source: src/onset/onset.c @ f5e0a54

feature/autosinkfeature/constantqfeature/pitchshiftfeature/pydocstringsfeature/timestretchpitchshiftsamplertimestretchyinfft+
Last change on this file since f5e0a54 was f5e0a54, checked in by Paul Brossier <piem@piem.org>, 8 years ago

src/onset/onset.c: add get_last_onset

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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 description function */
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  uint_t delay;                 /**< constant delay, in samples, removed from detected onset times */
41  fvec_t * wasonset;            /**< number of blocks since last onset */
42  uint_t samplerate;            /**< sampling rate of the input signal */
43  uint_t hop_size;              /**< number of samples between two runs */
44
45  uint_t total_frames;          /**< total number of frames processed since the beginning */
46  uint_t last_onset;            /**< last detected onset location, in frames */
47};
48
49/* execute onset detection function on iput buffer */
50void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
51{
52  smpl_t isonset = 0;
53  smpl_t wasonset = 0;
54  aubio_pvoc_do (o->pv,input, o->fftgrain);
55  aubio_specdesc_do (o->od,o->fftgrain, o->of);
56  aubio_peakpicker_do(o->pp, o->of, onset);
57  isonset = onset->data[0];
58  wasonset = o->wasonset->data[0];
59  if (isonset > 0.) {
60    if (aubio_silence_detection(input, o->silence)==1) {
61      isonset  = 0;
62      wasonset++;
63    } else {
64      if (wasonset > o->minioi) {
65        wasonset = 0;
66        o->last_onset = o->total_frames + isonset * o->hop_size;
67      } else {
68        isonset  = 0;
69        wasonset++;
70      }
71    }
72  } else {
73    if (wasonset == -1 && aubio_silence_detection(input, o->silence) == 0) {
74      //AUBIO_MSG("beginning of file is not silent, marking as onset\n",
75      //  wasonset, aubio_silence_detection(input, o->silence));
76      isonset = o->delay / o->hop_size;
77      o->last_onset = o->delay;
78      wasonset = 0;
79    }
80    wasonset++;
81  }
82  o->wasonset->data[0] = wasonset;
83  //onset->data[0] = isonset * o->hop_size - o->delay;
84  onset->data[0] = isonset;
85  // also keep a copy of the offset for use in get_last_onset
86  o->total_frames += o->hop_size;
87  return;
88}
89
90smpl_t aubio_onset_get_last_onset (aubio_onset_t *o)
91{
92  return o->last_onset - o->delay;
93}
94
95smpl_t aubio_onset_get_last_onset_s (aubio_onset_t *o)
96{
97  return aubio_onset_get_last_onset (o) / (smpl_t) (o->samplerate);
98}
99
100smpl_t aubio_onset_get_last_onset_ms (aubio_onset_t *o)
101{
102  return aubio_onset_get_last_onset_s (o) / 1000.;
103}
104
105smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
106  return o->of->data[0];
107}
108
109smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
110  fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
111  return thresholded->data[0];
112}
113
114uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
115  o->silence = silence;
116  return AUBIO_OK;
117}
118
119uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
120  o->threshold = threshold;
121  aubio_peakpicker_set_threshold(o->pp, o->threshold);
122  return AUBIO_OK;
123}
124
125uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
126  o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
127  return AUBIO_OK;
128}
129
130uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
131  return o->minioi;
132}
133
134uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
135  o->delay = delay;
136  return AUBIO_OK;
137}
138
139uint_t aubio_onset_get_delay(aubio_onset_t * o) {
140  return o->delay;
141}
142
143uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
144  return aubio_onset_set_delay (o, delay * o->samplerate);
145}
146
147smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
148  return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
149}
150
151uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
152  return aubio_onset_set_delay_s (o, delay / 1000.);
153}
154
155smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
156  return aubio_onset_get_delay_s (o) * 1000.;
157}
158
159/* Allocate memory for an onset detection */
160aubio_onset_t * new_aubio_onset (char_t * onset_mode, 
161    uint_t buf_size, uint_t hop_size, uint_t samplerate)
162{
163  aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
164  /** set some default parameter */
165  o->last_onset = 0;
166  o->threshold = 0.3;
167  o->delay     = 4.3 * hop_size;
168  o->minioi    = 5;
169  o->silence   = -70;
170  o->wasonset  = new_fvec(1);
171  o->wasonset->data[0] = -1.;
172  o->total_frames = 0;
173  o->samplerate = samplerate;
174  o->hop_size = hop_size;
175  o->pv = new_aubio_pvoc(buf_size, hop_size);
176  o->pp = new_aubio_peakpicker();
177  aubio_peakpicker_set_threshold (o->pp, o->threshold);
178  o->od = new_aubio_specdesc(onset_mode,buf_size);
179  o->fftgrain = new_cvec(buf_size);
180  o->of = new_fvec(1);
181  /*if (usedoubled)    {
182    o2 = new_aubio_specdesc(onset_type2,buffer_size);
183    onset2 = new_fvec(1);
184  }*/
185  return o;
186}
187
188void del_aubio_onset (aubio_onset_t *o)
189{
190  del_aubio_specdesc(o->od);
191  del_aubio_peakpicker(o->pp);
192  del_aubio_pvoc(o->pv);
193  del_fvec(o->of);
194  del_fvec(o->wasonset);
195  del_cvec(o->fftgrain);
196  AUBIO_FREE(o);
197}
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