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1 /* -*- c-basic-offset: 4 indent-tabs-mode: nil -*- vi:set ts=8 sts=4 sw=4: */
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2
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3 /*
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4 QM DSP Library
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5
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6 Centre for Digital Music, Queen Mary, University of London.
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7 This file copyright 2005-2006 Christian Landone.
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8 All rights reserved.
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9 */
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10
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11 #ifndef TEMPOTRACK_H
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12 #define TEMPOTRACK_H
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13
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14
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15 #include <stdio.h>
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16 #include <vector>
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17
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18 #include "dsp/signalconditioning/DFProcess.h"
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19 #include "maths/Correlation.h"
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20 #include "dsp/signalconditioning/Framer.h"
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21
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22
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23
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24 using std::vector;
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25
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26 struct WinThresh
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27 {
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28 unsigned int pre;
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29 unsigned int post;
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30 };
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31
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32 struct TTParams
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33 {
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34 unsigned int winLength; //Analysis window length
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35 unsigned int lagLength; //Lag & Stride size
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36 unsigned int alpha; //alpha-norm parameter
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37 unsigned int LPOrd; // low-pass Filter order
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38 double* LPACoeffs; //low pass Filter den coefficients
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39 double* LPBCoeffs; //low pass Filter num coefficients
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40 WinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
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41 };
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42
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43
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44 class TempoTrack
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45 {
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46 public:
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47 TempoTrack( TTParams Params );
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48 virtual ~TempoTrack();
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49
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50 vector<int> process( vector <double> DF, vector <double> *tempoReturn = 0);
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51 vector<int> process( double* DF, unsigned int length );
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52
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53
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54 private:
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55 void initialise( TTParams Params );
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56 void deInitialise();
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57
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58 int beatPredict( unsigned int FSP, double alignment, double period, unsigned int step);
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59 int phaseMM( double* DF, double* weighting, unsigned int winLength, double period );
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60 void createPhaseExtractor( double* Filter, unsigned int winLength, double period, unsigned int fsp, unsigned int lastBeat );
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61 int findMeter( double* ACF, unsigned int len, double period );
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62 void constDetect( double* periodP, int currentIdx, int* flag );
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63 void stepDetect( double* periodP, double* periodG, int currentIdx, int* flag );
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64 void createCombFilter( double* Filter, unsigned int winLength, unsigned int TSig, double beatLag );
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65 double tempoMM( double* ACF, double* weight, int sig );
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66
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67 unsigned int m_dataLength;
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68 unsigned int m_winLength;
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69 unsigned int m_lagLength;
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70
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71 double m_rayparam;
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72 double m_sigma;
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73 double m_DFWVNnorm;
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74
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75 vector<int> m_beats; // Vector of detected beats
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76
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77 double m_lockedTempo;
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78
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79 double* m_tempoScratch;
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80
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81 // Processing Buffers
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82 double* m_rawDFFrame; // Original Detection Function Analysis Frame
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83 double* m_smoothDFFrame; // Smoothed Detection Function Analysis Frame
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84 double* m_frameACF; // AutoCorrelation of Smoothed Detection Function
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85
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86 //Low Pass Coefficients for DF Smoothing
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87 double* m_ACoeffs;
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88 double* m_BCoeffs;
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89
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90 // Objetcs/operators declaration
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91 Framer m_DFFramer;
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92 DFProcess* m_DFConditioning;
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93 Correlation m_correlator;
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94
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95 // Config structure for DFProcess
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96 DFProcConfig m_DFPParams;
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97 };
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98
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99 #endif
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