diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2011-05-11 20:41:19 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-05-11 20:41:19 +0200 |
| commit | a18eff49c03622c628913d0199dfa61e5c29f0d6 (patch) | |
| tree | 7d900c71ce6418ad9972305e630f5ee636de9a7f /libavutil | |
| parent | de545d2491c5d0013b16fec71696ab93e9997461 (diff) | |
av_compare_ts: Improve speed when calculations fit in 64bit.
about 110 cpu cycles before 60 cpu cycles afterwards.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/mathematics.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavutil/mathematics.c b/libavutil/mathematics.c index c6851cb755..cfe8fbc9eb 100644 --- a/libavutil/mathematics.c +++ b/libavutil/mathematics.c @@ -27,6 +27,7 @@ #include <stdint.h> #include <limits.h> #include "mathematics.h" +#include "libavutil/common.h" const uint8_t ff_sqrt_tab[256]={ 0, 16, 23, 28, 32, 36, 40, 43, 46, 48, 51, 54, 56, 58, 60, 62, 64, 66, 68, 70, 72, 74, 76, 77, 79, 80, 82, 84, 85, 87, 88, 90, @@ -139,6 +140,8 @@ int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq){ int av_compare_ts(int64_t ts_a, AVRational tb_a, int64_t ts_b, AVRational tb_b){ int64_t a= tb_a.num * (int64_t)tb_b.den; int64_t b= tb_b.num * (int64_t)tb_a.den; + if((FFABS(ts_a)|a|FFABS(ts_b)|b)<=INT_MAX) + return (ts_a*a > ts_b*b) - (ts_a*a < ts_b*b); if (av_rescale_rnd(ts_a, a, b, AV_ROUND_DOWN) < ts_b) return -1; if (av_rescale_rnd(ts_b, b, a, AV_ROUND_DOWN) < ts_a) return 1; return 0; |