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Deprecate the Mersenne Twister.

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Please use an ALFG, MLFG, LCG or KISS99 generator, MLFG&KISS99 provide higher quality
numbers and all should be faster.

Originally committed as revision 17874 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-03-08 14:46:10 +00:00
parent c957c85426
commit 52a6632a2b
1 changed files with 4 additions and 4 deletions
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8
libavutil/random.h
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@ -38,8 +38,8 @@ typedef struct {
#if LIBAVUTIL_VERSION_MAJOR < 50
attribute_deprecated void av_init_random(unsigned int seed, AVRandomState *state);
#endif
void av_random_init(AVRandomState *state, unsigned int seed); ///< To be inlined, the struct must be visible. So it does not make sense to try and keep it opaque with malloc/free-like calls.
void av_random_generate_untempered_numbers(AVRandomState *state); ///< Regenerate the untempered numbers (must be done every 624 iterations, or it will loop).
attribute_deprecated void av_random_init(AVRandomState *state, unsigned int seed); ///< To be inlined, the struct must be visible. So it does not make sense to try and keep it opaque with malloc/free-like calls.
attribute_deprecated void av_random_generate_untempered_numbers(AVRandomState *state); ///< Regenerate the untempered numbers (must be done every 624 iterations, or it will loop).
/**
* Generates a random number from the interval [0,0xffffffff].
@ -49,7 +49,7 @@ void av_random_generate_untempered_numbers(AVRandomState *state); ///< Regenerat
* If you still choose to use MT, expect that you will have to provide
* some evidence that it makes a difference for the case where you use it.
*/
static inline unsigned int av_random(AVRandomState *state)
attribute_deprecated static inline unsigned int av_random(AVRandomState *state)
{
unsigned int y;
@ -70,7 +70,7 @@ static inline unsigned int av_random(AVRandomState *state)
}
/** Returns a random number in the range [0-1] as double. */
static inline double av_random_real1(AVRandomState *state)
attribute_deprecated static inline double av_random_real1(AVRandomState *state)
{
/* divided by 2^32-1 */
return av_random(state) * (1.0 / 4294967296.0);