gstreamer/docs/gst/tmpl/gstdata.sgml

<!-- ##### SECTION Title ##### -->
GstData

<!-- ##### SECTION Short_Description ##### -->
Common structure for GstBuffer, GstBufferPool, and GstEvent

<!-- ##### SECTION Long_Description ##### -->
<para>
This abstract structure provides a common base for #GstBuffer, #GstBufferPool 
and #GstEvent. It is the main data type that is passed along in a pipeline. 
GstData provides refcounting, freeing and copying for its child classes.
</para>

<!-- ##### SECTION See_Also ##### -->
<para>
#GstBuffer, #GstBufferPool, #GstEvent
</para>

<!-- ##### MACRO GST_DATA ##### -->
<para>
Cast a pointer to a GstData
</para>

@data: The pointer to cast


<!-- ##### MACRO GST_DATA_TYPE ##### -->
<para>
Get the type of the GstData
</para>

@data: The data to get the type of


<!-- ##### MACRO GST_DATA_FLAGS ##### -->
<para>
Get the flags of this GstData
</para>

@data: The data to get the flags of


<!-- ##### MACRO GST_DATA_FLAG_SHIFT ##### -->
<para>
Shift a given flag so that it can be used in an or operation
</para>

@flag: The flag to shift


<!-- ##### MACRO GST_DATA_FLAG_IS_SET ##### -->
<para>
Check if a given flag is set on the data
</para>

@data: The data to check
@flag: The flag to check for


<!-- ##### MACRO GST_DATA_FLAG_SET ##### -->
<para>
Set the flag on the data
</para>

@data: The data to set the flag on
@flag: The flag to set


<!-- ##### MACRO GST_DATA_FLAG_UNSET ##### -->
<para>
Unset the given flag
</para>

@data: The data to unset the flag of
@flag: The flag to unset


<!-- ##### STRUCT GstData ##### -->
<para>
The base structure
</para>

@type: The type of this data.
@refcount: A refcount
@flags: The flags of this GstData
@free: A pointer to a custom free function
@copy: A pointer to a custom copy function

<!-- ##### USER_FUNCTION GstDataFreeFunction ##### -->
<para>
The signature of the free function. Subclasses should provide a free function
with this signature and pass it in the gst_data_init() function.
</para>

@data: The GstData to free


<!-- ##### USER_FUNCTION GstDataCopyFunction ##### -->
<para>
The signature of the copy function. Subclasses should provide a copy function
with this signature and pass it in the gst_data_init() function.
</para>

@data: The GstData to copy
@Returns: A new GstData that is a copy of data


<!-- ##### ENUM GstDataFlags ##### -->
<para>
Various flags that can be set on a GstData
</para>

@GST_DATA_READONLY: The data is readonly
@GST_DATA_FLAG_LAST: Subclasses can add additional flags starting from this offset

<!-- ##### MACRO GST_DATA_IS_READONLY ##### -->
<para>
Query if the GstData is READONLY
</para>

@data: The data to query


<!-- ##### MACRO GST_DATA_REFCOUNT ##### -->
<para>
Get access to the refcount field of the GstData
</para>

@data: The GstData to get the refcount field of


<!-- ##### MACRO GST_DATA_REFCOUNT_VALUE ##### -->
<para>
Get the current refcount value
</para>

@data: The GstData to query


<!-- ##### MACRO GST_DATA_REFCOUNT_READ ##### -->
<para>
Read the current refcount value into the specified value
</para>

@data: The GstData to get the refcount value of
@value: A pointer to a gint to hold the refcount value


<!-- ##### MACRO GST_DATA_COPY_FUNC ##### -->
<para>
Get access to the copy function of the data
</para>

@data: The data to query


<!-- ##### MACRO GST_DATA_FREE_FUNC ##### -->
<para>
Get access to the free function of the data
</para>

@data: The data to query


<!-- ##### FUNCTION gst_data_init ##### -->
<para>

</para>

@data: 
@type: 
@flags: 
@free: 
@copy: 


<!-- ##### FUNCTION gst_data_dispose ##### -->
<para>

</para>

@data: 


<!-- ##### FUNCTION gst_data_copy_into ##### -->
<para>

</para>

@data: 
@target: 


<!-- ##### FUNCTION gst_data_copy ##### -->
<para>

</para>

@data: 
@Returns: 


<!-- ##### FUNCTION gst_data_needs_copy_on_write ##### -->
<para>

</para>

@data: 
@Returns: 


<!-- ##### FUNCTION gst_data_copy_on_write ##### -->
<para>

</para>

@data: 
@Returns: 


<!-- ##### FUNCTION gst_data_free ##### -->
<para>

</para>

@data: 


<!-- ##### FUNCTION gst_data_ref ##### -->
<para>

</para>

@data: 
@Returns: 


<!-- ##### FUNCTION gst_data_ref_by_count ##### -->
<para>

</para>

@data: 
@count: 
@Returns: 


<!-- ##### FUNCTION gst_data_unref ##### -->
<para>

</para>

@data: