[FFmpeg-devel] [PATCH 2/3] Indeo 5 decoder: common DSP functions

Michael Niedermayer michaelni
Sat Jan 9 15:47:39 CET 2010


On Sat, Jan 09, 2010 at 04:40:30PM +0200, Kostya wrote:
> On Fri, Jan 08, 2010 at 11:41:23PM +0100, Michael Niedermayer wrote:
> > On Sun, Jan 03, 2010 at 12:56:36PM +0200, Kostya wrote:
> > [...]
> > > void ff_ivi_recompose53(const IVIPlaneDesc *plane, uint8_t *dst,
> [function body skipped]
> > 
> > is this mess faster than some more readable variant?
> 
> Here's more readable variant by me, checked to be bitexact but it's
> significantly slower (> 10%), I'd rather leave old one.

I also prefer speed, what about an implementation using lifting?

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

I hate to see young programmers poisoned by the kind of thinking
Ulrich Drepper puts forward since it is simply too narrow -- Roman Shaposhnik
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