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 #define ALT_BITSTREAM_READER_LE
31 #include "fmtconvert.h"
38 #define V_MAX_VLCS (1 << 16)
39 #define V_MAX_PARTITIONS (1 << 20)
53 typedef union vorbis_floor_u vorbis_floor_data;
54 typedef struct vorbis_floor0_s vorbis_floor0;
55 typedef struct vorbis_floor1_s vorbis_floor1;
56 struct vorbis_context_s;
58 int (* vorbis_floor_decode_func)
59 (struct vorbis_context_s *, vorbis_floor_data *, float *);
62 vorbis_floor_decode_func decode;
63 union vorbis_floor_u {
64 struct vorbis_floor0_s {
67 uint16_t bark_map_size;
70 uint8_t amplitude_bits;
71 uint8_t amplitude_offset;
76 struct vorbis_floor1_s {
78 uint8_t partition_class[32];
79 uint8_t class_dimensions[16];
80 uint8_t class_subclasses[16];
81 uint8_t class_masterbook[16];
82 int16_t subclass_books[16][8];
85 vorbis_floor1_entry *list;
94 unsigned partition_size;
95 uint8_t classifications;
99 uint16_t ptns_to_read;
105 uint16_t coupling_steps;
109 uint8_t submap_floor[16];
110 uint8_t submap_residue[16];
116 uint16_t transformtype;
120 typedef struct vorbis_context_s {
121 AVCodecContext *avccontext;
124 FmtConvertContext fmt_conv;
129 uint8_t audio_channels;
130 uint32_t audio_samplerate;
131 uint32_t bitrate_maximum;
132 uint32_t bitrate_nominal;
133 uint32_t bitrate_minimum;
134 uint32_t blocksize[2];
136 uint16_t codebook_count;
137 vorbis_codebook *codebooks;
139 vorbis_floor *floors;
140 uint8_t residue_count;
141 vorbis_residue *residues;
142 uint8_t mapping_count;
143 vorbis_mapping *mappings;
146 uint8_t mode_number; // mode number for the current packet
147 uint8_t previous_window;
148 float *channel_residues;
149 float *channel_floors;
151 float scale_bias; // for float->int conversion
154 /* Helper functions */
157 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
159 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
160 #define VALIDATE_INDEX(idx, limit) \
162 av_log(vc->avccontext, AV_LOG_ERROR,\
164 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
167 #define GET_VALIDATED_INDEX(idx, bits, limit) \
169 idx = get_bits(gb, bits);\
170 VALIDATE_INDEX(idx, limit)\
173 static float vorbisfloat2float(unsigned val)
175 double mant = val & 0x1fffff;
176 long exp = (val & 0x7fe00000L) >> 21;
177 if (val & 0x80000000)
179 return ldexp(mant, exp - 20 - 768);
183 // Free all allocated memory -----------------------------------------
185 static void vorbis_free(vorbis_context *vc)
189 av_freep(&vc->channel_residues);
190 av_freep(&vc->channel_floors);
191 av_freep(&vc->saved);
193 for (i = 0; i < vc->residue_count; i++)
194 av_free(vc->residues[i].classifs);
195 av_freep(&vc->residues);
196 av_freep(&vc->modes);
198 ff_mdct_end(&vc->mdct[0]);
199 ff_mdct_end(&vc->mdct[1]);
201 for (i = 0; i < vc->codebook_count; ++i) {
202 av_free(vc->codebooks[i].codevectors);
203 free_vlc(&vc->codebooks[i].vlc);
205 av_freep(&vc->codebooks);
207 for (i = 0; i < vc->floor_count; ++i) {
208 if (vc->floors[i].floor_type == 0) {
209 av_free(vc->floors[i].data.t0.map[0]);
210 av_free(vc->floors[i].data.t0.map[1]);
211 av_free(vc->floors[i].data.t0.book_list);
212 av_free(vc->floors[i].data.t0.lsp);
214 av_free(vc->floors[i].data.t1.list);
217 av_freep(&vc->floors);
219 for (i = 0; i < vc->mapping_count; ++i) {
220 av_free(vc->mappings[i].magnitude);
221 av_free(vc->mappings[i].angle);
222 av_free(vc->mappings[i].mux);
224 av_freep(&vc->mappings);
227 // Parse setup header -------------------------------------------------
229 // Process codebooks part
231 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
234 uint8_t *tmp_vlc_bits;
235 uint32_t *tmp_vlc_codes;
236 GetBitContext *gb = &vc->gb;
237 uint16_t *codebook_multiplicands;
239 vc->codebook_count = get_bits(gb, 8) + 1;
241 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
243 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
244 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
245 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
246 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
248 for (cb = 0; cb < vc->codebook_count; ++cb) {
249 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
250 unsigned ordered, t, entries, used_entries = 0;
252 av_dlog(NULL, " %u. Codebook\n", cb);
254 if (get_bits(gb, 24) != 0x564342) {
255 av_log(vc->avccontext, AV_LOG_ERROR,
256 " %u. Codebook setup data corrupt.\n", cb);
260 codebook_setup->dimensions=get_bits(gb, 16);
261 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
262 av_log(vc->avccontext, AV_LOG_ERROR,
263 " %u. Codebook's dimension is invalid (%d).\n",
264 cb, codebook_setup->dimensions);
267 entries = get_bits(gb, 24);
268 if (entries > V_MAX_VLCS) {
269 av_log(vc->avccontext, AV_LOG_ERROR,
270 " %u. Codebook has too many entries (%u).\n",
275 ordered = get_bits1(gb);
277 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
278 codebook_setup->dimensions, entries);
282 unsigned sparse = get_bits1(gb);
284 av_dlog(NULL, " not ordered \n");
287 av_dlog(NULL, " sparse \n");
290 for (ce = 0; ce < entries; ++ce) {
291 flag = get_bits1(gb);
293 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
296 tmp_vlc_bits[ce] = 0;
299 av_dlog(NULL, " not sparse \n");
301 used_entries = entries;
302 for (ce = 0; ce < entries; ++ce)
303 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
306 unsigned current_entry = 0;
307 unsigned current_length = get_bits(gb, 5) + 1;
309 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
311 used_entries = entries;
312 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
315 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
317 number = get_bits(gb, ilog(entries - current_entry));
319 av_dlog(NULL, " number: %u\n", number);
321 for (i = current_entry; i < number+current_entry; ++i)
322 if (i < used_entries)
323 tmp_vlc_bits[i] = current_length;
325 current_entry+=number;
327 if (current_entry>used_entries) {
328 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
333 codebook_setup->lookup_type = get_bits(gb, 4);
335 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
336 codebook_setup->lookup_type ? "vq" : "no lookup");
338 // If the codebook is used for (inverse) VQ, calculate codevectors.
340 if (codebook_setup->lookup_type == 1) {
342 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
344 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
345 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
346 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
347 unsigned codebook_sequence_p = get_bits1(gb);
349 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
350 codebook_lookup_values);
351 av_dlog(NULL, " delta %f minmum %f \n",
352 codebook_delta_value, codebook_minimum_value);
354 for (i = 0; i < codebook_lookup_values; ++i) {
355 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
357 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
358 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
359 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
362 // Weed out unused vlcs and build codevector vector
363 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
364 codebook_setup->dimensions *
365 sizeof(*codebook_setup->codevectors))
367 for (j = 0, i = 0; i < entries; ++i) {
368 unsigned dim = codebook_setup->dimensions;
370 if (tmp_vlc_bits[i]) {
372 unsigned lookup_offset = i;
374 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
376 for (k = 0; k < dim; ++k) {
377 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
378 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
379 if (codebook_sequence_p)
380 last = codebook_setup->codevectors[j * dim + k];
381 lookup_offset/=codebook_lookup_values;
383 tmp_vlc_bits[j] = tmp_vlc_bits[i];
385 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
386 for (k = 0; k < dim; ++k)
387 av_dlog(vc->avccontext, " %f ",
388 codebook_setup->codevectors[j * dim + k]);
389 av_dlog(vc->avccontext, "\n");
394 if (j != used_entries) {
395 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
398 entries = used_entries;
399 } else if (codebook_setup->lookup_type >= 2) {
400 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
404 // Initialize VLC table
405 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
406 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
409 codebook_setup->maxdepth = 0;
410 for (t = 0; t < entries; ++t)
411 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
412 codebook_setup->maxdepth = tmp_vlc_bits[t];
414 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
415 codebook_setup->nb_bits = V_NB_BITS2;
417 codebook_setup->nb_bits = V_NB_BITS;
419 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
421 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
422 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
427 av_free(tmp_vlc_bits);
428 av_free(tmp_vlc_codes);
429 av_free(codebook_multiplicands);
434 av_free(tmp_vlc_bits);
435 av_free(tmp_vlc_codes);
436 av_free(codebook_multiplicands);
440 // Process time domain transforms part (unused in Vorbis I)
442 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
444 GetBitContext *gb = &vc->gb;
445 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
447 for (i = 0; i < vorbis_time_count; ++i) {
448 unsigned vorbis_tdtransform = get_bits(gb, 16);
450 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
451 vorbis_time_count, vorbis_tdtransform);
453 if (vorbis_tdtransform) {
454 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
461 // Process floors part
463 static int vorbis_floor0_decode(vorbis_context *vc,
464 vorbis_floor_data *vfu, float *vec);
465 static void create_map(vorbis_context *vc, unsigned floor_number);
466 static int vorbis_floor1_decode(vorbis_context *vc,
467 vorbis_floor_data *vfu, float *vec);
468 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
470 GetBitContext *gb = &vc->gb;
473 vc->floor_count = get_bits(gb, 6) + 1;
475 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
477 for (i = 0; i < vc->floor_count; ++i) {
478 vorbis_floor *floor_setup = &vc->floors[i];
480 floor_setup->floor_type = get_bits(gb, 16);
482 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
484 if (floor_setup->floor_type == 1) {
485 int maximum_class = -1;
486 unsigned rangebits, rangemax, floor1_values = 2;
488 floor_setup->decode = vorbis_floor1_decode;
490 floor_setup->data.t1.partitions = get_bits(gb, 5);
492 av_dlog(NULL, " %d.floor: %d partitions \n",
493 i, floor_setup->data.t1.partitions);
495 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
496 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
497 if (floor_setup->data.t1.partition_class[j] > maximum_class)
498 maximum_class = floor_setup->data.t1.partition_class[j];
500 av_dlog(NULL, " %d. floor %d partition class %d \n",
501 i, j, floor_setup->data.t1.partition_class[j]);
505 av_dlog(NULL, " maximum class %d \n", maximum_class);
507 for (j = 0; j <= maximum_class; ++j) {
508 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
509 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
511 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
512 floor_setup->data.t1.class_dimensions[j],
513 floor_setup->data.t1.class_subclasses[j]);
515 if (floor_setup->data.t1.class_subclasses[j]) {
516 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
518 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
521 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
522 int16_t bits = get_bits(gb, 8) - 1;
524 VALIDATE_INDEX(bits, vc->codebook_count)
525 floor_setup->data.t1.subclass_books[j][k] = bits;
527 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
531 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
532 floor_setup->data.t1.x_list_dim = 2;
534 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
535 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
537 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
538 sizeof(*floor_setup->data.t1.list));
541 rangebits = get_bits(gb, 4);
542 rangemax = (1 << rangebits);
543 if (rangemax > vc->blocksize[1] / 2) {
544 av_log(vc->avccontext, AV_LOG_ERROR,
545 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
546 rangemax, vc->blocksize[1] / 2);
549 floor_setup->data.t1.list[0].x = 0;
550 floor_setup->data.t1.list[1].x = rangemax;
552 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
553 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
554 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
556 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
557 floor_setup->data.t1.list[floor1_values].x);
561 // Precalculate order of x coordinates - needed for decode
562 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
563 } else if (floor_setup->floor_type == 0) {
564 unsigned max_codebook_dim = 0;
566 floor_setup->decode = vorbis_floor0_decode;
568 floor_setup->data.t0.order = get_bits(gb, 8);
569 floor_setup->data.t0.rate = get_bits(gb, 16);
570 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
571 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
572 /* zero would result in a div by zero later *
574 if (floor_setup->data.t0.amplitude_bits == 0) {
575 av_log(vc->avccontext, AV_LOG_ERROR,
576 "Floor 0 amplitude bits is 0.\n");
579 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
580 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
582 /* allocate mem for booklist */
583 floor_setup->data.t0.book_list =
584 av_malloc(floor_setup->data.t0.num_books);
585 if (!floor_setup->data.t0.book_list)
587 /* read book indexes */
591 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
592 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
593 floor_setup->data.t0.book_list[idx] = book_idx;
594 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
595 max_codebook_dim = vc->codebooks[book_idx].dimensions;
601 /* codebook dim is for padding if codebook dim doesn't *
602 * divide order+1 then we need to read more data */
603 floor_setup->data.t0.lsp =
604 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
605 * sizeof(*floor_setup->data.t0.lsp));
606 if (!floor_setup->data.t0.lsp)
609 /* debug output parsed headers */
610 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
611 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
612 av_dlog(NULL, "floor0 bark map size: %u\n",
613 floor_setup->data.t0.bark_map_size);
614 av_dlog(NULL, "floor0 amplitude bits: %u\n",
615 floor_setup->data.t0.amplitude_bits);
616 av_dlog(NULL, "floor0 amplitude offset: %u\n",
617 floor_setup->data.t0.amplitude_offset);
618 av_dlog(NULL, "floor0 number of books: %u\n",
619 floor_setup->data.t0.num_books);
620 av_dlog(NULL, "floor0 book list pointer: %p\n",
621 floor_setup->data.t0.book_list);
624 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
625 av_dlog(NULL, " Book %d: %u\n", idx + 1,
626 floor_setup->data.t0.book_list[idx]);
630 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
637 // Process residues part
639 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
641 GetBitContext *gb = &vc->gb;
644 vc->residue_count = get_bits(gb, 6)+1;
645 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
647 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
649 for (i = 0; i < vc->residue_count; ++i) {
650 vorbis_residue *res_setup = &vc->residues[i];
652 unsigned high_bits, low_bits;
654 res_setup->type = get_bits(gb, 16);
656 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
658 res_setup->begin = get_bits(gb, 24);
659 res_setup->end = get_bits(gb, 24);
660 res_setup->partition_size = get_bits(gb, 24) + 1;
661 /* Validations to prevent a buffer overflow later. */
662 if (res_setup->begin>res_setup->end ||
663 res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
664 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
665 av_log(vc->avccontext, AV_LOG_ERROR,
666 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
667 res_setup->type, res_setup->begin, res_setup->end,
668 res_setup->partition_size, vc->blocksize[1] / 2);
672 res_setup->classifications = get_bits(gb, 6) + 1;
673 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
675 res_setup->ptns_to_read =
676 (res_setup->end - res_setup->begin) / res_setup->partition_size;
677 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
679 sizeof(*res_setup->classifs));
680 if (!res_setup->classifs)
681 return AVERROR(ENOMEM);
683 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
684 res_setup->begin, res_setup->end, res_setup->partition_size,
685 res_setup->classifications, res_setup->classbook);
687 for (j = 0; j < res_setup->classifications; ++j) {
689 low_bits = get_bits(gb, 3);
691 high_bits = get_bits(gb, 5);
692 cascade[j] = (high_bits << 3) + low_bits;
694 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
697 res_setup->maxpass = 0;
698 for (j = 0; j < res_setup->classifications; ++j) {
699 for (k = 0; k < 8; ++k) {
700 if (cascade[j]&(1 << k)) {
701 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
703 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
704 j, k, res_setup->books[j][k]);
706 if (k>res_setup->maxpass)
707 res_setup->maxpass = k;
709 res_setup->books[j][k] = -1;
717 // Process mappings part
719 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
721 GetBitContext *gb = &vc->gb;
724 vc->mapping_count = get_bits(gb, 6)+1;
725 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
727 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
729 for (i = 0; i < vc->mapping_count; ++i) {
730 vorbis_mapping *mapping_setup = &vc->mappings[i];
732 if (get_bits(gb, 16)) {
733 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
737 mapping_setup->submaps = get_bits(gb, 4) + 1;
739 mapping_setup->submaps = 1;
743 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
744 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
745 sizeof(*mapping_setup->magnitude));
746 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
747 sizeof(*mapping_setup->angle));
748 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
749 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
750 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
753 mapping_setup->coupling_steps = 0;
756 av_dlog(NULL, " %u mapping coupling steps: %d\n",
757 i, mapping_setup->coupling_steps);
759 if (get_bits(gb, 2)) {
760 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
761 return -1; // following spec.
764 if (mapping_setup->submaps>1) {
765 mapping_setup->mux = av_mallocz(vc->audio_channels *
766 sizeof(*mapping_setup->mux));
767 for (j = 0; j < vc->audio_channels; ++j)
768 mapping_setup->mux[j] = get_bits(gb, 4);
771 for (j = 0; j < mapping_setup->submaps; ++j) {
772 skip_bits(gb, 8); // FIXME check?
773 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
774 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
776 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
777 mapping_setup->submap_floor[j],
778 mapping_setup->submap_residue[j]);
784 // Process modes part
786 static void create_map(vorbis_context *vc, unsigned floor_number)
788 vorbis_floor *floors = vc->floors;
794 for (blockflag = 0; blockflag < 2; ++blockflag) {
795 n = vc->blocksize[blockflag] / 2;
796 floors[floor_number].data.t0.map[blockflag] =
797 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
799 map = floors[floor_number].data.t0.map[blockflag];
800 vf = &floors[floor_number].data.t0;
802 for (idx = 0; idx < n; ++idx) {
803 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
804 ((vf->bark_map_size) /
805 BARK(vf->rate / 2.0f)));
806 if (vf->bark_map_size-1 < map[idx])
807 map[idx] = vf->bark_map_size - 1;
810 vf->map_size[blockflag] = n;
813 for (idx = 0; idx <= n; ++idx) {
814 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
818 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
820 GetBitContext *gb = &vc->gb;
823 vc->mode_count = get_bits(gb, 6) + 1;
824 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
826 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
828 for (i = 0; i < vc->mode_count; ++i) {
829 vorbis_mode *mode_setup = &vc->modes[i];
831 mode_setup->blockflag = get_bits1(gb);
832 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
833 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
834 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
836 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
837 i, mode_setup->blockflag, mode_setup->windowtype,
838 mode_setup->transformtype, mode_setup->mapping);
843 // Process the whole setup header using the functions above
845 static int vorbis_parse_setup_hdr(vorbis_context *vc)
847 GetBitContext *gb = &vc->gb;
849 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
850 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
851 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
852 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
856 if (vorbis_parse_setup_hdr_codebooks(vc)) {
857 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
860 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
861 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
864 if (vorbis_parse_setup_hdr_floors(vc)) {
865 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
868 if (vorbis_parse_setup_hdr_residues(vc)) {
869 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
872 if (vorbis_parse_setup_hdr_mappings(vc)) {
873 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
876 if (vorbis_parse_setup_hdr_modes(vc)) {
877 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
880 if (!get_bits1(gb)) {
881 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
882 return -8; // framing flag bit unset error
888 // Process the identification header
890 static int vorbis_parse_id_hdr(vorbis_context *vc)
892 GetBitContext *gb = &vc->gb;
895 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
896 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
897 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
898 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
902 vc->version = get_bits_long(gb, 32); //FIXME check 0
903 vc->audio_channels = get_bits(gb, 8);
904 if (vc->audio_channels <= 0) {
905 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
908 vc->audio_samplerate = get_bits_long(gb, 32);
909 if (vc->audio_samplerate <= 0) {
910 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
913 vc->bitrate_maximum = get_bits_long(gb, 32);
914 vc->bitrate_nominal = get_bits_long(gb, 32);
915 vc->bitrate_minimum = get_bits_long(gb, 32);
916 bl0 = get_bits(gb, 4);
917 bl1 = get_bits(gb, 4);
918 vc->blocksize[0] = (1 << bl0);
919 vc->blocksize[1] = (1 << bl1);
920 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
921 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
924 // output format int16
925 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
926 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
927 "output packets too large.\n");
930 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
931 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
933 if ((get_bits1(gb)) == 0) {
934 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
938 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
939 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
940 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
941 vc->previous_window = 0;
943 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
944 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
946 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 ",
947 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
950 BLK = vc->blocksize[0];
951 for (i = 0; i < BLK / 2; ++i) {
952 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)));
959 // Process the extradata using the functions above (identification header, setup header)
961 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
963 vorbis_context *vc = avccontext->priv_data ;
964 uint8_t *headers = avccontext->extradata;
965 int headers_len = avccontext->extradata_size;
966 uint8_t *header_start[3];
968 GetBitContext *gb = &(vc->gb);
971 vc->avccontext = avccontext;
972 dsputil_init(&vc->dsp, avccontext);
973 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
975 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
976 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
977 vc->scale_bias = 1.0f;
979 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
980 vc->scale_bias = 32768.0f;
984 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
988 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
989 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
993 init_get_bits(gb, header_start[0], header_len[0]*8);
994 hdr_type = get_bits(gb, 8);
996 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
999 if (vorbis_parse_id_hdr(vc)) {
1000 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1005 init_get_bits(gb, header_start[2], header_len[2]*8);
1006 hdr_type = get_bits(gb, 8);
1007 if (hdr_type != 5) {
1008 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1012 if (vorbis_parse_setup_hdr(vc)) {
1013 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1018 if (vc->audio_channels > 8)
1019 avccontext->channel_layout = 0;
1021 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1023 avccontext->channels = vc->audio_channels;
1024 avccontext->sample_rate = vc->audio_samplerate;
1025 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1030 // Decode audiopackets -------------------------------------------------
1032 // Read and decode floor
1034 static int vorbis_floor0_decode(vorbis_context *vc,
1035 vorbis_floor_data *vfu, float *vec)
1037 vorbis_floor0 *vf = &vfu->t0;
1038 float *lsp = vf->lsp;
1039 unsigned amplitude, book_idx;
1040 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1042 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1043 if (amplitude > 0) {
1045 unsigned idx, lsp_len = 0;
1046 vorbis_codebook codebook;
1048 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1049 if (book_idx >= vf->num_books) {
1050 av_log(vc->avccontext, AV_LOG_ERROR,
1051 "floor0 dec: booknumber too high!\n");
1054 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1055 codebook = vc->codebooks[vf->book_list[book_idx]];
1056 /* Invalid codebook! */
1057 if (!codebook.codevectors)
1060 while (lsp_len<vf->order) {
1063 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1064 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1065 /* read temp vector */
1066 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1067 codebook.nb_bits, codebook.maxdepth)
1068 * codebook.dimensions;
1069 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1070 /* copy each vector component and add last to it */
1071 for (idx = 0; idx < codebook.dimensions; ++idx)
1072 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1073 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1075 lsp_len += codebook.dimensions;
1077 /* DEBUG: output lsp coeffs */
1080 for (idx = 0; idx < lsp_len; ++idx)
1081 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1084 /* synthesize floor output vector */
1087 int order = vf->order;
1088 float wstep = M_PI / vf->bark_map_size;
1090 for (i = 0; i < order; i++)
1091 lsp[i] = 2.0f * cos(lsp[i]);
1093 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1094 vf->map_size[blockflag], order, wstep);
1097 while (i < vf->map_size[blockflag]) {
1098 int j, iter_cond = vf->map[blockflag][i];
1101 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1103 /* similar part for the q and p products */
1104 for (j = 0; j + 1 < order; j += 2) {
1105 q *= lsp[j] - two_cos_w;
1106 p *= lsp[j + 1] - two_cos_w;
1108 if (j == order) { // even order
1109 p *= p * (2.0f - two_cos_w);
1110 q *= q * (2.0f + two_cos_w);
1111 } else { // odd order
1112 q *= two_cos_w-lsp[j]; // one more time for q
1114 /* final step and square */
1115 p *= p * (4.f - two_cos_w * two_cos_w);
1119 /* calculate linear floor value */
1120 q = exp((((amplitude*vf->amplitude_offset) /
1121 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1122 - vf->amplitude_offset) * .11512925f);
1127 } while (vf->map[blockflag][i] == iter_cond);
1131 /* this channel is unused */
1135 av_dlog(NULL, " Floor0 decoded\n");
1140 static int vorbis_floor1_decode(vorbis_context *vc,
1141 vorbis_floor_data *vfu, float *vec)
1143 vorbis_floor1 *vf = &vfu->t1;
1144 GetBitContext *gb = &vc->gb;
1145 uint16_t range_v[4] = { 256, 128, 86, 64 };
1146 unsigned range = range_v[vf->multiplier - 1];
1147 uint16_t floor1_Y[258];
1148 uint16_t floor1_Y_final[258];
1149 int floor1_flag[258];
1150 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1151 int book, adx, ady, dy, off, predicted, err;
1154 if (!get_bits1(gb)) // silence
1157 // Read values (or differences) for the floor's points
1159 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1160 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1162 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1165 for (i = 0; i < vf->partitions; ++i) {
1166 partition_class = vf->partition_class[i];
1167 cdim = vf->class_dimensions[partition_class];
1168 cbits = vf->class_subclasses[partition_class];
1169 csub = (1 << cbits) - 1;
1172 av_dlog(NULL, "Cbits %u\n", cbits);
1174 if (cbits) // this reads all subclasses for this partition's class
1175 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1176 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1178 for (j = 0; j < cdim; ++j) {
1179 book = vf->subclass_books[partition_class][cval & csub];
1181 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1182 book, cbits, cval, get_bits_count(gb));
1184 cval = cval >> cbits;
1186 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1187 vc->codebooks[book].nb_bits, 3);
1189 floor1_Y[offset+j] = 0;
1192 av_dlog(NULL, " floor(%d) = %d \n",
1193 vf->list[offset+j].x, floor1_Y[offset+j]);
1198 // Amplitude calculation from the differences
1202 floor1_Y_final[0] = floor1_Y[0];
1203 floor1_Y_final[1] = floor1_Y[1];
1205 for (i = 2; i < vf->x_list_dim; ++i) {
1206 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1208 low_neigh_offs = vf->list[i].low;
1209 high_neigh_offs = vf->list[i].high;
1210 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1211 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1213 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1216 predicted = floor1_Y_final[low_neigh_offs] - off;
1218 predicted = floor1_Y_final[low_neigh_offs] + off;
1219 } // render_point end
1222 highroom = range-predicted;
1223 lowroom = predicted;
1224 if (highroom < lowroom) {
1225 room = highroom * 2;
1227 room = lowroom * 2; // SPEC mispelling
1230 floor1_flag[low_neigh_offs] = 1;
1231 floor1_flag[high_neigh_offs] = 1;
1234 if (highroom > lowroom) {
1235 floor1_Y_final[i] = val - lowroom + predicted;
1237 floor1_Y_final[i] = predicted - val + highroom - 1;
1241 floor1_Y_final[i] = predicted - (val + 1) / 2;
1243 floor1_Y_final[i] = predicted + val / 2;
1248 floor1_Y_final[i] = predicted;
1251 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1252 vf->list[i].x, floor1_Y_final[i], val);
1255 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1257 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1259 av_dlog(NULL, " Floor decoded\n");
1264 // Read and decode residue
1266 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1269 uint8_t *do_not_decode,
1274 GetBitContext *gb = &vc->gb;
1275 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1276 unsigned ptns_to_read = vr->ptns_to_read;
1277 uint8_t *classifs = vr->classifs;
1278 unsigned pass, ch_used, i, j, k, l;
1281 for (j = 1; j < ch; ++j)
1282 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1283 if (do_not_decode[0])
1290 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1292 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1293 uint16_t voffset, partition_count, j_times_ptns_to_read;
1295 voffset = vr->begin;
1296 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1298 unsigned inverse_class = ff_inverse[vr->classifications];
1299 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1300 if (!do_not_decode[j]) {
1301 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1302 vc->codebooks[vr->classbook].nb_bits, 3);
1304 av_dlog(NULL, "Classword: %u\n", temp);
1306 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1307 for (i = 0; i < c_p_c; ++i) {
1310 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1311 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1312 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1316 j_times_ptns_to_read += ptns_to_read;
1319 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1320 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1323 if (!do_not_decode[j]) {
1324 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1325 int vqbook = vr->books[vqclass][pass];
1327 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1329 unsigned dim = vc->codebooks[vqbook].dimensions;
1330 unsigned step = dim == 1 ? vr->partition_size
1331 : FASTDIV(vr->partition_size, dim);
1332 vorbis_codebook codebook = vc->codebooks[vqbook];
1336 voffs = voffset+j*vlen;
1337 for (k = 0; k < step; ++k) {
1338 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1339 for (l = 0; l < dim; ++l)
1340 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1342 } else if (vr_type == 1) {
1343 voffs = voffset + j * vlen;
1344 for (k = 0; k < step; ++k) {
1345 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1346 for (l = 0; l < dim; ++l, ++voffs) {
1347 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1349 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1350 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1353 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1354 voffs = voffset >> 1;
1357 for (k = 0; k < step; ++k) {
1358 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1359 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1360 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1362 } else if (dim == 4) {
1363 for (k = 0; k < step; ++k, voffs += 2) {
1364 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1365 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1366 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1367 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1368 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1371 for (k = 0; k < step; ++k) {
1372 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1373 for (l = 0; l < dim; l += 2, voffs++) {
1374 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1375 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1377 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1378 pass, voffset / ch + (voffs % ch) * vlen,
1379 vec[voffset / ch + (voffs % ch) * vlen],
1380 codebook.codevectors[coffs + l], coffs, l);
1384 } else if (vr_type == 2) {
1387 for (k = 0; k < step; ++k) {
1388 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1389 for (l = 0; l < dim; ++l, ++voffs) {
1390 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
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);
1401 j_times_ptns_to_read += ptns_to_read;
1404 voffset += vr->partition_size;
1411 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1413 uint8_t *do_not_decode,
1414 float *vec, unsigned vlen)
1417 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1418 else if (vr->type == 1)
1419 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1420 else if (vr->type == 0)
1421 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1423 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1428 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1431 for (i = 0; i < blocksize; i++) {
1434 ang[i] = mag[i] - ang[i];
1436 float temp = ang[i];
1444 float temp = ang[i];
1452 // Decode the audio packet using the functions above
1454 static int vorbis_parse_audio_packet(vorbis_context *vc)
1456 GetBitContext *gb = &vc->gb;
1458 unsigned previous_window = vc->previous_window;
1459 unsigned mode_number, blockflag, blocksize;
1461 uint8_t no_residue[255];
1462 uint8_t do_not_decode[255];
1463 vorbis_mapping *mapping;
1464 float *ch_res_ptr = vc->channel_residues;
1465 float *ch_floor_ptr = vc->channel_floors;
1466 uint8_t res_chan[255];
1467 unsigned res_num = 0;
1470 if (get_bits1(gb)) {
1471 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1472 return -1; // packet type not audio
1475 if (vc->mode_count == 1) {
1478 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1480 vc->mode_number = mode_number;
1481 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1483 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1484 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1486 blockflag = vc->modes[mode_number].blockflag;
1487 blocksize = vc->blocksize[blockflag];
1489 skip_bits(gb, 2); // previous_window, next_window
1491 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1492 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1496 for (i = 0; i < vc->audio_channels; ++i) {
1497 vorbis_floor *floor;
1499 if (mapping->submaps > 1) {
1500 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1502 floor = &vc->floors[mapping->submap_floor[0]];
1505 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1508 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1511 no_residue[i] = ret;
1512 ch_floor_ptr += blocksize / 2;
1515 // Nonzero vector propagate
1517 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1518 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1519 no_residue[mapping->magnitude[i]] = 0;
1520 no_residue[mapping->angle[i]] = 0;
1526 for (i = 0; i < mapping->submaps; ++i) {
1527 vorbis_residue *residue;
1530 for (j = 0; j < vc->audio_channels; ++j) {
1531 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1532 res_chan[j] = res_num;
1533 if (no_residue[j]) {
1534 do_not_decode[ch] = 1;
1536 do_not_decode[ch] = 0;
1542 residue = &vc->residues[mapping->submap_residue[i]];
1543 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1545 ch_res_ptr += ch * blocksize / 2;
1550 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1553 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1554 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1555 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1560 mdct = &vc->mdct[blockflag];
1562 for (j = vc->audio_channels-1;j >= 0; j--) {
1563 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1564 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1565 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1566 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1569 // Overlap/add, save data for next overlapping FPMATH
1571 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1572 for (j = 0; j < vc->audio_channels; j++) {
1573 unsigned bs0 = vc->blocksize[0];
1574 unsigned bs1 = vc->blocksize[1];
1575 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1576 float *saved = vc->saved + j * bs1 / 4;
1577 float *ret = vc->channel_floors + j * retlen;
1578 float *buf = residue;
1579 const float *win = vc->win[blockflag & previous_window];
1581 if (blockflag == previous_window) {
1582 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1583 } else if (blockflag > previous_window) {
1584 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1585 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1587 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1588 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1590 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1593 vc->previous_window = blockflag;
1597 // Return the decoded audio packet through the standard api
1599 static int vorbis_decode_frame(AVCodecContext *avccontext,
1600 void *data, int *data_size,
1603 const uint8_t *buf = avpkt->data;
1604 int buf_size = avpkt->size;
1605 vorbis_context *vc = avccontext->priv_data ;
1606 GetBitContext *gb = &(vc->gb);
1607 const float *channel_ptrs[255];
1613 av_dlog(NULL, "packet length %d \n", buf_size);
1615 init_get_bits(gb, buf, buf_size*8);
1617 len = vorbis_parse_audio_packet(vc);
1624 if (!vc->first_frame) {
1625 vc->first_frame = 1;
1630 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1631 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1633 if (vc->audio_channels > 8) {
1634 for (i = 0; i < vc->audio_channels; i++)
1635 channel_ptrs[i] = vc->channel_floors + i * len;
1637 for (i = 0; i < vc->audio_channels; i++)
1638 channel_ptrs[i] = vc->channel_floors +
1639 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1642 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
1643 vc->fmt_conv.float_interleave(data, channel_ptrs, len, vc->audio_channels);
1645 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1646 vc->audio_channels);
1648 *data_size = len * vc->audio_channels *
1649 av_get_bytes_per_sample(avccontext->sample_fmt);
1656 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1658 vorbis_context *vc = avccontext->priv_data;
1665 AVCodec ff_vorbis_decoder = {
1669 sizeof(vorbis_context),
1672 vorbis_decode_close,
1673 vorbis_decode_frame,
1674 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1675 .channel_layouts = ff_vorbis_channel_layouts,
1676 .sample_fmts = (const enum AVSampleFormat[]) {
1677 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE