1 /**
2 * @file
3 * Vorbis I decoder
4 * @author Denes Balatoni ( dbalatoni programozo hu )
5 *
6 * This file is part of FFmpeg.
7 *
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
12 *
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
17 *
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23 /**
24 * @file
25 * Vorbis I decoder
26 * @author Denes Balatoni ( dbalatoni programozo hu )
27 */
28
29 #include <inttypes.h>
30 #include <math.h>
31
32 #include "libavutil/avassert.h"
33 #include "libavutil/float_dsp.h"
34
35 #define BITSTREAM_READER_LE
36 #include "avcodec.h"
37 #include "codec_internal.h"
38 #include "fft.h"
39 #include "get_bits.h"
40 #include "internal.h"
41 #include "vorbis.h"
42 #include "vorbisdsp.h"
43 #include "xiph.h"
44
45 #define V_NB_BITS 8
46 #define V_NB_BITS2 11
47 #define V_MAX_VLCS (1 << 16)
48 #define V_MAX_PARTITIONS (1 << 20)
49
50 typedef struct vorbis_codebook {
51 uint8_t dimensions;
52 uint8_t lookup_type;
53 uint8_t maxdepth;
54 VLC vlc;
55 float *codevectors;
56 unsigned int nb_bits;
57 } vorbis_codebook;
58
59 typedef union vorbis_floor_u vorbis_floor_data;
60 typedef struct vorbis_floor0_s vorbis_floor0;
61 typedef struct vorbis_floor1_s vorbis_floor1;
62 struct vorbis_context_s;
63 typedef
64 int (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
66 typedef struct vorbis_floor {
67 uint8_t floor_type;
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
71 uint8_t order;
72 uint16_t rate;
73 uint16_t bark_map_size;
74 int32_t *map[2];
75 uint32_t map_size[2];
76 uint8_t amplitude_bits;
77 uint8_t amplitude_offset;
78 uint8_t num_books;
79 uint8_t *book_list;
80 float *lsp;
81 } t0;
82 struct vorbis_floor1_s {
83 uint8_t partitions;
84 uint8_t partition_class[32];
85 uint8_t class_dimensions[16];
86 uint8_t class_subclasses[16];
87 uint8_t class_masterbook[16];
88 int16_t subclass_books[16][8];
89 uint8_t multiplier;
90 uint16_t x_list_dim;
91 vorbis_floor1_entry *list;
92 } t1;
93 } data;
94 } vorbis_floor;
95
96 typedef struct vorbis_residue {
97 uint16_t type;
98 uint32_t begin;
99 uint32_t end;
100 unsigned partition_size;
101 uint8_t classifications;
102 uint8_t classbook;
103 int16_t books[64][8];
104 uint8_t maxpass;
105 uint16_t ptns_to_read;
106 uint8_t *classifs;
107 } vorbis_residue;
108
109 typedef struct vorbis_mapping {
110 uint8_t submaps;
111 uint16_t coupling_steps;
112 uint8_t *magnitude;
113 uint8_t *angle;
114 uint8_t *mux;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
117 } vorbis_mapping;
118
119 typedef struct vorbis_mode {
120 uint8_t blockflag;
121 uint16_t windowtype;
122 uint16_t transformtype;
123 uint8_t mapping;
124 } vorbis_mode;
125
126 typedef struct vorbis_context_s {
127 AVCodecContext *avctx;
128 GetBitContext gb;
129 VorbisDSPContext dsp;
130 AVFloatDSPContext *fdsp;
131
132 FFTContext mdct[2];
133 uint8_t first_frame;
134 uint32_t version;
135 uint8_t audio_channels;
136 uint32_t audio_samplerate;
137 uint32_t bitrate_maximum;
138 uint32_t bitrate_nominal;
139 uint32_t bitrate_minimum;
140 uint32_t blocksize[2];
141 const float *win[2];
142 uint16_t codebook_count;
143 vorbis_codebook *codebooks;
144 uint8_t floor_count;
145 vorbis_floor *floors;
146 uint8_t residue_count;
147 vorbis_residue *residues;
148 uint8_t mapping_count;
149 vorbis_mapping *mappings;
150 uint8_t mode_count;
151 vorbis_mode *modes;
152 uint8_t mode_number; // mode number for the current packet
153 int8_t previous_window;
154 float *channel_residues;
155 float *saved;
156 } vorbis_context;
157
158 /* Helper functions */
159
160 #define BARK(x) \
161 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
162
163 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
164 #define VALIDATE_INDEX(idx, limit) \
165 if (idx >= limit) {\
166 av_log(vc->avctx, AV_LOG_ERROR,\
167 idx_err_str,\
168 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
169 return AVERROR_INVALIDDATA;\
170 }
171 #define GET_VALIDATED_INDEX(idx, bits, limit) \
172 {\
173 idx = get_bits(gb, bits);\
174 VALIDATE_INDEX(idx, limit)\
175 }
176
vorbisfloat2float(unsigned val)177 static float vorbisfloat2float(unsigned val)
178 {
179 double mant = val & 0x1fffff;
180 long exp = (val & 0x7fe00000L) >> 21;
181 if (val & 0x80000000)
182 mant = -mant;
183 return ldexp(mant, exp - 20 - 768);
184 }
185
186
187 // Free all allocated memory -----------------------------------------
188
vorbis_free(vorbis_context * vc)189 static void vorbis_free(vorbis_context *vc)
190 {
191 int i;
192
193 av_freep(&vc->channel_residues);
194 av_freep(&vc->saved);
195 av_freep(&vc->fdsp);
196
197 if (vc->residues)
198 for (i = 0; i < vc->residue_count; i++)
199 av_freep(&vc->residues[i].classifs);
200 av_freep(&vc->residues);
201 av_freep(&vc->modes);
202
203 ff_mdct_end(&vc->mdct[0]);
204 ff_mdct_end(&vc->mdct[1]);
205
206 if (vc->codebooks)
207 for (i = 0; i < vc->codebook_count; ++i) {
208 av_freep(&vc->codebooks[i].codevectors);
209 ff_free_vlc(&vc->codebooks[i].vlc);
210 }
211 av_freep(&vc->codebooks);
212
213 if (vc->floors)
214 for (i = 0; i < vc->floor_count; ++i) {
215 if (vc->floors[i].floor_type == 0) {
216 av_freep(&vc->floors[i].data.t0.map[0]);
217 av_freep(&vc->floors[i].data.t0.map[1]);
218 av_freep(&vc->floors[i].data.t0.book_list);
219 av_freep(&vc->floors[i].data.t0.lsp);
220 } else {
221 av_freep(&vc->floors[i].data.t1.list);
222 }
223 }
224 av_freep(&vc->floors);
225
226 if (vc->mappings)
227 for (i = 0; i < vc->mapping_count; ++i) {
228 av_freep(&vc->mappings[i].magnitude);
229 av_freep(&vc->mappings[i].angle);
230 av_freep(&vc->mappings[i].mux);
231 }
232 av_freep(&vc->mappings);
233 }
234
235 // Parse setup header -------------------------------------------------
236
237 // Process codebooks part
238
vorbis_parse_setup_hdr_codebooks(vorbis_context * vc)239 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
240 {
241 unsigned cb;
242 uint8_t *tmp_vlc_bits = NULL;
243 uint32_t *tmp_vlc_codes = NULL;
244 GetBitContext *gb = &vc->gb;
245 uint16_t *codebook_multiplicands = NULL;
246 int ret = 0;
247
248 vc->codebook_count = get_bits(gb, 8) + 1;
249
250 ff_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
251
252 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
253 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
254 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
255 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
256 if (!vc->codebooks ||
257 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
258 ret = AVERROR(ENOMEM);
259 goto error;
260 }
261
262 for (cb = 0; cb < vc->codebook_count; ++cb) {
263 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
264 unsigned ordered, t, entries, used_entries = 0;
265
266 ff_dlog(NULL, " %u. Codebook\n", cb);
267
268 if (get_bits(gb, 24) != 0x564342) {
269 av_log(vc->avctx, AV_LOG_ERROR,
270 " %u. Codebook setup data corrupt.\n", cb);
271 ret = AVERROR_INVALIDDATA;
272 goto error;
273 }
274
275 codebook_setup->dimensions=get_bits(gb, 16);
276 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
277 av_log(vc->avctx, AV_LOG_ERROR,
278 " %u. Codebook's dimension is invalid (%d).\n",
279 cb, codebook_setup->dimensions);
280 ret = AVERROR_INVALIDDATA;
281 goto error;
282 }
283 entries = get_bits(gb, 24);
284 if (entries > V_MAX_VLCS) {
285 av_log(vc->avctx, AV_LOG_ERROR,
286 " %u. Codebook has too many entries (%u).\n",
287 cb, entries);
288 ret = AVERROR_INVALIDDATA;
289 goto error;
290 }
291
292 ordered = get_bits1(gb);
293
294 ff_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
295 codebook_setup->dimensions, entries);
296
297 if (!ordered) {
298 unsigned ce, flag;
299 unsigned sparse = get_bits1(gb);
300
301 ff_dlog(NULL, " not ordered \n");
302
303 if (sparse) {
304 ff_dlog(NULL, " sparse \n");
305
306 used_entries = 0;
307 for (ce = 0; ce < entries; ++ce) {
308 flag = get_bits1(gb);
309 if (flag) {
310 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
311 ++used_entries;
312 } else
313 tmp_vlc_bits[ce] = 0;
314 }
315 } else {
316 ff_dlog(NULL, " not sparse \n");
317
318 used_entries = entries;
319 for (ce = 0; ce < entries; ++ce)
320 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
321 }
322 } else {
323 unsigned current_entry = 0;
324 unsigned current_length = get_bits(gb, 5) + 1;
325
326 ff_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
327
328 used_entries = entries;
329 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
330 unsigned i, number;
331
332 ff_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
333
334 number = get_bits(gb, ilog(entries - current_entry));
335
336 ff_dlog(NULL, " number: %u\n", number);
337
338 for (i = current_entry; i < number+current_entry; ++i)
339 if (i < used_entries)
340 tmp_vlc_bits[i] = current_length;
341
342 current_entry+=number;
343 }
344 if (current_entry>used_entries) {
345 av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
346 ret = AVERROR_INVALIDDATA;
347 goto error;
348 }
349 }
350
351 codebook_setup->lookup_type = get_bits(gb, 4);
352
353 ff_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
354 codebook_setup->lookup_type ? "vq" : "no lookup");
355
356 // If the codebook is used for (inverse) VQ, calculate codevectors.
357
358 if (codebook_setup->lookup_type == 1) {
359 unsigned i, j, k;
360 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
361
362 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
363 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
364 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
365 unsigned codebook_sequence_p = get_bits1(gb);
366
367 if (!isfinite(codebook_minimum_value) || !isfinite(codebook_delta_value)) {
368 ret = AVERROR_INVALIDDATA;
369 goto error;
370 }
371 ff_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
372 codebook_lookup_values);
373 ff_dlog(NULL, " delta %f minmum %f \n",
374 codebook_delta_value, codebook_minimum_value);
375
376 for (i = 0; i < codebook_lookup_values; ++i) {
377 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
378
379 ff_dlog(NULL, " multiplicands*delta+minmum : %e \n",
380 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
381 ff_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
382 }
383
384 // Weed out unused vlcs and build codevector vector
385 if (used_entries) {
386 codebook_setup->codevectors =
387 av_calloc(used_entries, codebook_setup->dimensions *
388 sizeof(*codebook_setup->codevectors));
389 if (!codebook_setup->codevectors) {
390 ret = AVERROR(ENOMEM);
391 goto error;
392 }
393 } else
394 codebook_setup->codevectors = NULL;
395
396 for (j = 0, i = 0; i < entries; ++i) {
397 unsigned dim = codebook_setup->dimensions;
398
399 if (tmp_vlc_bits[i]) {
400 float last = 0.0;
401 unsigned lookup_offset = i;
402
403 ff_dlog(vc->avctx, "Lookup offset %u ,", i);
404
405 for (k = 0; k < dim; ++k) {
406 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
407 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
408 if (codebook_sequence_p)
409 last = codebook_setup->codevectors[j * dim + k];
410 lookup_offset/=codebook_lookup_values;
411 }
412 tmp_vlc_bits[j] = tmp_vlc_bits[i];
413
414 ff_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
415 for (k = 0; k < dim; ++k)
416 ff_dlog(vc->avctx, " %f ",
417 codebook_setup->codevectors[j * dim + k]);
418 ff_dlog(vc->avctx, "\n");
419
420 ++j;
421 }
422 }
423 if (j != used_entries) {
424 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
425 ret = AVERROR_INVALIDDATA;
426 goto error;
427 }
428 entries = used_entries;
429 } else if (codebook_setup->lookup_type >= 2) {
430 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
431 ret = AVERROR_INVALIDDATA;
432 goto error;
433 }
434
435 // Initialize VLC table
436 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
437 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
438 ret = AVERROR_INVALIDDATA;
439 goto error;
440 }
441 codebook_setup->maxdepth = 0;
442 for (t = 0; t < entries; ++t)
443 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
444 codebook_setup->maxdepth = tmp_vlc_bits[t];
445
446 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
447 codebook_setup->nb_bits = V_NB_BITS2;
448 else
449 codebook_setup->nb_bits = V_NB_BITS;
450
451 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
452
453 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
454 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
455 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
456 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
457 INIT_VLC_LE))) {
458 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
459 goto error;
460 }
461 }
462
463 av_free(tmp_vlc_bits);
464 av_free(tmp_vlc_codes);
465 av_free(codebook_multiplicands);
466 return 0;
467
468 // Error:
469 error:
470 av_free(tmp_vlc_bits);
471 av_free(tmp_vlc_codes);
472 av_free(codebook_multiplicands);
473 return ret;
474 }
475
476 // Process time domain transforms part (unused in Vorbis I)
477
vorbis_parse_setup_hdr_tdtransforms(vorbis_context * vc)478 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
479 {
480 GetBitContext *gb = &vc->gb;
481 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
482
483 for (i = 0; i < vorbis_time_count; ++i) {
484 unsigned vorbis_tdtransform = get_bits(gb, 16);
485
486 ff_dlog(NULL, " Vorbis time domain transform %u: %u\n",
487 vorbis_time_count, vorbis_tdtransform);
488
489 if (vorbis_tdtransform) {
490 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
491 return AVERROR_INVALIDDATA;
492 }
493 }
494 return 0;
495 }
496
497 // Process floors part
498
499 static int vorbis_floor0_decode(vorbis_context *vc,
500 vorbis_floor_data *vfu, float *vec);
501 static int create_map(vorbis_context *vc, unsigned floor_number);
502 static int vorbis_floor1_decode(vorbis_context *vc,
503 vorbis_floor_data *vfu, float *vec);
vorbis_parse_setup_hdr_floors(vorbis_context * vc)504 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
505 {
506 GetBitContext *gb = &vc->gb;
507 int i, j, k, ret;
508
509 vc->floor_count = get_bits(gb, 6) + 1;
510
511 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
512 if (!vc->floors)
513 return AVERROR(ENOMEM);
514
515 for (i = 0; i < vc->floor_count; ++i) {
516 vorbis_floor *floor_setup = &vc->floors[i];
517
518 floor_setup->floor_type = get_bits(gb, 16);
519
520 ff_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
521
522 if (floor_setup->floor_type == 1) {
523 int maximum_class = -1;
524 unsigned rangebits, rangemax, floor1_values = 2;
525
526 floor_setup->decode = vorbis_floor1_decode;
527
528 floor_setup->data.t1.partitions = get_bits(gb, 5);
529
530 ff_dlog(NULL, " %d.floor: %d partitions \n",
531 i, floor_setup->data.t1.partitions);
532
533 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
534 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
535 if (floor_setup->data.t1.partition_class[j] > maximum_class)
536 maximum_class = floor_setup->data.t1.partition_class[j];
537
538 ff_dlog(NULL, " %d. floor %d partition class %d \n",
539 i, j, floor_setup->data.t1.partition_class[j]);
540
541 }
542
543 ff_dlog(NULL, " maximum class %d \n", maximum_class);
544
545 for (j = 0; j <= maximum_class; ++j) {
546 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
547 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
548
549 ff_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
550 floor_setup->data.t1.class_dimensions[j],
551 floor_setup->data.t1.class_subclasses[j]);
552
553 if (floor_setup->data.t1.class_subclasses[j]) {
554 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
555
556 ff_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
557 }
558
559 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
560 int16_t bits = get_bits(gb, 8) - 1;
561 if (bits != -1)
562 VALIDATE_INDEX(bits, vc->codebook_count)
563 floor_setup->data.t1.subclass_books[j][k] = bits;
564
565 ff_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
566 }
567 }
568
569 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
570 floor_setup->data.t1.x_list_dim = 2;
571
572 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
573 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
574
575 floor_setup->data.t1.list = av_calloc(floor_setup->data.t1.x_list_dim,
576 sizeof(*floor_setup->data.t1.list));
577 if (!floor_setup->data.t1.list)
578 return AVERROR(ENOMEM);
579
580 rangebits = get_bits(gb, 4);
581 if (!rangebits && floor_setup->data.t1.partitions) {
582 av_log(vc->avctx, AV_LOG_ERROR,
583 "A rangebits value of 0 is not compliant with the Vorbis I specification.\n");
584 return AVERROR_INVALIDDATA;
585 }
586 rangemax = (1 << rangebits);
587 if (rangemax > vc->blocksize[1] / 2) {
588 av_log(vc->avctx, AV_LOG_ERROR,
589 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
590 rangemax, vc->blocksize[1] / 2);
591 return AVERROR_INVALIDDATA;
592 }
593 floor_setup->data.t1.list[0].x = 0;
594 floor_setup->data.t1.list[1].x = rangemax;
595
596 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
597 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
598 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
599
600 ff_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
601 floor_setup->data.t1.list[floor1_values].x);
602 }
603 }
604
605 // Precalculate order of x coordinates - needed for decode
606 if (ff_vorbis_ready_floor1_list(vc->avctx,
607 floor_setup->data.t1.list,
608 floor_setup->data.t1.x_list_dim)) {
609 return AVERROR_INVALIDDATA;
610 }
611 } else if (floor_setup->floor_type == 0) {
612 unsigned max_codebook_dim = 0;
613
614 floor_setup->decode = vorbis_floor0_decode;
615
616 floor_setup->data.t0.order = get_bits(gb, 8);
617 if (!floor_setup->data.t0.order) {
618 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
619 return AVERROR_INVALIDDATA;
620 }
621 floor_setup->data.t0.rate = get_bits(gb, 16);
622 if (!floor_setup->data.t0.rate) {
623 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
624 return AVERROR_INVALIDDATA;
625 }
626 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
627 if (!floor_setup->data.t0.bark_map_size) {
628 av_log(vc->avctx, AV_LOG_ERROR,
629 "Floor 0 bark map size is 0.\n");
630 return AVERROR_INVALIDDATA;
631 }
632 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
633 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
634 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
635
636 /* allocate mem for booklist */
637 floor_setup->data.t0.book_list =
638 av_malloc(floor_setup->data.t0.num_books);
639 if (!floor_setup->data.t0.book_list)
640 return AVERROR(ENOMEM);
641 /* read book indexes */
642 {
643 int idx;
644 unsigned book_idx;
645 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
646 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
647 floor_setup->data.t0.book_list[idx] = book_idx;
648 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
649 max_codebook_dim = vc->codebooks[book_idx].dimensions;
650 }
651 }
652
653 if ((ret = create_map(vc, i)) < 0)
654 return ret;
655
656 /* codebook dim is for padding if codebook dim doesn't *
657 * divide order+1 then we need to read more data */
658 floor_setup->data.t0.lsp =
659 av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
660 sizeof(*floor_setup->data.t0.lsp));
661 if (!floor_setup->data.t0.lsp)
662 return AVERROR(ENOMEM);
663
664 /* debug output parsed headers */
665 ff_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
666 ff_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
667 ff_dlog(NULL, "floor0 bark map size: %u\n",
668 floor_setup->data.t0.bark_map_size);
669 ff_dlog(NULL, "floor0 amplitude bits: %u\n",
670 floor_setup->data.t0.amplitude_bits);
671 ff_dlog(NULL, "floor0 amplitude offset: %u\n",
672 floor_setup->data.t0.amplitude_offset);
673 ff_dlog(NULL, "floor0 number of books: %u\n",
674 floor_setup->data.t0.num_books);
675 ff_dlog(NULL, "floor0 book list pointer: %p\n",
676 floor_setup->data.t0.book_list);
677 {
678 int idx;
679 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
680 ff_dlog(NULL, " Book %d: %u\n", idx + 1,
681 floor_setup->data.t0.book_list[idx]);
682 }
683 }
684 } else {
685 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
686 return AVERROR_INVALIDDATA;
687 }
688 }
689 return 0;
690 }
691
692 // Process residues part
693
vorbis_parse_setup_hdr_residues(vorbis_context * vc)694 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
695 {
696 GetBitContext *gb = &vc->gb;
697 unsigned i, j, k;
698
699 vc->residue_count = get_bits(gb, 6)+1;
700 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
701 if (!vc->residues)
702 return AVERROR(ENOMEM);
703
704 ff_dlog(NULL, " There are %d residues. \n", vc->residue_count);
705
706 for (i = 0; i < vc->residue_count; ++i) {
707 vorbis_residue *res_setup = &vc->residues[i];
708 uint8_t cascade[64];
709 unsigned high_bits, low_bits;
710
711 res_setup->type = get_bits(gb, 16);
712
713 ff_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
714
715 res_setup->begin = get_bits(gb, 24);
716 res_setup->end = get_bits(gb, 24);
717 res_setup->partition_size = get_bits(gb, 24) + 1;
718 /* Validations to prevent a buffer overflow later. */
719 if (res_setup->begin>res_setup->end ||
720 (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
721 av_log(vc->avctx, AV_LOG_ERROR,
722 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
723 res_setup->type, res_setup->begin, res_setup->end,
724 res_setup->partition_size, vc->blocksize[1] / 2);
725 return AVERROR_INVALIDDATA;
726 }
727
728 res_setup->classifications = get_bits(gb, 6) + 1;
729 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
730
731 res_setup->ptns_to_read =
732 (res_setup->end - res_setup->begin) / res_setup->partition_size;
733 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
734 vc->audio_channels *
735 sizeof(*res_setup->classifs));
736 if (!res_setup->classifs)
737 return AVERROR(ENOMEM);
738
739 ff_dlog(NULL, " begin %"PRIu32" end %"PRIu32" part.size %u classif.s %"PRIu8" classbook %"PRIu8"\n",
740 res_setup->begin, res_setup->end, res_setup->partition_size,
741 res_setup->classifications, res_setup->classbook);
742
743 for (j = 0; j < res_setup->classifications; ++j) {
744 high_bits = 0;
745 low_bits = get_bits(gb, 3);
746 if (get_bits1(gb))
747 high_bits = get_bits(gb, 5);
748 cascade[j] = (high_bits << 3) + low_bits;
749
750 ff_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
751 }
752
753 res_setup->maxpass = 0;
754 for (j = 0; j < res_setup->classifications; ++j) {
755 for (k = 0; k < 8; ++k) {
756 if (cascade[j]&(1 << k)) {
757 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
758
759 ff_dlog(NULL, " %u class cascade depth %u book: %d\n",
760 j, k, res_setup->books[j][k]);
761
762 if (k>res_setup->maxpass)
763 res_setup->maxpass = k;
764 } else {
765 res_setup->books[j][k] = -1;
766 }
767 }
768 }
769 }
770 return 0;
771 }
772
773 // Process mappings part
774
vorbis_parse_setup_hdr_mappings(vorbis_context * vc)775 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
776 {
777 GetBitContext *gb = &vc->gb;
778 unsigned i, j;
779
780 vc->mapping_count = get_bits(gb, 6)+1;
781 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
782 if (!vc->mappings)
783 return AVERROR(ENOMEM);
784
785 ff_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
786
787 for (i = 0; i < vc->mapping_count; ++i) {
788 vorbis_mapping *mapping_setup = &vc->mappings[i];
789
790 if (get_bits(gb, 16)) {
791 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
792 return AVERROR_INVALIDDATA;
793 }
794 if (get_bits1(gb)) {
795 mapping_setup->submaps = get_bits(gb, 4) + 1;
796 } else {
797 mapping_setup->submaps = 1;
798 }
799
800 if (get_bits1(gb)) {
801 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
802 if (vc->audio_channels < 2) {
803 av_log(vc->avctx, AV_LOG_ERROR,
804 "Square polar channel mapping with less than two channels is not compliant with the Vorbis I specification.\n");
805 return AVERROR_INVALIDDATA;
806 }
807 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
808 sizeof(*mapping_setup->magnitude));
809 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
810 sizeof(*mapping_setup->angle));
811 if (!mapping_setup->angle || !mapping_setup->magnitude)
812 return AVERROR(ENOMEM);
813
814 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
815 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
816 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
817 }
818 } else {
819 mapping_setup->coupling_steps = 0;
820 }
821
822 ff_dlog(NULL, " %u mapping coupling steps: %d\n",
823 i, mapping_setup->coupling_steps);
824
825 if (get_bits(gb, 2)) {
826 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
827 return AVERROR_INVALIDDATA; // following spec.
828 }
829
830 if (mapping_setup->submaps>1) {
831 mapping_setup->mux = av_calloc(vc->audio_channels,
832 sizeof(*mapping_setup->mux));
833 if (!mapping_setup->mux)
834 return AVERROR(ENOMEM);
835
836 for (j = 0; j < vc->audio_channels; ++j)
837 mapping_setup->mux[j] = get_bits(gb, 4);
838 }
839
840 for (j = 0; j < mapping_setup->submaps; ++j) {
841 skip_bits(gb, 8); // FIXME check?
842 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
843 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
844
845 ff_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
846 mapping_setup->submap_floor[j],
847 mapping_setup->submap_residue[j]);
848 }
849 }
850 return 0;
851 }
852
853 // Process modes part
854
create_map(vorbis_context * vc,unsigned floor_number)855 static int create_map(vorbis_context *vc, unsigned floor_number)
856 {
857 vorbis_floor *floors = vc->floors;
858 vorbis_floor0 *vf;
859 int idx;
860 int blockflag, n;
861 int32_t *map;
862
863 for (blockflag = 0; blockflag < 2; ++blockflag) {
864 n = vc->blocksize[blockflag] / 2;
865 floors[floor_number].data.t0.map[blockflag] =
866 av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
867 if (!floors[floor_number].data.t0.map[blockflag])
868 return AVERROR(ENOMEM);
869
870 map = floors[floor_number].data.t0.map[blockflag];
871 vf = &floors[floor_number].data.t0;
872
873 for (idx = 0; idx < n; ++idx) {
874 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
875 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
876 if (vf->bark_map_size-1 < map[idx])
877 map[idx] = vf->bark_map_size - 1;
878 }
879 map[n] = -1;
880 vf->map_size[blockflag] = n;
881 }
882
883 for (idx = 0; idx <= n; ++idx) {
884 ff_dlog(NULL, "floor0 map: map at pos %d is %"PRId32"\n", idx, map[idx]);
885 }
886
887 return 0;
888 }
889
vorbis_parse_setup_hdr_modes(vorbis_context * vc)890 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
891 {
892 GetBitContext *gb = &vc->gb;
893 unsigned i;
894
895 vc->mode_count = get_bits(gb, 6) + 1;
896 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
897 if (!vc->modes)
898 return AVERROR(ENOMEM);
899
900 ff_dlog(NULL, " There are %d modes.\n", vc->mode_count);
901
902 for (i = 0; i < vc->mode_count; ++i) {
903 vorbis_mode *mode_setup = &vc->modes[i];
904
905 mode_setup->blockflag = get_bits1(gb);
906 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
907 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
908 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
909
910 ff_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
911 i, mode_setup->blockflag, mode_setup->windowtype,
912 mode_setup->transformtype, mode_setup->mapping);
913 }
914 return 0;
915 }
916
917 // Process the whole setup header using the functions above
918
vorbis_parse_setup_hdr(vorbis_context * vc)919 static int vorbis_parse_setup_hdr(vorbis_context *vc)
920 {
921 GetBitContext *gb = &vc->gb;
922 int ret;
923
924 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
925 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
926 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
927 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
928 return AVERROR_INVALIDDATA;
929 }
930
931 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
932 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
933 return ret;
934 }
935 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
936 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
937 return ret;
938 }
939 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
940 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
941 return ret;
942 }
943 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
944 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
945 return ret;
946 }
947 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
948 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
949 return ret;
950 }
951 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
952 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
953 return ret;
954 }
955 if (!get_bits1(gb)) {
956 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
957 return AVERROR_INVALIDDATA; // framing flag bit unset error
958 }
959
960 return 0;
961 }
962
963 // Process the identification header
964
vorbis_parse_id_hdr(vorbis_context * vc)965 static int vorbis_parse_id_hdr(vorbis_context *vc)
966 {
967 GetBitContext *gb = &vc->gb;
968 unsigned bl0, bl1;
969
970 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
971 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
972 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
973 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
974 return AVERROR_INVALIDDATA;
975 }
976
977 vc->version = get_bits_long(gb, 32); //FIXME check 0
978 vc->audio_channels = get_bits(gb, 8);
979 if (vc->audio_channels <= 0) {
980 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
981 return AVERROR_INVALIDDATA;
982 }
983 vc->audio_samplerate = get_bits_long(gb, 32);
984 if (vc->audio_samplerate <= 0) {
985 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
986 return AVERROR_INVALIDDATA;
987 }
988 vc->bitrate_maximum = get_bits_long(gb, 32);
989 vc->bitrate_nominal = get_bits_long(gb, 32);
990 vc->bitrate_minimum = get_bits_long(gb, 32);
991 bl0 = get_bits(gb, 4);
992 bl1 = get_bits(gb, 4);
993 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
994 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
995 return AVERROR_INVALIDDATA;
996 }
997 vc->blocksize[0] = (1 << bl0);
998 vc->blocksize[1] = (1 << bl1);
999 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
1000 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
1001
1002 if ((get_bits1(gb)) == 0) {
1003 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1004 return AVERROR_INVALIDDATA;
1005 }
1006
1007 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
1008 vc->saved = av_calloc(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
1009 if (!vc->channel_residues || !vc->saved)
1010 return AVERROR(ENOMEM);
1011
1012 vc->previous_window = -1;
1013
1014 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
1015 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
1016 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & AV_CODEC_FLAG_BITEXACT);
1017 if (!vc->fdsp)
1018 return AVERROR(ENOMEM);
1019
1020 ff_dlog(NULL, " vorbis version %"PRIu32" \n audio_channels %"PRIu8" \n audio_samplerate %"PRIu32" \n bitrate_max %"PRIu32" \n bitrate_nom %"PRIu32" \n bitrate_min %"PRIu32" \n blk_0 %"PRIu32" blk_1 %"PRIu32" \n ",
1021 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1022
1023 /*
1024 BLK = vc->blocksize[0];
1025 for (i = 0; i < BLK / 2; ++i) {
1026 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)));
1027 }
1028 */
1029
1030 return 0;
1031 }
1032
1033 // Process the extradata using the functions above (identification header, setup header)
1034
vorbis_decode_init(AVCodecContext * avctx)1035 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1036 {
1037 vorbis_context *vc = avctx->priv_data;
1038 uint8_t *headers = avctx->extradata;
1039 int headers_len = avctx->extradata_size;
1040 const uint8_t *header_start[3];
1041 int header_len[3];
1042 GetBitContext *gb = &vc->gb;
1043 int hdr_type, ret;
1044
1045 vc->avctx = avctx;
1046 ff_vorbisdsp_init(&vc->dsp);
1047
1048 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1049
1050 if (!headers_len) {
1051 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1052 return AVERROR_INVALIDDATA;
1053 }
1054
1055 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1056 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1057 return ret;
1058 }
1059
1060 init_get_bits(gb, header_start[0], header_len[0]*8);
1061 hdr_type = get_bits(gb, 8);
1062 if (hdr_type != 1) {
1063 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1064 return AVERROR_INVALIDDATA;
1065 }
1066 if ((ret = vorbis_parse_id_hdr(vc))) {
1067 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1068 vorbis_free(vc);
1069 return ret;
1070 }
1071
1072 init_get_bits(gb, header_start[2], header_len[2]*8);
1073 hdr_type = get_bits(gb, 8);
1074 if (hdr_type != 5) {
1075 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1076 vorbis_free(vc);
1077 return AVERROR_INVALIDDATA;
1078 }
1079 if ((ret = vorbis_parse_setup_hdr(vc))) {
1080 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1081 vorbis_free(vc);
1082 return ret;
1083 }
1084
1085 av_channel_layout_uninit(&avctx->ch_layout);
1086 if (vc->audio_channels > 8) {
1087 avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1088 avctx->ch_layout.nb_channels = vc->audio_channels;
1089 } else {
1090 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1091 }
1092
1093 avctx->sample_rate = vc->audio_samplerate;
1094
1095 return 0;
1096 }
1097
1098 // Decode audiopackets -------------------------------------------------
1099
1100 // Read and decode floor
1101
vorbis_floor0_decode(vorbis_context * vc,vorbis_floor_data * vfu,float * vec)1102 static int vorbis_floor0_decode(vorbis_context *vc,
1103 vorbis_floor_data *vfu, float *vec)
1104 {
1105 vorbis_floor0 *vf = &vfu->t0;
1106 float *lsp = vf->lsp;
1107 unsigned book_idx;
1108 uint64_t amplitude;
1109 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1110
1111 if (!vf->amplitude_bits)
1112 return 1;
1113
1114 amplitude = get_bits64(&vc->gb, vf->amplitude_bits);
1115 if (amplitude > 0) {
1116 float last = 0;
1117 unsigned idx, lsp_len = 0;
1118 vorbis_codebook codebook;
1119
1120 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1121 if (book_idx >= vf->num_books) {
1122 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1123 book_idx = 0;
1124 }
1125 ff_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1126 codebook = vc->codebooks[vf->book_list[book_idx]];
1127 /* Invalid codebook! */
1128 if (!codebook.codevectors)
1129 return AVERROR_INVALIDDATA;
1130
1131 while (lsp_len<vf->order) {
1132 int vec_off;
1133
1134 ff_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1135 ff_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1136 /* read temp vector */
1137 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1138 codebook.nb_bits, codebook.maxdepth);
1139 if (vec_off < 0)
1140 return AVERROR_INVALIDDATA;
1141 vec_off *= codebook.dimensions;
1142 ff_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1143 /* copy each vector component and add last to it */
1144 for (idx = 0; idx < codebook.dimensions; ++idx)
1145 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1146 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1147
1148 lsp_len += codebook.dimensions;
1149 }
1150 /* DEBUG: output lsp coeffs */
1151 {
1152 int idx;
1153 for (idx = 0; idx < lsp_len; ++idx)
1154 ff_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1155 }
1156
1157 /* synthesize floor output vector */
1158 {
1159 int i;
1160 int order = vf->order;
1161 float wstep = M_PI / vf->bark_map_size;
1162
1163 for (i = 0; i < order; i++)
1164 lsp[i] = 2.0f * cos(lsp[i]);
1165
1166 ff_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1167 vf->map_size[blockflag], order, wstep);
1168
1169 i = 0;
1170 while (i < vf->map_size[blockflag]) {
1171 int j, iter_cond = vf->map[blockflag][i];
1172 float p = 0.5f;
1173 float q = 0.5f;
1174 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1175
1176 /* similar part for the q and p products */
1177 for (j = 0; j + 1 < order; j += 2) {
1178 q *= lsp[j] - two_cos_w;
1179 p *= lsp[j + 1] - two_cos_w;
1180 }
1181 if (j == order) { // even order
1182 p *= p * (2.0f - two_cos_w);
1183 q *= q * (2.0f + two_cos_w);
1184 } else { // odd order
1185 q *= two_cos_w-lsp[j]; // one more time for q
1186
1187 /* final step and square */
1188 p *= p * (4.f - two_cos_w * two_cos_w);
1189 q *= q;
1190 }
1191
1192 if (p + q == 0.0)
1193 return AVERROR_INVALIDDATA;
1194
1195 /* calculate linear floor value */
1196 q = exp((((amplitude*vf->amplitude_offset) /
1197 (((1ULL << vf->amplitude_bits) - 1) * sqrt(p + q)))
1198 - vf->amplitude_offset) * .11512925f);
1199
1200 /* fill vector */
1201 do {
1202 vec[i] = q; ++i;
1203 } while (vf->map[blockflag][i] == iter_cond);
1204 }
1205 }
1206 } else {
1207 /* this channel is unused */
1208 return 1;
1209 }
1210
1211 ff_dlog(NULL, " Floor0 decoded\n");
1212
1213 return 0;
1214 }
1215
vorbis_floor1_decode(vorbis_context * vc,vorbis_floor_data * vfu,float * vec)1216 static int vorbis_floor1_decode(vorbis_context *vc,
1217 vorbis_floor_data *vfu, float *vec)
1218 {
1219 vorbis_floor1 *vf = &vfu->t1;
1220 GetBitContext *gb = &vc->gb;
1221 uint16_t range_v[4] = { 256, 128, 86, 64 };
1222 unsigned range = range_v[vf->multiplier - 1];
1223 uint16_t floor1_Y[258];
1224 uint16_t floor1_Y_final[258];
1225 int floor1_flag[258];
1226 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1227 int book, adx, ady, dy, off, predicted, err;
1228
1229
1230 if (!get_bits1(gb)) // silence
1231 return 1;
1232
1233 // Read values (or differences) for the floor's points
1234
1235 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1236 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1237
1238 ff_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1239
1240 offset = 2;
1241 for (i = 0; i < vf->partitions; ++i) {
1242 partition_class = vf->partition_class[i];
1243 cdim = vf->class_dimensions[partition_class];
1244 cbits = vf->class_subclasses[partition_class];
1245 csub = (1 << cbits) - 1;
1246 cval = 0;
1247
1248 ff_dlog(NULL, "Cbits %u\n", cbits);
1249
1250 if (cbits) // this reads all subclasses for this partition's class
1251 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1252 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1253
1254 for (j = 0; j < cdim; ++j) {
1255 book = vf->subclass_books[partition_class][cval & csub];
1256
1257 ff_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1258 book, cbits, cval, get_bits_count(gb));
1259
1260 cval = cval >> cbits;
1261 if (book > -1) {
1262 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1263 vc->codebooks[book].nb_bits, 3);
1264 if (v < 0)
1265 return AVERROR_INVALIDDATA;
1266 floor1_Y[offset+j] = v;
1267 } else {
1268 floor1_Y[offset+j] = 0;
1269 }
1270
1271 ff_dlog(NULL, " floor(%d) = %d \n",
1272 vf->list[offset+j].x, floor1_Y[offset+j]);
1273 }
1274 offset+=cdim;
1275 }
1276
1277 // Amplitude calculation from the differences
1278
1279 floor1_flag[0] = 1;
1280 floor1_flag[1] = 1;
1281 floor1_Y_final[0] = floor1_Y[0];
1282 floor1_Y_final[1] = floor1_Y[1];
1283
1284 for (i = 2; i < vf->x_list_dim; ++i) {
1285 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1286
1287 low_neigh_offs = vf->list[i].low;
1288 high_neigh_offs = vf->list[i].high;
1289 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1290 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1291 ady = FFABS(dy);
1292 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1293 off = err / adx;
1294 if (dy < 0) {
1295 predicted = floor1_Y_final[low_neigh_offs] - off;
1296 } else {
1297 predicted = floor1_Y_final[low_neigh_offs] + off;
1298 } // render_point end
1299
1300 val = floor1_Y[i];
1301 highroom = range-predicted;
1302 lowroom = predicted;
1303 if (highroom < lowroom) {
1304 room = highroom * 2;
1305 } else {
1306 room = lowroom * 2; // SPEC misspelling
1307 }
1308 if (val) {
1309 floor1_flag[low_neigh_offs] = 1;
1310 floor1_flag[high_neigh_offs] = 1;
1311 floor1_flag[i] = 1;
1312 if (val >= room) {
1313 if (highroom > lowroom) {
1314 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1315 } else {
1316 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1317 }
1318 } else {
1319 if (val & 1) {
1320 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1321 } else {
1322 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1323 }
1324 }
1325 } else {
1326 floor1_flag[i] = 0;
1327 floor1_Y_final[i] = av_clip_uint16(predicted);
1328 }
1329
1330 ff_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1331 vf->list[i].x, floor1_Y_final[i], val);
1332 }
1333
1334 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1335
1336 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1337
1338 ff_dlog(NULL, " Floor decoded\n");
1339
1340 return 0;
1341 }
1342
setup_classifs(vorbis_context * vc,vorbis_residue * vr,uint8_t * do_not_decode,unsigned ch_used,int partition_count,int ptns_to_read)1343 static av_always_inline int setup_classifs(vorbis_context *vc,
1344 vorbis_residue *vr,
1345 uint8_t *do_not_decode,
1346 unsigned ch_used,
1347 int partition_count,
1348 int ptns_to_read
1349 )
1350 {
1351 vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1352 int p, j, i;
1353 unsigned c_p_c = codebook->dimensions;
1354 unsigned inverse_class = ff_inverse[vr->classifications];
1355 int temp, temp2;
1356 for (p = 0, j = 0; j < ch_used; ++j) {
1357 if (!do_not_decode[j]) {
1358 temp = get_vlc2(&vc->gb, codebook->vlc.table,
1359 codebook->nb_bits, 3);
1360
1361 ff_dlog(NULL, "Classword: %u\n", temp);
1362
1363 av_assert0(temp < 65536);
1364
1365 if (temp < 0) {
1366 av_log(vc->avctx, AV_LOG_ERROR,
1367 "Invalid vlc code decoding %d channel.", j);
1368 return AVERROR_INVALIDDATA;
1369 }
1370
1371 if (vr->classifications == 1) {
1372 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1373 if (i < ptns_to_read)
1374 vr->classifs[p + i] = 0;
1375 }
1376 } else {
1377 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1378 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1379
1380 if (i < ptns_to_read)
1381 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1382 temp = temp2;
1383 }
1384 }
1385 }
1386 p += ptns_to_read;
1387 }
1388 return 0;
1389 }
1390 // Read and decode residue
1391
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)1392 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1393 vorbis_residue *vr,
1394 unsigned ch,
1395 uint8_t *do_not_decode,
1396 float *vec,
1397 unsigned vlen,
1398 unsigned ch_left,
1399 int vr_type)
1400 {
1401 GetBitContext *gb = &vc->gb;
1402 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1403 uint8_t *classifs = vr->classifs;
1404 unsigned pass, ch_used, i, j, k, l;
1405 unsigned max_output = (ch - 1) * vlen;
1406 int ptns_to_read = vr->ptns_to_read;
1407 int libvorbis_bug = 0;
1408
1409 if (vr_type == 2) {
1410 for (j = 1; j < ch; ++j)
1411 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1412 if (do_not_decode[0])
1413 return 0;
1414 ch_used = 1;
1415 max_output += vr->end / ch;
1416 } else {
1417 ch_used = ch;
1418 max_output += vr->end;
1419 }
1420
1421 if (max_output > ch_left * vlen) {
1422 if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1423 ptns_to_read--;
1424 libvorbis_bug = 1;
1425 } else {
1426 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1427 return AVERROR_INVALIDDATA;
1428 }
1429 }
1430
1431 ff_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1432
1433 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1434 int voffset, partition_count, j_times_ptns_to_read;
1435
1436 voffset = vr->begin;
1437 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1438 if (!pass) {
1439 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read);
1440 if (ret < 0)
1441 return ret;
1442 }
1443 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1444 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1445 unsigned voffs;
1446
1447 if (!do_not_decode[j]) {
1448 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1449 int vqbook = vr->books[vqclass][pass];
1450
1451 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1452 int coffs;
1453 unsigned dim = vc->codebooks[vqbook].dimensions;
1454 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1455 vorbis_codebook codebook = vc->codebooks[vqbook];
1456
1457 if (vr_type == 0) {
1458
1459 voffs = voffset+j*vlen;
1460 for (k = 0; k < step; ++k) {
1461 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1462 if (coffs < 0)
1463 return coffs;
1464 coffs *= dim;
1465 for (l = 0; l < dim; ++l)
1466 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1467 }
1468 } else if (vr_type == 1) {
1469 voffs = voffset + j * vlen;
1470 for (k = 0; k < step; ++k) {
1471 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1472 if (coffs < 0)
1473 return coffs;
1474 coffs *= dim;
1475 for (l = 0; l < dim; ++l, ++voffs) {
1476 vec[voffs]+=codebook.codevectors[coffs+l];
1477
1478 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1479 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1480 }
1481 }
1482 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1483 voffs = voffset >> 1;
1484
1485 if (dim == 2) {
1486 for (k = 0; k < step; ++k) {
1487 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1488 if (coffs < 0)
1489 return coffs;
1490 coffs *= 2;
1491 vec[voffs + k ] += codebook.codevectors[coffs ];
1492 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1493 }
1494 } else if (dim == 4) {
1495 for (k = 0; k < step; ++k, voffs += 2) {
1496 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1497 if (coffs < 0)
1498 return coffs;
1499 coffs *= 4;
1500 vec[voffs ] += codebook.codevectors[coffs ];
1501 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1502 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1503 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1504 }
1505 } else
1506 for (k = 0; k < step; ++k) {
1507 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1508 if (coffs < 0)
1509 return coffs;
1510 coffs *= dim;
1511 for (l = 0; l < dim; l += 2, voffs++) {
1512 vec[voffs ] += codebook.codevectors[coffs + l ];
1513 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1514
1515 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1516 pass, voffset / ch + (voffs % ch) * vlen,
1517 vec[voffset / ch + (voffs % ch) * vlen],
1518 codebook.codevectors[coffs + l], coffs, l);
1519 }
1520 }
1521
1522 } else if (vr_type == 2) {
1523 unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1524 unsigned voffs_mod = voffset - voffs_div * ch;
1525
1526 for (k = 0; k < step; ++k) {
1527 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3);
1528 if (coffs < 0)
1529 return coffs;
1530 coffs *= dim;
1531 for (l = 0; l < dim; ++l) {
1532 vec[voffs_div + voffs_mod * vlen] +=
1533 codebook.codevectors[coffs + l];
1534
1535 ff_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1536 pass, voffs_div + voffs_mod * vlen,
1537 vec[voffs_div + voffs_mod * vlen],
1538 codebook.codevectors[coffs + l], coffs, l);
1539
1540 if (++voffs_mod == ch) {
1541 voffs_div++;
1542 voffs_mod = 0;
1543 }
1544 }
1545 }
1546 }
1547 }
1548 }
1549 j_times_ptns_to_read += ptns_to_read;
1550 }
1551 ++partition_count;
1552 voffset += vr->partition_size;
1553 }
1554 }
1555 if (libvorbis_bug && !pass) {
1556 for (j = 0; j < ch_used; ++j) {
1557 if (!do_not_decode[j]) {
1558 get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1559 vc->codebooks[vr->classbook].nb_bits, 3);
1560 }
1561 }
1562 }
1563 }
1564 return 0;
1565 }
1566
vorbis_residue_decode(vorbis_context * vc,vorbis_residue * vr,unsigned ch,uint8_t * do_not_decode,float * vec,unsigned vlen,unsigned ch_left)1567 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1568 unsigned ch,
1569 uint8_t *do_not_decode,
1570 float *vec, unsigned vlen,
1571 unsigned ch_left)
1572 {
1573 if (vr->type == 2)
1574 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1575 else if (vr->type == 1)
1576 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1577 else if (vr->type == 0)
1578 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1579 else {
1580 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1581 return AVERROR_INVALIDDATA;
1582 }
1583 }
1584
ff_vorbis_inverse_coupling(float * mag,float * ang,intptr_t blocksize)1585 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1586 {
1587 int i;
1588 for (i = 0; i < blocksize; i++) {
1589 if (mag[i] > 0.0) {
1590 if (ang[i] > 0.0) {
1591 ang[i] = mag[i] - ang[i];
1592 } else {
1593 float temp = ang[i];
1594 ang[i] = mag[i];
1595 mag[i] += temp;
1596 }
1597 } else {
1598 if (ang[i] > 0.0) {
1599 ang[i] += mag[i];
1600 } else {
1601 float temp = ang[i];
1602 ang[i] = mag[i];
1603 mag[i] -= temp;
1604 }
1605 }
1606 }
1607 }
1608
1609 // Decode the audio packet using the functions above
1610
vorbis_parse_audio_packet(vorbis_context * vc,float ** floor_ptr)1611 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1612 {
1613 GetBitContext *gb = &vc->gb;
1614 FFTContext *mdct;
1615 int previous_window = vc->previous_window;
1616 unsigned mode_number, blockflag, blocksize;
1617 int i, j;
1618 uint8_t no_residue[255];
1619 uint8_t do_not_decode[255];
1620 vorbis_mapping *mapping;
1621 float *ch_res_ptr = vc->channel_residues;
1622 uint8_t res_chan[255];
1623 unsigned res_num = 0;
1624 int retlen = 0;
1625 unsigned ch_left = vc->audio_channels;
1626 unsigned vlen;
1627
1628 if (get_bits1(gb)) {
1629 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1630 return AVERROR_INVALIDDATA; // packet type not audio
1631 }
1632
1633 if (vc->mode_count == 1) {
1634 mode_number = 0;
1635 } else {
1636 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1637 }
1638 vc->mode_number = mode_number;
1639 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1640
1641 ff_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1642 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1643
1644 blockflag = vc->modes[mode_number].blockflag;
1645 blocksize = vc->blocksize[blockflag];
1646 vlen = blocksize / 2;
1647 if (blockflag) {
1648 int code = get_bits(gb, 2);
1649 if (previous_window < 0)
1650 previous_window = code>>1;
1651 } else if (previous_window < 0)
1652 previous_window = 0;
1653
1654 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1655 for (i = 0; i < vc->audio_channels; ++i)
1656 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1657
1658 // Decode floor
1659
1660 for (i = 0; i < vc->audio_channels; ++i) {
1661 vorbis_floor *floor;
1662 int ret;
1663 if (mapping->submaps > 1) {
1664 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1665 } else {
1666 floor = &vc->floors[mapping->submap_floor[0]];
1667 }
1668
1669 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1670
1671 if (ret < 0) {
1672 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1673 return AVERROR_INVALIDDATA;
1674 }
1675 no_residue[i] = ret;
1676 }
1677
1678 // Nonzero vector propagate
1679
1680 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1681 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1682 no_residue[mapping->magnitude[i]] = 0;
1683 no_residue[mapping->angle[i]] = 0;
1684 }
1685 }
1686
1687 // Decode residue
1688
1689 for (i = 0; i < mapping->submaps; ++i) {
1690 vorbis_residue *residue;
1691 unsigned ch = 0;
1692 int ret;
1693
1694 for (j = 0; j < vc->audio_channels; ++j) {
1695 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1696 res_chan[j] = res_num;
1697 if (no_residue[j]) {
1698 do_not_decode[ch] = 1;
1699 } else {
1700 do_not_decode[ch] = 0;
1701 }
1702 ++ch;
1703 ++res_num;
1704 }
1705 }
1706 residue = &vc->residues[mapping->submap_residue[i]];
1707 if (ch_left < ch) {
1708 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1709 return AVERROR_INVALIDDATA;
1710 }
1711 if (ch) {
1712 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1713 if (ret < 0)
1714 return ret;
1715 }
1716
1717 ch_res_ptr += ch * vlen;
1718 ch_left -= ch;
1719 }
1720
1721 if (ch_left > 0)
1722 return AVERROR_INVALIDDATA;
1723
1724 // Inverse coupling
1725
1726 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1727 float *mag, *ang;
1728
1729 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1730 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1731 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1732 }
1733
1734 // Dotproduct, MDCT
1735
1736 mdct = &vc->mdct[blockflag];
1737
1738 for (j = vc->audio_channels-1;j >= 0; j--) {
1739 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1740 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1741 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1742 }
1743
1744 // Overlap/add, save data for next overlapping
1745
1746 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1747 for (j = 0; j < vc->audio_channels; j++) {
1748 unsigned bs0 = vc->blocksize[0];
1749 unsigned bs1 = vc->blocksize[1];
1750 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1751 float *saved = vc->saved + j * bs1 / 4;
1752 float *ret = floor_ptr[j];
1753 float *buf = residue;
1754 const float *win = vc->win[blockflag & previous_window];
1755
1756 if (blockflag == previous_window) {
1757 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1758 } else if (blockflag > previous_window) {
1759 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1760 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1761 } else {
1762 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1763 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1764 }
1765 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1766 }
1767
1768 vc->previous_window = blockflag;
1769 return retlen;
1770 }
1771
1772 // Return the decoded audio packet through the standard api
1773
vorbis_decode_frame(AVCodecContext * avctx,AVFrame * frame,int * got_frame_ptr,AVPacket * avpkt)1774 static int vorbis_decode_frame(AVCodecContext *avctx, AVFrame *frame,
1775 int *got_frame_ptr, AVPacket *avpkt)
1776 {
1777 const uint8_t *buf = avpkt->data;
1778 int buf_size = avpkt->size;
1779 vorbis_context *vc = avctx->priv_data;
1780 GetBitContext *gb = &vc->gb;
1781 float *channel_ptrs[255];
1782 int i, len, ret;
1783
1784 ff_dlog(NULL, "packet length %d \n", buf_size);
1785
1786 if (*buf == 1 && buf_size > 7) {
1787 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1788 return ret;
1789
1790 vorbis_free(vc);
1791 if ((ret = vorbis_parse_id_hdr(vc))) {
1792 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1793 vorbis_free(vc);
1794 return ret;
1795 }
1796
1797 av_channel_layout_uninit(&avctx->ch_layout);
1798 if (vc->audio_channels > 8) {
1799 avctx->ch_layout.order = AV_CHANNEL_ORDER_UNSPEC;
1800 avctx->ch_layout.nb_channels = vc->audio_channels;
1801 } else {
1802 av_channel_layout_copy(&avctx->ch_layout, &ff_vorbis_ch_layouts[vc->audio_channels - 1]);
1803 }
1804
1805 avctx->sample_rate = vc->audio_samplerate;
1806 return buf_size;
1807 }
1808
1809 if (*buf == 3 && buf_size > 7) {
1810 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1811 return buf_size;
1812 }
1813
1814 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1815 if ((ret = init_get_bits8(gb, buf + 1, buf_size - 1)) < 0)
1816 return ret;
1817
1818 if ((ret = vorbis_parse_setup_hdr(vc))) {
1819 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1820 vorbis_free(vc);
1821 return ret;
1822 }
1823 return buf_size;
1824 }
1825
1826 if (!vc->channel_residues || !vc->modes) {
1827 av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1828 return AVERROR_INVALIDDATA;
1829 }
1830
1831 /* get output buffer */
1832 frame->nb_samples = vc->blocksize[1] / 2;
1833 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1834 return ret;
1835
1836 if (vc->audio_channels > 8) {
1837 for (i = 0; i < vc->audio_channels; i++)
1838 channel_ptrs[i] = (float *)frame->extended_data[i];
1839 } else {
1840 for (i = 0; i < vc->audio_channels; i++) {
1841 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1842 channel_ptrs[ch] = (float *)frame->extended_data[i];
1843 }
1844 }
1845
1846 if ((ret = init_get_bits8(gb, buf, buf_size)) < 0)
1847 return ret;
1848
1849 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1850 return len;
1851
1852 if (!vc->first_frame) {
1853 vc->first_frame = 1;
1854 *got_frame_ptr = 0;
1855 av_frame_unref(frame);
1856 return buf_size;
1857 }
1858
1859 ff_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1860 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1861
1862 frame->nb_samples = len;
1863 *got_frame_ptr = 1;
1864
1865 return buf_size;
1866 }
1867
1868 // Close decoder
1869
vorbis_decode_close(AVCodecContext * avctx)1870 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1871 {
1872 vorbis_context *vc = avctx->priv_data;
1873
1874 vorbis_free(vc);
1875
1876 return 0;
1877 }
1878
vorbis_decode_flush(AVCodecContext * avctx)1879 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1880 {
1881 vorbis_context *vc = avctx->priv_data;
1882
1883 if (vc->saved) {
1884 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1885 sizeof(*vc->saved));
1886 }
1887 vc->previous_window = -1;
1888 vc->first_frame = 0;
1889 }
1890
1891 const FFCodec ff_vorbis_decoder = {
1892 .p.name = "vorbis",
1893 .p.long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1894 .p.type = AVMEDIA_TYPE_AUDIO,
1895 .p.id = AV_CODEC_ID_VORBIS,
1896 .priv_data_size = sizeof(vorbis_context),
1897 .init = vorbis_decode_init,
1898 .close = vorbis_decode_close,
1899 FF_CODEC_DECODE_CB(vorbis_decode_frame),
1900 .flush = vorbis_decode_flush,
1901 .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF,
1902 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE | FF_CODEC_CAP_INIT_CLEANUP,
1903 #if FF_API_OLD_CHANNEL_LAYOUT
1904 .p.channel_layouts = ff_vorbis_channel_layouts,
1905 #endif
1906 .p.ch_layouts = ff_vorbis_ch_layouts,
1907 .p.sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1908 AV_SAMPLE_FMT_NONE },
1909 };
1910