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/**********************************************************************
Audacity: A Digital Audio Editor
SpectrumAnalyst.h
Dominic Mazzoni
Paul Licameli split from FreqWindow.h
**********************************************************************/
#pragma once
#include <vector>
#include <functional>
class FFT_API SpectrumAnalyst
{
public:
enum Algorithm {
Spectrum,
Autocorrelation,
CubeRootAutocorrelation,
EnhancedAutocorrelation,
Cepstrum,
NumAlgorithms
};
using ProgressFn = std::function<void(long long num, long long den)>;
SpectrumAnalyst();
~SpectrumAnalyst();
// Return true iff successful
bool Calculate(Algorithm alg,
int windowFunc, // see FFT.h for values
size_t windowSize, double rate,
const float *data, size_t dataLen,
float *pYMin = NULL, float *pYMax = NULL, // outputs
ProgressFn progress = NULL);
const float *GetProcessed() const;
int GetProcessedSize() const;
float GetProcessedValue(float freq0, float freq1) const;
float FindPeak(float xPos, float *pY) const;
private:
float CubicInterpolate(float y0, float y1, float y2, float y3, float x) const;
float CubicMaximize(float y0, float y1, float y2, float y3, float * max) const;
private:
Algorithm mAlg;
double mRate;
size_t mWindowSize;
std::vector<float> mProcessed;
};
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