2 * This file is part of Libav.
4 * Libav is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * Libav is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with Libav; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 * @author Denes Balatoni ( dbalatoni programozo hu )
28 #define ALT_BITSTREAM_READER_LE
33 #include "fmtconvert.h"
40 #define V_MAX_VLCS (1 << 16)
41 #define V_MAX_PARTITIONS (1 << 20)
55 typedef union vorbis_floor_u vorbis_floor_data;
56 typedef struct vorbis_floor0_s vorbis_floor0;
57 typedef struct vorbis_floor1_s vorbis_floor1;
58 struct vorbis_context_s;
60 int (* vorbis_floor_decode_func)
61 (struct vorbis_context_s *, vorbis_floor_data *, float *);
64 vorbis_floor_decode_func decode;
65 union vorbis_floor_u {
66 struct vorbis_floor0_s {
69 uint16_t bark_map_size;
72 uint8_t amplitude_bits;
73 uint8_t amplitude_offset;
78 struct vorbis_floor1_s {
80 uint8_t partition_class[32];
81 uint8_t class_dimensions[16];
82 uint8_t class_subclasses[16];
83 uint8_t class_masterbook[16];
84 int16_t subclass_books[16][8];
87 vorbis_floor1_entry *list;
96 unsigned partition_size;
97 uint8_t classifications;
101 uint16_t ptns_to_read;
107 uint16_t coupling_steps;
111 uint8_t submap_floor[16];
112 uint8_t submap_residue[16];
118 uint16_t transformtype;
122 typedef struct vorbis_context_s {
123 AVCodecContext *avccontext;
126 FmtConvertContext fmt_conv;
131 uint8_t audio_channels;
132 uint32_t audio_samplerate;
133 uint32_t bitrate_maximum;
134 uint32_t bitrate_nominal;
135 uint32_t bitrate_minimum;
136 uint32_t blocksize[2];
138 uint16_t codebook_count;
139 vorbis_codebook *codebooks;
141 vorbis_floor *floors;
142 uint8_t residue_count;
143 vorbis_residue *residues;
144 uint8_t mapping_count;
145 vorbis_mapping *mappings;
148 uint8_t mode_number; // mode number for the current packet
149 uint8_t previous_window;
150 float *channel_residues;
151 float *channel_floors;
153 float scale_bias; // for float->int conversion
156 /* Helper functions */
159 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
161 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
162 #define VALIDATE_INDEX(idx, limit) \
164 av_log(vc->avccontext, AV_LOG_ERROR,\
166 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
169 #define GET_VALIDATED_INDEX(idx, bits, limit) \
171 idx = get_bits(gb, bits);\
172 VALIDATE_INDEX(idx, limit)\
175 static float vorbisfloat2float(unsigned val)
177 double mant = val & 0x1fffff;
178 long exp = (val & 0x7fe00000L) >> 21;
179 if (val & 0x80000000)
181 return ldexp(mant, exp - 20 - 768);
185 // Free all allocated memory -----------------------------------------
187 static void vorbis_free(vorbis_context *vc)
191 av_freep(&vc->channel_residues);
192 av_freep(&vc->channel_floors);
193 av_freep(&vc->saved);
195 for (i = 0; i < vc->residue_count; i++)
196 av_free(vc->residues[i].classifs);
197 av_freep(&vc->residues);
198 av_freep(&vc->modes);
200 ff_mdct_end(&vc->mdct[0]);
201 ff_mdct_end(&vc->mdct[1]);
203 for (i = 0; i < vc->codebook_count; ++i) {
204 av_free(vc->codebooks[i].codevectors);
205 free_vlc(&vc->codebooks[i].vlc);
207 av_freep(&vc->codebooks);
209 for (i = 0; i < vc->floor_count; ++i) {
210 if (vc->floors[i].floor_type == 0) {
211 av_free(vc->floors[i].data.t0.map[0]);
212 av_free(vc->floors[i].data.t0.map[1]);
213 av_free(vc->floors[i].data.t0.book_list);
214 av_free(vc->floors[i].data.t0.lsp);
216 av_free(vc->floors[i].data.t1.list);
219 av_freep(&vc->floors);
221 for (i = 0; i < vc->mapping_count; ++i) {
222 av_free(vc->mappings[i].magnitude);
223 av_free(vc->mappings[i].angle);
224 av_free(vc->mappings[i].mux);
226 av_freep(&vc->mappings);
229 // Parse setup header -------------------------------------------------
231 // Process codebooks part
233 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
236 uint8_t *tmp_vlc_bits;
237 uint32_t *tmp_vlc_codes;
238 GetBitContext *gb = &vc->gb;
239 uint16_t *codebook_multiplicands;
241 vc->codebook_count = get_bits(gb, 8) + 1;
243 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
245 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
246 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
247 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
248 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
250 for (cb = 0; cb < vc->codebook_count; ++cb) {
251 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
252 unsigned ordered, t, entries, used_entries = 0;
254 av_dlog(NULL, " %u. Codebook\n", cb);
256 if (get_bits(gb, 24) != 0x564342) {
257 av_log(vc->avccontext, AV_LOG_ERROR,
258 " %u. Codebook setup data corrupt.\n", cb);
262 codebook_setup->dimensions=get_bits(gb, 16);
263 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
264 av_log(vc->avccontext, AV_LOG_ERROR,
265 " %u. Codebook's dimension is invalid (%d).\n",
266 cb, codebook_setup->dimensions);
269 entries = get_bits(gb, 24);
270 if (entries > V_MAX_VLCS) {
271 av_log(vc->avccontext, AV_LOG_ERROR,
272 " %u. Codebook has too many entries (%u).\n",
277 ordered = get_bits1(gb);
279 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
280 codebook_setup->dimensions, entries);
284 unsigned sparse = get_bits1(gb);
286 av_dlog(NULL, " not ordered \n");
289 av_dlog(NULL, " sparse \n");
292 for (ce = 0; ce < entries; ++ce) {
293 flag = get_bits1(gb);
295 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
298 tmp_vlc_bits[ce] = 0;
301 av_dlog(NULL, " not sparse \n");
303 used_entries = entries;
304 for (ce = 0; ce < entries; ++ce)
305 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
308 unsigned current_entry = 0;
309 unsigned current_length = get_bits(gb, 5) + 1;
311 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
313 used_entries = entries;
314 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
317 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
319 number = get_bits(gb, ilog(entries - current_entry));
321 av_dlog(NULL, " number: %u\n", number);
323 for (i = current_entry; i < number+current_entry; ++i)
324 if (i < used_entries)
325 tmp_vlc_bits[i] = current_length;
327 current_entry+=number;
329 if (current_entry>used_entries) {
330 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
335 codebook_setup->lookup_type = get_bits(gb, 4);
337 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
338 codebook_setup->lookup_type ? "vq" : "no lookup");
340 // If the codebook is used for (inverse) VQ, calculate codevectors.
342 if (codebook_setup->lookup_type == 1) {
344 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
346 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
347 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
348 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
349 unsigned codebook_sequence_p = get_bits1(gb);
351 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
352 codebook_lookup_values);
353 av_dlog(NULL, " delta %f minmum %f \n",
354 codebook_delta_value, codebook_minimum_value);
356 for (i = 0; i < codebook_lookup_values; ++i) {
357 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
359 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
360 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
361 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
364 // Weed out unused vlcs and build codevector vector
365 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
366 codebook_setup->dimensions *
367 sizeof(*codebook_setup->codevectors))
369 for (j = 0, i = 0; i < entries; ++i) {
370 unsigned dim = codebook_setup->dimensions;
372 if (tmp_vlc_bits[i]) {
374 unsigned lookup_offset = i;
376 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
378 for (k = 0; k < dim; ++k) {
379 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
380 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
381 if (codebook_sequence_p)
382 last = codebook_setup->codevectors[j * dim + k];
383 lookup_offset/=codebook_lookup_values;
385 tmp_vlc_bits[j] = tmp_vlc_bits[i];
387 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
388 for (k = 0; k < dim; ++k)
389 av_dlog(vc->avccontext, " %f ",
390 codebook_setup->codevectors[j * dim + k]);
391 av_dlog(vc->avccontext, "\n");
396 if (j != used_entries) {
397 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
400 entries = used_entries;
401 } else if (codebook_setup->lookup_type >= 2) {
402 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
406 // Initialize VLC table
407 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
408 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
411 codebook_setup->maxdepth = 0;
412 for (t = 0; t < entries; ++t)
413 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
414 codebook_setup->maxdepth = tmp_vlc_bits[t];
416 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
417 codebook_setup->nb_bits = V_NB_BITS2;
419 codebook_setup->nb_bits = V_NB_BITS;
421 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
423 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)) {
424 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
429 av_free(tmp_vlc_bits);
430 av_free(tmp_vlc_codes);
431 av_free(codebook_multiplicands);
436 av_free(tmp_vlc_bits);
437 av_free(tmp_vlc_codes);
438 av_free(codebook_multiplicands);
442 // Process time domain transforms part (unused in Vorbis I)
444 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
446 GetBitContext *gb = &vc->gb;
447 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
449 for (i = 0; i < vorbis_time_count; ++i) {
450 unsigned vorbis_tdtransform = get_bits(gb, 16);
452 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
453 vorbis_time_count, vorbis_tdtransform);
455 if (vorbis_tdtransform) {
456 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
463 // Process floors part
465 static int vorbis_floor0_decode(vorbis_context *vc,
466 vorbis_floor_data *vfu, float *vec);
467 static void create_map(vorbis_context *vc, unsigned floor_number);
468 static int vorbis_floor1_decode(vorbis_context *vc,
469 vorbis_floor_data *vfu, float *vec);
470 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
472 GetBitContext *gb = &vc->gb;
475 vc->floor_count = get_bits(gb, 6) + 1;
477 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
479 for (i = 0; i < vc->floor_count; ++i) {
480 vorbis_floor *floor_setup = &vc->floors[i];
482 floor_setup->floor_type = get_bits(gb, 16);
484 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
486 if (floor_setup->floor_type == 1) {
487 int maximum_class = -1;
488 unsigned rangebits, rangemax, floor1_values = 2;
490 floor_setup->decode = vorbis_floor1_decode;
492 floor_setup->data.t1.partitions = get_bits(gb, 5);
494 av_dlog(NULL, " %d.floor: %d partitions \n",
495 i, floor_setup->data.t1.partitions);
497 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
498 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
499 if (floor_setup->data.t1.partition_class[j] > maximum_class)
500 maximum_class = floor_setup->data.t1.partition_class[j];
502 av_dlog(NULL, " %d. floor %d partition class %d \n",
503 i, j, floor_setup->data.t1.partition_class[j]);
507 av_dlog(NULL, " maximum class %d \n", maximum_class);
509 for (j = 0; j <= maximum_class; ++j) {
510 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
511 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
513 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
514 floor_setup->data.t1.class_dimensions[j],
515 floor_setup->data.t1.class_subclasses[j]);
517 if (floor_setup->data.t1.class_subclasses[j]) {
518 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
520 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
523 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
524 int16_t bits = get_bits(gb, 8) - 1;
526 VALIDATE_INDEX(bits, vc->codebook_count)
527 floor_setup->data.t1.subclass_books[j][k] = bits;
529 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
533 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
534 floor_setup->data.t1.x_list_dim = 2;
536 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
537 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
539 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
540 sizeof(*floor_setup->data.t1.list));
543 rangebits = get_bits(gb, 4);
544 rangemax = (1 << rangebits);
545 if (rangemax > vc->blocksize[1] / 2) {
546 av_log(vc->avccontext, AV_LOG_ERROR,
547 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
548 rangemax, vc->blocksize[1] / 2);
551 floor_setup->data.t1.list[0].x = 0;
552 floor_setup->data.t1.list[1].x = rangemax;
554 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
555 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
556 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
558 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
559 floor_setup->data.t1.list[floor1_values].x);
563 // Precalculate order of x coordinates - needed for decode
564 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
565 } else if (floor_setup->floor_type == 0) {
566 unsigned max_codebook_dim = 0;
568 floor_setup->decode = vorbis_floor0_decode;
570 floor_setup->data.t0.order = get_bits(gb, 8);
571 floor_setup->data.t0.rate = get_bits(gb, 16);
572 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
573 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
574 /* zero would result in a div by zero later *
576 if (floor_setup->data.t0.amplitude_bits == 0) {
577 av_log(vc->avccontext, AV_LOG_ERROR,
578 "Floor 0 amplitude bits is 0.\n");
581 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
582 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
584 /* allocate mem for booklist */
585 floor_setup->data.t0.book_list =
586 av_malloc(floor_setup->data.t0.num_books);
587 if (!floor_setup->data.t0.book_list)
589 /* read book indexes */
593 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
594 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
595 floor_setup->data.t0.book_list[idx] = book_idx;
596 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
597 max_codebook_dim = vc->codebooks[book_idx].dimensions;
603 /* codebook dim is for padding if codebook dim doesn't *
604 * divide order+1 then we need to read more data */
605 floor_setup->data.t0.lsp =
606 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
607 * sizeof(*floor_setup->data.t0.lsp));
608 if (!floor_setup->data.t0.lsp)
611 /* debug output parsed headers */
612 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
613 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
614 av_dlog(NULL, "floor0 bark map size: %u\n",
615 floor_setup->data.t0.bark_map_size);
616 av_dlog(NULL, "floor0 amplitude bits: %u\n",
617 floor_setup->data.t0.amplitude_bits);
618 av_dlog(NULL, "floor0 amplitude offset: %u\n",
619 floor_setup->data.t0.amplitude_offset);
620 av_dlog(NULL, "floor0 number of books: %u\n",
621 floor_setup->data.t0.num_books);
622 av_dlog(NULL, "floor0 book list pointer: %p\n",
623 floor_setup->data.t0.book_list);
626 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
627 av_dlog(NULL, " Book %d: %u\n", idx + 1,
628 floor_setup->data.t0.book_list[idx]);
632 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
639 // Process residues part
641 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
643 GetBitContext *gb = &vc->gb;
646 vc->residue_count = get_bits(gb, 6)+1;
647 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
649 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
651 for (i = 0; i < vc->residue_count; ++i) {
652 vorbis_residue *res_setup = &vc->residues[i];
654 unsigned high_bits, low_bits;
656 res_setup->type = get_bits(gb, 16);
658 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
660 res_setup->begin = get_bits(gb, 24);
661 res_setup->end = get_bits(gb, 24);
662 res_setup->partition_size = get_bits(gb, 24) + 1;
663 /* Validations to prevent a buffer overflow later. */
664 if (res_setup->begin>res_setup->end ||
665 res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
666 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
667 av_log(vc->avccontext, AV_LOG_ERROR,
668 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
669 res_setup->type, res_setup->begin, res_setup->end,
670 res_setup->partition_size, vc->blocksize[1] / 2);
674 res_setup->classifications = get_bits(gb, 6) + 1;
675 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
677 res_setup->ptns_to_read =
678 (res_setup->end - res_setup->begin) / res_setup->partition_size;
679 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
681 sizeof(*res_setup->classifs));
682 if (!res_setup->classifs)
683 return AVERROR(ENOMEM);
685 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
686 res_setup->begin, res_setup->end, res_setup->partition_size,
687 res_setup->classifications, res_setup->classbook);
689 for (j = 0; j < res_setup->classifications; ++j) {
691 low_bits = get_bits(gb, 3);
693 high_bits = get_bits(gb, 5);
694 cascade[j] = (high_bits << 3) + low_bits;
696 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
699 res_setup->maxpass = 0;
700 for (j = 0; j < res_setup->classifications; ++j) {
701 for (k = 0; k < 8; ++k) {
702 if (cascade[j]&(1 << k)) {
703 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
705 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
706 j, k, res_setup->books[j][k]);
708 if (k>res_setup->maxpass)
709 res_setup->maxpass = k;
711 res_setup->books[j][k] = -1;
719 // Process mappings part
721 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
723 GetBitContext *gb = &vc->gb;
726 vc->mapping_count = get_bits(gb, 6)+1;
727 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
729 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
731 for (i = 0; i < vc->mapping_count; ++i) {
732 vorbis_mapping *mapping_setup = &vc->mappings[i];
734 if (get_bits(gb, 16)) {
735 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
739 mapping_setup->submaps = get_bits(gb, 4) + 1;
741 mapping_setup->submaps = 1;
745 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
746 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
747 sizeof(*mapping_setup->magnitude));
748 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
749 sizeof(*mapping_setup->angle));
750 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
751 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
752 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
755 mapping_setup->coupling_steps = 0;
758 av_dlog(NULL, " %u mapping coupling steps: %d\n",
759 i, mapping_setup->coupling_steps);
761 if (get_bits(gb, 2)) {
762 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
763 return -1; // following spec.
766 if (mapping_setup->submaps>1) {
767 mapping_setup->mux = av_mallocz(vc->audio_channels *
768 sizeof(*mapping_setup->mux));
769 for (j = 0; j < vc->audio_channels; ++j)
770 mapping_setup->mux[j] = get_bits(gb, 4);
773 for (j = 0; j < mapping_setup->submaps; ++j) {
774 skip_bits(gb, 8); // FIXME check?
775 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
776 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
778 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
779 mapping_setup->submap_floor[j],
780 mapping_setup->submap_residue[j]);
786 // Process modes part
788 static void create_map(vorbis_context *vc, unsigned floor_number)
790 vorbis_floor *floors = vc->floors;
796 for (blockflag = 0; blockflag < 2; ++blockflag) {
797 n = vc->blocksize[blockflag] / 2;
798 floors[floor_number].data.t0.map[blockflag] =
799 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
801 map = floors[floor_number].data.t0.map[blockflag];
802 vf = &floors[floor_number].data.t0;
804 for (idx = 0; idx < n; ++idx) {
805 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
806 ((vf->bark_map_size) /
807 BARK(vf->rate / 2.0f)));
808 if (vf->bark_map_size-1 < map[idx])
809 map[idx] = vf->bark_map_size - 1;
812 vf->map_size[blockflag] = n;
815 for (idx = 0; idx <= n; ++idx) {
816 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
820 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
822 GetBitContext *gb = &vc->gb;
825 vc->mode_count = get_bits(gb, 6) + 1;
826 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
828 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
830 for (i = 0; i < vc->mode_count; ++i) {
831 vorbis_mode *mode_setup = &vc->modes[i];
833 mode_setup->blockflag = get_bits1(gb);
834 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
835 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
836 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
838 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
839 i, mode_setup->blockflag, mode_setup->windowtype,
840 mode_setup->transformtype, mode_setup->mapping);
845 // Process the whole setup header using the functions above
847 static int vorbis_parse_setup_hdr(vorbis_context *vc)
849 GetBitContext *gb = &vc->gb;
851 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
852 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
853 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
854 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
858 if (vorbis_parse_setup_hdr_codebooks(vc)) {
859 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
862 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
863 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
866 if (vorbis_parse_setup_hdr_floors(vc)) {
867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
870 if (vorbis_parse_setup_hdr_residues(vc)) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
874 if (vorbis_parse_setup_hdr_mappings(vc)) {
875 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
878 if (vorbis_parse_setup_hdr_modes(vc)) {
879 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
882 if (!get_bits1(gb)) {
883 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
884 return -8; // framing flag bit unset error
890 // Process the identification header
892 static int vorbis_parse_id_hdr(vorbis_context *vc)
894 GetBitContext *gb = &vc->gb;
897 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
898 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
899 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
900 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
904 vc->version = get_bits_long(gb, 32); //FIXME check 0
905 vc->audio_channels = get_bits(gb, 8);
906 if (vc->audio_channels <= 0) {
907 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
910 vc->audio_samplerate = get_bits_long(gb, 32);
911 if (vc->audio_samplerate <= 0) {
912 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
915 vc->bitrate_maximum = get_bits_long(gb, 32);
916 vc->bitrate_nominal = get_bits_long(gb, 32);
917 vc->bitrate_minimum = get_bits_long(gb, 32);
918 bl0 = get_bits(gb, 4);
919 bl1 = get_bits(gb, 4);
920 vc->blocksize[0] = (1 << bl0);
921 vc->blocksize[1] = (1 << bl1);
922 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
923 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
926 // output format int16
927 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
928 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
929 "output packets too large.\n");
932 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
933 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
935 if ((get_bits1(gb)) == 0) {
936 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
940 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
941 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
942 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
943 vc->previous_window = 0;
945 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
946 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
948 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 ",
949 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
952 BLK = vc->blocksize[0];
953 for (i = 0; i < BLK / 2; ++i) {
954 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)));
961 // Process the extradata using the functions above (identification header, setup header)
963 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
965 vorbis_context *vc = avccontext->priv_data ;
966 uint8_t *headers = avccontext->extradata;
967 int headers_len = avccontext->extradata_size;
968 uint8_t *header_start[3];
970 GetBitContext *gb = &(vc->gb);
973 vc->avccontext = avccontext;
974 dsputil_init(&vc->dsp, avccontext);
975 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
977 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
978 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
979 vc->scale_bias = 1.0f;
981 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
982 vc->scale_bias = 32768.0f;
986 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
990 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
991 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
995 init_get_bits(gb, header_start[0], header_len[0]*8);
996 hdr_type = get_bits(gb, 8);
998 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1001 if (vorbis_parse_id_hdr(vc)) {
1002 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1007 init_get_bits(gb, header_start[2], header_len[2]*8);
1008 hdr_type = get_bits(gb, 8);
1009 if (hdr_type != 5) {
1010 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1014 if (vorbis_parse_setup_hdr(vc)) {
1015 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1020 if (vc->audio_channels > 8)
1021 avccontext->channel_layout = 0;
1023 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1025 avccontext->channels = vc->audio_channels;
1026 avccontext->sample_rate = vc->audio_samplerate;
1027 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1032 // Decode audiopackets -------------------------------------------------
1034 // Read and decode floor
1036 static int vorbis_floor0_decode(vorbis_context *vc,
1037 vorbis_floor_data *vfu, float *vec)
1039 vorbis_floor0 *vf = &vfu->t0;
1040 float *lsp = vf->lsp;
1041 unsigned amplitude, book_idx;
1042 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1044 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1045 if (amplitude > 0) {
1047 unsigned idx, lsp_len = 0;
1048 vorbis_codebook codebook;
1050 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1051 if (book_idx >= vf->num_books) {
1052 av_log(vc->avccontext, AV_LOG_ERROR,
1053 "floor0 dec: booknumber too high!\n");
1056 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1057 codebook = vc->codebooks[vf->book_list[book_idx]];
1058 /* Invalid codebook! */
1059 if (!codebook.codevectors)
1062 while (lsp_len<vf->order) {
1065 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1066 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1067 /* read temp vector */
1068 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1069 codebook.nb_bits, codebook.maxdepth)
1070 * codebook.dimensions;
1071 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1072 /* copy each vector component and add last to it */
1073 for (idx = 0; idx < codebook.dimensions; ++idx)
1074 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1075 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1077 lsp_len += codebook.dimensions;
1079 /* DEBUG: output lsp coeffs */
1082 for (idx = 0; idx < lsp_len; ++idx)
1083 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1086 /* synthesize floor output vector */
1089 int order = vf->order;
1090 float wstep = M_PI / vf->bark_map_size;
1092 for (i = 0; i < order; i++)
1093 lsp[i] = 2.0f * cos(lsp[i]);
1095 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1096 vf->map_size[blockflag], order, wstep);
1099 while (i < vf->map_size[blockflag]) {
1100 int j, iter_cond = vf->map[blockflag][i];
1103 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1105 /* similar part for the q and p products */
1106 for (j = 0; j + 1 < order; j += 2) {
1107 q *= lsp[j] - two_cos_w;
1108 p *= lsp[j + 1] - two_cos_w;
1110 if (j == order) { // even order
1111 p *= p * (2.0f - two_cos_w);
1112 q *= q * (2.0f + two_cos_w);
1113 } else { // odd order
1114 q *= two_cos_w-lsp[j]; // one more time for q
1116 /* final step and square */
1117 p *= p * (4.f - two_cos_w * two_cos_w);
1121 /* calculate linear floor value */
1122 q = exp((((amplitude*vf->amplitude_offset) /
1123 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1124 - vf->amplitude_offset) * .11512925f);
1129 } while (vf->map[blockflag][i] == iter_cond);
1133 /* this channel is unused */
1137 av_dlog(NULL, " Floor0 decoded\n");
1142 static int vorbis_floor1_decode(vorbis_context *vc,
1143 vorbis_floor_data *vfu, float *vec)
1145 vorbis_floor1 *vf = &vfu->t1;
1146 GetBitContext *gb = &vc->gb;
1147 uint16_t range_v[4] = { 256, 128, 86, 64 };
1148 unsigned range = range_v[vf->multiplier - 1];
1149 uint16_t floor1_Y[258];
1150 uint16_t floor1_Y_final[258];
1151 int floor1_flag[258];
1152 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1153 int book, adx, ady, dy, off, predicted, err;
1156 if (!get_bits1(gb)) // silence
1159 // Read values (or differences) for the floor's points
1161 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1162 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1164 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1167 for (i = 0; i < vf->partitions; ++i) {
1168 class = vf->partition_class[i];
1169 cdim = vf->class_dimensions[class];
1170 cbits = vf->class_subclasses[class];
1171 csub = (1 << cbits) - 1;
1174 av_dlog(NULL, "Cbits %u\n", cbits);
1176 if (cbits) // this reads all subclasses for this partition's class
1177 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1178 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1180 for (j = 0; j < cdim; ++j) {
1181 book = vf->subclass_books[class][cval & csub];
1183 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1184 book, cbits, cval, get_bits_count(gb));
1186 cval = cval >> cbits;
1188 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1189 vc->codebooks[book].nb_bits, 3);
1191 floor1_Y[offset+j] = 0;
1194 av_dlog(NULL, " floor(%d) = %d \n",
1195 vf->list[offset+j].x, floor1_Y[offset+j]);
1200 // Amplitude calculation from the differences
1204 floor1_Y_final[0] = floor1_Y[0];
1205 floor1_Y_final[1] = floor1_Y[1];
1207 for (i = 2; i < vf->x_list_dim; ++i) {
1208 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1210 low_neigh_offs = vf->list[i].low;
1211 high_neigh_offs = vf->list[i].high;
1212 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1213 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1215 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1218 predicted = floor1_Y_final[low_neigh_offs] - off;
1220 predicted = floor1_Y_final[low_neigh_offs] + off;
1221 } // render_point end
1224 highroom = range-predicted;
1225 lowroom = predicted;
1226 if (highroom < lowroom) {
1227 room = highroom * 2;
1229 room = lowroom * 2; // SPEC mispelling
1232 floor1_flag[low_neigh_offs] = 1;
1233 floor1_flag[high_neigh_offs] = 1;
1236 if (highroom > lowroom) {
1237 floor1_Y_final[i] = val - lowroom + predicted;
1239 floor1_Y_final[i] = predicted - val + highroom - 1;
1243 floor1_Y_final[i] = predicted - (val + 1) / 2;
1245 floor1_Y_final[i] = predicted + val / 2;
1250 floor1_Y_final[i] = predicted;
1253 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1254 vf->list[i].x, floor1_Y_final[i], val);
1257 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1259 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1261 av_dlog(NULL, " Floor decoded\n");
1266 // Read and decode residue
1268 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1271 uint8_t *do_not_decode,
1276 GetBitContext *gb = &vc->gb;
1277 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1278 unsigned ptns_to_read = vr->ptns_to_read;
1279 uint8_t *classifs = vr->classifs;
1280 unsigned pass, ch_used, i, j, k, l;
1283 for (j = 1; j < ch; ++j)
1284 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1285 if (do_not_decode[0])
1292 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1294 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1295 uint16_t voffset, partition_count, j_times_ptns_to_read;
1297 voffset = vr->begin;
1298 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1300 unsigned inverse_class = ff_inverse[vr->classifications];
1301 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1302 if (!do_not_decode[j]) {
1303 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1304 vc->codebooks[vr->classbook].nb_bits, 3);
1306 av_dlog(NULL, "Classword: %u\n", temp);
1308 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1309 for (i = 0; i < c_p_c; ++i) {
1312 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1313 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1314 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1318 j_times_ptns_to_read += ptns_to_read;
1321 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1322 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1325 if (!do_not_decode[j]) {
1326 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1327 int vqbook = vr->books[vqclass][pass];
1329 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1331 unsigned dim = vc->codebooks[vqbook].dimensions;
1332 unsigned step = dim == 1 ? vr->partition_size
1333 : FASTDIV(vr->partition_size, dim);
1334 vorbis_codebook codebook = vc->codebooks[vqbook];
1338 voffs = voffset+j*vlen;
1339 for (k = 0; k < step; ++k) {
1340 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1341 for (l = 0; l < dim; ++l)
1342 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1344 } else if (vr_type == 1) {
1345 voffs = voffset + j * vlen;
1346 for (k = 0; k < step; ++k) {
1347 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1348 for (l = 0; l < dim; ++l, ++voffs) {
1349 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1351 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1352 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1355 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1356 voffs = voffset >> 1;
1359 for (k = 0; k < step; ++k) {
1360 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1361 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1362 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1364 } else if (dim == 4) {
1365 for (k = 0; k < step; ++k, voffs += 2) {
1366 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1367 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1368 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1369 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1370 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1373 for (k = 0; k < step; ++k) {
1374 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1375 for (l = 0; l < dim; l += 2, voffs++) {
1376 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1377 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1379 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1380 pass, voffset / ch + (voffs % ch) * vlen,
1381 vec[voffset / ch + (voffs % ch) * vlen],
1382 codebook.codevectors[coffs + l], coffs, l);
1386 } else if (vr_type == 2) {
1389 for (k = 0; k < step; ++k) {
1390 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1391 for (l = 0; l < dim; ++l, ++voffs) {
1392 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1394 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1395 pass, voffset / ch + (voffs % ch) * vlen,
1396 vec[voffset / ch + (voffs % ch) * vlen],
1397 codebook.codevectors[coffs + l], coffs, l);
1403 j_times_ptns_to_read += ptns_to_read;
1406 voffset += vr->partition_size;
1413 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1415 uint8_t *do_not_decode,
1416 float *vec, unsigned vlen)
1419 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1420 else if (vr->type == 1)
1421 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1422 else if (vr->type == 0)
1423 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1425 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1430 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1433 for (i = 0; i < blocksize; i++) {
1436 ang[i] = mag[i] - ang[i];
1438 float temp = ang[i];
1446 float temp = ang[i];
1454 // Decode the audio packet using the functions above
1456 static int vorbis_parse_audio_packet(vorbis_context *vc)
1458 GetBitContext *gb = &vc->gb;
1460 unsigned previous_window = vc->previous_window;
1461 unsigned mode_number, blockflag, blocksize;
1463 uint8_t no_residue[255];
1464 uint8_t do_not_decode[255];
1465 vorbis_mapping *mapping;
1466 float *ch_res_ptr = vc->channel_residues;
1467 float *ch_floor_ptr = vc->channel_floors;
1468 uint8_t res_chan[255];
1469 unsigned res_num = 0;
1472 if (get_bits1(gb)) {
1473 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1474 return -1; // packet type not audio
1477 if (vc->mode_count == 1) {
1480 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1482 vc->mode_number = mode_number;
1483 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1485 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1486 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1488 blockflag = vc->modes[mode_number].blockflag;
1489 blocksize = vc->blocksize[blockflag];
1491 skip_bits(gb, 2); // previous_window, next_window
1493 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1494 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1498 for (i = 0; i < vc->audio_channels; ++i) {
1499 vorbis_floor *floor;
1501 if (mapping->submaps > 1) {
1502 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1504 floor = &vc->floors[mapping->submap_floor[0]];
1507 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1510 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1513 no_residue[i] = ret;
1514 ch_floor_ptr += blocksize / 2;
1517 // Nonzero vector propagate
1519 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1520 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1521 no_residue[mapping->magnitude[i]] = 0;
1522 no_residue[mapping->angle[i]] = 0;
1528 for (i = 0; i < mapping->submaps; ++i) {
1529 vorbis_residue *residue;
1532 for (j = 0; j < vc->audio_channels; ++j) {
1533 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1534 res_chan[j] = res_num;
1535 if (no_residue[j]) {
1536 do_not_decode[ch] = 1;
1538 do_not_decode[ch] = 0;
1544 residue = &vc->residues[mapping->submap_residue[i]];
1545 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1547 ch_res_ptr += ch * blocksize / 2;
1552 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1555 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1556 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1557 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1562 mdct = &vc->mdct[blockflag];
1564 for (j = vc->audio_channels-1;j >= 0; j--) {
1565 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1566 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1567 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1568 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1571 // Overlap/add, save data for next overlapping FPMATH
1573 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1574 for (j = 0; j < vc->audio_channels; j++) {
1575 unsigned bs0 = vc->blocksize[0];
1576 unsigned bs1 = vc->blocksize[1];
1577 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1578 float *saved = vc->saved + j * bs1 / 4;
1579 float *ret = vc->channel_floors + j * retlen;
1580 float *buf = residue;
1581 const float *win = vc->win[blockflag & previous_window];
1583 if (blockflag == previous_window) {
1584 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1585 } else if (blockflag > previous_window) {
1586 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1587 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1589 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1590 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1592 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1595 vc->previous_window = blockflag;
1599 // Return the decoded audio packet through the standard api
1601 static int vorbis_decode_frame(AVCodecContext *avccontext,
1602 void *data, int *data_size,
1605 const uint8_t *buf = avpkt->data;
1606 int buf_size = avpkt->size;
1607 vorbis_context *vc = avccontext->priv_data ;
1608 GetBitContext *gb = &(vc->gb);
1609 const float *channel_ptrs[255];
1615 av_dlog(NULL, "packet length %d \n", buf_size);
1617 init_get_bits(gb, buf, buf_size*8);
1619 len = vorbis_parse_audio_packet(vc);
1626 if (!vc->first_frame) {
1627 vc->first_frame = 1;
1632 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1633 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1635 if (vc->audio_channels > 8) {
1636 for (i = 0; i < vc->audio_channels; i++)
1637 channel_ptrs[i] = vc->channel_floors + i * len;
1639 for (i = 0; i < vc->audio_channels; i++)
1640 channel_ptrs[i] = vc->channel_floors +
1641 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1644 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
1645 vc->fmt_conv.float_interleave(data, channel_ptrs, len, vc->audio_channels);
1647 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1648 vc->audio_channels);
1650 *data_size = len * vc->audio_channels *
1651 av_get_bytes_per_sample(avccontext->sample_fmt);
1658 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1660 vorbis_context *vc = avccontext->priv_data;
1667 AVCodec ff_vorbis_decoder = {
1669 .type = AVMEDIA_TYPE_AUDIO,
1670 .id = CODEC_ID_VORBIS,
1671 .priv_data_size = sizeof(vorbis_context),
1672 .init = vorbis_decode_init,
1673 .close = vorbis_decode_close,
1674 .decode = vorbis_decode_frame,
1675 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1676 .channel_layouts = ff_vorbis_channel_layouts,
1677 .sample_fmts = (const enum AVSampleFormat[]) {
1678 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE