ID of @stream. Only valid
during the lifetime of @stream.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream_type" c:identifier="gst_stream_get_stream_type" version="1.10">
<doc xml:space="preserve">Retrieve the stream type for @stream</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstStreamType for @stream</doc>
<type name="StreamType" c:type="GstStreamType"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_tags" c:identifier="gst_stream_get_tags" version="1.10">
<doc xml:space="preserve">Retrieve the tags for @stream, if any</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The #GstTagList for @stream</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_caps" c:identifier="gst_stream_set_caps" version="1.10">
<doc xml:space="preserve">Set the caps for the #GstStream</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
<parameter name="caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="set_stream_flags" c:identifier="gst_stream_set_stream_flags" version="1.10">
<doc xml:space="preserve">Set the @flags for the @stream.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">the flags to set on @stream</doc>
<type name="StreamFlags" c:type="GstStreamFlags"/>
</parameter>
</parameters>
</method>
<method name="set_stream_type" c:identifier="gst_stream_set_stream_type" version="1.10">
<doc xml:space="preserve">Set the stream type of @stream</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
<parameter name="stream_type" transfer-ownership="none">
<doc xml:space="preserve">the type to set on @stream</doc>
<type name="StreamType" c:type="GstStreamType"/>
</parameter>
</parameters>
</method>
<method name="set_tags" c:identifier="gst_stream_set_tags" version="1.10">
<doc xml:space="preserve">Set the tags for the #GstStream</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="stream" transfer-ownership="none">
<doc xml:space="preserve">a #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</instance-parameter>
<parameter name="tags" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstTagList</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
</parameters>
</method>
<property name="caps" writable="1" transfer-ownership="none">
<doc xml:space="preserve">The #GstCaps of the #GstStream.</doc>
<type name="Caps"/>
</property>
<property name="stream-flags" writable="1" construct="1" transfer-ownership="none">
<type name="StreamFlags"/>
</property>
<property name="stream-id" writable="1" construct-only="1" transfer-ownership="none">
<doc xml:space="preserve">The unique identifier of the #GstStream. Can only be set at construction
time.</doc>
<type name="utf8" c:type="gchar*"/>
</property>
<property name="stream-type" writable="1" construct="1" transfer-ownership="none">
<doc xml:space="preserve">The #GstStreamType of the #GstStream. Can only be set at construction time.</doc>
<type name="StreamType"/>
</property>
<property name="tags" writable="1" transfer-ownership="none">
<doc xml:space="preserve">The #GstTagList of the #GstStream.</doc>
<type name="TagList"/>
</property>
<field name="object" readable="0" private="1">
<type name="Object" c:type="GstObject"/>
</field>
<field name="stream_id">
<doc xml:space="preserve">The Stream Identifier for this #GstStream</doc>
<type name="utf8" c:type="const gchar*"/>
</field>
<field name="priv" readable="0" private="1">
<type name="StreamPrivate" c:type="GstStreamPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="StreamClass" c:type="GstStreamClass" glib:is-gtype-struct-for="Stream">
<doc xml:space="preserve">GstStream class structure</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent class structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<class name="StreamCollection" c:symbol-prefix="stream_collection" c:type="GstStreamCollection" version="1.10" parent="Object" glib:type-name="GstStreamCollection" glib:get-type="gst_stream_collection_get_type" glib:type-struct="StreamCollectionClass">
<doc xml:space="preserve">A collection of #GstStream that are available.
A #GstStreamCollection will be provided by elements that can make those
streams available. Applications can use the collection to show the user
what streams are available by using %gst_stream_collection_get_stream()
Once posted, a #GstStreamCollection is immutable. Updates are made by sending
a new #GstStreamCollection message, which may or may not share some of
the #GstStream objects from the collection it replaces. The receiver can check
the sender of a stream collection message to know which collection is
obsoleted.
Several elements in a pipeline can provide #GstStreamCollection.
Applications can activate streams from a collection by using the
#GST_EVENT_SELECT_STREAMS event on a pipeline, bin or element.</doc>
<constructor name="new" c:identifier="gst_stream_collection_new" version="1.10">
<doc xml:space="preserve">Create a new #GstStreamCollection.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new #GstStreamCollection.</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</return-value>
<parameters>
<parameter name="upstream_id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The stream id of the parent stream</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<virtual-method name="stream_notify">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="collection" transfer-ownership="none">
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</instance-parameter>
<parameter name="stream" transfer-ownership="none">
<type name="Stream" c:type="GstStream*"/>
</parameter>
<parameter name="pspec" transfer-ownership="none">
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
</parameters>
</virtual-method>
<method name="add_stream" c:identifier="gst_stream_collection_add_stream" version="1.10">
<doc xml:space="preserve">Add the given @stream to the @collection.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the @stream was properly added, else %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</instance-parameter>
<parameter name="stream" transfer-ownership="full">
<doc xml:space="preserve">the #GstStream to add</doc>
<type name="Stream" c:type="GstStream*"/>
</parameter>
</parameters>
</method>
<method name="get_size" c:identifier="gst_stream_collection_get_size" version="1.10">
<doc xml:space="preserve">Get the number of streams this collection contains</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of streams that @collection contains</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_stream" c:identifier="gst_stream_collection_get_stream" version="1.10">
<doc xml:space="preserve">Retrieve the #GstStream with index @index from the collection.
The caller should not modify the returned #GstStream</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">A #GstStream</doc>
<type name="Stream" c:type="GstStream*"/>
</return-value>
<parameters>
<instance-parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">Index of the stream to retrieve</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="get_upstream_id" c:identifier="gst_stream_collection_get_upstream_id" version="1.10">
<doc xml:space="preserve">Returns the upstream id of the @collection.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The upstream id</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="collection" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamCollection</doc>
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</instance-parameter>
</parameters>
</method>
<property name="upstream-id" writable="1" construct="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<field name="object" readable="0" private="1">
<type name="Object" c:type="GstObject"/>
</field>
<field name="upstream_id" readable="0" private="1">
<type name="utf8" c:type="gchar*"/>
</field>
<field name="priv" readable="0" private="1">
<type name="StreamCollectionPrivate" c:type="GstStreamCollectionPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<glib:signal name="stream-notify" when="first" no-recurse="1" detailed="1" no-hooks="1">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<type name="Stream"/>
</parameter>
<parameter name="p0" transfer-ownership="none">
<type name="GObject.ParamSpec"/>
</parameter>
</parameters>
</glib:signal>
</class>
<record name="StreamCollectionClass" c:type="GstStreamCollectionClass" glib:is-gtype-struct-for="StreamCollection">
<doc xml:space="preserve">GstStreamCollection class structure</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent class structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="stream_notify">
<callback name="stream_notify">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="collection" transfer-ownership="none">
<type name="StreamCollection" c:type="GstStreamCollection*"/>
</parameter>
<parameter name="stream" transfer-ownership="none">
<type name="Stream" c:type="GstStream*"/>
</parameter>
<parameter name="pspec" transfer-ownership="none">
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="StreamCollectionPrivate" c:type="GstStreamCollectionPrivate" disguised="1"/>
<enumeration name="StreamError" glib:type-name="GstStreamError" glib:get-type="gst_stream_error_get_type" c:type="GstStreamError" glib:error-domain="gst-stream-error-quark">
<doc xml:space="preserve">Stream errors are for anything related to the stream being processed:
format errors, media type errors, ...
They're typically used by decoders, demuxers, converters, ...</doc>
<member name="failed" value="1" c:identifier="GST_STREAM_ERROR_FAILED" glib:nick="failed">
<doc xml:space="preserve">a general error which doesn't fit in any other
category. Make sure you add a custom message to the error call.</doc>
</member>
<member name="too_lazy" value="2" c:identifier="GST_STREAM_ERROR_TOO_LAZY" glib:nick="too-lazy">
<doc xml:space="preserve">do not use this except as a placeholder for
deciding where to go while developing code.</doc>
</member>
<member name="not_implemented" value="3" c:identifier="GST_STREAM_ERROR_NOT_IMPLEMENTED" glib:nick="not-implemented">
<doc xml:space="preserve">use this when you do not want to implement
this functionality yet.</doc>
</member>
<member name="type_not_found" value="4" c:identifier="GST_STREAM_ERROR_TYPE_NOT_FOUND" glib:nick="type-not-found">
<doc xml:space="preserve">used when the element doesn't know the
stream's type.</doc>
</member>
<member name="wrong_type" value="5" c:identifier="GST_STREAM_ERROR_WRONG_TYPE" glib:nick="wrong-type">
<doc xml:space="preserve">used when the element doesn't handle this type
of stream.</doc>
</member>
<member name="codec_not_found" value="6" c:identifier="GST_STREAM_ERROR_CODEC_NOT_FOUND" glib:nick="codec-not-found">
<doc xml:space="preserve">used when there's no codec to handle the
stream's type.</doc>
</member>
<member name="decode" value="7" c:identifier="GST_STREAM_ERROR_DECODE" glib:nick="decode">
<doc xml:space="preserve">used when decoding fails.</doc>
</member>
<member name="encode" value="8" c:identifier="GST_STREAM_ERROR_ENCODE" glib:nick="encode">
<doc xml:space="preserve">used when encoding fails.</doc>
</member>
<member name="demux" value="9" c:identifier="GST_STREAM_ERROR_DEMUX" glib:nick="demux">
<doc xml:space="preserve">used when demuxing fails.</doc>
</member>
<member name="mux" value="10" c:identifier="GST_STREAM_ERROR_MUX" glib:nick="mux">
<doc xml:space="preserve">used when muxing fails.</doc>
</member>
<member name="format" value="11" c:identifier="GST_STREAM_ERROR_FORMAT" glib:nick="format">
<doc xml:space="preserve">used when the stream is of the wrong format
(for example, wrong caps).</doc>
</member>
<member name="decrypt" value="12" c:identifier="GST_STREAM_ERROR_DECRYPT" glib:nick="decrypt">
<doc xml:space="preserve">used when the stream is encrypted and can't be
decrypted because this is not supported by the element.</doc>
</member>
<member name="decrypt_nokey" value="13" c:identifier="GST_STREAM_ERROR_DECRYPT_NOKEY" glib:nick="decrypt-nokey">
<doc xml:space="preserve">used when the stream is encrypted and
can't be decrypted because no suitable key is available.</doc>
</member>
<member name="num_errors" value="14" c:identifier="GST_STREAM_ERROR_NUM_ERRORS" glib:nick="num-errors">
<doc xml:space="preserve">the number of stream error types.</doc>
</member>
<function name="quark" c:identifier="gst_stream_error_quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<bitfield name="StreamFlags" version="1.2" glib:type-name="GstStreamFlags" glib:get-type="gst_stream_flags_get_type" c:type="GstStreamFlags">
<member name="none" value="0" c:identifier="GST_STREAM_FLAG_NONE" glib:nick="none">
<doc xml:space="preserve">This stream has no special attributes</doc>
</member>
<member name="sparse" value="1" c:identifier="GST_STREAM_FLAG_SPARSE" glib:nick="sparse">
<doc xml:space="preserve">This stream is a sparse stream (e.g. a subtitle
stream), data may flow only in irregular intervals with large gaps in
between.</doc>
</member>
<member name="select" value="2" c:identifier="GST_STREAM_FLAG_SELECT" glib:nick="select">
<doc xml:space="preserve">This stream should be selected by default. This
flag may be used by demuxers to signal that a stream should be selected
by default in a playback scenario.</doc>
</member>
<member name="unselect" value="4" c:identifier="GST_STREAM_FLAG_UNSELECT" glib:nick="unselect">
<doc xml:space="preserve">This stream should not be selected by default.
This flag may be used by demuxers to signal that a stream should not
be selected by default in a playback scenario, but only if explicitly
selected by the user (e.g. an audio track for the hard of hearing or
a director's commentary track).</doc>
</member>
</bitfield>
<record name="StreamPrivate" c:type="GstStreamPrivate" disguised="1"/>
<enumeration name="StreamStatusType" glib:type-name="GstStreamStatusType" glib:get-type="gst_stream_status_type_get_type" c:type="GstStreamStatusType">
<doc xml:space="preserve">The type of a %GST_MESSAGE_STREAM_STATUS. The stream status messages inform the
application of new streaming threads and their status.</doc>
<member name="create" value="0" c:identifier="GST_STREAM_STATUS_TYPE_CREATE" glib:nick="create">
<doc xml:space="preserve">A new thread need to be created.</doc>
</member>
<member name="enter" value="1" c:identifier="GST_STREAM_STATUS_TYPE_ENTER" glib:nick="enter">
<doc xml:space="preserve">a thread entered its loop function</doc>
</member>
<member name="leave" value="2" c:identifier="GST_STREAM_STATUS_TYPE_LEAVE" glib:nick="leave">
<doc xml:space="preserve">a thread left its loop function</doc>
</member>
<member name="destroy" value="3" c:identifier="GST_STREAM_STATUS_TYPE_DESTROY" glib:nick="destroy">
<doc xml:space="preserve">a thread is destroyed</doc>
</member>
<member name="start" value="8" c:identifier="GST_STREAM_STATUS_TYPE_START" glib:nick="start">
<doc xml:space="preserve">a thread is started</doc>
</member>
<member name="pause" value="9" c:identifier="GST_STREAM_STATUS_TYPE_PAUSE" glib:nick="pause">
<doc xml:space="preserve">a thread is paused</doc>
</member>
<member name="stop" value="10" c:identifier="GST_STREAM_STATUS_TYPE_STOP" glib:nick="stop">
<doc xml:space="preserve">a thread is stopped</doc>
</member>
</enumeration>
<bitfield name="StreamType" version="1.10" glib:type-name="GstStreamType" glib:get-type="gst_stream_type_get_type" c:type="GstStreamType">
<doc xml:space="preserve">#GstStreamType describes a high level classification set for
flows of data in #GstStream objects.
Note that this is a flag, and therefore users should not assume it
will be a single value. Do not use the equality operator for checking
whether a stream is of a certain type.</doc>
<member name="unknown" value="1" c:identifier="GST_STREAM_TYPE_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">The stream is of unknown (unclassified) type.</doc>
</member>
<member name="audio" value="2" c:identifier="GST_STREAM_TYPE_AUDIO" glib:nick="audio">
<doc xml:space="preserve">The stream is of audio data</doc>
</member>
<member name="video" value="4" c:identifier="GST_STREAM_TYPE_VIDEO" glib:nick="video">
<doc xml:space="preserve">The stream carries video data</doc>
</member>
<member name="container" value="8" c:identifier="GST_STREAM_TYPE_CONTAINER" glib:nick="container">
<doc xml:space="preserve">The stream is a muxed container type</doc>
</member>
<member name="text" value="16" c:identifier="GST_STREAM_TYPE_TEXT" glib:nick="text">
<doc xml:space="preserve">The stream contains subtitle / subpicture data.</doc>
</member>
<function name="get_name" c:identifier="gst_stream_type_get_name" version="1.10">
<doc xml:space="preserve">Get a descriptive string for a given #GstStreamType</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A string describing the stream type</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="stype" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamType</doc>
<type name="StreamType" c:type="GstStreamType"/>
</parameter>
</parameters>
</function>
</bitfield>
<record name="Structure" c:type="GstStructure" glib:type-name="GstStructure" glib:get-type="gst_structure_get_type" c:symbol-prefix="structure">
<doc xml:space="preserve">A #GstStructure is a collection of key/value pairs. The keys are expressed as
GQuarks and the values can be of any GType.
In addition to the key/value pairs, a #GstStructure also has a name. The name
starts with a letter and can be filled by letters, numbers and any of
"/-_.:".
#GstStructure is used by various GStreamer subsystems to store information in
a flexible and extensible way. A #GstStructure does not have a refcount
because it usually is part of a higher level object such as #GstCaps,
#GstMessage, #GstEvent, #GstQuery. It provides a means to enforce mutability
using the refcount of the parent with the gst_structure_set_parent_refcount()
method.
A #GstStructure can be created with gst_structure_new_empty() or
gst_structure_new(), which both take a name and an optional set of key/value
pairs along with the types of the values.
Field values can be changed with gst_structure_set_value() or
gst_structure_set().
Field values can be retrieved with gst_structure_get_value() or the more
convenient gst_structure_get_*() functions.
Fields can be removed with gst_structure_remove_field() or
gst_structure_remove_fields().
Strings in structures must be ASCII or UTF-8 encoded. Other encodings are not
allowed. Strings may be %NULL however.
## The serialization format
GstStructure serialization format serialize the GstStructure name,
keys/GType/values in a comma separated list with the structure name as first
field without value followed by separated key/value pairs in the form
`key=value`, for example:
```
a-structure, key=value
````
The values type will be inferred if not explicitly specified with the
`(GTypeName)value` syntax, for example the following struct will have one
field called 'is-string' which has the string 'true' as a value:
```
a-struct, field-is-string=(string)true, field-is-boolean=true
```
*Note*: without specifying `(string), `field-is-string` type would have been
inferred as boolean.
*Note*: we specified `(string)` as a type even if `gchararray` is the actual
GType name as for convenience some well known types have been aliased or
abbreviated.
To avoid specifying the type, you can give some hints to the "type system".
For example to specify a value as a double, you should add a decimal (ie. `1`
is an `int` while `1.0` is a `double`).
*Note*: when a structure is serialized with #gst_structure_to_string, all
values are explicitly typed.
Some types have special delimiters:
- [GstValueArray](GST_TYPE_ARRAY) are inside curly brackets (`{` and `}`).
For example `a-structure, array={1, 2, 3}`
- Ranges are inside brackets (`[` and `]`). For example `a-structure,
range=[1, 6, 2]` 1 being the min value, 6 the maximum and 2 the step. To
specify a #GST_TYPE_INT64_RANGE you need to explicitly specify it like:
`a-structure, a-int64-range=(gint64) [1, 5]`
- [GstValueList](GST_TYPE_LIST) are inside "less and greater than" (`&lt;` and
`&gt;`). For example `a-structure, list=&lt;1, 2, 3&gt;
Structures are delimited either by a null character `\0` or a semicolumn `;`
the latter allowing to store multiple structures in the same string (see
#GstCaps).
Quotes are used as "default" delimiters and can be used around any types that
don't use other delimiters (for example `a-struct, i=(int)"1"`). They are use
to allow adding spaces or special characters (such as delimiters,
semicolumns, etc..) inside strings and you can use backslashes `\` to escape
characters inside them, for example:
```
a-struct, special="\"{[(;)]}\" can be used inside quotes"
```
They also allow for nested structure, such as:
```
a-struct, nested=(GstStructure)"nested-struct, nested=true"
```
&gt; *Note*: Be aware that the current #GstCaps / #GstStructure serialization
&gt; into string has limited support for nested #GstCaps / #GstStructure fields.
&gt; It can only support one level of nesting. Using more levels will lead to
&gt; unexpected behavior when using serialization features, such as
&gt; gst_caps_to_string() or gst_value_serialize() and their counterparts.</doc>
<field name="type" writable="1">
<doc xml:space="preserve">the GType of a structure</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="name" readable="0" private="1">
<type name="GLib.Quark" c:type="GQuark"/>
</field>
<constructor name="from_string" c:identifier="gst_structure_from_string">
<doc xml:space="preserve">Creates a #GstStructure from a string representation.
If end is not %NULL, a pointer to the place inside the given string
where parsing ended will be returned.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstStructure or %NULL
when the string could not be parsed. Free with
gst_structure_free() after use.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="string" transfer-ownership="none">
<doc xml:space="preserve">a string representation of a #GstStructure.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="end" direction="out" caller-allocates="0" transfer-ownership="none" optional="1" allow-none="1" skip="1">
<doc xml:space="preserve">pointer to store the end of the string in.</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</constructor>
<constructor name="new" c:identifier="gst_structure_new" introspectable="0">
<doc xml:space="preserve">Creates a new #GstStructure with the given name. Parses the
list of variable arguments and sets fields to the values listed.
Variable arguments should be passed as field name, field type,
and value. Last variable argument should be %NULL.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of new structure</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="firstfield" transfer-ownership="none">
<doc xml:space="preserve">name of first field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional arguments</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_empty" c:identifier="gst_structure_new_empty">
<doc xml:space="preserve">Creates a new, empty #GstStructure with the given @name.
See gst_structure_set_name() for constraints on the @name parameter.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of new structure</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_from_string" c:identifier="gst_structure_new_from_string" version="1.2">
<doc xml:space="preserve">Creates a #GstStructure from a string representation.
If end is not %NULL, a pointer to the place inside the given string
where parsing ended will be returned.
The current implementation of serialization will lead to unexpected results
when there are nested #GstCaps / #GstStructure deeper than one level.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstStructure or %NULL
when the string could not be parsed. Free with
gst_structure_free() after use.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="string" transfer-ownership="none">
<doc xml:space="preserve">a string representation of a #GstStructure</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_id" c:identifier="gst_structure_new_id" introspectable="0">
<doc xml:space="preserve">Creates a new #GstStructure with the given name as a GQuark, followed by
fieldname quark, GType, argument(s) "triplets" in the same format as
gst_structure_id_set(). Basically a convenience wrapper around
gst_structure_new_id_empty() and gst_structure_id_set().
The last variable argument must be %NULL (or 0).
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="name_quark" transfer-ownership="none">
<doc xml:space="preserve">name of new structure</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="field_quark" transfer-ownership="none">
<doc xml:space="preserve">the GQuark for the name of the field to set</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_id_empty" c:identifier="gst_structure_new_id_empty">
<doc xml:space="preserve">Creates a new, empty #GstStructure with the given name as a GQuark.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new, empty #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="quark" transfer-ownership="none">
<doc xml:space="preserve">name of new structure</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_valist" c:identifier="gst_structure_new_valist" introspectable="0">
<doc xml:space="preserve">Creates a new #GstStructure with the given @name. Structure fields
are set according to the varargs in a manner similar to
gst_structure_new().
See gst_structure_set_name() for constraints on the @name parameter.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of new structure</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="firstfield" transfer-ownership="none">
<doc xml:space="preserve">name of first field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">variable argument list</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</constructor>
<method name="can_intersect" c:identifier="gst_structure_can_intersect">
<doc xml:space="preserve">Tries intersecting @struct1 and @struct2 and reports whether the result
would not be empty.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if intersection would not be empty</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="struct1" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="struct2" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_structure_copy">
<doc xml:space="preserve">Duplicates a #GstStructure and all its fields and values.
Free-function: gst_structure_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstStructure.</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure to duplicate</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="filter_and_map_in_place" c:identifier="gst_structure_filter_and_map_in_place" version="1.6">
<doc xml:space="preserve">Calls the provided function once for each field in the #GstStructure. In
contrast to gst_structure_foreach(), the function may modify the fields.
In contrast to gst_structure_map_in_place(), the field is removed from
the structure if %FALSE is returned from the function.
The structure must be mutable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="StructureFilterMapFunc" c:type="GstStructureFilterMapFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="fixate" c:identifier="gst_structure_fixate">
<doc xml:space="preserve">Fixate all values in @structure using gst_value_fixate().
@structure will be modified in-place and should be writable.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="fixate_field" c:identifier="gst_structure_fixate_field">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given field with its fixated value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure field could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
</parameters>
</method>
<method name="fixate_field_boolean" c:identifier="gst_structure_fixate_field_boolean">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given @field_name field to the given
@target boolean if that field is not fixed yet.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the target value of the fixation</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</method>
<method name="fixate_field_nearest_double" c:identifier="gst_structure_fixate_field_nearest_double">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given field to the nearest
double to @target that is a subset of the existing field.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the target value of the fixation</doc>
<type name="gdouble" c:type="double"/>
</parameter>
</parameters>
</method>
<method name="fixate_field_nearest_fraction" c:identifier="gst_structure_fixate_field_nearest_fraction">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given field to the nearest
fraction to @target_numerator/@target_denominator that is a subset
of the existing field.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="target_numerator" transfer-ownership="none">
<doc xml:space="preserve">The numerator of the target value of the fixation</doc>
<type name="gint" c:type="const gint"/>
</parameter>
<parameter name="target_denominator" transfer-ownership="none">
<doc xml:space="preserve">The denominator of the target value of the fixation</doc>
<type name="gint" c:type="const gint"/>
</parameter>
</parameters>
</method>
<method name="fixate_field_nearest_int" c:identifier="gst_structure_fixate_field_nearest_int">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given field to the nearest
integer to @target that is a subset of the existing field.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the target value of the fixation</doc>
<type name="gint" c:type="int"/>
</parameter>
</parameters>
</method>
<method name="fixate_field_string" c:identifier="gst_structure_fixate_field_string">
<doc xml:space="preserve">Fixates a #GstStructure by changing the given @field_name field to the given
@target string if that field is not fixed yet.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure could be fixated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field_name" transfer-ownership="none">
<doc xml:space="preserve">a field in @structure</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="target" transfer-ownership="none">
<doc xml:space="preserve">the target value of the fixation</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="foreach" c:identifier="gst_structure_foreach">
<doc xml:space="preserve">Calls the provided function once for each field in the #GstStructure. The
function must not modify the fields. Also see gst_structure_map_in_place()
and gst_structure_filter_and_map_in_place().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the supplied function returns %TRUE For each of the fields,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="StructureForeachFunc" c:type="GstStructureForeachFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="free" c:identifier="gst_structure_free">
<doc xml:space="preserve">Frees a #GstStructure and all its fields and values. The structure must not
have a parent when this function is called.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="full">
<doc xml:space="preserve">the #GstStructure to free</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="get" c:identifier="gst_structure_get" introspectable="0">
<doc xml:space="preserve">Parses the variable arguments and reads fields from @structure accordingly.
Variable arguments should be in the form field name, field type
(as a GType), pointer(s) to a variable(s) to hold the return value(s).
The last variable argument should be %NULL.
For refcounted (mini)objects you will receive a new reference which
you must release with a suitable _unref\() when no longer needed. For
strings and boxed types you will receive a copy which you will need to
release with either g_free() or the suitable function for the boxed type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if there was a problem reading any of the fields (e.g.
because the field requested did not exist, or was of a type other
than the type specified), otherwise %TRUE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="first_fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the first field to read</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="get_array" c:identifier="gst_structure_get_array" version="1.12">
<doc xml:space="preserve">This is useful in language bindings where unknown #GValue types are not
supported. This function will convert the %GST_TYPE_ARRAY into a newly
allocated #GValueArray and return it through @array. Be aware that this is
slower then getting the #GValue directly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a %GST_TYPE_ARRAY,
this function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #GValueArray</doc>
<type name="GObject.ValueArray" c:type="GValueArray**"/>
</parameter>
</parameters>
</method>
<method name="get_boolean" c:identifier="gst_structure_get_boolean">
<doc xml:space="preserve">Sets the boolean pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a boolean, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #gboolean to set</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="get_clock_time" c:identifier="gst_structure_get_clock_time">
<doc xml:space="preserve">Sets the clock time pointed to by @value corresponding to the clock time
of the given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a #GstClockTime, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #GstClockTime to set</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
</parameters>
</method>
<method name="get_date" c:identifier="gst_structure_get_date">
<doc xml:space="preserve">Sets the date pointed to by @value corresponding to the date of the
given field. Caller is responsible for making sure the field exists
and has the correct type.
On success @value will point to a newly-allocated copy of the date which
should be freed with g_date_free() when no longer needed (note: this is
inconsistent with e.g. gst_structure_get_string() which doesn't return a
copy of the string).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a data, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #GDate to set</doc>
<type name="GLib.Date" c:type="GDate**"/>
</parameter>
</parameters>
</method>
<method name="get_date_time" c:identifier="gst_structure_get_date_time">
<doc xml:space="preserve">Sets the datetime pointed to by @value corresponding to the datetime of the
given field. Caller is responsible for making sure the field exists
and has the correct type.
On success @value will point to a reference of the datetime which
should be unreffed with gst_date_time_unref() when no longer needed
(note: this is inconsistent with e.g. gst_structure_get_string()
which doesn't return a copy of the string).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a data, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #GstDateTime to set</doc>
<type name="DateTime" c:type="GstDateTime**"/>
</parameter>
</parameters>
</method>
<method name="get_double" c:identifier="gst_structure_get_double">
<doc xml:space="preserve">Sets the double pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a double, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a gdouble to set</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="get_enum" c:identifier="gst_structure_get_enum">
<doc xml:space="preserve">Sets the int pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists,
has the correct type and that the enumtype is correct.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain an enum of the given
type, this function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="enumtype" transfer-ownership="none">
<doc xml:space="preserve">the enum type of a field</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to an int to set</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_field_type" c:identifier="gst_structure_get_field_type">
<doc xml:space="preserve">Finds the field with the given name, and returns the type of the
value it contains. If the field is not found, G_TYPE_INVALID is
returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GValue of the field</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_flagset" c:identifier="gst_structure_get_flagset" version="1.6">
<doc xml:space="preserve">Read the GstFlagSet flags and mask out of the structure into the
provided pointers.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the values could be set correctly. If there was no field
with @fieldname or the existing field did not contain a GstFlagSet, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value_flags" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to a guint for the flags field</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="value_mask" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">a pointer to a guint for the mask field</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="get_fraction" c:identifier="gst_structure_get_fraction">
<doc xml:space="preserve">Sets the integers pointed to by @value_numerator and @value_denominator
corresponding to the value of the given field. Caller is responsible
for making sure the field exists and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the values could be set correctly. If there was no field
with @fieldname or the existing field did not contain a GstFraction, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value_numerator" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to an int to set</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="value_denominator" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to an int to set</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_int" c:identifier="gst_structure_get_int">
<doc xml:space="preserve">Sets the int pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain an int, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to an int to set</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_int64" c:identifier="gst_structure_get_int64" version="1.4">
<doc xml:space="preserve">Sets the #gint64 pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a #gint64, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #gint64 to set</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="get_list" c:identifier="gst_structure_get_list" version="1.12">
<doc xml:space="preserve">This is useful in language bindings where unknown #GValue types are not
supported. This function will convert the %GST_TYPE_LIST into a newly
allocated GValueArray and return it through @array. Be aware that this is
slower then getting the #GValue directly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a %GST_TYPE_LIST, this
function returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #GValueArray</doc>
<type name="GObject.ValueArray" c:type="GValueArray**"/>
</parameter>
</parameters>
</method>
<method name="get_name" c:identifier="gst_structure_get_name">
<doc xml:space="preserve">Get the name of @structure as a string.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name of the structure.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_name_id" c:identifier="gst_structure_get_name_id">
<doc xml:space="preserve">Get the name of @structure as a GQuark.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark representing the name of the structure.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_string" c:identifier="gst_structure_get_string">
<doc xml:space="preserve">Finds the field corresponding to @fieldname, and returns the string
contained in the field's value. Caller is responsible for making
sure the field exists and has the correct type.
The string should not be modified, and remains valid until the next
call to a gst_structure_*() function with the given structure.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer to the string or %NULL when the
field did not exist or did not contain a string.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_uint" c:identifier="gst_structure_get_uint">
<doc xml:space="preserve">Sets the uint pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a uint, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a uint to set</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="get_uint64" c:identifier="gst_structure_get_uint64" version="1.4">
<doc xml:space="preserve">Sets the #guint64 pointed to by @value corresponding to the value of the
given field. Caller is responsible for making sure the field exists
and has the correct type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the value could be set correctly. If there was no field
with @fieldname or the existing field did not contain a #guint64, this function
returns %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a pointer to a #guint64 to set</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="get_valist" c:identifier="gst_structure_get_valist" introspectable="0">
<doc xml:space="preserve">Parses the variable arguments and reads fields from @structure accordingly.
valist-variant of gst_structure_get(). Look at the documentation of
gst_structure_get() for more details.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, or %FALSE if there was a problem reading any of the fields</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="first_fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the first field to read</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="args" transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="get_value" c:identifier="gst_structure_get_value">
<doc xml:space="preserve">Get the value of the field with name @fieldname.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GValue corresponding to the field with the given
name.</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to get</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="has_field" c:identifier="gst_structure_has_field">
<doc xml:space="preserve">Check if @structure contains a field named @fieldname.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure contains a field with the given name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="has_field_typed" c:identifier="gst_structure_has_field_typed">
<doc xml:space="preserve">Check if @structure contains a field named @fieldname and with GType @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure contains a field with the given name and type</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the type of a value</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="has_name" c:identifier="gst_structure_has_name">
<doc xml:space="preserve">Checks if the structure has the given name</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @name matches the name of the structure.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">structure name to check for</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="id_get" c:identifier="gst_structure_id_get" introspectable="0">
<doc xml:space="preserve">Parses the variable arguments and reads fields from @structure accordingly.
Variable arguments should be in the form field id quark, field type
(as a GType), pointer(s) to a variable(s) to hold the return value(s).
The last variable argument should be %NULL (technically it should be a
0 quark, but we require %NULL so compilers that support it can check for
the %NULL terminator and warn if it's not there).
This function is just like gst_structure_get() only that it is slightly
more efficient since it saves the string-to-quark lookup in the global
quark hashtable.
For refcounted (mini)objects you will receive a new reference which
you must release with a suitable _unref\() when no longer needed. For
strings and boxed types you will receive a copy which you will need to
release with either g_free() or the suitable function for the boxed type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE if there was a problem reading any of the fields (e.g.
because the field requested did not exist, or was of a type other
than the type specified), otherwise %TRUE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="first_field_id" transfer-ownership="none">
<doc xml:space="preserve">the quark of the first field to read</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="id_get_valist" c:identifier="gst_structure_id_get_valist" introspectable="0">
<doc xml:space="preserve">Parses the variable arguments and reads fields from @structure accordingly.
valist-variant of gst_structure_id_get(). Look at the documentation of
gst_structure_id_get() for more details.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, or %FALSE if there was a problem reading any of the fields</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="first_field_id" transfer-ownership="none">
<doc xml:space="preserve">the quark of the first field to read</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="args" transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="id_get_value" c:identifier="gst_structure_id_get_value">
<doc xml:space="preserve">Get the value of the field with GQuark @field.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GValue corresponding to the field with the given
name identifier.</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">the #GQuark of the field to get</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="id_has_field" c:identifier="gst_structure_id_has_field">
<doc xml:space="preserve">Check if @structure contains a field named @field.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure contains a field with the given name</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">#GQuark of the field name</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</method>
<method name="id_has_field_typed" c:identifier="gst_structure_id_has_field_typed">
<doc xml:space="preserve">Check if @structure contains a field named @field and with GType @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the structure contains a field with the given name and type</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">#GQuark of the field name</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the type of a value</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</method>
<method name="id_set" c:identifier="gst_structure_id_set" introspectable="0">
<doc xml:space="preserve">Identical to gst_structure_set, except that field names are
passed using the GQuark for the field name. This allows more efficient
setting of the structure if the caller already knows the associated
quark values.
The last variable argument must be %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the GQuark for the name of the field to set</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="id_set_valist" c:identifier="gst_structure_id_set_valist" introspectable="0">
<doc xml:space="preserve">va_list form of gst_structure_id_set().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to set</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="id_set_value" c:identifier="gst_structure_id_set_value">
<doc xml:space="preserve">Sets the field with the given GQuark @field to @value. If the field
does not exist, it is created. If the field exists, the previous
value is replaced and freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">a #GQuark representing a field</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the new value of the field</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="id_take_value" c:identifier="gst_structure_id_take_value">
<doc xml:space="preserve">Sets the field with the given GQuark @field to @value. If the field
does not exist, it is created. If the field exists, the previous
value is replaced and freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="field" transfer-ownership="none">
<doc xml:space="preserve">a #GQuark representing a field</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="value" transfer-ownership="full">
<doc xml:space="preserve">the new value of the field</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</method>
<method name="intersect" c:identifier="gst_structure_intersect">
<doc xml:space="preserve">Intersects @struct1 and @struct2 and returns the intersection.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">Intersection of @struct1 and @struct2</doc>
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<instance-parameter name="struct1" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="struct2" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="is_equal" c:identifier="gst_structure_is_equal">
<doc xml:space="preserve">Tests if the two #GstStructure are equal.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the two structures have the same name and field.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure1" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="structure2" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure.</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="is_subset" c:identifier="gst_structure_is_subset">
<doc xml:space="preserve">Checks if @subset is a subset of @superset, i.e. has the same
structure name and for all fields that are existing in @superset,
@subset has a value that is a subset of the value in @superset.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @subset is a subset of @superset</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="subset" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="superset" transfer-ownership="none">
<doc xml:space="preserve">a potentially greater #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</method>
<method name="map_in_place" c:identifier="gst_structure_map_in_place">
<doc xml:space="preserve">Calls the provided function once for each field in the #GstStructure. In
contrast to gst_structure_foreach(), the function may modify but not delete the
fields. The structure must be mutable.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the supplied function returns %TRUE For each of the fields,
%FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">a function to call for each field</doc>
<type name="StructureMapFunc" c:type="GstStructureMapFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">private data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="n_fields" c:identifier="gst_structure_n_fields">
<doc xml:space="preserve">Get the number of fields in the structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of fields in the structure</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="nth_field_name" c:identifier="gst_structure_nth_field_name">
<doc xml:space="preserve">Get the name of the given field number, counting from 0 onwards.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name of the given field number</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the index to get the name of</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="remove_all_fields" c:identifier="gst_structure_remove_all_fields">
<doc xml:space="preserve">Removes all fields in a GstStructure.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_field" c:identifier="gst_structure_remove_field">
<doc xml:space="preserve">Removes the field with the given name. If the field with the given
name does not exist, the structure is unchanged.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="remove_fields" c:identifier="gst_structure_remove_fields" introspectable="0">
<doc xml:space="preserve">Removes the fields with the given names. If a field does not exist, the
argument is ignored.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">%NULL-terminated list of more fieldnames to remove</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="remove_fields_valist" c:identifier="gst_structure_remove_fields_valist" introspectable="0">
<doc xml:space="preserve">va_list form of gst_structure_remove_fields().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">%NULL-terminated list of more fieldnames to remove</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="set" c:identifier="gst_structure_set" introspectable="0">
<doc xml:space="preserve">Parses the variable arguments and sets fields accordingly. Fields that
weren't already part of the structure are added as needed.
Variable arguments should be in the form field name, field type
(as a GType), value(s). The last variable argument should be %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="set_array" c:identifier="gst_structure_set_array" version="1.12">
<doc xml:space="preserve">This is useful in language bindings where unknown GValue types are not
supported. This function will convert a @array to %GST_TYPE_ARRAY and set
the field specified by @fieldname. Be aware that this is slower then using
%GST_TYPE_ARRAY in a #GValue directly.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GValueArray</doc>
<type name="GObject.ValueArray" c:type="const GValueArray*"/>
</parameter>
</parameters>
</method>
<method name="set_list" c:identifier="gst_structure_set_list" version="1.12">
<doc xml:space="preserve">This is useful in language bindings where unknown GValue types are not
supported. This function will convert a @array to %GST_TYPE_LIST and set
the field specified by @fieldname. Be aware that this is slower then using
%GST_TYPE_LIST in a #GValue directly.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of a field</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GValueArray</doc>
<type name="GObject.ValueArray" c:type="const GValueArray*"/>
</parameter>
</parameters>
</method>
<method name="set_name" c:identifier="gst_structure_set_name">
<doc xml:space="preserve">Sets the name of the structure to the given @name. The string
provided is copied before being used. It must not be empty, start with a
letter and can be followed by letters, numbers and any of "/-_.:".</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the new name of the structure</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_parent_refcount" c:identifier="gst_structure_set_parent_refcount">
<doc xml:space="preserve">Sets the parent_refcount field of #GstStructure. This field is used to
determine whether a structure is mutable or not. This function should only be
called by code implementing parent objects of #GstStructure, as described in
the MT Refcounting section of the design documents.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the parent refcount could be set.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="refcount" transfer-ownership="none">
<doc xml:space="preserve">a pointer to the parent's refcount</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="set_valist" c:identifier="gst_structure_set_valist" introspectable="0">
<doc xml:space="preserve">va_list form of gst_structure_set().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="varargs" transfer-ownership="none">
<doc xml:space="preserve">variable arguments</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="set_value" c:identifier="gst_structure_set_value">
<doc xml:space="preserve">Sets the field with the given name @field to @value. If the field
does not exist, it is created. If the field exists, the previous
value is replaced and freed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the new value of the field</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="take_value" c:identifier="gst_structure_take_value">
<doc xml:space="preserve">Sets the field with the given name @field to @value. If the field
does not exist, it is created. If the field exists, the previous
value is replaced and freed. The function will take ownership of @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</instance-parameter>
<parameter name="fieldname" transfer-ownership="none">
<doc xml:space="preserve">the name of the field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="full">
<doc xml:space="preserve">the new value of the field</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</method>
<method name="to_string" c:identifier="gst_structure_to_string">
<doc xml:space="preserve">Converts @structure to a human-readable string representation.
For debugging purposes its easier to do something like this:
|[&lt;!-- language="C" --&gt;
GST_LOG ("structure is %" GST_PTR_FORMAT, structure);
]|
This prints the structure in human readable form.
The current implementation of serialization will lead to unexpected results
when there are nested #GstCaps / #GstStructure deeper than one level.
Free-function: g_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a pointer to string allocated by g_malloc().
g_free() after usage.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">a #GstStructure</doc>
<type name="Structure" c:type="const GstStructure*"/>
</instance-parameter>
</parameters>
</method>
<function name="take" c:identifier="gst_structure_take" version="1.18">
<doc xml:space="preserve">Atomically modifies a pointer to point to a new structure.
The #GstStructure @oldstr_ptr is pointing to is freed and
@newstr is taken ownership over.
Either @newstr and the value pointed to by @oldstr_ptr may be %NULL.
It is a programming error if both @newstr and the value pointed to by
@oldstr_ptr refer to the same, non-%NULL structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newstr was different from @oldstr_ptr</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="oldstr_ptr" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a place of
a #GstStructure to take</doc>
<type name="Structure" c:type="GstStructure**"/>
</parameter>
<parameter name="newstr" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">a new #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</function>
</record>
<enumeration name="StructureChangeType" glib:type-name="GstStructureChangeType" glib:get-type="gst_structure_change_type_get_type" c:type="GstStructureChangeType">
<doc xml:space="preserve">The type of a %GST_MESSAGE_STRUCTURE_CHANGE.</doc>
<member name="link" value="0" c:identifier="GST_STRUCTURE_CHANGE_TYPE_PAD_LINK" glib:nick="link">
<doc xml:space="preserve">Pad linking is starting or done.</doc>
</member>
<member name="unlink" value="1" c:identifier="GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK" glib:nick="unlink">
<doc xml:space="preserve">Pad unlinking is starting or done.</doc>
</member>
</enumeration>
<callback name="StructureFilterMapFunc" c:type="GstStructureFilterMapFunc">
<doc xml:space="preserve">A function that will be called in gst_structure_filter_and_map_in_place().
The function may modify @value, and the value will be removed from
the structure if %FALSE is returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the field should be preserved, %FALSE if it
should be removed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="field_id" transfer-ownership="none">
<doc xml:space="preserve">the #GQuark of the field name</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the #GValue of the field</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="StructureForeachFunc" c:type="GstStructureForeachFunc">
<doc xml:space="preserve">A function that will be called in gst_structure_foreach(). The function may
not modify @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the foreach operation should continue, %FALSE if
the foreach operation should stop with %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="field_id" transfer-ownership="none">
<doc xml:space="preserve">the #GQuark of the field name</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the #GValue of the field</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<callback name="StructureMapFunc" c:type="GstStructureMapFunc">
<doc xml:space="preserve">A function that will be called in gst_structure_map_in_place(). The function
may modify @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the map operation should continue, %FALSE if
the map operation should stop with %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="field_id" transfer-ownership="none">
<doc xml:space="preserve">the #GQuark of the field name</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the #GValue of the field</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<class name="SystemClock" c:symbol-prefix="system_clock" c:type="GstSystemClock" parent="Clock" glib:type-name="GstSystemClock" glib:get-type="gst_system_clock_get_type" glib:type-struct="SystemClockClass">
<doc xml:space="preserve">The GStreamer core provides a GstSystemClock based on the system time.
Asynchronous callbacks are scheduled from an internal thread.
Clock implementors are encouraged to subclass this systemclock as it
implements the async notification.
Subclasses can however override all of the important methods for sync and
async notifications to implement their own callback methods or blocking
wait operations.</doc>
<function name="obtain" c:identifier="gst_system_clock_obtain">
<doc xml:space="preserve">Get a handle to the default system clock. The refcount of the
clock will be increased so you need to unref the clock after
usage.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the default clock.
MT safe.</doc>
<type name="Clock" c:type="GstClock*"/>
</return-value>
</function>
<function name="set_default" c:identifier="gst_system_clock_set_default" version="1.4">
<doc xml:space="preserve">Sets the default system clock that can be obtained with
gst_system_clock_obtain().
This is mostly used for testing and debugging purposes when you
want to have control over the time reported by the default system
clock.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="new_clock" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstClock</doc>
<type name="Clock" c:type="GstClock*"/>
</parameter>
</parameters>
</function>
<property name="clock-type" writable="1" transfer-ownership="none">
<type name="ClockType"/>
</property>
<field name="clock">
<type name="Clock" c:type="GstClock"/>
</field>
<field name="priv" readable="0" private="1">
<type name="SystemClockPrivate" c:type="GstSystemClockPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="SystemClockClass" c:type="GstSystemClockClass" glib:is-gtype-struct-for="SystemClock">
<field name="parent_class">
<type name="ClockClass" c:type="GstClockClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<record name="SystemClockPrivate" c:type="GstSystemClockPrivate" disguised="1"/>
<constant name="TAG_ALBUM" value="album" c:type="GST_TAG_ALBUM">
<doc xml:space="preserve">album containing this data (string)
The album name as it should be displayed, e.g. 'The Jazz Guitar'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_ARTIST" value="album-artist" c:type="GST_TAG_ALBUM_ARTIST">
<doc xml:space="preserve">The artist of the entire album, as it should be displayed.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_ARTIST_SORTNAME" value="album-artist-sortname" c:type="GST_TAG_ALBUM_ARTIST_SORTNAME">
<doc xml:space="preserve">The artist of the entire album, as it should be sorted.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_GAIN" value="replaygain-album-gain" c:type="GST_TAG_ALBUM_GAIN">
<doc xml:space="preserve">album gain in db (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_PEAK" value="replaygain-album-peak" c:type="GST_TAG_ALBUM_PEAK">
<doc xml:space="preserve">peak of the album (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_SORTNAME" value="album-sortname" c:type="GST_TAG_ALBUM_SORTNAME">
<doc xml:space="preserve">album containing this data, as used for sorting (string)
The album name as it should be sorted, e.g. 'Jazz Guitar, The'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_VOLUME_COUNT" value="album-disc-count" c:type="GST_TAG_ALBUM_VOLUME_COUNT">
<doc xml:space="preserve">count of discs inside collection this disc belongs to (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ALBUM_VOLUME_NUMBER" value="album-disc-number" c:type="GST_TAG_ALBUM_VOLUME_NUMBER">
<doc xml:space="preserve">disc number inside a collection (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_APPLICATION_DATA" value="application-data" c:type="GST_TAG_APPLICATION_DATA">
<doc xml:space="preserve">Arbitrary application data (sample)
Some formats allow applications to add their own arbitrary data
into files. This data is application dependent.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_APPLICATION_NAME" value="application-name" c:type="GST_TAG_APPLICATION_NAME">
<doc xml:space="preserve">Name of the application used to create the media (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ARTIST" value="artist" c:type="GST_TAG_ARTIST">
<doc xml:space="preserve">person(s) responsible for the recording (string)
The artist name as it should be displayed, e.g. 'Jimi Hendrix' or
'The Guitar Heroes'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ARTIST_SORTNAME" value="artist-sortname" c:type="GST_TAG_ARTIST_SORTNAME">
<doc xml:space="preserve">person(s) responsible for the recording, as used for sorting (string)
The artist name as it should be sorted, e.g. 'Hendrix, Jimi' or
'Guitar Heroes, The'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ATTACHMENT" value="attachment" c:type="GST_TAG_ATTACHMENT">
<doc xml:space="preserve">generic file attachment (sample) (sample taglist should specify the content
type and if possible set "filename" to the file name of the
attachment)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_AUDIO_CODEC" value="audio-codec" c:type="GST_TAG_AUDIO_CODEC">
<doc xml:space="preserve">codec the audio data is stored in (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_BEATS_PER_MINUTE" value="beats-per-minute" c:type="GST_TAG_BEATS_PER_MINUTE">
<doc xml:space="preserve">number of beats per minute in audio (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_BITRATE" value="bitrate" c:type="GST_TAG_BITRATE">
<doc xml:space="preserve">exact or average bitrate in bits/s (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_CODEC" value="codec" c:type="GST_TAG_CODEC">
<doc xml:space="preserve">codec the data is stored in (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_COMMENT" value="comment" c:type="GST_TAG_COMMENT">
<doc xml:space="preserve">free text commenting the data (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_COMPOSER" value="composer" c:type="GST_TAG_COMPOSER">
<doc xml:space="preserve">person(s) who composed the recording (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_COMPOSER_SORTNAME" value="composer-sortname" c:type="GST_TAG_COMPOSER_SORTNAME">
<doc xml:space="preserve">The composer's name, used for sorting (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_CONDUCTOR" value="conductor" c:type="GST_TAG_CONDUCTOR" version="1.8">
<doc xml:space="preserve">conductor/performer refinement (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_CONTACT" value="contact" c:type="GST_TAG_CONTACT">
<doc xml:space="preserve">contact information (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_CONTAINER_FORMAT" value="container-format" c:type="GST_TAG_CONTAINER_FORMAT">
<doc xml:space="preserve">container format the data is stored in (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_COPYRIGHT" value="copyright" c:type="GST_TAG_COPYRIGHT">
<doc xml:space="preserve">copyright notice of the data (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_COPYRIGHT_URI" value="copyright-uri" c:type="GST_TAG_COPYRIGHT_URI">
<doc xml:space="preserve">URI to location where copyright details can be found (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DATE" value="date" c:type="GST_TAG_DATE">
<doc xml:space="preserve">date the data was created (#GDate structure)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DATE_TIME" value="datetime" c:type="GST_TAG_DATE_TIME">
<doc xml:space="preserve">date and time the data was created (#GstDateTime structure)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DESCRIPTION" value="description" c:type="GST_TAG_DESCRIPTION">
<doc xml:space="preserve">short text describing the content of the data (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DEVICE_MANUFACTURER" value="device-manufacturer" c:type="GST_TAG_DEVICE_MANUFACTURER">
<doc xml:space="preserve">Manufacturer of the device used to create the media (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DEVICE_MODEL" value="device-model" c:type="GST_TAG_DEVICE_MODEL">
<doc xml:space="preserve">Model of the device used to create the media (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_DURATION" value="duration" c:type="GST_TAG_DURATION">
<doc xml:space="preserve">length in GStreamer time units (nanoseconds) (unsigned 64-bit integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ENCODED_BY" value="encoded-by" c:type="GST_TAG_ENCODED_BY">
<doc xml:space="preserve">name of the person or organisation that encoded the file. May contain a
copyright message if the person or organisation also holds the copyright
(string)
Note: do not use this field to describe the encoding application. Use
#GST_TAG_APPLICATION_NAME or #GST_TAG_COMMENT for that.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ENCODER" value="encoder" c:type="GST_TAG_ENCODER">
<doc xml:space="preserve">encoder used to encode this stream (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ENCODER_VERSION" value="encoder-version" c:type="GST_TAG_ENCODER_VERSION">
<doc xml:space="preserve">version of the encoder used to encode this stream (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_EXTENDED_COMMENT" value="extended-comment" c:type="GST_TAG_EXTENDED_COMMENT">
<doc xml:space="preserve">key/value text commenting the data (string)
Must be in the form of 'key=comment' or
'key[lc]=comment' where 'lc' is an ISO-639
language code.
This tag is used for unknown Vorbis comment tags,
unknown APE tags and certain ID3v2 comment fields.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TAG_FLAG_IS_VALID" c:identifier="GST_TAG_FLAG_IS_VALID" introspectable="0">
<parameters>
<parameter name="flag">
</parameter>
</parameters>
</function-macro>
<constant name="TAG_GENRE" value="genre" c:type="GST_TAG_GENRE">
<doc xml:space="preserve">genre this data belongs to (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_CAPTURE_DIRECTION" value="geo-location-capture-direction" c:type="GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION">
<doc xml:space="preserve">Indicates the direction the device is pointing to when capturing
a media. It is represented as degrees in floating point representation,
0 means the geographic north, and increases clockwise (double from 0 to 360)
See also #GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_CITY" value="geo-location-city" c:type="GST_TAG_GEO_LOCATION_CITY">
<doc xml:space="preserve">The city (english name) where the media has been produced (string).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_COUNTRY" value="geo-location-country" c:type="GST_TAG_GEO_LOCATION_COUNTRY">
<doc xml:space="preserve">The country (english name) where the media has been produced (string).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_ELEVATION" value="geo-location-elevation" c:type="GST_TAG_GEO_LOCATION_ELEVATION">
<doc xml:space="preserve">geo elevation of where the media has been recorded or produced in meters
according to WGS84 (zero is average sea level) (double).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_HORIZONTAL_ERROR" value="geo-location-horizontal-error" c:type="GST_TAG_GEO_LOCATION_HORIZONTAL_ERROR">
<doc xml:space="preserve">Represents the expected error on the horizontal positioning in
meters (double).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_LATITUDE" value="geo-location-latitude" c:type="GST_TAG_GEO_LOCATION_LATITUDE">
<doc xml:space="preserve">geo latitude location of where the media has been recorded or produced in
degrees according to WGS84 (zero at the equator, negative values for southern
latitudes) (double).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_LONGITUDE" value="geo-location-longitude" c:type="GST_TAG_GEO_LOCATION_LONGITUDE">
<doc xml:space="preserve">geo longitude location of where the media has been recorded or produced in
degrees according to WGS84 (zero at the prime meridian in Greenwich/UK,
negative values for western longitudes). (double).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_MOVEMENT_DIRECTION" value="geo-location-movement-direction" c:type="GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION">
<doc xml:space="preserve">Indicates the movement direction of the device performing the capture
of a media. It is represented as degrees in floating point representation,
0 means the geographic north, and increases clockwise (double from 0 to 360)
See also #GST_TAG_GEO_LOCATION_CAPTURE_DIRECTION</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_MOVEMENT_SPEED" value="geo-location-movement-speed" c:type="GST_TAG_GEO_LOCATION_MOVEMENT_SPEED">
<doc xml:space="preserve">Speed of the capturing device when performing the capture.
Represented in m/s. (double)
See also #GST_TAG_GEO_LOCATION_MOVEMENT_DIRECTION</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_NAME" value="geo-location-name" c:type="GST_TAG_GEO_LOCATION_NAME">
<doc xml:space="preserve">human readable descriptive location of where the media has been recorded or
produced. (string).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GEO_LOCATION_SUBLOCATION" value="geo-location-sublocation" c:type="GST_TAG_GEO_LOCATION_SUBLOCATION">
<doc xml:space="preserve">A location 'smaller' than GST_TAG_GEO_LOCATION_CITY that specifies better
where the media has been produced. (e.g. the neighborhood) (string).
This tag has been added as this is how it is handled/named in XMP's
Iptc4xmpcore schema.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_GROUPING" value="grouping" c:type="GST_TAG_GROUPING">
<doc xml:space="preserve">Groups together media that are related and spans multiple tracks. An
example are multiple pieces of a concerto. (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_HOMEPAGE" value="homepage" c:type="GST_TAG_HOMEPAGE">
<doc xml:space="preserve">Homepage for this media (i.e. artist or movie homepage) (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_IMAGE" value="image" c:type="GST_TAG_IMAGE">
<doc xml:space="preserve">image (sample) (sample taglist should specify the content type and preferably
also set "image-type" field as `GstTagImageType`)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_IMAGE_ORIENTATION" value="image-orientation" c:type="GST_TAG_IMAGE_ORIENTATION">
<doc xml:space="preserve">Represents the 'Orientation' tag from EXIF. Defines how the image
should be rotated and mirrored for display. (string)
This tag has a predefined set of allowed values:
"rotate-0"
"rotate-90"
"rotate-180"
"rotate-270"
"flip-rotate-0"
"flip-rotate-90"
"flip-rotate-180"
"flip-rotate-270"
The naming is adopted according to a possible transformation to perform
on the image to fix its orientation, obviously equivalent operations will
yield the same result.
Rotations indicated by the values are in clockwise direction and
'flip' means an horizontal mirroring.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_INTERPRETED_BY" value="interpreted-by" c:type="GST_TAG_INTERPRETED_BY" version="1.2">
<doc xml:space="preserve">Information about the people behind a remix and similar
interpretations of another existing piece (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ISRC" value="isrc" c:type="GST_TAG_ISRC">
<doc xml:space="preserve">International Standard Recording Code - see http://www.ifpi.org/isrc/ (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_KEYWORDS" value="keywords" c:type="GST_TAG_KEYWORDS">
<doc xml:space="preserve">comma separated keywords describing the content (string).</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_LANGUAGE_CODE" value="language-code" c:type="GST_TAG_LANGUAGE_CODE">
<doc xml:space="preserve">ISO-639-2 or ISO-639-1 code for the language the content is in (string)
There is utility API in libgsttag in gst-plugins-base to obtain a translated
language name from the language code: `gst_tag_get_language_name()`</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_LANGUAGE_NAME" value="language-name" c:type="GST_TAG_LANGUAGE_NAME">
<doc xml:space="preserve">Name of the language the content is in (string)
Free-form name of the language the content is in, if a language code
is not available. This tag should not be set in addition to a language
code. It is undefined what language or locale the language name is in.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_LICENSE" value="license" c:type="GST_TAG_LICENSE">
<doc xml:space="preserve">license of data (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_LICENSE_URI" value="license-uri" c:type="GST_TAG_LICENSE_URI">
<doc xml:space="preserve">URI to location where license details can be found (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TAG_LIST" c:identifier="GST_TAG_LIST" introspectable="0">
<parameters>
<parameter name="x">
</parameter>
</parameters>
</function-macro>
<constant name="TAG_LOCATION" value="location" c:type="GST_TAG_LOCATION">
<doc xml:space="preserve">Origin of media as a URI (location, where the original of the file or stream
is hosted) (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_LYRICS" value="lyrics" c:type="GST_TAG_LYRICS">
<doc xml:space="preserve">The lyrics of the media (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_MAXIMUM_BITRATE" value="maximum-bitrate" c:type="GST_TAG_MAXIMUM_BITRATE">
<doc xml:space="preserve">maximum bitrate in bits/s (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_MIDI_BASE_NOTE" value="midi-base-note" c:type="GST_TAG_MIDI_BASE_NOTE" version="1.4">
<doc xml:space="preserve">[Midi note number](http://en.wikipedia.org/wiki/Note#Note_designation_in_accordance_with_octave_name)
of the audio track. This is useful for sample instruments and in particular
for multi-samples.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_MINIMUM_BITRATE" value="minimum-bitrate" c:type="GST_TAG_MINIMUM_BITRATE">
<doc xml:space="preserve">minimum bitrate in bits/s (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TAG_MODE_IS_VALID" c:identifier="GST_TAG_MODE_IS_VALID" introspectable="0">
<parameters>
<parameter name="mode">
</parameter>
</parameters>
</function-macro>
<constant name="TAG_NOMINAL_BITRATE" value="nominal-bitrate" c:type="GST_TAG_NOMINAL_BITRATE">
<doc xml:space="preserve">nominal bitrate in bits/s (unsigned integer). The actual bitrate might be
different from this target bitrate.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_ORGANIZATION" value="organization" c:type="GST_TAG_ORGANIZATION">
<doc xml:space="preserve">organization (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_PERFORMER" value="performer" c:type="GST_TAG_PERFORMER">
<doc xml:space="preserve">person(s) performing (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_PREVIEW_IMAGE" value="preview-image" c:type="GST_TAG_PREVIEW_IMAGE">
<doc xml:space="preserve">image that is meant for preview purposes, e.g. small icon-sized version
(sample) (sample taglist should specify the content type)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_PRIVATE_DATA" value="private-data" c:type="GST_TAG_PRIVATE_DATA" version="1.8">
<doc xml:space="preserve">Any private data that may be contained in tags (sample).
It is represented by #GstSample in which #GstBuffer contains the
binary data and the sample's info #GstStructure may contain any
extra information that identifies the origin or meaning of the data.
Private frames in ID3v2 tags ('PRIV' frames) will be represented
using this tag, in which case the GstStructure will be named
"ID3PrivateFrame" and contain a field named "owner" of type string
which contains the owner-identification string from the tag.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_PUBLISHER" value="publisher" c:type="GST_TAG_PUBLISHER" version="1.2">
<doc xml:space="preserve">Name of the label or publisher (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_REFERENCE_LEVEL" value="replaygain-reference-level" c:type="GST_TAG_REFERENCE_LEVEL">
<doc xml:space="preserve">reference level of track and album gain values (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_SERIAL" value="serial" c:type="GST_TAG_SERIAL">
<doc xml:space="preserve">serial number of track (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TAG_SETTER" c:identifier="GST_TAG_SETTER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TAG_SETTER_GET_INTERFACE" c:identifier="GST_TAG_SETTER_GET_INTERFACE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="TAG_SHOW_EPISODE_NUMBER" value="show-episode-number" c:type="GST_TAG_SHOW_EPISODE_NUMBER">
<doc xml:space="preserve">Number of the episode within a season/show (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_SHOW_NAME" value="show-name" c:type="GST_TAG_SHOW_NAME">
<doc xml:space="preserve">Name of the show, used for displaying (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_SHOW_SEASON_NUMBER" value="show-season-number" c:type="GST_TAG_SHOW_SEASON_NUMBER">
<doc xml:space="preserve">Number of the season of a show/series (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_SHOW_SORTNAME" value="show-sortname" c:type="GST_TAG_SHOW_SORTNAME">
<doc xml:space="preserve">Name of the show, used for sorting (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_SUBTITLE_CODEC" value="subtitle-codec" c:type="GST_TAG_SUBTITLE_CODEC">
<doc xml:space="preserve">codec/format the subtitle data is stored in (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TITLE" value="title" c:type="GST_TAG_TITLE">
<doc xml:space="preserve">commonly used title (string)
The title as it should be displayed, e.g. 'The Doll House'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TITLE_SORTNAME" value="title-sortname" c:type="GST_TAG_TITLE_SORTNAME">
<doc xml:space="preserve">commonly used title, as used for sorting (string)
The title as it should be sorted, e.g. 'Doll House, The'</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TRACK_COUNT" value="track-count" c:type="GST_TAG_TRACK_COUNT">
<doc xml:space="preserve">count of tracks inside collection this track belongs to (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TRACK_GAIN" value="replaygain-track-gain" c:type="GST_TAG_TRACK_GAIN">
<doc xml:space="preserve">track gain in db (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TRACK_NUMBER" value="track-number" c:type="GST_TAG_TRACK_NUMBER">
<doc xml:space="preserve">track number inside a collection (unsigned integer)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_TRACK_PEAK" value="replaygain-track-peak" c:type="GST_TAG_TRACK_PEAK">
<doc xml:space="preserve">peak of the track (double)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_USER_RATING" value="user-rating" c:type="GST_TAG_USER_RATING">
<doc xml:space="preserve">Rating attributed by a person (likely the application user).
The higher the value, the more the user likes this media
(unsigned int from 0 to 100)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_VERSION" value="version" c:type="GST_TAG_VERSION">
<doc xml:space="preserve">version of this data (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<constant name="TAG_VIDEO_CODEC" value="video-codec" c:type="GST_TAG_VIDEO_CODEC">
<doc xml:space="preserve">codec the video data is stored in (string)</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TASK" c:identifier="GST_TASK" introspectable="0">
<parameters>
<parameter name="task">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_BROADCAST" c:identifier="GST_TASK_BROADCAST" introspectable="0">
<doc xml:space="preserve">Send a broadcast signal to all waiting task conds</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to broadcast</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_CAST" c:identifier="GST_TASK_CAST" introspectable="0">
<parameters>
<parameter name="task">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_CLASS" c:identifier="GST_TASK_CLASS" introspectable="0">
<parameters>
<parameter name="tclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_GET_CLASS" c:identifier="GST_TASK_GET_CLASS" introspectable="0">
<parameters>
<parameter name="task">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_GET_COND" c:identifier="GST_TASK_GET_COND" introspectable="0">
<doc xml:space="preserve">Get access to the cond of the task.</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to get the cond of</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_GET_LOCK" c:identifier="GST_TASK_GET_LOCK" introspectable="0">
<doc xml:space="preserve">Get access to the task lock.</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to get the lock of</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_POOL" c:identifier="GST_TASK_POOL" introspectable="0">
<parameters>
<parameter name="pool">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_POOL_CAST" c:identifier="GST_TASK_POOL_CAST" introspectable="0">
<parameters>
<parameter name="pool">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_POOL_CLASS" c:identifier="GST_TASK_POOL_CLASS" introspectable="0">
<parameters>
<parameter name="pclass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_POOL_GET_CLASS" c:identifier="GST_TASK_POOL_GET_CLASS" introspectable="0">
<parameters>
<parameter name="pool">
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_SIGNAL" c:identifier="GST_TASK_SIGNAL" introspectable="0">
<doc xml:space="preserve">Signal the task cond</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to signal</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_STATE" c:identifier="GST_TASK_STATE" introspectable="0">
<doc xml:space="preserve">Get access to the state of the task.</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to get the state of</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TASK_WAIT" c:identifier="GST_TASK_WAIT" introspectable="0">
<doc xml:space="preserve">Wait for the task cond to be signalled</doc>
<parameters>
<parameter name="task">
<doc xml:space="preserve">Task to wait for</doc>
</parameter>
</parameters>
</function-macro>
<constant name="TIMEP_FORMAT" value="paT" c:type="GST_TIMEP_FORMAT" version="1.18" introspectable="0">
<doc xml:space="preserve">printf format type used to debug GStreamer ClockTime pointers. You can use
this in combination with GStreamer's debug logging system as well as the
functions gst_info_vasprintf(), gst_info_strdup_vprintf() and
gst_info_strdup_printf() to pretty-print #GstClockTime pointers. This can
only be used on pointers to GstClockTime values.</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TIMESPEC_TO_TIME" c:identifier="GST_TIMESPEC_TO_TIME" introspectable="0">
<doc xml:space="preserve">Convert a struct timespec (see man pselect) to a #GstClockTime.</doc>
<parameters>
<parameter name="ts">
<doc xml:space="preserve">the timespec to convert</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIMEVAL_TO_TIME" c:identifier="GST_TIMEVAL_TO_TIME" introspectable="0">
<doc xml:space="preserve">Convert a GTimeVal to a #GstClockTime.</doc>
<parameters>
<parameter name="tv">
<doc xml:space="preserve">the timeval to convert</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_ARGS" c:identifier="GST_TIME_ARGS" introspectable="0">
<doc xml:space="preserve">Format @t for the #GST_TIME_FORMAT format string. Note: @t will be
evaluated more than once.</doc>
<parameters>
<parameter name="t">
<doc xml:space="preserve">a #GstClockTime</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_AS_MSECONDS" c:identifier="GST_TIME_AS_MSECONDS" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to milliseconds (1/1000 of a second).</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">the time</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_AS_NSECONDS" c:identifier="GST_TIME_AS_NSECONDS" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to nanoseconds (1/1000000000 of a second).</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">the time</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_AS_SECONDS" c:identifier="GST_TIME_AS_SECONDS" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to seconds.</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">the time</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_AS_USECONDS" c:identifier="GST_TIME_AS_USECONDS" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to microseconds (1/1000000 of a second).</doc>
<parameters>
<parameter name="time">
<doc xml:space="preserve">the time</doc>
</parameter>
</parameters>
</function-macro>
<constant name="TIME_FORMAT" value="u:%02u:%02u.%09u" c:type="GST_TIME_FORMAT" introspectable="0">
<doc xml:space="preserve">A string that can be used in printf-like format strings to display a
#GstClockTime value in h:m:s format. Use GST_TIME_ARGS() to construct
the matching arguments.
Example:
|[&lt;!-- language="C" --&gt;
printf("%" GST_TIME_FORMAT "\n", GST_TIME_ARGS(ts));
]|</doc>
<type name="utf8" c:type="gchar*"/>
</constant>
<function-macro name="TIME_TO_TIMESPEC" c:identifier="GST_TIME_TO_TIMESPEC" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to a struct timespec (see man pselect)</doc>
<parameters>
<parameter name="t">
<doc xml:space="preserve">The #GstClockTime to convert</doc>
</parameter>
<parameter name="ts">
<doc xml:space="preserve">The target timespec</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TIME_TO_TIMEVAL" c:identifier="GST_TIME_TO_TIMEVAL" introspectable="0">
<doc xml:space="preserve">Convert a #GstClockTime to a GTimeVal
&gt; on 32-bit systems, a timeval has a range of only 2^32 - 1 seconds,
&gt; which is about 68 years. Expect trouble if you want to schedule stuff
&gt; in your pipeline for 2038.</doc>
<parameters>
<parameter name="t">
<doc xml:space="preserve">The #GstClockTime to convert</doc>
</parameter>
<parameter name="tv">
<doc xml:space="preserve">The target timeval</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TOC_ENTRY_TYPE_IS_ALTERNATIVE" c:identifier="GST_TOC_ENTRY_TYPE_IS_ALTERNATIVE" introspectable="0">
<doc xml:space="preserve">Checks if @entry_type indicates that its #GstTocEntry is an alternative.</doc>
<parameters>
<parameter name="entry_type">
<doc xml:space="preserve">The #GstTocEntryType from a #GstTocEntry</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="TOC_ENTRY_TYPE_IS_SEQUENCE" c:identifier="GST_TOC_ENTRY_TYPE_IS_SEQUENCE" introspectable="0">
<doc xml:space="preserve">Checks if @entry_type indicates that its #GstTocEntry is a sequence.</doc>
<parameters>
<parameter name="entry_type">
<doc xml:space="preserve">The #GstTocEntryType from a #GstTocEntry</doc>
</parameter>
</parameters>
</function-macro>
<constant name="TOC_REPEAT_COUNT_INFINITE" value="-1" c:type="GST_TOC_REPEAT_COUNT_INFINITE" version="1.4">
<doc xml:space="preserve">Special value for the repeat_count set in gst_toc_entry_set_loop() or
returned by gst_toc_entry_set_loop() to indicate infinite looping.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="TOC_SETTER" c:identifier="GST_TOC_SETTER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TOC_SETTER_GET_IFACE" c:identifier="GST_TOC_SETTER_GET_IFACE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER" c:identifier="GST_TRACER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_CAST" c:identifier="GST_TRACER_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_CLASS" c:identifier="GST_TRACER_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_FACTORY" c:identifier="GST_TRACER_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_FACTORY_CAST" c:identifier="GST_TRACER_FACTORY_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_FACTORY_CLASS" c:identifier="GST_TRACER_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_FACTORY_GET_CLASS" c:identifier="GST_TRACER_FACTORY_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_GET_CLASS" c:identifier="GST_TRACER_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_RECORD" c:identifier="GST_TRACER_RECORD" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_RECORD_CAST" c:identifier="GST_TRACER_RECORD_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_RECORD_CLASS" c:identifier="GST_TRACER_RECORD_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TRACER_RECORD_GET_CLASS" c:identifier="GST_TRACER_RECORD_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TYPE_FIND_FACTORY" c:identifier="GST_TYPE_FIND_FACTORY" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="TYPE_FIND_FACTORY_CLASS" c:identifier="GST_TYPE_FIND_FACTORY_CLASS" introspectable="0">
<parameters>
<parameter name="klass">
</parameter>
</parameters>
</function-macro>
<function-macro name="TYPE_FIND_FACTORY_GET_CLASS" c:identifier="GST_TYPE_FIND_FACTORY_GET_CLASS" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<enumeration name="TagFlag" glib:type-name="GstTagFlag" glib:get-type="gst_tag_flag_get_type" c:type="GstTagFlag">
<doc xml:space="preserve">Extra tag flags used when registering tags.</doc>
<member name="undefined" value="0" c:identifier="GST_TAG_FLAG_UNDEFINED" glib:nick="undefined">
<doc xml:space="preserve">undefined flag</doc>
</member>
<member name="meta" value="1" c:identifier="GST_TAG_FLAG_META" glib:nick="meta">
<doc xml:space="preserve">tag is meta data</doc>
</member>
<member name="encoded" value="2" c:identifier="GST_TAG_FLAG_ENCODED" glib:nick="encoded">
<doc xml:space="preserve">tag is encoded</doc>
</member>
<member name="decoded" value="3" c:identifier="GST_TAG_FLAG_DECODED" glib:nick="decoded">
<doc xml:space="preserve">tag is decoded</doc>
</member>
<member name="count" value="4" c:identifier="GST_TAG_FLAG_COUNT" glib:nick="count">
<doc xml:space="preserve">number of tag flags</doc>
</member>
</enumeration>
<callback name="TagForeachFunc" c:type="GstTagForeachFunc">
<doc xml:space="preserve">A function that will be called in gst_tag_list_foreach(). The function may
not modify the tag list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">the #GstTagList</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">a name of a tag in @list</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="TagList" c:type="GstTagList" glib:type-name="GstTagList" glib:get-type="gst_tag_list_get_type" c:symbol-prefix="tag_list">
<doc xml:space="preserve">List of tags and values used to describe media metadata.
Strings in structures must be ASCII or UTF-8 encoded. Other encodings are
not allowed. Strings must not be empty or %NULL.</doc>
<field name="mini_object" writable="1">
<doc xml:space="preserve">the parent type</doc>
<type name="MiniObject" c:type="GstMiniObject"/>
</field>
<constructor name="new" c:identifier="gst_tag_list_new" introspectable="0">
<doc xml:space="preserve">Creates a new taglist and appends the values for the given tags. It expects
tag-value pairs like gst_tag_list_add(), and a %NULL terminator after the
last pair. The type of the values is implicit and is documented in the API
reference, but can also be queried at runtime with gst_tag_get_type(). It
is an error to pass a value of a type not matching the tag type into this
function. The tag list will make copies of any arguments passed
(e.g. strings, buffers).
After creation you might also want to set a #GstTagScope on the returned
taglist to signal if the contained tags are global or stream tags. By
default stream scope is assumes. See gst_tag_list_set_scope().
Free-function: gst_tag_list_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstTagList. Free with gst_tag_list_unref()
when no longer needed.</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">%NULL-terminated list of values to set</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<constructor name="new_empty" c:identifier="gst_tag_list_new_empty">
<doc xml:space="preserve">Creates a new empty GstTagList.
Free-function: gst_tag_list_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">An empty tag list</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
</constructor>
<constructor name="new_from_string" c:identifier="gst_tag_list_new_from_string">
<doc xml:space="preserve">Deserializes a tag list.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstTagList, or %NULL in case of an
error.</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<parameter name="str" transfer-ownership="none">
<doc xml:space="preserve">a string created with gst_tag_list_to_string()</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<constructor name="new_valist" c:identifier="gst_tag_list_new_valist" introspectable="0">
<doc xml:space="preserve">Just like gst_tag_list_new(), only that it takes a va_list argument.
Useful mostly for language bindings.
Free-function: gst_tag_list_unref</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstTagList. Free with gst_tag_list_unref()
when no longer needed.</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">tag / value pairs to set</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</constructor>
<method name="add" c:identifier="gst_tag_list_add" introspectable="0">
<doc xml:space="preserve">Sets the values for the given tags using the specified mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to set tags in</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">%NULL-terminated list of values to set</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="add_valist" c:identifier="gst_tag_list_add_valist" introspectable="0">
<doc xml:space="preserve">Sets the values for the given tags using the specified mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to set tags in</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">tag / value pairs to set</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="add_valist_values" c:identifier="gst_tag_list_add_valist_values" introspectable="0">
<doc xml:space="preserve">Sets the GValues for the given tags using the specified mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to set tags in</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">tag / GValue pairs to set</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="add_value" c:identifier="gst_tag_list_add_value">
<doc xml:space="preserve">Sets the GValue for a given tag using the specified mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to set tags in</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">GValue for this tag</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="add_values" c:identifier="gst_tag_list_add_values" introspectable="0">
<doc xml:space="preserve">Sets the GValues for the given tags using the specified mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to set tags in</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">GValues to set</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="copy" c:identifier="gst_tag_list_copy">
<doc xml:space="preserve">Creates a new #GstTagList as a copy of the old @taglist. The new taglist
will have a refcount of 1, owned by the caller, and will be writable as
a result.
Note that this function is the semantic equivalent of a gst_tag_list_ref()
followed by a gst_tag_list_make_writable(). If you only want to hold on to a
reference to the data, you should use gst_tag_list_ref().
When you are finished with the taglist, call gst_tag_list_unref() on it.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the new #GstTagList</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="taglist" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="foreach" c:identifier="gst_tag_list_foreach">
<doc xml:space="preserve">Calls the given function for each tag inside the tag list. Note that if there
is no tag, the function won't be called at all.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to iterate over</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="call" closure="1">
<doc xml:space="preserve">function to be called for each tag</doc>
<type name="TagForeachFunc" c:type="GstTagForeachFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user specified data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="get_boolean" c:identifier="gst_tag_list_get_boolean">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="get_boolean_index" c:identifier="gst_tag_list_get_boolean_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gboolean" c:type="gboolean*"/>
</parameter>
</parameters>
</method>
<method name="get_date" c:identifier="gst_tag_list_get_date">
<doc xml:space="preserve">Copies the first date for the given tag in the taglist into the variable
pointed to by @value. Free the date with g_date_free() when it is no longer
needed.
Free-function: g_date_free</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a date was copied, %FALSE if the tag didn't exist in the
given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of a GDate pointer
variable to store the result into</doc>
<type name="GLib.Date" c:type="GDate**"/>
</parameter>
</parameters>
</method>
<method name="get_date_index" c:identifier="gst_tag_list_get_date_index">
<doc xml:space="preserve">Gets the date that is at the given index for the given tag in the given
list and copies it into the variable pointed to by @value. Free the date
with g_date_free() when it is no longer needed.
Free-function: g_date_free</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="GLib.Date" c:type="GDate**"/>
</parameter>
</parameters>
</method>
<method name="get_date_time" c:identifier="gst_tag_list_get_date_time">
<doc xml:space="preserve">Copies the first datetime for the given tag in the taglist into the variable
pointed to by @value. Unref the date with gst_date_time_unref() when
it is no longer needed.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a datetime was copied, %FALSE if the tag didn't exist in
the given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of a #GstDateTime
pointer variable to store the result into</doc>
<type name="DateTime" c:type="GstDateTime**"/>
</parameter>
</parameters>
</method>
<method name="get_date_time_index" c:identifier="gst_tag_list_get_date_time_index">
<doc xml:space="preserve">Gets the datetime that is at the given index for the given tag in the given
list and copies it into the variable pointed to by @value. Unref the datetime
with gst_date_time_unref() when it is no longer needed.
Free-function: gst_date_time_unref</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="DateTime" c:type="GstDateTime**"/>
</parameter>
</parameters>
</method>
<method name="get_double" c:identifier="gst_tag_list_get_double">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="get_double_index" c:identifier="gst_tag_list_get_double_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</method>
<method name="get_float" c:identifier="gst_tag_list_get_float">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gfloat" c:type="gfloat*"/>
</parameter>
</parameters>
</method>
<method name="get_float_index" c:identifier="gst_tag_list_get_float_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gfloat" c:type="gfloat*"/>
</parameter>
</parameters>
</method>
<method name="get_int" c:identifier="gst_tag_list_get_int">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_int64" c:identifier="gst_tag_list_get_int64">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="get_int64_index" c:identifier="gst_tag_list_get_int64_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="get_int_index" c:identifier="gst_tag_list_get_int_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_pointer" c:identifier="gst_tag_list_get_pointer">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="none" nullable="1">
<doc xml:space="preserve">location for the result</doc>
<type name="gpointer" c:type="gpointer*"/>
</parameter>
</parameters>
</method>
<method name="get_pointer_index" c:identifier="gst_tag_list_get_pointer_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="none" nullable="1">
<doc xml:space="preserve">location for the result</doc>
<type name="gpointer" c:type="gpointer*"/>
</parameter>
</parameters>
</method>
<method name="get_sample" c:identifier="gst_tag_list_get_sample">
<doc xml:space="preserve">Copies the first sample for the given tag in the taglist into the variable
pointed to by @sample. Free the sample with gst_sample_unref() when it is
no longer needed. You can retrieve the buffer from the sample using
gst_sample_get_buffer() and the associated caps (if any) with
gst_sample_get_caps().
Free-function: gst_sample_unref</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a sample was returned, %FALSE if the tag didn't exist in
the given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="sample" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of a GstSample
pointer variable to store the result into</doc>
<type name="Sample" c:type="GstSample**"/>
</parameter>
</parameters>
</method>
<method name="get_sample_index" c:identifier="gst_tag_list_get_sample_index">
<doc xml:space="preserve">Gets the sample that is at the given index for the given tag in the given
list and copies it into the variable pointed to by @sample. Free the sample
with gst_sample_unref() when it is no longer needed. You can retrieve the
buffer from the sample using gst_sample_get_buffer() and the associated
caps (if any) with gst_sample_get_caps().
Free-function: gst_sample_unref</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a sample was copied, %FALSE if the tag didn't exist in the
given list or if it was %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="sample" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">address of a GstSample
pointer variable to store the result into</doc>
<type name="Sample" c:type="GstSample**"/>
</parameter>
</parameters>
</method>
<method name="get_scope" c:identifier="gst_tag_list_get_scope">
<doc xml:space="preserve">Gets the scope of @list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The scope of @list</doc>
<type name="TagScope" c:type="GstTagScope"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_string" c:identifier="gst_tag_list_get_string">
<doc xml:space="preserve">Copies the contents for the given tag into the value, possibly merging
multiple values into one if multiple values are associated with the tag.
Use gst_tag_list_get_string_index (list, tag, 0, value) if you want
to retrieve the first string associated with this tag unmodified.
The resulting string in @value will be in UTF-8 encoding and should be
freed by the caller using g_free when no longer needed. The
returned string is also guaranteed to be non-%NULL and non-empty.
Free-function: g_free</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="get_string_index" c:identifier="gst_tag_list_get_string_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.
The resulting string in @value will be in UTF-8 encoding and should be
freed by the caller using g_free when no longer needed. The
returned string is also guaranteed to be non-%NULL and non-empty.
Free-function: g_free</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
</parameters>
</method>
<method name="get_tag_size" c:identifier="gst_tag_list_get_tag_size">
<doc xml:space="preserve">Checks how many value are stored in this tag list for the given tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of tags stored</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a taglist</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag to query</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_uint" c:identifier="gst_tag_list_get_uint">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="get_uint64" c:identifier="gst_tag_list_get_uint64">
<doc xml:space="preserve">Copies the contents for the given tag into the value, merging multiple values
into one if multiple values are associated with the tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="get_uint64_index" c:identifier="gst_tag_list_get_uint64_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="guint64" c:type="guint64*"/>
</parameter>
</parameters>
</method>
<method name="get_uint_index" c:identifier="gst_tag_list_get_uint_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">location for the result</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</method>
<method name="get_value_index" c:identifier="gst_tag_list_get_value_index">
<doc xml:space="preserve">Gets the value that is at the given index for the given tag in the given
list.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The GValue for the specified
entry or %NULL if the tag wasn't available or the tag
doesn't have as many entries</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="insert" c:identifier="gst_tag_list_insert">
<doc xml:space="preserve">Inserts the tags of the @from list into the first list using the given mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="into" transfer-ownership="none">
<doc xml:space="preserve">list to merge into</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="from" transfer-ownership="none">
<doc xml:space="preserve">list to merge from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
<method name="is_empty" c:identifier="gst_tag_list_is_empty">
<doc xml:space="preserve">Checks if the given taglist is empty.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the taglist is empty, otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">A #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_equal" c:identifier="gst_tag_list_is_equal">
<doc xml:space="preserve">Checks if the two given taglists are equal.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the taglists are equal, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list1" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="list2" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
</parameters>
</method>
<method name="merge" c:identifier="gst_tag_list_merge">
<doc xml:space="preserve">Merges the two given lists into a new list. If one of the lists is %NULL, a
copy of the other is returned. If both lists are %NULL, %NULL is returned.
Free-function: gst_tag_list_unref</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the new list</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="list1" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">first list to merge</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="list2" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">second list to merge</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
<method name="n_tags" c:identifier="gst_tag_list_n_tags">
<doc xml:space="preserve">Get the number of tags in @list.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The number of tags in @list.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">A #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="nth_tag_name" c:identifier="gst_tag_list_nth_tag_name">
<doc xml:space="preserve">Get the name of the tag in @list at @index.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The name of the tag at @index.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">A #GstTagList.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">the index</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="peek_string_index" c:identifier="gst_tag_list_peek_string_index">
<doc xml:space="preserve">Peeks at the value that is at the given index for the given tag in the given
list.
The resulting string in @value will be in UTF-8 encoding and doesn't need
to be freed by the caller. The returned string is also guaranteed to
be non-%NULL and non-empty.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was set, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">number of entry to read out</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="value" direction="out" caller-allocates="0" transfer-ownership="none">
<doc xml:space="preserve">location for the result</doc>
<type name="utf8" c:type="const gchar**"/>
</parameter>
</parameters>
</method>
<method name="ref" c:identifier="gst_tag_list_ref" introspectable="0">
<doc xml:space="preserve">Add a reference to a #GstTagList mini object.
From this point on, until the caller calls gst_tag_list_unref() or
gst_tag_list_make_writable(), it is guaranteed that the taglist object will
not change. To use a #GstTagList object, you must always have a refcount on
it -- either the one made implicitly by e.g. gst_tag_list_new(), or via
taking one explicitly with this function.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the same #GstTagList mini object.</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="taglist" transfer-ownership="none">
<doc xml:space="preserve">the #GstTagList to reference</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="remove_tag" c:identifier="gst_tag_list_remove_tag">
<doc xml:space="preserve">Removes the given tag from the taglist.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to remove tag from</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to remove</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_scope" c:identifier="gst_tag_list_set_scope">
<doc xml:space="preserve">Sets the scope of @list to @scope. By default the scope
of a taglist is stream scope.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
<parameter name="scope" transfer-ownership="none">
<doc xml:space="preserve">new scope for @list</doc>
<type name="TagScope" c:type="GstTagScope"/>
</parameter>
</parameters>
</method>
<method name="to_string" c:identifier="gst_tag_list_to_string">
<doc xml:space="preserve">Serializes a tag list to a string.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly-allocated string, or %NULL in case of
an error. The string must be freed with g_free() when no longer
needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList</doc>
<type name="TagList" c:type="const GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<method name="unref" c:identifier="gst_tag_list_unref" introspectable="0">
<doc xml:space="preserve">Unref a #GstTagList, and and free all its memory when the refcount reaches 0.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="taglist" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagList.</doc>
<type name="TagList" c:type="GstTagList*"/>
</instance-parameter>
</parameters>
</method>
<function name="copy_value" c:identifier="gst_tag_list_copy_value">
<doc xml:space="preserve">Copies the contents for the given tag into the value,
merging multiple values into one if multiple values are associated
with the tag.
You must g_value_unset() the value after use.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">uninitialized #GValue to copy into</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
</record>
<callback name="TagMergeFunc" c:type="GstTagMergeFunc">
<doc xml:space="preserve">A function for merging multiple values of a tag used when registering
tags.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the destination #GValue</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the source #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</callback>
<enumeration name="TagMergeMode" glib:type-name="GstTagMergeMode" glib:get-type="gst_tag_merge_mode_get_type" c:type="GstTagMergeMode">
<doc xml:space="preserve">The different tag merging modes are basically replace, overwrite and append,
but they can be seen from two directions. Given two taglists: (A) the tags
already in the element and (B) the ones that are supplied to the element (
e.g. via gst_tag_setter_merge_tags() / gst_tag_setter_add_tags() or a
%GST_EVENT_TAG), how are these tags merged?
In the table below this is shown for the cases that a tag exists in the list
(A) or does not exists (!A) and combinations thereof.
| merge mode | A + B | A + !B | !A + B | !A + !B |
| ----------- | ----- | ------ | ------ | ------- |
| REPLACE_ALL | B | &#xF8; | B | &#xF8; |
| REPLACE | B | A | B | &#xF8; |
| APPEND | A, B | A | B | &#xF8; |
| PREPEND | B, A | A | B | &#xF8; |
| KEEP | A | A | B | &#xF8; |
| KEEP_ALL | A | A | &#xF8; | &#xF8; |</doc>
<member name="undefined" value="0" c:identifier="GST_TAG_MERGE_UNDEFINED" glib:nick="undefined">
<doc xml:space="preserve">undefined merge mode</doc>
</member>
<member name="replace_all" value="1" c:identifier="GST_TAG_MERGE_REPLACE_ALL" glib:nick="replace-all">
<doc xml:space="preserve">replace all tags (clear list and append)</doc>
</member>
<member name="replace" value="2" c:identifier="GST_TAG_MERGE_REPLACE" glib:nick="replace">
<doc xml:space="preserve">replace tags</doc>
</member>
<member name="append" value="3" c:identifier="GST_TAG_MERGE_APPEND" glib:nick="append">
<doc xml:space="preserve">append tags</doc>
</member>
<member name="prepend" value="4" c:identifier="GST_TAG_MERGE_PREPEND" glib:nick="prepend">
<doc xml:space="preserve">prepend tags</doc>
</member>
<member name="keep" value="5" c:identifier="GST_TAG_MERGE_KEEP" glib:nick="keep">
<doc xml:space="preserve">keep existing tags</doc>
</member>
<member name="keep_all" value="6" c:identifier="GST_TAG_MERGE_KEEP_ALL" glib:nick="keep-all">
<doc xml:space="preserve">keep all existing tags</doc>
</member>
<member name="count" value="7" c:identifier="GST_TAG_MERGE_COUNT" glib:nick="count">
<doc xml:space="preserve">the number of merge modes</doc>
</member>
</enumeration>
<enumeration name="TagScope" glib:type-name="GstTagScope" glib:get-type="gst_tag_scope_get_type" c:type="GstTagScope">
<doc xml:space="preserve">GstTagScope specifies if a taglist applies to the complete
medium or only to one single stream.</doc>
<member name="stream" value="0" c:identifier="GST_TAG_SCOPE_STREAM" glib:nick="stream">
<doc xml:space="preserve">tags specific to this single stream</doc>
</member>
<member name="global" value="1" c:identifier="GST_TAG_SCOPE_GLOBAL" glib:nick="global">
<doc xml:space="preserve">global tags for the complete medium</doc>
</member>
</enumeration>
<interface name="TagSetter" c:symbol-prefix="tag_setter" c:type="GstTagSetter" glib:type-name="GstTagSetter" glib:get-type="gst_tag_setter_get_type" glib:type-struct="TagSetterInterface">
<doc xml:space="preserve">Element interface that allows setting of media metadata.
Elements that support changing a stream's metadata will implement this
interface. Examples of such elements are 'vorbisenc', 'theoraenc' and
'id3v2mux'.
If you just want to retrieve metadata in your application then all you
need to do is watch for tag messages on your pipeline's bus. This
interface is only for setting metadata, not for extracting it. To set tags
from the application, find tagsetter elements and set tags using e.g.
gst_tag_setter_merge_tags() or gst_tag_setter_add_tags(). Also consider
setting the #GstTagMergeMode that is used for tag events that arrive at the
tagsetter element (default mode is to keep existing tags).
The application should do that before the element goes to %GST_STATE_PAUSED.
Elements implementing the #GstTagSetter interface often have to merge
any tags received from upstream and the tags set by the application via
the interface. This can be done like this:
|[&lt;!-- language="C" --&gt;
GstTagMergeMode merge_mode;
const GstTagList *application_tags;
const GstTagList *event_tags;
GstTagSetter *tagsetter;
GstTagList *result;
tagsetter = GST_TAG_SETTER (element);
merge_mode = gst_tag_setter_get_tag_merge_mode (tagsetter);
application_tags = gst_tag_setter_get_tag_list (tagsetter);
event_tags = (const GstTagList *) element-&gt;event_tags;
GST_LOG_OBJECT (tagsetter, "merging tags, merge mode = %d", merge_mode);
GST_LOG_OBJECT (tagsetter, "event tags: %" GST_PTR_FORMAT, event_tags);
GST_LOG_OBJECT (tagsetter, "set tags: %" GST_PTR_FORMAT, application_tags);
result = gst_tag_list_merge (application_tags, event_tags, merge_mode);
GST_LOG_OBJECT (tagsetter, "final tags: %" GST_PTR_FORMAT, result);
]|</doc>
<prerequisite name="Element"/>
<method name="add_tag_valist" c:identifier="gst_tag_setter_add_tag_valist" introspectable="0">
<doc xml:space="preserve">Adds the given tag / value pairs on the setter using the given merge mode.
The list must be terminated with %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">tag / value pairs to set</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="add_tag_valist_values" c:identifier="gst_tag_setter_add_tag_valist_values" introspectable="0">
<doc xml:space="preserve">Adds the given tag / GValue pairs on the setter using the given merge mode.
The list must be terminated with %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="var_args" transfer-ownership="none">
<doc xml:space="preserve">tag / GValue pairs to set</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</method>
<method name="add_tag_value" c:identifier="gst_tag_setter_add_tag_value">
<doc xml:space="preserve">Adds the given tag / GValue pair on the setter using the given merge mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">GValue to set for the tag</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</method>
<method name="add_tag_values" c:identifier="gst_tag_setter_add_tag_values" introspectable="0">
<doc xml:space="preserve">Adds the given tag / GValue pairs on the setter using the given merge mode.
The list must be terminated with %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">more tag / GValue pairs to set</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="add_tags" c:identifier="gst_tag_setter_add_tags" introspectable="0">
<doc xml:space="preserve">Adds the given tag / value pairs on the setter using the given merge mode.
The list must be terminated with %NULL.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to use</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">more tag / value pairs to set</doc>
<varargs/>
</parameter>
</parameters>
</method>
<method name="get_tag_list" c:identifier="gst_tag_setter_get_tag_list">
<doc xml:space="preserve">Returns the current list of tags the setter uses. The list should not be
modified or freed.
This function is not thread-safe.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a current snapshot of the
taglist used in the setter or %NULL if none is used.</doc>
<type name="TagList" c:type="const GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_tag_merge_mode" c:identifier="gst_tag_setter_get_tag_merge_mode">
<doc xml:space="preserve">Queries the mode by which tags inside the setter are overwritten by tags
from events</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the merge mode used inside the element.</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
</parameters>
</method>
<method name="merge_tags" c:identifier="gst_tag_setter_merge_tags">
<doc xml:space="preserve">Merges the given list into the setter's list using the given mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">a tag list to merge from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the mode to merge with</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
<method name="reset_tags" c:identifier="gst_tag_setter_reset_tags">
<doc xml:space="preserve">Reset the internal taglist. Elements should call this from within the
state-change handler.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_tag_merge_mode" c:identifier="gst_tag_setter_set_tag_merge_mode">
<doc xml:space="preserve">Sets the given merge mode that is used for adding tags from events to tags
specified by this interface. The default is #GST_TAG_MERGE_KEEP, which keeps
the tags set with this interface and discards tags from events.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTagSetter</doc>
<type name="TagSetter" c:type="GstTagSetter*"/>
</instance-parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">The mode with which tags are added</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
</interface>
<record name="TagSetterInterface" c:type="GstTagSetterInterface" glib:is-gtype-struct-for="TagSetter">
<doc xml:space="preserve">#GstTagSetterInterface interface.</doc>
<field name="g_iface">
<doc xml:space="preserve">parent interface type.</doc>
<type name="GObject.TypeInterface" c:type="GTypeInterface"/>
</field>
</record>
<class name="Task" c:symbol-prefix="task" c:type="GstTask" parent="Object" glib:type-name="GstTask" glib:get-type="gst_task_get_type" glib:type-struct="TaskClass">
<doc xml:space="preserve">#GstTask is used by #GstElement and #GstPad to provide the data passing
threads in a #GstPipeline.
A #GstPad will typically start a #GstTask to push or pull data to/from the
peer pads. Most source elements start a #GstTask to push data. In some cases
a demuxer element can start a #GstTask to pull data from a peer element. This
is typically done when the demuxer can perform random access on the upstream
peer element for improved performance.
Although convenience functions exist on #GstPad to start/pause/stop tasks, it
might sometimes be needed to create a #GstTask manually if it is not related to
a #GstPad.
Before the #GstTask can be run, it needs a #GRecMutex that can be set with
gst_task_set_lock().
The task can be started, paused and stopped with gst_task_start(), gst_task_pause()
and gst_task_stop() respectively or with the gst_task_set_state() function.
A #GstTask will repeatedly call the #GstTaskFunction with the user data
that was provided when creating the task with gst_task_new(). While calling
the function it will acquire the provided lock. The provided lock is released
when the task pauses or stops.
Stopping a task with gst_task_stop() will not immediately make sure the task is
not running anymore. Use gst_task_join() to make sure the task is completely
stopped and the thread is stopped.
After creating a #GstTask, use gst_object_unref() to free its resources. This can
only be done when the task is not running anymore.
Task functions can send a #GstMessage to send out-of-band data to the
application. The application can receive messages from the #GstBus in its
mainloop.
For debugging purposes, the task will configure its object name as the thread
name on Linux. Please note that the object name should be configured before the
task is started; changing the object name after the task has been started, has
no effect on the thread name.</doc>
<constructor name="new" c:identifier="gst_task_new">
<doc xml:space="preserve">Create a new Task that will repeatedly call the provided @func
with @user_data as a parameter. Typically the task will run in
a new thread.
The function cannot be changed after the task has been created. You
must create a new #GstTask to change the function.
This function will not yet create and start a thread. Use gst_task_start() or
gst_task_pause() to create and start the GThread.
Before the task can be used, a #GRecMutex must be configured using the
gst_task_set_lock() function. This lock will always be acquired while
@func is called.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A new #GstTask.
MT safe.</doc>
<type name="Task" c:type="GstTask*"/>
</return-value>
<parameters>
<parameter name="func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">The #GstTaskFunction to use</doc>
<type name="TaskFunction" c:type="GstTaskFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">User data to pass to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">the function to call when @user_data is no longer needed.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</constructor>
<function name="cleanup_all" c:identifier="gst_task_cleanup_all">
<doc xml:space="preserve">Wait for all tasks to be stopped. This is mainly used internally
to ensure proper cleanup of internal data structures in test suites.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</function>
<method name="get_pool" c:identifier="gst_task_get_pool">
<doc xml:space="preserve">Get the #GstTaskPool that this task will use for its streaming
threads.
MT safe.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstTaskPool used by @task. gst_object_unref()
after usage.</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">a #GstTask</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_state" c:identifier="gst_task_get_state">
<doc xml:space="preserve">Get the current state of the task.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstTaskState of the task
MT safe.</doc>
<type name="TaskState" c:type="GstTaskState"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to query</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="join" c:identifier="gst_task_join">
<doc xml:space="preserve">Joins @task. After this call, it is safe to unref the task
and clean up the lock set with gst_task_set_lock().
The task will automatically be stopped with this call.
This function cannot be called from within a task function as this
would cause a deadlock. The function will detect this and print a
g_warning.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the task could be joined.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to join</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="pause" c:identifier="gst_task_pause">
<doc xml:space="preserve">Pauses @task. This method can also be called on a task in the
stopped state, in which case a thread will be started and will remain
in the paused state. This function does not wait for the task to complete
the paused state.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the task could be paused.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to pause</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="resume" c:identifier="gst_task_resume" version="1.18">
<doc xml:space="preserve">Resume @task in case it was paused. If the task was stopped, it will
remain in that state and this function will return %FALSE.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the task could be resumed.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to resume</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_enter_callback" c:identifier="gst_task_set_enter_callback">
<doc xml:space="preserve">Call @enter_func when the task function of @task is entered. @user_data will
be passed to @enter_func and @notify will be called when @user_data is no
longer referenced.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to use</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
<parameter name="enter_func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">a #GstTaskThreadFunc</doc>
<type name="TaskThreadFunc" c:type="GstTaskThreadFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @enter_func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">called when @user_data is no longer referenced</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_leave_callback" c:identifier="gst_task_set_leave_callback">
<doc xml:space="preserve">Call @leave_func when the task function of @task is left. @user_data will
be passed to @leave_func and @notify will be called when @user_data is no
longer referenced.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to use</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
<parameter name="leave_func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">a #GstTaskThreadFunc</doc>
<type name="TaskThreadFunc" c:type="GstTaskThreadFunc"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data passed to @leave_func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">called when @user_data is no longer referenced</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</method>
<method name="set_lock" c:identifier="gst_task_set_lock">
<doc xml:space="preserve">Set the mutex used by the task. The mutex will be acquired before
calling the #GstTaskFunction.
This function has to be called before calling gst_task_pause() or
gst_task_start().
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to use</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
<parameter name="mutex" transfer-ownership="none">
<doc xml:space="preserve">The #GRecMutex to use</doc>
<type name="GLib.RecMutex" c:type="GRecMutex*"/>
</parameter>
</parameters>
</method>
<method name="set_pool" c:identifier="gst_task_set_pool">
<doc xml:space="preserve">Set @pool as the new GstTaskPool for @task. Any new streaming threads that
will be created by @task will now use @pool.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">a #GstTask</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</parameter>
</parameters>
</method>
<method name="set_state" c:identifier="gst_task_set_state">
<doc xml:space="preserve">Sets the state of @task to @state.
The @task must have a lock associated with it using
gst_task_set_lock() when going to GST_TASK_STARTED or GST_TASK_PAUSED or
this function will return %FALSE.
MT safe.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the state could be changed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">a #GstTask</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
<parameter name="state" transfer-ownership="none">
<doc xml:space="preserve">the new task state</doc>
<type name="TaskState" c:type="GstTaskState"/>
</parameter>
</parameters>
</method>
<method name="start" c:identifier="gst_task_start">
<doc xml:space="preserve">Starts @task. The @task must have a lock associated with it using
gst_task_set_lock() or this function will return %FALSE.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the task could be started.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to start</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<method name="stop" c:identifier="gst_task_stop">
<doc xml:space="preserve">Stops @task. This method merely schedules the task to stop and
will not wait for the task to have completely stopped. Use
gst_task_join() to stop and wait for completion.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the task could be stopped.
MT safe.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask to stop</doc>
<type name="Task" c:type="GstTask*"/>
</instance-parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="state">
<doc xml:space="preserve">the state of the task</doc>
<type name="TaskState" c:type="GstTaskState"/>
</field>
<field name="cond">
<doc xml:space="preserve">used to pause/resume the task</doc>
<type name="GLib.Cond" c:type="GCond"/>
</field>
<field name="lock">
<doc xml:space="preserve">The lock taken when iterating the task function</doc>
<type name="GLib.RecMutex" c:type="GRecMutex*"/>
</field>
<field name="func">
<doc xml:space="preserve">the function executed by this task</doc>
<type name="TaskFunction" c:type="GstTaskFunction"/>
</field>
<field name="user_data">
<doc xml:space="preserve">user_data passed to the task function</doc>
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="notify">
<doc xml:space="preserve">GDestroyNotify for @user_data</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</field>
<field name="running">
<doc xml:space="preserve">a flag indicating that the task is running</doc>
<type name="gboolean" c:type="gboolean"/>
</field>
<field name="thread" readable="0" private="1">
<type name="GLib.Thread" c:type="GThread*"/>
</field>
<field name="priv" readable="0" private="1">
<type name="TaskPrivate" c:type="GstTaskPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="TaskClass" c:type="GstTaskClass" glib:is-gtype-struct-for="Task">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="pool" readable="0" private="1">
<type name="TaskPool" c:type="GstTaskPool*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<callback name="TaskFunction" c:type="GstTaskFunction">
<doc xml:space="preserve">A function that will repeatedly be called in the thread created by
a #GstTask.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="0">
<doc xml:space="preserve">user data passed to the function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<class name="TaskPool" c:symbol-prefix="task_pool" c:type="GstTaskPool" parent="Object" glib:type-name="GstTaskPool" glib:get-type="gst_task_pool_get_type" glib:type-struct="TaskPoolClass">
<doc xml:space="preserve">This object provides an abstraction for creating threads. The default
implementation uses a regular GThreadPool to start tasks.
Subclasses can be made to create custom threads.</doc>
<constructor name="new" c:identifier="gst_task_pool_new">
<doc xml:space="preserve">Create a new default task pool. The default task pool will use a regular
GThreadPool for threads.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstTaskPool. gst_object_unref() after usage.</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</return-value>
</constructor>
<virtual-method name="cleanup" invoker="cleanup">
<doc xml:space="preserve">Wait for all tasks to be stopped. This is mainly used internally
to ensure proper cleanup of internal data structures in test suites.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="join" invoker="join">
<doc xml:space="preserve">Join a task and/or return it to the pool. @id is the id obtained from
gst_task_pool_push().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
<parameter name="id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the id</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</virtual-method>
<virtual-method name="prepare" invoker="prepare" throws="1">
<doc xml:space="preserve">Prepare the taskpool for accepting gst_task_pool_push() operations.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="push" invoker="push" throws="1">
<doc xml:space="preserve">Start the execution of a new thread from @pool.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer that should be used
for the gst_task_pool_join function. This pointer can be %NULL, you
must check @error to detect errors.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="async" closure="1">
<doc xml:space="preserve">the function to call</doc>
<type name="TaskPoolFunction" c:type="GstTaskPoolFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">data to pass to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</virtual-method>
<method name="cleanup" c:identifier="gst_task_pool_cleanup">
<doc xml:space="preserve">Wait for all tasks to be stopped. This is mainly used internally
to ensure proper cleanup of internal data structures in test suites.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
</parameters>
</method>
<method name="join" c:identifier="gst_task_pool_join">
<doc xml:space="preserve">Join a task and/or return it to the pool. @id is the id obtained from
gst_task_pool_push().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
<parameter name="id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the id</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<method name="prepare" c:identifier="gst_task_pool_prepare" throws="1">
<doc xml:space="preserve">Prepare the taskpool for accepting gst_task_pool_push() operations.
MT safe.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
</parameters>
</method>
<method name="push" c:identifier="gst_task_pool_push" throws="1">
<doc xml:space="preserve">Start the execution of a new thread from @pool.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer that should be used
for the gst_task_pool_join function. This pointer can be %NULL, you
must check @error to detect errors.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<instance-parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</instance-parameter>
<parameter name="func" transfer-ownership="none" scope="async" closure="1">
<doc xml:space="preserve">the function to call</doc>
<type name="TaskPoolFunction" c:type="GstTaskPoolFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">data to pass to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</method>
<field name="object">
<type name="Object" c:type="GstObject"/>
</field>
<field name="pool" readable="0" private="1">
<type name="GLib.ThreadPool" c:type="GThreadPool*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="TaskPoolClass" c:type="GstTaskPoolClass" glib:is-gtype-struct-for="TaskPool">
<doc xml:space="preserve">The #GstTaskPoolClass object.</doc>
<field name="parent_class">
<doc xml:space="preserve">the parent class structure</doc>
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="prepare">
<callback name="prepare" throws="1">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="cleanup">
<callback name="cleanup">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="push">
<callback name="push" throws="1">
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a pointer that should be used
for the gst_task_pool_join function. This pointer can be %NULL, you
must check @error to detect errors.</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="async" closure="2">
<doc xml:space="preserve">the function to call</doc>
<type name="TaskPoolFunction" c:type="GstTaskPoolFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">data to pass to @func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
</field>
<field name="join">
<callback name="join">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="pool" transfer-ownership="none">
<doc xml:space="preserve">a #GstTaskPool</doc>
<type name="TaskPool" c:type="GstTaskPool*"/>
</parameter>
<parameter name="id" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the id</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<callback name="TaskPoolFunction" c:type="GstTaskPoolFunction">
<doc xml:space="preserve">Task function, see gst_task_pool_push().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="0">
<doc xml:space="preserve">user data for the task function</doc>
<type name="gpointer" c:type="void*"/>
</parameter>
</parameters>
</callback>
<record name="TaskPrivate" c:type="GstTaskPrivate" disguised="1"/>
<enumeration name="TaskState" glib:type-name="GstTaskState" glib:get-type="gst_task_state_get_type" c:type="GstTaskState">
<doc xml:space="preserve">The different states a task can be in</doc>
<member name="started" value="0" c:identifier="GST_TASK_STARTED" glib:nick="started">
<doc xml:space="preserve">the task is started and running</doc>
</member>
<member name="stopped" value="1" c:identifier="GST_TASK_STOPPED" glib:nick="stopped">
<doc xml:space="preserve">the task is stopped</doc>
</member>
<member name="paused" value="2" c:identifier="GST_TASK_PAUSED" glib:nick="paused">
<doc xml:space="preserve">the task is paused</doc>
</member>
</enumeration>
<callback name="TaskThreadFunc" c:type="GstTaskThreadFunc">
<doc xml:space="preserve">Custom GstTask thread callback functions that can be installed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="task" transfer-ownership="none">
<doc xml:space="preserve">The #GstTask</doc>
<type name="Task" c:type="GstTask*"/>
</parameter>
<parameter name="thread" transfer-ownership="none">
<doc xml:space="preserve">The #GThread</doc>
<type name="GLib.Thread" c:type="GThread*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="2">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<record name="TimedValue" c:type="GstTimedValue">
<doc xml:space="preserve">Structure for saving a timestamp and a value.</doc>
<field name="timestamp" writable="1">
<doc xml:space="preserve">timestamp of the value change</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</field>
<field name="value" writable="1">
<doc xml:space="preserve">the corresponding value</doc>
<type name="gdouble" c:type="gdouble"/>
</field>
</record>
<record name="Toc" c:type="GstToc" glib:type-name="GstToc" glib:get-type="gst_toc_get_type" c:symbol-prefix="toc">
<doc xml:space="preserve">#GstToc functions are used to create/free #GstToc and #GstTocEntry structures.
Also they are used to convert #GstToc into #GstStructure and vice versa.
#GstToc lets you to inform other elements in pipeline or application that playing
source has some kind of table of contents (TOC). These may be chapters, editions,
angles or other types. For example: DVD chapters, Matroska chapters or cue sheet
TOC. Such TOC will be useful for applications to display instead of just a
playlist.
Using TOC is very easy. Firstly, create #GstToc structure which represents root
contents of the source. You can also attach TOC-specific tags to it. Then fill
it with #GstTocEntry entries by appending them to the #GstToc using
gst_toc_append_entry(), and appending subentries to a #GstTocEntry using
gst_toc_entry_append_sub_entry().
Note that root level of the TOC can contain only either editions or chapters. You
should not mix them together at the same level. Otherwise you will get serialization
/deserialization errors. Make sure that no one of the entries has negative start and
stop values.
Use gst_event_new_toc() to create a new TOC #GstEvent, and gst_event_parse_toc() to
parse received TOC event. Use gst_event_new_toc_select() to create a new TOC select #GstEvent,
and gst_event_parse_toc_select() to parse received TOC select event. The same rule for
the #GstMessage: gst_message_new_toc() to create new TOC #GstMessage, and
gst_message_parse_toc() to parse received TOC message.
TOCs can have global scope or current scope. Global scope TOCs contain
all entries that can possibly be selected using a toc select event, and
are what an application is usually interested in. TOCs with current scope
only contain the parts of the TOC relevant to the currently selected/playing
stream; the current scope TOC is used by downstream elements such as muxers
to write correct TOC entries when transcoding files, for example. When
playing a DVD, the global TOC would contain a hierarchy of all titles,
chapters and angles, for example, while the current TOC would only contain
the chapters for the currently playing title if playback of a specific
title was requested.
Applications and plugins should not rely on TOCs having a certain kind of
structure, but should allow for different alternatives. For example, a
simple CUE sheet embedded in a file may be presented as a flat list of
track entries, or could have a top-level edition node (or some other
alternative type entry) with track entries underneath that node; or even
multiple top-level edition nodes (or some other alternative type entries)
each with track entries underneath, in case the source file has extracted
a track listing from different sources).</doc>
<constructor name="new" c:identifier="gst_toc_new">
<doc xml:space="preserve">Create a new #GstToc structure.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">newly allocated #GstToc structure, free it
with gst_toc_unref().</doc>
<type name="Toc" c:type="GstToc*"/>
</return-value>
<parameters>
<parameter name="scope" transfer-ownership="none">
<doc xml:space="preserve">scope of this TOC</doc>
<type name="TocScope" c:type="GstTocScope"/>
</parameter>
</parameters>
</constructor>
<method name="append_entry" c:identifier="gst_toc_append_entry">
<doc xml:space="preserve">Appends the #GstTocEntry @entry to @toc.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">A #GstToc instance</doc>
<type name="Toc" c:type="GstToc*"/>
</instance-parameter>
<parameter name="entry" transfer-ownership="full">
<doc xml:space="preserve">A #GstTocEntry</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</parameter>
</parameters>
</method>
<method name="dump" c:identifier="gst_toc_dump">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<type name="Toc" c:type="GstToc*"/>
</instance-parameter>
</parameters>
</method>
<method name="find_entry" c:identifier="gst_toc_find_entry">
<doc xml:space="preserve">Find #GstTocEntry with given @uid in the @toc.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">#GstTocEntry with specified
@uid from the @toc, or %NULL if not found.</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">#GstToc to search in.</doc>
<type name="Toc" c:type="const GstToc*"/>
</instance-parameter>
<parameter name="uid" transfer-ownership="none">
<doc xml:space="preserve">UID to find #GstTocEntry with.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_entries" c:identifier="gst_toc_get_entries">
<doc xml:space="preserve">Gets the list of #GstTocEntry of @toc.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A #GList of #GstTocEntry for @entry</doc>
<type name="GLib.List" c:type="GList*">
<type name="TocEntry"/>
</type>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">A #GstToc instance</doc>
<type name="Toc" c:type="const GstToc*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_scope" c:identifier="gst_toc_get_scope">
<return-value transfer-ownership="none">
<doc xml:space="preserve">scope of @toc</doc>
<type name="TocScope" c:type="GstTocScope"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">a #GstToc instance</doc>
<type name="Toc" c:type="const GstToc*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_tags" c:identifier="gst_toc_get_tags">
<doc xml:space="preserve">Gets the tags for @toc.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A #GstTagList for @entry</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">A #GstToc instance</doc>
<type name="Toc" c:type="const GstToc*"/>
</instance-parameter>
</parameters>
</method>
<method name="merge_tags" c:identifier="gst_toc_merge_tags">
<doc xml:space="preserve">Merge @tags into the existing tags of @toc using @mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">A #GstToc instance</doc>
<type name="Toc" c:type="GstToc*"/>
</instance-parameter>
<parameter name="tags" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstTagList or %NULL</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">A #GstTagMergeMode</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
<method name="set_tags" c:identifier="gst_toc_set_tags">
<doc xml:space="preserve">Set a #GstTagList with tags for the complete @toc.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="toc" transfer-ownership="none">
<doc xml:space="preserve">A #GstToc instance</doc>
<type name="Toc" c:type="GstToc*"/>
</instance-parameter>
<parameter name="tags" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstTagList or %NULL</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
</parameters>
</method>
</record>
<record name="TocEntry" c:type="GstTocEntry" glib:type-name="GstTocEntry" glib:get-type="gst_toc_entry_get_type" c:symbol-prefix="toc_entry">
<constructor name="new" c:identifier="gst_toc_entry_new">
<doc xml:space="preserve">Create new #GstTocEntry structure.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">newly allocated #GstTocEntry structure, free it with gst_toc_entry_unref().</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">entry type.</doc>
<type name="TocEntryType" c:type="GstTocEntryType"/>
</parameter>
<parameter name="uid" transfer-ownership="none">
<doc xml:space="preserve">unique ID (UID) in the whole TOC.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<method name="append_sub_entry" c:identifier="gst_toc_entry_append_sub_entry">
<doc xml:space="preserve">Appends the #GstTocEntry @subentry to @entry.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
<parameter name="subentry" transfer-ownership="full">
<doc xml:space="preserve">A #GstTocEntry</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</parameter>
</parameters>
</method>
<method name="get_entry_type" c:identifier="gst_toc_entry_get_entry_type">
<return-value transfer-ownership="none">
<doc xml:space="preserve">@entry's entry type</doc>
<type name="TocEntryType" c:type="GstTocEntryType"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocEntry</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_loop" c:identifier="gst_toc_entry_get_loop" version="1.4">
<doc xml:space="preserve">Get @loop_type and @repeat_count values from the @entry and write them into
appropriate storages. Loops are e.g. used by sampled instruments. GStreamer
is not automatically applying the loop. The application can process this
meta data and use it e.g. to send a seek-event to loop a section.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if all non-%NULL storage pointers were filled with appropriate
values, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">#GstTocEntry to get values from.</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
<parameter name="loop_type" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the loop_type
value, leave %NULL if not need.</doc>
<type name="TocLoopType" c:type="GstTocLoopType*"/>
</parameter>
<parameter name="repeat_count" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the repeat_count
value, leave %NULL if not need.</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</method>
<method name="get_parent" c:identifier="gst_toc_entry_get_parent">
<doc xml:space="preserve">Gets the parent #GstTocEntry of @entry.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The parent #GstTocEntry of @entry</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_start_stop_times" c:identifier="gst_toc_entry_get_start_stop_times">
<doc xml:space="preserve">Get @start and @stop values from the @entry and write them into appropriate
storages.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if all non-%NULL storage pointers were filled with appropriate
values, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">#GstTocEntry to get values from.</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
<parameter name="start" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the start value, leave
%NULL if not need.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
<parameter name="stop" direction="out" caller-allocates="0" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">the storage for the stop value, leave
%NULL if not need.</doc>
<type name="gint64" c:type="gint64*"/>
</parameter>
</parameters>
</method>
<method name="get_sub_entries" c:identifier="gst_toc_entry_get_sub_entries">
<doc xml:space="preserve">Gets the sub-entries of @entry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A #GList of #GstTocEntry of @entry</doc>
<type name="GLib.List" c:type="GList*">
<type name="TocEntry"/>
</type>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_tags" c:identifier="gst_toc_entry_get_tags">
<doc xml:space="preserve">Gets the tags for @entry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A #GstTagList for @entry</doc>
<type name="TagList" c:type="GstTagList*"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_toc" c:identifier="gst_toc_entry_get_toc">
<doc xml:space="preserve">Gets the parent #GstToc of @entry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The parent #GstToc of @entry</doc>
<type name="Toc" c:type="GstToc*"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_uid" c:identifier="gst_toc_entry_get_uid">
<doc xml:space="preserve">Gets the UID of @entry.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The UID of @entry</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_alternative" c:identifier="gst_toc_entry_is_alternative">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @entry's type is an alternative type, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocEntry</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_sequence" c:identifier="gst_toc_entry_is_sequence">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @entry's type is a sequence type, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocEntry</doc>
<type name="TocEntry" c:type="const GstTocEntry*"/>
</instance-parameter>
</parameters>
</method>
<method name="merge_tags" c:identifier="gst_toc_entry_merge_tags">
<doc xml:space="preserve">Merge @tags into the existing tags of @entry using @mode.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
<parameter name="tags" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstTagList or %NULL</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">A #GstTagMergeMode</doc>
<type name="TagMergeMode" c:type="GstTagMergeMode"/>
</parameter>
</parameters>
</method>
<method name="set_loop" c:identifier="gst_toc_entry_set_loop" version="1.4">
<doc xml:space="preserve">Set @loop_type and @repeat_count values for the @entry.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">#GstTocEntry to set values.</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
<parameter name="loop_type" transfer-ownership="none">
<doc xml:space="preserve">loop_type value to set.</doc>
<type name="TocLoopType" c:type="GstTocLoopType"/>
</parameter>
<parameter name="repeat_count" transfer-ownership="none">
<doc xml:space="preserve">repeat_count value to set.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</method>
<method name="set_start_stop_times" c:identifier="gst_toc_entry_set_start_stop_times">
<doc xml:space="preserve">Set @start and @stop values for the @entry.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">#GstTocEntry to set values.</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">start value to set.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="stop" transfer-ownership="none">
<doc xml:space="preserve">stop value to set.</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</method>
<method name="set_tags" c:identifier="gst_toc_entry_set_tags">
<doc xml:space="preserve">Set a #GstTagList with tags for the complete @entry.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="entry" transfer-ownership="none">
<doc xml:space="preserve">A #GstTocEntry instance</doc>
<type name="TocEntry" c:type="GstTocEntry*"/>
</instance-parameter>
<parameter name="tags" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstTagList or %NULL</doc>
<type name="TagList" c:type="GstTagList*"/>
</parameter>
</parameters>
</method>
</record>
<enumeration name="TocEntryType" glib:type-name="GstTocEntryType" glib:get-type="gst_toc_entry_type_get_type" c:type="GstTocEntryType">
<doc xml:space="preserve">The different types of TOC entries (see #GstTocEntry).
There are two types of TOC entries: alternatives or parts in a sequence.</doc>
<member name="angle" value="-3" c:identifier="GST_TOC_ENTRY_TYPE_ANGLE" glib:nick="angle">
<doc xml:space="preserve">entry is an angle (i.e. an alternative)</doc>
</member>
<member name="version" value="-2" c:identifier="GST_TOC_ENTRY_TYPE_VERSION" glib:nick="version">
<doc xml:space="preserve">entry is a version (i.e. alternative)</doc>
</member>
<member name="edition" value="-1" c:identifier="GST_TOC_ENTRY_TYPE_EDITION" glib:nick="edition">
<doc xml:space="preserve">entry is an edition (i.e. alternative)</doc>
</member>
<member name="invalid" value="0" c:identifier="GST_TOC_ENTRY_TYPE_INVALID" glib:nick="invalid">
<doc xml:space="preserve">invalid entry type value</doc>
</member>
<member name="title" value="1" c:identifier="GST_TOC_ENTRY_TYPE_TITLE" glib:nick="title">
<doc xml:space="preserve">entry is a title (i.e. a part of a sequence)</doc>
</member>
<member name="track" value="2" c:identifier="GST_TOC_ENTRY_TYPE_TRACK" glib:nick="track">
<doc xml:space="preserve">entry is a track (i.e. a part of a sequence)</doc>
</member>
<member name="chapter" value="3" c:identifier="GST_TOC_ENTRY_TYPE_CHAPTER" glib:nick="chapter">
<doc xml:space="preserve">entry is a chapter (i.e. a part of a sequence)</doc>
</member>
<function name="get_nick" c:identifier="gst_toc_entry_type_get_nick">
<doc xml:space="preserve">Converts @type to a string representation.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Returns a human-readable string for @type. This string is
only for debugging purpose and should not be displayed in a user
interface.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocEntryType.</doc>
<type name="TocEntryType" c:type="GstTocEntryType"/>
</parameter>
</parameters>
</function>
</enumeration>
<enumeration name="TocLoopType" version="1.4" glib:type-name="GstTocLoopType" glib:get-type="gst_toc_loop_type_get_type" c:type="GstTocLoopType">
<doc xml:space="preserve">How a #GstTocEntry should be repeated. By default, entries are played a
single time.</doc>
<member name="none" value="0" c:identifier="GST_TOC_LOOP_NONE" glib:nick="none">
<doc xml:space="preserve">single forward playback</doc>
</member>
<member name="forward" value="1" c:identifier="GST_TOC_LOOP_FORWARD" glib:nick="forward">
<doc xml:space="preserve">repeat forward</doc>
</member>
<member name="reverse" value="2" c:identifier="GST_TOC_LOOP_REVERSE" glib:nick="reverse">
<doc xml:space="preserve">repeat backward</doc>
</member>
<member name="ping_pong" value="3" c:identifier="GST_TOC_LOOP_PING_PONG" glib:nick="ping-pong">
<doc xml:space="preserve">repeat forward and backward</doc>
</member>
</enumeration>
<enumeration name="TocScope" glib:type-name="GstTocScope" glib:get-type="gst_toc_scope_get_type" c:type="GstTocScope">
<doc xml:space="preserve">The scope of a TOC.</doc>
<member name="global" value="1" c:identifier="GST_TOC_SCOPE_GLOBAL" glib:nick="global">
<doc xml:space="preserve">global TOC representing all selectable options
(this is what applications are usually interested in)</doc>
</member>
<member name="current" value="2" c:identifier="GST_TOC_SCOPE_CURRENT" glib:nick="current">
<doc xml:space="preserve">TOC for the currently active/selected stream
(this is a TOC representing the current stream from start to EOS,
and is what a TOC writer / muxer is usually interested in; it will
usually be a subset of the global TOC, e.g. just the chapters of
the current title, or the chapters selected for playback from the
current title)</doc>
</member>
</enumeration>
<interface name="TocSetter" c:symbol-prefix="toc_setter" c:type="GstTocSetter" glib:type-name="GstTocSetter" glib:get-type="gst_toc_setter_get_type" glib:type-struct="TocSetterInterface">
<doc xml:space="preserve">Element interface that allows setting of the TOC.
Elements that support some kind of chapters or editions (or tracks like in
the FLAC cue sheet) will implement this interface.
If you just want to retrieve the TOC in your application then all you
need to do is watch for TOC messages on your pipeline's bus (or you can
perform TOC query). This interface is only for setting TOC data, not for
extracting it. To set TOC from the application, find proper tocsetter element
and set TOC using gst_toc_setter_set_toc().
Elements implementing the #GstTocSetter interface can extend existing TOC
by getting extend UID for that (you can use gst_toc_find_entry() to retrieve it)
with any TOC entries received from downstream.</doc>
<prerequisite name="Element"/>
<method name="get_toc" c:identifier="gst_toc_setter_get_toc">
<doc xml:space="preserve">Return current TOC the setter uses. The TOC should not be
modified without making it writable first.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">TOC set, or %NULL. Unref with
gst_toc_unref() when no longer needed</doc>
<type name="Toc" c:type="GstToc*"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocSetter.</doc>
<type name="TocSetter" c:type="GstTocSetter*"/>
</instance-parameter>
</parameters>
</method>
<method name="reset" c:identifier="gst_toc_setter_reset">
<doc xml:space="preserve">Reset the internal TOC. Elements should call this from within the
state-change handler.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocSetter.</doc>
<type name="TocSetter" c:type="GstTocSetter*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_toc" c:identifier="gst_toc_setter_set_toc">
<doc xml:space="preserve">Set the given TOC on the setter. Previously set TOC will be
unreffed before setting a new one.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="setter" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocSetter.</doc>
<type name="TocSetter" c:type="GstTocSetter*"/>
</instance-parameter>
<parameter name="toc" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a #GstToc to set.</doc>
<type name="Toc" c:type="GstToc*"/>
</parameter>
</parameters>
</method>
</interface>
<record name="TocSetterInterface" c:type="GstTocSetterInterface" glib:is-gtype-struct-for="TocSetter">
<doc xml:space="preserve">#GstTocSetterInterface interface.</doc>
<field name="g_iface">
<doc xml:space="preserve">parent interface type.</doc>
<type name="GObject.TypeInterface" c:type="GTypeInterface"/>
</field>
</record>
<class name="Tracer" c:symbol-prefix="tracer" c:type="GstTracer" version="1.8" parent="Object" abstract="1" glib:type-name="GstTracer" glib:get-type="gst_tracer_get_type" glib:type-struct="TracerClass">
<doc xml:space="preserve">Tracing modules will subclass #GstTracer and register through
gst_tracer_register(). Modules can attach to various hook-types - see
gst_tracing_register_hook(). When invoked they receive hook specific
contextual data, which they must not modify.</doc>
<function name="register" c:identifier="gst_tracer_register">
<doc xml:space="preserve">Create a new tracer-factory capable of instantiating objects of the
@type and add the factory to @plugin.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the registering succeeded, %FALSE on error</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstPlugin, or %NULL for a static typefind function</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">The name for registering</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">GType of tracer to register</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<property name="params" writable="1" construct="1" transfer-ownership="none">
<type name="utf8" c:type="gchar*"/>
</property>
<field name="parent">
<type name="Object" c:type="GstObject"/>
</field>
<field name="priv" readable="0" private="1">
<type name="TracerPrivate" c:type="GstTracerPrivate*"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</class>
<record name="TracerClass" c:type="GstTracerClass" glib:is-gtype-struct-for="Tracer">
<field name="parent_class">
<type name="ObjectClass" c:type="GstObjectClass"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<class name="TracerFactory" c:symbol-prefix="tracer_factory" c:type="GstTracerFactory" version="1.8" parent="PluginFeature" glib:type-name="GstTracerFactory" glib:get-type="gst_tracer_factory_get_type" glib:type-struct="TracerFactoryClass">
<doc xml:space="preserve">Use gst_tracer_factory_get_list() to get a list of tracer factories known to
GStreamer.</doc>
<function name="get_list" c:identifier="gst_tracer_factory_get_list" version="1.8">
<doc xml:space="preserve">Gets the list of all registered tracer factories. You must free the
list using gst_plugin_feature_list_free().
The returned factories are sorted by factory name.
Free-function: gst_plugin_feature_list_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the list of all
registered #GstTracerFactory.</doc>
<type name="GLib.List" c:type="GList*">
<type name="TracerFactory"/>
</type>
</return-value>
</function>
<method name="get_tracer_type" c:identifier="gst_tracer_factory_get_tracer_type" version="1.14">
<doc xml:space="preserve">Get the #GType for elements managed by this factory. The type can
only be retrieved if the element factory is loaded, which can be
assured with gst_plugin_feature_load().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GType for tracers managed by this factory or 0 if
the factory is not loaded.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">factory to get managed #GType from</doc>
<type name="TracerFactory" c:type="GstTracerFactory*"/>
</instance-parameter>
</parameters>
</method>
</class>
<record name="TracerFactoryClass" c:type="GstTracerFactoryClass" disguised="1" glib:is-gtype-struct-for="TracerFactory"/>
<record name="TracerPrivate" c:type="GstTracerPrivate" disguised="1"/>
<class name="TracerRecord" c:symbol-prefix="tracer_record" c:type="GstTracerRecord" version="1.8" parent="Object" glib:type-name="GstTracerRecord" glib:get-type="gst_tracer_record_get_type" glib:type-struct="TracerRecordClass">
<doc xml:space="preserve">Tracing modules will create instances of this class to announce the data they
will log and create a log formatter.</doc>
<constructor name="new" c:identifier="gst_tracer_record_new" version="1.8" introspectable="0">
<doc xml:space="preserve">Create a new tracer record. The record instance can be used to efficiently
log entries using gst_tracer_record_log().
The @name without the ".class" suffix will be used for the log records.
There must be fields for each value that gets logged where the field name is
the value name. The field must be a #GstStructure describing the value. The
sub structure must contain a field called 'type' of %G_TYPE_GTYPE that
contains the GType of the value. The resulting #GstTracerRecord will take
ownership of the field structures.
The way to deal with optional values is to log an additional boolean before
the optional field, that if %TRUE signals that the optional field is valid
and %FALSE signals that the optional field should be ignored. One must still
log a placeholder value for the optional field though. Please also note, that
pointer type values must not be NULL - the underlying serialisation can not
handle that right now.
&gt; Please note that this is still under discussion and subject to change.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new #GstTracerRecord</doc>
<type name="TracerRecord" c:type="GstTracerRecord*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of new record, must end on ".class".</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="firstfield" transfer-ownership="none">
<doc xml:space="preserve">name of first field to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional arguments</doc>
<varargs/>
</parameter>
</parameters>
</constructor>
<method name="log" c:identifier="gst_tracer_record_log" version="1.8" introspectable="0">
<doc xml:space="preserve">Serialzes the trace event into the log.
Right now this is using the gstreamer debug log with the level TRACE (7) and
the category "GST_TRACER".
&gt; Please note that this is still under discussion and subject to change.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="self" transfer-ownership="none">
<doc xml:space="preserve">the tracer-record</doc>
<type name="TracerRecord" c:type="GstTracerRecord*"/>
</instance-parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the args as described in the spec-</doc>
<varargs/>
</parameter>
</parameters>
</method>
</class>
<record name="TracerRecordClass" c:type="GstTracerRecordClass" disguised="1" glib:is-gtype-struct-for="TracerRecord"/>
<bitfield name="TracerValueFlags" glib:type-name="GstTracerValueFlags" glib:get-type="gst_tracer_value_flags_get_type" c:type="GstTracerValueFlags">
<doc xml:space="preserve">Flag that describe the value. These flags help applications processing the
logs to understand the values.</doc>
<member name="none" value="0" c:identifier="GST_TRACER_VALUE_FLAGS_NONE" glib:nick="none">
<doc xml:space="preserve">no flags</doc>
</member>
<member name="optional" value="1" c:identifier="GST_TRACER_VALUE_FLAGS_OPTIONAL" glib:nick="optional">
<doc xml:space="preserve">the value is optional. When using this flag
one need to have an additional boolean arg before this value in the
var-args list passed to gst_tracer_record_log().</doc>
</member>
<member name="aggregated" value="2" c:identifier="GST_TRACER_VALUE_FLAGS_AGGREGATED" glib:nick="aggregated">
<doc xml:space="preserve">the value is a combined figure, since the
start of tracing. Examples are averages or timestamps.</doc>
</member>
</bitfield>
<enumeration name="TracerValueScope" version="1.8" glib:type-name="GstTracerValueScope" glib:get-type="gst_tracer_value_scope_get_type" c:type="GstTracerValueScope">
<doc xml:space="preserve">Tracing record will contain fields that contain a measured value or extra
meta-data. One such meta data are values that tell where a measurement was
taken. This enumerating declares to which scope such a meta data field
relates to. If it is e.g. %GST_TRACER_VALUE_SCOPE_PAD, then each of the log
events may contain values for different #GstPads.</doc>
<member name="process" value="0" c:identifier="GST_TRACER_VALUE_SCOPE_PROCESS" glib:nick="process">
<doc xml:space="preserve">the value is related to the process</doc>
</member>
<member name="thread" value="1" c:identifier="GST_TRACER_VALUE_SCOPE_THREAD" glib:nick="thread">
<doc xml:space="preserve">the value is related to a thread</doc>
</member>
<member name="element" value="2" c:identifier="GST_TRACER_VALUE_SCOPE_ELEMENT" glib:nick="element">
<doc xml:space="preserve">the value is related to an #GstElement</doc>
</member>
<member name="pad" value="3" c:identifier="GST_TRACER_VALUE_SCOPE_PAD" glib:nick="pad">
<doc xml:space="preserve">the value is related to a #GstPad</doc>
</member>
</enumeration>
<record name="TypeFind" c:type="GstTypeFind">
<doc xml:space="preserve">The following functions allow you to detect the media type of an unknown
stream.</doc>
<field name="peek">
<callback name="peek">
<return-value transfer-ownership="none">
<type name="guint8" c:type="const guint8*"/>
</return-value>
<parameters>
<parameter name="data" transfer-ownership="none">
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="offset" transfer-ownership="none">
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</callback>
</field>
<field name="suggest">
<callback name="suggest">
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="data" transfer-ownership="none">
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="probability" transfer-ownership="none">
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="caps" transfer-ownership="none">
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="data" writable="1">
<doc xml:space="preserve">The data used by the caller of the typefinding function.</doc>
<type name="gpointer" c:type="gpointer"/>
</field>
<field name="get_length">
<callback name="get_length">
<return-value transfer-ownership="none">
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="data" transfer-ownership="none">
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
<method name="get_length" c:identifier="gst_type_find_get_length">
<doc xml:space="preserve">Get the length of the data stream.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The length of the data stream, or 0 if it is not available.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<instance-parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">The #GstTypeFind the function was called with</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</instance-parameter>
</parameters>
</method>
<method name="peek" c:identifier="gst_type_find_peek">
<doc xml:space="preserve">Returns the @size bytes of the stream to identify beginning at offset. If
offset is a positive number, the offset is relative to the beginning of the
stream, if offset is a negative number the offset is relative to the end of
the stream. The returned memory is valid until the typefinding function
returns and must not be freed.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the
requested data, or %NULL if that data is not available.</doc>
<array length="1" zero-terminated="0" c:type="const guint8*">
<type name="guint8" c:type="guint8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">The #GstTypeFind object the function was called with</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</instance-parameter>
<parameter name="offset" transfer-ownership="none">
<doc xml:space="preserve">The offset</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="size" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">The number of bytes to return</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="suggest" c:identifier="gst_type_find_suggest">
<doc xml:space="preserve">If a #GstTypeFindFunction calls this function it suggests the caps with the
given probability. A #GstTypeFindFunction may supply different suggestions
in one call.
It is up to the caller of the #GstTypeFindFunction to interpret these values.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">The #GstTypeFind object the function was called with</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</instance-parameter>
<parameter name="probability" transfer-ownership="none">
<doc xml:space="preserve">The probability in percent that the suggestion is right</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">The fixed #GstCaps to suggest</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</method>
<method name="suggest_simple" c:identifier="gst_type_find_suggest_simple" introspectable="0">
<doc xml:space="preserve">If a #GstTypeFindFunction calls this function it suggests the caps with the
given probability. A #GstTypeFindFunction may supply different suggestions
in one call. It is up to the caller of the #GstTypeFindFunction to interpret
these values.
This function is similar to gst_type_find_suggest(), only that instead of
passing a #GstCaps argument you can create the caps on the fly in the same
way as you can with gst_caps_new_simple().
Make sure you terminate the list of arguments with a %NULL argument and that
the values passed have the correct type (in terms of width in bytes when
passed to the vararg function - this applies particularly to gdouble and
guint64 arguments).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">The #GstTypeFind object the function was called with</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</instance-parameter>
<parameter name="probability" transfer-ownership="none">
<doc xml:space="preserve">The probability in percent that the suggestion is right</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="media_type" transfer-ownership="none">
<doc xml:space="preserve">the media type of the suggested caps</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="fieldname" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">first field of the suggested caps, or %NULL</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">additional arguments to the suggested caps in the same format as the
arguments passed to gst_structure_new() (ie. triplets of field name,
field GType and field value)</doc>
<varargs/>
</parameter>
</parameters>
</method>
<function name="register" c:identifier="gst_type_find_register">
<doc xml:space="preserve">Registers a new typefind function to be used for typefinding. After
registering this function will be available for typefinding.
This function is typically called during an element's plugin initialization.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstPlugin, or %NULL for a static typefind function</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">The name for registering</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="rank" transfer-ownership="none">
<doc xml:space="preserve">The rank (or importance) of this typefind function</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="6" destroy="7">
<doc xml:space="preserve">The #GstTypeFindFunction to use</doc>
<type name="TypeFindFunction" c:type="GstTypeFindFunction"/>
</parameter>
<parameter name="extensions" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optional comma-separated list of extensions
that could belong to this type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="possible_caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optionally the caps that could be returned when typefinding
succeeds</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optional user data. This user data must be available until the plugin
is unloaded.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="data_notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GDestroyNotify that will be called on @data when the plugin
is unloaded.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</function>
</record>
<class name="TypeFindFactory" c:symbol-prefix="type_find_factory" c:type="GstTypeFindFactory" parent="PluginFeature" glib:type-name="GstTypeFindFactory" glib:get-type="gst_type_find_factory_get_type" glib:type-struct="TypeFindFactoryClass">
<doc xml:space="preserve">These functions allow querying information about registered typefind
functions. How to create and register these functions is described in
the section &lt;link linkend="gstreamer-Writing-typefind-functions"&gt;
"Writing typefind functions"&lt;/link&gt;.
The following example shows how to write a very simple typefinder that
identifies the given data. You can get quite a bit more complicated than
that though.
|[&lt;!-- language="C" --&gt;
typedef struct {
guint8 *data;
guint size;
guint probability;
GstCaps *data;
} MyTypeFind;
static void
my_peek (gpointer data, gint64 offset, guint size)
{
MyTypeFind *find = (MyTypeFind *) data;
if (offset &amp;gt;= 0 &amp;amp;&amp;amp; offset + size &amp;lt;= find-&gt;size) {
return find-&gt;data + offset;
}
return NULL;
}
static void
my_suggest (gpointer data, guint probability, GstCaps *caps)
{
MyTypeFind *find = (MyTypeFind *) data;
if (probability &amp;gt; find-&gt;probability) {
find-&gt;probability = probability;
gst_caps_replace (&amp;amp;find-&gt;caps, caps);
}
}
static GstCaps *
find_type (guint8 *data, guint size)
{
GList *walk, *type_list;
MyTypeFind find = {data, size, 0, NULL};
GstTypeFind gst_find = {my_peek, my_suggest, &amp;amp;find, };
walk = type_list = gst_type_find_factory_get_list ();
while (walk) {
GstTypeFindFactory *factory = GST_TYPE_FIND_FACTORY (walk-&gt;data);
walk = g_list_next (walk)
gst_type_find_factory_call_function (factory, &amp;amp;gst_find);
}
g_list_free (type_list);
return find.caps;
};
]|</doc>
<function name="get_list" c:identifier="gst_type_find_factory_get_list">
<doc xml:space="preserve">Gets the list of all registered typefind factories. You must free the
list using gst_plugin_feature_list_free().
The returned factories are sorted by highest rank first, and then by
factory name.
Free-function: gst_plugin_feature_list_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the list of all
registered #GstTypeFindFactory.</doc>
<type name="GLib.List" c:type="GList*">
<type name="TypeFindFactory"/>
</type>
</return-value>
</function>
<method name="call_function" c:identifier="gst_type_find_factory_call_function">
<doc xml:space="preserve">Calls the #GstTypeFindFunction associated with this factory.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">A #GstTypeFindFactory</doc>
<type name="TypeFindFactory" c:type="GstTypeFindFactory*"/>
</instance-parameter>
<parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">a properly setup #GstTypeFind entry. The get_data
and suggest_type members must be set.</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</parameter>
</parameters>
</method>
<method name="get_caps" c:identifier="gst_type_find_factory_get_caps">
<doc xml:space="preserve">Gets the #GstCaps associated with a typefind factory.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the #GstCaps associated with this factory</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">A #GstTypeFindFactory</doc>
<type name="TypeFindFactory" c:type="GstTypeFindFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_extensions" c:identifier="gst_type_find_factory_get_extensions">
<doc xml:space="preserve">Gets the extensions associated with a #GstTypeFindFactory. The returned
array should not be changed. If you need to change stuff in it, you should
copy it using g_strdupv(). This function may return %NULL to indicate
a 0-length list.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">
a %NULL-terminated array of extensions associated with this factory</doc>
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">A #GstTypeFindFactory</doc>
<type name="TypeFindFactory" c:type="GstTypeFindFactory*"/>
</instance-parameter>
</parameters>
</method>
<method name="has_function" c:identifier="gst_type_find_factory_has_function">
<doc xml:space="preserve">Check whether the factory has a typefind function. Typefind factories
without typefind functions are a last-effort fallback mechanism to
e.g. assume a certain media type based on the file extension.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the factory has a typefind functions set, otherwise %FALSE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="factory" transfer-ownership="none">
<doc xml:space="preserve">A #GstTypeFindFactory</doc>
<type name="TypeFindFactory" c:type="GstTypeFindFactory*"/>
</instance-parameter>
</parameters>
</method>
</class>
<record name="TypeFindFactoryClass" c:type="GstTypeFindFactoryClass" disguised="1" glib:is-gtype-struct-for="TypeFindFactory"/>
<callback name="TypeFindFunction" c:type="GstTypeFindFunction">
<doc xml:space="preserve">A function that will be called by typefinding.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="find" transfer-ownership="none">
<doc xml:space="preserve">A #GstTypeFind structure</doc>
<type name="TypeFind" c:type="GstTypeFind*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1" closure="1">
<doc xml:space="preserve">optional data to pass to the function</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</callback>
<enumeration name="TypeFindProbability" glib:type-name="GstTypeFindProbability" glib:get-type="gst_type_find_probability_get_type" c:type="GstTypeFindProbability">
<doc xml:space="preserve">The probability of the typefind function. Higher values have more certainty
in doing a reliable typefind.</doc>
<member name="none" value="0" c:identifier="GST_TYPE_FIND_NONE" glib:nick="none">
<doc xml:space="preserve">type undetected.</doc>
</member>
<member name="minimum" value="1" c:identifier="GST_TYPE_FIND_MINIMUM" glib:nick="minimum">
<doc xml:space="preserve">unlikely typefind.</doc>
</member>
<member name="possible" value="50" c:identifier="GST_TYPE_FIND_POSSIBLE" glib:nick="possible">
<doc xml:space="preserve">possible type detected.</doc>
</member>
<member name="likely" value="80" c:identifier="GST_TYPE_FIND_LIKELY" glib:nick="likely">
<doc xml:space="preserve">likely a type was detected.</doc>
</member>
<member name="nearly_certain" value="99" c:identifier="GST_TYPE_FIND_NEARLY_CERTAIN" glib:nick="nearly-certain">
<doc xml:space="preserve">nearly certain that a type was detected.</doc>
</member>
<member name="maximum" value="100" c:identifier="GST_TYPE_FIND_MAXIMUM" glib:nick="maximum">
<doc xml:space="preserve">very certain a type was detected.</doc>
</member>
</enumeration>
<function-macro name="URI" c:identifier="GST_URI" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<enumeration name="URIError" glib:type-name="GstURIError" glib:get-type="gst_uri_error_get_type" c:type="GstURIError" glib:error-domain="gst-uri-error-quark">
<doc xml:space="preserve">Different URI-related errors that can occur.</doc>
<member name="unsupported_protocol" value="0" c:identifier="GST_URI_ERROR_UNSUPPORTED_PROTOCOL" glib:nick="unsupported-protocol">
<doc xml:space="preserve">The protocol is not supported</doc>
</member>
<member name="bad_uri" value="1" c:identifier="GST_URI_ERROR_BAD_URI" glib:nick="bad-uri">
<doc xml:space="preserve">There was a problem with the URI</doc>
</member>
<member name="bad_state" value="2" c:identifier="GST_URI_ERROR_BAD_STATE" glib:nick="bad-state">
<doc xml:space="preserve">Could not set or change the URI because the
URI handler was in a state where that is not possible or not permitted</doc>
</member>
<member name="bad_reference" value="3" c:identifier="GST_URI_ERROR_BAD_REFERENCE" glib:nick="bad-reference">
<doc xml:space="preserve">There was a problem with the entity that
the URI references</doc>
</member>
<function name="quark" c:identifier="gst_uri_error_quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
</enumeration>
<interface name="URIHandler" c:symbol-prefix="uri_handler" c:type="GstURIHandler" glib:type-name="GstURIHandler" glib:get-type="gst_uri_handler_get_type" glib:type-struct="URIHandlerInterface">
<doc xml:space="preserve">The #GstURIHandler is an interface that is implemented by Source and Sink
#GstElement to unify handling of URI.
An application can use the following functions to quickly get an element
that handles the given URI for reading or writing
(gst_element_make_from_uri()).
Source and Sink plugins should implement this interface when possible.</doc>
<virtual-method name="get_uri" invoker="get_uri">
<doc xml:space="preserve">Gets the currently handled URI.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the URI currently handled by
the @handler. Returns %NULL if there are no URI currently
handled. The returned string must be freed with g_free() when no
longer needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
</parameters>
</virtual-method>
<virtual-method name="set_uri" invoker="set_uri" throws="1">
<doc xml:space="preserve">Tries to set the URI of the given handler.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the URI was set successfully, else %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">URI to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</virtual-method>
<method name="get_protocols" c:identifier="gst_uri_handler_get_protocols">
<doc xml:space="preserve">Gets the list of protocols supported by @handler. This list may not be
modified.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the
supported protocols. Returns %NULL if the @handler isn't
implemented properly, or the @handler doesn't support any
protocols.</doc>
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler.</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_uri" c:identifier="gst_uri_handler_get_uri">
<doc xml:space="preserve">Gets the currently handled URI.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the URI currently handled by
the @handler. Returns %NULL if there are no URI currently
handled. The returned string must be freed with g_free() when no
longer needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_uri_type" c:identifier="gst_uri_handler_get_uri_type">
<doc xml:space="preserve">Gets the type of the given URI handler</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GstURIType of the URI handler.
Returns #GST_URI_UNKNOWN if the @handler isn't implemented correctly.</doc>
<type name="URIType" c:type="GstURIType"/>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler.</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
</parameters>
</method>
<method name="set_uri" c:identifier="gst_uri_handler_set_uri" throws="1">
<doc xml:space="preserve">Tries to set the URI of the given handler.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the URI was set successfully, else %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</instance-parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">URI to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
</interface>
<record name="URIHandlerInterface" c:type="GstURIHandlerInterface" glib:is-gtype-struct-for="URIHandler">
<doc xml:space="preserve">Any #GstElement using this interface should implement these methods.</doc>
<field name="parent">
<doc xml:space="preserve">The parent interface type</doc>
<type name="GObject.TypeInterface" c:type="GTypeInterface"/>
</field>
<field name="get_type">
<callback name="get_type">
<return-value transfer-ownership="none">
<type name="URIType" c:type="GstURIType"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_protocols">
<callback name="get_protocols">
<return-value transfer-ownership="none">
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</callback>
</field>
<field name="get_uri">
<callback name="get_uri">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the URI currently handled by
the @handler. Returns %NULL if there are no URI currently
handled. The returned string must be freed with g_free() when no
longer needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</parameter>
</parameters>
</callback>
</field>
<field name="set_uri">
<callback name="set_uri" throws="1">
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the URI was set successfully, else %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="handler" transfer-ownership="none">
<doc xml:space="preserve">A #GstURIHandler</doc>
<type name="URIHandler" c:type="GstURIHandler*"/>
</parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">URI to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
</field>
</record>
<enumeration name="URIType" glib:type-name="GstURIType" glib:get-type="gst_uri_type_get_type" c:type="GstURIType">
<doc xml:space="preserve">The different types of URI direction.</doc>
<member name="unknown" value="0" c:identifier="GST_URI_UNKNOWN" glib:nick="unknown">
<doc xml:space="preserve">The URI direction is unknown</doc>
</member>
<member name="sink" value="1" c:identifier="GST_URI_SINK" glib:nick="sink">
<doc xml:space="preserve">The URI is a consumer.</doc>
</member>
<member name="src" value="2" c:identifier="GST_URI_SRC" glib:nick="src">
<doc xml:space="preserve">The URI is a producer.</doc>
</member>
</enumeration>
<function-macro name="URI_CAST" c:identifier="GST_URI_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="URI_CONST_CAST" c:identifier="GST_URI_CONST_CAST" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="URI_HANDLER" c:identifier="GST_URI_HANDLER" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<function-macro name="URI_HANDLER_GET_INTERFACE" c:identifier="GST_URI_HANDLER_GET_INTERFACE" introspectable="0">
<parameters>
<parameter name="obj">
</parameter>
</parameters>
</function-macro>
<constant name="URI_NO_PORT" value="0" c:type="GST_URI_NO_PORT">
<doc xml:space="preserve">Value for #GstUri&lt;!-- --&gt;.port to indicate no port number.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="URI_TYPE_IS_VALID" c:identifier="GST_URI_TYPE_IS_VALID" introspectable="0">
<doc xml:space="preserve">Tests if the type direction is valid.</doc>
<parameters>
<parameter name="type">
<doc xml:space="preserve">A #GstURIType</doc>
</parameter>
</parameters>
</function-macro>
<constant name="USECOND" value="1000" c:type="GST_USECOND">
<doc xml:space="preserve">Constant that defines one GStreamer microsecond.</doc>
<type name="ClockTimeDiff" c:type="GstClockTimeDiff"/>
</constant>
<record name="Uri" c:type="GstUri" glib:type-name="GstUri" glib:get-type="gst_uri_get_type" c:symbol-prefix="uri">
<doc xml:space="preserve">A #GstUri object can be used to parse and split a URI string into its
constituent parts. Two #GstUri objects can be joined to make a new #GstUri
using the algorithm described in RFC3986.</doc>
<constructor name="new" c:identifier="gst_uri_new" version="1.6">
<doc xml:space="preserve">Creates a new #GstUri object with the given URI parts. The path and query
strings will be broken down into their elements. All strings should not be
escaped except where indicated.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A new #GstUri object.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<parameter name="scheme" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The scheme for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="userinfo" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The user-info for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="host" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The host name for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="port" transfer-ownership="none">
<doc xml:space="preserve">The port number for the new URI or %GST_URI_NO_PORT.</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="path" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The path for the new URI with '/' separating path
elements.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="query" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The query string for the new URI with '&amp;' separating
query elements. Elements containing '&amp;' characters
should encode them as "&amp;percnt;26".</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="fragment" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The fragment name for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</constructor>
<method name="append_path" c:identifier="gst_uri_append_path" version="1.6">
<doc xml:space="preserve">Append a path onto the end of the path in the URI. The path is not
normalized, call #gst_uri_normalize() to normalize the path.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the path was appended successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="relative_path" transfer-ownership="none">
<doc xml:space="preserve">Relative path to append to the end of the current path.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="append_path_segment" c:identifier="gst_uri_append_path_segment" version="1.6">
<doc xml:space="preserve">Append a single path segment onto the end of the URI path.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the path was appended successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="path_segment" transfer-ownership="none">
<doc xml:space="preserve">The path segment string to append to the URI path.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="equal" c:identifier="gst_uri_equal" version="1.6">
<doc xml:space="preserve">Compares two #GstUri objects to see if they represent the same normalized
URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the normalized versions of the two URI's would be equal.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="first" transfer-ownership="none">
<doc xml:space="preserve">First #GstUri to compare.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
<parameter name="second" transfer-ownership="none">
<doc xml:space="preserve">Second #GstUri to compare.</doc>
<type name="Uri" c:type="const GstUri*"/>
</parameter>
</parameters>
</method>
<method name="from_string_with_base" c:identifier="gst_uri_from_string_with_base" version="1.6">
<doc xml:space="preserve">Like gst_uri_from_string() but also joins with a base URI.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A new #GstUri object.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<instance-parameter name="base" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The base URI to join the new URI with.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The URI string to parse.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_fragment" c:identifier="gst_uri_get_fragment" version="1.6">
<doc xml:space="preserve">Get the fragment name from the URI or %NULL if it doesn't exist.
If @uri is %NULL then returns %NULL.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The host name from the #GstUri object or %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">This #GstUri object.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_host" c:identifier="gst_uri_get_host" version="1.6">
<doc xml:space="preserve">Get the host name from the URI or %NULL if it doesn't exist.
If @uri is %NULL then returns %NULL.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The host name from the #GstUri object or %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">This #GstUri object.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_media_fragment_table" c:identifier="gst_uri_get_media_fragment_table" version="1.12">
<doc xml:space="preserve">Get the media fragment table from the URI, as defined by "Media Fragments URI 1.0".
Hash table returned by this API is a list of "key-value" pairs, and the each
pair is generated by splitting "URI fragment" per "&amp;" sub-delims, then "key"
and "value" are split by "=" sub-delims. The "key" returned by this API may
be undefined keyword by standard.
A value may be %NULL to indicate that the key should appear in the fragment
string in the URI, but does not have a value. Free the returned #GHashTable
with #g_hash_table_unref() when it is no longer required.
Modifying this hash table does not affect the fragment in the URI.
See more about Media Fragments URI 1.0 (W3C) at https://www.w3.org/TR/media-frags/</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The
fragment hash table from the URI.</doc>
<type name="GLib.HashTable" c:type="GHashTable*">
<type name="utf8"/>
<type name="utf8"/>
</type>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to get the fragment table from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_path" c:identifier="gst_uri_get_path" version="1.6">
<doc xml:space="preserve">Extract the path string from the URI object.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The path from the URI. Once finished
with the string should be g_free()'d.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The #GstUri to get the path from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_path_segments" c:identifier="gst_uri_get_path_segments" version="1.6">
<doc xml:space="preserve">Get a list of path segments from the URI.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A #GList of path segment
strings or %NULL if no path segments are available. Free the list
when no longer needed with g_list_free_full(list, g_free).</doc>
<type name="GLib.List" c:type="GList*">
<type name="utf8"/>
</type>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to get the path from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_path_string" c:identifier="gst_uri_get_path_string" version="1.6">
<doc xml:space="preserve">Extract the path string from the URI object as a percent encoded URI path.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The path from the URI. Once finished
with the string should be g_free()'d.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The #GstUri to get the path from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_port" c:identifier="gst_uri_get_port" version="1.6">
<doc xml:space="preserve">Get the port number from the URI or %GST_URI_NO_PORT if it doesn't exist.
If @uri is %NULL then returns %GST_URI_NO_PORT.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The port number from the #GstUri object or %GST_URI_NO_PORT.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">This #GstUri object.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_query_keys" c:identifier="gst_uri_get_query_keys" version="1.6">
<doc xml:space="preserve">Get a list of the query keys from the URI.</doc>
<return-value transfer-ownership="container">
<doc xml:space="preserve">A list of keys from
the URI query. Free the list with g_list_free().</doc>
<type name="GLib.List" c:type="GList*">
<type name="utf8"/>
</type>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to examine.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_query_string" c:identifier="gst_uri_get_query_string" version="1.6">
<doc xml:space="preserve">Get a percent encoded URI query string from the @uri.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A percent encoded query string. Use
g_free() when no longer needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to get the query string from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_query_table" c:identifier="gst_uri_get_query_table" version="1.6">
<doc xml:space="preserve">Get the query table from the URI. Keys and values in the table are freed
with g_free when they are deleted. A value may be %NULL to indicate that
the key should appear in the query string in the URI, but does not have a
value. Free the returned #GHashTable with #g_hash_table_unref() when it is
no longer required. Modifying this hash table will modify the query in the
URI.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The query
hash table from the URI.</doc>
<type name="GLib.HashTable" c:type="GHashTable*">
<type name="utf8"/>
<type name="utf8"/>
</type>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to get the query table from.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_query_value" c:identifier="gst_uri_get_query_value" version="1.6">
<doc xml:space="preserve">Get the value associated with the @query_key key. Will return %NULL if the
key has no value or if the key does not exist in the URI query table. Because
%NULL is returned for both missing keys and keys with no value, you should
use gst_uri_query_has_key() to determine if a key is present in the URI
query.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The value for the given key, or %NULL if not found.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to examine.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
<parameter name="query_key" transfer-ownership="none">
<doc xml:space="preserve">The key to lookup.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="get_scheme" c:identifier="gst_uri_get_scheme">
<doc xml:space="preserve">Get the scheme name from the URI or %NULL if it doesn't exist.
If @uri is %NULL then returns %NULL.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The scheme from the #GstUri object or %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">This #GstUri object.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="get_userinfo" c:identifier="gst_uri_get_userinfo" version="1.6">
<doc xml:space="preserve">Get the userinfo (usually in the form "username:password") from the URI
or %NULL if it doesn't exist. If @uri is %NULL then returns %NULL.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The userinfo from the #GstUri object or %NULL.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">This #GstUri object.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_normalized" c:identifier="gst_uri_is_normalized" version="1.6">
<doc xml:space="preserve">Tests the @uri to see if it is normalized. A %NULL @uri is considered to be
normalized.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">TRUE if the URI is normalized or is %NULL.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The #GstUri to test to see if it is normalized.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="is_writable" c:identifier="gst_uri_is_writable" version="1.6">
<doc xml:space="preserve">Check if it is safe to write to this #GstUri.
Check if the refcount of @uri is exactly 1, meaning that no other
reference exists to the #GstUri and that the #GstUri is therefore writable.
Modification of a #GstUri should only be done after verifying that it is
writable.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if it is safe to write to the object.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The #GstUri object to test.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="join" c:identifier="gst_uri_join" version="1.6">
<doc xml:space="preserve">Join a reference URI onto a base URI using the method from RFC 3986.
If either URI is %NULL then the other URI will be returned with the ref count
increased.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A #GstUri which represents the base
with the reference URI joined on.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<instance-parameter name="base_uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The base URI to join another to.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="ref_uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The reference URI to join onto the
base URI.</doc>
<type name="Uri" c:type="GstUri*"/>
</parameter>
</parameters>
</method>
<method name="make_writable" c:identifier="gst_uri_make_writable" version="1.6">
<doc xml:space="preserve">Make the #GstUri writable.
Checks if @uri is writable, and if so the original object is returned. If
not, then a writable copy is made and returned. This gives away the
reference to @uri and returns a reference to the new #GstUri.
If @uri is %NULL then %NULL is returned.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A writable version of @uri.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="full">
<doc xml:space="preserve">The #GstUri object to make writable.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="new_with_base" c:identifier="gst_uri_new_with_base" version="1.6">
<doc xml:space="preserve">Like gst_uri_new(), but joins the new URI onto a base URI.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The new URI joined onto @base.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<instance-parameter name="base" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The base URI to join the new URI to.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="scheme" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The scheme for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="userinfo" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The user-info for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="host" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The host name for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="port" transfer-ownership="none">
<doc xml:space="preserve">The port number for the new URI or %GST_URI_NO_PORT.</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="path" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The path for the new URI with '/' separating path
elements.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="query" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The query string for the new URI with '&amp;' separating
query elements. Elements containing '&amp;' characters
should encode them as "&amp;percnt;26".</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="fragment" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The fragment name for the new URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="normalize" c:identifier="gst_uri_normalize" version="1.6">
<doc xml:space="preserve">Normalization will remove extra path segments ("." and "..") from the URI. It
will also convert the scheme and host name to lower case and any
percent-encoded values to uppercase.
The #GstUri object must be writable. Check with gst_uri_is_writable() or use
gst_uri_make_writable() first.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">TRUE if the URI was modified.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The #GstUri to normalize.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
</parameters>
</method>
<method name="query_has_key" c:identifier="gst_uri_query_has_key" version="1.6">
<doc xml:space="preserve">Check if there is a query table entry for the @query_key key.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @query_key exists in the URI query table.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to examine.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
<parameter name="query_key" transfer-ownership="none">
<doc xml:space="preserve">The key to lookup.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="remove_query_key" c:identifier="gst_uri_remove_query_key" version="1.6">
<doc xml:space="preserve">Remove an entry from the query table by key.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the key existed in the table and was removed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="query_key" transfer-ownership="none">
<doc xml:space="preserve">The key to remove.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_fragment" c:identifier="gst_uri_set_fragment" version="1.6">
<doc xml:space="preserve">Sets the fragment string in the URI. Use a value of %NULL in @fragment to
unset the fragment string.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the fragment was set/unset successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="fragment" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The fragment string to set.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_host" c:identifier="gst_uri_set_host" version="1.6">
<doc xml:space="preserve">Set or unset the host for the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the host was set/unset successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="host" transfer-ownership="none">
<doc xml:space="preserve">The new host string to set or %NULL to unset.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_path" c:identifier="gst_uri_set_path" version="1.6">
<doc xml:space="preserve">Sets or unsets the path in the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the path was set successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="path" transfer-ownership="none">
<doc xml:space="preserve">The new path to set with path segments separated by '/', or use %NULL
to unset the path.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_path_segments" c:identifier="gst_uri_set_path_segments" version="1.6">
<doc xml:space="preserve">Replace the path segments list in the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the path segments were set successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="path_segments" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">The new
path list to set.</doc>
<type name="GLib.List" c:type="GList*">
<type name="utf8"/>
</type>
</parameter>
</parameters>
</method>
<method name="set_path_string" c:identifier="gst_uri_set_path_string" version="1.6">
<doc xml:space="preserve">Sets or unsets the path in the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the path was set successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="path" transfer-ownership="none">
<doc xml:space="preserve">The new percent encoded path to set with path segments separated by
'/', or use %NULL to unset the path.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_port" c:identifier="gst_uri_set_port" version="1.6">
<doc xml:space="preserve">Set or unset the port number for the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the port number was set/unset successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="port" transfer-ownership="none">
<doc xml:space="preserve">The new port number to set or %GST_URI_NO_PORT to unset.</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</method>
<method name="set_query_string" c:identifier="gst_uri_set_query_string" version="1.6">
<doc xml:space="preserve">Sets or unsets the query table in the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query table was set successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="query" transfer-ownership="none">
<doc xml:space="preserve">The new percent encoded query string to use to populate the query
table, or use %NULL to unset the query table.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_query_table" c:identifier="gst_uri_set_query_table" version="1.6">
<doc xml:space="preserve">Set the query table to use in the URI. The old table is unreferenced and a
reference to the new one is used instead. A value if %NULL for @query_table
will remove the query string from the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the new table was successfully used for the query table.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="query_table" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The new
query table to use.</doc>
<type name="GLib.HashTable" c:type="GHashTable*">
<type name="utf8"/>
<type name="utf8"/>
</type>
</parameter>
</parameters>
</method>
<method name="set_query_value" c:identifier="gst_uri_set_query_value" version="1.6">
<doc xml:space="preserve">This inserts or replaces a key in the query table. A @query_value of %NULL
indicates that the key has no associated value, but will still be present in
the query string.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the query table was successfully updated.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="query_key" transfer-ownership="none">
<doc xml:space="preserve">The key for the query entry.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="query_value" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The value for the key.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_scheme" c:identifier="gst_uri_set_scheme" version="1.6">
<doc xml:space="preserve">Set or unset the scheme for the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the scheme was set/unset successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="scheme" transfer-ownership="none">
<doc xml:space="preserve">The new scheme to set or %NULL to unset the scheme.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="set_userinfo" c:identifier="gst_uri_set_userinfo" version="1.6">
<doc xml:space="preserve">Set or unset the user information for the URI.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the user information was set/unset successfully.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">The #GstUri to modify.</doc>
<type name="Uri" c:type="GstUri*"/>
</instance-parameter>
<parameter name="userinfo" transfer-ownership="none">
<doc xml:space="preserve">The new user-information string to set or %NULL to unset.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</method>
<method name="to_string" c:identifier="gst_uri_to_string" version="1.6">
<doc xml:space="preserve">Convert the URI to a string.
Returns the URI as held in this object as a #gchar* nul-terminated string.
The caller should g_free() the string once they are finished with it.
The string is put together as described in RFC 3986.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">The string version of the URI.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<instance-parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">This #GstUri to convert to a string.</doc>
<type name="Uri" c:type="const GstUri*"/>
</instance-parameter>
</parameters>
</method>
<function name="construct" c:identifier="gst_uri_construct" deprecated="1">
<doc xml:space="preserve">Constructs a URI for a given valid protocol and location.
Free-function: g_free</doc>
<doc-deprecated xml:space="preserve">Use GstURI instead.</doc-deprecated>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new string for this URI. Returns %NULL if the
given URI protocol is not valid, or the given location is %NULL.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">Protocol for URI</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="location" transfer-ownership="none">
<doc xml:space="preserve">Location for URI</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="from_string" c:identifier="gst_uri_from_string" version="1.6">
<doc xml:space="preserve">Parses a URI string into a new #GstUri object. Will return NULL if the URI
cannot be parsed.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A new #GstUri object, or NULL.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The URI string to parse.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="from_string_escaped" c:identifier="gst_uri_from_string_escaped" version="1.18">
<doc xml:space="preserve">Parses a URI string into a new #GstUri object. Will return NULL if the URI
cannot be parsed. This is identical to gst_uri_from_string() except that
the userinfo and fragment components of the URI will not be unescaped while
parsing.
Use this when you need to extract a username and password from the userinfo
such as https://user:password@example.com since either may contain
a URI-escaped ':' character. gst_uri_from_string() will unescape the entire
userinfo component, which will make it impossible to know which ':'
delineates the username and password.
The same applies to the fragment component of the URI, such as
https://example.com/path#fragment which may contain a URI-escaped '#'.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A new #GstUri object, or NULL.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The URI string to parse.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="get_location" c:identifier="gst_uri_get_location">
<doc xml:space="preserve">Extracts the location out of a given valid URI, ie. the protocol and "://"
are stripped from the URI, which means that the location returned includes
the hostname if one is specified. The returned string must be freed using
g_free().
Free-function: g_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the location for this URI. Returns
%NULL if the URI isn't valid. If the URI does not contain a location, an
empty string is returned.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="get_protocol" c:identifier="gst_uri_get_protocol">
<doc xml:space="preserve">Extracts the protocol out of a given valid URI. The returned string must be
freed using g_free().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The protocol for this URI.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="has_protocol" c:identifier="gst_uri_has_protocol">
<doc xml:space="preserve">Checks if the protocol of a given valid URI matches @protocol.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the protocol matches.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">a URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">a protocol string (e.g. "http")</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="is_valid" c:identifier="gst_uri_is_valid">
<doc xml:space="preserve">Tests if the given string is a valid URI identifier. URIs start with a valid
scheme followed by ":" and maybe a string identifying the location.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the string is a valid URI</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="join_strings" c:identifier="gst_uri_join_strings" version="1.6">
<doc xml:space="preserve">This is a convenience function to join two URI strings and return the result.
The returned string should be g_free()'d after use.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A string representing the percent-encoded join of
the two URIs.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="base_uri" transfer-ownership="none">
<doc xml:space="preserve">The percent-encoded base URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="ref_uri" transfer-ownership="none">
<doc xml:space="preserve">The percent-encoded reference URI to join to the @base_uri.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="protocol_is_supported" c:identifier="gst_uri_protocol_is_supported">
<doc xml:space="preserve">Checks if an element exists that supports the given URI protocol. Note
that a positive return value does not imply that a subsequent call to
gst_element_make_from_uri() is guaranteed to work.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">Whether to check for a source or a sink</doc>
<type name="URIType" c:type="const GstURIType"/>
</parameter>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">Protocol that should be checked for (e.g. "http" or "smb")</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="protocol_is_valid" c:identifier="gst_uri_protocol_is_valid">
<doc xml:space="preserve">Tests if the given string is a valid protocol identifier. Protocols
must consist of alphanumeric characters, '+', '-' and '.' and must
start with a alphabetic character. See RFC 3986 Section 3.1.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the string is a valid protocol identifier, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">A string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
</record>
<constant name="VALUE_EQUAL" value="0" c:type="GST_VALUE_EQUAL">
<doc xml:space="preserve">Indicates that the first value provided to a comparison function
(gst_value_compare()) is equal to the second one.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VALUE_GREATER_THAN" value="1" c:type="GST_VALUE_GREATER_THAN">
<doc xml:space="preserve">Indicates that the first value provided to a comparison function
(gst_value_compare()) is greater than the second one.</doc>
<type name="gint" c:type="gint"/>
</constant>
<function-macro name="VALUE_HOLDS_ARRAY" c:identifier="GST_VALUE_HOLDS_ARRAY" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_ARRAY value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_BITMASK" c:identifier="GST_VALUE_HOLDS_BITMASK" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_BITMASK value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_BUFFER" c:identifier="GST_VALUE_HOLDS_BUFFER" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_BUFFER value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_CAPS" c:identifier="GST_VALUE_HOLDS_CAPS" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_CAPS value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_CAPS_FEATURES" c:identifier="GST_VALUE_HOLDS_CAPS_FEATURES" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_CAPS_FEATURES value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_DATE_TIME" c:identifier="GST_VALUE_HOLDS_DATE_TIME" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_DATE_TIME value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_DOUBLE_RANGE" c:identifier="GST_VALUE_HOLDS_DOUBLE_RANGE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_DOUBLE_RANGE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_FLAG_SET" c:identifier="GST_VALUE_HOLDS_FLAG_SET" version="1.6" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_FLAG_SET value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_FRACTION" c:identifier="GST_VALUE_HOLDS_FRACTION" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_FRACTION value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_FRACTION_RANGE" c:identifier="GST_VALUE_HOLDS_FRACTION_RANGE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_FRACTION_RANGE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_INT64_RANGE" c:identifier="GST_VALUE_HOLDS_INT64_RANGE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_INT64_RANGE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_INT_RANGE" c:identifier="GST_VALUE_HOLDS_INT_RANGE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_INT_RANGE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_LIST" c:identifier="GST_VALUE_HOLDS_LIST" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_LIST value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_SAMPLE" c:identifier="GST_VALUE_HOLDS_SAMPLE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_SAMPLE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="VALUE_HOLDS_STRUCTURE" c:identifier="GST_VALUE_HOLDS_STRUCTURE" introspectable="0">
<doc xml:space="preserve">Checks if the given #GValue contains a #GST_TYPE_STRUCTURE value.</doc>
<parameters>
<parameter name="x">
<doc xml:space="preserve">the #GValue to check</doc>
</parameter>
</parameters>
</function-macro>
<constant name="VALUE_LESS_THAN" value="-1" c:type="GST_VALUE_LESS_THAN">
<doc xml:space="preserve">Indicates that the first value provided to a comparison function
(gst_value_compare()) is lesser than the second one.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VALUE_UNORDERED" value="2" c:type="GST_VALUE_UNORDERED">
<doc xml:space="preserve">Indicates that the comparison function (gst_value_compare()) can not
determine a order for the two provided values.</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VERSION_MAJOR" value="1" c:type="GST_VERSION_MAJOR">
<doc xml:space="preserve">The major version of GStreamer at compile time:</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VERSION_MICRO" value="2" c:type="GST_VERSION_MICRO">
<doc xml:space="preserve">The micro version of GStreamer at compile time:</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VERSION_MINOR" value="18" c:type="GST_VERSION_MINOR">
<doc xml:space="preserve">The minor version of GStreamer at compile time:</doc>
<type name="gint" c:type="gint"/>
</constant>
<constant name="VERSION_NANO" value="0" c:type="GST_VERSION_NANO">
<doc xml:space="preserve">The nano version of GStreamer at compile time:
Actual releases have 0, GIT versions have 1, prerelease versions have 2-...</doc>
<type name="gint" c:type="gint"/>
</constant>
<class name="ValueArray" c:symbol-prefix="value_array" c:type="GstValueArray" glib:type-name="GstValueArray" glib:get-type="gst_value_array_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes an ordered list of #GValue</doc>
<function name="append_and_take_value" c:identifier="gst_value_array_append_and_take_value" version="1.2">
<doc xml:space="preserve">Appends @append_value to the GstValueArray in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_ARRAY</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="append_value" transfer-ownership="full">
<doc xml:space="preserve">the value to append</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</function>
<function name="append_value" c:identifier="gst_value_array_append_value">
<doc xml:space="preserve">Appends @append_value to the GstValueArray in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_ARRAY</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="append_value" transfer-ownership="none">
<doc xml:space="preserve">the value to append</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="get_size" c:identifier="gst_value_array_get_size">
<doc xml:space="preserve">Gets the number of values contained in @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_ARRAY</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="get_value" c:identifier="gst_value_array_get_value">
<doc xml:space="preserve">Gets the value that is a member of the array contained in @value and
has the index @index.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the value at the given index</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_ARRAY</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">index of value to get from the array</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="init" c:identifier="gst_value_array_init" version="1.18">
<doc xml:space="preserve">Initializes and pre-allocates a #GValue of type #GST_VALUE_ARRAY.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GValue structure that has been passed in</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">A zero-filled (uninitialized) #GValue structure</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="prealloc" transfer-ownership="none">
<doc xml:space="preserve">The number of entries to pre-allocate in the array</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="prepend_value" c:identifier="gst_value_array_prepend_value">
<doc xml:space="preserve">Prepends @prepend_value to the GstValueArray in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_ARRAY</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="prepend_value" transfer-ownership="none">
<doc xml:space="preserve">the value to prepend</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
</class>
<callback name="ValueCompareFunc" c:type="GstValueCompareFunc">
<doc xml:space="preserve">Used together with gst_value_compare() to compare #GValue items.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">one of GST_VALUE_LESS_THAN, GST_VALUE_EQUAL, GST_VALUE_GREATER_THAN
or GST_VALUE_UNORDERED</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">first value for comparison</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">second value for comparison</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</callback>
<callback name="ValueDeserializeFunc" c:type="GstValueDeserializeFunc">
<doc xml:space="preserve">Used by gst_value_deserialize() to parse a non-binary form into the #GValue.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="s" transfer-ownership="none">
<doc xml:space="preserve">a string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</callback>
<class name="ValueList" c:symbol-prefix="value_list" glib:type-name="GstValueList" glib:get-type="gst_value_list_get_type" glib:fundamental="1">
<doc xml:space="preserve">A fundamental type that describes an unordered list of #GValue</doc>
<function name="append_and_take_value" c:identifier="gst_value_list_append_and_take_value" version="1.2">
<doc xml:space="preserve">Appends @append_value to the GstValueList in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_LIST</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="append_value" transfer-ownership="full">
<doc xml:space="preserve">the value to append</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
</parameters>
</function>
<function name="append_value" c:identifier="gst_value_list_append_value">
<doc xml:space="preserve">Appends @append_value to the GstValueList in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_LIST</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="append_value" transfer-ownership="none">
<doc xml:space="preserve">the value to append</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="concat" c:identifier="gst_value_list_concat">
<doc xml:space="preserve">Concatenates copies of @value1 and @value2 into a list. Values that are not
of type #GST_TYPE_LIST are treated as if they were lists of length 1.
@dest will be initialized to the type #GST_TYPE_LIST.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">an uninitialized #GValue to take the result</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="get_size" c:identifier="gst_value_list_get_size">
<doc xml:space="preserve">Gets the number of values contained in @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the number of values</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_LIST</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="get_value" c:identifier="gst_value_list_get_value">
<doc xml:space="preserve">Gets the value that is a member of the list contained in @value and
has the index @index.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the value at the given index</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_LIST</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="index" transfer-ownership="none">
<doc xml:space="preserve">index of value to get from the list</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="init" c:identifier="gst_value_list_init" version="1.18">
<doc xml:space="preserve">Initializes and pre-allocates a #GValue of type #GST_VALUE_LIST.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GValue structure that has been passed in</doc>
<type name="GObject.Value" c:type="GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">A zero-filled (uninitialized) #GValue structure</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="prealloc" transfer-ownership="none">
<doc xml:space="preserve">The number of entries to pre-allocate in the list</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="merge" c:identifier="gst_value_list_merge">
<doc xml:space="preserve">Merges copies of @value1 and @value2. Values that are not
of type #GST_TYPE_LIST are treated as if they were lists of length 1.
The result will be put into @dest and will either be a list that will not
contain any duplicates, or a non-list type (if @value1 and @value2
were equal).</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">an uninitialized #GValue to take the result</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="prepend_value" c:identifier="gst_value_list_prepend_value">
<doc xml:space="preserve">Prepends @prepend_value to the GstValueList in @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue of type #GST_TYPE_LIST</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="prepend_value" transfer-ownership="none">
<doc xml:space="preserve">the value to prepend</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
</class>
<callback name="ValueSerializeFunc" c:type="GstValueSerializeFunc">
<doc xml:space="preserve">Used by gst_value_serialize() to obtain a non-binary form of the #GValue.
Free-function: g_free</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the string representation of the value</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</callback>
<record name="ValueTable" c:type="GstValueTable">
<doc xml:space="preserve">VTable for the #GValue @type.</doc>
<field name="type" writable="1">
<doc xml:space="preserve">a #GType</doc>
<type name="GType" c:type="GType"/>
</field>
<field name="compare" writable="1">
<doc xml:space="preserve">a #GstValueCompareFunc</doc>
<type name="ValueCompareFunc" c:type="GstValueCompareFunc"/>
</field>
<field name="serialize" writable="1">
<doc xml:space="preserve">a #GstValueSerializeFunc</doc>
<type name="ValueSerializeFunc" c:type="GstValueSerializeFunc"/>
</field>
<field name="deserialize" writable="1">
<doc xml:space="preserve">a #GstValueDeserializeFunc</doc>
<type name="ValueDeserializeFunc" c:type="GstValueDeserializeFunc"/>
</field>
<field name="_gst_reserved" readable="0" private="1">
<array zero-terminated="0" fixed-size="4">
<type name="gpointer" c:type="gpointer"/>
</array>
</field>
</record>
<function-macro name="WRITE_UINT16_BE" c:identifier="GST_WRITE_UINT16_BE" introspectable="0">
<doc xml:space="preserve">Store a 16 bit unsigned integer value in big endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT16_LE" c:identifier="GST_WRITE_UINT16_LE" introspectable="0">
<doc xml:space="preserve">Store a 16 bit unsigned integer value in little endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT24_BE" c:identifier="GST_WRITE_UINT24_BE" introspectable="0">
<doc xml:space="preserve">Store a 24 bit unsigned integer value in big endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="num">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT24_LE" c:identifier="GST_WRITE_UINT24_LE" introspectable="0">
<doc xml:space="preserve">Store a 24 bit unsigned integer value in little endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="num">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT32_BE" c:identifier="GST_WRITE_UINT32_BE" introspectable="0">
<doc xml:space="preserve">Store a 32 bit unsigned integer value in big endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT32_LE" c:identifier="GST_WRITE_UINT32_LE" introspectable="0">
<doc xml:space="preserve">Store a 32 bit unsigned integer value in little endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT64_BE" c:identifier="GST_WRITE_UINT64_BE" introspectable="0">
<doc xml:space="preserve">Store a 64 bit unsigned integer value in big endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT64_LE" c:identifier="GST_WRITE_UINT64_LE" introspectable="0">
<doc xml:space="preserve">Store a 64 bit unsigned integer value in little endian format into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="val">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="WRITE_UINT8" c:identifier="GST_WRITE_UINT8" introspectable="0">
<doc xml:space="preserve">Store an 8 bit unsigned integer value into the memory buffer.</doc>
<parameters>
<parameter name="data">
<doc xml:space="preserve">memory location</doc>
</parameter>
<parameter name="num">
<doc xml:space="preserve">value to store</doc>
</parameter>
</parameters>
</function-macro>
<function name="buffer_get_max_memory" c:identifier="gst_buffer_get_max_memory" moved-to="Buffer.get_max_memory" version="1.2">
<doc xml:space="preserve">Get the maximum amount of memory blocks that a buffer can hold. This is a
compile time constant that can be queried with the function.
When more memory blocks are added, existing memory blocks will be merged
together to make room for the new block.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the maximum amount of memory blocks that a buffer can hold.</doc>
<type name="guint" c:type="guint"/>
</return-value>
</function>
<function-macro name="buffer_get_parent_buffer_meta" c:identifier="gst_buffer_get_parent_buffer_meta" introspectable="0">
<doc xml:space="preserve">Find and return a #GstParentBufferMeta if one exists on the
buffer</doc>
<parameters>
<parameter name="b">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_get_protection_meta" c:identifier="gst_buffer_get_protection_meta" introspectable="0">
<parameters>
<parameter name="b">
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_is_writable" c:identifier="gst_buffer_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely write to a buffer's metadata or its memory array.
It is only safe to change buffer metadata when the current reference is
writable, i.e. nobody can see the modifications you will make.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_list_add" c:identifier="gst_buffer_list_add" introspectable="0">
<doc xml:space="preserve">Append @b at the end of @l.</doc>
<parameters>
<parameter name="l">
<doc xml:space="preserve">a #GstBufferList</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_list_is_writable" c:identifier="gst_buffer_list_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely add buffers and groups into a buffer list.</doc>
<parameters>
<parameter name="list">
<doc xml:space="preserve">a #GstBufferList</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_list_make_writable" c:identifier="gst_buffer_list_make_writable" introspectable="0">
<doc xml:space="preserve">Makes a writable buffer list from the given buffer list. If the source buffer
list is already writable, this will simply return the same buffer list. A
copy will otherwise be made using gst_buffer_list_copy().</doc>
<parameters>
<parameter name="list">
<doc xml:space="preserve">a #GstBufferList</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_make_writable" c:identifier="gst_buffer_make_writable" introspectable="0">
<doc xml:space="preserve">Returns a writable copy of @buf. If the source buffer is
already writable, this will simply return the same buffer.
Use this function to ensure that a buffer can be safely modified before
making changes to it, including changing the metadata such as PTS/DTS.
If the reference count of the source buffer @buf is exactly one, the caller
is the sole owner and this function will return the buffer object unchanged.
If there is more than one reference on the object, a copy will be made using
gst_buffer_copy(). The passed-in @buf will be unreffed in that case, and the
caller will now own a reference to the new returned buffer object. Note
that this just copies the buffer structure itself, the underlying memory is
not copied if it can be shared amongst multiple buffers.
In short, this function unrefs the buf in the argument and refs the buffer
that it returns. Don't access the argument after calling this function unless
you have an additional reference to it.</doc>
<parameters>
<parameter name="buf">
<doc xml:space="preserve">a #GstBuffer</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="buffer_new_and_alloc" c:identifier="gst_buffer_new_and_alloc" introspectable="0">
<parameters>
<parameter name="s">
</parameter>
</parameters>
</function-macro>
<function name="buffer_replace" c:identifier="gst_buffer_replace" moved-to="Buffer.replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstBuffer to point to a different #GstBuffer. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
buffer is unreffed, the new is reffed).
Either @nbuf or the #GstBuffer pointed to by @obuf may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE when @obuf was different from @nbuf.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="obuf" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to
a #GstBuffer to be replaced.</doc>
<type name="Buffer" c:type="GstBuffer**"/>
</parameter>
<parameter name="nbuf" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstBuffer that will
replace the buffer pointed to by @obuf.</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</function>
<function name="calculate_linear_regression" c:identifier="gst_calculate_linear_regression" version="1.12" introspectable="0">
<doc xml:space="preserve">Calculates the linear regression of the values @xy and places the
result in @m_num, @m_denom, @b and @xbase, representing the function
y(x) = m_num/m_denom * (x - xbase) + b
that has the least-square distance from all points @x and @y.
@r_squared will contain the remaining error.
If @temp is not %NULL, it will be used as temporary space for the function,
in which case the function works without any allocation at all. If @temp is
%NULL, an allocation will take place. @temp should have at least the same
amount of memory allocated as @xy, i.e. 2*n*sizeof(GstClockTime).
&gt; This function assumes (x,y) values with reasonable large differences
&gt; between them. It will not calculate the exact results if the differences
&gt; between neighbouring values are too small due to not being able to
&gt; represent sub-integer values during the calculations.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the linear regression was successfully calculated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="xy" transfer-ownership="none">
<doc xml:space="preserve">Pairs of (x,y) values</doc>
<type name="ClockTime" c:type="const GstClockTime*"/>
</parameter>
<parameter name="temp" transfer-ownership="none">
<doc xml:space="preserve">Temporary scratch space used by the function</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="n" transfer-ownership="none">
<doc xml:space="preserve">number of (x,y) pairs</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="m_num" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">numerator of calculated slope</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="m_denom" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">denominator of calculated slope</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="b" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Offset at Y-axis</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="xbase" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Offset at X-axis</doc>
<type name="ClockTime" c:type="GstClockTime*"/>
</parameter>
<parameter name="r_squared" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">R-squared</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</function>
<function name="caps_features_from_string" c:identifier="gst_caps_features_from_string" moved-to="CapsFeatures.from_string" version="1.2">
<doc xml:space="preserve">Creates a #GstCapsFeatures from a string representation.
Free-function: gst_caps_features_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstCapsFeatures or
%NULL when the string could not be parsed. Free with
gst_caps_features_free() after use.</doc>
<type name="CapsFeatures" c:type="GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">a string representation of a #GstCapsFeatures.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="caps_from_string" c:identifier="gst_caps_from_string" moved-to="Caps.from_string">
<doc xml:space="preserve">Converts @caps from a string representation.
The current implementation of serialization will lead to unexpected results
when there are nested #GstCaps / #GstStructure deeper than one level.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly allocated #GstCaps</doc>
<type name="Caps" c:type="GstCaps*"/>
</return-value>
<parameters>
<parameter name="string" transfer-ownership="none">
<doc xml:space="preserve">a string to convert to #GstCaps</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function-macro name="caps_is_writable" c:identifier="gst_caps_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely modify @caps. It is only safe to modify caps when
there is only one owner of the caps - ie, the object is writable.</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="caps_make_writable" c:identifier="gst_caps_make_writable" introspectable="0">
<doc xml:space="preserve">Returns a writable copy of @caps.
If there is only one reference count on @caps, the caller must be the owner,
and so this function will return the caps object unchanged. If on the other
hand there is more than one reference on the object, a new caps object will
be returned. The caller's reference on @caps will be removed, and instead the
caller will own a reference to the returned object.
In short, this function unrefs the caps in the argument and refs the caps
that it returns. Don't access the argument after calling this function. See
also: gst_caps_ref().</doc>
<parameters>
<parameter name="caps">
<doc xml:space="preserve">a #GstCaps</doc>
</parameter>
</parameters>
</function-macro>
<function name="caps_replace" c:identifier="gst_caps_replace" moved-to="Caps.replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstCaps to point to a different #GstCaps. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
caps is unreffed, the new is reffed).
Either @new_caps or the #GstCaps pointed to by @old_caps may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_caps was different from @old_caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_caps" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer
to a #GstCaps to be replaced.</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="new_caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstCaps that will
replace the caps pointed to by @old_caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</function>
<function name="caps_take" c:identifier="gst_caps_take" moved-to="Caps.take" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstCaps to point to a different #GstCaps. This
function is similar to gst_caps_replace() except that it takes ownership
of @new_caps.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_caps was different from @old_caps</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_caps" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a #GstCaps to be
replaced.</doc>
<type name="Caps" c:type="GstCaps**"/>
</parameter>
<parameter name="new_caps" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstCaps that will
replace the caps pointed to by @old_caps.</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
</parameters>
</function>
<function name="clear_mini_object" c:identifier="gst_clear_mini_object" version="1.16" introspectable="0">
<doc xml:space="preserve">Clears a reference to a #GstMiniObject.
@object_ptr must not be %NULL.
If the reference is %NULL then this function does nothing.
Otherwise, the reference count of the object is decreased using
gst_mini_object_unref() and the pointer is set to %NULL.
A macro is also included that allows this function to be used without
pointer casts.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object_ptr" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GstMiniObject reference</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
</parameters>
</function>
<function name="clear_object" c:identifier="gst_clear_object" version="1.16" introspectable="0">
<doc xml:space="preserve">Clears a reference to a #GstObject.
@object_ptr must not be %NULL.
If the reference is %NULL then this function does nothing.
Otherwise, the reference count of the object is decreased using
gst_object_unref() and the pointer is set to %NULL.
A macro is also included that allows this function to be used without
pointer casts.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object_ptr" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GstObject reference</doc>
<type name="Object" c:type="GstObject**"/>
</parameter>
</parameters>
</function>
<function name="clear_structure" c:identifier="gst_clear_structure" version="1.16" introspectable="0">
<doc xml:space="preserve">Clears a reference to a #GstStructure.
@structure_ptr must not be %NULL.
If the reference is %NULL then this function does nothing.
Otherwise, the structure is free'd using gst_structure_free() and the
pointer is set to %NULL.
A macro is also included that allows this function to be used without
pointer casts.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="structure_ptr" transfer-ownership="none">
<doc xml:space="preserve">a pointer to a #GstStructure reference</doc>
<type name="Structure" c:type="GstStructure**"/>
</parameter>
</parameters>
</function>
<function-macro name="context_is_writable" c:identifier="gst_context_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely write into a context's structure or validly
modify the seqnum and timestamp fields.</doc>
<parameters>
<parameter name="context">
<doc xml:space="preserve">a #GstContext</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="context_make_writable" c:identifier="gst_context_make_writable" introspectable="0">
<doc xml:space="preserve">Checks if a context is writable. If not, a writable copy is made and
returned.</doc>
<parameters>
<parameter name="context">
<doc xml:space="preserve">the context to make writable</doc>
</parameter>
</parameters>
</function-macro>
<function name="core_error_quark" c:identifier="gst_core_error_quark" moved-to="CoreError.quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function name="debug_add_log_function" c:identifier="gst_debug_add_log_function">
<doc xml:space="preserve">Adds the logging function to the list of logging functions.
Be sure to use #G_GNUC_NO_INSTRUMENT on that function, it is needed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="func" transfer-ownership="none" scope="notified" closure="1" destroy="2">
<doc xml:space="preserve">the function to use</doc>
<type name="LogFunction" c:type="GstLogFunction"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">called when @user_data is not used anymore</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</function>
<function name="debug_add_ring_buffer_logger" c:identifier="gst_debug_add_ring_buffer_logger" version="1.14">
<doc xml:space="preserve">Adds a memory ringbuffer based debug logger that stores up to
@max_size_per_thread bytes of logs per thread and times out threads after
@thread_timeout seconds of inactivity.
Logs can be fetched with gst_debug_ring_buffer_logger_get_logs() and the
logger can be removed again with gst_debug_remove_ring_buffer_logger().
Only one logger at a time is possible.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="max_size_per_thread" transfer-ownership="none">
<doc xml:space="preserve">Maximum size of log per thread in bytes</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="thread_timeout" transfer-ownership="none">
<doc xml:space="preserve">Timeout for threads in seconds</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="debug_bin_to_dot_data" c:identifier="gst_debug_bin_to_dot_data">
<doc xml:space="preserve">To aid debugging applications one can use this method to obtain the whole
network of gstreamer elements that form the pipeline into an dot file.
This data can be processed with graphviz to get an image.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a string containing the pipeline in graphviz
dot format.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">the top-level pipeline that should be analyzed</doc>
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="details" transfer-ownership="none">
<doc xml:space="preserve">type of #GstDebugGraphDetails to use</doc>
<type name="DebugGraphDetails" c:type="GstDebugGraphDetails"/>
</parameter>
</parameters>
</function>
<function name="debug_bin_to_dot_file" c:identifier="gst_debug_bin_to_dot_file">
<doc xml:space="preserve">To aid debugging applications one can use this method to write out the whole
network of gstreamer elements that form the pipeline into an dot file.
This file can be processed with graphviz to get an image.
``` shell
dot -Tpng -oimage.png graph_lowlevel.dot
```</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">the top-level pipeline that should be analyzed</doc>
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="details" transfer-ownership="none">
<doc xml:space="preserve">type of #GstDebugGraphDetails to use</doc>
<type name="DebugGraphDetails" c:type="GstDebugGraphDetails"/>
</parameter>
<parameter name="file_name" transfer-ownership="none">
<doc xml:space="preserve">output base filename (e.g. "myplayer")</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="debug_bin_to_dot_file_with_ts" c:identifier="gst_debug_bin_to_dot_file_with_ts">
<doc xml:space="preserve">This works like gst_debug_bin_to_dot_file(), but adds the current timestamp
to the filename, so that it can be used to take multiple snapshots.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="bin" transfer-ownership="none">
<doc xml:space="preserve">the top-level pipeline that should be analyzed</doc>
<type name="Bin" c:type="GstBin*"/>
</parameter>
<parameter name="details" transfer-ownership="none">
<doc xml:space="preserve">type of #GstDebugGraphDetails to use</doc>
<type name="DebugGraphDetails" c:type="GstDebugGraphDetails"/>
</parameter>
<parameter name="file_name" transfer-ownership="none">
<doc xml:space="preserve">output base filename (e.g. "myplayer")</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="debug_construct_term_color" c:identifier="gst_debug_construct_term_color">
<doc xml:space="preserve">Constructs a string that can be used for getting the desired color in color
terminals.
You need to free the string after use.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a string containing the color
definition</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="colorinfo" transfer-ownership="none">
<doc xml:space="preserve">the color info</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="debug_construct_win_color" c:identifier="gst_debug_construct_win_color">
<doc xml:space="preserve">Constructs an integer that can be used for getting the desired color in
windows' terminals (cmd.exe). As there is no mean to underline, we simply
ignore this attribute.
This function returns 0 on non-windows machines.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">an integer containing the color definition</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="colorinfo" transfer-ownership="none">
<doc xml:space="preserve">the color info</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="debug_get_all_categories" c:identifier="gst_debug_get_all_categories">
<doc xml:space="preserve">Returns a snapshot of a all categories that are currently in use . This list
may change anytime.
The caller has to free the list after use.</doc>
<return-value transfer-ownership="container">
<doc xml:space="preserve">the list of
debug categories</doc>
<type name="GLib.SList" c:type="GSList*">
<type name="DebugCategory"/>
</type>
</return-value>
</function>
<function name="debug_get_color_mode" c:identifier="gst_debug_get_color_mode" version="1.2">
<doc xml:space="preserve">Changes the coloring mode for debug output.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">see @GstDebugColorMode for possible values.</doc>
<type name="DebugColorMode" c:type="GstDebugColorMode"/>
</return-value>
</function>
<function name="debug_get_default_threshold" c:identifier="gst_debug_get_default_threshold">
<doc xml:space="preserve">Returns the default threshold that is used for new categories.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the default threshold level</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</return-value>
</function>
<function name="debug_get_stack_trace" c:identifier="gst_debug_get_stack_trace" version="1.12">
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a stack trace, if libunwind or glibc backtrace are
present, else %NULL.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">A set of #GstStackTraceFlags to determine how the stack trace should
look like. Pass #GST_STACK_TRACE_SHOW_NONE to retrieve a minimal backtrace.</doc>
<type name="StackTraceFlags" c:type="GstStackTraceFlags"/>
</parameter>
</parameters>
</function>
<function name="debug_is_active" c:identifier="gst_debug_is_active">
<doc xml:space="preserve">Checks if debugging output is activated.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if debugging is activated</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="debug_is_colored" c:identifier="gst_debug_is_colored">
<doc xml:space="preserve">Checks if the debugging output should be colored.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the debug output should be colored.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="debug_level_get_name" c:identifier="gst_debug_level_get_name" moved-to="DebugLevel.get_name">
<doc xml:space="preserve">Get the string representation of a debugging level</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the name</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">the level to get the name for</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
</parameters>
</function>
<function name="debug_log" c:identifier="gst_debug_log" introspectable="0">
<doc xml:space="preserve">Logs the given message using the currently registered debugging handlers.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">category to log</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level of the message is in</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the file that emitted the message, usually the __FILE__ identifier</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the function that emitted the message</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the line from that the message was emitted, usually __LINE__</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="object" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the object this message relates to,
or %NULL if none</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">optional arguments for the format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="debug_log_default" c:identifier="gst_debug_log_default">
<doc xml:space="preserve">The default logging handler used by GStreamer. Logging functions get called
whenever a macro like GST_DEBUG or similar is used. By default this function
is setup to output the message and additional info to stderr (or the log file
specified via the GST_DEBUG_FILE environment variable) as received via
@user_data.
You can add other handlers by using gst_debug_add_log_function().
And you can remove this handler by calling
gst_debug_remove_log_function(gst_debug_log_default);</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">category to log</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level of the message</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the file that emitted the message, usually the __FILE__ identifier</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the function that emitted the message</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the line from that the message was emitted, usually __LINE__</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="object" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the object this message relates to,
or %NULL if none</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the actual message</doc>
<type name="DebugMessage" c:type="GstDebugMessage*"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the FILE* to log to</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</function>
<function name="debug_log_get_line" c:identifier="gst_debug_log_get_line" version="1.18">
<doc xml:space="preserve">Returns the string representation for the specified debug log message
formatted in the same way as gst_debug_log_default() (the default handler),
without color. The purpose is to make it easy for custom log output
handlers to get a log output that is identical to what the default handler
would write out.</doc>
<return-value transfer-ownership="full">
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">category to log</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level of the message</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the file that emitted the message, usually the __FILE__ identifier</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the function that emitted the message</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the line from that the message was emitted, usually __LINE__</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="object" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the object this message relates to,
or %NULL if none</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="message" transfer-ownership="none">
<doc xml:space="preserve">the actual message</doc>
<type name="DebugMessage" c:type="GstDebugMessage*"/>
</parameter>
</parameters>
</function>
<function name="debug_log_valist" c:identifier="gst_debug_log_valist" introspectable="0">
<doc xml:space="preserve">Logs the given message using the currently registered debugging handlers.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="category" transfer-ownership="none">
<doc xml:space="preserve">category to log</doc>
<type name="DebugCategory" c:type="GstDebugCategory*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level of the message is in</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
<parameter name="file" transfer-ownership="none">
<doc xml:space="preserve">the file that emitted the message, usually the __FILE__ identifier</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="function" transfer-ownership="none">
<doc xml:space="preserve">the function that emitted the message</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="line" transfer-ownership="none">
<doc xml:space="preserve">the line from that the message was emitted, usually __LINE__</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="object" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the object this message relates to,
or %NULL if none</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="args" transfer-ownership="none">
<doc xml:space="preserve">optional arguments for the format</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</function>
<function name="debug_print_stack_trace" c:identifier="gst_debug_print_stack_trace">
<doc xml:space="preserve">If libunwind, glibc backtrace or DbgHelp are present
a stack trace is printed.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</function>
<function name="debug_remove_log_function" c:identifier="gst_debug_remove_log_function">
<doc xml:space="preserve">Removes all registered instances of the given logging functions.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">How many instances of the function were removed</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="func" transfer-ownership="none" nullable="1" allow-none="1" scope="call">
<doc xml:space="preserve">the log function to remove, or %NULL to
remove the default log function</doc>
<type name="LogFunction" c:type="GstLogFunction"/>
</parameter>
</parameters>
</function>
<function name="debug_remove_log_function_by_data" c:identifier="gst_debug_remove_log_function_by_data">
<doc xml:space="preserve">Removes all registered instances of log functions with the given user data.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">How many instances of the function were removed</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">user data of the log function to remove</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</function>
<function name="debug_remove_ring_buffer_logger" c:identifier="gst_debug_remove_ring_buffer_logger" version="1.14">
<doc xml:space="preserve">Removes any previously added ring buffer logger with
gst_debug_add_ring_buffer_logger().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</function>
<function name="debug_ring_buffer_logger_get_logs" c:identifier="gst_debug_ring_buffer_logger_get_logs" version="1.14">
<doc xml:space="preserve">Fetches the current logs per thread from the ring buffer logger. See
gst_debug_add_ring_buffer_logger() for details.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">NULL-terminated array of
strings with the debug output per thread</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
</function>
<function name="debug_set_active" c:identifier="gst_debug_set_active">
<doc xml:space="preserve">If activated, debugging messages are sent to the debugging
handlers.
It makes sense to deactivate it for speed issues.
&gt; This function is not threadsafe. It makes sense to only call it
during initialization.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="active" transfer-ownership="none">
<doc xml:space="preserve">Whether to use debugging output or not</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="debug_set_color_mode" c:identifier="gst_debug_set_color_mode" version="1.2">
<doc xml:space="preserve">Changes the coloring mode for debug output.
This function may be called before gst_init().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">The coloring mode for debug output. See @GstDebugColorMode.</doc>
<type name="DebugColorMode" c:type="GstDebugColorMode"/>
</parameter>
</parameters>
</function>
<function name="debug_set_color_mode_from_string" c:identifier="gst_debug_set_color_mode_from_string" version="1.2">
<doc xml:space="preserve">Changes the coloring mode for debug output.
This function may be called before gst_init().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">The coloring mode for debug output. One of the following:
"on", "auto", "off", "disable", "unix".</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="debug_set_colored" c:identifier="gst_debug_set_colored">
<doc xml:space="preserve">Sets or unsets the use of coloured debugging output.
Same as gst_debug_set_color_mode () with the argument being
being GST_DEBUG_COLOR_MODE_ON or GST_DEBUG_COLOR_MODE_OFF.
This function may be called before gst_init().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="colored" transfer-ownership="none">
<doc xml:space="preserve">Whether to use colored output or not</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="debug_set_default_threshold" c:identifier="gst_debug_set_default_threshold">
<doc xml:space="preserve">Sets the default threshold to the given level and updates all categories to
use this threshold.
This function may be called before gst_init().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level to set</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
</parameters>
</function>
<function name="debug_set_threshold_for_name" c:identifier="gst_debug_set_threshold_for_name">
<doc xml:space="preserve">Sets all categories which match the given glob style pattern to the given
level.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of the categories to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="level" transfer-ownership="none">
<doc xml:space="preserve">level to set them to</doc>
<type name="DebugLevel" c:type="GstDebugLevel"/>
</parameter>
</parameters>
</function>
<function name="debug_set_threshold_from_string" c:identifier="gst_debug_set_threshold_from_string" version="1.2">
<doc xml:space="preserve">Sets the debug logging wanted in the same form as with the GST_DEBUG
environment variable. You can use wildcards such as '*', but note that
the order matters when you use wild cards, e.g. "foosrc:6,*src:3,*:2" sets
everything to log level 2.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">comma-separated list of "category:level" pairs to be used
as debug logging levels</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="reset" transfer-ownership="none">
<doc xml:space="preserve">%TRUE to clear all previously-set debug levels before setting
new thresholds
%FALSE if adding the threshold described by @list to the one already set.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="debug_unset_threshold_for_name" c:identifier="gst_debug_unset_threshold_for_name">
<doc xml:space="preserve">Resets all categories with the given name back to the default level.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">name of the categories to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="deinit" c:identifier="gst_deinit">
<doc xml:space="preserve">Clean up any resources created by GStreamer in gst_init().
It is normally not needed to call this function in a normal application
as the resources will automatically be freed when the program terminates.
This function is therefore mostly used by testsuites and other memory
profiling tools.
After this call GStreamer (including this method) should not be used anymore.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
</function>
<function name="dynamic_type_register" c:identifier="gst_dynamic_type_register" version="1.12">
<doc xml:space="preserve">Registers a new #GstDynamicTypeFactory in the registry</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none">
<doc xml:space="preserve">The #GstPlugin to register @dyn_type for</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">The #GType to register dynamically</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<function-macro name="element_factory_get_author" c:identifier="gst_element_factory_get_author" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_factory_get_description" c:identifier="gst_element_factory_get_description" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_factory_get_documentation_uri" c:identifier="gst_element_factory_get_documentation_uri" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_factory_get_icon_name" c:identifier="gst_element_factory_get_icon_name" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_factory_get_klass" c:identifier="gst_element_factory_get_klass" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_factory_get_longname" c:identifier="gst_element_factory_get_longname" introspectable="0">
<parameters>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="element_get_name" c:identifier="gst_element_get_name" introspectable="0">
<doc xml:space="preserve">Returns a copy of the name of @elem.
Caller should g_free() the return value after usage.
For a nameless element, this returns %NULL, which you can safely g_free()
as well.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to get the name of @elem.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="element_get_parent" c:identifier="gst_element_get_parent" introspectable="0">
<doc xml:space="preserve">Get the parent of an element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to get the parent of.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="element_set_name" c:identifier="gst_element_set_name" introspectable="0">
<doc xml:space="preserve">Sets the name of the element, getting rid of the old name if there was one.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to set the name of.</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">the new name</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="element_set_parent" c:identifier="gst_element_set_parent" introspectable="0">
<doc xml:space="preserve">Sets the parent of an element.</doc>
<parameters>
<parameter name="elem">
<doc xml:space="preserve">a #GstElement to set the parent of.</doc>
</parameter>
<parameter name="parent">
<doc xml:space="preserve">the new parent #GstObject of the element.</doc>
</parameter>
</parameters>
</function-macro>
<function name="error_get_message" c:identifier="gst_error_get_message">
<doc xml:space="preserve">Get a string describing the error message in the current locale.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated string describing
the error message (in UTF-8 encoding)</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="domain" transfer-ownership="none">
<doc xml:space="preserve">the GStreamer error domain this error belongs to.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
<parameter name="code" transfer-ownership="none">
<doc xml:space="preserve">the error code belonging to the domain.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function-macro name="event_is_writable" c:identifier="gst_event_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely write data into a event's structure or validly
modify the seqnum and timestamp field.</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">a #GstEvent</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="event_make_writable" c:identifier="gst_event_make_writable" introspectable="0">
<doc xml:space="preserve">Makes a writable event from the given event. If the source event is
already writable, this will simply return the same event. A copy will
otherwise be made using gst_event_copy().</doc>
<parameters>
<parameter name="ev">
<doc xml:space="preserve">a #GstEvent</doc>
</parameter>
</parameters>
</function-macro>
<function name="event_replace" c:identifier="gst_event_replace" moved-to="Event.replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
event is unreffed, the new one is reffed).
Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_event was different from @old_event</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be replaced.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
<parameter name="new_event" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstEvent that will
replace the event pointed to by @old_event.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</function>
<function name="event_steal" c:identifier="gst_event_steal" moved-to="Event.steal" introspectable="0">
<doc xml:space="preserve">Atomically replace the #GstEvent pointed to by @old_event with %NULL and
return the original event.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">the #GstEvent that was in @old_event</doc>
<type name="Event" c:type="GstEvent*"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be stolen.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
</parameters>
</function>
<function name="event_take" c:identifier="gst_event_take" moved-to="Event.take" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
function is similar to gst_event_replace() except that it takes ownership of
@new_event.
Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_event was different from @old_event</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_event" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstEvent to be stolen.</doc>
<type name="Event" c:type="GstEvent**"/>
</parameter>
<parameter name="new_event" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstEvent that will
replace the event pointed to by @old_event.</doc>
<type name="Event" c:type="GstEvent*"/>
</parameter>
</parameters>
</function>
<function name="event_type_get_flags" c:identifier="gst_event_type_get_flags" moved-to="EventType.get_flags">
<doc xml:space="preserve">Gets the #GstEventTypeFlags associated with @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstEventTypeFlags.</doc>
<type name="EventTypeFlags" c:type="GstEventTypeFlags"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstEventType</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
<function name="event_type_get_name" c:identifier="gst_event_type_get_name" moved-to="EventType.get_name">
<doc xml:space="preserve">Get a printable name for the given event type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the event.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the event type</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
<function name="event_type_to_quark" c:identifier="gst_event_type_to_quark" moved-to="EventType.to_quark">
<doc xml:space="preserve">Get the unique quark for the given event type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the event type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the event type</doc>
<type name="EventType" c:type="GstEventType"/>
</parameter>
</parameters>
</function>
<function name="filename_to_uri" c:identifier="gst_filename_to_uri" throws="1">
<doc xml:space="preserve">Similar to g_filename_to_uri(), but attempts to handle relative file paths
as well. Before converting @filename into an URI, it will be prefixed by
the current working directory if it is a relative path, and then the path
will be canonicalised so that it doesn't contain any './' or '../' segments.
On Windows @filename should be in UTF-8 encoding.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">newly-allocated URI string, or NULL on error. The caller must
free the URI string with g_free() when no longer needed.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="filename" transfer-ownership="none">
<doc xml:space="preserve">absolute or relative file name path</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="flow_get_name" c:identifier="gst_flow_get_name">
<doc xml:space="preserve">Gets a string representing the given flow return.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a static string with the name of the flow return.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn to get the name of.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</parameter>
</parameters>
</function>
<function name="flow_to_quark" c:identifier="gst_flow_to_quark">
<doc xml:space="preserve">Get the unique quark for the given GstFlowReturn.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the flow return or 0 if an
invalid return was specified.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="ret" transfer-ownership="none">
<doc xml:space="preserve">a #GstFlowReturn to get the quark of.</doc>
<type name="FlowReturn" c:type="GstFlowReturn"/>
</parameter>
</parameters>
</function>
<function name="format_get_by_nick" c:identifier="gst_format_get_by_nick" moved-to="Format.get_by_nick">
<doc xml:space="preserve">Return the format registered with the given nick.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The format with @nick or GST_FORMAT_UNDEFINED
if the format was not registered.</doc>
<type name="Format" c:type="GstFormat"/>
</return-value>
<parameters>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">The nick of the format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="format_get_details" c:identifier="gst_format_get_details" moved-to="Format.get_details">
<doc xml:space="preserve">Get details about the given format.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The #GstFormatDefinition for @format or %NULL
on failure.
MT safe.</doc>
<type name="FormatDefinition" c:type="const GstFormatDefinition*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">The format to get details of</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function name="format_get_name" c:identifier="gst_format_get_name" moved-to="Format.get_name">
<doc xml:space="preserve">Get a printable name for the given format. Do not modify or free.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a reference to the static name of the format
or %NULL if the format is unknown.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function name="format_iterate_definitions" c:identifier="gst_format_iterate_definitions" moved-to="Format.iterate_definitions">
<doc xml:space="preserve">Iterate all the registered formats. The format definition is read
only.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a GstIterator of #GstFormatDefinition.</doc>
<type name="Iterator" c:type="GstIterator*"/>
</return-value>
</function>
<function name="format_register" c:identifier="gst_format_register" moved-to="Format.register">
<doc xml:space="preserve">Create a new GstFormat based on the nick or return an
already registered format with that nick.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A new GstFormat or an already registered format
with the same nick.
MT safe.</doc>
<type name="Format" c:type="GstFormat"/>
</return-value>
<parameters>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">The nick of the new format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="description" transfer-ownership="none">
<doc xml:space="preserve">The description of the new format</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="format_to_quark" c:identifier="gst_format_to_quark" moved-to="Format.to_quark">
<doc xml:space="preserve">Get the unique quark for the given format.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the format or 0 if the format
is unknown.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a #GstFormat</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function name="formats_contains" c:identifier="gst_formats_contains">
<doc xml:space="preserve">See if the given format is inside the format array.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the format is found inside the array</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="formats" transfer-ownership="none">
<doc xml:space="preserve">The format array to search</doc>
<array c:type="const GstFormat*">
<type name="Format" c:type="GstFormat"/>
</array>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">the format to find</doc>
<type name="Format" c:type="GstFormat"/>
</parameter>
</parameters>
</function>
<function-macro name="gdouble_to_guint64" c:identifier="gst_gdouble_to_guint64" introspectable="0">
<doc xml:space="preserve">Convert @value to a guint64.</doc>
<parameters>
<parameter name="value">
<doc xml:space="preserve">the #gdouble value to convert</doc>
</parameter>
</parameters>
</function-macro>
<function name="get_main_executable_path" c:identifier="gst_get_main_executable_path" version="1.14">
<doc xml:space="preserve">This helper is mostly helpful for plugins that need to
inspect the folder of the main executable to determine
their set of features.
When a plugin is initialized from the gst-plugin-scanner
external process, the returned path will be the same as from the
parent process.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The path of the executable that
initialized GStreamer, or %NULL if it could not be determined.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
</function>
<docsection name="gst">
<doc xml:space="preserve">GStreamer is a framework for constructing graphs of various filters
(termed elements here) that will handle streaming media. Any discrete
(packetizable) media type is supported, with provisions for automatically
determining source type. Formatting/framing information is provided with
a powerful negotiation framework. Plugins are heavily used to provide for
all elements, allowing one to construct plugins outside of the GST
library, even released binary-only if license require (please don't).
GStreamer covers a wide range of use cases including: playback, recording,
editing, serving streams, voice over ip and video calls.
The `GStreamer` library should be initialized with
gst_init() before it can be used. You should pass pointers to the main argc
and argv variables so that GStreamer can process its own command line
options, as shown in the following example.
## Initializing the gstreamer library
|[ &lt;!-- language="C" --&gt;
int
main (int argc, char *argv[])
{
// initialize the GStreamer library
gst_init (&amp;amp;argc, &amp;amp;argv);
...
}
]|
It's allowed to pass two %NULL pointers to gst_init() in case you don't want
to pass the command line args to GStreamer.
You can also use GOption to initialize your own parameters as shown in
the next code fragment:
## Initializing own parameters when initializing gstreamer
|[ &lt;!-- language="C" --&gt;
static gboolean stats = FALSE;
...
int
main (int argc, char *argv[])
{
GOptionEntry options[] = {
{"tags", 't', 0, G_OPTION_ARG_NONE, &amp;amp;tags,
N_("Output tags (also known as metadata)"), NULL},
{NULL}
};
ctx = g_option_context_new ("[ADDITIONAL ARGUMENTS]");
g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE);
g_option_context_add_group (ctx, gst_init_get_option_group ());
if (!g_option_context_parse (ctx, &amp;amp;argc, &amp;amp;argv, &amp;amp;err)) {
g_print ("Error initializing: &amp;percnt;s\n", GST_STR_NULL (err-&gt;message));
exit (1);
}
g_option_context_free (ctx);
...
}
]|
Use gst_version() to query the library version at runtime or use the
GST_VERSION_* macros to find the version at compile time. Optionally
gst_version_string() returns a printable string.
The gst_deinit() call is used to clean up all internal resources used
by GStreamer. It is mostly used in unit tests to check for leaks.</doc>
</docsection>
<docsection name="gstcompat">
<doc xml:space="preserve">Please do not use these in new code.
These symbols are only available by defining GST_DISABLE_DEPRECATED.
This can be done in CFLAGS for compiling old code.</doc>
</docsection>
<docsection name="gsterror">
<doc xml:space="preserve">GStreamer elements can throw non-fatal warnings and fatal errors.
Higher-level elements and applications can programmatically filter
the ones they are interested in or can recover from,
and have a default handler handle the rest of them.
The rest of this section will use the term "error"
to mean both (non-fatal) warnings and (fatal) errors; they are treated
similarly.
Errors from elements are the combination of a #GError and a debug string.
The #GError contains:
- a domain type: CORE, LIBRARY, RESOURCE or STREAM
- a code: an enum value specific to the domain
- a translated, human-readable message
- a non-translated additional debug string, which also contains
- file and line information
Elements do not have the context required to decide what to do with
errors. As such, they should only inform about errors, and stop their
processing. In short, an element doesn't know what it is being used for.
It is the application or compound element using the given element that
has more context about the use of the element. Errors can be received by
listening to the #GstBus of the element/pipeline for #GstMessage objects with
the type %GST_MESSAGE_ERROR or %GST_MESSAGE_WARNING. The thrown errors should
be inspected, and filtered if appropriate.
An application is expected to, by default, present the user with a
dialog box (or an equivalent) showing the error message. The dialog
should also allow a way to get at the additional debug information,
so the user can provide bug reporting information.
A compound element is expected to forward errors by default higher up
the hierarchy; this is done by default in the same way as for other types
of #GstMessage.
When applications or compound elements trigger errors that they can
recover from, they can filter out these errors and take appropriate action.
For example, an application that gets an error from xvimagesink
that indicates all XVideo ports are taken, the application can attempt
to use another sink instead.
Elements throw errors using the #GST_ELEMENT_ERROR convenience macro:
## Throwing an error
|[
GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND,
(_("No file name specified for reading.")), (NULL));
]|
Things to keep in mind:
* Don't go off inventing new error codes. The ones
currently provided should be enough. If you find your type of error
does not fit the current codes, you should use FAILED.
* Don't provide a message if the default one suffices.
this keeps messages more uniform. Use (%NULL) - not forgetting the
parentheses.
* If you do supply a custom message, it should be
marked for translation. The message should start with a capital
and end with a period. The message should describe the error in short,
in a human-readable form, and without any complex technical terms.
A user interface will present this message as the first thing a user
sees. Details, technical info, ... should go in the debug string.
* The debug string can be as you like. Again, use (%NULL)
if there's nothing to add - file and line number will still be
passed. #GST_ERROR_SYSTEM can be used as a shortcut to give
debug information on a system call error.</doc>
</docsection>
<docsection name="gstformat">
<doc xml:space="preserve">GstFormats functions are used to register a new format to the gstreamer
core. Formats can be used to perform seeking or conversions/query
operations.</doc>
</docsection>
<docsection name="gstinfo">
<doc xml:space="preserve">GStreamer's debugging subsystem is an easy way to get information about what
the application is doing. It is not meant for programming errors. Use GLib
methods (g_warning and friends) for that.
The debugging subsystem works only after GStreamer has been initialized
- for example by calling gst_init().
The debugging subsystem is used to log informational messages while the
application runs. Each messages has some properties attached to it. Among
these properties are the debugging category, the severity (called "level"
here) and an optional #GObject it belongs to. Each of these messages is sent
to all registered debugging handlers, which then handle the messages.
GStreamer attaches a default handler on startup, which outputs requested
messages to stderr.
Messages are output by using shortcut macros like #GST_DEBUG,
#GST_CAT_ERROR_OBJECT or similar. These all expand to calling gst_debug_log()
with the right parameters.
The only thing a developer will probably want to do is define his own
categories. This is easily done with 3 lines. At the top of your code,
declare
the variables and set the default category.
|[&lt;!-- language="C" --&gt;
GST_DEBUG_CATEGORY_STATIC (my_category); // define category (statically)
#define GST_CAT_DEFAULT my_category // set as default
]|
After that you only need to initialize the category.
|[&lt;!-- language="C" --&gt;
GST_DEBUG_CATEGORY_INIT (my_category, "my category",
0, "This is my very own");
]|
Initialization must be done before the category is used first.
Plugins do this
in their plugin_init function, libraries and applications should do that
during their initialization.
The whole debugging subsystem can be disabled at build time with passing the
--disable-gst-debug switch to configure. If this is done, every function,
macro and even structs described in this file evaluate to default values or
nothing at all.
So don't take addresses of these functions or use other tricks.
If you must do that for some reason, there is still an option.
If the debugging
subsystem was compiled out, GST_DISABLE_GST_DEBUG is defined in
&amp;lt;gst/gst.h&amp;gt;,
so you can check that before doing your trick.
Disabling the debugging subsystem will give you a slight (read: unnoticeable)
speed increase and will reduce the size of your compiled code. The GStreamer
library itself becomes around 10% smaller.
Please note that there are naming conventions for the names of debugging
categories. These are explained at GST_DEBUG_CATEGORY_INIT().</doc>
</docsection>
<docsection name="gstparamspec">
<doc xml:space="preserve">GParamSpec implementations specific to GStreamer.</doc>
</docsection>
<docsection name="gstparse">
<doc xml:space="preserve">These function allow to create a pipeline based on the syntax used in the
gst-launch-1.0 utility (see man-page for syntax documentation).
Please note that these functions take several measures to create
somewhat dynamic pipelines. Due to that such pipelines are not always
reusable (set the state to NULL and back to PLAYING).</doc>
</docsection>
<docsection name="gstprotection">
<doc xml:space="preserve">The GstProtectionMeta class enables the information needed to decrypt a
#GstBuffer to be attached to that buffer.
Typically, a demuxer element would attach GstProtectionMeta objects
to the buffers that it pushes downstream. The demuxer would parse the
protection information for a video/audio frame from its input data and use
this information to populate the #GstStructure @info field,
which is then encapsulated in a GstProtectionMeta object and attached to
the corresponding output buffer using the gst_buffer_add_protection_meta()
function. The information in this attached GstProtectionMeta would be
used by a downstream decrypter element to recover the original unencrypted
frame.</doc>
</docsection>
<docsection name="gststreams">
<doc xml:space="preserve">A #GstStream is a high-level object defining a stream of data which is, or
can be, present in a #GstPipeline.
It is defined by a unique identifier, a "Stream ID". A #GstStream does not
automatically imply the stream is present within a pipeline or element.
Any element that can introduce new streams in a pipeline should create the
appropriate #GstStream object, and can convey that object via the
%GST_EVENT_STREAM_START event and/or the #GstStreamCollection.
Elements that do not modify the nature of the stream can add extra information
on it (such as enrich the #GstCaps, or #GstTagList). This is typically done
by parsing elements.</doc>
</docsection>
<docsection name="gstvalue">
<doc xml:space="preserve">GValue implementations specific to GStreamer.
Note that operations on the same #GValue from multiple threads may lead to
undefined behaviour.</doc>
</docsection>
<docsection name="gstversion">
<doc xml:space="preserve">Use the GST_VERSION_* macros e.g. when defining own plugins. The GStreamer
runtime checks if these plugin and core version match and refuses to use a
plugin compiled against a different version of GStreamer.
You can also use the macros to keep the GStreamer version information in
your application.
Use the gst_version() function if you want to know which version of
GStreamer you are currently linked against.
The version macros get defined by including "gst/gst.h".</doc>
</docsection>
<function-macro name="guint64_to_gdouble" c:identifier="gst_guint64_to_gdouble" introspectable="0">
<doc xml:space="preserve">Convert @value to a gdouble.</doc>
<parameters>
<parameter name="value">
<doc xml:space="preserve">the #guint64 value to convert</doc>
</parameter>
</parameters>
</function-macro>
<function name="info_strdup_printf" c:identifier="gst_info_strdup_printf" version="1.8" introspectable="0">
<doc xml:space="preserve">Allocates, fills and returns a 0-terminated string from the printf style
@format string and corresponding arguments.
See gst_info_vasprintf() for when this function is required.
Free with g_free().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly allocated null terminated string or %NULL on any error</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the printf arguments for @format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="info_strdup_vprintf" c:identifier="gst_info_strdup_vprintf" version="1.8" introspectable="0">
<doc xml:space="preserve">Allocates, fills and returns a null terminated string from the printf style
@format string and @args.
See gst_info_vasprintf() for when this function is required.
Free with g_free().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly allocated null terminated string or %NULL on any error</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="args" transfer-ownership="none">
<doc xml:space="preserve">the va_list of printf arguments for @format</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</function>
<function name="info_vasprintf" c:identifier="gst_info_vasprintf" version="1.8" introspectable="0">
<doc xml:space="preserve">Allocates and fills a string large enough (including the terminating null
byte) to hold the specified printf style @format and @args.
This function deals with the GStreamer specific printf specifiers
#GST_PTR_FORMAT and #GST_SEGMENT_FORMAT. If you do not have these specifiers
in your @format string, you do not need to use this function and can use
alternatives such as g_vasprintf().
Free @result with g_free().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the length of the string allocated into @result or -1 on any error</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="result" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">the resulting string</doc>
<type name="utf8" c:type="gchar**"/>
</parameter>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="args" transfer-ownership="none">
<doc xml:space="preserve">the va_list of printf arguments for @format</doc>
<type name="va_list" c:type="va_list"/>
</parameter>
</parameters>
</function>
<function name="init" c:identifier="gst_init">
<doc xml:space="preserve">Initializes the GStreamer library, setting up internal path lists,
registering built-in elements, and loading standard plugins.
Unless the plugin registry is disabled at compile time, the registry will be
loaded. By default this will also check if the registry cache needs to be
updated and rescan all plugins if needed. See gst_update_registry() for
details and section
&lt;link linkend="gst-running"&gt;Running GStreamer Applications&lt;/link&gt;
for how to disable automatic registry updates.
&gt; This function will terminate your program if it was unable to initialize
&gt; GStreamer for some reason. If you want your program to fall back,
&gt; use gst_init_check() instead.
WARNING: This function does not work in the same way as corresponding
functions in other glib-style libraries, such as gtk_init\(\). In
particular, unknown command line options cause this function to
abort program execution.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="argc" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to application's argc</doc>
<type name="gint" c:type="int*"/>
</parameter>
<parameter name="argv" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to application's argv</doc>
<array length="0" zero-terminated="0" c:type="char***">
<type name="utf8" c:type="char**"/>
</array>
</parameter>
</parameters>
</function>
<function name="init_check" c:identifier="gst_init_check" throws="1">
<doc xml:space="preserve">Initializes the GStreamer library, setting up internal path lists,
registering built-in elements, and loading standard plugins.
This function will return %FALSE if GStreamer could not be initialized
for some reason. If you want your program to fail fatally,
use gst_init() instead.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if GStreamer could be initialized.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="argc" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to application's argc</doc>
<type name="gint" c:type="int*"/>
</parameter>
<parameter name="argv" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to application's argv</doc>
<array length="0" zero-terminated="0" c:type="char***">
<type name="utf8" c:type="char**"/>
</array>
</parameter>
</parameters>
</function>
<function name="init_get_option_group" c:identifier="gst_init_get_option_group" introspectable="0">
<doc xml:space="preserve">Returns a #GOptionGroup with GStreamer's argument specifications. The
group is set up to use standard GOption callbacks, so when using this
group in combination with GOption parsing methods, all argument parsing
and initialization is automated.
This function is useful if you want to integrate GStreamer with other
libraries that use GOption (see g_option_context_add_group() ).
If you use this function, you should make sure you initialise the GLib
threading system as one of the very first things in your program
(see the example at the beginning of this section).</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a pointer to GStreamer's option group.</doc>
<type name="GLib.OptionGroup" c:type="GOptionGroup*"/>
</return-value>
</function>
<function name="is_caps_features" c:identifier="gst_is_caps_features">
<doc xml:space="preserve">Checks if @obj is a #GstCapsFeatures</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @obj is a #GstCapsFeatures %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="obj" transfer-ownership="none" nullable="1" allow-none="1">
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
</parameters>
</function>
<function name="is_initialized" c:identifier="gst_is_initialized">
<doc xml:space="preserve">Use this function to check if GStreamer has been initialized with gst_init()
or gst_init_check().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if initialization has been done, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="library_error_quark" c:identifier="gst_library_error_quark" moved-to="LibraryError.quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function name="make_element_message_details" c:identifier="gst_make_element_message_details" version="1.10" introspectable="0">
<doc xml:space="preserve">Create a #GstStructure to be used with #gst_element_message_full_with_details</doc>
<return-value transfer-ownership="full">
<type name="Structure" c:type="GstStructure*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">Name of the first field to set</doc>
<type name="utf8" c:type="const char*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">variable arguments in the same form as #GstStructure</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function-macro name="memory_is_writable" c:identifier="gst_memory_is_writable" introspectable="0">
<parameters>
<parameter name="m">
</parameter>
</parameters>
</function-macro>
<function-macro name="memory_lock" c:identifier="gst_memory_lock" introspectable="0">
<parameters>
<parameter name="m">
</parameter>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="memory_make_writable" c:identifier="gst_memory_make_writable" introspectable="0">
<parameters>
<parameter name="m">
</parameter>
</parameters>
</function-macro>
<function-macro name="memory_unlock" c:identifier="gst_memory_unlock" introspectable="0">
<parameters>
<parameter name="m">
</parameter>
<parameter name="f">
</parameter>
</parameters>
</function-macro>
<function-macro name="message_is_writable" c:identifier="gst_message_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely write into a message's structure or validly
modify the seqnum and timestamp fields.</doc>
<parameters>
<parameter name="msg">
<doc xml:space="preserve">a #GstMessage</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="message_make_writable" c:identifier="gst_message_make_writable" introspectable="0">
<doc xml:space="preserve">Checks if a message is writable. If not, a writable copy is made and
returned.</doc>
<parameters>
<parameter name="msg">
<doc xml:space="preserve">the message to make writable</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="message_new_duration" c:identifier="gst_message_new_duration" introspectable="0">
<parameters>
<parameter name="src">
</parameter>
<parameter name="fmt">
</parameter>
<parameter name="dur">
</parameter>
</parameters>
</function-macro>
<function-macro name="message_parse_duration" c:identifier="gst_message_parse_duration" introspectable="0">
<parameters>
<parameter name="msg">
</parameter>
<parameter name="fmt">
</parameter>
<parameter name="dur">
</parameter>
</parameters>
</function-macro>
<function name="message_replace" c:identifier="gst_message_replace" moved-to="Message.replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstMessage to point to a different #GstMessage. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
message is unreffed, the new one is reffed).
Either @new_message or the #GstMessage pointed to by @old_message may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_message was different from @old_message</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_message" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a
pointer to a #GstMessage to be replaced.</doc>
<type name="Message" c:type="GstMessage**"/>
</parameter>
<parameter name="new_message" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstMessage that will
replace the message pointed to by @old_message.</doc>
<type name="Message" c:type="GstMessage*"/>
</parameter>
</parameters>
</function>
<function name="message_type_get_name" c:identifier="gst_message_type_get_name" moved-to="MessageType.get_name">
<doc xml:space="preserve">Get a printable name for the given message type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the message.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the message type</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</function>
<function name="message_type_to_quark" c:identifier="gst_message_type_to_quark" moved-to="MessageType.to_quark">
<doc xml:space="preserve">Get the unique quark for the given message type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the message type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the message type</doc>
<type name="MessageType" c:type="GstMessageType"/>
</parameter>
</parameters>
</function>
<function name="meta_api_type_get_tags" c:identifier="gst_meta_api_type_get_tags" moved-to="Meta.api_type_get_tags" version="1.2">
<return-value transfer-ownership="none">
<doc xml:space="preserve">an array of tags as strings.</doc>
<array c:type="const gchar* const*">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
</parameters>
</function>
<function name="meta_api_type_has_tag" c:identifier="gst_meta_api_type_has_tag" moved-to="Meta.api_type_has_tag">
<doc xml:space="preserve">Check if @api was registered with @tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @api was registered with @tag.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag to check</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</parameter>
</parameters>
</function>
<function name="meta_api_type_register" c:identifier="gst_meta_api_type_register" moved-to="Meta.api_type_register">
<doc xml:space="preserve">Register and return a GType for the @api and associate it with
@tags.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a unique GType for @api.</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">an API to register</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="tags" transfer-ownership="none">
<doc xml:space="preserve">tags for @api</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</function>
<function name="meta_get_info" c:identifier="gst_meta_get_info" moved-to="Meta.get_info">
<doc xml:space="preserve">Lookup a previously registered meta info structure by its implementation name
@impl.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #GstMetaInfo with @impl, or
%NULL when no such metainfo exists.</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
<parameters>
<parameter name="impl" transfer-ownership="none">
<doc xml:space="preserve">the name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="meta_register" c:identifier="gst_meta_register" moved-to="Meta.register">
<doc xml:space="preserve">Register a new #GstMeta implementation.
The same @info can be retrieved later with gst_meta_get_info() by using
@impl as the key.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">a #GstMetaInfo that can be used to
access metadata.</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
<parameters>
<parameter name="api" transfer-ownership="none">
<doc xml:space="preserve">the type of the #GstMeta API</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="impl" transfer-ownership="none">
<doc xml:space="preserve">the name of the #GstMeta implementation</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of the #GstMeta structure</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="init_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaInitFunction</doc>
<type name="MetaInitFunction" c:type="GstMetaInitFunction"/>
</parameter>
<parameter name="free_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaFreeFunction</doc>
<type name="MetaFreeFunction" c:type="GstMetaFreeFunction"/>
</parameter>
<parameter name="transform_func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GstMetaTransformFunction</doc>
<type name="MetaTransformFunction" c:type="GstMetaTransformFunction"/>
</parameter>
</parameters>
</function>
<function name="mini_object_replace" c:identifier="gst_mini_object_replace" moved-to="MiniObject.replace">
<doc xml:space="preserve">Atomically modifies a pointer to point to a new mini-object.
The reference count of @olddata is decreased and the reference count of
@newdata is increased.
Either @newdata and the value pointed to by @olddata may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newdata was different from @olddata</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to a
mini-object to be replaced</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
<parameter name="newdata" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to new mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</function>
<function name="mini_object_steal" c:identifier="gst_mini_object_steal" moved-to="MiniObject.steal" introspectable="0">
<doc xml:space="preserve">Replace the current #GstMiniObject pointer to by @olddata with %NULL and
return the old value.</doc>
<return-value nullable="1">
<doc xml:space="preserve">the #GstMiniObject at @oldata</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a mini-object to
be stolen</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
</parameters>
</function>
<function name="mini_object_take" c:identifier="gst_mini_object_take" moved-to="MiniObject.take">
<doc xml:space="preserve">Modifies a pointer to point to a new mini-object. The modification
is done atomically. This version is similar to gst_mini_object_replace()
except that it does not increase the refcount of @newdata and thus
takes ownership of @newdata.
Either @newdata and the value pointed to by @olddata may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newdata was different from @olddata</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="olddata" direction="inout" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a pointer to a mini-object to
be replaced</doc>
<type name="MiniObject" c:type="GstMiniObject**"/>
</parameter>
<parameter name="newdata" transfer-ownership="none">
<doc xml:space="preserve">pointer to new mini-object</doc>
<type name="MiniObject" c:type="GstMiniObject*"/>
</parameter>
</parameters>
</function>
<function-macro name="pad_get_caps_reffed" c:identifier="gst_pad_get_caps_reffed" introspectable="0">
<parameters>
<parameter name="p">
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_get_name" c:identifier="gst_pad_get_name" introspectable="0">
<doc xml:space="preserve">Get a copy of the name of the pad. g_free() after usage.
MT safe.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">the pad to get the name from</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_get_parent" c:identifier="gst_pad_get_parent" introspectable="0">
<doc xml:space="preserve">Get the parent of @pad. This function increases the refcount
of the parent object so you should gst_object_unref() it after usage.
Can return %NULL if the pad did not have a parent.
MT safe.</doc>
<parameters>
<parameter name="pad">
<doc xml:space="preserve">the pad to get the parent of</doc>
</parameter>
</parameters>
</function-macro>
<function name="pad_mode_get_name" c:identifier="gst_pad_mode_get_name" moved-to="PadMode.get_name">
<doc xml:space="preserve">Return the name of a pad mode, for use in debug messages mostly.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">short mnemonic for pad mode @mode</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">the pad mode</doc>
<type name="PadMode" c:type="GstPadMode"/>
</parameter>
</parameters>
</function>
<function-macro name="pad_peer_get_caps_reffed" c:identifier="gst_pad_peer_get_caps_reffed" introspectable="0">
<parameters>
<parameter name="p">
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_activate_function" c:identifier="gst_pad_set_activate_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_activate_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadActivateFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_activatemode_function" c:identifier="gst_pad_set_activatemode_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_activatemode_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadActivateModeFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_chain_function" c:identifier="gst_pad_set_chain_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_chain_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a sink #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadChainFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_chain_list_function" c:identifier="gst_pad_set_chain_list_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_chain_list_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a sink #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadChainListFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_event_full_function" c:identifier="gst_pad_set_event_full_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_event_full_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadEventFullFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_event_function" c:identifier="gst_pad_set_event_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_event_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadEventFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_getrange_function" c:identifier="gst_pad_set_getrange_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_getrange_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a source #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadGetRangeFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_iterate_internal_links_function" c:identifier="gst_pad_set_iterate_internal_links_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_iterate_internal_links_function_full() with %NULL
for the user_data and notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadIterIntLinkFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_link_function" c:identifier="gst_pad_set_link_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_link_function_full() with %NULL
for the user_data and notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadLinkFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_query_function" c:identifier="gst_pad_set_query_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_query_function_full() with %NULL for the user_data and
notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad of either direction.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadQueryFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="pad_set_unlink_function" c:identifier="gst_pad_set_unlink_function" introspectable="0">
<doc xml:space="preserve">Calls gst_pad_set_unlink_function_full() with %NULL
for the user_data and notify.</doc>
<parameters>
<parameter name="p">
<doc xml:space="preserve">a #GstPad.</doc>
</parameter>
<parameter name="f">
<doc xml:space="preserve">the #GstPadUnlinkFunction to set.</doc>
</parameter>
</parameters>
</function-macro>
<function name="param_spec_array" c:identifier="gst_param_spec_array" version="1.14">
<doc xml:space="preserve">This function creates a GstArray GParamSpec for use by objects/elements
that want to expose properties of GstArray type. This function is
typically * used in connection with g_object_class_install_property() in a
GObjects's instance_init function.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly created parameter specification</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">canonical name of the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">nick name for the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="blurb" transfer-ownership="none">
<doc xml:space="preserve">description of the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="element_spec" transfer-ownership="none">
<doc xml:space="preserve">GParamSpec of the array</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">flags for the property specified</doc>
<type name="GObject.ParamFlags" c:type="GParamFlags"/>
</parameter>
</parameters>
</function>
<function name="param_spec_fraction" c:identifier="gst_param_spec_fraction">
<doc xml:space="preserve">This function creates a fraction GParamSpec for use by objects/elements
that want to expose properties of fraction type. This function is typically
used in connection with g_object_class_install_property() in a GObjects's
instance_init function.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a newly created parameter specification</doc>
<type name="GObject.ParamSpec" c:type="GParamSpec*"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">canonical name of the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">nick name for the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="blurb" transfer-ownership="none">
<doc xml:space="preserve">description of the property specified</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="min_num" transfer-ownership="none">
<doc xml:space="preserve">minimum value (fraction numerator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="min_denom" transfer-ownership="none">
<doc xml:space="preserve">minimum value (fraction denominator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="max_num" transfer-ownership="none">
<doc xml:space="preserve">maximum value (fraction numerator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="max_denom" transfer-ownership="none">
<doc xml:space="preserve">maximum value (fraction denominator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="default_num" transfer-ownership="none">
<doc xml:space="preserve">default value (fraction numerator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="default_denom" transfer-ownership="none">
<doc xml:space="preserve">default value (fraction denominator)</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">flags for the property specified</doc>
<type name="GObject.ParamFlags" c:type="GParamFlags"/>
</parameter>
</parameters>
</function>
<function name="parent_buffer_meta_api_get_type" c:identifier="gst_parent_buffer_meta_api_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="parent_buffer_meta_get_info" c:identifier="gst_parent_buffer_meta_get_info" moved-to="ParentBufferMeta.get_info" version="1.6">
<doc xml:space="preserve">Get the global #GstMetaInfo describing the #GstParentBufferMeta meta.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
<function name="parse_bin_from_description" c:identifier="gst_parse_bin_from_description" throws="1">
<doc xml:space="preserve">This is a convenience wrapper around gst_parse_launch() to create a
#GstBin from a gst-launch-style pipeline description. See
gst_parse_launch() and the gst-launch man page for details about the
syntax. Ghost pads on the bin for unlinked source or sink pads
within the bin can automatically be created (but only a maximum of
one ghost pad for each direction will be created; if you expect
multiple unlinked source pads or multiple unlinked sink pads
and want them all ghosted, you will have to create the ghost pads
yourself).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a
newly-created bin, or %NULL if an error occurred.</doc>
<type name="Bin" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="bin_description" transfer-ownership="none">
<doc xml:space="preserve">command line describing the bin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="ghost_unlinked_pads" transfer-ownership="none">
<doc xml:space="preserve">whether to automatically create ghost pads
for unlinked source or sink pads within the bin</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="parse_bin_from_description_full" c:identifier="gst_parse_bin_from_description_full" throws="1">
<doc xml:space="preserve">This is a convenience wrapper around gst_parse_launch() to create a
#GstBin from a gst-launch-style pipeline description. See
gst_parse_launch() and the gst-launch man page for details about the
syntax. Ghost pads on the bin for unlinked source or sink pads
within the bin can automatically be created (but only a maximum of
one ghost pad for each direction will be created; if you expect
multiple unlinked source pads or multiple unlinked sink pads
and want them all ghosted, you will have to create the ghost pads
yourself).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a newly-created
element, which is guaranteed to be a bin unless
#GST_PARSE_FLAG_NO_SINGLE_ELEMENT_BINS was passed, or %NULL if an error
occurred.</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="bin_description" transfer-ownership="none">
<doc xml:space="preserve">command line describing the bin</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="ghost_unlinked_pads" transfer-ownership="none">
<doc xml:space="preserve">whether to automatically create ghost pads
for unlinked source or sink pads within the bin</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
<parameter name="context" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a parse context allocated with
gst_parse_context_new(), or %NULL</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">parsing options, or #GST_PARSE_FLAG_NONE</doc>
<type name="ParseFlags" c:type="GstParseFlags"/>
</parameter>
</parameters>
</function>
<function name="parse_error_quark" c:identifier="gst_parse_error_quark" moved-to="ParseError.quark">
<doc xml:space="preserve">Get the error quark used by the parsing subsystem.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark of the parse errors.</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function name="parse_launch" c:identifier="gst_parse_launch" throws="1">
<doc xml:space="preserve">Create a new pipeline based on command line syntax.
Please note that you might get a return value that is not %NULL even though
the @error is set. In this case there was a recoverable parsing error and you
can try to play the pipeline.
To create a sub-pipeline (bin) for embedding into an existing pipeline
use gst_parse_bin_from_description().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new element on success, %NULL on
failure. If more than one toplevel element is specified by the
@pipeline_description, all elements are put into a #GstPipeline, which
than is returned.</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="pipeline_description" transfer-ownership="none">
<doc xml:space="preserve">the command line describing the pipeline</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="parse_launch_full" c:identifier="gst_parse_launch_full" throws="1">
<doc xml:space="preserve">Create a new pipeline based on command line syntax.
Please note that you might get a return value that is not %NULL even though
the @error is set. In this case there was a recoverable parsing error and you
can try to play the pipeline.
To create a sub-pipeline (bin) for embedding into an existing pipeline
use gst_parse_bin_from_description_full().</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new element on success, %NULL on
failure. If more than one toplevel element is specified by the
@pipeline_description, all elements are put into a #GstPipeline, which
then is returned (unless the GST_PARSE_FLAG_PLACE_IN_BIN flag is set, in
which case they are put in a #GstBin instead).</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="pipeline_description" transfer-ownership="none">
<doc xml:space="preserve">the command line describing the pipeline</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="context" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a parse context allocated with
gst_parse_context_new(), or %NULL</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">parsing options, or #GST_PARSE_FLAG_NONE</doc>
<type name="ParseFlags" c:type="GstParseFlags"/>
</parameter>
</parameters>
</function>
<function name="parse_launchv" c:identifier="gst_parse_launchv" throws="1">
<doc xml:space="preserve">Create a new element based on command line syntax.
@error will contain an error message if an erroneous pipeline is specified.
An error does not mean that the pipeline could not be constructed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new element on success and %NULL
on failure.</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="argv" transfer-ownership="none">
<doc xml:space="preserve">null-terminated array of arguments</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</function>
<function name="parse_launchv_full" c:identifier="gst_parse_launchv_full" throws="1">
<doc xml:space="preserve">Create a new element based on command line syntax.
@error will contain an error message if an erroneous pipeline is specified.
An error does not mean that the pipeline could not be constructed.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a new element on success; on
failure, either %NULL or a partially-constructed bin or element will be
returned and @error will be set (unless you passed
#GST_PARSE_FLAG_FATAL_ERRORS in @flags, then %NULL will always be returned
on failure)</doc>
<type name="Element" c:type="GstElement*"/>
</return-value>
<parameters>
<parameter name="argv" transfer-ownership="none">
<doc xml:space="preserve">null-terminated array of arguments</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
<parameter name="context" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">a parse context allocated with
gst_parse_context_new(), or %NULL</doc>
<type name="ParseContext" c:type="GstParseContext*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">parsing options, or #GST_PARSE_FLAG_NONE</doc>
<type name="ParseFlags" c:type="GstParseFlags"/>
</parameter>
</parameters>
</function>
<function name="plugin_error_quark" c:identifier="gst_plugin_error_quark" moved-to="PluginError.quark">
<doc xml:space="preserve">Get the error quark.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The error quark used in GError messages</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function-macro name="plugin_feature_get_name" c:identifier="gst_plugin_feature_get_name" introspectable="0">
<doc xml:space="preserve">Returns the name of @feature.
For a nameless plugin feature, this returns %NULL.</doc>
<parameters>
<parameter name="feature">
<doc xml:space="preserve">a #GstPluginFeature to get the name of @feature.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="plugin_feature_set_name" c:identifier="gst_plugin_feature_set_name" introspectable="0">
<doc xml:space="preserve">Sets the name of the plugin feature, getting rid of the old name if there was one.</doc>
<parameters>
<parameter name="feature">
<doc xml:space="preserve">a #GstPluginFeature to set the name of.</doc>
</parameter>
<parameter name="name">
<doc xml:space="preserve">the new name</doc>
</parameter>
</parameters>
</function-macro>
<function name="poll_new" c:identifier="gst_poll_new" moved-to="Poll.new" introspectable="0">
<doc xml:space="preserve">Create a new file descriptor set. If @controllable, it
is possible to restart or flush a call to gst_poll_wait() with
gst_poll_restart() and gst_poll_set_flushing() respectively.
Free-function: gst_poll_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstPoll, or %NULL in
case of an error. Free with gst_poll_free().</doc>
<type name="Poll" c:type="GstPoll*"/>
</return-value>
<parameters>
<parameter name="controllable" transfer-ownership="none">
<doc xml:space="preserve">whether it should be possible to control a wait.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="poll_new_timer" c:identifier="gst_poll_new_timer" moved-to="Poll.new_timer" introspectable="0">
<doc xml:space="preserve">Create a new poll object that can be used for scheduling cancellable
timeouts.
A timeout is performed with gst_poll_wait(). Multiple timeouts can be
performed from different threads.
Free-function: gst_poll_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">a new #GstPoll, or %NULL in
case of an error. Free with gst_poll_free().</doc>
<type name="Poll" c:type="GstPoll*"/>
</return-value>
</function>
<function name="preset_get_app_dir" c:identifier="gst_preset_get_app_dir" moved-to="Preset.get_app_dir">
<doc xml:space="preserve">Gets the directory for application specific presets if set by the
application.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the directory or %NULL, don't free or modify
the string</doc>
<type name="filename" c:type="const gchar*"/>
</return-value>
</function>
<function name="preset_set_app_dir" c:identifier="gst_preset_set_app_dir" moved-to="Preset.set_app_dir">
<doc xml:space="preserve">Sets an extra directory as an absolute path that should be considered when
looking for presets. Any presets in the application dir will shadow the
system presets.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE for success, %FALSE if the dir already has been set</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="app_dir" transfer-ownership="none">
<doc xml:space="preserve">the application specific preset dir</doc>
<type name="filename" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="print" c:identifier="gst_print" version="1.12" introspectable="0">
<doc xml:space="preserve">Outputs a formatted message via the GLib print handler. The default print
handler simply outputs the message to stdout.
This function will not append a new-line character at the end, unlike
gst_println() which will.
All strings must be in ASCII or UTF-8 encoding.
This function differs from g_print() in that it supports all the additional
printf specifiers that are supported by GStreamer's debug logging system,
such as #GST_PTR_FORMAT and #GST_SEGMENT_FORMAT.
This function is primarily for printing debug output.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the printf arguments for @format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="printerr" c:identifier="gst_printerr" version="1.12" introspectable="0">
<doc xml:space="preserve">Outputs a formatted message via the GLib error message handler. The default
handler simply outputs the message to stderr.
This function will not append a new-line character at the end, unlike
gst_printerrln() which will.
All strings must be in ASCII or UTF-8 encoding.
This function differs from g_printerr() in that it supports the additional
printf specifiers that are supported by GStreamer's debug logging system,
such as #GST_PTR_FORMAT and #GST_SEGMENT_FORMAT.
This function is primarily for printing debug output.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the printf arguments for @format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="printerrln" c:identifier="gst_printerrln" version="1.12" introspectable="0">
<doc xml:space="preserve">Outputs a formatted message via the GLib error message handler. The default
handler simply outputs the message to stderr.
This function will append a new-line character at the end, unlike
gst_printerr() which will not.
All strings must be in ASCII or UTF-8 encoding.
This function differs from g_printerr() in that it supports the additional
printf specifiers that are supported by GStreamer's debug logging system,
such as #GST_PTR_FORMAT and #GST_SEGMENT_FORMAT.
This function is primarily for printing debug output.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the printf arguments for @format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="println" c:identifier="gst_println" version="1.12" introspectable="0">
<doc xml:space="preserve">Outputs a formatted message via the GLib print handler. The default print
handler simply outputs the message to stdout.
This function will append a new-line character at the end, unlike
gst_print() which will not.
All strings must be in ASCII or UTF-8 encoding.
This function differs from g_print() in that it supports all the additional
printf specifiers that are supported by GStreamer's debug logging system,
such as #GST_PTR_FORMAT and #GST_SEGMENT_FORMAT.
This function is primarily for printing debug output.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="format" transfer-ownership="none">
<doc xml:space="preserve">a printf style format string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="..." transfer-ownership="none">
<doc xml:space="preserve">the printf arguments for @format</doc>
<varargs/>
</parameter>
</parameters>
</function>
<function name="protection_filter_systems_by_available_decryptors" c:identifier="gst_protection_filter_systems_by_available_decryptors" version="1.14">
<doc xml:space="preserve">Iterates the supplied list of UUIDs and checks the GstRegistry for
all the decryptors supporting one of the supplied UUIDs.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">
A null terminated array containing all
the @system_identifiers supported by the set of available decryptors, or
%NULL if no matches were found.</doc>
<array c:type="gchar**">
<type name="utf8"/>
</array>
</return-value>
<parameters>
<parameter name="system_identifiers" transfer-ownership="none">
<doc xml:space="preserve">
A null terminated array of strings that contains the UUID values of each
protection system that is to be checked.</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</function>
<function name="protection_meta_api_get_type" c:identifier="gst_protection_meta_api_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="protection_meta_get_info" c:identifier="gst_protection_meta_get_info" moved-to="ProtectionMeta.get_info">
<return-value transfer-ownership="none">
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
<function name="protection_select_system" c:identifier="gst_protection_select_system" version="1.6">
<doc xml:space="preserve">Iterates the supplied list of UUIDs and checks the GstRegistry for
an element that supports one of the supplied UUIDs. If more than one
element matches, the system ID of the highest ranked element is selected.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">One of the strings from
@system_identifiers that indicates the highest ranked element that
implements the protection system indicated by that system ID, or %NULL if no
element has been found.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="system_identifiers" transfer-ownership="none">
<doc xml:space="preserve">A null terminated array of strings
that contains the UUID values of each protection system that is to be
checked.</doc>
<array c:type="const gchar**">
<type name="utf8" c:type="gchar*"/>
</array>
</parameter>
</parameters>
</function>
<function-macro name="query_is_writable" c:identifier="gst_query_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely write data into a query's structure.</doc>
<parameters>
<parameter name="q">
<doc xml:space="preserve">a #GstQuery</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="query_make_writable" c:identifier="gst_query_make_writable" introspectable="0">
<doc xml:space="preserve">Makes a writable query from the given query.</doc>
<parameters>
<parameter name="q">
<doc xml:space="preserve">a #GstQuery to make writable</doc>
</parameter>
</parameters>
</function-macro>
<function name="query_replace" c:identifier="gst_query_replace" moved-to="Query.replace" introspectable="0">
<doc xml:space="preserve">Modifies a pointer to a #GstQuery to point to a different #GstQuery. The
modification is done atomically (so this is useful for ensuring thread safety
in some cases), and the reference counts are updated appropriately (the old
query is unreffed, the new one is reffed).
Either @new_query or the #GstQuery pointed to by @old_query may be %NULL.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @new_query was different from @old_query</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="old_query" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a pointer to a
#GstQuery to be replaced.</doc>
<type name="Query" c:type="GstQuery**"/>
</parameter>
<parameter name="new_query" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a #GstQuery that will
replace the query pointed to by @old_query.</doc>
<type name="Query" c:type="GstQuery*"/>
</parameter>
</parameters>
</function>
<function name="query_type_get_flags" c:identifier="gst_query_type_get_flags" moved-to="QueryType.get_flags">
<doc xml:space="preserve">Gets the #GstQueryTypeFlags associated with @type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a #GstQueryTypeFlags.</doc>
<type name="QueryTypeFlags" c:type="GstQueryTypeFlags"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstQueryType</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
<function name="query_type_get_name" c:identifier="gst_query_type_get_name" moved-to="QueryType.get_name">
<doc xml:space="preserve">Get a printable name for the given query type. Do not modify or free.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a reference to the static name of the query.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the query type</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
<function name="query_type_to_quark" c:identifier="gst_query_type_to_quark" moved-to="QueryType.to_quark">
<doc xml:space="preserve">Get the unique quark for the given query type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the quark associated with the query type</doc>
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the query type</doc>
<type name="QueryType" c:type="GstQueryType"/>
</parameter>
</parameters>
</function>
<function name="reference_timestamp_meta_api_get_type" c:identifier="gst_reference_timestamp_meta_api_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="reference_timestamp_meta_get_info" c:identifier="gst_reference_timestamp_meta_get_info" moved-to="ReferenceTimestampMeta.get_info" version="1.14">
<doc xml:space="preserve">Get the global #GstMetaInfo describing the #GstReferenceTimestampMeta meta.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">The #GstMetaInfo</doc>
<type name="MetaInfo" c:type="const GstMetaInfo*"/>
</return-value>
</function>
<function name="resource_error_quark" c:identifier="gst_resource_error_quark" moved-to="ResourceError.quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function-macro name="sample_is_writable" c:identifier="gst_sample_is_writable" version="1.16" introspectable="0">
<doc xml:space="preserve">Tests if you can safely set the buffer and / or buffer list of @sample.</doc>
<parameters>
<parameter name="sample">
<doc xml:space="preserve">A #GstSample</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="sample_make_writable" c:identifier="gst_sample_make_writable" version="1.16" introspectable="0">
<doc xml:space="preserve">Returns a writable copy of @sample. If the source sample is
already writable, this will simply return the same sample.
Use this function to ensure that a sample can be safely modified before
making changes to it, for example before calling gst_sample_set_buffer()
If the reference count of the source sample @sample is exactly one, the caller
is the sole owner and this function will return the sample object unchanged.
If there is more than one reference on the object, a copy will be made using
gst_sample_copy(). The passed-in @sample will be unreffed in that case, and the
caller will now own a reference to the new returned sample object.
In short, this function unrefs the sample in the argument and refs the sample
that it returns. Don't access the argument after calling this function unless
you have an additional reference to it.</doc>
<parameters>
<parameter name="sample">
<doc xml:space="preserve">A #GstSample</doc>
</parameter>
</parameters>
</function-macro>
<function name="segtrap_is_enabled" c:identifier="gst_segtrap_is_enabled">
<doc xml:space="preserve">Some functions in the GStreamer core might install a custom SIGSEGV handler
to better catch and report errors to the application. Currently this feature
is enabled by default when loading plugins.
Applications might want to disable this behaviour with the
gst_segtrap_set_enabled() function. This is typically done if the application
wants to install its own handler without GStreamer interfering.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if GStreamer is allowed to install a custom SIGSEGV handler.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="segtrap_set_enabled" c:identifier="gst_segtrap_set_enabled">
<doc xml:space="preserve">Applications might want to disable/enable the SIGSEGV handling of
the GStreamer core. See gst_segtrap_is_enabled() for more information.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="enabled" transfer-ownership="none">
<doc xml:space="preserve">whether a custom SIGSEGV handler should be installed.</doc>
<type name="gboolean" c:type="gboolean"/>
</parameter>
</parameters>
</function>
<function name="state_change_get_name" c:identifier="gst_state_change_get_name" moved-to="StateChange.get_name" version="1.14">
<doc xml:space="preserve">Gets a string representing the given state transition.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">a string with the name of the state
result.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="transition" transfer-ownership="none">
<doc xml:space="preserve">a #GstStateChange to get the name of.</doc>
<type name="StateChange" c:type="GstStateChange"/>
</parameter>
</parameters>
</function>
<function name="static_caps_get_type" c:identifier="gst_static_caps_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="static_pad_template_get_type" c:identifier="gst_static_pad_template_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="stream_error_quark" c:identifier="gst_stream_error_quark" moved-to="StreamError.quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function name="stream_type_get_name" c:identifier="gst_stream_type_get_name" moved-to="StreamType.get_name" version="1.10">
<doc xml:space="preserve">Get a descriptive string for a given #GstStreamType</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A string describing the stream type</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="stype" transfer-ownership="none">
<doc xml:space="preserve">a #GstStreamType</doc>
<type name="StreamType" c:type="GstStreamType"/>
</parameter>
</parameters>
</function>
<function name="structure_take" c:identifier="gst_structure_take" moved-to="Structure.take" version="1.18">
<doc xml:space="preserve">Atomically modifies a pointer to point to a new structure.
The #GstStructure @oldstr_ptr is pointing to is freed and
@newstr is taken ownership over.
Either @newstr and the value pointed to by @oldstr_ptr may be %NULL.
It is a programming error if both @newstr and the value pointed to by
@oldstr_ptr refer to the same, non-%NULL structure.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @newstr was different from @oldstr_ptr</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="oldstr_ptr" direction="inout" caller-allocates="0" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">pointer to a place of
a #GstStructure to take</doc>
<type name="Structure" c:type="GstStructure**"/>
</parameter>
<parameter name="newstr" transfer-ownership="full" nullable="1" allow-none="1">
<doc xml:space="preserve">a new #GstStructure</doc>
<type name="Structure" c:type="GstStructure*"/>
</parameter>
</parameters>
</function>
<function name="tag_exists" c:identifier="gst_tag_exists">
<doc xml:space="preserve">Checks if the given type is already registered.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the type is already registered</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">name of the tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_get_description" c:identifier="gst_tag_get_description">
<doc xml:space="preserve">Returns the human-readable description of this tag, You must not change or
free this string.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the human-readable description of this tag</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_get_flag" c:identifier="gst_tag_get_flag">
<doc xml:space="preserve">Gets the flag of @tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the flag of this tag.</doc>
<type name="TagFlag" c:type="GstTagFlag"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_get_nick" c:identifier="gst_tag_get_nick">
<doc xml:space="preserve">Returns the human-readable name of this tag, You must not change or free
this string.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the human-readable name of this tag</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_get_type" c:identifier="gst_tag_get_type">
<doc xml:space="preserve">Gets the #GType used for this tag.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the #GType of this tag</doc>
<type name="GType" c:type="GType"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">the tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_is_fixed" c:identifier="gst_tag_is_fixed">
<doc xml:space="preserve">Checks if the given tag is fixed. A fixed tag can only contain one value.
Unfixed tags can contain lists of values.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if the given tag is fixed.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to check</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="tag_list_copy_value" c:identifier="gst_tag_list_copy_value" moved-to="TagList.copy_value">
<doc xml:space="preserve">Copies the contents for the given tag into the value,
merging multiple values into one if multiple values are associated
with the tag.
You must g_value_unset() the value after use.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE, if a value was copied, %FALSE if the tag didn't exist in the
given list.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">uninitialized #GValue to copy into</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="list" transfer-ownership="none">
<doc xml:space="preserve">list to get the tag from</doc>
<type name="TagList" c:type="const GstTagList*"/>
</parameter>
<parameter name="tag" transfer-ownership="none">
<doc xml:space="preserve">tag to read out</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function-macro name="tag_list_free" c:identifier="gst_tag_list_free" introspectable="0">
<parameters>
<parameter name="taglist">
</parameter>
</parameters>
</function-macro>
<function-macro name="tag_list_is_writable" c:identifier="gst_tag_list_is_writable" introspectable="0">
<doc xml:space="preserve">Tests if you can safely modify @taglist. It is only safe to modify taglist
when there is only one owner of the taglist - ie, the refcount is 1.</doc>
<parameters>
<parameter name="taglist">
<doc xml:space="preserve">a #GstTagList</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="tag_list_make_writable" c:identifier="gst_tag_list_make_writable" introspectable="0">
<doc xml:space="preserve">Returns a writable copy of @taglist.
If there is only one reference count on @taglist, the caller must be the
owner, and so this function will return the taglist object unchanged. If on
the other hand there is more than one reference on the object, a new taglist
object will be returned (which will be a copy of @taglist). The caller's
reference on @taglist will be removed, and instead the caller will own a
reference to the returned object.
In short, this function unrefs the taglist in the argument and refs the
taglist that it returns. Don't access the argument after calling this
function. See also: gst_tag_list_ref().</doc>
<parameters>
<parameter name="taglist">
<doc xml:space="preserve">a #GstTagList</doc>
</parameter>
</parameters>
</function-macro>
<function name="tag_merge_strings_with_comma" c:identifier="gst_tag_merge_strings_with_comma">
<doc xml:space="preserve">This is a convenience function for the func argument of gst_tag_register().
It concatenates all given strings using a comma. The tag must be registered
as a G_TYPE_STRING or this function will fail.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">uninitialized GValue to store result in</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">GValue to copy from</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="tag_merge_use_first" c:identifier="gst_tag_merge_use_first">
<doc xml:space="preserve">This is a convenience function for the func argument of gst_tag_register().
It creates a copy of the first value from the list.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">uninitialized GValue to store result in</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">GValue to copy from</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="tag_register" c:identifier="gst_tag_register" introspectable="0">
<doc xml:space="preserve">Registers a new tag type for the use with GStreamer's type system. If a type
with that name is already registered, that one is used.
The old registration may have used a different type however. So don't rely
on your supplied values.
Important: if you do not supply a merge function the implication will be
that there can only be one single value for this tag in a tag list and
any additional values will silently be discarded when being added (unless
#GST_TAG_MERGE_REPLACE, #GST_TAG_MERGE_REPLACE_ALL, or
#GST_TAG_MERGE_PREPEND is used as merge mode, in which case the new
value will replace the old one in the list).
The merge function will be called from gst_tag_list_copy_value() when
it is required that one or more values for a tag be condensed into
one single value. This may happen from gst_tag_list_get_string(),
gst_tag_list_get_int(), gst_tag_list_get_double() etc. What will happen
exactly in that case depends on how the tag was registered and if a
merge function was supplied and if so which one.
Two default merge functions are provided: gst_tag_merge_use_first() and
gst_tag_merge_strings_with_comma().</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name or identifier string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="flag" transfer-ownership="none">
<doc xml:space="preserve">a flag describing the type of tag info</doc>
<type name="TagFlag" c:type="GstTagFlag"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the type this data is in</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">human-readable name</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="blurb" transfer-ownership="none">
<doc xml:space="preserve">a human-readable description about this tag</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="func" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">function for merging multiple values of this tag, or %NULL</doc>
<type name="TagMergeFunc" c:type="GstTagMergeFunc"/>
</parameter>
</parameters>
</function>
<function name="tag_register_static" c:identifier="gst_tag_register_static" introspectable="0">
<doc xml:space="preserve">Registers a new tag type for the use with GStreamer's type system.
Same as gst_tag_register(), but @name, @nick, and @blurb must be
static strings or inlined strings, as they will not be copied. (GStreamer
plugins will be made resident once loaded, so this function can be used
even from dynamically loaded plugins.)</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name or identifier string (string constant)</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="flag" transfer-ownership="none">
<doc xml:space="preserve">a flag describing the type of tag info</doc>
<type name="TagFlag" c:type="GstTagFlag"/>
</parameter>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">the type this data is in</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="nick" transfer-ownership="none">
<doc xml:space="preserve">human-readable name or short description (string constant)</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="blurb" transfer-ownership="none">
<doc xml:space="preserve">a human-readable description for this tag (string constant)</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="func" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">function for merging multiple values of this tag, or %NULL</doc>
<type name="TagMergeFunc" c:type="GstTagMergeFunc"/>
</parameter>
</parameters>
</function>
<function-macro name="toc_copy" c:identifier="gst_toc_copy" introspectable="0">
<doc xml:space="preserve">Copy #GstToc with all subentries (deep copy).</doc>
<parameters>
<parameter name="toc">
<doc xml:space="preserve">#GstToc to copy.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_entry_copy" c:identifier="gst_toc_entry_copy" introspectable="0">
<doc xml:space="preserve">Copy #GstTocEntry with all subentries (deep copy).</doc>
<parameters>
<parameter name="entry">
<doc xml:space="preserve">#GstTocEntry to copy.</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_entry_make_writable" c:identifier="gst_toc_entry_make_writable" introspectable="0">
<parameters>
<parameter name="entry">
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_entry_ref" c:identifier="gst_toc_entry_ref" introspectable="0">
<parameters>
<parameter name="entry">
</parameter>
</parameters>
</function-macro>
<function name="toc_entry_type_get_nick" c:identifier="gst_toc_entry_type_get_nick" moved-to="TocEntryType.get_nick">
<doc xml:space="preserve">Converts @type to a string representation.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Returns a human-readable string for @type. This string is
only for debugging purpose and should not be displayed in a user
interface.</doc>
<type name="utf8" c:type="const gchar*"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a #GstTocEntryType.</doc>
<type name="TocEntryType" c:type="GstTocEntryType"/>
</parameter>
</parameters>
</function>
<function-macro name="toc_entry_unref" c:identifier="gst_toc_entry_unref" introspectable="0">
<parameters>
<parameter name="entry">
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_make_writable" c:identifier="gst_toc_make_writable" introspectable="0">
<parameters>
<parameter name="toc">
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_ref" c:identifier="gst_toc_ref" introspectable="0">
<parameters>
<parameter name="toc">
</parameter>
</parameters>
</function-macro>
<function-macro name="toc_unref" c:identifier="gst_toc_unref" introspectable="0">
<parameters>
<parameter name="toc">
</parameter>
</parameters>
</function-macro>
<function name="tracing_get_active_tracers" c:identifier="gst_tracing_get_active_tracers" version="1.18">
<doc xml:space="preserve">Get a list of all active tracer objects owned by the tracing framework for
the entirety of the run-time of the process or till gst_deinit() is called.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A #GList of
#GstTracer objects</doc>
<type name="GLib.List" c:type="GList*">
<type name="Tracer"/>
</type>
</return-value>
</function>
<function name="tracing_register_hook" c:identifier="gst_tracing_register_hook" version="1.8">
<doc xml:space="preserve">Register @func to be called when the trace hook @detail is getting invoked.
Use %NULL for @detail to register to all hooks.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="tracer" transfer-ownership="none">
<doc xml:space="preserve">the tracer</doc>
<type name="Tracer" c:type="GstTracer*"/>
</parameter>
<parameter name="detail" transfer-ownership="none">
<doc xml:space="preserve">the detailed hook</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="async">
<doc xml:space="preserve">the callback</doc>
<type name="GObject.Callback" c:type="GCallback"/>
</parameter>
</parameters>
</function>
<function name="type_find_get_type" c:identifier="gst_type_find_get_type">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GType" c:type="GType"/>
</return-value>
</function>
<function name="type_find_register" c:identifier="gst_type_find_register" moved-to="TypeFind.register">
<doc xml:space="preserve">Registers a new typefind function to be used for typefinding. After
registering this function will be available for typefinding.
This function is typically called during an element's plugin initialization.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success, %FALSE otherwise</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="plugin" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">A #GstPlugin, or %NULL for a static typefind function</doc>
<type name="Plugin" c:type="GstPlugin*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">The name for registering</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="rank" transfer-ownership="none">
<doc xml:space="preserve">The rank (or importance) of this typefind function</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="func" transfer-ownership="none" scope="notified" closure="6" destroy="7">
<doc xml:space="preserve">The #GstTypeFindFunction to use</doc>
<type name="TypeFindFunction" c:type="GstTypeFindFunction"/>
</parameter>
<parameter name="extensions" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optional comma-separated list of extensions
that could belong to this type</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="possible_caps" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optionally the caps that could be returned when typefinding
succeeds</doc>
<type name="Caps" c:type="GstCaps*"/>
</parameter>
<parameter name="data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">Optional user data. This user data must be available until the plugin
is unloaded.</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="data_notify" transfer-ownership="none" scope="async">
<doc xml:space="preserve">a #GDestroyNotify that will be called on @data when the plugin
is unloaded.</doc>
<type name="GLib.DestroyNotify" c:type="GDestroyNotify"/>
</parameter>
</parameters>
</function>
<function name="type_is_plugin_api" c:identifier="gst_type_is_plugin_api" version="1.18">
<doc xml:space="preserve">Checks if @type is plugin API. See gst_type_mark_as_plugin_api() for
details.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @type is plugin API or %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a GType</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="flags" direction="out" caller-allocates="0" transfer-ownership="full" nullable="1">
<doc xml:space="preserve">What #GstPluginAPIFlags the plugin was marked with</doc>
<type name="PluginAPIFlags" c:type="GstPluginAPIFlags*"/>
</parameter>
</parameters>
</function>
<function name="type_mark_as_plugin_api" c:identifier="gst_type_mark_as_plugin_api" version="1.18">
<doc xml:space="preserve">Marks @type as plugin API. This should be called in `class_init` of
elements that expose new types (i.e. enums, flags or internal GObjects) via
properties, signals or pad templates.
Types exposed by plugins are not automatically added to the documentation
as they might originate from another library and should in that case be
documented via that library instead.
By marking a type as plugin API it will be included in the documentation of
the plugin that defines it.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">a GType</doc>
<type name="GType" c:type="GType"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">a set of #GstPluginAPIFlags to further inform cache generation.</doc>
<type name="PluginAPIFlags" c:type="GstPluginAPIFlags"/>
</parameter>
</parameters>
</function>
<function name="update_registry" c:identifier="gst_update_registry">
<doc xml:space="preserve">Forces GStreamer to re-scan its plugin paths and update the default
plugin registry.
Applications will almost never need to call this function, it is only
useful if the application knows new plugins have been installed (or old
ones removed) since the start of the application (or, to be precise, the
first call to gst_init()) and the application wants to make use of any
newly-installed plugins without restarting the application.
Applications should assume that the registry update is neither atomic nor
thread-safe and should therefore not have any dynamic pipelines running
(including the playbin and decodebin elements) and should also not create
any elements or access the GStreamer registry while the update is in
progress.
Note that this function may block for a significant amount of time.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the registry has been updated successfully (does not
imply that there were changes), otherwise %FALSE.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
</function>
<function name="uri_construct" c:identifier="gst_uri_construct" moved-to="Uri.construct" deprecated="1">
<doc xml:space="preserve">Constructs a URI for a given valid protocol and location.
Free-function: g_free</doc>
<doc-deprecated xml:space="preserve">Use GstURI instead.</doc-deprecated>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a new string for this URI. Returns %NULL if the
given URI protocol is not valid, or the given location is %NULL.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">Protocol for URI</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="location" transfer-ownership="none">
<doc xml:space="preserve">Location for URI</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_error_quark" c:identifier="gst_uri_error_quark" moved-to="URIError.quark">
<attribute name="doc.skip" value="true"/>
<return-value transfer-ownership="none">
<type name="GLib.Quark" c:type="GQuark"/>
</return-value>
</function>
<function name="uri_from_string" c:identifier="gst_uri_from_string" moved-to="Uri.from_string" version="1.6">
<doc xml:space="preserve">Parses a URI string into a new #GstUri object. Will return NULL if the URI
cannot be parsed.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A new #GstUri object, or NULL.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The URI string to parse.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_from_string_escaped" c:identifier="gst_uri_from_string_escaped" moved-to="Uri.from_string_escaped" version="1.18">
<doc xml:space="preserve">Parses a URI string into a new #GstUri object. Will return NULL if the URI
cannot be parsed. This is identical to gst_uri_from_string() except that
the userinfo and fragment components of the URI will not be unescaped while
parsing.
Use this when you need to extract a username and password from the userinfo
such as https://user:password@example.com since either may contain
a URI-escaped ':' character. gst_uri_from_string() will unescape the entire
userinfo component, which will make it impossible to know which ':'
delineates the username and password.
The same applies to the fragment component of the URI, such as
https://example.com/path#fragment which may contain a URI-escaped '#'.</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">A new #GstUri object, or NULL.</doc>
<type name="Uri" c:type="GstUri*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">The URI string to parse.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_get_location" c:identifier="gst_uri_get_location" moved-to="Uri.get_location">
<doc xml:space="preserve">Extracts the location out of a given valid URI, ie. the protocol and "://"
are stripped from the URI, which means that the location returned includes
the hostname if one is specified. The returned string must be freed using
g_free().
Free-function: g_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the location for this URI. Returns
%NULL if the URI isn't valid. If the URI does not contain a location, an
empty string is returned.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_get_protocol" c:identifier="gst_uri_get_protocol" moved-to="Uri.get_protocol">
<doc xml:space="preserve">Extracts the protocol out of a given valid URI. The returned string must be
freed using g_free().</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">The protocol for this URI.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_has_protocol" c:identifier="gst_uri_has_protocol" moved-to="Uri.has_protocol">
<doc xml:space="preserve">Checks if the protocol of a given valid URI matches @protocol.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the protocol matches.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">a URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">a protocol string (e.g. "http")</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_is_valid" c:identifier="gst_uri_is_valid" moved-to="Uri.is_valid">
<doc xml:space="preserve">Tests if the given string is a valid URI identifier. URIs start with a valid
scheme followed by ":" and maybe a string identifying the location.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the string is a valid URI</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="uri" transfer-ownership="none">
<doc xml:space="preserve">A URI string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_join_strings" c:identifier="gst_uri_join_strings" moved-to="Uri.join_strings" version="1.6">
<doc xml:space="preserve">This is a convenience function to join two URI strings and return the result.
The returned string should be g_free()'d after use.</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">A string representing the percent-encoded join of
the two URIs.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="base_uri" transfer-ownership="none">
<doc xml:space="preserve">The percent-encoded base URI.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="ref_uri" transfer-ownership="none">
<doc xml:space="preserve">The percent-encoded reference URI to join to the @base_uri.</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_protocol_is_supported" c:identifier="gst_uri_protocol_is_supported" moved-to="Uri.protocol_is_supported">
<doc xml:space="preserve">Checks if an element exists that supports the given URI protocol. Note
that a positive return value does not imply that a subsequent call to
gst_element_make_from_uri() is guaranteed to work.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="type" transfer-ownership="none">
<doc xml:space="preserve">Whether to check for a source or a sink</doc>
<type name="URIType" c:type="const GstURIType"/>
</parameter>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">Protocol that should be checked for (e.g. "http" or "smb")</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="uri_protocol_is_valid" c:identifier="gst_uri_protocol_is_valid" moved-to="Uri.protocol_is_valid">
<doc xml:space="preserve">Tests if the given string is a valid protocol identifier. Protocols
must consist of alphanumeric characters, '+', '-' and '.' and must
start with a alphabetic character. See RFC 3986 Section 3.1.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the string is a valid protocol identifier, %FALSE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="protocol" transfer-ownership="none">
<doc xml:space="preserve">A string</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="util_array_binary_search" c:identifier="gst_util_array_binary_search">
<doc xml:space="preserve">Searches inside @array for @search_data by using the comparison function
@search_func. @array must be sorted ascending.
As @search_data is always passed as second argument to @search_func it's
not required that @search_data has the same type as the array elements.
The complexity of this search function is O(log (num_elements)).</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">The address of the found
element or %NULL if nothing was found</doc>
<type name="gpointer" c:type="gpointer"/>
</return-value>
<parameters>
<parameter name="array" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">the sorted input array</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
<parameter name="num_elements" transfer-ownership="none">
<doc xml:space="preserve">number of elements in the array</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="element_size" transfer-ownership="none">
<doc xml:space="preserve">size of every element in bytes</doc>
<type name="gsize" c:type="gsize"/>
</parameter>
<parameter name="search_func" transfer-ownership="none" scope="call" closure="6">
<doc xml:space="preserve">function to compare two elements, @search_data will always be passed as second argument</doc>
<type name="GLib.CompareDataFunc" c:type="GCompareDataFunc"/>
</parameter>
<parameter name="mode" transfer-ownership="none">
<doc xml:space="preserve">search mode that should be used</doc>
<type name="SearchMode" c:type="GstSearchMode"/>
</parameter>
<parameter name="search_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">element that should be found</doc>
<type name="gpointer" c:type="gconstpointer"/>
</parameter>
<parameter name="user_data" transfer-ownership="none" nullable="1" allow-none="1">
<doc xml:space="preserve">data to pass to @search_func</doc>
<type name="gpointer" c:type="gpointer"/>
</parameter>
</parameters>
</function>
<function name="util_double_to_fraction" c:identifier="gst_util_double_to_fraction">
<doc xml:space="preserve">Transforms a #gdouble to a fraction and simplifies
the result.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">#gdouble to transform</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="dest_n" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a #gint to hold the result numerator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="dest_d" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a #gint to hold the result denominator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</function>
<function name="util_dump_buffer" c:identifier="gst_util_dump_buffer" version="1.14">
<doc xml:space="preserve">Dumps the buffer memory into a hex representation. Useful for debugging.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="buf" transfer-ownership="none">
<doc xml:space="preserve">a #GstBuffer whose memory to dump</doc>
<type name="Buffer" c:type="GstBuffer*"/>
</parameter>
</parameters>
</function>
<function name="util_dump_mem" c:identifier="gst_util_dump_mem">
<doc xml:space="preserve">Dumps the memory block into a hex representation. Useful for debugging.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="mem" transfer-ownership="none">
<doc xml:space="preserve">a pointer to the memory to dump</doc>
<array length="1" zero-terminated="0" c:type="const guchar*">
<type name="guint8" c:type="guchar"/>
</array>
</parameter>
<parameter name="size" transfer-ownership="none">
<doc xml:space="preserve">the size of the memory block to dump</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="util_fraction_add" c:identifier="gst_util_fraction_add">
<doc xml:space="preserve">Adds the fractions @a_n/@a_d and @b_n/@b_d and stores
the result in @res_n and @res_d.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE on overflow, %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="a_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="a_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="res_n" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Pointer to #gint to hold the result numerator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="res_d" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Pointer to #gint to hold the result denominator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</function>
<function name="util_fraction_compare" c:identifier="gst_util_fraction_compare">
<doc xml:space="preserve">Compares the fractions @a_n/@a_d and @b_n/@b_d and returns
-1 if a &lt; b, 0 if a = b and 1 if a &gt; b.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">-1 if a &lt; b; 0 if a = b; 1 if a &gt; b.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="a_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="a_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="util_fraction_multiply" c:identifier="gst_util_fraction_multiply">
<doc xml:space="preserve">Multiplies the fractions @a_n/@a_d and @b_n/@b_d and stores
the result in @res_n and @res_d.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE on overflow, %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="a_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="a_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of first value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_n" transfer-ownership="none">
<doc xml:space="preserve">Numerator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b_d" transfer-ownership="none">
<doc xml:space="preserve">Denominator of second value</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="res_n" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Pointer to #gint to hold the result numerator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
<parameter name="res_d" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">Pointer to #gint to hold the result denominator</doc>
<type name="gint" c:type="gint*"/>
</parameter>
</parameters>
</function>
<function name="util_fraction_to_double" c:identifier="gst_util_fraction_to_double">
<doc xml:space="preserve">Transforms a fraction to a #gdouble.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="src_n" transfer-ownership="none">
<doc xml:space="preserve">Fraction numerator as #gint</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="src_d" transfer-ownership="none">
<doc xml:space="preserve">Fraction denominator #gint</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="dest" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a #gdouble for the result</doc>
<type name="gdouble" c:type="gdouble*"/>
</parameter>
</parameters>
</function>
<function name="util_gdouble_to_guint64" c:identifier="gst_util_gdouble_to_guint64">
<return-value transfer-ownership="none">
<doc xml:space="preserve">@value casted to #guint64</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">The #gdouble value to convert guint64 double</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
</parameters>
</function>
<function name="util_get_object_array" c:identifier="gst_util_get_object_array" version="1.12">
<doc xml:space="preserve">Get a property of type %GST_TYPE_ARRAY and transform it into a
#GValueArray. This allow language bindings to get GST_TYPE_ARRAY
properties which are otherwise not an accessible type.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object to set the array to</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the property to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">a return #GValueArray</doc>
<type name="GObject.ValueArray" c:type="GValueArray**"/>
</parameter>
</parameters>
</function>
<function name="util_get_timestamp" c:identifier="gst_util_get_timestamp">
<doc xml:space="preserve">Get a timestamp as GstClockTime to be used for interval measurements.
The timestamp should not be interpreted in any other way.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the timestamp</doc>
<type name="ClockTime" c:type="GstClockTime"/>
</return-value>
</function>
<function name="util_greatest_common_divisor" c:identifier="gst_util_greatest_common_divisor">
<doc xml:space="preserve">Calculates the greatest common divisor of @a
and @b.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Greatest common divisor of @a and @b</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="a" transfer-ownership="none">
<doc xml:space="preserve">First value as #gint</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="b" transfer-ownership="none">
<doc xml:space="preserve">Second value as #gint</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="util_greatest_common_divisor_int64" c:identifier="gst_util_greatest_common_divisor_int64">
<doc xml:space="preserve">Calculates the greatest common divisor of @a
and @b.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">Greatest common divisor of @a and @b</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<parameter name="a" transfer-ownership="none">
<doc xml:space="preserve">First value as #gint64</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="b" transfer-ownership="none">
<doc xml:space="preserve">Second value as #gint64</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</function>
<function name="util_group_id_next" c:identifier="gst_util_group_id_next">
<doc xml:space="preserve">Return a constantly incrementing group id.
This function is used to generate a new group-id for the
stream-start event.
This function never returns %GST_GROUP_ID_INVALID (which is 0)</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A constantly incrementing unsigned integer, which might
overflow back to 0 at some point.</doc>
<type name="guint" c:type="guint"/>
</return-value>
</function>
<function name="util_guint64_to_gdouble" c:identifier="gst_util_guint64_to_gdouble">
<return-value transfer-ownership="none">
<doc xml:space="preserve">@value casted to #gdouble</doc>
<type name="gdouble" c:type="gdouble"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">The #guint64 value to convert to double</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</function>
<function name="util_seqnum_compare" c:identifier="gst_util_seqnum_compare">
<doc xml:space="preserve">Compare two sequence numbers, handling wraparound.
The current implementation just returns (gint32)(@s1 - @s2).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A negative number if @s1 is before @s2, 0 if they are equal, or a
positive number if @s1 is after @s2.</doc>
<type name="gint32" c:type="gint32"/>
</return-value>
<parameters>
<parameter name="s1" transfer-ownership="none">
<doc xml:space="preserve">A sequence number.</doc>
<type name="guint32" c:type="guint32"/>
</parameter>
<parameter name="s2" transfer-ownership="none">
<doc xml:space="preserve">Another sequence number.</doc>
<type name="guint32" c:type="guint32"/>
</parameter>
</parameters>
</function>
<function name="util_seqnum_next" c:identifier="gst_util_seqnum_next">
<doc xml:space="preserve">Return a constantly incrementing sequence number.
This function is used internally to GStreamer to be able to determine which
events and messages are "the same". For example, elements may set the seqnum
on a segment-done message to be the same as that of the last seek event, to
indicate that event and the message correspond to the same segment.
This function never returns %GST_SEQNUM_INVALID (which is 0).</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">A constantly incrementing 32-bit unsigned integer, which might
overflow at some point. Use gst_util_seqnum_compare() to make sure
you handle wraparound correctly.</doc>
<type name="guint32" c:type="guint32"/>
</return-value>
</function>
<function name="util_set_object_arg" c:identifier="gst_util_set_object_arg">
<doc xml:space="preserve">Converts the string value to the type of the objects argument and
sets the argument with it.
Note that this function silently returns if @object has no property named
@name or when @value cannot be converted to the type of the property.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object to set the argument of</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the argument to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the string value to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="util_set_object_array" c:identifier="gst_util_set_object_array" version="1.12">
<doc xml:space="preserve">Transfer a #GValueArray to %GST_TYPE_ARRAY and set this value on the
specified property name. This allow language bindings to set GST_TYPE_ARRAY
properties which are otherwise not an accessible type.</doc>
<return-value transfer-ownership="none">
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="object" transfer-ownership="none">
<doc xml:space="preserve">the object to set the array to</doc>
<type name="GObject.Object" c:type="GObject*"/>
</parameter>
<parameter name="name" transfer-ownership="none">
<doc xml:space="preserve">the name of the property to set</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
<parameter name="array" transfer-ownership="none">
<doc xml:space="preserve">a #GValueArray containing the values</doc>
<type name="GObject.ValueArray" c:type="const GValueArray*"/>
</parameter>
</parameters>
</function>
<function name="util_set_value_from_string" c:identifier="gst_util_set_value_from_string">
<doc xml:space="preserve">Converts the string to the type of the value and
sets the value with it.
Note that this function is dangerous as it does not return any indication
if the conversion worked or not.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">the value to set</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="value_str" transfer-ownership="none">
<doc xml:space="preserve">the string to get the value from</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale" c:identifier="gst_util_uint64_scale">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision.
This function can potentially be very slow if val and num are both
greater than G_MAXUINT32.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer it is truncated. See also
gst_util_uint64_scale_round(), gst_util_uint64_scale_ceil(),
gst_util_uint64_scale_int(), gst_util_uint64_scale_int_round(),
gst_util_uint64_scale_int_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">the number to scale</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale_ceil" c:identifier="gst_util_uint64_scale_ceil">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision.
This function can potentially be very slow if val and num are both
greater than G_MAXUINT32.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer, it is rounded up. See also
gst_util_uint64_scale(), gst_util_uint64_scale_round(),
gst_util_uint64_scale_int(), gst_util_uint64_scale_int_round(),
gst_util_uint64_scale_int_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">the number to scale</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale_int" c:identifier="gst_util_uint64_scale_int">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision. @num must be non-negative and
@denom must be positive.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer, it is truncated. See also
gst_util_uint64_scale_int_round(), gst_util_uint64_scale_int_ceil(),
gst_util_uint64_scale(), gst_util_uint64_scale_round(),
gst_util_uint64_scale_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">guint64 (such as a #GstClockTime) to scale.</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">numerator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">denominator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale_int_ceil" c:identifier="gst_util_uint64_scale_int_ceil">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision. @num must be non-negative and
@denom must be positive.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer, it is rounded up. See also
gst_util_uint64_scale_int(), gst_util_uint64_scale_int_round(),
gst_util_uint64_scale(), gst_util_uint64_scale_round(),
gst_util_uint64_scale_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">guint64 (such as a #GstClockTime) to scale.</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">numerator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">denominator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale_int_round" c:identifier="gst_util_uint64_scale_int_round">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision. @num must be non-negative and
@denom must be positive.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer, it is rounded to the nearest integer
(half-way cases are rounded up). See also gst_util_uint64_scale_int(),
gst_util_uint64_scale_int_ceil(), gst_util_uint64_scale(),
gst_util_uint64_scale_round(), gst_util_uint64_scale_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">guint64 (such as a #GstClockTime) to scale.</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">numerator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">denominator of the scale factor.</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="util_uint64_scale_round" c:identifier="gst_util_uint64_scale_round">
<doc xml:space="preserve">Scale @val by the rational number @num / @denom, avoiding overflows and
underflows and without loss of precision.
This function can potentially be very slow if val and num are both
greater than G_MAXUINT32.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">@val * @num / @denom. In the case of an overflow, this
function returns G_MAXUINT64. If the result is not exactly
representable as an integer, it is rounded to the nearest integer
(half-way cases are rounded up). See also gst_util_uint64_scale(),
gst_util_uint64_scale_ceil(), gst_util_uint64_scale_int(),
gst_util_uint64_scale_int_round(), gst_util_uint64_scale_int_ceil().</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="val" transfer-ownership="none">
<doc xml:space="preserve">the number to scale</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="num" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
<parameter name="denom" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the scale ratio</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</function>
<function name="value_can_compare" c:identifier="gst_value_can_compare">
<doc xml:space="preserve">Determines if @value1 and @value2 can be compared.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the values can be compared</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to compare</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to compare</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_can_intersect" c:identifier="gst_value_can_intersect">
<doc xml:space="preserve">Determines if intersecting two values will produce a valid result.
Two values will produce a valid intersection if they have the same
type.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the values can intersect</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to intersect</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to intersect</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_can_subtract" c:identifier="gst_value_can_subtract">
<doc xml:space="preserve">Checks if it's possible to subtract @subtrahend from @minuend.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if a subtraction is possible</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="minuend" transfer-ownership="none">
<doc xml:space="preserve">the value to subtract from</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="subtrahend" transfer-ownership="none">
<doc xml:space="preserve">the value to subtract</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_can_union" c:identifier="gst_value_can_union">
<doc xml:space="preserve">Determines if @value1 and @value2 can be non-trivially unioned.
Any two values can be trivially unioned by adding both of them
to a GstValueList. However, certain types have the possibility
to be unioned in a simpler way. For example, an integer range
and an integer can be unioned if the integer is a subset of the
integer range. If there is the possibility that two values can
be unioned, this function returns %TRUE.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if there is a function allowing the two values to
be unioned.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to union</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to union</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_compare" c:identifier="gst_value_compare">
<doc xml:space="preserve">Compares @value1 and @value2. If @value1 and @value2 cannot be
compared, the function returns GST_VALUE_UNORDERED. Otherwise,
if @value1 is greater than @value2, GST_VALUE_GREATER_THAN is returned.
If @value1 is less than @value2, GST_VALUE_LESS_THAN is returned.
If the values are equal, GST_VALUE_EQUAL is returned.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">comparison result</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to compare</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to compare</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_deserialize" c:identifier="gst_value_deserialize">
<doc xml:space="preserve">Tries to deserialize a string into the type specified by the given GValue.
If the operation succeeds, %TRUE is returned, %FALSE otherwise.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE on success</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">#GValue to fill with contents of
deserialization</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">string to deserialize</doc>
<type name="utf8" c:type="const gchar*"/>
</parameter>
</parameters>
</function>
<function name="value_fixate" c:identifier="gst_value_fixate">
<doc xml:space="preserve">Fixate @src into a new value @dest.
For ranges, the first element is taken. For lists and arrays, the
first item is fixated and returned.
If @src is already fixed, this function returns %FALSE.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if @dest contains a fixated version of @src.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">the #GValue destination</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the #GValue to fixate</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_fraction_multiply" c:identifier="gst_value_fraction_multiply">
<doc xml:space="preserve">Multiplies the two #GValue items containing a #GST_TYPE_FRACTION and sets
@product to the product of the two fractions.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE in case of an error (like integer overflow), %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="product" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="factor1" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="factor2" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_fraction_subtract" c:identifier="gst_value_fraction_subtract">
<doc xml:space="preserve">Subtracts the @subtrahend from the @minuend and sets @dest to the result.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%FALSE in case of an error (like integer overflow), %TRUE otherwise.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="minuend" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="subtrahend" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_bitmask" c:identifier="gst_value_get_bitmask">
<doc xml:space="preserve">Gets the bitmask specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the bitmask.</doc>
<type name="guint64" c:type="guint64"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_BITMASK</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function-macro name="value_get_buffer" c:identifier="gst_value_get_buffer" introspectable="0">
<doc xml:space="preserve">Receives a #GstBuffer as the value of @v. Does not return a reference to
the buffer, so the pointer is only valid for as long as the caller owns
a reference to @v.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to query</doc>
</parameter>
</parameters>
</function-macro>
<function name="value_get_caps" c:identifier="gst_value_get_caps">
<doc xml:space="preserve">Gets the contents of @value. The reference count of the returned
#GstCaps will not be modified, therefore the caller must take one
before getting rid of the @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the contents of @value</doc>
<type name="Caps" c:type="const GstCaps*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_CAPS</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_caps_features" c:identifier="gst_value_get_caps_features">
<doc xml:space="preserve">Gets the contents of @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the contents of @value</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_CAPS_FEATURES</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_double_range_max" c:identifier="gst_value_get_double_range_max">
<doc xml:space="preserve">Gets the maximum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the maximum of the range</doc>
<type name="gdouble" c:type="gdouble"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_DOUBLE_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_double_range_min" c:identifier="gst_value_get_double_range_min">
<doc xml:space="preserve">Gets the minimum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the minimum of the range</doc>
<type name="gdouble" c:type="gdouble"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_DOUBLE_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_flagset_flags" c:identifier="gst_value_get_flagset_flags" version="1.6">
<doc xml:space="preserve">Retrieve the flags field of a GstFlagSet @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the flags field of the flagset instance.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FLAG_SET</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_flagset_mask" c:identifier="gst_value_get_flagset_mask" version="1.6">
<doc xml:space="preserve">Retrieve the mask field of a GstFlagSet @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the mask field of the flagset instance.</doc>
<type name="guint" c:type="guint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FLAG_SET</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_fraction_denominator" c:identifier="gst_value_get_fraction_denominator">
<doc xml:space="preserve">Gets the denominator of the fraction specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the denominator of the fraction.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_fraction_numerator" c:identifier="gst_value_get_fraction_numerator">
<doc xml:space="preserve">Gets the numerator of the fraction specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the numerator of the fraction.</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_fraction_range_max" c:identifier="gst_value_get_fraction_range_max">
<doc xml:space="preserve">Gets the maximum of the range specified by @value.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the maximum of the range</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_FRACTION_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_fraction_range_min" c:identifier="gst_value_get_fraction_range_min">
<doc xml:space="preserve">Gets the minimum of the range specified by @value.</doc>
<return-value transfer-ownership="none" nullable="1">
<doc xml:space="preserve">the minimum of the range</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_FRACTION_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int64_range_max" c:identifier="gst_value_get_int64_range_max">
<doc xml:space="preserve">Gets the maximum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the maximum of the range</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT64_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int64_range_min" c:identifier="gst_value_get_int64_range_min">
<doc xml:space="preserve">Gets the minimum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the minimum of the range</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT64_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int64_range_step" c:identifier="gst_value_get_int64_range_step">
<doc xml:space="preserve">Gets the step of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the step of the range</doc>
<type name="gint64" c:type="gint64"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT64_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int_range_max" c:identifier="gst_value_get_int_range_max">
<doc xml:space="preserve">Gets the maximum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the maximum of the range</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int_range_min" c:identifier="gst_value_get_int_range_min">
<doc xml:space="preserve">Gets the minimum of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the minimum of the range</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_get_int_range_step" c:identifier="gst_value_get_int_range_step">
<doc xml:space="preserve">Gets the step of the range specified by @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the step of the range</doc>
<type name="gint" c:type="gint"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT_RANGE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function-macro name="value_get_sample" c:identifier="gst_value_get_sample" introspectable="0">
<doc xml:space="preserve">Receives a #GstSample as the value of @v. Does not return a reference to
the sample, so the pointer is only valid for as long as the caller owns
a reference to @v.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to query</doc>
</parameter>
</parameters>
</function-macro>
<function name="value_get_structure" c:identifier="gst_value_get_structure">
<doc xml:space="preserve">Gets the contents of @value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">the contents of @value</doc>
<type name="Structure" c:type="const GstStructure*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_STRUCTURE</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_init_and_copy" c:identifier="gst_value_init_and_copy">
<doc xml:space="preserve">Initialises the target value to be of the same type as source and then copies
the contents from source to target.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">the target value</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="src" transfer-ownership="none">
<doc xml:space="preserve">the source value</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_intersect" c:identifier="gst_value_intersect">
<doc xml:space="preserve">Calculates the intersection of two values. If the values have
a non-empty intersection, the value representing the intersection
is placed in @dest, unless %NULL. If the intersection is non-empty,
@dest is not modified.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the intersection is non-empty</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="full" optional="1" allow-none="1">
<doc xml:space="preserve">
a uninitialized #GValue that will hold the calculated
intersection value. May be %NULL if the resulting set if not
needed.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to intersect</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to intersect</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_is_fixed" c:identifier="gst_value_is_fixed">
<doc xml:space="preserve">Tests if the given GValue, if available in a GstStructure (or any other
container) contains a "fixed" (which means: one value) or an "unfixed"
(which means: multiple possible values, such as data lists or data
ranges) value.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">true if the value is "fixed".</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">the #GValue to check</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_is_subset" c:identifier="gst_value_is_subset">
<doc xml:space="preserve">Check that @value1 is a subset of @value2.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE is @value1 is a subset of @value2</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">a #GValue</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_register" c:identifier="gst_value_register">
<doc xml:space="preserve">Registers functions to perform calculations on #GValue items of a given
type. Each type can only be added once.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="table" transfer-ownership="none">
<doc xml:space="preserve">structure containing functions to register</doc>
<type name="ValueTable" c:type="const GstValueTable*"/>
</parameter>
</parameters>
</function>
<function name="value_serialize" c:identifier="gst_value_serialize">
<doc xml:space="preserve">tries to transform the given @value into a string representation that allows
getting back this string later on using gst_value_deserialize().
Free-function: g_free</doc>
<return-value transfer-ownership="full" nullable="1">
<doc xml:space="preserve">the serialization for @value
or %NULL if none exists</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a #GValue to serialize</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_set_bitmask" c:identifier="gst_value_set_bitmask">
<doc xml:space="preserve">Sets @value to the bitmask specified by @bitmask.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_BITMASK</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="bitmask" transfer-ownership="none">
<doc xml:space="preserve">the bitmask</doc>
<type name="guint64" c:type="guint64"/>
</parameter>
</parameters>
</function>
<function-macro name="value_set_buffer" c:identifier="gst_value_set_buffer" introspectable="0">
<doc xml:space="preserve">Sets @b as the value of @v. Caller retains reference to buffer.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to receive the data</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">a #GstBuffer to assign to the GstValue</doc>
</parameter>
</parameters>
</function-macro>
<function name="value_set_caps" c:identifier="gst_value_set_caps">
<doc xml:space="preserve">Sets the contents of @value to @caps. A reference to the
provided @caps will be taken by the @value.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_CAPS</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="caps" transfer-ownership="none">
<doc xml:space="preserve">the caps to set the value to</doc>
<type name="Caps" c:type="const GstCaps*"/>
</parameter>
</parameters>
</function>
<function name="value_set_caps_features" c:identifier="gst_value_set_caps_features">
<doc xml:space="preserve">Sets the contents of @value to @features.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_CAPS_FEATURES</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="features" transfer-ownership="none">
<doc xml:space="preserve">the features to set the value to</doc>
<type name="CapsFeatures" c:type="const GstCapsFeatures*"/>
</parameter>
</parameters>
</function>
<function name="value_set_double_range" c:identifier="gst_value_set_double_range">
<doc xml:space="preserve">Sets @value to the range specified by @start and @end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_DOUBLE_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range</doc>
<type name="gdouble" c:type="gdouble"/>
</parameter>
</parameters>
</function>
<function name="value_set_flagset" c:identifier="gst_value_set_flagset" version="1.6">
<doc xml:space="preserve">Sets @value to the flags and mask values provided in @flags and @mask.
The @flags value indicates the values of flags, the @mask represents
which bits in the flag value have been set, and which are "don't care"</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to %GST_TYPE_FLAG_SET</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="flags" transfer-ownership="none">
<doc xml:space="preserve">The value of the flags set or unset</doc>
<type name="guint" c:type="guint"/>
</parameter>
<parameter name="mask" transfer-ownership="none">
<doc xml:space="preserve">The mask indicate which flags bits must match for comparisons</doc>
<type name="guint" c:type="guint"/>
</parameter>
</parameters>
</function>
<function name="value_set_fraction" c:identifier="gst_value_set_fraction">
<doc xml:space="preserve">Sets @value to the fraction specified by @numerator over @denominator.
The fraction gets reduced to the smallest numerator and denominator,
and if necessary the sign is moved to the numerator.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to #GST_TYPE_FRACTION</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="numerator" transfer-ownership="none">
<doc xml:space="preserve">the numerator of the fraction</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denominator" transfer-ownership="none">
<doc xml:space="preserve">the denominator of the fraction</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="value_set_fraction_range" c:identifier="gst_value_set_fraction_range">
<doc xml:space="preserve">Sets @value to the range specified by @start and @end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_FRACTION_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range (a GST_TYPE_FRACTION GValue)</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range (a GST_TYPE_FRACTION GValue)</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="value_set_fraction_range_full" c:identifier="gst_value_set_fraction_range_full">
<doc xml:space="preserve">Sets @value to the range specified by @numerator_start/@denominator_start
and @numerator_end/@denominator_end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_FRACTION_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="numerator_start" transfer-ownership="none">
<doc xml:space="preserve">the numerator start of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denominator_start" transfer-ownership="none">
<doc xml:space="preserve">the denominator start of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="numerator_end" transfer-ownership="none">
<doc xml:space="preserve">the numerator end of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="denominator_end" transfer-ownership="none">
<doc xml:space="preserve">the denominator end of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="value_set_int64_range" c:identifier="gst_value_set_int64_range">
<doc xml:space="preserve">Sets @value to the range specified by @start and @end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT64_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</function>
<function name="value_set_int64_range_step" c:identifier="gst_value_set_int64_range_step">
<doc xml:space="preserve">Sets @value to the range specified by @start, @end and @step.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT64_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
<parameter name="step" transfer-ownership="none">
<doc xml:space="preserve">the step of the range</doc>
<type name="gint64" c:type="gint64"/>
</parameter>
</parameters>
</function>
<function name="value_set_int_range" c:identifier="gst_value_set_int_range">
<doc xml:space="preserve">Sets @value to the range specified by @start and @end.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function name="value_set_int_range_step" c:identifier="gst_value_set_int_range_step">
<doc xml:space="preserve">Sets @value to the range specified by @start, @end and @step.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_INT_RANGE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="start" transfer-ownership="none">
<doc xml:space="preserve">the start of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="end" transfer-ownership="none">
<doc xml:space="preserve">the end of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
<parameter name="step" transfer-ownership="none">
<doc xml:space="preserve">the step of the range</doc>
<type name="gint" c:type="gint"/>
</parameter>
</parameters>
</function>
<function-macro name="value_set_sample" c:identifier="gst_value_set_sample" introspectable="0">
<doc xml:space="preserve">Sets @b as the value of @v. Caller retains reference to sample.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to receive the data</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">a #GstSample to assign to the GstValue</doc>
</parameter>
</parameters>
</function-macro>
<function name="value_set_structure" c:identifier="gst_value_set_structure">
<doc xml:space="preserve">Sets the contents of @value to @structure.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="value" transfer-ownership="none">
<doc xml:space="preserve">a GValue initialized to GST_TYPE_STRUCTURE</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="structure" transfer-ownership="none">
<doc xml:space="preserve">the structure to set the value to</doc>
<type name="Structure" c:type="const GstStructure*"/>
</parameter>
</parameters>
</function>
<function name="value_subtract" c:identifier="gst_value_subtract">
<doc xml:space="preserve">Subtracts @subtrahend from @minuend and stores the result in @dest.
Note that this means subtraction as in sets, not as in mathematics.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the subtraction is not empty</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none" optional="1" allow-none="1">
<doc xml:space="preserve">the destination value
for the result if the subtraction is not empty. May be %NULL,
in which case the resulting set will not be computed, which can
give a fair speedup.</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="minuend" transfer-ownership="none">
<doc xml:space="preserve">the value to subtract from</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="subtrahend" transfer-ownership="none">
<doc xml:space="preserve">the value to subtract</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function-macro name="value_take_buffer" c:identifier="gst_value_take_buffer" introspectable="0">
<doc xml:space="preserve">Sets @b as the value of @v. Caller gives away reference to buffer.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to receive the data</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">a #GstBuffer to assign to the GstValue</doc>
</parameter>
</parameters>
</function-macro>
<function-macro name="value_take_sample" c:identifier="gst_value_take_sample" introspectable="0">
<doc xml:space="preserve">Sets @b as the value of @v. Caller gives away reference to sample.</doc>
<parameters>
<parameter name="v">
<doc xml:space="preserve">a #GValue to receive the data</doc>
</parameter>
<parameter name="b">
<doc xml:space="preserve">a #GstSample to assign to the GstValue</doc>
</parameter>
</parameters>
</function-macro>
<function name="value_union" c:identifier="gst_value_union">
<doc xml:space="preserve">Creates a GValue corresponding to the union of @value1 and @value2.</doc>
<return-value transfer-ownership="none">
<doc xml:space="preserve">%TRUE if the union succeeded.</doc>
<type name="gboolean" c:type="gboolean"/>
</return-value>
<parameters>
<parameter name="dest" direction="out" caller-allocates="1" transfer-ownership="none">
<doc xml:space="preserve">the destination value</doc>
<type name="GObject.Value" c:type="GValue*"/>
</parameter>
<parameter name="value1" transfer-ownership="none">
<doc xml:space="preserve">a value to union</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
<parameter name="value2" transfer-ownership="none">
<doc xml:space="preserve">another value to union</doc>
<type name="GObject.Value" c:type="const GValue*"/>
</parameter>
</parameters>
</function>
<function name="version" c:identifier="gst_version">
<doc xml:space="preserve">Gets the version number of the GStreamer library.</doc>
<return-value transfer-ownership="none">
<type name="none" c:type="void"/>
</return-value>
<parameters>
<parameter name="major" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a guint to store the major version number</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="minor" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a guint to store the minor version number</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="micro" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a guint to store the micro version number</doc>
<type name="guint" c:type="guint*"/>
</parameter>
<parameter name="nano" direction="out" caller-allocates="0" transfer-ownership="full">
<doc xml:space="preserve">pointer to a guint to store the nano version number</doc>
<type name="guint" c:type="guint*"/>
</parameter>
</parameters>
</function>
<function name="version_string" c:identifier="gst_version_string">
<doc xml:space="preserve">This function returns a string that is useful for describing this version
of GStreamer to the outside world: user agent strings, logging, ...</doc>
<return-value transfer-ownership="full">
<doc xml:space="preserve">a newly allocated string describing this version
of GStreamer.</doc>
<type name="utf8" c:type="gchar*"/>
</return-value>
</function>
</namespace>
</repository>
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