diff options
| author | Paul Davis <paul@linuxaudiosystems.com> | 2011-03-02 12:37:39 +0000 |
|---|---|---|
| committer | Paul Davis <paul@linuxaudiosystems.com> | 2011-03-02 12:37:39 +0000 |
| commit | 3deba1921bcf5bddd8bea9846a203c92b6c9239d (patch) | |
| tree | 8b2e00405337396918ff28e282df14e958b84bb9 /libs/qm-dsp/dsp/tempotracking/TempoTrack.h | |
| parent | fa41cfef580b2c8c04adec5b47d6cfa415ca6251 (diff) | |
add queen mary DSP library
git-svn-id: svn://localhost/ardour2/branches/3.0@9029 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/qm-dsp/dsp/tempotracking/TempoTrack.h')
| -rw-r--r-- | libs/qm-dsp/dsp/tempotracking/TempoTrack.h | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/libs/qm-dsp/dsp/tempotracking/TempoTrack.h b/libs/qm-dsp/dsp/tempotracking/TempoTrack.h new file mode 100644 index 0000000000..12eb977cd5 --- /dev/null +++ b/libs/qm-dsp/dsp/tempotracking/TempoTrack.h @@ -0,0 +1,111 @@ +/* -*- 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.
+*/
+
+#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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