2 Copyright (C) 2003-2009 Paul Brossier <piem@aubio.org>
4 This file is part of aubio.
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.
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.
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/>.
21 #include "aubio_priv.h"
25 #include "mathutils.h"
26 #include "musicutils.h"
27 #include "spectral/phasevoc.h"
28 #include "temporal/filter.h"
29 #include "temporal/c_weighting.h"
30 #include "pitch/pitchmcomb.h"
31 #include "pitch/pitchyin.h"
32 #include "pitch/pitchfcomb.h"
33 #include "pitch/pitchschmitt.h"
34 #include "pitch/pitchyinfft.h"
35 #include "pitch/pitchspecacf.h"
36 #include "pitch/pitch.h"
38 #define DEFAULT_PITCH_SILENCE -50.
40 /** pitch detection algorithms */
43 aubio_pitcht_yin, /**< `yin`, YIN algorithm */
44 aubio_pitcht_mcomb, /**< `mcomb`, Multi-comb filter */
45 aubio_pitcht_schmitt, /**< `schmitt`, Schmitt trigger */
46 aubio_pitcht_fcomb, /**< `fcomb`, Fast comb filter */
47 aubio_pitcht_yinfft, /**< `yinfft`, Spectral YIN */
48 aubio_pitcht_specacf, /**< `specacf`, Spectral autocorrelation */
50 = aubio_pitcht_yinfft, /**< `default` */
53 /** pitch detection output modes */
56 aubio_pitchm_freq, /**< Frequency (Hz) */
57 aubio_pitchm_midi, /**< MIDI note (0.,127) */
58 aubio_pitchm_cent, /**< Cent */
59 aubio_pitchm_bin, /**< Frequency bin (0,bufsize) */
60 aubio_pitchm_default = aubio_pitchm_freq, /**< the one used when "default" is asked */
63 /** callback to get pitch candidate, defined below */
64 typedef void (*aubio_pitch_detect_t) (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
66 /** callback to convert pitch from one unit to another, defined below */
67 typedef smpl_t(*aubio_pitch_convert_t) (smpl_t value, uint_t samplerate, uint_t bufsize);
69 /** callback to fetch the confidence of the algorithm */
70 typedef smpl_t (*aubio_pitch_get_conf_t) (void * p);
72 /** generic pitch detection structure */
75 aubio_pitch_type type; /**< pitch detection mode */
76 aubio_pitch_mode mode; /**< pitch detection output mode */
77 uint_t samplerate; /**< samplerate */
78 uint_t bufsize; /**< buffer size */
79 void *p_object; /**< pointer to pitch object */
80 aubio_filter_t *filter; /**< filter */
81 aubio_pvoc_t *pv; /**< phase vocoder for mcomb */
82 cvec_t *fftgrain; /**< spectral frame for mcomb */
83 fvec_t *buf; /**< temporary buffer for yin */
84 aubio_pitch_detect_t detect_cb; /**< callback to get the pitch candidates */
85 aubio_pitch_convert_t conv_cb; /**< callback to convert it to the desired unit */
86 aubio_pitch_get_conf_t conf_cb; /**< pointer to the current confidence callback */
87 smpl_t silence; /**< silence threshold */
90 /* callback functions for pitch detection */
91 static void aubio_pitch_do_mcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
92 static void aubio_pitch_do_yin (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
93 static void aubio_pitch_do_schmitt (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
94 static void aubio_pitch_do_fcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
95 static void aubio_pitch_do_yinfft (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
96 static void aubio_pitch_do_specacf (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf);
98 /* conversion functions for frequency conversions */
99 smpl_t freqconvbin (smpl_t f, uint_t samplerate, uint_t bufsize);
100 smpl_t freqconvmidi (smpl_t f, uint_t samplerate, uint_t bufsize);
101 smpl_t freqconvpass (smpl_t f, uint_t samplerate, uint_t bufsize);
103 /* adapter to stack ibuf new samples at the end of buf, and trim `buf` to `bufsize` */
104 void aubio_pitch_slideblock (aubio_pitch_t * p, fvec_t * ibuf);
108 new_aubio_pitch (char_t * pitch_mode,
109 uint_t bufsize, uint_t hopsize, uint_t samplerate)
111 aubio_pitch_t *p = AUBIO_NEW (aubio_pitch_t);
112 aubio_pitch_type pitch_type;
113 if (strcmp (pitch_mode, "mcomb") == 0)
114 pitch_type = aubio_pitcht_mcomb;
115 else if (strcmp (pitch_mode, "yinfft") == 0)
116 pitch_type = aubio_pitcht_yinfft;
117 else if (strcmp (pitch_mode, "yin") == 0)
118 pitch_type = aubio_pitcht_yin;
119 else if (strcmp (pitch_mode, "schmitt") == 0)
120 pitch_type = aubio_pitcht_schmitt;
121 else if (strcmp (pitch_mode, "fcomb") == 0)
122 pitch_type = aubio_pitcht_fcomb;
123 else if (strcmp (pitch_mode, "specacf") == 0)
124 pitch_type = aubio_pitcht_specacf;
125 else if (strcmp (pitch_mode, "default") == 0)
126 pitch_type = aubio_pitcht_default;
128 AUBIO_ERR ("unknown pitch detection method %s, using default.\n",
130 pitch_type = aubio_pitcht_default;
132 p->samplerate = samplerate;
133 p->type = pitch_type;
134 aubio_pitch_set_unit (p, "default");
135 p->bufsize = bufsize;
136 p->silence = DEFAULT_PITCH_SILENCE;
139 case aubio_pitcht_yin:
140 p->buf = new_fvec (bufsize);
141 p->p_object = new_aubio_pitchyin (bufsize);
142 p->detect_cb = aubio_pitch_do_yin;
143 p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchyin_get_confidence;
144 aubio_pitchyin_set_tolerance (p->p_object, 0.15);
146 case aubio_pitcht_mcomb:
147 p->pv = new_aubio_pvoc (bufsize, hopsize);
148 p->fftgrain = new_cvec (bufsize);
149 p->p_object = new_aubio_pitchmcomb (bufsize, hopsize);
150 p->filter = new_aubio_filter_c_weighting (samplerate);
151 p->detect_cb = aubio_pitch_do_mcomb;
153 case aubio_pitcht_fcomb:
154 p->buf = new_fvec (bufsize);
155 p->p_object = new_aubio_pitchfcomb (bufsize, hopsize);
156 p->detect_cb = aubio_pitch_do_fcomb;
158 case aubio_pitcht_schmitt:
159 p->buf = new_fvec (bufsize);
160 p->p_object = new_aubio_pitchschmitt (bufsize);
161 p->detect_cb = aubio_pitch_do_schmitt;
163 case aubio_pitcht_yinfft:
164 p->buf = new_fvec (bufsize);
165 p->p_object = new_aubio_pitchyinfft (samplerate, bufsize);
166 p->detect_cb = aubio_pitch_do_yinfft;
167 p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchyinfft_get_confidence;
168 aubio_pitchyinfft_set_tolerance (p->p_object, 0.85);
170 case aubio_pitcht_specacf:
171 p->buf = new_fvec (bufsize);
172 p->p_object = new_aubio_pitchspecacf (bufsize);
173 p->detect_cb = aubio_pitch_do_specacf;
174 p->conf_cb = (aubio_pitch_get_conf_t)aubio_pitchspecacf_get_tolerance;
175 aubio_pitchspecacf_set_tolerance (p->p_object, 0.85);
184 del_aubio_pitch (aubio_pitch_t * p)
187 case aubio_pitcht_yin:
189 del_aubio_pitchyin (p->p_object);
191 case aubio_pitcht_mcomb:
192 del_aubio_pvoc (p->pv);
193 del_cvec (p->fftgrain);
194 del_aubio_filter (p->filter);
195 del_aubio_pitchmcomb (p->p_object);
197 case aubio_pitcht_schmitt:
199 del_aubio_pitchschmitt (p->p_object);
201 case aubio_pitcht_fcomb:
203 del_aubio_pitchfcomb (p->p_object);
205 case aubio_pitcht_yinfft:
207 del_aubio_pitchyinfft (p->p_object);
209 case aubio_pitcht_specacf:
211 del_aubio_pitchspecacf (p->p_object);
220 aubio_pitch_slideblock (aubio_pitch_t * p, fvec_t * ibuf)
222 uint_t j = 0, overlap_size = 0;
223 overlap_size = p->buf->length - ibuf->length;
224 for (j = 0; j < overlap_size; j++) {
225 p->buf->data[j] = p->buf->data[j + ibuf->length];
227 for (j = 0; j < ibuf->length; j++) {
228 p->buf->data[j + overlap_size] = ibuf->data[j];
233 aubio_pitch_set_unit (aubio_pitch_t * p, char_t * pitch_unit)
235 uint_t err = AUBIO_OK;
236 aubio_pitch_mode pitch_mode;
237 if (strcmp (pitch_unit, "freq") == 0)
238 pitch_mode = aubio_pitchm_freq;
239 else if (strcmp (pitch_unit, "hertz") == 0)
240 pitch_mode = aubio_pitchm_freq;
241 else if (strcmp (pitch_unit, "Hertz") == 0)
242 pitch_mode = aubio_pitchm_freq;
243 else if (strcmp (pitch_unit, "Hz") == 0)
244 pitch_mode = aubio_pitchm_freq;
245 else if (strcmp (pitch_unit, "f0") == 0)
246 pitch_mode = aubio_pitchm_freq;
247 else if (strcmp (pitch_unit, "midi") == 0)
248 pitch_mode = aubio_pitchm_midi;
249 else if (strcmp (pitch_unit, "cent") == 0)
250 pitch_mode = aubio_pitchm_cent;
251 else if (strcmp (pitch_unit, "bin") == 0)
252 pitch_mode = aubio_pitchm_bin;
253 else if (strcmp (pitch_unit, "default") == 0)
254 pitch_mode = aubio_pitchm_default;
256 AUBIO_ERR ("unknown pitch detection unit %s, using default\n", pitch_unit);
257 pitch_mode = aubio_pitchm_default;
260 p->mode = pitch_mode;
262 case aubio_pitchm_freq:
263 p->conv_cb = freqconvpass;
265 case aubio_pitchm_midi:
266 p->conv_cb = freqconvmidi;
268 case aubio_pitchm_cent:
269 /* bug: not implemented */
270 p->conv_cb = freqconvmidi;
272 case aubio_pitchm_bin:
273 p->conv_cb = freqconvbin;
282 aubio_pitch_set_tolerance (aubio_pitch_t * p, smpl_t tol)
285 case aubio_pitcht_yin:
286 aubio_pitchyin_set_tolerance (p->p_object, tol);
288 case aubio_pitcht_yinfft:
289 aubio_pitchyinfft_set_tolerance (p->p_object, tol);
298 aubio_pitch_set_silence (aubio_pitch_t * p, smpl_t silence)
300 if (silence < 0 && silence > -200) {
301 p->silence = silence;
304 AUBIO_ERR("pitch: could do set silence to %.2f", silence);
310 aubio_pitch_get_silence (aubio_pitch_t * p)
316 /* do method, calling the detection callback, then the conversion callback */
318 aubio_pitch_do (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
320 p->detect_cb (p, ibuf, obuf);
321 if (aubio_silence_detection(ibuf, p->silence) == 1) {
324 obuf->data[0] = p->conv_cb (obuf->data[0], p->samplerate, p->bufsize);
327 /* do method for each algorithm */
329 aubio_pitch_do_mcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
331 aubio_filter_do (p->filter, ibuf);
332 aubio_pvoc_do (p->pv, ibuf, p->fftgrain);
333 aubio_pitchmcomb_do (p->p_object, p->fftgrain, obuf);
334 obuf->data[0] = aubio_bintofreq (obuf->data[0], p->samplerate, p->bufsize);
338 aubio_pitch_do_yin (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
341 aubio_pitch_slideblock (p, ibuf);
342 aubio_pitchyin_do (p->p_object, p->buf, obuf);
343 pitch = obuf->data[0];
345 pitch = p->samplerate / (pitch + 0.);
349 obuf->data[0] = pitch;
354 aubio_pitch_do_yinfft (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * obuf)
357 aubio_pitch_slideblock (p, ibuf);
358 aubio_pitchyinfft_do (p->p_object, p->buf, obuf);
359 pitch = obuf->data[0];
361 pitch = p->samplerate / (pitch + 0.);
365 obuf->data[0] = pitch;
369 aubio_pitch_do_specacf (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * out)
371 smpl_t pitch = 0., period;
372 aubio_pitch_slideblock (p, ibuf);
373 aubio_pitchspecacf_do (p->p_object, p->buf, out);
374 //out->data[0] = aubio_bintofreq (out->data[0], p->samplerate, p->bufsize);
375 period = out->data[0];
377 pitch = p->samplerate / period;
381 out->data[0] = pitch;
385 aubio_pitch_do_fcomb (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * out)
387 aubio_pitch_slideblock (p, ibuf);
388 aubio_pitchfcomb_do (p->p_object, p->buf, out);
389 out->data[0] = aubio_bintofreq (out->data[0], p->samplerate, p->bufsize);
393 aubio_pitch_do_schmitt (aubio_pitch_t * p, fvec_t * ibuf, fvec_t * out)
395 smpl_t period, pitch = 0.;
396 aubio_pitch_slideblock (p, ibuf);
397 aubio_pitchschmitt_do (p->p_object, p->buf, out);
398 period = out->data[0];
400 pitch = p->samplerate / period;
404 out->data[0] = pitch;
407 /* conversion callbacks */
409 freqconvbin(smpl_t f, uint_t samplerate, uint_t bufsize)
411 return aubio_freqtobin(f, samplerate, bufsize);
415 freqconvmidi (smpl_t f, uint_t samplerate UNUSED, uint_t bufsize UNUSED)
417 return aubio_freqtomidi (f);
421 freqconvpass (smpl_t f, uint_t samplerate UNUSED, uint_t bufsize UNUSED)
426 /* confidence callbacks */
428 aubio_pitch_get_confidence (aubio_pitch_t * p)
431 return p->conf_cb(p->p_object);