2 Copyright (C) 2006-2013 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
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.
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.
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/>.
21 #include "aubio_priv.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"
30 /** structure to store object state */
31 struct _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 */
43 uint_t total_frames; /**< total number of frames processed since the beginning */
44 uint_t last_onset; /**< last detected onset location, in frames */
47 /* execute onset detection function on iput buffer */
48 void aubio_onset_do (aubio_onset_t *o, const fvec_t * input, fvec_t * onset)
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];
56 if (aubio_silence_detection(input, o->silence)==1) {
57 //AUBIO_DBG ("silent onset, not marking as onset\n");
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;
65 //AUBIO_DBG ("doubled onset, not marking as onset\n");
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;
82 onset->data[0] = isonset;
83 o->total_frames += o->hop_size;
87 uint_t aubio_onset_get_last (const aubio_onset_t *o)
89 return o->last_onset - o->delay;
92 smpl_t aubio_onset_get_last_s (const aubio_onset_t *o)
94 return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
97 smpl_t aubio_onset_get_last_ms (const aubio_onset_t *o)
99 return aubio_onset_get_last_s (o) * 1000.;
102 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
103 o->silence = silence;
107 smpl_t aubio_onset_get_silence(const aubio_onset_t * o) {
111 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
112 aubio_peakpicker_set_threshold(o->pp, threshold);
116 smpl_t aubio_onset_get_threshold(const aubio_onset_t * o) {
117 return aubio_peakpicker_get_threshold(o->pp);
120 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
125 uint_t aubio_onset_get_minioi(const aubio_onset_t * o) {
129 uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
130 return aubio_onset_set_minioi (o, minioi * o->samplerate);
133 smpl_t aubio_onset_get_minioi_s(const aubio_onset_t * o) {
134 return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
137 uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
138 return aubio_onset_set_minioi_s (o, minioi / 1000.);
141 smpl_t aubio_onset_get_minioi_ms(const aubio_onset_t * o) {
142 return aubio_onset_get_minioi_s (o) * 1000.;
145 uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
150 uint_t aubio_onset_get_delay(const aubio_onset_t * o) {
154 uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
155 return aubio_onset_set_delay (o, delay * o->samplerate);
158 smpl_t aubio_onset_get_delay_s(const aubio_onset_t * o) {
159 return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
162 uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
163 return aubio_onset_set_delay_s (o, delay / 1000.);
166 smpl_t aubio_onset_get_delay_ms(const aubio_onset_t * o) {
167 return aubio_onset_get_delay_s (o) * 1000.;
170 smpl_t aubio_onset_get_descriptor(const aubio_onset_t * o) {
171 return o->desc->data[0];
174 smpl_t aubio_onset_get_thresholded_descriptor(const aubio_onset_t * o) {
175 fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
176 return thresholded->data[0];
179 /* Allocate memory for an onset detection */
180 aubio_onset_t * new_aubio_onset (const char_t * onset_mode,
181 uint_t buf_size, uint_t hop_size, uint_t samplerate)
183 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
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);
189 } else if ((sint_t)buf_size < 2) {
190 AUBIO_ERR("onset: got buffer_size %d, but can not be < 2\n", buf_size);
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);
195 } else if ((sint_t)samplerate < 1) {
196 AUBIO_ERR("onset: samplerate (%d) can not be < 1\n", samplerate);
200 /* store creation parameters */
201 o->samplerate = samplerate;
202 o->hop_size = hop_size;
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);
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.);
217 /* initialize internal variables */
227 void del_aubio_onset (aubio_onset_t *o)
229 del_aubio_specdesc(o->od);
230 del_aubio_peakpicker(o->pp);
231 del_aubio_pvoc(o->pv);
233 del_cvec(o->fftgrain);