Chris@185: /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */
Chris@185: 
Chris@185: /*
Chris@185:     QM DSP Library
Chris@185: 
Chris@185:     Centre for Digital Music, Queen Mary, University of London.
Chris@185:     This file copyright 2005-2006 Christian Landone.and Matthew Davies.
Chris@84: 
Chris@84:     This program is free software; you can redistribute it and/or
Chris@84:     modify it under the terms of the GNU General Public License as
Chris@84:     published by the Free Software Foundation; either version 2 of the
Chris@84:     License, or (at your option) any later version.  See the file
Chris@185:     COPYING included with this distribution for more information.
Chris@185: */
Chris@185: 
Chris@185: #include "TempoTrack.h"
Chris@185: 
Chris@185: #include "maths/MathAliases.h"
Chris@185: #include "maths/MathUtilities.h"
Chris@185: 
Chris@185: #include <iostream>
Chris@185: 
Chris@185: #include <cassert>
Chris@185: 
Chris@185: //#define DEBUG_TEMPO_TRACK 1
Chris@185: 
Chris@185: 
Chris@185: #define RAY43VAL
Chris@185: 
Chris@185: //////////////////////////////////////////////////////////////////////
Chris@185: // Construction/Destruction
Chris@185: //////////////////////////////////////////////////////////////////////
Chris@185: 
Chris@185: TempoTrack::TempoTrack( TTParams Params )
Chris@185: {
Chris@185:     m_tempoScratch = NULL;
Chris@185:     m_rawDFFrame = NULL;
Chris@185:     m_smoothDFFrame = NULL;
Chris@185:     m_frameACF = NULL;
Chris@185: 	m_smoothRCF = NULL;
Chris@185: 
Chris@185:     m_dataLength = 0;
Chris@185:     m_winLength = 0;
Chris@185:     m_lagLength = 0;
Chris@185: 
Chris@185:     m_rayparam = 0;
Chris@185:     m_sigma = 0;
Chris@185:     m_DFWVNnorm = 0;
Chris@185: 
Chris@185:     initialise( Params );
Chris@185: }
Chris@185: 
Chris@185: TempoTrack::~TempoTrack()
Chris@185: {
Chris@185:     deInitialise();
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::initialise( TTParams Params )
Chris@185: {	
Chris@185:     m_winLength = Params.winLength;
Chris@185:     m_lagLength = Params.lagLength;
Chris@185: 
Chris@185:     m_rayparam	 = 43.0;
Chris@185:     m_sigma = sqrt(3.9017);
Chris@185:     m_DFWVNnorm = exp( ( log( 2.0 ) / m_rayparam ) * ( m_winLength + 2 ) );
Chris@185: 
Chris@185:     m_rawDFFrame = new double[ m_winLength ];
Chris@185:     m_smoothDFFrame = new double[ m_winLength ];
Chris@185:     m_frameACF = new double[ m_winLength ];
Chris@185:     m_tempoScratch = new double[ m_lagLength ];
Chris@185: 	m_smoothRCF = new double[ m_lagLength ];
Chris@185: 
Chris@185: 
Chris@185:     unsigned int winPre = Params.WinT.pre;
Chris@185:     unsigned int winPost = Params.WinT.post;
Chris@185: 
Chris@185:     m_DFFramer.configure( m_winLength, m_lagLength );
Chris@185: 	
Chris@185:     m_DFPParams.length = m_winLength;
Chris@185:     m_DFPParams.AlphaNormParam = Params.alpha;
Chris@185:     m_DFPParams.LPOrd = Params.LPOrd;
Chris@185:     m_DFPParams.LPACoeffs = Params.LPACoeffs;
Chris@185:     m_DFPParams.LPBCoeffs = Params.LPBCoeffs;
Chris@185:     m_DFPParams.winPre = Params.WinT.pre;
Chris@185:     m_DFPParams.winPost = Params.WinT.post;
Chris@185:     m_DFPParams.isMedianPositive = true;
Chris@185: 	
Chris@185:     m_DFConditioning = new DFProcess( m_DFPParams );
Chris@185: 
Chris@185: 
Chris@185: 	// these are parameters for smoothing m_tempoScratch
Chris@185:     m_RCFPParams.length = m_lagLength;
Chris@185:     m_RCFPParams.AlphaNormParam = Params.alpha;
Chris@185:     m_RCFPParams.LPOrd = Params.LPOrd;
Chris@185:     m_RCFPParams.LPACoeffs = Params.LPACoeffs;
Chris@185:     m_RCFPParams.LPBCoeffs = Params.LPBCoeffs;
Chris@185:     m_RCFPParams.winPre = Params.WinT.pre;
Chris@185:     m_RCFPParams.winPost = Params.WinT.post;
Chris@185:     m_RCFPParams.isMedianPositive = true;
Chris@185: 
Chris@185:     m_RCFConditioning = new DFProcess( m_RCFPParams );
Chris@185: 
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::deInitialise()
Chris@185: {	
Chris@185:     delete [] m_rawDFFrame;
Chris@185: 	
Chris@185:     delete [] m_smoothDFFrame;
Chris@185: 
Chris@185: 	delete [] m_smoothRCF;	
Chris@185: 	
Chris@185:     delete [] m_frameACF;
Chris@185: 
Chris@185:     delete [] m_tempoScratch;
Chris@185: 
Chris@185:     delete m_DFConditioning;
Chris@185: 	
Chris@185: 	delete m_RCFConditioning;
Chris@185: 
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::createCombFilter(double* Filter, unsigned int winLength, unsigned int TSig, double beatLag)
Chris@185: {
Chris@185:     unsigned int i;
Chris@185: 
Chris@185:     if( beatLag == 0 )
Chris@185:     {
Chris@185: 	for( i = 0; i < winLength; i++ )
Chris@185: 	{    
Chris@185: 	    Filter[ i ] = ( ( i + 1 ) / pow( m_rayparam, 2.0) ) * exp( ( -pow(( i + 1 ),2.0 ) / ( 2.0 * pow( m_rayparam, 2.0))));
Chris@185: 	}
Chris@185:     }
Chris@185:     else
Chris@185:     {	
Chris@185: 	m_sigma = beatLag/4;
Chris@185: 	for( i = 0; i < winLength; i++ )
Chris@185: 	{
Chris@185: 	    double dlag = (double)(i+1) - beatLag;
Chris@185: 	    Filter[ i ] =  exp(-0.5 * pow(( dlag / m_sigma), 2.0) ) / (sqrt( 2 * PI) * m_sigma);
Chris@185: 	}
Chris@185:     }
Chris@185: }
Chris@185: 
Chris@185: double TempoTrack::tempoMM(double* ACF, double* weight, int tsig)
Chris@185: {
Chris@185: 
Chris@185:     double period = 0;
Chris@185:     double maxValRCF = 0.0;
Chris@185:     unsigned int maxIndexRCF = 0;
Chris@185: 
Chris@185:     double* pdPeaks;
Chris@185: 
Chris@185:     unsigned int maxIndexTemp;
Chris@185:     double	maxValTemp;
Chris@185:     unsigned int count; 
Chris@185: 	
Chris@185:     unsigned int numelem,i,j;
Chris@185:     int a, b;
Chris@185: 
Chris@185:     for( i = 0; i < m_lagLength; i++ )
Chris@185: 	m_tempoScratch[ i ] = 0.0;
Chris@185: 
Chris@185:     if( tsig == 0 ) 
Chris@185:     {
Chris@185: 	//if time sig is unknown, use metrically unbiased version of Filterbank
Chris@185: 	numelem = 4;
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	numelem = tsig;
Chris@185:     }
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:     std::cerr << "tempoMM: m_winLength = " << m_winLength << ", m_lagLength = " << m_lagLength << ", numelem = " << numelem << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185:     for(i=1;i<m_lagLength-1;i++)
Chris@185:     {
Chris@185: 	//first and last output values are left intentionally as zero
Chris@185: 	for (a=1;a<=numelem;a++)
Chris@185: 	{
Chris@185: 	    for(b=(1-a);b<a;b++)
Chris@185: 	    {
Chris@185: 		if( tsig == 0 )
Chris@185: 		{					
Chris@185: 		    m_tempoScratch[i] += ACF[a*(i+1)+b-1] * (1.0 / (2.0 * (double)a-1)) * weight[i];
Chris@185: 		}
Chris@185: 		else
Chris@185: 		{
Chris@185: 		    m_tempoScratch[i] += ACF[a*(i+1)+b-1] * 1 * weight[i];
Chris@185: 		}
Chris@185: 	    }
Chris@185: 	}
Chris@185:     }
Chris@185: 
Chris@185: 
Chris@185: 	//////////////////////////////////////////////////
Chris@185: 	// MODIFIED BEAT PERIOD EXTRACTION //////////////
Chris@185: 	/////////////////////////////////////////////////
Chris@185: 
Chris@185: 	// find smoothed version of RCF ( as applied to Detection Function)
Chris@185: 	m_RCFConditioning->process( m_tempoScratch, m_smoothRCF);
Chris@185: 
Chris@185: 	if (tsig != 0) // i.e. in context dependent state
Chris@185: 	{	
Chris@185: //     NOW FIND MAX INDEX OF ACFOUT
Chris@185:             for( i = 0; i < m_lagLength; i++)
Chris@185:             {
Chris@185:                 if( m_tempoScratch[ i ] > maxValRCF)
Chris@185:                 {
Chris@185:                     maxValRCF = m_tempoScratch[ i ];
Chris@185:                     maxIndexRCF = i;
Chris@185:                 }
Chris@185:             }
Chris@185: 	}
Chris@185: 	else // using rayleigh weighting
Chris@185: 	{
Chris@185: 		vector <vector<double> > rcfMat;
Chris@185: 	
Chris@185: 		double sumRcf = 0.;
Chris@185: 	
Chris@185: 		double maxVal = 0.;
Chris@185: 		// now find the two values which minimise rcfMat
Chris@185: 		double minVal = 0.;
Chris@185: 		int p_i = 1; // periodicity for row i;
Chris@185: 		int p_j = 1; //periodicity for column j;
Chris@185: 	
Chris@185: 	
Chris@185: 		for ( i=0; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			m_tempoScratch[i] =m_smoothRCF[i];
Chris@185: 		}	
Chris@185: 
Chris@185: 		// normalise m_tempoScratch so that it sums to zero.
Chris@185: 		for ( i=0; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			sumRcf += m_tempoScratch[i];
Chris@185: 		}	
Chris@185: 	
Chris@185: 		for( i=0; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			m_tempoScratch[i] /= sumRcf;
Chris@185: 		}	
Chris@185: 	
Chris@185: 		// create a matrix to store m_tempoScratchValues modified by log2 ratio
Chris@185: 		for ( i=0; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			rcfMat.push_back  ( vector<double>() ); // adds a new row...
Chris@185: 		}
Chris@185: 	
Chris@185: 		for (i=0; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			for (j=0; j<m_lagLength; j++)
Chris@185: 			{
Chris@185: 				rcfMat[i].push_back (0.);
Chris@185: 			}
Chris@185: 		}
Chris@185: 	
Chris@185: 		// the 'i' and 'j' indices deliberately start from '1' and not '0'
Chris@185: 		for ( i=1; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			for (j=1; j<m_lagLength; j++)
Chris@185: 			{
Chris@185: 				double log2PeriodRatio = log( static_cast<double>(i)/static_cast<double>(j) ) / log(2.0);
Chris@185: 				rcfMat[i][j] = ( abs(1.0-abs(log2PeriodRatio)) );
Chris@185: 				rcfMat[i][j] += ( 0.01*( 1./(m_tempoScratch[i]+m_tempoScratch[j]) ) );
Chris@185: 			}
Chris@185: 		}
Chris@185: 		
Chris@185: 		// set diagonal equal to maximum value in rcfMat 
Chris@185: 		// we don't want to pick one strong middle peak - we need a combination of two peaks.
Chris@185: 	
Chris@185: 		for ( i=1; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			for (j=1; j<m_lagLength; j++)
Chris@185: 			{
Chris@185: 				if (rcfMat[i][j] > maxVal)
Chris@185: 				{	
Chris@185: 					maxVal = rcfMat[i][j];
Chris@185: 				}
Chris@185: 			}
Chris@185: 		}
Chris@185: 	
Chris@185: 		for ( i=1; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			rcfMat[i][i] = maxVal;
Chris@185: 		}
Chris@185: 	
Chris@185: 		// now find the row and column number which minimise rcfMat
Chris@185: 		minVal = maxVal;
Chris@185: 		
Chris@185: 		for ( i=1; i<m_lagLength; i++)
Chris@185: 		{
Chris@185: 			for ( j=1; j<m_lagLength; j++)
Chris@185: 			{
Chris@185: 				if (rcfMat[i][j] < minVal)
Chris@185: 				{	
Chris@185: 					minVal = rcfMat[i][j];
Chris@185: 					p_i = i;
Chris@185: 					p_j = j;
Chris@185: 				}
Chris@185: 			}
Chris@185: 		}
Chris@185: 	
Chris@185: 	
Chris@185: 		// initially choose p_j (arbitrary) - saves on an else statement
Chris@185: 		int beatPeriod = p_j;
Chris@185: 		if (m_tempoScratch[p_i] > m_tempoScratch[p_j])
Chris@185: 		{
Chris@185: 			beatPeriod = p_i;
Chris@185: 		}
Chris@185: 		
Chris@185: 		// now write the output
Chris@185: 		maxIndexRCF = static_cast<int>(beatPeriod);
Chris@185: 	}
Chris@185: 
Chris@185: 
Chris@185:     double locked = 5168.f / maxIndexRCF;
Chris@185:     if (locked >= 30 && locked <= 180) {
Chris@185:         m_lockedTempo = locked;
Chris@185:     }
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:     std::cerr << "tempoMM: locked tempo = " << m_lockedTempo << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185:     if( tsig == 0 )
Chris@185: 	tsig = 4;
Chris@185: 
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185: std::cerr << "tempoMM: maxIndexRCF = " << maxIndexRCF << std::endl;
Chris@185: #endif
Chris@185: 	
Chris@185:     if( tsig == 4 )
Chris@185:     {
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:         std::cerr << "tsig == 4" << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185: 	pdPeaks = new double[ 4 ];
Chris@185: 	for( i = 0; i < 4; i++ ){ pdPeaks[ i ] = 0.0;}
Chris@185: 
Chris@185: 	pdPeaks[ 0 ] = ( double )maxIndexRCF + 1;
Chris@185: 
Chris@185: 	maxIndexTemp = 0;
Chris@185: 	maxValTemp = 0.0;
Chris@185: 	count = 0;
Chris@185: 
Chris@185: 	for( i = (2 * maxIndexRCF + 1) - 1; i < (2 * maxIndexRCF + 1) + 2; i++ )
Chris@185: 	{
Chris@185: 	    if( ACF[ i ] > maxValTemp )
Chris@185: 	    {
Chris@185: 		maxValTemp = ACF[ i ];
Chris@185: 		maxIndexTemp = count;
Chris@185: 	    }
Chris@185: 	    count++;
Chris@185: 	}
Chris@185: 	pdPeaks[ 1 ] = (double)( maxIndexTemp + 1 + ( (2 * maxIndexRCF + 1 ) - 2 ) + 1 )/2;
Chris@185: 
Chris@185: 	maxIndexTemp = 0;
Chris@185: 	maxValTemp = 0.0;
Chris@185: 	count = 0;
Chris@185: 
Chris@185: 	for( i = (3 * maxIndexRCF + 2 ) - 2; i < (3 * maxIndexRCF + 2 ) + 3; i++ )
Chris@185: 	{
Chris@185: 	    if( ACF[ i ] > maxValTemp )
Chris@185: 	    {
Chris@185: 		maxValTemp = ACF[ i ];
Chris@185: 		maxIndexTemp = count;
Chris@185: 	    }
Chris@185: 	    count++;
Chris@185: 	}
Chris@185: 	pdPeaks[ 2 ] = (double)( maxIndexTemp + 1 + ( (3 * maxIndexRCF + 2) - 4 ) + 1 )/3;
Chris@185: 
Chris@185: 	maxIndexTemp = 0;
Chris@185: 	maxValTemp = 0.0;
Chris@185: 	count = 0;
Chris@185: 
Chris@185: 	for( i = ( 4 * maxIndexRCF + 3) - 3; i < ( 4 * maxIndexRCF + 3) + 4; i++ )
Chris@185: 	{
Chris@185: 	    if( ACF[ i ] > maxValTemp )
Chris@185: 	    {
Chris@185: 		maxValTemp = ACF[ i ];
Chris@185: 		maxIndexTemp = count;
Chris@185: 	    }
Chris@185: 	    count++;
Chris@185: 	}
Chris@185: 	pdPeaks[ 3 ] = (double)( maxIndexTemp + 1 + ( (4 * maxIndexRCF + 3) - 9 ) + 1 )/4 ;
Chris@185: 
Chris@185: 
Chris@185: 	period = MathUtilities::mean( pdPeaks, 4 );
Chris@185:     }
Chris@185:     else
Chris@185:     { 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:        std::cerr << "tsig != 4" << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185: 	pdPeaks = new double[ 3 ];
Chris@185: 	for( i = 0; i < 3; i++ ){ pdPeaks[ i ] = 0.0;}
Chris@185: 
Chris@185: 	pdPeaks[ 0 ] = ( double )maxIndexRCF + 1;
Chris@185: 
Chris@185: 	maxIndexTemp = 0;
Chris@185: 	maxValTemp = 0.0;
Chris@185: 	count = 0;
Chris@185: 
Chris@185: 	for( i = (2 * maxIndexRCF + 1) - 1; i < (2 * maxIndexRCF + 1) + 2; i++ )
Chris@185: 	{
Chris@185: 	    if( ACF[ i ] > maxValTemp )
Chris@185: 	    {
Chris@185: 		maxValTemp = ACF[ i ];
Chris@185: 		maxIndexTemp = count;
Chris@185: 	    }
Chris@185: 	    count++;
Chris@185: 	}
Chris@185: 	pdPeaks[ 1 ] = (double)( maxIndexTemp + 1 + ( (2 * maxIndexRCF + 1 ) - 2 ) + 1 )/2;
Chris@185: 
Chris@185: 	maxIndexTemp = 0;
Chris@185: 	maxValTemp = 0.0;
Chris@185: 	count = 0;
Chris@185: 
Chris@185: 	for( i = (3 * maxIndexRCF + 2 ) - 2; i < (3 * maxIndexRCF + 2 ) + 3; i++ )
Chris@185: 	{
Chris@185: 	    if( ACF[ i ] > maxValTemp )
Chris@185: 	    {
Chris@185: 		maxValTemp = ACF[ i ];
Chris@185: 		maxIndexTemp = count;
Chris@185: 	    }
Chris@185: 	    count++;
Chris@185: 	}
Chris@185: 	pdPeaks[ 2 ] = (double)( maxIndexTemp + 1 + ( (3 * maxIndexRCF + 2) - 4 ) + 1 )/3;
Chris@185: 
Chris@185: 
Chris@185: 	period = MathUtilities::mean( pdPeaks, 3 );
Chris@185:     }
Chris@185: 
Chris@185:     delete [] pdPeaks;
Chris@185: 
Chris@185:     return period;
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::stepDetect( double* periodP, double* periodG, int currentIdx, int* flag )
Chris@185: {
Chris@185:     double stepthresh = 1 * 3.9017;
Chris@185: 
Chris@185:     if( *flag )
Chris@185:     {
Chris@185: 	if(abs(periodG[ currentIdx ] - periodP[ currentIdx ]) > stepthresh)
Chris@185: 	{
Chris@185: 	    // do nuffin'
Chris@185: 	}
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	if(fabs(periodG[ currentIdx ]-periodP[ currentIdx ]) > stepthresh)
Chris@185: 	{
Chris@185: 	    *flag = 3;
Chris@185: 	}
Chris@185:     }
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::constDetect( double* periodP, int currentIdx, int* flag )
Chris@185: {
Chris@185:     double constthresh = 2 * 3.9017;
Chris@185: 
Chris@185:     if( fabs( 2 * periodP[ currentIdx ] - periodP[ currentIdx - 1] - periodP[ currentIdx - 2] ) < constthresh)
Chris@185:     {
Chris@185: 	*flag = 1;
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	*flag = 0;
Chris@185:     }
Chris@185: }
Chris@185: 
Chris@185: int TempoTrack::findMeter(double *ACF, unsigned int len, double period)
Chris@185: {
Chris@185:     int i;
Chris@185:     int p = (int)MathUtilities::round( period );
Chris@185:     int tsig;
Chris@185: 
Chris@185:     double Energy_3 = 0.0;
Chris@185:     double Energy_4 = 0.0;
Chris@185: 
Chris@185:     double temp3A = 0.0;
Chris@185:     double temp3B = 0.0;
Chris@185:     double temp4A = 0.0;
Chris@185:     double temp4B = 0.0;
Chris@185: 
Chris@185:     double* dbf = new double[ len ]; int t = 0;
Chris@185:     for( unsigned int u = 0; u < len; u++ ){ dbf[ u ] = 0.0; }
Chris@185: 
Chris@185:     if( (double)len < 6 * p + 2 )
Chris@185:     {
Chris@185: 	for( i = ( 3 * p - 2 ); i < ( 3 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp3A += ACF[ i ];
Chris@185: 	    dbf[ t++ ] = ACF[ i ];
Chris@185: 	}
Chris@185: 	
Chris@185: 	for( i = ( 4 * p - 2 ); i < ( 4 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp4A += ACF[ i ];
Chris@185: 	}
Chris@185: 
Chris@185: 	Energy_3 = temp3A;
Chris@185: 	Energy_4 = temp4A;
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	for( i = ( 3 * p - 2 ); i < ( 3 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp3A += ACF[ i ];
Chris@185: 	}
Chris@185: 	
Chris@185: 	for( i = ( 4 * p - 2 ); i < ( 4 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp4A += ACF[ i ];
Chris@185: 	}
Chris@185: 
Chris@185: 	for( i = ( 6 * p - 2 ); i < ( 6 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp3B += ACF[ i ];
Chris@185: 	}
Chris@185: 	
Chris@185: 	for( i = ( 2 * p - 2 ); i < ( 2 * p + 2 ) + 1; i++ )
Chris@185: 	{
Chris@185: 	    temp4B += ACF[ i ];
Chris@185: 	}
Chris@185: 
Chris@185: 	Energy_3 = temp3A + temp3B;
Chris@185: 	Energy_4 = temp4A + temp4B;
Chris@185:     }
Chris@185: 
Chris@185:     if (Energy_3 > Energy_4)
Chris@185:     {
Chris@185: 	tsig = 3;
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	tsig = 4;
Chris@185:     }
Chris@185: 
Chris@185: 
Chris@185:     return tsig;
Chris@185: }
Chris@185: 
Chris@185: void TempoTrack::createPhaseExtractor(double *Filter, unsigned int winLength, double period, unsigned int fsp, unsigned int lastBeat)
Chris@185: {	
Chris@185:     int p = (int)MathUtilities::round( period );
Chris@185:     int predictedOffset = 0;
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:     std::cerr << "TempoTrack::createPhaseExtractor: period = " << period << ", p = " << p << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185:     if (p > 10000) {
Chris@185:         std::cerr << "TempoTrack::createPhaseExtractor: WARNING! Highly implausible period value " << p << "!" << std::endl;
Chris@185:         period = 5168 / 120;
Chris@185:     }
Chris@185: 
Chris@185:     double* phaseScratch = new double[ p*2 + 2 ];
Chris@185:     for (int i = 0; i < p*2 + 2; ++i) phaseScratch[i] = 0.0;
Chris@185: 
Chris@185: 	
Chris@185:     if( lastBeat != 0 )
Chris@185:     {
Chris@185: 	lastBeat = (int)MathUtilities::round((double)lastBeat );///(double)winLength);
Chris@185: 
Chris@185:         predictedOffset = lastBeat + p - fsp;
Chris@185: 
Chris@185:         if (predictedOffset < 0) 
Chris@185:         {
Chris@185:             lastBeat = 0;
Chris@185:         }
Chris@185:     }
Chris@185: 
Chris@185:     if( lastBeat != 0 )
Chris@185:     {
Chris@185: 	int mu = p;
Chris@185: 	double sigma = (double)p/8;
Chris@185: 	double PhaseMin = 0.0;
Chris@185: 	double PhaseMax = 0.0;
Chris@185: 	unsigned int scratchLength = p*2;
Chris@185: 	double temp = 0.0;
Chris@185: 
Chris@185: 	for(  int i = 0; i < scratchLength; i++ )
Chris@185: 	{
Chris@185: 	    phaseScratch[ i ] = exp( -0.5 * pow( ( i - mu ) / sigma, 2 ) ) / ( sqrt( 2*PI ) *sigma );
Chris@185: 	}
Chris@185: 
Chris@185: 	MathUtilities::getFrameMinMax( phaseScratch, scratchLength, &PhaseMin, &PhaseMax );
Chris@185: 			
Chris@185: 	for(int i = 0; i < scratchLength; i ++)
Chris@185: 	{
Chris@185: 	    temp = phaseScratch[ i ];
Chris@185: 	    phaseScratch[ i ] = (temp - PhaseMin)/PhaseMax;
Chris@185: 	}
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:         std::cerr << "predictedOffset = " << predictedOffset << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185: 	unsigned int index = 0;
Chris@185: 	for (int i = p - ( predictedOffset - 1); i < p + ( p - predictedOffset) + 1; i++)
Chris@185: 	{
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:             std::cerr << "assigning to filter index " << index << " (size = " << p*2 << ")" << " value " << phaseScratch[i] << " from scratch index " << i << std::endl;
Chris@185: #endif
Chris@185: 	    Filter[ index++ ] = phaseScratch[ i ];
Chris@185: 	}
Chris@185:     }
Chris@185:     else
Chris@185:     {
Chris@185: 	for( int i = 0; i < p; i ++)
Chris@185: 	{
Chris@185: 	    Filter[ i ] = 1;
Chris@185: 	}
Chris@185:     }
Chris@185: 	
Chris@185:     delete [] phaseScratch;
Chris@185: }
Chris@185: 
Chris@185: int TempoTrack::phaseMM(double *DF, double *weighting, unsigned int winLength, double period)
Chris@185: {
Chris@185:     int alignment = 0;
Chris@185:     int p = (int)MathUtilities::round( period );
Chris@185: 
Chris@185:     double temp = 0.0;
Chris@185: 
Chris@185:     double* y = new double[ winLength ];
Chris@185:     double* align = new double[ p ];
Chris@185: 
Chris@185:     for( int i = 0; i < winLength; i++ )
Chris@185:     {	
Chris@185: 	y[ i ] = (double)( -i + winLength  )/(double)winLength;
Chris@185: 	y[ i ] = pow(y [i ],2.0); // raise to power 2.
Chris@185:     }
Chris@185: 
Chris@185:     for( int o = 0; o < p; o++ )
Chris@185:     { 
Chris@185: 	temp = 0.0;
Chris@185: 	for(int i = 1 + (o - 1); i< winLength; i += (p + 1))
Chris@185: 	{
Chris@185: 	    temp = temp + DF[ i ] * y[ i ]; 
Chris@185: 	}
Chris@185: 	align[ o ] = temp * weighting[ o ];       
Chris@185:     }
Chris@185: 
Chris@185: 
Chris@185:     double valTemp = 0.0;
Chris@185:     for(int i = 0; i < p; i++)
Chris@185:     {
Chris@185: 	if( align[ i ] > valTemp )
Chris@185: 	{
Chris@185: 	    valTemp = align[ i ];
Chris@185: 	    alignment = i;
Chris@185: 	}
Chris@185:     }
Chris@185: 
Chris@185:     delete [] y;
Chris@185:     delete [] align;
Chris@185: 
Chris@185:     return alignment;
Chris@185: }
Chris@185: 
Chris@185: int TempoTrack::beatPredict(unsigned int FSP0, double alignment, double period, unsigned int step )
Chris@185: {
Chris@185:     int beat = 0;
Chris@185: 
Chris@185:     int p = (int)MathUtilities::round( period );
Chris@185:     int align = (int)MathUtilities::round( alignment );
Chris@185:     int FSP = (int)MathUtilities::round( FSP0 );
Chris@185: 
Chris@185:     int FEP = FSP + ( step );
Chris@185: 
Chris@185:     beat = FSP + align;
Chris@185: 
Chris@185:     m_beats.push_back( beat );
Chris@185: 
Chris@185:     while( beat + p < FEP )
Chris@185:     {
Chris@185: 	beat += p;
Chris@185: 		
Chris@185: 	m_beats.push_back( beat );
Chris@185:     }
Chris@185: 
Chris@185:     return beat;
Chris@185: }
Chris@185: 
Chris@185: 
Chris@185: 
Chris@185: vector<int> TempoTrack::process( vector <double> DF,
Chris@185:                                  vector <double> *tempoReturn )
Chris@185: {
Chris@185:     m_dataLength = DF.size();
Chris@185: 	
Chris@185:     m_lockedTempo = 0.0;
Chris@185: 
Chris@185:     double	period = 0.0;
Chris@185:     int stepFlag = 0;
Chris@185:     int constFlag = 0;
Chris@185:     int FSP = 0;
Chris@185:     int tsig = 0;
Chris@185:     int lastBeat = 0;
Chris@185: 
Chris@185:     vector <double> causalDF;
Chris@185: 
Chris@185:     causalDF = DF;
Chris@185: 
Chris@185:     //Prepare Causal Extension DFData
Chris@185:     unsigned int DFCLength = m_dataLength + m_winLength;
Chris@185: 	
Chris@185:     for( unsigned int j = 0; j < m_winLength; j++ )
Chris@185:     {
Chris@185: 	causalDF.push_back( 0 );
Chris@185:     }
Chris@185: 	
Chris@185: 	
Chris@185:     double* RW = new double[ m_lagLength ];
Chris@185:     for( unsigned int clear = 0; clear < m_lagLength; clear++){ RW[ clear ] = 0.0;}
Chris@185: 
Chris@185:     double* GW = new double[ m_lagLength ];
Chris@185:     for(unsigned int clear = 0; clear < m_lagLength; clear++){ GW[ clear ] = 0.0;}
Chris@185: 
Chris@185:     double* PW = new double[ m_lagLength ];
Chris@185:     for(unsigned clear = 0; clear < m_lagLength; clear++){ PW[ clear ] = 0.0;}
Chris@185: 
Chris@185:     m_DFFramer.setSource( &causalDF[0], m_dataLength );
Chris@185: 
Chris@185:     unsigned int TTFrames = m_DFFramer.getMaxNoFrames();
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:     std::cerr << "TTFrames = " << TTFrames << std::endl;
Chris@185: #endif
Chris@185: 	
Chris@185:     double* periodP = new double[ TTFrames ];
Chris@185:     for(unsigned clear = 0; clear < TTFrames; clear++){ periodP[ clear ] = 0.0;}
Chris@185: 	
Chris@185:     double* periodG = new double[ TTFrames ];
Chris@185:     for(unsigned clear = 0; clear < TTFrames; clear++){ periodG[ clear ] = 0.0;}
Chris@185: 	
Chris@185:     double* alignment = new double[ TTFrames ];
Chris@185:     for(unsigned clear = 0; clear < TTFrames; clear++){ alignment[ clear ] = 0.0;}
Chris@185: 
Chris@185:     m_beats.clear();
Chris@185: 
Chris@185:     createCombFilter( RW, m_lagLength, 0, 0 );
Chris@185: 
Chris@185:     int TTLoopIndex = 0;
Chris@185: 
Chris@185:     for( unsigned int i = 0; i < TTFrames; i++ )
Chris@185:     {
Chris@185: 	m_DFFramer.getFrame( m_rawDFFrame );
Chris@185: 
Chris@185: 	m_DFConditioning->process( m_rawDFFrame, m_smoothDFFrame );
Chris@185: 
Chris@185: 	m_correlator.doAutoUnBiased( m_smoothDFFrame, m_frameACF, m_winLength );
Chris@185: 		
Chris@185: 	periodP[ TTLoopIndex ] = tempoMM( m_frameACF, RW, 0 );
Chris@185: 
Chris@185: 	if( GW[ 0 ] != 0 )
Chris@185: 	{
Chris@185: 	    periodG[ TTLoopIndex ] = tempoMM( m_frameACF, GW, tsig );
Chris@185: 	}
Chris@185: 	else
Chris@185: 	{
Chris@185: 	    periodG[ TTLoopIndex ] = 0.0;
Chris@185: 	}
Chris@185: 
Chris@185: 	stepDetect( periodP, periodG, TTLoopIndex, &stepFlag );
Chris@185: 
Chris@185: 	if( stepFlag == 1)
Chris@185: 	{
Chris@185: 	    constDetect( periodP, TTLoopIndex, &constFlag );
Chris@185: 	    stepFlag = 0;
Chris@185: 	}
Chris@185: 	else
Chris@185: 	{
Chris@185: 	    stepFlag -= 1;
Chris@185: 	}
Chris@185: 
Chris@185: 	if( stepFlag < 0 )
Chris@185: 	{
Chris@185: 	    stepFlag = 0;
Chris@185: 	}
Chris@185: 
Chris@185: 	if( constFlag != 0)
Chris@185: 	{
Chris@185: 	    tsig = findMeter( m_frameACF, m_winLength, periodP[ TTLoopIndex ] );
Chris@185: 	
Chris@185: 	    createCombFilter( GW, m_lagLength, tsig, periodP[ TTLoopIndex ] );
Chris@185: 			
Chris@185: 	    periodG[ TTLoopIndex ] = tempoMM( m_frameACF, GW, tsig ); 
Chris@185: 
Chris@185: 	    period = periodG[ TTLoopIndex ];
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:             std::cerr << "TempoTrack::process: constFlag == " << constFlag << ", TTLoopIndex = " << TTLoopIndex << ", period from periodG = " << period << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185: 	    createPhaseExtractor( PW, m_winLength, period, FSP, 0 ); 
Chris@185: 
Chris@185: 	    constFlag = 0;
Chris@185: 
Chris@185: 	}
Chris@185: 	else
Chris@185: 	{
Chris@185: 	    if( GW[ 0 ] != 0 )
Chris@185: 	    {
Chris@185: 		period = periodG[ TTLoopIndex ];
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:                 std::cerr << "TempoTrack::process: GW[0] == " << GW[0] << ", TTLoopIndex = " << TTLoopIndex << ", period from periodG = " << period << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185:                 if (period > 10000) {
Chris@185:                     std::cerr << "TempoTrack::process: WARNING!  Highly implausible period value " << period << "!" << std::endl;
Chris@185:                     std::cerr << "periodG contains (of " << TTFrames << " frames): " << std::endl;
Chris@185:                     for (int i = 0; i < TTLoopIndex + 3 && i < TTFrames; ++i) {
Chris@185:                         std::cerr << i << " -> " << periodG[i] << std::endl;
Chris@185:                     }
Chris@185:                     std::cerr << "periodP contains (of " << TTFrames << " frames): " << std::endl;
Chris@185:                     for (int i = 0; i < TTLoopIndex + 3 && i < TTFrames; ++i) {
Chris@185:                         std::cerr << i << " -> " << periodP[i] << std::endl;
Chris@185:                     }
Chris@185:                     period = 5168 / 120;
Chris@185:                 }
Chris@185: 
Chris@185: 		createPhaseExtractor( PW, m_winLength, period, FSP, lastBeat ); 
Chris@185: 
Chris@185: 	    }
Chris@185: 	    else
Chris@185: 	    {
Chris@185: 		period = periodP[ TTLoopIndex ];
Chris@185: 
Chris@185: #ifdef DEBUG_TEMPO_TRACK
Chris@185:                 std::cerr << "TempoTrack::process: GW[0] == " << GW[0] << ", TTLoopIndex = " << TTLoopIndex << ", period from periodP = " << period << std::endl;
Chris@185: #endif
Chris@185: 
Chris@185: 		createPhaseExtractor( PW, m_winLength, period, FSP, 0 ); 
Chris@185: 	    }
Chris@185: 	}
Chris@185: 
Chris@185: 	alignment[ TTLoopIndex ] = phaseMM( m_rawDFFrame, PW, m_winLength, period ); 
Chris@185: 
Chris@185: 	lastBeat = beatPredict(FSP, alignment[ TTLoopIndex ], period, m_lagLength );
Chris@185: 
Chris@185: 	FSP += (m_lagLength);
Chris@185: 
Chris@185:         if (tempoReturn) tempoReturn->push_back(m_lockedTempo);
Chris@185: 
Chris@185: 	TTLoopIndex++;
Chris@185:     }
Chris@185: 
Chris@185: 
Chris@185:     delete [] periodP;
Chris@185:     delete [] periodG;
Chris@185:     delete [] alignment;
Chris@185: 
Chris@185:     delete [] RW;
Chris@185:     delete [] GW;
Chris@185:     delete [] PW;
Chris@185: 
Chris@185:     return m_beats;
Chris@185: }
Chris@185: