ref: ad3770fa5f1372e5908805f6024ef3c4541d13ed
dir: /src/notes/notes.c/
/*
Copyright (C) 2014 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 "pitch/pitch.h"
#include "onset/onset.h"
#include "notes/notes.h"
#define AUBIO_DEFAULT_NOTES_SILENCE -70.
// increase to 10. for .1 cent precision
// or to 100. for .01 cent precision
#define AUBIO_DEFAULT_CENT_PRECISION 1.
#define AUBIO_DEFAULT_NOTES_MINIOI_MS 30.
struct _aubio_notes_t {
uint_t onset_buf_size;
uint_t pitch_buf_size;
uint_t hop_size;
uint_t samplerate;
uint_t median;
fvec_t *note_buffer;
fvec_t *note_buffer2;
aubio_pitch_t *pitch;
fvec_t *pitch_output;
smpl_t pitch_tolerance;
aubio_onset_t *onset;
fvec_t *onset_output;
smpl_t onset_threshold;
smpl_t curnote;
smpl_t newnote;
smpl_t silence_threshold;
uint_t isready;
};
aubio_notes_t * new_aubio_notes (const char_t * method,
uint_t buf_size, uint_t hop_size, uint_t samplerate) {
aubio_notes_t *o = AUBIO_NEW(aubio_notes_t);
const char_t * onset_method = "default";
const char_t * pitch_method = "default";
o->onset_buf_size = buf_size;
o->pitch_buf_size = buf_size * 4;
o->hop_size = hop_size;
o->onset_threshold = 0.;
o->pitch_tolerance = 0.;
o->samplerate = samplerate;
o->median = 6;
o->isready = 0;
o->onset = new_aubio_onset (onset_method, o->onset_buf_size, o->hop_size, o->samplerate);
if (o->onset_threshold != 0.) aubio_onset_set_threshold (o->onset, o->onset_threshold);
o->onset_output = new_fvec (1);
o->pitch = new_aubio_pitch (pitch_method, o->pitch_buf_size, o->hop_size, o->samplerate);
if (o->pitch == NULL) goto fail;
if (o->pitch_tolerance != 0.) aubio_pitch_set_tolerance (o->pitch, o->pitch_tolerance);
aubio_pitch_set_unit (o->pitch, "midi");
o->pitch_output = new_fvec (1);
if (strcmp(method, "default") != 0) {
AUBIO_ERR("notes: unknown notes detection method \"%s\"\n", method);
goto fail;
}
o->note_buffer = new_fvec(o->median);
o->note_buffer2 = new_fvec(o->median);
o->curnote = -1.;
o->newnote = 0.;
aubio_notes_set_silence(o, AUBIO_DEFAULT_NOTES_SILENCE);
aubio_notes_set_minioi_ms (o, AUBIO_DEFAULT_NOTES_MINIOI_MS);
return o;
fail:
del_aubio_notes(o);
return NULL;
}
uint_t aubio_notes_set_silence(aubio_notes_t *o, smpl_t silence)
{
uint_t err = AUBIO_OK;
if (aubio_pitch_set_silence(o->pitch, silence) != AUBIO_OK) {
err = AUBIO_FAIL;
}
if (aubio_onset_set_silence(o->onset, silence) != AUBIO_OK) {
err = AUBIO_FAIL;
}
o->silence_threshold = silence;
return err;
}
smpl_t aubio_notes_get_silence(const aubio_notes_t *o)
{
return aubio_pitch_get_silence(o->pitch);
}
uint_t aubio_notes_set_minioi_ms (aubio_notes_t *o, smpl_t minioi_ms)
{
uint_t err = AUBIO_OK;
if (!o->onset || (aubio_onset_set_minioi_ms(o->onset, minioi_ms) != 0)) {
err = AUBIO_FAIL;
}
return err;
}
smpl_t aubio_notes_get_minioi_ms(const aubio_notes_t *o)
{
return aubio_onset_get_minioi_ms(o->onset);
}
/** append new note candidate to the note_buffer and return filtered value. we
* need to copy the input array as fvec_median destroy its input data.*/
static void
note_append (fvec_t * note_buffer, smpl_t curnote)
{
uint_t i = 0;
for (i = 0; i < note_buffer->length - 1; i++) {
note_buffer->data[i] = note_buffer->data[i + 1];
}
//note_buffer->data[note_buffer->length - 1] = ROUND(10.*curnote)/10.;
note_buffer->data[note_buffer->length - 1] = ROUND(AUBIO_DEFAULT_CENT_PRECISION*curnote);
return;
}
static smpl_t
aubio_notes_get_latest_note (aubio_notes_t *o)
{
fvec_copy(o->note_buffer, o->note_buffer2);
return fvec_median (o->note_buffer2) / AUBIO_DEFAULT_CENT_PRECISION;
}
void aubio_notes_do (aubio_notes_t *o, const fvec_t * input, fvec_t * notes)
{
smpl_t new_pitch, curlevel;
fvec_zeros(notes);
aubio_onset_do(o->onset, input, o->onset_output);
aubio_pitch_do (o->pitch, input, o->pitch_output);
new_pitch = o->pitch_output->data[0];
if(o->median){
note_append(o->note_buffer, new_pitch);
}
/* curlevel is negatif or 1 if silence */
curlevel = aubio_level_detection(input, o->silence_threshold);
if (o->onset_output->data[0] != 0) {
/* test for silence */
if (curlevel == 1.) {
if (o->median) o->isready = 0;
/* send note off */
//send_noteon(o->curnote,0);
//notes->data[0] = o->curnote;
//notes->data[1] = 0.;
notes->data[2] = o->curnote;
} else {
if (o->median) {
o->isready = 1;
} else {
/* kill old note */
//send_noteon(o->curnote,0, o->samplerate);
notes->data[2] = o->curnote;
/* get and send new one */
//send_noteon(new_pitch,127+(int)floor(curlevel), o->samplerate);
notes->data[0] = new_pitch;
notes->data[1] = 127 + (int)floor(curlevel);
o->curnote = new_pitch;
}
}
} else {
if (o->median) {
if (o->isready > 0)
o->isready++;
if (o->isready == o->median)
{
/* kill old note */
//send_noteon(curnote,0);
notes->data[2] = o->curnote;
o->newnote = aubio_notes_get_latest_note(o);
o->curnote = o->newnote;
/* get and send new one */
if (o->curnote>45){
//send_noteon(curnote,127+(int)floor(curlevel));
notes->data[0] = o->curnote;
notes->data[1] = 127 + (int) floor(curlevel);
}
}
} // if median
}
}
void del_aubio_notes (aubio_notes_t *o) {
if (o->note_buffer) del_fvec(o->note_buffer);
if (o->note_buffer2) del_fvec(o->note_buffer2);
if (o->pitch_output) del_fvec(o->pitch_output);
if (o->pitch) del_aubio_pitch(o->pitch);
if (o->onset_output) del_fvec(o->onset_output);
if (o->onset) del_aubio_onset(o->onset);
AUBIO_FREE(o);
}