[FFmpeg-devel] [PATCH] optimized H.261 probe function

[Reimar Döffinger]

On Sun, Feb 14, 2010 at 07:37:13PM +0100, Michael Niedermayer wrote:
> > Index: libavformat/raw.c
> > ===================================================================
> > --- libavformat/raw.c	(revision 21819)
> > +++ libavformat/raw.c	(working copy)
> > @@ -497,6 +497,10 @@
> >      init_get_bits(&gb, p->buf, p->buf_size*8);
> >  
> >      for(i=0; i<p->buf_size*8; i++){
> > +        if ((code & 0x01ff0000) || !(code & 0xff00)) {
> > +            code = (code<<8) + get_bits(&gb, 8);
> > +            i += 7;
> > +        } else
> >          code = (code<<1) + get_bits1(&gb);
> >          if ((code & 0xffff0000) == 0x10000) {
> >              int gn= (code>>12)&0xf;
> 
> ok

Applied. Now it's again below the dynamic loader in CPU usage :-)