/*
- Copyright (C) 2003-20
09 Paul Brossier <piem@aubio.org>
+ Copyright (C) 2003-20
13 Paul Brossier <piem@aubio.org>
This file is part of aubio.
{
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 */
+ 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)
+new_aubio_pitchyinfft (uint_t samplerate, uint_t bufsize)
{
+ 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, 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->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, 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]));
+ 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;
}
void
-aubio_pitchyinfft_do (aubio_pitchyinfft_t * p, fvec_t * input, fvec_t * output)
+aubio_pitchyinfft_do (aubio_pitchyinfft_t * p, const fvec_t * input, fvec_t * output)
{
- uint_t i, tau, l;
+ uint_t tau, l;
+ uint_t length = p->fftout->length;
uint_t halfperiod;
- smpl_t tmp, sum;
- cvec_t *res = (cvec_t *) p->res;
- fvec_t *yin = (fvec_t *) p->yinfft;
- for (i = 0; i < input->channels; i++) {
- l = 0;
- tmp = 0.;
- sum = 0.;
- for (l = 0; l < input->length; l++) {
- p->winput->data[0][l] = p->win->data[0][l] * input->data[i][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];
- }
- 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;
+ 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];
+ }
+ 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.;
+ // 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] < p->tol) {
- /* no interpolation */
- //return tau;
- /* 3 point quadratic interpolation */
- //return fvec_quadint_min(yin,tau,1);
- /* additional check for (unlikely) octave doubling in higher frequencies */
- if (tau > 35) {
- output->data[i][0] = fvec_quadint (yin, tau, i);
- } else {
- /* should compare the minimum value of each interpolated peaks */
- halfperiod = FLOOR (tau / 2 + .5);
- if (yin->data[0][halfperiod] < p->tol)
- output->data[i][0] = fvec_quadint (yin, halfperiod, i);
- else
- output->data[i][0] = fvec_quadint (yin, tau, i);
- }
+ }
+ // 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 > p->short_period) {
+ output->data[0] = fvec_quadratic_peak_pos (yin, tau);
} else {
- output->data[i][0] = 0.;
+ /* should compare the minimum value of each interpolated peaks */
+ halfperiod = FLOOR (tau / 2 + .5);
+ if (yin->data[halfperiod] < p->tol)
+ p->peak_pos = halfperiod;
+ else
+ p->peak_pos = tau;
+ output->data[0] = fvec_quadratic_peak_pos (yin, p->peak_pos);
}
+ } else {
+ p->peak_pos = 0;
+ output->data[0] = 0.;
}
}
del_aubio_fft (p->fft);
del_fvec (p->yinfft);
del_fvec (p->sqrmag);
- del_cvec (p->res);
- del_cvec (p->fftout);
+ 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)
{
projects / aubio.git / blobdiff