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audioconvert: add triangular dither

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This commit is contained in:
Wim Taymans 2022-07-11 16:28:51 +02:00
parent 9a5a71dda9
commit 277addcca6
2 changed files with 20 additions and 3 deletions
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9
spa/plugins/audioconvert/fmt-ops-c.c
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@ -236,8 +236,13 @@ static inline void update_dither_c(struct convert *conv, uint32_t n_samples)
float *dither = conv->dither, scale = conv->scale;
uint32_t *state = &conv->random[0];
for (n = 0; n < n_samples; n++)
dither[n] = lcnoise(state) * scale;
if (conv->method < DITHER_METHOD_TRIANGULAR) {
for (n = 0; n < n_samples; n++)
dither[n] = lcnoise(state) * scale;
} else {
for (n = 0; n < n_samples; n++)
dither[n] = (lcnoise(state) + lcnoise(state)) * scale;
}
}
#define MAKE_D_dither(dname,dtype,func) \