PhaseVocoder.h

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/* -*- 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 2005-2006 Christian Landone, copyright 2013 QMUL.

    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#ifndef QM_DSP_PHASEVOCODER_H
#define QM_DSP_PHASEVOCODER_H

class FFTReal;

class PhaseVocoder  
{
public:
    PhaseVocoder(int size, int hop);
    virtual ~PhaseVocoder();

    void processTimeDomain(const double *src,
                           double *mag, double *phase, double *unwrapped);

    void processFrequencyDomain(const double *reals, const double *imags,
                                double *mag, double *phase, double *unwrapped);

    void reset();

protected:
    void FFTShift(double *src);
    void getMagnitudes(double *mag);
    void getPhases(double *theta);
    void unwrapPhases(double *theta, double *unwrapped);

    int m_n;
    int m_hop;
    FFTReal *m_fft;
    double *m_time;
    double *m_imag;
    double *m_real;
    double *m_phase;
    double *m_unwrapped;
};

#endif