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Prevent freezing on PSP when turning on soft clip #171

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Prevent freezing on PSP when turning on soft clip #171

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48 changes: 24 additions & 24 deletions sources/Services/Audio/AudioOutDriver.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -95,8 +95,8 @@ fixed AudioOutDriver::softClip(fixed sample) {
if (softclip_ == 0 || sample == 0) return sample;

float sampleFloat=fp2fl(sample);
fixed maxPositiveFloat=fp2fl(maxPositiveFixed_);
fixed maxNegativeFloat=fp2fl(maxNegativeFixed_);
float maxPositiveFloat = fp2fl(maxPositiveFixed_);
float maxNegativeFloat=fp2fl(maxNegativeFixed_);
float maxFloat;

if (sampleFloat>0) {
Expand All @@ -112,36 +112,36 @@ fixed AudioOutDriver::softClip(fixed sample) {
switch (softclip_) {
case 1:
default:
alpha=1.45; // -1.5db (approx.)
break;
alpha = 1.45f; // -1.5db (approx.)
break;
case 2:
alpha=1.07; // -3db (approx.)
break;
alpha = 1.07f; // -3db (approx.)
break;
case 3:
alpha=0.75; // -6db (approx.)
break;
alpha = 0.75f; // -6db (approx.)
break;
case 4:
alpha=0.53; // -9db (approx.)
alpha = 0.53f; // -9db (approx.)
break;
}

float twoThirds=2.0/3.0;
float alphaTwoThirds=alpha*twoThirds;
float invertedAlpha=1.0/alpha;
float twoThirds = 2.0f / 3.0f;
float alphaTwoThirds=alpha*twoThirds;
float invertedAlpha = 1.0f / alpha;

x=invertedAlpha*(sampleFloat/maxFloat);
if (x>-1.0 && x<1.0) {
sampleFloat=maxFloat*(alpha*(x-(pow(x, 3)/3.0)));
} else {
sampleFloat=maxFloat*alphaTwoThirds;
}
x = invertedAlpha * (sampleFloat / maxFloat);
if (x > -1.0f && x < 1.0f) {
sampleFloat=maxFloat*(alpha*(x-(pow(x, 3.0f)/3.0f)));
} else {
sampleFloat=maxFloat*alphaTwoThirds;
}

float gainCompensation;
if (alpha > 1.0) {
gainCompensation=1.0/(alpha*(invertedAlpha-pow(invertedAlpha, 3)/3.0));
} else {
gainCompensation=1.0/alphaTwoThirds;
}
float gainCompensation;
if (alpha > 1.0f) {
gainCompensation=1.0f/(alpha*(invertedAlpha-pow(invertedAlpha, 3.0f)/3.0f));
} else {
gainCompensation = 1.0f / alphaTwoThirds;
}
float damp = (float)attenuation_ / 100;
return fl2fp(sampleFloat*gainCompensation*damp);
}
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