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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.
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.
*/
#include "PeakPicking.h"
#include "maths/Polyfit.h"
#include <iostream>
#include <cstring>
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
PeakPicking::PeakPicking( PPickParams Config )
{
m_workBuffer = NULL;
initialise( Config );
}
PeakPicking::~PeakPicking()
{
deInitialise();
}
void PeakPicking::initialise( PPickParams Config )
{
m_DFLength = Config.length ;
Qfilta = Config.QuadThresh.a ;
Qfiltb = Config.QuadThresh.b ;
Qfiltc = Config.QuadThresh.c ;
m_DFProcessingParams.length = m_DFLength;
m_DFProcessingParams.LPOrd = Config.LPOrd;
m_DFProcessingParams.LPACoeffs = Config.LPACoeffs;
m_DFProcessingParams.LPBCoeffs = Config.LPBCoeffs;
m_DFProcessingParams.winPre = Config.WinT.pre;
m_DFProcessingParams.winPost = Config.WinT.post;
m_DFProcessingParams.AlphaNormParam = Config.alpha;
m_DFProcessingParams.isMedianPositive = false;
m_DFSmoothing = new DFProcess( m_DFProcessingParams );
m_workBuffer = new double[ m_DFLength ];
memset( m_workBuffer, 0, sizeof(double)*m_DFLength);
}
void PeakPicking::deInitialise()
{
delete [] m_workBuffer;
delete m_DFSmoothing;
m_workBuffer = NULL;
}
void PeakPicking::process( double* src, unsigned int len, vector<int> &onsets )
{
if (len < 4) return;
vector <double> m_maxima;
// Signal conditioning
m_DFSmoothing->process( src, m_workBuffer );
for( unsigned int u = 0; u < len; u++)
{
m_maxima.push_back( m_workBuffer[ u ] );
}
quadEval( m_maxima, onsets );
for(unsigned int b = 0; b < m_maxima.size(); b++)
{
src[ b ] = m_maxima[ b ];
}
}
int PeakPicking::quadEval( vector<double> &src, vector<int> &idx )
{
unsigned int maxLength;
vector <int> m_maxIndex;
vector <int> m_onsetPosition;
vector <double> m_maxFit;
vector <double> m_poly;
vector <double> m_err;
m_poly.push_back(0);
m_poly.push_back(0);
m_poly.push_back(0);
for( int t = -2; t < 3; t++)
{
m_err.push_back( (double)t );
}
for( unsigned int i = 2; i < src.size() - 2; i++)
{
if( (src[i] > src[i-1]) && (src[i] > src[i+1]) && (src[i] > 0) )
{
// m_maxIndex.push_back( i + 1 );
m_maxIndex.push_back(i);
}
}
maxLength = m_maxIndex.size();
double selMax = 0;
for( unsigned int j = 0; j < maxLength ; j++)
{
for (int k = -2; k <= 2; ++k)
{
selMax = src[ m_maxIndex[j] + k ] ;
m_maxFit.push_back(selMax);
}
double f = m_poly[0];
double h = m_poly[2];
if (h < -Qfilta || f > Qfiltc)
{
idx.push_back(m_maxIndex[j]);
}
m_maxFit.clear();
}
return 1;
}
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