FFmpeg  4.3.8
vorbisdec.c
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1 /**
2  * @file
3  * Vorbis I decoder
4  * @author Denes Balatoni ( dbalatoni programozo hu )
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 /**
24  * @file
25  * Vorbis I decoder
26  * @author Denes Balatoni ( dbalatoni programozo hu )
27  */
28 
29 #include <inttypes.h>
30 #include <math.h>
31 
32 #include "libavutil/avassert.h"
33 #include "libavutil/float_dsp.h"
34 
35 #define BITSTREAM_READER_LE
36 #include "avcodec.h"
37 #include "fft.h"
38 #include "get_bits.h"
39 #include "internal.h"
40 #include "vorbis.h"
41 #include "vorbisdsp.h"
42 #include "xiph.h"
43 
44 #define V_NB_BITS 8
45 #define V_NB_BITS2 11
46 #define V_MAX_VLCS (1 << 16)
47 #define V_MAX_PARTITIONS (1 << 20)
48 
49 typedef struct vorbis_codebook {
54  float *codevectors;
55  unsigned int nb_bits;
57 
58 typedef union vorbis_floor_u vorbis_floor_data;
59 typedef struct vorbis_floor0_s vorbis_floor0;
60 typedef struct vorbis_floor1_s vorbis_floor1;
61 struct vorbis_context_s;
62 typedef
64  (struct vorbis_context_s *, vorbis_floor_data *, float *);
65 typedef struct vorbis_floor {
69  struct vorbis_floor0_s {
71  uint16_t rate;
72  uint16_t bark_map_size;
73  int32_t *map[2];
74  uint32_t map_size[2];
79  float *lsp;
80  } t0;
81  struct vorbis_floor1_s {
83  uint8_t partition_class[32];
84  uint8_t class_dimensions[16];
85  uint8_t class_subclasses[16];
86  uint8_t class_masterbook[16];
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;
114  uint8_t submap_floor[16];
115  uint8_t submap_residue[16];
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  if (!isfinite(codebook_minimum_value) || !isfinite(codebook_delta_value)) {
367  ret = AVERROR_INVALIDDATA;
368  goto error;
369  }
370  ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
371  codebook_lookup_values);
372  ff_dlog(NULL, " delta %f minmum %f \n",
373  codebook_delta_value, codebook_minimum_value);
374 
375  for (i = 0; i < codebook_lookup_values; ++i) {
376  codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
377 
378  ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
379  (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
380  ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
381  }
382 
383 // Weed out unused vlcs and build codevector vector
384  if (used_entries) {
385  codebook_setup->codevectors =
386  av_mallocz_array(used_entries, codebook_setup->dimensions *
387  sizeof(*codebook_setup->codevectors));
388  if (!codebook_setup->codevectors) {
389  ret = AVERROR(ENOMEM);
390  goto error;
391  }
392  } else
393  codebook_setup->codevectors = NULL;
394 
395  for (j = 0, i = 0; i < entries; ++i) {
396  unsigned dim = codebook_setup->dimensions;
397 
398  if (tmp_vlc_bits[i]) {
399  float last = 0.0;
400  unsigned lookup_offset = i;
401 
402  ff_dlog(vc->avctx, "Lookup offset %u ,", i);
403 
404  for (k = 0; k < dim; ++k) {
405  unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
406  codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
407  if (codebook_sequence_p)
408  last = codebook_setup->codevectors[j * dim + k];
409  lookup_offset/=codebook_lookup_values;
410  }
411  tmp_vlc_bits[j] = tmp_vlc_bits[i];
412 
413  ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
414  for (k = 0; k < dim; ++k)
415  ff_dlog(vc->avctx, " %f ",
416  codebook_setup->codevectors[j * dim + k]);
417  ff_dlog(vc->avctx, "\n");
418 
419  ++j;
420  }
421  }
422  if (j != used_entries) {
423  av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
424  ret = AVERROR_INVALIDDATA;
425  goto error;
426  }
427  entries = used_entries;
428  } else if (codebook_setup->lookup_type >= 2) {
429  av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
430  ret = AVERROR_INVALIDDATA;
431  goto error;
432  }
433 
434 // Initialize VLC table
435  if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
436  av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
437  ret = AVERROR_INVALIDDATA;
438  goto error;
439  }
440  codebook_setup->maxdepth = 0;
441  for (t = 0; t < entries; ++t)
442  if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
443  codebook_setup->maxdepth = tmp_vlc_bits[t];
444 
445  if (codebook_setup->maxdepth > 3 * V_NB_BITS)
446  codebook_setup->nb_bits = V_NB_BITS2;
447  else
448  codebook_setup->nb_bits = V_NB_BITS;
449 
450  codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
451 
452  if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
453  entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
454  sizeof(*tmp_vlc_bits), tmp_vlc_codes,
455  sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
456  INIT_VLC_LE))) {
457  av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
458  goto error;
459  }
460  }
461 
462  av_free(tmp_vlc_bits);
463  av_free(tmp_vlc_codes);
464  av_free(codebook_multiplicands);
465  return 0;
466 
467 // Error:
468 error:
469  av_free(tmp_vlc_bits);
470  av_free(tmp_vlc_codes);
471  av_free(codebook_multiplicands);
472  return ret;
473 }
474 
475 // Process time domain transforms part (unused in Vorbis I)
476 
478 {
479  GetBitContext *gb = &vc->gb;
480  unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
481 
482  for (i = 0; i < vorbis_time_count; ++i) {
483  unsigned vorbis_tdtransform = get_bits(gb, 16);
484 
485  ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
486  vorbis_time_count, vorbis_tdtransform);
487 
488  if (vorbis_tdtransform) {
489  av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
490  return AVERROR_INVALIDDATA;
491  }
492  }
493  return 0;
494 }
495 
496 // Process floors part
497 
498 static int vorbis_floor0_decode(vorbis_context *vc,
499  vorbis_floor_data *vfu, float *vec);
500 static int create_map(vorbis_context *vc, unsigned floor_number);
501 static int vorbis_floor1_decode(vorbis_context *vc,
502  vorbis_floor_data *vfu, float *vec);
504 {
505  GetBitContext *gb = &vc->gb;
506  int i, j, k, ret;
507 
508  vc->floor_count = get_bits(gb, 6) + 1;
509 
510  vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
511  if (!vc->floors)
512  return AVERROR(ENOMEM);
513 
514  for (i = 0; i < vc->floor_count; ++i) {
515  vorbis_floor *floor_setup = &vc->floors[i];
516 
517  floor_setup->floor_type = get_bits(gb, 16);
518 
519  ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
520 
521  if (floor_setup->floor_type == 1) {
522  int maximum_class = -1;
523  unsigned rangebits, rangemax, floor1_values = 2;
524 
525  floor_setup->decode = vorbis_floor1_decode;
526 
527  floor_setup->data.t1.partitions = get_bits(gb, 5);
528 
529  ff_dlog(NULL, " %d.floor: %d partitions \n",
530  i, floor_setup->data.t1.partitions);
531 
532  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
533  floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
534  if (floor_setup->data.t1.partition_class[j] > maximum_class)
535  maximum_class = floor_setup->data.t1.partition_class[j];
536 
537  ff_dlog(NULL, " %d. floor %d partition class %d \n",
538  i, j, floor_setup->data.t1.partition_class[j]);
539 
540  }
541 
542  ff_dlog(NULL, " maximum class %d \n", maximum_class);
543 
544  for (j = 0; j <= maximum_class; ++j) {
545  floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
546  floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
547 
548  ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
549  floor_setup->data.t1.class_dimensions[j],
550  floor_setup->data.t1.class_subclasses[j]);
551 
552  if (floor_setup->data.t1.class_subclasses[j]) {
554 
555  ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
556  }
557 
558  for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
559  int16_t bits = get_bits(gb, 8) - 1;
560  if (bits != -1)
561  VALIDATE_INDEX(bits, vc->codebook_count)
562  floor_setup->data.t1.subclass_books[j][k] = bits;
563 
564  ff_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
565  }
566  }
567 
568  floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
569  floor_setup->data.t1.x_list_dim = 2;
570 
571  for (j = 0; j < floor_setup->data.t1.partitions; ++j)
572  floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
573 
574  floor_setup->data.t1.list = av_mallocz_array(floor_setup->data.t1.x_list_dim,
575  sizeof(*floor_setup->data.t1.list));
576  if (!floor_setup->data.t1.list)
577  return AVERROR(ENOMEM);
578 
579  rangebits = get_bits(gb, 4);
580  if (!rangebits && floor_setup->data.t1.partitions) {
582  "A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
583  return AVERROR_INVALIDDATA;
584  }
585  rangemax = (1 << rangebits);
586  if (rangemax > vc->blocksize[1] / 2) {
588  "Floor value is too large for blocksize: %u (%"PRIu32")\n",
589  rangemax, vc->blocksize[1] / 2);
590  return AVERROR_INVALIDDATA;
591  }
592  floor_setup->data.t1.list[0].x = 0;
593  floor_setup->data.t1.list[1].x = rangemax;
594 
595  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
596  for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
597  floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
598 
599  ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
600  floor_setup->data.t1.list[floor1_values].x);
601  }
602  }
603 
604 // Precalculate order of x coordinates - needed for decode
606  floor_setup->data.t1.list,
607  floor_setup->data.t1.x_list_dim)) {
608  return AVERROR_INVALIDDATA;
609  }
610  } else if (floor_setup->floor_type == 0) {
611  unsigned max_codebook_dim = 0;
612 
613  floor_setup->decode = vorbis_floor0_decode;
614 
615  floor_setup->data.t0.order = get_bits(gb, 8);
616  if (!floor_setup->data.t0.order) {
617  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
618  return AVERROR_INVALIDDATA;
619  }
620  floor_setup->data.t0.rate = get_bits(gb, 16);
621  if (!floor_setup->data.t0.rate) {
622  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
623  return AVERROR_INVALIDDATA;
624  }
625  floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
626  if (!floor_setup->data.t0.bark_map_size) {
628  "Floor 0 bark map size is 0.\n");
629  return AVERROR_INVALIDDATA;
630  }
631  floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
632  floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
633  floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
634 
635  /* allocate mem for booklist */
636  floor_setup->data.t0.book_list =
637  av_malloc(floor_setup->data.t0.num_books);
638  if (!floor_setup->data.t0.book_list)
639  return AVERROR(ENOMEM);
640  /* read book indexes */
641  {
642  int idx;
643  unsigned book_idx;
644  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
645  GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
646  floor_setup->data.t0.book_list[idx] = book_idx;
647  if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
648  max_codebook_dim = vc->codebooks[book_idx].dimensions;
649  }
650  }
651 
652  if ((ret = create_map(vc, i)) < 0)
653  return ret;
654 
655  /* codebook dim is for padding if codebook dim doesn't *
656  * divide order+1 then we need to read more data */
657  floor_setup->data.t0.lsp =
658  av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
659  sizeof(*floor_setup->data.t0.lsp));
660  if (!floor_setup->data.t0.lsp)
661  return AVERROR(ENOMEM);
662 
663  /* debug output parsed headers */
664  ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
665  ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
666  ff_dlog(NULL, "floor0 bark map size: %u\n",
667  floor_setup->data.t0.bark_map_size);
668  ff_dlog(NULL, "floor0 amplitude bits: %u\n",
669  floor_setup->data.t0.amplitude_bits);
670  ff_dlog(NULL, "floor0 amplitude offset: %u\n",
671  floor_setup->data.t0.amplitude_offset);
672  ff_dlog(NULL, "floor0 number of books: %u\n",
673  floor_setup->data.t0.num_books);
674  ff_dlog(NULL, "floor0 book list pointer: %p\n",
675  floor_setup->data.t0.book_list);
676  {
677  int idx;
678  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
679  ff_dlog(NULL, " Book %d: %u\n", idx + 1,
680  floor_setup->data.t0.book_list[idx]);
681  }
682  }
683  } else {
684  av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
685  return AVERROR_INVALIDDATA;
686  }
687  }
688  return 0;
689 }
690 
691 // Process residues part
692 
694 {
695  GetBitContext *gb = &vc->gb;
696  unsigned i, j, k;
697 
698  vc->residue_count = get_bits(gb, 6)+1;
699  vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
700  if (!vc->residues)
701  return AVERROR(ENOMEM);
702 
703  ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
704 
705  for (i = 0; i < vc->residue_count; ++i) {
706  vorbis_residue *res_setup = &vc->residues[i];
707  uint8_t cascade[64];
708  unsigned high_bits, low_bits;
709 
710  res_setup->type = get_bits(gb, 16);
711 
712  ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
713 
714  res_setup->begin = get_bits(gb, 24);
715  res_setup->end = get_bits(gb, 24);
716  res_setup->partition_size = get_bits(gb, 24) + 1;
717  /* Validations to prevent a buffer overflow later. */
718  if (res_setup->begin>res_setup->end ||
719  (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
721  "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
722  res_setup->type, res_setup->begin, res_setup->end,
723  res_setup->partition_size, vc->blocksize[1] / 2);
724  return AVERROR_INVALIDDATA;
725  }
726 
727  res_setup->classifications = get_bits(gb, 6) + 1;
728  GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
729 
730  res_setup->ptns_to_read =
731  (res_setup->end - res_setup->begin) / res_setup->partition_size;
732  res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
733  vc->audio_channels *
734  sizeof(*res_setup->classifs));
735  if (!res_setup->classifs)
736  return AVERROR(ENOMEM);
737 
738  ff_dlog(NULL, " begin %"PRIu32" end %"PRIu32" part.size %u classif.s %"PRIu8" classbook %"PRIu8"\n",
739  res_setup->begin, res_setup->end, res_setup->partition_size,
740  res_setup->classifications, res_setup->classbook);
741 
742  for (j = 0; j < res_setup->classifications; ++j) {
743  high_bits = 0;
744  low_bits = get_bits(gb, 3);
745  if (get_bits1(gb))
746  high_bits = get_bits(gb, 5);
747  cascade[j] = (high_bits << 3) + low_bits;
748 
749  ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
750  }
751 
752  res_setup->maxpass = 0;
753  for (j = 0; j < res_setup->classifications; ++j) {
754  for (k = 0; k < 8; ++k) {
755  if (cascade[j]&(1 << k)) {
756  GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
757 
758  ff_dlog(NULL, " %u class cascade depth %u book: %d\n",
759  j, k, res_setup->books[j][k]);
760 
761  if (k>res_setup->maxpass)
762  res_setup->maxpass = k;
763  } else {
764  res_setup->books[j][k] = -1;
765  }
766  }
767  }
768  }
769  return 0;
770 }
771 
772 // Process mappings part
773 
775 {
776  GetBitContext *gb = &vc->gb;
777  unsigned i, j;
778 
779  vc->mapping_count = get_bits(gb, 6)+1;
780  vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
781  if (!vc->mappings)
782  return AVERROR(ENOMEM);
783 
784  ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
785 
786  for (i = 0; i < vc->mapping_count; ++i) {
787  vorbis_mapping *mapping_setup = &vc->mappings[i];
788 
789  if (get_bits(gb, 16)) {
790  av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
791  return AVERROR_INVALIDDATA;
792  }
793  if (get_bits1(gb)) {
794  mapping_setup->submaps = get_bits(gb, 4) + 1;
795  } else {
796  mapping_setup->submaps = 1;
797  }
798 
799  if (get_bits1(gb)) {
800  mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
801  if (vc->audio_channels < 2) {
803  "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n");
804  return AVERROR_INVALIDDATA;
805  }
806  mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
807  sizeof(*mapping_setup->magnitude));
808  mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
809  sizeof(*mapping_setup->angle));
810  if (!mapping_setup->angle || !mapping_setup->magnitude)
811  return AVERROR(ENOMEM);
812 
813  for (j = 0; j < mapping_setup->coupling_steps; ++j) {
814  GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
815  GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
816  }
817  } else {
818  mapping_setup->coupling_steps = 0;
819  }
820 
821  ff_dlog(NULL, " %u mapping coupling steps: %d\n",
822  i, mapping_setup->coupling_steps);
823 
824  if (get_bits(gb, 2)) {
825  av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
826  return AVERROR_INVALIDDATA; // following spec.
827  }
828 
829  if (mapping_setup->submaps>1) {
830  mapping_setup->mux = av_mallocz_array(vc->audio_channels,
831  sizeof(*mapping_setup->mux));
832  if (!mapping_setup->mux)
833  return AVERROR(ENOMEM);
834 
835  for (j = 0; j < vc->audio_channels; ++j)
836  mapping_setup->mux[j] = get_bits(gb, 4);
837  }
838 
839  for (j = 0; j < mapping_setup->submaps; ++j) {
840  skip_bits(gb, 8); // FIXME check?
841  GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
842  GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
843 
844  ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
845  mapping_setup->submap_floor[j],
846  mapping_setup->submap_residue[j]);
847  }
848  }
849  return 0;
850 }
851 
852 // Process modes part
853 
854 static int create_map(vorbis_context *vc, unsigned floor_number)
855 {
856  vorbis_floor *floors = vc->floors;
857  vorbis_floor0 *vf;
858  int idx;
859  int blockflag, n;
860  int32_t *map;
861 
862  for (blockflag = 0; blockflag < 2; ++blockflag) {
863  n = vc->blocksize[blockflag] / 2;
864  floors[floor_number].data.t0.map[blockflag] =
865  av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
866  if (!floors[floor_number].data.t0.map[blockflag])
867  return AVERROR(ENOMEM);
868 
869  map = floors[floor_number].data.t0.map[blockflag];
870  vf = &floors[floor_number].data.t0;
871 
872  for (idx = 0; idx < n; ++idx) {
873  map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
874  (vf->bark_map_size / BARK(vf->rate / 2.0f)));
875  if (vf->bark_map_size-1 < map[idx])
876  map[idx] = vf->bark_map_size - 1;
877  }
878  map[n] = -1;
879  vf->map_size[blockflag] = n;
880  }
881 
882  for (idx = 0; idx <= n; ++idx) {
883  ff_dlog(NULL, "floor0 map: map at pos %d is %"PRId32"\n", idx, map[idx]);
884  }
885 
886  return 0;
887 }
888 
890 {
891  GetBitContext *gb = &vc->gb;
892  unsigned i;
893 
894  vc->mode_count = get_bits(gb, 6) + 1;
895  vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
896  if (!vc->modes)
897  return AVERROR(ENOMEM);
898 
899  ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
900 
901  for (i = 0; i < vc->mode_count; ++i) {
902  vorbis_mode *mode_setup = &vc->modes[i];
903 
904  mode_setup->blockflag = get_bits1(gb);
905  mode_setup->windowtype = get_bits(gb, 16); //FIXME check
906  mode_setup->transformtype = get_bits(gb, 16); //FIXME check
907  GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
908 
909  ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
910  i, mode_setup->blockflag, mode_setup->windowtype,
911  mode_setup->transformtype, mode_setup->mapping);
912  }
913  return 0;
914 }
915 
916 // Process the whole setup header using the functions above
917 
919 {
920  GetBitContext *gb = &vc->gb;
921  int ret;
922 
923  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
924  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
925  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
926  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
927  return AVERROR_INVALIDDATA;
928  }
929 
930  if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
931  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
932  return ret;
933  }
934  if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
935  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
936  return ret;
937  }
938  if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
939  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
940  return ret;
941  }
942  if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
943  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
944  return ret;
945  }
946  if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
947  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
948  return ret;
949  }
950  if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
951  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
952  return ret;
953  }
954  if (!get_bits1(gb)) {
955  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
956  return AVERROR_INVALIDDATA; // framing flag bit unset error
957  }
958 
959  return 0;
960 }
961 
962 // Process the identification header
963 
965 {
966  GetBitContext *gb = &vc->gb;
967  unsigned bl0, bl1;
968 
969  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
970  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
971  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
972  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
973  return AVERROR_INVALIDDATA;
974  }
975 
976  vc->version = get_bits_long(gb, 32); //FIXME check 0
977  vc->audio_channels = get_bits(gb, 8);
978  if (vc->audio_channels <= 0) {
979  av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
980  return AVERROR_INVALIDDATA;
981  }
982  vc->audio_samplerate = get_bits_long(gb, 32);
983  if (vc->audio_samplerate <= 0) {
984  av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
985  return AVERROR_INVALIDDATA;
986  }
987  vc->bitrate_maximum = get_bits_long(gb, 32);
988  vc->bitrate_nominal = get_bits_long(gb, 32);
989  vc->bitrate_minimum = get_bits_long(gb, 32);
990  bl0 = get_bits(gb, 4);
991  bl1 = get_bits(gb, 4);
992  if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
993  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
994  return AVERROR_INVALIDDATA;
995  }
996  vc->blocksize[0] = (1 << bl0);
997  vc->blocksize[1] = (1 << bl1);
998  vc->win[0] = ff_vorbis_vwin[bl0 - 6];
999  vc->win[1] = ff_vorbis_vwin[bl1 - 6];
1000 
1001  if ((get_bits1(gb)) == 0) {
1002  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1003  return AVERROR_INVALIDDATA;
1004  }
1005 
1006  vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1007  vc->saved = av_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1008  if (!vc->channel_residues || !vc->saved)
1009  return AVERROR(ENOMEM);
1010 
1011  vc->previous_window = -1;
1012 
1013  ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
1014  ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
1016  if (!vc->fdsp)
1017  return AVERROR(ENOMEM);
1018 
1019  ff_dlog(NULL, " vorbis version %"PRIu32" \n audio_channels %"PRIu8" \n audio_samplerate %"PRIu32" \n bitrate_max %"PRIu32" \n bitrate_nom %"PRIu32" \n bitrate_min %"PRIu32" \n blk_0 %"PRIu32" blk_1 %"PRIu32" \n ",
1021 
1022 /*
1023  BLK = vc->blocksize[0];
1024  for (i = 0; i < BLK / 2; ++i) {
1025  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)));
1026  }
1027 */
1028 
1029  return 0;
1030 }
1031 
1032 // Process the extradata using the functions above (identification header, setup header)
1033 
1035 {
1036  vorbis_context *vc = avctx->priv_data;
1037  uint8_t *headers = avctx->extradata;
1038  int headers_len = avctx->extradata_size;
1039  const uint8_t *header_start[3];
1040  int header_len[3];
1041  GetBitContext *gb = &vc->gb;
1042  int hdr_type, ret;
1043 
1044  vc->avctx = avctx;
1045  ff_vorbisdsp_init(&vc->dsp);
1046 
1047  avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1048 
1049  if (!headers_len) {
1050  av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1051  return AVERROR_INVALIDDATA;
1052  }
1053 
1054  if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1055  av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1056  return ret;
1057  }
1058 
1059  init_get_bits(gb, header_start[0], header_len[0]*8);
1060  hdr_type = get_bits(gb, 8);
1061  if (hdr_type != 1) {
1062  av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1063  return AVERROR_INVALIDDATA;
1064  }
1065  if ((ret = vorbis_parse_id_hdr(vc))) {
1066  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1067  vorbis_free(vc);
1068  return ret;
1069  }
1070 
1071  init_get_bits(gb, header_start[2], header_len[2]*8);
1072  hdr_type = get_bits(gb, 8);
1073  if (hdr_type != 5) {
1074  av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1075  vorbis_free(vc);
1076  return AVERROR_INVALIDDATA;
1077  }
1078  if ((ret = vorbis_parse_setup_hdr(vc))) {
1079  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1080  vorbis_free(vc);
1081  return ret;
1082  }
1083 
1084  if (vc->audio_channels > 8)
1085  avctx->channel_layout = 0;
1086  else
1088 
1089  avctx->channels = vc->audio_channels;
1090  avctx->sample_rate = vc->audio_samplerate;
1091 
1092  return 0;
1093 }
1094 
1095 // Decode audiopackets -------------------------------------------------
1096 
1097 // Read and decode floor
1098 
1100  vorbis_floor_data *vfu, float *vec)
1101 {
1102  vorbis_floor0 *vf = &vfu->t0;
1103  float *lsp = vf->lsp;
1104  unsigned book_idx;
1105  uint64_t amplitude;
1106  unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1107 
1108  if (!vf->amplitude_bits)
1109  return 1;
1110 
1111  amplitude = get_bits64(&vc->gb, vf->amplitude_bits);
1112  if (amplitude > 0) {
1113  float last = 0;
1114  unsigned idx, lsp_len = 0;
1115  vorbis_codebook codebook;
1116 
1117  book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1118  if (book_idx >= vf->num_books) {
1119  av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1120  book_idx = 0;
1121  }
1122  ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1123  codebook = vc->codebooks[vf->book_list[book_idx]];
1124  /* Invalid codebook! */
1125  if (!codebook.codevectors)
1126  return AVERROR_INVALIDDATA;
1127 
1128  while (lsp_len<vf->order) {
1129  int vec_off;
1130 
1131  ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1132  ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1133  /* read temp vector */
1134  vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1135  codebook.nb_bits, codebook.maxdepth);
1136  if (vec_off < 0)
1137  return AVERROR_INVALIDDATA;
1138  vec_off *= codebook.dimensions;
1139  ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1140  /* copy each vector component and add last to it */
1141  for (idx = 0; idx < codebook.dimensions; ++idx)
1142  lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1143  last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1144 
1145  lsp_len += codebook.dimensions;
1146  }
1147  /* DEBUG: output lsp coeffs */
1148  {
1149  int idx;
1150  for (idx = 0; idx < lsp_len; ++idx)
1151  ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1152  }
1153 
1154  /* synthesize floor output vector */
1155  {
1156  int i;
1157  int order = vf->order;
1158  float wstep = M_PI / vf->bark_map_size;
1159 
1160  for (i = 0; i < order; i++)
1161  lsp[i] = 2.0f * cos(lsp[i]);
1162 
1163  ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1164  vf->map_size[blockflag], order, wstep);
1165 
1166  i = 0;
1167  while (i < vf->map_size[blockflag]) {
1168  int j, iter_cond = vf->map[blockflag][i];
1169  float p = 0.5f;
1170  float q = 0.5f;
1171  float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1172 
1173  /* similar part for the q and p products */
1174  for (j = 0; j + 1 < order; j += 2) {
1175  q *= lsp[j] - two_cos_w;
1176  p *= lsp[j + 1] - two_cos_w;
1177  }
1178  if (j == order) { // even order
1179  p *= p * (2.0f - two_cos_w);
1180  q *= q * (2.0f + two_cos_w);
1181  } else { // odd order
1182  q *= two_cos_w-lsp[j]; // one more time for q
1183 
1184  /* final step and square */
1185  p *= p * (4.f - two_cos_w * two_cos_w);
1186  q *= q;
1187  }
1188 
1189  if (p + q == 0.0)
1190  return AVERROR_INVALIDDATA;
1191 
1192  /* calculate linear floor value */
1193  q = exp((((amplitude*vf->amplitude_offset) /
1194  (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q)))
1195  - vf->amplitude_offset) * .11512925f);
1196 
1197  /* fill vector */
1198  do {
1199  vec[i] = q; ++i;
1200  } while (vf->map[blockflag][i] == iter_cond);
1201  }
1202  }
1203  } else {
1204  /* this channel is unused */
1205  return 1;
1206  }
1207 
1208  ff_dlog(NULL, " Floor0 decoded\n");
1209 
1210  return 0;
1211 }
1212 
1214  vorbis_floor_data *vfu, float *vec)
1215 {
1216  vorbis_floor1 *vf = &vfu->t1;
1217  GetBitContext *gb = &vc->gb;
1218  uint16_t range_v[4] = { 256, 128, 86, 64 };
1219  unsigned range = range_v[vf->multiplier - 1];
1220  uint16_t floor1_Y[258];
1221  uint16_t floor1_Y_final[258];
1222  int floor1_flag[258];
1223  unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1224  int book, adx, ady, dy, off, predicted, err;
1225 
1226 
1227  if (!get_bits1(gb)) // silence
1228  return 1;
1229 
1230 // Read values (or differences) for the floor's points
1231 
1232  floor1_Y[0] = get_bits(gb, ilog(range - 1));
1233  floor1_Y[1] = get_bits(gb, ilog(range - 1));
1234 
1235  ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1236 
1237  offset = 2;
1238  for (i = 0; i < vf->partitions; ++i) {
1239  partition_class = vf->partition_class[i];
1240  cdim = vf->class_dimensions[partition_class];
1241  cbits = vf->class_subclasses[partition_class];
1242  csub = (1 << cbits) - 1;
1243  cval = 0;
1244 
1245  ff_dlog(NULL, "Cbits %u\n", cbits);
1246 
1247  if (cbits) // this reads all subclasses for this partition's class
1248  cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1249  vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1250 
1251  for (j = 0; j < cdim; ++j) {
1252  book = vf->subclass_books[partition_class][cval & csub];
1253 
1254  ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1255  book, cbits, cval, get_bits_count(gb));
1256 
1257  cval = cval >> cbits;
1258  if (book > -1) {
1259  int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1260  vc->codebooks[book].nb_bits, 3);
1261  if (v < 0)
1262  return AVERROR_INVALIDDATA;
1263  floor1_Y[offset+j] = v;
1264  } else {
1265  floor1_Y[offset+j] = 0;
1266  }
1267 
1268  ff_dlog(NULL, " floor(%d) = %d \n",
1269  vf->list[offset+j].x, floor1_Y[offset+j]);
1270  }
1271  offset+=cdim;
1272  }
1273 
1274 // Amplitude calculation from the differences
1275 
1276  floor1_flag[0] = 1;
1277  floor1_flag[1] = 1;
1278  floor1_Y_final[0] = floor1_Y[0];
1279  floor1_Y_final[1] = floor1_Y[1];
1280 
1281  for (i = 2; i < vf->x_list_dim; ++i) {
1282  unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1283 
1284  low_neigh_offs = vf->list[i].low;
1285  high_neigh_offs = vf->list[i].high;
1286  dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1287  adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1288  ady = FFABS(dy);
1289  err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1290  off = err / adx;
1291  if (dy < 0) {
1292  predicted = floor1_Y_final[low_neigh_offs] - off;
1293  } else {
1294  predicted = floor1_Y_final[low_neigh_offs] + off;
1295  } // render_point end
1296 
1297  val = floor1_Y[i];
1298  highroom = range-predicted;
1299  lowroom = predicted;
1300  if (highroom < lowroom) {
1301  room = highroom * 2;
1302  } else {
1303  room = lowroom * 2; // SPEC misspelling
1304  }
1305  if (val) {
1306  floor1_flag[low_neigh_offs] = 1;
1307  floor1_flag[high_neigh_offs] = 1;
1308  floor1_flag[i] = 1;
1309  if (val >= room) {
1310  if (highroom > lowroom) {
1311  floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1312  } else {
1313  floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1314  }
1315  } else {
1316  if (val & 1) {
1317  floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1318  } else {
1319  floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1320  }
1321  }
1322  } else {
1323  floor1_flag[i] = 0;
1324  floor1_Y_final[i] = av_clip_uint16(predicted);
1325  }
1326 
1327  ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1328  vf->list[i].x, floor1_Y_final[i], val);
1329  }
1330 
1331 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1332 
1333  ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1334 
1335  ff_dlog(NULL, " Floor decoded\n");
1336 
1337  return 0;
1338 }
1339 
1341  vorbis_residue *vr,
1342  uint8_t *do_not_decode,
1343  unsigned ch_used,
1344  int partition_count,
1345  int ptns_to_read
1346  )
1347 {
1348  vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1349  int p, j, i;
1350  unsigned c_p_c = codebook->dimensions;
1351  unsigned inverse_class = ff_inverse[vr->classifications];
1352  int temp, temp2;
1353  for (p = 0, j = 0; j < ch_used; ++j) {
1354  if (!do_not_decode[j]) {
1355  temp = get_vlc2(&vc->gb, codebook->vlc.table,
1356  codebook->nb_bits, 3);
1357 
1358  ff_dlog(NULL, "Classword: %u\n", temp);
1359 
1360  av_assert0(temp < 65536);
1361 
1362  if (temp < 0) {
1363  av_log(vc->avctx, AV_LOG_ERROR,
1364  "Invalid vlc code decoding %d channel.", j);
1365  return AVERROR_INVALIDDATA;
1366  }
1367 
1368  if (vr->classifications == 1) {
1369  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1370  if (i < ptns_to_read)
1371  vr->classifs[p + i] = 0;
1372  }
1373  } else {
1374  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1375  temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1376 
1377  if (i < ptns_to_read)
1378  vr->classifs[p + i] = temp - temp2 * vr->classifications;
1379  temp = temp2;
1380  }
1381  }
1382  }
1383  p += ptns_to_read;
1384  }
1385  return 0;
1386 }
1387 // Read and decode residue
1388 
1390  vorbis_residue *vr,
1391  unsigned ch,
1392  uint8_t *do_not_decode,
1393  float *vec,
1394  unsigned vlen,
1395  unsigned ch_left,
1396  int vr_type)
1397 {
1398  GetBitContext *gb = &vc->gb;
1399  unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1400  uint8_t *classifs = vr->classifs;
1401  unsigned pass, ch_used, i, j, k, l;
1402  unsigned max_output = (ch - 1) * vlen;
1403  int ptns_to_read = vr->ptns_to_read;
1404  int libvorbis_bug = 0;
1405 
1406  if (vr_type == 2) {
1407  for (j = 1; j < ch; ++j)
1408  do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1409  if (do_not_decode[0])
1410  return 0;
1411  ch_used = 1;
1412  max_output += vr->end / ch;
1413  } else {
1414  ch_used = ch;
1415  max_output += vr->end;
1416  }
1417 
1418  if (max_output > ch_left * vlen) {
1419  if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1420  ptns_to_read--;
1421  libvorbis_bug = 1;
1422  } else {
1423  av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1424  return AVERROR_INVALIDDATA;
1425  }
1426  }
1427 
1428  ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1429 
1430  for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1431  int voffset, partition_count, j_times_ptns_to_read;
1432 
1433  voffset = vr->begin;
1434  for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1435  if (!pass) {
1436  int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1437  if (ret < 0)
1438  return ret;
1439  }
1440  for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1441  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1442  unsigned voffs;
1443 
1444  if (!do_not_decode[j]) {
1445  unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1446  int vqbook = vr->books[vqclass][pass];
1447 
1448  if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1449  int coffs;
1450  unsigned dim = vc->codebooks[vqbook].dimensions;
1451  unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1452  vorbis_codebook codebook = vc->codebooks[vqbook];
1453 
1454  if (get_bits_left(gb) <= 0)
1455  return AVERROR_INVALIDDATA;
1456 
1457  if (vr_type == 0) {
1458 
1459  voffs = voffset+j*vlen;
1460  for (k = 0; k < step; ++k) {
1461  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1462  if (coffs < 0)
1463  return coffs;
1464  coffs *= dim;
1465  for (l = 0; l < dim; ++l)
1466  vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1467  }
1468  } else if (vr_type == 1) {
1469  voffs = voffset + j * vlen;
1470  for (k = 0; k < step; ++k) {
1471  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1472  if (coffs < 0)
1473  return coffs;
1474  coffs *= dim;
1475  for (l = 0; l < dim; ++l, ++voffs) {
1476  vec[voffs]+=codebook.codevectors[coffs+l];
1477 
1478  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1479  pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1480  }
1481  }
1482  } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1483  voffs = voffset >> 1;
1484 
1485  if (dim == 2) {
1486  for (k = 0; k < step; ++k) {
1487  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1488  if (coffs < 0)
1489  return coffs;
1490  coffs *= 2;
1491  vec[voffs + k ] += codebook.codevectors[coffs ];
1492  vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1493  }
1494  } else if (dim == 4) {
1495  for (k = 0; k < step; ++k, voffs += 2) {
1496  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1497  if (coffs < 0)
1498  return coffs;
1499  coffs *= 4;
1500  vec[voffs ] += codebook.codevectors[coffs ];
1501  vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1502  vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1503  vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1504  }
1505  } else
1506  for (k = 0; k < step; ++k) {
1507  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1508  if (coffs < 0)
1509  return coffs;
1510  coffs *= dim;
1511  for (l = 0; l < dim; l += 2, voffs++) {
1512  vec[voffs ] += codebook.codevectors[coffs + l ];
1513  vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1514 
1515  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1516  pass, voffset / ch + (voffs % ch) * vlen,
1517  vec[voffset / ch + (voffs % ch) * vlen],
1518  codebook.codevectors[coffs + l], coffs, l);
1519  }
1520  }
1521 
1522  } else if (vr_type == 2) {
1523  unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1524  unsigned voffs_mod = voffset - voffs_div * ch;
1525 
1526  for (k = 0; k < step; ++k) {
1527  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1528  if (coffs < 0)
1529  return coffs;
1530  coffs *= dim;
1531  for (l = 0; l < dim; ++l) {
1532  vec[voffs_div + voffs_mod * vlen] +=
1533  codebook.codevectors[coffs + l];
1534 
1535  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1536  pass, voffs_div + voffs_mod * vlen,
1537  vec[voffs_div + voffs_mod * vlen],
1538  codebook.codevectors[coffs + l], coffs, l);
1539 
1540  if (++voffs_mod == ch) {
1541  voffs_div++;
1542  voffs_mod = 0;
1543  }
1544  }
1545  }
1546  }
1547  }
1548  }
1549  j_times_ptns_to_read += ptns_to_read;
1550  }
1551  ++partition_count;
1552  voffset += vr->partition_size;
1553  }
1554  }
1555  if (libvorbis_bug && !pass) {
1556  for (j = 0; j < ch_used; ++j) {
1557  if (!do_not_decode[j]) {
1558  get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1559  vc->codebooks[vr->classbook].nb_bits, 3);
1560  }
1561  }
1562  }
1563  }
1564  return 0;
1565 }
1566 
1568  unsigned ch,
1569  uint8_t *do_not_decode,
1570  float *vec, unsigned vlen,
1571  unsigned ch_left)
1572 {
1573  if (vr->type == 2)
1574  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1575  else if (vr->type == 1)
1576  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1577  else if (vr->type == 0)
1578  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1579  else {
1580  av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1581  return AVERROR_INVALIDDATA;
1582  }
1583 }
1584 
1585 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1586 {
1587  int i;
1588  for (i = 0; i < blocksize; i++) {
1589  if (mag[i] > 0.0) {
1590  if (ang[i] > 0.0) {
1591  ang[i] = mag[i] - ang[i];
1592  } else {
1593  float temp = ang[i];
1594  ang[i] = mag[i];
1595  mag[i] += temp;
1596  }
1597  } else {
1598  if (ang[i] > 0.0) {
1599  ang[i] += mag[i];
1600  } else {
1601  float temp = ang[i];
1602  ang[i] = mag[i];
1603  mag[i] -= temp;
1604  }
1605  }
1606  }
1607 }
1608 
1609 // Decode the audio packet using the functions above
1610 
1611 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1612 {
1613  GetBitContext *gb = &vc->gb;
1614  FFTContext *mdct;
1615  int previous_window = vc->previous_window;
1616  unsigned mode_number, blockflag, blocksize;
1617  int i, j;
1618  uint8_t no_residue[255];
1619  uint8_t do_not_decode[255];
1620  vorbis_mapping *mapping;
1621  float *ch_res_ptr = vc->channel_residues;
1622  uint8_t res_chan[255];
1623  unsigned res_num = 0;
1624  int retlen = 0;
1625  unsigned ch_left = vc->audio_channels;
1626  unsigned vlen;
1627 
1628  if (get_bits1(gb)) {
1629  av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1630  return AVERROR_INVALIDDATA; // packet type not audio
1631  }
1632 
1633  if (vc->mode_count == 1) {
1634  mode_number = 0;
1635  } else {
1636  GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1637  }
1638  vc->mode_number = mode_number;
1639  mapping = &vc->mappings[vc->modes[mode_number].mapping];
1640 
1641  ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1642  vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1643 
1644  blockflag = vc->modes[mode_number].blockflag;
1645  blocksize = vc->blocksize[blockflag];
1646  vlen = blocksize / 2;
1647  if (blockflag) {
1648  int code = get_bits(gb, 2);
1649  if (previous_window < 0)
1650  previous_window = code>>1;
1651  } else if (previous_window < 0)
1652  previous_window = 0;
1653 
1654  memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1655  for (i = 0; i < vc->audio_channels; ++i)
1656  memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1657 
1658 // Decode floor
1659 
1660  for (i = 0; i < vc->audio_channels; ++i) {
1661  vorbis_floor *floor;
1662  int ret;
1663  if (mapping->submaps > 1) {
1664  floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1665  } else {
1666  floor = &vc->floors[mapping->submap_floor[0]];
1667  }
1668 
1669  ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1670 
1671  if (ret < 0) {
1672  av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1673  return AVERROR_INVALIDDATA;
1674  }
1675  no_residue[i] = ret;
1676  }
1677 
1678 // Nonzero vector propagate
1679 
1680  for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1681  if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1682  no_residue[mapping->magnitude[i]] = 0;
1683  no_residue[mapping->angle[i]] = 0;
1684  }
1685  }
1686 
1687 // Decode residue
1688 
1689  for (i = 0; i < mapping->submaps; ++i) {
1690  vorbis_residue *residue;
1691  unsigned ch = 0;
1692  int ret;
1693 
1694  for (j = 0; j < vc->audio_channels; ++j) {
1695  if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1696  res_chan[j] = res_num;
1697  if (no_residue[j]) {
1698  do_not_decode[ch] = 1;
1699  } else {
1700  do_not_decode[ch] = 0;
1701  }
1702  ++ch;
1703  ++res_num;
1704  }
1705  }
1706  residue = &vc->residues[mapping->submap_residue[i]];
1707  if (ch_left < ch) {
1708  av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1709  return AVERROR_INVALIDDATA;
1710  }
1711  if (ch) {
1712  ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1713  if (ret < 0)
1714  return ret;
1715  }
1716 
1717  ch_res_ptr += ch * vlen;
1718  ch_left -= ch;
1719  }
1720 
1721  if (ch_left > 0)
1722  return AVERROR_INVALIDDATA;
1723 
1724 // Inverse coupling
1725 
1726  for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1727  float *mag, *ang;
1728 
1729  mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1730  ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1731  vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1732  }
1733 
1734 // Dotproduct, MDCT
1735 
1736  mdct = &vc->mdct[blockflag];
1737 
1738  for (j = vc->audio_channels-1;j >= 0; j--) {
1739  ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1740  vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1741  mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1742  }
1743 
1744 // Overlap/add, save data for next overlapping
1745 
1746  retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1747  for (j = 0; j < vc->audio_channels; j++) {
1748  unsigned bs0 = vc->blocksize[0];
1749  unsigned bs1 = vc->blocksize[1];
1750  float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1751  float *saved = vc->saved + j * bs1 / 4;
1752  float *ret = floor_ptr[j];
1753  float *buf = residue;
1754  const float *win = vc->win[blockflag & previous_window];
1755 
1756  if (blockflag == previous_window) {
1757  vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1758  } else if (blockflag > previous_window) {
1759  vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1760  memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1761  } else {
1762  memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1763  vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1764  }
1765  memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1766  }
1767 
1768  vc->previous_window = blockflag;
1769  return retlen;
1770 }
1771 
1772 // Return the decoded audio packet through the standard api
1773 
1774 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1775  int *got_frame_ptr, AVPacket *avpkt)
1776 {
1777  const uint8_t *buf = avpkt->data;
1778  int buf_size = avpkt->size;
1779  vorbis_context *vc = avctx->priv_data;
1780  AVFrame *frame = data;
1781  GetBitContext *gb = &vc->gb;
1782  float *channel_ptrs[255];
1783  int i, len, ret;
1784 
1785  ff_dlog(NULL, "packet length %d \n", buf_size);
1786 
1787  if (*buf == 1 && buf_size > 7) {
1788  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1789  return ret;
1790 
1791  vorbis_free(vc);
1792  if ((ret = vorbis_parse_id_hdr(vc))) {
1793  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1794  vorbis_free(vc);
1795  return ret;
1796  }
1797 
1798  if (vc->audio_channels > 8)
1799  avctx->channel_layout = 0;
1800  else
1802 
1803  avctx->channels = vc->audio_channels;
1804  avctx->sample_rate = vc->audio_samplerate;
1805  return buf_size;
1806  }
1807 
1808  if (*buf == 3 && buf_size > 7) {
1809  av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1810  return buf_size;
1811  }
1812 
1813  if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1814  if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1815  return ret;
1816 
1817  if ((ret = vorbis_parse_setup_hdr(vc))) {
1818  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1819  vorbis_free(vc);
1820  return ret;
1821  }
1822  return buf_size;
1823  }
1824 
1825  if (!vc->channel_residues || !vc->modes) {
1826  av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1827  return AVERROR_INVALIDDATA;
1828  }
1829 
1830  /* get output buffer */
1831  frame->nb_samples = vc->blocksize[1] / 2;
1832  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1833  return ret;
1834 
1835  if (vc->audio_channels > 8) {
1836  for (i = 0; i < vc->audio_channels; i++)
1837  channel_ptrs[i] = (float *)frame->extended_data[i];
1838  } else {
1839  for (i = 0; i < vc->audio_channels; i++) {
1841  channel_ptrs[ch] = (float *)frame->extended_data[i];
1842  }
1843  }
1844 
1845  if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1846  return ret;
1847 
1848  if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1849  return len;
1850 
1851  if (!vc->first_frame) {
1852  vc->first_frame = 1;
1853  *got_frame_ptr = 0;
1854  av_frame_unref(frame);
1855  return buf_size;
1856  }
1857 
1858  ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1859  get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1860 
1861  frame->nb_samples = len;
1862  *got_frame_ptr = 1;
1863 
1864  return buf_size;
1865 }
1866 
1867 // Close decoder
1868 
1870 {
1871  vorbis_context *vc = avctx->priv_data;
1872 
1873  vorbis_free(vc);
1874 
1875  return 0;
1876 }
1877 
1879 {
1880  vorbis_context *vc = avctx->priv_data;
1881 
1882  if (vc->saved) {
1883  memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1884  sizeof(*vc->saved));
1885  }
1886  vc->previous_window = -1;
1887  vc->first_frame = 0;
1888 }
1889 
1891  .name = "vorbis",
1892  .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1893  .type = AVMEDIA_TYPE_AUDIO,
1894  .id = AV_CODEC_ID_VORBIS,
1895  .priv_data_size = sizeof(vorbis_context),
1897  .close = vorbis_decode_close,
1900  .capabilities = AV_CODEC_CAP_DR1,
1901  .caps_internal = FF_CODEC_CAP_INIT_CLEANUP,
1903  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1905 };
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
Definition: internal.h:48
float, planar
Definition: samplefmt.h:69
vorbis_codebook * codebooks
Definition: vorbisdec.c:142
#define NULL
Definition: coverity.c:32
struct vorbis_floor1_s vorbis_floor1
Definition: vorbisdec.c:60
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint16_t windowtype
Definition: vorbisdec.c:120
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n)
Definition: vorbis.c:38
const float * win[2]
Definition: vorbisdec.c:140
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
Definition: vorbisdec.c:503
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
static void flush(AVCodecContext *avctx)
void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdec.c:1585
uint32_t version
Definition: vorbisdec.c:133
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)
Definition: vorbisdec.c:64
else temp
Definition: vf_mcdeint.c:256
static float win(SuperEqualizerContext *s, float n, int N)
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
Definition: vorbisdec.c:1869
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
int size
Definition: packet.h:356
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
static void error(const char *err)
#define init_vlc(vlc, nb_bits, nb_codes, bits, bits_wrap, bits_size, codes, codes_wrap, codes_size, flags)
Definition: vlc.h:38
AVCodec.
Definition: codec.h:190
#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:1389
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
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:215
const uint32_t ff_inverse[257]
Definition: mathtables.c:27
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:1194
uint8_t
VorbisDSPContext dsp
Definition: vorbisdec.c:128
#define av_cold
Definition: attributes.h:88
#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
#define f(width, name)
Definition: cbs_vp9.c:255
static int vorbis_floor0_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1099
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 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:627
#define t0
Definition: regdef.h:28
static AVFrame * frame
const char data[16]
Definition: mxf.c:91
uint8_t * mux
Definition: vorbisdec.c:113
void(* vorbis_inverse_coupling)(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdsp.h:26
uint8_t * data
Definition: packet.h:355
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:219
unsigned int nb_bits
Definition: vorbisdec.c:55
uint8_t maxpass
Definition: vorbisdec.c:103
#define ff_dlog(a,...)
bitstream reader API header.
#define av_log(a,...)
FFTContext mdct[2]
Definition: vorbisdec.c:131
#define V_NB_BITS2
Definition: vorbisdec.c:45
static int get_bits_left(GetBitContext *gb)
Definition: get_bits.h:849
static uint64_t get_bits64(GetBitContext *s, int n)
Read 0-64 bits.
Definition: get_bits.h:572
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:119
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
uint16_t transformtype
Definition: vorbisdec.c:121
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
uint8_t classbook
Definition: vorbisdec.c:101
#define isfinite(x)
Definition: libm.h:359
#define AVERROR(e)
Definition: error.h:43
static int create_map(vorbis_context *vc, unsigned floor_number)
Definition: vorbisdec.c:854
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
const uint8_t * code
Definition: spdifenc.c:413
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:1213
#define t1
Definition: regdef.h:29
uint16_t ptns_to_read
Definition: vorbisdec.c:104
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:606
simple assert() macros that are a bit more flexible than ISO C assert().
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:237
const char * name
Name of the codec implementation.
Definition: codec.h:197
uint8_t bits
Definition: vp3data.h:202
AVCodec ff_vorbis_decoder
Definition: vorbisdec.c:1890
#define ff_mdct_init
Definition: fft.h:169
static const uint8_t offset[127][2]
Definition: vf_spp.c:93
float * saved
Definition: vorbisdec.c:154
int8_t exp
Definition: eval.c:72
Definition: vlc.h:26
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:1237
#define pass
Definition: fft_template.c:609
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:964
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:333
#define FFMIN(a, b)
Definition: common.h:96
union vorbis_floor::vorbis_floor_u data
static void vorbis_free(vorbis_context *vc)
Definition: vorbisdec.c:188
int32_t
uint8_t blockflag
Definition: vorbisdec.c:119
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
Definition: vorbis.c:56
struct vorbis_floor0_s vorbis_floor0
Definition: vorbisdec.c:59
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
int avpriv_split_xiph_headers(const uint8_t *extradata, int extradata_size, int first_header_size, const uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
Definition: get_bits.h:797
uint32_t blocksize[2]
Definition: vorbisdec.c:139
#define L(x)
Definition: vp56_arith.h:36
uint8_t submap_floor[16]
Definition: vorbisdec.c:114
uint16_t coupling_steps
Definition: vorbisdec.c:110
#define INIT_VLC_LE
Definition: vlc.h:54
uint8_t submap_residue[16]
Definition: vorbisdec.c:115
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
Definition: vorbisdec.c:693
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
Definition: vorbisdec.c:774
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:1340
Libavcodec external API header.
AVFloatDSPContext * fdsp
Definition: vorbisdec.c:129
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1774
int sample_rate
samples per second
Definition: avcodec.h:1186
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:677
uint16_t type
Definition: vorbisdec.c:96
uint8_t audio_channels
Definition: vorbisdec.c:134
main external API structure.
Definition: avcodec.h:526
#define FASTDIV(a, b)
Definition: mathops.h:202
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: decode.c:1854
uint8_t maxdepth
Definition: vorbisdec.c:52
int extradata_size
Definition: avcodec.h:628
uint8_t classifications
Definition: vorbisdec.c:100
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:498
vorbis_mapping * mappings
Definition: vorbisdec.c:148
static const uint16_t channel_layouts[7]
Definition: dca_lbr.c:113
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
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:659
static int vorbis_parse_setup_hdr(vorbis_context *vc)
Definition: vorbisdec.c:918
int dim
const VDPAUPixFmtMap * map
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
uint32_t bitrate_nominal
Definition: vorbisdec.c:137
uint32_t bitrate_maximum
Definition: vorbisdec.c:136
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:108
#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:554
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:1034
uint8_t * classifs
Definition: vorbisdec.c:105
int
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:279
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
#define ff_mdct_end
Definition: fft.h:170
#define flag(name)
Definition: cbs_av1.c:568
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:1567
GetBitContext gb
Definition: vorbisdec.c:127
vorbis_floor_decode_func decode
Definition: vorbisdec.c:67
void * priv_data
Definition: avcodec.h:553
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
Definition: vorbisdec.c:477
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
Definition: vorbisdec.c:889
#define av_free(p)
int len
uint8_t * angle
Definition: vorbisdec.c:112
int channels
number of audio channels
Definition: avcodec.h:1187
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
uint32_t end
Definition: vorbisdec.c:98
int16_t books[64][8]
Definition: vorbisdec.c:102
void ff_vorbis_floor1_render_list(vorbis_floor1_entry *list, int values, uint16_t *y_list, int *flag, int multiplier, float *out, int samples)
Definition: vorbis.c:196
uint8_t lookup_type
Definition: vorbisdec.c:51
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:731
struct vorbis_floor::vorbis_floor_u::vorbis_floor0_s t0
#define av_freep(p)
#define av_always_inline
Definition: attributes.h:45
#define M_PI
Definition: mathematics.h:52
#define av_malloc_array(a, b)
vorbis_floor * floors
Definition: vorbisdec.c:144
uint32_t begin
Definition: vorbisdec.c:97
const uint8_t ff_vorbis_channel_layout_offsets[8][8]
Definition: vorbis_data.c:25
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:347
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
Definition: vorbisdec.c:1878
Definition: vorbis.h:32
static double val(void *priv, double ch)
Definition: aeval.c:76
This structure stores compressed data.
Definition: packet.h:332
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
Definition: vorbisdec.c:238
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:359
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
Definition: vorbisdec.c:1611
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:366
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
uint8_t submaps
Definition: vorbisdec.c:109
void * av_mallocz_array(size_t nmemb, size_t size)
Allocate a memory block for an array with av_mallocz().
Definition: mem.c:190
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, vorbis_floor1_entry *list, int values)
Definition: vorbis.c:106