ref: 0e5326d937b47820aaf9c8a44d9026acf85d47b3
dir: /src/pitch/pitch.c/
/*
Copyright (C) 2003-2009 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 "lvec.h"
#include "mathutils.h"
#include "musicutils.h"
#include "spectral/phasevoc.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/pitch.h"
/** pitch detection algorithm */
typedef enum
{
aubio_pitcht_yin, /**< YIN algorithm */
aubio_pitcht_mcomb, /**< Multi-comb filter */
aubio_pitcht_schmitt, /**< Schmitt trigger */
aubio_pitcht_fcomb, /**< Fast comb filter */
aubio_pitcht_yinfft, /**< Spectral YIN */
aubio_pitcht_default = aubio_pitcht_yinfft, /**< the one used when "default" is asked */
} aubio_pitch_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_pitch_mode;
typedef void (*aubio_pitch_func_t)
(aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
typedef smpl_t (*aubio_pitch_conv_t)
(smpl_t value, uint_t srate, uint_t bufsize);
void aubio_pitch_slideblock (aubio_pitch_t * p, fvec_t * ibuf);
void aubio_pitch_do_mcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
void aubio_pitch_do_yin (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
void aubio_pitch_do_schmitt (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
void aubio_pitch_do_fcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
void aubio_pitch_do_yinfft (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
/** generic pitch detection structure */
struct _aubio_pitch_t
{
aubio_pitch_type type; /**< pitch detection mode */
aubio_pitch_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_pitch_func_t callback; /**< pointer to current pitch detection method */
aubio_pitch_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_pitch_t *
new_aubio_pitch (char_t * pitch_mode,
uint_t bufsize, uint_t hopsize, uint_t samplerate)
{
aubio_pitch_t *p = AUBIO_NEW (aubio_pitch_t);
aubio_pitch_type pitch_type;
if (strcmp (pitch_mode, "mcomb") == 0)
pitch_type = aubio_pitcht_mcomb;
else if (strcmp (pitch_mode, "yinfft") == 0)
pitch_type = aubio_pitcht_yin;
else if (strcmp (pitch_mode, "yin") == 0)
pitch_type = aubio_pitcht_yin;
else if (strcmp (pitch_mode, "schmitt") == 0)
pitch_type = aubio_pitcht_schmitt;
else if (strcmp (pitch_mode, "fcomb") == 0)
pitch_type = aubio_pitcht_fcomb;
else if (strcmp (pitch_mode, "default") == 0)
pitch_type = aubio_pitcht_default;
else {
AUBIO_ERR ("unknown pitch detection method %s, using default.\n",
pitch_mode);
pitch_type = aubio_pitcht_default;
}
p->srate = samplerate;
p->type = pitch_type;
aubio_pitch_set_unit (p, "default");
p->bufsize = bufsize;
switch (p->type) {
case aubio_pitcht_yin:
p->buf = new_fvec (bufsize);
p->yin = new_aubio_pitchyin (bufsize);
p->callback = aubio_pitch_do_yin;
aubio_pitchyin_set_tolerance (p->yin, 0.15);
break;
case aubio_pitcht_mcomb:
p->pv = new_aubio_pvoc (bufsize, hopsize);
p->fftgrain = new_cvec (bufsize);
p->mcomb = new_aubio_pitchmcomb (bufsize, hopsize);
p->filter = new_aubio_filter_c_weighting (samplerate);
p->callback = aubio_pitch_do_mcomb;
break;
case aubio_pitcht_fcomb:
p->buf = new_fvec (bufsize);
p->fcomb = new_aubio_pitchfcomb (bufsize, hopsize);
p->callback = aubio_pitch_do_fcomb;
break;
case aubio_pitcht_schmitt:
p->buf = new_fvec (bufsize);
p->schmitt = new_aubio_pitchschmitt (bufsize);
p->callback = aubio_pitch_do_schmitt;
break;
case aubio_pitcht_yinfft:
p->buf = new_fvec (bufsize);
p->yinfft = new_aubio_pitchyinfft (bufsize);
p->callback = aubio_pitch_do_yinfft;
aubio_pitchyinfft_set_tolerance (p->yinfft, 0.85);
break;
default:
break;
}
return p;
}
void
del_aubio_pitch (aubio_pitch_t * p)
{
switch (p->type) {
case aubio_pitcht_yin:
del_fvec (p->buf);
del_aubio_pitchyin (p->yin);
break;
case aubio_pitcht_mcomb:
del_aubio_pvoc (p->pv);
del_cvec (p->fftgrain);
del_aubio_filter (p->filter);
del_aubio_pitchmcomb (p->mcomb);
break;
case aubio_pitcht_schmitt:
del_fvec (p->buf);
del_aubio_pitchschmitt (p->schmitt);
break;
case aubio_pitcht_fcomb:
del_fvec (p->buf);
del_aubio_pitchfcomb (p->fcomb);
break;
case aubio_pitcht_yinfft:
del_fvec (p->buf);
del_aubio_pitchyinfft (p->yinfft);
break;
default:
break;
}
AUBIO_FREE (p);
}
void
aubio_pitch_slideblock (aubio_pitch_t * p, fvec_t * ibuf)
{
uint_t j = 0, overlap_size = 0;
overlap_size = p->buf->length - ibuf->length;
for (j = 0; j < overlap_size; j++) {
p->buf->data[j] = p->buf->data[j + ibuf->length];
}
for (j = 0; j < ibuf->length; j++) {
p->buf->data[j + overlap_size] = ibuf->data[j];
}
}
uint_t
aubio_pitch_set_unit (aubio_pitch_t * p, char_t * pitch_unit)
{
aubio_pitch_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_pitch_set_tolerance (aubio_pitch_t * p, smpl_t tol)
{
switch (p->type) {
case aubio_pitcht_yin:
aubio_pitchyin_set_tolerance (p->yin, tol);
break;
case aubio_pitcht_yinfft:
aubio_pitchyinfft_set_tolerance (p->yinfft, tol);
break;
default:
break;
}
return AUBIO_OK;
}
void
aubio_pitch_do (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
{
p->callback (p, ibuf, obuf);
obuf->data[0] = p->freqconv (obuf->data[0], p->srate, p->bufsize);
}
void
aubio_pitch_do_mcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
{
aubio_filter_do (p->filter, ibuf);
aubio_pvoc_do (p->pv, ibuf, p->fftgrain);
aubio_pitchmcomb_do (p->mcomb, p->fftgrain, obuf);
obuf->data[0] = aubio_bintofreq (obuf->data[0], p->srate, p->bufsize);
}
void
aubio_pitch_do_yin (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
{
smpl_t pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchyin_do (p->yin, p->buf, obuf);
pitch = obuf->data[0];
if (pitch > 0) {
pitch = p->srate / (pitch + 0.);
} else {
pitch = 0.;
}
obuf->data[0] = pitch;
}
void
aubio_pitch_do_yinfft (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
{
smpl_t pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchyinfft_do (p->yinfft, p->buf, obuf);
pitch = obuf->data[0];
if (pitch > 0) {
pitch = p->srate / (pitch + 0.);
} else {
pitch = 0.;
}
obuf->data[0] = pitch;
}
void
aubio_pitch_do_fcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * out)
{
aubio_pitch_slideblock (p, ibuf);
aubio_pitchfcomb_do (p->fcomb, p->buf, out);
out->data[0] = aubio_bintofreq (out->data[0], p->srate, p->bufsize);
}
void
aubio_pitch_do_schmitt (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * out)
{
smpl_t period, pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchschmitt_do (p->schmitt, p->buf, out);
period = out->data[0];
if (period > 0) {
pitch = p->srate / period;
} else {
pitch = 0.;
}
out->data[0] = pitch;
}