112 lines
3.3 KiB
C
112 lines
3.3 KiB
C
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/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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/*
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QM DSP Library
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Centre for Digital Music, Queen Mary, University of London.
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This file 2005-2006 Christian Landone.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version. See the file
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COPYING included with this distribution for more information.
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*/
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#ifndef TEMPOTRACK_H
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#define TEMPOTRACK_H
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#include <stdio.h>
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#include <vector>
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#include "dsp/signalconditioning/DFProcess.h"
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#include "maths/Correlation.h"
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#include "dsp/signalconditioning/Framer.h"
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using std::vector;
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struct WinThresh
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{
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unsigned int pre;
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unsigned int post;
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};
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struct TTParams
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{
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unsigned int winLength; //Analysis window length
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unsigned int lagLength; //Lag & Stride size
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unsigned int alpha; //alpha-norm parameter
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unsigned int LPOrd; // low-pass Filter order
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double* LPACoeffs; //low pass Filter den coefficients
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double* LPBCoeffs; //low pass Filter num coefficients
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WinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
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};
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class TempoTrack
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{
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public:
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TempoTrack( TTParams Params );
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virtual ~TempoTrack();
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vector<int> process( vector <double> DF, vector <double> *tempoReturn = 0);
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private:
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void initialise( TTParams Params );
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void deInitialise();
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int beatPredict( unsigned int FSP, double alignment, double period, unsigned int step);
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int phaseMM( double* DF, double* weighting, unsigned int winLength, double period );
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void createPhaseExtractor( double* Filter, unsigned int winLength, double period, unsigned int fsp, unsigned int lastBeat );
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int findMeter( double* ACF, unsigned int len, double period );
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void constDetect( double* periodP, int currentIdx, int* flag );
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void stepDetect( double* periodP, double* periodG, int currentIdx, int* flag );
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void createCombFilter( double* Filter, unsigned int winLength, unsigned int TSig, double beatLag );
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double tempoMM( double* ACF, double* weight, int sig );
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unsigned int m_dataLength;
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unsigned int m_winLength;
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unsigned int m_lagLength;
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double m_rayparam;
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double m_sigma;
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double m_DFWVNnorm;
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vector<int> m_beats; // Vector of detected beats
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double m_lockedTempo;
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double* m_tempoScratch;
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double* m_smoothRCF; // Smoothed Output of Comb Filterbank (m_tempoScratch)
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// Processing Buffers
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double* m_rawDFFrame; // Original Detection Function Analysis Frame
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double* m_smoothDFFrame; // Smoothed Detection Function Analysis Frame
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double* m_frameACF; // AutoCorrelation of Smoothed Detection Function
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//Low Pass Coefficients for DF Smoothing
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double* m_ACoeffs;
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double* m_BCoeffs;
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// Objetcs/operators declaration
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Framer m_DFFramer;
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DFProcess* m_DFConditioning;
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Correlation m_correlator;
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// Config structure for DFProcess
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DFProcConfig m_DFPParams;
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// also want to smooth m_tempoScratch
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DFProcess* m_RCFConditioning;
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// Config structure for RCFProcess
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DFProcConfig m_RCFPParams;
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};
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#endif
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