4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define ALT_BITSTREAM_READER_LE
37 #include "fmtconvert.h"
44 #define V_MAX_VLCS (1 << 16)
45 #define V_MAX_PARTITIONS (1 << 20)
59 typedef union vorbis_floor_u vorbis_floor_data;
60 typedef struct vorbis_floor0_s vorbis_floor0;
61 typedef struct vorbis_floor1_s vorbis_floor1;
62 struct vorbis_context_s;
64 int (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
73 uint16_t bark_map_size;
76 uint8_t amplitude_bits;
77 uint8_t amplitude_offset;
82 struct vorbis_floor1_s {
84 uint8_t partition_class[32];
85 uint8_t class_dimensions[16];
86 uint8_t class_subclasses[16];
87 uint8_t class_masterbook[16];
88 int16_t subclass_books[16][8];
91 vorbis_floor1_entry *list;
100 unsigned partition_size;
101 uint8_t classifications;
103 int16_t books[64][8];
105 uint16_t ptns_to_read;
111 uint16_t coupling_steps;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
122 uint16_t transformtype;
126 typedef struct vorbis_context_s {
127 AVCodecContext *avccontext;
130 FmtConvertContext fmt_conv;
135 uint8_t audio_channels;
136 uint32_t audio_samplerate;
137 uint32_t bitrate_maximum;
138 uint32_t bitrate_nominal;
139 uint32_t bitrate_minimum;
140 uint32_t blocksize[2];
142 uint16_t codebook_count;
143 vorbis_codebook *codebooks;
145 vorbis_floor *floors;
146 uint8_t residue_count;
147 vorbis_residue *residues;
148 uint8_t mapping_count;
149 vorbis_mapping *mappings;
152 uint8_t mode_number; // mode number for the current packet
153 uint8_t previous_window;
154 float *channel_residues;
155 float *channel_floors;
157 float scale_bias; // for float->int conversion
160 /* Helper functions */
163 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
165 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
166 #define VALIDATE_INDEX(idx, limit) \
168 av_log(vc->avccontext, AV_LOG_ERROR,\
170 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
171 return AVERROR_INVALIDDATA;\
173 #define GET_VALIDATED_INDEX(idx, bits, limit) \
175 idx = get_bits(gb, bits);\
176 VALIDATE_INDEX(idx, limit)\
179 static float vorbisfloat2float(unsigned val)
181 double mant = val & 0x1fffff;
182 long exp = (val & 0x7fe00000L) >> 21;
183 if (val & 0x80000000)
185 return ldexp(mant, exp - 20 - 768);
189 // Free all allocated memory -----------------------------------------
191 static void vorbis_free(vorbis_context *vc)
195 av_freep(&vc->channel_residues);
196 av_freep(&vc->channel_floors);
197 av_freep(&vc->saved);
199 for (i = 0; i < vc->residue_count; i++)
200 av_free(vc->residues[i].classifs);
201 av_freep(&vc->residues);
202 av_freep(&vc->modes);
204 ff_mdct_end(&vc->mdct[0]);
205 ff_mdct_end(&vc->mdct[1]);
207 for (i = 0; i < vc->codebook_count; ++i) {
208 av_free(vc->codebooks[i].codevectors);
209 free_vlc(&vc->codebooks[i].vlc);
211 av_freep(&vc->codebooks);
213 for (i = 0; i < vc->floor_count; ++i) {
214 if (vc->floors[i].floor_type == 0) {
215 av_free(vc->floors[i].data.t0.map[0]);
216 av_free(vc->floors[i].data.t0.map[1]);
217 av_free(vc->floors[i].data.t0.book_list);
218 av_free(vc->floors[i].data.t0.lsp);
220 av_free(vc->floors[i].data.t1.list);
223 av_freep(&vc->floors);
225 for (i = 0; i < vc->mapping_count; ++i) {
226 av_free(vc->mappings[i].magnitude);
227 av_free(vc->mappings[i].angle);
228 av_free(vc->mappings[i].mux);
230 av_freep(&vc->mappings);
233 // Parse setup header -------------------------------------------------
235 // Process codebooks part
237 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
240 uint8_t *tmp_vlc_bits;
241 uint32_t *tmp_vlc_codes;
242 GetBitContext *gb = &vc->gb;
243 uint16_t *codebook_multiplicands;
246 vc->codebook_count = get_bits(gb, 8) + 1;
248 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
250 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
251 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
252 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
253 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
255 for (cb = 0; cb < vc->codebook_count; ++cb) {
256 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
257 unsigned ordered, t, entries, used_entries = 0;
259 av_dlog(NULL, " %u. Codebook\n", cb);
261 if (get_bits(gb, 24) != 0x564342) {
262 av_log(vc->avccontext, AV_LOG_ERROR,
263 " %u. Codebook setup data corrupt.\n", cb);
264 ret = AVERROR_INVALIDDATA;
268 codebook_setup->dimensions=get_bits(gb, 16);
269 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
270 av_log(vc->avccontext, AV_LOG_ERROR,
271 " %u. Codebook's dimension is invalid (%d).\n",
272 cb, codebook_setup->dimensions);
273 ret = AVERROR_INVALIDDATA;
276 entries = get_bits(gb, 24);
277 if (entries > V_MAX_VLCS) {
278 av_log(vc->avccontext, AV_LOG_ERROR,
279 " %u. Codebook has too many entries (%u).\n",
281 ret = AVERROR_INVALIDDATA;
285 ordered = get_bits1(gb);
287 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
288 codebook_setup->dimensions, entries);
292 unsigned sparse = get_bits1(gb);
294 av_dlog(NULL, " not ordered \n");
297 av_dlog(NULL, " sparse \n");
300 for (ce = 0; ce < entries; ++ce) {
301 flag = get_bits1(gb);
303 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
306 tmp_vlc_bits[ce] = 0;
309 av_dlog(NULL, " not sparse \n");
311 used_entries = entries;
312 for (ce = 0; ce < entries; ++ce)
313 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
316 unsigned current_entry = 0;
317 unsigned current_length = get_bits(gb, 5) + 1;
319 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
321 used_entries = entries;
322 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
325 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
327 number = get_bits(gb, ilog(entries - current_entry));
329 av_dlog(NULL, " number: %u\n", number);
331 for (i = current_entry; i < number+current_entry; ++i)
332 if (i < used_entries)
333 tmp_vlc_bits[i] = current_length;
335 current_entry+=number;
337 if (current_entry>used_entries) {
338 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
339 ret = AVERROR_INVALIDDATA;
344 codebook_setup->lookup_type = get_bits(gb, 4);
346 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
347 codebook_setup->lookup_type ? "vq" : "no lookup");
349 // If the codebook is used for (inverse) VQ, calculate codevectors.
351 if (codebook_setup->lookup_type == 1) {
353 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
355 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
356 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
357 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
358 unsigned codebook_sequence_p = get_bits1(gb);
360 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
361 codebook_lookup_values);
362 av_dlog(NULL, " delta %f minmum %f \n",
363 codebook_delta_value, codebook_minimum_value);
365 for (i = 0; i < codebook_lookup_values; ++i) {
366 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
368 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
369 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
370 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
373 // Weed out unused vlcs and build codevector vector
374 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
375 codebook_setup->dimensions *
376 sizeof(*codebook_setup->codevectors))
378 for (j = 0, i = 0; i < entries; ++i) {
379 unsigned dim = codebook_setup->dimensions;
381 if (tmp_vlc_bits[i]) {
383 unsigned lookup_offset = i;
385 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
387 for (k = 0; k < dim; ++k) {
388 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
389 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
390 if (codebook_sequence_p)
391 last = codebook_setup->codevectors[j * dim + k];
392 lookup_offset/=codebook_lookup_values;
394 tmp_vlc_bits[j] = tmp_vlc_bits[i];
396 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
397 for (k = 0; k < dim; ++k)
398 av_dlog(vc->avccontext, " %f ",
399 codebook_setup->codevectors[j * dim + k]);
400 av_dlog(vc->avccontext, "\n");
405 if (j != used_entries) {
406 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
407 ret = AVERROR_INVALIDDATA;
410 entries = used_entries;
411 } else if (codebook_setup->lookup_type >= 2) {
412 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
413 ret = AVERROR_INVALIDDATA;
417 // Initialize VLC table
418 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
419 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
420 ret = AVERROR_INVALIDDATA;
423 codebook_setup->maxdepth = 0;
424 for (t = 0; t < entries; ++t)
425 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
426 codebook_setup->maxdepth = tmp_vlc_bits[t];
428 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
429 codebook_setup->nb_bits = V_NB_BITS2;
431 codebook_setup->nb_bits = V_NB_BITS;
433 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
435 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
436 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
437 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
438 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
440 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
445 av_free(tmp_vlc_bits);
446 av_free(tmp_vlc_codes);
447 av_free(codebook_multiplicands);
452 av_free(tmp_vlc_bits);
453 av_free(tmp_vlc_codes);
454 av_free(codebook_multiplicands);
458 // Process time domain transforms part (unused in Vorbis I)
460 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
462 GetBitContext *gb = &vc->gb;
463 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
465 for (i = 0; i < vorbis_time_count; ++i) {
466 unsigned vorbis_tdtransform = get_bits(gb, 16);
468 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
469 vorbis_time_count, vorbis_tdtransform);
471 if (vorbis_tdtransform) {
472 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
473 return AVERROR_INVALIDDATA;
479 // Process floors part
481 static int vorbis_floor0_decode(vorbis_context *vc,
482 vorbis_floor_data *vfu, float *vec);
483 static void create_map(vorbis_context *vc, unsigned floor_number);
484 static int vorbis_floor1_decode(vorbis_context *vc,
485 vorbis_floor_data *vfu, float *vec);
486 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
488 GetBitContext *gb = &vc->gb;
491 vc->floor_count = get_bits(gb, 6) + 1;
493 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
495 for (i = 0; i < vc->floor_count; ++i) {
496 vorbis_floor *floor_setup = &vc->floors[i];
498 floor_setup->floor_type = get_bits(gb, 16);
500 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
502 if (floor_setup->floor_type == 1) {
503 int maximum_class = -1;
504 unsigned rangebits, rangemax, floor1_values = 2;
506 floor_setup->decode = vorbis_floor1_decode;
508 floor_setup->data.t1.partitions = get_bits(gb, 5);
510 av_dlog(NULL, " %d.floor: %d partitions \n",
511 i, floor_setup->data.t1.partitions);
513 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
514 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
515 if (floor_setup->data.t1.partition_class[j] > maximum_class)
516 maximum_class = floor_setup->data.t1.partition_class[j];
518 av_dlog(NULL, " %d. floor %d partition class %d \n",
519 i, j, floor_setup->data.t1.partition_class[j]);
523 av_dlog(NULL, " maximum class %d \n", maximum_class);
525 for (j = 0; j <= maximum_class; ++j) {
526 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
527 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
529 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
530 floor_setup->data.t1.class_dimensions[j],
531 floor_setup->data.t1.class_subclasses[j]);
533 if (floor_setup->data.t1.class_subclasses[j]) {
534 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
536 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
539 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
540 int16_t bits = get_bits(gb, 8) - 1;
542 VALIDATE_INDEX(bits, vc->codebook_count)
543 floor_setup->data.t1.subclass_books[j][k] = bits;
545 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
549 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
550 floor_setup->data.t1.x_list_dim = 2;
552 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
553 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
555 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
556 sizeof(*floor_setup->data.t1.list));
559 rangebits = get_bits(gb, 4);
560 rangemax = (1 << rangebits);
561 if (rangemax > vc->blocksize[1] / 2) {
562 av_log(vc->avccontext, AV_LOG_ERROR,
563 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
564 rangemax, vc->blocksize[1] / 2);
565 return AVERROR_INVALIDDATA;
567 floor_setup->data.t1.list[0].x = 0;
568 floor_setup->data.t1.list[1].x = rangemax;
570 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
571 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
572 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
574 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
575 floor_setup->data.t1.list[floor1_values].x);
579 // Precalculate order of x coordinates - needed for decode
580 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
581 } else if (floor_setup->floor_type == 0) {
582 unsigned max_codebook_dim = 0;
584 floor_setup->decode = vorbis_floor0_decode;
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 *
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;
597 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
598 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
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 */
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;
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);
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);
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]);
648 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
649 return AVERROR_INVALIDDATA;
655 // Process residues part
657 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
659 GetBitContext *gb = &vc->gb;
662 vc->residue_count = get_bits(gb, 6)+1;
663 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
665 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
667 for (i = 0; i < vc->residue_count; ++i) {
668 vorbis_residue *res_setup = &vc->residues[i];
670 unsigned high_bits, low_bits;
672 res_setup->type = get_bits(gb, 16);
674 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
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 > vc->avccontext->channels * 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;
690 res_setup->classifications = get_bits(gb, 6) + 1;
691 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
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 *
697 sizeof(*res_setup->classifs));
698 if (!res_setup->classifs)
699 return AVERROR(ENOMEM);
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);
705 for (j = 0; j < res_setup->classifications; ++j) {
707 low_bits = get_bits(gb, 3);
709 high_bits = get_bits(gb, 5);
710 cascade[j] = (high_bits << 3) + low_bits;
712 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
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)
721 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
722 j, k, res_setup->books[j][k]);
724 if (k>res_setup->maxpass)
725 res_setup->maxpass = k;
727 res_setup->books[j][k] = -1;
735 // Process mappings part
737 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
739 GetBitContext *gb = &vc->gb;
742 vc->mapping_count = get_bits(gb, 6)+1;
743 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
745 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
747 for (i = 0; i < vc->mapping_count; ++i) {
748 vorbis_mapping *mapping_setup = &vc->mappings[i];
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;
755 mapping_setup->submaps = get_bits(gb, 4) + 1;
757 mapping_setup->submaps = 1;
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)
771 mapping_setup->coupling_steps = 0;
774 av_dlog(NULL, " %u mapping coupling steps: %d\n",
775 i, mapping_setup->coupling_steps);
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.
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);
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)
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]);
802 // Process modes part
804 static void create_map(vorbis_context *vc, unsigned floor_number)
806 vorbis_floor *floors = vc->floors;
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
817 map = floors[floor_number].data.t0.map[blockflag];
818 vf = &floors[floor_number].data.t0;
820 for (idx = 0; idx < n; ++idx) {
821 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
822 ((vf->bark_map_size) /
823 BARK(vf->rate / 2.0f)));
824 if (vf->bark_map_size-1 < map[idx])
825 map[idx] = vf->bark_map_size - 1;
828 vf->map_size[blockflag] = n;
831 for (idx = 0; idx <= n; ++idx) {
832 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
836 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
838 GetBitContext *gb = &vc->gb;
841 vc->mode_count = get_bits(gb, 6) + 1;
842 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
844 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
846 for (i = 0; i < vc->mode_count; ++i) {
847 vorbis_mode *mode_setup = &vc->modes[i];
849 mode_setup->blockflag = get_bits1(gb);
850 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
851 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
852 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
854 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
855 i, mode_setup->blockflag, mode_setup->windowtype,
856 mode_setup->transformtype, mode_setup->mapping);
861 // Process the whole setup header using the functions above
863 static int vorbis_parse_setup_hdr(vorbis_context *vc)
865 GetBitContext *gb = &vc->gb;
868 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
869 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
870 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
872 return AVERROR_INVALIDDATA;
875 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
876 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
879 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
883 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
887 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
891 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
895 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
899 if (!get_bits1(gb)) {
900 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
901 return AVERROR_INVALIDDATA; // framing flag bit unset error
907 // Process the identification header
909 static int vorbis_parse_id_hdr(vorbis_context *vc)
911 GetBitContext *gb = &vc->gb;
914 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
915 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
916 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
917 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
918 return AVERROR_INVALIDDATA;
921 vc->version = get_bits_long(gb, 32); //FIXME check 0
922 vc->audio_channels = get_bits(gb, 8);
923 if (vc->audio_channels <= 0) {
924 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
925 return AVERROR_INVALIDDATA;
927 vc->audio_samplerate = get_bits_long(gb, 32);
928 if (vc->audio_samplerate <= 0) {
929 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
930 return AVERROR_INVALIDDATA;
932 vc->bitrate_maximum = get_bits_long(gb, 32);
933 vc->bitrate_nominal = get_bits_long(gb, 32);
934 vc->bitrate_minimum = get_bits_long(gb, 32);
935 bl0 = get_bits(gb, 4);
936 bl1 = get_bits(gb, 4);
937 vc->blocksize[0] = (1 << bl0);
938 vc->blocksize[1] = (1 << bl1);
939 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
940 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
941 return AVERROR_INVALIDDATA;
943 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
944 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
946 if ((get_bits1(gb)) == 0) {
947 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
948 return AVERROR_INVALIDDATA;
951 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
952 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
953 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
954 vc->previous_window = 0;
956 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
957 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
959 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 ",
960 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
963 BLK = vc->blocksize[0];
964 for (i = 0; i < BLK / 2; ++i) {
965 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)));
972 // Process the extradata using the functions above (identification header, setup header)
974 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
976 vorbis_context *vc = avccontext->priv_data;
977 uint8_t *headers = avccontext->extradata;
978 int headers_len = avccontext->extradata_size;
979 uint8_t *header_start[3];
981 GetBitContext *gb = &(vc->gb);
984 vc->avccontext = avccontext;
985 dsputil_init(&vc->dsp, avccontext);
986 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
988 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
989 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
990 vc->scale_bias = 1.0f;
992 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
993 vc->scale_bias = 32768.0f;
997 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
998 return AVERROR_INVALIDDATA;
1001 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1002 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1006 init_get_bits(gb, header_start[0], header_len[0]*8);
1007 hdr_type = get_bits(gb, 8);
1008 if (hdr_type != 1) {
1009 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1010 return AVERROR_INVALIDDATA;
1012 if ((ret = vorbis_parse_id_hdr(vc))) {
1013 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1018 init_get_bits(gb, header_start[2], header_len[2]*8);
1019 hdr_type = get_bits(gb, 8);
1020 if (hdr_type != 5) {
1021 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1023 return AVERROR_INVALIDDATA;
1025 if ((ret = vorbis_parse_setup_hdr(vc))) {
1026 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1031 if (vc->audio_channels > 8)
1032 avccontext->channel_layout = 0;
1034 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1036 avccontext->channels = vc->audio_channels;
1037 avccontext->sample_rate = vc->audio_samplerate;
1038 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1043 // Decode audiopackets -------------------------------------------------
1045 // Read and decode floor
1047 static int vorbis_floor0_decode(vorbis_context *vc,
1048 vorbis_floor_data *vfu, float *vec)
1050 vorbis_floor0 *vf = &vfu->t0;
1051 float *lsp = vf->lsp;
1052 unsigned amplitude, book_idx;
1053 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1055 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1056 if (amplitude > 0) {
1058 unsigned idx, lsp_len = 0;
1059 vorbis_codebook codebook;
1061 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1062 if (book_idx >= vf->num_books) {
1063 av_log(vc->avccontext, AV_LOG_ERROR,
1064 "floor0 dec: booknumber too high!\n");
1067 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1068 codebook = vc->codebooks[vf->book_list[book_idx]];
1069 /* Invalid codebook! */
1070 if (!codebook.codevectors)
1071 return AVERROR_INVALIDDATA;
1073 while (lsp_len<vf->order) {
1076 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1077 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1078 /* read temp vector */
1079 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1080 codebook.nb_bits, codebook.maxdepth)
1081 * codebook.dimensions;
1082 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1083 /* copy each vector component and add last to it */
1084 for (idx = 0; idx < codebook.dimensions; ++idx)
1085 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1086 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1088 lsp_len += codebook.dimensions;
1090 /* DEBUG: output lsp coeffs */
1093 for (idx = 0; idx < lsp_len; ++idx)
1094 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1097 /* synthesize floor output vector */
1100 int order = vf->order;
1101 float wstep = M_PI / vf->bark_map_size;
1103 for (i = 0; i < order; i++)
1104 lsp[i] = 2.0f * cos(lsp[i]);
1106 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1107 vf->map_size[blockflag], order, wstep);
1110 while (i < vf->map_size[blockflag]) {
1111 int j, iter_cond = vf->map[blockflag][i];
1114 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1116 /* similar part for the q and p products */
1117 for (j = 0; j + 1 < order; j += 2) {
1118 q *= lsp[j] - two_cos_w;
1119 p *= lsp[j + 1] - two_cos_w;
1121 if (j == order) { // even order
1122 p *= p * (2.0f - two_cos_w);
1123 q *= q * (2.0f + two_cos_w);
1124 } else { // odd order
1125 q *= two_cos_w-lsp[j]; // one more time for q
1127 /* final step and square */
1128 p *= p * (4.f - two_cos_w * two_cos_w);
1132 /* calculate linear floor value */
1133 q = exp((((amplitude*vf->amplitude_offset) /
1134 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1135 - vf->amplitude_offset) * .11512925f);
1140 } while (vf->map[blockflag][i] == iter_cond);
1144 /* this channel is unused */
1148 av_dlog(NULL, " Floor0 decoded\n");
1153 static int vorbis_floor1_decode(vorbis_context *vc,
1154 vorbis_floor_data *vfu, float *vec)
1156 vorbis_floor1 *vf = &vfu->t1;
1157 GetBitContext *gb = &vc->gb;
1158 uint16_t range_v[4] = { 256, 128, 86, 64 };
1159 unsigned range = range_v[vf->multiplier - 1];
1160 uint16_t floor1_Y[258];
1161 uint16_t floor1_Y_final[258];
1162 int floor1_flag[258];
1163 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1164 int book, adx, ady, dy, off, predicted, err;
1167 if (!get_bits1(gb)) // silence
1170 // Read values (or differences) for the floor's points
1172 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1173 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1175 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1178 for (i = 0; i < vf->partitions; ++i) {
1179 partition_class = vf->partition_class[i];
1180 cdim = vf->class_dimensions[partition_class];
1181 cbits = vf->class_subclasses[partition_class];
1182 csub = (1 << cbits) - 1;
1185 av_dlog(NULL, "Cbits %u\n", cbits);
1187 if (cbits) // this reads all subclasses for this partition's class
1188 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1189 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1191 for (j = 0; j < cdim; ++j) {
1192 book = vf->subclass_books[partition_class][cval & csub];
1194 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1195 book, cbits, cval, get_bits_count(gb));
1197 cval = cval >> cbits;
1199 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1200 vc->codebooks[book].nb_bits, 3);
1202 floor1_Y[offset+j] = 0;
1205 av_dlog(NULL, " floor(%d) = %d \n",
1206 vf->list[offset+j].x, floor1_Y[offset+j]);
1211 // Amplitude calculation from the differences
1215 floor1_Y_final[0] = floor1_Y[0];
1216 floor1_Y_final[1] = floor1_Y[1];
1218 for (i = 2; i < vf->x_list_dim; ++i) {
1219 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1221 low_neigh_offs = vf->list[i].low;
1222 high_neigh_offs = vf->list[i].high;
1223 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1224 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1226 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1229 predicted = floor1_Y_final[low_neigh_offs] - off;
1231 predicted = floor1_Y_final[low_neigh_offs] + off;
1232 } // render_point end
1235 highroom = range-predicted;
1236 lowroom = predicted;
1237 if (highroom < lowroom) {
1238 room = highroom * 2;
1240 room = lowroom * 2; // SPEC mispelling
1243 floor1_flag[low_neigh_offs] = 1;
1244 floor1_flag[high_neigh_offs] = 1;
1247 if (highroom > lowroom) {
1248 floor1_Y_final[i] = val - lowroom + predicted;
1250 floor1_Y_final[i] = predicted - val + highroom - 1;
1254 floor1_Y_final[i] = predicted - (val + 1) / 2;
1256 floor1_Y_final[i] = predicted + val / 2;
1261 floor1_Y_final[i] = predicted;
1264 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1265 vf->list[i].x, floor1_Y_final[i], val);
1268 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1270 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1272 av_dlog(NULL, " Floor decoded\n");
1277 // Read and decode residue
1279 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1282 uint8_t *do_not_decode,
1287 GetBitContext *gb = &vc->gb;
1288 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1289 unsigned ptns_to_read = vr->ptns_to_read;
1290 uint8_t *classifs = vr->classifs;
1291 unsigned pass, ch_used, i, j, k, l;
1294 for (j = 1; j < ch; ++j)
1295 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1296 if (do_not_decode[0])
1303 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1305 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1306 uint16_t voffset, partition_count, j_times_ptns_to_read;
1308 voffset = vr->begin;
1309 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1311 unsigned inverse_class = ff_inverse[vr->classifications];
1312 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1313 if (!do_not_decode[j]) {
1314 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1315 vc->codebooks[vr->classbook].nb_bits, 3);
1317 av_dlog(NULL, "Classword: %u\n", temp);
1319 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1320 for (i = 0; i < c_p_c; ++i) {
1323 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1324 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1325 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1329 j_times_ptns_to_read += ptns_to_read;
1332 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1333 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1336 if (!do_not_decode[j]) {
1337 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1338 int vqbook = vr->books[vqclass][pass];
1340 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1342 unsigned dim = vc->codebooks[vqbook].dimensions;
1343 unsigned step = dim == 1 ? vr->partition_size
1344 : FASTDIV(vr->partition_size, dim);
1345 vorbis_codebook codebook = vc->codebooks[vqbook];
1349 voffs = voffset+j*vlen;
1350 for (k = 0; k < step; ++k) {
1351 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1352 for (l = 0; l < dim; ++l)
1353 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1355 } else if (vr_type == 1) {
1356 voffs = voffset + j * vlen;
1357 for (k = 0; k < step; ++k) {
1358 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1359 for (l = 0; l < dim; ++l, ++voffs) {
1360 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1362 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1363 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1366 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1367 voffs = voffset >> 1;
1370 for (k = 0; k < step; ++k) {
1371 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1372 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1373 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1375 } else if (dim == 4) {
1376 for (k = 0; k < step; ++k, voffs += 2) {
1377 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1378 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1379 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1380 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1381 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1384 for (k = 0; k < step; ++k) {
1385 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1386 for (l = 0; l < dim; l += 2, voffs++) {
1387 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1388 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1390 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1391 pass, voffset / ch + (voffs % ch) * vlen,
1392 vec[voffset / ch + (voffs % ch) * vlen],
1393 codebook.codevectors[coffs + l], coffs, l);
1397 } else if (vr_type == 2) {
1400 for (k = 0; k < step; ++k) {
1401 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1402 for (l = 0; l < dim; ++l, ++voffs) {
1403 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1405 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1406 pass, voffset / ch + (voffs % ch) * vlen,
1407 vec[voffset / ch + (voffs % ch) * vlen],
1408 codebook.codevectors[coffs + l], coffs, l);
1414 j_times_ptns_to_read += ptns_to_read;
1417 voffset += vr->partition_size;
1424 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1426 uint8_t *do_not_decode,
1427 float *vec, unsigned vlen)
1430 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1431 else if (vr->type == 1)
1432 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1433 else if (vr->type == 0)
1434 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1436 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1437 return AVERROR_INVALIDDATA;
1441 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1444 for (i = 0; i < blocksize; i++) {
1447 ang[i] = mag[i] - ang[i];
1449 float temp = ang[i];
1457 float temp = ang[i];
1465 // Decode the audio packet using the functions above
1467 static int vorbis_parse_audio_packet(vorbis_context *vc)
1469 GetBitContext *gb = &vc->gb;
1471 unsigned previous_window = vc->previous_window;
1472 unsigned mode_number, blockflag, blocksize;
1474 uint8_t no_residue[255];
1475 uint8_t do_not_decode[255];
1476 vorbis_mapping *mapping;
1477 float *ch_res_ptr = vc->channel_residues;
1478 float *ch_floor_ptr = vc->channel_floors;
1479 uint8_t res_chan[255];
1480 unsigned res_num = 0;
1483 if (get_bits1(gb)) {
1484 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1485 return AVERROR_INVALIDDATA; // packet type not audio
1488 if (vc->mode_count == 1) {
1491 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1493 vc->mode_number = mode_number;
1494 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1496 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1497 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1499 blockflag = vc->modes[mode_number].blockflag;
1500 blocksize = vc->blocksize[blockflag];
1502 skip_bits(gb, 2); // previous_window, next_window
1504 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1505 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1509 for (i = 0; i < vc->audio_channels; ++i) {
1510 vorbis_floor *floor;
1512 if (mapping->submaps > 1) {
1513 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1515 floor = &vc->floors[mapping->submap_floor[0]];
1518 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1521 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1522 return AVERROR_INVALIDDATA;
1524 no_residue[i] = ret;
1525 ch_floor_ptr += blocksize / 2;
1528 // Nonzero vector propagate
1530 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1531 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1532 no_residue[mapping->magnitude[i]] = 0;
1533 no_residue[mapping->angle[i]] = 0;
1539 for (i = 0; i < mapping->submaps; ++i) {
1540 vorbis_residue *residue;
1543 for (j = 0; j < vc->audio_channels; ++j) {
1544 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1545 res_chan[j] = res_num;
1546 if (no_residue[j]) {
1547 do_not_decode[ch] = 1;
1549 do_not_decode[ch] = 0;
1555 residue = &vc->residues[mapping->submap_residue[i]];
1556 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1558 ch_res_ptr += ch * blocksize / 2;
1563 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1566 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1567 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1568 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1573 mdct = &vc->mdct[blockflag];
1575 for (j = vc->audio_channels-1;j >= 0; j--) {
1576 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1577 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1578 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1579 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1582 // Overlap/add, save data for next overlapping FPMATH
1584 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1585 for (j = 0; j < vc->audio_channels; j++) {
1586 unsigned bs0 = vc->blocksize[0];
1587 unsigned bs1 = vc->blocksize[1];
1588 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1589 float *saved = vc->saved + j * bs1 / 4;
1590 float *ret = vc->channel_floors + j * retlen;
1591 float *buf = residue;
1592 const float *win = vc->win[blockflag & previous_window];
1594 if (blockflag == previous_window) {
1595 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1596 } else if (blockflag > previous_window) {
1597 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1598 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1600 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1601 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1603 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1606 vc->previous_window = blockflag;
1610 // Return the decoded audio packet through the standard api
1612 static int vorbis_decode_frame(AVCodecContext *avccontext,
1613 void *data, int *data_size,
1616 const uint8_t *buf = avpkt->data;
1617 int buf_size = avpkt->size;
1618 vorbis_context *vc = avccontext->priv_data;
1619 GetBitContext *gb = &(vc->gb);
1620 const float *channel_ptrs[255];
1621 int i, len, out_size;
1623 av_dlog(NULL, "packet length %d \n", buf_size);
1625 init_get_bits(gb, buf, buf_size*8);
1627 if ((len = vorbis_parse_audio_packet(vc)) <= 0)
1630 if (!vc->first_frame) {
1631 vc->first_frame = 1;
1636 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1637 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1639 out_size = len * vc->audio_channels *
1640 av_get_bytes_per_sample(avccontext->sample_fmt);
1641 if (*data_size < out_size) {
1642 av_log(avccontext, AV_LOG_ERROR, "output buffer is too small\n");
1643 return AVERROR(EINVAL);
1646 if (vc->audio_channels > 8) {
1647 for (i = 0; i < vc->audio_channels; i++)
1648 channel_ptrs[i] = vc->channel_floors + i * len;
1650 for (i = 0; i < vc->audio_channels; i++)
1651 channel_ptrs[i] = vc->channel_floors +
1652 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1655 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
1656 vc->fmt_conv.float_interleave(data, channel_ptrs, len, vc->audio_channels);
1658 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1659 vc->audio_channels);
1661 *data_size = out_size;
1668 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1670 vorbis_context *vc = avccontext->priv_data;
1677 AVCodec ff_vorbis_decoder = {
1679 .type = AVMEDIA_TYPE_AUDIO,
1680 .id = CODEC_ID_VORBIS,
1681 .priv_data_size = sizeof(vorbis_context),
1682 .init = vorbis_decode_init,
1683 .close = vorbis_decode_close,
1684 .decode = vorbis_decode_frame,
1685 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1686 .channel_layouts = ff_vorbis_channel_layouts,
1687 .sample_fmts = (const enum AVSampleFormat[]) {
1688 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE