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vorbis: Replace sized int_fast integer types with plain int/unsigned.
[libav.git] / libavcodec / vorbisdec.c
1 /**
2 * @file
3 * Vorbis I decoder
4 * @author Denes Balatoni ( dbalatoni programozo hu )
5 *
6 * This file is part of Libav.
7 *
8 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 #undef V_DEBUG
24 //#define V_DEBUG
25 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
26
27 #include <math.h>
28
29 #define ALT_BITSTREAM_READER_LE
30 #include "avcodec.h"
31 #include "get_bits.h"
32 #include "dsputil.h"
33 #include "fft.h"
34 #include "fmtconvert.h"
35
36 #include "vorbis.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 #ifndef V_DEBUG
45 #define AV_DEBUG(...)
46 #endif
47
48 #undef NDEBUG
49 #include <assert.h>
50
51 typedef struct {
52 uint_fast8_t dimensions;
53 uint_fast8_t lookup_type;
54 uint_fast8_t maxdepth;
55 VLC vlc;
56 float *codevectors;
57 unsigned int nb_bits;
58 } vorbis_codebook;
59
60 typedef union vorbis_floor_u vorbis_floor_data;
61 typedef struct vorbis_floor0_s vorbis_floor0;
62 typedef struct vorbis_floor1_s vorbis_floor1;
63 struct vorbis_context_s;
64 typedef
65 int (* vorbis_floor_decode_func)
66 (struct vorbis_context_s *, vorbis_floor_data *, float *);
67 typedef struct {
68 uint_fast8_t floor_type;
69 vorbis_floor_decode_func decode;
70 union vorbis_floor_u {
71 struct vorbis_floor0_s {
72 uint_fast8_t order;
73 uint_fast16_t rate;
74 uint_fast16_t bark_map_size;
75 int_fast32_t *map[2];
76 uint_fast32_t map_size[2];
77 uint_fast8_t amplitude_bits;
78 uint_fast8_t amplitude_offset;
79 uint_fast8_t num_books;
80 uint_fast8_t *book_list;
81 float *lsp;
82 } t0;
83 struct vorbis_floor1_s {
84 uint_fast8_t partitions;
85 uint8_t partition_class[32];
86 uint_fast8_t class_dimensions[16];
87 uint_fast8_t class_subclasses[16];
88 uint_fast8_t class_masterbook[16];
89 int_fast16_t subclass_books[16][8];
90 uint_fast8_t multiplier;
91 uint_fast16_t x_list_dim;
92 vorbis_floor1_entry *list;
93 } t1;
94 } data;
95 } vorbis_floor;
96
97 typedef struct {
98 uint_fast16_t type;
99 uint_fast32_t begin;
100 uint_fast32_t end;
101 unsigned partition_size;
102 uint_fast8_t classifications;
103 uint_fast8_t classbook;
104 int_fast16_t books[64][8];
105 uint_fast8_t maxpass;
106 uint_fast16_t ptns_to_read;
107 uint8_t *classifs;
108 } vorbis_residue;
109
110 typedef struct {
111 uint_fast8_t submaps;
112 uint_fast16_t coupling_steps;
113 uint_fast8_t *magnitude;
114 uint_fast8_t *angle;
115 uint_fast8_t *mux;
116 uint_fast8_t submap_floor[16];
117 uint_fast8_t submap_residue[16];
118 } vorbis_mapping;
119
120 typedef struct {
121 uint_fast8_t blockflag;
122 uint_fast16_t windowtype;
123 uint_fast16_t transformtype;
124 uint_fast8_t mapping;
125 } vorbis_mode;
126
127 typedef struct vorbis_context_s {
128 AVCodecContext *avccontext;
129 GetBitContext gb;
130 DSPContext dsp;
131 FmtConvertContext fmt_conv;
132
133 FFTContext mdct[2];
134 uint_fast8_t first_frame;
135 uint_fast32_t version;
136 uint_fast8_t audio_channels;
137 uint_fast32_t audio_samplerate;
138 uint_fast32_t bitrate_maximum;
139 uint_fast32_t bitrate_nominal;
140 uint_fast32_t bitrate_minimum;
141 uint_fast32_t blocksize[2];
142 const float *win[2];
143 uint_fast16_t codebook_count;
144 vorbis_codebook *codebooks;
145 uint_fast8_t floor_count;
146 vorbis_floor *floors;
147 uint_fast8_t residue_count;
148 vorbis_residue *residues;
149 uint_fast8_t mapping_count;
150 vorbis_mapping *mappings;
151 uint_fast8_t mode_count;
152 vorbis_mode *modes;
153 uint_fast8_t mode_number; // mode number for the current packet
154 uint_fast8_t previous_window;
155 float *channel_residues;
156 float *channel_floors;
157 float *saved;
158 float scale_bias; // for float->int conversion
159 } vorbis_context;
160
161 /* Helper functions */
162
163 #define BARK(x) \
164 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
165
166 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
167 #define VALIDATE_INDEX(idx, limit) \
168 if (idx >= limit) {\
169 av_log(vc->avccontext, AV_LOG_ERROR,\
170 idx_err_str,\
171 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
172 return -1;\
173 }
174 #define GET_VALIDATED_INDEX(idx, bits, limit) \
175 {\
176 idx = get_bits(gb, bits);\
177 VALIDATE_INDEX(idx, limit)\
178 }
179
180 static float vorbisfloat2float(unsigned val)
181 {
182 double mant = val & 0x1fffff;
183 long exp = (val & 0x7fe00000L) >> 21;
184 if (val & 0x80000000)
185 mant = -mant;
186 return ldexp(mant, exp - 20 - 768);
187 }
188
189
190 // Free all allocated memory -----------------------------------------
191
192 static void vorbis_free(vorbis_context *vc)
193 {
194 int i;
195
196 av_freep(&vc->channel_residues);
197 av_freep(&vc->channel_floors);
198 av_freep(&vc->saved);
199
200 for (i = 0; i < vc->residue_count; i++)
201 av_free(vc->residues[i].classifs);
202 av_freep(&vc->residues);
203 av_freep(&vc->modes);
204
205 ff_mdct_end(&vc->mdct[0]);
206 ff_mdct_end(&vc->mdct[1]);
207
208 for (i = 0; i < vc->codebook_count; ++i) {
209 av_free(vc->codebooks[i].codevectors);
210 free_vlc(&vc->codebooks[i].vlc);
211 }
212 av_freep(&vc->codebooks);
213
214 for (i = 0; i < vc->floor_count; ++i) {
215 if (vc->floors[i].floor_type == 0) {
216 av_free(vc->floors[i].data.t0.map[0]);
217 av_free(vc->floors[i].data.t0.map[1]);
218 av_free(vc->floors[i].data.t0.book_list);
219 av_free(vc->floors[i].data.t0.lsp);
220 } else {
221 av_free(vc->floors[i].data.t1.list);
222 }
223 }
224 av_freep(&vc->floors);
225
226 for (i = 0; i < vc->mapping_count; ++i) {
227 av_free(vc->mappings[i].magnitude);
228 av_free(vc->mappings[i].angle);
229 av_free(vc->mappings[i].mux);
230 }
231 av_freep(&vc->mappings);
232 }
233
234 // Parse setup header -------------------------------------------------
235
236 // Process codebooks part
237
238 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
239 {
240 unsigned cb;
241 uint8_t *tmp_vlc_bits;
242 uint32_t *tmp_vlc_codes;
243 GetBitContext *gb = &vc->gb;
244 uint_fast16_t *codebook_multiplicands;
245
246 vc->codebook_count = get_bits(gb, 8) + 1;
247
248 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
249
250 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
251 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
252 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
253 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
254
255 for (cb = 0; cb < vc->codebook_count; ++cb) {
256 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
257 unsigned ordered, t, entries, used_entries = 0;
258
259 AV_DEBUG(" %u. Codebook\n", cb);
260
261 if (get_bits(gb, 24) != 0x564342) {
262 av_log(vc->avccontext, AV_LOG_ERROR,
263 " %u. Codebook setup data corrupt.\n", cb);
264 goto error;
265 }
266
267 codebook_setup->dimensions=get_bits(gb, 16);
268 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
269 av_log(vc->avccontext, AV_LOG_ERROR,
270 " %u. Codebook's dimension is invalid (%d).\n",
271 cb, codebook_setup->dimensions);
272 goto error;
273 }
274 entries = get_bits(gb, 24);
275 if (entries > V_MAX_VLCS) {
276 av_log(vc->avccontext, AV_LOG_ERROR,
277 " %u. Codebook has too many entries (%u).\n",
278 cb, entries);
279 goto error;
280 }
281
282 ordered = get_bits1(gb);
283
284 AV_DEBUG(" codebook_dimensions %d, codebook_entries %u\n",
285 codebook_setup->dimensions, entries);
286
287 if (!ordered) {
288 unsigned ce, flag;
289 unsigned sparse = get_bits1(gb);
290
291 AV_DEBUG(" not ordered \n");
292
293 if (sparse) {
294 AV_DEBUG(" sparse \n");
295
296 used_entries = 0;
297 for (ce = 0; ce < entries; ++ce) {
298 flag = get_bits1(gb);
299 if (flag) {
300 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
301 ++used_entries;
302 } else
303 tmp_vlc_bits[ce] = 0;
304 }
305 } else {
306 AV_DEBUG(" not sparse \n");
307
308 used_entries = entries;
309 for (ce = 0; ce < entries; ++ce)
310 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
311 }
312 } else {
313 unsigned current_entry = 0;
314 unsigned current_length = get_bits(gb, 5) + 1;
315
316 AV_DEBUG(" ordered, current length: %u\n", current_length); //FIXME
317
318 used_entries = entries;
319 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
320 unsigned i, number;
321
322 AV_DEBUG(" number bits: %u ", ilog(entries - current_entry));
323
324 number = get_bits(gb, ilog(entries - current_entry));
325
326 AV_DEBUG(" number: %u\n", number);
327
328 for (i = current_entry; i < number+current_entry; ++i)
329 if (i < used_entries)
330 tmp_vlc_bits[i] = current_length;
331
332 current_entry+=number;
333 }
334 if (current_entry>used_entries) {
335 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
336 goto error;
337 }
338 }
339
340 codebook_setup->lookup_type = get_bits(gb, 4);
341
342 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup");
343
344 // If the codebook is used for (inverse) VQ, calculate codevectors.
345
346 if (codebook_setup->lookup_type == 1) {
347 unsigned i, j, k;
348 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
349
350 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
351 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
352 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
353 unsigned codebook_sequence_p = get_bits1(gb);
354
355 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
356 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
357
358 for (i = 0; i < codebook_lookup_values; ++i) {
359 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
360
361 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
362 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
363 }
364
365 // Weed out unused vlcs and build codevector vector
366 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
367 codebook_setup->dimensions *
368 sizeof(*codebook_setup->codevectors))
369 : NULL;
370 for (j = 0, i = 0; i < entries; ++i) {
371 unsigned dim = codebook_setup->dimensions;
372
373 if (tmp_vlc_bits[i]) {
374 float last = 0.0;
375 unsigned lookup_offset = i;
376
377 #ifdef V_DEBUG
378 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %u ,", i);
379 #endif
380
381 for (k = 0; k < dim; ++k) {
382 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
383 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
384 if (codebook_sequence_p)
385 last = codebook_setup->codevectors[j * dim + k];
386 lookup_offset/=codebook_lookup_values;
387 }
388 tmp_vlc_bits[j] = tmp_vlc_bits[i];
389
390 #ifdef V_DEBUG
391 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %u, vector: ", j);
392 for (k = 0; k < dim; ++k)
393 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j * dim + k]);
394 av_log(vc->avccontext, AV_LOG_INFO, "\n");
395 #endif
396
397 ++j;
398 }
399 }
400 if (j != used_entries) {
401 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
402 goto error;
403 }
404 entries = used_entries;
405 } else if (codebook_setup->lookup_type >= 2) {
406 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
407 goto error;
408 }
409
410 // Initialize VLC table
411 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
412 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
413 goto error;
414 }
415 codebook_setup->maxdepth = 0;
416 for (t = 0; t < entries; ++t)
417 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
418 codebook_setup->maxdepth = tmp_vlc_bits[t];
419
420 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
421 codebook_setup->nb_bits = V_NB_BITS2;
422 else
423 codebook_setup->nb_bits = V_NB_BITS;
424
425 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
426
427 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
428 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
429 goto error;
430 }
431 }
432
433 av_free(tmp_vlc_bits);
434 av_free(tmp_vlc_codes);
435 av_free(codebook_multiplicands);
436 return 0;
437
438 // Error:
439 error:
440 av_free(tmp_vlc_bits);
441 av_free(tmp_vlc_codes);
442 av_free(codebook_multiplicands);
443 return -1;
444 }
445
446 // Process time domain transforms part (unused in Vorbis I)
447
448 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
449 {
450 GetBitContext *gb = &vc->gb;
451 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
452
453 for (i = 0; i < vorbis_time_count; ++i) {
454 unsigned vorbis_tdtransform = get_bits(gb, 16);
455
456 AV_DEBUG(" Vorbis time domain transform %u: %u\n",
457 vorbis_time_count, vorbis_tdtransform);
458
459 if (vorbis_tdtransform) {
460 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
461 return -1;
462 }
463 }
464 return 0;
465 }
466
467 // Process floors part
468
469 static int vorbis_floor0_decode(vorbis_context *vc,
470 vorbis_floor_data *vfu, float *vec);
471 static void create_map(vorbis_context *vc, unsigned floor_number);
472 static int vorbis_floor1_decode(vorbis_context *vc,
473 vorbis_floor_data *vfu, float *vec);
474 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
475 {
476 GetBitContext *gb = &vc->gb;
477 int i,j,k;
478
479 vc->floor_count = get_bits(gb, 6) + 1;
480
481 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
482
483 for (i = 0; i < vc->floor_count; ++i) {
484 vorbis_floor *floor_setup = &vc->floors[i];
485
486 floor_setup->floor_type = get_bits(gb, 16);
487
488 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
489
490 if (floor_setup->floor_type == 1) {
491 int maximum_class = -1;
492 unsigned rangebits, rangemax, floor1_values = 2;
493
494 floor_setup->decode = vorbis_floor1_decode;
495
496 floor_setup->data.t1.partitions = get_bits(gb, 5);
497
498 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
499
500 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
501 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
502 if (floor_setup->data.t1.partition_class[j] > maximum_class)
503 maximum_class = floor_setup->data.t1.partition_class[j];
504
505 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
506
507 }
508
509 AV_DEBUG(" maximum class %d \n", maximum_class);
510
511 for (j = 0; j <= maximum_class; ++j) {
512 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
513 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
514
515 AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]);
516
517 if (floor_setup->data.t1.class_subclasses[j]) {
518 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
519
520 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
521 }
522
523 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
524 int16_t bits = get_bits(gb, 8) - 1;
525 if (bits != -1)
526 VALIDATE_INDEX(bits, vc->codebook_count)
527 floor_setup->data.t1.subclass_books[j][k] = bits;
528
529 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
530 }
531 }
532
533 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
534 floor_setup->data.t1.x_list_dim = 2;
535
536 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
537 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
538
539 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
540 sizeof(*floor_setup->data.t1.list));
541
542
543 rangebits = get_bits(gb, 4);
544 rangemax = (1 << rangebits);
545 if (rangemax > vc->blocksize[1] / 2) {
546 av_log(vc->avccontext, AV_LOG_ERROR,
547 "Floor value is too large for blocksize: %u (%"PRIuFAST32")\n",
548 rangemax, vc->blocksize[1] / 2);
549 return -1;
550 }
551 floor_setup->data.t1.list[0].x = 0;
552 floor_setup->data.t1.list[1].x = rangemax;
553
554 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
555 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
556 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
557
558 AV_DEBUG(" %u. floor1 Y coord. %d\n", floor1_values,
559 floor_setup->data.t1.list[floor1_values].x);
560 }
561 }
562
563 // Precalculate order of x coordinates - needed for decode
564 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
565 } else if (floor_setup->floor_type == 0) {
566 unsigned max_codebook_dim = 0;
567
568 floor_setup->decode = vorbis_floor0_decode;
569
570 floor_setup->data.t0.order = get_bits(gb, 8);
571 floor_setup->data.t0.rate = get_bits(gb, 16);
572 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
573 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
574 /* zero would result in a div by zero later *
575 * 2^0 - 1 == 0 */
576 if (floor_setup->data.t0.amplitude_bits == 0) {
577 av_log(vc->avccontext, AV_LOG_ERROR,
578 "Floor 0 amplitude bits is 0.\n");
579 return -1;
580 }
581 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
582 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
583
584 /* allocate mem for booklist */
585 floor_setup->data.t0.book_list =
586 av_malloc(floor_setup->data.t0.num_books);
587 if (!floor_setup->data.t0.book_list)
588 return -1;
589 /* read book indexes */
590 {
591 int idx;
592 unsigned book_idx;
593 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
594 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
595 floor_setup->data.t0.book_list[idx] = book_idx;
596 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
597 max_codebook_dim = vc->codebooks[book_idx].dimensions;
598 }
599 }
600
601 create_map(vc, i);
602
603 /* codebook dim is for padding if codebook dim doesn't *
604 * divide order+1 then we need to read more data */
605 floor_setup->data.t0.lsp =
606 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
607 * sizeof(*floor_setup->data.t0.lsp));
608 if (!floor_setup->data.t0.lsp)
609 return -1;
610
611 #ifdef V_DEBUG /* debug output parsed headers */
612 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
613 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
614 AV_DEBUG("floor0 bark map size: %u\n",
615 floor_setup->data.t0.bark_map_size);
616 AV_DEBUG("floor0 amplitude bits: %u\n",
617 floor_setup->data.t0.amplitude_bits);
618 AV_DEBUG("floor0 amplitude offset: %u\n",
619 floor_setup->data.t0.amplitude_offset);
620 AV_DEBUG("floor0 number of books: %u\n",
621 floor_setup->data.t0.num_books);
622 AV_DEBUG("floor0 book list pointer: %p\n",
623 floor_setup->data.t0.book_list);
624 {
625 int idx;
626 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
627 AV_DEBUG(" Book %d: %u\n",
628 idx+1,
629 floor_setup->data.t0.book_list[idx]);
630 }
631 }
632 #endif
633 } else {
634 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
635 return -1;
636 }
637 }
638 return 0;
639 }
640
641 // Process residues part
642
643 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
644 {
645 GetBitContext *gb = &vc->gb;
646 unsigned i, j, k;
647
648 vc->residue_count = get_bits(gb, 6)+1;
649 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
650
651 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
652
653 for (i = 0; i < vc->residue_count; ++i) {
654 vorbis_residue *res_setup = &vc->residues[i];
655 uint_fast8_t cascade[64];
656 unsigned high_bits, low_bits;
657
658 res_setup->type = get_bits(gb, 16);
659
660 AV_DEBUG(" %u. residue type %d\n", i, res_setup->type);
661
662 res_setup->begin = get_bits(gb, 24);
663 res_setup->end = get_bits(gb, 24);
664 res_setup->partition_size = get_bits(gb, 24) + 1;
665 /* Validations to prevent a buffer overflow later. */
666 if (res_setup->begin>res_setup->end ||
667 res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
668 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
669 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %u, %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1] / 2);
670 return -1;
671 }
672
673 res_setup->classifications = get_bits(gb, 6) + 1;
674 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
675
676 res_setup->ptns_to_read =
677 (res_setup->end - res_setup->begin) / res_setup->partition_size;
678 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
679 vc->audio_channels *
680 sizeof(*res_setup->classifs));
681 if (!res_setup->classifs)
682 return AVERROR(ENOMEM);
683
684 AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
685 res_setup->classifications, res_setup->classbook);
686
687 for (j = 0; j < res_setup->classifications; ++j) {
688 high_bits = 0;
689 low_bits = get_bits(gb, 3);
690 if (get_bits1(gb))
691 high_bits = get_bits(gb, 5);
692 cascade[j] = (high_bits << 3) + low_bits;
693
694 AV_DEBUG(" %u class cascade depth: %d\n", j, ilog(cascade[j]));
695 }
696
697 res_setup->maxpass = 0;
698 for (j = 0; j < res_setup->classifications; ++j) {
699 for (k = 0; k < 8; ++k) {
700 if (cascade[j]&(1 << k)) {
701 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
702
703 AV_DEBUG(" %u class cascade depth %u book: %d\n",
704 j, k, res_setup->books[j][k]);
705
706 if (k>res_setup->maxpass)
707 res_setup->maxpass = k;
708 } else {
709 res_setup->books[j][k] = -1;
710 }
711 }
712 }
713 }
714 return 0;
715 }
716
717 // Process mappings part
718
719 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
720 {
721 GetBitContext *gb = &vc->gb;
722 unsigned i, j;
723
724 vc->mapping_count = get_bits(gb, 6)+1;
725 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
726
727 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
728
729 for (i = 0; i < vc->mapping_count; ++i) {
730 vorbis_mapping *mapping_setup = &vc->mappings[i];
731
732 if (get_bits(gb, 16)) {
733 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
734 return -1;
735 }
736 if (get_bits1(gb)) {
737 mapping_setup->submaps = get_bits(gb, 4) + 1;
738 } else {
739 mapping_setup->submaps = 1;
740 }
741
742 if (get_bits1(gb)) {
743 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
744 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
745 sizeof(*mapping_setup->magnitude));
746 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
747 sizeof(*mapping_setup->angle));
748 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
749 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
750 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
751 }
752 } else {
753 mapping_setup->coupling_steps = 0;
754 }
755
756 AV_DEBUG(" %u mapping coupling steps: %d\n",
757 i, mapping_setup->coupling_steps);
758
759 if (get_bits(gb, 2)) {
760 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
761 return -1; // following spec.
762 }
763
764 if (mapping_setup->submaps>1) {
765 mapping_setup->mux = av_mallocz(vc->audio_channels *
766 sizeof(*mapping_setup->mux));
767 for (j = 0; j < vc->audio_channels; ++j)
768 mapping_setup->mux[j] = get_bits(gb, 4);
769 }
770
771 for (j = 0; j < mapping_setup->submaps; ++j) {
772 skip_bits(gb, 8); // FIXME check?
773 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
774 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
775
776 AV_DEBUG(" %u mapping %u submap : floor %d, residue %d\n",
777 i, j,
778 mapping_setup->submap_floor[j],
779 mapping_setup->submap_residue[j]);
780 }
781 }
782 return 0;
783 }
784
785 // Process modes part
786
787 static void create_map(vorbis_context *vc, unsigned floor_number)
788 {
789 vorbis_floor *floors = vc->floors;
790 vorbis_floor0 *vf;
791 int idx;
792 int blockflag, n;
793 int_fast32_t *map;
794
795 for (blockflag = 0; blockflag < 2; ++blockflag) {
796 n = vc->blocksize[blockflag] / 2;
797 floors[floor_number].data.t0.map[blockflag] =
798 av_malloc((n+1) * sizeof(int_fast32_t)); // n + sentinel
799
800 map = floors[floor_number].data.t0.map[blockflag];
801 vf = &floors[floor_number].data.t0;
802
803 for (idx = 0; idx < n; ++idx) {
804 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
805 ((vf->bark_map_size) /
806 BARK(vf->rate / 2.0f)));
807 if (vf->bark_map_size-1 < map[idx])
808 map[idx] = vf->bark_map_size - 1;
809 }
810 map[n] = -1;
811 vf->map_size[blockflag] = n;
812 }
813
814 #ifdef V_DEBUG
815 for (idx = 0; idx <= n; ++idx) {
816 AV_DEBUG("floor0 map: map at pos %d is %d\n",
817 idx, map[idx]);
818 }
819 #endif
820 }
821
822 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
823 {
824 GetBitContext *gb = &vc->gb;
825 unsigned i;
826
827 vc->mode_count = get_bits(gb, 6) + 1;
828 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
829
830 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
831
832 for (i = 0; i < vc->mode_count; ++i) {
833 vorbis_mode *mode_setup = &vc->modes[i];
834
835 mode_setup->blockflag = get_bits1(gb);
836 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
837 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
838 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
839
840 AV_DEBUG(" %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
841 i, mode_setup->blockflag, mode_setup->windowtype,
842 mode_setup->transformtype, mode_setup->mapping);
843 }
844 return 0;
845 }
846
847 // Process the whole setup header using the functions above
848
849 static int vorbis_parse_setup_hdr(vorbis_context *vc)
850 {
851 GetBitContext *gb = &vc->gb;
852
853 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
854 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
855 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
856 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
857 return -1;
858 }
859
860 if (vorbis_parse_setup_hdr_codebooks(vc)) {
861 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
862 return -2;
863 }
864 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
865 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
866 return -3;
867 }
868 if (vorbis_parse_setup_hdr_floors(vc)) {
869 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
870 return -4;
871 }
872 if (vorbis_parse_setup_hdr_residues(vc)) {
873 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
874 return -5;
875 }
876 if (vorbis_parse_setup_hdr_mappings(vc)) {
877 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
878 return -6;
879 }
880 if (vorbis_parse_setup_hdr_modes(vc)) {
881 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
882 return -7;
883 }
884 if (!get_bits1(gb)) {
885 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
886 return -8; // framing flag bit unset error
887 }
888
889 return 0;
890 }
891
892 // Process the identification header
893
894 static int vorbis_parse_id_hdr(vorbis_context *vc)
895 {
896 GetBitContext *gb = &vc->gb;
897 unsigned bl0, bl1;
898
899 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
900 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
901 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
902 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
903 return -1;
904 }
905
906 vc->version = get_bits_long(gb, 32); //FIXME check 0
907 vc->audio_channels = get_bits(gb, 8);
908 if (vc->audio_channels <= 0) {
909 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
910 return -1;
911 }
912 vc->audio_samplerate = get_bits_long(gb, 32);
913 if (vc->audio_samplerate <= 0) {
914 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
915 return -1;
916 }
917 vc->bitrate_maximum = get_bits_long(gb, 32);
918 vc->bitrate_nominal = get_bits_long(gb, 32);
919 vc->bitrate_minimum = get_bits_long(gb, 32);
920 bl0 = get_bits(gb, 4);
921 bl1 = get_bits(gb, 4);
922 vc->blocksize[0] = (1 << bl0);
923 vc->blocksize[1] = (1 << bl1);
924 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
925 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
926 return -3;
927 }
928 // output format int16
929 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
930 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
931 "output packets too large.\n");
932 return -4;
933 }
934 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
935 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
936
937 if ((get_bits1(gb)) == 0) {
938 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
939 return -2;
940 }
941
942 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
943 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
944 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
945 vc->previous_window = 0;
946
947 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
948 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
949
950 AV_DEBUG(" 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 ",
951 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
952
953 /*
954 BLK = vc->blocksize[0];
955 for (i = 0; i < BLK / 2; ++i) {
956 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)));
957 }
958 */
959
960 return 0;
961 }
962
963 // Process the extradata using the functions above (identification header, setup header)
964
965 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
966 {
967 vorbis_context *vc = avccontext->priv_data ;
968 uint8_t *headers = avccontext->extradata;
969 int headers_len = avccontext->extradata_size;
970 uint8_t *header_start[3];
971 int header_len[3];
972 GetBitContext *gb = &(vc->gb);
973 int hdr_type;
974
975 vc->avccontext = avccontext;
976 dsputil_init(&vc->dsp, avccontext);
977 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
978
979 vc->scale_bias = 32768.0f;
980
981 if (!headers_len) {
982 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
983 return -1;
984 }
985
986 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
987 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
988 return -1;
989 }
990
991 init_get_bits(gb, header_start[0], header_len[0]*8);
992 hdr_type = get_bits(gb, 8);
993 if (hdr_type != 1) {
994 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
995 return -1;
996 }
997 if (vorbis_parse_id_hdr(vc)) {
998 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
999 vorbis_free(vc);
1000 return -1;
1001 }
1002
1003 init_get_bits(gb, header_start[2], header_len[2]*8);
1004 hdr_type = get_bits(gb, 8);
1005 if (hdr_type != 5) {
1006 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1007 vorbis_free(vc);
1008 return -1;
1009 }
1010 if (vorbis_parse_setup_hdr(vc)) {
1011 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1012 vorbis_free(vc);
1013 return -1;
1014 }
1015
1016 if (vc->audio_channels > 8)
1017 avccontext->channel_layout = 0;
1018 else
1019 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1020
1021 avccontext->channels = vc->audio_channels;
1022 avccontext->sample_rate = vc->audio_samplerate;
1023 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1024 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
1025
1026 return 0 ;
1027 }
1028
1029 // Decode audiopackets -------------------------------------------------
1030
1031 // Read and decode floor
1032
1033 static int vorbis_floor0_decode(vorbis_context *vc,
1034 vorbis_floor_data *vfu, float *vec)
1035 {
1036 vorbis_floor0 *vf = &vfu->t0;
1037 float *lsp = vf->lsp;
1038 unsigned amplitude, book_idx;
1039 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1040
1041 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1042 if (amplitude > 0) {
1043 float last = 0;
1044 unsigned idx, lsp_len = 0;
1045 vorbis_codebook codebook;
1046
1047 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1048 if (book_idx >= vf->num_books) {
1049 av_log(vc->avccontext, AV_LOG_ERROR,
1050 "floor0 dec: booknumber too high!\n");
1051 book_idx = 0;
1052 }
1053 AV_DEBUG("floor0 dec: booknumber: %u\n", book_idx);
1054 codebook = vc->codebooks[vf->book_list[book_idx]];
1055 /* Invalid codebook! */
1056 if (!codebook.codevectors)
1057 return -1;
1058
1059 while (lsp_len<vf->order) {
1060 int vec_off;
1061
1062 AV_DEBUG("floor0 dec: book dimension: %d\n", codebook.dimensions);
1063 AV_DEBUG("floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1064 /* read temp vector */
1065 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1066 codebook.nb_bits, codebook.maxdepth)
1067 * codebook.dimensions;
1068 AV_DEBUG("floor0 dec: vector offset: %d\n", vec_off);
1069 /* copy each vector component and add last to it */
1070 for (idx = 0; idx < codebook.dimensions; ++idx)
1071 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1072 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1073
1074 lsp_len += codebook.dimensions;
1075 }
1076 #ifdef V_DEBUG
1077 /* DEBUG: output lsp coeffs */
1078 {
1079 int idx;
1080 for (idx = 0; idx < lsp_len; ++idx)
1081 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1082 }
1083 #endif
1084
1085 /* synthesize floor output vector */
1086 {
1087 int i;
1088 int order = vf->order;
1089 float wstep = M_PI / vf->bark_map_size;
1090
1091 for (i = 0; i < order; i++)
1092 lsp[i] = 2.0f * cos(lsp[i]);
1093
1094 AV_DEBUG("floor0 synth: map_size = %d; m = %d; wstep = %f\n",
1095 vf->map_size, order, wstep);
1096
1097 i = 0;
1098 while (i < vf->map_size[blockflag]) {
1099 int j, iter_cond = vf->map[blockflag][i];
1100 float p = 0.5f;
1101 float q = 0.5f;
1102 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1103
1104 /* similar part for the q and p products */
1105 for (j = 0; j + 1 < order; j += 2) {
1106 q *= lsp[j] - two_cos_w;
1107 p *= lsp[j + 1] - two_cos_w;
1108 }
1109 if (j == order) { // even order
1110 p *= p * (2.0f - two_cos_w);
1111 q *= q * (2.0f + two_cos_w);
1112 } else { // odd order
1113 q *= two_cos_w-lsp[j]; // one more time for q
1114
1115 /* final step and square */
1116 p *= p * (4.f - two_cos_w * two_cos_w);
1117 q *= q;
1118 }
1119
1120 /* calculate linear floor value */
1121 q = exp((((amplitude*vf->amplitude_offset) /
1122 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1123 - vf->amplitude_offset) * .11512925f);
1124
1125 /* fill vector */
1126 do {
1127 vec[i] = q; ++i;
1128 } while (vf->map[blockflag][i] == iter_cond);
1129 }
1130 }
1131 } else {
1132 /* this channel is unused */
1133 return 1;
1134 }
1135
1136 AV_DEBUG(" Floor0 decoded\n");
1137
1138 return 0;
1139 }
1140
1141 static int vorbis_floor1_decode(vorbis_context *vc,
1142 vorbis_floor_data *vfu, float *vec)
1143 {
1144 vorbis_floor1 *vf = &vfu->t1;
1145 GetBitContext *gb = &vc->gb;
1146 uint_fast16_t range_v[4] = { 256, 128, 86, 64 };
1147 unsigned range = range_v[vf->multiplier-1];
1148 uint_fast16_t floor1_Y[258];
1149 uint_fast16_t floor1_Y_final[258];
1150 int floor1_flag[258];
1151 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1152 int book, adx, ady, dy, off, predicted, err;
1153
1154
1155 if (!get_bits1(gb)) // silence
1156 return 1;
1157
1158 // Read values (or differences) for the floor's points
1159
1160 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1161 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1162
1163 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1164
1165 offset = 2;
1166 for (i = 0; i < vf->partitions; ++i) {
1167 class = vf->partition_class[i];
1168 cdim = vf->class_dimensions[class];
1169 cbits = vf->class_subclasses[class];
1170 csub = (1 << cbits) - 1;
1171 cval = 0;
1172
1173 AV_DEBUG("Cbits %u\n", cbits);
1174
1175 if (cbits) // this reads all subclasses for this partition's class
1176 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1177 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1178
1179 for (j = 0; j < cdim; ++j) {
1180 book = vf->subclass_books[class][cval & csub];
1181
1182 AV_DEBUG("book %d Cbits %u cval %u bits:%d\n",
1183 book, cbits, cval, get_bits_count(gb));
1184
1185 cval = cval >> cbits;
1186 if (book > -1) {
1187 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1188 vc->codebooks[book].nb_bits, 3);
1189 } else {
1190 floor1_Y[offset+j] = 0;
1191 }
1192
1193 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1194 }
1195 offset+=cdim;
1196 }
1197
1198 // Amplitude calculation from the differences
1199
1200 floor1_flag[0] = 1;
1201 floor1_flag[1] = 1;
1202 floor1_Y_final[0] = floor1_Y[0];
1203 floor1_Y_final[1] = floor1_Y[1];
1204
1205 for (i = 2; i < vf->x_list_dim; ++i) {
1206 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1207
1208 low_neigh_offs = vf->list[i].low;
1209 high_neigh_offs = vf->list[i].high;
1210 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1211 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1212 ady = FFABS(dy);
1213 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1214 off = err / adx;
1215 if (dy < 0) {
1216 predicted = floor1_Y_final[low_neigh_offs] - off;
1217 } else {
1218 predicted = floor1_Y_final[low_neigh_offs] + off;
1219 } // render_point end
1220
1221 val = floor1_Y[i];
1222 highroom = range-predicted;
1223 lowroom = predicted;
1224 if (highroom < lowroom) {
1225 room = highroom * 2;
1226 } else {
1227 room = lowroom * 2; // SPEC mispelling
1228 }
1229 if (val) {
1230 floor1_flag[low_neigh_offs] = 1;
1231 floor1_flag[high_neigh_offs] = 1;
1232 floor1_flag[i] = 1;
1233 if (val >= room) {
1234 if (highroom > lowroom) {
1235 floor1_Y_final[i] = val - lowroom + predicted;
1236 } else {
1237 floor1_Y_final[i] = predicted - val + highroom - 1;
1238 }
1239 } else {
1240 if (val & 1) {
1241 floor1_Y_final[i] = predicted - (val + 1) / 2;
1242 } else {
1243 floor1_Y_final[i] = predicted + val / 2;
1244 }
1245 }
1246 } else {
1247 floor1_flag[i] = 0;
1248 floor1_Y_final[i] = predicted;
1249 }
1250
1251 AV_DEBUG(" Decoded floor(%d) = %d / val %u\n",
1252 vf->list[i].x, floor1_Y_final[i], val);
1253 }
1254
1255 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1256
1257 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1258
1259 AV_DEBUG(" Floor decoded\n");
1260
1261 return 0;
1262 }
1263
1264 // Read and decode residue
1265
1266 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1267 vorbis_residue *vr,
1268 unsigned ch,
1269 uint_fast8_t *do_not_decode,
1270 float *vec,
1271 unsigned vlen,
1272 int vr_type)
1273 {
1274 GetBitContext *gb = &vc->gb;
1275 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1276 unsigned ptns_to_read = vr->ptns_to_read;
1277 uint8_t *classifs = vr->classifs;
1278 unsigned pass, ch_used, i, j, k, l;
1279
1280 if (vr_type == 2) {
1281 for (j = 1; j < ch; ++j)
1282 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1283 if (do_not_decode[0])
1284 return 0;
1285 ch_used = 1;
1286 } else {
1287 ch_used = ch;
1288 }
1289
1290 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1291
1292 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1293 uint16_t voffset, partition_count, j_times_ptns_to_read;
1294
1295 voffset = vr->begin;
1296 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1297 if (!pass) {
1298 unsigned inverse_class = ff_inverse[vr->classifications];
1299 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1300 if (!do_not_decode[j]) {
1301 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1302 vc->codebooks[vr->classbook].nb_bits, 3);
1303
1304 AV_DEBUG("Classword: %u\n", temp);
1305
1306 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1307 for (i = 0; i < c_p_c; ++i) {
1308 unsigned temp2;
1309
1310 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1311 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1312 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1313 temp = temp2;
1314 }
1315 }
1316 j_times_ptns_to_read += ptns_to_read;
1317 }
1318 }
1319 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1320 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1321 unsigned voffs;
1322
1323 if (!do_not_decode[j]) {
1324 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1325 int vqbook = vr->books[vqclass][pass];
1326
1327 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1328 unsigned coffs;
1329 unsigned dim = vc->codebooks[vqbook].dimensions;
1330 unsigned step = dim == 1 ? vr->partition_size
1331 : FASTDIV(vr->partition_size, dim);
1332 vorbis_codebook codebook = vc->codebooks[vqbook];
1333
1334 if (vr_type == 0) {
1335
1336 voffs = voffset+j*vlen;
1337 for (k = 0; k < step; ++k) {
1338 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1339 for (l = 0; l < dim; ++l)
1340 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1341 }
1342 } else if (vr_type == 1) {
1343 voffs = voffset + j * vlen;
1344 for (k = 0; k < step; ++k) {
1345 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1346 for (l = 0; l < dim; ++l, ++voffs) {
1347 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1348
1349 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1350 }
1351 }
1352 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1353 voffs = voffset >> 1;
1354
1355 if (dim == 2) {
1356 for (k = 0; k < step; ++k) {
1357 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1358 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1359 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1360 }
1361 } else if (dim == 4) {
1362 for (k = 0; k < step; ++k, voffs += 2) {
1363 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1364 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1365 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1366 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1367 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1368 }
1369 } else
1370 for (k = 0; k < step; ++k) {
1371 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1372 for (l = 0; l < dim; l += 2, voffs++) {
1373 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1374 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1375
1376 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset / ch + (voffs % ch) * vlen, vec[voffset / ch + (voffs % ch) * vlen], codebook.codevectors[coffs + l], coffs, l);
1377 }
1378 }
1379
1380 } else if (vr_type == 2) {
1381 voffs = voffset;
1382
1383 for (k = 0; k < step; ++k) {
1384 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1385 for (l = 0; l < dim; ++l, ++voffs) {
1386 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1387
1388 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset / ch + (voffs % ch) * vlen, vec[voffset / ch + (voffs % ch) * vlen], codebook.codevectors[coffs + l], coffs, l);
1389 }
1390 }
1391 }
1392 }
1393 }
1394 j_times_ptns_to_read += ptns_to_read;
1395 }
1396 ++partition_count;
1397 voffset += vr->partition_size;
1398 }
1399 }
1400 }
1401 return 0;
1402 }
1403
1404 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1405 unsigned ch,
1406 uint_fast8_t *do_not_decode,
1407 float *vec, unsigned vlen)
1408 {
1409 if (vr->type == 2)
1410 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1411 else if (vr->type == 1)
1412 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1413 else if (vr->type == 0)
1414 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1415 else {
1416 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1417 return -1;
1418 }
1419 }
1420
1421 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1422 {
1423 int i;
1424 for (i = 0; i < blocksize; i++) {
1425 if (mag[i] > 0.0) {
1426 if (ang[i] > 0.0) {
1427 ang[i] = mag[i] - ang[i];
1428 } else {
1429 float temp = ang[i];
1430 ang[i] = mag[i];
1431 mag[i] += temp;
1432 }
1433 } else {
1434 if (ang[i] > 0.0) {
1435 ang[i] += mag[i];
1436 } else {
1437 float temp = ang[i];
1438 ang[i] = mag[i];
1439 mag[i] -= temp;
1440 }
1441 }
1442 }
1443 }
1444
1445 // Decode the audio packet using the functions above
1446
1447 static int vorbis_parse_audio_packet(vorbis_context *vc)
1448 {
1449 GetBitContext *gb = &vc->gb;
1450 FFTContext *mdct;
1451 unsigned previous_window = vc->previous_window;
1452 unsigned mode_number, blockflag, blocksize;
1453 int i, j;
1454 uint_fast8_t no_residue[255];
1455 uint_fast8_t do_not_decode[255];
1456 vorbis_mapping *mapping;
1457 float *ch_res_ptr = vc->channel_residues;
1458 float *ch_floor_ptr = vc->channel_floors;
1459 uint_fast8_t res_chan[255];
1460 unsigned res_num = 0;
1461 int retlen = 0;
1462
1463 if (get_bits1(gb)) {
1464 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1465 return -1; // packet type not audio
1466 }
1467
1468 if (vc->mode_count == 1) {
1469 mode_number = 0;
1470 } else {
1471 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1472 }
1473 vc->mode_number = mode_number;
1474 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1475
1476 AV_DEBUG(" Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1477 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1478
1479 blockflag = vc->modes[mode_number].blockflag;
1480 blocksize = vc->blocksize[blockflag];
1481 if (blockflag)
1482 skip_bits(gb, 2); // previous_window, next_window
1483
1484 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1485 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1486
1487 // Decode floor
1488
1489 for (i = 0; i < vc->audio_channels; ++i) {
1490 vorbis_floor *floor;
1491 int ret;
1492 if (mapping->submaps > 1) {
1493 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1494 } else {
1495 floor = &vc->floors[mapping->submap_floor[0]];
1496 }
1497
1498 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1499
1500 if (ret < 0) {
1501 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1502 return -1;
1503 }
1504 no_residue[i] = ret;
1505 ch_floor_ptr += blocksize / 2;
1506 }
1507
1508 // Nonzero vector propagate
1509
1510 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1511 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1512 no_residue[mapping->magnitude[i]] = 0;
1513 no_residue[mapping->angle[i]] = 0;
1514 }
1515 }
1516
1517 // Decode residue
1518
1519 for (i = 0; i < mapping->submaps; ++i) {
1520 vorbis_residue *residue;
1521 unsigned ch = 0;
1522
1523 for (j = 0; j < vc->audio_channels; ++j) {
1524 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1525 res_chan[j] = res_num;
1526 if (no_residue[j]) {
1527 do_not_decode[ch] = 1;
1528 } else {
1529 do_not_decode[ch] = 0;
1530 }
1531 ++ch;
1532 ++res_num;
1533 }
1534 }
1535 residue = &vc->residues[mapping->submap_residue[i]];
1536 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1537
1538 ch_res_ptr += ch * blocksize / 2;
1539 }
1540
1541 // Inverse coupling
1542
1543 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1544 float *mag, *ang;
1545
1546 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1547 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1548 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1549 }
1550
1551 // Dotproduct, MDCT
1552
1553 mdct = &vc->mdct[blockflag];
1554
1555 for (j = vc->audio_channels-1;j >= 0; j--) {
1556 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1557 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1558 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1559 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1560 }
1561
1562 // Overlap/add, save data for next overlapping FPMATH
1563
1564 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1565 for (j = 0; j < vc->audio_channels; j++) {
1566 unsigned bs0 = vc->blocksize[0];
1567 unsigned bs1 = vc->blocksize[1];
1568 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1569 float *saved = vc->saved + j * bs1 / 4;
1570 float *ret = vc->channel_floors + j * retlen;
1571 float *buf = residue;
1572 const float *win = vc->win[blockflag & previous_window];
1573
1574 if (blockflag == previous_window) {
1575 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1576 } else if (blockflag > previous_window) {
1577 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1578 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1579 } else {
1580 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1581 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1582 }
1583 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1584 }
1585
1586 vc->previous_window = blockflag;
1587 return retlen;
1588 }
1589
1590 // Return the decoded audio packet through the standard api
1591
1592 static int vorbis_decode_frame(AVCodecContext *avccontext,
1593 void *data, int *data_size,
1594 AVPacket *avpkt)
1595 {
1596 const uint8_t *buf = avpkt->data;
1597 int buf_size = avpkt->size;
1598 vorbis_context *vc = avccontext->priv_data ;
1599 GetBitContext *gb = &(vc->gb);
1600 const float *channel_ptrs[255];
1601 int i, len;
1602
1603 if (!buf_size)
1604 return 0;
1605
1606 AV_DEBUG("packet length %d \n", buf_size);
1607
1608 init_get_bits(gb, buf, buf_size*8);
1609
1610 len = vorbis_parse_audio_packet(vc);
1611
1612 if (len <= 0) {
1613 *data_size = 0;
1614 return buf_size;
1615 }
1616
1617 if (!vc->first_frame) {
1618 vc->first_frame = 1;
1619 *data_size = 0;
1620 return buf_size ;
1621 }
1622
1623 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1624
1625 if (vc->audio_channels > 8) {
1626 for (i = 0; i < vc->audio_channels; i++)
1627 channel_ptrs[i] = vc->channel_floors + i * len;
1628 } else {
1629 for (i = 0; i < vc->audio_channels; i++)
1630 channel_ptrs[i] = vc->channel_floors +
1631 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1632 }
1633
1634 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1635 vc->audio_channels);
1636 *data_size = len * 2 * vc->audio_channels;
1637
1638 return buf_size ;
1639 }
1640
1641 // Close decoder
1642
1643 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1644 {
1645 vorbis_context *vc = avccontext->priv_data;
1646
1647 vorbis_free(vc);
1648
1649 return 0 ;
1650 }
1651
1652 AVCodec ff_vorbis_decoder = {
1653 "vorbis",
1654 AVMEDIA_TYPE_AUDIO,
1655 CODEC_ID_VORBIS,
1656 sizeof(vorbis_context),
1657 vorbis_decode_init,
1658 NULL,
1659 vorbis_decode_close,
1660 vorbis_decode_frame,
1661 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1662 .channel_layouts = ff_vorbis_channel_layouts,
1663 };
1664
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