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bf8c785fb0
Original commit message from CVS: Documentation updates. All standard library objects and standard elements are documented. Modified some of the elements to more accuratly report about their arguments so the documentation builds more reasonable output. Added aviencoder and jpegencoder elements (not working yet)
233 lines
3.2 KiB
Text
233 lines
3.2 KiB
Text
<!-- ##### SECTION Title ##### -->
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GstBuffer
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<!-- ##### SECTION Short_Description ##### -->
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Data-passing buffer type, supporting sub-buffers and metadata
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<!-- ##### SECTION Long_Description ##### -->
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<para>
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Buffers are the basic unit of data transfer in GST. The GstBuffer type
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provides all the state necessary to define a region of memory as part of a
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stream. Sub-buffer are also supported, allowing a smaller region of a
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buffer to become its own buffer, with mechanisms in place to ensure that
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nither memory space goes away. Metadata is supported as a list of
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pointers to arbitrary metadata.
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</para>
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<!-- ##### SECTION See_Also ##### -->
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<para>
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</para>
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<!-- ##### MACRO GST_BUFFER_FLAGS ##### -->
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<para>
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get the flags from this buffer
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</para>
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@buf: GstBuffer to retrieve the flags from
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<!-- ##### MACRO GST_BUFFER_FLAG_IS_SET ##### -->
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<para>
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gives the status of a given flag
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</para>
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@buf: GstBuffer to query
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@flag: the flag to check
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<!-- ##### MACRO GST_BUFFER_FLAG_SET ##### -->
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<para>
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set a flag in a buffer
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</para>
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@buf: GstBuffer to query
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@flag: the flag to set
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<!-- ##### MACRO GST_BUFFER_FLAG_UNSET ##### -->
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<para>
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clear a flag in a buffer
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</para>
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@buf: GstBuffer to modify
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@flag: the flag to clear
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<!-- ##### MACRO GST_BUFFER_TYPE ##### -->
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<para>
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</para>
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_DATA ##### -->
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<para>
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retrieves a pointer to the data element of this buffer
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</para>
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_SIZE ##### -->
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<para>
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get the size of the data in this buffer
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</para>
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_OFFSET ##### -->
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<para>
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</para>
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_MAXSIZE ##### -->
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<para>
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</para>
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@buf: GstBuffer
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<!-- ##### MACRO GST_BUFFER_TIMESTAMP ##### -->
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<para>
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get the timestamp for this buffer
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</para>
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@buf: GstBuffer
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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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possible.
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</para>
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@buf: GstBuffer to lock
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<!-- ##### MACRO GST_BUFFER_TRYLOCK ##### -->
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<para>
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This macro will try to obtain a lock on the object, but will return with
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FALSE if it can't get it immediately.
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</para>
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@buf: GstBuffer to try to lock
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<!-- ##### MACRO GST_BUFFER_UNLOCK ##### -->
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<para>
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this macro releases a lock on the object.
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</para>
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@buf: GstBuffer to unlock.
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<!-- ##### ENUM GstBufferFlags ##### -->
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<para>
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</para>
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<!-- ##### STRUCT GstBuffer ##### -->
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<para>
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</para>
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<!-- ##### FUNCTION gst_buffer_new ##### -->
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<para>
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</para>
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@Returns:
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<!-- ##### FUNCTION gst_buffer_create_sub ##### -->
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<para>
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</para>
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@parent:
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@offset:
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@size:
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@Returns:
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<!-- ##### FUNCTION gst_buffer_ref ##### -->
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<para>
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</para>
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@buffer:
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<!-- ##### FUNCTION gst_buffer_ref_by_count ##### -->
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<para>
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</para>
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@buffer:
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@count:
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<!-- ##### FUNCTION gst_buffer_unref ##### -->
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<para>
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</para>
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@buffer:
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<!-- ##### FUNCTION gst_buffer_destroy ##### -->
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<para>
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</para>
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@buffer:
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<!-- ##### FUNCTION gst_buffer_add_meta ##### -->
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<para>
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</para>
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@buffer:
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@meta:
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<!-- ##### FUNCTION gst_buffer_get_first_meta ##### -->
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<para>
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</para>
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@buffer:
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@Returns:
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<!-- ##### FUNCTION gst_buffer_get_metas ##### -->
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<para>
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</para>
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@buffer:
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@Returns:
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<!-- ##### FUNCTION gst_buffer_remove_meta ##### -->
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<para>
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</para>
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@buffer:
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@meta:
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