[Libva] Opengl surface to VaSurface

[Gwenole Beauchesne]

Hi,

2012/4/24 Oliver Seitz <info at vtnd.de>:

>>> Planned scheme: h.264 stream ->vaapi decoder ->  VaSurface ->  OpenGl
>>> Surface
>>> ->  Opengl postprocessing ->  VaSurface ->  vaapi encoder ->  h.264
>>> stream.
>>
>>
>> There is work in progress for this use case, through EGL extensions.
>
>
> Using this scheme, would this add a possibility to adjust image contrast and
> brightness for VAAPI accelerated playback through OpenGL controls?

If you write the relevant shader code for it, yes. You ultimately get
the Y component in a texture, likewise for the UV components. You just
do whatever you want with them next. And HSBC control is indeed
simpler to perform at the YUV level.

Regards,
Gwenole.