source: src/onset/onset.c @ 7778f39

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 7778f39 was e4f142c, checked in by Paul Brossier <piem@piem.org>, 15 years ago

src/onset/: use samplerate

  • Property mode set to 100644
File size: 3.7 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  uint_t samplerate;            /**< sampling rate of the input signal */
41};
42
43/* execute onset detection function on iput buffer */
44void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
45{
46  uint_t isonset = 0;
47  uint_t wasonset = o->wasonset;
48  aubio_pvoc_do (o->pv,input, o->fftgrain);
49  aubio_onsetdetection_do (o->od,o->fftgrain, o->of);
50  /*if (usedoubled) {
51    aubio_onsetdetection_do (o2,fftgrain, onset2);
52    onset->data[0][0] *= onset2->data[0][0];
53  }*/
54  isonset = aubio_peakpicker_do(o->pp, o->of);
55  if (isonset > 0.) {
56    if (aubio_silence_detection(input, o->silence)==1) {
57      isonset  = 0;
58      wasonset++;
59    } else {
60      if (wasonset > o->minioi) {
61        wasonset = 0;
62      } else {
63        isonset  = 0;
64        wasonset++;
65      }
66    }
67  } else {
68    wasonset++;
69  }
70  o->wasonset = wasonset;
71  onset->data[0][0] = isonset;
72  return;
73}
74
75uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
76  o->silence = silence;
77  return AUBIO_OK;
78}
79
80uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
81  o->threshold = threshold;
82  aubio_peakpicker_set_threshold(o->pp, o->threshold);
83  return AUBIO_OK;
84}
85
86uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
87  o->minioi = minioi;
88  return AUBIO_OK;
89}
90
91/* Allocate memory for an onset detection */
92aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
93    uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate)
94{
95  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
96  /** set some default parameter */
97  o->threshold = 0.3;
98  o->minioi    = 4;
99  o->silence   = -70;
100  o->wasonset  = 0;
101  o->samplerate = samplerate;
102  o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
103  o->pp = new_aubio_peakpicker(o->threshold);
104  o->od = new_aubio_onsetdetection(onset_mode,buf_size,channels);
105  o->fftgrain = new_cvec(buf_size,channels);
106  o->of = new_fvec(1, channels);
107  /*if (usedoubled)    {
108    o2 = new_aubio_onsetdetection(onset_type2,buffer_size,channels);
109    onset2 = new_fvec(1 , channels);
110  }*/
111  return o;
112}
113
114void del_aubio_onset (aubio_onset_t *o)
115{
116  del_aubio_onsetdetection(o->od);
117  del_aubio_peakpicker(o->pp);
118  del_aubio_pvoc(o->pv);
119  del_fvec(o->of);
120  del_cvec(o->fftgrain);
121  AUBIO_FREE(o);
122}
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