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| author | Aurelien Jacobs <aurel@gnuage.org> | 2008-08-13 10:04:59 +0000 |
|---|---|---|
| committer | Aurelien Jacobs <aurel@gnuage.org> | 2008-08-13 10:04:59 +0000 |
| commit | d1a12956a0196a1745c121e586befdc311bf8a89 (patch) | |
| tree | 11aa9e79fa2d81d0fe9525016348523f5a0949c0 /libavutil | |
| parent | 29d3ed3be648f07f14eedade868c9318fd63bc3f (diff) | |
| download | ffmpeg-d1a12956a0196a1745c121e586befdc311bf8a89.tar.gz | |
define some math constants so as not to depend on _XOPEN_SOURCE
Originally committed as revision 14725 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil')
| -rw-r--r-- | libavutil/mathematics.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/libavutil/mathematics.h b/libavutil/mathematics.h index a9dfe7eccf..244baca020 100644 --- a/libavutil/mathematics.h +++ b/libavutil/mathematics.h @@ -22,8 +22,22 @@ #define FFMPEG_MATHEMATICS_H #include <stdint.h> +#include <math.h> #include "rational.h" +#ifndef M_E +#define M_E 2.7182818284590452354 /* e */ +#endif +#ifndef M_LN2 +#define M_LN2 0.69314718055994530942 /* log_e 2 */ +#endif +#ifndef M_LN10 +#define M_LN10 2.30258509299404568402 /* log_e 10 */ +#endif +#ifndef M_SQRT1_2 +#define M_SQRT1_2 0.70710678118654752440 /* 1/sqrt(2) */ +#endif + enum AVRounding { AV_ROUND_ZERO = 0, ///< round toward zero AV_ROUND_INF = 1, ///< round away from zero |