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| author | Jason Garrett-Glaser <jason@x264.com> | 2011-02-03 19:44:32 -0800 |
|---|---|---|
| committer | Jason Garrett-Glaser <jason@x264.com> | 2011-02-03 19:55:06 -0800 |
| commit | a1b227bb533f173354795124e0b966277c251b56 (patch) | |
| tree | d0cdf7bd7d6ed0243ba029e0a1ecc1cb96b55f5e | |
| parent | dd18c9a050ac1f1437151ceb2d2afbc96c5602d8 (diff) | |
| download | ffmpeg-a1b227bb533f173354795124e0b966277c251b56.tar.gz | |
VP8: faster filter_level clip
| -rw-r--r-- | libavcodec/vp8.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c index bcf623790c..1db57e49ac 100644 --- a/libavcodec/vp8.c +++ b/libavcodec/vp8.c @@ -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) { |