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Go back to running formants only within the necessary range

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This commit is contained in:
Chris Cannam
2022-06-06 17:06:52 +01:00
parent 4fb7b0ad47
commit 100a7c0ba6
1 changed files with 14 additions and 8 deletions
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22
src/finer/R3StretcherImpl.cpp
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@@ -682,30 +682,36 @@ R3StretcherImpl::adjustFormant(int c)
int fftSize = it.first;
auto &scale = it.second;
int formantHigh = int(floor(fftSize * 10000.0 / m_parameters.sampleRate));
/*
int lowBin = int(floor(fftSize * band.f0 / m_parameters.sampleRate));
int highBin = int(floor(fftSize * band.f1 / m_parameters.sampleRate));
if (highBin % 2 == 1) --highBin;
int formantHigh = int(floor(fftSize * 10000.0 / m_parameters.sampleRate));
for (int i = 0; i < lowBin; ++i) {
scale->mag[i] = 0.0;
}
*/
double targetFactor = double(cd->formant->fftSize) / double(fftSize);
double sourceFactor = targetFactor * m_pitchScale;
for (const auto &b : m_guideConfiguration.fftBandLimits) {
if (b.fftSize == fftSize) {
// double maxRatio = 60.0;
// double minRatio = 1.0 / maxRatio;
// for (int i = lowBin; i < highBin && i < formantHigh; ++i) {
for (int i = 0; i < scale->bufSize; ++i) {
double source = cd->formant->envelopeAt(i * sourceFactor);
double target = cd->formant->envelopeAt(i * targetFactor);
if (target > 0.0) {
double ratio = source / target;
for (int i = b.b0min; i < b.b1max && i < formantHigh; ++i) {
double source = cd->formant->envelopeAt(i * sourceFactor);
double target = cd->formant->envelopeAt(i * targetFactor);
if (target > 0.0) {
double ratio = source / target;
// if (ratio < minRatio) ratio = minRatio;
// if (ratio > maxRatio) ratio = maxRatio;
scale->mag[i] *= ratio;
scale->mag[i] *= ratio;
}
}
}
}
}