496d4c3f33bff66f7d4191bb973a24ac97b0b756
[libav.git] / libavcodec / vorbisdec.c
1 /*
2 * This file is part of Libav.
3 *
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
8 *
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18
19 /**
20 * @file
21 * Vorbis I decoder
22 * @author Denes Balatoni ( dbalatoni programozo hu )
23 */
24
25 #include <inttypes.h>
26 #include <math.h>
27
28 #define BITSTREAM_READER_LE
29 #include "libavutil/float_dsp.h"
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 #undef NDEBUG
45 #include <assert.h>
46
47 typedef struct {
48 uint8_t dimensions;
49 uint8_t lookup_type;
50 uint8_t maxdepth;
51 VLC vlc;
52 float *codevectors;
53 unsigned int nb_bits;
54 } vorbis_codebook;
55
56 typedef union vorbis_floor_u vorbis_floor_data;
57 typedef struct vorbis_floor0_s vorbis_floor0;
58 typedef struct vorbis_floor1_s vorbis_floor1;
59 struct vorbis_context_s;
60 typedef
61 int (* vorbis_floor_decode_func)
62 (struct vorbis_context_s *, vorbis_floor_data *, float *);
63 typedef struct {
64 uint8_t floor_type;
65 vorbis_floor_decode_func decode;
66 union vorbis_floor_u {
67 struct vorbis_floor0_s {
68 uint8_t order;
69 uint16_t rate;
70 uint16_t bark_map_size;
71 int32_t *map[2];
72 uint32_t map_size[2];
73 uint8_t amplitude_bits;
74 uint8_t amplitude_offset;
75 uint8_t num_books;
76 uint8_t *book_list;
77 float *lsp;
78 } t0;
79 struct vorbis_floor1_s {
80 uint8_t partitions;
81 uint8_t partition_class[32];
82 uint8_t class_dimensions[16];
83 uint8_t class_subclasses[16];
84 uint8_t class_masterbook[16];
85 int16_t subclass_books[16][8];
86 uint8_t multiplier;
87 uint16_t x_list_dim;
88 vorbis_floor1_entry *list;
89 } t1;
90 } data;
91 } vorbis_floor;
92
93 typedef struct {
94 uint16_t type;
95 uint32_t begin;
96 uint32_t end;
97 unsigned partition_size;
98 uint8_t classifications;
99 uint8_t classbook;
100 int16_t books[64][8];
101 uint8_t maxpass;
102 uint16_t ptns_to_read;
103 uint8_t *classifs;
104 } vorbis_residue;
105
106 typedef struct {
107 uint8_t submaps;
108 uint16_t coupling_steps;
109 uint8_t *magnitude;
110 uint8_t *angle;
111 uint8_t *mux;
112 uint8_t submap_floor[16];
113 uint8_t submap_residue[16];
114 } vorbis_mapping;
115
116 typedef struct {
117 uint8_t blockflag;
118 uint16_t windowtype;
119 uint16_t transformtype;
120 uint8_t mapping;
121 } vorbis_mode;
122
123 typedef struct vorbis_context_s {
124 AVCodecContext *avccontext;
125 AVFrame frame;
126 GetBitContext gb;
127 DSPContext dsp;
128 AVFloatDSPContext fdsp;
129 FmtConvertContext fmt_conv;
130
131 FFTContext mdct[2];
132 uint8_t first_frame;
133 uint32_t version;
134 uint8_t audio_channels;
135 uint32_t audio_samplerate;
136 uint32_t bitrate_maximum;
137 uint32_t bitrate_nominal;
138 uint32_t bitrate_minimum;
139 uint32_t blocksize[2];
140 const float *win[2];
141 uint16_t codebook_count;
142 vorbis_codebook *codebooks;
143 uint8_t floor_count;
144 vorbis_floor *floors;
145 uint8_t residue_count;
146 vorbis_residue *residues;
147 uint8_t mapping_count;
148 vorbis_mapping *mappings;
149 uint8_t mode_count;
150 vorbis_mode *modes;
151 uint8_t mode_number; // mode number for the current packet
152 uint8_t previous_window;
153 float *channel_residues;
154 float *saved;
155 } vorbis_context;
156
157 /* Helper functions */
158
159 #define BARK(x) \
160 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
161
162 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
163 #define VALIDATE_INDEX(idx, limit) \
164 if (idx >= limit) {\
165 av_log(vc->avccontext, AV_LOG_ERROR,\
166 idx_err_str,\
167 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
168 return AVERROR_INVALIDDATA;\
169 }
170 #define GET_VALIDATED_INDEX(idx, bits, limit) \
171 {\
172 idx = get_bits(gb, bits);\
173 VALIDATE_INDEX(idx, limit)\
174 }
175
176 static float vorbisfloat2float(unsigned val)
177 {
178 double mant = val & 0x1fffff;
179 long exp = (val & 0x7fe00000L) >> 21;
180 if (val & 0x80000000)
181 mant = -mant;
182 return ldexp(mant, exp - 20 - 768);
183 }
184
185
186 // Free all allocated memory -----------------------------------------
187
188 static void vorbis_free(vorbis_context *vc)
189 {
190 int i;
191
192 av_freep(&vc->channel_residues);
193 av_freep(&vc->saved);
194
195 for (i = 0; i < vc->residue_count; i++)
196 av_free(vc->residues[i].classifs);
197 av_freep(&vc->residues);
198 av_freep(&vc->modes);
199
200 ff_mdct_end(&vc->mdct[0]);
201 ff_mdct_end(&vc->mdct[1]);
202
203 for (i = 0; i < vc->codebook_count; ++i) {
204 av_free(vc->codebooks[i].codevectors);
205 ff_free_vlc(&vc->codebooks[i].vlc);
206 }
207 av_freep(&vc->codebooks);
208
209 for (i = 0; i < vc->floor_count; ++i) {
210 if (vc->floors[i].floor_type == 0) {
211 av_free(vc->floors[i].data.t0.map[0]);
212 av_free(vc->floors[i].data.t0.map[1]);
213 av_free(vc->floors[i].data.t0.book_list);
214 av_free(vc->floors[i].data.t0.lsp);
215 } else {
216 av_free(vc->floors[i].data.t1.list);
217 }
218 }
219 av_freep(&vc->floors);
220
221 for (i = 0; i < vc->mapping_count; ++i) {
222 av_free(vc->mappings[i].magnitude);
223 av_free(vc->mappings[i].angle);
224 av_free(vc->mappings[i].mux);
225 }
226 av_freep(&vc->mappings);
227 }
228
229 // Parse setup header -------------------------------------------------
230
231 // Process codebooks part
232
233 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
234 {
235 unsigned cb;
236 uint8_t *tmp_vlc_bits;
237 uint32_t *tmp_vlc_codes;
238 GetBitContext *gb = &vc->gb;
239 uint16_t *codebook_multiplicands;
240 int ret = 0;
241
242 vc->codebook_count = get_bits(gb, 8) + 1;
243
244 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
245
246 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
247 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
248 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
249 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
250
251 for (cb = 0; cb < vc->codebook_count; ++cb) {
252 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
253 unsigned ordered, t, entries, used_entries = 0;
254
255 av_dlog(NULL, " %u. Codebook\n", cb);
256
257 if (get_bits(gb, 24) != 0x564342) {
258 av_log(vc->avccontext, AV_LOG_ERROR,
259 " %u. Codebook setup data corrupt.\n", cb);
260 ret = AVERROR_INVALIDDATA;
261 goto error;
262 }
263
264 codebook_setup->dimensions=get_bits(gb, 16);
265 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
266 av_log(vc->avccontext, AV_LOG_ERROR,
267 " %u. Codebook's dimension is invalid (%d).\n",
268 cb, codebook_setup->dimensions);
269 ret = AVERROR_INVALIDDATA;
270 goto error;
271 }
272 entries = get_bits(gb, 24);
273 if (entries > V_MAX_VLCS) {
274 av_log(vc->avccontext, AV_LOG_ERROR,
275 " %u. Codebook has too many entries (%u).\n",
276 cb, entries);
277 ret = AVERROR_INVALIDDATA;
278 goto error;
279 }
280
281 ordered = get_bits1(gb);
282
283 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
284 codebook_setup->dimensions, entries);
285
286 if (!ordered) {
287 unsigned ce, flag;
288 unsigned sparse = get_bits1(gb);
289
290 av_dlog(NULL, " not ordered \n");
291
292 if (sparse) {
293 av_dlog(NULL, " sparse \n");
294
295 used_entries = 0;
296 for (ce = 0; ce < entries; ++ce) {
297 flag = get_bits1(gb);
298 if (flag) {
299 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
300 ++used_entries;
301 } else
302 tmp_vlc_bits[ce] = 0;
303 }
304 } else {
305 av_dlog(NULL, " not sparse \n");
306
307 used_entries = entries;
308 for (ce = 0; ce < entries; ++ce)
309 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
310 }
311 } else {
312 unsigned current_entry = 0;
313 unsigned current_length = get_bits(gb, 5) + 1;
314
315 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
316
317 used_entries = entries;
318 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
319 unsigned i, number;
320
321 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
322
323 number = get_bits(gb, ilog(entries - current_entry));
324
325 av_dlog(NULL, " number: %u\n", number);
326
327 for (i = current_entry; i < number+current_entry; ++i)
328 if (i < used_entries)
329 tmp_vlc_bits[i] = current_length;
330
331 current_entry+=number;
332 }
333 if (current_entry>used_entries) {
334 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
335 ret = AVERROR_INVALIDDATA;
336 goto error;
337 }
338 }
339
340 codebook_setup->lookup_type = get_bits(gb, 4);
341
342 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
343 codebook_setup->lookup_type ? "vq" : "no lookup");
344
345 // If the codebook is used for (inverse) VQ, calculate codevectors.
346
347 if (codebook_setup->lookup_type == 1) {
348 unsigned i, j, k;
349 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
350
351 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
352 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
353 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
354 unsigned codebook_sequence_p = get_bits1(gb);
355
356 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
357 codebook_lookup_values);
358 av_dlog(NULL, " delta %f minmum %f \n",
359 codebook_delta_value, codebook_minimum_value);
360
361 for (i = 0; i < codebook_lookup_values; ++i) {
362 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
363
364 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
365 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
366 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
367 }
368
369 // Weed out unused vlcs and build codevector vector
370 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
371 codebook_setup->dimensions *
372 sizeof(*codebook_setup->codevectors))
373 : NULL;
374 for (j = 0, i = 0; i < entries; ++i) {
375 unsigned dim = codebook_setup->dimensions;
376
377 if (tmp_vlc_bits[i]) {
378 float last = 0.0;
379 unsigned lookup_offset = i;
380
381 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
382
383 for (k = 0; k < dim; ++k) {
384 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
385 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
386 if (codebook_sequence_p)
387 last = codebook_setup->codevectors[j * dim + k];
388 lookup_offset/=codebook_lookup_values;
389 }
390 tmp_vlc_bits[j] = tmp_vlc_bits[i];
391
392 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
393 for (k = 0; k < dim; ++k)
394 av_dlog(vc->avccontext, " %f ",
395 codebook_setup->codevectors[j * dim + k]);
396 av_dlog(vc->avccontext, "\n");
397
398 ++j;
399 }
400 }
401 if (j != used_entries) {
402 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
403 ret = AVERROR_INVALIDDATA;
404 goto error;
405 }
406 entries = used_entries;
407 } else if (codebook_setup->lookup_type >= 2) {
408 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
409 ret = AVERROR_INVALIDDATA;
410 goto error;
411 }
412
413 // Initialize VLC table
414 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
415 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
416 ret = AVERROR_INVALIDDATA;
417 goto error;
418 }
419 codebook_setup->maxdepth = 0;
420 for (t = 0; t < entries; ++t)
421 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
422 codebook_setup->maxdepth = tmp_vlc_bits[t];
423
424 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
425 codebook_setup->nb_bits = V_NB_BITS2;
426 else
427 codebook_setup->nb_bits = V_NB_BITS;
428
429 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
430
431 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
432 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
433 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
434 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
435 INIT_VLC_LE))) {
436 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
437 goto error;
438 }
439 }
440
441 av_free(tmp_vlc_bits);
442 av_free(tmp_vlc_codes);
443 av_free(codebook_multiplicands);
444 return 0;
445
446 // Error:
447 error:
448 av_free(tmp_vlc_bits);
449 av_free(tmp_vlc_codes);
450 av_free(codebook_multiplicands);
451 return ret;
452 }
453
454 // Process time domain transforms part (unused in Vorbis I)
455
456 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
457 {
458 GetBitContext *gb = &vc->gb;
459 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
460
461 for (i = 0; i < vorbis_time_count; ++i) {
462 unsigned vorbis_tdtransform = get_bits(gb, 16);
463
464 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
465 vorbis_time_count, vorbis_tdtransform);
466
467 if (vorbis_tdtransform) {
468 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
469 return AVERROR_INVALIDDATA;
470 }
471 }
472 return 0;
473 }
474
475 // Process floors part
476
477 static int vorbis_floor0_decode(vorbis_context *vc,
478 vorbis_floor_data *vfu, float *vec);
479 static void create_map(vorbis_context *vc, unsigned floor_number);
480 static int vorbis_floor1_decode(vorbis_context *vc,
481 vorbis_floor_data *vfu, float *vec);
482 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
483 {
484 GetBitContext *gb = &vc->gb;
485 int i,j,k;
486
487 vc->floor_count = get_bits(gb, 6) + 1;
488
489 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
490
491 for (i = 0; i < vc->floor_count; ++i) {
492 vorbis_floor *floor_setup = &vc->floors[i];
493
494 floor_setup->floor_type = get_bits(gb, 16);
495
496 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
497
498 if (floor_setup->floor_type == 1) {
499 int maximum_class = -1;
500 unsigned rangebits, rangemax, floor1_values = 2;
501
502 floor_setup->decode = vorbis_floor1_decode;
503
504 floor_setup->data.t1.partitions = get_bits(gb, 5);
505
506 av_dlog(NULL, " %d.floor: %d partitions \n",
507 i, floor_setup->data.t1.partitions);
508
509 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
510 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
511 if (floor_setup->data.t1.partition_class[j] > maximum_class)
512 maximum_class = floor_setup->data.t1.partition_class[j];
513
514 av_dlog(NULL, " %d. floor %d partition class %d \n",
515 i, j, floor_setup->data.t1.partition_class[j]);
516
517 }
518
519 av_dlog(NULL, " maximum class %d \n", maximum_class);
520
521 for (j = 0; j <= maximum_class; ++j) {
522 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
523 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
524
525 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
526 floor_setup->data.t1.class_dimensions[j],
527 floor_setup->data.t1.class_subclasses[j]);
528
529 if (floor_setup->data.t1.class_subclasses[j]) {
530 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
531
532 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
533 }
534
535 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
536 int16_t bits = get_bits(gb, 8) - 1;
537 if (bits != -1)
538 VALIDATE_INDEX(bits, vc->codebook_count)
539 floor_setup->data.t1.subclass_books[j][k] = bits;
540
541 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
542 }
543 }
544
545 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
546 floor_setup->data.t1.x_list_dim = 2;
547
548 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
549 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
550
551 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
552 sizeof(*floor_setup->data.t1.list));
553
554
555 rangebits = get_bits(gb, 4);
556 rangemax = (1 << rangebits);
557 if (rangemax > vc->blocksize[1] / 2) {
558 av_log(vc->avccontext, AV_LOG_ERROR,
559 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
560 rangemax, vc->blocksize[1] / 2);
561 return AVERROR_INVALIDDATA;
562 }
563 floor_setup->data.t1.list[0].x = 0;
564 floor_setup->data.t1.list[1].x = rangemax;
565
566 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
567 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
568 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
569
570 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
571 floor_setup->data.t1.list[floor1_values].x);
572 }
573 }
574
575 // Precalculate order of x coordinates - needed for decode
576 if (ff_vorbis_ready_floor1_list(vc->avccontext,
577 floor_setup->data.t1.list,
578 floor_setup->data.t1.x_list_dim)) {
579 return AVERROR_INVALIDDATA;
580 }
581 } else if (floor_setup->floor_type == 0) {
582 unsigned max_codebook_dim = 0;
583
584 floor_setup->decode = vorbis_floor0_decode;
585
586 floor_setup->data.t0.order = get_bits(gb, 8);
587 floor_setup->data.t0.rate = get_bits(gb, 16);
588 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
589 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
590 /* zero would result in a div by zero later *
591 * 2^0 - 1 == 0 */
592 if (floor_setup->data.t0.amplitude_bits == 0) {
593 av_log(vc->avccontext, AV_LOG_ERROR,
594 "Floor 0 amplitude bits is 0.\n");
595 return AVERROR_INVALIDDATA;
596 }
597 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
598 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
599
600 /* allocate mem for booklist */
601 floor_setup->data.t0.book_list =
602 av_malloc(floor_setup->data.t0.num_books);
603 if (!floor_setup->data.t0.book_list)
604 return AVERROR(ENOMEM);
605 /* read book indexes */
606 {
607 int idx;
608 unsigned book_idx;
609 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
610 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
611 floor_setup->data.t0.book_list[idx] = book_idx;
612 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
613 max_codebook_dim = vc->codebooks[book_idx].dimensions;
614 }
615 }
616
617 create_map(vc, i);
618
619 /* codebook dim is for padding if codebook dim doesn't *
620 * divide order+1 then we need to read more data */
621 floor_setup->data.t0.lsp =
622 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
623 * sizeof(*floor_setup->data.t0.lsp));
624 if (!floor_setup->data.t0.lsp)
625 return AVERROR(ENOMEM);
626
627 /* debug output parsed headers */
628 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
629 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
630 av_dlog(NULL, "floor0 bark map size: %u\n",
631 floor_setup->data.t0.bark_map_size);
632 av_dlog(NULL, "floor0 amplitude bits: %u\n",
633 floor_setup->data.t0.amplitude_bits);
634 av_dlog(NULL, "floor0 amplitude offset: %u\n",
635 floor_setup->data.t0.amplitude_offset);
636 av_dlog(NULL, "floor0 number of books: %u\n",
637 floor_setup->data.t0.num_books);
638 av_dlog(NULL, "floor0 book list pointer: %p\n",
639 floor_setup->data.t0.book_list);
640 {
641 int idx;
642 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
643 av_dlog(NULL, " Book %d: %u\n", idx + 1,
644 floor_setup->data.t0.book_list[idx]);
645 }
646 }
647 } else {
648 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
649 return AVERROR_INVALIDDATA;
650 }
651 }
652 return 0;
653 }
654
655 // Process residues part
656
657 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
658 {
659 GetBitContext *gb = &vc->gb;
660 unsigned i, j, k;
661
662 vc->residue_count = get_bits(gb, 6)+1;
663 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
664
665 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
666
667 for (i = 0; i < vc->residue_count; ++i) {
668 vorbis_residue *res_setup = &vc->residues[i];
669 uint8_t cascade[64];
670 unsigned high_bits, low_bits;
671
672 res_setup->type = get_bits(gb, 16);
673
674 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
675
676 res_setup->begin = get_bits(gb, 24);
677 res_setup->end = get_bits(gb, 24);
678 res_setup->partition_size = get_bits(gb, 24) + 1;
679 /* Validations to prevent a buffer overflow later. */
680 if (res_setup->begin>res_setup->end ||
681 res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
682 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
683 av_log(vc->avccontext, AV_LOG_ERROR,
684 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
685 res_setup->type, res_setup->begin, res_setup->end,
686 res_setup->partition_size, vc->blocksize[1] / 2);
687 return AVERROR_INVALIDDATA;
688 }
689
690 res_setup->classifications = get_bits(gb, 6) + 1;
691 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
692
693 res_setup->ptns_to_read =
694 (res_setup->end - res_setup->begin) / res_setup->partition_size;
695 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
696 vc->audio_channels *
697 sizeof(*res_setup->classifs));
698 if (!res_setup->classifs)
699 return AVERROR(ENOMEM);
700
701 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
702 res_setup->begin, res_setup->end, res_setup->partition_size,
703 res_setup->classifications, res_setup->classbook);
704
705 for (j = 0; j < res_setup->classifications; ++j) {
706 high_bits = 0;
707 low_bits = get_bits(gb, 3);
708 if (get_bits1(gb))
709 high_bits = get_bits(gb, 5);
710 cascade[j] = (high_bits << 3) + low_bits;
711
712 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
713 }
714
715 res_setup->maxpass = 0;
716 for (j = 0; j < res_setup->classifications; ++j) {
717 for (k = 0; k < 8; ++k) {
718 if (cascade[j]&(1 << k)) {
719 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
720
721 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
722 j, k, res_setup->books[j][k]);
723
724 if (k>res_setup->maxpass)
725 res_setup->maxpass = k;
726 } else {
727 res_setup->books[j][k] = -1;
728 }
729 }
730 }
731 }
732 return 0;
733 }
734
735 // Process mappings part
736
737 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
738 {
739 GetBitContext *gb = &vc->gb;
740 unsigned i, j;
741
742 vc->mapping_count = get_bits(gb, 6)+1;
743 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
744
745 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
746
747 for (i = 0; i < vc->mapping_count; ++i) {
748 vorbis_mapping *mapping_setup = &vc->mappings[i];
749
750 if (get_bits(gb, 16)) {
751 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
752 return AVERROR_INVALIDDATA;
753 }
754 if (get_bits1(gb)) {
755 mapping_setup->submaps = get_bits(gb, 4) + 1;
756 } else {
757 mapping_setup->submaps = 1;
758 }
759
760 if (get_bits1(gb)) {
761 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
762 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
763 sizeof(*mapping_setup->magnitude));
764 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
765 sizeof(*mapping_setup->angle));
766 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
767 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
768 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
769 }
770 } else {
771 mapping_setup->coupling_steps = 0;
772 }
773
774 av_dlog(NULL, " %u mapping coupling steps: %d\n",
775 i, mapping_setup->coupling_steps);
776
777 if (get_bits(gb, 2)) {
778 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
779 return AVERROR_INVALIDDATA; // following spec.
780 }
781
782 if (mapping_setup->submaps>1) {
783 mapping_setup->mux = av_mallocz(vc->audio_channels *
784 sizeof(*mapping_setup->mux));
785 for (j = 0; j < vc->audio_channels; ++j)
786 mapping_setup->mux[j] = get_bits(gb, 4);
787 }
788
789 for (j = 0; j < mapping_setup->submaps; ++j) {
790 skip_bits(gb, 8); // FIXME check?
791 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
792 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
793
794 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
795 mapping_setup->submap_floor[j],
796 mapping_setup->submap_residue[j]);
797 }
798 }
799 return 0;
800 }
801
802 // Process modes part
803
804 static void create_map(vorbis_context *vc, unsigned floor_number)
805 {
806 vorbis_floor *floors = vc->floors;
807 vorbis_floor0 *vf;
808 int idx;
809 int blockflag, n;
810 int32_t *map;
811
812 for (blockflag = 0; blockflag < 2; ++blockflag) {
813 n = vc->blocksize[blockflag] / 2;
814 floors[floor_number].data.t0.map[blockflag] =
815 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
816
817 map = floors[floor_number].data.t0.map[blockflag];
818 vf = &floors[floor_number].data.t0;
819
820 for (idx = 0; idx < n; ++idx) {
821 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
822 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
823 if (vf->bark_map_size-1 < map[idx])
824 map[idx] = vf->bark_map_size - 1;
825 }
826 map[n] = -1;
827 vf->map_size[blockflag] = n;
828 }
829
830 for (idx = 0; idx <= n; ++idx) {
831 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
832 }
833 }
834
835 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
836 {
837 GetBitContext *gb = &vc->gb;
838 unsigned i;
839
840 vc->mode_count = get_bits(gb, 6) + 1;
841 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
842
843 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
844
845 for (i = 0; i < vc->mode_count; ++i) {
846 vorbis_mode *mode_setup = &vc->modes[i];
847
848 mode_setup->blockflag = get_bits1(gb);
849 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
850 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
851 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
852
853 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
854 i, mode_setup->blockflag, mode_setup->windowtype,
855 mode_setup->transformtype, mode_setup->mapping);
856 }
857 return 0;
858 }
859
860 // Process the whole setup header using the functions above
861
862 static int vorbis_parse_setup_hdr(vorbis_context *vc)
863 {
864 GetBitContext *gb = &vc->gb;
865 int ret;
866
867 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
868 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
869 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
870 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
871 return AVERROR_INVALIDDATA;
872 }
873
874 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
875 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
876 return ret;
877 }
878 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
879 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
880 return ret;
881 }
882 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
883 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
884 return ret;
885 }
886 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
887 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
888 return ret;
889 }
890 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
891 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
892 return ret;
893 }
894 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
895 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
896 return ret;
897 }
898 if (!get_bits1(gb)) {
899 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
900 return AVERROR_INVALIDDATA; // framing flag bit unset error
901 }
902
903 return 0;
904 }
905
906 // Process the identification header
907
908 static int vorbis_parse_id_hdr(vorbis_context *vc)
909 {
910 GetBitContext *gb = &vc->gb;
911 unsigned bl0, bl1;
912
913 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
914 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
915 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
916 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
917 return AVERROR_INVALIDDATA;
918 }
919
920 vc->version = get_bits_long(gb, 32); //FIXME check 0
921 vc->audio_channels = get_bits(gb, 8);
922 if (vc->audio_channels <= 0) {
923 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
924 return AVERROR_INVALIDDATA;
925 }
926 vc->audio_samplerate = get_bits_long(gb, 32);
927 if (vc->audio_samplerate <= 0) {
928 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
929 return AVERROR_INVALIDDATA;
930 }
931 vc->bitrate_maximum = get_bits_long(gb, 32);
932 vc->bitrate_nominal = get_bits_long(gb, 32);
933 vc->bitrate_minimum = get_bits_long(gb, 32);
934 bl0 = get_bits(gb, 4);
935 bl1 = get_bits(gb, 4);
936 vc->blocksize[0] = (1 << bl0);
937 vc->blocksize[1] = (1 << bl1);
938 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
939 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
940 return AVERROR_INVALIDDATA;
941 }
942 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
943 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
944
945 if ((get_bits1(gb)) == 0) {
946 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
947 return AVERROR_INVALIDDATA;
948 }
949
950 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
951 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
952 vc->previous_window = 0;
953
954 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
955 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
956
957 av_dlog(NULL, " vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
958 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
959
960 /*
961 BLK = vc->blocksize[0];
962 for (i = 0; i < BLK / 2; ++i) {
963 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)));
964 }
965 */
966
967 return 0;
968 }
969
970 // Process the extradata using the functions above (identification header, setup header)
971
972 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
973 {
974 vorbis_context *vc = avccontext->priv_data;
975 uint8_t *headers = avccontext->extradata;
976 int headers_len = avccontext->extradata_size;
977 uint8_t *header_start[3];
978 int header_len[3];
979 GetBitContext *gb = &vc->gb;
980 int hdr_type, ret;
981
982 vc->avccontext = avccontext;
983 ff_dsputil_init(&vc->dsp, avccontext);
984 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
985 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
986
987 avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
988
989 if (!headers_len) {
990 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
991 return AVERROR_INVALIDDATA;
992 }
993
994 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
995 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
996 return ret;
997 }
998
999 init_get_bits(gb, header_start[0], header_len[0]*8);
1000 hdr_type = get_bits(gb, 8);
1001 if (hdr_type != 1) {
1002 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1003 return AVERROR_INVALIDDATA;
1004 }
1005 if ((ret = vorbis_parse_id_hdr(vc))) {
1006 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1007 vorbis_free(vc);
1008 return ret;
1009 }
1010
1011 init_get_bits(gb, header_start[2], header_len[2]*8);
1012 hdr_type = get_bits(gb, 8);
1013 if (hdr_type != 5) {
1014 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1015 vorbis_free(vc);
1016 return AVERROR_INVALIDDATA;
1017 }
1018 if ((ret = vorbis_parse_setup_hdr(vc))) {
1019 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1020 vorbis_free(vc);
1021 return ret;
1022 }
1023
1024 if (vc->audio_channels > 8)
1025 avccontext->channel_layout = 0;
1026 else
1027 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1028
1029 avccontext->channels = vc->audio_channels;
1030 avccontext->sample_rate = vc->audio_samplerate;
1031
1032 avcodec_get_frame_defaults(&vc->frame);
1033 avccontext->coded_frame = &vc->frame;
1034
1035 return 0;
1036 }
1037
1038 // Decode audiopackets -------------------------------------------------
1039
1040 // Read and decode floor
1041
1042 static int vorbis_floor0_decode(vorbis_context *vc,
1043 vorbis_floor_data *vfu, float *vec)
1044 {
1045 vorbis_floor0 *vf = &vfu->t0;
1046 float *lsp = vf->lsp;
1047 unsigned amplitude, book_idx;
1048 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1049
1050 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1051 if (amplitude > 0) {
1052 float last = 0;
1053 unsigned idx, lsp_len = 0;
1054 vorbis_codebook codebook;
1055
1056 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1057 if (book_idx >= vf->num_books) {
1058 av_log(vc->avccontext, AV_LOG_ERROR,
1059 "floor0 dec: booknumber too high!\n");
1060 book_idx = 0;
1061 }
1062 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1063 codebook = vc->codebooks[vf->book_list[book_idx]];
1064 /* Invalid codebook! */
1065 if (!codebook.codevectors)
1066 return AVERROR_INVALIDDATA;
1067
1068 while (lsp_len<vf->order) {
1069 int vec_off;
1070
1071 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1072 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1073 /* read temp vector */
1074 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1075 codebook.nb_bits, codebook.maxdepth)
1076 * codebook.dimensions;
1077 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1078 /* copy each vector component and add last to it */
1079 for (idx = 0; idx < codebook.dimensions; ++idx)
1080 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1081 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1082
1083 lsp_len += codebook.dimensions;
1084 }
1085 /* DEBUG: output lsp coeffs */
1086 {
1087 int idx;
1088 for (idx = 0; idx < lsp_len; ++idx)
1089 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1090 }
1091
1092 /* synthesize floor output vector */
1093 {
1094 int i;
1095 int order = vf->order;
1096 float wstep = M_PI / vf->bark_map_size;
1097
1098 for (i = 0; i < order; i++)
1099 lsp[i] = 2.0f * cos(lsp[i]);
1100
1101 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1102 vf->map_size[blockflag], order, wstep);
1103
1104 i = 0;
1105 while (i < vf->map_size[blockflag]) {
1106 int j, iter_cond = vf->map[blockflag][i];
1107 float p = 0.5f;
1108 float q = 0.5f;
1109 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1110
1111 /* similar part for the q and p products */
1112 for (j = 0; j + 1 < order; j += 2) {
1113 q *= lsp[j] - two_cos_w;
1114 p *= lsp[j + 1] - two_cos_w;
1115 }
1116 if (j == order) { // even order
1117 p *= p * (2.0f - two_cos_w);
1118 q *= q * (2.0f + two_cos_w);
1119 } else { // odd order
1120 q *= two_cos_w-lsp[j]; // one more time for q
1121
1122 /* final step and square */
1123 p *= p * (4.f - two_cos_w * two_cos_w);
1124 q *= q;
1125 }
1126
1127 /* calculate linear floor value */
1128 q = exp((((amplitude*vf->amplitude_offset) /
1129 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1130 - vf->amplitude_offset) * .11512925f);
1131
1132 /* fill vector */
1133 do {
1134 vec[i] = q; ++i;
1135 } while (vf->map[blockflag][i] == iter_cond);
1136 }
1137 }
1138 } else {
1139 /* this channel is unused */
1140 return 1;
1141 }
1142
1143 av_dlog(NULL, " Floor0 decoded\n");
1144
1145 return 0;
1146 }
1147
1148 static int vorbis_floor1_decode(vorbis_context *vc,
1149 vorbis_floor_data *vfu, float *vec)
1150 {
1151 vorbis_floor1 *vf = &vfu->t1;
1152 GetBitContext *gb = &vc->gb;
1153 uint16_t range_v[4] = { 256, 128, 86, 64 };
1154 unsigned range = range_v[vf->multiplier - 1];
1155 uint16_t floor1_Y[258];
1156 uint16_t floor1_Y_final[258];
1157 int floor1_flag[258];
1158 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1159 int book, adx, ady, dy, off, predicted, err;
1160
1161
1162 if (!get_bits1(gb)) // silence
1163 return 1;
1164
1165 // Read values (or differences) for the floor's points
1166
1167 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1168 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1169
1170 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1171
1172 offset = 2;
1173 for (i = 0; i < vf->partitions; ++i) {
1174 class = vf->partition_class[i];
1175 cdim = vf->class_dimensions[class];
1176 cbits = vf->class_subclasses[class];
1177 csub = (1 << cbits) - 1;
1178 cval = 0;
1179
1180 av_dlog(NULL, "Cbits %u\n", cbits);
1181
1182 if (cbits) // this reads all subclasses for this partition's class
1183 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1184 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1185
1186 for (j = 0; j < cdim; ++j) {
1187 book = vf->subclass_books[class][cval & csub];
1188
1189 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1190 book, cbits, cval, get_bits_count(gb));
1191
1192 cval = cval >> cbits;
1193 if (book > -1) {
1194 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1195 vc->codebooks[book].nb_bits, 3);
1196 } else {
1197 floor1_Y[offset+j] = 0;
1198 }
1199
1200 av_dlog(NULL, " floor(%d) = %d \n",
1201 vf->list[offset+j].x, floor1_Y[offset+j]);
1202 }
1203 offset+=cdim;
1204 }
1205
1206 // Amplitude calculation from the differences
1207
1208 floor1_flag[0] = 1;
1209 floor1_flag[1] = 1;
1210 floor1_Y_final[0] = floor1_Y[0];
1211 floor1_Y_final[1] = floor1_Y[1];
1212
1213 for (i = 2; i < vf->x_list_dim; ++i) {
1214 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1215
1216 low_neigh_offs = vf->list[i].low;
1217 high_neigh_offs = vf->list[i].high;
1218 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1219 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1220 ady = FFABS(dy);
1221 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1222 off = err / adx;
1223 if (dy < 0) {
1224 predicted = floor1_Y_final[low_neigh_offs] - off;
1225 } else {
1226 predicted = floor1_Y_final[low_neigh_offs] + off;
1227 } // render_point end
1228
1229 val = floor1_Y[i];
1230 highroom = range-predicted;
1231 lowroom = predicted;
1232 if (highroom < lowroom) {
1233 room = highroom * 2;
1234 } else {
1235 room = lowroom * 2; // SPEC mispelling
1236 }
1237 if (val) {
1238 floor1_flag[low_neigh_offs] = 1;
1239 floor1_flag[high_neigh_offs] = 1;
1240 floor1_flag[i] = 1;
1241 if (val >= room) {
1242 if (highroom > lowroom) {
1243 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1244 } else {
1245 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1246 }
1247 } else {
1248 if (val & 1) {
1249 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1250 } else {
1251 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1252 }
1253 }
1254 } else {
1255 floor1_flag[i] = 0;
1256 floor1_Y_final[i] = av_clip_uint16(predicted);
1257 }
1258
1259 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1260 vf->list[i].x, floor1_Y_final[i], val);
1261 }
1262
1263 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1264
1265 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1266
1267 av_dlog(NULL, " Floor decoded\n");
1268
1269 return 0;
1270 }
1271
1272 // Read and decode residue
1273
1274 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1275 vorbis_residue *vr,
1276 unsigned ch,
1277 uint8_t *do_not_decode,
1278 float *vec,
1279 unsigned vlen,
1280 unsigned ch_left,
1281 int vr_type)
1282 {
1283 GetBitContext *gb = &vc->gb;
1284 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1285 unsigned ptns_to_read = vr->ptns_to_read;
1286 uint8_t *classifs = vr->classifs;
1287 unsigned pass, ch_used, i, j, k, l;
1288 unsigned max_output = (ch - 1) * vlen;
1289
1290 if (vr_type == 2) {
1291 for (j = 1; j < ch; ++j)
1292 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1293 if (do_not_decode[0])
1294 return 0;
1295 ch_used = 1;
1296 max_output += vr->end / ch;
1297 } else {
1298 ch_used = ch;
1299 max_output += vr->end;
1300 }
1301
1302 if (max_output > ch_left * vlen) {
1303 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1304 return -1;
1305 }
1306
1307 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1308
1309 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1310 uint16_t voffset, partition_count, j_times_ptns_to_read;
1311
1312 voffset = vr->begin;
1313 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1314 if (!pass) {
1315 unsigned inverse_class = ff_inverse[vr->classifications];
1316 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1317 if (!do_not_decode[j]) {
1318 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1319 vc->codebooks[vr->classbook].nb_bits, 3);
1320
1321 av_dlog(NULL, "Classword: %u\n", temp);
1322
1323 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1324 for (i = 0; i < c_p_c; ++i) {
1325 unsigned temp2;
1326
1327 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1328 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1329 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1330 temp = temp2;
1331 }
1332 }
1333 j_times_ptns_to_read += ptns_to_read;
1334 }
1335 }
1336 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1337 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1338 unsigned voffs;
1339
1340 if (!do_not_decode[j]) {
1341 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1342 int vqbook = vr->books[vqclass][pass];
1343
1344 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1345 unsigned coffs;
1346 unsigned dim = vc->codebooks[vqbook].dimensions;
1347 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1348 vorbis_codebook codebook = vc->codebooks[vqbook];
1349
1350 if (vr_type == 0) {
1351
1352 voffs = voffset+j*vlen;
1353 for (k = 0; k < step; ++k) {
1354 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1355 for (l = 0; l < dim; ++l)
1356 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1357 }
1358 } else if (vr_type == 1) {
1359 voffs = voffset + j * vlen;
1360 for (k = 0; k < step; ++k) {
1361 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1362 for (l = 0; l < dim; ++l, ++voffs) {
1363 vec[voffs]+=codebook.codevectors[coffs+l];
1364
1365 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1366 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1367 }
1368 }
1369 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1370 voffs = voffset >> 1;
1371
1372 if (dim == 2) {
1373 for (k = 0; k < step; ++k) {
1374 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1375 vec[voffs + k ] += codebook.codevectors[coffs ];
1376 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1377 }
1378 } else if (dim == 4) {
1379 for (k = 0; k < step; ++k, voffs += 2) {
1380 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1381 vec[voffs ] += codebook.codevectors[coffs ];
1382 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1383 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1384 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1385 }
1386 } else
1387 for (k = 0; k < step; ++k) {
1388 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1389 for (l = 0; l < dim; l += 2, voffs++) {
1390 vec[voffs ] += codebook.codevectors[coffs + l ];
1391 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1392
1393 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1394 pass, voffset / ch + (voffs % ch) * vlen,
1395 vec[voffset / ch + (voffs % ch) * vlen],
1396 codebook.codevectors[coffs + l], coffs, l);
1397 }
1398 }
1399
1400 } else if (vr_type == 2) {
1401 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1402 unsigned voffs_mod = voffset - voffs_div * ch;
1403
1404 for (k = 0; k < step; ++k) {
1405 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1406 for (l = 0; l < dim; ++l) {
1407 vec[voffs_div + voffs_mod * vlen] +=
1408 codebook.codevectors[coffs + l];
1409
1410 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1411 pass, voffs_div + voffs_mod * vlen,
1412 vec[voffs_div + voffs_mod * vlen],
1413 codebook.codevectors[coffs + l], coffs, l);
1414
1415 if (++voffs_mod == ch) {
1416 voffs_div++;
1417 voffs_mod = 0;
1418 }
1419 }
1420 }
1421 }
1422 }
1423 }
1424 j_times_ptns_to_read += ptns_to_read;
1425 }
1426 ++partition_count;
1427 voffset += vr->partition_size;
1428 }
1429 }
1430 }
1431 return 0;
1432 }
1433
1434 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1435 unsigned ch,
1436 uint8_t *do_not_decode,
1437 float *vec, unsigned vlen,
1438 unsigned ch_left)
1439 {
1440 if (vr->type == 2)
1441 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1442 else if (vr->type == 1)
1443 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1444 else if (vr->type == 0)
1445 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1446 else {
1447 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1448 return AVERROR_INVALIDDATA;
1449 }
1450 }
1451
1452 void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1453 {
1454 int i;
1455 for (i = 0; i < blocksize; i++) {
1456 if (mag[i] > 0.0) {
1457 if (ang[i] > 0.0) {
1458 ang[i] = mag[i] - ang[i];
1459 } else {
1460 float temp = ang[i];
1461 ang[i] = mag[i];
1462 mag[i] += temp;
1463 }
1464 } else {
1465 if (ang[i] > 0.0) {
1466 ang[i] += mag[i];
1467 } else {
1468 float temp = ang[i];
1469 ang[i] = mag[i];
1470 mag[i] -= temp;
1471 }
1472 }
1473 }
1474 }
1475
1476 // Decode the audio packet using the functions above
1477
1478 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1479 {
1480 GetBitContext *gb = &vc->gb;
1481 FFTContext *mdct;
1482 unsigned previous_window = vc->previous_window;
1483 unsigned mode_number, blockflag, blocksize;
1484 int i, j;
1485 uint8_t no_residue[255];
1486 uint8_t do_not_decode[255];
1487 vorbis_mapping *mapping;
1488 float *ch_res_ptr = vc->channel_residues;
1489 uint8_t res_chan[255];
1490 unsigned res_num = 0;
1491 int retlen = 0;
1492 unsigned ch_left = vc->audio_channels;
1493 unsigned vlen;
1494
1495 if (get_bits1(gb)) {
1496 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1497 return AVERROR_INVALIDDATA; // packet type not audio
1498 }
1499
1500 if (vc->mode_count == 1) {
1501 mode_number = 0;
1502 } else {
1503 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1504 }
1505 vc->mode_number = mode_number;
1506 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1507
1508 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1509 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1510
1511 blockflag = vc->modes[mode_number].blockflag;
1512 blocksize = vc->blocksize[blockflag];
1513 vlen = blocksize / 2;
1514 if (blockflag) {
1515 previous_window = get_bits(gb, 1);
1516 skip_bits1(gb); // next_window
1517 }
1518
1519 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1520 for (i = 0; i < vc->audio_channels; ++i)
1521 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1522
1523 // Decode floor
1524
1525 for (i = 0; i < vc->audio_channels; ++i) {
1526 vorbis_floor *floor;
1527 int ret;
1528 if (mapping->submaps > 1) {
1529 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1530 } else {
1531 floor = &vc->floors[mapping->submap_floor[0]];
1532 }
1533
1534 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1535
1536 if (ret < 0) {
1537 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1538 return AVERROR_INVALIDDATA;
1539 }
1540 no_residue[i] = ret;
1541 }
1542
1543 // Nonzero vector propagate
1544
1545 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1546 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1547 no_residue[mapping->magnitude[i]] = 0;
1548 no_residue[mapping->angle[i]] = 0;
1549 }
1550 }
1551
1552 // Decode residue
1553
1554 for (i = 0; i < mapping->submaps; ++i) {
1555 vorbis_residue *residue;
1556 unsigned ch = 0;
1557 int ret;
1558
1559 for (j = 0; j < vc->audio_channels; ++j) {
1560 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1561 res_chan[j] = res_num;
1562 if (no_residue[j]) {
1563 do_not_decode[ch] = 1;
1564 } else {
1565 do_not_decode[ch] = 0;
1566 }
1567 ++ch;
1568 ++res_num;
1569 }
1570 }
1571 residue = &vc->residues[mapping->submap_residue[i]];
1572 if (ch_left < ch) {
1573 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1574 return -1;
1575 }
1576 if (ch) {
1577 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1578 if (ret < 0)
1579 return ret;
1580 }
1581
1582 ch_res_ptr += ch * vlen;
1583 ch_left -= ch;
1584 }
1585
1586 if (ch_left > 0)
1587 return AVERROR_INVALIDDATA;
1588
1589 // Inverse coupling
1590
1591 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1592 float *mag, *ang;
1593
1594 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1595 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1596 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1597 }
1598
1599 // Dotproduct, MDCT
1600
1601 mdct = &vc->mdct[blockflag];
1602
1603 for (j = vc->audio_channels-1;j >= 0; j--) {
1604 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1605 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1606 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1607 }
1608
1609 // Overlap/add, save data for next overlapping
1610
1611 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1612 for (j = 0; j < vc->audio_channels; j++) {
1613 unsigned bs0 = vc->blocksize[0];
1614 unsigned bs1 = vc->blocksize[1];
1615 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1616 float *saved = vc->saved + j * bs1 / 4;
1617 float *ret = floor_ptr[j];
1618 float *buf = residue;
1619 const float *win = vc->win[blockflag & previous_window];
1620
1621 if (blockflag == previous_window) {
1622 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1623 } else if (blockflag > previous_window) {
1624 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1625 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1626 } else {
1627 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1628 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1629 }
1630 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1631 }
1632
1633 vc->previous_window = blockflag;
1634 return retlen;
1635 }
1636
1637 // Return the decoded audio packet through the standard api
1638
1639 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1640 int *got_frame_ptr, AVPacket *avpkt)
1641 {
1642 const uint8_t *buf = avpkt->data;
1643 int buf_size = avpkt->size;
1644 vorbis_context *vc = avccontext->priv_data;
1645 GetBitContext *gb = &vc->gb;
1646 float *channel_ptrs[255];
1647 int i, len, ret;
1648
1649 av_dlog(NULL, "packet length %d \n", buf_size);
1650
1651 /* get output buffer */
1652 vc->frame.nb_samples = vc->blocksize[1] / 2;
1653 if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
1654 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1655 return ret;
1656 }
1657
1658 if (vc->audio_channels > 8) {
1659 for (i = 0; i < vc->audio_channels; i++)
1660 channel_ptrs[i] = (float *)vc->frame.extended_data[i];
1661 } else {
1662 for (i = 0; i < vc->audio_channels; i++) {
1663 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1664 channel_ptrs[ch] = (float *)vc->frame.extended_data[i];
1665 }
1666 }
1667
1668 init_get_bits(gb, buf, buf_size*8);
1669
1670 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1671 return len;
1672
1673 if (!vc->first_frame) {
1674 vc->first_frame = 1;
1675 *got_frame_ptr = 0;
1676 return buf_size;
1677 }
1678
1679 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1680 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1681
1682 vc->frame.nb_samples = len;
1683 *got_frame_ptr = 1;
1684 *(AVFrame *)data = vc->frame;
1685
1686 return buf_size;
1687 }
1688
1689 // Close decoder
1690
1691 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1692 {
1693 vorbis_context *vc = avccontext->priv_data;
1694
1695 vorbis_free(vc);
1696
1697 return 0;
1698 }
1699
1700 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1701 {
1702 vorbis_context *vc = avccontext->priv_data;
1703
1704 if (vc->saved) {
1705 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1706 sizeof(*vc->saved));
1707 }
1708 vc->previous_window = 0;
1709 }
1710
1711 AVCodec ff_vorbis_decoder = {
1712 .name = "vorbis",
1713 .type = AVMEDIA_TYPE_AUDIO,
1714 .id = AV_CODEC_ID_VORBIS,
1715 .priv_data_size = sizeof(vorbis_context),
1716 .init = vorbis_decode_init,
1717 .close = vorbis_decode_close,
1718 .decode = vorbis_decode_frame,
1719 .flush = vorbis_decode_flush,
1720 .capabilities = CODEC_CAP_DR1,
1721 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1722 .channel_layouts = ff_vorbis_channel_layouts,
1723 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1724 AV_SAMPLE_FMT_NONE },
1725 };