source: src/onset/onset.c @ 763a7f1

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since 763a7f1 was 763a7f1, checked in by Paul Brossier <piem@piem.org>, 5 years ago

src/onset/onset.c: simplify selection of first onset

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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
71    if (o->total_frames <= o->delay) {
72      // and we don't find silence
73      if (aubio_silence_detection(input, o->silence) == 0) {
74        uint_t new_onset = o->total_frames;
75        if (o->total_frames == 0 || o->last_onset + o->minioi < new_onset) {
76          isonset = o->delay / o->hop_size;
77          o->last_onset = o->total_frames + o->delay;
78        }
79      }
80    }
81  }
82  onset->data[0] = isonset;
83  o->total_frames += o->hop_size;
84  return;
85}
86
87uint_t aubio_onset_get_last (aubio_onset_t *o)
88{
89  return o->last_onset - o->delay;
90}
91
92smpl_t aubio_onset_get_last_s (aubio_onset_t *o)
93{
94  return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
95}
96
97smpl_t aubio_onset_get_last_ms (aubio_onset_t *o)
98{
99  return aubio_onset_get_last_s (o) * 1000.;
100}
101
102uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
103  o->silence = silence;
104  return AUBIO_OK;
105}
106
107smpl_t aubio_onset_get_silence(aubio_onset_t * o) {
108  return o->silence;
109}
110
111uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
112  aubio_peakpicker_set_threshold(o->pp, threshold);
113  return AUBIO_OK;
114}
115
116smpl_t aubio_onset_get_threshold(aubio_onset_t * o) {
117  return aubio_peakpicker_get_threshold(o->pp);
118}
119
120uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
121  o->minioi = minioi;
122  return AUBIO_OK;
123}
124
125uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
126  return o->minioi;
127}
128
129uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
130  return aubio_onset_set_minioi (o, minioi * o->samplerate);
131}
132
133smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
134  return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
135}
136
137uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
138  return aubio_onset_set_minioi_s (o, minioi / 1000.);
139}
140
141smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
142  return aubio_onset_get_minioi_s (o) * 1000.;
143}
144
145uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
146  o->delay = delay;
147  return AUBIO_OK;
148}
149
150uint_t aubio_onset_get_delay(aubio_onset_t * o) {
151  return o->delay;
152}
153
154uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
155  return aubio_onset_set_delay (o, delay * o->samplerate);
156}
157
158smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
159  return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
160}
161
162uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
163  return aubio_onset_set_delay_s (o, delay / 1000.);
164}
165
166smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
167  return aubio_onset_get_delay_s (o) * 1000.;
168}
169
170smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
171  return o->desc->data[0];
172}
173
174smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
175  fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
176  return thresholded->data[0];
177}
178
179/* Allocate memory for an onset detection */
180aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
181    uint_t buf_size, uint_t hop_size, uint_t samplerate)
182{
183  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
184
185  /* check parameters are valid */
186  if ((sint_t)hop_size < 1) {
187    AUBIO_ERR("onset: got hop_size %d, but can not be < 1\n", hop_size);
188    goto beach;
189  } else if ((sint_t)buf_size < 1) {
190    AUBIO_ERR("onset: got buffer_size %d, but can not be < 1\n", buf_size);
191    goto beach;
192  } else if (buf_size < hop_size) {
193    AUBIO_ERR("onset: hop size (%d) is larger than win size (%d)\n", buf_size, hop_size);
194    goto beach;
195  } else if ((sint_t)samplerate < 1) {
196    AUBIO_ERR("onset: samplerate (%d) can not be < 1\n", samplerate);
197    goto beach;
198  }
199
200  /* store creation parameters */
201  o->samplerate = samplerate;
202  o->hop_size = hop_size;
203
204  /* allocate memory */
205  o->pv = new_aubio_pvoc(buf_size, o->hop_size);
206  o->pp = new_aubio_peakpicker();
207  o->od = new_aubio_specdesc(onset_mode,buf_size);
208  o->fftgrain = new_cvec(buf_size);
209  o->desc = new_fvec(1);
210
211  /* set some default parameter */
212  aubio_onset_set_threshold (o, 0.3);
213  aubio_onset_set_delay(o, 4.3 * hop_size);
214  aubio_onset_set_minioi_ms(o, 20.);
215  aubio_onset_set_silence(o, -70.);
216
217  /* initialize internal variables */
218  o->last_onset = 0;
219  o->total_frames = 0;
220  return o;
221
222beach:
223  AUBIO_FREE(o);
224  return NULL;
225}
226
227void del_aubio_onset (aubio_onset_t *o)
228{
229  del_aubio_specdesc(o->od);
230  del_aubio_peakpicker(o->pp);
231  del_aubio_pvoc(o->pv);
232  del_fvec(o->desc);
233  del_cvec(o->fftgrain);
234  AUBIO_FREE(o);
235}
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