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| author | Michael Niedermayer <michaelni@gmx.at> | 2008-07-28 15:47:06 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2008-07-28 15:47:06 +0000 |
| commit | 2cf3c8632cb8d2819942f45aefd1cb5faa014da0 (patch) | |
| tree | e99f6b8c52fcaa073fb047f2f13d0e126e7a3439 /libavutil/lfg.h | |
| parent | e80d47411902929c3acecb7c2e3a8116095f4c70 (diff) | |
| download | ffmpeg-2cf3c8632cb8d2819942f45aefd1cb5faa014da0.tar.gz | |
Document av_lfg_get().
Originally committed as revision 14461 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavutil/lfg.h')
| -rw-r--r-- | libavutil/lfg.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/libavutil/lfg.h b/libavutil/lfg.h index 0882faab02..36c36f446b 100644 --- a/libavutil/lfg.h +++ b/libavutil/lfg.h @@ -29,6 +29,12 @@ typedef struct { void av_lfg_init(AVLFG *c, unsigned int seed); +/** + * Gets the next random unsigned 32bit number. + * + * Please also consider a simple LCG like state= state*1664525+1013904223, + * it may be good enough and faster for your specific use case. + */ static inline unsigned int av_lfg_get(AVLFG *c){ c->state[c->index & 63] = c->state[(c->index-24) & 63] + c->state[(c->index-55) & 63]; return c->state[c->index++ & 63]; |