|  | <title>Codec Interface</title> | 
|  |  | 
|  | <note> | 
|  | <title>Suspended</title> | 
|  |  | 
|  | <para>This interface has been be suspended from the V4L2 API | 
|  | implemented in Linux 2.6 until we have more experience with codec | 
|  | device interfaces.</para> | 
|  | </note> | 
|  |  | 
|  | <para>A V4L2 codec can compress, decompress, transform, or otherwise | 
|  | convert video data from one format into another format, in memory. | 
|  | Applications send data to be converted to the driver through a | 
|  | &func-write; call, and receive the converted data through a | 
|  | &func-read; call. For efficiency a driver may also support streaming | 
|  | I/O.</para> | 
|  |  | 
|  | <para>[to do]</para> | 
|  |  | 
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