mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-23 08:46:40 +00:00
Removed the last bits of Metadata.
Original commit message from CVS: Removed the last bits of Metadata. Updated the bufferpool docs.
This commit is contained in:
Wim Taymans
parent
ef64fa0d04
commit
5d2a56cd7c
11 changed files with 463 additions and 69 deletions
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@ -9,7 +9,6 @@
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<!entity GstCpu SYSTEM "sgml/gstcpu.sgml">
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<!entity GstElement SYSTEM "sgml/gstelement.sgml">
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<!entity GstLog SYSTEM "sgml/gstlog.sgml">
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<!entity GstMeta SYSTEM "sgml/gstmeta.sgml">
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<!entity GstObject SYSTEM "sgml/gstobject.sgml">
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<!entity GstPad SYSTEM "sgml/gstpad.sgml">
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<!entity GstPipeline SYSTEM "sgml/gstpipeline.sgml">
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@ -56,7 +55,7 @@
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<title>GStreamer Core Library</title>
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<para>libgst.la provides all the core GStreamer services,
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including initialization, plugin management, types and metadata, as
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including initialization, plugin management and types, as
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well as the object hiarchy that defines elements and bins, along
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with some more specialized elements.</para>
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@ -69,7 +68,6 @@ with some more specialized elements.</para>
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&GstCpu;
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&GstElement;
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&GstInfo;
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&GstMeta;
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&GstObject;
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&GstPad;
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&GstParse;
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@ -140,14 +138,6 @@ with some more specialized elements.</para>
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&GstTee;
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</chapter>
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<chapter id="metatdata-types">
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<title>GStreamer MetaData Types</title>
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<para>MetaData is used to specify the content of buffers. See <classname>GstMeta</classname>. </para>
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&spectrum;
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</chapter>
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<chapter id="autopluggers">
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<title>GStreamer Autoppluggers</title>
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@ -1,5 +1,152 @@
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<INCLUDE>gst/gst.h</INCLUDE>
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<SECTION>
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<FILE>gobject2gtk</FILE>
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GObject
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G_MAXUINT
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G_MAXULONG
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g_object_ref
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g_object_unref
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G_TYPE_CHECK_INSTANCE_CAST
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G_TYPE_CHECK_INSTANCE_TYPE
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G_TYPE_CHECK_CLASS_CAST
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G_TYPE_CHECK_CLASS_TYPE
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G_TYPE_FROM_CLASS
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G_OBJECT_TYPE
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G_OBJECT_CLASS_TYPE
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G_TYPE_NONE
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G_TYPE_CHAR
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G_TYPE_UCHAR
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G_TYPE_BOOLEAN
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G_TYPE_INT
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G_TYPE_UINT
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G_TYPE_LONG
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G_TYPE_ULONG
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G_TYPE_ENUM
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G_TYPE_FLAGS
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G_TYPE_FLOAT
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G_TYPE_DOUBLE
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G_TYPE_STRING
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G_TYPE_POINTER
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G_TYPE_BOXED
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G_TYPE_PARAM
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g_cclosure_marshal_VOID__VOID
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g_cclosure_marshal_VOID__BOOLEAN
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g_cclosure_marshal_VOID__CHAR
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g_cclosure_marshal_VOID__UCHAR
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g_cclosure_marshal_VOID__INT
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g_cclosure_marshal_VOID__UINT
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g_cclosure_marshal_VOID__LONG
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g_cclosure_marshal_VOID__ULONG
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g_cclosure_marshal_VOID__ENUM
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g_cclosure_marshal_VOID__FLAGS
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g_cclosure_marshal_VOID__FLOAT
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g_cclosure_marshal_VOID__DOUBLE
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g_cclosure_marshal_VOID__STRING
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g_cclosure_marshal_VOID__PARAM
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g_cclosure_marshal_VOID__BOXED
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g_cclosure_marshal_VOID__POINTER
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g_cclosure_marshal_STRING__OBJECT_POINTER
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g_cclosure_marshal_VOID__UINT_POINTER
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gst_marshal_VOID__OBJECT_POINTER
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gst_marshal_VOID__INT_INT
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g_object_get_property
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g_object_set
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GType
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GTypeFlags
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GClassInitFunc
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GBaseInitFunc
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GInstanceInitFunc
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g_type_class_ref
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g_type_class_unref
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g_type_name
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g_type_from_name
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GEnumValue
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g_enum_register_static
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GTypeInfo
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G_TYPE_FLAG_ABSTRACT
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g_type_register_static
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g2g_type_register_static
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g_object_new
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g2g_object_new
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G_SIGNAL_RUN_LAST
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G_SIGNAL_RUN_FIRST
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GCallback
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G_CALLBACK
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g_signal_newc
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g2g_signal_newc
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g_signal_lookup
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g_signal_handler_block
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g_signal_handler_unblock
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GValue
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GParamFlags
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G_VALUE_TYPE
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G_PARAM_READWRITE
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G_PARAM_READABLE
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G_PARAM_WRITABLE
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G_OBJECT_WARN_INVALID_PROPERTY_ID
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GParamSpec
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g_value_init
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g_object_class_install_property
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g2g_object_class_install_property
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g_object_class_find_property
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g2g_object_class_find_property
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g_object_class_list_properties
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g2g_object_class_list_properties
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G_IS_PARAM_SPEC_ENUM
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g_param_spec_boolean
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g2g_param_spec_boolean
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g_param_spec_int
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g2g_param_spec_int
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g_param_spec_uint
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g2g_param_spec_uint
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g_param_spec_long
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g2g_param_spec_long
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g_param_spec_ulong
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g2g_param_spec_ulong
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g_param_spec_float
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g2g_param_spec_float
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g_param_spec_double
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g2g_param_spec_double
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g_param_spec_enum
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g2g_param_spec_enum
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g_param_spec_pointer
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g2g_param_spec_pointer
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g_param_spec_string
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g2g_param_spec_string
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g_value_get_boolean
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g_value_set_boolean
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g_value_get_enum
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g_value_set_enum
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g_value_get_int
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g_value_set_int
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g_value_get_uint
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g_value_set_uint
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g_value_get_long
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g_value_set_long
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g_value_get_ulong
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g_value_set_ulong
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g_value_get_float
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g_value_set_float
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g_value_get_double
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g_value_set_double
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g_value_get_string
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g_value_set_string
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g_value_get_pointer
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g_value_set_pointer
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G_OBJECT
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<TITLE>GObject</TITLE>
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g_object_get_type
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<SUBSECTION Standard>
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g_cclosure_marshal_VOID__OBJECT
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G_IS_OBJECT
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G_TYPE_OBJECT
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g2g_object_get_type
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G_OBJECT_CLASS
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G_IS_OBJECT_CLASS
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G_OBJECT_GET_CLASS
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</SECTION>
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<SECTION>
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<FILE>cothreads</FILE>
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CURRENT_STACK_FRAME
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@ -167,6 +314,7 @@ GST_BUFFER_MAXSIZE
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GST_BUFFER_TIMESTAMP
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GST_BUFFER_BUFFERPOOL
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GST_BUFFER_POOL_PRIVATE
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GST_BUFFER_POOL_LOCK
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GST_BUFFER_LOCK
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GST_BUFFER_TRYLOCK
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GST_BUFFER_UNLOCK
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@ -334,22 +482,6 @@ gst_info
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<SUBSECTION Standard>
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</SECTION>
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<SECTION>
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<FILE>gstmeta</FILE>
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GST_META_FLAGS
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GST_META_FLAG_IS_SET
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GST_META_FLAG_SET
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GST_META_FLAG_UNSET
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GstMetaFlags
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GstMeta
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gst_meta_new_size
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gst_meta_new
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gst_meta_ref
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gst_meta_unref
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<SUBSECTION Standard>
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GST_META
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</SECTION>
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<SECTION>
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<FILE>gstobject</FILE>
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<TITLE>GstObject</TITLE>
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@ -755,7 +887,6 @@ gst_util_get_float_arg
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gst_util_get_double_arg
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gst_util_get_string_arg
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gst_util_get_pointer_arg
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gst_util_get_widget_arg
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gst_util_dump_mem
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<SUBSECTION Standard>
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</SECTION>
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@ -1003,9 +1134,3 @@ GST_MULTIDISKSRC_CLASS
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GST_IS_MULTIDISKSRC_CLASS
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</SECTION>
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<SECTION>
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<INCLUDE>gst/meta/spectrum.h</INCLUDE>
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<FILE>spectrum</FILE>
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MetaAudioSpectrum
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</SECTION>
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@ -2,23 +2,23 @@ GtkObject
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GtkWidget
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GtkRange
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GtkContainer
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GstObject
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GstXML
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GstElement
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GstBin
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GstPipeline
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GstThread
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GstTee
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GstFakeSrc
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GstFakeSink
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GstDiskSrc
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GstHttpSrc
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GstFdSrc
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GstSineSrc
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GstFdSink
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GstPipefilter
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GstIdentity
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GstQueue
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GstTypeFind
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GstPad
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GstSignalObject
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GObject
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GstObject
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GstXml
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GstElement
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GstBin
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GstPipeline
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GstThread
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GstTee
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GstFakeSrc
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GstFakeSink
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GstDiskSrc
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GstHttpSrc
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GstFdSrc
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GstSineSrc
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GstFdSink
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GstPipefilter
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GstIdentity
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GstQueue
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GstTypeFind
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GstPad
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@ -151,6 +151,14 @@ Get the bufferpool private data.
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_POOL_LOCK ##### -->
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<para>
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</para>
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@pool:
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<!-- ##### MACRO GST_BUFFER_LOCK ##### -->
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<para>
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This macro will obtain a lock on the object, making serialization
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@ -51,7 +51,7 @@ A bufferpool can be requested from a pad with the gst_pad_get_bufferpool() funct
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</para>
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@new_buffer:
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@lock:
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@new_user_data:
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@destroy_user_data:
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@destroy_buffer:
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@ -103,6 +103,33 @@ the pool.
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@buffer:
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<!-- ##### FUNCTION gst_buffer_pool_ref ##### -->
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<para>
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</para>
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@pool:
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<!-- ##### FUNCTION gst_buffer_pool_ref_by_count ##### -->
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<para>
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</para>
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@pool:
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@count:
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<!-- ##### FUNCTION gst_buffer_pool_unref ##### -->
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<para>
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</para>
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@pool:
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<!-- # Unused Parameters # -->
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@buffer:
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<!-- ##### FUNCTION gst_buffer_pool_set_create_function ##### -->
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<para>
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@ -131,3 +158,14 @@ the pool.
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@pool:
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<!-- ##### FUNCTION gst_buffer_pool_get_default ##### -->
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<para>
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</para>
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@oldpool:
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@buffer_size:
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@pool_size:
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@Returns:
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@ -35,7 +35,7 @@ use gst_element_set_state() to change the state of an element.
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</para>
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@GST_STATE_NONE_PENDING: The element is in the desired state.
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@GST_STATE_VOID_PENDING:
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@GST_STATE_NULL: Reset the state of an element.
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@GST_STATE_READY: will make the element ready to start processing data. some
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elements might have a non trivial way to initialize themselves.
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@ -271,7 +271,7 @@ The function that will be called when pulling buffers.
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the region types for #gst_pad_pullregion.
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</para>
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@GST_REGION_NONE: no type specified
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@GST_REGION_VOID:
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@GST_REGION_OFFSET_LEN: an offet/length pair
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@GST_REGION_TIME_LEN: a time start/length pair
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@ -67,9 +67,7 @@ to bring it into memory.
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@numtypes:
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@elements:
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@numelements:
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@autopluggers:
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@numautopluggers:
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@loaded:
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<!-- ##### USER_FUNCTION GstPluginInitFunc ##### -->
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<para>
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@ -220,6 +220,10 @@ the stream.
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@obj:
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<!-- ##### SECTION ./tmpl/gstmeta.sgml:Short_Description ##### -->
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Provide context for buffers
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<!-- ##### MACRO DEBUG_ENTER_STRING ##### -->
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<para>
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@ -424,6 +428,13 @@ Generic connection between elements.
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@overlay_info:
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@dga_info:
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<!-- ##### FUNCTION gst_meta_ref ##### -->
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<para>
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</para>
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@meta:
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<!-- ##### SECTION ./tmpl/gstaudiosink.sgml:See_Also ##### -->
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<para>
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@ -670,6 +681,13 @@ Specify the current offset in the file.
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</para>
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<!-- ##### FUNCTION gst_meta_unref ##### -->
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<para>
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</para>
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@meta:
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<!-- ##### STRUCT GstSineSrc ##### -->
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<para>
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|
@ -686,6 +704,10 @@ Specify the current offset in the file.
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@sheight:
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@bytes_per_line:
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<!-- ##### SECTION ./tmpl/spectrum.sgml:Title ##### -->
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spectrum
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|
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|
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<!-- ##### SECTION ./tmpl/GstElement.sgml:Long_Description ##### -->
|
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<para>
|
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|
||||
|
|
@ -1325,6 +1347,10 @@ subclasses can use this value to start the enumeration of their flags
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</para>
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||||
|
||||
|
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<!-- ##### SECTION ./tmpl/spectrum.sgml:Short_Description ##### -->
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Frequencies of a spectrum analysis.
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|
||||
|
||||
<!-- ##### FUNCTION gst_asyncdisksrc_get_type ##### -->
|
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<para>
|
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|
||||
|
|
@ -1388,6 +1414,13 @@ Indicates a sinkpad for the padfactory.
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@name:
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@Returns:
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|
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<!-- ##### MACRO GST_META_FLAGS ##### -->
|
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<para>
|
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Retrieve the flags of the given meta information.
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</para>
|
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|
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@meta: the meta information
|
||||
|
||||
<!-- ##### FUNCTION gst_element_request_pad ##### -->
|
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<para>
|
||||
|
||||
|
|
@ -1440,6 +1473,16 @@ This macro checks to see if the given state is set.
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@obj: Element to check for state.
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@flag: State to check for, must be a single bit in guint32.
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|
||||
<!-- ##### STRUCT GstMeta ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
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@lock: for locking purposes
|
||||
@flags: the flags of the meta data
|
||||
@data: the meta data
|
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@size: the size of the meta data
|
||||
|
||||
<!-- ##### FUNCTION gst_xml_new_from_memory ##### -->
|
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<para>
|
||||
|
||||
|
|
@ -1784,6 +1827,12 @@ The Element is going from the READY state to the PLAYING state.
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|||
</para>
|
||||
|
||||
|
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<!-- ##### SECTION ./tmpl/gstmeta.sgml:See_Also ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
|
||||
<!-- ##### MACRO GST_IS_TEE_CLASS ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -1798,6 +1847,105 @@ The Element is going from the READY state to the PLAYING state.
|
|||
|
||||
@arg:
|
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|
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<!-- ##### SECTION ./tmpl/gstmeta.sgml:Long_Description ##### -->
|
||||
<para>
|
||||
The point of the metadata is to provide some context for each buffer. In
|
||||
the case of audio data, for instance, it would provide the samplerate, bit
|
||||
depth, and channel count.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The trick is that there may be multiple types of metadata ganged onto a
|
||||
single buffer. This is why they're going to be a GList. This does mean
|
||||
extra overhead in all cases, but I think it's minimal. The GList type
|
||||
uses a chunk allocater so we're not wasting too much memory or time when
|
||||
adding to the list.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The trick is dealing with these structs as they pass through a pipeline,
|
||||
since they have potentially different mutability properties. For
|
||||
instance, if you've got a mp3 decoder connected to a tee, which sends the
|
||||
buffers off to both the decoder and a spectrum analyzer (and then a
|
||||
visualization element). The preferred setup would be where every time a
|
||||
audio/raw metadata comes down the pipe (indicating a potential change in
|
||||
audio format), the audiosink and spectrum would just save off pointers.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
So when exactly does this metadata go away (deallocated)? Well, that
|
||||
means metadata has to be refcounted. But that gets rather hairy. OK, in
|
||||
the simple case you create a metadata struct, it comes with refcount set
|
||||
to 1. You pass it through, it stays one, eventually someone drops the
|
||||
last reference on the buffer it's tied to, you free the metadata too.
|
||||
Easy. What if you tee? You could go through and for every metadata in
|
||||
the buffer, increment the refcount by the same as the buffer. So in the
|
||||
above case (tee'd), the audiosink and spectrum would get the buffer with a
|
||||
refcount of 2, and it'd have a metadata with refcount 2. Do they ref it
|
||||
each themselves, then unref the buffer? Or do they remove the metadata?
|
||||
Removing the metadata would require a buffer CoW, which would suck, so
|
||||
yes, they'd just ref the metadata.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
But.... what if they're all in different threads? Then we're off into
|
||||
the magical world of mutexes. Everything with a refcount in a threaded
|
||||
world must be mutexed, else you can do atomic increment and atomic
|
||||
dec and test. Can this be done from C easily? Perhaps it needs to be found
|
||||
from kernel includes via autoconf?
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The goal in designing the way metadata will be defined and used is to keep
|
||||
it as simple as possible. The basis for accomplishing this is the fact
|
||||
that in order to actually use (rather than just pass) the metadata, you
|
||||
have to know what the fields are, which means you have to have compiled in
|
||||
support for that metadata at build time. Therefore, if you're using
|
||||
metadata, you must have build-time access to the necessary include file
|
||||
that defines it.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
So, given that you've got an include file, it would be nice if the whole
|
||||
thing could be contained there. This would limit the need to be linked
|
||||
against something, or have load-time requirements as to that has to be
|
||||
loaded before you are.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Given that really all metadata is is a region of memory of a given size
|
||||
with a certain signature, this isn't all that hard. First you lay out the
|
||||
struct that defines the metadata. Then you set up #defines that expand to
|
||||
the size of the struct in question, as well as the four-cc code that
|
||||
defines the type.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
The work is done by a few #defines, a la the #defines used in all Gtk
|
||||
objects. The first is a NEW() method that allocates the memory for the
|
||||
metadata and fills in all the normal fields (type, size, utility
|
||||
functions). Because of the way it's defined (as a #define, no less),
|
||||
you'll have to invoke it as META_NEW(meta), since it can't return()
|
||||
anything.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
Another #define will check to make sure a meta is indeed that type by
|
||||
verifying the type code and size. Theoretically, meta types can overlap
|
||||
with the same fourcc code, as long as they have different sizes. But I
|
||||
probably ought to have a global public registry so people writing things
|
||||
don't conflict. MSFT got that right, at least.
|
||||
</para>
|
||||
|
||||
<para>
|
||||
So, a hairy problem is what to do when there are utility functions
|
||||
associated with one of these things. One option is to not bother with
|
||||
them. This is very likely a possible solution, since metadata is supposed
|
||||
to be flat memory of a given size. Not much to do to either free or copy
|
||||
it, is there?
|
||||
</para>
|
||||
|
||||
|
||||
<!-- ##### SECTION ./tmpl/gstconnection.sgml:Title ##### -->
|
||||
GstConnection
|
||||
|
||||
|
|
@ -1868,6 +2016,14 @@ GstElement
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### MACRO GST_META_FLAG_UNSET ##### -->
|
||||
<para>
|
||||
Clear a flag in the meta data.
|
||||
</para>
|
||||
|
||||
@meta: the meta data
|
||||
@flag: the flag to clear
|
||||
|
||||
<!-- ##### MACRO GST_IS_FAKESRC ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2484,6 +2640,14 @@ The number of bytes per read.
|
|||
|
||||
@obj:
|
||||
|
||||
<!-- ##### FUNCTION gst_meta_new_size ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
@size:
|
||||
@Returns:
|
||||
|
||||
<!-- ##### MACRO ERROR_OBJECT ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2598,6 +2762,19 @@ This macro sets the given state on the element.
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### ENUM GstMetaFlags ##### -->
|
||||
<para>
|
||||
Flags indicating properties about the meta data.
|
||||
</para>
|
||||
|
||||
@GST_META_FREEABLE: the meta data can be freed
|
||||
|
||||
<!-- ##### SECTION ./tmpl/spectrum.sgml:See_Also ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
|
||||
<!-- ##### MACRO GST_CONNECTION ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2708,6 +2885,10 @@ This macro checks to see if the GST_SRC_ASYNC flag is set.
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### SECTION ./tmpl/gstmeta.sgml:Title ##### -->
|
||||
GstMeta
|
||||
|
||||
|
||||
<!-- ##### TYPEDEF GstCapsFactory ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2733,6 +2914,15 @@ A flag indicating that SSE instructions are supported.
|
|||
|
||||
@obj:
|
||||
|
||||
<!-- ##### FUNCTION gst_util_get_widget_arg ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
@object:
|
||||
@argname:
|
||||
@Returns:
|
||||
|
||||
<!-- ##### ARG GstAsyncDiskSrc:size ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2775,6 +2965,14 @@ to the current function, i.e. "('element')"
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### MACRO GST_META_FLAG_SET ##### -->
|
||||
<para>
|
||||
Set a flag in the meta data.
|
||||
</para>
|
||||
|
||||
@meta: the meta data
|
||||
@flag: the flag to set
|
||||
|
||||
<!-- ##### MACRO GST_IS_SRC ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2808,6 +3006,14 @@ Information about audio buffers.
|
|||
@GST_CAPS_ALWAYS:
|
||||
@GST_CAPS_MAYBE:
|
||||
|
||||
<!-- ##### MACRO GST_META_FLAG_IS_SET ##### -->
|
||||
<para>
|
||||
Check if a given flag is set.
|
||||
</para>
|
||||
|
||||
@meta: the meta data to test
|
||||
@flag: the flag to test
|
||||
|
||||
<!-- ##### STRUCT GstPadClass ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2837,6 +3043,13 @@ Information about audio buffers.
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### MACRO gst_meta_new ##### -->
|
||||
<para>
|
||||
Create new meta data.
|
||||
</para>
|
||||
|
||||
@type: the type of the meta data to create
|
||||
|
||||
<!-- ##### FUNCTION plugin_initialize ##### -->
|
||||
<para>
|
||||
|
||||
|
|
@ -2887,6 +3100,13 @@ Specify the location of the file to read.
|
|||
@audiosink:
|
||||
@format:
|
||||
|
||||
<!-- ##### SECTION ./tmpl/spectrum.sgml:Long_Description ##### -->
|
||||
<para>
|
||||
Frequencies of a spectrum analysis.
|
||||
|
||||
</para>
|
||||
|
||||
|
||||
<!-- ##### SECTION ./tmpl/gstaudiosrc.sgml:Title ##### -->
|
||||
GstAudioSrc
|
||||
|
||||
|
|
@ -2949,6 +3169,19 @@ Get the current number of bytes read.
|
|||
</para>
|
||||
|
||||
|
||||
<!-- ##### STRUCT MetaAudioSpectrum ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
@meta:
|
||||
@bands:
|
||||
@channels:
|
||||
@interleaved:
|
||||
@lowfreq:
|
||||
@highfreq:
|
||||
@steps:
|
||||
|
||||
<!-- ##### SECTION ./tmpl/plugin.sgml:Title ##### -->
|
||||
plugin
|
||||
|
||||
|
|
|
|||
|
|
@ -94,16 +94,6 @@ Some convenience functions
|
|||
@Returns:
|
||||
|
||||
|
||||
<!-- ##### FUNCTION gst_util_get_widget_arg ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
@object:
|
||||
@argname:
|
||||
@Returns:
|
||||
|
||||
|
||||
<!-- ##### FUNCTION gst_util_dump_mem ##### -->
|
||||
<para>
|
||||
|
||||
|
|
|
|||
|
|
@ -20,6 +20,9 @@ All GstElements can be serialized to an XML presentation and subsequently loaded
|
|||
|
||||
</para>
|
||||
|
||||
@object:
|
||||
@topelements:
|
||||
@ns:
|
||||
|
||||
<!-- ##### FUNCTION gst_xml_new ##### -->
|
||||
<para>
|
||||
|
|
@ -91,3 +94,12 @@ All GstElements can be serialized to an XML presentation and subsequently loaded
|
|||
@Returns:
|
||||
|
||||
|
||||
<!-- ##### SIGNAL GstXml::object-loaded ##### -->
|
||||
<para>
|
||||
|
||||
</para>
|
||||
|
||||
@gstxml: the object which received the signal.
|
||||
@arg1:
|
||||
@arg2:
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue