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| author | Loren Merritt <lorenm@u.washington.edu> | 2009-12-04 15:12:09 +0000 |
|---|---|---|
| committer | Loren Merritt <lorenm@u.washington.edu> | 2009-12-04 15:12:09 +0000 |
| commit | d09f65c7ec0339bcf3b1a3c579e42a8133740bbd (patch) | |
| tree | 2f64de25e63aae58bd8e6bcda9c0f616d8c028a1 /libavcodec/apedec.c | |
| parent | 84a29dc10a9b51a20ea628480df61b43c2b655f8 (diff) | |
| download | ffmpeg-d09f65c7ec0339bcf3b1a3c579e42a8133740bbd.tar.gz | |
1-13% faster apply_filter, 1-3% faster ape decoding on core2
Originally committed as revision 20729 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/apedec.c')
| -rw-r--r-- | libavcodec/apedec.c | 11 |
1 files changed, 3 insertions, 8 deletions
diff --git a/libavcodec/apedec.c b/libavcodec/apedec.c index 3a0d172c9e..b8d1e9e254 100644 --- a/libavcodec/apedec.c +++ b/libavcodec/apedec.c @@ -678,14 +678,9 @@ static inline void do_apply_filter(APEContext * ctx, int version, APEFilter *f, /* Version 3.98 and later files */ /* Update the adaption coefficients */ - absres = (res < 0 ? -res : res); - - if (absres > (f->avg * 3)) - *f->adaptcoeffs = ((res >> 25) & 64) - 32; - else if (absres > (f->avg * 4) / 3) - *f->adaptcoeffs = ((res >> 26) & 32) - 16; - else if (absres > 0) - *f->adaptcoeffs = ((res >> 27) & 16) - 8; + absres = FFABS(res); + if (absres) + *f->adaptcoeffs = ((res & (1<<31)) - (1<<30)) >> (25 + (absres <= f->avg*3) + (absres <= f->avg*4/3)); else *f->adaptcoeffs = 0; |