e79feb90c6e1ecf75fa9cf3fa0e771c84bc9f3e1
[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 ALT_BITSTREAM_READER_LE
29 #include "avcodec.h"
30 #include "get_bits.h"
31 #include "dsputil.h"
32 #include "fft.h"
33 #include "fmtconvert.h"
34
35 #include "vorbis.h"
36 #include "xiph.h"
37
38 #define V_NB_BITS 8
39 #define V_NB_BITS2 11
40 #define V_MAX_VLCS (1 << 16)
41 #define V_MAX_PARTITIONS (1 << 20)
42
43 #undef NDEBUG
44 #include <assert.h>
45
46 typedef struct {
47 uint8_t dimensions;
48 uint8_t lookup_type;
49 uint8_t maxdepth;
50 VLC vlc;
51 float *codevectors;
52 unsigned int nb_bits;
53 } vorbis_codebook;
54
55 typedef union vorbis_floor_u vorbis_floor_data;
56 typedef struct vorbis_floor0_s vorbis_floor0;
57 typedef struct vorbis_floor1_s vorbis_floor1;
58 struct vorbis_context_s;
59 typedef
60 int (* vorbis_floor_decode_func)
61 (struct vorbis_context_s *, vorbis_floor_data *, float *);
62 typedef struct {
63 uint8_t floor_type;
64 vorbis_floor_decode_func decode;
65 union vorbis_floor_u {
66 struct vorbis_floor0_s {
67 uint8_t order;
68 uint16_t rate;
69 uint16_t bark_map_size;
70 int32_t *map[2];
71 uint32_t map_size[2];
72 uint8_t amplitude_bits;
73 uint8_t amplitude_offset;
74 uint8_t num_books;
75 uint8_t *book_list;
76 float *lsp;
77 } t0;
78 struct vorbis_floor1_s {
79 uint8_t partitions;
80 uint8_t partition_class[32];
81 uint8_t class_dimensions[16];
82 uint8_t class_subclasses[16];
83 uint8_t class_masterbook[16];
84 int16_t subclass_books[16][8];
85 uint8_t multiplier;
86 uint16_t x_list_dim;
87 vorbis_floor1_entry *list;
88 } t1;
89 } data;
90 } vorbis_floor;
91
92 typedef struct {
93 uint16_t type;
94 uint32_t begin;
95 uint32_t end;
96 unsigned partition_size;
97 uint8_t classifications;
98 uint8_t classbook;
99 int16_t books[64][8];
100 uint8_t maxpass;
101 uint16_t ptns_to_read;
102 uint8_t *classifs;
103 } vorbis_residue;
104
105 typedef struct {
106 uint8_t submaps;
107 uint16_t coupling_steps;
108 uint8_t *magnitude;
109 uint8_t *angle;
110 uint8_t *mux;
111 uint8_t submap_floor[16];
112 uint8_t submap_residue[16];
113 } vorbis_mapping;
114
115 typedef struct {
116 uint8_t blockflag;
117 uint16_t windowtype;
118 uint16_t transformtype;
119 uint8_t mapping;
120 } vorbis_mode;
121
122 typedef struct vorbis_context_s {
123 AVCodecContext *avccontext;
124 GetBitContext gb;
125 DSPContext dsp;
126 FmtConvertContext fmt_conv;
127
128 FFTContext mdct[2];
129 uint8_t first_frame;
130 uint32_t version;
131 uint8_t audio_channels;
132 uint32_t audio_samplerate;
133 uint32_t bitrate_maximum;
134 uint32_t bitrate_nominal;
135 uint32_t bitrate_minimum;
136 uint32_t blocksize[2];
137 const float *win[2];
138 uint16_t codebook_count;
139 vorbis_codebook *codebooks;
140 uint8_t floor_count;
141 vorbis_floor *floors;
142 uint8_t residue_count;
143 vorbis_residue *residues;
144 uint8_t mapping_count;
145 vorbis_mapping *mappings;
146 uint8_t mode_count;
147 vorbis_mode *modes;
148 uint8_t mode_number; // mode number for the current packet
149 uint8_t previous_window;
150 float *channel_residues;
151 float *channel_floors;
152 float *saved;
153 float scale_bias; // for float->int conversion
154 } vorbis_context;
155
156 /* Helper functions */
157
158 #define BARK(x) \
159 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
160
161 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
162 #define VALIDATE_INDEX(idx, limit) \
163 if (idx >= limit) {\
164 av_log(vc->avccontext, AV_LOG_ERROR,\
165 idx_err_str,\
166 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
167 return AVERROR_INVALIDDATA;\
168 }
169 #define GET_VALIDATED_INDEX(idx, bits, limit) \
170 {\
171 idx = get_bits(gb, bits);\
172 VALIDATE_INDEX(idx, limit)\
173 }
174
175 static float vorbisfloat2float(unsigned val)
176 {
177 double mant = val & 0x1fffff;
178 long exp = (val & 0x7fe00000L) >> 21;
179 if (val & 0x80000000)
180 mant = -mant;
181 return ldexp(mant, exp - 20 - 768);
182 }
183
184
185 // Free all allocated memory -----------------------------------------
186
187 static void vorbis_free(vorbis_context *vc)
188 {
189 int i;
190
191 av_freep(&vc->channel_residues);
192 av_freep(&vc->channel_floors);
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 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 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
577 } else if (floor_setup->floor_type == 0) {
578 unsigned max_codebook_dim = 0;
579
580 floor_setup->decode = vorbis_floor0_decode;
581
582 floor_setup->data.t0.order = get_bits(gb, 8);
583 floor_setup->data.t0.rate = get_bits(gb, 16);
584 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
585 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
586 /* zero would result in a div by zero later *
587 * 2^0 - 1 == 0 */
588 if (floor_setup->data.t0.amplitude_bits == 0) {
589 av_log(vc->avccontext, AV_LOG_ERROR,
590 "Floor 0 amplitude bits is 0.\n");
591 return AVERROR_INVALIDDATA;
592 }
593 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
594 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
595
596 /* allocate mem for booklist */
597 floor_setup->data.t0.book_list =
598 av_malloc(floor_setup->data.t0.num_books);
599 if (!floor_setup->data.t0.book_list)
600 return AVERROR(ENOMEM);
601 /* read book indexes */
602 {
603 int idx;
604 unsigned book_idx;
605 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
606 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
607 floor_setup->data.t0.book_list[idx] = book_idx;
608 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
609 max_codebook_dim = vc->codebooks[book_idx].dimensions;
610 }
611 }
612
613 create_map(vc, i);
614
615 /* codebook dim is for padding if codebook dim doesn't *
616 * divide order+1 then we need to read more data */
617 floor_setup->data.t0.lsp =
618 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
619 * sizeof(*floor_setup->data.t0.lsp));
620 if (!floor_setup->data.t0.lsp)
621 return AVERROR(ENOMEM);
622
623 /* debug output parsed headers */
624 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
625 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
626 av_dlog(NULL, "floor0 bark map size: %u\n",
627 floor_setup->data.t0.bark_map_size);
628 av_dlog(NULL, "floor0 amplitude bits: %u\n",
629 floor_setup->data.t0.amplitude_bits);
630 av_dlog(NULL, "floor0 amplitude offset: %u\n",
631 floor_setup->data.t0.amplitude_offset);
632 av_dlog(NULL, "floor0 number of books: %u\n",
633 floor_setup->data.t0.num_books);
634 av_dlog(NULL, "floor0 book list pointer: %p\n",
635 floor_setup->data.t0.book_list);
636 {
637 int idx;
638 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
639 av_dlog(NULL, " Book %d: %u\n", idx + 1,
640 floor_setup->data.t0.book_list[idx]);
641 }
642 }
643 } else {
644 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
645 return AVERROR_INVALIDDATA;
646 }
647 }
648 return 0;
649 }
650
651 // Process residues part
652
653 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
654 {
655 GetBitContext *gb = &vc->gb;
656 unsigned i, j, k;
657
658 vc->residue_count = get_bits(gb, 6)+1;
659 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
660
661 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
662
663 for (i = 0; i < vc->residue_count; ++i) {
664 vorbis_residue *res_setup = &vc->residues[i];
665 uint8_t cascade[64];
666 unsigned high_bits, low_bits;
667
668 res_setup->type = get_bits(gb, 16);
669
670 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
671
672 res_setup->begin = get_bits(gb, 24);
673 res_setup->end = get_bits(gb, 24);
674 res_setup->partition_size = get_bits(gb, 24) + 1;
675 /* Validations to prevent a buffer overflow later. */
676 if (res_setup->begin>res_setup->end ||
677 res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
678 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
679 av_log(vc->avccontext, AV_LOG_ERROR,
680 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
681 res_setup->type, res_setup->begin, res_setup->end,
682 res_setup->partition_size, vc->blocksize[1] / 2);
683 return AVERROR_INVALIDDATA;
684 }
685
686 res_setup->classifications = get_bits(gb, 6) + 1;
687 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
688
689 res_setup->ptns_to_read =
690 (res_setup->end - res_setup->begin) / res_setup->partition_size;
691 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
692 vc->audio_channels *
693 sizeof(*res_setup->classifs));
694 if (!res_setup->classifs)
695 return AVERROR(ENOMEM);
696
697 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
698 res_setup->begin, res_setup->end, res_setup->partition_size,
699 res_setup->classifications, res_setup->classbook);
700
701 for (j = 0; j < res_setup->classifications; ++j) {
702 high_bits = 0;
703 low_bits = get_bits(gb, 3);
704 if (get_bits1(gb))
705 high_bits = get_bits(gb, 5);
706 cascade[j] = (high_bits << 3) + low_bits;
707
708 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
709 }
710
711 res_setup->maxpass = 0;
712 for (j = 0; j < res_setup->classifications; ++j) {
713 for (k = 0; k < 8; ++k) {
714 if (cascade[j]&(1 << k)) {
715 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
716
717 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
718 j, k, res_setup->books[j][k]);
719
720 if (k>res_setup->maxpass)
721 res_setup->maxpass = k;
722 } else {
723 res_setup->books[j][k] = -1;
724 }
725 }
726 }
727 }
728 return 0;
729 }
730
731 // Process mappings part
732
733 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
734 {
735 GetBitContext *gb = &vc->gb;
736 unsigned i, j;
737
738 vc->mapping_count = get_bits(gb, 6)+1;
739 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
740
741 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
742
743 for (i = 0; i < vc->mapping_count; ++i) {
744 vorbis_mapping *mapping_setup = &vc->mappings[i];
745
746 if (get_bits(gb, 16)) {
747 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
748 return AVERROR_INVALIDDATA;
749 }
750 if (get_bits1(gb)) {
751 mapping_setup->submaps = get_bits(gb, 4) + 1;
752 } else {
753 mapping_setup->submaps = 1;
754 }
755
756 if (get_bits1(gb)) {
757 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
758 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
759 sizeof(*mapping_setup->magnitude));
760 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
761 sizeof(*mapping_setup->angle));
762 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
763 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
764 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
765 }
766 } else {
767 mapping_setup->coupling_steps = 0;
768 }
769
770 av_dlog(NULL, " %u mapping coupling steps: %d\n",
771 i, mapping_setup->coupling_steps);
772
773 if (get_bits(gb, 2)) {
774 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
775 return AVERROR_INVALIDDATA; // following spec.
776 }
777
778 if (mapping_setup->submaps>1) {
779 mapping_setup->mux = av_mallocz(vc->audio_channels *
780 sizeof(*mapping_setup->mux));
781 for (j = 0; j < vc->audio_channels; ++j)
782 mapping_setup->mux[j] = get_bits(gb, 4);
783 }
784
785 for (j = 0; j < mapping_setup->submaps; ++j) {
786 skip_bits(gb, 8); // FIXME check?
787 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
788 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
789
790 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
791 mapping_setup->submap_floor[j],
792 mapping_setup->submap_residue[j]);
793 }
794 }
795 return 0;
796 }
797
798 // Process modes part
799
800 static void create_map(vorbis_context *vc, unsigned floor_number)
801 {
802 vorbis_floor *floors = vc->floors;
803 vorbis_floor0 *vf;
804 int idx;
805 int blockflag, n;
806 int32_t *map;
807
808 for (blockflag = 0; blockflag < 2; ++blockflag) {
809 n = vc->blocksize[blockflag] / 2;
810 floors[floor_number].data.t0.map[blockflag] =
811 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
812
813 map = floors[floor_number].data.t0.map[blockflag];
814 vf = &floors[floor_number].data.t0;
815
816 for (idx = 0; idx < n; ++idx) {
817 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
818 ((vf->bark_map_size) /
819 BARK(vf->rate / 2.0f)));
820 if (vf->bark_map_size-1 < map[idx])
821 map[idx] = vf->bark_map_size - 1;
822 }
823 map[n] = -1;
824 vf->map_size[blockflag] = n;
825 }
826
827 for (idx = 0; idx <= n; ++idx) {
828 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
829 }
830 }
831
832 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
833 {
834 GetBitContext *gb = &vc->gb;
835 unsigned i;
836
837 vc->mode_count = get_bits(gb, 6) + 1;
838 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
839
840 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
841
842 for (i = 0; i < vc->mode_count; ++i) {
843 vorbis_mode *mode_setup = &vc->modes[i];
844
845 mode_setup->blockflag = get_bits1(gb);
846 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
847 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
848 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
849
850 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
851 i, mode_setup->blockflag, mode_setup->windowtype,
852 mode_setup->transformtype, mode_setup->mapping);
853 }
854 return 0;
855 }
856
857 // Process the whole setup header using the functions above
858
859 static int vorbis_parse_setup_hdr(vorbis_context *vc)
860 {
861 GetBitContext *gb = &vc->gb;
862 int ret;
863
864 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
865 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
866 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
868 return AVERROR_INVALIDDATA;
869 }
870
871 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
873 return ret;
874 }
875 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
876 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
877 return ret;
878 }
879 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
881 return ret;
882 }
883 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
885 return ret;
886 }
887 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
889 return ret;
890 }
891 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
893 return ret;
894 }
895 if (!get_bits1(gb)) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
897 return AVERROR_INVALIDDATA; // framing flag bit unset error
898 }
899
900 return 0;
901 }
902
903 // Process the identification header
904
905 static int vorbis_parse_id_hdr(vorbis_context *vc)
906 {
907 GetBitContext *gb = &vc->gb;
908 unsigned bl0, bl1;
909
910 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
911 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
912 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
913 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
914 return AVERROR_INVALIDDATA;
915 }
916
917 vc->version = get_bits_long(gb, 32); //FIXME check 0
918 vc->audio_channels = get_bits(gb, 8);
919 if (vc->audio_channels <= 0) {
920 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
921 return AVERROR_INVALIDDATA;
922 }
923 vc->audio_samplerate = get_bits_long(gb, 32);
924 if (vc->audio_samplerate <= 0) {
925 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
926 return AVERROR_INVALIDDATA;
927 }
928 vc->bitrate_maximum = get_bits_long(gb, 32);
929 vc->bitrate_nominal = get_bits_long(gb, 32);
930 vc->bitrate_minimum = get_bits_long(gb, 32);
931 bl0 = get_bits(gb, 4);
932 bl1 = get_bits(gb, 4);
933 vc->blocksize[0] = (1 << bl0);
934 vc->blocksize[1] = (1 << bl1);
935 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
936 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
937 return AVERROR_INVALIDDATA;
938 }
939 // output format int16
940 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
941 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
942 "output packets too large.\n");
943 return AVERROR_PATCHWELCOME;
944 }
945 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
946 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
947
948 if ((get_bits1(gb)) == 0) {
949 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
950 return AVERROR_INVALIDDATA;
951 }
952
953 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
954 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
955 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
956 vc->previous_window = 0;
957
958 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
959 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
960
961 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 ",
962 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
963
964 /*
965 BLK = vc->blocksize[0];
966 for (i = 0; i < BLK / 2; ++i) {
967 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)));
968 }
969 */
970
971 return 0;
972 }
973
974 // Process the extradata using the functions above (identification header, setup header)
975
976 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
977 {
978 vorbis_context *vc = avccontext->priv_data;
979 uint8_t *headers = avccontext->extradata;
980 int headers_len = avccontext->extradata_size;
981 uint8_t *header_start[3];
982 int header_len[3];
983 GetBitContext *gb = &(vc->gb);
984 int hdr_type, ret;
985
986 vc->avccontext = avccontext;
987 dsputil_init(&vc->dsp, avccontext);
988 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
989
990 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
991 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
992 vc->scale_bias = 1.0f;
993 } else {
994 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
995 vc->scale_bias = 32768.0f;
996 }
997
998 if (!headers_len) {
999 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
1000 return AVERROR_INVALIDDATA;
1001 }
1002
1003 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1004 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1005 return ret;
1006 }
1007
1008 init_get_bits(gb, header_start[0], header_len[0]*8);
1009 hdr_type = get_bits(gb, 8);
1010 if (hdr_type != 1) {
1011 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1012 return AVERROR_INVALIDDATA;
1013 }
1014 if ((ret = vorbis_parse_id_hdr(vc))) {
1015 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1016 vorbis_free(vc);
1017 return ret;
1018 }
1019
1020 init_get_bits(gb, header_start[2], header_len[2]*8);
1021 hdr_type = get_bits(gb, 8);
1022 if (hdr_type != 5) {
1023 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1024 vorbis_free(vc);
1025 return AVERROR_INVALIDDATA;
1026 }
1027 if ((ret = vorbis_parse_setup_hdr(vc))) {
1028 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1029 vorbis_free(vc);
1030 return ret;
1031 }
1032
1033 if (vc->audio_channels > 8)
1034 avccontext->channel_layout = 0;
1035 else
1036 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1037
1038 avccontext->channels = vc->audio_channels;
1039 avccontext->sample_rate = vc->audio_samplerate;
1040 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1041
1042 return 0;
1043 }
1044
1045 // Decode audiopackets -------------------------------------------------
1046
1047 // Read and decode floor
1048
1049 static int vorbis_floor0_decode(vorbis_context *vc,
1050 vorbis_floor_data *vfu, float *vec)
1051 {
1052 vorbis_floor0 *vf = &vfu->t0;
1053 float *lsp = vf->lsp;
1054 unsigned amplitude, book_idx;
1055 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1056
1057 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1058 if (amplitude > 0) {
1059 float last = 0;
1060 unsigned idx, lsp_len = 0;
1061 vorbis_codebook codebook;
1062
1063 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1064 if (book_idx >= vf->num_books) {
1065 av_log(vc->avccontext, AV_LOG_ERROR,
1066 "floor0 dec: booknumber too high!\n");
1067 book_idx = 0;
1068 }
1069 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1070 codebook = vc->codebooks[vf->book_list[book_idx]];
1071 /* Invalid codebook! */
1072 if (!codebook.codevectors)
1073 return AVERROR_INVALIDDATA;
1074
1075 while (lsp_len<vf->order) {
1076 int vec_off;
1077
1078 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1079 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1080 /* read temp vector */
1081 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1082 codebook.nb_bits, codebook.maxdepth)
1083 * codebook.dimensions;
1084 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1085 /* copy each vector component and add last to it */
1086 for (idx = 0; idx < codebook.dimensions; ++idx)
1087 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1088 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1089
1090 lsp_len += codebook.dimensions;
1091 }
1092 /* DEBUG: output lsp coeffs */
1093 {
1094 int idx;
1095 for (idx = 0; idx < lsp_len; ++idx)
1096 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1097 }
1098
1099 /* synthesize floor output vector */
1100 {
1101 int i;
1102 int order = vf->order;
1103 float wstep = M_PI / vf->bark_map_size;
1104
1105 for (i = 0; i < order; i++)
1106 lsp[i] = 2.0f * cos(lsp[i]);
1107
1108 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1109 vf->map_size[blockflag], order, wstep);
1110
1111 i = 0;
1112 while (i < vf->map_size[blockflag]) {
1113 int j, iter_cond = vf->map[blockflag][i];
1114 float p = 0.5f;
1115 float q = 0.5f;
1116 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1117
1118 /* similar part for the q and p products */
1119 for (j = 0; j + 1 < order; j += 2) {
1120 q *= lsp[j] - two_cos_w;
1121 p *= lsp[j + 1] - two_cos_w;
1122 }
1123 if (j == order) { // even order
1124 p *= p * (2.0f - two_cos_w);
1125 q *= q * (2.0f + two_cos_w);
1126 } else { // odd order
1127 q *= two_cos_w-lsp[j]; // one more time for q
1128
1129 /* final step and square */
1130 p *= p * (4.f - two_cos_w * two_cos_w);
1131 q *= q;
1132 }
1133
1134 /* calculate linear floor value */
1135 q = exp((((amplitude*vf->amplitude_offset) /
1136 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1137 - vf->amplitude_offset) * .11512925f);
1138
1139 /* fill vector */
1140 do {
1141 vec[i] = q; ++i;
1142 } while (vf->map[blockflag][i] == iter_cond);
1143 }
1144 }
1145 } else {
1146 /* this channel is unused */
1147 return 1;
1148 }
1149
1150 av_dlog(NULL, " Floor0 decoded\n");
1151
1152 return 0;
1153 }
1154
1155 static int vorbis_floor1_decode(vorbis_context *vc,
1156 vorbis_floor_data *vfu, float *vec)
1157 {
1158 vorbis_floor1 *vf = &vfu->t1;
1159 GetBitContext *gb = &vc->gb;
1160 uint16_t range_v[4] = { 256, 128, 86, 64 };
1161 unsigned range = range_v[vf->multiplier - 1];
1162 uint16_t floor1_Y[258];
1163 uint16_t floor1_Y_final[258];
1164 int floor1_flag[258];
1165 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1166 int book, adx, ady, dy, off, predicted, err;
1167
1168
1169 if (!get_bits1(gb)) // silence
1170 return 1;
1171
1172 // Read values (or differences) for the floor's points
1173
1174 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1175 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1176
1177 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1178
1179 offset = 2;
1180 for (i = 0; i < vf->partitions; ++i) {
1181 class = vf->partition_class[i];
1182 cdim = vf->class_dimensions[class];
1183 cbits = vf->class_subclasses[class];
1184 csub = (1 << cbits) - 1;
1185 cval = 0;
1186
1187 av_dlog(NULL, "Cbits %u\n", cbits);
1188
1189 if (cbits) // this reads all subclasses for this partition's class
1190 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1191 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1192
1193 for (j = 0; j < cdim; ++j) {
1194 book = vf->subclass_books[class][cval & csub];
1195
1196 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1197 book, cbits, cval, get_bits_count(gb));
1198
1199 cval = cval >> cbits;
1200 if (book > -1) {
1201 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1202 vc->codebooks[book].nb_bits, 3);
1203 } else {
1204 floor1_Y[offset+j] = 0;
1205 }
1206
1207 av_dlog(NULL, " floor(%d) = %d \n",
1208 vf->list[offset+j].x, floor1_Y[offset+j]);
1209 }
1210 offset+=cdim;
1211 }
1212
1213 // Amplitude calculation from the differences
1214
1215 floor1_flag[0] = 1;
1216 floor1_flag[1] = 1;
1217 floor1_Y_final[0] = floor1_Y[0];
1218 floor1_Y_final[1] = floor1_Y[1];
1219
1220 for (i = 2; i < vf->x_list_dim; ++i) {
1221 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1222
1223 low_neigh_offs = vf->list[i].low;
1224 high_neigh_offs = vf->list[i].high;
1225 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1226 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1227 ady = FFABS(dy);
1228 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1229 off = err / adx;
1230 if (dy < 0) {
1231 predicted = floor1_Y_final[low_neigh_offs] - off;
1232 } else {
1233 predicted = floor1_Y_final[low_neigh_offs] + off;
1234 } // render_point end
1235
1236 val = floor1_Y[i];
1237 highroom = range-predicted;
1238 lowroom = predicted;
1239 if (highroom < lowroom) {
1240 room = highroom * 2;
1241 } else {
1242 room = lowroom * 2; // SPEC mispelling
1243 }
1244 if (val) {
1245 floor1_flag[low_neigh_offs] = 1;
1246 floor1_flag[high_neigh_offs] = 1;
1247 floor1_flag[i] = 1;
1248 if (val >= room) {
1249 if (highroom > lowroom) {
1250 floor1_Y_final[i] = val - lowroom + predicted;
1251 } else {
1252 floor1_Y_final[i] = predicted - val + highroom - 1;
1253 }
1254 } else {
1255 if (val & 1) {
1256 floor1_Y_final[i] = predicted - (val + 1) / 2;
1257 } else {
1258 floor1_Y_final[i] = predicted + val / 2;
1259 }
1260 }
1261 } else {
1262 floor1_flag[i] = 0;
1263 floor1_Y_final[i] = predicted;
1264 }
1265
1266 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1267 vf->list[i].x, floor1_Y_final[i], val);
1268 }
1269
1270 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1271
1272 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1273
1274 av_dlog(NULL, " Floor decoded\n");
1275
1276 return 0;
1277 }
1278
1279 // Read and decode residue
1280
1281 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1282 vorbis_residue *vr,
1283 unsigned ch,
1284 uint8_t *do_not_decode,
1285 float *vec,
1286 unsigned vlen,
1287 int vr_type)
1288 {
1289 GetBitContext *gb = &vc->gb;
1290 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1291 unsigned ptns_to_read = vr->ptns_to_read;
1292 uint8_t *classifs = vr->classifs;
1293 unsigned pass, ch_used, i, j, k, l;
1294
1295 if (vr_type == 2) {
1296 for (j = 1; j < ch; ++j)
1297 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1298 if (do_not_decode[0])
1299 return 0;
1300 ch_used = 1;
1301 } else {
1302 ch_used = ch;
1303 }
1304
1305 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1306
1307 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1308 uint16_t voffset, partition_count, j_times_ptns_to_read;
1309
1310 voffset = vr->begin;
1311 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1312 if (!pass) {
1313 unsigned inverse_class = ff_inverse[vr->classifications];
1314 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1315 if (!do_not_decode[j]) {
1316 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1317 vc->codebooks[vr->classbook].nb_bits, 3);
1318
1319 av_dlog(NULL, "Classword: %u\n", temp);
1320
1321 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1322 for (i = 0; i < c_p_c; ++i) {
1323 unsigned temp2;
1324
1325 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1326 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1327 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1328 temp = temp2;
1329 }
1330 }
1331 j_times_ptns_to_read += ptns_to_read;
1332 }
1333 }
1334 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1335 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1336 unsigned voffs;
1337
1338 if (!do_not_decode[j]) {
1339 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1340 int vqbook = vr->books[vqclass][pass];
1341
1342 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1343 unsigned coffs;
1344 unsigned dim = vc->codebooks[vqbook].dimensions;
1345 unsigned step = dim == 1 ? vr->partition_size
1346 : FASTDIV(vr->partition_size, dim);
1347 vorbis_codebook codebook = vc->codebooks[vqbook];
1348
1349 if (vr_type == 0) {
1350
1351 voffs = voffset+j*vlen;
1352 for (k = 0; k < step; ++k) {
1353 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1354 for (l = 0; l < dim; ++l)
1355 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1356 }
1357 } else if (vr_type == 1) {
1358 voffs = voffset + j * vlen;
1359 for (k = 0; k < step; ++k) {
1360 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1361 for (l = 0; l < dim; ++l, ++voffs) {
1362 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1363
1364 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1365 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1366 }
1367 }
1368 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1369 voffs = voffset >> 1;
1370
1371 if (dim == 2) {
1372 for (k = 0; k < step; ++k) {
1373 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1374 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1375 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1376 }
1377 } else if (dim == 4) {
1378 for (k = 0; k < step; ++k, voffs += 2) {
1379 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1380 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1381 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1382 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1383 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1384 }
1385 } else
1386 for (k = 0; k < step; ++k) {
1387 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1388 for (l = 0; l < dim; l += 2, voffs++) {
1389 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1390 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1391
1392 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1393 pass, voffset / ch + (voffs % ch) * vlen,
1394 vec[voffset / ch + (voffs % ch) * vlen],
1395 codebook.codevectors[coffs + l], coffs, l);
1396 }
1397 }
1398
1399 } else if (vr_type == 2) {
1400 voffs = voffset;
1401
1402 for (k = 0; k < step; ++k) {
1403 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1404 for (l = 0; l < dim; ++l, ++voffs) {
1405 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1406
1407 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1408 pass, voffset / ch + (voffs % ch) * vlen,
1409 vec[voffset / ch + (voffs % ch) * vlen],
1410 codebook.codevectors[coffs + l], coffs, l);
1411 }
1412 }
1413 }
1414 }
1415 }
1416 j_times_ptns_to_read += ptns_to_read;
1417 }
1418 ++partition_count;
1419 voffset += vr->partition_size;
1420 }
1421 }
1422 }
1423 return 0;
1424 }
1425
1426 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1427 unsigned ch,
1428 uint8_t *do_not_decode,
1429 float *vec, unsigned vlen)
1430 {
1431 if (vr->type == 2)
1432 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1433 else if (vr->type == 1)
1434 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1435 else if (vr->type == 0)
1436 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1437 else {
1438 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1439 return AVERROR_INVALIDDATA;
1440 }
1441 }
1442
1443 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1444 {
1445 int i;
1446 for (i = 0; i < blocksize; i++) {
1447 if (mag[i] > 0.0) {
1448 if (ang[i] > 0.0) {
1449 ang[i] = mag[i] - ang[i];
1450 } else {
1451 float temp = ang[i];
1452 ang[i] = mag[i];
1453 mag[i] += temp;
1454 }
1455 } else {
1456 if (ang[i] > 0.0) {
1457 ang[i] += mag[i];
1458 } else {
1459 float temp = ang[i];
1460 ang[i] = mag[i];
1461 mag[i] -= temp;
1462 }
1463 }
1464 }
1465 }
1466
1467 // Decode the audio packet using the functions above
1468
1469 static int vorbis_parse_audio_packet(vorbis_context *vc)
1470 {
1471 GetBitContext *gb = &vc->gb;
1472 FFTContext *mdct;
1473 unsigned previous_window = vc->previous_window;
1474 unsigned mode_number, blockflag, blocksize;
1475 int i, j;
1476 uint8_t no_residue[255];
1477 uint8_t do_not_decode[255];
1478 vorbis_mapping *mapping;
1479 float *ch_res_ptr = vc->channel_residues;
1480 float *ch_floor_ptr = vc->channel_floors;
1481 uint8_t res_chan[255];
1482 unsigned res_num = 0;
1483 int retlen = 0;
1484
1485 if (get_bits1(gb)) {
1486 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1487 return AVERROR_INVALIDDATA; // packet type not audio
1488 }
1489
1490 if (vc->mode_count == 1) {
1491 mode_number = 0;
1492 } else {
1493 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1494 }
1495 vc->mode_number = mode_number;
1496 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1497
1498 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1499 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1500
1501 blockflag = vc->modes[mode_number].blockflag;
1502 blocksize = vc->blocksize[blockflag];
1503 if (blockflag)
1504 skip_bits(gb, 2); // previous_window, next_window
1505
1506 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1507 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1508
1509 // Decode floor
1510
1511 for (i = 0; i < vc->audio_channels; ++i) {
1512 vorbis_floor *floor;
1513 int ret;
1514 if (mapping->submaps > 1) {
1515 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1516 } else {
1517 floor = &vc->floors[mapping->submap_floor[0]];
1518 }
1519
1520 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1521
1522 if (ret < 0) {
1523 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1524 return AVERROR_INVALIDDATA;
1525 }
1526 no_residue[i] = ret;
1527 ch_floor_ptr += blocksize / 2;
1528 }
1529
1530 // Nonzero vector propagate
1531
1532 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1533 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1534 no_residue[mapping->magnitude[i]] = 0;
1535 no_residue[mapping->angle[i]] = 0;
1536 }
1537 }
1538
1539 // Decode residue
1540
1541 for (i = 0; i < mapping->submaps; ++i) {
1542 vorbis_residue *residue;
1543 unsigned ch = 0;
1544
1545 for (j = 0; j < vc->audio_channels; ++j) {
1546 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1547 res_chan[j] = res_num;
1548 if (no_residue[j]) {
1549 do_not_decode[ch] = 1;
1550 } else {
1551 do_not_decode[ch] = 0;
1552 }
1553 ++ch;
1554 ++res_num;
1555 }
1556 }
1557 residue = &vc->residues[mapping->submap_residue[i]];
1558 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1559
1560 ch_res_ptr += ch * blocksize / 2;
1561 }
1562
1563 // Inverse coupling
1564
1565 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1566 float *mag, *ang;
1567
1568 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1569 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1570 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1571 }
1572
1573 // Dotproduct, MDCT
1574
1575 mdct = &vc->mdct[blockflag];
1576
1577 for (j = vc->audio_channels-1;j >= 0; j--) {
1578 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1579 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1580 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1581 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1582 }
1583
1584 // Overlap/add, save data for next overlapping FPMATH
1585
1586 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1587 for (j = 0; j < vc->audio_channels; j++) {
1588 unsigned bs0 = vc->blocksize[0];
1589 unsigned bs1 = vc->blocksize[1];
1590 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1591 float *saved = vc->saved + j * bs1 / 4;
1592 float *ret = vc->channel_floors + j * retlen;
1593 float *buf = residue;
1594 const float *win = vc->win[blockflag & previous_window];
1595
1596 if (blockflag == previous_window) {
1597 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1598 } else if (blockflag > previous_window) {
1599 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1600 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1601 } else {
1602 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1603 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1604 }
1605 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1606 }
1607
1608 vc->previous_window = blockflag;
1609 return retlen;
1610 }
1611
1612 // Return the decoded audio packet through the standard api
1613
1614 static int vorbis_decode_frame(AVCodecContext *avccontext,
1615 void *data, int *data_size,
1616 AVPacket *avpkt)
1617 {
1618 const uint8_t *buf = avpkt->data;
1619 int buf_size = avpkt->size;
1620 vorbis_context *vc = avccontext->priv_data;
1621 GetBitContext *gb = &(vc->gb);
1622 const float *channel_ptrs[255];
1623 int i, len, out_size;
1624
1625 av_dlog(NULL, "packet length %d \n", buf_size);
1626
1627 init_get_bits(gb, buf, buf_size*8);
1628
1629 if ((len = vorbis_parse_audio_packet(vc)) <= 0)
1630 return len;
1631
1632 if (!vc->first_frame) {
1633 vc->first_frame = 1;
1634 *data_size = 0;
1635 return buf_size;
1636 }
1637
1638 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1639 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1640
1641 out_size = len * vc->audio_channels *
1642 av_get_bytes_per_sample(avccontext->sample_fmt);
1643 if (*data_size < out_size) {
1644 av_log(avccontext, AV_LOG_ERROR, "output buffer is too small\n");
1645 return AVERROR(EINVAL);
1646 }
1647
1648 if (vc->audio_channels > 8) {
1649 for (i = 0; i < vc->audio_channels; i++)
1650 channel_ptrs[i] = vc->channel_floors + i * len;
1651 } else {
1652 for (i = 0; i < vc->audio_channels; i++)
1653 channel_ptrs[i] = vc->channel_floors +
1654 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1655 }
1656
1657 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
1658 vc->fmt_conv.float_interleave(data, channel_ptrs, len, vc->audio_channels);
1659 else
1660 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1661 vc->audio_channels);
1662
1663 *data_size = out_size;
1664
1665 return buf_size;
1666 }
1667
1668 // Close decoder
1669
1670 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1671 {
1672 vorbis_context *vc = avccontext->priv_data;
1673
1674 vorbis_free(vc);
1675
1676 return 0;
1677 }
1678
1679 AVCodec ff_vorbis_decoder = {
1680 .name = "vorbis",
1681 .type = AVMEDIA_TYPE_AUDIO,
1682 .id = CODEC_ID_VORBIS,
1683 .priv_data_size = sizeof(vorbis_context),
1684 .init = vorbis_decode_init,
1685 .close = vorbis_decode_close,
1686 .decode = vorbis_decode_frame,
1687 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1688 .channel_layouts = ff_vorbis_channel_layouts,
1689 .sample_fmts = (const enum AVSampleFormat[]) {
1690 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE
1691 },
1692 };
1693