[Libva] deinterlacing on GM45

[Xiang, Haihao]

GM45 doesn't support deinterlacing

Regards
Haihao

> Hi all,
> 
> playing around with libva we found  that deinterlacing a TV stream seems not to work on a Intel GM45 
> chip.
> 
> We are using the latest intel drivers from the g45-h264 branch on 
> git.freedesktop.org/git/vaapi/intel-driver.git. Testing both on a Nvidia chip and an Intel GM45 with 
> mplayer + vaapi-patches and modified gstreamer-vaapi plugins (see attached quick'n'dirty fix) we found:
> 
> mplayer-withVaapi -vo vaapi:deint=2 -va vaapi ...
>      ... OK on nvidia (deinterlaced images)
>      ... NOT OK on Intel
> 
> modified gstreamer-vaapi
>      ... OK on nvidia
>      ... NOT OK on Intel
> 
> Did we miss something in our setup? Or maybe a known restriction for intel drivers?
> 
> Regarding the gstreamer-vaapi modification: It is based on what was said in the following thread
> http://lists.freedesktop.org/archives/libva/2010-July/000338.html
> Might be a feature to be integrated in the vaapi-plugins. Could define another property in vaapisink 
> (like deint={true, false}) allowing to enforce putSurface flags set to VA_FRAME_PICTURE vs. 
> VA_TOP_FIELD+VA_BOTTOM_FIELD. What do you think, Gwenole?
> 
> Thanks,
>     Holger