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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 2005-2006 Christian Landone.
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8
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9 This program is free software; you can redistribute it and/or
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10 modify it under the terms of the GNU General Public License as
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11 published by the Free Software Foundation; either version 2 of the
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12 License, or (at your option) any later version. See the file
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13 COPYING included with this distribution for more information.
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14 */
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15
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16 // PeakPicking.h: interface for the PeakPicking class.
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17 //
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18 //////////////////////////////////////////////////////////////////////
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19
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20 #ifndef PEAKPICKING_H
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21 #define PEAKPICKING_H
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22
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23 #include "maths/MathUtilities.h"
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24 #include "maths/MathAliases.h"
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25 #include "dsp/signalconditioning/DFProcess.h"
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26
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27
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28 struct PPWinThresh
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29 {
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30 unsigned int pre;
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31 unsigned int post;
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32 };
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33
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34 struct QFitThresh
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35 {
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36 double a;
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37 double b;
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38 double c;
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39 };
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40
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41 struct PPickParams
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42 {
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43 unsigned int length; //Detection FunctionLength
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44 double tau; // time resolution of the detection function:
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45 unsigned int alpha; //alpha-norm parameter
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46 double cutoff;//low-pass Filter cutoff freq
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47 unsigned int LPOrd; // low-pass Filter order
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48 double* LPACoeffs; //low pass Filter den coefficients
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49 double* LPBCoeffs; //low pass Filter num coefficients
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50 PPWinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
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51 QFitThresh QuadThresh;
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52 };
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53
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54 class PeakPicking
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55 {
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56 public:
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57 PeakPicking( PPickParams Config );
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58 virtual ~PeakPicking();
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59
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60 void process( double* src, unsigned int len, vector<int> &onsets );
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61
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62
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63 private:
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64 void initialise( PPickParams Config );
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65 void deInitialise();
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66 int quadEval( vector<double> &src, vector<int> &idx );
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67
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68 DFProcConfig m_DFProcessingParams;
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69
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70 unsigned int m_DFLength ;
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71 double Qfilta ;
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72 double Qfiltb;
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73 double Qfiltc;
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74
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75
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76 double* m_workBuffer;
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77
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78 DFProcess* m_DFSmoothing;
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79 };
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80
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81 #endif
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