1 | /* |
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2 | Copyright (C) 2006 Paul Brossier |
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3 | |
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4 | This program is free software; you can redistribute it and/or modify |
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5 | it under the terms of the GNU General Public License as published by |
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6 | the Free Software Foundation; either version 2 of the License, or |
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7 | (at your option) any later version. |
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8 | |
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9 | This program is distributed in the hope that it will be useful, |
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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12 | GNU General Public License for more details. |
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13 | |
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14 | You should have received a copy of the GNU General Public License |
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15 | along with this program; if not, write to the Free Software |
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16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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17 | |
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18 | */ |
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19 | |
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20 | #include "aubio_priv.h" |
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21 | #include "fvec.h" |
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22 | #include "cvec.h" |
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23 | #include "onset/onsetdetection.h" |
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24 | #include "spectral/phasevoc.h" |
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25 | #include "onset/peakpick.h" |
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26 | #include "mathutils.h" |
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27 | #include "onset/onset.h" |
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28 | |
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29 | /** structure to store object state */ |
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30 | struct _aubio_onset_t { |
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31 | aubio_pvoc_t * pv; /**< phase vocoder */ |
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32 | aubio_onsetdetection_t * od; /**< onset detection */ |
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33 | aubio_peakpicker_t * pp; /**< peak picker */ |
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34 | cvec_t * fftgrain; /**< phase vocoder output */ |
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35 | fvec_t * of; /**< onset detection function */ |
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36 | smpl_t threshold; /**< onset peak picking threshold */ |
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37 | smpl_t silence; /**< silence threhsold */ |
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38 | uint_t minioi; /**< minimum inter onset interval */ |
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39 | uint_t wasonset; /**< number of frames since last onset */ |
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40 | uint_t samplerate; /**< sampling rate of the input signal */ |
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41 | }; |
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42 | |
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43 | /* execute onset detection function on iput buffer */ |
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44 | void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset) |
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45 | { |
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46 | uint_t isonset = 0; |
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47 | uint_t wasonset = o->wasonset; |
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48 | aubio_pvoc_do (o->pv,input, o->fftgrain); |
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49 | aubio_onsetdetection_do (o->od,o->fftgrain, o->of); |
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50 | /*if (usedoubled) { |
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51 | aubio_onsetdetection_do (o2,fftgrain, onset2); |
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52 | onset->data[0][0] *= onset2->data[0][0]; |
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53 | }*/ |
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54 | isonset = aubio_peakpicker_do(o->pp, o->of); |
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55 | if (isonset > 0.) { |
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56 | if (aubio_silence_detection(input, o->silence)==1) { |
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57 | isonset = 0; |
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58 | wasonset++; |
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59 | } else { |
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60 | if (wasonset > o->minioi) { |
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61 | wasonset = 0; |
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62 | } else { |
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63 | isonset = 0; |
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64 | wasonset++; |
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65 | } |
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66 | } |
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67 | } else { |
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68 | wasonset++; |
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69 | } |
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70 | o->wasonset = wasonset; |
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71 | onset->data[0][0] = isonset; |
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72 | return; |
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73 | } |
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74 | |
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75 | uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) { |
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76 | o->silence = silence; |
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77 | return AUBIO_OK; |
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78 | } |
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79 | |
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80 | uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) { |
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81 | o->threshold = threshold; |
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82 | aubio_peakpicker_set_threshold(o->pp, o->threshold); |
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83 | return AUBIO_OK; |
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84 | } |
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85 | |
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86 | uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) { |
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87 | o->minioi = minioi; |
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88 | return AUBIO_OK; |
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89 | } |
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90 | |
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91 | /* Allocate memory for an onset detection */ |
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92 | aubio_onset_t * new_aubio_onset (char_t * onset_mode, |
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93 | uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate) |
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94 | { |
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95 | aubio_onset_t * o = AUBIO_NEW(aubio_onset_t); |
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96 | /** set some default parameter */ |
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97 | o->threshold = 0.3; |
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98 | o->minioi = 4; |
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99 | o->silence = -70; |
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100 | o->wasonset = 0; |
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101 | o->samplerate = samplerate; |
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102 | o->pv = new_aubio_pvoc(buf_size, hop_size, channels); |
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103 | o->pp = new_aubio_peakpicker(o->threshold); |
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104 | o->od = new_aubio_onsetdetection(onset_mode,buf_size,channels); |
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105 | o->fftgrain = new_cvec(buf_size,channels); |
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106 | o->of = new_fvec(1, channels); |
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107 | /*if (usedoubled) { |
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108 | o2 = new_aubio_onsetdetection(onset_type2,buffer_size,channels); |
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109 | onset2 = new_fvec(1 , channels); |
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110 | }*/ |
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111 | return o; |
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112 | } |
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113 | |
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114 | void del_aubio_onset (aubio_onset_t *o) |
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115 | { |
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116 | del_aubio_onsetdetection(o->od); |
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117 | del_aubio_peakpicker(o->pp); |
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118 | del_aubio_pvoc(o->pv); |
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119 | del_fvec(o->of); |
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120 | del_cvec(o->fftgrain); |
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121 | AUBIO_FREE(o); |
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122 | } |
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