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"
33 #include "fmtconvert.h"
37 #include "vorbisdsp.h"
42 #define V_MAX_VLCS (1 << 16)
43 #define V_MAX_PARTITIONS (1 << 20)
57 typedef union vorbis_floor_u vorbis_floor_data;
58 typedef struct vorbis_floor0_s vorbis_floor0;
59 typedef struct vorbis_floor1_s vorbis_floor1;
60 struct vorbis_context_s;
62 int (* vorbis_floor_decode_func)
63 (struct vorbis_context_s *, vorbis_floor_data *, float *);
66 vorbis_floor_decode_func decode;
67 union vorbis_floor_u {
68 struct vorbis_floor0_s {
71 uint16_t bark_map_size;
74 uint8_t amplitude_bits;
75 uint8_t amplitude_offset;
80 struct vorbis_floor1_s {
82 uint8_t partition_class[32];
83 uint8_t class_dimensions[16];
84 uint8_t class_subclasses[16];
85 uint8_t class_masterbook[16];
86 int16_t subclass_books[16][8];
89 vorbis_floor1_entry *list;
98 unsigned partition_size;
99 uint8_t classifications;
101 int16_t books[64][8];
103 uint16_t ptns_to_read;
109 uint16_t coupling_steps;
113 uint8_t submap_floor[16];
114 uint8_t submap_residue[16];
120 uint16_t transformtype;
124 typedef struct vorbis_context_s {
125 AVCodecContext *avctx;
127 VorbisDSPContext dsp;
128 AVFloatDSPContext fdsp;
129 FmtConvertContext fmt_conv;
134 uint8_t audio_channels;
135 uint32_t audio_samplerate;
136 uint32_t bitrate_maximum;
137 uint32_t bitrate_nominal;
138 uint32_t bitrate_minimum;
139 uint32_t blocksize[2];
141 uint16_t codebook_count;
142 vorbis_codebook *codebooks;
144 vorbis_floor *floors;
145 uint8_t residue_count;
146 vorbis_residue *residues;
147 uint8_t mapping_count;
148 vorbis_mapping *mappings;
151 uint8_t mode_number; // mode number for the current packet
152 uint8_t previous_window;
153 float *channel_residues;
157 /* Helper functions */
160 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
162 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
163 #define VALIDATE_INDEX(idx, limit) \
165 av_log(vc->avctx, AV_LOG_ERROR,\
167 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
168 return AVERROR_INVALIDDATA;\
170 #define GET_VALIDATED_INDEX(idx, bits, limit) \
172 idx = get_bits(gb, bits);\
173 VALIDATE_INDEX(idx, limit)\
176 static float vorbisfloat2float(unsigned val)
178 double mant = val & 0x1fffff;
179 long exp = (val & 0x7fe00000L) >> 21;
180 if (val & 0x80000000)
182 return ldexp(mant, exp - 20 - 768);
186 // Free all allocated memory -----------------------------------------
188 static void vorbis_free(vorbis_context *vc)
192 av_freep(&vc->channel_residues);
193 av_freep(&vc->saved);
195 for (i = 0; i < vc->residue_count; i++)
196 av_free(vc->residues[i].classifs);
197 av_freep(&vc->residues);
198 av_freep(&vc->modes);
200 ff_mdct_end(&vc->mdct[0]);
201 ff_mdct_end(&vc->mdct[1]);
203 for (i = 0; i < vc->codebook_count; ++i) {
204 av_free(vc->codebooks[i].codevectors);
205 ff_free_vlc(&vc->codebooks[i].vlc);
207 av_freep(&vc->codebooks);
209 for (i = 0; i < vc->floor_count; ++i) {
210 if (vc->floors[i].floor_type == 0) {
211 av_free(vc->floors[i].data.t0.map[0]);
212 av_free(vc->floors[i].data.t0.map[1]);
213 av_free(vc->floors[i].data.t0.book_list);
214 av_free(vc->floors[i].data.t0.lsp);
216 av_free(vc->floors[i].data.t1.list);
219 av_freep(&vc->floors);
221 for (i = 0; i < vc->mapping_count; ++i) {
222 av_free(vc->mappings[i].magnitude);
223 av_free(vc->mappings[i].angle);
224 av_free(vc->mappings[i].mux);
226 av_freep(&vc->mappings);
229 // Parse setup header -------------------------------------------------
231 // Process codebooks part
233 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
236 uint8_t *tmp_vlc_bits;
237 uint32_t *tmp_vlc_codes;
238 GetBitContext *gb = &vc->gb;
239 uint16_t *codebook_multiplicands;
242 vc->codebook_count = get_bits(gb, 8) + 1;
244 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
246 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
247 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
248 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
249 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
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
370 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
371 codebook_setup->dimensions *
372 sizeof(*codebook_setup->codevectors))
374 for (j = 0, i = 0; i < entries; ++i) {
375 unsigned dim = codebook_setup->dimensions;
377 if (tmp_vlc_bits[i]) {
379 unsigned lookup_offset = i;
381 av_dlog(vc->avctx, "Lookup offset %u ,", i);
383 for (k = 0; k < dim; ++k) {
384 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
385 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
386 if (codebook_sequence_p)
387 last = codebook_setup->codevectors[j * dim + k];
388 lookup_offset/=codebook_lookup_values;
390 tmp_vlc_bits[j] = tmp_vlc_bits[i];
392 av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
393 for (k = 0; k < dim; ++k)
394 av_dlog(vc->avctx, " %f ",
395 codebook_setup->codevectors[j * dim + k]);
396 av_dlog(vc->avctx, "\n");
401 if (j != used_entries) {
402 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
403 ret = AVERROR_INVALIDDATA;
406 entries = used_entries;
407 } else if (codebook_setup->lookup_type >= 2) {
408 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
409 ret = AVERROR_INVALIDDATA;
413 // Initialize VLC table
414 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
415 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
416 ret = AVERROR_INVALIDDATA;
419 codebook_setup->maxdepth = 0;
420 for (t = 0; t < entries; ++t)
421 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
422 codebook_setup->maxdepth = tmp_vlc_bits[t];
424 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
425 codebook_setup->nb_bits = V_NB_BITS2;
427 codebook_setup->nb_bits = V_NB_BITS;
429 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
431 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
432 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
433 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
434 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
436 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
441 av_free(tmp_vlc_bits);
442 av_free(tmp_vlc_codes);
443 av_free(codebook_multiplicands);
448 av_free(tmp_vlc_bits);
449 av_free(tmp_vlc_codes);
450 av_free(codebook_multiplicands);
454 // Process time domain transforms part (unused in Vorbis I)
456 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
458 GetBitContext *gb = &vc->gb;
459 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
461 for (i = 0; i < vorbis_time_count; ++i) {
462 unsigned vorbis_tdtransform = get_bits(gb, 16);
464 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
465 vorbis_time_count, vorbis_tdtransform);
467 if (vorbis_tdtransform) {
468 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
469 return AVERROR_INVALIDDATA;
475 // Process floors part
477 static int vorbis_floor0_decode(vorbis_context *vc,
478 vorbis_floor_data *vfu, float *vec);
479 static void create_map(vorbis_context *vc, unsigned floor_number);
480 static int vorbis_floor1_decode(vorbis_context *vc,
481 vorbis_floor_data *vfu, float *vec);
482 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
484 GetBitContext *gb = &vc->gb;
487 vc->floor_count = get_bits(gb, 6) + 1;
489 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
491 for (i = 0; i < vc->floor_count; ++i) {
492 vorbis_floor *floor_setup = &vc->floors[i];
494 floor_setup->floor_type = get_bits(gb, 16);
496 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
498 if (floor_setup->floor_type == 1) {
499 int maximum_class = -1;
500 unsigned rangebits, rangemax, floor1_values = 2;
502 floor_setup->decode = vorbis_floor1_decode;
504 floor_setup->data.t1.partitions = get_bits(gb, 5);
506 av_dlog(NULL, " %d.floor: %d partitions \n",
507 i, floor_setup->data.t1.partitions);
509 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
510 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
511 if (floor_setup->data.t1.partition_class[j] > maximum_class)
512 maximum_class = floor_setup->data.t1.partition_class[j];
514 av_dlog(NULL, " %d. floor %d partition class %d \n",
515 i, j, floor_setup->data.t1.partition_class[j]);
519 av_dlog(NULL, " maximum class %d \n", maximum_class);
521 for (j = 0; j <= maximum_class; ++j) {
522 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
523 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
525 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
526 floor_setup->data.t1.class_dimensions[j],
527 floor_setup->data.t1.class_subclasses[j]);
529 if (floor_setup->data.t1.class_subclasses[j]) {
530 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
532 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
535 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
536 int16_t bits = get_bits(gb, 8) - 1;
538 VALIDATE_INDEX(bits, vc->codebook_count)
539 floor_setup->data.t1.subclass_books[j][k] = bits;
541 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
545 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
546 floor_setup->data.t1.x_list_dim = 2;
548 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
549 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
551 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
552 sizeof(*floor_setup->data.t1.list));
555 rangebits = get_bits(gb, 4);
556 rangemax = (1 << rangebits);
557 if (rangemax > vc->blocksize[1] / 2) {
558 av_log(vc->avctx, AV_LOG_ERROR,
559 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
560 rangemax, vc->blocksize[1] / 2);
561 return AVERROR_INVALIDDATA;
563 floor_setup->data.t1.list[0].x = 0;
564 floor_setup->data.t1.list[1].x = rangemax;
566 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
567 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
568 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
570 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
571 floor_setup->data.t1.list[floor1_values].x);
575 // Precalculate order of x coordinates - needed for decode
576 if (ff_vorbis_ready_floor1_list(vc->avctx,
577 floor_setup->data.t1.list,
578 floor_setup->data.t1.x_list_dim)) {
579 return AVERROR_INVALIDDATA;
581 } else if (floor_setup->floor_type == 0) {
582 unsigned max_codebook_dim = 0;
584 floor_setup->decode = vorbis_floor0_decode;
586 floor_setup->data.t0.order = get_bits(gb, 8);
587 if (!floor_setup->data.t0.order) {
588 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
589 return AVERROR_INVALIDDATA;
591 floor_setup->data.t0.rate = get_bits(gb, 16);
592 if (!floor_setup->data.t0.rate) {
593 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
594 return AVERROR_INVALIDDATA;
596 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
597 if (!floor_setup->data.t0.bark_map_size) {
598 av_log(vc->avctx, AV_LOG_ERROR,
599 "Floor 0 bark map size is 0.\n");
600 return AVERROR_INVALIDDATA;
602 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
603 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
604 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
606 /* allocate mem for booklist */
607 floor_setup->data.t0.book_list =
608 av_malloc(floor_setup->data.t0.num_books);
609 if (!floor_setup->data.t0.book_list)
610 return AVERROR(ENOMEM);
611 /* read book indexes */
615 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
616 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
617 floor_setup->data.t0.book_list[idx] = book_idx;
618 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
619 max_codebook_dim = vc->codebooks[book_idx].dimensions;
625 /* codebook dim is for padding if codebook dim doesn't *
626 * divide order+1 then we need to read more data */
627 floor_setup->data.t0.lsp =
628 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
629 * sizeof(*floor_setup->data.t0.lsp));
630 if (!floor_setup->data.t0.lsp)
631 return AVERROR(ENOMEM);
633 /* debug output parsed headers */
634 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
635 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
636 av_dlog(NULL, "floor0 bark map size: %u\n",
637 floor_setup->data.t0.bark_map_size);
638 av_dlog(NULL, "floor0 amplitude bits: %u\n",
639 floor_setup->data.t0.amplitude_bits);
640 av_dlog(NULL, "floor0 amplitude offset: %u\n",
641 floor_setup->data.t0.amplitude_offset);
642 av_dlog(NULL, "floor0 number of books: %u\n",
643 floor_setup->data.t0.num_books);
644 av_dlog(NULL, "floor0 book list pointer: %p\n",
645 floor_setup->data.t0.book_list);
648 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
649 av_dlog(NULL, " Book %d: %u\n", idx + 1,
650 floor_setup->data.t0.book_list[idx]);
654 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
655 return AVERROR_INVALIDDATA;
661 // Process residues part
663 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
665 GetBitContext *gb = &vc->gb;
668 vc->residue_count = get_bits(gb, 6)+1;
669 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
671 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
673 for (i = 0; i < vc->residue_count; ++i) {
674 vorbis_residue *res_setup = &vc->residues[i];
676 unsigned high_bits, low_bits;
678 res_setup->type = get_bits(gb, 16);
680 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
682 res_setup->begin = get_bits(gb, 24);
683 res_setup->end = get_bits(gb, 24);
684 res_setup->partition_size = get_bits(gb, 24) + 1;
685 /* Validations to prevent a buffer overflow later. */
686 if (res_setup->begin>res_setup->end ||
687 res_setup->end > (res_setup->type == 2 ? vc->avctx->channels : 1) * vc->blocksize[1] / 2 ||
688 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
689 av_log(vc->avctx, AV_LOG_ERROR,
690 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
691 res_setup->type, res_setup->begin, res_setup->end,
692 res_setup->partition_size, vc->blocksize[1] / 2);
693 return AVERROR_INVALIDDATA;
696 res_setup->classifications = get_bits(gb, 6) + 1;
697 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
699 res_setup->ptns_to_read =
700 (res_setup->end - res_setup->begin) / res_setup->partition_size;
701 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
703 sizeof(*res_setup->classifs));
704 if (!res_setup->classifs)
705 return AVERROR(ENOMEM);
707 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
708 res_setup->begin, res_setup->end, res_setup->partition_size,
709 res_setup->classifications, res_setup->classbook);
711 for (j = 0; j < res_setup->classifications; ++j) {
713 low_bits = get_bits(gb, 3);
715 high_bits = get_bits(gb, 5);
716 cascade[j] = (high_bits << 3) + low_bits;
718 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
721 res_setup->maxpass = 0;
722 for (j = 0; j < res_setup->classifications; ++j) {
723 for (k = 0; k < 8; ++k) {
724 if (cascade[j]&(1 << k)) {
725 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
727 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
728 j, k, res_setup->books[j][k]);
730 if (k>res_setup->maxpass)
731 res_setup->maxpass = k;
733 res_setup->books[j][k] = -1;
741 // Process mappings part
743 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
745 GetBitContext *gb = &vc->gb;
748 vc->mapping_count = get_bits(gb, 6)+1;
749 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
751 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
753 for (i = 0; i < vc->mapping_count; ++i) {
754 vorbis_mapping *mapping_setup = &vc->mappings[i];
756 if (get_bits(gb, 16)) {
757 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
758 return AVERROR_INVALIDDATA;
761 mapping_setup->submaps = get_bits(gb, 4) + 1;
763 mapping_setup->submaps = 1;
767 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
768 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
769 sizeof(*mapping_setup->magnitude));
770 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
771 sizeof(*mapping_setup->angle));
772 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
773 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
774 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
777 mapping_setup->coupling_steps = 0;
780 av_dlog(NULL, " %u mapping coupling steps: %d\n",
781 i, mapping_setup->coupling_steps);
783 if (get_bits(gb, 2)) {
784 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
785 return AVERROR_INVALIDDATA; // following spec.
788 if (mapping_setup->submaps>1) {
789 mapping_setup->mux = av_mallocz(vc->audio_channels *
790 sizeof(*mapping_setup->mux));
791 for (j = 0; j < vc->audio_channels; ++j)
792 mapping_setup->mux[j] = get_bits(gb, 4);
795 for (j = 0; j < mapping_setup->submaps; ++j) {
796 skip_bits(gb, 8); // FIXME check?
797 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
798 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
800 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
801 mapping_setup->submap_floor[j],
802 mapping_setup->submap_residue[j]);
808 // Process modes part
810 static void create_map(vorbis_context *vc, unsigned floor_number)
812 vorbis_floor *floors = vc->floors;
818 for (blockflag = 0; blockflag < 2; ++blockflag) {
819 n = vc->blocksize[blockflag] / 2;
820 floors[floor_number].data.t0.map[blockflag] =
821 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
823 map = floors[floor_number].data.t0.map[blockflag];
824 vf = &floors[floor_number].data.t0;
826 for (idx = 0; idx < n; ++idx) {
827 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
828 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
829 if (vf->bark_map_size-1 < map[idx])
830 map[idx] = vf->bark_map_size - 1;
833 vf->map_size[blockflag] = n;
836 for (idx = 0; idx <= n; ++idx) {
837 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
841 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
843 GetBitContext *gb = &vc->gb;
846 vc->mode_count = get_bits(gb, 6) + 1;
847 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
849 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
851 for (i = 0; i < vc->mode_count; ++i) {
852 vorbis_mode *mode_setup = &vc->modes[i];
854 mode_setup->blockflag = get_bits1(gb);
855 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
856 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
857 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
859 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
860 i, mode_setup->blockflag, mode_setup->windowtype,
861 mode_setup->transformtype, mode_setup->mapping);
866 // Process the whole setup header using the functions above
868 static int vorbis_parse_setup_hdr(vorbis_context *vc)
870 GetBitContext *gb = &vc->gb;
873 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
874 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
875 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
876 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
877 return AVERROR_INVALIDDATA;
880 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
881 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
884 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
885 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
888 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
889 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
892 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
893 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
896 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
897 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
900 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
901 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
904 if (!get_bits1(gb)) {
905 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
906 return AVERROR_INVALIDDATA; // framing flag bit unset error
912 // Process the identification header
914 static int vorbis_parse_id_hdr(vorbis_context *vc)
916 GetBitContext *gb = &vc->gb;
919 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
920 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
921 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
922 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
923 return AVERROR_INVALIDDATA;
926 vc->version = get_bits_long(gb, 32); //FIXME check 0
927 vc->audio_channels = get_bits(gb, 8);
928 if (vc->audio_channels <= 0) {
929 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
930 return AVERROR_INVALIDDATA;
932 vc->audio_samplerate = get_bits_long(gb, 32);
933 if (vc->audio_samplerate <= 0) {
934 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
935 return AVERROR_INVALIDDATA;
937 vc->bitrate_maximum = get_bits_long(gb, 32);
938 vc->bitrate_nominal = get_bits_long(gb, 32);
939 vc->bitrate_minimum = get_bits_long(gb, 32);
940 bl0 = get_bits(gb, 4);
941 bl1 = get_bits(gb, 4);
942 vc->blocksize[0] = (1 << bl0);
943 vc->blocksize[1] = (1 << bl1);
944 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
945 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
946 return AVERROR_INVALIDDATA;
948 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
949 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
951 if ((get_bits1(gb)) == 0) {
952 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
953 return AVERROR_INVALIDDATA;
956 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
957 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
958 vc->previous_window = 0;
960 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
961 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
963 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 ",
964 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
967 BLK = vc->blocksize[0];
968 for (i = 0; i < BLK / 2; ++i) {
969 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)));
976 // Process the extradata using the functions above (identification header, setup header)
978 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
980 vorbis_context *vc = avctx->priv_data;
981 uint8_t *headers = avctx->extradata;
982 int headers_len = avctx->extradata_size;
983 uint8_t *header_start[3];
985 GetBitContext *gb = &vc->gb;
989 ff_vorbisdsp_init(&vc->dsp);
990 avpriv_float_dsp_init(&vc->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
991 ff_fmt_convert_init(&vc->fmt_conv, avctx);
993 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
996 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
997 return AVERROR_INVALIDDATA;
1000 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1001 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1005 init_get_bits(gb, header_start[0], header_len[0]*8);
1006 hdr_type = get_bits(gb, 8);
1007 if (hdr_type != 1) {
1008 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1009 return AVERROR_INVALIDDATA;
1011 if ((ret = vorbis_parse_id_hdr(vc))) {
1012 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1017 init_get_bits(gb, header_start[2], header_len[2]*8);
1018 hdr_type = get_bits(gb, 8);
1019 if (hdr_type != 5) {
1020 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1022 return AVERROR_INVALIDDATA;
1024 if ((ret = vorbis_parse_setup_hdr(vc))) {
1025 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1030 if (vc->audio_channels > 8)
1031 avctx->channel_layout = 0;
1033 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1035 avctx->channels = vc->audio_channels;
1036 avctx->sample_rate = vc->audio_samplerate;
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 if (!vf->amplitude_bits)
1056 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1057 if (amplitude > 0) {
1059 unsigned idx, lsp_len = 0;
1060 vorbis_codebook codebook;
1062 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1063 if (book_idx >= vf->num_books) {
1064 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1067 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1068 codebook = vc->codebooks[vf->book_list[book_idx]];
1069 /* Invalid codebook! */
1070 if (!codebook.codevectors)
1071 return AVERROR_INVALIDDATA;
1073 while (lsp_len<vf->order) {
1076 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1077 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1078 /* read temp vector */
1079 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1080 codebook.nb_bits, codebook.maxdepth)
1081 * codebook.dimensions;
1082 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1083 /* copy each vector component and add last to it */
1084 for (idx = 0; idx < codebook.dimensions; ++idx)
1085 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1086 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1088 lsp_len += codebook.dimensions;
1090 /* DEBUG: output lsp coeffs */
1093 for (idx = 0; idx < lsp_len; ++idx)
1094 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1097 /* synthesize floor output vector */
1100 int order = vf->order;
1101 float wstep = M_PI / vf->bark_map_size;
1103 for (i = 0; i < order; i++)
1104 lsp[i] = 2.0f * cos(lsp[i]);
1106 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1107 vf->map_size[blockflag], order, wstep);
1110 while (i < vf->map_size[blockflag]) {
1111 int j, iter_cond = vf->map[blockflag][i];
1114 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1116 /* similar part for the q and p products */
1117 for (j = 0; j + 1 < order; j += 2) {
1118 q *= lsp[j] - two_cos_w;
1119 p *= lsp[j + 1] - two_cos_w;
1121 if (j == order) { // even order
1122 p *= p * (2.0f - two_cos_w);
1123 q *= q * (2.0f + two_cos_w);
1124 } else { // odd order
1125 q *= two_cos_w-lsp[j]; // one more time for q
1127 /* final step and square */
1128 p *= p * (4.f - two_cos_w * two_cos_w);
1132 /* calculate linear floor value */
1133 q = exp((((amplitude*vf->amplitude_offset) /
1134 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1135 - vf->amplitude_offset) * .11512925f);
1140 } while (vf->map[blockflag][i] == iter_cond);
1144 /* this channel is unused */
1148 av_dlog(NULL, " Floor0 decoded\n");
1153 static int vorbis_floor1_decode(vorbis_context *vc,
1154 vorbis_floor_data *vfu, float *vec)
1156 vorbis_floor1 *vf = &vfu->t1;
1157 GetBitContext *gb = &vc->gb;
1158 uint16_t range_v[4] = { 256, 128, 86, 64 };
1159 unsigned range = range_v[vf->multiplier - 1];
1160 uint16_t floor1_Y[258];
1161 uint16_t floor1_Y_final[258];
1162 int floor1_flag[258];
1163 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1164 int book, adx, ady, dy, off, predicted, err;
1167 if (!get_bits1(gb)) // silence
1170 // Read values (or differences) for the floor's points
1172 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1173 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1175 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1178 for (i = 0; i < vf->partitions; ++i) {
1179 class = vf->partition_class[i];
1180 cdim = vf->class_dimensions[class];
1181 cbits = vf->class_subclasses[class];
1182 csub = (1 << cbits) - 1;
1185 av_dlog(NULL, "Cbits %u\n", cbits);
1187 if (cbits) // this reads all subclasses for this partition's class
1188 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1189 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1191 for (j = 0; j < cdim; ++j) {
1192 book = vf->subclass_books[class][cval & csub];
1194 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1195 book, cbits, cval, get_bits_count(gb));
1197 cval = cval >> cbits;
1199 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1200 vc->codebooks[book].nb_bits, 3);
1202 floor1_Y[offset+j] = 0;
1205 av_dlog(NULL, " floor(%d) = %d \n",
1206 vf->list[offset+j].x, floor1_Y[offset+j]);
1211 // Amplitude calculation from the differences
1215 floor1_Y_final[0] = floor1_Y[0];
1216 floor1_Y_final[1] = floor1_Y[1];
1218 for (i = 2; i < vf->x_list_dim; ++i) {
1219 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1221 low_neigh_offs = vf->list[i].low;
1222 high_neigh_offs = vf->list[i].high;
1223 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1224 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1226 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1229 predicted = floor1_Y_final[low_neigh_offs] - off;
1231 predicted = floor1_Y_final[low_neigh_offs] + off;
1232 } // render_point end
1235 highroom = range-predicted;
1236 lowroom = predicted;
1237 if (highroom < lowroom) {
1238 room = highroom * 2;
1240 room = lowroom * 2; // SPEC misspelling
1243 floor1_flag[low_neigh_offs] = 1;
1244 floor1_flag[high_neigh_offs] = 1;
1247 if (highroom > lowroom) {
1248 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1250 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1254 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1256 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1261 floor1_Y_final[i] = av_clip_uint16(predicted);
1264 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1265 vf->list[i].x, floor1_Y_final[i], val);
1268 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1270 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1272 av_dlog(NULL, " Floor decoded\n");
1277 // Read and decode residue
1279 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1282 uint8_t *do_not_decode,
1288 GetBitContext *gb = &vc->gb;
1289 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1290 unsigned ptns_to_read = vr->ptns_to_read;
1291 uint8_t *classifs = vr->classifs;
1292 unsigned pass, ch_used, i, j, k, l;
1293 unsigned max_output = (ch - 1) * vlen;
1296 for (j = 1; j < ch; ++j)
1297 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1298 if (do_not_decode[0])
1301 max_output += vr->end / ch;
1304 max_output += vr->end;
1307 if (max_output > ch_left * vlen) {
1308 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1312 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1314 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1315 uint16_t voffset, partition_count, j_times_ptns_to_read;
1317 voffset = vr->begin;
1318 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1320 unsigned inverse_class = ff_inverse[vr->classifications];
1321 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1322 if (!do_not_decode[j]) {
1323 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1324 vc->codebooks[vr->classbook].nb_bits, 3);
1326 av_dlog(NULL, "Classword: %u\n", temp);
1328 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1329 for (i = 0; i < c_p_c; ++i) {
1332 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1333 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1334 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1338 j_times_ptns_to_read += ptns_to_read;
1341 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1342 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1345 if (!do_not_decode[j]) {
1346 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1347 int vqbook = vr->books[vqclass][pass];
1349 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1351 unsigned dim = vc->codebooks[vqbook].dimensions;
1352 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1353 vorbis_codebook codebook = vc->codebooks[vqbook];
1357 voffs = voffset+j*vlen;
1358 for (k = 0; k < step; ++k) {
1359 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1360 for (l = 0; l < dim; ++l)
1361 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1363 } else if (vr_type == 1) {
1364 voffs = voffset + j * vlen;
1365 for (k = 0; k < step; ++k) {
1366 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1367 for (l = 0; l < dim; ++l, ++voffs) {
1368 vec[voffs]+=codebook.codevectors[coffs+l];
1370 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1371 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1374 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1375 voffs = voffset >> 1;
1378 for (k = 0; k < step; ++k) {
1379 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1380 vec[voffs + k ] += codebook.codevectors[coffs ];
1381 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1383 } else if (dim == 4) {
1384 for (k = 0; k < step; ++k, voffs += 2) {
1385 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1386 vec[voffs ] += codebook.codevectors[coffs ];
1387 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1388 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1389 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1392 for (k = 0; k < step; ++k) {
1393 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1394 for (l = 0; l < dim; l += 2, voffs++) {
1395 vec[voffs ] += codebook.codevectors[coffs + l ];
1396 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1398 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1399 pass, voffset / ch + (voffs % ch) * vlen,
1400 vec[voffset / ch + (voffs % ch) * vlen],
1401 codebook.codevectors[coffs + l], coffs, l);
1405 } else if (vr_type == 2) {
1406 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1407 unsigned voffs_mod = voffset - voffs_div * ch;
1409 for (k = 0; k < step; ++k) {
1410 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1411 for (l = 0; l < dim; ++l) {
1412 vec[voffs_div + voffs_mod * vlen] +=
1413 codebook.codevectors[coffs + l];
1415 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1416 pass, voffs_div + voffs_mod * vlen,
1417 vec[voffs_div + voffs_mod * vlen],
1418 codebook.codevectors[coffs + l], coffs, l);
1420 if (++voffs_mod == ch) {
1429 j_times_ptns_to_read += ptns_to_read;
1432 voffset += vr->partition_size;
1439 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1441 uint8_t *do_not_decode,
1442 float *vec, unsigned vlen,
1446 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1447 else if (vr->type == 1)
1448 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1449 else if (vr->type == 0)
1450 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1452 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1453 return AVERROR_INVALIDDATA;
1457 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1460 for (i = 0; i < blocksize; i++) {
1463 ang[i] = mag[i] - ang[i];
1465 float temp = ang[i];
1473 float temp = ang[i];
1481 // Decode the audio packet using the functions above
1483 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1485 GetBitContext *gb = &vc->gb;
1487 unsigned previous_window = vc->previous_window;
1488 unsigned mode_number, blockflag, blocksize;
1490 uint8_t no_residue[255];
1491 uint8_t do_not_decode[255];
1492 vorbis_mapping *mapping;
1493 float *ch_res_ptr = vc->channel_residues;
1494 uint8_t res_chan[255];
1495 unsigned res_num = 0;
1497 unsigned ch_left = vc->audio_channels;
1500 if (get_bits1(gb)) {
1501 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1502 return AVERROR_INVALIDDATA; // packet type not audio
1505 if (vc->mode_count == 1) {
1508 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1510 vc->mode_number = mode_number;
1511 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1513 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1514 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1516 blockflag = vc->modes[mode_number].blockflag;
1517 blocksize = vc->blocksize[blockflag];
1518 vlen = blocksize / 2;
1520 previous_window = get_bits(gb, 1);
1521 skip_bits1(gb); // next_window
1524 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1525 for (i = 0; i < vc->audio_channels; ++i)
1526 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1530 for (i = 0; i < vc->audio_channels; ++i) {
1531 vorbis_floor *floor;
1533 if (mapping->submaps > 1) {
1534 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1536 floor = &vc->floors[mapping->submap_floor[0]];
1539 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1542 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1543 return AVERROR_INVALIDDATA;
1545 no_residue[i] = ret;
1548 // Nonzero vector propagate
1550 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1551 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1552 no_residue[mapping->magnitude[i]] = 0;
1553 no_residue[mapping->angle[i]] = 0;
1559 for (i = 0; i < mapping->submaps; ++i) {
1560 vorbis_residue *residue;
1564 for (j = 0; j < vc->audio_channels; ++j) {
1565 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1566 res_chan[j] = res_num;
1567 if (no_residue[j]) {
1568 do_not_decode[ch] = 1;
1570 do_not_decode[ch] = 0;
1576 residue = &vc->residues[mapping->submap_residue[i]];
1578 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1582 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1587 ch_res_ptr += ch * vlen;
1592 return AVERROR_INVALIDDATA;
1596 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1599 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1600 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1601 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1606 mdct = &vc->mdct[blockflag];
1608 for (j = vc->audio_channels-1;j >= 0; j--) {
1609 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1610 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1611 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1614 // Overlap/add, save data for next overlapping
1616 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1617 for (j = 0; j < vc->audio_channels; j++) {
1618 unsigned bs0 = vc->blocksize[0];
1619 unsigned bs1 = vc->blocksize[1];
1620 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1621 float *saved = vc->saved + j * bs1 / 4;
1622 float *ret = floor_ptr[j];
1623 float *buf = residue;
1624 const float *win = vc->win[blockflag & previous_window];
1626 if (blockflag == previous_window) {
1627 vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1628 } else if (blockflag > previous_window) {
1629 vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1630 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1632 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1633 vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1635 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1638 vc->previous_window = blockflag;
1642 // Return the decoded audio packet through the standard api
1644 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1645 int *got_frame_ptr, AVPacket *avpkt)
1647 const uint8_t *buf = avpkt->data;
1648 int buf_size = avpkt->size;
1649 vorbis_context *vc = avctx->priv_data;
1650 AVFrame *frame = data;
1651 GetBitContext *gb = &vc->gb;
1652 float *channel_ptrs[255];
1655 av_dlog(NULL, "packet length %d \n", buf_size);
1657 /* get output buffer */
1658 frame->nb_samples = vc->blocksize[1] / 2;
1659 if ((ret = ff_get_buffer(avctx, frame)) < 0) {
1660 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
1664 if (vc->audio_channels > 8) {
1665 for (i = 0; i < vc->audio_channels; i++)
1666 channel_ptrs[i] = (float *)frame->extended_data[i];
1668 for (i = 0; i < vc->audio_channels; i++) {
1669 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1670 channel_ptrs[ch] = (float *)frame->extended_data[i];
1674 init_get_bits(gb, buf, buf_size*8);
1676 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1679 if (!vc->first_frame) {
1680 vc->first_frame = 1;
1685 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1686 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1688 frame->nb_samples = len;
1696 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1698 vorbis_context *vc = avctx->priv_data;
1705 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1707 vorbis_context *vc = avctx->priv_data;
1710 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1711 sizeof(*vc->saved));
1713 vc->previous_window = 0;
1716 AVCodec ff_vorbis_decoder = {
1718 .type = AVMEDIA_TYPE_AUDIO,
1719 .id = AV_CODEC_ID_VORBIS,
1720 .priv_data_size = sizeof(vorbis_context),
1721 .init = vorbis_decode_init,
1722 .close = vorbis_decode_close,
1723 .decode = vorbis_decode_frame,
1724 .flush = vorbis_decode_flush,
1725 .capabilities = CODEC_CAP_DR1,
1726 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1727 .channel_layouts = ff_vorbis_channel_layouts,
1728 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1729 AV_SAMPLE_FMT_NONE },