/*
- Copyright (C) 2003 Paul Brossier
+ Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>
- 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 file is part of aubio.
- 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.
+ 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/>.
- 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.
*/
-/* This algorithm was developped by A. de Cheveigne and H. Kawahara and
+/* This algorithm was developed by A. de Cheveigné and H. Kawahara and
* published in:
*
* de Cheveigné, A., Kawahara, H. (2002) "YIN, a fundamental frequency
#include "mathutils.h"
#include "pitch/pitchyin.h"
+struct _aubio_pitchyin_t
+{
+ fvec_t *yin;
+ smpl_t tol;
+ uint_t peak_pos;
+};
+
+#if 0
+/** compute difference function
+
+ \param input input signal
+ \param yinbuf output buffer to store difference function (half shorter than input)
+
+*/
+void aubio_pitchyin_diff (fvec_t * input, fvec_t * yinbuf);
+
+/** in place computation of the YIN cumulative normalised function
+
+ \param yinbuf input signal (a square difference function), also used to store function
+
+*/
+void aubio_pitchyin_getcum (fvec_t * yinbuf);
+
+/** detect pitch in a YIN function
+
+ \param yinbuf input buffer as computed by aubio_pitchyin_getcum
+
+*/
+uint_t aubio_pitchyin_getpitch (const fvec_t * yinbuf);
+#endif
+
+aubio_pitchyin_t *
+new_aubio_pitchyin (uint_t bufsize)
+{
+ aubio_pitchyin_t *o = AUBIO_NEW (aubio_pitchyin_t);
+ o->yin = new_fvec (bufsize / 2);
+ o->tol = 0.15;
+ o->peak_pos = 0;
+ return o;
+}
+
+void
+del_aubio_pitchyin (aubio_pitchyin_t * o)
+{
+ del_fvec (o->yin);
+ AUBIO_FREE (o);
+}
+
+#if 0
/* outputs the difference function */
-void aubio_pitchyin_diff(fvec_t * input, fvec_t * yin){
- uint_t c,j,tau;
+void
+aubio_pitchyin_diff (fvec_t * input, fvec_t * yin)
+{
+ uint_t j, tau;
smpl_t tmp;
- for (c=0;c<input->channels;c++)
- {
- for (tau=0;tau<yin->length;tau++)
- {
- yin->data[c][tau] = 0.;
- }
- for (tau=1;tau<yin->length;tau++)
- {
- for (j=0;j<yin->length;j++)
- {
- tmp = input->data[c][j] - input->data[c][j+tau];
- yin->data[c][tau] += SQR(tmp);
- }
+ for (tau = 0; tau < yin->length; tau++) {
+ yin->data[tau] = 0.;
+ }
+ for (tau = 1; tau < yin->length; tau++) {
+ for (j = 0; j < yin->length; j++) {
+ tmp = input->data[j] - input->data[j + tau];
+ yin->data[tau] += SQR (tmp);
}
}
}
/* cumulative mean normalized difference function */
-void aubio_pitchyin_getcum(fvec_t * yin) {
- uint_t c,tau;
- smpl_t tmp;
- for (c=0;c<yin->channels;c++)
- {
- tmp = 0.;
- yin->data[c][0] = 1.;
- //AUBIO_DBG("%f\t",yin->data[c][0]);
- for (tau=1;tau<yin->length;tau++)
- {
- tmp += yin->data[c][tau];
- yin->data[c][tau] *= tau/tmp;
- //AUBIO_DBG("%f\t",yin->data[c][tau]);
- }
- //AUBIO_DBG("\n");
+void
+aubio_pitchyin_getcum (fvec_t * yin)
+{
+ uint_t tau;
+ smpl_t tmp = 0.;
+ yin->data[0] = 1.;
+ //AUBIO_DBG("%f\t",yin->data[0]);
+ for (tau = 1; tau < yin->length; tau++) {
+ tmp += yin->data[tau];
+ yin->data[tau] *= tau / tmp;
+ //AUBIO_DBG("%f\t",yin->data[tau]);
}
+ //AUBIO_DBG("\n");
}
-uint_t aubio_pitchyin_getpitch(fvec_t * yin) {
- uint_t c=0,tau=1;
- do
- {
- if(yin->data[c][tau] < 0.1) {
- while (yin->data[c][tau+1] < yin->data[c][tau]) {
+uint_t
+aubio_pitchyin_getpitch (const fvec_t * yin)
+{
+ uint_t tau = 1;
+ do {
+ if (yin->data[tau] < 0.1) {
+ while (yin->data[tau + 1] < yin->data[tau]) {
tau++;
}
return tau;
}
tau++;
- } while (tau<yin->length);
+ } while (tau < yin->length);
//AUBIO_DBG("No pitch found");
return 0;
}
-
+#endif
/* all the above in one */
-smpl_t aubio_pitchyin_getpitchfast(fvec_t * input, fvec_t * yin, smpl_t tol){
- uint_t c=0,j,tau = 0;
+void
+aubio_pitchyin_do (aubio_pitchyin_t * o, const fvec_t * input, fvec_t * out)
+{
+ const smpl_t tol = o->tol;
+ fvec_t* yin = o->yin;
+ const smpl_t *input_data = input->data;
+ const uint_t length = yin->length;
+ smpl_t *yin_data = yin->data;
+ uint_t j, tau;
sint_t period;
- smpl_t tmp = 0., tmp2 = 0.;
- yin->data[c][0] = 1.;
- for (tau=1;tau<yin->length;tau++)
- {
- yin->data[c][tau] = 0.;
- for (j=0;j<yin->length;j++)
- {
- tmp = input->data[c][j] - input->data[c][j+tau];
- yin->data[c][tau] += SQR(tmp);
+ smpl_t tmp, tmp2 = 0.;
+
+ yin_data[0] = 1.;
+ for (tau = 1; tau < length; tau++) {
+ yin_data[tau] = 0.;
+ for (j = 0; j < length; j++) {
+ tmp = input_data[j] - input_data[j + tau];
+ yin_data[tau] += SQR (tmp);
+ }
+ tmp2 += yin_data[tau];
+ if (tmp2 != 0) {
+ yin->data[tau] *= tau / tmp2;
+ } else {
+ yin->data[tau] = 1.;
}
- tmp2 += yin->data[c][tau];
- yin->data[c][tau] *= tau/tmp2;
- period = tau-3;
- if(tau > 4 && (yin->data[c][period] < tol) &&
- (yin->data[c][period] < yin->data[c][period+1])) {
- return vec_quadint(yin,period,1);
+ period = tau - 3;
+ if (tau > 4 && (yin_data[period] < tol) &&
+ (yin_data[period] < yin_data[period + 1])) {
+ o->peak_pos = (uint_t)period;
+ out->data[0] = fvec_quadratic_peak_pos (yin, o->peak_pos);
+ return;
}
}
- return vec_quadint(yin,fvec_min_elem(yin),1);
- //return 0;
+ o->peak_pos = (uint_t)fvec_min_elem (yin);
+ out->data[0] = fvec_quadratic_peak_pos (yin, o->peak_pos);
+}
+
+smpl_t
+aubio_pitchyin_get_confidence (aubio_pitchyin_t * o) {
+ return 1. - o->yin->data[o->peak_pos];
}
+uint_t
+aubio_pitchyin_set_tolerance (aubio_pitchyin_t * o, smpl_t tol)
+{
+ o->tol = tol;
+ return 0;
+}
+
+smpl_t
+aubio_pitchyin_get_tolerance (aubio_pitchyin_t * o)
+{
+ return o->tol;
+}
projects / aubio.git / blobdiff