ref: f7b7a351084295118143a25000512280b1c9e45b
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/pitchspecacf.h"
#include "pitch/pitch.h"
#define DEFAULT_PITCH_SILENCE -50.
/** pitch detection algorithms */
typedef enum
{
aubio_pitcht_yin, /**< `yin`, YIN algorithm */
aubio_pitcht_mcomb, /**< `mcomb`, Multi-comb filter */
aubio_pitcht_schmitt, /**< `schmitt`, Schmitt trigger */
aubio_pitcht_fcomb, /**< `fcomb`, Fast comb filter */
aubio_pitcht_yinfft, /**< `yinfft`, Spectral YIN */
aubio_pitcht_specacf, /**< `specacf`, Spectral autocorrelation */
aubio_pitcht_default
= aubio_pitcht_yinfft, /**< `default` */
} aubio_pitch_type;
/** pitch detection output modes */
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;
/** callback to get pitch candidate, defined below */
typedef void (*aubio_pitch_detect_t) (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
/** callback to convert pitch from one unit to another, defined below */
typedef smpl_t(*aubio_pitch_convert_t) (smpl_t value, uint_t samplerate, uint_t bufsize);
/** callback to fetch the confidence of the algorithm */
typedef smpl_t (*aubio_pitch_get_conf_t) (void * p);
/** 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 samplerate; /**< samplerate */
uint_t bufsize; /**< buffer size */
void *p_object; /**< pointer to pitch object */
aubio_filter_t *filter; /**< filter */
fvec_t *filtered; /**< filtered input */
aubio_pvoc_t *pv; /**< phase vocoder for mcomb */
cvec_t *fftgrain; /**< spectral frame for mcomb */
fvec_t *buf; /**< temporary buffer for yin */
aubio_pitch_detect_t detect_cb; /**< callback to get the pitch candidates */
aubio_pitch_convert_t conv_cb; /**< callback to convert it to the desired unit */
aubio_pitch_get_conf_t conf_cb; /**< pointer to the current confidence callback */
smpl_t silence; /**< silence threshold */
};
/* callback functions for pitch detection */
static void aubio_pitch_do_mcomb (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
static void aubio_pitch_do_yin (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
static void aubio_pitch_do_schmitt (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
static void aubio_pitch_do_fcomb (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
static void aubio_pitch_do_yinfft (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
static void aubio_pitch_do_specacf (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf);
/* internal functions for frequency conversion */
static smpl_t freqconvbin (smpl_t f, uint_t samplerate, uint_t bufsize);
static smpl_t freqconvmidi (smpl_t f, uint_t samplerate, uint_t bufsize);
static smpl_t freqconvpass (smpl_t f, uint_t samplerate, uint_t bufsize);
/* adapter to stack ibuf new samples at the end of buf, and trim `buf` to `bufsize` */
void aubio_pitch_slideblock (aubio_pitch_t * p, const fvec_t * ibuf);
aubio_pitch_t *
new_aubio_pitch (const 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 (pitch_mode == NULL) {
AUBIO_ERR ("pitch: can not use ‘NULL‘ for pitch detection method\n");
goto beach;
}
if (strcmp (pitch_mode, "mcomb") == 0)
pitch_type = aubio_pitcht_mcomb;
else if (strcmp (pitch_mode, "yinfft") == 0)
pitch_type = aubio_pitcht_yinfft;
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, "specacf") == 0)
pitch_type = aubio_pitcht_specacf;
else if (strcmp (pitch_mode, "default") == 0)
pitch_type = aubio_pitcht_default;
else {
AUBIO_ERR ("pitch: unknown pitch detection method ‘%s’\n", pitch_mode);
goto beach;
}
// check parameters are valid
if ((sint_t)hopsize < 1) {
AUBIO_ERR("pitch: got hopsize %d, but can not be < 1\n", hopsize);
goto beach;
} else if ((sint_t)bufsize < 1) {
AUBIO_ERR("pitch: got buffer_size %d, but can not be < 1\n", bufsize);
goto beach;
} else if (bufsize < hopsize) {
AUBIO_ERR("pitch: hop size (%d) is larger than win size (%d)\n", hopsize, bufsize);
goto beach;
} else if ((sint_t)samplerate < 1) {
AUBIO_ERR("pitch: samplerate (%d) can not be < 1\n", samplerate);
goto beach;
}
p->samplerate = samplerate;
p->type = pitch_type;
aubio_pitch_set_unit (p, "default");
p->bufsize = bufsize;
p->silence = DEFAULT_PITCH_SILENCE;
p->conf_cb = NULL;
switch (p->type) {
case aubio_pitcht_yin:
p->buf = new_fvec (bufsize);
p->p_object = new_aubio_pitchyin (bufsize);
if (!p->p_object) goto beach;
p->detect_cb = aubio_pitch_do_yin;
p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchyin_get_confidence;
aubio_pitchyin_set_tolerance (p->p_object, 0.15);
break;
case aubio_pitcht_mcomb:
p->filtered = new_fvec (hopsize);
p->pv = new_aubio_pvoc (bufsize, hopsize);
if (!p->pv) goto beach;
p->fftgrain = new_cvec (bufsize);
p->p_object = new_aubio_pitchmcomb (bufsize, hopsize);
p->filter = new_aubio_filter_c_weighting (samplerate);
p->detect_cb = aubio_pitch_do_mcomb;
break;
case aubio_pitcht_fcomb:
p->buf = new_fvec (bufsize);
p->p_object = new_aubio_pitchfcomb (bufsize, hopsize);
if (!p->p_object) goto beach;
p->detect_cb = aubio_pitch_do_fcomb;
break;
case aubio_pitcht_schmitt:
p->buf = new_fvec (bufsize);
p->p_object = new_aubio_pitchschmitt (bufsize);
p->detect_cb = aubio_pitch_do_schmitt;
break;
case aubio_pitcht_yinfft:
p->buf = new_fvec (bufsize);
p->p_object = new_aubio_pitchyinfft (samplerate, bufsize);
if (!p->p_object) goto beach;
p->detect_cb = aubio_pitch_do_yinfft;
p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchyinfft_get_confidence;
aubio_pitchyinfft_set_tolerance (p->p_object, 0.85);
break;
case aubio_pitcht_specacf:
p->buf = new_fvec (bufsize);
p->p_object = new_aubio_pitchspecacf (bufsize);
if (!p->p_object) goto beach;
p->detect_cb = aubio_pitch_do_specacf;
p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchspecacf_get_tolerance;
aubio_pitchspecacf_set_tolerance (p->p_object, 0.85);
break;
default:
break;
}
return p;
beach:
if (p->filtered) del_fvec(p->filtered);
if (p->buf) del_fvec(p->buf);
AUBIO_FREE(p);
return NULL;
}
void
del_aubio_pitch (aubio_pitch_t * p)
{
switch (p->type) {
case aubio_pitcht_yin:
del_fvec (p->buf);
del_aubio_pitchyin (p->p_object);
break;
case aubio_pitcht_mcomb:
del_fvec (p->filtered);
del_aubio_pvoc (p->pv);
del_cvec (p->fftgrain);
del_aubio_filter (p->filter);
del_aubio_pitchmcomb (p->p_object);
break;
case aubio_pitcht_schmitt:
del_fvec (p->buf);
del_aubio_pitchschmitt (p->p_object);
break;
case aubio_pitcht_fcomb:
del_fvec (p->buf);
del_aubio_pitchfcomb (p->p_object);
break;
case aubio_pitcht_yinfft:
del_fvec (p->buf);
del_aubio_pitchyinfft (p->p_object);
break;
case aubio_pitcht_specacf:
del_fvec (p->buf);
del_aubio_pitchspecacf (p->p_object);
break;
default:
break;
}
AUBIO_FREE (p);
}
void
aubio_pitch_slideblock (aubio_pitch_t * p, const fvec_t * ibuf)
{
uint_t overlap_size = p->buf->length - ibuf->length;
#if 1 //!HAVE_MEMCPY_HACKS
uint_t j;
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];
}
#else
smpl_t *data = p->buf->data;
smpl_t *newdata = ibuf->data;
memmove(data, data + ibuf->length, overlap_size);
memcpy(data + overlap_size, newdata, ibuf->length);
#endif
}
uint_t
aubio_pitch_set_unit (aubio_pitch_t * p, const char_t * pitch_unit)
{
uint_t err = AUBIO_OK;
aubio_pitch_mode pitch_mode;
if (strcmp (pitch_unit, "freq") == 0)
pitch_mode = aubio_pitchm_freq;
else if (strcmp (pitch_unit, "hertz") == 0)
pitch_mode = aubio_pitchm_freq;
else if (strcmp (pitch_unit, "Hertz") == 0)
pitch_mode = aubio_pitchm_freq;
else if (strcmp (pitch_unit, "Hz") == 0)
pitch_mode = aubio_pitchm_freq;
else if (strcmp (pitch_unit, "f0") == 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_WRN("pitch: unknown pitch detection unit ‘%s’, using default\n",
pitch_unit);
pitch_mode = aubio_pitchm_default;
err = AUBIO_FAIL;
}
p->mode = pitch_mode;
switch (p->mode) {
case aubio_pitchm_freq:
p->conv_cb = freqconvpass;
break;
case aubio_pitchm_midi:
p->conv_cb = freqconvmidi;
break;
case aubio_pitchm_cent:
/* bug: not implemented */
p->conv_cb = freqconvmidi;
break;
case aubio_pitchm_bin:
p->conv_cb = freqconvbin;
break;
default:
break;
}
return err;
}
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->p_object, tol);
break;
case aubio_pitcht_yinfft:
aubio_pitchyinfft_set_tolerance (p->p_object, tol);
break;
default:
break;
}
return AUBIO_OK;
}
smpl_t
aubio_pitch_get_tolerance (aubio_pitch_t * p)
{
smpl_t tolerance = 1.;
switch (p->type) {
case aubio_pitcht_yin:
tolerance = aubio_pitchyin_get_tolerance (p->p_object);
break;
case aubio_pitcht_yinfft:
tolerance = aubio_pitchyinfft_get_tolerance (p->p_object);
break;
default:
break;
}
return tolerance;
}
uint_t
aubio_pitch_set_silence (aubio_pitch_t * p, smpl_t silence)
{
if (silence <= 0 && silence >= -200) {
p->silence = silence;
return AUBIO_OK;
} else {
AUBIO_WRN("pitch: could not set silence to %.2f\n", silence);
return AUBIO_FAIL;
}
}
smpl_t
aubio_pitch_get_silence (aubio_pitch_t * p)
{
return p->silence;
}
/* do method, calling the detection callback, then the conversion callback */
void
aubio_pitch_do (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf)
{
p->detect_cb (p, ibuf, obuf);
if (aubio_silence_detection(ibuf, p->silence) == 1) {
obuf->data[0] = 0.;
}
obuf->data[0] = p->conv_cb (obuf->data[0], p->samplerate, p->bufsize);
}
/* do method for each algorithm */
void
aubio_pitch_do_mcomb (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf)
{
aubio_filter_do_outplace (p->filter, ibuf, p->filtered);
aubio_pvoc_do (p->pv, ibuf, p->fftgrain);
aubio_pitchmcomb_do (p->p_object, p->fftgrain, obuf);
obuf->data[0] = aubio_bintofreq (obuf->data[0], p->samplerate, p->bufsize);
}
void
aubio_pitch_do_yin (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf)
{
smpl_t pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchyin_do (p->p_object, p->buf, obuf);
pitch = obuf->data[0];
if (pitch > 0) {
pitch = p->samplerate / (pitch + 0.);
} else {
pitch = 0.;
}
obuf->data[0] = pitch;
}
void
aubio_pitch_do_yinfft (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * obuf)
{
smpl_t pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchyinfft_do (p->p_object, p->buf, obuf);
pitch = obuf->data[0];
if (pitch > 0) {
pitch = p->samplerate / (pitch + 0.);
} else {
pitch = 0.;
}
obuf->data[0] = pitch;
}
void
aubio_pitch_do_specacf (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * out)
{
smpl_t pitch = 0., period;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchspecacf_do (p->p_object, p->buf, out);
//out->data[0] = aubio_bintofreq (out->data[0], p->samplerate, p->bufsize);
period = out->data[0];
if (period > 0) {
pitch = p->samplerate / period;
} else {
pitch = 0.;
}
out->data[0] = pitch;
}
void
aubio_pitch_do_fcomb (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * out)
{
aubio_pitch_slideblock (p, ibuf);
aubio_pitchfcomb_do (p->p_object, p->buf, out);
out->data[0] = aubio_bintofreq (out->data[0], p->samplerate, p->bufsize);
}
void
aubio_pitch_do_schmitt (aubio_pitch_t * p, const fvec_t * ibuf, fvec_t * out)
{
smpl_t period, pitch = 0.;
aubio_pitch_slideblock (p, ibuf);
aubio_pitchschmitt_do (p->p_object, p->buf, out);
period = out->data[0];
if (period > 0) {
pitch = p->samplerate / period;
} else {
pitch = 0.;
}
out->data[0] = pitch;
}
/* conversion callbacks */
smpl_t
freqconvbin(smpl_t f, uint_t samplerate, uint_t bufsize)
{
return aubio_freqtobin(f, samplerate, bufsize);
}
smpl_t
freqconvmidi (smpl_t f, uint_t samplerate UNUSED, uint_t bufsize UNUSED)
{
return aubio_freqtomidi (f);
}
smpl_t
freqconvpass (smpl_t f, uint_t samplerate UNUSED, uint_t bufsize UNUSED)
{
return f;
}
/* confidence callbacks */
smpl_t
aubio_pitch_get_confidence (aubio_pitch_t * p)
{
if (p->conf_cb) {
return p->conf_cb(p->p_object);
}
return 0.;
}