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vorbisdec.c
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1 /**
2  * @file
3  * Vorbis I decoder
4  * @author Denes Balatoni ( dbalatoni programozo hu )
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Vorbis I decoder
26  * @author Denes Balatoni ( dbalatoni programozo hu )
27  */
28 
29 #include <inttypes.h>
30 #include <math.h>
31 
32 #include "libavutil/avassert.h"
33 #include "libavutil/float_dsp.h"
34 
35 #define BITSTREAM_READER_LE
36 #include "avcodec.h"
37 #include "fft.h"
38 #include "get_bits.h"
39 #include "internal.h"
40 #include "vorbis.h"
41 #include "vorbisdsp.h"
42 #include "xiph.h"
43 
44 #define V_NB_BITS 8
45 #define V_NB_BITS2 11
46 #define V_MAX_VLCS (1 << 16)
47 #define V_MAX_PARTITIONS (1 << 20)
48 
49 typedef struct vorbis_codebook {
54  float *codevectors;
55  unsigned int nb_bits;
57 
58 typedef union vorbis_floor_u vorbis_floor_data;
59 typedef struct vorbis_floor0_s vorbis_floor0;
60 typedef struct vorbis_floor1_s vorbis_floor1;
61 struct vorbis_context_s;
62 typedef
64  (struct vorbis_context_s *, vorbis_floor_data *, float *);
65 typedef struct vorbis_floor {
69  struct vorbis_floor0_s {
71  uint16_t rate;
72  uint16_t bark_map_size;
73  int32_t *map[2];
74  uint32_t map_size[2];
79  float *lsp;
80  } t0;
81  struct vorbis_floor1_s {
87  int16_t subclass_books[16][8];
89  uint16_t x_list_dim;
91  } t1;
92  } data;
93 } vorbis_floor;
94 
95 typedef struct vorbis_residue {
96  uint16_t type;
97  uint32_t begin;
98  uint32_t end;
99  unsigned partition_size;
102  int16_t books[64][8];
104  uint16_t ptns_to_read;
107 
108 typedef struct vorbis_mapping {
110  uint16_t coupling_steps;
117 
118 typedef struct vorbis_mode {
120  uint16_t windowtype;
121  uint16_t transformtype;
123 } vorbis_mode;
124 
125 typedef struct vorbis_context_s {
130 
131  FFTContext mdct[2];
133  uint32_t version;
136  uint32_t bitrate_maximum;
137  uint32_t bitrate_nominal;
138  uint32_t bitrate_minimum;
139  uint32_t blocksize[2];
140  const float *win[2];
141  uint16_t codebook_count;
151  uint8_t mode_number; // mode number for the current packet
154  float *saved;
156 
157 /* Helper functions */
158 
159 #define BARK(x) \
160  (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
161 
162 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
163 #define VALIDATE_INDEX(idx, limit) \
164  if (idx >= limit) {\
165  av_log(vc->avctx, AV_LOG_ERROR,\
166  idx_err_str,\
167  (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
168  return AVERROR_INVALIDDATA;\
169  }
170 #define GET_VALIDATED_INDEX(idx, bits, limit) \
171  {\
172  idx = get_bits(gb, bits);\
173  VALIDATE_INDEX(idx, limit)\
174  }
175 
176 static float vorbisfloat2float(unsigned val)
177 {
178  double mant = val & 0x1fffff;
179  long exp = (val & 0x7fe00000L) >> 21;
180  if (val & 0x80000000)
181  mant = -mant;
182  return ldexp(mant, exp - 20 - 768);
183 }
184 
185 
186 // Free all allocated memory -----------------------------------------
187 
188 static void vorbis_free(vorbis_context *vc)
189 {
190  int i;
191 
193  av_freep(&vc->saved);
194  av_freep(&vc->fdsp);
195 
196  if (vc->residues)
197  for (i = 0; i < vc->residue_count; i++)
198  av_freep(&vc->residues[i].classifs);
199  av_freep(&vc->residues);
200  av_freep(&vc->modes);
201 
202  ff_mdct_end(&vc->mdct[0]);
203  ff_mdct_end(&vc->mdct[1]);
204 
205  if (vc->codebooks)
206  for (i = 0; i < vc->codebook_count; ++i) {
207  av_freep(&vc->codebooks[i].codevectors);
208  ff_free_vlc(&vc->codebooks[i].vlc);
209  }
210  av_freep(&vc->codebooks);
211 
212  if (vc->floors)
213  for (i = 0; i < vc->floor_count; ++i) {
214  if (vc->floors[i].floor_type == 0) {
215  av_freep(&vc->floors[i].data.t0.map[0]);
216  av_freep(&vc->floors[i].data.t0.map[1]);
217  av_freep(&vc->floors[i].data.t0.book_list);
218  av_freep(&vc->floors[i].data.t0.lsp);
219  } else {
220  av_freep(&vc->floors[i].data.t1.list);
221  }
222  }
223  av_freep(&vc->floors);
224 
225  if (vc->mappings)
226  for (i = 0; i < vc->mapping_count; ++i) {
227  av_freep(&vc->mappings[i].magnitude);
228  av_freep(&vc->mappings[i].angle);
229  av_freep(&vc->mappings[i].mux);
230  }
231  av_freep(&vc->mappings);
232 }
233 
234 // Parse setup header -------------------------------------------------
235 
236 // Process codebooks part
237 
239 {
240  unsigned cb;
241  uint8_t *tmp_vlc_bits = NULL;
242  uint32_t *tmp_vlc_codes = NULL;
243  GetBitContext *gb = &vc->gb;
244  uint16_t *codebook_multiplicands = NULL;
245  int ret = 0;
246 
247  vc->codebook_count = get_bits(gb, 8) + 1;
248 
249  ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
250 
251  vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
252  tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
253  tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
254  codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
255  if (!vc->codebooks ||
256  !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
257  ret = AVERROR(ENOMEM);
258  goto error;
259  }
260 
261  for (cb = 0; cb < vc->codebook_count; ++cb) {
262  vorbis_codebook *codebook_setup = &vc->codebooks[cb];
263  unsigned ordered, t, entries, used_entries = 0;
264 
265  ff_dlog(NULL, " %u. Codebook\n", cb);
266 
267  if (get_bits(gb, 24) != 0x564342) {
269  " %u. Codebook setup data corrupt.\n", cb);
270  ret = AVERROR_INVALIDDATA;
271  goto error;
272  }
273 
274  codebook_setup->dimensions=get_bits(gb, 16);
275  if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
277  " %u. Codebook's dimension is invalid (%d).\n",
278  cb, codebook_setup->dimensions);
279  ret = AVERROR_INVALIDDATA;
280  goto error;
281  }
282  entries = get_bits(gb, 24);
283  if (entries > V_MAX_VLCS) {
285  " %u. Codebook has too many entries (%u).\n",
286  cb, entries);
287  ret = AVERROR_INVALIDDATA;
288  goto error;
289  }
290 
291  ordered = get_bits1(gb);
292 
293  ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
294  codebook_setup->dimensions, entries);
295 
296  if (!ordered) {
297  unsigned ce, flag;
298  unsigned sparse = get_bits1(gb);
299 
300  ff_dlog(NULL, " not ordered \n");
301 
302  if (sparse) {
303  ff_dlog(NULL, " sparse \n");
304 
305  used_entries = 0;
306  for (ce = 0; ce < entries; ++ce) {
307  flag = get_bits1(gb);
308  if (flag) {
309  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
310  ++used_entries;
311  } else
312  tmp_vlc_bits[ce] = 0;
313  }
314  } else {
315  ff_dlog(NULL, " not sparse \n");
316 
317  used_entries = entries;
318  for (ce = 0; ce < entries; ++ce)
319  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
320  }
321  } else {
322  unsigned current_entry = 0;
323  unsigned current_length = get_bits(gb, 5) + 1;
324 
325  ff_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
326 
327  used_entries = entries;
328  for (; current_entry < used_entries && current_length <= 32; ++current_length) {
329  unsigned i, number;
330 
331  ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
332 
333  number = get_bits(gb, ilog(entries - current_entry));
334 
335  ff_dlog(NULL, " number: %u\n", number);
336 
337  for (i = current_entry; i < number+current_entry; ++i)
338  if (i < used_entries)
339  tmp_vlc_bits[i] = current_length;
340 
341  current_entry+=number;
342  }
343  if (current_entry>used_entries) {
344  av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
345  ret = AVERROR_INVALIDDATA;
346  goto error;
347  }
348  }
349 
350  codebook_setup->lookup_type = get_bits(gb, 4);
351 
352  ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
353  codebook_setup->lookup_type ? "vq" : "no lookup");
354 
355 // If the codebook is used for (inverse) VQ, calculate codevectors.
356 
357  if (codebook_setup->lookup_type == 1) {
358  unsigned i, j, k;
359  unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
360 
361  float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
362  float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
363  unsigned codebook_value_bits = get_bits(gb, 4) + 1;
364  unsigned codebook_sequence_p = get_bits1(gb);
365 
366  ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
367  codebook_lookup_values);
368  ff_dlog(NULL, " delta %f minmum %f \n",
369  codebook_delta_value, codebook_minimum_value);
370 
371  for (i = 0; i < codebook_lookup_values; ++i) {
372  codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
373 
374  ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
375  (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
376  ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
377  }
378 
379 // Weed out unused vlcs and build codevector vector
380  if (used_entries) {
381  codebook_setup->codevectors =
382  av_mallocz_array(used_entries, codebook_setup->dimensions *
383  sizeof(*codebook_setup->codevectors));
384  if (!codebook_setup->codevectors) {
385  ret = AVERROR(ENOMEM);
386  goto error;
387  }
388  } else
389  codebook_setup->codevectors = NULL;
390 
391  for (j = 0, i = 0; i < entries; ++i) {
392  unsigned dim = codebook_setup->dimensions;
393 
394  if (tmp_vlc_bits[i]) {
395  float last = 0.0;
396  unsigned lookup_offset = i;
397 
398  ff_dlog(vc->avctx, "Lookup offset %u ,", i);
399 
400  for (k = 0; k < dim; ++k) {
401  unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
402  codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
403  if (codebook_sequence_p)
404  last = codebook_setup->codevectors[j * dim + k];
405  lookup_offset/=codebook_lookup_values;
406  }
407  tmp_vlc_bits[j] = tmp_vlc_bits[i];
408 
409  ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
410  for (k = 0; k < dim; ++k)
411  ff_dlog(vc->avctx, " %f ",
412  codebook_setup->codevectors[j * dim + k]);
413  ff_dlog(vc->avctx, "\n");
414 
415  ++j;
416  }
417  }
418  if (j != used_entries) {
419  av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
420  ret = AVERROR_INVALIDDATA;
421  goto error;
422  }
423  entries = used_entries;
424  } else if (codebook_setup->lookup_type >= 2) {
425  av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
426  ret = AVERROR_INVALIDDATA;
427  goto error;
428  }
429 
430 // Initialize VLC table
431  if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
432  av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
433  ret = AVERROR_INVALIDDATA;
434  goto error;
435  }
436  codebook_setup->maxdepth = 0;
437  for (t = 0; t < entries; ++t)
438  if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
439  codebook_setup->maxdepth = tmp_vlc_bits[t];
440 
441  if (codebook_setup->maxdepth > 3 * V_NB_BITS)
442  codebook_setup->nb_bits = V_NB_BITS2;
443  else
444  codebook_setup->nb_bits = V_NB_BITS;
445 
446  codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
447 
448  if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
449  entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
450  sizeof(*tmp_vlc_bits), tmp_vlc_codes,
451  sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
452  INIT_VLC_LE))) {
453  av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
454  goto error;
455  }
456  }
457 
458  av_free(tmp_vlc_bits);
459  av_free(tmp_vlc_codes);
460  av_free(codebook_multiplicands);
461  return 0;
462 
463 // Error:
464 error:
465  av_free(tmp_vlc_bits);
466  av_free(tmp_vlc_codes);
467  av_free(codebook_multiplicands);
468  return ret;
469 }
470 
471 // Process time domain transforms part (unused in Vorbis I)
472 
474 {
475  GetBitContext *gb = &vc->gb;
476  unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
477 
478  for (i = 0; i < vorbis_time_count; ++i) {
479  unsigned vorbis_tdtransform = get_bits(gb, 16);
480 
481  ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
482  vorbis_time_count, vorbis_tdtransform);
483 
484  if (vorbis_tdtransform) {
485  av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
486  return AVERROR_INVALIDDATA;
487  }
488  }
489  return 0;
490 }
491 
492 // Process floors part
493 
494 static int vorbis_floor0_decode(vorbis_context *vc,
495  vorbis_floor_data *vfu, float *vec);
496 static int create_map(vorbis_context *vc, unsigned floor_number);
497 static int vorbis_floor1_decode(vorbis_context *vc,
498  vorbis_floor_data *vfu, float *vec);
500 {
501  GetBitContext *gb = &vc->gb;
502  int i, j, k, ret;
503 
504  vc->floor_count = get_bits(gb, 6) + 1;
505 
506  vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
507  if (!vc->floors)
508  return AVERROR(ENOMEM);
509 
510  for (i = 0; i < vc->floor_count; ++i) {
511  vorbis_floor *floor_setup = &vc->floors[i];
512 
513  floor_setup->floor_type = get_bits(gb, 16);
514 
515  ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
516 
517  if (floor_setup->floor_type == 1) {
518  int maximum_class = -1;
519  unsigned rangebits, rangemax, floor1_values = 2;
520 
521  floor_setup->decode = vorbis_floor1_decode;
522 
523  floor_setup->data.t1.partitions = get_bits(gb, 5);
524 
525  ff_dlog(NULL, " %d.floor: %d partitions \n",
526  i, floor_setup->data.t1.partitions);
527 
528  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
529  floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
530  if (floor_setup->data.t1.partition_class[j] > maximum_class)
531  maximum_class = floor_setup->data.t1.partition_class[j];
532 
533  ff_dlog(NULL, " %d. floor %d partition class %d \n",
534  i, j, floor_setup->data.t1.partition_class[j]);
535 
536  }
537 
538  ff_dlog(NULL, " maximum class %d \n", maximum_class);
539 
540  for (j = 0; j <= maximum_class; ++j) {
541  floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
542  floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
543 
544  ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
545  floor_setup->data.t1.class_dimensions[j],
546  floor_setup->data.t1.class_subclasses[j]);
547 
548  if (floor_setup->data.t1.class_subclasses[j]) {
550 
551  ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
552  }
553 
554  for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
555  int16_t bits = get_bits(gb, 8) - 1;
556  if (bits != -1)
557  VALIDATE_INDEX(bits, vc->codebook_count)
558  floor_setup->data.t1.subclass_books[j][k] = bits;
559 
560  ff_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
561  }
562  }
563 
564  floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
565  floor_setup->data.t1.x_list_dim = 2;
566 
567  for (j = 0; j < floor_setup->data.t1.partitions; ++j)
568  floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
569 
570  floor_setup->data.t1.list = av_mallocz_array(floor_setup->data.t1.x_list_dim,
571  sizeof(*floor_setup->data.t1.list));
572  if (!floor_setup->data.t1.list)
573  return AVERROR(ENOMEM);
574 
575  rangebits = get_bits(gb, 4);
576  if (!rangebits && floor_setup->data.t1.partitions) {
578  "A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
579  return AVERROR_INVALIDDATA;
580  }
581  rangemax = (1 << rangebits);
582  if (rangemax > vc->blocksize[1] / 2) {
584  "Floor value is too large for blocksize: %u (%"PRIu32")\n",
585  rangemax, vc->blocksize[1] / 2);
586  return AVERROR_INVALIDDATA;
587  }
588  floor_setup->data.t1.list[0].x = 0;
589  floor_setup->data.t1.list[1].x = rangemax;
590 
591  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
592  for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
593  floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
594 
595  ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
596  floor_setup->data.t1.list[floor1_values].x);
597  }
598  }
599 
600 // Precalculate order of x coordinates - needed for decode
602  floor_setup->data.t1.list,
603  floor_setup->data.t1.x_list_dim)) {
604  return AVERROR_INVALIDDATA;
605  }
606  } else if (floor_setup->floor_type == 0) {
607  unsigned max_codebook_dim = 0;
608 
609  floor_setup->decode = vorbis_floor0_decode;
610 
611  floor_setup->data.t0.order = get_bits(gb, 8);
612  if (!floor_setup->data.t0.order) {
613  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
614  return AVERROR_INVALIDDATA;
615  }
616  floor_setup->data.t0.rate = get_bits(gb, 16);
617  if (!floor_setup->data.t0.rate) {
618  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
619  return AVERROR_INVALIDDATA;
620  }
621  floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
622  if (!floor_setup->data.t0.bark_map_size) {
624  "Floor 0 bark map size is 0.\n");
625  return AVERROR_INVALIDDATA;
626  }
627  floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
628  floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
629  floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
630 
631  /* allocate mem for booklist */
632  floor_setup->data.t0.book_list =
633  av_malloc(floor_setup->data.t0.num_books);
634  if (!floor_setup->data.t0.book_list)
635  return AVERROR(ENOMEM);
636  /* read book indexes */
637  {
638  int idx;
639  unsigned book_idx;
640  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
641  GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
642  floor_setup->data.t0.book_list[idx] = book_idx;
643  if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
644  max_codebook_dim = vc->codebooks[book_idx].dimensions;
645  }
646  }
647 
648  if ((ret = create_map(vc, i)) < 0)
649  return ret;
650 
651  /* codebook dim is for padding if codebook dim doesn't *
652  * divide order+1 then we need to read more data */
653  floor_setup->data.t0.lsp =
654  av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
655  sizeof(*floor_setup->data.t0.lsp));
656  if (!floor_setup->data.t0.lsp)
657  return AVERROR(ENOMEM);
658 
659  /* debug output parsed headers */
660  ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
661  ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
662  ff_dlog(NULL, "floor0 bark map size: %u\n",
663  floor_setup->data.t0.bark_map_size);
664  ff_dlog(NULL, "floor0 amplitude bits: %u\n",
665  floor_setup->data.t0.amplitude_bits);
666  ff_dlog(NULL, "floor0 amplitude offset: %u\n",
667  floor_setup->data.t0.amplitude_offset);
668  ff_dlog(NULL, "floor0 number of books: %u\n",
669  floor_setup->data.t0.num_books);
670  ff_dlog(NULL, "floor0 book list pointer: %p\n",
671  floor_setup->data.t0.book_list);
672  {
673  int idx;
674  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
675  ff_dlog(NULL, " Book %d: %u\n", idx + 1,
676  floor_setup->data.t0.book_list[idx]);
677  }
678  }
679  } else {
680  av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
681  return AVERROR_INVALIDDATA;
682  }
683  }
684  return 0;
685 }
686 
687 // Process residues part
688 
690 {
691  GetBitContext *gb = &vc->gb;
692  unsigned i, j, k;
693 
694  vc->residue_count = get_bits(gb, 6)+1;
695  vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
696  if (!vc->residues)
697  return AVERROR(ENOMEM);
698 
699  ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
700 
701  for (i = 0; i < vc->residue_count; ++i) {
702  vorbis_residue *res_setup = &vc->residues[i];
703  uint8_t cascade[64];
704  unsigned high_bits, low_bits;
705 
706  res_setup->type = get_bits(gb, 16);
707 
708  ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
709 
710  res_setup->begin = get_bits(gb, 24);
711  res_setup->end = get_bits(gb, 24);
712  res_setup->partition_size = get_bits(gb, 24) + 1;
713  /* Validations to prevent a buffer overflow later. */
714  if (res_setup->begin>res_setup->end ||
715  (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
717  "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
718  res_setup->type, res_setup->begin, res_setup->end,
719  res_setup->partition_size, vc->blocksize[1] / 2);
720  return AVERROR_INVALIDDATA;
721  }
722 
723  res_setup->classifications = get_bits(gb, 6) + 1;
724  GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
725 
726  res_setup->ptns_to_read =
727  (res_setup->end - res_setup->begin) / res_setup->partition_size;
728  res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
729  vc->audio_channels *
730  sizeof(*res_setup->classifs));
731  if (!res_setup->classifs)
732  return AVERROR(ENOMEM);
733 
734  ff_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
735  res_setup->begin, res_setup->end, res_setup->partition_size,
736  res_setup->classifications, res_setup->classbook);
737 
738  for (j = 0; j < res_setup->classifications; ++j) {
739  high_bits = 0;
740  low_bits = get_bits(gb, 3);
741  if (get_bits1(gb))
742  high_bits = get_bits(gb, 5);
743  cascade[j] = (high_bits << 3) + low_bits;
744 
745  ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
746  }
747 
748  res_setup->maxpass = 0;
749  for (j = 0; j < res_setup->classifications; ++j) {
750  for (k = 0; k < 8; ++k) {
751  if (cascade[j]&(1 << k)) {
752  GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
753 
754  ff_dlog(NULL, " %u class cascade depth %u book: %d\n",
755  j, k, res_setup->books[j][k]);
756 
757  if (k>res_setup->maxpass)
758  res_setup->maxpass = k;
759  } else {
760  res_setup->books[j][k] = -1;
761  }
762  }
763  }
764  }
765  return 0;
766 }
767 
768 // Process mappings part
769 
771 {
772  GetBitContext *gb = &vc->gb;
773  unsigned i, j;
774 
775  vc->mapping_count = get_bits(gb, 6)+1;
776  vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
777  if (!vc->mappings)
778  return AVERROR(ENOMEM);
779 
780  ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
781 
782  for (i = 0; i < vc->mapping_count; ++i) {
783  vorbis_mapping *mapping_setup = &vc->mappings[i];
784 
785  if (get_bits(gb, 16)) {
786  av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
787  return AVERROR_INVALIDDATA;
788  }
789  if (get_bits1(gb)) {
790  mapping_setup->submaps = get_bits(gb, 4) + 1;
791  } else {
792  mapping_setup->submaps = 1;
793  }
794 
795  if (get_bits1(gb)) {
796  mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
797  if (vc->audio_channels < 2) {
799  "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n");
800  return AVERROR_INVALIDDATA;
801  }
802  mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
803  sizeof(*mapping_setup->magnitude));
804  mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
805  sizeof(*mapping_setup->angle));
806  if (!mapping_setup->angle || !mapping_setup->magnitude)
807  return AVERROR(ENOMEM);
808 
809  for (j = 0; j < mapping_setup->coupling_steps; ++j) {
810  GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
811  GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
812  }
813  } else {
814  mapping_setup->coupling_steps = 0;
815  }
816 
817  ff_dlog(NULL, " %u mapping coupling steps: %d\n",
818  i, mapping_setup->coupling_steps);
819 
820  if (get_bits(gb, 2)) {
821  av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
822  return AVERROR_INVALIDDATA; // following spec.
823  }
824 
825  if (mapping_setup->submaps>1) {
826  mapping_setup->mux = av_mallocz_array(vc->audio_channels,
827  sizeof(*mapping_setup->mux));
828  if (!mapping_setup->mux)
829  return AVERROR(ENOMEM);
830 
831  for (j = 0; j < vc->audio_channels; ++j)
832  mapping_setup->mux[j] = get_bits(gb, 4);
833  }
834 
835  for (j = 0; j < mapping_setup->submaps; ++j) {
836  skip_bits(gb, 8); // FIXME check?
837  GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
838  GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
839 
840  ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
841  mapping_setup->submap_floor[j],
842  mapping_setup->submap_residue[j]);
843  }
844  }
845  return 0;
846 }
847 
848 // Process modes part
849 
850 static int create_map(vorbis_context *vc, unsigned floor_number)
851 {
852  vorbis_floor *floors = vc->floors;
853  vorbis_floor0 *vf;
854  int idx;
855  int blockflag, n;
856  int32_t *map;
857 
858  for (blockflag = 0; blockflag < 2; ++blockflag) {
859  n = vc->blocksize[blockflag] / 2;
860  floors[floor_number].data.t0.map[blockflag] =
861  av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
862  if (!floors[floor_number].data.t0.map[blockflag])
863  return AVERROR(ENOMEM);
864 
865  map = floors[floor_number].data.t0.map[blockflag];
866  vf = &floors[floor_number].data.t0;
867 
868  for (idx = 0; idx < n; ++idx) {
869  map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
870  (vf->bark_map_size / BARK(vf->rate / 2.0f)));
871  if (vf->bark_map_size-1 < map[idx])
872  map[idx] = vf->bark_map_size - 1;
873  }
874  map[n] = -1;
875  vf->map_size[blockflag] = n;
876  }
877 
878  for (idx = 0; idx <= n; ++idx) {
879  ff_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
880  }
881 
882  return 0;
883 }
884 
886 {
887  GetBitContext *gb = &vc->gb;
888  unsigned i;
889 
890  vc->mode_count = get_bits(gb, 6) + 1;
891  vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
892  if (!vc->modes)
893  return AVERROR(ENOMEM);
894 
895  ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
896 
897  for (i = 0; i < vc->mode_count; ++i) {
898  vorbis_mode *mode_setup = &vc->modes[i];
899 
900  mode_setup->blockflag = get_bits1(gb);
901  mode_setup->windowtype = get_bits(gb, 16); //FIXME check
902  mode_setup->transformtype = get_bits(gb, 16); //FIXME check
903  GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
904 
905  ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
906  i, mode_setup->blockflag, mode_setup->windowtype,
907  mode_setup->transformtype, mode_setup->mapping);
908  }
909  return 0;
910 }
911 
912 // Process the whole setup header using the functions above
913 
915 {
916  GetBitContext *gb = &vc->gb;
917  int ret;
918 
919  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
920  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
921  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
922  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
923  return AVERROR_INVALIDDATA;
924  }
925 
926  if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
927  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
928  return ret;
929  }
930  if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
931  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
932  return ret;
933  }
934  if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
935  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
936  return ret;
937  }
938  if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
939  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
940  return ret;
941  }
942  if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
943  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
944  return ret;
945  }
946  if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
947  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
948  return ret;
949  }
950  if (!get_bits1(gb)) {
951  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
952  return AVERROR_INVALIDDATA; // framing flag bit unset error
953  }
954 
955  return 0;
956 }
957 
958 // Process the identification header
959 
961 {
962  GetBitContext *gb = &vc->gb;
963  unsigned bl0, bl1;
964 
965  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
966  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
967  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
968  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
969  return AVERROR_INVALIDDATA;
970  }
971 
972  vc->version = get_bits_long(gb, 32); //FIXME check 0
973  vc->audio_channels = get_bits(gb, 8);
974  if (vc->audio_channels <= 0) {
975  av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
976  return AVERROR_INVALIDDATA;
977  }
978  vc->audio_samplerate = get_bits_long(gb, 32);
979  if (vc->audio_samplerate <= 0) {
980  av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
981  return AVERROR_INVALIDDATA;
982  }
983  vc->bitrate_maximum = get_bits_long(gb, 32);
984  vc->bitrate_nominal = get_bits_long(gb, 32);
985  vc->bitrate_minimum = get_bits_long(gb, 32);
986  bl0 = get_bits(gb, 4);
987  bl1 = get_bits(gb, 4);
988  if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
989  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
990  return AVERROR_INVALIDDATA;
991  }
992  vc->blocksize[0] = (1 << bl0);
993  vc->blocksize[1] = (1 << bl1);
994  vc->win[0] = ff_vorbis_vwin[bl0 - 6];
995  vc->win[1] = ff_vorbis_vwin[bl1 - 6];
996 
997  if ((get_bits1(gb)) == 0) {
998  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
999  return AVERROR_INVALIDDATA;
1000  }
1001 
1002  vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1003  vc->saved = av_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1004  if (!vc->channel_residues || !vc->saved)
1005  return AVERROR(ENOMEM);
1006 
1007  vc->previous_window = -1;
1008 
1009  ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
1010  ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
1012  if (!vc->fdsp)
1013  return AVERROR(ENOMEM);
1014 
1015  ff_dlog(NULL, " vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
1017 
1018 /*
1019  BLK = vc->blocksize[0];
1020  for (i = 0; i < BLK / 2; ++i) {
1021  vc->win[0][i] = sin(0.5*3.14159265358*(sin(((float)i + 0.5) / (float)BLK*3.14159265358))*(sin(((float)i + 0.5) / (float)BLK*3.14159265358)));
1022  }
1023 */
1024 
1025  return 0;
1026 }
1027 
1028 // Process the extradata using the functions above (identification header, setup header)
1029 
1031 {
1032  vorbis_context *vc = avctx->priv_data;
1033  uint8_t *headers = avctx->extradata;
1034  int headers_len = avctx->extradata_size;
1035  const uint8_t *header_start[3];
1036  int header_len[3];
1037  GetBitContext *gb = &vc->gb;
1038  int hdr_type, ret;
1039 
1040  vc->avctx = avctx;
1041  ff_vorbisdsp_init(&vc->dsp);
1042 
1043  avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1044 
1045  if (!headers_len) {
1046  av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1047  return AVERROR_INVALIDDATA;
1048  }
1049 
1050  if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1051  av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1052  return ret;
1053  }
1054 
1055  init_get_bits(gb, header_start[0], header_len[0]*8);
1056  hdr_type = get_bits(gb, 8);
1057  if (hdr_type != 1) {
1058  av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1059  return AVERROR_INVALIDDATA;
1060  }
1061  if ((ret = vorbis_parse_id_hdr(vc))) {
1062  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1063  vorbis_free(vc);
1064  return ret;
1065  }
1066 
1067  init_get_bits(gb, header_start[2], header_len[2]*8);
1068  hdr_type = get_bits(gb, 8);
1069  if (hdr_type != 5) {
1070  av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1071  vorbis_free(vc);
1072  return AVERROR_INVALIDDATA;
1073  }
1074  if ((ret = vorbis_parse_setup_hdr(vc))) {
1075  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1076  vorbis_free(vc);
1077  return ret;
1078  }
1079 
1080  if (vc->audio_channels > 8)
1081  avctx->channel_layout = 0;
1082  else
1084 
1085  avctx->channels = vc->audio_channels;
1086  avctx->sample_rate = vc->audio_samplerate;
1087 
1088  return 0;
1089 }
1090 
1091 // Decode audiopackets -------------------------------------------------
1092 
1093 // Read and decode floor
1094 
1096  vorbis_floor_data *vfu, float *vec)
1097 {
1098  vorbis_floor0 *vf = &vfu->t0;
1099  float *lsp = vf->lsp;
1100  unsigned amplitude, book_idx;
1101  unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1102 
1103  if (!vf->amplitude_bits)
1104  return 1;
1105 
1106  amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1107  if (amplitude > 0) {
1108  float last = 0;
1109  unsigned idx, lsp_len = 0;
1110  vorbis_codebook codebook;
1111 
1112  book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1113  if (book_idx >= vf->num_books) {
1114  av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1115  book_idx = 0;
1116  }
1117  ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1118  codebook = vc->codebooks[vf->book_list[book_idx]];
1119  /* Invalid codebook! */
1120  if (!codebook.codevectors)
1121  return AVERROR_INVALIDDATA;
1122 
1123  while (lsp_len<vf->order) {
1124  int vec_off;
1125 
1126  ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1127  ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1128  /* read temp vector */
1129  vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1130  codebook.nb_bits, codebook.maxdepth)
1131  * codebook.dimensions;
1132  ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1133  /* copy each vector component and add last to it */
1134  for (idx = 0; idx < codebook.dimensions; ++idx)
1135  lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1136  last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1137 
1138  lsp_len += codebook.dimensions;
1139  }
1140  /* DEBUG: output lsp coeffs */
1141  {
1142  int idx;
1143  for (idx = 0; idx < lsp_len; ++idx)
1144  ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1145  }
1146 
1147  /* synthesize floor output vector */
1148  {
1149  int i;
1150  int order = vf->order;
1151  float wstep = M_PI / vf->bark_map_size;
1152 
1153  for (i = 0; i < order; i++)
1154  lsp[i] = 2.0f * cos(lsp[i]);
1155 
1156  ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1157  vf->map_size[blockflag], order, wstep);
1158 
1159  i = 0;
1160  while (i < vf->map_size[blockflag]) {
1161  int j, iter_cond = vf->map[blockflag][i];
1162  float p = 0.5f;
1163  float q = 0.5f;
1164  float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1165 
1166  /* similar part for the q and p products */
1167  for (j = 0; j + 1 < order; j += 2) {
1168  q *= lsp[j] - two_cos_w;
1169  p *= lsp[j + 1] - two_cos_w;
1170  }
1171  if (j == order) { // even order
1172  p *= p * (2.0f - two_cos_w);
1173  q *= q * (2.0f + two_cos_w);
1174  } else { // odd order
1175  q *= two_cos_w-lsp[j]; // one more time for q
1176 
1177  /* final step and square */
1178  p *= p * (4.f - two_cos_w * two_cos_w);
1179  q *= q;
1180  }
1181 
1182  /* calculate linear floor value */
1183  q = exp((((amplitude*vf->amplitude_offset) /
1184  (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1185  - vf->amplitude_offset) * .11512925f);
1186 
1187  /* fill vector */
1188  do {
1189  vec[i] = q; ++i;
1190  } while (vf->map[blockflag][i] == iter_cond);
1191  }
1192  }
1193  } else {
1194  /* this channel is unused */
1195  return 1;
1196  }
1197 
1198  ff_dlog(NULL, " Floor0 decoded\n");
1199 
1200  return 0;
1201 }
1202 
1204  vorbis_floor_data *vfu, float *vec)
1205 {
1206  vorbis_floor1 *vf = &vfu->t1;
1207  GetBitContext *gb = &vc->gb;
1208  uint16_t range_v[4] = { 256, 128, 86, 64 };
1209  unsigned range = range_v[vf->multiplier - 1];
1210  uint16_t floor1_Y[258];
1211  uint16_t floor1_Y_final[258];
1212  int floor1_flag[258];
1213  unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1214  int book, adx, ady, dy, off, predicted, err;
1215 
1216 
1217  if (!get_bits1(gb)) // silence
1218  return 1;
1219 
1220 // Read values (or differences) for the floor's points
1221 
1222  floor1_Y[0] = get_bits(gb, ilog(range - 1));
1223  floor1_Y[1] = get_bits(gb, ilog(range - 1));
1224 
1225  ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1226 
1227  offset = 2;
1228  for (i = 0; i < vf->partitions; ++i) {
1229  partition_class = vf->partition_class[i];
1230  cdim = vf->class_dimensions[partition_class];
1231  cbits = vf->class_subclasses[partition_class];
1232  csub = (1 << cbits) - 1;
1233  cval = 0;
1234 
1235  ff_dlog(NULL, "Cbits %u\n", cbits);
1236 
1237  if (cbits) // this reads all subclasses for this partition's class
1238  cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1239  vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1240 
1241  for (j = 0; j < cdim; ++j) {
1242  book = vf->subclass_books[partition_class][cval & csub];
1243 
1244  ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1245  book, cbits, cval, get_bits_count(gb));
1246 
1247  cval = cval >> cbits;
1248  if (book > -1) {
1249  int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1250  vc->codebooks[book].nb_bits, 3);
1251  if (v < 0)
1252  return AVERROR_INVALIDDATA;
1253  floor1_Y[offset+j] = v;
1254  } else {
1255  floor1_Y[offset+j] = 0;
1256  }
1257 
1258  ff_dlog(NULL, " floor(%d) = %d \n",
1259  vf->list[offset+j].x, floor1_Y[offset+j]);
1260  }
1261  offset+=cdim;
1262  }
1263 
1264 // Amplitude calculation from the differences
1265 
1266  floor1_flag[0] = 1;
1267  floor1_flag[1] = 1;
1268  floor1_Y_final[0] = floor1_Y[0];
1269  floor1_Y_final[1] = floor1_Y[1];
1270 
1271  for (i = 2; i < vf->x_list_dim; ++i) {
1272  unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1273 
1274  low_neigh_offs = vf->list[i].low;
1275  high_neigh_offs = vf->list[i].high;
1276  dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1277  adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1278  ady = FFABS(dy);
1279  err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1280  off = err / adx;
1281  if (dy < 0) {
1282  predicted = floor1_Y_final[low_neigh_offs] - off;
1283  } else {
1284  predicted = floor1_Y_final[low_neigh_offs] + off;
1285  } // render_point end
1286 
1287  val = floor1_Y[i];
1288  highroom = range-predicted;
1289  lowroom = predicted;
1290  if (highroom < lowroom) {
1291  room = highroom * 2;
1292  } else {
1293  room = lowroom * 2; // SPEC misspelling
1294  }
1295  if (val) {
1296  floor1_flag[low_neigh_offs] = 1;
1297  floor1_flag[high_neigh_offs] = 1;
1298  floor1_flag[i] = 1;
1299  if (val >= room) {
1300  if (highroom > lowroom) {
1301  floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1302  } else {
1303  floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1304  }
1305  } else {
1306  if (val & 1) {
1307  floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1308  } else {
1309  floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1310  }
1311  }
1312  } else {
1313  floor1_flag[i] = 0;
1314  floor1_Y_final[i] = av_clip_uint16(predicted);
1315  }
1316 
1317  ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1318  vf->list[i].x, floor1_Y_final[i], val);
1319  }
1320 
1321 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1322 
1323  ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1324 
1325  ff_dlog(NULL, " Floor decoded\n");
1326 
1327  return 0;
1328 }
1329 
1331  vorbis_residue *vr,
1332  uint8_t *do_not_decode,
1333  unsigned ch_used,
1334  int partition_count,
1335  int ptns_to_read
1336  )
1337 {
1338  vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1339  int p, j, i;
1340  unsigned c_p_c = codebook->dimensions;
1341  unsigned inverse_class = ff_inverse[vr->classifications];
1342  int temp, temp2;
1343  for (p = 0, j = 0; j < ch_used; ++j) {
1344  if (!do_not_decode[j]) {
1345  temp = get_vlc2(&vc->gb, codebook->vlc.table,
1346  codebook->nb_bits, 3);
1347 
1348  ff_dlog(NULL, "Classword: %u\n", temp);
1349 
1350  av_assert0(temp < 65536);
1351 
1352  if (temp < 0) {
1353  av_log(vc->avctx, AV_LOG_ERROR,
1354  "Invalid vlc code decoding %d channel.", j);
1355  return AVERROR_INVALIDDATA;
1356  }
1357 
1358  av_assert0(vr->classifications > 1); //needed for inverse[]
1359 
1360  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1361  temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1362 
1363  if (i < ptns_to_read)
1364  vr->classifs[p + i] = temp - temp2 * vr->classifications;
1365  temp = temp2;
1366  }
1367  }
1368  p += ptns_to_read;
1369  }
1370  return 0;
1371 }
1372 // Read and decode residue
1373 
1375  vorbis_residue *vr,
1376  unsigned ch,
1377  uint8_t *do_not_decode,
1378  float *vec,
1379  unsigned vlen,
1380  unsigned ch_left,
1381  int vr_type)
1382 {
1383  GetBitContext *gb = &vc->gb;
1384  unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1385  uint8_t *classifs = vr->classifs;
1386  unsigned pass, ch_used, i, j, k, l;
1387  unsigned max_output = (ch - 1) * vlen;
1388  int ptns_to_read = vr->ptns_to_read;
1389  int libvorbis_bug = 0;
1390 
1391  if (vr_type == 2) {
1392  for (j = 1; j < ch; ++j)
1393  do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1394  if (do_not_decode[0])
1395  return 0;
1396  ch_used = 1;
1397  max_output += vr->end / ch;
1398  } else {
1399  ch_used = ch;
1400  max_output += vr->end;
1401  }
1402 
1403  if (max_output > ch_left * vlen) {
1404  if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1405  ptns_to_read--;
1406  libvorbis_bug = 1;
1407  } else {
1408  av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1409  return AVERROR_INVALIDDATA;
1410  }
1411  }
1412 
1413  ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1414 
1415  for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1416  int voffset, partition_count, j_times_ptns_to_read;
1417 
1418  voffset = vr->begin;
1419  for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1420  if (!pass) {
1421  int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1422  if (ret < 0)
1423  return ret;
1424  }
1425  for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1426  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1427  unsigned voffs;
1428 
1429  if (!do_not_decode[j]) {
1430  unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1431  int vqbook = vr->books[vqclass][pass];
1432 
1433  if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1434  unsigned coffs;
1435  unsigned dim = vc->codebooks[vqbook].dimensions;
1436  unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1437  vorbis_codebook codebook = vc->codebooks[vqbook];
1438 
1439  if (vr_type == 0) {
1440 
1441  voffs = voffset+j*vlen;
1442  for (k = 0; k < step; ++k) {
1443  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1444  for (l = 0; l < dim; ++l)
1445  vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1446  }
1447  } else if (vr_type == 1) {
1448  voffs = voffset + j * vlen;
1449  for (k = 0; k < step; ++k) {
1450  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1451  for (l = 0; l < dim; ++l, ++voffs) {
1452  vec[voffs]+=codebook.codevectors[coffs+l];
1453 
1454  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1455  pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1456  }
1457  }
1458  } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1459  voffs = voffset >> 1;
1460 
1461  if (dim == 2) {
1462  for (k = 0; k < step; ++k) {
1463  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1464  vec[voffs + k ] += codebook.codevectors[coffs ];
1465  vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1466  }
1467  } else if (dim == 4) {
1468  for (k = 0; k < step; ++k, voffs += 2) {
1469  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1470  vec[voffs ] += codebook.codevectors[coffs ];
1471  vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1472  vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1473  vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1474  }
1475  } else
1476  for (k = 0; k < step; ++k) {
1477  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1478  for (l = 0; l < dim; l += 2, voffs++) {
1479  vec[voffs ] += codebook.codevectors[coffs + l ];
1480  vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1481 
1482  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1483  pass, voffset / ch + (voffs % ch) * vlen,
1484  vec[voffset / ch + (voffs % ch) * vlen],
1485  codebook.codevectors[coffs + l], coffs, l);
1486  }
1487  }
1488 
1489  } else if (vr_type == 2) {
1490  unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1491  unsigned voffs_mod = voffset - voffs_div * ch;
1492 
1493  for (k = 0; k < step; ++k) {
1494  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1495  for (l = 0; l < dim; ++l) {
1496  vec[voffs_div + voffs_mod * vlen] +=
1497  codebook.codevectors[coffs + l];
1498 
1499  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1500  pass, voffs_div + voffs_mod * vlen,
1501  vec[voffs_div + voffs_mod * vlen],
1502  codebook.codevectors[coffs + l], coffs, l);
1503 
1504  if (++voffs_mod == ch) {
1505  voffs_div++;
1506  voffs_mod = 0;
1507  }
1508  }
1509  }
1510  }
1511  }
1512  }
1513  j_times_ptns_to_read += ptns_to_read;
1514  }
1515  ++partition_count;
1516  voffset += vr->partition_size;
1517  }
1518  }
1519  if (libvorbis_bug && !pass) {
1520  for (j = 0; j < ch_used; ++j) {
1521  if (!do_not_decode[j]) {
1522  get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1523  vc->codebooks[vr->classbook].nb_bits, 3);
1524  }
1525  }
1526  }
1527  }
1528  return 0;
1529 }
1530 
1532  unsigned ch,
1533  uint8_t *do_not_decode,
1534  float *vec, unsigned vlen,
1535  unsigned ch_left)
1536 {
1537  if (vr->type == 2)
1538  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1539  else if (vr->type == 1)
1540  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1541  else if (vr->type == 0)
1542  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1543  else {
1544  av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1545  return AVERROR_INVALIDDATA;
1546  }
1547 }
1548 
1549 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1550 {
1551  int i;
1552  for (i = 0; i < blocksize; i++) {
1553  if (mag[i] > 0.0) {
1554  if (ang[i] > 0.0) {
1555  ang[i] = mag[i] - ang[i];
1556  } else {
1557  float temp = ang[i];
1558  ang[i] = mag[i];
1559  mag[i] += temp;
1560  }
1561  } else {
1562  if (ang[i] > 0.0) {
1563  ang[i] += mag[i];
1564  } else {
1565  float temp = ang[i];
1566  ang[i] = mag[i];
1567  mag[i] -= temp;
1568  }
1569  }
1570  }
1571 }
1572 
1573 // Decode the audio packet using the functions above
1574 
1575 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1576 {
1577  GetBitContext *gb = &vc->gb;
1578  FFTContext *mdct;
1579  int previous_window = vc->previous_window;
1580  unsigned mode_number, blockflag, blocksize;
1581  int i, j;
1582  uint8_t no_residue[255];
1583  uint8_t do_not_decode[255];
1584  vorbis_mapping *mapping;
1585  float *ch_res_ptr = vc->channel_residues;
1586  uint8_t res_chan[255];
1587  unsigned res_num = 0;
1588  int retlen = 0;
1589  unsigned ch_left = vc->audio_channels;
1590  unsigned vlen;
1591 
1592  if (get_bits1(gb)) {
1593  av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1594  return AVERROR_INVALIDDATA; // packet type not audio
1595  }
1596 
1597  if (vc->mode_count == 1) {
1598  mode_number = 0;
1599  } else {
1600  GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1601  }
1602  vc->mode_number = mode_number;
1603  mapping = &vc->mappings[vc->modes[mode_number].mapping];
1604 
1605  ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1606  vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1607 
1608  blockflag = vc->modes[mode_number].blockflag;
1609  blocksize = vc->blocksize[blockflag];
1610  vlen = blocksize / 2;
1611  if (blockflag) {
1612  int code = get_bits(gb, 2);
1613  if (previous_window < 0)
1614  previous_window = code>>1;
1615  } else if (previous_window < 0)
1616  previous_window = 0;
1617 
1618  memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1619  for (i = 0; i < vc->audio_channels; ++i)
1620  memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1621 
1622 // Decode floor
1623 
1624  for (i = 0; i < vc->audio_channels; ++i) {
1625  vorbis_floor *floor;
1626  int ret;
1627  if (mapping->submaps > 1) {
1628  floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1629  } else {
1630  floor = &vc->floors[mapping->submap_floor[0]];
1631  }
1632 
1633  ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1634 
1635  if (ret < 0) {
1636  av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1637  return AVERROR_INVALIDDATA;
1638  }
1639  no_residue[i] = ret;
1640  }
1641 
1642 // Nonzero vector propagate
1643 
1644  for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1645  if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1646  no_residue[mapping->magnitude[i]] = 0;
1647  no_residue[mapping->angle[i]] = 0;
1648  }
1649  }
1650 
1651 // Decode residue
1652 
1653  for (i = 0; i < mapping->submaps; ++i) {
1654  vorbis_residue *residue;
1655  unsigned ch = 0;
1656  int ret;
1657 
1658  for (j = 0; j < vc->audio_channels; ++j) {
1659  if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1660  res_chan[j] = res_num;
1661  if (no_residue[j]) {
1662  do_not_decode[ch] = 1;
1663  } else {
1664  do_not_decode[ch] = 0;
1665  }
1666  ++ch;
1667  ++res_num;
1668  }
1669  }
1670  residue = &vc->residues[mapping->submap_residue[i]];
1671  if (ch_left < ch) {
1672  av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1673  return AVERROR_INVALIDDATA;
1674  }
1675  if (ch) {
1676  ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1677  if (ret < 0)
1678  return ret;
1679  }
1680 
1681  ch_res_ptr += ch * vlen;
1682  ch_left -= ch;
1683  }
1684 
1685  if (ch_left > 0)
1686  return AVERROR_INVALIDDATA;
1687 
1688 // Inverse coupling
1689 
1690  for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1691  float *mag, *ang;
1692 
1693  mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1694  ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1695  vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1696  }
1697 
1698 // Dotproduct, MDCT
1699 
1700  mdct = &vc->mdct[blockflag];
1701 
1702  for (j = vc->audio_channels-1;j >= 0; j--) {
1703  ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1704  vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1705  mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1706  }
1707 
1708 // Overlap/add, save data for next overlapping
1709 
1710  retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1711  for (j = 0; j < vc->audio_channels; j++) {
1712  unsigned bs0 = vc->blocksize[0];
1713  unsigned bs1 = vc->blocksize[1];
1714  float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1715  float *saved = vc->saved + j * bs1 / 4;
1716  float *ret = floor_ptr[j];
1717  float *buf = residue;
1718  const float *win = vc->win[blockflag & previous_window];
1719 
1720  if (blockflag == previous_window) {
1721  vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1722  } else if (blockflag > previous_window) {
1723  vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1724  memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1725  } else {
1726  memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1727  vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1728  }
1729  memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1730  }
1731 
1732  vc->previous_window = blockflag;
1733  return retlen;
1734 }
1735 
1736 // Return the decoded audio packet through the standard api
1737 
1738 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1739  int *got_frame_ptr, AVPacket *avpkt)
1740 {
1741  const uint8_t *buf = avpkt->data;
1742  int buf_size = avpkt->size;
1743  vorbis_context *vc = avctx->priv_data;
1744  AVFrame *frame = data;
1745  GetBitContext *gb = &vc->gb;
1746  float *channel_ptrs[255];
1747  int i, len, ret;
1748 
1749  ff_dlog(NULL, "packet length %d \n", buf_size);
1750 
1751  if (*buf == 1 && buf_size > 7) {
1752  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1753  return ret;
1754 
1755  vorbis_free(vc);
1756  if ((ret = vorbis_parse_id_hdr(vc))) {
1757  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1758  vorbis_free(vc);
1759  return ret;
1760  }
1761 
1762  if (vc->audio_channels > 8)
1763  avctx->channel_layout = 0;
1764  else
1766 
1767  avctx->channels = vc->audio_channels;
1768  avctx->sample_rate = vc->audio_samplerate;
1769  return buf_size;
1770  }
1771 
1772  if (*buf == 3 && buf_size > 7) {
1773  av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1774  return buf_size;
1775  }
1776 
1777  if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1778  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1779  return ret;
1780 
1781  if ((ret = vorbis_parse_setup_hdr(vc))) {
1782  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1783  vorbis_free(vc);
1784  return ret;
1785  }
1786  return buf_size;
1787  }
1788 
1789  if (!vc->channel_residues || !vc->modes) {
1790  av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1791  return AVERROR_INVALIDDATA;
1792  }
1793 
1794  /* get output buffer */
1795  frame->nb_samples = vc->blocksize[1] / 2;
1796  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1797  return ret;
1798 
1799  if (vc->audio_channels > 8) {
1800  for (i = 0; i < vc->audio_channels; i++)
1801  channel_ptrs[i] = (float *)frame->extended_data[i];
1802  } else {
1803  for (i = 0; i < vc->audio_channels; i++) {
1805  channel_ptrs[ch] = (float *)frame->extended_data[i];
1806  }
1807  }
1808 
1809  if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1810  return ret;
1811 
1812  if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1813  return len;
1814 
1815  if (!vc->first_frame) {
1816  vc->first_frame = 1;
1817  *got_frame_ptr = 0;
1818  av_frame_unref(frame);
1819  return buf_size;
1820  }
1821 
1822  ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1823  get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1824 
1825  frame->nb_samples = len;
1826  *got_frame_ptr = 1;
1827 
1828  return buf_size;
1829 }
1830 
1831 // Close decoder
1832 
1834 {
1835  vorbis_context *vc = avctx->priv_data;
1836 
1837  vorbis_free(vc);
1838 
1839  return 0;
1840 }
1841 
1843 {
1844  vorbis_context *vc = avctx->priv_data;
1845 
1846  if (vc->saved) {
1847  memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1848  sizeof(*vc->saved));
1849  }
1850  vc->previous_window = -1;
1851  vc->first_frame = 0;
1852 }
1853 
1855  .name = "vorbis",
1856  .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1857  .type = AVMEDIA_TYPE_AUDIO,
1858  .id = AV_CODEC_ID_VORBIS,
1859  .priv_data_size = sizeof(vorbis_context),
1861  .close = vorbis_decode_close,
1864  .capabilities = AV_CODEC_CAP_DR1,
1866  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1868 };
float, planar
Definition: samplefmt.h:69
vorbis_codebook * codebooks
Definition: vorbisdec.c:142
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
struct vorbis_floor1_s vorbis_floor1
Definition: vorbisdec.c:60
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint16_t windowtype
Definition: vorbisdec.c:120
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n)
Definition: vorbis.c:38
const float * win[2]
Definition: vorbisdec.c:140
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
Definition: vorbisdec.c:499
This structure describes decoded (raw) audio or video data.
Definition: frame.h:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void flush(AVCodecContext *avctx)
void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdec.c:1549
uint32_t version
Definition: vorbisdec.c:133
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:247
else temp
Definition: vf_mcdeint.c:259
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
Definition: vorbisdec.c:1833
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
void(* vorbis_inverse_coupling)(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdsp.h:26
int size
Definition: avcodec.h:1601
int flag
Definition: cpu.c:34
uint8_t dimensions
Definition: vorbisdec.c:50
unsigned partition_size
Definition: vorbisdec.c:99
AVCodecContext * avctx
Definition: vorbisdec.c:126
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:252
static const char idx_err_str[]
Definition: vorbisdec.c:162
#define ilog(i)
Definition: vorbis.h:48
AVCodec.
Definition: avcodec.h:3599
#define V_NB_BITS
Definition: vorbisdec.c:44
float * channel_residues
Definition: vorbisdec.c:153
static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc, vorbis_residue *vr, unsigned ch, uint8_t *do_not_decode, float *vec, unsigned vlen, unsigned ch_left, int vr_type)
Definition: vorbisdec.c:1374
uint32_t audio_samplerate
Definition: vorbisdec.c:135
vorbis_mode * modes
Definition: vorbisdec.c:150
int8_t previous_window
Definition: vorbisdec.c:152
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
static double cb(void *priv, double x, double y)
Definition: vf_geq.c:97
void(* vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len)
Overlap/add with window function.
Definition: float_dsp.h:103
const uint32_t ff_inverse[257]
Definition: mathtables.c:27
uint8_t bits
Definition: crc.c:296
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2445
uint8_t
VorbisDSPContext dsp
Definition: vorbisdec.c:128
#define av_cold
Definition: attributes.h:82
#define av_malloc(s)
uint8_t mapping
Definition: vorbisdec.c:122
uint8_t residue_count
Definition: vorbisdec.c:145
#define BARK(x)
Definition: vorbisdec.c:159
static int vorbis_floor0_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1095
#define VALIDATE_INDEX(idx, limit)
Definition: vorbisdec.c:163
vorbis_residue * residues
Definition: vorbisdec.c:146
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1790
static AVFrame * frame
uint8_t * mux
Definition: vorbisdec.c:113
uint8_t * data
Definition: avcodec.h:1600
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:199
unsigned int nb_bits
Definition: vorbisdec.c:55
uint8_t maxpass
Definition: vorbisdec.c:103
#define ff_dlog(a,...)
bitstream reader API header.
#define av_log(a,...)
FFTContext mdct[2]
Definition: vorbisdec.c:131
#define V_NB_BITS2
Definition: vorbisdec.c:45
int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)
Definition: vorbisdec.c:64
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint16_t transformtype
Definition: vorbisdec.c:121
uint8_t classbook
Definition: vorbisdec.c:101
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: vlc.h:38
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the entry wise product of two vectors of floats and store the result in a vector of floats...
Definition: float_dsp.h:38
#define AVERROR(e)
Definition: error.h:43
static int create_map(vorbis_context *vc, unsigned floor_number)
Definition: vorbisdec.c:850
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
Definition: vorbisdsp.c:24
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
uint8_t mode_number
Definition: vorbisdec.c:151
uint16_t x
Definition: vorbis.h:33
static int vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1203
uint16_t ptns_to_read
Definition: vorbisdec.c:104
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1770
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3606
AVCodec ff_vorbis_decoder
Definition: vorbisdec.c:1854
#define ff_mdct_init
Definition: fft.h:169
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
float * saved
Definition: vorbisdec.c:154
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:226
int8_t exp
Definition: eval.c:64
Definition: vlc.h:26
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2488
#define pass
Definition: fft_template.c:532
uint8_t floor_type
Definition: vorbisdec.c:66
union vorbis_floor_u vorbis_floor_data
Definition: vorbisdec.c:58
uint8_t first_frame
Definition: vorbisdec.c:132
float * codevectors
Definition: vorbisdec.c:54
static int vorbis_parse_id_hdr(vorbis_context *vc)
Definition: vorbisdec.c:960
Definition: fft.h:88
#define V_MAX_VLCS
Definition: vorbisdec.c:46
#define GET_VALIDATED_INDEX(idx, bits, limit)
Definition: vorbisdec.c:170
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:885
#define FFMIN(a, b)
Definition: common.h:96
union vorbis_floor::vorbis_floor_u data
static void vorbis_free(vorbis_context *vc)
Definition: vorbisdec.c:188
int32_t
uint8_t blockflag
Definition: vorbisdec.c:119
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
Definition: vorbis.c:56
struct vorbis_floor0_s vorbis_floor0
Definition: vorbisdec.c:59
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, int first_header_size, const uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:535
int n
Definition: avisynth_c.h:684
uint32_t blocksize[2]
Definition: vorbisdec.c:139
#define L(x)
Definition: vp56_arith.h:36
uint8_t submap_floor[16]
Definition: vorbisdec.c:114
uint16_t coupling_steps
Definition: vorbisdec.c:110
#define INIT_VLC_LE
Definition: vlc.h:54
uint8_t submap_residue[16]
Definition: vorbisdec.c:115
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
Definition: vorbisdec.c:689
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
Definition: vorbisdec.c:770
static av_always_inline int setup_classifs(vorbis_context *vc, vorbis_residue *vr, uint8_t *do_not_decode, unsigned ch_used, int partition_count, int ptns_to_read)
Definition: vorbisdec.c:1330
Libavcodec external API header.
AVFloatDSPContext * fdsp
Definition: vorbisdec.c:129
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1738
int sample_rate
samples per second
Definition: avcodec.h:2437
uint32_t bitrate_minimum
Definition: vorbisdec.c:138
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:437
uint16_t type
Definition: vorbisdec.c:96
uint8_t audio_channels
Definition: vorbisdec.c:134
main external API structure.
Definition: avcodec.h:1675
#define FASTDIV(a, b)
Definition: mathops.h:211
const uint64_t ff_vorbis_channel_layouts[9]
Definition: vorbis_data.c:47
uint8_t * magnitude
Definition: vorbisdec.c:111
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:937
uint8_t maxdepth
Definition: vorbisdec.c:52
void * buf
Definition: avisynth_c.h:690
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:108
int extradata_size
Definition: avcodec.h:1791
uint8_t classifications
Definition: vorbisdec.c:100
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:299
vorbis_mapping * mappings
Definition: vorbisdec.c:148
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:118
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:292
uint8_t mapping_count
Definition: vorbisdec.c:147
uint8_t floor_count
Definition: vorbisdec.c:143
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:406
static int vorbis_parse_setup_hdr(vorbis_context *vc)
Definition: vorbisdec.c:914
int dim
const VDPAUPixFmtMap * map
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:119
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:332
uint32_t bitrate_nominal
Definition: vorbisdec.c:137
uint32_t bitrate_maximum
Definition: vorbisdec.c:136
#define V_MAX_PARTITIONS
Definition: vorbisdec.c:47
const float *const ff_vorbis_vwin[8]
Definition: vorbis_data.c:2190
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
Definition: frame.c:485
uint8_t mode_count
Definition: vorbisdec.c:149
uint16_t codebook_count
Definition: vorbisdec.c:141
static float vorbisfloat2float(unsigned val)
Definition: vorbisdec.c:176
static av_cold int vorbis_decode_init(AVCodecContext *avctx)
Definition: vorbisdec.c:1030
uint8_t * classifs
Definition: vorbisdec.c:105
static int decode(AVCodecContext *avctx, void *data, int *got_sub, AVPacket *avpkt)
Definition: ccaption_dec.c:750
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
#define ff_mdct_end
Definition: fft.h:170
static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, unsigned ch, uint8_t *do_not_decode, float *vec, unsigned vlen, unsigned ch_left)
Definition: vorbisdec.c:1531
uint8_t pi<< 24) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_U8,(uint64_t)((*(constuint8_t *) pi-0x80U))<< 56) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S16,(uint64_t)(*(constint16_t *) pi)<< 48) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_S32,(uint64_t)(*(constint32_t *) pi)<< 32) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S64,(*(constint64_t *) pi >>56)+0x80) CONV_FUNC(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0f/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S64,*(constint64_t *) pi *(1.0/(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_FLT, llrintf(*(constfloat *) pi *(INT64_C(1)<< 63))) CONV_FUNC(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31)))) CONV_FUNC(AV_SAMPLE_FMT_S64, int64_t, AV_SAMPLE_FMT_DBL, llrint(*(constdouble *) pi *(INT64_C(1)<< 63)))#defineFMT_PAIR_FUNC(out, in) staticconv_func_type *constfmt_pair_to_conv_functions[AV_SAMPLE_FMT_NB *AV_SAMPLE_FMT_NB]={FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_U8), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S16), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S32), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_FLT), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_DBL), FMT_PAIR_FUNC(AV_SAMPLE_FMT_U8, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S32, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_DBL, AV_SAMPLE_FMT_S64), FMT_PAIR_FUNC(AV_SAMPLE_FMT_S64, AV_SAMPLE_FMT_S64),};staticvoidcpy1(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, len);}staticvoidcpy2(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 2 *len);}staticvoidcpy4(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 4 *len);}staticvoidcpy8(uint8_t **dst, constuint8_t **src, intlen){memcpy(*dst,*src, 8 *len);}AudioConvert *swri_audio_convert_alloc(enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, constint *ch_map, intflags){AudioConvert *ctx;conv_func_type *f=fmt_pair_to_conv_functions[av_get_packed_sample_fmt(out_fmt)+AV_SAMPLE_FMT_NB *av_get_packed_sample_fmt(in_fmt)];if(!f) returnNULL;ctx=av_mallocz(sizeof(*ctx));if(!ctx) returnNULL;if(channels==1){in_fmt=av_get_planar_sample_fmt(in_fmt);out_fmt=av_get_planar_sample_fmt(out_fmt);}ctx->channels=channels;ctx->conv_f=f;ctx->ch_map=ch_map;if(in_fmt==AV_SAMPLE_FMT_U8||in_fmt==AV_SAMPLE_FMT_U8P) memset(ctx->silence, 0x80, sizeof(ctx->silence));if(out_fmt==in_fmt &&!ch_map){switch(av_get_bytes_per_sample(in_fmt)){case1:ctx->simd_f=cpy1;break;case2:ctx->simd_f=cpy2;break;case4:ctx->simd_f=cpy4;break;case8:ctx->simd_f=cpy8;break;}}if(HAVE_YASM &&1) swri_audio_convert_init_x86(ctx, out_fmt, in_fmt, channels);if(ARCH_ARM) swri_audio_convert_init_arm(ctx, out_fmt, in_fmt, channels);if(ARCH_AARCH64) swri_audio_convert_init_aarch64(ctx, out_fmt, in_fmt, channels);returnctx;}voidswri_audio_convert_free(AudioConvert **ctx){av_freep(ctx);}intswri_audio_convert(AudioConvert *ctx, AudioData *out, AudioData *in, intlen){intch;intoff=0;constintos=(out->planar?1:out->ch_count)*out->bps;unsignedmisaligned=0;av_assert0(ctx->channels==out->ch_count);if(ctx->in_simd_align_mask){intplanes=in->planar?in->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) in->ch[ch];misaligned|=m &ctx->in_simd_align_mask;}if(ctx->out_simd_align_mask){intplanes=out->planar?out->ch_count:1;unsignedm=0;for(ch=0;ch< planes;ch++) m|=(intptr_t) out->ch[ch];misaligned|=m &ctx->out_simd_align_mask;}if(ctx->simd_f &&!ctx->ch_map &&!misaligned){off=len &~15;av_assert1(off >=0);av_assert1(off<=len);av_assert2(ctx->channels==SWR_CH_MAX||!in->ch[ctx->channels]);if(off >0){if(out->planar==in->planar){intplanes=out->planar?out->ch_count:1;for(ch=0;ch< planes;ch++){ctx->simd_f(out-> ch ch
Definition: audioconvert.c:56
GetBitContext gb
Definition: vorbisdec.c:127
vorbis_floor_decode_func decode
Definition: vorbisdec.c:67
void * priv_data
Definition: avcodec.h:1717
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
Definition: vorbisdec.c:473
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
Definition: vorbisdec.c:885
#define av_free(p)
int len
uint8_t * angle
Definition: vorbisdec.c:112
int channels
number of audio channels
Definition: avcodec.h:2438
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
uint32_t end
Definition: vorbisdec.c:98
int16_t books[64][8]
Definition: vorbisdec.c:102
void ff_vorbis_floor1_render_list(vorbis_floor1_entry *list, int values, uint16_t *y_list, int *flag, int multiplier, float *out, int samples)
Definition: vorbis.c:196
uint8_t lookup_type
Definition: vorbisdec.c:51
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:701
struct vorbis_floor::vorbis_floor_u::vorbis_floor0_s t0
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:39
#define M_PI
Definition: mathematics.h:52
#define av_malloc_array(a, b)
vorbis_floor * floors
Definition: vorbisdec.c:144
uint32_t begin
Definition: vorbisdec.c:97
const uint8_t ff_vorbis_channel_layout_offsets[8][8]
Definition: vorbis_data.c:25
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
Definition: vorbisdec.c:1842
Definition: vorbis.h:32
This structure stores compressed data.
Definition: avcodec.h:1577
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
Definition: vorbisdec.c:238
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:360
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
Definition: vorbisdec.c:1575
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:958
uint8_t submaps
Definition: vorbisdec.c:109
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, vorbis_floor1_entry *list, int values)
Definition: vorbis.c:106