allanger/paulxstretch
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Allow FFT object to be constructed without inverse FFT. Added SpectralVisualizer component that does an extremely inefficient visualization of the spectral processing stages.

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This commit is contained in:
xenakios
2017-12-03 22:00:40 +02:00
parent a1f7c52eb0
commit 16868d5ccd
4 changed files with 82 additions and 7 deletions
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64
Source/PluginEditor.cpp
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@ -42,7 +42,7 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor (Pa
addAndMakeVisible(&m_rec_enable);
m_rec_enable.setButtonText("Capture");
attachCallback(m_rec_enable, [this]() { processor.setRecordingEnabled(m_rec_enable.getToggleState()); });
addAndMakeVisible(&m_specvis);
setSize (700, 30+pars.size()*25+200);
m_wavecomponent.TimeSelectionChangedCallback = [this](Range<double> range, int which)
{
@ -56,6 +56,7 @@ PaulstretchpluginAudioProcessorEditor::PaulstretchpluginAudioProcessorEditor (Pa
m_wavecomponent.ShowFileCacheRange = true;
startTimer(1, 100);
startTimer(2, 1000);
startTimer(3, 500);
m_wavecomponent.startTimer(100);
}
@ -82,7 +83,8 @@ void PaulstretchpluginAudioProcessorEditor::resized()
m_parcomps[i]->setBounds(1, 30 + i * 25, getWidth()-2, 24);
}
int yoffs = m_parcomps.back()->getBottom() + 1;
m_wavecomponent.setBounds(1, yoffs, getWidth()-2, getHeight()-1-yoffs);
//m_wavecomponent.setBounds(1, yoffs, getWidth()-2, getHeight()-1-yoffs);
m_specvis.setBounds(1, yoffs, getWidth() - 2, getHeight() - 1 - yoffs);
}
void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
@ -108,6 +110,12 @@ void PaulstretchpluginAudioProcessorEditor::timerCallback(int id)
m_wavecomponent.setAudioFile(processor.getAudioFile());
}
m_wavecomponent.setTimeSelection(processor.getTimeSelection());
}
if (id == 3)
{
m_specvis.setState(processor.getStretchSource()->getProcessParameters(), processor.getStretchSource()->getFFTSize() / 2,
processor.getSampleRate());
}
}
@ -431,3 +439,55 @@ int WaveformComponent::getTimeSelectionEdge(int x, int y)
return 0;
}
SpectralVisualizer::SpectralVisualizer()
{
m_img = Image(Image::RGB, 500, 200, true);
}
void SpectralVisualizer::setState(ProcessParameters & pars, int nfreqs, double samplerate)
{
m_img = Image(Image::RGB, getWidth(), getHeight(), true);
std::vector<REALTYPE> insamples(nfreqs*2);
std::vector<REALTYPE> freqs1(nfreqs*2);
std::vector<REALTYPE> freqs2(nfreqs*2);
std::vector<REALTYPE> freqs3(nfreqs*2);
double hz = 440.0;
int numharmonics = 40;
double scaler = 1.0 / numharmonics;
for (int i = 0; i < nfreqs; ++i)
{
for (int j = 0; j < numharmonics; ++j)
{
double oscgain = 1.0 - (1.0 / numharmonics)*j;
insamples[i] += scaler * oscgain * sin(2 * 3.141592653 / samplerate * i* (hz+hz*j));
}
}
FFT fft(nfreqs*2);
for (int i = 0; i < nfreqs; ++i)
{
fft.smp[i] = insamples[i];
}
fft.applywindow(W_HAMMING);
fft.smp2freq();
double ratio = pow(2.0f, pars.pitch_shift.cents / 1200.0f);
spectrum_do_pitch_shift(pars, nfreqs, fft.freq.data(), freqs2.data(), ratio);
spectrum_do_freq_shift(pars, nfreqs, samplerate, freqs2.data(), freqs1.data());
spectrum_do_compressor(pars, nfreqs, freqs1.data(), freqs2.data());
spectrum_spread(nfreqs, samplerate, freqs3, freqs2.data(), freqs1.data(), pars.spread.bandwidth);
Graphics g(m_img);
g.setColour(Colours::white);
for (int i = 0; i < nfreqs; ++i)
{
double binfreq = (samplerate / 2 / nfreqs)*i;
double xcor = jmap<double>(binfreq, 0.0, samplerate / 2.0, 0.0, getWidth());
double ycor = getHeight()- jmap<double>(freqs1[i], 0.0, nfreqs/64, 0.0, getHeight());
ycor = jlimit<double>(0.0, getHeight(), ycor);
g.drawLine(xcor, getHeight(), xcor, ycor, 1.0);
}
repaint();
}
void SpectralVisualizer::paint(Graphics & g)
{
g.drawImage(m_img, 0, 0, getWidth(), getHeight(), 0, 0, m_img.getWidth(), m_img.getHeight());
}