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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 "FiltFilt.h"
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28
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29 #include <stdio.h>
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30
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31 struct DFProcConfig
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32 {
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33 int length;
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34 int LPOrd;
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35 double *LPACoeffs;
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36 double *LPBCoeffs;
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37 int winPre;
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38 int winPost;
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39 double AlphaNormParam;
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40 bool isMedianPositive;
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41 float delta; //delta threshold used as an offset when computing the smoothed detection function
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42
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43 DFProcConfig() :
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44 length(0),
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45 LPOrd(0),
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46 LPACoeffs(NULL),
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47 LPBCoeffs(NULL),
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48 winPre(0),
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49 winPost(0),
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50 AlphaNormParam(0),
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51 isMedianPositive(false),
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52 delta(0)
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53 {
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54 }
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55 };
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56
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57 class DFProcess
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58 {
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59 public:
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60 DFProcess( DFProcConfig Config );
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61 virtual ~DFProcess();
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62
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63 void process( double* src, double* dst );
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64
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65 private:
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66 void initialise( DFProcConfig Config );
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67 void deInitialise();
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68 void removeDCNormalize( double *src, double*dst );
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69 void medianFilter( double* src, double* dst );
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70
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71 int m_length;
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72 int m_FFOrd;
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73
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74 int m_winPre;
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75 int m_winPost;
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76
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77 double m_alphaNormParam;
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78
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79 double* filtSrc;
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80 double* filtDst;
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81
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82 double* m_filtScratchIn;
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83 double* m_filtScratchOut;
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84
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85 FiltFilt* m_FiltFilt;
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86
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87 bool m_isMedianPositive;
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88 float m_delta; //add delta threshold
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89 };
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90
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91 #endif
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