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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 // PeakPicking.h: interface for the PeakPicking class.
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12 //
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13 //////////////////////////////////////////////////////////////////////
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14
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15 #ifndef PEAKPICKING_H
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16 #define PEAKPICKING_H
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17
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18 #include "maths/MathUtilities.h"
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19 #include "maths/MathAliases.h"
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20 #include "dsp/signalconditioning/DFProcess.h"
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21
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22
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23 struct PPWinThresh
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24 {
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25 unsigned int pre;
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26 unsigned int post;
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27 };
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28
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29 struct QFitThresh
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30 {
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31 double a;
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32 double b;
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33 double c;
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34 };
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35
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36 struct PPickParams
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37 {
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38 unsigned int length; //Detection FunctionLength
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39 double tau; // time resolution of the detection function:
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40 unsigned int alpha; //alpha-norm parameter
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41 double cutoff;//low-pass Filter cutoff freq
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42 unsigned int LPOrd; // low-pass Filter order
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43 double* LPACoeffs; //low pass Filter den coefficients
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44 double* LPBCoeffs; //low pass Filter num coefficients
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45 PPWinThresh WinT;//window size in frames for adaptive thresholding [pre post]:
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46 QFitThresh QuadThresh;
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47 };
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48
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49 class PeakPicking
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50 {
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51 public:
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52 PeakPicking( PPickParams Config );
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53 virtual ~PeakPicking();
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54
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55 void process( double* src, unsigned int len, vector<int> &onsets );
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56
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57
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58 private:
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59 void initialise( PPickParams Config );
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60 void deInitialise();
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61 int quadEval( vector<double> &src, vector<int> &idx );
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62
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63 DFProcConfig m_DFProcessingParams;
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64
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65 unsigned int m_DFLength ;
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66 double Qfilta ;
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67 double Qfiltb;
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68 double Qfiltc;
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69
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70
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71 double* m_workBuffer;
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72
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73 DFProcess* m_DFSmoothing;
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74 };
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75
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76 #endif
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