view YinUtil.h @ 137:109c3a2ad930 vamp-fft-revision

Make use of new Vamp FFT interface. This reduces the runtime of the regression test from 5.7 to 2.2 seconds on this machine, but it does need the right version of the SDK, which is currently only available in the vampipe branch.

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

/*
    pYIN - A fundamental frequency estimator for monophonic audio
    Centre for Digital Music, Queen Mary, University of London.
    
    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 _YINUTIL_H_
#define _YINUTIL_H_

#include <cmath>

#include <iostream>
#include <vector>
#include <exception>

#include "vamp-sdk/FFT.h"

using std::vector;

class YinUtil
{
public:
    YinUtil(size_t yinBufferSize);
    ~YinUtil();
    
    double sumSquare(const double *in, const size_t startInd, const size_t endInd);
    void difference(const double *in, double *yinBuffer);
    void fastDifference(const double *in, double *yinBuffer);
    void slowDifference(const double *in, double *yinBuffer);
    void cumulativeDifference(double *yinBuffer);
    int absoluteThreshold(const double *yinBuffer, const double thresh);
    vector<double> yinProb(const double *yinBuffer, const size_t prior,
                           size_t minTau = 0, size_t maxTau = 0);
    double parabolicInterpolation(const double *yinBuffer, const size_t tau);

private:
    const size_t m_yinBufferSize;
    Vamp::FFTReal m_fft;
};

#endif