/*
- Copyright (C) 2003 Paul Brossier
+ Copyright (C) 2003-2013 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.
*/
#include "aubio_priv.h"
#include "pitch/pitchyinfft.h"
/** pitch yinfft structure */
-struct _aubio_pitchyinfft_t {
- fvec_t * win; /**< temporal weighting window */
- fvec_t * winput; /**< windowed spectrum */
- cvec_t * res; /**< complex vector to compute square difference function */
- fvec_t * sqrmag; /**< square difference function */
- fvec_t * weight; /**< spectral weighting window (psychoacoustic model) */
- cvec_t * fftout; /**< Fourier transform output */
- aubio_fft_t * fft; /**< fft object to compute square difference function */
- fvec_t * yinfft; /**< Yin function */
+struct _aubio_pitchyinfft_t
+{
+ fvec_t *win; /**< temporal weighting window */
+ fvec_t *winput; /**< windowed spectrum */
+ fvec_t *sqrmag; /**< square difference function */
+ fvec_t *weight; /**< spectral weighting window (psychoacoustic model) */
+ fvec_t *fftout; /**< Fourier transform output */
+ aubio_fft_t *fft; /**< fft object to compute square difference function */
+ fvec_t *yinfft; /**< Yin function */
+ smpl_t tol; /**< Yin tolerance */
+ uint_t peak_pos; /**< currently selected peak pos*/
+ uint_t short_period; /** shortest period under which to check for octave error */
};
-static const smpl_t freqs[] = {0., 20., 25., 31.5, 40., 50., 63., 80., 100.,
- 125., 160., 200., 250., 315., 400., 500., 630., 800., 1000., 1250.,
- 1600., 2000., 2500., 3150., 4000., 5000., 6300., 8000., 9000., 10000.,
- 12500., 15000., 20000., 25100};
+static const smpl_t freqs[] = {
+ 0., 20., 25., 31.5, 40., 50., 63., 80., 100., 125.,
+ 160., 200., 250., 315., 400., 500., 630., 800., 1000., 1250.,
+ 1600., 2000., 2500., 3150., 4000., 5000., 6300., 8000., 9000., 10000.,
+ 12500., 15000., 20000., 25100., -1.
+};
-static const smpl_t weight[] = {-75.8, -70.1, -60.8, -52.1, -44.2, -37.5,
- -31.3, -25.6, -20.9, -16.5, -12.6, -9.6, -7.0, -4.7, -3.0, -1.8, -0.8,
- -0.2, -0.0, 0.5, 1.6, 3.2, 5.4, 7.8, 8.1, 5.3, -2.4, -11.1, -12.8,
- -12.2, -7.4, -17.8, -17.8, -17.8};
+static const smpl_t weight[] = {
+ -75.8, -70.1, -60.8, -52.1, -44.2, -37.5, -31.3, -25.6, -20.9, -16.5,
+ -12.6, -9.60, -7.00, -4.70, -3.00, -1.80, -0.80, -0.20, -0.00, 0.50,
+ 1.60, 3.20, 5.40, 7.80, 8.10, 5.30, -2.40, -11.1, -12.8, -12.2,
+ -7.40, -17.8, -17.8, -17.8
+};
-aubio_pitchyinfft_t * new_aubio_pitchyinfft (uint_t bufsize)
+aubio_pitchyinfft_t *
+new_aubio_pitchyinfft (uint_t samplerate, uint_t bufsize)
{
- aubio_pitchyinfft_t * p = AUBIO_NEW(aubio_pitchyinfft_t);
- p->winput = new_fvec(bufsize,1);
- p->fft = new_aubio_fft(bufsize, 1);
- p->fftout = new_cvec(bufsize,1);
- p->sqrmag = new_fvec(bufsize,1);
- p->res = new_cvec(bufsize,1);
- p->yinfft = new_fvec(bufsize/2+1,1);
- p->win = new_aubio_window(bufsize, aubio_win_hanningz);
- p->weight = new_fvec(bufsize/2+1,1);
- {
- uint_t i = 0, j = 1;
- smpl_t freq = 0, a0 = 0, a1 = 0, f0 = 0, f1 = 0;
- for (i=0; i<p->weight->length; i++) {
- freq = (smpl_t)i/(smpl_t)bufsize*(smpl_t)44100.;
- while (freq > freqs[j]) {
- j +=1;
- }
- a0 = weight[j-1];
- f0 = freqs[j-1];
- a1 = weight[j];
- f1 = freqs[j];
- if (f0 == f1) { // just in case
- p->weight->data[0][i] = a0;
- } else if (f0 == 0) { // y = ax+b
- p->weight->data[0][i] = (a1-a0)/f1*freq + a0;
- } else {
- p->weight->data[0][i] = (a1-a0)/(f1-f0)*freq +
- (a0 - (a1 - a0)/(f1/f0 - 1.));
- }
- while (freq > freqs[j]) {
- j +=1;
- }
- //AUBIO_DBG("%f\n",p->weight->data[0][i]);
- p->weight->data[0][i] = DB2LIN(p->weight->data[0][i]);
- //p->weight->data[0][i] = SQRT(DB2LIN(p->weight->data[0][i]));
+ uint_t i = 0, j = 1;
+ smpl_t freq = 0, a0 = 0, a1 = 0, f0 = 0, f1 = 0;
+ aubio_pitchyinfft_t *p = AUBIO_NEW (aubio_pitchyinfft_t);
+ p->winput = new_fvec (bufsize);
+ p->fft = new_aubio_fft (bufsize);
+ if (!p->fft) goto beach;
+ p->fftout = new_fvec (bufsize);
+ p->sqrmag = new_fvec (bufsize);
+ p->yinfft = new_fvec (bufsize / 2 + 1);
+ p->tol = 0.85;
+ p->peak_pos = 0;
+ p->win = new_aubio_window ("hanningz", bufsize);
+ p->weight = new_fvec (bufsize / 2 + 1);
+ for (i = 0; i < p->weight->length; i++) {
+ freq = (smpl_t) i / (smpl_t) bufsize *(smpl_t) samplerate;
+ while (freq > freqs[j] && freqs[j] > 0) {
+ //AUBIO_DBG("freq %3.5f > %3.5f \tsamplerate %d (Hz) \t"
+ // "(weight length %d, bufsize %d) %d %d\n", freq, freqs[j],
+ // samplerate, p->weight->length, bufsize, i, j);
+ j += 1;
+ }
+ a0 = weight[j - 1];
+ f0 = freqs[j - 1];
+ a1 = weight[j];
+ f1 = freqs[j];
+ if (f0 == f1) { // just in case
+ p->weight->data[i] = a0;
+ } else if (f0 == 0) { // y = ax+b
+ p->weight->data[i] = (a1 - a0) / f1 * freq + a0;
+ } else {
+ p->weight->data[i] = (a1 - a0) / (f1 - f0) * freq +
+ (a0 - (a1 - a0) / (f1 / f0 - 1.));
}
+ while (freq > freqs[j]) {
+ j += 1;
+ }
+ //AUBIO_DBG("%f\n",p->weight->data[i]);
+ p->weight->data[i] = DB2LIN (p->weight->data[i]);
+ //p->weight->data[i] = SQRT(DB2LIN(p->weight->data[i]));
}
+ // check for octave errors above 1300 Hz
+ p->short_period = (uint_t)ROUND(samplerate / 1300.);
return p;
+
+beach:
+ if (p->winput) del_fvec(p->winput);
+ AUBIO_FREE(p);
+ return NULL;
}
-smpl_t aubio_pitchyinfft_do (aubio_pitchyinfft_t * p, fvec_t * input, smpl_t tol) {
- uint_t tau, l = 0;
+void
+aubio_pitchyinfft_do (aubio_pitchyinfft_t * p, const fvec_t * input, fvec_t * output)
+{
+ uint_t tau, l;
+ uint_t length = p->fftout->length;
uint_t halfperiod;
- smpl_t tmp = 0, sum = 0;
- cvec_t * res = (cvec_t *)p->res;
- fvec_t * yin = (fvec_t *)p->yinfft;
- for (l=0; l < input->length; l++){
- p->winput->data[0][l] = p->win->data[0][l] * input->data[0][l];
+ fvec_t *fftout = p->fftout;
+ fvec_t *yin = p->yinfft;
+ smpl_t tmp = 0., sum = 0.;
+ // window the input
+ fvec_weighted_copy(input, p->win, p->winput);
+ // get the real / imag parts of its fft
+ aubio_fft_do_complex (p->fft, p->winput, fftout);
+ // get the squared magnitude spectrum, applying some weight
+ p->sqrmag->data[0] = SQR(fftout->data[0]);
+ p->sqrmag->data[0] *= p->weight->data[0];
+ for (l = 1; l < length / 2; l++) {
+ p->sqrmag->data[l] = SQR(fftout->data[l]) + SQR(fftout->data[length - l]);
+ p->sqrmag->data[l] *= p->weight->data[l];
+ p->sqrmag->data[length - l] = p->sqrmag->data[l];
}
- aubio_fft_do(p->fft,p->winput,p->fftout);
- for (l=0; l < p->fftout->length; l++){
- p->sqrmag->data[0][l] = SQR(p->fftout->norm[0][l]);
- p->sqrmag->data[0][l] *= p->weight->data[0][l];
- }
- for (l=1; l < p->fftout->length; l++){
- p->sqrmag->data[0][(p->fftout->length-1)*2-l] =
- SQR(p->fftout->norm[0][l]);
- p->sqrmag->data[0][(p->fftout->length-1)*2-l] *=
- p->weight->data[0][l];
- }
- for (l=0; l < p->sqrmag->length/2+1; l++) {
- sum += p->sqrmag->data[0][l];
+ p->sqrmag->data[length / 2] = SQR(fftout->data[length / 2]);
+ p->sqrmag->data[length / 2] *= p->weight->data[length / 2];
+ // get sum of weighted squared mags
+ for (l = 0; l < length / 2 + 1; l++) {
+ sum += p->sqrmag->data[l];
}
sum *= 2.;
- aubio_fft_do(p->fft,p->sqrmag,res);
- yin->data[0][0] = 1.;
- for (tau=1; tau < yin->length; tau++) {
- yin->data[0][tau] = sum -
- res->norm[0][tau]*COS(res->phas[0][tau]);
- tmp += yin->data[0][tau];
- yin->data[0][tau] *= tau/tmp;
+ // get the real / imag parts of the fft of the squared magnitude
+ aubio_fft_do_complex (p->fft, p->sqrmag, fftout);
+ yin->data[0] = 1.;
+ for (tau = 1; tau < yin->length; tau++) {
+ // compute the square differences
+ yin->data[tau] = sum - fftout->data[tau];
+ // and the cumulative mean normalized difference function
+ tmp += yin->data[tau];
+ if (tmp != 0) {
+ yin->data[tau] *= tau / tmp;
+ } else {
+ yin->data[tau] = 1.;
+ }
}
- tau = fvec_min_elem(yin);
- if (yin->data[0][tau] < tol) {
- /* no interpolation */
- //return tau;
- /* 3 point quadratic interpolation */
- //return fvec_quadint_min(yin,tau,1);
+ // find best candidates
+ tau = fvec_min_elem (yin);
+ if (yin->data[tau] < p->tol) {
+ // no interpolation, directly return the period as an integer
+ //output->data[0] = tau;
+ //return;
+
+ // 3 point quadratic interpolation
+ //return fvec_quadratic_peak_pos (yin,tau,1);
/* additional check for (unlikely) octave doubling in higher frequencies */
- if (tau>35) {
- return fvec_quadint(yin,tau,1);
+ if (tau > p->short_period) {
+ output->data[0] = fvec_quadratic_peak_pos (yin, tau);
} else {
/* should compare the minimum value of each interpolated peaks */
- halfperiod = FLOOR(tau/2+.5);
- if (yin->data[0][halfperiod] < tol)
- return fvec_quadint(yin,halfperiod,1);
+ halfperiod = FLOOR (tau / 2 + .5);
+ if (yin->data[halfperiod] < p->tol)
+ p->peak_pos = halfperiod;
else
- return fvec_quadint(yin,tau,1);
+ p->peak_pos = tau;
+ output->data[0] = fvec_quadratic_peak_pos (yin, p->peak_pos);
}
- } else
- return 0.;
+ } else {
+ p->peak_pos = 0;
+ output->data[0] = 0.;
+ }
}
-void del_aubio_pitchyinfft(aubio_pitchyinfft_t *p){
- del_fvec(p->win);
- del_aubio_fft(p->fft);
- del_fvec(p->yinfft);
- del_fvec(p->sqrmag);
- del_cvec(p->res);
- del_cvec(p->fftout);
- del_fvec(p->winput);
- del_fvec(p->weight);
- AUBIO_FREE(p);
+void
+del_aubio_pitchyinfft (aubio_pitchyinfft_t * p)
+{
+ del_fvec (p->win);
+ del_aubio_fft (p->fft);
+ del_fvec (p->yinfft);
+ del_fvec (p->sqrmag);
+ del_fvec (p->fftout);
+ del_fvec (p->winput);
+ del_fvec (p->weight);
+ AUBIO_FREE (p);
+}
+
+smpl_t
+aubio_pitchyinfft_get_confidence (aubio_pitchyinfft_t * o) {
+ return 1. - o->yinfft->data[o->peak_pos];
+}
+
+uint_t
+aubio_pitchyinfft_set_tolerance (aubio_pitchyinfft_t * p, smpl_t tol)
+{
+ p->tol = tol;
+ return 0;
+}
+
+smpl_t
+aubio_pitchyinfft_get_tolerance (aubio_pitchyinfft_t * p)
+{
+ return p->tol;
}
projects / aubio.git / blobdiff