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pcm_utils: use the custom PRNG for volume dithering

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Don't use libc's rand() function, because it is slow.  Our own trivial
linear congruential generator is good enough for dithering.
This commit is contained in:
Max Kellermann
2009-01-03 14:51:47 +01:00
parent 8ebb3196a8
commit 962f2407d2
4 changed files with 40 additions and 6 deletions
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6
src/pcm_dither.c
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@@ -17,11 +17,7 @@
*/
#include "pcm_dither.h"
static unsigned long prng(unsigned long state)
{
return (state * 0x0019660dL + 0x3c6ef35fL) & 0xffffffffL;
}
#include "pcm_prng.h"
static int16_t
pcm_dither_sample_24_to_16(int32_t sample, struct pcm_dither_24 *dither)