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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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mathieu@321
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9 Modifications:
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10
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11 - delta threshold
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12 Description: add delta threshold used as offset in the smoothed
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13 detection function
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14 Author: Mathieu Barthet
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15 Date: June 2010
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16
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17 This program is free software; you can redistribute it and/or
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18 modify it under the terms of the GNU General Public License as
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19 published by the Free Software Foundation; either version 2 of the
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20 License, or (at your option) any later version. See the file
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21 COPYING included with this distribution for more information.
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22 */
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23
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cannam@489
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24 #ifndef QM_DSP_DFPROCESS_H
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25 #define QM_DSP_DFPROCESS_H
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26
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27 #include <stdio.h>
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28 #include "FiltFilt.h"
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29
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30 struct DFProcConfig{
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31 unsigned int length;
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32 unsigned int LPOrd;
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33 double *LPACoeffs;
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34 double *LPBCoeffs;
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35 unsigned int winPre;
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36 unsigned int winPost;
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37 double AlphaNormParam;
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38 bool isMedianPositive;
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39 float delta; //delta threshold used as an offset when computing the smoothed detection function
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40
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41 DFProcConfig() :
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42 length(0),
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43 LPOrd(0),
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44 LPACoeffs(NULL),
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45 LPBCoeffs(NULL),
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46 winPre(0),
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47 winPost(0),
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48 AlphaNormParam(0),
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49 isMedianPositive(false),
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50 delta(0)
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51 {
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52 }
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53 };
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54
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55 class DFProcess
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56 {
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57 public:
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58 DFProcess( DFProcConfig Config );
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59 virtual ~DFProcess();
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60
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61 void process( double* src, double* dst );
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62
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63 private:
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64 void initialise( DFProcConfig Config );
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65 void deInitialise();
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66 void removeDCNormalize( double *src, double*dst );
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67 void medianFilter( double* src, double* dst );
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68
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69 int m_length;
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70 int m_FFOrd;
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71
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72 int m_winPre;
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73 int m_winPost;
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74
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75 double m_alphaNormParam;
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76
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77 double* filtSrc;
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78 double* filtDst;
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79
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80 double* m_filtScratchIn;
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81 double* m_filtScratchOut;
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82
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83 FiltFilt* m_FiltFilt;
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84
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85 bool m_isMedianPositive;
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86 float m_delta; //add delta threshold
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87 };
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88
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89 #endif
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