[Libva] H264 BaseLine or Main Profile on VAAPI's VDPAU backend

[Gwenole Beauchesne]

Le 26 août 09 à 18:09, Gwenole Beauchesne a écrit :

> AVFrame.data[3] shall receive the VASurfaceID of a new surface.
>
> For H.264, AVFrame.data[0] shall not be NULL but anything different  
> from eachother AVFrame should fit. e.g. the VASurfaceID too or  
> whatever pointer to private surface data.

I think I need to clarify this one as the suggestion was not fully  
correct: AVFrame.data[0-2] are reserved to YV12 pixels readback but  
this is not implemented yet. And, due to performance reasons, this  
will be an option, should this be ever implemented. While you  
generally can leave this to NULL, this is not the case for H.264 codec  
where it needs this filled in a way that AVFrame1.data[0] !=  
AVFrame2.data[0] != ...  Otherwise, it won't construct RefPicList  
correctly.

So, as a simplification for the time being, you can make  
AVFrame.data[0] = VASurfaceID.

Regards,
Gwenole.