/*
- Copyright (C) 2003 Paul Brossier
+ Copyright (C) 2003-2014 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.
- 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.
+ 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 "mathutils.h"
+#include "musicutils.h"
#include "config.h"
-void aubio_window(smpl_t *w, uint_t size, aubio_window_type wintype) {
- uint_t i;
+/** Window types */
+typedef enum
+{
+ aubio_win_rectangle,
+ aubio_win_hamming,
+ aubio_win_hanning,
+ aubio_win_hanningz,
+ aubio_win_blackman,
+ aubio_win_blackman_harris,
+ aubio_win_gaussian,
+ aubio_win_welch,
+ aubio_win_parzen,
+ aubio_win_default = aubio_win_hanningz,
+} aubio_window_type;
+
+fvec_t *
+new_aubio_window (char_t * window_type, uint_t length)
+{
+ fvec_t * win = new_fvec (length);
+ uint_t err;
+ if (win == NULL) {
+ return NULL;
+ }
+ err = fvec_set_window (win, window_type);
+ if (err != 0) {
+ del_fvec(win);
+ return NULL;
+ }
+ return win;
+}
+
+uint_t fvec_set_window (fvec_t *win, char_t *window_type) {
+ smpl_t * w = win->data;
+ uint_t i, size = win->length;
+ aubio_window_type wintype;
+ if (window_type == NULL) {
+ AUBIO_ERR ("window type can not be null.\n");
+ return 1;
+ } else if (strcmp (window_type, "rectangle") == 0)
+ wintype = aubio_win_rectangle;
+ else if (strcmp (window_type, "hamming") == 0)
+ wintype = aubio_win_hamming;
+ else if (strcmp (window_type, "hanning") == 0)
+ wintype = aubio_win_hanning;
+ else if (strcmp (window_type, "hanningz") == 0)
+ wintype = aubio_win_hanningz;
+ else if (strcmp (window_type, "blackman") == 0)
+ wintype = aubio_win_blackman;
+ else if (strcmp (window_type, "blackman_harris") == 0)
+ wintype = aubio_win_blackman_harris;
+ else if (strcmp (window_type, "gaussian") == 0)
+ wintype = aubio_win_gaussian;
+ else if (strcmp (window_type, "welch") == 0)
+ wintype = aubio_win_welch;
+ else if (strcmp (window_type, "parzen") == 0)
+ wintype = aubio_win_parzen;
+ else if (strcmp (window_type, "default") == 0)
+ wintype = aubio_win_default;
+ else {
+ AUBIO_ERR ("unknown window type `%s`.\n", window_type);
+ return 1;
+ }
switch(wintype) {
case aubio_win_rectangle:
for (i=0;i<size;i++)
- 0.01168 * COS(3.0*TWO_PI*i/(size-1.0));
break;
case aubio_win_gaussian:
- for (i=0;i<size;i++)
- w[i] = EXP(- 1.0 / SQR(size) * SQR(2.0*i-size));
+ {
+ lsmp_t a, b, c = 0.5;
+ uint_t n;
+ for (n = 0; n < size; n++)
+ {
+ a = (n-c*(size-1))/(SQR(c)*(size-1));
+ b = -c*SQR(a);
+ w[n] = EXP(b);
+ }
+ }
break;
case aubio_win_welch:
for (i=0;i<size;i++)
- w[i] = 1.0 - SQR((2*i-size)/(size+1.0));
+ w[i] = 1.0 - SQR((2.*i-size)/(size+1.0));
break;
case aubio_win_parzen:
for (i=0;i<size;i++)
- w[i] = 1.0 - ABS((2*i-size)/(size+1.0));
+ w[i] = 1.0 - ABS((2.f*i-size)/(size+1.0f));
break;
default:
break;
}
+ return 0;
}
-smpl_t aubio_unwrap2pi(smpl_t phase) {
+smpl_t
+aubio_unwrap2pi (smpl_t phase)
+{
/* mod(phase+pi,-2pi)+pi */
- return phase + TWO_PI * (1. + FLOOR(-(phase+PI)/TWO_PI));
+ return phase + TWO_PI * (1. + FLOOR (-(phase + PI) / TWO_PI));
}
-smpl_t vec_mean(fvec_t *s) {
- uint_t i,j;
- smpl_t tmp = 0.0f;
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++)
- tmp += s->data[i][j];
- return tmp/(smpl_t)(s->length);
+smpl_t
+fvec_mean (fvec_t * s)
+{
+ smpl_t tmp = 0.0;
+#ifndef HAVE_ACCELERATE
+ uint_t j;
+ for (j = 0; j < s->length; j++) {
+ tmp += s->data[j];
+ }
+ return tmp / (smpl_t) (s->length);
+#else
+ aubio_vDSP_meanv(s->data, 1, &tmp, s->length);
+ return tmp;
+#endif /* HAVE_ACCELERATE */
}
-smpl_t vec_sum(fvec_t *s) {
- uint_t i,j;
- smpl_t tmp = 0.0f;
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++)
- tmp += s->data[i][j];
+smpl_t
+fvec_sum (fvec_t * s)
+{
+ smpl_t tmp = 0.0;
+#ifndef HAVE_ACCELERATE
+ uint_t j;
+ for (j = 0; j < s->length; j++) {
+ tmp += s->data[j];
+ }
+#else
+ aubio_vDSP_sve(s->data, 1, &tmp, s->length);
+#endif /* HAVE_ACCELERATE */
return tmp;
}
-smpl_t vec_max(fvec_t *s) {
- uint_t i,j;
- smpl_t tmp = 0.0f;
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++)
- tmp = (tmp > s->data[i][j])? tmp : s->data[i][j];
+smpl_t
+fvec_max (fvec_t * s)
+{
+#ifndef HAVE_ACCELERATE
+ uint_t j;
+ smpl_t tmp = 0.0;
+ for (j = 0; j < s->length; j++) {
+ tmp = (tmp > s->data[j]) ? tmp : s->data[j];
+ }
+#else
+ smpl_t tmp = 0.;
+ aubio_vDSP_maxv(s->data, 1, &tmp, s->length);
+#endif
return tmp;
}
-smpl_t vec_min(fvec_t *s) {
- uint_t i,j;
- smpl_t tmp = s->data[0][0];
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++)
- tmp = (tmp < s->data[i][j])? tmp : s->data[i][j] ;
+smpl_t
+fvec_min (fvec_t * s)
+{
+#ifndef HAVE_ACCELERATE
+ uint_t j;
+ smpl_t tmp = s->data[0];
+ for (j = 0; j < s->length; j++) {
+ tmp = (tmp < s->data[j]) ? tmp : s->data[j];
+ }
+#else
+ smpl_t tmp = 0.;
+ aubio_vDSP_minv(s->data, 1, &tmp, s->length);
+#endif
return tmp;
}
-uint_t vec_min_elem(fvec_t *s) {
- uint_t i,j=0, pos=0.;
- smpl_t tmp = s->data[0][0];
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++) {
- pos = (tmp < s->data[i][j])? pos : j;
- tmp = (tmp < s->data[i][j])? tmp : s->data[i][j] ;
- }
+uint_t
+fvec_min_elem (fvec_t * s)
+{
+#ifndef HAVE_ACCELERATE
+ uint_t j, pos = 0.;
+ smpl_t tmp = s->data[0];
+ for (j = 0; j < s->length; j++) {
+ pos = (tmp < s->data[j]) ? pos : j;
+ tmp = (tmp < s->data[j]) ? tmp : s->data[j];
+ }
+#else
+ smpl_t tmp = 0.;
+ uint_t pos = 0.;
+ aubio_vDSP_minvi(s->data, 1, &tmp, (vDSP_Length *)&pos, s->length);
+#endif
return pos;
}
-uint_t vec_max_elem(fvec_t *s) {
- uint_t i,j=0, pos=0.;
- smpl_t tmp = 0.0f;
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length; j++) {
- pos = (tmp > s->data[i][j])? pos : j;
- tmp = (tmp > s->data[i][j])? tmp : s->data[i][j] ;
- }
+uint_t
+fvec_max_elem (fvec_t * s)
+{
+#ifndef HAVE_ACCELERATE
+ uint_t j, pos = 0;
+ smpl_t tmp = 0.0;
+ for (j = 0; j < s->length; j++) {
+ pos = (tmp > s->data[j]) ? pos : j;
+ tmp = (tmp > s->data[j]) ? tmp : s->data[j];
+ }
+#else
+ smpl_t tmp = 0.;
+ uint_t pos = 0.;
+ aubio_vDSP_maxvi(s->data, 1, &tmp, (vDSP_Length *)&pos, s->length);
+#endif
return pos;
}
-void vec_shift(fvec_t *s) {
- uint_t i,j;
- //smpl_t tmp = 0.0f;
- for (i=0; i < s->channels; i++)
- for (j=0; j < s->length / 2 ; j++) {
- //tmp = s->data[i][j];
- //s->data[i][j] = s->data[i][j+s->length/2];
- //s->data[i][j+s->length/2] = tmp;
- ELEM_SWAP(s->data[i][j],s->data[i][j+s->length/2]);
+void
+fvec_shift (fvec_t * s)
+{
+ uint_t half = s->length / 2, start = half, j;
+ // if length is odd, middle element is moved to the end
+ if (2 * half < s->length) start ++;
+#ifndef HAVE_ATLAS
+ for (j = 0; j < half; j++) {
+ ELEM_SWAP (s->data[j], s->data[j + start]);
+ }
+#else
+ aubio_cblas_swap(half, s->data, 1, s->data + start, 1);
+#endif
+ if (start != half) {
+ for (j = 0; j < half; j++) {
+ ELEM_SWAP (s->data[j + start - 1], s->data[j + start]);
}
+ }
}
-smpl_t vec_local_energy(fvec_t * f) {
- smpl_t locE = 0.;
- uint_t i,j;
- for (i=0;i<f->channels;i++)
- for (j=0;j<f->length;j++)
- locE+=SQR(f->data[i][j]);
- return locE;
+void
+fvec_ishift (fvec_t * s)
+{
+ uint_t half = s->length / 2, start = half, j;
+ // if length is odd, middle element is moved to the beginning
+ if (2 * half < s->length) start ++;
+#ifndef HAVE_ATLAS
+ for (j = 0; j < half; j++) {
+ ELEM_SWAP (s->data[j], s->data[j + start]);
+ }
+#else
+ aubio_cblas_swap(half, s->data, 1, s->data + start, 1);
+#endif
+ if (start != half) {
+ for (j = 0; j < half; j++) {
+ ELEM_SWAP (s->data[half], s->data[j]);
+ }
+ }
}
-smpl_t vec_local_hfc(fvec_t * f) {
- smpl_t locE = 0.;
- uint_t i,j;
- for (i=0;i<f->channels;i++)
- for (j=0;j<f->length;j++)
- locE+=(i+1)*f->data[i][j];
- return locE;
+smpl_t
+aubio_level_lin (const fvec_t * f)
+{
+ smpl_t energy = 0.;
+#ifndef HAVE_ATLAS
+ uint_t j;
+ for (j = 0; j < f->length; j++) {
+ energy += SQR (f->data[j]);
+ }
+#else
+ energy = aubio_cblas_dot(f->length, f->data, 1, f->data, 1);
+#endif
+ return energy / f->length;
+}
+
+smpl_t
+fvec_local_hfc (fvec_t * v)
+{
+ smpl_t hfc = 0.;
+ uint_t j;
+ for (j = 0; j < v->length; j++) {
+ hfc += (j + 1) * v->data[j];
+ }
+ return hfc;
}
-smpl_t vec_alpha_norm(fvec_t * DF, smpl_t alpha) {
+void
+fvec_min_removal (fvec_t * v)
+{
+ smpl_t v_min = fvec_min (v);
+ fvec_add (v, - v_min );
+}
+
+smpl_t
+fvec_alpha_norm (fvec_t * o, smpl_t alpha)
+{
+ uint_t j;
smpl_t tmp = 0.;
- uint_t i,j;
- for (i=0;i<DF->channels;i++)
- for (j=0;j<DF->length;j++)
- tmp += POW(ABS(DF->data[i][j]),alpha);
- return POW(tmp/DF->length,1./alpha);
-}
-
-void vec_dc_removal(fvec_t * mag) {
- smpl_t mini = 0.;
- uint_t length = mag->length, i=0, j;
- mini = vec_min(mag);
- for (j=0;j<length;j++) {
- mag->data[i][j] -= mini;
- }
+ for (j = 0; j < o->length; j++) {
+ tmp += POW (ABS (o->data[j]), alpha);
+ }
+ return POW (tmp / o->length, 1. / alpha);
}
-void vec_alpha_normalise(fvec_t * mag, uint_t alpha) {
- smpl_t alphan = 1.;
- uint_t length = mag->length, i=0, j;
- alphan = vec_alpha_norm(mag,alpha);
- for (j=0;j<length;j++){
- mag->data[i][j] /= alphan;
+void
+fvec_alpha_normalise (fvec_t * o, smpl_t alpha)
+{
+ uint_t j;
+ smpl_t norm = fvec_alpha_norm (o, alpha);
+ for (j = 0; j < o->length; j++) {
+ o->data[j] /= norm;
}
}
-void vec_add(fvec_t * mag, smpl_t threshold) {
- uint_t length = mag->length, i=0, j;
- for (j=0;j<length;j++) {
- mag->data[i][j] += threshold;
+void
+fvec_add (fvec_t * o, smpl_t val)
+{
+ uint_t j;
+ for (j = 0; j < o->length; j++) {
+ o->data[j] += val;
}
}
-void vec_adapt_thres(fvec_t * vec, fvec_t * tmp,
+void fvec_adapt_thres(fvec_t * vec, fvec_t * tmp,
uint_t post, uint_t pre) {
- uint_t length = vec->length, i=0, j;
+ uint_t length = vec->length, j;
for (j=0;j<length;j++) {
- vec->data[i][j] -= vec_moving_thres(vec, tmp, post, pre, j);
+ vec->data[j] -= fvec_moving_thres(vec, tmp, post, pre, j);
}
}
-smpl_t vec_moving_thres(fvec_t * vec, fvec_t * tmpvec,
- uint_t post, uint_t pre, uint_t pos) {
- smpl_t * medar = (smpl_t *)tmpvec->data[0];
+smpl_t
+fvec_moving_thres (fvec_t * vec, fvec_t * tmpvec,
+ uint_t post, uint_t pre, uint_t pos)
+{
uint_t k;
- uint_t win_length = post+pre+1;
- uint_t length = vec->length;
+ smpl_t *medar = (smpl_t *) tmpvec->data;
+ uint_t win_length = post + pre + 1;
+ uint_t length = vec->length;
/* post part of the buffer does not exist */
- if (pos<post+1) {
- for (k=0;k<post+1-pos;k++)
- medar[k] = 0.; /* 0-padding at the beginning */
- for (k=post+1-pos;k<win_length;k++)
- medar[k] = vec->data[0][k+pos-post];
- /* the buffer is fully defined */
- } else if (pos+pre<length) {
- for (k=0;k<win_length;k++)
- medar[k] = vec->data[0][k+pos-post];
- /* pre part of the buffer does not exist */
+ if (pos < post + 1) {
+ for (k = 0; k < post + 1 - pos; k++)
+ medar[k] = 0.; /* 0-padding at the beginning */
+ for (k = post + 1 - pos; k < win_length; k++)
+ medar[k] = vec->data[k + pos - post];
+ /* the buffer is fully defined */
+ } else if (pos + pre < length) {
+ for (k = 0; k < win_length; k++)
+ medar[k] = vec->data[k + pos - post];
+ /* pre part of the buffer does not exist */
} else {
- for (k=0;k<length-pos+post;k++)
- medar[k] = vec->data[0][k+pos-post];
- for (k=length-pos+post;k<win_length;k++)
- medar[k] = 0.; /* 0-padding at the end */
+ for (k = 0; k < length - pos + post; k++)
+ medar[k] = vec->data[k + pos - post];
+ for (k = length - pos + post; k < win_length; k++)
+ medar[k] = 0.; /* 0-padding at the end */
}
- return vec_median(tmpvec);
+ return fvec_median (tmpvec);
}
-smpl_t vec_median(fvec_t * input) {
+smpl_t fvec_median (fvec_t * input) {
uint_t n = input->length;
- smpl_t * arr = (smpl_t *) input->data[0];
+ smpl_t * arr = (smpl_t *) input->data;
uint_t low, high ;
uint_t median;
uint_t middle, ll, hh;
}
}
-smpl_t vec_quadint(fvec_t * x,uint_t pos) {
- uint_t span = 2;
- smpl_t step = 1./200.;
- /* hack : init resold to - something (in case x[pos+-span]<0)) */
- smpl_t res, frac, s0, s1, s2, exactpos = (smpl_t)pos, resold = -1000.;
- if ((pos > span) && (pos < x->length-span)) {
- s0 = x->data[0][pos-span];
- s1 = x->data[0][pos] ;
- s2 = x->data[0][pos+span];
- /* increase frac */
- for (frac = 0.; frac < 2.; frac = frac + step) {
- res = aubio_quadfrac(s0, s1, s2, frac);
- if (res > resold)
- resold = res;
- else {
- exactpos += (frac-step)*2. - 1.;
- break;
- }
- }
- }
- return exactpos;
-}
-
-smpl_t vec_quadint_min(fvec_t * x,uint_t pos, uint_t span) {
- smpl_t step = 1./200.;
- /* init resold to - something (in case x[pos+-span]<0)) */
- smpl_t res, frac, s0, s1, s2, exactpos = (smpl_t)pos, resold = 100000.;
- if ((pos > span) && (pos < x->length-span)) {
- s0 = x->data[0][pos-span];
- s1 = x->data[0][pos] ;
- s2 = x->data[0][pos+span];
- /* increase frac */
- for (frac = 0.; frac < 2.; frac = frac + step) {
- res = aubio_quadfrac(s0, s1, s2, frac);
- if (res < resold) {
- resold = res;
- } else {
- exactpos += (frac-step)*span - span/2.;
- break;
- }
- }
- }
- return exactpos;
-}
-
-smpl_t aubio_quadfrac(smpl_t s0, smpl_t s1, smpl_t s2, smpl_t pf) {
- smpl_t tmp = s0 + (pf/2.) * (pf * ( s0 - 2.*s1 + s2 ) - 3.*s0 + 4.*s1 - s2);
+smpl_t fvec_quadratic_peak_pos (const fvec_t * x, uint_t pos) {
+ smpl_t s0, s1, s2; uint_t x0, x2;
+ smpl_t half = .5, two = 2.;
+ if (pos == 0 || pos == x->length - 1) return pos;
+ x0 = (pos < 1) ? pos : pos - 1;
+ x2 = (pos + 1 < x->length) ? pos + 1 : pos;
+ if (x0 == pos) return (x->data[pos] <= x->data[x2]) ? pos : x2;
+ if (x2 == pos) return (x->data[pos] <= x->data[x0]) ? pos : x0;
+ s0 = x->data[x0];
+ s1 = x->data[pos];
+ s2 = x->data[x2];
+ return pos + half * (s0 - s2 ) / (s0 - two * s1 + s2);
+}
+
+smpl_t fvec_quadratic_peak_mag (fvec_t *x, smpl_t pos) {
+ smpl_t x0, x1, x2;
+ uint_t index = (uint_t)(pos - .5) + 1;
+ if (pos >= x->length || pos < 0.) return 0.;
+ if ((smpl_t)index == pos) return x->data[index];
+ x0 = x->data[index - 1];
+ x1 = x->data[index];
+ x2 = x->data[index + 1];
+ return x1 - .25 * (x0 - x2) * (pos - index);
+}
+
+uint_t fvec_peakpick(const fvec_t * onset, uint_t pos) {
+ uint_t tmp=0;
+ tmp = (onset->data[pos] > onset->data[pos-1]
+ && onset->data[pos] > onset->data[pos+1]
+ && onset->data[pos] > 0.);
return tmp;
}
-uint_t vec_peakpick(fvec_t * onset, uint_t pos) {
- uint_t i=0, tmp=0;
- /*for (i=0;i<onset->channels;i++)*/
- tmp = (onset->data[i][pos] > onset->data[i][pos-1]
- && onset->data[i][pos] > onset->data[i][pos+1]
- && onset->data[i][pos] > 0.);
+smpl_t
+aubio_quadfrac (smpl_t s0, smpl_t s1, smpl_t s2, smpl_t pf)
+{
+ smpl_t tmp =
+ s0 + (pf / 2.) * (pf * (s0 - 2. * s1 + s2) - 3. * s0 + 4. * s1 - s2);
return tmp;
}
-smpl_t aubio_freqtomidi(smpl_t freq) {
+smpl_t
+aubio_freqtomidi (smpl_t freq)
+{
+ smpl_t midi;
+ if (freq < 2. || freq > 100000.) return 0.; // avoid nans and infs
/* log(freq/A-2)/log(2) */
- smpl_t midi = freq/6.875;
- midi = LOG(midi)/0.69314718055995;
+ midi = freq / 6.875;
+ midi = LOG (midi) / 0.69314718055995;
midi *= 12;
midi -= 3;
return midi;
}
-smpl_t aubio_miditofreq(smpl_t midi) {
- smpl_t freq = (midi+3.)/12.;
- freq = EXP(freq*0.69314718055995);
+smpl_t
+aubio_miditofreq (smpl_t midi)
+{
+ smpl_t freq;
+ if (midi > 140.) return 0.; // avoid infs
+ freq = (midi + 3.) / 12.;
+ freq = EXP (freq * 0.69314718055995);
freq *= 6.875;
return freq;
}
-smpl_t aubio_bintofreq(smpl_t bin, smpl_t samplerate, smpl_t fftsize) {
- smpl_t freq = samplerate/fftsize;
- return freq*bin;
+smpl_t
+aubio_bintofreq (smpl_t bin, smpl_t samplerate, smpl_t fftsize)
+{
+ smpl_t freq = samplerate / fftsize;
+ return freq * MAX(bin, 0);
}
-smpl_t aubio_bintomidi(smpl_t bin, smpl_t samplerate, smpl_t fftsize) {
- smpl_t midi = aubio_bintofreq(bin,samplerate,fftsize);
- return aubio_freqtomidi(midi);
+smpl_t
+aubio_bintomidi (smpl_t bin, smpl_t samplerate, smpl_t fftsize)
+{
+ smpl_t midi = aubio_bintofreq (bin, samplerate, fftsize);
+ return aubio_freqtomidi (midi);
}
-smpl_t aubio_freqtobin(smpl_t freq, smpl_t samplerate, smpl_t fftsize) {
- smpl_t bin = fftsize/samplerate;
- return freq*bin;
+smpl_t
+aubio_freqtobin (smpl_t freq, smpl_t samplerate, smpl_t fftsize)
+{
+ smpl_t bin = fftsize / samplerate;
+ return MAX(freq, 0) * bin;
}
-smpl_t aubio_miditobin(smpl_t midi, smpl_t samplerate, smpl_t fftsize) {
- smpl_t freq = aubio_miditofreq(midi);
- return aubio_freqtobin(freq,samplerate,fftsize);
+smpl_t
+aubio_miditobin (smpl_t midi, smpl_t samplerate, smpl_t fftsize)
+{
+ smpl_t freq = aubio_miditofreq (midi);
+ return aubio_freqtobin (freq, samplerate, fftsize);
}
-/** returns 1 if wassilence is 0 and RMS(ibuf)<threshold
- * \bug mono
- */
-uint_t aubio_silence_detection(fvec_t * ibuf, smpl_t threshold) {
- smpl_t loudness = 0;
- uint_t i=0,j;
- for (j=0;j<ibuf->length;j++) {
- loudness += SQR(ibuf->data[i][j]);
+uint_t
+aubio_is_power_of_two (uint_t a)
+{
+ if ((a & (a - 1)) == 0) {
+ return 1;
+ } else {
+ return 0;
}
- loudness = SQRT(loudness);
- loudness /= (smpl_t)ibuf->length;
- loudness = LIN2DB(loudness);
+}
- return (loudness < threshold);
+uint_t
+aubio_next_power_of_two (uint_t a)
+{
+ uint_t i = 1;
+ while (i < a) i <<= 1;
+ return i;
}
-/** returns level log(RMS(ibuf)) if < threshold, 1 otherwise
- * \bug mono
- */
-smpl_t aubio_level_detection(fvec_t * ibuf, smpl_t threshold) {
- smpl_t loudness = 0;
- uint_t i=0,j;
- for (j=0;j<ibuf->length;j++) {
- loudness += SQR(ibuf->data[i][j]);
- }
- loudness = SQRT(loudness);
- loudness /= (smpl_t)ibuf->length;
- loudness = LIN2DB(loudness);
+smpl_t
+aubio_db_spl (const fvec_t * o)
+{
+ return 10. * LOG10 (aubio_level_lin (o));
+}
+
+uint_t
+aubio_silence_detection (const fvec_t * o, smpl_t threshold)
+{
+ return (aubio_db_spl (o) < threshold);
+}
- if (loudness < threshold)
+smpl_t
+aubio_level_detection (const fvec_t * o, smpl_t threshold)
+{
+ smpl_t db_spl = aubio_db_spl (o);
+ if (db_spl < threshold) {
return 1.;
- else
- return loudness;
+ } else {
+ return db_spl;
+ }
}
-smpl_t aubio_zero_crossing_rate(fvec_t * input) {
- uint_t i=0,j;
+smpl_t
+aubio_zero_crossing_rate (fvec_t * input)
+{
+ uint_t j;
uint_t zcr = 0;
- for ( j = 1; j < input->length; j++ ) {
+ for (j = 1; j < input->length; j++) {
// previous was strictly negative
- if( input->data[i][j-1] < 0. ) {
+ if (input->data[j - 1] < 0.) {
// current is positive or null
- if ( input->data[i][j] >= 0. ) {
+ if (input->data[j] >= 0.) {
zcr += 1;
}
- // previous was positive or null
+ // previous was positive or null
} else {
// current is strictly negative
- if ( input->data[i][j] < 0. ) {
+ if (input->data[j] < 0.) {
zcr += 1;
}
}
}
- return zcr/(smpl_t)input->length;
-}
-
-void aubio_autocorr(fvec_t * input, fvec_t * output) {
- uint_t i = 0, j = 0, length = input->length;
- smpl_t * data = input->data[0];
- smpl_t * acf = output->data[0];
- smpl_t tmp =0.;
- for(i=0;i<length;i++){
- for(j=i;j<length;j++){
- tmp += data[j-i]*data[j];
+ return zcr / (smpl_t) input->length;
+}
+
+void
+aubio_autocorr (const fvec_t * input, fvec_t * output)
+{
+ uint_t i, j, length = input->length;
+ smpl_t *data, *acf;
+ smpl_t tmp = 0;
+ data = input->data;
+ acf = output->data;
+ for (i = 0; i < length; i++) {
+ tmp = 0.;
+ for (j = i; j < length; j++) {
+ tmp += data[j - i] * data[j];
}
- acf[i] = tmp /(smpl_t)(length-i);
- tmp = 0.0;
+ acf[i] = tmp / (smpl_t) (length - i);
}
}
-void aubio_cleanup(void) {
-#if FFTW3_SUPPORT
- fftw_cleanup();
+void
+aubio_cleanup (void)
+{
+#ifdef HAVE_FFTW3F
+ fftwf_cleanup ();
#else
-#if FFTW3F_SUPPORT
- fftwf_cleanup();
+#ifdef HAVE_FFTW3
+ fftw_cleanup ();
#endif
#endif
}
projects / aubio.git / blobdiff