ref: fb5838a58b55433e51753b2a82f59eb22d792fdd
dir: /src/onset/onset.c/
/*
Copyright (C) 2006-2013 Paul Brossier <piem@aubio.org>
This file is part of aubio.
aubio is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
aubio is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with aubio. If not, see <http://www.gnu.org/licenses/>.
*/
#include "aubio_priv.h"
#include "fvec.h"
#include "cvec.h"
#include "spectral/specdesc.h"
#include "spectral/phasevoc.h"
#include "onset/peakpicker.h"
#include "mathutils.h"
#include "onset/onset.h"
/** structure to store object state */
struct _aubio_onset_t {
aubio_pvoc_t * pv; /**< phase vocoder */
aubio_specdesc_t * od; /**< spectral descriptor */
aubio_peakpicker_t * pp; /**< peak picker */
cvec_t * fftgrain; /**< phase vocoder output */
fvec_t * desc; /**< spectral description */
smpl_t silence; /**< silence threhsold */
uint_t minioi; /**< minimum inter onset interval */
uint_t delay; /**< constant delay, in samples, removed from detected onset times */
uint_t samplerate; /**< sampling rate of the input signal */
uint_t hop_size; /**< number of samples between two runs */
uint_t total_frames; /**< total number of frames processed since the beginning */
uint_t last_onset; /**< last detected onset location, in frames */
};
/* execute onset detection function on iput buffer */
void aubio_onset_do (aubio_onset_t *o, fvec_t * input, fvec_t * onset)
{
smpl_t isonset = 0;
aubio_pvoc_do (o->pv,input, o->fftgrain);
aubio_specdesc_do (o->od, o->fftgrain, o->desc);
aubio_peakpicker_do(o->pp, o->desc, onset);
isonset = onset->data[0];
if (isonset > 0.) {
if (aubio_silence_detection(input, o->silence)==1) {
//AUBIO_DBG ("silent onset, not marking as onset\n");
isonset = 0;
} else {
uint_t new_onset = o->total_frames + (uint_t)ROUND(isonset * o->hop_size);
if (o->last_onset + o->minioi < new_onset) {
//AUBIO_DBG ("accepted detection, marking as onset\n");
o->last_onset = new_onset;
} else {
//AUBIO_DBG ("doubled onset, not marking as onset\n");
isonset = 0;
}
}
} else {
// we are at the beginning of the file
if (o->total_frames <= o->delay) {
// and we don't find silence
if (aubio_silence_detection(input, o->silence) == 0) {
uint_t new_onset = o->total_frames;
if (o->total_frames == 0 || o->last_onset + o->minioi < new_onset) {
isonset = o->delay / o->hop_size;
o->last_onset = o->total_frames + o->delay;
}
}
}
}
onset->data[0] = isonset;
o->total_frames += o->hop_size;
return;
}
uint_t aubio_onset_get_last (aubio_onset_t *o)
{
return o->last_onset - o->delay;
}
smpl_t aubio_onset_get_last_s (aubio_onset_t *o)
{
return aubio_onset_get_last (o) / (smpl_t) (o->samplerate);
}
smpl_t aubio_onset_get_last_ms (aubio_onset_t *o)
{
return aubio_onset_get_last_s (o) * 1000.;
}
uint_t aubio_onset_set_silence(aubio_onset_t * o, smpl_t silence) {
o->silence = silence;
return AUBIO_OK;
}
smpl_t aubio_onset_get_silence(aubio_onset_t * o) {
return o->silence;
}
uint_t aubio_onset_set_threshold(aubio_onset_t * o, smpl_t threshold) {
aubio_peakpicker_set_threshold(o->pp, threshold);
return AUBIO_OK;
}
smpl_t aubio_onset_get_threshold(aubio_onset_t * o) {
return aubio_peakpicker_get_threshold(o->pp);
}
uint_t aubio_onset_set_minioi(aubio_onset_t * o, uint_t minioi) {
o->minioi = minioi;
return AUBIO_OK;
}
uint_t aubio_onset_get_minioi(aubio_onset_t * o) {
return o->minioi;
}
uint_t aubio_onset_set_minioi_s(aubio_onset_t * o, smpl_t minioi) {
return aubio_onset_set_minioi (o, minioi * o->samplerate);
}
smpl_t aubio_onset_get_minioi_s(aubio_onset_t * o) {
return aubio_onset_get_minioi (o) / (smpl_t) o->samplerate;
}
uint_t aubio_onset_set_minioi_ms(aubio_onset_t * o, smpl_t minioi) {
return aubio_onset_set_minioi_s (o, minioi / 1000.);
}
smpl_t aubio_onset_get_minioi_ms(aubio_onset_t * o) {
return aubio_onset_get_minioi_s (o) * 1000.;
}
uint_t aubio_onset_set_delay(aubio_onset_t * o, uint_t delay) {
o->delay = delay;
return AUBIO_OK;
}
uint_t aubio_onset_get_delay(aubio_onset_t * o) {
return o->delay;
}
uint_t aubio_onset_set_delay_s(aubio_onset_t * o, smpl_t delay) {
return aubio_onset_set_delay (o, delay * o->samplerate);
}
smpl_t aubio_onset_get_delay_s(aubio_onset_t * o) {
return aubio_onset_get_delay (o) / (smpl_t) o->samplerate;
}
uint_t aubio_onset_set_delay_ms(aubio_onset_t * o, smpl_t delay) {
return aubio_onset_set_delay_s (o, delay / 1000.);
}
smpl_t aubio_onset_get_delay_ms(aubio_onset_t * o) {
return aubio_onset_get_delay_s (o) * 1000.;
}
smpl_t aubio_onset_get_descriptor(aubio_onset_t * o) {
return o->desc->data[0];
}
smpl_t aubio_onset_get_thresholded_descriptor(aubio_onset_t * o) {
fvec_t * thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
return thresholded->data[0];
}
/* Allocate memory for an onset detection */
aubio_onset_t * new_aubio_onset (char_t * onset_mode,
uint_t buf_size, uint_t hop_size, uint_t samplerate)
{
aubio_onset_t * o = AUBIO_NEW(aubio_onset_t);
/* check parameters are valid */
if ((sint_t)hop_size < 1) {
AUBIO_ERR("onset: got hop_size %d, but can not be < 1\n", hop_size);
goto beach;
} else if ((sint_t)buf_size < 2) {
AUBIO_ERR("onset: got buffer_size %d, but can not be < 2\n", buf_size);
goto beach;
} else if (buf_size < hop_size) {
AUBIO_ERR("onset: hop size (%d) is larger than win size (%d)\n", buf_size, hop_size);
goto beach;
} else if ((sint_t)samplerate < 1) {
AUBIO_ERR("onset: samplerate (%d) can not be < 1\n", samplerate);
goto beach;
}
/* store creation parameters */
o->samplerate = samplerate;
o->hop_size = hop_size;
/* allocate memory */
o->pv = new_aubio_pvoc(buf_size, o->hop_size);
o->pp = new_aubio_peakpicker();
o->od = new_aubio_specdesc(onset_mode,buf_size);
o->fftgrain = new_cvec(buf_size);
o->desc = new_fvec(1);
/* set some default parameter */
aubio_onset_set_threshold (o, 0.3);
aubio_onset_set_delay(o, 4.3 * hop_size);
aubio_onset_set_minioi_ms(o, 20.);
aubio_onset_set_silence(o, -70.);
/* initialize internal variables */
o->last_onset = 0;
o->total_frames = 0;
return o;
beach:
AUBIO_FREE(o);
return NULL;
}
void del_aubio_onset (aubio_onset_t *o)
{
del_aubio_specdesc(o->od);
del_aubio_peakpicker(o->pp);
del_aubio_pvoc(o->pv);
del_fvec(o->desc);
del_cvec(o->fftgrain);
AUBIO_FREE(o);
}