source: src/onset/onset.c @ 96a96d7

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 96a96d7 was 96a96d7, checked in by Paul Brossier <piem@piem.org>, 5 years ago

src/onset/onset.h: add aubio_onset_get_silence()

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1/*
2  Copyright (C) 2006-2013 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;        /**< spectral descriptor */
34  aubio_peakpicker_t * pp;      /**< peak picker */
35  cvec_t * fftgrain;            /**< phase vocoder output */
36  fvec_t * desc;                /**< spectral description */
37  smpl_t silence;               /**< silence threhsold */
38  uint_t minioi;                /**< minimum inter onset interval */
39  uint_t delay;                 /**< constant delay, in samples, removed from detected onset times */
40  uint_t samplerate;            /**< sampling rate of the input signal */
41  uint_t hop_size;              /**< number of samples between two runs */
42
43  uint_t total_frames;          /**< total number of frames processed since the beginning */
44  uint_t last_onset;            /**< last detected onset location, in frames */
45};
46
47/* execute onset detection function on iput buffer */
48void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
49{
50  smpl_t isonset = 0;
51  aubio_pvoc_do (o->pv,input, o->fftgrain);
52  aubio_specdesc_do (o->od, o->fftgrain, o->desc);
53  aubio_peakpicker_do(o->pp, o->desc, onset);
54  isonset = onset->data[0];
55  if (isonset > 0.) {
56    if (aubio_silence_detection(input, o->silence)==1) {
57      //AUBIO_DBG ("silent onset, not marking as onset\n");
58      isonset  = 0;
59    } else {
60      uint_t new_onset = o->total_frames + (uint_t)ROUND(isonset * o->hop_size);
61      if (o->last_onset + o->minioi < new_onset) {
62        //AUBIO_DBG ("accepted detection, marking as onset\n");
63        o->last_onset = new_onset;
64      } else {
65        //AUBIO_DBG ("doubled onset, not marking as onset\n");
66        isonset  = 0;
67      }
68    }
69  } else {
70    // we are at the beginning of the file, and we don't find silence
71    if (o->total_frames <= o->delay && o->last_onset < o ->minioi && aubio_silence_detection(input, o->silence) == 0) {
72      //AUBIO_DBG ("beginning of file is not silent, marking as onset\n");
73      isonset = o->delay / o->hop_size;
74      o->last_onset = o->delay;
75    }
76  }
77  onset->data[0] = isonset;
78  o->total_frames += o->hop_size;
79  return;
80}
81
82uint_t aubio_onset_get_last (aubio_onset_t *o)
83{
84  return o->last_onset - o->delay;
85}
86
87smpl_t aubio_onset_get_last_s (aubio_onset_t *o)
88{
89  return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
90}
91
92smpl_t aubio_onset_get_last_ms (aubio_onset_t *o)
93{
94  return aubio_onset_get_last_s (o) * 1000.;
95}
96
97uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
98  o->silence = silence;
99  return AUBIO_OK;
100}
101
102smpl_t aubio_onset_get_silence(aubio_onset_t * o) {
103  return o->silence;
104}
105
106uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
107  aubio_peakpicker_set_threshold(o->pp, threshold);
108  return AUBIO_OK;
109}
110
111smpl_t aubio_onset_get_threshold(aubio_onset_t * o) {
112  return aubio_peakpicker_get_threshold(o->pp);
113}
114
115uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
116  o->minioi = minioi;
117  return AUBIO_OK;
118}
119
120uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
121  return o->minioi;
122}
123
124uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
125  return aubio_onset_set_minioi (o, minioi * o->samplerate);
126}
127
128smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
129  return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
130}
131
132uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
133  return aubio_onset_set_minioi_s (o, minioi / 1000.);
134}
135
136smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
137  return aubio_onset_get_minioi_s (o) * 1000.;
138}
139
140uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
141  o->delay = delay;
142  return AUBIO_OK;
143}
144
145uint_t aubio_onset_get_delay(aubio_onset_t * o) {
146  return o->delay;
147}
148
149uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
150  return aubio_onset_set_delay (o, delay * o->samplerate);
151}
152
153smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
154  return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
155}
156
157uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
158  return aubio_onset_set_delay_s (o, delay / 1000.);
159}
160
161smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
162  return aubio_onset_get_delay_s (o) * 1000.;
163}
164
165smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
166  return o->desc->data[0];
167}
168
169smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
170  fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
171  return thresholded->data[0];
172}
173
174/* Allocate memory for an onset detection */
175aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
176    uint_t buf_size, uint_t hop_size, uint_t samplerate)
177{
178  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
179
180  /* check parameters are valid */
181  if ((sint_t)hop_size < 1) {
182    AUBIO_ERR("onset: got hop_size %d, but can not be < 1\n", hop_size);
183    goto beach;
184  } else if ((sint_t)buf_size < 1) {
185    AUBIO_ERR("onset: got buffer_size %d, but can not be < 1\n", buf_size);
186    goto beach;
187  } else if (buf_size < hop_size) {
188    AUBIO_ERR("onset: hop size (%d) is larger than win size (%d)\n", buf_size, hop_size);
189    goto beach;
190  } else if ((sint_t)samplerate < 1) {
191    AUBIO_ERR("onset: samplerate (%d) can not be < 1\n", samplerate);
192    goto beach;
193  }
194
195  /* store creation parameters */
196  o->samplerate = samplerate;
197  o->hop_size = hop_size;
198
199  /* allocate memory */
200  o->pv = new_aubio_pvoc(buf_size, o->hop_size);
201  o->pp = new_aubio_peakpicker();
202  o->od = new_aubio_specdesc(onset_mode,buf_size);
203  o->fftgrain = new_cvec(buf_size);
204  o->desc = new_fvec(1);
205
206  /* set some default parameter */
207  aubio_onset_set_threshold (o, 0.3);
208  aubio_onset_set_delay(o, 4.3 * hop_size);
209  aubio_onset_set_minioi_ms(o, 20.);
210  aubio_onset_set_silence(o, -70.);
211
212  /* initialize internal variables */
213  o->last_onset = 0;
214  o->total_frames = 0;
215  return o;
216
217beach:
218  AUBIO_FREE(o);
219  return NULL;
220}
221
222void del_aubio_onset (aubio_onset_t *o)
223{
224  del_aubio_specdesc(o->od);
225  del_aubio_peakpicker(o->pp);
226  del_aubio_pvoc(o->pv);
227  del_fvec(o->desc);
228  del_cvec(o->fftgrain);
229  AUBIO_FREE(o);
230}
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