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VP8: faster filter_level clip 

(cherry picked from commit a1b227bb53)
This commit is contained in:
Jason Garrett-Glaser 2011-02-03 19:44:32 -08:00 committed by Michael Niedermayer
parent 8cde1b7997
commit c54ac7a8f2
1 changed files with 4 additions and 1 deletions
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5
libavcodec/vp8.c
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@ -1480,7 +1480,10 @@ static av_always_inline void filter_level_for_mb(VP8Context *s, VP8Macroblock *m
filter_level += s->lf_delta.ref[mb->ref_frame];
filter_level += s->lf_delta.mode[mb->mode];
}
filter_level = av_clip(filter_level, 0, 63);
/* Like av_clip for inputs 0 and max, where max is equal to (2^n-1) */
#define POW2CLIP(x,max) (((x) & ~max) ? (-(x))>>31 & max : (x));
filter_level = POW2CLIP(filter_level, 63);
interior_limit = filter_level;
if (s->filter.sharpness) {