david/librubberband
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Tidy

Browse Source
This commit is contained in:
Chris Cannam
2022-06-06 14:49:01 +01:00
parent c728a650e9
commit 9a7a977fa0
2 changed files with 13 additions and 34 deletions
Download Patch File Download Diff File Expand all files Collapse all files

34
src/finer/R3StretcherImpl.cpp
View File

@@ -674,7 +674,7 @@ R3StretcherImpl::analyseFormant()
m_scaleData.at(classify)->fft.forward
(f.cepstra.data(), f.envelope.data(),
f.shifted.data()); // shifted is just a spare for this one
f.spare.data()); // shifted is just a spare for this one
v_exp(f.envelope.data(), binCount);
v_square(f.envelope.data(), binCount);
@@ -682,24 +682,6 @@ R3StretcherImpl::analyseFormant()
for (int i = 0; i < binCount; ++i) {
if (f.envelope[i] > 1.0e10) f.envelope[i] = 1.0e10;
}
//!!!
double scale = m_pitchScale;
for (int target = 0; target < binCount; ++target) {
int source = int(round(target * scale));
if (source >= binCount) {
f.shifted[target] = 0.0;
} else {
f.shifted[target] = f.envelope[source];
}
}
// std::cout << "X:";
// for (int i = 0; i < binCount; ++i) {
// if (i > 0) std::cout << ",";
// std::cout << f.shifted[i];
// }
// std::cout << std::endl;
}
void
@@ -718,14 +700,6 @@ R3StretcherImpl::synthesiseChannel(int c, int outhop)
v_copy(scale->prevMag.data(),
scale->mag.data(),
bufSize);
// if (m_formant->enabled) {
// formant shift only the middle register
// if (it.first == m_guideConfiguration.classificationFftSize) {
// v_divide(scale->mag.data(), m_formant->envelope.data(), bufSize);
// v_multiply(scale->mag.data(), m_formant->shifted.data(), bufSize);
// }
// }
}
for (const auto &band : cd->guidance.fftBands) {
@@ -764,13 +738,15 @@ R3StretcherImpl::synthesiseChannel(int c, int outhop)
if (m_formant->enabled) {
double targetFactor = double(m_formant->fftSize) / double(fftSize);
double sourceFactor = targetFactor * m_pitchScale;
double maxRatio = 60.0;
double minRatio = 1.0 / maxRatio;
for (int i = lowBin; i < highBin && i < formantHigh; ++i) {
double source = m_formant->envelopeAt(i * sourceFactor);
double target = m_formant->envelopeAt(i * targetFactor);
if (target > 0.0) {
double ratio = source / target;
// if (ratio < 0.2) ratio = 0.2;
// if (ratio > 5.0) ratio = 5.0;
if (ratio < minRatio) ratio = minRatio;
if (ratio > maxRatio) ratio = maxRatio;
scale->mag[i] *= ratio;
}
}

13
src/finer/R3StretcherImpl.h
View File

@@ -226,19 +226,22 @@ protected:
int fftSize;
FixedVector<double> cepstra;
FixedVector<double> envelope;
FixedVector<double> shifted;
FixedVector<double> spare;
FormantData(int _fftSize) :
enabled(false),
fftSize(_fftSize),
cepstra(_fftSize, 0.0),
envelope(_fftSize, 0.0),
shifted(_fftSize, 0.0) { }
envelope(_fftSize/2 + 1, 0.0),
spare(_fftSize/2 + 1, 0.0) { }
double envelopeAt(double bin) const {
int b0 = int(floor(bin)), b1 = int(ceil(bin));
if (b1 == b0) return envelope.at(b0);
else {
if (b0 < 0 || b0 > fftSize/2) {
return 0.0;
} else if (b1 == b0 || b1 > fftSize/2) {
return envelope.at(b0);
} else {
double diff = bin - double(b0);
return envelope.at(b0) * (1.0 - diff) + envelope.at(b1) * diff;
}