source: src/io/source_wavread.c @ c0a1906

feature/autosinkfeature/constantqfeature/pitchshiftfeature/timestretch
Last change on this file since c0a1906 was c0a1906, checked in by Paul Brossier <piem@piem.org>, 12 months ago

[source] simplify and avoid unrequired checks

  • Property mode set to 100644
File size: 13.6 KB
Line 
1/*
2  Copyright (C) 2014 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_WAVREAD
24
25#include "fvec.h"
26#include "fmat.h"
27#include "source_wavread.h"
28
29#include <errno.h>
30
31#define AUBIO_WAVREAD_BUFSIZE 1024
32
33#define SHORT_TO_FLOAT(x) (smpl_t)(x * 3.0517578125e-05)
34
35struct _aubio_source_wavread_t {
36  uint_t hop_size;
37  uint_t samplerate;
38  uint_t channels;
39
40  // some data about the file
41  char_t *path;
42  uint_t input_samplerate;
43  uint_t input_channels;
44
45  // internal stuff
46  FILE *fid;
47
48  uint_t read_samples;
49  uint_t blockalign;
50  uint_t bitspersample;
51  uint_t read_index;
52  uint_t eof;
53
54  uint_t duration;
55
56  size_t seek_start;
57
58  unsigned char *short_output;
59  fmat_t *output;
60};
61
62static unsigned int read_little_endian (unsigned char *buf,
63    unsigned int length);
64
65static unsigned int read_little_endian (unsigned char *buf,
66    unsigned int length)
67{
68  uint_t i, ret = 0;
69  for (i = 0; i < length; i++) {
70    ret += buf[i] << (i * 8);
71  }
72  return ret;
73}
74
75aubio_source_wavread_t * new_aubio_source_wavread(const char_t * path, uint_t samplerate, uint_t hop_size) {
76  aubio_source_wavread_t * s = AUBIO_NEW(aubio_source_wavread_t);
77  size_t bytes_read = 0, bytes_junk = 0, bytes_expected = 44;
78  unsigned char buf[5] = "\0";
79  unsigned int format, channels, sr, byterate, blockalign, duration, bitspersample;//, data_size;
80
81  if (path == NULL) {
82    AUBIO_ERR("source_wavread: Aborted opening null path\n");
83    goto beach;
84  }
85  if ((sint_t)samplerate < 0) {
86    AUBIO_ERR("source_wavread: Can not open %s with samplerate %d\n", path, samplerate);
87    goto beach;
88  }
89  if ((sint_t)hop_size <= 0) {
90    AUBIO_ERR("source_wavread: Can not open %s with hop_size %d\n", path, hop_size);
91    goto beach;
92  }
93
94  s->path = AUBIO_ARRAY(char_t, strnlen(path, PATH_MAX) + 1);
95  strncpy(s->path, path, strnlen(path, PATH_MAX) + 1);
96
97  s->samplerate = samplerate;
98  s->hop_size = hop_size;
99
100  s->fid = fopen((const char *)path, "rb");
101  if (!s->fid) {
102    AUBIO_ERR("source_wavread: Failed opening %s (System error: %s)\n", s->path, strerror(errno));
103    goto beach;
104  }
105
106  // ChunkID
107  bytes_read += fread(buf, 1, 4, s->fid);
108  buf[4] = '\0';
109  if ( strcmp((const char *)buf, "RIFF") != 0 ) {
110    AUBIO_ERR("source_wavread: Failed opening %s (could not find RIFF header)\n", s->path);
111    goto beach;
112  }
113
114  // ChunkSize
115  bytes_read += fread(buf, 1, 4, s->fid);
116
117  // Format
118  bytes_read += fread(buf, 1, 4, s->fid);
119  buf[4] = '\0';
120  if ( strcmp((const char *)buf, "WAVE") != 0 ) {
121    AUBIO_ERR("source_wavread: Failed opening %s (wrong format in RIFF header)\n", s->path);
122    goto beach;
123  }
124
125  // Subchunk1ID
126  bytes_read += fread(buf, 1, 4, s->fid);
127  buf[4] = '\0';
128
129  // check if we have a JUNK Chunk
130  if ( strcmp((const char *)buf, "JUNK") == 0 ) {
131    bytes_junk = fread(buf, 1, 4, s->fid);
132    buf[4] = '\0';
133    bytes_junk += read_little_endian(buf, 4);
134    if (fseek(s->fid, bytes_read + bytes_junk, SEEK_SET) != 0) {
135      AUBIO_ERR("source_wavread: Failed opening %s (could not seek past JUNK Chunk: %s)\n",
136          s->path, strerror(errno));
137      goto beach;
138    }
139    bytes_read += bytes_junk;
140    bytes_expected += bytes_junk + 4;
141    // now really read the fmt chunk
142    bytes_read += fread(buf, 1, 4, s->fid);
143    buf[4] = '\0';
144  }
145
146  // get the fmt chunk
147  if ( strcmp((const char *)buf, "fmt ") != 0 ) {
148    AUBIO_ERR("source_wavread: Failed opening %s (could not find 'fmt ' in RIFF header)\n", s->path);
149    goto beach;
150  }
151
152  // Subchunk1Size
153  bytes_read += fread(buf, 1, 4, s->fid);
154  format = read_little_endian(buf, 4);
155  if ( format != 16 ) {
156    // TODO accept format 18
157    AUBIO_ERR("source_wavread: Failed opening %s (not encoded with PCM)\n", s->path);
158    goto beach;
159  }
160  if ( buf[1] || buf[2] | buf[3] ) {
161    AUBIO_ERR("source_wavread: Failed opening %s (Subchunk1Size should be 0)\n", s->path);
162    goto beach;
163  }
164
165  // AudioFormat
166  bytes_read += fread(buf, 1, 2, s->fid);
167  if ( buf[0] != 1 || buf[1] != 0) {
168    AUBIO_ERR("source_wavread: Failed opening %s (AudioFormat should be PCM)\n", s->path);
169    goto beach;
170  }
171
172  // NumChannels
173  bytes_read += fread(buf, 1, 2, s->fid);
174  channels = read_little_endian(buf, 2);
175
176  // SampleRate
177  bytes_read += fread(buf, 1, 4, s->fid);
178  sr = read_little_endian(buf, 4);
179
180  // ByteRate
181  bytes_read += fread(buf, 1, 4, s->fid);
182  byterate = read_little_endian(buf, 4);
183
184  // BlockAlign
185  bytes_read += fread(buf, 1, 2, s->fid);
186  blockalign = read_little_endian(buf, 2);
187
188  // BitsPerSample
189  bytes_read += fread(buf, 1, 2, s->fid);
190  bitspersample = read_little_endian(buf, 2);
191
192  if ( channels == 0 ) {
193    AUBIO_ERR("source_wavread: Failed opening %s (number of channels can not be 0)\n", s->path);
194    goto beach;
195  }
196
197  if ( (sint_t)sr <= 0 ) {
198    AUBIO_ERR("source_wavread: Failed opening %s (samplerate can not be <= 0)\n", s->path);
199    goto beach;
200  }
201
202  if ( byterate == 0 ) {
203    AUBIO_ERR("source_wavread: Failed opening %s (byterate can not be 0)\n", s->path);
204    goto beach;
205  }
206
207  if ( bitspersample == 0 ) {
208    AUBIO_ERR("source_wavread: Failed opening %s (bitspersample can not be 0)\n", s->path);
209    goto beach;
210  }
211#if 0
212  if ( bitspersample != 16 ) {
213    AUBIO_ERR("source_wavread: can not process %dbit file %s\n",
214        bitspersample, s->path);
215    goto beach;
216  }
217#endif
218
219  if ( byterate * 8 != sr * channels * bitspersample ) {
220    AUBIO_ERR("source_wavread: Failed opening %s (wrong byterate)\n", s->path);
221    goto beach;
222  }
223
224  if ( blockalign * 8 != channels * bitspersample ) {
225    AUBIO_ERR("source_wavread: Failed opening %s (wrong blockalign)\n", s->path);
226    goto beach;
227  }
228
229  s->input_samplerate = sr;
230  s->input_channels = channels;
231
232#if 0
233  AUBIO_DBG("channels %d\n", channels);
234  AUBIO_DBG("sr %d\n", sr);
235  AUBIO_DBG("byterate %d\n", byterate);
236  AUBIO_DBG("blockalign %d\n", blockalign);
237  AUBIO_DBG("bitspersample %d\n", bitspersample);
238
239  AUBIO_DBG("found %d channels in %s\n", s->input_channels, s->path);
240  AUBIO_DBG("found %d samplerate in %s\n", s->input_samplerate, s->path);
241#endif
242
243  if (samplerate == 0) {
244    s->samplerate = s->input_samplerate;
245  } else if (samplerate != s->input_samplerate) {
246    AUBIO_ERR("source_wavread: can not resample %s from %d to %dHz\n",
247        s->path, s->input_samplerate, samplerate);
248    goto beach;
249  }
250
251  // Subchunk2ID
252  bytes_read += fread(buf, 1, 4, s->fid);
253  buf[4] = '\0';
254  while ( strcmp((const char *)buf, "data") != 0 ) {
255    if (feof(s->fid) || ferror(s->fid)) {
256      AUBIO_ERR("source_wavread: no data RIFF header found in %s\n", s->path);
257      goto beach;
258    }
259    bytes_junk = fread(buf, 1, 4, s->fid);
260    buf[4] = '\0';
261    bytes_junk += read_little_endian(buf, 4);
262    if (fseek(s->fid, bytes_read + bytes_junk, SEEK_SET) != 0) {
263      AUBIO_ERR("source_wavread: could not seek past unknown chunk in %s (%s)\n",
264          s->path, strerror(errno));
265      goto beach;
266    }
267    bytes_read += bytes_junk;
268    bytes_expected += bytes_junk+ 4;
269    bytes_read += fread(buf, 1, 4, s->fid);
270    buf[4] = '\0';
271  }
272
273  // Subchunk2Size
274  bytes_read += fread(buf, 1, 4, s->fid);
275  duration = read_little_endian(buf, 4) / blockalign;
276
277  //data_size = buf[0] + (buf[1] << 8) + (buf[2] << 16) + (buf[3] << 24);
278  //AUBIO_MSG("found %d frames in %s\n", 8 * data_size / bitspersample / channels, s->path);
279
280  // check the total number of bytes read is correct
281  if ( bytes_read != bytes_expected ) {
282#ifndef HAVE_WIN_HACKS
283    AUBIO_ERR("source_wavread: short read (%zd instead of %zd) in %s\n",
284        bytes_read, bytes_expected, s->path);
285#else // mingw does not know about %zd...
286    AUBIO_ERR("source_wavread: short read (%d instead of %d) in %s\n",
287        (int)bytes_read, (int)bytes_expected, s->path);
288#endif
289    goto beach;
290  }
291  s->seek_start = bytes_read;
292
293  s->output = new_fmat(s->input_channels, AUBIO_WAVREAD_BUFSIZE);
294  s->blockalign= blockalign;
295  s->bitspersample = bitspersample;
296
297  s->duration = duration;
298
299  s->short_output = (unsigned char *)calloc(s->blockalign, AUBIO_WAVREAD_BUFSIZE);
300  s->read_index = 0;
301  s->read_samples = 0;
302  s->eof = 0;
303
304  return s;
305
306beach:
307  //AUBIO_ERR("source_wavread: can not read %s at samplerate %dHz with a hop_size of %d\n",
308  //    s->path, s->samplerate, s->hop_size);
309  del_aubio_source_wavread(s);
310  return NULL;
311}
312
313void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read);
314
315void aubio_source_wavread_readframe(aubio_source_wavread_t *s, uint_t *wavread_read) {
316  unsigned char *short_ptr = s->short_output;
317  size_t read = fread(short_ptr, s->blockalign, AUBIO_WAVREAD_BUFSIZE, s->fid);
318  uint_t i, j, b, bitspersample = s->bitspersample;
319  uint_t wrap_at = (1 << ( bitspersample - 1 ) );
320  uint_t wrap_with = (1 << bitspersample);
321  smpl_t scaler = 1. / wrap_at;
322  int signed_val = 0;
323  unsigned int unsigned_val = 0;
324
325  for (j = 0; j < read; j++) {
326    for (i = 0; i < s->input_channels; i++) {
327      unsigned_val = 0;
328      for (b = 0; b < bitspersample; b+=8 ) {
329        unsigned_val += *(short_ptr) << b;
330        short_ptr++;
331      }
332      signed_val = unsigned_val;
333      // FIXME why does 8 bit conversion maps [0;255] to [-128;127]
334      // instead of [0;127] to [0;127] and [128;255] to [-128;-1]
335      if (bitspersample == 8) signed_val -= wrap_at;
336      else if (unsigned_val >= wrap_at) signed_val = unsigned_val - wrap_with;
337      s->output->data[i][j] = signed_val * scaler;
338    }
339  }
340
341  *wavread_read = read;
342
343  if (read == 0) s->eof = 1;
344}
345
346void aubio_source_wavread_do(aubio_source_wavread_t * s, fvec_t * read_data, uint_t * read){
347  uint_t i, j;
348  uint_t end = 0;
349  uint_t total_wrote = 0;
350  if (s->fid == NULL) {
351    AUBIO_ERR("source_wavread: could not read from %s (file not opened)\n",
352        s->path);
353    return;
354  }
355  while (total_wrote < s->hop_size) {
356    end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
357    for (i = 0; i < end; i++) {
358      read_data->data[i + total_wrote] = 0;
359      for (j = 0; j < s->input_channels; j++ ) {
360        read_data->data[i + total_wrote] += s->output->data[j][i + s->read_index];
361      }
362      read_data->data[i + total_wrote] /= (smpl_t)(s->input_channels);
363    }
364    total_wrote += end;
365    if (total_wrote < s->hop_size) {
366      uint_t wavread_read = 0;
367      aubio_source_wavread_readframe(s, &wavread_read);
368      s->read_samples = wavread_read;
369      s->read_index = 0;
370      if (s->eof) {
371        break;
372      }
373    } else {
374      s->read_index += end;
375    }
376  }
377  if (total_wrote < s->hop_size) {
378    for (i = end; i < s->hop_size; i++) {
379      read_data->data[i] = 0.;
380    }
381  }
382  *read = total_wrote;
383}
384
385void aubio_source_wavread_do_multi(aubio_source_wavread_t * s, fmat_t * read_data, uint_t * read){
386  uint_t i,j;
387  uint_t end = 0;
388  uint_t total_wrote = 0;
389  if (s->fid == NULL) {
390    AUBIO_ERR("source_wavread: could not read from %s (file not opened)\n",
391        s->path);
392    return;
393  }
394  while (total_wrote < s->hop_size) {
395    end = MIN(s->read_samples - s->read_index, s->hop_size - total_wrote);
396    for (j = 0; j < read_data->height; j++) {
397      for (i = 0; i < end; i++) {
398        read_data->data[j][i + total_wrote] = s->output->data[j][i];
399      }
400    }
401    total_wrote += end;
402    if (total_wrote < s->hop_size) {
403      uint_t wavread_read = 0;
404      aubio_source_wavread_readframe(s, &wavread_read);
405      s->read_samples = wavread_read;
406      s->read_index = 0;
407      if (s->eof) {
408        break;
409      }
410    } else {
411      s->read_index += end;
412    }
413  }
414  if (total_wrote < s->hop_size) {
415    for (j = 0; j < read_data->height; j++) {
416      for (i = end; i < s->hop_size; i++) {
417        read_data->data[j][i] = 0.;
418      }
419    }
420  }
421  *read = total_wrote;
422}
423
424uint_t aubio_source_wavread_get_samplerate(aubio_source_wavread_t * s) {
425  return s->samplerate;
426}
427
428uint_t aubio_source_wavread_get_channels(aubio_source_wavread_t * s) {
429  return s->input_channels;
430}
431
432uint_t aubio_source_wavread_seek (aubio_source_wavread_t * s, uint_t pos) {
433  uint_t ret = 0;
434  if (s->fid == NULL) {
435    AUBIO_ERR("source_wavread: could not seek %s (file not opened?)\n", s->path, pos);
436    return AUBIO_FAIL;
437  }
438  if ((sint_t)pos < 0) {
439    AUBIO_ERR("source_wavread: could not seek %s at %d (seeking position should be >= 0)\n", s->path, pos);
440    return AUBIO_FAIL;
441  }
442  ret = fseek(s->fid, s->seek_start + pos * s->blockalign, SEEK_SET);
443  if (ret != 0) {
444    AUBIO_ERR("source_wavread: could not seek %s at %d (%s)\n", s->path, pos, strerror(errno));
445    return AUBIO_FAIL;
446  }
447  // reset some values
448  s->eof = 0;
449  s->read_index = 0;
450  return AUBIO_OK;
451}
452
453uint_t aubio_source_wavread_get_duration (const aubio_source_wavread_t * s) {
454  if (s && s->duration) {
455    return s->duration;
456  }
457  return 0;
458}
459
460uint_t aubio_source_wavread_close (aubio_source_wavread_t * s) {
461  if (s->fid == NULL) {
462    return AUBIO_OK;
463  }
464  if (fclose(s->fid)) {
465    AUBIO_ERR("source_wavread: could not close %s (%s)\n", s->path, strerror(errno));
466    return AUBIO_FAIL;
467  }
468  s->fid = NULL;
469  return AUBIO_OK;
470}
471
472void del_aubio_source_wavread(aubio_source_wavread_t * s) {
473  AUBIO_ASSERT(s);
474  aubio_source_wavread_close(s);
475  if (s->short_output) AUBIO_FREE(s->short_output);
476  if (s->output) del_fmat(s->output);
477  if (s->path) AUBIO_FREE(s->path);
478  AUBIO_FREE(s);
479}
480
481#endif /* HAVE_WAVREAD */
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