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

Kostya kostya.shishkov
Thu Nov 15 08:24:10 CET 2007

On Wed, Nov 14, 2007 at 09:25:10PM +0100, Christophe GISQUET wrote:
> Christophe GISQUET a ?crit :
> > trivial patch for P and B frames cases, roughly 2% speed-up (with the MC
> > patch applied, otherwise it'd have been less impressive :)
> > 
> > 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.
> And I still manage to screw that up: first hunk is rather useless.
> Updated patch attached...

> Best regards,
> -- 
> Christophe GISQUET

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