[FFmpeg-devel] [PATCH] Use signed version when putting and clamping pixels in VC-1

Christophe GISQUET christophe.gisquet
Sat Nov 17 12:37:21 CET 2007

Kostya a ?crit :
>>> I frames can also benefit for the same optimization, but this seems only
>>> conditional (probably needing adapting more deeply other functions).
>>> Therefore I think it would belong to another patch.
> I thought this is called "moving chairs on Titanic", no need optimizing this,
> more benefits can be gained from optimizing MC(what you did) and inverse transform.

This was indeed very low on any priority list I could have about vc-1
optimization. In fact, put_no_rnd_h264_chroma_mc8_c is a simpler and as
effective (around 12% decoding time on my machine) a target as the 8x8 idct.

Best regards,
Christophe GISQUET

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