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Bug fixes to noise generation.

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This commit is contained in:
David Reid
2020-02-22 13:01:35 +10:00
parent ccba7ef6a9
commit 187e8b2e5d
1 changed files with 10 additions and 6 deletions
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miniaudio.h
+10 -6
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@@ -6013,6 +6013,11 @@ static MA_INLINE ma_uint32 ma_lcg_rand_u32(ma_lcg* pLCG)
return (ma_uint32)ma_lcg_rand_s32(pLCG);
}
static MA_INLINE ma_int16 ma_lcg_rand_s16(ma_lcg* pLCG)
{
return (ma_int16)(ma_lcg_rand_s32(pLCG) & 0xFFFF);
}
static MA_INLINE double ma_lcg_rand_f64(ma_lcg* pLCG)
{
return ma_lcg_rand_s32(pLCG) / (double)0x7FFFFFFF;
@@ -38570,8 +38575,7 @@ static MA_INLINE float ma_noise_f32_white(ma_noise* pNoise)
static MA_INLINE ma_int16 ma_noise_s16_white(ma_noise* pNoise)
{
ma_int64 s = (ma_int64)(ma_lcg_rand_s32(&pNoise->lcg) * pNoise->config.amplitude);
return (ma_int16)s;
return (ma_int16)(ma_noise_f32_white(pNoise) * 32767.0f);
}
static MA_INLINE ma_uint64 ma_noise_read_pcm_frames__white(ma_noise* pNoise, void* pFramesOut, ma_uint64 frameCount)
@@ -38585,13 +38589,13 @@ static MA_INLINE ma_uint64 ma_noise_read_pcm_frames__white(ma_noise* pNoise, voi
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
float s = ma_noise_f32_white(pNoise);
for (iChannel = 0; iChannel < pNoise->config.channels; iChannel += 1) {
pFramesOutF32[iFrame] = s;
pFramesOutF32[iFrame*pNoise->config.channels + iChannel] = s;
}
}
} else {
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
for (iChannel = 0; iChannel < pNoise->config.channels; iChannel += 1) {
pFramesOutF32[iFrame] = ma_noise_f32_white(pNoise);
pFramesOutF32[iFrame*pNoise->config.channels + iChannel] = ma_noise_f32_white(pNoise);
}
}
}
@@ -38601,13 +38605,13 @@ static MA_INLINE ma_uint64 ma_noise_read_pcm_frames__white(ma_noise* pNoise, voi
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
ma_int16 s = ma_noise_s16_white(pNoise);
for (iChannel = 0; iChannel < pNoise->config.channels; iChannel += 1) {
pFramesOutS16[iFrame] = s;
pFramesOutS16[iFrame*pNoise->config.channels + iChannel] = s;
}
}
} else {
for (iFrame = 0; iFrame < frameCount; iFrame += 1) {
for (iChannel = 0; iChannel < pNoise->config.channels; iChannel += 1) {
pFramesOutS16[iFrame] = ma_noise_s16_white(pNoise);
pFramesOutS16[iFrame*pNoise->config.channels + iChannel] = ma_noise_s16_white(pNoise);
}
}
}