[Mesa-dev] [PATCH] vl/mpeg12: implement inverse scan/quantization steps

[Andy Furniss]

Ilia Mirkin wrote:
> Signed-off-by: Ilia Mirkin <imirkin at alum.mit.edu>
> ---
>
> These changes make MPEG2 I-frames generate the correct macroblock data (as
> compared to mplayer via xvmc). Other MPEG2 frames are still misparsed, and
> MPEG1 I-frames have some errors (but largely match up).

This messes up mpeg2 vdpau decode for my radeon - VDPAU_DRIVER=softpipe 
is also affected (and then crashes after a few frames - but that's normal).

xvmc is unaffected.

Normally mpeg2 xvmc and vdpau decode look the same - almost right but 
not quite. The same issues are visible with xvmc softpipe, so I don't 
think it's hw.