diff dsp/tempotracking/TempoTrack.h @ 225:49844bc8a895

* Queen Mary C++ DSP library

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dsp/tempotracking/TempoTrack.h	Wed Apr 05 17:35:59 2006 +0000
@@ -0,0 +1,97 @@
+/* -*- 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 copyright 2005-2006 Christian Landone.
+    All rights reserved.
+*/
+
+#ifndef TEMPOTRACK_H
+#define TEMPOTRACK_H
+
+
+#include <stdio.h>
+#include <vector>
+
+#include "dsp/signalconditioning/DFProcess.h"
+#include "dsp/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<int> process( double* DF, unsigned int length );
+
+	
+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_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;
+};
+
+#endif