[Ffmpeg-devel] [PATCH] Some MMX optimizations for Chinese AVS

[Stefan Gehrer]

Michael Niedermayer wrote:
> 
> On Fri, Jul 28, 2006 at 07:57:41PM +0200, Stefan Gehrer wrote:
> [...]
> 
> > @@ -2779,6 +2795,8 @@
> >                      c->idct_permutation_type= FF_PARTTRANS_IDCT_PERM;
> >                  }
> >  #endif
> > +            }else if(idct_algo==FF_IDCT_H264){
> > +                    c->idct_permutation_type= FF_TRANSPOSE_IDCT_PERM;
> 
> cavs idct != h.264 idct IIRC
> 

Right, it is just that both transforms need the same permutation
(unpermuted in C, simple transpose in MMX). But the H.264 code does
not even use this way of setting the permutation, I don't know how it
does it. So probably introducing a value of idct_algo FF_IDCT_CAVS
is cleaner.

Regards
Stefan Gehrer
-- 


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