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swr-test: simplify prng code

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-04-27 12:23:40 +02:00
parent e5474f5c48
commit dcfc12e86a
1 changed files with 5 additions and 4 deletions
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9
libswresample/swresample_test.c
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@ -145,10 +145,11 @@ static void audiogen(void *data, enum AVSampleFormat sample_fmt,
double tabf1[SWR_CH_MAX];
double tabf2[SWR_CH_MAX];
double taba[SWR_CH_MAX];
unsigned static seed;
unsigned static rnd;
#define PUT_SAMPLE set(data, ch, k, channels, sample_fmt, v);
#define dbl_rand(x) ((seed = seed * 1664525 + 1013904223)*2.0 / (double)UINT_MAX - 1)
#define uint_rand(x) (x = x * 1664525 + 1013904223)
#define dbl_rand(x) (uint_rand(x)*2.0 / (double)UINT_MAX - 1)
k = 0;
/* 1 second of single freq sinus at 1000 Hz */
@ -187,8 +188,8 @@ static void audiogen(void *data, enum AVSampleFormat sample_fmt,
/* 1 second of unrelated ramps for each channel */
for (ch = 0; ch < channels; ch++) {
taba[ch] = 0;
tabf1[ch] = 100 + (seed = seed * 1664525 + 1013904223) % 5000;
tabf2[ch] = 100 + (seed = seed * 1664525 + 1013904223) % 5000;
tabf1[ch] = 100 + uint_rand(rnd) % 5000;
tabf2[ch] = 100 + uint_rand(rnd) % 5000;
}
for (i = 0; i < 1 * sample_rate && k < nb_samples; i++, k++) {
for (ch = 0; ch < channels; ch++) {