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/peakpick.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 detection */
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 fvec_t * wasonset; /**< number of frames since last onset */
41 uint_t samplerate; /**< sampling rate of the input signal */
44 /* execute onset detection function on iput buffer */
45 void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
50 aubio_pvoc_do (o->pv,input, o->fftgrain);
51 aubio_specdesc_do (o->od,o->fftgrain, o->of);
53 aubio_specdesc_do (o2,fftgrain, onset2);
54 onset->data[0][0] *= onset2->data[0][0];
56 aubio_peakpicker_do(o->pp, o->of, onset);
57 for (i = 0; i < input->channels; i++) {
58 isonset = onset->data[i][0];
59 wasonset = o->wasonset->data[i][0];
61 if (aubio_silence_detection(input, o->silence)==1) {
65 if (wasonset > o->minioi) {
75 o->wasonset->data[i][0] = wasonset;
76 onset->data[i][0] = isonset;
81 uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
86 uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
87 o->threshold = threshold;
88 aubio_peakpicker_set_threshold(o->pp, o->threshold);
92 uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
93 o->minioi = FLOOR(minioi / 1000. * o->samplerate / o->hop_size);
97 /* Allocate memory for an onset detection */
98 aubio_onset_t * new_aubio_onset (char_t * onset_mode,
99 uint_t buf_size, uint_t hop_size, uint_t channels, uint_t samplerate)
101 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
102 /** set some default parameter */
106 o->wasonset = new_fvec(1, channels);
107 o->samplerate = samplerate;
108 o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
109 o->pp = new_aubio_peakpicker(channels);
110 aubio_peakpicker_set_threshold (o->pp, o->threshold);
111 o->od = new_aubio_specdesc(onset_mode,buf_size,channels);
112 o->fftgrain = new_cvec(buf_size,channels);
113 o->of = new_fvec(1, channels);
115 o2 = new_aubio_specdesc(onset_type2,buffer_size,channels);
116 onset2 = new_fvec(1 , channels);
121 void del_aubio_onset (aubio_onset_t *o)
123 del_aubio_specdesc(o->od);
124 del_aubio_peakpicker(o->pp);
125 del_aubio_pvoc(o->pv);
127 del_fvec(o->wasonset);
128 del_cvec(o->fftgrain);