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// Copyright 2004 "Gilles Degottex"
// This file is part of "Music"
// "Music" is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 of the License, or
// (at your option) any later version.
//
// "Music" is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
#include "CumulativeDiff.h"
#include <iostream>
#include "Music.h"
using namespace Music;
CumulativeDiff::CumulativeDiff(double latency_factor, int ht)
: m_ht(ht)
, m_freq(h2f(m_ht))
, m_s(size_t(GetSamplingRate()/m_freq))
, m_latency_factor(latency_factor)
{
m_error = 0.0;
// cout << "CumulativeDiff::CumulativeDiff ht=" << ht << " AFreq="<<GetAFreq() << " freq=" << m_freq << endl;
}
void CumulativeDiff::receive(const deque<double>& buff, size_t start)
{
if(buff.size()<start+(m_latency_factor+1)*m_s) return;
m_error = 0.0;
for(size_t i=0; i<m_latency_factor*m_s; i++)
m_error += abs(buff[start+i] - buff[start+i+m_s]);
}
RangedCumulativeDiff::RangedCumulativeDiff(double pitch_tolerance, double latency_factor, int ht)
: m_ht(ht)
, m_freq(h2f(m_ht))
, m_pitch_tolerance(pitch_tolerance)
, m_smin(size_t(GetSamplingRate()/(m_freq + m_pitch_tolerance*(h2f(m_ht+1)-m_freq))))
, m_smax(size_t(GetSamplingRate()/(m_freq + m_pitch_tolerance*(h2f(m_ht-1)-m_freq))))
, m_latency_factor(latency_factor)
{
m_error = 0.0;
// cout << "CumulativeDiff::CumulativeDiff ht=" << ht << " pitch_tol=" << m_pitch_tolerance << " seek_factor=" << m_seek_factor << " s=" << m_s << " smin=" << m_smin << " smax=" << m_smax << endl;
}
void RangedCumulativeDiff::receive(const deque<double>& buff, size_t start)
{
if(buff.size()<start+m_latency_factor*m_smax+m_smax) return;
m_error = 0.0;
m_min_error = 1000.0;
// int m=0;
for(size_t s=m_smin; s<=m_smax; s++)
{
double err = 0.0;
// size_t n = 0;
for(size_t i=0; i<m_latency_factor*s; i++)
{
err += abs(buff[start+i] - buff[start+i+s]);
// n++;
}
// err /= n;
if(err<m_min_error)
{
m_min_wave_length = s;
m_min_error = err;
}
// m_error = max(m_error, err);
m_error = m_min_error;
// cout << m_error << endl;
// m_error += err;
// m++;
}
// m_error /= m;
}
void RangedCumulativeDiff::GetMinWaveLength(double pitch_tolerance, int ht, double& error, double min_wave_length)
{
(void)pitch_tolerance;
(void)ht;
(void)error;
(void)min_wave_length;
}
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