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| author | Michael Niedermayer <michaelni@gmx.at> | 2003-01-27 20:39:29 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2003-01-27 20:39:29 +0000 |
| commit | c81f034988f173a5cc0cf75c3384652fe7fe73bd (patch) | |
| tree | 33e59f093f9527a560742046f2fdbd396e3c81b5 /libavcodec/common.c | |
| parent | 425ed6e223b8dd190e9fbeb4a41c6479f3fc8df0 (diff) | |
| download | ffmpeg-c81f034988f173a5cc0cf75c3384652fe7fe73bd.tar.gz | |
optimizing av_log2
Originally committed as revision 1515 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/common.c')
| -rw-r--r-- | libavcodec/common.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/libavcodec/common.c b/libavcodec/common.c index 4868bc0237..aa766280b3 100644 --- a/libavcodec/common.c +++ b/libavcodec/common.c @@ -27,6 +27,17 @@ const UINT8 ff_sqrt_tab[128]={ 9, 9, 9, 9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11 }; +const uint8_t ff_log2_tab[256]={ + 0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4, + 5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5, + 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, + 6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7 +}; + void init_put_bits(PutBitContext *s, UINT8 *buffer, int buffer_size, void *opaque, |