view dsp/chromagram/Chromagram.h @ 3:07ac3de1e53b

* Give the chromagram an alternative entry point passing in frequency domain
  data
* Centre the Hamming windows and do an fftshift when calculating sparse kernel

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    QM DSP Library

    Centre for Digital Music, Queen Mary, University of London.
    This file copyright 2005-2006 Christian Landone.
    All rights reserved.
*/

#ifndef CHROMAGRAM_H
#define CHROMAGRAM_H

#include "dsp/transforms/FFT.h"
#include "ConstantQ.h"

struct ChromaConfig{
    unsigned int FS;
    double min;
    double max;
    unsigned int BPO;
    double CQThresh;
    bool isNormalised;
};

class Chromagram 
{

public:	
    Chromagram( ChromaConfig Config );
    ~Chromagram();
	
    double* process( double *data ); // time domain
    double* process( double *real, double *imag ); // frequency domain
    void unityNormalise( double* src );

    // Complex arithmetic
    double kabs( double real, double imag );
	
    // Results
    unsigned int getK() { return m_uK;}
    unsigned int getFrameSize() { return m_frameSize; }
    unsigned int getHopSize()   { return m_hopSize; }

private:
    int initialise( ChromaConfig Config );
    int deInitialise();
	
    double* m_chromadata;
    double m_FMin;
    double m_FMax;
    unsigned int m_BPO;
    unsigned int m_uK;

    bool isNormalised;

    unsigned int m_frameSize;
    unsigned int m_hopSize;

    FFT* m_FFT;
    ConstantQ* m_ConstantQ;

    double* m_FFTRe;
    double* m_FFTIm;
    double* m_CQRe;
    double* m_CQIm;

};

#endif