/usr/include/qm-dsp/dsp/tempotracking/TempoTrack.h is in libqm-dsp-dev 1.7.1-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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/*
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.
*/
#ifndef TEMPOTRACK_H
#define TEMPOTRACK_H
#include <stdio.h>
#include <vector>
#include "dsp/signalconditioning/DFProcess.h"
#include "maths/Correlation.h"
#include "dsp/signalconditioning/Framer.h"
using std::vector;
struct WinThresh
{
unsigned int pre;
unsigned int post;
};
struct TTParams
{
unsigned int winLength; //Analysis window length
unsigned int lagLength; //Lag & Stride size
unsigned int alpha; //alpha-norm parameter
unsigned int LPOrd; // low-pass Filter order
double* LPACoeffs; //low pass Filter den coefficients
double* LPBCoeffs; //low pass Filter num coefficients
WinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
};
class TempoTrack
{
public:
TempoTrack( TTParams Params );
virtual ~TempoTrack();
vector<int> process( vector <double> DF, vector <double> *tempoReturn = 0);
private:
void initialise( TTParams Params );
void deInitialise();
int beatPredict( unsigned int FSP, double alignment, double period, unsigned int step);
int phaseMM( double* DF, double* weighting, unsigned int winLength, double period );
void createPhaseExtractor( double* Filter, unsigned int winLength, double period, unsigned int fsp, unsigned int lastBeat );
int findMeter( double* ACF, unsigned int len, double period );
void constDetect( double* periodP, int currentIdx, int* flag );
void stepDetect( double* periodP, double* periodG, int currentIdx, int* flag );
void createCombFilter( double* Filter, unsigned int winLength, unsigned int TSig, double beatLag );
double tempoMM( double* ACF, double* weight, int sig );
unsigned int m_dataLength;
unsigned int m_winLength;
unsigned int m_lagLength;
double m_rayparam;
double m_sigma;
double m_DFWVNnorm;
vector<int> m_beats; // Vector of detected beats
double m_lockedTempo;
double* m_tempoScratch;
double* m_smoothRCF; // Smoothed Output of Comb Filterbank (m_tempoScratch)
// Processing Buffers
double* m_rawDFFrame; // Original Detection Function Analysis Frame
double* m_smoothDFFrame; // Smoothed Detection Function Analysis Frame
double* m_frameACF; // AutoCorrelation of Smoothed Detection Function
//Low Pass Coefficients for DF Smoothing
double* m_ACoeffs;
double* m_BCoeffs;
// Objetcs/operators declaration
Framer m_DFFramer;
DFProcess* m_DFConditioning;
Correlation m_correlator;
// Config structure for DFProcess
DFProcConfig m_DFPParams;
// also want to smooth m_tempoScratch
DFProcess* m_RCFConditioning;
// Config structure for RCFProcess
DFProcConfig m_RCFPParams;
};
#endif
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