2 Copyright (C) 2006-2009 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; /**< 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 uint_t samplerate; /**< sampling rate of the input signal */
42 uint_t hop_size; /**< number of samples between two runs */
44 uint_t total_frames; /**< total number of frames processed since the beginning */
45 uint_t last_onset; /**< last detected onset location, in frames */
48 /* execute onset detection function on iput buffer */
49 void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
52 aubio_pvoc_do (o->pv,input, o->fftgrain);
53 aubio_specdesc_do (o->od,o->fftgrain, o->of);
54 aubio_peakpicker_do(o->pp, o->of, onset);
55 isonset = onset->data[0];
57 if (aubio_silence_detection(input, o->silence)==1) {
60 uint_t new_onset = o->total_frames + isonset * o->hop_size;
61 if (o->last_onset + o->minioi < new_onset) {
62 o->last_onset = new_onset;
68 // we are at the beginning of the file, and we don't find silence
69 if (o->total_frames == 0 && aubio_silence_detection(input, o->silence) == 0) {
70 //AUBIO_DBG ("beginning of file is not silent, marking as onset\n");
71 isonset = o->delay / o->hop_size;
72 o->last_onset = o->delay;
75 onset->data[0] = isonset;
76 o->total_frames += o->hop_size;
80 smpl_t aubio_onset_get_last_onset (aubio_onset_t *o)
82 return o->last_onset - o->delay;
85 smpl_t aubio_onset_get_last_onset_s (aubio_onset_t *o)
87 return aubio_onset_get_last_onset (o) / (smpl_t) (o->samplerate);
90 smpl_t aubio_onset_get_last_onset_ms (aubio_onset_t *o)
92 return aubio_onset_get_last_onset_s (o) / 1000.;
95 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
100 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
101 o->threshold = threshold;
102 aubio_peakpicker_set_threshold(o->pp, o->threshold);
106 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
111 uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
115 uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
116 return aubio_onset_set_minioi (o, minioi * o->samplerate);
119 smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
120 return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
123 uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
124 return aubio_onset_set_minioi_s (o, minioi / 1000.);
127 smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
128 return aubio_onset_get_minioi_s (o) * 1000.;
131 uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
136 uint_t aubio_onset_get_delay(aubio_onset_t * o) {
140 uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
141 return aubio_onset_set_delay (o, delay * o->samplerate);
144 smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
145 return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
148 uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
149 return aubio_onset_set_delay_s (o, delay / 1000.);
152 smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
153 return aubio_onset_get_delay_s (o) * 1000.;
156 smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
157 return o->of->data[0];
160 smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
161 fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
162 return thresholded->data[0];
165 /* Allocate memory for an onset detection */
166 aubio_onset_t * new_aubio_onset (char_t * onset_mode,
167 uint_t buf_size, uint_t hop_size, uint_t samplerate)
169 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
170 /** set some default parameter */
171 o->samplerate = samplerate;
172 o->hop_size = hop_size;
175 o->delay = 4.3 * hop_size;
176 o->minioi = 5 * hop_size;
179 o->pv = new_aubio_pvoc(buf_size, o->hop_size);
180 o->pp = new_aubio_peakpicker();
181 aubio_peakpicker_set_threshold (o->pp, o->threshold);
182 o->od = new_aubio_specdesc(onset_mode,buf_size);
183 o->fftgrain = new_cvec(buf_size);
188 void del_aubio_onset (aubio_onset_t *o)
190 del_aubio_specdesc(o->od);
191 del_aubio_peakpicker(o->pp);
192 del_aubio_pvoc(o->pv);
194 del_cvec(o->fftgrain);