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/* -*- 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 "vamp-sdk/FFT.h"
#include "MeanFilter.h"
#include <cmath>
#include <iostream>
#include <vector>
#include <exception>
using std::vector;
class YinUtil
{
public:
static double sumSquare(const double *in, const size_t startInd, const size_t endInd);
static void difference(const double *in, double *yinBuffer, const size_t yinBufferSize);
static void fastDifference(const double *in, double *yinBuffer, const size_t yinBufferSize);
static void slowDifference(const double *in, double *yinBuffer, const size_t yinBufferSize);
static void cumulativeDifference(double *yinBuffer, const size_t yinBufferSize);
static int absoluteThreshold(const double *yinBuffer, const size_t yinBufferSize, const double thresh);
static vector<double> yinProb(const double *yinBuffer, const size_t prior, const size_t yinBufferSize, size_t minTau = 0, size_t maxTau = 0);
static double parabolicInterpolation(const double *yinBuffer, const size_t tau,
const size_t yinBufferSize);
};
#endif
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