[linux-dvb] Wide Screen Signalling (WSS)

Oliver Endriss o.endriss at gmx.de
Wed Jan 4 07:57:03 CET 2006


Oliver Endriss wrote:
> I need an interface to pass WSS data from userspace to the av7110
> driver[1]. In videodev2.h there are some definitions but the comment
> does not sound very promising:
> 
> | /* Sliced VBI
> |  *
> |  *    This implements is a proposal V4L2 API to allow SLICED VBI
> |  * required for some hardware encoders. It should change without
> |  * notice in the definitive implementation.
> |  */
> 
> And , according to the V4L2 API spec rev 0.8,
> 'This interface is not yet implemented in v4l2'.
> 
> I wonder whether I should invent an av7110-specific ioctl or use this
> interface. Any comments?

Hans Verkuil wrote:
> Use this interface. The next V4L2 API spec will contain the updated 
> documentation. I'll mail you the specs off-list. See the saa7127.c 
> module for an example on how this interface is used.

Ok, here we go. Patch for the saa7146/av7110 driver:
http://www.escape-edv.de/endriss/dvb/v4l-dvb-wss-v2.diff
I hope that I implemented the API correctly. ;-)

This is a small tool which I wrote for testing:
http://www.escape-edv.de/endriss/dvb/wsstest.c

Oliver

-- 
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VDR Remote Plugin available at
http://www.escape-edv.de/endriss/vdr/
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