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255 lines
4.2 KiB
Text
255 lines
4.2 KiB
Text
<!-- ##### SECTION Title ##### -->
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GstData
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<!-- ##### SECTION Short_Description ##### -->
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Common structure for GstBuffer, GstBufferPool, and GstEvent
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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This abstract structure provides a common base for #GstBuffer, #GstBufferPool
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and #GstEvent. It is the main data type that is passed along in a pipeline.
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GstData provides refcounting, freeing and copying for its child classes.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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#GstBuffer, #GstBufferPool, #GstEvent
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</para>
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<!-- ##### MACRO GST_DATA ##### -->
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<para>
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Cast a pointer to a GstData
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</para>
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@data: The pointer to cast
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<!-- ##### MACRO GST_DATA_TYPE ##### -->
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<para>
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Get the type of the GstData
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</para>
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@data: The data to get the type of
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<!-- ##### MACRO GST_DATA_FLAGS ##### -->
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<para>
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Get the flags of this GstData
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</para>
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@data: The data to get the flags of
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<!-- ##### MACRO GST_DATA_FLAG_SHIFT ##### -->
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<para>
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Shift a given flag so that it can be used in an or operation
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</para>
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@flag: The flag to shift
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<!-- ##### MACRO GST_DATA_FLAG_IS_SET ##### -->
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<para>
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Check if a given flag is set on the data
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</para>
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@data: The data to check
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@flag: The flag to check for
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<!-- ##### MACRO GST_DATA_FLAG_SET ##### -->
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<para>
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Set the flag on the data
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</para>
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@data: The data to set the flag on
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@flag: The flag to set
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<!-- ##### MACRO GST_DATA_FLAG_UNSET ##### -->
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<para>
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Unset the given flag
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</para>
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@data: The data to unset the flag of
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@flag: The flag to unset
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<!-- ##### STRUCT GstData ##### -->
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<para>
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The base structure
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</para>
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@type: The type of this data.
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@refcount: A refcount
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@flags: The flags of this GstData
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@free: A pointer to a custom free function
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@copy: A pointer to a custom copy function
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<!-- ##### USER_FUNCTION GstDataFreeFunction ##### -->
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<para>
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The signature of the free function. Subclasses should provide a free function
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with this signature and pass it in the gst_data_init() function.
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</para>
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@data: The GstData to free
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<!-- ##### USER_FUNCTION GstDataCopyFunction ##### -->
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<para>
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The signature of the copy function. Subclasses should provide a copy function
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with this signature and pass it in the gst_data_init() function.
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</para>
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@data: The GstData to copy
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@Returns: A new GstData that is a copy of data
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<!-- ##### ENUM GstDataFlags ##### -->
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<para>
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Various flags that can be set on a GstData
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</para>
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@GST_DATA_READONLY: The data is readonly
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@GST_DATA_FLAG_LAST: Subclasses can add additional flags starting from this offset
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<!-- ##### MACRO GST_DATA_IS_READONLY ##### -->
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<para>
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Query if the GstData is READONLY
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</para>
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@data: The data to query
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<!-- ##### MACRO GST_DATA_REFCOUNT ##### -->
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<para>
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Get access to the refcount field of the GstData
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</para>
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@data: The GstData to get the refcount field of
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<!-- ##### MACRO GST_DATA_REFCOUNT_VALUE ##### -->
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<para>
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Get the current refcount value
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</para>
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@data: The GstData to query
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<!-- ##### MACRO GST_DATA_REFCOUNT_READ ##### -->
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<para>
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Read the current refcount value into the specified value
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</para>
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@data: The GstData to get the refcount value of
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@value: A pointer to a gint to hold the refcount value
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<!-- ##### MACRO GST_DATA_COPY_FUNC ##### -->
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<para>
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Get access to the copy function of the data
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</para>
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@data: The data to query
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<!-- ##### MACRO GST_DATA_FREE_FUNC ##### -->
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<para>
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Get access to the free function of the data
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</para>
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@data: The data to query
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<!-- ##### FUNCTION gst_data_init ##### -->
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<para>
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</para>
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@data:
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@type:
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@flags:
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@free:
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@copy:
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<!-- ##### FUNCTION gst_data_dispose ##### -->
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<para>
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</para>
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@data:
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<!-- ##### FUNCTION gst_data_copy_into ##### -->
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<para>
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</para>
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@data:
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@target:
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<!-- ##### FUNCTION gst_data_copy ##### -->
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<para>
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</para>
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@data:
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@Returns:
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<!-- ##### FUNCTION gst_data_needs_copy_on_write ##### -->
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<para>
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</para>
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@data:
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@Returns:
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<!-- ##### FUNCTION gst_data_copy_on_write ##### -->
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<para>
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</para>
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@data:
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@Returns:
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<!-- ##### FUNCTION gst_data_free ##### -->
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<para>
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</para>
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@data:
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<!-- ##### FUNCTION gst_data_ref ##### -->
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<para>
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</para>
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@data:
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@Returns:
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<!-- ##### FUNCTION gst_data_ref_by_count ##### -->
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<para>
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</para>
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@data:
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@count:
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@Returns:
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<!-- ##### FUNCTION gst_data_unref ##### -->
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<para>
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</para>
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@data:
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