source: src/io/source_sndfile.c @ c0a1906

feature/autosinkfeature/constantqfeature/pitchshiftfeature/timestretch
Last change on this file since c0a1906 was c0a1906, checked in by Paul Brossier <piem@piem.org>, 9 months ago

[source] simplify and avoid unrequired checks

  • Property mode set to 100644
File size: 10.3 KB
Line 
1/*
2  Copyright (C) 2012 Paul Brossier <piem@aubio.org>
3
4  This file is part of aubio.
5
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.
10
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/>.
18
19*/
20
21#include "aubio_priv.h"
22
23#ifdef HAVE_SNDFILE
24
25#include <sndfile.h>
26
27#include "fvec.h"
28#include "fmat.h"
29#include "source_sndfile.h"
30
31#include "temporal/resampler.h"
32
33#define MAX_SIZE 4096
34#define MAX_SAMPLES AUBIO_MAX_CHANNELS * MAX_SIZE
35
36#if !HAVE_AUBIO_DOUBLE
37#define aubio_sf_read_smpl sf_read_float
38#else /* HAVE_AUBIO_DOUBLE */
39#define aubio_sf_read_smpl sf_read_double
40#endif /* HAVE_AUBIO_DOUBLE */
41
42struct _aubio_source_sndfile_t {
43  uint_t hop_size;
44  uint_t samplerate;
45  uint_t channels;
46
47  // some data about the file
48  char_t *path;
49  SNDFILE *handle;
50  int input_samplerate;
51  int input_channels;
52  int input_format;
53  int duration;
54
55  // resampling stuff
56  smpl_t ratio;
57  uint_t input_hop_size;
58#ifdef HAVE_SAMPLERATE
59  aubio_resampler_t **resamplers;
60  fvec_t *input_data;
61  fmat_t *input_mat;
62#endif /* HAVE_SAMPLERATE */
63
64  // some temporary memory for sndfile to write at
65  uint_t scratch_size;
66  smpl_t *scratch_data;
67};
68
69aubio_source_sndfile_t * new_aubio_source_sndfile(const char_t * path, uint_t samplerate, uint_t hop_size) {
70  aubio_source_sndfile_t * s = AUBIO_NEW(aubio_source_sndfile_t);
71  SF_INFO sfinfo;
72
73  if (path == NULL) {
74    AUBIO_ERR("source_sndfile: Aborted opening null path\n");
75    goto beach;
76  }
77  if ((sint_t)samplerate < 0) {
78    AUBIO_ERR("source_sndfile: Can not open %s with samplerate %d\n", path, samplerate);
79    goto beach;
80  }
81  if ((sint_t)hop_size <= 0) {
82    AUBIO_ERR("source_sndfile: Can not open %s with hop_size %d\n", path, hop_size);
83    goto beach;
84  }
85
86  s->hop_size = hop_size;
87  s->channels = 1;
88
89  s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
90  strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
91
92  // try opening the file, getting the info in sfinfo
93  AUBIO_MEMSET(&sfinfo, 0, sizeof (sfinfo));
94  s->handle = sf_open (s->path, SFM_READ, &sfinfo);
95
96  if (s->handle == NULL) {
97    /* show libsndfile err msg */
98    AUBIO_ERR("source_sndfile: Failed opening %s (%s)\n", s->path,
99        sf_strerror (NULL));
100    goto beach;
101  }
102
103  /* get input specs */
104  s->input_samplerate = sfinfo.samplerate;
105  s->input_channels   = sfinfo.channels;
106  s->input_format     = sfinfo.format;
107  s->duration         = sfinfo.frames;
108
109  if (samplerate == 0) {
110    s->samplerate = s->input_samplerate;
111    //AUBIO_DBG("sampling rate set to 0, automagically adjusting to %d\n", samplerate);
112  } else {
113    s->samplerate = samplerate;
114  }
115  /* compute input block size required before resampling */
116  s->ratio = s->samplerate/(smpl_t)s->input_samplerate;
117  s->input_hop_size = (uint_t)FLOOR(s->hop_size / s->ratio + .5);
118
119  if (s->input_hop_size * s->input_channels > MAX_SAMPLES) {
120    AUBIO_ERR("source_sndfile: Not able to process more than %d frames of %d channels\n",
121        MAX_SAMPLES / s->input_channels, s->input_channels);
122    goto beach;
123  }
124
125#ifdef HAVE_SAMPLERATE
126  s->input_data = NULL;
127  s->input_mat = NULL;
128  s->resamplers = NULL;
129  if (s->ratio != 1) {
130    uint_t i;
131    s->resamplers = AUBIO_ARRAY(aubio_resampler_t*, s->input_channels);
132    s->input_data = new_fvec(s->input_hop_size);
133    s->input_mat = new_fmat(s->input_channels, s->input_hop_size);
134    for (i = 0; i < (uint_t)s->input_channels; i++) {
135      s->resamplers[i] = new_aubio_resampler(s->ratio, 4);
136    }
137    if (s->ratio > 1) {
138      // we would need to add a ring buffer for these
139      if ( (uint_t)FLOOR(s->input_hop_size * s->ratio + .5)  != s->hop_size ) {
140        AUBIO_ERR("source_sndfile: can not upsample %s from %d to %d\n", s->path,
141            s->input_samplerate, s->samplerate);
142        goto beach;
143      }
144      AUBIO_WRN("source_sndfile: upsampling %s from %d to %d\n", s->path,
145          s->input_samplerate, s->samplerate);
146    }
147    s->duration = (uint_t)FLOOR(s->duration * s->ratio);
148  }
149#else
150  if (s->ratio != 1) {
151    AUBIO_ERR("source_sndfile: aubio was compiled without aubio_resampler\n");
152    goto beach;
153  }
154#endif /* HAVE_SAMPLERATE */
155
156  /* allocate data for de/interleaving reallocated when needed. */
157  s->scratch_size = s->input_hop_size * s->input_channels;
158  s->scratch_data = AUBIO_ARRAY(smpl_t, s->scratch_size);
159
160  return s;
161
162beach:
163  //AUBIO_ERR("can not read %s at samplerate %dHz with a hop_size of %d\n",
164  //    s->path, s->samplerate, s->hop_size);
165  del_aubio_source_sndfile(s);
166  return NULL;
167}
168
169void aubio_source_sndfile_do(aubio_source_sndfile_t * s, fvec_t * read_data, uint_t * read){
170  uint_t i,j, input_channels = s->input_channels;
171  /* read from file into scratch_data */
172  sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
173
174  /* where to store de-interleaved data */
175  smpl_t *ptr_data;
176#ifdef HAVE_SAMPLERATE
177  if (s->ratio != 1) {
178    ptr_data = s->input_data->data;
179  } else
180#endif /* HAVE_SAMPLERATE */
181  {
182    ptr_data = read_data->data;
183  }
184
185  /* de-interleaving and down-mixing data  */
186  for (j = 0; j < read_samples / input_channels; j++) {
187    ptr_data[j] = 0;
188    for (i = 0; i < input_channels; i++) {
189      ptr_data[j] += s->scratch_data[input_channels*j+i];
190    }
191    ptr_data[j] /= (smpl_t)input_channels;
192  }
193
194#ifdef HAVE_SAMPLERATE
195  if (s->resamplers) {
196    aubio_resampler_do(s->resamplers[0], s->input_data, read_data);
197  }
198#endif /* HAVE_SAMPLERATE */
199
200  *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
201
202  if (*read < s->hop_size) {
203    for (j = *read; j < s->hop_size; j++) {
204      read_data->data[j] = 0;
205    }
206  }
207
208}
209
210void aubio_source_sndfile_do_multi(aubio_source_sndfile_t * s, fmat_t * read_data, uint_t * read){
211  uint_t i,j, input_channels = s->input_channels;
212  /* do actual reading */
213  sf_count_t read_samples = aubio_sf_read_smpl (s->handle, s->scratch_data, s->scratch_size);
214
215  /* where to store de-interleaved data */
216  smpl_t **ptr_data;
217#ifdef HAVE_SAMPLERATE
218  if (s->ratio != 1) {
219    ptr_data = s->input_mat->data;
220  } else
221#endif /* HAVE_SAMPLERATE */
222  {
223    ptr_data = read_data->data;
224  }
225
226  if (read_data->height < input_channels) {
227    // destination matrix has less channels than the file; copy only first
228    // channels of the file, de-interleaving data
229    for (j = 0; j < read_samples / input_channels; j++) {
230      for (i = 0; i < read_data->height; i++) {
231        ptr_data[i][j] = s->scratch_data[j * input_channels + i];
232      }
233    }
234  } else {
235    // destination matrix has as many or more channels than the file; copy each
236    // channel from the file to the destination matrix, de-interleaving data
237    for (j = 0; j < read_samples / input_channels; j++) {
238      for (i = 0; i < input_channels; i++) {
239        ptr_data[i][j] = s->scratch_data[j * input_channels + i];
240      }
241    }
242  }
243
244  if (read_data->height > input_channels) {
245    // destination matrix has more channels than the file; copy last channel
246    // of the file to each additional channels, de-interleaving data
247    for (j = 0; j < read_samples / input_channels; j++) {
248      for (i = input_channels; i < read_data->height; i++) {
249        ptr_data[i][j] = s->scratch_data[j * input_channels + (input_channels - 1)];
250      }
251    }
252  }
253
254#ifdef HAVE_SAMPLERATE
255  if (s->resamplers) {
256    for (i = 0; i < input_channels; i++) {
257      fvec_t input_chan, read_chan;
258      input_chan.data = s->input_mat->data[i];
259      input_chan.length = s->input_mat->length;
260      read_chan.data = read_data->data[i];
261      read_chan.length = read_data->length;
262      aubio_resampler_do(s->resamplers[i], &input_chan, &read_chan);
263    }
264  }
265#endif /* HAVE_SAMPLERATE */
266
267  *read = (int)FLOOR(s->ratio * read_samples / input_channels + .5);
268
269  if (*read < s->hop_size) {
270    for (i = 0; i < read_data->height; i++) {
271      for (j = *read; j < s->hop_size; j++) {
272        read_data->data[i][j] = 0.;
273      }
274    }
275  }
276
277}
278
279uint_t aubio_source_sndfile_get_samplerate(aubio_source_sndfile_t * s) {
280  return s->samplerate;
281}
282
283uint_t aubio_source_sndfile_get_channels(aubio_source_sndfile_t * s) {
284  return s->input_channels;
285}
286
287uint_t aubio_source_sndfile_get_duration (const aubio_source_sndfile_t * s) {
288  if (s && s->duration) {
289    return s->duration;
290  }
291  return 0;
292}
293
294uint_t aubio_source_sndfile_seek (aubio_source_sndfile_t * s, uint_t pos) {
295  uint_t resampled_pos = (uint_t)ROUND(pos / s->ratio);
296  sf_count_t sf_ret;
297  if (s->handle == NULL) {
298    AUBIO_ERR("source_sndfile: failed seeking in %s (file not opened?)\n",
299        s->path);
300    return AUBIO_FAIL;
301  }
302  if ((sint_t)pos < 0) {
303    AUBIO_ERR("source_sndfile: could not seek %s at %d (seeking position"
304       " should be >= 0)\n", s->path, pos);
305    return AUBIO_FAIL;
306  }
307  sf_ret = sf_seek (s->handle, resampled_pos, SEEK_SET);
308  if (sf_ret == -1) {
309    AUBIO_ERR("source_sndfile: Failed seeking %s at %d: %s\n", s->path, pos, sf_strerror (NULL));
310    return AUBIO_FAIL;
311  }
312  if (sf_ret != resampled_pos) {
313    AUBIO_ERR("source_sndfile: Tried seeking %s at %d, but got %d: %s\n",
314        s->path, resampled_pos, (uint_t)sf_ret, sf_strerror (NULL));
315    return AUBIO_FAIL;
316  }
317  return AUBIO_OK;
318}
319
320uint_t aubio_source_sndfile_close (aubio_source_sndfile_t *s) {
321  if (!s->handle) {
322    return AUBIO_OK;
323  }
324  if(sf_close(s->handle)) {
325    AUBIO_ERR("source_sndfile: Error closing file %s: %s\n", s->path, sf_strerror (NULL));
326    return AUBIO_FAIL;
327  }
328  s->handle = NULL;
329  return AUBIO_OK;
330}
331
332void del_aubio_source_sndfile(aubio_source_sndfile_t * s){
333  AUBIO_ASSERT(s);
334  aubio_source_sndfile_close(s);
335#ifdef HAVE_SAMPLERATE
336  if (s->resamplers != NULL) {
337    uint_t i = 0, input_channels = s->input_channels;
338    for (i = 0; i < input_channels; i ++) {
339      if (s->resamplers[i] != NULL) {
340        del_aubio_resampler(s->resamplers[i]);
341      }
342    }
343    AUBIO_FREE(s->resamplers);
344  }
345  if (s->input_data) {
346    del_fvec(s->input_data);
347  }
348  if (s->input_mat) {
349    del_fmat(s->input_mat);
350  }
351#endif /* HAVE_SAMPLERATE */
352  if (s->path) AUBIO_FREE(s->path);
353  AUBIO_FREE(s->scratch_data);
354  AUBIO_FREE(s);
355}
356
357#endif /* HAVE_SNDFILE */
Note: See TracBrowser for help on using the repository browser.