source: src/onset/onset.c @ b4f5967

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since b4f5967 was b4f5967, checked in by Paul Brossier <piem@piem.org>, 14 years ago

src/onset: use a string to set onset mode, keeping onset types enum private, update everywhere onsets are used

  • Property mode set to 100644
File size: 3.6 KB
Line 
1/*
2   Copyright (C) 2006 Paul Brossier
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18*/
19
20#include "aubio_priv.h"
21#include "fvec.h"
22#include "cvec.h"
23#include "onset/onsetdetection.h"
24#include "spectral/phasevoc.h"
25#include "onset/peakpick.h"
26#include "mathutils.h"
27#include "onset/onset.h"
28
29/** structure to store object state */
30struct _aubio_onset_t {
31  aubio_pvoc_t * pv;            /**< phase vocoder */
32  aubio_onsetdetection_t * od;  /**< onset detection */ 
33  aubio_peakpicker_t * pp;      /**< peak picker */
34  cvec_t * fftgrain;            /**< phase vocoder output */
35  fvec_t * of;                  /**< onset detection function */
36  smpl_t threshold;             /**< onset peak picking threshold */
37  smpl_t silence;               /**< silence threhsold */
38  uint_t minioi;                /**< minimum inter onset interval */
39  uint_t wasonset;              /**< number of frames since last onset */
40};
41
42/* execute onset detection function on iput buffer */
43void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
44{
45  uint_t isonset = 0;
46  uint_t wasonset = o->wasonset;
47  aubio_pvoc_do (o->pv,input, o->fftgrain);
48  aubio_onsetdetection_do (o->od,o->fftgrain, o->of);
49  /*if (usedoubled) {
50    aubio_onsetdetection_do (o2,fftgrain, onset2);
51    onset->data[0][0] *= onset2->data[0][0];
52  }*/
53  isonset = aubio_peakpicker_do(o->pp, o->of);
54  if (isonset > 0.) {
55    if (aubio_silence_detection(input, o->silence)==1) {
56      isonset  = 0;
57      wasonset++;
58    } else {
59      if (wasonset > o->minioi) {
60        wasonset = 0;
61      } else {
62        isonset  = 0;
63        wasonset++;
64      }
65    }
66  } else {
67    wasonset++;
68  }
69  o->wasonset = wasonset;
70  onset->data[0][0] = isonset;
71  return;
72}
73
74void aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
75  o->silence = silence;
76  return;
77}
78
79void aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
80  o->threshold = threshold;
81  aubio_peakpicker_set_threshold(o->pp, o->threshold);
82  return;
83}
84
85void aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
86  o->minioi = minioi;
87  return;
88}
89
90/* Allocate memory for an onset detection */
91aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
92    uint_t buf_size, uint_t hop_size, uint_t channels)
93{
94  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
95  /** set some default parameter */
96  o->threshold = 0.3;
97  o->minioi    = 4;
98  o->silence   = -70;
99  o->wasonset  = 0;
100  o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
101  o->pp = new_aubio_peakpicker(o->threshold);
102  o->od = new_aubio_onsetdetection(onset_mode,buf_size,channels);
103  o->fftgrain = new_cvec(buf_size,channels);
104  o->of = new_fvec(1, channels);
105  /*if (usedoubled)    {
106    o2 = new_aubio_onsetdetection(onset_type2,buffer_size,channels);
107    onset2 = new_fvec(1 , channels);
108  }*/
109  return o;
110}
111
112void del_aubio_onset (aubio_onset_t *o)
113{
114  del_aubio_onsetdetection(o->od);
115  del_aubio_peakpicker(o->pp);
116  del_aubio_pvoc(o->pv);
117  del_fvec(o->of);
118  del_cvec(o->fftgrain);
119  AUBIO_FREE(o);
120}
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