Chromagram.h

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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
/*
    Constant-Q library
    Copyright (c) 2013-2015 Queen Mary, University of London

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*/

#ifndef CQCHROMAGRAM_H
#define CQCHROMAGRAM_H

#include "CQBase.h"
#include "CQParameters.h"

class CQSpectrogram;

class Chromagram
{
public:
    struct Parameters {
    Parameters(double sr) :
        sampleRate(sr),
        lowestOctave(0),
        octaveCount(7),
        binsPerOctave(36),
        tuningFrequency(440.),
            q(1.0),                    // Q scaling factor
            atomHopFactor(0.25),       // hop size of shortest temporal atom
            threshold(0.0005),         // sparsity threshold for resulting kernel
            window(CQParameters::SqrtBlackmanHarris) // window shape
        { }

    double sampleRate;

    int lowestOctave;

    int octaveCount;

    int binsPerOctave;

    double tuningFrequency;

        double q;
        
        double atomHopFactor;
        
        double threshold;

        CQParameters::WindowType window;
    };

    Chromagram(Parameters params);
    virtual ~Chromagram();

    CQBase::RealBlock process(const CQBase::RealSequence &);
    CQBase::RealBlock getRemainingOutput();

    double getMinFrequency() const { return m_minFrequency; }
    double getMaxFrequency() const { return m_maxFrequency; }

    std::string getBinName(int bin) const;
    
    bool isValid() const;
    int getColumnHop() const;
    int getLatency() const;
    
private:
    Parameters m_params;
    CQSpectrogram *m_cq;
    double m_minFrequency;
    double m_maxFrequency;
    CQBase::RealBlock convert(const CQBase::RealBlock &);
};

#endif