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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 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
35 #include "avcodec.h"
36 #include "get_bits.h"
37 #include "fft.h"
38 #include "internal.h"
39 
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 book_idx;
1101  uint64_t amplitude;
1102  unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1103 
1104  if (!vf->amplitude_bits)
1105  return 1;
1106 
1107  amplitude = get_bits64(&vc->gb, vf->amplitude_bits);
1108  if (amplitude > 0) {
1109  float last = 0;
1110  unsigned idx, lsp_len = 0;
1111  vorbis_codebook codebook;
1112 
1113  book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1114  if (book_idx >= vf->num_books) {
1115  av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1116  book_idx = 0;
1117  }
1118  ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1119  codebook = vc->codebooks[vf->book_list[book_idx]];
1120  /* Invalid codebook! */
1121  if (!codebook.codevectors)
1122  return AVERROR_INVALIDDATA;
1123 
1124  while (lsp_len<vf->order) {
1125  int vec_off;
1126 
1127  ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1128  ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1129  /* read temp vector */
1130  vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1131  codebook.nb_bits, codebook.maxdepth);
1132  if (vec_off < 0)
1133  return AVERROR_INVALIDDATA;
1134  vec_off *= codebook.dimensions;
1135  ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1136  /* copy each vector component and add last to it */
1137  for (idx = 0; idx < codebook.dimensions; ++idx)
1138  lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1139  last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1140 
1141  lsp_len += codebook.dimensions;
1142  }
1143  /* DEBUG: output lsp coeffs */
1144  {
1145  int idx;
1146  for (idx = 0; idx < lsp_len; ++idx)
1147  ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1148  }
1149 
1150  /* synthesize floor output vector */
1151  {
1152  int i;
1153  int order = vf->order;
1154  float wstep = M_PI / vf->bark_map_size;
1155 
1156  for (i = 0; i < order; i++)
1157  lsp[i] = 2.0f * cos(lsp[i]);
1158 
1159  ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1160  vf->map_size[blockflag], order, wstep);
1161 
1162  i = 0;
1163  while (i < vf->map_size[blockflag]) {
1164  int j, iter_cond = vf->map[blockflag][i];
1165  float p = 0.5f;
1166  float q = 0.5f;
1167  float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1168 
1169  /* similar part for the q and p products */
1170  for (j = 0; j + 1 < order; j += 2) {
1171  q *= lsp[j] - two_cos_w;
1172  p *= lsp[j + 1] - two_cos_w;
1173  }
1174  if (j == order) { // even order
1175  p *= p * (2.0f - two_cos_w);
1176  q *= q * (2.0f + two_cos_w);
1177  } else { // odd order
1178  q *= two_cos_w-lsp[j]; // one more time for q
1179 
1180  /* final step and square */
1181  p *= p * (4.f - two_cos_w * two_cos_w);
1182  q *= q;
1183  }
1184 
1185  if (p + q == 0.0)
1186  return AVERROR_INVALIDDATA;
1187 
1188  /* calculate linear floor value */
1189  q = exp((((amplitude*vf->amplitude_offset) /
1190  (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q)))
1191  - vf->amplitude_offset) * .11512925f);
1192 
1193  /* fill vector */
1194  do {
1195  vec[i] = q; ++i;
1196  } while (vf->map[blockflag][i] == iter_cond);
1197  }
1198  }
1199  } else {
1200  /* this channel is unused */
1201  return 1;
1202  }
1203 
1204  ff_dlog(NULL, " Floor0 decoded\n");
1205 
1206  return 0;
1207 }
1208 
1210  vorbis_floor_data *vfu, float *vec)
1211 {
1212  vorbis_floor1 *vf = &vfu->t1;
1213  GetBitContext *gb = &vc->gb;
1214  uint16_t range_v[4] = { 256, 128, 86, 64 };
1215  unsigned range = range_v[vf->multiplier - 1];
1216  uint16_t floor1_Y[258];
1217  uint16_t floor1_Y_final[258];
1218  int floor1_flag[258];
1219  unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1220  int book, adx, ady, dy, off, predicted, err;
1221 
1222 
1223  if (!get_bits1(gb)) // silence
1224  return 1;
1225 
1226 // Read values (or differences) for the floor's points
1227 
1228  floor1_Y[0] = get_bits(gb, ilog(range - 1));
1229  floor1_Y[1] = get_bits(gb, ilog(range - 1));
1230 
1231  ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1232 
1233  offset = 2;
1234  for (i = 0; i < vf->partitions; ++i) {
1235  partition_class = vf->partition_class[i];
1236  cdim = vf->class_dimensions[partition_class];
1237  cbits = vf->class_subclasses[partition_class];
1238  csub = (1 << cbits) - 1;
1239  cval = 0;
1240 
1241  ff_dlog(NULL, "Cbits %u\n", cbits);
1242 
1243  if (cbits) // this reads all subclasses for this partition's class
1244  cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1245  vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1246 
1247  for (j = 0; j < cdim; ++j) {
1248  book = vf->subclass_books[partition_class][cval & csub];
1249 
1250  ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1251  book, cbits, cval, get_bits_count(gb));
1252 
1253  cval = cval >> cbits;
1254  if (book > -1) {
1255  int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1256  vc->codebooks[book].nb_bits, 3);
1257  if (v < 0)
1258  return AVERROR_INVALIDDATA;
1259  floor1_Y[offset+j] = v;
1260  } else {
1261  floor1_Y[offset+j] = 0;
1262  }
1263 
1264  ff_dlog(NULL, " floor(%d) = %d \n",
1265  vf->list[offset+j].x, floor1_Y[offset+j]);
1266  }
1267  offset+=cdim;
1268  }
1269 
1270 // Amplitude calculation from the differences
1271 
1272  floor1_flag[0] = 1;
1273  floor1_flag[1] = 1;
1274  floor1_Y_final[0] = floor1_Y[0];
1275  floor1_Y_final[1] = floor1_Y[1];
1276 
1277  for (i = 2; i < vf->x_list_dim; ++i) {
1278  unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1279 
1280  low_neigh_offs = vf->list[i].low;
1281  high_neigh_offs = vf->list[i].high;
1282  dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1283  adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1284  ady = FFABS(dy);
1285  err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1286  off = err / adx;
1287  if (dy < 0) {
1288  predicted = floor1_Y_final[low_neigh_offs] - off;
1289  } else {
1290  predicted = floor1_Y_final[low_neigh_offs] + off;
1291  } // render_point end
1292 
1293  val = floor1_Y[i];
1294  highroom = range-predicted;
1295  lowroom = predicted;
1296  if (highroom < lowroom) {
1297  room = highroom * 2;
1298  } else {
1299  room = lowroom * 2; // SPEC misspelling
1300  }
1301  if (val) {
1302  floor1_flag[low_neigh_offs] = 1;
1303  floor1_flag[high_neigh_offs] = 1;
1304  floor1_flag[i] = 1;
1305  if (val >= room) {
1306  if (highroom > lowroom) {
1307  floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1308  } else {
1309  floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1310  }
1311  } else {
1312  if (val & 1) {
1313  floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1314  } else {
1315  floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1316  }
1317  }
1318  } else {
1319  floor1_flag[i] = 0;
1320  floor1_Y_final[i] = av_clip_uint16(predicted);
1321  }
1322 
1323  ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1324  vf->list[i].x, floor1_Y_final[i], val);
1325  }
1326 
1327 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1328 
1329  ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1330 
1331  ff_dlog(NULL, " Floor decoded\n");
1332 
1333  return 0;
1334 }
1335 
1337  vorbis_residue *vr,
1338  uint8_t *do_not_decode,
1339  unsigned ch_used,
1340  int partition_count,
1341  int ptns_to_read
1342  )
1343 {
1344  vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1345  int p, j, i;
1346  unsigned c_p_c = codebook->dimensions;
1347  unsigned inverse_class = ff_inverse[vr->classifications];
1348  int temp, temp2;
1349  for (p = 0, j = 0; j < ch_used; ++j) {
1350  if (!do_not_decode[j]) {
1351  temp = get_vlc2(&vc->gb, codebook->vlc.table,
1352  codebook->nb_bits, 3);
1353 
1354  ff_dlog(NULL, "Classword: %u\n", temp);
1355 
1356  av_assert0(temp < 65536);
1357 
1358  if (temp < 0) {
1359  av_log(vc->avctx, AV_LOG_ERROR,
1360  "Invalid vlc code decoding %d channel.", j);
1361  return AVERROR_INVALIDDATA;
1362  }
1363 
1364  if (vr->classifications == 1) {
1365  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1366  if (i < ptns_to_read)
1367  vr->classifs[p + i] = 0;
1368  }
1369  } else {
1370  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1371  temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1372 
1373  if (i < ptns_to_read)
1374  vr->classifs[p + i] = temp - temp2 * vr->classifications;
1375  temp = temp2;
1376  }
1377  }
1378  }
1379  p += ptns_to_read;
1380  }
1381  return 0;
1382 }
1383 // Read and decode residue
1384 
1386  vorbis_residue *vr,
1387  unsigned ch,
1388  uint8_t *do_not_decode,
1389  float *vec,
1390  unsigned vlen,
1391  unsigned ch_left,
1392  int vr_type)
1393 {
1394  GetBitContext *gb = &vc->gb;
1395  unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1396  uint8_t *classifs = vr->classifs;
1397  unsigned pass, ch_used, i, j, k, l;
1398  unsigned max_output = (ch - 1) * vlen;
1399  int ptns_to_read = vr->ptns_to_read;
1400  int libvorbis_bug = 0;
1401 
1402  if (vr_type == 2) {
1403  for (j = 1; j < ch; ++j)
1404  do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1405  if (do_not_decode[0])
1406  return 0;
1407  ch_used = 1;
1408  max_output += vr->end / ch;
1409  } else {
1410  ch_used = ch;
1411  max_output += vr->end;
1412  }
1413 
1414  if (max_output > ch_left * vlen) {
1415  if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1416  ptns_to_read--;
1417  libvorbis_bug = 1;
1418  } else {
1419  av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1420  return AVERROR_INVALIDDATA;
1421  }
1422  }
1423 
1424  ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1425 
1426  for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1427  int voffset, partition_count, j_times_ptns_to_read;
1428 
1429  voffset = vr->begin;
1430  for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1431  if (!pass) {
1432  int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1433  if (ret < 0)
1434  return ret;
1435  }
1436  for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1437  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1438  unsigned voffs;
1439 
1440  if (!do_not_decode[j]) {
1441  unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1442  int vqbook = vr->books[vqclass][pass];
1443 
1444  if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1445  int coffs;
1446  unsigned dim = vc->codebooks[vqbook].dimensions;
1447  unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1448  vorbis_codebook codebook = vc->codebooks[vqbook];
1449 
1450  if (vr_type == 0) {
1451 
1452  voffs = voffset+j*vlen;
1453  for (k = 0; k < step; ++k) {
1454  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1455  if (coffs < 0)
1456  return coffs;
1457  coffs *= dim;
1458  for (l = 0; l < dim; ++l)
1459  vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1460  }
1461  } else if (vr_type == 1) {
1462  voffs = voffset + j * vlen;
1463  for (k = 0; k < step; ++k) {
1464  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1465  if (coffs < 0)
1466  return coffs;
1467  coffs *= dim;
1468  for (l = 0; l < dim; ++l, ++voffs) {
1469  vec[voffs]+=codebook.codevectors[coffs+l];
1470 
1471  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1472  pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1473  }
1474  }
1475  } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1476  voffs = voffset >> 1;
1477 
1478  if (dim == 2) {
1479  for (k = 0; k < step; ++k) {
1480  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1481  if (coffs < 0)
1482  return coffs;
1483  coffs *= 2;
1484  vec[voffs + k ] += codebook.codevectors[coffs ];
1485  vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1486  }
1487  } else if (dim == 4) {
1488  for (k = 0; k < step; ++k, voffs += 2) {
1489  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1490  if (coffs < 0)
1491  return coffs;
1492  coffs *= 4;
1493  vec[voffs ] += codebook.codevectors[coffs ];
1494  vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1495  vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1496  vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1497  }
1498  } else
1499  for (k = 0; k < step; ++k) {
1500  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1501  if (coffs < 0)
1502  return coffs;
1503  coffs *= dim;
1504  for (l = 0; l < dim; l += 2, voffs++) {
1505  vec[voffs ] += codebook.codevectors[coffs + l ];
1506  vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1507 
1508  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1509  pass, voffset / ch + (voffs % ch) * vlen,
1510  vec[voffset / ch + (voffs % ch) * vlen],
1511  codebook.codevectors[coffs + l], coffs, l);
1512  }
1513  }
1514 
1515  } else if (vr_type == 2) {
1516  unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1517  unsigned voffs_mod = voffset - voffs_div * ch;
1518 
1519  for (k = 0; k < step; ++k) {
1520  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1521  if (coffs < 0)
1522  return coffs;
1523  coffs *= dim;
1524  for (l = 0; l < dim; ++l) {
1525  vec[voffs_div + voffs_mod * vlen] +=
1526  codebook.codevectors[coffs + l];
1527 
1528  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1529  pass, voffs_div + voffs_mod * vlen,
1530  vec[voffs_div + voffs_mod * vlen],
1531  codebook.codevectors[coffs + l], coffs, l);
1532 
1533  if (++voffs_mod == ch) {
1534  voffs_div++;
1535  voffs_mod = 0;
1536  }
1537  }
1538  }
1539  }
1540  }
1541  }
1542  j_times_ptns_to_read += ptns_to_read;
1543  }
1544  ++partition_count;
1545  voffset += vr->partition_size;
1546  }
1547  }
1548  if (libvorbis_bug && !pass) {
1549  for (j = 0; j < ch_used; ++j) {
1550  if (!do_not_decode[j]) {
1551  get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1552  vc->codebooks[vr->classbook].nb_bits, 3);
1553  }
1554  }
1555  }
1556  }
1557  return 0;
1558 }
1559 
1561  unsigned ch,
1562  uint8_t *do_not_decode,
1563  float *vec, unsigned vlen,
1564  unsigned ch_left)
1565 {
1566  if (vr->type == 2)
1567  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1568  else if (vr->type == 1)
1569  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1570  else if (vr->type == 0)
1571  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1572  else {
1573  av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1574  return AVERROR_INVALIDDATA;
1575  }
1576 }
1577 
1578 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1579 {
1580  int i;
1581  for (i = 0; i < blocksize; i++) {
1582  if (mag[i] > 0.0) {
1583  if (ang[i] > 0.0) {
1584  ang[i] = mag[i] - ang[i];
1585  } else {
1586  float temp = ang[i];
1587  ang[i] = mag[i];
1588  mag[i] += temp;
1589  }
1590  } else {
1591  if (ang[i] > 0.0) {
1592  ang[i] += mag[i];
1593  } else {
1594  float temp = ang[i];
1595  ang[i] = mag[i];
1596  mag[i] -= temp;
1597  }
1598  }
1599  }
1600 }
1601 
1602 // Decode the audio packet using the functions above
1603 
1604 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1605 {
1606  GetBitContext *gb = &vc->gb;
1607  FFTContext *mdct;
1608  int previous_window = vc->previous_window;
1609  unsigned mode_number, blockflag, blocksize;
1610  int i, j;
1611  uint8_t no_residue[255];
1612  uint8_t do_not_decode[255];
1613  vorbis_mapping *mapping;
1614  float *ch_res_ptr = vc->channel_residues;
1615  uint8_t res_chan[255];
1616  unsigned res_num = 0;
1617  int retlen = 0;
1618  unsigned ch_left = vc->audio_channels;
1619  unsigned vlen;
1620 
1621  if (get_bits1(gb)) {
1622  av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1623  return AVERROR_INVALIDDATA; // packet type not audio
1624  }
1625 
1626  if (vc->mode_count == 1) {
1627  mode_number = 0;
1628  } else {
1629  GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1630  }
1631  vc->mode_number = mode_number;
1632  mapping = &vc->mappings[vc->modes[mode_number].mapping];
1633 
1634  ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1635  vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1636 
1637  blockflag = vc->modes[mode_number].blockflag;
1638  blocksize = vc->blocksize[blockflag];
1639  vlen = blocksize / 2;
1640  if (blockflag) {
1641  int code = get_bits(gb, 2);
1642  if (previous_window < 0)
1643  previous_window = code>>1;
1644  } else if (previous_window < 0)
1645  previous_window = 0;
1646 
1647  memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1648  for (i = 0; i < vc->audio_channels; ++i)
1649  memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1650 
1651 // Decode floor
1652 
1653  for (i = 0; i < vc->audio_channels; ++i) {
1654  vorbis_floor *floor;
1655  int ret;
1656  if (mapping->submaps > 1) {
1657  floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1658  } else {
1659  floor = &vc->floors[mapping->submap_floor[0]];
1660  }
1661 
1662  ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1663 
1664  if (ret < 0) {
1665  av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1666  return AVERROR_INVALIDDATA;
1667  }
1668  no_residue[i] = ret;
1669  }
1670 
1671 // Nonzero vector propagate
1672 
1673  for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1674  if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1675  no_residue[mapping->magnitude[i]] = 0;
1676  no_residue[mapping->angle[i]] = 0;
1677  }
1678  }
1679 
1680 // Decode residue
1681 
1682  for (i = 0; i < mapping->submaps; ++i) {
1683  vorbis_residue *residue;
1684  unsigned ch = 0;
1685  int ret;
1686 
1687  for (j = 0; j < vc->audio_channels; ++j) {
1688  if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1689  res_chan[j] = res_num;
1690  if (no_residue[j]) {
1691  do_not_decode[ch] = 1;
1692  } else {
1693  do_not_decode[ch] = 0;
1694  }
1695  ++ch;
1696  ++res_num;
1697  }
1698  }
1699  residue = &vc->residues[mapping->submap_residue[i]];
1700  if (ch_left < ch) {
1701  av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1702  return AVERROR_INVALIDDATA;
1703  }
1704  if (ch) {
1705  ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1706  if (ret < 0)
1707  return ret;
1708  }
1709 
1710  ch_res_ptr += ch * vlen;
1711  ch_left -= ch;
1712  }
1713 
1714  if (ch_left > 0)
1715  return AVERROR_INVALIDDATA;
1716 
1717 // Inverse coupling
1718 
1719  for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1720  float *mag, *ang;
1721 
1722  mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1723  ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1724  vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1725  }
1726 
1727 // Dotproduct, MDCT
1728 
1729  mdct = &vc->mdct[blockflag];
1730 
1731  for (j = vc->audio_channels-1;j >= 0; j--) {
1732  ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1733  vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1734  mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1735  }
1736 
1737 // Overlap/add, save data for next overlapping
1738 
1739  retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1740  for (j = 0; j < vc->audio_channels; j++) {
1741  unsigned bs0 = vc->blocksize[0];
1742  unsigned bs1 = vc->blocksize[1];
1743  float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1744  float *saved = vc->saved + j * bs1 / 4;
1745  float *ret = floor_ptr[j];
1746  float *buf = residue;
1747  const float *win = vc->win[blockflag & previous_window];
1748 
1749  if (blockflag == previous_window) {
1750  vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1751  } else if (blockflag > previous_window) {
1752  vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1753  memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1754  } else {
1755  memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1756  vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1757  }
1758  memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1759  }
1760 
1761  vc->previous_window = blockflag;
1762  return retlen;
1763 }
1764 
1765 // Return the decoded audio packet through the standard api
1766 
1767 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1768  int *got_frame_ptr, AVPacket *avpkt)
1769 {
1770  const uint8_t *buf = avpkt->data;
1771  int buf_size = avpkt->size;
1772  vorbis_context *vc = avctx->priv_data;
1773  AVFrame *frame = data;
1774  GetBitContext *gb = &vc->gb;
1775  float *channel_ptrs[255];
1776  int i, len, ret;
1777 
1778  ff_dlog(NULL, "packet length %d \n", buf_size);
1779 
1780  if (*buf == 1 && buf_size > 7) {
1781  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1782  return ret;
1783 
1784  vorbis_free(vc);
1785  if ((ret = vorbis_parse_id_hdr(vc))) {
1786  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1787  vorbis_free(vc);
1788  return ret;
1789  }
1790 
1791  if (vc->audio_channels > 8)
1792  avctx->channel_layout = 0;
1793  else
1795 
1796  avctx->channels = vc->audio_channels;
1797  avctx->sample_rate = vc->audio_samplerate;
1798  return buf_size;
1799  }
1800 
1801  if (*buf == 3 && buf_size > 7) {
1802  av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1803  return buf_size;
1804  }
1805 
1806  if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1807  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1808  return ret;
1809 
1810  if ((ret = vorbis_parse_setup_hdr(vc))) {
1811  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1812  vorbis_free(vc);
1813  return ret;
1814  }
1815  return buf_size;
1816  }
1817 
1818  if (!vc->channel_residues || !vc->modes) {
1819  av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1820  return AVERROR_INVALIDDATA;
1821  }
1822 
1823  /* get output buffer */
1824  frame->nb_samples = vc->blocksize[1] / 2;
1825  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1826  return ret;
1827 
1828  if (vc->audio_channels > 8) {
1829  for (i = 0; i < vc->audio_channels; i++)
1830  channel_ptrs[i] = (float *)frame->extended_data[i];
1831  } else {
1832  for (i = 0; i < vc->audio_channels; i++) {
1833  int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1834  channel_ptrs[ch] = (float *)frame->extended_data[i];
1835  }
1836  }
1837 
1838  if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1839  return ret;
1840 
1841  if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1842  return len;
1843 
1844  if (!vc->first_frame) {
1845  vc->first_frame = 1;
1846  *got_frame_ptr = 0;
1847  av_frame_unref(frame);
1848  return buf_size;
1849  }
1850 
1851  ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1852  get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1853 
1854  frame->nb_samples = len;
1855  *got_frame_ptr = 1;
1856 
1857  return buf_size;
1858 }
1859 
1860 // Close decoder
1861 
1863 {
1864  vorbis_context *vc = avctx->priv_data;
1865 
1866  vorbis_free(vc);
1867 
1868  return 0;
1869 }
1870 
1872 {
1873  vorbis_context *vc = avctx->priv_data;
1874 
1875  if (vc->saved) {
1876  memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1877  sizeof(*vc->saved));
1878  }
1879  vc->previous_window = -1;
1880  vc->first_frame = 0;
1881 }
1882 
1884  .name = "vorbis",
1885  .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1886  .type = AVMEDIA_TYPE_AUDIO,
1887  .id = AV_CODEC_ID_VORBIS,
1888  .priv_data_size = sizeof(vorbis_context),
1890  .close = vorbis_decode_close,
1893  .capabilities = AV_CODEC_CAP_DR1,
1894  .channel_layouts = ff_vorbis_channel_layouts,
1895  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1897 };
float, planar
Definition: samplefmt.h:70
vorbis_codebook * codebooks
Definition: vorbisdec.c:142
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:634
struct vorbis_floor1_s vorbis_floor1
Definition: vorbisdec.c:60
float v
#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:39
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:171
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:1578
uint32_t version
Definition: vorbisdec.c:133
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:261
else temp
Definition: vf_mcdeint.c:257
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
Definition: vorbisdec.c:1862
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:1434
uint8_t dimensions
Definition: vorbisdec.c:50
unsigned partition_size
Definition: vorbisdec.c:99
AVCodecContext * avctx
Definition: vorbisdec.c:126
static const char idx_err_str[]
Definition: vorbisdec.c:162
#define ilog(i)
Definition: vorbis.h:48
AVCodec.
Definition: avcodec.h:3482
#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:1385
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:295
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2280
uint8_t
VorbisDSPContext dsp
Definition: vorbisdec.c:128
#define av_cold
Definition: attributes.h:74
#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:1627
static AVFrame * frame
uint8_t * mux
Definition: vorbisdec.c:113
uint8_t * data
Definition: avcodec.h:1433
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:213
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
int flag
Definition: checkasm.c:76
#define V_NB_BITS2
Definition: vorbisdec.c:45
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:358
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
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:178
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:1209
uint16_t ptns_to_read
Definition: vorbisdec.c:104
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1607
simple assert() macros that are a bit more flexible than ISO C assert().
const char * name
Name of the codec implementation.
Definition: avcodec.h:3489
AVCodec ff_vorbis_decoder
Definition: vorbisdec.c:1883
#define ff_mdct_init
Definition: fft.h:167
static const uint8_t offset[127][2]
Definition: vf_spp.c:92
float * saved
Definition: vorbisdec.c:154
Libavcodec external API header.
Definition: get_bits.h:64
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2333
#define pass
Definition: fft_template.c:509
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:788
#define FFMIN(a, b)
Definition: common.h:92
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:57
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:68
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:561
int n
Definition: avisynth_c.h:547
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
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:1336
AVFloatDSPContext * fdsp
Definition: vorbisdec.c:129
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:59
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1767
int sample_rate
samples per second
Definition: avcodec.h:2272
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:446
uint16_t type
Definition: vorbisdec.c:96
uint8_t audio_channels
Definition: vorbisdec.c:134
main external API structure.
Definition: avcodec.h:1512
#define FASTDIV(a, b)
Definition: mathops.h:210
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:1048
#define init_vlc(vlc, nb_bits, nb_codes,bits, bits_wrap, bits_size,codes, codes_wrap, codes_size,flags)
Definition: get_bits.h:462
uint8_t maxdepth
Definition: vorbisdec.c:52
void * buf
Definition: avisynth_c.h:553
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:108
int extradata_size
Definition: avcodec.h:1628
uint8_t classifications
Definition: vorbisdec.c:100
#define INIT_VLC_LE
Definition: get_bits.h:478
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:305
vorbis_mapping * mappings
Definition: vorbisdec.c:148
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:298
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:415
static int vorbis_parse_setup_hdr(vorbis_context *vc)
Definition: vorbisdec.c:914
int dim
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:143
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:338
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:465
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:521
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:280
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
#define ff_mdct_end
Definition: fft.h:168
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:1560
GetBitContext gb
Definition: vorbisdec.c:127
vorbis_floor_decode_func decode
Definition: vorbisdec.c:67
void * priv_data
Definition: avcodec.h:1554
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:2273
VLC_TYPE(* table)[2]
code, bits
Definition: get_bits.h:66
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:219
uint8_t lookup_type
Definition: vorbisdec.c:51
static void * av_mallocz_array(size_t nmemb, size_t size)
Definition: mem.h:228
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:37
#define M_PI
Definition: mathematics.h:46
#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:215
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
Definition: vorbisdec.c:1871
Definition: vorbis.h:32
This structure stores compressed data.
Definition: avcodec.h:1410
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
Definition: vorbisdec.c:238
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:364
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
Definition: vorbisdec.c:1604
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:225
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:252
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:857
uint8_t submaps
Definition: vorbisdec.c:109
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, vorbis_floor1_entry *list, int values)
Definition: vorbis.c:129