4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
39 #include "fmtconvert.h"
47 #define V_MAX_VLCS (1 << 16)
48 #define V_MAX_PARTITIONS (1 << 20)
59 typedef union vorbis_floor_u vorbis_floor_data;
60 typedef struct vorbis_floor0_s vorbis_floor0;
61 typedef struct vorbis_floor1_s vorbis_floor1;
62 struct vorbis_context_s;
64 int (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
73 uint16_t bark_map_size;
76 uint8_t amplitude_bits;
77 uint8_t amplitude_offset;
82 struct vorbis_floor1_s {
84 uint8_t partition_class[32];
85 uint8_t class_dimensions[16];
86 uint8_t class_subclasses[16];
87 uint8_t class_masterbook[16];
88 int16_t subclass_books[16][8];
91 vorbis_floor1_entry *list;
100 unsigned partition_size;
101 uint8_t classifications;
103 int16_t books[64][8];
105 uint16_t ptns_to_read;
111 uint16_t coupling_steps;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
122 uint16_t transformtype;
126 typedef struct vorbis_context_s {
127 AVCodecContext *avccontext;
131 AVFloatDSPContext fdsp;
132 FmtConvertContext fmt_conv;
137 uint8_t audio_channels;
138 uint32_t audio_samplerate;
139 uint32_t bitrate_maximum;
140 uint32_t bitrate_nominal;
141 uint32_t bitrate_minimum;
142 uint32_t blocksize[2];
144 uint16_t codebook_count;
145 vorbis_codebook *codebooks;
147 vorbis_floor *floors;
148 uint8_t residue_count;
149 vorbis_residue *residues;
150 uint8_t mapping_count;
151 vorbis_mapping *mappings;
154 uint8_t mode_number; // mode number for the current packet
155 uint8_t previous_window;
156 float *channel_residues;
160 /* Helper functions */
163 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
165 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
166 #define VALIDATE_INDEX(idx, limit) \
168 av_log(vc->avccontext, AV_LOG_ERROR,\
170 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
171 return AVERROR_INVALIDDATA;\
173 #define GET_VALIDATED_INDEX(idx, bits, limit) \
175 idx = get_bits(gb, bits);\
176 VALIDATE_INDEX(idx, limit)\
179 static float vorbisfloat2float(unsigned val)
181 double mant = val & 0x1fffff;
182 long exp = (val & 0x7fe00000L) >> 21;
183 if (val & 0x80000000)
185 return ldexp(mant, exp - 20 - 768);
189 // Free all allocated memory -----------------------------------------
191 static void vorbis_free(vorbis_context *vc)
195 av_freep(&vc->channel_residues);
196 av_freep(&vc->saved);
198 for (i = 0; i < vc->residue_count; i++)
199 av_free(vc->residues[i].classifs);
200 av_freep(&vc->residues);
201 av_freep(&vc->modes);
203 ff_mdct_end(&vc->mdct[0]);
204 ff_mdct_end(&vc->mdct[1]);
206 for (i = 0; i < vc->codebook_count; ++i) {
207 av_free(vc->codebooks[i].codevectors);
208 ff_free_vlc(&vc->codebooks[i].vlc);
210 av_freep(&vc->codebooks);
212 for (i = 0; i < vc->floor_count; ++i) {
213 if (vc->floors[i].floor_type == 0) {
214 av_free(vc->floors[i].data.t0.map[0]);
215 av_free(vc->floors[i].data.t0.map[1]);
216 av_free(vc->floors[i].data.t0.book_list);
217 av_free(vc->floors[i].data.t0.lsp);
219 av_free(vc->floors[i].data.t1.list);
222 av_freep(&vc->floors);
224 for (i = 0; i < vc->mapping_count; ++i) {
225 av_free(vc->mappings[i].magnitude);
226 av_free(vc->mappings[i].angle);
227 av_free(vc->mappings[i].mux);
229 av_freep(&vc->mappings);
232 // Parse setup header -------------------------------------------------
234 // Process codebooks part
236 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
239 uint8_t *tmp_vlc_bits;
240 uint32_t *tmp_vlc_codes;
241 GetBitContext *gb = &vc->gb;
242 uint16_t *codebook_multiplicands;
245 vc->codebook_count = get_bits(gb, 8) + 1;
247 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
249 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
250 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
251 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
252 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
254 for (cb = 0; cb < vc->codebook_count; ++cb) {
255 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
256 unsigned ordered, t, entries, used_entries = 0;
258 av_dlog(NULL, " %u. Codebook\n", cb);
260 if (get_bits(gb, 24) != 0x564342) {
261 av_log(vc->avccontext, AV_LOG_ERROR,
262 " %u. Codebook setup data corrupt.\n", cb);
263 ret = AVERROR_INVALIDDATA;
267 codebook_setup->dimensions=get_bits(gb, 16);
268 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
269 av_log(vc->avccontext, AV_LOG_ERROR,
270 " %u. Codebook's dimension is invalid (%d).\n",
271 cb, codebook_setup->dimensions);
272 ret = AVERROR_INVALIDDATA;
275 entries = get_bits(gb, 24);
276 if (entries > V_MAX_VLCS) {
277 av_log(vc->avccontext, AV_LOG_ERROR,
278 " %u. Codebook has too many entries (%u).\n",
280 ret = AVERROR_INVALIDDATA;
284 ordered = get_bits1(gb);
286 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
287 codebook_setup->dimensions, entries);
291 unsigned sparse = get_bits1(gb);
293 av_dlog(NULL, " not ordered \n");
296 av_dlog(NULL, " sparse \n");
299 for (ce = 0; ce < entries; ++ce) {
300 flag = get_bits1(gb);
302 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
305 tmp_vlc_bits[ce] = 0;
308 av_dlog(NULL, " not sparse \n");
310 used_entries = entries;
311 for (ce = 0; ce < entries; ++ce)
312 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
315 unsigned current_entry = 0;
316 unsigned current_length = get_bits(gb, 5) + 1;
318 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
320 used_entries = entries;
321 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
324 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
326 number = get_bits(gb, ilog(entries - current_entry));
328 av_dlog(NULL, " number: %u\n", number);
330 for (i = current_entry; i < number+current_entry; ++i)
331 if (i < used_entries)
332 tmp_vlc_bits[i] = current_length;
334 current_entry+=number;
336 if (current_entry>used_entries) {
337 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
338 ret = AVERROR_INVALIDDATA;
343 codebook_setup->lookup_type = get_bits(gb, 4);
345 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
346 codebook_setup->lookup_type ? "vq" : "no lookup");
348 // If the codebook is used for (inverse) VQ, calculate codevectors.
350 if (codebook_setup->lookup_type == 1) {
352 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
354 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
355 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
356 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
357 unsigned codebook_sequence_p = get_bits1(gb);
359 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
360 codebook_lookup_values);
361 av_dlog(NULL, " delta %f minmum %f \n",
362 codebook_delta_value, codebook_minimum_value);
364 for (i = 0; i < codebook_lookup_values; ++i) {
365 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
367 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
368 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
369 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
372 // Weed out unused vlcs and build codevector vector
373 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
374 codebook_setup->dimensions *
375 sizeof(*codebook_setup->codevectors))
377 for (j = 0, i = 0; i < entries; ++i) {
378 unsigned dim = codebook_setup->dimensions;
380 if (tmp_vlc_bits[i]) {
382 unsigned lookup_offset = i;
384 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
386 for (k = 0; k < dim; ++k) {
387 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
388 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
389 if (codebook_sequence_p)
390 last = codebook_setup->codevectors[j * dim + k];
391 lookup_offset/=codebook_lookup_values;
393 tmp_vlc_bits[j] = tmp_vlc_bits[i];
395 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
396 for (k = 0; k < dim; ++k)
397 av_dlog(vc->avccontext, " %f ",
398 codebook_setup->codevectors[j * dim + k]);
399 av_dlog(vc->avccontext, "\n");
404 if (j != used_entries) {
405 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
406 ret = AVERROR_INVALIDDATA;
409 entries = used_entries;
410 } else if (codebook_setup->lookup_type >= 2) {
411 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
412 ret = AVERROR_INVALIDDATA;
416 // Initialize VLC table
417 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
418 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
419 ret = AVERROR_INVALIDDATA;
422 codebook_setup->maxdepth = 0;
423 for (t = 0; t < entries; ++t)
424 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
425 codebook_setup->maxdepth = tmp_vlc_bits[t];
427 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
428 codebook_setup->nb_bits = V_NB_BITS2;
430 codebook_setup->nb_bits = V_NB_BITS;
432 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
434 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
435 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
436 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
437 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
439 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
444 av_free(tmp_vlc_bits);
445 av_free(tmp_vlc_codes);
446 av_free(codebook_multiplicands);
451 av_free(tmp_vlc_bits);
452 av_free(tmp_vlc_codes);
453 av_free(codebook_multiplicands);
457 // Process time domain transforms part (unused in Vorbis I)
459 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
461 GetBitContext *gb = &vc->gb;
462 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
464 for (i = 0; i < vorbis_time_count; ++i) {
465 unsigned vorbis_tdtransform = get_bits(gb, 16);
467 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
468 vorbis_time_count, vorbis_tdtransform);
470 if (vorbis_tdtransform) {
471 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
472 return AVERROR_INVALIDDATA;
478 // Process floors part
480 static int vorbis_floor0_decode(vorbis_context *vc,
481 vorbis_floor_data *vfu, float *vec);
482 static void create_map(vorbis_context *vc, unsigned floor_number);
483 static int vorbis_floor1_decode(vorbis_context *vc,
484 vorbis_floor_data *vfu, float *vec);
485 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
487 GetBitContext *gb = &vc->gb;
490 vc->floor_count = get_bits(gb, 6) + 1;
492 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
494 for (i = 0; i < vc->floor_count; ++i) {
495 vorbis_floor *floor_setup = &vc->floors[i];
497 floor_setup->floor_type = get_bits(gb, 16);
499 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
501 if (floor_setup->floor_type == 1) {
502 int maximum_class = -1;
503 unsigned rangebits, rangemax, floor1_values = 2;
505 floor_setup->decode = vorbis_floor1_decode;
507 floor_setup->data.t1.partitions = get_bits(gb, 5);
509 av_dlog(NULL, " %d.floor: %d partitions \n",
510 i, floor_setup->data.t1.partitions);
512 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
513 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
514 if (floor_setup->data.t1.partition_class[j] > maximum_class)
515 maximum_class = floor_setup->data.t1.partition_class[j];
517 av_dlog(NULL, " %d. floor %d partition class %d \n",
518 i, j, floor_setup->data.t1.partition_class[j]);
522 av_dlog(NULL, " maximum class %d \n", maximum_class);
524 for (j = 0; j <= maximum_class; ++j) {
525 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
526 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
528 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
529 floor_setup->data.t1.class_dimensions[j],
530 floor_setup->data.t1.class_subclasses[j]);
532 if (floor_setup->data.t1.class_subclasses[j]) {
533 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
535 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
538 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
539 int16_t bits = get_bits(gb, 8) - 1;
541 VALIDATE_INDEX(bits, vc->codebook_count)
542 floor_setup->data.t1.subclass_books[j][k] = bits;
544 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
548 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
549 floor_setup->data.t1.x_list_dim = 2;
551 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
552 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
554 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
555 sizeof(*floor_setup->data.t1.list));
558 rangebits = get_bits(gb, 4);
559 rangemax = (1 << rangebits);
560 if (rangemax > vc->blocksize[1] / 2) {
561 av_log(vc->avccontext, AV_LOG_ERROR,
562 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
563 rangemax, vc->blocksize[1] / 2);
564 return AVERROR_INVALIDDATA;
566 floor_setup->data.t1.list[0].x = 0;
567 floor_setup->data.t1.list[1].x = rangemax;
569 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
570 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
571 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
573 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
574 floor_setup->data.t1.list[floor1_values].x);
578 // Precalculate order of x coordinates - needed for decode
579 if (ff_vorbis_ready_floor1_list(vc->avccontext,
580 floor_setup->data.t1.list,
581 floor_setup->data.t1.x_list_dim)) {
582 return AVERROR_INVALIDDATA;
584 } else if (floor_setup->floor_type == 0) {
585 unsigned max_codebook_dim = 0;
587 floor_setup->decode = vorbis_floor0_decode;
589 floor_setup->data.t0.order = get_bits(gb, 8);
590 floor_setup->data.t0.rate = get_bits(gb, 16);
591 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
592 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
593 /* zero would result in a div by zero later *
595 if (floor_setup->data.t0.amplitude_bits == 0) {
596 av_log(vc->avccontext, AV_LOG_ERROR,
597 "Floor 0 amplitude bits is 0.\n");
598 return AVERROR_INVALIDDATA;
600 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
601 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
603 /* allocate mem for booklist */
604 floor_setup->data.t0.book_list =
605 av_malloc(floor_setup->data.t0.num_books);
606 if (!floor_setup->data.t0.book_list)
607 return AVERROR(ENOMEM);
608 /* read book indexes */
612 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
613 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
614 floor_setup->data.t0.book_list[idx] = book_idx;
615 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
616 max_codebook_dim = vc->codebooks[book_idx].dimensions;
622 /* codebook dim is for padding if codebook dim doesn't *
623 * divide order+1 then we need to read more data */
624 floor_setup->data.t0.lsp =
625 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
626 * sizeof(*floor_setup->data.t0.lsp));
627 if (!floor_setup->data.t0.lsp)
628 return AVERROR(ENOMEM);
630 /* debug output parsed headers */
631 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
632 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
633 av_dlog(NULL, "floor0 bark map size: %u\n",
634 floor_setup->data.t0.bark_map_size);
635 av_dlog(NULL, "floor0 amplitude bits: %u\n",
636 floor_setup->data.t0.amplitude_bits);
637 av_dlog(NULL, "floor0 amplitude offset: %u\n",
638 floor_setup->data.t0.amplitude_offset);
639 av_dlog(NULL, "floor0 number of books: %u\n",
640 floor_setup->data.t0.num_books);
641 av_dlog(NULL, "floor0 book list pointer: %p\n",
642 floor_setup->data.t0.book_list);
645 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
646 av_dlog(NULL, " Book %d: %u\n", idx + 1,
647 floor_setup->data.t0.book_list[idx]);
651 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
652 return AVERROR_INVALIDDATA;
658 // Process residues part
660 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
662 GetBitContext *gb = &vc->gb;
665 vc->residue_count = get_bits(gb, 6)+1;
666 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
668 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
670 for (i = 0; i < vc->residue_count; ++i) {
671 vorbis_residue *res_setup = &vc->residues[i];
673 unsigned high_bits, low_bits;
675 res_setup->type = get_bits(gb, 16);
677 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
679 res_setup->begin = get_bits(gb, 24);
680 res_setup->end = get_bits(gb, 24);
681 res_setup->partition_size = get_bits(gb, 24) + 1;
682 /* Validations to prevent a buffer overflow later. */
683 if (res_setup->begin>res_setup->end ||
684 res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
685 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
686 av_log(vc->avccontext, AV_LOG_ERROR,
687 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
688 res_setup->type, res_setup->begin, res_setup->end,
689 res_setup->partition_size, vc->blocksize[1] / 2);
690 return AVERROR_INVALIDDATA;
693 res_setup->classifications = get_bits(gb, 6) + 1;
694 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
696 res_setup->ptns_to_read =
697 (res_setup->end - res_setup->begin) / res_setup->partition_size;
698 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
700 sizeof(*res_setup->classifs));
701 if (!res_setup->classifs)
702 return AVERROR(ENOMEM);
704 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
705 res_setup->begin, res_setup->end, res_setup->partition_size,
706 res_setup->classifications, res_setup->classbook);
708 for (j = 0; j < res_setup->classifications; ++j) {
710 low_bits = get_bits(gb, 3);
712 high_bits = get_bits(gb, 5);
713 cascade[j] = (high_bits << 3) + low_bits;
715 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
718 res_setup->maxpass = 0;
719 for (j = 0; j < res_setup->classifications; ++j) {
720 for (k = 0; k < 8; ++k) {
721 if (cascade[j]&(1 << k)) {
722 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
724 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
725 j, k, res_setup->books[j][k]);
727 if (k>res_setup->maxpass)
728 res_setup->maxpass = k;
730 res_setup->books[j][k] = -1;
738 // Process mappings part
740 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
742 GetBitContext *gb = &vc->gb;
745 vc->mapping_count = get_bits(gb, 6)+1;
746 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
748 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
750 for (i = 0; i < vc->mapping_count; ++i) {
751 vorbis_mapping *mapping_setup = &vc->mappings[i];
753 if (get_bits(gb, 16)) {
754 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
755 return AVERROR_INVALIDDATA;
758 mapping_setup->submaps = get_bits(gb, 4) + 1;
760 mapping_setup->submaps = 1;
764 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
765 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
766 sizeof(*mapping_setup->magnitude));
767 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
768 sizeof(*mapping_setup->angle));
769 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
770 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
771 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
774 mapping_setup->coupling_steps = 0;
777 av_dlog(NULL, " %u mapping coupling steps: %d\n",
778 i, mapping_setup->coupling_steps);
780 if (get_bits(gb, 2)) {
781 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
782 return AVERROR_INVALIDDATA; // following spec.
785 if (mapping_setup->submaps>1) {
786 mapping_setup->mux = av_mallocz(vc->audio_channels *
787 sizeof(*mapping_setup->mux));
788 for (j = 0; j < vc->audio_channels; ++j)
789 mapping_setup->mux[j] = get_bits(gb, 4);
792 for (j = 0; j < mapping_setup->submaps; ++j) {
793 skip_bits(gb, 8); // FIXME check?
794 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
795 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
797 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
798 mapping_setup->submap_floor[j],
799 mapping_setup->submap_residue[j]);
805 // Process modes part
807 static void create_map(vorbis_context *vc, unsigned floor_number)
809 vorbis_floor *floors = vc->floors;
815 for (blockflag = 0; blockflag < 2; ++blockflag) {
816 n = vc->blocksize[blockflag] / 2;
817 floors[floor_number].data.t0.map[blockflag] =
818 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
820 map = floors[floor_number].data.t0.map[blockflag];
821 vf = &floors[floor_number].data.t0;
823 for (idx = 0; idx < n; ++idx) {
824 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
825 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
826 if (vf->bark_map_size-1 < map[idx])
827 map[idx] = vf->bark_map_size - 1;
830 vf->map_size[blockflag] = n;
833 for (idx = 0; idx <= n; ++idx) {
834 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
838 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
840 GetBitContext *gb = &vc->gb;
843 vc->mode_count = get_bits(gb, 6) + 1;
844 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
846 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
848 for (i = 0; i < vc->mode_count; ++i) {
849 vorbis_mode *mode_setup = &vc->modes[i];
851 mode_setup->blockflag = get_bits1(gb);
852 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
853 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
854 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
856 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
857 i, mode_setup->blockflag, mode_setup->windowtype,
858 mode_setup->transformtype, mode_setup->mapping);
863 // Process the whole setup header using the functions above
865 static int vorbis_parse_setup_hdr(vorbis_context *vc)
867 GetBitContext *gb = &vc->gb;
870 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
871 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
872 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
873 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
874 return AVERROR_INVALIDDATA;
877 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
878 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
881 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
882 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
885 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
886 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
889 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
890 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
893 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
894 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
897 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
898 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
901 if (!get_bits1(gb)) {
902 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
903 return AVERROR_INVALIDDATA; // framing flag bit unset error
909 // Process the identification header
911 static int vorbis_parse_id_hdr(vorbis_context *vc)
913 GetBitContext *gb = &vc->gb;
916 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
917 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
918 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
919 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
920 return AVERROR_INVALIDDATA;
923 vc->version = get_bits_long(gb, 32); //FIXME check 0
924 vc->audio_channels = get_bits(gb, 8);
925 if (vc->audio_channels <= 0) {
926 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
927 return AVERROR_INVALIDDATA;
929 vc->audio_samplerate = get_bits_long(gb, 32);
930 if (vc->audio_samplerate <= 0) {
931 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
932 return AVERROR_INVALIDDATA;
934 vc->bitrate_maximum = get_bits_long(gb, 32);
935 vc->bitrate_nominal = get_bits_long(gb, 32);
936 vc->bitrate_minimum = get_bits_long(gb, 32);
937 bl0 = get_bits(gb, 4);
938 bl1 = get_bits(gb, 4);
939 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
940 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
941 return AVERROR_INVALIDDATA;
943 vc->blocksize[0] = (1 << bl0);
944 vc->blocksize[1] = (1 << bl1);
945 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
946 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
948 if ((get_bits1(gb)) == 0) {
949 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
950 return AVERROR_INVALIDDATA;
953 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
954 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
955 vc->previous_window = 0;
957 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
958 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
960 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 ",
961 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
964 BLK = vc->blocksize[0];
965 for (i = 0; i < BLK / 2; ++i) {
966 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)));
973 // Process the extradata using the functions above (identification header, setup header)
975 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
977 vorbis_context *vc = avccontext->priv_data;
978 uint8_t *headers = avccontext->extradata;
979 int headers_len = avccontext->extradata_size;
980 uint8_t *header_start[3];
982 GetBitContext *gb = &vc->gb;
985 vc->avccontext = avccontext;
986 ff_dsputil_init(&vc->dsp, avccontext);
987 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
988 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
990 avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
993 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
994 return AVERROR_INVALIDDATA;
997 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
998 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1002 init_get_bits(gb, header_start[0], header_len[0]*8);
1003 hdr_type = get_bits(gb, 8);
1004 if (hdr_type != 1) {
1005 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1006 return AVERROR_INVALIDDATA;
1008 if ((ret = vorbis_parse_id_hdr(vc))) {
1009 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1014 init_get_bits(gb, header_start[2], header_len[2]*8);
1015 hdr_type = get_bits(gb, 8);
1016 if (hdr_type != 5) {
1017 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1019 return AVERROR_INVALIDDATA;
1021 if ((ret = vorbis_parse_setup_hdr(vc))) {
1022 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1027 if (vc->audio_channels > 8)
1028 avccontext->channel_layout = 0;
1030 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1032 avccontext->channels = vc->audio_channels;
1033 avccontext->sample_rate = vc->audio_samplerate;
1035 avcodec_get_frame_defaults(&vc->frame);
1036 avccontext->coded_frame = &vc->frame;
1041 // Decode audiopackets -------------------------------------------------
1043 // Read and decode floor
1045 static int vorbis_floor0_decode(vorbis_context *vc,
1046 vorbis_floor_data *vfu, float *vec)
1048 vorbis_floor0 *vf = &vfu->t0;
1049 float *lsp = vf->lsp;
1050 unsigned amplitude, book_idx;
1051 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1053 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1054 if (amplitude > 0) {
1056 unsigned idx, lsp_len = 0;
1057 vorbis_codebook codebook;
1059 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1060 if (book_idx >= vf->num_books) {
1061 av_log(vc->avccontext, AV_LOG_ERROR,
1062 "floor0 dec: booknumber too high!\n");
1065 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1066 codebook = vc->codebooks[vf->book_list[book_idx]];
1067 /* Invalid codebook! */
1068 if (!codebook.codevectors)
1069 return AVERROR_INVALIDDATA;
1071 while (lsp_len<vf->order) {
1074 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1075 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1076 /* read temp vector */
1077 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1078 codebook.nb_bits, codebook.maxdepth)
1079 * codebook.dimensions;
1080 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1081 /* copy each vector component and add last to it */
1082 for (idx = 0; idx < codebook.dimensions; ++idx)
1083 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1084 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1086 lsp_len += codebook.dimensions;
1088 /* DEBUG: output lsp coeffs */
1091 for (idx = 0; idx < lsp_len; ++idx)
1092 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1095 /* synthesize floor output vector */
1098 int order = vf->order;
1099 float wstep = M_PI / vf->bark_map_size;
1101 for (i = 0; i < order; i++)
1102 lsp[i] = 2.0f * cos(lsp[i]);
1104 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1105 vf->map_size[blockflag], order, wstep);
1108 while (i < vf->map_size[blockflag]) {
1109 int j, iter_cond = vf->map[blockflag][i];
1112 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1114 /* similar part for the q and p products */
1115 for (j = 0; j + 1 < order; j += 2) {
1116 q *= lsp[j] - two_cos_w;
1117 p *= lsp[j + 1] - two_cos_w;
1119 if (j == order) { // even order
1120 p *= p * (2.0f - two_cos_w);
1121 q *= q * (2.0f + two_cos_w);
1122 } else { // odd order
1123 q *= two_cos_w-lsp[j]; // one more time for q
1125 /* final step and square */
1126 p *= p * (4.f - two_cos_w * two_cos_w);
1130 /* calculate linear floor value */
1131 q = exp((((amplitude*vf->amplitude_offset) /
1132 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1133 - vf->amplitude_offset) * .11512925f);
1138 } while (vf->map[blockflag][i] == iter_cond);
1142 /* this channel is unused */
1146 av_dlog(NULL, " Floor0 decoded\n");
1151 static int vorbis_floor1_decode(vorbis_context *vc,
1152 vorbis_floor_data *vfu, float *vec)
1154 vorbis_floor1 *vf = &vfu->t1;
1155 GetBitContext *gb = &vc->gb;
1156 uint16_t range_v[4] = { 256, 128, 86, 64 };
1157 unsigned range = range_v[vf->multiplier - 1];
1158 uint16_t floor1_Y[258];
1159 uint16_t floor1_Y_final[258];
1160 int floor1_flag[258];
1161 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1162 int book, adx, ady, dy, off, predicted, err;
1165 if (!get_bits1(gb)) // silence
1168 // Read values (or differences) for the floor's points
1170 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1171 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1173 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1176 for (i = 0; i < vf->partitions; ++i) {
1177 partition_class = vf->partition_class[i];
1178 cdim = vf->class_dimensions[partition_class];
1179 cbits = vf->class_subclasses[partition_class];
1180 csub = (1 << cbits) - 1;
1183 av_dlog(NULL, "Cbits %u\n", cbits);
1185 if (cbits) // this reads all subclasses for this partition's class
1186 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1187 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1189 for (j = 0; j < cdim; ++j) {
1190 book = vf->subclass_books[partition_class][cval & csub];
1192 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1193 book, cbits, cval, get_bits_count(gb));
1195 cval = cval >> cbits;
1197 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1198 vc->codebooks[book].nb_bits, 3);
1200 floor1_Y[offset+j] = 0;
1203 av_dlog(NULL, " floor(%d) = %d \n",
1204 vf->list[offset+j].x, floor1_Y[offset+j]);
1209 // Amplitude calculation from the differences
1213 floor1_Y_final[0] = floor1_Y[0];
1214 floor1_Y_final[1] = floor1_Y[1];
1216 for (i = 2; i < vf->x_list_dim; ++i) {
1217 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1219 low_neigh_offs = vf->list[i].low;
1220 high_neigh_offs = vf->list[i].high;
1221 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1222 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1224 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1227 predicted = floor1_Y_final[low_neigh_offs] - off;
1229 predicted = floor1_Y_final[low_neigh_offs] + off;
1230 } // render_point end
1233 highroom = range-predicted;
1234 lowroom = predicted;
1235 if (highroom < lowroom) {
1236 room = highroom * 2;
1238 room = lowroom * 2; // SPEC mispelling
1241 floor1_flag[low_neigh_offs] = 1;
1242 floor1_flag[high_neigh_offs] = 1;
1245 if (highroom > lowroom) {
1246 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1248 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1252 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1254 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1259 floor1_Y_final[i] = av_clip_uint16(predicted);
1262 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1263 vf->list[i].x, floor1_Y_final[i], val);
1266 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1268 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1270 av_dlog(NULL, " Floor decoded\n");
1275 // Read and decode residue
1277 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1280 uint8_t *do_not_decode,
1286 GetBitContext *gb = &vc->gb;
1287 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1288 unsigned ptns_to_read = vr->ptns_to_read;
1289 uint8_t *classifs = vr->classifs;
1290 unsigned pass, ch_used, i, j, k, l;
1291 unsigned max_output = (ch - 1) * vlen;
1294 for (j = 1; j < ch; ++j)
1295 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1296 if (do_not_decode[0])
1299 max_output += vr->end / ch;
1302 max_output += vr->end;
1305 if (max_output > ch_left * vlen) {
1306 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1310 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1312 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1313 uint16_t voffset, partition_count, j_times_ptns_to_read;
1315 voffset = vr->begin;
1316 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1318 unsigned inverse_class = ff_inverse[vr->classifications];
1319 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1320 if (!do_not_decode[j]) {
1321 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1322 vc->codebooks[vr->classbook].nb_bits, 3);
1324 av_dlog(NULL, "Classword: %u\n", temp);
1326 av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1327 for (i = 0; i < c_p_c; ++i) {
1330 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1331 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1332 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1336 j_times_ptns_to_read += ptns_to_read;
1339 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1340 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1343 if (!do_not_decode[j]) {
1344 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1345 int vqbook = vr->books[vqclass][pass];
1347 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1349 unsigned dim = vc->codebooks[vqbook].dimensions;
1350 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1351 vorbis_codebook codebook = vc->codebooks[vqbook];
1355 voffs = voffset+j*vlen;
1356 for (k = 0; k < step; ++k) {
1357 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1358 for (l = 0; l < dim; ++l)
1359 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1361 } else if (vr_type == 1) {
1362 voffs = voffset + j * vlen;
1363 for (k = 0; k < step; ++k) {
1364 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1365 for (l = 0; l < dim; ++l, ++voffs) {
1366 vec[voffs]+=codebook.codevectors[coffs+l];
1368 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1369 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1372 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1373 voffs = voffset >> 1;
1376 for (k = 0; k < step; ++k) {
1377 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1378 vec[voffs + k ] += codebook.codevectors[coffs ];
1379 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1381 } else if (dim == 4) {
1382 for (k = 0; k < step; ++k, voffs += 2) {
1383 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1384 vec[voffs ] += codebook.codevectors[coffs ];
1385 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1386 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1387 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1390 for (k = 0; k < step; ++k) {
1391 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1392 for (l = 0; l < dim; l += 2, voffs++) {
1393 vec[voffs ] += codebook.codevectors[coffs + l ];
1394 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1396 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1397 pass, voffset / ch + (voffs % ch) * vlen,
1398 vec[voffset / ch + (voffs % ch) * vlen],
1399 codebook.codevectors[coffs + l], coffs, l);
1403 } else if (vr_type == 2) {
1404 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1405 unsigned voffs_mod = voffset - voffs_div * ch;
1407 for (k = 0; k < step; ++k) {
1408 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1409 for (l = 0; l < dim; ++l) {
1410 vec[voffs_div + voffs_mod * vlen] +=
1411 codebook.codevectors[coffs + l];
1413 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1414 pass, voffs_div + voffs_mod * vlen,
1415 vec[voffs_div + voffs_mod * vlen],
1416 codebook.codevectors[coffs + l], coffs, l);
1418 if (++voffs_mod == ch) {
1427 j_times_ptns_to_read += ptns_to_read;
1430 voffset += vr->partition_size;
1437 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1439 uint8_t *do_not_decode,
1440 float *vec, unsigned vlen,
1444 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1445 else if (vr->type == 1)
1446 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1447 else if (vr->type == 0)
1448 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1450 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1451 return AVERROR_INVALIDDATA;
1455 void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1458 for (i = 0; i < blocksize; i++) {
1461 ang[i] = mag[i] - ang[i];
1463 float temp = ang[i];
1471 float temp = ang[i];
1479 // Decode the audio packet using the functions above
1481 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1483 GetBitContext *gb = &vc->gb;
1485 unsigned previous_window = vc->previous_window;
1486 unsigned mode_number, blockflag, blocksize;
1488 uint8_t no_residue[255];
1489 uint8_t do_not_decode[255];
1490 vorbis_mapping *mapping;
1491 float *ch_res_ptr = vc->channel_residues;
1492 uint8_t res_chan[255];
1493 unsigned res_num = 0;
1495 unsigned ch_left = vc->audio_channels;
1498 if (get_bits1(gb)) {
1499 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1500 return AVERROR_INVALIDDATA; // packet type not audio
1503 if (vc->mode_count == 1) {
1506 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1508 vc->mode_number = mode_number;
1509 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1511 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1512 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1514 blockflag = vc->modes[mode_number].blockflag;
1515 blocksize = vc->blocksize[blockflag];
1516 vlen = blocksize / 2;
1518 previous_window = get_bits(gb, 1);
1519 skip_bits1(gb); // next_window
1522 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1523 for (i = 0; i < vc->audio_channels; ++i)
1524 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1528 for (i = 0; i < vc->audio_channels; ++i) {
1529 vorbis_floor *floor;
1531 if (mapping->submaps > 1) {
1532 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1534 floor = &vc->floors[mapping->submap_floor[0]];
1537 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1540 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1541 return AVERROR_INVALIDDATA;
1543 no_residue[i] = ret;
1546 // Nonzero vector propagate
1548 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1549 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1550 no_residue[mapping->magnitude[i]] = 0;
1551 no_residue[mapping->angle[i]] = 0;
1557 for (i = 0; i < mapping->submaps; ++i) {
1558 vorbis_residue *residue;
1562 for (j = 0; j < vc->audio_channels; ++j) {
1563 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1564 res_chan[j] = res_num;
1565 if (no_residue[j]) {
1566 do_not_decode[ch] = 1;
1568 do_not_decode[ch] = 0;
1574 residue = &vc->residues[mapping->submap_residue[i]];
1576 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1580 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1585 ch_res_ptr += ch * vlen;
1590 return AVERROR_INVALIDDATA;
1594 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1597 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1598 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1599 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1604 mdct = &vc->mdct[blockflag];
1606 for (j = vc->audio_channels-1;j >= 0; j--) {
1607 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1608 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1609 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1612 // Overlap/add, save data for next overlapping
1614 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1615 for (j = 0; j < vc->audio_channels; j++) {
1616 unsigned bs0 = vc->blocksize[0];
1617 unsigned bs1 = vc->blocksize[1];
1618 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1619 float *saved = vc->saved + j * bs1 / 4;
1620 float *ret = floor_ptr[j];
1621 float *buf = residue;
1622 const float *win = vc->win[blockflag & previous_window];
1624 if (blockflag == previous_window) {
1625 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1626 } else if (blockflag > previous_window) {
1627 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1628 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1630 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1631 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1633 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1636 vc->previous_window = blockflag;
1640 // Return the decoded audio packet through the standard api
1642 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1643 int *got_frame_ptr, AVPacket *avpkt)
1645 const uint8_t *buf = avpkt->data;
1646 int buf_size = avpkt->size;
1647 vorbis_context *vc = avccontext->priv_data;
1648 GetBitContext *gb = &vc->gb;
1649 float *channel_ptrs[255];
1652 av_dlog(NULL, "packet length %d \n", buf_size);
1654 /* get output buffer */
1655 vc->frame.nb_samples = vc->blocksize[1] / 2;
1656 if ((ret = ff_get_buffer(avccontext, &vc->frame)) < 0) {
1657 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1661 if (vc->audio_channels > 8) {
1662 for (i = 0; i < vc->audio_channels; i++)
1663 channel_ptrs[i] = (float *)vc->frame.extended_data[i];
1665 for (i = 0; i < vc->audio_channels; i++) {
1666 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1667 channel_ptrs[ch] = (float *)vc->frame.extended_data[i];
1671 init_get_bits(gb, buf, buf_size*8);
1673 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1676 if (!vc->first_frame) {
1677 vc->first_frame = 1;
1682 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1683 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1685 vc->frame.nb_samples = len;
1687 *(AVFrame *)data = vc->frame;
1694 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1696 vorbis_context *vc = avccontext->priv_data;
1703 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1705 vorbis_context *vc = avccontext->priv_data;
1708 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1709 sizeof(*vc->saved));
1711 vc->previous_window = 0;
1714 AVCodec ff_vorbis_decoder = {
1716 .type = AVMEDIA_TYPE_AUDIO,
1717 .id = AV_CODEC_ID_VORBIS,
1718 .priv_data_size = sizeof(vorbis_context),
1719 .init = vorbis_decode_init,
1720 .close = vorbis_decode_close,
1721 .decode = vorbis_decode_frame,
1722 .flush = vorbis_decode_flush,
1723 .capabilities = CODEC_CAP_DR1,
1724 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1725 .channel_layouts = ff_vorbis_channel_layouts,
1726 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1727 AV_SAMPLE_FMT_NONE },