view cpp-qm-dsp/CQInverse.h @ 93:908be1d06bd2

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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) 2013-2014 Queen Mary, University of London

    Permission is hereby granted, free of charge, to any person
    obtaining a copy of this software and associated documentation
    files (the "Software"), to deal in the Software without
    restriction, including without limitation the rights to use, copy,
    modify, merge, publish, distribute, sublicense, and/or sell copies
    of the Software, and to permit persons to whom the Software is
    furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be
    included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
    NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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    CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
    WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    Except as contained in this notice, the names of the Centre for
    Digital Music; Queen Mary, University of London; and Chris Cannam
    shall not be used in advertising or otherwise to promote the sale,
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*/

#ifndef CQINVERSE_H
#define CQINVERSE_H

#include "CQBase.h"
#include "CQKernel.h"

class Resampler;
class FFTReal;

class CQInverse : public CQBase
{
public:
    CQInverse(double sampleRate,
	      double minFreq, double maxFreq,
	      int binsPerOctave);
    ~CQInverse();

    virtual double getSampleRate() const { return m_sampleRate; }
    virtual int getBinsPerOctave() const { return m_binsPerOctave; }
    virtual int getOctaves() const { return m_octaves; }
    virtual int getTotalBins() const { return m_octaves * m_binsPerOctave; }
    virtual int getColumnHop() const { return m_p.fftHop / m_p.atomsPerFrame; }
    virtual int getLatency() const { return m_outputLatency; } 
    virtual double getMaxFrequency() const { return m_p.maxFrequency; }
    virtual double getMinFrequency() const; // actual min, not that passed to ctor
    virtual double getBinFrequency(int bin) const;

    // Input is the format produced by ConstantQ class,
    // i.e. uninterpolated complex, not the real-valued stuff produced
    // by CQSpectrogram

    RealSequence process(const ComplexBlock &);
    RealSequence getRemainingOutput();

private:
    double m_sampleRate;
    double m_maxFrequency;
    double m_minFrequency;
    int m_binsPerOctave;
    int m_octaves;

    CQKernel *m_kernel;
    CQKernel::Properties m_p;
    int m_bigBlockSize;

    std::vector<Resampler *> m_upsamplers;
    std::vector<RealSequence> m_buffers;
    
    int m_outputLatency;

    FFTReal *m_fft;
    
    void initialise();
    void processOctave(int octave, const ComplexBlock &block);
    void processOctaveColumn(int octave, const ComplexColumn &column);
};

#endif