2 Copyright (C) 2006 Paul Brossier
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "aubio_priv.h"
23 #include "onset/onsetdetection.h"
24 #include "spectral/phasevoc.h"
25 #include "onset/peakpick.h"
26 #include "mathutils.h"
27 #include "onset/onset.h"
29 /** structure to store object state */
30 struct _aubio_onset_t {
31 aubio_pvoc_t * pv; /**< phase vocoder */
32 aubio_onsetdetection_t * od; /**< onset detection */
33 aubio_peakpicker_t * pp; /**< peak picker */
34 cvec_t * fftgrain; /**< phase vocoder output */
35 fvec_t * of; /**< onset detection function */
36 smpl_t threshold; /**< onset peak picking threshold */
37 smpl_t silence; /**< silence threhsold */
38 uint_t minioi; /**< minimum inter onset interval */
39 uint_t wasonset; /**< number of frames since last onset */
42 /* execute onset detection function on iput buffer */
43 void aubio_onset(aubio_onset_t *o, fvec_t * input, fvec_t * onset)
46 uint_t wasonset = o->wasonset;
47 aubio_pvoc_do (o->pv,input, o->fftgrain);
48 aubio_onsetdetection(o->od,o->fftgrain, o->of);
50 aubio_onsetdetection(o2,fftgrain, onset2);
51 onset->data[0][0] *= onset2->data[0][0];
53 isonset = aubio_peakpicker_do(o->pp, o->of);
55 if (aubio_silence_detection(input, o->silence)==1) {
59 if (wasonset > o->minioi) {
69 o->wasonset = wasonset;
70 onset->data[0][0] = isonset;
74 void aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
79 void aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
80 o->threshold = threshold;
81 aubio_peakpicker_set_threshold(o->pp, o->threshold);
85 void aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
90 /* Allocate memory for an onset detection */
91 aubio_onset_t * new_aubio_onset (aubio_onsetdetection_type type_onset,
92 uint_t buf_size, uint_t hop_size, uint_t channels)
94 aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
95 /** set some default parameter */
100 o->pv = new_aubio_pvoc(buf_size, hop_size, channels);
101 o->pp = new_aubio_peakpicker(o->threshold);
102 o->od = new_aubio_onsetdetection(type_onset,buf_size,channels);
103 o->fftgrain = new_cvec(buf_size,channels);
104 o->of = new_fvec(1, channels);
106 o2 = new_aubio_onsetdetection(type_onset2,buffer_size,channels);
107 onset2 = new_fvec(1 , channels);
112 void del_aubio_onset (aubio_onset_t *o)
114 del_aubio_onsetdetection(o->od);
115 del_aubio_peakpicker(o->pp);
116 del_aubio_pvoc(o->pv);
118 del_cvec(o->fftgrain);