source: src/pitch/pitchmcomb.c @ 29808b1

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5pitchshiftsamplertimestretchyinfft+
Last change on this file since 29808b1 was 56ef7e1, checked in by Paul Brossier <piem@piem.org>, 15 years ago

Change peakpicker to match API specs, make quadint per channel

  • src/mathutils.c
    • add per channel mean and median
    • update moving thres and adapt_thres accordingly
    • change quadint unused span argument to a channel argument
  • src/onset/onset.c:
    • make wasonset a vector for multi channel, use new peakpicker
  • src/onset/peakpick.c:
    • update peakpicker do for multi channeling
  • src/pitch/: update use to fvec_quadint
  • src/tempo/beattracking.c: update calls to fvec_quadint
  • src/tempo/tempo.c: update peakpicker usage
  • tests/src/test-peakpick.c: update peakpicker usage
  • Property mode set to 100644
File size: 14.4 KB
Line 
1/*
2   Copyright (C) 2003 Paul Brossier
3
4   This program is free software; you can redistribute it and/or modify
5   it under the terms of the GNU General Public License as published by
6   the Free Software Foundation; either version 2 of the License, or
7   (at your option) any later version.
8
9   This program is distributed in the hope that it will be useful,
10   but WITHOUT ANY WARRANTY; without even the implied warranty of
11   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12   GNU General Public License for more details.
13
14   You should have received a copy of the GNU General Public License
15   along with this program; if not, write to the Free Software
16   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18*/
19
20#include "aubio_priv.h"
21#include "fvec.h"
22#include "cvec.h"
23#include "mathutils.h"
24#include "pitch/pitchmcomb.h"
25
26#define CAND_SWAP(a,b) { register aubio_spectralcandidate_t *t=(a);(a)=(b);(b)=t; }
27
28typedef struct _aubio_spectralpeak_t aubio_spectralpeak_t;
29typedef struct _aubio_spectralcandidate_t aubio_spectralcandidate_t;
30uint_t aubio_pitchmcomb_get_root_peak(aubio_spectralpeak_t * peaks, uint_t length);
31uint_t aubio_pitchmcomb_quadpick(aubio_spectralpeak_t * spectral_peaks, fvec_t * X);
32void aubio_pitchmcomb_spectral_pp(aubio_pitchmcomb_t * p, fvec_t * oldmag);
33void aubio_pitchmcomb_combdet(aubio_pitchmcomb_t * p, fvec_t * newmag);
34/* not used but useful : sort by amplitudes (or anything else)
35 * sort_pitchpeak(peaks, length);
36 */
37/** spectral_peak comparison function (must return signed int) */
38static sint_t aubio_pitchmcomb_sort_peak_comp(const void *x, const void *y);
39/** sort spectral_peak against their mag */
40void aubio_pitchmcomb_sort_peak(aubio_spectralpeak_t * peaks, uint_t nbins);
41/** select the best candidates */
42uint_t aubio_pitch_cands(aubio_pitchmcomb_t * p, cvec_t * fftgrain, smpl_t * cands);
43
44/** sort spectral_candidate against their comb ene */
45void aubio_pitchmcomb_sort_cand_ene(aubio_spectralcandidate_t ** candidates, uint_t nbins);
46/** sort spectral_candidate against their frequency */
47void aubio_pitchmcomb_sort_cand_freq(aubio_spectralcandidate_t ** candidates, uint_t nbins);
48
49struct _aubio_pitchmcomb_t {
50  smpl_t threshold;                        /**< offset threshold [0.033 or 0.01]     */
51  smpl_t alpha;                            /**< normalisation exponent [9]           */
52  smpl_t cutoff;                           /**< low-pass filter cutoff [0.34, 1]     */
53  smpl_t tol;                              /**< tolerance [0.05]                     */
54  // smpl_t tau;                              /**< frequency precision [44100/4096]     */
55  uint_t win_post;                         /**< median filter window length          */
56  uint_t win_pre;                          /**< median filter window                 */
57  uint_t ncand;                            /**< maximum number of candidates (combs) */
58  uint_t npartials;                        /**< maximum number of partials per combs */
59  uint_t count;                            /**< picked picks                         */
60  uint_t goodcandidate;                    /**< best candidate                       */
61  uint_t spec_partition;                   /**< spectrum partition to consider       */
62  aubio_spectralpeak_t * peaks;            /**< up to length win/spec_partition      */
63  aubio_spectralcandidate_t ** candidates; /** up to five candidates                 */
64  /* some scratch pads */
65  /** \bug  (unnecessary copied from fftgrain?) */
66  fvec_t * newmag;                         /**< vec to store mag                     */
67  fvec_t * scratch;                        /**< vec to store modified mag            */
68  fvec_t * scratch2;                       /**< vec to compute moving median         */
69  fvec_t * theta;                         /**< vec to store phase                     */
70  smpl_t phasediff;
71  smpl_t phasefreq;
72  /** threshfn: name or handle of fn for computing adaptive threshold [median] */
73  /** aubio_thresholdfn_t thresholdfn; */
74  /** picker: name or handle of fn for picking event times [quadpick] */
75  /** aubio_pickerfn_t pickerfn; */
76};
77
78/** spectral peak object */
79struct _aubio_spectralpeak_t {
80  uint_t bin;     /**< bin [0-(length-1)] */
81  smpl_t ebin;    /**< estimated bin */
82  smpl_t mag;     /**< peak magnitude */
83};
84
85/** spectral candidates array object */
86struct _aubio_spectralcandidate_t {
87  smpl_t ebin;    /**< interpolated bin */
88  smpl_t * ecomb; /**< comb */
89  smpl_t ene;     /**< candidate energy */
90  smpl_t len;     /**< length */
91};
92
93
94void aubio_pitchmcomb_do (aubio_pitchmcomb_t * p, cvec_t * fftgrain, fvec_t * output) {
95  uint_t i,j;
96  smpl_t instfreq;
97  fvec_t * newmag = (fvec_t *)p->newmag;
98  //smpl_t hfc; //fe=instfreq(theta1,theta,ops); //theta1=theta;
99  /* copy incoming grain to newmag */
100  for (i=0; i< fftgrain->channels; i++) {
101  for (j=0; j< newmag->length; j++)
102    newmag->data[0][j]=fftgrain->norm[i][j];
103  /* detect only if local energy > 10. */
104  //if (fvec_local_energy(newmag)>10.) {
105    //hfc = fvec_local_hfc(newmag); //not used
106    aubio_pitchmcomb_spectral_pp(p, newmag);
107    aubio_pitchmcomb_combdet(p,newmag);
108    //aubio_pitchmcomb_sort_cand_freq(p->candidates,p->ncand);
109    //return p->candidates[p->goodcandidate]->ebin;
110  j = (uint_t)FLOOR(p->candidates[p->goodcandidate]->ebin+.5);
111  instfreq  = aubio_unwrap2pi(fftgrain->phas[i][j]
112      - p->theta->data[i][j] - j*p->phasediff);
113  instfreq *= p->phasefreq;
114  /* store phase for next run */
115  for (j=0; j< p->theta->length; j++) {
116    p->theta->data[i][j]=fftgrain->phas[i][j];
117  }
118  //return p->candidates[p->goodcandidate]->ebin;
119  output->data[i][0] = FLOOR(p->candidates[p->goodcandidate]->ebin+.5) + instfreq;
120  /*} else {
121    return -1.;
122  }*/
123  }
124}
125
126uint_t aubio_pitch_cands(aubio_pitchmcomb_t * p, cvec_t * fftgrain,
127    smpl_t * cands) {
128  uint_t i=0,j;
129  uint_t k;
130  fvec_t * newmag = (fvec_t *)p->newmag;
131  aubio_spectralcandidate_t ** scands =
132    (aubio_spectralcandidate_t **)(p->candidates);
133  //smpl_t hfc; //fe=instfreq(theta1,theta,ops); //theta1=theta;
134  /* copy incoming grain to newmag */
135  for (j=0; j< newmag->length; j++)
136    newmag->data[i][j]=fftgrain->norm[i][j];
137  /* detect only if local energy > 10. */
138  if (fvec_local_energy(newmag)>10.) {
139    /* hfc = fvec_local_hfc(newmag); do not use */
140    aubio_pitchmcomb_spectral_pp(p, newmag);
141    aubio_pitchmcomb_combdet(p,newmag);
142    aubio_pitchmcomb_sort_cand_freq(scands,p->ncand);
143    /* store ncand comb energies in cands[1:ncand] */
144    for (k = 0; k<p->ncand; k++)
145      cands[k] = p->candidates[k]->ene;
146    /* store ncand[end] freq in cands[end] */
147    cands[p->ncand] = p->candidates[p->ncand-1]->ebin;
148    return 1;
149  } else {
150    for (k = 0; k<p->ncand; k++)
151      cands[k] = 0;
152    return 0;
153  }
154}
155
156void aubio_pitchmcomb_spectral_pp(aubio_pitchmcomb_t * p, fvec_t * newmag) {
157  fvec_t * mag = (fvec_t *)p->scratch;
158  fvec_t * tmp = (fvec_t *)p->scratch2;
159  uint_t i=0,j;
160  uint_t length = mag->length;
161  /* copy newmag to mag (scracth) */
162  for (j=0;j<length;j++) {
163    mag->data[i][j] = newmag->data[i][j];
164  }
165  fvec_min_removal(mag);              /* min removal          */
166  fvec_alpha_normalise(mag,p->alpha); /* alpha normalisation  */
167  /* skipped */                       /* low pass filtering   */
168  /** \bug fvec_moving_thres may write out of bounds */
169  fvec_adapt_thres(mag,tmp,p->win_post,p->win_pre,i); /* adaptative threshold */
170  fvec_add(mag,-p->threshold);        /* fixed threshold      */
171  {
172    aubio_spectralpeak_t * peaks = (aubio_spectralpeak_t *)p->peaks;
173    uint_t count;
174    /*  return bin and ebin */
175    count = aubio_pitchmcomb_quadpick(peaks,mag);
176    for (j=0;j<count;j++)
177      peaks[j].mag = newmag->data[i][peaks[j].bin];
178    /* reset non peaks */
179    for (j=count;j<length;j++)
180      peaks[j].mag = 0.;
181    p->peaks = peaks;
182    p->count = count;
183  }
184}
185
186void aubio_pitchmcomb_combdet(aubio_pitchmcomb_t * p, fvec_t * newmag) {
187  aubio_spectralpeak_t * peaks = (aubio_spectralpeak_t *)p->peaks;
188  aubio_spectralcandidate_t ** candidate =
189    (aubio_spectralcandidate_t **)p->candidates;
190
191  /* parms */
192  uint_t N = p->npartials; /* maximum number of partials to be considered 10 */
193  uint_t M = p->ncand;  /* maximum number of combs to be considered 5 */
194  uint_t length = newmag->length;
195  uint_t count = p->count;
196  uint_t k;
197  uint_t l;
198  uint_t d;
199  uint_t curlen = 0;
200
201  smpl_t delta2;
202  smpl_t xx;
203  uint_t position = 0;
204
205  uint_t root_peak = 0;
206  uint_t tmpl = 0;
207  smpl_t tmpene = 0.;
208
209  /* get the biggest peak in the spectrum */
210  root_peak = aubio_pitchmcomb_get_root_peak(peaks,count);
211  /* not enough partials in highest notes, could be forced */
212  //if (peaks[root_peak].ebin >= aubio_miditofreq(85.)/p->tau) N=2;
213  //if (peaks[root_peak].ebin >= aubio_miditofreq(90.)/p->tau) N=1;
214  /* now calculate the energy of each of the 5 combs */
215  for (l=0;l<M;l++) {
216    smpl_t scaler = (1./(l+1.));
217    candidate[l]->ene = 0.; /* reset ene and len sums */
218    candidate[l]->len = 0.;
219    candidate[l]->ebin=scaler*peaks[root_peak].ebin;
220    /* if less than N peaks available, curlen < N */
221    if (candidate[l]->ebin != 0.)
222      curlen = (uint_t)FLOOR(length/(candidate[l]->ebin));
223    curlen = (N < curlen )? N : curlen;
224    /* fill candidate[l]->ecomb[k] with (k+1)*candidate[l]->ebin */
225    for (k=0;k<curlen;k++)
226      candidate[l]->ecomb[k]=(candidate[l]->ebin)*(k+1.);
227    for (k=curlen;k<length;k++)
228      candidate[l]->ecomb[k]=0.;
229    /* for each in candidate[l]->ecomb[k] */
230    for (k=0;k<curlen;k++) {
231      xx = 100000.;
232      /** get the candidate->ecomb the closer to peaks.ebin
233       * (to cope with the inharmonicity)*/
234      for (d=0;d<count;d++) {
235        delta2 = ABS(candidate[l]->ecomb[k]-peaks[d].ebin);
236        if (delta2 <= xx) {
237          position = d;
238          xx = delta2;
239        }
240      }
241      /* for a Q factor of 17, maintaining "constant Q filtering",
242       * and sum energy and length over non null combs */
243      if ( 17. * xx < candidate[l]->ecomb[k] ) {
244        candidate[l]->ecomb[k]=peaks[position].ebin;
245        candidate[l]->ene += /* ecomb rounded to nearest int */
246          POW(newmag->data[0][(uint_t)FLOOR(candidate[l]->ecomb[k]+.5)],0.25);
247        candidate[l]->len += 1./curlen;
248      } else
249        candidate[l]->ecomb[k]=0.;
250    }
251    /* punishment */
252    /*if (candidate[l]->len<0.6)
253      candidate[l]->ene=0.; */
254    /* remember best candidate energy (in polyphonic, could check for
255     * tmpene*1.1 < candidate->ene to reduce jumps towards low frequencies) */
256    if (tmpene < candidate[l]->ene) {
257      tmpl = l;
258      tmpene = candidate[l]->ene;
259    }
260  }
261  //p->candidates=candidate;
262  //p->peaks=peaks;
263  p->goodcandidate = tmpl;
264}
265
266/** T=quadpick(X): return indices of elements of X which are peaks and positive
267 * exact peak positions are retrieved by quadratic interpolation
268 *
269 * \bug peak-picking too picky, sometimes counts too many peaks ?
270 */
271uint_t aubio_pitchmcomb_quadpick(aubio_spectralpeak_t * spectral_peaks, fvec_t * X){
272  uint_t i, j, ispeak, count = 0;
273  for (i=0;i<X->channels;i++)
274    for (j=1;j<X->length-1;j++) {
275      ispeak = fvec_peakpick(X,j);
276      if (ispeak) {
277        count += ispeak;
278        spectral_peaks[count-1].bin = j;
279        spectral_peaks[count-1].ebin = fvec_quadint(X, j, i) - 1.;
280      }
281    }
282  return count;
283}
284
285/* get predominant partial */
286uint_t aubio_pitchmcomb_get_root_peak(aubio_spectralpeak_t * peaks, uint_t length) {
287  uint_t i,pos=0;
288  smpl_t tmp = 0.;
289  for (i=0;i<length;i++)
290    if (tmp <= peaks[i].mag) {
291      pos = i;
292      tmp = peaks[i].mag;
293    }
294  return pos;
295}
296
297void aubio_pitchmcomb_sort_peak(aubio_spectralpeak_t * peaks, uint_t nbins) {
298  qsort(peaks, nbins, sizeof(aubio_spectralpeak_t),
299      aubio_pitchmcomb_sort_peak_comp);
300}
301static sint_t aubio_pitchmcomb_sort_peak_comp(const void *x, const void *y) {
302  return (((aubio_spectralpeak_t *)y)->mag - ((aubio_spectralpeak_t *)x)->mag);
303}
304
305
306void aubio_pitchmcomb_sort_cand_ene(aubio_spectralcandidate_t ** candidates, uint_t nbins) {
307  uint_t cur = 0;
308  uint_t run = 0;
309  for (cur=0;cur<nbins;cur++) {
310    run = cur + 1;
311    for (run=cur;run<nbins;run++) {
312      if(candidates[run]->ene > candidates[cur]->ene)
313        CAND_SWAP(candidates[run], candidates[cur]);
314    }
315  }
316}
317
318
319void aubio_pitchmcomb_sort_cand_freq(aubio_spectralcandidate_t ** candidates, uint_t nbins) {
320  uint_t cur = 0;
321  uint_t run = 0;
322  for (cur=0;cur<nbins;cur++) {
323    run = cur + 1;
324    for (run=cur;run<nbins;run++) {
325      if(candidates[run]->ebin < candidates[cur]->ebin)
326        CAND_SWAP(candidates[run], candidates[cur]);
327    }
328  }
329}
330
331aubio_pitchmcomb_t * new_aubio_pitchmcomb(uint_t bufsize, uint_t hopsize, uint_t channels) {
332  aubio_pitchmcomb_t * p = AUBIO_NEW(aubio_pitchmcomb_t);
333  /* bug: should check if size / 8 > post+pre+1 */
334  uint_t i, j;
335  uint_t spec_size;
336  p->spec_partition   = 4;
337  p->ncand            = 5;
338  p->npartials        = 5;
339  p->cutoff           = 1.;
340  p->threshold        = 0.01;
341  p->win_post         = 8;
342  p->win_pre          = 7;
343  // p->tau              = samplerate/bufsize;
344  p->alpha            = 9.;
345  p->goodcandidate    = 0;
346  p->phasefreq        = bufsize/hopsize/TWO_PI;
347  p->phasediff        = TWO_PI*hopsize/bufsize;
348  spec_size = bufsize/p->spec_partition;
349  //p->pickerfn = quadpick;
350  //p->biquad = new_biquad(0.1600,0.3200,0.1600, -0.5949, 0.2348);
351  /* allocate temp memory */
352  p->newmag     = new_fvec(spec_size,1);
353  /* array for median */
354  p->scratch    = new_fvec(spec_size,1);
355  /* array for phase */
356  p->theta      = new_fvec(spec_size,channels);
357  /* array for adaptative threshold */
358  p->scratch2   = new_fvec(p->win_post+p->win_pre+1,1);
359  /* array of spectral peaks */
360  p->peaks      = AUBIO_ARRAY(aubio_spectralpeak_t,spec_size);
361  for (i = 0; i < spec_size; i++) {
362    p->peaks[i].bin = 0.;
363    p->peaks[i].ebin = 0.;
364    p->peaks[i].mag = 0.;
365  }
366  /* array of pointers to spectral candidates */
367  p->candidates = AUBIO_ARRAY(aubio_spectralcandidate_t *,p->ncand);
368  for (i=0;i<p->ncand;i++) {
369    p->candidates[i] = AUBIO_NEW(aubio_spectralcandidate_t);
370    p->candidates[i]->ecomb = AUBIO_ARRAY(smpl_t, spec_size);
371    for (j=0; j < spec_size; j++) {
372      p->candidates[i]->ecomb[j] = 0.;
373    }
374    p->candidates[i]->ene = 0.;
375    p->candidates[i]->ebin = 0.;
376    p->candidates[i]->len = 0.;
377  }
378  return p;
379}
380
381
382void del_aubio_pitchmcomb (aubio_pitchmcomb_t *p) {
383  uint_t i;
384  del_fvec(p->newmag);
385  del_fvec(p->scratch);
386  del_fvec(p->theta);
387  del_fvec(p->scratch2);
388  AUBIO_FREE(p->peaks);
389  for (i=0;i<p->ncand;i++) {
390    AUBIO_FREE(p->candidates[i]->ecomb);
391    AUBIO_FREE(p->candidates[i]);
392  }
393  AUBIO_FREE(p->candidates);
394  AUBIO_FREE(p);
395}
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