vorbisdec.c
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1 /*
2  * This file is part of Libav.
3  *
4  * Libav is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * Libav is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
25 #include <inttypes.h>
26 #include <math.h>
27 
28 #define BITSTREAM_READER_LE
29 #include "libavutil/float_dsp.h"
30 #include "avcodec.h"
31 #include "get_bits.h"
32 #include "dsputil.h"
33 #include "fft.h"
34 #include "fmtconvert.h"
35 #include "internal.h"
36 
37 #include "vorbis.h"
38 #include "xiph.h"
39 
40 #define V_NB_BITS 8
41 #define V_NB_BITS2 11
42 #define V_MAX_VLCS (1 << 16)
43 #define V_MAX_PARTITIONS (1 << 20)
44 
45 #undef NDEBUG
46 #include <assert.h>
47 
48 typedef struct {
53  float *codevectors;
54  unsigned int nb_bits;
56 
57 typedef union vorbis_floor_u vorbis_floor_data;
58 typedef struct vorbis_floor0_s vorbis_floor0;
59 typedef struct vorbis_floor1_s vorbis_floor1;
60 struct vorbis_context_s;
61 typedef
63  (struct vorbis_context_s *, vorbis_floor_data *, float *);
64 typedef struct {
68  struct vorbis_floor0_s {
70  uint16_t rate;
71  uint16_t bark_map_size;
72  int32_t *map[2];
73  uint32_t map_size[2];
78  float *lsp;
79  } t0;
80  struct vorbis_floor1_s {
82  uint8_t partition_class[32];
83  uint8_t class_dimensions[16];
84  uint8_t class_subclasses[16];
85  uint8_t class_masterbook[16];
86  int16_t subclass_books[16][8];
88  uint16_t x_list_dim;
90  } t1;
91  } data;
92 } vorbis_floor;
93 
94 typedef struct {
95  uint16_t type;
96  uint32_t begin;
97  uint32_t end;
98  unsigned partition_size;
101  int16_t books[64][8];
103  uint16_t ptns_to_read;
106 
107 typedef struct {
109  uint16_t coupling_steps;
113  uint8_t submap_floor[16];
114  uint8_t submap_residue[16];
116 
117 typedef struct {
119  uint16_t windowtype;
120  uint16_t transformtype;
122 } vorbis_mode;
123 
124 typedef struct vorbis_context_s {
131 
134  uint32_t version;
137  uint32_t bitrate_maximum;
138  uint32_t bitrate_nominal;
139  uint32_t bitrate_minimum;
140  uint32_t blocksize[2];
141  const float *win[2];
142  uint16_t codebook_count;
152  uint8_t mode_number; // mode number for the current packet
155  float *saved;
157 
158 /* Helper functions */
159 
160 #define BARK(x) \
161  (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
162 
163 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
164 #define VALIDATE_INDEX(idx, limit) \
165  if (idx >= limit) {\
166  av_log(vc->avccontext, AV_LOG_ERROR,\
167  idx_err_str,\
168  (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
169  return AVERROR_INVALIDDATA;\
170  }
171 #define GET_VALIDATED_INDEX(idx, bits, limit) \
172  {\
173  idx = get_bits(gb, bits);\
174  VALIDATE_INDEX(idx, limit)\
175  }
176 
177 static float vorbisfloat2float(unsigned val)
178 {
179  double mant = val & 0x1fffff;
180  long exp = (val & 0x7fe00000L) >> 21;
181  if (val & 0x80000000)
182  mant = -mant;
183  return ldexp(mant, exp - 20 - 768);
184 }
185 
186 
187 // Free all allocated memory -----------------------------------------
188 
189 static void vorbis_free(vorbis_context *vc)
190 {
191  int i;
192 
194  av_freep(&vc->saved);
195 
196  for (i = 0; i < vc->residue_count; i++)
197  av_free(vc->residues[i].classifs);
198  av_freep(&vc->residues);
199  av_freep(&vc->modes);
200 
201  ff_mdct_end(&vc->mdct[0]);
202  ff_mdct_end(&vc->mdct[1]);
203 
204  for (i = 0; i < vc->codebook_count; ++i) {
205  av_free(vc->codebooks[i].codevectors);
206  ff_free_vlc(&vc->codebooks[i].vlc);
207  }
208  av_freep(&vc->codebooks);
209 
210  for (i = 0; i < vc->floor_count; ++i) {
211  if (vc->floors[i].floor_type == 0) {
212  av_free(vc->floors[i].data.t0.map[0]);
213  av_free(vc->floors[i].data.t0.map[1]);
214  av_free(vc->floors[i].data.t0.book_list);
215  av_free(vc->floors[i].data.t0.lsp);
216  } else {
217  av_free(vc->floors[i].data.t1.list);
218  }
219  }
220  av_freep(&vc->floors);
221 
222  for (i = 0; i < vc->mapping_count; ++i) {
223  av_free(vc->mappings[i].magnitude);
224  av_free(vc->mappings[i].angle);
225  av_free(vc->mappings[i].mux);
226  }
227  av_freep(&vc->mappings);
228 }
229 
230 // Parse setup header -------------------------------------------------
231 
232 // Process codebooks part
233 
235 {
236  unsigned cb;
237  uint8_t *tmp_vlc_bits;
238  uint32_t *tmp_vlc_codes;
239  GetBitContext *gb = &vc->gb;
240  uint16_t *codebook_multiplicands;
241  int ret = 0;
242 
243  vc->codebook_count = get_bits(gb, 8) + 1;
244 
245  av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
246 
247  vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
248  tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
249  tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
250  codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
251 
252  for (cb = 0; cb < vc->codebook_count; ++cb) {
253  vorbis_codebook *codebook_setup = &vc->codebooks[cb];
254  unsigned ordered, t, entries, used_entries = 0;
255 
256  av_dlog(NULL, " %u. Codebook\n", cb);
257 
258  if (get_bits(gb, 24) != 0x564342) {
260  " %u. Codebook setup data corrupt.\n", cb);
261  ret = AVERROR_INVALIDDATA;
262  goto error;
263  }
264 
265  codebook_setup->dimensions=get_bits(gb, 16);
266  if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
268  " %u. Codebook's dimension is invalid (%d).\n",
269  cb, codebook_setup->dimensions);
270  ret = AVERROR_INVALIDDATA;
271  goto error;
272  }
273  entries = get_bits(gb, 24);
274  if (entries > V_MAX_VLCS) {
276  " %u. Codebook has too many entries (%u).\n",
277  cb, entries);
278  ret = AVERROR_INVALIDDATA;
279  goto error;
280  }
281 
282  ordered = get_bits1(gb);
283 
284  av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
285  codebook_setup->dimensions, entries);
286 
287  if (!ordered) {
288  unsigned ce, flag;
289  unsigned sparse = get_bits1(gb);
290 
291  av_dlog(NULL, " not ordered \n");
292 
293  if (sparse) {
294  av_dlog(NULL, " sparse \n");
295 
296  used_entries = 0;
297  for (ce = 0; ce < entries; ++ce) {
298  flag = get_bits1(gb);
299  if (flag) {
300  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
301  ++used_entries;
302  } else
303  tmp_vlc_bits[ce] = 0;
304  }
305  } else {
306  av_dlog(NULL, " not sparse \n");
307 
308  used_entries = entries;
309  for (ce = 0; ce < entries; ++ce)
310  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
311  }
312  } else {
313  unsigned current_entry = 0;
314  unsigned current_length = get_bits(gb, 5) + 1;
315 
316  av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
317 
318  used_entries = entries;
319  for (; current_entry < used_entries && current_length <= 32; ++current_length) {
320  unsigned i, number;
321 
322  av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
323 
324  number = get_bits(gb, ilog(entries - current_entry));
325 
326  av_dlog(NULL, " number: %u\n", number);
327 
328  for (i = current_entry; i < number+current_entry; ++i)
329  if (i < used_entries)
330  tmp_vlc_bits[i] = current_length;
331 
332  current_entry+=number;
333  }
334  if (current_entry>used_entries) {
335  av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
336  ret = AVERROR_INVALIDDATA;
337  goto error;
338  }
339  }
340 
341  codebook_setup->lookup_type = get_bits(gb, 4);
342 
343  av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
344  codebook_setup->lookup_type ? "vq" : "no lookup");
345 
346 // If the codebook is used for (inverse) VQ, calculate codevectors.
347 
348  if (codebook_setup->lookup_type == 1) {
349  unsigned i, j, k;
350  unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
351 
352  float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
353  float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
354  unsigned codebook_value_bits = get_bits(gb, 4) + 1;
355  unsigned codebook_sequence_p = get_bits1(gb);
356 
357  av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
358  codebook_lookup_values);
359  av_dlog(NULL, " delta %f minmum %f \n",
360  codebook_delta_value, codebook_minimum_value);
361 
362  for (i = 0; i < codebook_lookup_values; ++i) {
363  codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
364 
365  av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
366  (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
367  av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
368  }
369 
370 // Weed out unused vlcs and build codevector vector
371  codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
372  codebook_setup->dimensions *
373  sizeof(*codebook_setup->codevectors))
374  : NULL;
375  for (j = 0, i = 0; i < entries; ++i) {
376  unsigned dim = codebook_setup->dimensions;
377 
378  if (tmp_vlc_bits[i]) {
379  float last = 0.0;
380  unsigned lookup_offset = i;
381 
382  av_dlog(vc->avccontext, "Lookup offset %u ,", i);
383 
384  for (k = 0; k < dim; ++k) {
385  unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
386  codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
387  if (codebook_sequence_p)
388  last = codebook_setup->codevectors[j * dim + k];
389  lookup_offset/=codebook_lookup_values;
390  }
391  tmp_vlc_bits[j] = tmp_vlc_bits[i];
392 
393  av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
394  for (k = 0; k < dim; ++k)
395  av_dlog(vc->avccontext, " %f ",
396  codebook_setup->codevectors[j * dim + k]);
397  av_dlog(vc->avccontext, "\n");
398 
399  ++j;
400  }
401  }
402  if (j != used_entries) {
403  av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
404  ret = AVERROR_INVALIDDATA;
405  goto error;
406  }
407  entries = used_entries;
408  } else if (codebook_setup->lookup_type >= 2) {
409  av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
410  ret = AVERROR_INVALIDDATA;
411  goto error;
412  }
413 
414 // Initialize VLC table
415  if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
416  av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
417  ret = AVERROR_INVALIDDATA;
418  goto error;
419  }
420  codebook_setup->maxdepth = 0;
421  for (t = 0; t < entries; ++t)
422  if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
423  codebook_setup->maxdepth = tmp_vlc_bits[t];
424 
425  if (codebook_setup->maxdepth > 3 * V_NB_BITS)
426  codebook_setup->nb_bits = V_NB_BITS2;
427  else
428  codebook_setup->nb_bits = V_NB_BITS;
429 
430  codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
431 
432  if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
433  entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
434  sizeof(*tmp_vlc_bits), tmp_vlc_codes,
435  sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
436  INIT_VLC_LE))) {
437  av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
438  goto error;
439  }
440  }
441 
442  av_free(tmp_vlc_bits);
443  av_free(tmp_vlc_codes);
444  av_free(codebook_multiplicands);
445  return 0;
446 
447 // Error:
448 error:
449  av_free(tmp_vlc_bits);
450  av_free(tmp_vlc_codes);
451  av_free(codebook_multiplicands);
452  return ret;
453 }
454 
455 // Process time domain transforms part (unused in Vorbis I)
456 
458 {
459  GetBitContext *gb = &vc->gb;
460  unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
461 
462  for (i = 0; i < vorbis_time_count; ++i) {
463  unsigned vorbis_tdtransform = get_bits(gb, 16);
464 
465  av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
466  vorbis_time_count, vorbis_tdtransform);
467 
468  if (vorbis_tdtransform) {
469  av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
470  return AVERROR_INVALIDDATA;
471  }
472  }
473  return 0;
474 }
475 
476 // Process floors part
477 
478 static int vorbis_floor0_decode(vorbis_context *vc,
479  vorbis_floor_data *vfu, float *vec);
480 static void create_map(vorbis_context *vc, unsigned floor_number);
481 static int vorbis_floor1_decode(vorbis_context *vc,
482  vorbis_floor_data *vfu, float *vec);
484 {
485  GetBitContext *gb = &vc->gb;
486  int i,j,k;
487 
488  vc->floor_count = get_bits(gb, 6) + 1;
489 
490  vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
491 
492  for (i = 0; i < vc->floor_count; ++i) {
493  vorbis_floor *floor_setup = &vc->floors[i];
494 
495  floor_setup->floor_type = get_bits(gb, 16);
496 
497  av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
498 
499  if (floor_setup->floor_type == 1) {
500  int maximum_class = -1;
501  unsigned rangebits, rangemax, floor1_values = 2;
502 
503  floor_setup->decode = vorbis_floor1_decode;
504 
505  floor_setup->data.t1.partitions = get_bits(gb, 5);
506 
507  av_dlog(NULL, " %d.floor: %d partitions \n",
508  i, floor_setup->data.t1.partitions);
509 
510  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
511  floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
512  if (floor_setup->data.t1.partition_class[j] > maximum_class)
513  maximum_class = floor_setup->data.t1.partition_class[j];
514 
515  av_dlog(NULL, " %d. floor %d partition class %d \n",
516  i, j, floor_setup->data.t1.partition_class[j]);
517 
518  }
519 
520  av_dlog(NULL, " maximum class %d \n", maximum_class);
521 
522  for (j = 0; j <= maximum_class; ++j) {
523  floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
524  floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
525 
526  av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
527  floor_setup->data.t1.class_dimensions[j],
528  floor_setup->data.t1.class_subclasses[j]);
529 
530  if (floor_setup->data.t1.class_subclasses[j]) {
532 
533  av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
534  }
535 
536  for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
537  int16_t bits = get_bits(gb, 8) - 1;
538  if (bits != -1)
539  VALIDATE_INDEX(bits, vc->codebook_count)
540  floor_setup->data.t1.subclass_books[j][k] = bits;
541 
542  av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
543  }
544  }
545 
546  floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
547  floor_setup->data.t1.x_list_dim = 2;
548 
549  for (j = 0; j < floor_setup->data.t1.partitions; ++j)
550  floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
551 
552  floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
553  sizeof(*floor_setup->data.t1.list));
554 
555 
556  rangebits = get_bits(gb, 4);
557  rangemax = (1 << rangebits);
558  if (rangemax > vc->blocksize[1] / 2) {
560  "Floor value is too large for blocksize: %u (%"PRIu32")\n",
561  rangemax, vc->blocksize[1] / 2);
562  return AVERROR_INVALIDDATA;
563  }
564  floor_setup->data.t1.list[0].x = 0;
565  floor_setup->data.t1.list[1].x = rangemax;
566 
567  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
568  for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
569  floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
570 
571  av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
572  floor_setup->data.t1.list[floor1_values].x);
573  }
574  }
575 
576 // Precalculate order of x coordinates - needed for decode
578  floor_setup->data.t1.list,
579  floor_setup->data.t1.x_list_dim)) {
580  return AVERROR_INVALIDDATA;
581  }
582  } else if (floor_setup->floor_type == 0) {
583  unsigned max_codebook_dim = 0;
584 
585  floor_setup->decode = vorbis_floor0_decode;
586 
587  floor_setup->data.t0.order = get_bits(gb, 8);
588  if (!floor_setup->data.t0.order) {
590  "Floor 0 order is 0.\n");
591  return AVERROR_INVALIDDATA;
592  }
593  floor_setup->data.t0.rate = get_bits(gb, 16);
594  if (!floor_setup->data.t0.rate) {
596  "Floor 0 rate is 0.\n");
597  return AVERROR_INVALIDDATA;
598  }
599  floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
600  if (floor_setup->data.t0.bark_map_size == 0) {
602  "Floor 0 bark map size is 0.\n");
603  return AVERROR_INVALIDDATA;
604  }
605  floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
606  floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
607  floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
608 
609  /* allocate mem for booklist */
610  floor_setup->data.t0.book_list =
611  av_malloc(floor_setup->data.t0.num_books);
612  if (!floor_setup->data.t0.book_list)
613  return AVERROR(ENOMEM);
614  /* read book indexes */
615  {
616  int idx;
617  unsigned book_idx;
618  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
619  GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
620  floor_setup->data.t0.book_list[idx] = book_idx;
621  if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
622  max_codebook_dim = vc->codebooks[book_idx].dimensions;
623  }
624  }
625 
626  create_map(vc, i);
627 
628  /* codebook dim is for padding if codebook dim doesn't *
629  * divide order+1 then we need to read more data */
630  floor_setup->data.t0.lsp =
631  av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
632  * sizeof(*floor_setup->data.t0.lsp));
633  if (!floor_setup->data.t0.lsp)
634  return AVERROR(ENOMEM);
635 
636  /* debug output parsed headers */
637  av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
638  av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
639  av_dlog(NULL, "floor0 bark map size: %u\n",
640  floor_setup->data.t0.bark_map_size);
641  av_dlog(NULL, "floor0 amplitude bits: %u\n",
642  floor_setup->data.t0.amplitude_bits);
643  av_dlog(NULL, "floor0 amplitude offset: %u\n",
644  floor_setup->data.t0.amplitude_offset);
645  av_dlog(NULL, "floor0 number of books: %u\n",
646  floor_setup->data.t0.num_books);
647  av_dlog(NULL, "floor0 book list pointer: %p\n",
648  floor_setup->data.t0.book_list);
649  {
650  int idx;
651  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
652  av_dlog(NULL, " Book %d: %u\n", idx + 1,
653  floor_setup->data.t0.book_list[idx]);
654  }
655  }
656  } else {
657  av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
658  return AVERROR_INVALIDDATA;
659  }
660  }
661  return 0;
662 }
663 
664 // Process residues part
665 
667 {
668  GetBitContext *gb = &vc->gb;
669  unsigned i, j, k;
670 
671  vc->residue_count = get_bits(gb, 6)+1;
672  vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
673 
674  av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
675 
676  for (i = 0; i < vc->residue_count; ++i) {
677  vorbis_residue *res_setup = &vc->residues[i];
678  uint8_t cascade[64];
679  unsigned high_bits, low_bits;
680 
681  res_setup->type = get_bits(gb, 16);
682 
683  av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
684 
685  res_setup->begin = get_bits(gb, 24);
686  res_setup->end = get_bits(gb, 24);
687  res_setup->partition_size = get_bits(gb, 24) + 1;
688  /* Validations to prevent a buffer overflow later. */
689  if (res_setup->begin>res_setup->end ||
690  res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
691  (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
693  "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
694  res_setup->type, res_setup->begin, res_setup->end,
695  res_setup->partition_size, vc->blocksize[1] / 2);
696  return AVERROR_INVALIDDATA;
697  }
698 
699  res_setup->classifications = get_bits(gb, 6) + 1;
700  GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
701 
702  res_setup->ptns_to_read =
703  (res_setup->end - res_setup->begin) / res_setup->partition_size;
704  res_setup->classifs = av_malloc(res_setup->ptns_to_read *
705  vc->audio_channels *
706  sizeof(*res_setup->classifs));
707  if (!res_setup->classifs)
708  return AVERROR(ENOMEM);
709 
710  av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
711  res_setup->begin, res_setup->end, res_setup->partition_size,
712  res_setup->classifications, res_setup->classbook);
713 
714  for (j = 0; j < res_setup->classifications; ++j) {
715  high_bits = 0;
716  low_bits = get_bits(gb, 3);
717  if (get_bits1(gb))
718  high_bits = get_bits(gb, 5);
719  cascade[j] = (high_bits << 3) + low_bits;
720 
721  av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
722  }
723 
724  res_setup->maxpass = 0;
725  for (j = 0; j < res_setup->classifications; ++j) {
726  for (k = 0; k < 8; ++k) {
727  if (cascade[j]&(1 << k)) {
728  GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
729 
730  av_dlog(NULL, " %u class cascade depth %u book: %d\n",
731  j, k, res_setup->books[j][k]);
732 
733  if (k>res_setup->maxpass)
734  res_setup->maxpass = k;
735  } else {
736  res_setup->books[j][k] = -1;
737  }
738  }
739  }
740  }
741  return 0;
742 }
743 
744 // Process mappings part
745 
747 {
748  GetBitContext *gb = &vc->gb;
749  unsigned i, j;
750 
751  vc->mapping_count = get_bits(gb, 6)+1;
752  vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
753 
754  av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
755 
756  for (i = 0; i < vc->mapping_count; ++i) {
757  vorbis_mapping *mapping_setup = &vc->mappings[i];
758 
759  if (get_bits(gb, 16)) {
760  av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
761  return AVERROR_INVALIDDATA;
762  }
763  if (get_bits1(gb)) {
764  mapping_setup->submaps = get_bits(gb, 4) + 1;
765  } else {
766  mapping_setup->submaps = 1;
767  }
768 
769  if (get_bits1(gb)) {
770  mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
771  mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
772  sizeof(*mapping_setup->magnitude));
773  mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
774  sizeof(*mapping_setup->angle));
775  for (j = 0; j < mapping_setup->coupling_steps; ++j) {
776  GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
777  GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
778  }
779  } else {
780  mapping_setup->coupling_steps = 0;
781  }
782 
783  av_dlog(NULL, " %u mapping coupling steps: %d\n",
784  i, mapping_setup->coupling_steps);
785 
786  if (get_bits(gb, 2)) {
787  av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
788  return AVERROR_INVALIDDATA; // following spec.
789  }
790 
791  if (mapping_setup->submaps>1) {
792  mapping_setup->mux = av_mallocz(vc->audio_channels *
793  sizeof(*mapping_setup->mux));
794  for (j = 0; j < vc->audio_channels; ++j)
795  mapping_setup->mux[j] = get_bits(gb, 4);
796  }
797 
798  for (j = 0; j < mapping_setup->submaps; ++j) {
799  skip_bits(gb, 8); // FIXME check?
800  GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
801  GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
802 
803  av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
804  mapping_setup->submap_floor[j],
805  mapping_setup->submap_residue[j]);
806  }
807  }
808  return 0;
809 }
810 
811 // Process modes part
812 
813 static void create_map(vorbis_context *vc, unsigned floor_number)
814 {
815  vorbis_floor *floors = vc->floors;
816  vorbis_floor0 *vf;
817  int idx;
818  int blockflag, n;
819  int32_t *map;
820 
821  for (blockflag = 0; blockflag < 2; ++blockflag) {
822  n = vc->blocksize[blockflag] / 2;
823  floors[floor_number].data.t0.map[blockflag] =
824  av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
825 
826  map = floors[floor_number].data.t0.map[blockflag];
827  vf = &floors[floor_number].data.t0;
828 
829  for (idx = 0; idx < n; ++idx) {
830  map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
831  (vf->bark_map_size / BARK(vf->rate / 2.0f)));
832  if (vf->bark_map_size-1 < map[idx])
833  map[idx] = vf->bark_map_size - 1;
834  }
835  map[n] = -1;
836  vf->map_size[blockflag] = n;
837  }
838 
839  for (idx = 0; idx <= n; ++idx) {
840  av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
841  }
842 }
843 
845 {
846  GetBitContext *gb = &vc->gb;
847  unsigned i;
848 
849  vc->mode_count = get_bits(gb, 6) + 1;
850  vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
851 
852  av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
853 
854  for (i = 0; i < vc->mode_count; ++i) {
855  vorbis_mode *mode_setup = &vc->modes[i];
856 
857  mode_setup->blockflag = get_bits1(gb);
858  mode_setup->windowtype = get_bits(gb, 16); //FIXME check
859  mode_setup->transformtype = get_bits(gb, 16); //FIXME check
860  GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
861 
862  av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
863  i, mode_setup->blockflag, mode_setup->windowtype,
864  mode_setup->transformtype, mode_setup->mapping);
865  }
866  return 0;
867 }
868 
869 // Process the whole setup header using the functions above
870 
872 {
873  GetBitContext *gb = &vc->gb;
874  int ret;
875 
876  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
877  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
878  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
879  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
880  return AVERROR_INVALIDDATA;
881  }
882 
883  if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
884  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
885  return ret;
886  }
887  if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
888  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
889  return ret;
890  }
891  if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
892  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
893  return ret;
894  }
895  if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
896  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
897  return ret;
898  }
899  if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
900  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
901  return ret;
902  }
903  if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
904  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
905  return ret;
906  }
907  if (!get_bits1(gb)) {
908  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
909  return AVERROR_INVALIDDATA; // framing flag bit unset error
910  }
911 
912  return 0;
913 }
914 
915 // Process the identification header
916 
918 {
919  GetBitContext *gb = &vc->gb;
920  unsigned bl0, bl1;
921 
922  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
923  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
924  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
925  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
926  return AVERROR_INVALIDDATA;
927  }
928 
929  vc->version = get_bits_long(gb, 32); //FIXME check 0
930  vc->audio_channels = get_bits(gb, 8);
931  if (vc->audio_channels <= 0) {
932  av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
933  return AVERROR_INVALIDDATA;
934  }
935  vc->audio_samplerate = get_bits_long(gb, 32);
936  if (vc->audio_samplerate <= 0) {
937  av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
938  return AVERROR_INVALIDDATA;
939  }
940  vc->bitrate_maximum = get_bits_long(gb, 32);
941  vc->bitrate_nominal = get_bits_long(gb, 32);
942  vc->bitrate_minimum = get_bits_long(gb, 32);
943  bl0 = get_bits(gb, 4);
944  bl1 = get_bits(gb, 4);
945  vc->blocksize[0] = (1 << bl0);
946  vc->blocksize[1] = (1 << bl1);
947  if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
948  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
949  return AVERROR_INVALIDDATA;
950  }
951  vc->win[0] = ff_vorbis_vwin[bl0 - 6];
952  vc->win[1] = ff_vorbis_vwin[bl1 - 6];
953 
954  if ((get_bits1(gb)) == 0) {
955  av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
956  return AVERROR_INVALIDDATA;
957  }
958 
959  vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
960  vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
961  vc->previous_window = 0;
962 
963  ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
964  ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
965 
966  av_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 ",
968 
969 /*
970  BLK = vc->blocksize[0];
971  for (i = 0; i < BLK / 2; ++i) {
972  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)));
973  }
974 */
975 
976  return 0;
977 }
978 
979 // Process the extradata using the functions above (identification header, setup header)
980 
982 {
983  vorbis_context *vc = avccontext->priv_data;
984  uint8_t *headers = avccontext->extradata;
985  int headers_len = avccontext->extradata_size;
986  uint8_t *header_start[3];
987  int header_len[3];
988  GetBitContext *gb = &vc->gb;
989  int hdr_type, ret;
990 
991  vc->avccontext = avccontext;
992  ff_dsputil_init(&vc->dsp, avccontext);
994  ff_fmt_convert_init(&vc->fmt_conv, avccontext);
995 
996  avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
997 
998  if (!headers_len) {
999  av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
1000  return AVERROR_INVALIDDATA;
1001  }
1002 
1003  if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1004  av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1005  return ret;
1006  }
1007 
1008  init_get_bits(gb, header_start[0], header_len[0]*8);
1009  hdr_type = get_bits(gb, 8);
1010  if (hdr_type != 1) {
1011  av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1012  return AVERROR_INVALIDDATA;
1013  }
1014  if ((ret = vorbis_parse_id_hdr(vc))) {
1015  av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1016  vorbis_free(vc);
1017  return ret;
1018  }
1019 
1020  init_get_bits(gb, header_start[2], header_len[2]*8);
1021  hdr_type = get_bits(gb, 8);
1022  if (hdr_type != 5) {
1023  av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1024  vorbis_free(vc);
1025  return AVERROR_INVALIDDATA;
1026  }
1027  if ((ret = vorbis_parse_setup_hdr(vc))) {
1028  av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1029  vorbis_free(vc);
1030  return ret;
1031  }
1032 
1033  if (vc->audio_channels > 8)
1034  avccontext->channel_layout = 0;
1035  else
1037 
1038  avccontext->channels = vc->audio_channels;
1039  avccontext->sample_rate = vc->audio_samplerate;
1040 
1042  avccontext->coded_frame = &vc->frame;
1043 
1044  return 0;
1045 }
1046 
1047 // Decode audiopackets -------------------------------------------------
1048 
1049 // Read and decode floor
1050 
1052  vorbis_floor_data *vfu, float *vec)
1053 {
1054  vorbis_floor0 *vf = &vfu->t0;
1055  float *lsp = vf->lsp;
1056  unsigned amplitude, book_idx;
1057  unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1058 
1059  if (!vf->amplitude_bits)
1060  return 1;
1061 
1062  amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1063  if (amplitude > 0) {
1064  float last = 0;
1065  unsigned idx, lsp_len = 0;
1066  vorbis_codebook codebook;
1067 
1068  book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1069  if (book_idx >= vf->num_books) {
1071  "floor0 dec: booknumber too high!\n");
1072  book_idx = 0;
1073  }
1074  av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1075  codebook = vc->codebooks[vf->book_list[book_idx]];
1076  /* Invalid codebook! */
1077  if (!codebook.codevectors)
1078  return AVERROR_INVALIDDATA;
1079 
1080  while (lsp_len<vf->order) {
1081  int vec_off;
1082 
1083  av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1084  av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1085  /* read temp vector */
1086  vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1087  codebook.nb_bits, codebook.maxdepth)
1088  * codebook.dimensions;
1089  av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1090  /* copy each vector component and add last to it */
1091  for (idx = 0; idx < codebook.dimensions; ++idx)
1092  lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1093  last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1094 
1095  lsp_len += codebook.dimensions;
1096  }
1097  /* DEBUG: output lsp coeffs */
1098  {
1099  int idx;
1100  for (idx = 0; idx < lsp_len; ++idx)
1101  av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1102  }
1103 
1104  /* synthesize floor output vector */
1105  {
1106  int i;
1107  int order = vf->order;
1108  float wstep = M_PI / vf->bark_map_size;
1109 
1110  for (i = 0; i < order; i++)
1111  lsp[i] = 2.0f * cos(lsp[i]);
1112 
1113  av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1114  vf->map_size[blockflag], order, wstep);
1115 
1116  i = 0;
1117  while (i < vf->map_size[blockflag]) {
1118  int j, iter_cond = vf->map[blockflag][i];
1119  float p = 0.5f;
1120  float q = 0.5f;
1121  float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1122 
1123  /* similar part for the q and p products */
1124  for (j = 0; j + 1 < order; j += 2) {
1125  q *= lsp[j] - two_cos_w;
1126  p *= lsp[j + 1] - two_cos_w;
1127  }
1128  if (j == order) { // even order
1129  p *= p * (2.0f - two_cos_w);
1130  q *= q * (2.0f + two_cos_w);
1131  } else { // odd order
1132  q *= two_cos_w-lsp[j]; // one more time for q
1133 
1134  /* final step and square */
1135  p *= p * (4.f - two_cos_w * two_cos_w);
1136  q *= q;
1137  }
1138 
1139  /* calculate linear floor value */
1140  q = exp((((amplitude*vf->amplitude_offset) /
1141  (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1142  - vf->amplitude_offset) * .11512925f);
1143 
1144  /* fill vector */
1145  do {
1146  vec[i] = q; ++i;
1147  } while (vf->map[blockflag][i] == iter_cond);
1148  }
1149  }
1150  } else {
1151  /* this channel is unused */
1152  return 1;
1153  }
1154 
1155  av_dlog(NULL, " Floor0 decoded\n");
1156 
1157  return 0;
1158 }
1159 
1161  vorbis_floor_data *vfu, float *vec)
1162 {
1163  vorbis_floor1 *vf = &vfu->t1;
1164  GetBitContext *gb = &vc->gb;
1165  uint16_t range_v[4] = { 256, 128, 86, 64 };
1166  unsigned range = range_v[vf->multiplier - 1];
1167  uint16_t floor1_Y[258];
1168  uint16_t floor1_Y_final[258];
1169  int floor1_flag[258];
1170  unsigned class, cdim, cbits, csub, cval, offset, i, j;
1171  int book, adx, ady, dy, off, predicted, err;
1172 
1173 
1174  if (!get_bits1(gb)) // silence
1175  return 1;
1176 
1177 // Read values (or differences) for the floor's points
1178 
1179  floor1_Y[0] = get_bits(gb, ilog(range - 1));
1180  floor1_Y[1] = get_bits(gb, ilog(range - 1));
1181 
1182  av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1183 
1184  offset = 2;
1185  for (i = 0; i < vf->partitions; ++i) {
1186  class = vf->partition_class[i];
1187  cdim = vf->class_dimensions[class];
1188  cbits = vf->class_subclasses[class];
1189  csub = (1 << cbits) - 1;
1190  cval = 0;
1191 
1192  av_dlog(NULL, "Cbits %u\n", cbits);
1193 
1194  if (cbits) // this reads all subclasses for this partition's class
1195  cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1196  vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1197 
1198  for (j = 0; j < cdim; ++j) {
1199  book = vf->subclass_books[class][cval & csub];
1200 
1201  av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1202  book, cbits, cval, get_bits_count(gb));
1203 
1204  cval = cval >> cbits;
1205  if (book > -1) {
1206  floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1207  vc->codebooks[book].nb_bits, 3);
1208  } else {
1209  floor1_Y[offset+j] = 0;
1210  }
1211 
1212  av_dlog(NULL, " floor(%d) = %d \n",
1213  vf->list[offset+j].x, floor1_Y[offset+j]);
1214  }
1215  offset+=cdim;
1216  }
1217 
1218 // Amplitude calculation from the differences
1219 
1220  floor1_flag[0] = 1;
1221  floor1_flag[1] = 1;
1222  floor1_Y_final[0] = floor1_Y[0];
1223  floor1_Y_final[1] = floor1_Y[1];
1224 
1225  for (i = 2; i < vf->x_list_dim; ++i) {
1226  unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1227 
1228  low_neigh_offs = vf->list[i].low;
1229  high_neigh_offs = vf->list[i].high;
1230  dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1231  adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1232  ady = FFABS(dy);
1233  err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1234  off = err / adx;
1235  if (dy < 0) {
1236  predicted = floor1_Y_final[low_neigh_offs] - off;
1237  } else {
1238  predicted = floor1_Y_final[low_neigh_offs] + off;
1239  } // render_point end
1240 
1241  val = floor1_Y[i];
1242  highroom = range-predicted;
1243  lowroom = predicted;
1244  if (highroom < lowroom) {
1245  room = highroom * 2;
1246  } else {
1247  room = lowroom * 2; // SPEC misspelling
1248  }
1249  if (val) {
1250  floor1_flag[low_neigh_offs] = 1;
1251  floor1_flag[high_neigh_offs] = 1;
1252  floor1_flag[i] = 1;
1253  if (val >= room) {
1254  if (highroom > lowroom) {
1255  floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1256  } else {
1257  floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1258  }
1259  } else {
1260  if (val & 1) {
1261  floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1262  } else {
1263  floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1264  }
1265  }
1266  } else {
1267  floor1_flag[i] = 0;
1268  floor1_Y_final[i] = av_clip_uint16(predicted);
1269  }
1270 
1271  av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1272  vf->list[i].x, floor1_Y_final[i], val);
1273  }
1274 
1275 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1276 
1277  ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1278 
1279  av_dlog(NULL, " Floor decoded\n");
1280 
1281  return 0;
1282 }
1283 
1284 // Read and decode residue
1285 
1287  vorbis_residue *vr,
1288  unsigned ch,
1289  uint8_t *do_not_decode,
1290  float *vec,
1291  unsigned vlen,
1292  unsigned ch_left,
1293  int vr_type)
1294 {
1295  GetBitContext *gb = &vc->gb;
1296  unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1297  unsigned ptns_to_read = vr->ptns_to_read;
1298  uint8_t *classifs = vr->classifs;
1299  unsigned pass, ch_used, i, j, k, l;
1300  unsigned max_output = (ch - 1) * vlen;
1301 
1302  if (vr_type == 2) {
1303  for (j = 1; j < ch; ++j)
1304  do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1305  if (do_not_decode[0])
1306  return 0;
1307  ch_used = 1;
1308  max_output += vr->end / ch;
1309  } else {
1310  ch_used = ch;
1311  max_output += vr->end;
1312  }
1313 
1314  if (max_output > ch_left * vlen) {
1315  av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1316  return -1;
1317  }
1318 
1319  av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1320 
1321  for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1322  uint16_t voffset, partition_count, j_times_ptns_to_read;
1323 
1324  voffset = vr->begin;
1325  for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1326  if (!pass) {
1327  unsigned inverse_class = ff_inverse[vr->classifications];
1328  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1329  if (!do_not_decode[j]) {
1330  unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1331  vc->codebooks[vr->classbook].nb_bits, 3);
1332 
1333  av_dlog(NULL, "Classword: %u\n", temp);
1334 
1335  assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1336  for (i = 0; i < c_p_c; ++i) {
1337  unsigned temp2;
1338 
1339  temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1340  if (partition_count + c_p_c - 1 - i < ptns_to_read)
1341  classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1342  temp = temp2;
1343  }
1344  }
1345  j_times_ptns_to_read += ptns_to_read;
1346  }
1347  }
1348  for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1349  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1350  unsigned voffs;
1351 
1352  if (!do_not_decode[j]) {
1353  unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1354  int vqbook = vr->books[vqclass][pass];
1355 
1356  if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1357  unsigned coffs;
1358  unsigned dim = vc->codebooks[vqbook].dimensions;
1359  unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1360  vorbis_codebook codebook = vc->codebooks[vqbook];
1361 
1362  if (vr_type == 0) {
1363 
1364  voffs = voffset+j*vlen;
1365  for (k = 0; k < step; ++k) {
1366  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1367  for (l = 0; l < dim; ++l)
1368  vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1369  }
1370  } else if (vr_type == 1) {
1371  voffs = voffset + j * vlen;
1372  for (k = 0; k < step; ++k) {
1373  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1374  for (l = 0; l < dim; ++l, ++voffs) {
1375  vec[voffs]+=codebook.codevectors[coffs+l];
1376 
1377  av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1378  pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1379  }
1380  }
1381  } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1382  voffs = voffset >> 1;
1383 
1384  if (dim == 2) {
1385  for (k = 0; k < step; ++k) {
1386  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1387  vec[voffs + k ] += codebook.codevectors[coffs ];
1388  vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1389  }
1390  } else if (dim == 4) {
1391  for (k = 0; k < step; ++k, voffs += 2) {
1392  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1393  vec[voffs ] += codebook.codevectors[coffs ];
1394  vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1395  vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1396  vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1397  }
1398  } else
1399  for (k = 0; k < step; ++k) {
1400  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1401  for (l = 0; l < dim; l += 2, voffs++) {
1402  vec[voffs ] += codebook.codevectors[coffs + l ];
1403  vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1404 
1405  av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1406  pass, voffset / ch + (voffs % ch) * vlen,
1407  vec[voffset / ch + (voffs % ch) * vlen],
1408  codebook.codevectors[coffs + l], coffs, l);
1409  }
1410  }
1411 
1412  } else if (vr_type == 2) {
1413  unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1414  unsigned voffs_mod = voffset - voffs_div * ch;
1415 
1416  for (k = 0; k < step; ++k) {
1417  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1418  for (l = 0; l < dim; ++l) {
1419  vec[voffs_div + voffs_mod * vlen] +=
1420  codebook.codevectors[coffs + l];
1421 
1422  av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1423  pass, voffs_div + voffs_mod * vlen,
1424  vec[voffs_div + voffs_mod * vlen],
1425  codebook.codevectors[coffs + l], coffs, l);
1426 
1427  if (++voffs_mod == ch) {
1428  voffs_div++;
1429  voffs_mod = 0;
1430  }
1431  }
1432  }
1433  }
1434  }
1435  }
1436  j_times_ptns_to_read += ptns_to_read;
1437  }
1438  ++partition_count;
1439  voffset += vr->partition_size;
1440  }
1441  }
1442  }
1443  return 0;
1444 }
1445 
1447  unsigned ch,
1448  uint8_t *do_not_decode,
1449  float *vec, unsigned vlen,
1450  unsigned ch_left)
1451 {
1452  if (vr->type == 2)
1453  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1454  else if (vr->type == 1)
1455  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1456  else if (vr->type == 0)
1457  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1458  else {
1459  av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1460  return AVERROR_INVALIDDATA;
1461  }
1462 }
1463 
1464 void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1465 {
1466  int i;
1467  for (i = 0; i < blocksize; i++) {
1468  if (mag[i] > 0.0) {
1469  if (ang[i] > 0.0) {
1470  ang[i] = mag[i] - ang[i];
1471  } else {
1472  float temp = ang[i];
1473  ang[i] = mag[i];
1474  mag[i] += temp;
1475  }
1476  } else {
1477  if (ang[i] > 0.0) {
1478  ang[i] += mag[i];
1479  } else {
1480  float temp = ang[i];
1481  ang[i] = mag[i];
1482  mag[i] -= temp;
1483  }
1484  }
1485  }
1486 }
1487 
1488 // Decode the audio packet using the functions above
1489 
1490 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1491 {
1492  GetBitContext *gb = &vc->gb;
1493  FFTContext *mdct;
1494  unsigned previous_window = vc->previous_window;
1495  unsigned mode_number, blockflag, blocksize;
1496  int i, j;
1497  uint8_t no_residue[255];
1498  uint8_t do_not_decode[255];
1499  vorbis_mapping *mapping;
1500  float *ch_res_ptr = vc->channel_residues;
1501  uint8_t res_chan[255];
1502  unsigned res_num = 0;
1503  int retlen = 0;
1504  unsigned ch_left = vc->audio_channels;
1505  unsigned vlen;
1506 
1507  if (get_bits1(gb)) {
1508  av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1509  return AVERROR_INVALIDDATA; // packet type not audio
1510  }
1511 
1512  if (vc->mode_count == 1) {
1513  mode_number = 0;
1514  } else {
1515  GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1516  }
1517  vc->mode_number = mode_number;
1518  mapping = &vc->mappings[vc->modes[mode_number].mapping];
1519 
1520  av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1521  vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1522 
1523  blockflag = vc->modes[mode_number].blockflag;
1524  blocksize = vc->blocksize[blockflag];
1525  vlen = blocksize / 2;
1526  if (blockflag) {
1527  previous_window = get_bits(gb, 1);
1528  skip_bits1(gb); // next_window
1529  }
1530 
1531  memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1532  for (i = 0; i < vc->audio_channels; ++i)
1533  memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1534 
1535 // Decode floor
1536 
1537  for (i = 0; i < vc->audio_channels; ++i) {
1538  vorbis_floor *floor;
1539  int ret;
1540  if (mapping->submaps > 1) {
1541  floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1542  } else {
1543  floor = &vc->floors[mapping->submap_floor[0]];
1544  }
1545 
1546  ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1547 
1548  if (ret < 0) {
1549  av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1550  return AVERROR_INVALIDDATA;
1551  }
1552  no_residue[i] = ret;
1553  }
1554 
1555 // Nonzero vector propagate
1556 
1557  for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1558  if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1559  no_residue[mapping->magnitude[i]] = 0;
1560  no_residue[mapping->angle[i]] = 0;
1561  }
1562  }
1563 
1564 // Decode residue
1565 
1566  for (i = 0; i < mapping->submaps; ++i) {
1567  vorbis_residue *residue;
1568  unsigned ch = 0;
1569  int ret;
1570 
1571  for (j = 0; j < vc->audio_channels; ++j) {
1572  if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1573  res_chan[j] = res_num;
1574  if (no_residue[j]) {
1575  do_not_decode[ch] = 1;
1576  } else {
1577  do_not_decode[ch] = 0;
1578  }
1579  ++ch;
1580  ++res_num;
1581  }
1582  }
1583  residue = &vc->residues[mapping->submap_residue[i]];
1584  if (ch_left < ch) {
1585  av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1586  return -1;
1587  }
1588  if (ch) {
1589  ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1590  if (ret < 0)
1591  return ret;
1592  }
1593 
1594  ch_res_ptr += ch * vlen;
1595  ch_left -= ch;
1596  }
1597 
1598  if (ch_left > 0)
1599  return AVERROR_INVALIDDATA;
1600 
1601 // Inverse coupling
1602 
1603  for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1604  float *mag, *ang;
1605 
1606  mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1607  ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1608  vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1609  }
1610 
1611 // Dotproduct, MDCT
1612 
1613  mdct = &vc->mdct[blockflag];
1614 
1615  for (j = vc->audio_channels-1;j >= 0; j--) {
1616  ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1617  vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1618  mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1619  }
1620 
1621 // Overlap/add, save data for next overlapping
1622 
1623  retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1624  for (j = 0; j < vc->audio_channels; j++) {
1625  unsigned bs0 = vc->blocksize[0];
1626  unsigned bs1 = vc->blocksize[1];
1627  float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1628  float *saved = vc->saved + j * bs1 / 4;
1629  float *ret = floor_ptr[j];
1630  float *buf = residue;
1631  const float *win = vc->win[blockflag & previous_window];
1632 
1633  if (blockflag == previous_window) {
1634  vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1635  } else if (blockflag > previous_window) {
1636  vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1637  memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1638  } else {
1639  memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1640  vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1641  }
1642  memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1643  }
1644 
1645  vc->previous_window = blockflag;
1646  return retlen;
1647 }
1648 
1649 // Return the decoded audio packet through the standard api
1650 
1651 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1652  int *got_frame_ptr, AVPacket *avpkt)
1653 {
1654  const uint8_t *buf = avpkt->data;
1655  int buf_size = avpkt->size;
1656  vorbis_context *vc = avccontext->priv_data;
1657  GetBitContext *gb = &vc->gb;
1658  float *channel_ptrs[255];
1659  int i, len, ret;
1660 
1661  av_dlog(NULL, "packet length %d \n", buf_size);
1662 
1663  /* get output buffer */
1664  vc->frame.nb_samples = vc->blocksize[1] / 2;
1665  if ((ret = ff_get_buffer(avccontext, &vc->frame)) < 0) {
1666  av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1667  return ret;
1668  }
1669 
1670  if (vc->audio_channels > 8) {
1671  for (i = 0; i < vc->audio_channels; i++)
1672  channel_ptrs[i] = (float *)vc->frame.extended_data[i];
1673  } else {
1674  for (i = 0; i < vc->audio_channels; i++) {
1675  int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1676  channel_ptrs[ch] = (float *)vc->frame.extended_data[i];
1677  }
1678  }
1679 
1680  init_get_bits(gb, buf, buf_size*8);
1681 
1682  if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1683  return len;
1684 
1685  if (!vc->first_frame) {
1686  vc->first_frame = 1;
1687  *got_frame_ptr = 0;
1688  return buf_size;
1689  }
1690 
1691  av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1692  get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1693 
1694  vc->frame.nb_samples = len;
1695  *got_frame_ptr = 1;
1696  *(AVFrame *)data = vc->frame;
1697 
1698  return buf_size;
1699 }
1700 
1701 // Close decoder
1702 
1704 {
1705  vorbis_context *vc = avccontext->priv_data;
1706 
1707  vorbis_free(vc);
1708 
1709  return 0;
1710 }
1711 
1713 {
1714  vorbis_context *vc = avccontext->priv_data;
1715 
1716  if (vc->saved) {
1717  memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1718  sizeof(*vc->saved));
1719  }
1720  vc->previous_window = 0;
1721 }
1722 
1724  .name = "vorbis",
1725  .type = AVMEDIA_TYPE_AUDIO,
1726  .id = AV_CODEC_ID_VORBIS,
1727  .priv_data_size = sizeof(vorbis_context),
1732  .capabilities = CODEC_CAP_DR1,
1733  .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1734  .channel_layouts = ff_vorbis_channel_layouts,
1735  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1737 };
void(* vector_fmul_window)(float *dst, const float *src0, const float *src1, const float *win, int len)
Definition: dsputil.h:358
static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
Definition: vorbisdec.c:981
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:61
struct vorbis_floor1_s vorbis_floor1
Definition: vorbisdec.c:59
av_cold void ff_dsputil_init(DSPContext *c, AVCodecContext *avctx)
Definition: dsputil.c:2656
uint16_t windowtype
Definition: vorbisdec.c:119
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n)
Definition: vorbis.c:35
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
Definition: vorbisdec.c:483
This structure describes decoded (raw) audio or video data.
Definition: avcodec.h:989
vorbis_residue * residues
Definition: vorbisdec.c:147
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:237
AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2725
void(* vorbis_inverse_coupling)(float *mag, float *ang, int blocksize)
Definition: dsputil.h:352
int size
Definition: avcodec.h:916
vorbis_floor * floors
Definition: vorbisdec.c:145
#define pass
Definition: fft.c:334
uint8_t audio_channels
Definition: vorbisdec.c:135
uint8_t dimensions
Definition: vorbisdec.c:49
GetBitContext gb
Definition: vorbisdec.c:127
unsigned partition_size
Definition: vorbisdec.c:98
av_dlog(ac->avr,"%d samples - audio_convert: %s to %s (%s)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic?ac->func_descr_generic:ac->func_descr)
uint32_t bitrate_maximum
Definition: vorbisdec.c:137
static const char idx_err_str[]
Definition: vorbisdec.c:163
#define ilog(i)
Definition: vorbis.h:48
AVCodec.
Definition: avcodec.h:2960
#define V_NB_BITS
Definition: vorbisdec.c:40
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:1286
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:151
static int decode(MimicContext *ctx, int quality, int num_coeffs, int is_iframe)
Definition: mimic.c:228
const uint32_t ff_inverse[257]
Definition: mathtables.c:23
uint8_t bits
Definition: crc.c:31
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2112
uint8_t
uint8_t mapping
Definition: vorbisdec.c:121
#define BARK(x)
Definition: vorbisdec.c:160
static int vorbis_floor0_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1051
FFTContext mdct[2]
Definition: vorbisdec.c:132
#define VALIDATE_INDEX(idx, limit)
Definition: vorbisdec.c:164
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1454
#define t0
Definition: regdef.h:28
const char data[16]
Definition: mxf.c:66
uint8_t * mux
Definition: vorbisdec.c:112
uint8_t * data
Definition: avcodec.h:915
uint32_t audio_samplerate
Definition: vorbisdec.c:136
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:192
unsigned int nb_bits
Definition: vorbisdec.c:54
uint8_t maxpass
Definition: vorbisdec.c:102
bitstream reader API header.
vorbis_mapping * mappings
Definition: vorbisdec.c:149
static float t
static int init(AVCodecParserContext *s)
Definition: h264_parser.c:335
float, planar
Definition: samplefmt.h:60
#define V_NB_BITS2
Definition: vorbisdec.c:41
int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)
Definition: vorbisdec.c:63
uint16_t codebook_count
Definition: vorbisdec.c:142
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:139
uint16_t transformtype
Definition: vorbisdec.c:120
uint8_t classbook
Definition: vorbisdec.c:100
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the product of two vectors of floats and store the result in a vector of floats...
Definition: float_dsp.h:36
uint8_t mode_number
Definition: vorbisdec.c:152
uint8_t residue_count
Definition: vorbisdec.c:146
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:88
uint16_t x
Definition: vorbis.h:33
static int vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1160
#define t1
Definition: regdef.h:29
uint16_t ptns_to_read
Definition: vorbisdec.c:103
int flags
CODEC_FLAG_*.
Definition: avcodec.h:1434
void av_log(void *avcl, int level, const char *fmt,...)
Definition: log.c:146
const char * name
Name of the codec implementation.
Definition: avcodec.h:2967
AVCodec ff_vorbis_decoder
Definition: vorbisdec.c:1723
#define ff_mdct_init
Definition: fft.h:146
DSPContext dsp
Definition: vorbisdec.c:128
uint8_t first_frame
Definition: vorbisdec.c:133
uint32_t bitrate_nominal
Definition: vorbisdec.c:138
Definition: get_bits.h:63
int off
Definition: dsputil_bfin.c:28
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2165
uint8_t floor_type
Definition: vorbisdec.c:65
union vorbis_floor_u vorbis_floor_data
Definition: vorbisdec.c:57
float * codevectors
Definition: vorbisdec.c:53
static int vorbis_parse_id_hdr(vorbis_context *vc)
Definition: vorbisdec.c:917
Definition: fft.h:62
#define V_MAX_VLCS
Definition: vorbisdec.c:42
#define GET_VALIDATED_INDEX(idx, bits, limit)
Definition: vorbisdec.c:171
union vorbis_floor::vorbis_floor_u data
static void vorbis_free(vorbis_context *vc)
Definition: vorbisdec.c:189
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame)
Get a buffer for a frame.
Definition: utils.c:464
int32_t
uint8_t blockflag
Definition: vorbisdec.c:118
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
Definition: vorbis.c:53
struct vorbis_floor0_s vorbis_floor0
Definition: vorbisdec.c:58
uint32_t bitrate_minimum
Definition: vorbisdec.c:139
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:515
#define L(x)
Definition: vp56_arith.h:36
AVCodecContext * avccontext
Definition: vorbisdec.c:125
uint8_t submap_floor[16]
Definition: vorbisdec.c:113
uint16_t coupling_steps
Definition: vorbisdec.c:109
uint8_t submap_residue[16]
Definition: vorbisdec.c:114
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
Definition: vorbisdec.c:666
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
Definition: vorbisdec.c:746
NULL
Definition: eval.c:52
vorbis_codebook * codebooks
Definition: vorbisdec.c:143
external API header
AV_SAMPLE_FMT_NONE
Definition: avconv_filter.c:63
int sample_rate
samples per second
Definition: avcodec.h:2104
uint16_t type
Definition: vorbisdec.c:95
main external API structure.
Definition: avcodec.h:1339
static void close(AVCodecParserContext *s)
Definition: h264_parser.c:326
#define FASTDIV(a, b)
Definition: mathops.h:195
const uint64_t ff_vorbis_channel_layouts[9]
Definition: vorbis_data.c:48
uint8_t * magnitude
Definition: vorbisdec.c:110
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:418
void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
Definition: vorbisdec.c:1464
uint8_t maxdepth
Definition: vorbisdec.c:51
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:82
uint8_t previous_window
Definition: vorbisdec.c:153
int extradata_size
Definition: avcodec.h:1455
uint8_t classifications
Definition: vorbisdec.c:99
#define INIT_VLC_LE
Definition: get_bits.h:432
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:268
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:293
static int vorbis_decode_frame(AVCodecContext *avccontext, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1651
void avcodec_get_frame_defaults(AVFrame *frame)
Set the fields of the given AVFrame to default values.
Definition: utils.c:602
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:260
AVFloatDSPContext fdsp
Definition: vorbisdec.c:129
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:372
uint32_t blocksize[2]
Definition: vorbisdec.c:140
static int vorbis_parse_setup_hdr(vorbis_context *vc)
Definition: vorbisdec.c:871
int avpriv_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, 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
int dim
vorbis_mode * modes
Definition: vorbisdec.c:151
static int step
Definition: avplay.c:252
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:301
uint8_t floor_count
Definition: vorbisdec.c:144
uint8_t mode_count
Definition: vorbisdec.c:150
static void create_map(vorbis_context *vc, unsigned floor_number)
Definition: vorbisdec.c:813
#define V_MAX_PARTITIONS
Definition: vorbisdec.c:43
const float *const ff_vorbis_vwin[8]
Definition: vorbis_data.c:2191
uint8_t mapping_count
Definition: vorbisdec.c:148
static float vorbisfloat2float(unsigned val)
Definition: vorbisdec.c:177
uint8_t * classifs
Definition: vorbisdec.c:104
common internal api header.
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
struct vorbis_context_s vorbis_context
#define ff_mdct_end
Definition: fft.h:147
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
Definition: alsdec.c:1772
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:1446
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:49
DSP utils.
vorbis_floor_decode_func decode
Definition: vorbisdec.c:66
uint32_t version
Definition: vorbisdec.c:134
void * priv_data
Definition: avcodec.h:1382
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
Definition: vorbisdec.c:457
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
Definition: vorbisdec.c:844
av_cold void ff_fmt_convert_init(FmtConvertContext *c, AVCodecContext *avctx)
Definition: fmtconvert.c:79
int len
uint8_t * angle
Definition: vorbisdec.c:111
int channels
number of audio channels
Definition: avcodec.h:2105
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:65
uint32_t end
Definition: vorbisdec.c:97
int16_t books[64][8]
Definition: vorbisdec.c:101
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:210
uint8_t lookup_type
Definition: vorbisdec.c:50
struct vorbis_floor::vorbis_floor_u::vorbis_floor0_s t0
FmtConvertContext fmt_conv
Definition: vorbisdec.c:130
void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)
Initialize a float DSP context.
Definition: float_dsp.c:55
uint32_t begin
Definition: vorbisdec.c:96
const uint8_t ff_vorbis_channel_layout_offsets[8][8]
Definition: vorbis_data.c:26
float * channel_residues
Definition: vorbisdec.c:154
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: avcodec.h:1028
Definition: vorbis.h:32
int ff_vorbis_ready_floor1_list(AVCodecContext *avccontext, vorbis_floor1_entry *list, int values)
Definition: vorbis.c:120
This structure stores compressed data.
Definition: avcodec.h:898
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
Definition: vorbisdec.c:234
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:322
const float * win[2]
Definition: vorbisdec.c:141
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
Definition: vorbisdec.c:1490
int nb_samples
number of audio samples (per channel) described by this frame
Definition: avcodec.h:1042
void * av_mallocz(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:158
static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
Definition: vorbisdec.c:1703
uint8_t submaps
Definition: vorbisdec.c:108
DSPContext.
Definition: dsputil.h:194
static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
Definition: vorbisdec.c:1712
if(!(ptr_align%ac->ptr_align)&&samples_align >=aligned_len)