diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2010-06-09 17:27:42 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2010-06-09 17:27:42 +0000 |
| commit | 65db0587a8f3233afa67e870aac38c494314ebeb (patch) | |
| tree | 937511ddce80d73e8c31b6cf91a0bf35255abcbb /libavutil/mathematics.c | |
| parent | 130b096aea6e91cff4b608f9ef61e9c96e3166d1 (diff) | |
Add av_compare_mod()
Originally committed as revision 23551 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/mathematics.c')
| -rw-r--r-- | libavutil/mathematics.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/libavutil/mathematics.c b/libavutil/mathematics.c index c06cb16165..00b81f131e 100644 --- a/libavutil/mathematics.c +++ b/libavutil/mathematics.c @@ -144,6 +144,13 @@ int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b){ return 0; } +int64_t av_compare_mod(uint64_t a, uint64_t b, uint64_t mod){ + int64_t c= (a-b) & (mod-1); + if(c > (mod>>1)) + c-= mod; + return c; +} + #ifdef TEST #include "integer.h" #undef printf |