Libav
vorbisdec.c
Go to the documentation of this file.
1 /*
2  * This file is part of Libav.
3  *
4  * Libav is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * Libav is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with Libav; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
25 #include <inttypes.h>
26 #include <math.h>
27 
28 #include "libavutil/float_dsp.h"
29 
30 #define BITSTREAM_READER_LE
31 #include "avcodec.h"
32 #include "fft.h"
33 #include "get_bits.h"
34 #include "internal.h"
35 #include "vorbis.h"
36 #include "vorbisdsp.h"
37 #include "xiph.h"
38 
39 #define V_NB_BITS 8
40 #define V_NB_BITS2 11
41 #define V_MAX_VLCS (1 << 16)
42 #define V_MAX_PARTITIONS (1 << 20)
43 
44 typedef struct vorbis_codebook {
49  float *codevectors;
50  unsigned int nb_bits;
52 
53 typedef union vorbis_floor_u vorbis_floor_data;
54 typedef struct vorbis_floor0_s vorbis_floor0;
55 typedef struct vorbis_floor1_s vorbis_floor1;
56 struct vorbis_context_s;
57 typedef
59  (struct vorbis_context_s *, vorbis_floor_data *, float *);
60 typedef struct vorbis_floor {
64  struct vorbis_floor0_s {
66  uint16_t rate;
67  uint16_t bark_map_size;
68  int32_t *map[2];
69  uint32_t map_size[2];
74  float *lsp;
75  } t0;
76  struct vorbis_floor1_s {
78  uint8_t partition_class[32];
79  uint8_t class_dimensions[16];
80  uint8_t class_subclasses[16];
81  uint8_t class_masterbook[16];
82  int16_t subclass_books[16][8];
84  uint16_t x_list_dim;
86  } t1;
87  } data;
88 } vorbis_floor;
89 
90 typedef struct vorbis_residue {
91  uint16_t type;
92  uint32_t begin;
93  uint32_t end;
94  unsigned partition_size;
97  int16_t books[64][8];
99  uint16_t ptns_to_read;
102 
103 typedef struct vorbis_mapping {
105  uint16_t coupling_steps;
109  uint8_t submap_floor[16];
110  uint8_t submap_residue[16];
112 
113 typedef struct vorbis_mode {
115  uint16_t windowtype;
116  uint16_t transformtype;
118 } vorbis_mode;
119 
120 typedef struct vorbis_context_s {
125 
126  FFTContext mdct[2];
128  uint32_t version;
131  uint32_t bitrate_maximum;
132  uint32_t bitrate_nominal;
133  uint32_t bitrate_minimum;
134  uint32_t blocksize[2];
135  const float *win[2];
136  uint16_t codebook_count;
146  uint8_t mode_number; // mode number for the current packet
149  float *saved;
151 
152 /* Helper functions */
153 
154 #define BARK(x) \
155  (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
156 
157 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
158 #define VALIDATE_INDEX(idx, limit) \
159  if (idx >= limit) {\
160  av_log(vc->avctx, AV_LOG_ERROR,\
161  idx_err_str,\
162  (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
163  return AVERROR_INVALIDDATA;\
164  }
165 #define GET_VALIDATED_INDEX(idx, bits, limit) \
166  {\
167  idx = get_bits(gb, bits);\
168  VALIDATE_INDEX(idx, limit)\
169  }
170 
171 static float vorbisfloat2float(unsigned val)
172 {
173  double mant = val & 0x1fffff;
174  long exp = (val & 0x7fe00000L) >> 21;
175  if (val & 0x80000000)
176  mant = -mant;
177  return ldexp(mant, exp - 20 - 768);
178 }
179 
180 
181 // Free all allocated memory -----------------------------------------
182 
183 static void vorbis_free(vorbis_context *vc)
184 {
185  int i;
186 
188  av_freep(&vc->saved);
189 
190  for (i = 0; i < vc->residue_count; i++)
191  av_free(vc->residues[i].classifs);
192  av_freep(&vc->residues);
193  av_freep(&vc->modes);
194 
195  ff_mdct_end(&vc->mdct[0]);
196  ff_mdct_end(&vc->mdct[1]);
197 
198  for (i = 0; i < vc->codebook_count; ++i) {
199  av_free(vc->codebooks[i].codevectors);
200  ff_free_vlc(&vc->codebooks[i].vlc);
201  }
202  av_freep(&vc->codebooks);
203 
204  for (i = 0; i < vc->floor_count; ++i) {
205  if (vc->floors[i].floor_type == 0) {
206  av_free(vc->floors[i].data.t0.map[0]);
207  av_free(vc->floors[i].data.t0.map[1]);
208  av_free(vc->floors[i].data.t0.book_list);
209  av_free(vc->floors[i].data.t0.lsp);
210  } else {
211  av_free(vc->floors[i].data.t1.list);
212  }
213  }
214  av_freep(&vc->floors);
215 
216  for (i = 0; i < vc->mapping_count; ++i) {
217  av_free(vc->mappings[i].magnitude);
218  av_free(vc->mappings[i].angle);
219  av_free(vc->mappings[i].mux);
220  }
221  av_freep(&vc->mappings);
222 }
223 
224 // Parse setup header -------------------------------------------------
225 
226 // Process codebooks part
227 
229 {
230  unsigned cb;
231  uint8_t *tmp_vlc_bits = NULL;
232  uint32_t *tmp_vlc_codes = NULL;
233  GetBitContext *gb = &vc->gb;
234  uint16_t *codebook_multiplicands = NULL;
235  int ret = 0;
236 
237  vc->codebook_count = get_bits(gb, 8) + 1;
238 
239  ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
240 
241  vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
242  tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
243  tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
244  codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
245  if (!vc->codebooks ||
246  !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
247  ret = AVERROR(ENOMEM);
248  goto error;
249  }
250 
251  for (cb = 0; cb < vc->codebook_count; ++cb) {
252  vorbis_codebook *codebook_setup = &vc->codebooks[cb];
253  unsigned ordered, t, entries, used_entries = 0;
254 
255  ff_dlog(NULL, " %u. Codebook\n", cb);
256 
257  if (get_bits(gb, 24) != 0x564342) {
259  " %u. Codebook setup data corrupt.\n", cb);
260  ret = AVERROR_INVALIDDATA;
261  goto error;
262  }
263 
264  codebook_setup->dimensions=get_bits(gb, 16);
265  if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
267  " %u. Codebook's dimension is invalid (%d).\n",
268  cb, codebook_setup->dimensions);
269  ret = AVERROR_INVALIDDATA;
270  goto error;
271  }
272  entries = get_bits(gb, 24);
273  if (entries > V_MAX_VLCS) {
275  " %u. Codebook has too many entries (%u).\n",
276  cb, entries);
277  ret = AVERROR_INVALIDDATA;
278  goto error;
279  }
280 
281  ordered = get_bits1(gb);
282 
283  ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
284  codebook_setup->dimensions, entries);
285 
286  if (!ordered) {
287  unsigned ce, flag;
288  unsigned sparse = get_bits1(gb);
289 
290  ff_dlog(NULL, " not ordered \n");
291 
292  if (sparse) {
293  ff_dlog(NULL, " sparse \n");
294 
295  used_entries = 0;
296  for (ce = 0; ce < entries; ++ce) {
297  flag = get_bits1(gb);
298  if (flag) {
299  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
300  ++used_entries;
301  } else
302  tmp_vlc_bits[ce] = 0;
303  }
304  } else {
305  ff_dlog(NULL, " not sparse \n");
306 
307  used_entries = entries;
308  for (ce = 0; ce < entries; ++ce)
309  tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
310  }
311  } else {
312  unsigned current_entry = 0;
313  unsigned current_length = get_bits(gb, 5) + 1;
314 
315  ff_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
316 
317  used_entries = entries;
318  for (; current_entry < used_entries && current_length <= 32; ++current_length) {
319  unsigned i, number;
320 
321  ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
322 
323  number = get_bits(gb, ilog(entries - current_entry));
324 
325  ff_dlog(NULL, " number: %u\n", number);
326 
327  for (i = current_entry; i < number+current_entry; ++i)
328  if (i < used_entries)
329  tmp_vlc_bits[i] = current_length;
330 
331  current_entry+=number;
332  }
333  if (current_entry>used_entries) {
334  av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
335  ret = AVERROR_INVALIDDATA;
336  goto error;
337  }
338  }
339 
340  codebook_setup->lookup_type = get_bits(gb, 4);
341 
342  ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
343  codebook_setup->lookup_type ? "vq" : "no lookup");
344 
345 // If the codebook is used for (inverse) VQ, calculate codevectors.
346 
347  if (codebook_setup->lookup_type == 1) {
348  unsigned i, j, k;
349  unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
350 
351  float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
352  float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
353  unsigned codebook_value_bits = get_bits(gb, 4) + 1;
354  unsigned codebook_sequence_p = get_bits1(gb);
355 
356  ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
357  codebook_lookup_values);
358  ff_dlog(NULL, " delta %f minmum %f \n",
359  codebook_delta_value, codebook_minimum_value);
360 
361  for (i = 0; i < codebook_lookup_values; ++i) {
362  codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
363 
364  ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
365  (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
366  ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
367  }
368 
369 // Weed out unused vlcs and build codevector vector
370  if (used_entries) {
371  codebook_setup->codevectors =
372  av_mallocz(used_entries * codebook_setup->dimensions *
373  sizeof(*codebook_setup->codevectors));
374  if (!codebook_setup->codevectors)
375  return AVERROR(ENOMEM);
376  } else
377  codebook_setup->codevectors = NULL;
378 
379  for (j = 0, i = 0; i < entries; ++i) {
380  unsigned dim = codebook_setup->dimensions;
381 
382  if (tmp_vlc_bits[i]) {
383  float last = 0.0;
384  unsigned lookup_offset = i;
385 
386  ff_dlog(vc->avctx, "Lookup offset %u ,", i);
387 
388  for (k = 0; k < dim; ++k) {
389  unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
390  codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
391  if (codebook_sequence_p)
392  last = codebook_setup->codevectors[j * dim + k];
393  lookup_offset/=codebook_lookup_values;
394  }
395  tmp_vlc_bits[j] = tmp_vlc_bits[i];
396 
397  ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
398  for (k = 0; k < dim; ++k)
399  ff_dlog(vc->avctx, " %f ",
400  codebook_setup->codevectors[j * dim + k]);
401  ff_dlog(vc->avctx, "\n");
402 
403  ++j;
404  }
405  }
406  if (j != used_entries) {
407  av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
408  ret = AVERROR_INVALIDDATA;
409  goto error;
410  }
411  entries = used_entries;
412  } else if (codebook_setup->lookup_type >= 2) {
413  av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
414  ret = AVERROR_INVALIDDATA;
415  goto error;
416  }
417 
418 // Initialize VLC table
419  if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
420  av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
421  ret = AVERROR_INVALIDDATA;
422  goto error;
423  }
424  codebook_setup->maxdepth = 0;
425  for (t = 0; t < entries; ++t)
426  if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
427  codebook_setup->maxdepth = tmp_vlc_bits[t];
428 
429  if (codebook_setup->maxdepth > 3 * V_NB_BITS)
430  codebook_setup->nb_bits = V_NB_BITS2;
431  else
432  codebook_setup->nb_bits = V_NB_BITS;
433 
434  codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
435 
436  if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
437  entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
438  sizeof(*tmp_vlc_bits), tmp_vlc_codes,
439  sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
440  INIT_VLC_LE))) {
441  av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
442  goto error;
443  }
444  }
445 
446  av_free(tmp_vlc_bits);
447  av_free(tmp_vlc_codes);
448  av_free(codebook_multiplicands);
449  return 0;
450 
451 // Error:
452 error:
453  av_free(tmp_vlc_bits);
454  av_free(tmp_vlc_codes);
455  av_free(codebook_multiplicands);
456  return ret;
457 }
458 
459 // Process time domain transforms part (unused in Vorbis I)
460 
462 {
463  GetBitContext *gb = &vc->gb;
464  unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
465 
466  for (i = 0; i < vorbis_time_count; ++i) {
467  unsigned vorbis_tdtransform = get_bits(gb, 16);
468 
469  ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
470  vorbis_time_count, vorbis_tdtransform);
471 
472  if (vorbis_tdtransform) {
473  av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
474  return AVERROR_INVALIDDATA;
475  }
476  }
477  return 0;
478 }
479 
480 // Process floors part
481 
482 static int vorbis_floor0_decode(vorbis_context *vc,
483  vorbis_floor_data *vfu, float *vec);
484 static int create_map(vorbis_context *vc, unsigned floor_number);
485 static int vorbis_floor1_decode(vorbis_context *vc,
486  vorbis_floor_data *vfu, float *vec);
488 {
489  GetBitContext *gb = &vc->gb;
490  int i, j, k, ret;
491 
492  vc->floor_count = get_bits(gb, 6) + 1;
493 
494  vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
495  if (!vc->floors)
496  return AVERROR(ENOMEM);
497 
498  for (i = 0; i < vc->floor_count; ++i) {
499  vorbis_floor *floor_setup = &vc->floors[i];
500 
501  floor_setup->floor_type = get_bits(gb, 16);
502 
503  ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
504 
505  if (floor_setup->floor_type == 1) {
506  int maximum_class = -1;
507  unsigned rangebits, rangemax, floor1_values = 2;
508 
509  floor_setup->decode = vorbis_floor1_decode;
510 
511  floor_setup->data.t1.partitions = get_bits(gb, 5);
512 
513  ff_dlog(NULL, " %d.floor: %d partitions \n",
514  i, floor_setup->data.t1.partitions);
515 
516  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
517  floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
518  if (floor_setup->data.t1.partition_class[j] > maximum_class)
519  maximum_class = floor_setup->data.t1.partition_class[j];
520 
521  ff_dlog(NULL, " %d. floor %d partition class %d \n",
522  i, j, floor_setup->data.t1.partition_class[j]);
523 
524  }
525 
526  ff_dlog(NULL, " maximum class %d \n", maximum_class);
527 
528  for (j = 0; j <= maximum_class; ++j) {
529  floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
530  floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
531 
532  ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
533  floor_setup->data.t1.class_dimensions[j],
534  floor_setup->data.t1.class_subclasses[j]);
535 
536  if (floor_setup->data.t1.class_subclasses[j]) {
538 
539  ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
540  }
541 
542  for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
543  int16_t bits = get_bits(gb, 8) - 1;
544  if (bits != -1)
545  VALIDATE_INDEX(bits, vc->codebook_count)
546  floor_setup->data.t1.subclass_books[j][k] = bits;
547 
548  ff_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
549  }
550  }
551 
552  floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
553  floor_setup->data.t1.x_list_dim = 2;
554 
555  for (j = 0; j < floor_setup->data.t1.partitions; ++j)
556  floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
557 
558  floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
559  sizeof(*floor_setup->data.t1.list));
560  if (!floor_setup->data.t1.list)
561  return AVERROR(ENOMEM);
562 
563  rangebits = get_bits(gb, 4);
564  rangemax = (1 << rangebits);
565  if (rangemax > vc->blocksize[1] / 2) {
567  "Floor value is too large for blocksize: %u (%"PRIu32")\n",
568  rangemax, vc->blocksize[1] / 2);
569  return AVERROR_INVALIDDATA;
570  }
571  floor_setup->data.t1.list[0].x = 0;
572  floor_setup->data.t1.list[1].x = rangemax;
573 
574  for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
575  for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
576  floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
577 
578  ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
579  floor_setup->data.t1.list[floor1_values].x);
580  }
581  }
582 
583 // Precalculate order of x coordinates - needed for decode
585  floor_setup->data.t1.list,
586  floor_setup->data.t1.x_list_dim)) {
587  return AVERROR_INVALIDDATA;
588  }
589  } else if (floor_setup->floor_type == 0) {
590  unsigned max_codebook_dim = 0;
591 
592  floor_setup->decode = vorbis_floor0_decode;
593 
594  floor_setup->data.t0.order = get_bits(gb, 8);
595  if (!floor_setup->data.t0.order) {
596  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
597  return AVERROR_INVALIDDATA;
598  }
599  floor_setup->data.t0.rate = get_bits(gb, 16);
600  if (!floor_setup->data.t0.rate) {
601  av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
602  return AVERROR_INVALIDDATA;
603  }
604  floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
605  if (!floor_setup->data.t0.bark_map_size) {
607  "Floor 0 bark map size is 0.\n");
608  return AVERROR_INVALIDDATA;
609  }
610  floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
611  floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
612  floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
613 
614  /* allocate mem for booklist */
615  floor_setup->data.t0.book_list =
616  av_malloc(floor_setup->data.t0.num_books);
617  if (!floor_setup->data.t0.book_list)
618  return AVERROR(ENOMEM);
619  /* read book indexes */
620  {
621  int idx;
622  unsigned book_idx;
623  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
624  GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
625  floor_setup->data.t0.book_list[idx] = book_idx;
626  if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
627  max_codebook_dim = vc->codebooks[book_idx].dimensions;
628  }
629  }
630 
631  if ((ret = create_map(vc, i)) < 0)
632  return ret;
633 
634  /* codebook dim is for padding if codebook dim doesn't *
635  * divide order+1 then we need to read more data */
636  floor_setup->data.t0.lsp =
637  av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
638  * sizeof(*floor_setup->data.t0.lsp));
639  if (!floor_setup->data.t0.lsp)
640  return AVERROR(ENOMEM);
641 
642  /* debug output parsed headers */
643  ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
644  ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
645  ff_dlog(NULL, "floor0 bark map size: %u\n",
646  floor_setup->data.t0.bark_map_size);
647  ff_dlog(NULL, "floor0 amplitude bits: %u\n",
648  floor_setup->data.t0.amplitude_bits);
649  ff_dlog(NULL, "floor0 amplitude offset: %u\n",
650  floor_setup->data.t0.amplitude_offset);
651  ff_dlog(NULL, "floor0 number of books: %u\n",
652  floor_setup->data.t0.num_books);
653  ff_dlog(NULL, "floor0 book list pointer: %p\n",
654  floor_setup->data.t0.book_list);
655  {
656  int idx;
657  for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
658  ff_dlog(NULL, " Book %d: %u\n", idx + 1,
659  floor_setup->data.t0.book_list[idx]);
660  }
661  }
662  } else {
663  av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
664  return AVERROR_INVALIDDATA;
665  }
666  }
667  return 0;
668 }
669 
670 // Process residues part
671 
673 {
674  GetBitContext *gb = &vc->gb;
675  unsigned i, j, k;
676 
677  vc->residue_count = get_bits(gb, 6)+1;
678  vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
679  if (!vc->residues)
680  return AVERROR(ENOMEM);
681 
682  ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
683 
684  for (i = 0; i < vc->residue_count; ++i) {
685  vorbis_residue *res_setup = &vc->residues[i];
686  uint8_t cascade[64];
687  unsigned high_bits, low_bits;
688 
689  res_setup->type = get_bits(gb, 16);
690 
691  ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
692 
693  res_setup->begin = get_bits(gb, 24);
694  res_setup->end = get_bits(gb, 24);
695  res_setup->partition_size = get_bits(gb, 24) + 1;
696  /* Validations to prevent a buffer overflow later. */
697  if (res_setup->begin>res_setup->end ||
698  res_setup->end > (res_setup->type == 2 ? vc->avctx->channels : 1) * vc->blocksize[1] / 2 ||
699  (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
701  "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
702  res_setup->type, res_setup->begin, res_setup->end,
703  res_setup->partition_size, vc->blocksize[1] / 2);
704  return AVERROR_INVALIDDATA;
705  }
706 
707  res_setup->classifications = get_bits(gb, 6) + 1;
708  GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
709 
710  res_setup->ptns_to_read =
711  (res_setup->end - res_setup->begin) / res_setup->partition_size;
712  res_setup->classifs = av_malloc(res_setup->ptns_to_read *
713  vc->audio_channels *
714  sizeof(*res_setup->classifs));
715  if (!res_setup->classifs)
716  return AVERROR(ENOMEM);
717 
718  ff_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
719  res_setup->begin, res_setup->end, res_setup->partition_size,
720  res_setup->classifications, res_setup->classbook);
721 
722  for (j = 0; j < res_setup->classifications; ++j) {
723  high_bits = 0;
724  low_bits = get_bits(gb, 3);
725  if (get_bits1(gb))
726  high_bits = get_bits(gb, 5);
727  cascade[j] = (high_bits << 3) + low_bits;
728 
729  ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
730  }
731 
732  res_setup->maxpass = 0;
733  for (j = 0; j < res_setup->classifications; ++j) {
734  for (k = 0; k < 8; ++k) {
735  if (cascade[j]&(1 << k)) {
736  GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
737 
738  ff_dlog(NULL, " %u class cascade depth %u book: %d\n",
739  j, k, res_setup->books[j][k]);
740 
741  if (k>res_setup->maxpass)
742  res_setup->maxpass = k;
743  } else {
744  res_setup->books[j][k] = -1;
745  }
746  }
747  }
748  }
749  return 0;
750 }
751 
752 // Process mappings part
753 
755 {
756  GetBitContext *gb = &vc->gb;
757  unsigned i, j;
758 
759  vc->mapping_count = get_bits(gb, 6)+1;
760  vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
761  if (!vc->mappings)
762  return AVERROR(ENOMEM);
763 
764  ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
765 
766  for (i = 0; i < vc->mapping_count; ++i) {
767  vorbis_mapping *mapping_setup = &vc->mappings[i];
768 
769  if (get_bits(gb, 16)) {
770  av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
771  return AVERROR_INVALIDDATA;
772  }
773  if (get_bits1(gb)) {
774  mapping_setup->submaps = get_bits(gb, 4) + 1;
775  } else {
776  mapping_setup->submaps = 1;
777  }
778 
779  if (get_bits1(gb)) {
780  mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
781  mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
782  sizeof(*mapping_setup->magnitude));
783  mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
784  sizeof(*mapping_setup->angle));
785  if (!mapping_setup->angle || !mapping_setup->magnitude)
786  return AVERROR(ENOMEM);
787 
788  for (j = 0; j < mapping_setup->coupling_steps; ++j) {
789  GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
790  GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
791  }
792  } else {
793  mapping_setup->coupling_steps = 0;
794  }
795 
796  ff_dlog(NULL, " %u mapping coupling steps: %d\n",
797  i, mapping_setup->coupling_steps);
798 
799  if (get_bits(gb, 2)) {
800  av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
801  return AVERROR_INVALIDDATA; // following spec.
802  }
803 
804  if (mapping_setup->submaps>1) {
805  mapping_setup->mux = av_mallocz(vc->audio_channels *
806  sizeof(*mapping_setup->mux));
807  if (!mapping_setup->mux)
808  return AVERROR(ENOMEM);
809 
810  for (j = 0; j < vc->audio_channels; ++j)
811  mapping_setup->mux[j] = get_bits(gb, 4);
812  }
813 
814  for (j = 0; j < mapping_setup->submaps; ++j) {
815  skip_bits(gb, 8); // FIXME check?
816  GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
817  GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
818 
819  ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
820  mapping_setup->submap_floor[j],
821  mapping_setup->submap_residue[j]);
822  }
823  }
824  return 0;
825 }
826 
827 // Process modes part
828 
829 static int create_map(vorbis_context *vc, unsigned floor_number)
830 {
831  vorbis_floor *floors = vc->floors;
832  vorbis_floor0 *vf;
833  int idx;
834  int blockflag, n;
835  int32_t *map;
836 
837  for (blockflag = 0; blockflag < 2; ++blockflag) {
838  n = vc->blocksize[blockflag] / 2;
839  floors[floor_number].data.t0.map[blockflag] =
840  av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
841  if (!floors[floor_number].data.t0.map[blockflag])
842  return AVERROR(ENOMEM);
843 
844  map = floors[floor_number].data.t0.map[blockflag];
845  vf = &floors[floor_number].data.t0;
846 
847  for (idx = 0; idx < n; ++idx) {
848  map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
849  (vf->bark_map_size / BARK(vf->rate / 2.0f)));
850  if (vf->bark_map_size-1 < map[idx])
851  map[idx] = vf->bark_map_size - 1;
852  }
853  map[n] = -1;
854  vf->map_size[blockflag] = n;
855  }
856 
857  for (idx = 0; idx <= n; ++idx) {
858  ff_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
859  }
860 
861  return 0;
862 }
863 
865 {
866  GetBitContext *gb = &vc->gb;
867  unsigned i;
868 
869  vc->mode_count = get_bits(gb, 6) + 1;
870  vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
871  if (!vc->modes)
872  return AVERROR(ENOMEM);
873 
874  ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
875 
876  for (i = 0; i < vc->mode_count; ++i) {
877  vorbis_mode *mode_setup = &vc->modes[i];
878 
879  mode_setup->blockflag = get_bits1(gb);
880  mode_setup->windowtype = get_bits(gb, 16); //FIXME check
881  mode_setup->transformtype = get_bits(gb, 16); //FIXME check
882  GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
883 
884  ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
885  i, mode_setup->blockflag, mode_setup->windowtype,
886  mode_setup->transformtype, mode_setup->mapping);
887  }
888  return 0;
889 }
890 
891 // Process the whole setup header using the functions above
892 
894 {
895  GetBitContext *gb = &vc->gb;
896  int ret;
897 
898  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
899  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
900  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
901  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
902  return AVERROR_INVALIDDATA;
903  }
904 
905  if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
906  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
907  return ret;
908  }
909  if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
910  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
911  return ret;
912  }
913  if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
914  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
915  return ret;
916  }
917  if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
918  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
919  return ret;
920  }
921  if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
922  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
923  return ret;
924  }
925  if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
926  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
927  return ret;
928  }
929  if (!get_bits1(gb)) {
930  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
931  return AVERROR_INVALIDDATA; // framing flag bit unset error
932  }
933 
934  return 0;
935 }
936 
937 // Process the identification header
938 
940 {
941  GetBitContext *gb = &vc->gb;
942  unsigned bl0, bl1;
943 
944  if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
945  (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
946  (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
947  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
948  return AVERROR_INVALIDDATA;
949  }
950 
951  vc->version = get_bits_long(gb, 32); //FIXME check 0
952  vc->audio_channels = get_bits(gb, 8);
953  if (vc->audio_channels <= 0) {
954  av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
955  return AVERROR_INVALIDDATA;
956  }
957  vc->audio_samplerate = get_bits_long(gb, 32);
958  if (vc->audio_samplerate <= 0) {
959  av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
960  return AVERROR_INVALIDDATA;
961  }
962  vc->bitrate_maximum = get_bits_long(gb, 32);
963  vc->bitrate_nominal = get_bits_long(gb, 32);
964  vc->bitrate_minimum = get_bits_long(gb, 32);
965  bl0 = get_bits(gb, 4);
966  bl1 = get_bits(gb, 4);
967  vc->blocksize[0] = (1 << bl0);
968  vc->blocksize[1] = (1 << bl1);
969  if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
970  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
971  return AVERROR_INVALIDDATA;
972  }
973  vc->win[0] = ff_vorbis_vwin[bl0 - 6];
974  vc->win[1] = ff_vorbis_vwin[bl1 - 6];
975 
976  if ((get_bits1(gb)) == 0) {
977  av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
978  return AVERROR_INVALIDDATA;
979  }
980 
981  vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
982  vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
983  if (!vc->channel_residues || !vc->saved)
984  return AVERROR(ENOMEM);
985 
986  vc->previous_window = 0;
987 
988  ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
989  ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
990 
991  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 ",
993 
994 /*
995  BLK = vc->blocksize[0];
996  for (i = 0; i < BLK / 2; ++i) {
997  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)));
998  }
999 */
1000 
1001  return 0;
1002 }
1003 
1004 // Process the extradata using the functions above (identification header, setup header)
1005 
1007 {
1008  vorbis_context *vc = avctx->priv_data;
1009  uint8_t *headers = avctx->extradata;
1010  int headers_len = avctx->extradata_size;
1011  uint8_t *header_start[3];
1012  int header_len[3];
1013  GetBitContext *gb = &vc->gb;
1014  int hdr_type, ret;
1015 
1016  vc->avctx = avctx;
1017  ff_vorbisdsp_init(&vc->dsp);
1019 
1020  avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1021 
1022  if (!headers_len) {
1023  av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1024  return AVERROR_INVALIDDATA;
1025  }
1026 
1027  if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1028  av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1029  return ret;
1030  }
1031 
1032  init_get_bits(gb, header_start[0], header_len[0]*8);
1033  hdr_type = get_bits(gb, 8);
1034  if (hdr_type != 1) {
1035  av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1036  return AVERROR_INVALIDDATA;
1037  }
1038  if ((ret = vorbis_parse_id_hdr(vc))) {
1039  av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1040  vorbis_free(vc);
1041  return ret;
1042  }
1043 
1044  init_get_bits(gb, header_start[2], header_len[2]*8);
1045  hdr_type = get_bits(gb, 8);
1046  if (hdr_type != 5) {
1047  av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1048  vorbis_free(vc);
1049  return AVERROR_INVALIDDATA;
1050  }
1051  if ((ret = vorbis_parse_setup_hdr(vc))) {
1052  av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1053  vorbis_free(vc);
1054  return ret;
1055  }
1056 
1057  if (vc->audio_channels > 8)
1058  avctx->channel_layout = 0;
1059  else
1061 
1062  avctx->channels = vc->audio_channels;
1063  avctx->sample_rate = vc->audio_samplerate;
1064 
1065  return 0;
1066 }
1067 
1068 // Decode audiopackets -------------------------------------------------
1069 
1070 // Read and decode floor
1071 
1073  vorbis_floor_data *vfu, float *vec)
1074 {
1075  vorbis_floor0 *vf = &vfu->t0;
1076  float *lsp = vf->lsp;
1077  unsigned amplitude, book_idx;
1078  unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1079 
1080  if (!vf->amplitude_bits)
1081  return 1;
1082 
1083  amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1084  if (amplitude > 0) {
1085  float last = 0;
1086  unsigned idx, lsp_len = 0;
1087  vorbis_codebook codebook;
1088 
1089  book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1090  if (book_idx >= vf->num_books) {
1091  av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1092  book_idx = 0;
1093  }
1094  ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1095  codebook = vc->codebooks[vf->book_list[book_idx]];
1096  /* Invalid codebook! */
1097  if (!codebook.codevectors)
1098  return AVERROR_INVALIDDATA;
1099 
1100  while (lsp_len<vf->order) {
1101  int vec_off;
1102 
1103  ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1104  ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1105  /* read temp vector */
1106  vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1107  codebook.nb_bits, codebook.maxdepth)
1108  * codebook.dimensions;
1109  ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1110  /* copy each vector component and add last to it */
1111  for (idx = 0; idx < codebook.dimensions; ++idx)
1112  lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1113  last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1114 
1115  lsp_len += codebook.dimensions;
1116  }
1117  /* DEBUG: output lsp coeffs */
1118  {
1119  int idx;
1120  for (idx = 0; idx < lsp_len; ++idx)
1121  ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1122  }
1123 
1124  /* synthesize floor output vector */
1125  {
1126  int i;
1127  int order = vf->order;
1128  float wstep = M_PI / vf->bark_map_size;
1129 
1130  for (i = 0; i < order; i++)
1131  lsp[i] = 2.0f * cos(lsp[i]);
1132 
1133  ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1134  vf->map_size[blockflag], order, wstep);
1135 
1136  i = 0;
1137  while (i < vf->map_size[blockflag]) {
1138  int j, iter_cond = vf->map[blockflag][i];
1139  float p = 0.5f;
1140  float q = 0.5f;
1141  float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1142 
1143  /* similar part for the q and p products */
1144  for (j = 0; j + 1 < order; j += 2) {
1145  q *= lsp[j] - two_cos_w;
1146  p *= lsp[j + 1] - two_cos_w;
1147  }
1148  if (j == order) { // even order
1149  p *= p * (2.0f - two_cos_w);
1150  q *= q * (2.0f + two_cos_w);
1151  } else { // odd order
1152  q *= two_cos_w-lsp[j]; // one more time for q
1153 
1154  /* final step and square */
1155  p *= p * (4.f - two_cos_w * two_cos_w);
1156  q *= q;
1157  }
1158 
1159  /* calculate linear floor value */
1160  q = exp((((amplitude*vf->amplitude_offset) /
1161  (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1162  - vf->amplitude_offset) * .11512925f);
1163 
1164  /* fill vector */
1165  do {
1166  vec[i] = q; ++i;
1167  } while (vf->map[blockflag][i] == iter_cond);
1168  }
1169  }
1170  } else {
1171  /* this channel is unused */
1172  return 1;
1173  }
1174 
1175  ff_dlog(NULL, " Floor0 decoded\n");
1176 
1177  return 0;
1178 }
1179 
1181  vorbis_floor_data *vfu, float *vec)
1182 {
1183  vorbis_floor1 *vf = &vfu->t1;
1184  GetBitContext *gb = &vc->gb;
1185  uint16_t range_v[4] = { 256, 128, 86, 64 };
1186  unsigned range = range_v[vf->multiplier - 1];
1187  uint16_t floor1_Y[258];
1188  uint16_t floor1_Y_final[258];
1189  int floor1_flag[258];
1190  unsigned class, cdim, cbits, csub, cval, offset, i, j;
1191  int book, adx, ady, dy, off, predicted, err;
1192 
1193 
1194  if (!get_bits1(gb)) // silence
1195  return 1;
1196 
1197 // Read values (or differences) for the floor's points
1198 
1199  floor1_Y[0] = get_bits(gb, ilog(range - 1));
1200  floor1_Y[1] = get_bits(gb, ilog(range - 1));
1201 
1202  ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1203 
1204  offset = 2;
1205  for (i = 0; i < vf->partitions; ++i) {
1206  class = vf->partition_class[i];
1207  cdim = vf->class_dimensions[class];
1208  cbits = vf->class_subclasses[class];
1209  csub = (1 << cbits) - 1;
1210  cval = 0;
1211 
1212  ff_dlog(NULL, "Cbits %u\n", cbits);
1213 
1214  if (cbits) // this reads all subclasses for this partition's class
1215  cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1216  vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1217 
1218  for (j = 0; j < cdim; ++j) {
1219  book = vf->subclass_books[class][cval & csub];
1220 
1221  ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1222  book, cbits, cval, get_bits_count(gb));
1223 
1224  cval = cval >> cbits;
1225  if (book > -1) {
1226  floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1227  vc->codebooks[book].nb_bits, 3);
1228  } else {
1229  floor1_Y[offset+j] = 0;
1230  }
1231 
1232  ff_dlog(NULL, " floor(%d) = %d \n",
1233  vf->list[offset+j].x, floor1_Y[offset+j]);
1234  }
1235  offset+=cdim;
1236  }
1237 
1238 // Amplitude calculation from the differences
1239 
1240  floor1_flag[0] = 1;
1241  floor1_flag[1] = 1;
1242  floor1_Y_final[0] = floor1_Y[0];
1243  floor1_Y_final[1] = floor1_Y[1];
1244 
1245  for (i = 2; i < vf->x_list_dim; ++i) {
1246  unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1247 
1248  low_neigh_offs = vf->list[i].low;
1249  high_neigh_offs = vf->list[i].high;
1250  dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1251  adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1252  ady = FFABS(dy);
1253  err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1254  off = err / adx;
1255  if (dy < 0) {
1256  predicted = floor1_Y_final[low_neigh_offs] - off;
1257  } else {
1258  predicted = floor1_Y_final[low_neigh_offs] + off;
1259  } // render_point end
1260 
1261  val = floor1_Y[i];
1262  highroom = range-predicted;
1263  lowroom = predicted;
1264  if (highroom < lowroom) {
1265  room = highroom * 2;
1266  } else {
1267  room = lowroom * 2; // SPEC misspelling
1268  }
1269  if (val) {
1270  floor1_flag[low_neigh_offs] = 1;
1271  floor1_flag[high_neigh_offs] = 1;
1272  floor1_flag[i] = 1;
1273  if (val >= room) {
1274  if (highroom > lowroom) {
1275  floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1276  } else {
1277  floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1278  }
1279  } else {
1280  if (val & 1) {
1281  floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1282  } else {
1283  floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1284  }
1285  }
1286  } else {
1287  floor1_flag[i] = 0;
1288  floor1_Y_final[i] = av_clip_uint16(predicted);
1289  }
1290 
1291  ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1292  vf->list[i].x, floor1_Y_final[i], val);
1293  }
1294 
1295 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1296 
1297  ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1298 
1299  ff_dlog(NULL, " Floor decoded\n");
1300 
1301  return 0;
1302 }
1303 
1305  vorbis_residue *vr,
1306  uint8_t *do_not_decode,
1307  unsigned ch_used,
1308  int partition_count)
1309 {
1310  vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1311  int p, j, i;
1312  unsigned c_p_c = codebook->dimensions;
1313  unsigned inverse_class = ff_inverse[vr->classifications];
1314  int temp, temp2;
1315  for (p = 0, j = 0; j < ch_used; ++j) {
1316  if (!do_not_decode[j]) {
1317  temp = get_vlc2(&vc->gb, codebook->vlc.table,
1318  codebook->nb_bits, 3);
1319 
1320  ff_dlog(NULL, "Classword: %u\n", temp);
1321 
1322  if (temp < 0) {
1323  av_log(vc->avctx, AV_LOG_ERROR,
1324  "Invalid vlc code decoding %d channel.", j);
1325  return AVERROR_INVALIDDATA;
1326  }
1327 
1328  for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1329  temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1330 
1331  if (i < vr->ptns_to_read)
1332  vr->classifs[p + i] = temp - temp2 * vr->classifications;
1333  temp = temp2;
1334  }
1335  }
1336  p += vr->ptns_to_read;
1337  }
1338  return 0;
1339 }
1340 // Read and decode residue
1341 
1343  vorbis_residue *vr,
1344  unsigned ch,
1345  uint8_t *do_not_decode,
1346  float *vec,
1347  unsigned vlen,
1348  unsigned ch_left,
1349  int vr_type)
1350 {
1351  GetBitContext *gb = &vc->gb;
1352  unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1353  uint8_t *classifs = vr->classifs;
1354  unsigned pass, ch_used, i, j, k, l;
1355  unsigned max_output = (ch - 1) * vlen;
1356  int ptns_to_read = vr->ptns_to_read;
1357 
1358  if (vr_type == 2) {
1359  for (j = 1; j < ch; ++j)
1360  do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1361  if (do_not_decode[0])
1362  return 0;
1363  ch_used = 1;
1364  max_output += vr->end / ch;
1365  } else {
1366  ch_used = ch;
1367  max_output += vr->end;
1368  }
1369 
1370  if (max_output > ch_left * vlen) {
1371  av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1372  return AVERROR_INVALIDDATA;
1373  }
1374 
1375  ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1376 
1377  for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1378  int voffset, partition_count, j_times_ptns_to_read;
1379 
1380  voffset = vr->begin;
1381  for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1382  if (!pass) {
1383  int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count);
1384  if (ret < 0)
1385  return ret;
1386  }
1387  for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1388  for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1389  unsigned voffs;
1390 
1391  if (!do_not_decode[j]) {
1392  unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1393  int vqbook = vr->books[vqclass][pass];
1394 
1395  if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1396  unsigned coffs;
1397  unsigned dim = vc->codebooks[vqbook].dimensions;
1398  unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1399  vorbis_codebook codebook = vc->codebooks[vqbook];
1400 
1401  if (vr_type == 0) {
1402 
1403  voffs = voffset+j*vlen;
1404  for (k = 0; k < step; ++k) {
1405  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1406  for (l = 0; l < dim; ++l)
1407  vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1408  }
1409  } else if (vr_type == 1) {
1410  voffs = voffset + j * vlen;
1411  for (k = 0; k < step; ++k) {
1412  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1413  for (l = 0; l < dim; ++l, ++voffs) {
1414  vec[voffs]+=codebook.codevectors[coffs+l];
1415 
1416  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1417  pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1418  }
1419  }
1420  } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1421  voffs = voffset >> 1;
1422 
1423  if (dim == 2) {
1424  for (k = 0; k < step; ++k) {
1425  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1426  vec[voffs + k ] += codebook.codevectors[coffs ];
1427  vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1428  }
1429  } else if (dim == 4) {
1430  for (k = 0; k < step; ++k, voffs += 2) {
1431  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1432  vec[voffs ] += codebook.codevectors[coffs ];
1433  vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1434  vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1435  vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1436  }
1437  } else
1438  for (k = 0; k < step; ++k) {
1439  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1440  for (l = 0; l < dim; l += 2, voffs++) {
1441  vec[voffs ] += codebook.codevectors[coffs + l ];
1442  vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1443 
1444  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1445  pass, voffset / ch + (voffs % ch) * vlen,
1446  vec[voffset / ch + (voffs % ch) * vlen],
1447  codebook.codevectors[coffs + l], coffs, l);
1448  }
1449  }
1450 
1451  } else if (vr_type == 2) {
1452  unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1453  unsigned voffs_mod = voffset - voffs_div * ch;
1454 
1455  for (k = 0; k < step; ++k) {
1456  coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1457  for (l = 0; l < dim; ++l) {
1458  vec[voffs_div + voffs_mod * vlen] +=
1459  codebook.codevectors[coffs + l];
1460 
1461  ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1462  pass, voffs_div + voffs_mod * vlen,
1463  vec[voffs_div + voffs_mod * vlen],
1464  codebook.codevectors[coffs + l], coffs, l);
1465 
1466  if (++voffs_mod == ch) {
1467  voffs_div++;
1468  voffs_mod = 0;
1469  }
1470  }
1471  }
1472  }
1473  }
1474  }
1475  j_times_ptns_to_read += ptns_to_read;
1476  }
1477  ++partition_count;
1478  voffset += vr->partition_size;
1479  }
1480  }
1481  }
1482  return 0;
1483 }
1484 
1486  unsigned ch,
1487  uint8_t *do_not_decode,
1488  float *vec, unsigned vlen,
1489  unsigned ch_left)
1490 {
1491  if (vr->type == 2)
1492  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1493  else if (vr->type == 1)
1494  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1495  else if (vr->type == 0)
1496  return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1497  else {
1498  av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1499  return AVERROR_INVALIDDATA;
1500  }
1501 }
1502 
1503 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1504 {
1505  int i;
1506  for (i = 0; i < blocksize; i++) {
1507  if (mag[i] > 0.0) {
1508  if (ang[i] > 0.0) {
1509  ang[i] = mag[i] - ang[i];
1510  } else {
1511  float temp = ang[i];
1512  ang[i] = mag[i];
1513  mag[i] += temp;
1514  }
1515  } else {
1516  if (ang[i] > 0.0) {
1517  ang[i] += mag[i];
1518  } else {
1519  float temp = ang[i];
1520  ang[i] = mag[i];
1521  mag[i] -= temp;
1522  }
1523  }
1524  }
1525 }
1526 
1527 // Decode the audio packet using the functions above
1528 
1529 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1530 {
1531  GetBitContext *gb = &vc->gb;
1532  FFTContext *mdct;
1533  unsigned previous_window = vc->previous_window;
1534  unsigned mode_number, blockflag, blocksize;
1535  int i, j;
1536  uint8_t no_residue[255];
1537  uint8_t do_not_decode[255];
1538  vorbis_mapping *mapping;
1539  float *ch_res_ptr = vc->channel_residues;
1540  uint8_t res_chan[255];
1541  unsigned res_num = 0;
1542  int retlen = 0;
1543  unsigned ch_left = vc->audio_channels;
1544  unsigned vlen;
1545 
1546  if (get_bits1(gb)) {
1547  av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1548  return AVERROR_INVALIDDATA; // packet type not audio
1549  }
1550 
1551  if (vc->mode_count == 1) {
1552  mode_number = 0;
1553  } else {
1554  GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1555  }
1556  vc->mode_number = mode_number;
1557  mapping = &vc->mappings[vc->modes[mode_number].mapping];
1558 
1559  ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1560  vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1561 
1562  blockflag = vc->modes[mode_number].blockflag;
1563  blocksize = vc->blocksize[blockflag];
1564  vlen = blocksize / 2;
1565  if (blockflag) {
1566  previous_window = get_bits(gb, 1);
1567  skip_bits1(gb); // next_window
1568  }
1569 
1570  memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1571  for (i = 0; i < vc->audio_channels; ++i)
1572  memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1573 
1574 // Decode floor
1575 
1576  for (i = 0; i < vc->audio_channels; ++i) {
1577  vorbis_floor *floor;
1578  int ret;
1579  if (mapping->submaps > 1) {
1580  floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1581  } else {
1582  floor = &vc->floors[mapping->submap_floor[0]];
1583  }
1584 
1585  ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1586 
1587  if (ret < 0) {
1588  av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1589  return AVERROR_INVALIDDATA;
1590  }
1591  no_residue[i] = ret;
1592  }
1593 
1594 // Nonzero vector propagate
1595 
1596  for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1597  if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1598  no_residue[mapping->magnitude[i]] = 0;
1599  no_residue[mapping->angle[i]] = 0;
1600  }
1601  }
1602 
1603 // Decode residue
1604 
1605  for (i = 0; i < mapping->submaps; ++i) {
1606  vorbis_residue *residue;
1607  unsigned ch = 0;
1608  int ret;
1609 
1610  for (j = 0; j < vc->audio_channels; ++j) {
1611  if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1612  res_chan[j] = res_num;
1613  if (no_residue[j]) {
1614  do_not_decode[ch] = 1;
1615  } else {
1616  do_not_decode[ch] = 0;
1617  }
1618  ++ch;
1619  ++res_num;
1620  }
1621  }
1622  residue = &vc->residues[mapping->submap_residue[i]];
1623  if (ch_left < ch) {
1624  av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1625  return AVERROR_INVALIDDATA;
1626  }
1627  if (ch) {
1628  ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1629  if (ret < 0)
1630  return ret;
1631  }
1632 
1633  ch_res_ptr += ch * vlen;
1634  ch_left -= ch;
1635  }
1636 
1637  if (ch_left > 0)
1638  return AVERROR_INVALIDDATA;
1639 
1640 // Inverse coupling
1641 
1642  for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1643  float *mag, *ang;
1644 
1645  mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1646  ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1647  vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1648  }
1649 
1650 // Dotproduct, MDCT
1651 
1652  mdct = &vc->mdct[blockflag];
1653 
1654  for (j = vc->audio_channels-1;j >= 0; j--) {
1655  ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1656  vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1657  mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1658  }
1659 
1660 // Overlap/add, save data for next overlapping
1661 
1662  retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1663  for (j = 0; j < vc->audio_channels; j++) {
1664  unsigned bs0 = vc->blocksize[0];
1665  unsigned bs1 = vc->blocksize[1];
1666  float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1667  float *saved = vc->saved + j * bs1 / 4;
1668  float *ret = floor_ptr[j];
1669  float *buf = residue;
1670  const float *win = vc->win[blockflag & previous_window];
1671 
1672  if (blockflag == previous_window) {
1673  vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1674  } else if (blockflag > previous_window) {
1675  vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1676  memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1677  } else {
1678  memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1679  vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1680  }
1681  memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1682  }
1683 
1684  vc->previous_window = blockflag;
1685  return retlen;
1686 }
1687 
1688 // Return the decoded audio packet through the standard api
1689 
1690 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1691  int *got_frame_ptr, AVPacket *avpkt)
1692 {
1693  const uint8_t *buf = avpkt->data;
1694  int buf_size = avpkt->size;
1695  vorbis_context *vc = avctx->priv_data;
1696  AVFrame *frame = data;
1697  GetBitContext *gb = &vc->gb;
1698  float *channel_ptrs[255];
1699  int i, len, ret;
1700 
1701  ff_dlog(NULL, "packet length %d \n", buf_size);
1702 
1703  /* get output buffer */
1704  frame->nb_samples = vc->blocksize[1] / 2;
1705  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
1706  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1707  return ret;
1708  }
1709 
1710  if (vc->audio_channels > 8) {
1711  for (i = 0; i < vc->audio_channels; i++)
1712  channel_ptrs[i] = (float *)frame->extended_data[i];
1713  } else {
1714  for (i = 0; i < vc->audio_channels; i++) {
1715  int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1716  channel_ptrs[ch] = (float *)frame->extended_data[i];
1717  }
1718  }
1719 
1720  init_get_bits(gb, buf, buf_size*8);
1721 
1722  if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1723  return len;
1724 
1725  if (!vc->first_frame) {
1726  vc->first_frame = 1;
1727  *got_frame_ptr = 0;
1728  av_frame_unref(frame);
1729  return buf_size;
1730  }
1731 
1732  ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1733  get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1734 
1735  frame->nb_samples = len;
1736  *got_frame_ptr = 1;
1737 
1738  return buf_size;
1739 }
1740 
1741 // Close decoder
1742 
1744 {
1745  vorbis_context *vc = avctx->priv_data;
1746 
1747  vorbis_free(vc);
1748 
1749  return 0;
1750 }
1751 
1753 {
1754  vorbis_context *vc = avctx->priv_data;
1755 
1756  if (vc->saved) {
1757  memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1758  sizeof(*vc->saved));
1759  }
1760  vc->previous_window = 0;
1761 }
1762 
1764  .name = "vorbis",
1765  .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1766  .type = AVMEDIA_TYPE_AUDIO,
1767  .id = AV_CODEC_ID_VORBIS,
1768  .priv_data_size = sizeof(vorbis_context),
1770  .close = vorbis_decode_close,
1773  .capabilities = AV_CODEC_CAP_DR1,
1774  .channel_layouts = ff_vorbis_channel_layouts,
1775  .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1777 };
float, planar
Definition: samplefmt.h:71
vorbis_codebook * codebooks
Definition: vorbisdec.c:137
void * av_malloc(size_t size)
Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...
Definition: mem.c:62
struct vorbis_floor1_s vorbis_floor1
Definition: vorbisdec.c:55
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:54
uint16_t windowtype
Definition: vorbisdec.c:115
unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n)
Definition: vorbis.c:34
const float * win[2]
Definition: vorbisdec.c:135
static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
Definition: vorbisdec.c:487
This structure describes decoded (raw) audio or video data.
Definition: frame.h:140
void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdec.c:1503
uint32_t version
Definition: vorbisdec.c:128
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:228
int(* vorbis_floor_decode_func)(struct vorbis_context_s *, vorbis_floor_data *, float *)
Definition: vorbisdec.c:59
static av_cold int vorbis_decode_close(AVCodecContext *avctx)
Definition: vorbisdec.c:1743
int size
Definition: avcodec.h:1347
int flag
Definition: cpu.c:35
av_log(ac->avr, AV_LOG_TRACE, "%d samples - audio_convert: %s to %s (%s)\, len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt), use_generic ? ac->func_descr_generic :ac->func_descr)
uint8_t dimensions
Definition: vorbisdec.c:45
unsigned partition_size
Definition: vorbisdec.c:94
AVCodecContext * avctx
Definition: vorbisdec.c:121
static const char idx_err_str[]
Definition: vorbisdec.c:157
#define ilog(i)
Definition: vorbis.h:48
#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: avcodec.h:3120
#define V_NB_BITS
Definition: vorbisdec.c:39
float * channel_residues
Definition: vorbisdec.c:148
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:1342
uint32_t audio_samplerate
Definition: vorbisdec.c:130
vorbis_mode * modes
Definition: vorbisdec.c:145
void av_freep(void *arg)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...
Definition: mem.c:202
const uint32_t ff_inverse[257]
Definition: mathtables.c:25
uint8_t bits
Definition: crc.c:252
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2160
uint8_t
VorbisDSPContext dsp
Definition: vorbisdec.c:123
#define av_cold
Definition: attributes.h:66
uint8_t mapping
Definition: vorbisdec.c:117
uint8_t residue_count
Definition: vorbisdec.c:140
#define BARK(x)
Definition: vorbisdec.c:154
static int vorbis_floor0_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1072
void(* vector_fmul)(float *dst, const float *src0, const float *src1, int len)
Calculate the product of two vectors of floats and store the result in a vector of floats...
Definition: float_dsp.h:38
#define VALIDATE_INDEX(idx, limit)
Definition: vorbisdec.c:158
vorbis_residue * residues
Definition: vorbisdec.c:141
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1523
const char data[16]
Definition: mxf.c:70
uint8_t * mux
Definition: vorbisdec.c:108
void(* vorbis_inverse_coupling)(float *mag, float *ang, intptr_t blocksize)
Definition: vorbisdsp.h:26
uint8_t * data
Definition: avcodec.h:1346
static int get_bits_count(const GetBitContext *s)
Definition: get_bits.h:182
unsigned int nb_bits
Definition: vorbisdec.c:50
uint8_t maxpass
Definition: vorbisdec.c:98
bitstream reader API header.
FFTContext mdct[2]
Definition: vorbisdec.c:126
#define V_NB_BITS2
Definition: vorbisdec.c:40
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
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:124
void av_free(void *ptr)
Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...
Definition: mem.c:190
uint16_t transformtype
Definition: vorbisdec.c:116
uint8_t classbook
Definition: vorbisdec.c:96
#define AVERROR(e)
Definition: error.h:43
static int create_map(vorbis_context *vc, unsigned floor_number)
Definition: vorbisdec.c:829
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:148
av_cold void ff_vorbisdsp_init(VorbisDSPContext *dsp)
Definition: vorbisdsp.c:24
uint8_t mode_number
Definition: vorbisdec.c:146
uint16_t x
Definition: vorbis.h:33
static int vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec)
Definition: vorbisdec.c:1180
uint16_t ptns_to_read
Definition: vorbisdec.c:99
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1503
const char * name
Name of the codec implementation.
Definition: avcodec.h:3127
AVCodec ff_vorbis_decoder
Definition: vorbisdec.c:1763
#define ff_mdct_init
Definition: fft.h:151
float * saved
Definition: vorbisdec.c:149
Definition: vlc.h:26
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2203
#define pass
Definition: fft_template.c:328
uint8_t floor_type
Definition: vorbisdec.c:61
union vorbis_floor_u vorbis_floor_data
Definition: vorbisdec.c:53
uint8_t first_frame
Definition: vorbisdec.c:127
float * codevectors
Definition: vorbisdec.c:49
static int vorbis_parse_id_hdr(vorbis_context *vc)
Definition: vorbisdec.c:939
Definition: fft.h:73
#define V_MAX_VLCS
Definition: vorbisdec.c:41
#define GET_VALIDATED_INDEX(idx, bits, limit)
Definition: vorbisdec.c:165
#define AV_CODEC_FLAG_BITEXACT
Use only bitexact stuff (except (I)DCT).
Definition: avcodec.h:788
union vorbis_floor::vorbis_floor_u data
static int decode(AVCodecContext *avctx, AVFrame *frame, int *got_frame, AVPacket *pkt)
Definition: avconv.c:1288
static void vorbis_free(vorbis_context *vc)
Definition: vorbisdec.c:183
int32_t
uint8_t blockflag
Definition: vorbisdec.c:114
int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, unsigned num)
Definition: vorbis.c:52
struct vorbis_floor0_s vorbis_floor0
Definition: vorbisdec.c:54
#define FFABS(a)
Definition: common.h:61
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:493
uint32_t blocksize[2]
Definition: vorbisdec.c:134
#define L(x)
Definition: vp56_arith.h:36
uint8_t submap_floor[16]
Definition: vorbisdec.c:109
uint16_t coupling_steps
Definition: vorbisdec.c:105
#define INIT_VLC_LE
Definition: vlc.h:54
if(ac->has_optimized_func)
uint8_t submap_residue[16]
Definition: vorbisdec.c:110
static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
Definition: vorbisdec.c:672
static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
Definition: vorbisdec.c:754
NULL
Definition: eval.c:55
Libavcodec external API header.
#define ff_dlog(ctx,...)
Definition: internal.h:60
AVSampleFormat
Audio Sample Formats.
Definition: samplefmt.h:60
static int vorbis_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: vorbisdec.c:1690
int sample_rate
samples per second
Definition: avcodec.h:2152
uint32_t bitrate_minimum
Definition: vorbisdec.c:133
uint16_t type
Definition: vorbisdec.c:91
uint8_t audio_channels
Definition: vorbisdec.c:129
main external API structure.
Definition: avcodec.h:1409
#define FASTDIV(a, b)
Definition: mathops.h:190
const uint64_t ff_vorbis_channel_layouts[9]
Definition: vorbis_data.c:47
uint8_t * magnitude
Definition: vorbisdec.c:106
uint8_t previous_window
Definition: vorbisdec.c:147
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:589
uint8_t maxdepth
Definition: vorbisdec.c:47
int extradata_size
Definition: avcodec.h:1524
uint8_t classifications
Definition: vorbisdec.c:95
static unsigned int get_bits1(GetBitContext *s)
Definition: get_bits.h:267
vorbis_mapping * mappings
Definition: vorbisdec.c:143
static void skip_bits1(GetBitContext *s)
Definition: get_bits.h:292
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:259
uint8_t mapping_count
Definition: vorbisdec.c:142
uint8_t floor_count
Definition: vorbisdec.c:138
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
Definition: get_bits.h:362
static int vorbis_parse_setup_hdr(vorbis_context *vc)
Definition: vorbisdec.c:893
int avpriv_split_xiph_headers(uint8_t *extradata, int extradata_size, int first_header_size, uint8_t *header_start[3], int header_len[3])
Split a single extradata buffer into the three headers that most Xiph codecs use. ...
Definition: xiph.c:24
int dim
const VDPAUPixFmtMap * map
static int step
Definition: avplay.c:247
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:300
uint32_t bitrate_nominal
Definition: vorbisdec.c:132
uint32_t bitrate_maximum
Definition: vorbisdec.c:131
void(* imdct_half)(struct FFTContext *s, FFTSample *output, const FFTSample *input)
Definition: fft.h:93
#define V_MAX_PARTITIONS
Definition: vorbisdec.c:42
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:302
uint8_t mode_count
Definition: vorbisdec.c:144
av_cold void avpriv_float_dsp_init(AVFloatDSPContext *fdsp, int bit_exact)
Initialize a float DSP context.
Definition: float_dsp.c:115
uint16_t codebook_count
Definition: vorbisdec.c:136
static float vorbisfloat2float(unsigned val)
Definition: vorbisdec.c:171
static av_cold int vorbis_decode_init(AVCodecContext *avctx)
Definition: vorbisdec.c:1006
uint8_t * classifs
Definition: vorbisdec.c:100
common internal api header.
struct vorbis_floor::vorbis_floor_u::vorbis_floor1_s t1
#define ff_mdct_end
Definition: fft.h:152
static av_cold void flush(AVCodecContext *avctx)
Flush (reset) the frame ID after seeking.
Definition: alsdec.c:1797
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:1485
static av_always_inline int setup_classifs(vorbis_context *vc, vorbis_residue *vr, uint8_t *do_not_decode, unsigned ch_used, int partition_count)
Definition: vorbisdec.c:1304
static av_cold int init(AVCodecParserContext *s)
Definition: h264_parser.c:582
GetBitContext gb
Definition: vorbisdec.c:122
vorbis_floor_decode_func decode
Definition: vorbisdec.c:62
void * priv_data
Definition: avcodec.h:1451
static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
Definition: vorbisdec.c:461
static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
Definition: vorbisdec.c:864
int len
uint8_t * angle
Definition: vorbisdec.c:107
int channels
number of audio channels
Definition: avcodec.h:2153
VLC_TYPE(* table)[2]
code, bits
Definition: vlc.h:28
uint32_t end
Definition: vorbisdec.c:93
int16_t books[64][8]
Definition: vorbisdec.c:97
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:187
uint8_t lookup_type
Definition: vorbisdec.c:46
static enum AVSampleFormat sample_fmts[]
Definition: adpcmenc.c:700
struct vorbis_floor::vorbis_floor_u::vorbis_floor0_s t0
#define av_always_inline
Definition: attributes.h:40
vorbis_floor * floors
Definition: vorbisdec.c:139
uint32_t begin
Definition: vorbisdec.c:92
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:174
static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
Definition: vorbisdec.c:1752
Definition: vorbis.h:32
AVFloatDSPContext fdsp
Definition: vorbisdec.c:124
This structure stores compressed data.
Definition: avcodec.h:1323
static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
Definition: vorbisdec.c:228
void ff_free_vlc(VLC *vlc)
Definition: bitstream.c:334
static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
Definition: vorbisdec.c:1529
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:184
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:211
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: avcodec.h:838
uint8_t submaps
Definition: vorbisdec.c:104
int ff_vorbis_ready_floor1_list(AVCodecContext *avctx, vorbis_floor1_entry *list, int values)
Definition: vorbis.c:97