source: src/onset/onset.c @ 0b9a02a

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 0b9a02a was 0b9a02a, checked in by Paul Brossier <piem@piem.org>, 14 years ago

src/onset: mono

  • Property mode set to 100644
File size: 3.8 KB
Line 
1/*
2  Copyright (C) 2006-2009 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
10
11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
18
19*/
20
21#include "aubio_priv.h"
22#include "fvec.h"
23#include "cvec.h"
24#include "spectral/specdesc.h"
25#include "spectral/phasevoc.h"
26#include "onset/peakpicker.h"
27#include "mathutils.h"
28#include "onset/onset.h"
29
30/** structure to store object state */
31struct _aubio_onset_t {
32  aubio_pvoc_t * pv;            /**< phase vocoder */
33  aubio_specdesc_t * od;  /**< onset detection */ 
34  aubio_peakpicker_t * pp;      /**< peak picker */
35  cvec_t * fftgrain;            /**< phase vocoder output */
36  fvec_t * of;                  /**< onset detection function */
37  smpl_t threshold;             /**< onset peak picking threshold */
38  smpl_t silence;               /**< silence threhsold */
39  uint_t minioi;                /**< minimum inter onset interval */
40  fvec_t * wasonset;            /**< number of frames since last onset */
41  uint_t samplerate;            /**< sampling rate of the input signal */
42  uint_t hop_size;              /**< number of samples between two runs */ 
43};
44
45/* execute onset detection function on iput buffer */
46void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
47{
48  smpl_t isonset = 0;
49  smpl_t wasonset = 0;
50  aubio_pvoc_do (o->pv,input, o->fftgrain);
51  aubio_specdesc_do (o->od,o->fftgrain, o->of);
52  aubio_peakpicker_do(o->pp, o->of, onset);
53  isonset = onset->data[0];
54  wasonset = o->wasonset->data[0];
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->data[0] = wasonset;
71  onset->data[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 = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
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 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  = new_fvec(1);
101  o->samplerate = samplerate;
102  o->hop_size = hop_size;
103  o->pv = new_aubio_pvoc(buf_size, hop_size);
104  o->pp = new_aubio_peakpicker();
105  aubio_peakpicker_set_threshold (o->pp, o->threshold);
106  o->od = new_aubio_specdesc(onset_mode,buf_size);
107  o->fftgrain = new_cvec(buf_size);
108  o->of = new_fvec(1);
109  /*if (usedoubled)    {
110    o2 = new_aubio_specdesc(onset_type2,buffer_size);
111    onset2 = new_fvec(1);
112  }*/
113  return o;
114}
115
116void del_aubio_onset (aubio_onset_t *o)
117{
118  del_aubio_specdesc(o->od);
119  del_aubio_peakpicker(o->pp);
120  del_aubio_pvoc(o->pv);
121  del_fvec(o->of);
122  del_fvec(o->wasonset);
123  del_cvec(o->fftgrain);
124  AUBIO_FREE(o);
125}
Note: See TracBrowser for help on using the repository browser.