ref: 0d434df5868fcf0f3cacfc22b6ddfc8355a18cd6
dir: /src/pitch/pitchdetection.c/
/*
Copyright (C) 2003 Paul Brossier
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include "aubio_priv.h"
#include "fvec.h"
#include "cvec.h"
#include "lvec.h"
#include "spectral/phasevoc.h"
#include "mathutils.h"
#include "temporal/filter.h"
#include "temporal/c_weighting.h"
#include "pitch/pitchmcomb.h"
#include "pitch/pitchyin.h"
#include "pitch/pitchfcomb.h"
#include "pitch/pitchschmitt.h"
#include "pitch/pitchyinfft.h"
#include "pitch/pitchdetection.h"
/** pitch detection algorithm */
typedef enum {
aubio_pitch_yin, /**< YIN algorithm */
aubio_pitch_mcomb, /**< Multi-comb filter */
aubio_pitch_schmitt, /**< Schmitt trigger */
aubio_pitch_fcomb, /**< Fast comb filter */
aubio_pitch_yinfft, /**< Spectral YIN */
aubio_pitch_default = aubio_pitch_yinfft, /**< the one used when "default" is asked */
} aubio_pitchdetection_type;
/** pitch detection output mode */
typedef enum {
aubio_pitchm_freq, /**< Frequency (Hz) */
aubio_pitchm_midi, /**< MIDI note (0.,127) */
aubio_pitchm_cent, /**< Cent */
aubio_pitchm_bin, /**< Frequency bin (0,bufsize) */
aubio_pitchm_default = aubio_pitchm_freq, /**< the one used when "default" is asked */
} aubio_pitchdetection_mode;
typedef void (*aubio_pitchdetection_func_t)
(aubio_pitchdetection_t *p, fvec_t * ibuf, fvec_t *obuf);
typedef smpl_t (*aubio_pitchdetection_conv_t)
(smpl_t value, uint_t srate, uint_t bufsize);
void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf);
void aubio_pitchdetection_mcomb (aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *obuf);
void aubio_pitchdetection_yin (aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *obuf);
void aubio_pitchdetection_schmitt (aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *obuf);
void aubio_pitchdetection_fcomb (aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *obuf);
void aubio_pitchdetection_yinfft (aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *obuf);
/** generic pitch detection structure */
struct _aubio_pitchdetection_t {
aubio_pitchdetection_type type; /**< pitch detection mode */
aubio_pitchdetection_mode mode; /**< pitch detection output mode */
uint_t srate; /**< samplerate */
uint_t bufsize; /**< buffer size */
aubio_pitchmcomb_t * mcomb; /**< mcomb object */
aubio_pitchfcomb_t * fcomb; /**< fcomb object */
aubio_pitchschmitt_t * schmitt; /**< schmitt object */
aubio_pitchyinfft_t * yinfft; /**< yinfft object */
aubio_pitchyin_t * yin; /**< yinfft object */
aubio_filter_t * filter; /**< filter */
aubio_pvoc_t * pv; /**< phase vocoder for mcomb */
cvec_t * fftgrain; /**< spectral frame for mcomb */
fvec_t * buf; /**< temporary buffer for yin */
aubio_pitchdetection_func_t callback; /**< pointer to current pitch detection method */
aubio_pitchdetection_conv_t freqconv; /**< pointer to current pitch conversion method */
};
/* convenience wrapper function for frequency unit conversions
* should probably be rewritten with #defines */
smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvbin(smpl_t f,uint_t srate,uint_t bufsize){
return aubio_freqtobin(f,srate,bufsize);
}
smpl_t freqconvmidi(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvmidi(smpl_t f,uint_t srate UNUSED,uint_t bufsize UNUSED){
return aubio_freqtomidi(f);
}
smpl_t freqconvpass(smpl_t f,uint_t srate,uint_t bufsize);
smpl_t freqconvpass(smpl_t f,uint_t srate UNUSED,uint_t bufsize UNUSED){
return f;
}
aubio_pitchdetection_t *
new_aubio_pitchdetection (char_t * pitch_mode,
uint_t bufsize, uint_t hopsize, uint_t channels, uint_t samplerate)
{
aubio_pitchdetection_t *p = AUBIO_NEW(aubio_pitchdetection_t);
aubio_pitchdetection_type pitch_type;
if (strcmp (pitch_mode, "mcomb") == 0)
pitch_type = aubio_pitch_mcomb;
else if (strcmp (pitch_mode, "yinfft") == 0)
pitch_type = aubio_pitch_yin;
else if (strcmp (pitch_mode, "yin") == 0)
pitch_type = aubio_pitch_yin;
else if (strcmp (pitch_mode, "schmitt") == 0)
pitch_type = aubio_pitch_schmitt;
else if (strcmp (pitch_mode, "fcomb") == 0)
pitch_type = aubio_pitch_fcomb;
else if (strcmp (pitch_mode, "default") == 0)
pitch_type = aubio_pitch_default;
else {
AUBIO_ERR ("unknown pitch detection method %s, using default.\n", pitch_mode);
pitch_type = aubio_pitch_default;
return NULL;
}
p->srate = samplerate;
p->type = pitch_type;
aubio_pitchdetection_set_unit (p, "default");
p->bufsize = bufsize;
switch(p->type) {
case aubio_pitch_yin:
p->buf = new_fvec(bufsize,channels);
p->yin = new_aubio_pitchyin(bufsize);
p->callback = aubio_pitchdetection_yin;
aubio_pitchyin_set_tolerance (p->yin, 0.15);
break;
case aubio_pitch_mcomb:
p->pv = new_aubio_pvoc(bufsize, hopsize, channels);
p->fftgrain = new_cvec(bufsize, channels);
p->mcomb = new_aubio_pitchmcomb(bufsize,hopsize,channels);
p->filter = new_aubio_filter_c_weighting (samplerate, channels);
p->callback = aubio_pitchdetection_mcomb;
break;
case aubio_pitch_fcomb:
p->buf = new_fvec(bufsize,channels);
p->fcomb = new_aubio_pitchfcomb(bufsize,hopsize,channels);
p->callback = aubio_pitchdetection_fcomb;
break;
case aubio_pitch_schmitt:
p->buf = new_fvec(bufsize,channels);
p->schmitt = new_aubio_pitchschmitt(bufsize);
p->callback = aubio_pitchdetection_schmitt;
break;
case aubio_pitch_yinfft:
p->buf = new_fvec(bufsize,channels);
p->yinfft = new_aubio_pitchyinfft(bufsize);
p->callback = aubio_pitchdetection_yinfft;
aubio_pitchyinfft_set_tolerance (p->yinfft, 0.85);
break;
default:
break;
}
return p;
}
void del_aubio_pitchdetection(aubio_pitchdetection_t * p) {
switch(p->type) {
case aubio_pitch_yin:
del_fvec(p->buf);
del_aubio_pitchyin(p->yin);
break;
case aubio_pitch_mcomb:
del_aubio_pvoc(p->pv);
del_cvec(p->fftgrain);
del_aubio_filter(p->filter);
del_aubio_pitchmcomb(p->mcomb);
break;
case aubio_pitch_schmitt:
del_fvec(p->buf);
del_aubio_pitchschmitt(p->schmitt);
break;
case aubio_pitch_fcomb:
del_fvec(p->buf);
del_aubio_pitchfcomb(p->fcomb);
break;
case aubio_pitch_yinfft:
del_fvec(p->buf);
del_aubio_pitchyinfft(p->yinfft);
break;
default:
break;
}
AUBIO_FREE(p);
}
void aubio_pitchdetection_slideblock(aubio_pitchdetection_t *p, fvec_t *ibuf){
uint_t i,j = 0, overlap_size = 0;
overlap_size = p->buf->length-ibuf->length;
for (i=0;i<p->buf->channels;i++){
for (j=0;j<overlap_size;j++){
p->buf->data[i][j] = p->buf->data[i][j+ibuf->length];
}
}
for (i=0;i<ibuf->channels;i++){
for (j=0;j<ibuf->length;j++){
p->buf->data[i][j+overlap_size] = ibuf->data[i][j];
}
}
}
uint_t aubio_pitchdetection_set_unit (aubio_pitchdetection_t *p, char_t * pitch_unit) {
aubio_pitchdetection_mode pitch_mode;
if (strcmp (pitch_unit, "freq") == 0)
pitch_mode = aubio_pitchm_freq;
else if (strcmp (pitch_unit, "midi") == 0)
pitch_mode = aubio_pitchm_midi;
else if (strcmp (pitch_unit, "cent") == 0)
pitch_mode = aubio_pitchm_cent;
else if (strcmp (pitch_unit, "bin") == 0)
pitch_mode = aubio_pitchm_bin;
else if (strcmp (pitch_unit, "default") == 0)
pitch_mode = aubio_pitchm_default;
else {
AUBIO_ERR ("unknown pitch detection unit %s, using default\n", pitch_unit);
pitch_mode = aubio_pitchm_default;
}
p->mode = pitch_mode;
switch(p->mode) {
case aubio_pitchm_freq:
p->freqconv = freqconvpass;
break;
case aubio_pitchm_midi:
p->freqconv = freqconvmidi;
break;
case aubio_pitchm_cent:
/* bug: not implemented */
p->freqconv = freqconvmidi;
break;
case aubio_pitchm_bin:
p->freqconv = freqconvbin;
break;
default:
break;
}
return AUBIO_OK;
}
uint_t aubio_pitchdetection_set_tolerance(aubio_pitchdetection_t *p, smpl_t tol) {
switch(p->type) {
case aubio_pitch_yin:
aubio_pitchyin_set_tolerance (p->yin, tol);
break;
case aubio_pitch_yinfft:
aubio_pitchyinfft_set_tolerance (p->yinfft, tol);
break;
default:
break;
}
return AUBIO_OK;
}
void aubio_pitchdetection_do (aubio_pitchdetection_t *p, fvec_t * ibuf, fvec_t *obuf) {
uint_t i;
p->callback(p, ibuf, obuf);
for (i = 0; i < obuf->channels; i++) {
p->freqconv(obuf->data[i][0],p->srate,p->bufsize);
}
}
void aubio_pitchdetection_mcomb(aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t * obuf) {
uint_t i;
aubio_filter_do(p->filter,ibuf);
aubio_pvoc_do(p->pv,ibuf,p->fftgrain);
aubio_pitchmcomb_do(p->mcomb,p->fftgrain, obuf);
for (i = 0; i < obuf->channels; i++) {
obuf->data[i][0] = aubio_bintofreq (obuf->data[i][0], p->srate, p->bufsize);
}
}
void aubio_pitchdetection_yin(aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t * obuf) {
smpl_t pitch = 0.;
uint_t i;
aubio_pitchdetection_slideblock(p,ibuf);
aubio_pitchyin_do(p->yin,p->buf, obuf);
for (i = 0; i < obuf->channels; i++) {
pitch = obuf->data[i][0];
if (pitch>0) {
pitch = p->srate/(pitch+0.);
} else {
pitch = 0.;
}
obuf->data[i][0] = pitch;
}
}
void aubio_pitchdetection_yinfft(aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t * obuf){
smpl_t pitch = 0.;
uint_t i;
aubio_pitchdetection_slideblock(p,ibuf);
aubio_pitchyinfft_do(p->yinfft,p->buf,obuf);
for (i = 0; i < obuf->channels; i++) {
pitch = obuf->data[i][0];
if (pitch>0) {
pitch = p->srate/(pitch+0.);
} else {
pitch = 0.;
}
obuf->data[i][0] = pitch;
}
}
void aubio_pitchdetection_fcomb(aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t * out){
uint_t i;
aubio_pitchdetection_slideblock(p,ibuf);
aubio_pitchfcomb_do(p->fcomb,p->buf, out);
for (i = 0; i < out->channels; i++) {
out->data[i][0] = aubio_bintofreq (out->data[i][0], p->srate, p->bufsize);
}
}
void aubio_pitchdetection_schmitt(aubio_pitchdetection_t *p, fvec_t *ibuf, fvec_t *out){
smpl_t period, pitch = 0.;
uint_t i;
aubio_pitchdetection_slideblock(p,ibuf);
aubio_pitchschmitt_do(p->schmitt,p->buf, out);
for (i = 0; i < out->channels; i++) {
period = out->data[i][0];
if (period>0) {
pitch = p->srate/period;
} else {
pitch = 0.;
}
out->data[i][0] = pitch;
}
}