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 BITSTREAM_READER_LE
29 #include "libavutil/float_dsp.h"
36 #include "vorbisdsp.h"
41 #define V_MAX_VLCS (1 << 16)
42 #define V_MAX_PARTITIONS (1 << 20)
44 typedef struct vorbis_codebook {
53 typedef union vorbis_floor_u vorbis_floor_data;
54 typedef struct vorbis_floor0_s vorbis_floor0;
55 typedef struct vorbis_floor1_s vorbis_floor1;
56 struct vorbis_context_s;
58 int (* vorbis_floor_decode_func)
59 (struct vorbis_context_s *, vorbis_floor_data *, float *);
60 typedef struct vorbis_floor {
62 vorbis_floor_decode_func decode;
63 union vorbis_floor_u {
64 struct vorbis_floor0_s {
67 uint16_t bark_map_size;
70 uint8_t amplitude_bits;
71 uint8_t amplitude_offset;
76 struct vorbis_floor1_s {
78 uint8_t partition_class[32];
79 uint8_t class_dimensions[16];
80 uint8_t class_subclasses[16];
81 uint8_t class_masterbook[16];
82 int16_t subclass_books[16][8];
85 vorbis_floor1_entry *list;
90 typedef struct vorbis_residue {
94 unsigned partition_size;
95 uint8_t classifications;
99 uint16_t ptns_to_read;
103 typedef struct vorbis_mapping {
105 uint16_t coupling_steps;
109 uint8_t submap_floor[16];
110 uint8_t submap_residue[16];
113 typedef struct vorbis_mode {
116 uint16_t transformtype;
120 typedef struct vorbis_context_s {
121 AVCodecContext *avctx;
123 VorbisDSPContext dsp;
124 AVFloatDSPContext fdsp;
129 uint8_t audio_channels;
130 uint32_t audio_samplerate;
131 uint32_t bitrate_maximum;
132 uint32_t bitrate_nominal;
133 uint32_t bitrate_minimum;
134 uint32_t blocksize[2];
136 uint16_t codebook_count;
137 vorbis_codebook *codebooks;
139 vorbis_floor *floors;
140 uint8_t residue_count;
141 vorbis_residue *residues;
142 uint8_t mapping_count;
143 vorbis_mapping *mappings;
146 uint8_t mode_number; // mode number for the current packet
147 uint8_t previous_window;
148 float *channel_residues;
152 /* Helper functions */
155 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
157 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
158 #define VALIDATE_INDEX(idx, limit) \
160 av_log(vc->avctx, AV_LOG_ERROR,\
162 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
163 return AVERROR_INVALIDDATA;\
165 #define GET_VALIDATED_INDEX(idx, bits, limit) \
167 idx = get_bits(gb, bits);\
168 VALIDATE_INDEX(idx, limit)\
171 static float vorbisfloat2float(unsigned val)
173 double mant = val & 0x1fffff;
174 long exp = (val & 0x7fe00000L) >> 21;
175 if (val & 0x80000000)
177 return ldexp(mant, exp - 20 - 768);
181 // Free all allocated memory -----------------------------------------
183 static void vorbis_free(vorbis_context *vc)
187 av_freep(&vc->channel_residues);
188 av_freep(&vc->saved);
190 for (i = 0; i < vc->residue_count; i++)
191 av_free(vc->residues[i].classifs);
192 av_freep(&vc->residues);
193 av_freep(&vc->modes);
195 ff_mdct_end(&vc->mdct[0]);
196 ff_mdct_end(&vc->mdct[1]);
198 for (i = 0; i < vc->codebook_count; ++i) {
199 av_free(vc->codebooks[i].codevectors);
200 ff_free_vlc(&vc->codebooks[i].vlc);
202 av_freep(&vc->codebooks);
204 for (i = 0; i < vc->floor_count; ++i) {
205 if (vc->floors[i].floor_type == 0) {
206 av_free(vc->floors[i].data.t0.map[0]);
207 av_free(vc->floors[i].data.t0.map[1]);
208 av_free(vc->floors[i].data.t0.book_list);
209 av_free(vc->floors[i].data.t0.lsp);
211 av_free(vc->floors[i].data.t1.list);
214 av_freep(&vc->floors);
216 for (i = 0; i < vc->mapping_count; ++i) {
217 av_free(vc->mappings[i].magnitude);
218 av_free(vc->mappings[i].angle);
219 av_free(vc->mappings[i].mux);
221 av_freep(&vc->mappings);
224 // Parse setup header -------------------------------------------------
226 // Process codebooks part
228 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
231 uint8_t *tmp_vlc_bits = NULL;
232 uint32_t *tmp_vlc_codes = NULL;
233 GetBitContext *gb = &vc->gb;
234 uint16_t *codebook_multiplicands = NULL;
237 vc->codebook_count = get_bits(gb, 8) + 1;
239 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
241 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
242 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
243 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
244 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
245 if (!vc->codebooks ||
246 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
247 ret = AVERROR(ENOMEM);
251 for (cb = 0; cb < vc->codebook_count; ++cb) {
252 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
253 unsigned ordered, t, entries, used_entries = 0;
255 av_dlog(NULL, " %u. Codebook\n", cb);
257 if (get_bits(gb, 24) != 0x564342) {
258 av_log(vc->avctx, AV_LOG_ERROR,
259 " %u. Codebook setup data corrupt.\n", cb);
260 ret = AVERROR_INVALIDDATA;
264 codebook_setup->dimensions=get_bits(gb, 16);
265 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
266 av_log(vc->avctx, AV_LOG_ERROR,
267 " %u. Codebook's dimension is invalid (%d).\n",
268 cb, codebook_setup->dimensions);
269 ret = AVERROR_INVALIDDATA;
272 entries = get_bits(gb, 24);
273 if (entries > V_MAX_VLCS) {
274 av_log(vc->avctx, AV_LOG_ERROR,
275 " %u. Codebook has too many entries (%u).\n",
277 ret = AVERROR_INVALIDDATA;
281 ordered = get_bits1(gb);
283 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
284 codebook_setup->dimensions, entries);
288 unsigned sparse = get_bits1(gb);
290 av_dlog(NULL, " not ordered \n");
293 av_dlog(NULL, " sparse \n");
296 for (ce = 0; ce < entries; ++ce) {
297 flag = get_bits1(gb);
299 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
302 tmp_vlc_bits[ce] = 0;
305 av_dlog(NULL, " not sparse \n");
307 used_entries = entries;
308 for (ce = 0; ce < entries; ++ce)
309 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
312 unsigned current_entry = 0;
313 unsigned current_length = get_bits(gb, 5) + 1;
315 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
317 used_entries = entries;
318 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
321 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
323 number = get_bits(gb, ilog(entries - current_entry));
325 av_dlog(NULL, " number: %u\n", number);
327 for (i = current_entry; i < number+current_entry; ++i)
328 if (i < used_entries)
329 tmp_vlc_bits[i] = current_length;
331 current_entry+=number;
333 if (current_entry>used_entries) {
334 av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
335 ret = AVERROR_INVALIDDATA;
340 codebook_setup->lookup_type = get_bits(gb, 4);
342 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
343 codebook_setup->lookup_type ? "vq" : "no lookup");
345 // If the codebook is used for (inverse) VQ, calculate codevectors.
347 if (codebook_setup->lookup_type == 1) {
349 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
351 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
352 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
353 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
354 unsigned codebook_sequence_p = get_bits1(gb);
356 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
357 codebook_lookup_values);
358 av_dlog(NULL, " delta %f minmum %f \n",
359 codebook_delta_value, codebook_minimum_value);
361 for (i = 0; i < codebook_lookup_values; ++i) {
362 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
364 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
365 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
366 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
369 // Weed out unused vlcs and build codevector vector
371 codebook_setup->codevectors =
372 av_mallocz(used_entries * codebook_setup->dimensions *
373 sizeof(*codebook_setup->codevectors));
374 if (!codebook_setup->codevectors)
375 return AVERROR(ENOMEM);
377 codebook_setup->codevectors = NULL;
379 for (j = 0, i = 0; i < entries; ++i) {
380 unsigned dim = codebook_setup->dimensions;
382 if (tmp_vlc_bits[i]) {
384 unsigned lookup_offset = i;
386 av_dlog(vc->avctx, "Lookup offset %u ,", i);
388 for (k = 0; k < dim; ++k) {
389 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
390 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
391 if (codebook_sequence_p)
392 last = codebook_setup->codevectors[j * dim + k];
393 lookup_offset/=codebook_lookup_values;
395 tmp_vlc_bits[j] = tmp_vlc_bits[i];
397 av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
398 for (k = 0; k < dim; ++k)
399 av_dlog(vc->avctx, " %f ",
400 codebook_setup->codevectors[j * dim + k]);
401 av_dlog(vc->avctx, "\n");
406 if (j != used_entries) {
407 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
408 ret = AVERROR_INVALIDDATA;
411 entries = used_entries;
412 } else if (codebook_setup->lookup_type >= 2) {
413 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
414 ret = AVERROR_INVALIDDATA;
418 // Initialize VLC table
419 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
420 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
421 ret = AVERROR_INVALIDDATA;
424 codebook_setup->maxdepth = 0;
425 for (t = 0; t < entries; ++t)
426 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
427 codebook_setup->maxdepth = tmp_vlc_bits[t];
429 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
430 codebook_setup->nb_bits = V_NB_BITS2;
432 codebook_setup->nb_bits = V_NB_BITS;
434 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
436 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
437 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
438 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
439 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
441 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
446 av_free(tmp_vlc_bits);
447 av_free(tmp_vlc_codes);
448 av_free(codebook_multiplicands);
453 av_free(tmp_vlc_bits);
454 av_free(tmp_vlc_codes);
455 av_free(codebook_multiplicands);
459 // Process time domain transforms part (unused in Vorbis I)
461 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
463 GetBitContext *gb = &vc->gb;
464 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
466 for (i = 0; i < vorbis_time_count; ++i) {
467 unsigned vorbis_tdtransform = get_bits(gb, 16);
469 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
470 vorbis_time_count, vorbis_tdtransform);
472 if (vorbis_tdtransform) {
473 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
474 return AVERROR_INVALIDDATA;
480 // Process floors part
482 static int vorbis_floor0_decode(vorbis_context *vc,
483 vorbis_floor_data *vfu, float *vec);
484 static int create_map(vorbis_context *vc, unsigned floor_number);
485 static int vorbis_floor1_decode(vorbis_context *vc,
486 vorbis_floor_data *vfu, float *vec);
487 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
489 GetBitContext *gb = &vc->gb;
492 vc->floor_count = get_bits(gb, 6) + 1;
494 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
496 return AVERROR(ENOMEM);
498 for (i = 0; i < vc->floor_count; ++i) {
499 vorbis_floor *floor_setup = &vc->floors[i];
501 floor_setup->floor_type = get_bits(gb, 16);
503 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
505 if (floor_setup->floor_type == 1) {
506 int maximum_class = -1;
507 unsigned rangebits, rangemax, floor1_values = 2;
509 floor_setup->decode = vorbis_floor1_decode;
511 floor_setup->data.t1.partitions = get_bits(gb, 5);
513 av_dlog(NULL, " %d.floor: %d partitions \n",
514 i, floor_setup->data.t1.partitions);
516 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
517 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
518 if (floor_setup->data.t1.partition_class[j] > maximum_class)
519 maximum_class = floor_setup->data.t1.partition_class[j];
521 av_dlog(NULL, " %d. floor %d partition class %d \n",
522 i, j, floor_setup->data.t1.partition_class[j]);
526 av_dlog(NULL, " maximum class %d \n", maximum_class);
528 for (j = 0; j <= maximum_class; ++j) {
529 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
530 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
532 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
533 floor_setup->data.t1.class_dimensions[j],
534 floor_setup->data.t1.class_subclasses[j]);
536 if (floor_setup->data.t1.class_subclasses[j]) {
537 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
539 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
542 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
543 int16_t bits = get_bits(gb, 8) - 1;
545 VALIDATE_INDEX(bits, vc->codebook_count)
546 floor_setup->data.t1.subclass_books[j][k] = bits;
548 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
552 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
553 floor_setup->data.t1.x_list_dim = 2;
555 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
556 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
558 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
559 sizeof(*floor_setup->data.t1.list));
560 if (!floor_setup->data.t1.list)
561 return AVERROR(ENOMEM);
563 rangebits = get_bits(gb, 4);
564 rangemax = (1 << rangebits);
565 if (rangemax > vc->blocksize[1] / 2) {
566 av_log(vc->avctx, AV_LOG_ERROR,
567 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
568 rangemax, vc->blocksize[1] / 2);
569 return AVERROR_INVALIDDATA;
571 floor_setup->data.t1.list[0].x = 0;
572 floor_setup->data.t1.list[1].x = rangemax;
574 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
575 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
576 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
578 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
579 floor_setup->data.t1.list[floor1_values].x);
583 // Precalculate order of x coordinates - needed for decode
584 if (ff_vorbis_ready_floor1_list(vc->avctx,
585 floor_setup->data.t1.list,
586 floor_setup->data.t1.x_list_dim)) {
587 return AVERROR_INVALIDDATA;
589 } else if (floor_setup->floor_type == 0) {
590 unsigned max_codebook_dim = 0;
592 floor_setup->decode = vorbis_floor0_decode;
594 floor_setup->data.t0.order = get_bits(gb, 8);
595 if (!floor_setup->data.t0.order) {
596 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
597 return AVERROR_INVALIDDATA;
599 floor_setup->data.t0.rate = get_bits(gb, 16);
600 if (!floor_setup->data.t0.rate) {
601 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
602 return AVERROR_INVALIDDATA;
604 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
605 if (!floor_setup->data.t0.bark_map_size) {
606 av_log(vc->avctx, AV_LOG_ERROR,
607 "Floor 0 bark map size is 0.\n");
608 return AVERROR_INVALIDDATA;
610 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
611 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
612 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
614 /* allocate mem for booklist */
615 floor_setup->data.t0.book_list =
616 av_malloc(floor_setup->data.t0.num_books);
617 if (!floor_setup->data.t0.book_list)
618 return AVERROR(ENOMEM);
619 /* read book indexes */
623 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
624 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
625 floor_setup->data.t0.book_list[idx] = book_idx;
626 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
627 max_codebook_dim = vc->codebooks[book_idx].dimensions;
631 if ((ret = create_map(vc, i)) < 0)
634 /* codebook dim is for padding if codebook dim doesn't *
635 * divide order+1 then we need to read more data */
636 floor_setup->data.t0.lsp =
637 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
638 * sizeof(*floor_setup->data.t0.lsp));
639 if (!floor_setup->data.t0.lsp)
640 return AVERROR(ENOMEM);
642 /* debug output parsed headers */
643 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
644 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
645 av_dlog(NULL, "floor0 bark map size: %u\n",
646 floor_setup->data.t0.bark_map_size);
647 av_dlog(NULL, "floor0 amplitude bits: %u\n",
648 floor_setup->data.t0.amplitude_bits);
649 av_dlog(NULL, "floor0 amplitude offset: %u\n",
650 floor_setup->data.t0.amplitude_offset);
651 av_dlog(NULL, "floor0 number of books: %u\n",
652 floor_setup->data.t0.num_books);
653 av_dlog(NULL, "floor0 book list pointer: %p\n",
654 floor_setup->data.t0.book_list);
657 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
658 av_dlog(NULL, " Book %d: %u\n", idx + 1,
659 floor_setup->data.t0.book_list[idx]);
663 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
664 return AVERROR_INVALIDDATA;
670 // Process residues part
672 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
674 GetBitContext *gb = &vc->gb;
677 vc->residue_count = get_bits(gb, 6)+1;
678 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
680 return AVERROR(ENOMEM);
682 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
684 for (i = 0; i < vc->residue_count; ++i) {
685 vorbis_residue *res_setup = &vc->residues[i];
687 unsigned high_bits, low_bits;
689 res_setup->type = get_bits(gb, 16);
691 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
693 res_setup->begin = get_bits(gb, 24);
694 res_setup->end = get_bits(gb, 24);
695 res_setup->partition_size = get_bits(gb, 24) + 1;
696 /* Validations to prevent a buffer overflow later. */
697 if (res_setup->begin>res_setup->end ||
698 res_setup->end > (res_setup->type == 2 ? vc->avctx->channels : 1) * vc->blocksize[1] / 2 ||
699 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
700 av_log(vc->avctx, AV_LOG_ERROR,
701 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
702 res_setup->type, res_setup->begin, res_setup->end,
703 res_setup->partition_size, vc->blocksize[1] / 2);
704 return AVERROR_INVALIDDATA;
707 res_setup->classifications = get_bits(gb, 6) + 1;
708 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
710 res_setup->ptns_to_read =
711 (res_setup->end - res_setup->begin) / res_setup->partition_size;
712 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
714 sizeof(*res_setup->classifs));
715 if (!res_setup->classifs)
716 return AVERROR(ENOMEM);
718 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
719 res_setup->begin, res_setup->end, res_setup->partition_size,
720 res_setup->classifications, res_setup->classbook);
722 for (j = 0; j < res_setup->classifications; ++j) {
724 low_bits = get_bits(gb, 3);
726 high_bits = get_bits(gb, 5);
727 cascade[j] = (high_bits << 3) + low_bits;
729 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
732 res_setup->maxpass = 0;
733 for (j = 0; j < res_setup->classifications; ++j) {
734 for (k = 0; k < 8; ++k) {
735 if (cascade[j]&(1 << k)) {
736 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
738 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
739 j, k, res_setup->books[j][k]);
741 if (k>res_setup->maxpass)
742 res_setup->maxpass = k;
744 res_setup->books[j][k] = -1;
752 // Process mappings part
754 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
756 GetBitContext *gb = &vc->gb;
759 vc->mapping_count = get_bits(gb, 6)+1;
760 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
762 return AVERROR(ENOMEM);
764 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
766 for (i = 0; i < vc->mapping_count; ++i) {
767 vorbis_mapping *mapping_setup = &vc->mappings[i];
769 if (get_bits(gb, 16)) {
770 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
771 return AVERROR_INVALIDDATA;
774 mapping_setup->submaps = get_bits(gb, 4) + 1;
776 mapping_setup->submaps = 1;
780 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
781 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
782 sizeof(*mapping_setup->magnitude));
783 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
784 sizeof(*mapping_setup->angle));
785 if (!mapping_setup->angle || !mapping_setup->magnitude)
786 return AVERROR(ENOMEM);
788 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
789 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
790 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
793 mapping_setup->coupling_steps = 0;
796 av_dlog(NULL, " %u mapping coupling steps: %d\n",
797 i, mapping_setup->coupling_steps);
799 if (get_bits(gb, 2)) {
800 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
801 return AVERROR_INVALIDDATA; // following spec.
804 if (mapping_setup->submaps>1) {
805 mapping_setup->mux = av_mallocz(vc->audio_channels *
806 sizeof(*mapping_setup->mux));
807 if (!mapping_setup->mux)
808 return AVERROR(ENOMEM);
810 for (j = 0; j < vc->audio_channels; ++j)
811 mapping_setup->mux[j] = get_bits(gb, 4);
814 for (j = 0; j < mapping_setup->submaps; ++j) {
815 skip_bits(gb, 8); // FIXME check?
816 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
817 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
819 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
820 mapping_setup->submap_floor[j],
821 mapping_setup->submap_residue[j]);
827 // Process modes part
829 static int create_map(vorbis_context *vc, unsigned floor_number)
831 vorbis_floor *floors = vc->floors;
837 for (blockflag = 0; blockflag < 2; ++blockflag) {
838 n = vc->blocksize[blockflag] / 2;
839 floors[floor_number].data.t0.map[blockflag] =
840 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
841 if (!floors[floor_number].data.t0.map[blockflag])
842 return AVERROR(ENOMEM);
844 map = floors[floor_number].data.t0.map[blockflag];
845 vf = &floors[floor_number].data.t0;
847 for (idx = 0; idx < n; ++idx) {
848 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
849 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
850 if (vf->bark_map_size-1 < map[idx])
851 map[idx] = vf->bark_map_size - 1;
854 vf->map_size[blockflag] = n;
857 for (idx = 0; idx <= n; ++idx) {
858 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
864 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
866 GetBitContext *gb = &vc->gb;
869 vc->mode_count = get_bits(gb, 6) + 1;
870 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
872 return AVERROR(ENOMEM);
874 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
876 for (i = 0; i < vc->mode_count; ++i) {
877 vorbis_mode *mode_setup = &vc->modes[i];
879 mode_setup->blockflag = get_bits1(gb);
880 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
881 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
882 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
884 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
885 i, mode_setup->blockflag, mode_setup->windowtype,
886 mode_setup->transformtype, mode_setup->mapping);
891 // Process the whole setup header using the functions above
893 static int vorbis_parse_setup_hdr(vorbis_context *vc)
895 GetBitContext *gb = &vc->gb;
898 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
899 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
900 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
901 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
902 return AVERROR_INVALIDDATA;
905 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
906 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
909 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
910 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
913 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
914 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
917 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
918 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
921 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
922 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
925 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
926 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
929 if (!get_bits1(gb)) {
930 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
931 return AVERROR_INVALIDDATA; // framing flag bit unset error
937 // Process the identification header
939 static int vorbis_parse_id_hdr(vorbis_context *vc)
941 GetBitContext *gb = &vc->gb;
944 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
945 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
946 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
947 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
948 return AVERROR_INVALIDDATA;
951 vc->version = get_bits_long(gb, 32); //FIXME check 0
952 vc->audio_channels = get_bits(gb, 8);
953 if (vc->audio_channels <= 0) {
954 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
955 return AVERROR_INVALIDDATA;
957 vc->audio_samplerate = get_bits_long(gb, 32);
958 if (vc->audio_samplerate <= 0) {
959 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
960 return AVERROR_INVALIDDATA;
962 vc->bitrate_maximum = get_bits_long(gb, 32);
963 vc->bitrate_nominal = get_bits_long(gb, 32);
964 vc->bitrate_minimum = get_bits_long(gb, 32);
965 bl0 = get_bits(gb, 4);
966 bl1 = get_bits(gb, 4);
967 vc->blocksize[0] = (1 << bl0);
968 vc->blocksize[1] = (1 << bl1);
969 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
970 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
971 return AVERROR_INVALIDDATA;
973 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
974 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
976 if ((get_bits1(gb)) == 0) {
977 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
978 return AVERROR_INVALIDDATA;
981 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
982 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
983 if (!vc->channel_residues || !vc->saved)
984 return AVERROR(ENOMEM);
986 vc->previous_window = 0;
988 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
989 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
991 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 ",
992 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
995 BLK = vc->blocksize[0];
996 for (i = 0; i < BLK / 2; ++i) {
997 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)));
1004 // Process the extradata using the functions above (identification header, setup header)
1006 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1008 vorbis_context *vc = avctx->priv_data;
1009 uint8_t *headers = avctx->extradata;
1010 int headers_len = avctx->extradata_size;
1011 uint8_t *header_start[3];
1013 GetBitContext *gb = &vc->gb;
1017 ff_vorbisdsp_init(&vc->dsp);
1018 avpriv_float_dsp_init(&vc->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
1020 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1023 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1024 return AVERROR_INVALIDDATA;
1027 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1028 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1032 init_get_bits(gb, header_start[0], header_len[0]*8);
1033 hdr_type = get_bits(gb, 8);
1034 if (hdr_type != 1) {
1035 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1036 return AVERROR_INVALIDDATA;
1038 if ((ret = vorbis_parse_id_hdr(vc))) {
1039 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1044 init_get_bits(gb, header_start[2], header_len[2]*8);
1045 hdr_type = get_bits(gb, 8);
1046 if (hdr_type != 5) {
1047 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1049 return AVERROR_INVALIDDATA;
1051 if ((ret = vorbis_parse_setup_hdr(vc))) {
1052 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1057 if (vc->audio_channels > 8)
1058 avctx->channel_layout = 0;
1060 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1062 avctx->channels = vc->audio_channels;
1063 avctx->sample_rate = vc->audio_samplerate;
1068 // Decode audiopackets -------------------------------------------------
1070 // Read and decode floor
1072 static int vorbis_floor0_decode(vorbis_context *vc,
1073 vorbis_floor_data *vfu, float *vec)
1075 vorbis_floor0 *vf = &vfu->t0;
1076 float *lsp = vf->lsp;
1077 unsigned amplitude, book_idx;
1078 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1080 if (!vf->amplitude_bits)
1083 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1084 if (amplitude > 0) {
1086 unsigned idx, lsp_len = 0;
1087 vorbis_codebook codebook;
1089 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1090 if (book_idx >= vf->num_books) {
1091 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1094 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1095 codebook = vc->codebooks[vf->book_list[book_idx]];
1096 /* Invalid codebook! */
1097 if (!codebook.codevectors)
1098 return AVERROR_INVALIDDATA;
1100 while (lsp_len<vf->order) {
1103 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1104 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1105 /* read temp vector */
1106 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1107 codebook.nb_bits, codebook.maxdepth)
1108 * codebook.dimensions;
1109 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1110 /* copy each vector component and add last to it */
1111 for (idx = 0; idx < codebook.dimensions; ++idx)
1112 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1113 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1115 lsp_len += codebook.dimensions;
1117 /* DEBUG: output lsp coeffs */
1120 for (idx = 0; idx < lsp_len; ++idx)
1121 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1124 /* synthesize floor output vector */
1127 int order = vf->order;
1128 float wstep = M_PI / vf->bark_map_size;
1130 for (i = 0; i < order; i++)
1131 lsp[i] = 2.0f * cos(lsp[i]);
1133 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1134 vf->map_size[blockflag], order, wstep);
1137 while (i < vf->map_size[blockflag]) {
1138 int j, iter_cond = vf->map[blockflag][i];
1141 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1143 /* similar part for the q and p products */
1144 for (j = 0; j + 1 < order; j += 2) {
1145 q *= lsp[j] - two_cos_w;
1146 p *= lsp[j + 1] - two_cos_w;
1148 if (j == order) { // even order
1149 p *= p * (2.0f - two_cos_w);
1150 q *= q * (2.0f + two_cos_w);
1151 } else { // odd order
1152 q *= two_cos_w-lsp[j]; // one more time for q
1154 /* final step and square */
1155 p *= p * (4.f - two_cos_w * two_cos_w);
1159 /* calculate linear floor value */
1160 q = exp((((amplitude*vf->amplitude_offset) /
1161 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1162 - vf->amplitude_offset) * .11512925f);
1167 } while (vf->map[blockflag][i] == iter_cond);
1171 /* this channel is unused */
1175 av_dlog(NULL, " Floor0 decoded\n");
1180 static int vorbis_floor1_decode(vorbis_context *vc,
1181 vorbis_floor_data *vfu, float *vec)
1183 vorbis_floor1 *vf = &vfu->t1;
1184 GetBitContext *gb = &vc->gb;
1185 uint16_t range_v[4] = { 256, 128, 86, 64 };
1186 unsigned range = range_v[vf->multiplier - 1];
1187 uint16_t floor1_Y[258];
1188 uint16_t floor1_Y_final[258];
1189 int floor1_flag[258];
1190 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1191 int book, adx, ady, dy, off, predicted, err;
1194 if (!get_bits1(gb)) // silence
1197 // Read values (or differences) for the floor's points
1199 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1200 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1202 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1205 for (i = 0; i < vf->partitions; ++i) {
1206 class = vf->partition_class[i];
1207 cdim = vf->class_dimensions[class];
1208 cbits = vf->class_subclasses[class];
1209 csub = (1 << cbits) - 1;
1212 av_dlog(NULL, "Cbits %u\n", cbits);
1214 if (cbits) // this reads all subclasses for this partition's class
1215 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1216 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1218 for (j = 0; j < cdim; ++j) {
1219 book = vf->subclass_books[class][cval & csub];
1221 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1222 book, cbits, cval, get_bits_count(gb));
1224 cval = cval >> cbits;
1226 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1227 vc->codebooks[book].nb_bits, 3);
1229 floor1_Y[offset+j] = 0;
1232 av_dlog(NULL, " floor(%d) = %d \n",
1233 vf->list[offset+j].x, floor1_Y[offset+j]);
1238 // Amplitude calculation from the differences
1242 floor1_Y_final[0] = floor1_Y[0];
1243 floor1_Y_final[1] = floor1_Y[1];
1245 for (i = 2; i < vf->x_list_dim; ++i) {
1246 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1248 low_neigh_offs = vf->list[i].low;
1249 high_neigh_offs = vf->list[i].high;
1250 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1251 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1253 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1256 predicted = floor1_Y_final[low_neigh_offs] - off;
1258 predicted = floor1_Y_final[low_neigh_offs] + off;
1259 } // render_point end
1262 highroom = range-predicted;
1263 lowroom = predicted;
1264 if (highroom < lowroom) {
1265 room = highroom * 2;
1267 room = lowroom * 2; // SPEC misspelling
1270 floor1_flag[low_neigh_offs] = 1;
1271 floor1_flag[high_neigh_offs] = 1;
1274 if (highroom > lowroom) {
1275 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1277 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1281 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1283 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1288 floor1_Y_final[i] = av_clip_uint16(predicted);
1291 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1292 vf->list[i].x, floor1_Y_final[i], val);
1295 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1297 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1299 av_dlog(NULL, " Floor decoded\n");
1304 static av_always_inline int setup_classifs(vorbis_context *vc,
1306 uint8_t *do_not_decode,
1308 int partition_count)
1310 vorbis_codebook *codebook = vc->codebooks + vr->classbook;
1312 unsigned c_p_c = codebook->dimensions;
1313 unsigned inverse_class = ff_inverse[vr->classifications];
1315 for (p = 0, j = 0; j < ch_used; ++j) {
1316 if (!do_not_decode[j]) {
1317 temp = get_vlc2(&vc->gb, codebook->vlc.table,
1318 codebook->nb_bits, 3);
1320 av_dlog(NULL, "Classword: %u\n", temp);
1323 av_log(vc->avctx, AV_LOG_ERROR,
1324 "Invalid vlc code decoding %d channel.", j);
1325 return AVERROR_INVALIDDATA;
1328 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1329 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1331 if (i < vr->ptns_to_read)
1332 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1336 p += vr->ptns_to_read;
1340 // Read and decode residue
1342 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1345 uint8_t *do_not_decode,
1351 GetBitContext *gb = &vc->gb;
1352 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1353 uint8_t *classifs = vr->classifs;
1354 unsigned pass, ch_used, i, j, k, l;
1355 unsigned max_output = (ch - 1) * vlen;
1356 int ptns_to_read = vr->ptns_to_read;
1359 for (j = 1; j < ch; ++j)
1360 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1361 if (do_not_decode[0])
1364 max_output += vr->end / ch;
1367 max_output += vr->end;
1370 if (max_output > ch_left * vlen) {
1371 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1372 return AVERROR_INVALIDDATA;
1375 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1377 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1378 int voffset, partition_count, j_times_ptns_to_read;
1380 voffset = vr->begin;
1381 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1383 int ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count);
1387 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1388 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1391 if (!do_not_decode[j]) {
1392 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1393 int vqbook = vr->books[vqclass][pass];
1395 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1397 unsigned dim = vc->codebooks[vqbook].dimensions;
1398 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1399 vorbis_codebook codebook = vc->codebooks[vqbook];
1403 voffs = voffset+j*vlen;
1404 for (k = 0; k < step; ++k) {
1405 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1406 for (l = 0; l < dim; ++l)
1407 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1409 } else if (vr_type == 1) {
1410 voffs = voffset + j * vlen;
1411 for (k = 0; k < step; ++k) {
1412 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1413 for (l = 0; l < dim; ++l, ++voffs) {
1414 vec[voffs]+=codebook.codevectors[coffs+l];
1416 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1417 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1420 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1421 voffs = voffset >> 1;
1424 for (k = 0; k < step; ++k) {
1425 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1426 vec[voffs + k ] += codebook.codevectors[coffs ];
1427 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1429 } else if (dim == 4) {
1430 for (k = 0; k < step; ++k, voffs += 2) {
1431 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1432 vec[voffs ] += codebook.codevectors[coffs ];
1433 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1434 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1435 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1438 for (k = 0; k < step; ++k) {
1439 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1440 for (l = 0; l < dim; l += 2, voffs++) {
1441 vec[voffs ] += codebook.codevectors[coffs + l ];
1442 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1444 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1445 pass, voffset / ch + (voffs % ch) * vlen,
1446 vec[voffset / ch + (voffs % ch) * vlen],
1447 codebook.codevectors[coffs + l], coffs, l);
1451 } else if (vr_type == 2) {
1452 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1453 unsigned voffs_mod = voffset - voffs_div * ch;
1455 for (k = 0; k < step; ++k) {
1456 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1457 for (l = 0; l < dim; ++l) {
1458 vec[voffs_div + voffs_mod * vlen] +=
1459 codebook.codevectors[coffs + l];
1461 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1462 pass, voffs_div + voffs_mod * vlen,
1463 vec[voffs_div + voffs_mod * vlen],
1464 codebook.codevectors[coffs + l], coffs, l);
1466 if (++voffs_mod == ch) {
1475 j_times_ptns_to_read += ptns_to_read;
1478 voffset += vr->partition_size;
1485 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1487 uint8_t *do_not_decode,
1488 float *vec, unsigned vlen,
1492 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1493 else if (vr->type == 1)
1494 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1495 else if (vr->type == 0)
1496 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1498 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1499 return AVERROR_INVALIDDATA;
1503 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1506 for (i = 0; i < blocksize; i++) {
1509 ang[i] = mag[i] - ang[i];
1511 float temp = ang[i];
1519 float temp = ang[i];
1527 // Decode the audio packet using the functions above
1529 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1531 GetBitContext *gb = &vc->gb;
1533 unsigned previous_window = vc->previous_window;
1534 unsigned mode_number, blockflag, blocksize;
1536 uint8_t no_residue[255];
1537 uint8_t do_not_decode[255];
1538 vorbis_mapping *mapping;
1539 float *ch_res_ptr = vc->channel_residues;
1540 uint8_t res_chan[255];
1541 unsigned res_num = 0;
1543 unsigned ch_left = vc->audio_channels;
1546 if (get_bits1(gb)) {
1547 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1548 return AVERROR_INVALIDDATA; // packet type not audio
1551 if (vc->mode_count == 1) {
1554 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1556 vc->mode_number = mode_number;
1557 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1559 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1560 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1562 blockflag = vc->modes[mode_number].blockflag;
1563 blocksize = vc->blocksize[blockflag];
1564 vlen = blocksize / 2;
1566 previous_window = get_bits(gb, 1);
1567 skip_bits1(gb); // next_window
1570 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1571 for (i = 0; i < vc->audio_channels; ++i)
1572 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1576 for (i = 0; i < vc->audio_channels; ++i) {
1577 vorbis_floor *floor;
1579 if (mapping->submaps > 1) {
1580 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1582 floor = &vc->floors[mapping->submap_floor[0]];
1585 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1588 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1589 return AVERROR_INVALIDDATA;
1591 no_residue[i] = ret;
1594 // Nonzero vector propagate
1596 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1597 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1598 no_residue[mapping->magnitude[i]] = 0;
1599 no_residue[mapping->angle[i]] = 0;
1605 for (i = 0; i < mapping->submaps; ++i) {
1606 vorbis_residue *residue;
1610 for (j = 0; j < vc->audio_channels; ++j) {
1611 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1612 res_chan[j] = res_num;
1613 if (no_residue[j]) {
1614 do_not_decode[ch] = 1;
1616 do_not_decode[ch] = 0;
1622 residue = &vc->residues[mapping->submap_residue[i]];
1624 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1625 return AVERROR_INVALIDDATA;
1628 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1633 ch_res_ptr += ch * vlen;
1638 return AVERROR_INVALIDDATA;
1642 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1645 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1646 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1647 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1652 mdct = &vc->mdct[blockflag];
1654 for (j = vc->audio_channels-1;j >= 0; j--) {
1655 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1656 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1657 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1660 // Overlap/add, save data for next overlapping
1662 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1663 for (j = 0; j < vc->audio_channels; j++) {
1664 unsigned bs0 = vc->blocksize[0];
1665 unsigned bs1 = vc->blocksize[1];
1666 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1667 float *saved = vc->saved + j * bs1 / 4;
1668 float *ret = floor_ptr[j];
1669 float *buf = residue;
1670 const float *win = vc->win[blockflag & previous_window];
1672 if (blockflag == previous_window) {
1673 vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1674 } else if (blockflag > previous_window) {
1675 vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1676 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1678 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1679 vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1681 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1684 vc->previous_window = blockflag;
1688 // Return the decoded audio packet through the standard api
1690 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1691 int *got_frame_ptr, AVPacket *avpkt)
1693 const uint8_t *buf = avpkt->data;
1694 int buf_size = avpkt->size;
1695 vorbis_context *vc = avctx->priv_data;
1696 AVFrame *frame = data;
1697 GetBitContext *gb = &vc->gb;
1698 float *channel_ptrs[255];
1701 av_dlog(NULL, "packet length %d \n", buf_size);
1703 /* get output buffer */
1704 frame->nb_samples = vc->blocksize[1] / 2;
1705 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) {
1706 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1710 if (vc->audio_channels > 8) {
1711 for (i = 0; i < vc->audio_channels; i++)
1712 channel_ptrs[i] = (float *)frame->extended_data[i];
1714 for (i = 0; i < vc->audio_channels; i++) {
1715 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1716 channel_ptrs[ch] = (float *)frame->extended_data[i];
1720 init_get_bits(gb, buf, buf_size*8);
1722 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1725 if (!vc->first_frame) {
1726 vc->first_frame = 1;
1728 av_frame_unref(frame);
1732 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1733 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1735 frame->nb_samples = len;
1743 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1745 vorbis_context *vc = avctx->priv_data;
1752 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1754 vorbis_context *vc = avctx->priv_data;
1757 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1758 sizeof(*vc->saved));
1760 vc->previous_window = 0;
1763 AVCodec ff_vorbis_decoder = {
1765 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1766 .type = AVMEDIA_TYPE_AUDIO,
1767 .id = AV_CODEC_ID_VORBIS,
1768 .priv_data_size = sizeof(vorbis_context),
1769 .init = vorbis_decode_init,
1770 .close = vorbis_decode_close,
1771 .decode = vorbis_decode_frame,
1772 .flush = vorbis_decode_flush,
1773 .capabilities = CODEC_CAP_DR1,
1774 .channel_layouts = ff_vorbis_channel_layouts,
1775 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1776 AV_SAMPLE_FMT_NONE },