gstreamer/docs/gst/tmpl/old/GstBuffer.sgml

<!-- ##### SECTION Title ##### -->
GstBuffer

<!-- ##### SECTION Short_Description ##### -->


<!-- ##### SECTION Long_Description ##### -->
<para>

</para>


<!-- ##### SECTION See_Also ##### -->
<para>

</para>


<!-- ##### STRUCT GstBuffer ##### -->
<para>
The basic structure of a buffer.
</para>

@data_type: 
@data: 
@size: 
@maxsize: 
@timestamp: 
@duration: 
@offset: 
@offset_end: 
@free_data: 
@buffer_private: 
@_gst_reserved: 

<!-- ##### USER_FUNCTION GstBufferFreeDataFunc ##### -->
<para>

</para>

@buffer: 


<!-- ##### MACRO GST_BUFFER_TRACE_NAME ##### -->
<para>
The name used for tracing memory allocations
</para>



<!-- ##### MACRO GST_BUFFER_REFCOUNT ##### -->
<para>
Gets a handle to the refcount structure of the buffer.
</para>

@buf: a #GstBuffer to get the refcount structure of.


<!-- ##### MACRO GST_BUFFER_REFCOUNT_VALUE ##### -->
<para>
Gets the current refcount value of the buffer.
</para>

@buf: a #GstBuffer to get the refcount value of.


<!-- ##### MACRO GST_BUFFER_COPY_FUNC ##### -->
<para>
Calls the buffer-specific copy function on the given buffer.
</para>

@buf: a #GstBuffer to copy.


<!-- ##### MACRO GST_BUFFER_FREE_FUNC ##### -->
<para>
Calls the buffer-specific free function on the given buffer.
</para>

@buf: a #GstBuffer to free.


<!-- ##### MACRO GST_BUFFER_FLAGS ##### -->
<para>
Gets the flags from this buffer.
</para>

@buf: a #GstBuffer to retrieve the flags from.


<!-- ##### MACRO GST_BUFFER_FLAG_IS_SET ##### -->
<para>
Gives the status of a given flag of a buffer.
</para>

@buf: a #GstBuffer to query flags of.
@flag: the #GstBufferFlag to check.


<!-- ##### MACRO GST_BUFFER_FLAG_SET ##### -->
<para>
Sets a buffer flag.
</para>

@buf: a #GstBuffer to modify flags of.
@flag: the #GstBufferFlag to set.


<!-- ##### MACRO GST_BUFFER_FLAG_UNSET ##### -->
<para>
Clears a buffer flag.
</para>

@buf: a #GstBuffer to modify flags of.
@flag: the #GstBufferFlag to clear.


<!-- ##### MACRO GST_BUFFER_DATA ##### -->
<para>
Retrieves a pointer to the data element of this buffer.
</para>

@buf: a #GstBuffer to get data pointer of.
@Returns: the pointer to the actual data contents of the buffer.


<!-- ##### MACRO GST_BUFFER_SIZE ##### -->
<para>
Gets the size of the data in this buffer.
</para>

@buf: a #GstBuffer to get data size of.


<!-- ##### MACRO GST_BUFFER_MAXSIZE ##### -->
<para>
Gets the maximum size of this buffer.
</para>

@buf: a #GstBuffer to get maximum size of.


<!-- ##### MACRO GST_BUFFER_TIMESTAMP ##### -->
<para>
Gets the timestamp for this buffer.
</para>

@buf: a #GstBuffer to get timestamp of.


<!-- ##### MACRO GST_BUFFER_DURATION ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO GST_BUFFER_FORMAT ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO GST_BUFFER_OFFSET ##### -->
<para>
Gets the offset in the source file of this buffer.
</para>

@buf: a #GstBuffer to get offset of.


<!-- ##### MACRO GST_BUFFER_OFFSET_END ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO GST_BUFFER_FREE_DATA_FUNC ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO GST_BUFFER_PRIVATE ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO GST_BUFFER_OFFSET_NONE ##### -->
<para>

</para>



<!-- ##### MACRO GST_BUFFER_MAXSIZE_NONE ##### -->
<para>

</para>



<!-- ##### MACRO GST_BUFFER_DURATION_IS_VALID ##### -->
<para>

</para>

@buffer: 


<!-- ##### MACRO GST_BUFFER_TIMESTAMP_IS_VALID ##### -->
<para>

</para>

@buffer: 


<!-- ##### MACRO GST_BUFFER_OFFSET_IS_VALID ##### -->
<para>

</para>

@buffer: 


<!-- ##### MACRO GST_BUFFER_OFFSET_END_IS_VALID ##### -->
<para>

</para>

@buffer: 


<!-- ##### MACRO GST_BUFFER_MAXSIZE_IS_VALID ##### -->
<para>

</para>

@buffer: 


<!-- ##### ENUM GstBufferFlag ##### -->
<para>
A set of buffer flags used to describe properties of a #GstBuffer.
</para>

@GST_BUFFER_READONLY: the buffer is read-only.
@GST_BUFFER_SUBBUFFER: the buffer is a subbuffer, the parent buffer can be 
                       found with the GST_BUFFER_POOL_PRIVATE() macro.
@GST_BUFFER_ORIGINAL: buffer is not a copy of another buffer.
@GST_BUFFER_DONTFREE: do not try to free the data when this buffer is 
                      unreferenced.
@GST_BUFFER_KEY_UNIT: the buffer holds a key unit, a unit that can be 
                      decoded independently of other buffers.
@GST_BUFFER_DONTKEEP: 
@GST_BUFFER_FLAG_LAST: additional flags can be added starting from this flag.

<!-- ##### FUNCTION gst_buffer_new ##### -->
<para>

</para>

@Returns: 


<!-- ##### FUNCTION gst_buffer_new_and_alloc ##### -->
<para>

</para>

@size: 
@Returns: 


<!-- ##### MACRO gst_buffer_set_data ##### -->
<para>
A convenience function to set the data and size on a buffer
</para>

@buf: The buffer to modify
@data: The data to set on the buffer
@size: The size to set on the buffer


<!-- ##### MACRO gst_buffer_ref ##### -->
<para>
Increases the refcount of the given buffer by one.
</para>

@buf: a #GstBuffer to increase the refcount of.


<!-- ##### MACRO gst_buffer_ref_by_count ##### -->
<para>
Increases the refcount of the buffer by the given value. 
</para>

@buf: a #GstBuffer to increase the refcount of.
@c: the value to add to the refcount.


<!-- ##### MACRO gst_buffer_unref ##### -->
<para>
Decreases the refcount of the buffer. If the refcount reaches 0, the buffer
will be freed.
</para>

@buf: a #GstBuffer to unref.


<!-- ##### FUNCTION gst_buffer_stamp ##### -->
<para>

</para>

@dest: 
@src: 


<!-- ##### MACRO gst_buffer_copy ##### -->
<para>
Copies the given buffer using the copy function of the parent GstData structure.
</para>

@buf: a #GstBuffer to copy.
@Returns: a new #GstBuffer copy of the buffer.


<!-- ##### MACRO gst_buffer_is_writable ##### -->
<para>

</para>

@buf: 


<!-- ##### MACRO gst_buffer_copy_on_write ##### -->
<para>
This function returns a buffer that is safe to write to.
Copy the buffer if the refcount > 1 so that the newly 
created buffer can be safely written to. 
If the refcount is 1, this function just returns the original buffer.
</para>

@buf: a #GstBuffer to copy
@Returns: the #GstBuffer that can safely be written to.


<!-- ##### FUNCTION gst_buffer_create_sub ##### -->
<para>

</para>

@parent: 
@offset: 
@size: 
@Returns: 


<!-- ##### FUNCTION gst_buffer_merge ##### -->
<para>

</para>

@buf1: 
@buf2: 
@Returns: 


<!-- ##### FUNCTION gst_buffer_is_span_fast ##### -->
<para>

</para>

@buf1: 
@buf2: 
@Returns: 


<!-- ##### FUNCTION gst_buffer_span ##### -->
<para>

</para>

@buf1: 
@offset: 
@buf2: 
@len: 
@Returns: 


<!-- ##### FUNCTION gst_buffer_default_free ##### -->
<para>

</para>

@buffer: 


<!-- ##### FUNCTION gst_buffer_default_copy ##### -->
<para>

</para>

@buffer: 
@Returns: