source: src/tempo/tempo.c @ ef0a430

feature/autosinkfeature/cnnfeature/cnn_orgfeature/constantqfeature/crepefeature/crepe_orgfeature/pitchshiftfeature/pydocstringsfeature/timestretchfix/ffmpeg5
Last change on this file since ef0a430 was ef0a430, checked in by Paul Brossier <piem@piem.org>, 5 years ago

[tempo] fix delay_ms methods

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File size: 9.2 KB
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[7524d0b]1/*
[e6a78ea]2  Copyright (C) 2006-2009 Paul Brossier <piem@aubio.org>
[7524d0b]3
[e6a78ea]4  This file is part of aubio.
[7524d0b]5
[e6a78ea]6  aubio is free software: you can redistribute it and/or modify
7  it under the terms of the GNU General Public License as published by
8  the Free Software Foundation, either version 3 of the License, or
9  (at your option) any later version.
[7524d0b]10
[e6a78ea]11  aubio is distributed in the hope that it will be useful,
12  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  GNU General Public License for more details.
15
16  You should have received a copy of the GNU General Public License
17  along with aubio.  If not, see <http://www.gnu.org/licenses/>.
[7524d0b]18
19*/
20
21#include "aubio_priv.h"
[6c7d49b]22#include "fvec.h"
23#include "cvec.h"
[31907fd]24#include "spectral/specdesc.h"
[bcf38fe]25#include "tempo/beattracking.h"
[32d6958]26#include "spectral/phasevoc.h"
[3e17aed]27#include "onset/peakpicker.h"
[7524d0b]28#include "mathutils.h"
[32d6958]29#include "tempo/tempo.h"
[7524d0b]30
31/* structure to store object state */
32struct _aubio_tempo_t {
[31907fd]33  aubio_specdesc_t * od;   /** onset detection */
[7524d0b]34  aubio_pvoc_t * pv;             /** phase vocoder */
[8766cb6]35  aubio_peakpicker_t * pp;       /** peak picker */
[7524d0b]36  aubio_beattracking_t * bt;     /** beat tracking */
37  cvec_t * fftgrain;             /** spectral frame */
38  fvec_t * of;                   /** onset detection function value */
39  fvec_t * dfframe;              /** peak picked detection function buffer */
40  fvec_t * out;                  /** beat tactus candidates */
[56ef7e1]41  fvec_t * onset;                /** onset results */
[7524d0b]42  smpl_t silence;                /** silence parameter */
43  smpl_t threshold;              /** peak picking threshold */
44  sint_t blockpos;               /** current position in dfframe */
45  uint_t winlen;                 /** dfframe bufsize */
[43b7c6d]46  uint_t step;                   /** dfframe hopsize */
47  uint_t samplerate;             /** sampling rate of the signal */
[483b883]48  uint_t hop_size;               /** get hop_size */
49  uint_t total_frames;           /** total frames since beginning */
50  uint_t last_beat;              /** time of latest detected beat, in samples */
[7e80dc9]51  sint_t delay;                  /** delay to remove to last beat, in samples */
[95748a6]52  uint_t last_tatum;             /** time of latest detected tatum, in samples */
53  uint_t tatum_signature;        /** number of tatum between each beats */
[7524d0b]54};
55
56/* execute tempo detection function on iput buffer */
[69f74f0]57void aubio_tempo_do(aubio_tempo_t *o, const fvec_t * input, fvec_t * tempo)
[7524d0b]58{
59  uint_t i;
60  uint_t winlen = o->winlen;
61  uint_t step   = o->step;
[e5b9a46]62  fvec_t * thresholded;
[7524d0b]63  aubio_pvoc_do (o->pv, input, o->fftgrain);
[31907fd]64  aubio_specdesc_do (o->od, o->fftgrain, o->of);
[7524d0b]65  /*if (usedoubled) {
[31907fd]66    aubio_specdesc_do(o2,fftgrain, onset2);
[d207300]67    onset->data[0] *= onset2->data[0];
[7524d0b]68  }*/
69  /* execute every overlap_size*step */
70  if (o->blockpos == (signed)step -1 ) {
71    /* check dfframe */
72    aubio_beattracking_do(o->bt,o->dfframe,o->out);
73    /* rotate dfframe */
[43b7c6d]74    for (i = 0 ; i < winlen - step; i++ )
[d207300]75      o->dfframe->data[i] = o->dfframe->data[i+step];
[43b7c6d]76    for (i = winlen - step ; i < winlen; i++ )
[d207300]77      o->dfframe->data[i] = 0.;
[7524d0b]78    o->blockpos = -1;
79  }
80  o->blockpos++;
[56ef7e1]81  aubio_peakpicker_do (o->pp, o->of, o->onset);
[e644757]82  // store onset detection function in second sample of vector
83  //tempo->data[1] = o->onset->data[0];
[e5b9a46]84  thresholded = aubio_peakpicker_get_thresholded_input(o->pp);
[d207300]85  o->dfframe->data[winlen - step + o->blockpos] = thresholded->data[0];
[7524d0b]86  /* end of second level loop */
[d207300]87  tempo->data[0] = 0; /* reset tactus */
[810b3b6]88  //i=0;
[d207300]89  for (i = 1; i < o->out->data[0]; i++ ) {
[7524d0b]90    /* if current frame is a predicted tactus */
[d207300]91    if (o->blockpos == FLOOR(o->out->data[i])) {
92      tempo->data[0] = o->out->data[i] - FLOOR(o->out->data[i]); /* set tactus */
[7524d0b]93      /* test for silence */
94      if (aubio_silence_detection(input, o->silence)==1) {
[ac67de7]95        tempo->data[0] = 0; // unset beat if silent
[7524d0b]96      }
[ac67de7]97      o->last_beat = o->total_frames + (uint_t)ROUND(tempo->data[0] * o->hop_size);
[95748a6]98      o->last_tatum = o->last_beat;
[7524d0b]99    }
100  }
[483b883]101  o->total_frames += o->hop_size;
102  return;
103}
104
105uint_t aubio_tempo_get_last (aubio_tempo_t *o)
106{
[7e80dc9]107  return o->last_beat + o->delay;
[483b883]108}
109
110smpl_t aubio_tempo_get_last_s (aubio_tempo_t *o)
111{
112  return aubio_tempo_get_last (o) / (smpl_t) (o->samplerate);
113}
114
115smpl_t aubio_tempo_get_last_ms (aubio_tempo_t *o)
116{
[47e067b]117  return aubio_tempo_get_last_s (o) * 1000.;
[483b883]118}
119
[7e80dc9]120uint_t aubio_tempo_set_delay(aubio_tempo_t * o, sint_t delay) {
[483b883]121  o->delay = delay;
122  return AUBIO_OK;
123}
124
[7e80dc9]125uint_t aubio_tempo_set_delay_s(aubio_tempo_t * o, smpl_t delay) {
126  o->delay = delay * o->samplerate;
127  return AUBIO_OK;
128}
129
130uint_t aubio_tempo_set_delay_ms(aubio_tempo_t * o, smpl_t delay) {
[ef0a430]131  return aubio_tempo_set_delay_s(o, delay / 1000.);
[7e80dc9]132}
133
[483b883]134uint_t aubio_tempo_get_delay(aubio_tempo_t * o) {
135  return o->delay;
[7524d0b]136}
137
[7e80dc9]138smpl_t aubio_tempo_get_delay_s(aubio_tempo_t * o) {
139  return o->delay / (smpl_t)(o->samplerate);
140}
141
142smpl_t aubio_tempo_get_delay_ms(aubio_tempo_t * o) {
[ef0a430]143  return aubio_tempo_get_delay_s(o) * 1000.;
[7e80dc9]144}
145
[0a257a6]146uint_t aubio_tempo_set_silence(aubio_tempo_t * o, smpl_t silence) {
[7524d0b]147  o->silence = silence;
[0a257a6]148  return AUBIO_OK;
[7524d0b]149}
150
[deb1fd4]151smpl_t aubio_tempo_get_silence(aubio_tempo_t * o) {
152  return o->silence;
153}
154
[0a257a6]155uint_t aubio_tempo_set_threshold(aubio_tempo_t * o, smpl_t threshold) {
[7524d0b]156  o->threshold = threshold;
157  aubio_peakpicker_set_threshold(o->pp, o->threshold);
[0a257a6]158  return AUBIO_OK;
[7524d0b]159}
160
[deb1fd4]161smpl_t aubio_tempo_get_threshold(aubio_tempo_t * o) {
162  return o->threshold;
163}
164
[7524d0b]165/* Allocate memory for an tempo detection */
[69f74f0]166aubio_tempo_t * new_aubio_tempo (const char_t * tempo_mode,
[d207300]167    uint_t buf_size, uint_t hop_size, uint_t samplerate)
[7524d0b]168{
169  aubio_tempo_t * o = AUBIO_NEW(aubio_tempo_t);
[b1559f4c]170  char_t specdesc_func[PATH_MAX];
[d25bd12]171  o->samplerate = samplerate;
[9be906a]172  // check parameters are valid
173  if ((sint_t)hop_size < 1) {
174    AUBIO_ERR("tempo: got hop size %d, but can not be < 1\n", hop_size);
175    goto beach;
[d897aae]176  } else if ((sint_t)buf_size < 2) {
177    AUBIO_ERR("tempo: got window size %d, but can not be < 2\n", buf_size);
[9be906a]178    goto beach;
179  } else if (buf_size < hop_size) {
180    AUBIO_ERR("tempo: hop size (%d) is larger than window size (%d)\n", buf_size, hop_size);
181    goto beach;
182  } else if ((sint_t)samplerate < 1) {
183    AUBIO_ERR("tempo: samplerate (%d) can not be < 1\n", samplerate);
184    goto beach;
185  }
186
[77db425]187  /* length of observations, worth about 6 seconds */
188  o->winlen = aubio_next_power_of_two(5.8 * samplerate / hop_size);
[9be906a]189  if (o->winlen < 4) o->winlen = 4;
[7524d0b]190  o->step = o->winlen/4;
191  o->blockpos = 0;
192  o->threshold = 0.3;
[d25bd12]193  o->silence = -90.;
[483b883]194  o->total_frames = 0;
195  o->last_beat = 0;
196  o->delay = 0;
197  o->hop_size = hop_size;
[d207300]198  o->dfframe  = new_fvec(o->winlen);
199  o->fftgrain = new_cvec(buf_size);
200  o->out      = new_fvec(o->step);
201  o->pv       = new_aubio_pvoc(buf_size, hop_size);
202  o->pp       = new_aubio_peakpicker();
[56ef7e1]203  aubio_peakpicker_set_threshold (o->pp, o->threshold);
[a559796]204  if ( strcmp(tempo_mode, "default") == 0 ) {
[b1559f4c]205    strncpy(specdesc_func, "specflux", PATH_MAX - 1);
[a559796]206  } else {
[b1559f4c]207    strncpy(specdesc_func, tempo_mode, PATH_MAX - 1);
208    specdesc_func[PATH_MAX - 1] = '\0';
[a559796]209  }
210  o->od       = new_aubio_specdesc(specdesc_func,buf_size);
[d207300]211  o->of       = new_fvec(1);
[77db425]212  o->bt       = new_aubio_beattracking(o->winlen, o->hop_size, o->samplerate);
[d207300]213  o->onset    = new_fvec(1);
[7524d0b]214  /*if (usedoubled)    {
[d207300]215    o2 = new_aubio_specdesc(type_onset2,buffer_size);
216    onset2 = new_fvec(1);
[7524d0b]217  }*/
[b5a0479]218  if (!o->dfframe || !o->fftgrain || !o->out || !o->pv ||
219      !o->pp || !o->od || !o->of || !o->bt || !o->onset) {
220    AUBIO_ERR("tempo: failed creating tempo object\n");
221    goto beach;
222  }
[95748a6]223  o->last_tatum = 0;
224  o->tatum_signature = 4;
[7524d0b]225  return o;
[9be906a]226
227beach:
[b5a0479]228  del_aubio_tempo(o);
[9be906a]229  return NULL;
[7524d0b]230}
231
[cb0415d]232smpl_t aubio_tempo_get_bpm(aubio_tempo_t *o) {
233  return aubio_beattracking_get_bpm(o->bt);
234}
235
[42c3dc0]236smpl_t aubio_tempo_get_period (aubio_tempo_t *o)
237{
238  return aubio_beattracking_get_period (o->bt);
239}
240
241smpl_t aubio_tempo_get_period_s (aubio_tempo_t *o)
242{
243  return aubio_beattracking_get_period_s (o->bt);
244}
245
[e34b010]246smpl_t aubio_tempo_get_confidence(aubio_tempo_t *o) {
247  return aubio_beattracking_get_confidence(o->bt);
248}
249
[95748a6]250uint_t aubio_tempo_was_tatum (aubio_tempo_t *o)
251{
252  uint_t last_tatum_distance = o->total_frames - o->last_tatum;
253  smpl_t beat_period = aubio_tempo_get_period(o);
254  smpl_t tatum_period = beat_period / o->tatum_signature;
255  if (last_tatum_distance < o->hop_size) {
256    o->last_tatum = o->last_beat;
257    return 2;
258  }
259  else if (last_tatum_distance > tatum_period) {
260    if ( last_tatum_distance + o->hop_size > beat_period ) {
261      // next beat is too close, pass
262      return 0;
263    }
264    o->last_tatum = o->total_frames;
265    return 1;
266  }
267  return 0;
268}
269
270smpl_t aubio_tempo_get_last_tatum (aubio_tempo_t *o) {
271  return (smpl_t)o->last_tatum - o->delay;
272}
273
274uint_t aubio_tempo_set_tatum_signature (aubio_tempo_t *o, uint_t signature) {
275  if (signature < 1 || signature > 64) {
276    return AUBIO_FAIL;
277  } else {
278    o->tatum_signature = signature;
279    return AUBIO_OK;
280  }
281}
282
[7524d0b]283void del_aubio_tempo (aubio_tempo_t *o)
284{
[b5a0479]285  if (o->od)
286    del_aubio_specdesc(o->od);
287  if (o->bt)
288    del_aubio_beattracking(o->bt);
289  if (o->pp)
290    del_aubio_peakpicker(o->pp);
291  if (o->pv)
292    del_aubio_pvoc(o->pv);
293  if (o->out)
294    del_fvec(o->out);
295  if (o->of)
296    del_fvec(o->of);
297  if (o->fftgrain)
298    del_cvec(o->fftgrain);
299  if (o->dfframe)
300    del_fvec(o->dfframe);
301  if (o->onset)
302    del_fvec(o->onset);
[7524d0b]303  AUBIO_FREE(o);
304}
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