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 *avccontext;
128 VorbisDSPContext dsp;
129 AVFloatDSPContext fdsp;
130 FmtConvertContext fmt_conv;
135 uint8_t audio_channels;
136 uint32_t audio_samplerate;
137 uint32_t bitrate_maximum;
138 uint32_t bitrate_nominal;
139 uint32_t bitrate_minimum;
140 uint32_t blocksize[2];
142 uint16_t codebook_count;
143 vorbis_codebook *codebooks;
145 vorbis_floor *floors;
146 uint8_t residue_count;
147 vorbis_residue *residues;
148 uint8_t mapping_count;
149 vorbis_mapping *mappings;
152 uint8_t mode_number; // mode number for the current packet
153 uint8_t previous_window;
154 float *channel_residues;
158 /* Helper functions */
161 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
163 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
164 #define VALIDATE_INDEX(idx, limit) \
166 av_log(vc->avccontext, AV_LOG_ERROR,\
168 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
169 return AVERROR_INVALIDDATA;\
171 #define GET_VALIDATED_INDEX(idx, bits, limit) \
173 idx = get_bits(gb, bits);\
174 VALIDATE_INDEX(idx, limit)\
177 static float vorbisfloat2float(unsigned val)
179 double mant = val & 0x1fffff;
180 long exp = (val & 0x7fe00000L) >> 21;
181 if (val & 0x80000000)
183 return ldexp(mant, exp - 20 - 768);
187 // Free all allocated memory -----------------------------------------
189 static void vorbis_free(vorbis_context *vc)
193 av_freep(&vc->channel_residues);
194 av_freep(&vc->saved);
196 for (i = 0; i < vc->residue_count; i++)
197 av_free(vc->residues[i].classifs);
198 av_freep(&vc->residues);
199 av_freep(&vc->modes);
201 ff_mdct_end(&vc->mdct[0]);
202 ff_mdct_end(&vc->mdct[1]);
204 for (i = 0; i < vc->codebook_count; ++i) {
205 av_free(vc->codebooks[i].codevectors);
206 ff_free_vlc(&vc->codebooks[i].vlc);
208 av_freep(&vc->codebooks);
210 for (i = 0; i < vc->floor_count; ++i) {
211 if (vc->floors[i].floor_type == 0) {
212 av_free(vc->floors[i].data.t0.map[0]);
213 av_free(vc->floors[i].data.t0.map[1]);
214 av_free(vc->floors[i].data.t0.book_list);
215 av_free(vc->floors[i].data.t0.lsp);
217 av_free(vc->floors[i].data.t1.list);
220 av_freep(&vc->floors);
222 for (i = 0; i < vc->mapping_count; ++i) {
223 av_free(vc->mappings[i].magnitude);
224 av_free(vc->mappings[i].angle);
225 av_free(vc->mappings[i].mux);
227 av_freep(&vc->mappings);
230 // Parse setup header -------------------------------------------------
232 // Process codebooks part
234 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
237 uint8_t *tmp_vlc_bits;
238 uint32_t *tmp_vlc_codes;
239 GetBitContext *gb = &vc->gb;
240 uint16_t *codebook_multiplicands;
243 vc->codebook_count = get_bits(gb, 8) + 1;
245 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
247 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
248 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
249 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
250 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
252 for (cb = 0; cb < vc->codebook_count; ++cb) {
253 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
254 unsigned ordered, t, entries, used_entries = 0;
256 av_dlog(NULL, " %u. Codebook\n", cb);
258 if (get_bits(gb, 24) != 0x564342) {
259 av_log(vc->avccontext, AV_LOG_ERROR,
260 " %u. Codebook setup data corrupt.\n", cb);
261 ret = AVERROR_INVALIDDATA;
265 codebook_setup->dimensions=get_bits(gb, 16);
266 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
267 av_log(vc->avccontext, AV_LOG_ERROR,
268 " %u. Codebook's dimension is invalid (%d).\n",
269 cb, codebook_setup->dimensions);
270 ret = AVERROR_INVALIDDATA;
273 entries = get_bits(gb, 24);
274 if (entries > V_MAX_VLCS) {
275 av_log(vc->avccontext, AV_LOG_ERROR,
276 " %u. Codebook has too many entries (%u).\n",
278 ret = AVERROR_INVALIDDATA;
282 ordered = get_bits1(gb);
284 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
285 codebook_setup->dimensions, entries);
289 unsigned sparse = get_bits1(gb);
291 av_dlog(NULL, " not ordered \n");
294 av_dlog(NULL, " sparse \n");
297 for (ce = 0; ce < entries; ++ce) {
298 flag = get_bits1(gb);
300 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
303 tmp_vlc_bits[ce] = 0;
306 av_dlog(NULL, " not sparse \n");
308 used_entries = entries;
309 for (ce = 0; ce < entries; ++ce)
310 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
313 unsigned current_entry = 0;
314 unsigned current_length = get_bits(gb, 5) + 1;
316 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
318 used_entries = entries;
319 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
322 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
324 number = get_bits(gb, ilog(entries - current_entry));
326 av_dlog(NULL, " number: %u\n", number);
328 for (i = current_entry; i < number+current_entry; ++i)
329 if (i < used_entries)
330 tmp_vlc_bits[i] = current_length;
332 current_entry+=number;
334 if (current_entry>used_entries) {
335 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
336 ret = AVERROR_INVALIDDATA;
341 codebook_setup->lookup_type = get_bits(gb, 4);
343 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
344 codebook_setup->lookup_type ? "vq" : "no lookup");
346 // If the codebook is used for (inverse) VQ, calculate codevectors.
348 if (codebook_setup->lookup_type == 1) {
350 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
352 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
353 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
354 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
355 unsigned codebook_sequence_p = get_bits1(gb);
357 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
358 codebook_lookup_values);
359 av_dlog(NULL, " delta %f minmum %f \n",
360 codebook_delta_value, codebook_minimum_value);
362 for (i = 0; i < codebook_lookup_values; ++i) {
363 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
365 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
366 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
367 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
370 // Weed out unused vlcs and build codevector vector
371 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
372 codebook_setup->dimensions *
373 sizeof(*codebook_setup->codevectors))
375 for (j = 0, i = 0; i < entries; ++i) {
376 unsigned dim = codebook_setup->dimensions;
378 if (tmp_vlc_bits[i]) {
380 unsigned lookup_offset = i;
382 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
384 for (k = 0; k < dim; ++k) {
385 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
386 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
387 if (codebook_sequence_p)
388 last = codebook_setup->codevectors[j * dim + k];
389 lookup_offset/=codebook_lookup_values;
391 tmp_vlc_bits[j] = tmp_vlc_bits[i];
393 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
394 for (k = 0; k < dim; ++k)
395 av_dlog(vc->avccontext, " %f ",
396 codebook_setup->codevectors[j * dim + k]);
397 av_dlog(vc->avccontext, "\n");
402 if (j != used_entries) {
403 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
404 ret = AVERROR_INVALIDDATA;
407 entries = used_entries;
408 } else if (codebook_setup->lookup_type >= 2) {
409 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
410 ret = AVERROR_INVALIDDATA;
414 // Initialize VLC table
415 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
416 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
417 ret = AVERROR_INVALIDDATA;
420 codebook_setup->maxdepth = 0;
421 for (t = 0; t < entries; ++t)
422 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
423 codebook_setup->maxdepth = tmp_vlc_bits[t];
425 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
426 codebook_setup->nb_bits = V_NB_BITS2;
428 codebook_setup->nb_bits = V_NB_BITS;
430 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
432 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
433 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
434 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
435 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
437 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
442 av_free(tmp_vlc_bits);
443 av_free(tmp_vlc_codes);
444 av_free(codebook_multiplicands);
449 av_free(tmp_vlc_bits);
450 av_free(tmp_vlc_codes);
451 av_free(codebook_multiplicands);
455 // Process time domain transforms part (unused in Vorbis I)
457 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
459 GetBitContext *gb = &vc->gb;
460 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
462 for (i = 0; i < vorbis_time_count; ++i) {
463 unsigned vorbis_tdtransform = get_bits(gb, 16);
465 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
466 vorbis_time_count, vorbis_tdtransform);
468 if (vorbis_tdtransform) {
469 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
470 return AVERROR_INVALIDDATA;
476 // Process floors part
478 static int vorbis_floor0_decode(vorbis_context *vc,
479 vorbis_floor_data *vfu, float *vec);
480 static void create_map(vorbis_context *vc, unsigned floor_number);
481 static int vorbis_floor1_decode(vorbis_context *vc,
482 vorbis_floor_data *vfu, float *vec);
483 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
485 GetBitContext *gb = &vc->gb;
488 vc->floor_count = get_bits(gb, 6) + 1;
490 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
492 for (i = 0; i < vc->floor_count; ++i) {
493 vorbis_floor *floor_setup = &vc->floors[i];
495 floor_setup->floor_type = get_bits(gb, 16);
497 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
499 if (floor_setup->floor_type == 1) {
500 int maximum_class = -1;
501 unsigned rangebits, rangemax, floor1_values = 2;
503 floor_setup->decode = vorbis_floor1_decode;
505 floor_setup->data.t1.partitions = get_bits(gb, 5);
507 av_dlog(NULL, " %d.floor: %d partitions \n",
508 i, floor_setup->data.t1.partitions);
510 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
511 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
512 if (floor_setup->data.t1.partition_class[j] > maximum_class)
513 maximum_class = floor_setup->data.t1.partition_class[j];
515 av_dlog(NULL, " %d. floor %d partition class %d \n",
516 i, j, floor_setup->data.t1.partition_class[j]);
520 av_dlog(NULL, " maximum class %d \n", maximum_class);
522 for (j = 0; j <= maximum_class; ++j) {
523 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
524 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
526 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
527 floor_setup->data.t1.class_dimensions[j],
528 floor_setup->data.t1.class_subclasses[j]);
530 if (floor_setup->data.t1.class_subclasses[j]) {
531 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
533 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
536 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
537 int16_t bits = get_bits(gb, 8) - 1;
539 VALIDATE_INDEX(bits, vc->codebook_count)
540 floor_setup->data.t1.subclass_books[j][k] = bits;
542 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
546 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
547 floor_setup->data.t1.x_list_dim = 2;
549 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
550 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
552 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
553 sizeof(*floor_setup->data.t1.list));
556 rangebits = get_bits(gb, 4);
557 rangemax = (1 << rangebits);
558 if (rangemax > vc->blocksize[1] / 2) {
559 av_log(vc->avccontext, AV_LOG_ERROR,
560 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
561 rangemax, vc->blocksize[1] / 2);
562 return AVERROR_INVALIDDATA;
564 floor_setup->data.t1.list[0].x = 0;
565 floor_setup->data.t1.list[1].x = rangemax;
567 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
568 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
569 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
571 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
572 floor_setup->data.t1.list[floor1_values].x);
576 // Precalculate order of x coordinates - needed for decode
577 if (ff_vorbis_ready_floor1_list(vc->avccontext,
578 floor_setup->data.t1.list,
579 floor_setup->data.t1.x_list_dim)) {
580 return AVERROR_INVALIDDATA;
582 } else if (floor_setup->floor_type == 0) {
583 unsigned max_codebook_dim = 0;
585 floor_setup->decode = vorbis_floor0_decode;
587 floor_setup->data.t0.order = get_bits(gb, 8);
588 floor_setup->data.t0.rate = get_bits(gb, 16);
589 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
590 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
591 /* zero would result in a div by zero later *
593 if (floor_setup->data.t0.amplitude_bits == 0) {
594 av_log(vc->avccontext, AV_LOG_ERROR,
595 "Floor 0 amplitude bits is 0.\n");
596 return AVERROR_INVALIDDATA;
598 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
599 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
601 /* allocate mem for booklist */
602 floor_setup->data.t0.book_list =
603 av_malloc(floor_setup->data.t0.num_books);
604 if (!floor_setup->data.t0.book_list)
605 return AVERROR(ENOMEM);
606 /* read book indexes */
610 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
611 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
612 floor_setup->data.t0.book_list[idx] = book_idx;
613 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
614 max_codebook_dim = vc->codebooks[book_idx].dimensions;
620 /* codebook dim is for padding if codebook dim doesn't *
621 * divide order+1 then we need to read more data */
622 floor_setup->data.t0.lsp =
623 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
624 * sizeof(*floor_setup->data.t0.lsp));
625 if (!floor_setup->data.t0.lsp)
626 return AVERROR(ENOMEM);
628 /* debug output parsed headers */
629 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
630 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
631 av_dlog(NULL, "floor0 bark map size: %u\n",
632 floor_setup->data.t0.bark_map_size);
633 av_dlog(NULL, "floor0 amplitude bits: %u\n",
634 floor_setup->data.t0.amplitude_bits);
635 av_dlog(NULL, "floor0 amplitude offset: %u\n",
636 floor_setup->data.t0.amplitude_offset);
637 av_dlog(NULL, "floor0 number of books: %u\n",
638 floor_setup->data.t0.num_books);
639 av_dlog(NULL, "floor0 book list pointer: %p\n",
640 floor_setup->data.t0.book_list);
643 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
644 av_dlog(NULL, " Book %d: %u\n", idx + 1,
645 floor_setup->data.t0.book_list[idx]);
649 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
650 return AVERROR_INVALIDDATA;
656 // Process residues part
658 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
660 GetBitContext *gb = &vc->gb;
663 vc->residue_count = get_bits(gb, 6)+1;
664 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
666 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
668 for (i = 0; i < vc->residue_count; ++i) {
669 vorbis_residue *res_setup = &vc->residues[i];
671 unsigned high_bits, low_bits;
673 res_setup->type = get_bits(gb, 16);
675 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
677 res_setup->begin = get_bits(gb, 24);
678 res_setup->end = get_bits(gb, 24);
679 res_setup->partition_size = get_bits(gb, 24) + 1;
680 /* Validations to prevent a buffer overflow later. */
681 if (res_setup->begin>res_setup->end ||
682 res_setup->end > (res_setup->type == 2 ? vc->avccontext->channels : 1) * vc->blocksize[1] / 2 ||
683 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
684 av_log(vc->avccontext, AV_LOG_ERROR,
685 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
686 res_setup->type, res_setup->begin, res_setup->end,
687 res_setup->partition_size, vc->blocksize[1] / 2);
688 return AVERROR_INVALIDDATA;
691 res_setup->classifications = get_bits(gb, 6) + 1;
692 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
694 res_setup->ptns_to_read =
695 (res_setup->end - res_setup->begin) / res_setup->partition_size;
696 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
698 sizeof(*res_setup->classifs));
699 if (!res_setup->classifs)
700 return AVERROR(ENOMEM);
702 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
703 res_setup->begin, res_setup->end, res_setup->partition_size,
704 res_setup->classifications, res_setup->classbook);
706 for (j = 0; j < res_setup->classifications; ++j) {
708 low_bits = get_bits(gb, 3);
710 high_bits = get_bits(gb, 5);
711 cascade[j] = (high_bits << 3) + low_bits;
713 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
716 res_setup->maxpass = 0;
717 for (j = 0; j < res_setup->classifications; ++j) {
718 for (k = 0; k < 8; ++k) {
719 if (cascade[j]&(1 << k)) {
720 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
722 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
723 j, k, res_setup->books[j][k]);
725 if (k>res_setup->maxpass)
726 res_setup->maxpass = k;
728 res_setup->books[j][k] = -1;
736 // Process mappings part
738 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
740 GetBitContext *gb = &vc->gb;
743 vc->mapping_count = get_bits(gb, 6)+1;
744 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
746 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
748 for (i = 0; i < vc->mapping_count; ++i) {
749 vorbis_mapping *mapping_setup = &vc->mappings[i];
751 if (get_bits(gb, 16)) {
752 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
753 return AVERROR_INVALIDDATA;
756 mapping_setup->submaps = get_bits(gb, 4) + 1;
758 mapping_setup->submaps = 1;
762 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
763 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
764 sizeof(*mapping_setup->magnitude));
765 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
766 sizeof(*mapping_setup->angle));
767 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
768 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
769 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
772 mapping_setup->coupling_steps = 0;
775 av_dlog(NULL, " %u mapping coupling steps: %d\n",
776 i, mapping_setup->coupling_steps);
778 if (get_bits(gb, 2)) {
779 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
780 return AVERROR_INVALIDDATA; // following spec.
783 if (mapping_setup->submaps>1) {
784 mapping_setup->mux = av_mallocz(vc->audio_channels *
785 sizeof(*mapping_setup->mux));
786 for (j = 0; j < vc->audio_channels; ++j)
787 mapping_setup->mux[j] = get_bits(gb, 4);
790 for (j = 0; j < mapping_setup->submaps; ++j) {
791 skip_bits(gb, 8); // FIXME check?
792 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
793 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
795 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
796 mapping_setup->submap_floor[j],
797 mapping_setup->submap_residue[j]);
803 // Process modes part
805 static void create_map(vorbis_context *vc, unsigned floor_number)
807 vorbis_floor *floors = vc->floors;
813 for (blockflag = 0; blockflag < 2; ++blockflag) {
814 n = vc->blocksize[blockflag] / 2;
815 floors[floor_number].data.t0.map[blockflag] =
816 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
818 map = floors[floor_number].data.t0.map[blockflag];
819 vf = &floors[floor_number].data.t0;
821 for (idx = 0; idx < n; ++idx) {
822 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
823 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
824 if (vf->bark_map_size-1 < map[idx])
825 map[idx] = vf->bark_map_size - 1;
828 vf->map_size[blockflag] = n;
831 for (idx = 0; idx <= n; ++idx) {
832 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
836 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
838 GetBitContext *gb = &vc->gb;
841 vc->mode_count = get_bits(gb, 6) + 1;
842 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
844 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
846 for (i = 0; i < vc->mode_count; ++i) {
847 vorbis_mode *mode_setup = &vc->modes[i];
849 mode_setup->blockflag = get_bits1(gb);
850 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
851 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
852 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
854 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
855 i, mode_setup->blockflag, mode_setup->windowtype,
856 mode_setup->transformtype, mode_setup->mapping);
861 // Process the whole setup header using the functions above
863 static int vorbis_parse_setup_hdr(vorbis_context *vc)
865 GetBitContext *gb = &vc->gb;
868 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
869 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
870 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
872 return AVERROR_INVALIDDATA;
875 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
876 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
879 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
883 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
887 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
891 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
895 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
899 if (!get_bits1(gb)) {
900 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
901 return AVERROR_INVALIDDATA; // framing flag bit unset error
907 // Process the identification header
909 static int vorbis_parse_id_hdr(vorbis_context *vc)
911 GetBitContext *gb = &vc->gb;
914 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
915 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
916 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
917 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
918 return AVERROR_INVALIDDATA;
921 vc->version = get_bits_long(gb, 32); //FIXME check 0
922 vc->audio_channels = get_bits(gb, 8);
923 if (vc->audio_channels <= 0) {
924 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
925 return AVERROR_INVALIDDATA;
927 vc->audio_samplerate = get_bits_long(gb, 32);
928 if (vc->audio_samplerate <= 0) {
929 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
930 return AVERROR_INVALIDDATA;
932 vc->bitrate_maximum = get_bits_long(gb, 32);
933 vc->bitrate_nominal = get_bits_long(gb, 32);
934 vc->bitrate_minimum = get_bits_long(gb, 32);
935 bl0 = get_bits(gb, 4);
936 bl1 = get_bits(gb, 4);
937 vc->blocksize[0] = (1 << bl0);
938 vc->blocksize[1] = (1 << bl1);
939 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
940 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
941 return AVERROR_INVALIDDATA;
943 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
944 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
946 if ((get_bits1(gb)) == 0) {
947 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
948 return AVERROR_INVALIDDATA;
951 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
952 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
953 vc->previous_window = 0;
955 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
956 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
958 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 ",
959 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
962 BLK = vc->blocksize[0];
963 for (i = 0; i < BLK / 2; ++i) {
964 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)));
971 // Process the extradata using the functions above (identification header, setup header)
973 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
975 vorbis_context *vc = avccontext->priv_data;
976 uint8_t *headers = avccontext->extradata;
977 int headers_len = avccontext->extradata_size;
978 uint8_t *header_start[3];
980 GetBitContext *gb = &vc->gb;
983 vc->avccontext = avccontext;
984 ff_vorbisdsp_init(&vc->dsp);
985 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
986 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
988 avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
991 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
992 return AVERROR_INVALIDDATA;
995 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
996 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1000 init_get_bits(gb, header_start[0], header_len[0]*8);
1001 hdr_type = get_bits(gb, 8);
1002 if (hdr_type != 1) {
1003 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1004 return AVERROR_INVALIDDATA;
1006 if ((ret = vorbis_parse_id_hdr(vc))) {
1007 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1012 init_get_bits(gb, header_start[2], header_len[2]*8);
1013 hdr_type = get_bits(gb, 8);
1014 if (hdr_type != 5) {
1015 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1017 return AVERROR_INVALIDDATA;
1019 if ((ret = vorbis_parse_setup_hdr(vc))) {
1020 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1025 if (vc->audio_channels > 8)
1026 avccontext->channel_layout = 0;
1028 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1030 avccontext->channels = vc->audio_channels;
1031 avccontext->sample_rate = vc->audio_samplerate;
1033 avcodec_get_frame_defaults(&vc->frame);
1034 avccontext->coded_frame = &vc->frame;
1039 // Decode audiopackets -------------------------------------------------
1041 // Read and decode floor
1043 static int vorbis_floor0_decode(vorbis_context *vc,
1044 vorbis_floor_data *vfu, float *vec)
1046 vorbis_floor0 *vf = &vfu->t0;
1047 float *lsp = vf->lsp;
1048 unsigned amplitude, book_idx;
1049 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1051 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1052 if (amplitude > 0) {
1054 unsigned idx, lsp_len = 0;
1055 vorbis_codebook codebook;
1057 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1058 if (book_idx >= vf->num_books) {
1059 av_log(vc->avccontext, AV_LOG_ERROR,
1060 "floor0 dec: booknumber too high!\n");
1063 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1064 codebook = vc->codebooks[vf->book_list[book_idx]];
1065 /* Invalid codebook! */
1066 if (!codebook.codevectors)
1067 return AVERROR_INVALIDDATA;
1069 while (lsp_len<vf->order) {
1072 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1073 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1074 /* read temp vector */
1075 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1076 codebook.nb_bits, codebook.maxdepth)
1077 * codebook.dimensions;
1078 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1079 /* copy each vector component and add last to it */
1080 for (idx = 0; idx < codebook.dimensions; ++idx)
1081 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1082 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1084 lsp_len += codebook.dimensions;
1086 /* DEBUG: output lsp coeffs */
1089 for (idx = 0; idx < lsp_len; ++idx)
1090 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1093 /* synthesize floor output vector */
1096 int order = vf->order;
1097 float wstep = M_PI / vf->bark_map_size;
1099 for (i = 0; i < order; i++)
1100 lsp[i] = 2.0f * cos(lsp[i]);
1102 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1103 vf->map_size[blockflag], order, wstep);
1106 while (i < vf->map_size[blockflag]) {
1107 int j, iter_cond = vf->map[blockflag][i];
1110 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1112 /* similar part for the q and p products */
1113 for (j = 0; j + 1 < order; j += 2) {
1114 q *= lsp[j] - two_cos_w;
1115 p *= lsp[j + 1] - two_cos_w;
1117 if (j == order) { // even order
1118 p *= p * (2.0f - two_cos_w);
1119 q *= q * (2.0f + two_cos_w);
1120 } else { // odd order
1121 q *= two_cos_w-lsp[j]; // one more time for q
1123 /* final step and square */
1124 p *= p * (4.f - two_cos_w * two_cos_w);
1128 /* calculate linear floor value */
1129 q = exp((((amplitude*vf->amplitude_offset) /
1130 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1131 - vf->amplitude_offset) * .11512925f);
1136 } while (vf->map[blockflag][i] == iter_cond);
1140 /* this channel is unused */
1144 av_dlog(NULL, " Floor0 decoded\n");
1149 static int vorbis_floor1_decode(vorbis_context *vc,
1150 vorbis_floor_data *vfu, float *vec)
1152 vorbis_floor1 *vf = &vfu->t1;
1153 GetBitContext *gb = &vc->gb;
1154 uint16_t range_v[4] = { 256, 128, 86, 64 };
1155 unsigned range = range_v[vf->multiplier - 1];
1156 uint16_t floor1_Y[258];
1157 uint16_t floor1_Y_final[258];
1158 int floor1_flag[258];
1159 unsigned class, cdim, cbits, csub, cval, offset, i, j;
1160 int book, adx, ady, dy, off, predicted, err;
1163 if (!get_bits1(gb)) // silence
1166 // Read values (or differences) for the floor's points
1168 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1169 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1171 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1174 for (i = 0; i < vf->partitions; ++i) {
1175 class = vf->partition_class[i];
1176 cdim = vf->class_dimensions[class];
1177 cbits = vf->class_subclasses[class];
1178 csub = (1 << cbits) - 1;
1181 av_dlog(NULL, "Cbits %u\n", cbits);
1183 if (cbits) // this reads all subclasses for this partition's class
1184 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class]].vlc.table,
1185 vc->codebooks[vf->class_masterbook[class]].nb_bits, 3);
1187 for (j = 0; j < cdim; ++j) {
1188 book = vf->subclass_books[class][cval & csub];
1190 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1191 book, cbits, cval, get_bits_count(gb));
1193 cval = cval >> cbits;
1195 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1196 vc->codebooks[book].nb_bits, 3);
1198 floor1_Y[offset+j] = 0;
1201 av_dlog(NULL, " floor(%d) = %d \n",
1202 vf->list[offset+j].x, floor1_Y[offset+j]);
1207 // Amplitude calculation from the differences
1211 floor1_Y_final[0] = floor1_Y[0];
1212 floor1_Y_final[1] = floor1_Y[1];
1214 for (i = 2; i < vf->x_list_dim; ++i) {
1215 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1217 low_neigh_offs = vf->list[i].low;
1218 high_neigh_offs = vf->list[i].high;
1219 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1220 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1222 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1225 predicted = floor1_Y_final[low_neigh_offs] - off;
1227 predicted = floor1_Y_final[low_neigh_offs] + off;
1228 } // render_point end
1231 highroom = range-predicted;
1232 lowroom = predicted;
1233 if (highroom < lowroom) {
1234 room = highroom * 2;
1236 room = lowroom * 2; // SPEC misspelling
1239 floor1_flag[low_neigh_offs] = 1;
1240 floor1_flag[high_neigh_offs] = 1;
1243 if (highroom > lowroom) {
1244 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1246 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1250 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1252 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1257 floor1_Y_final[i] = av_clip_uint16(predicted);
1260 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1261 vf->list[i].x, floor1_Y_final[i], val);
1264 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1266 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1268 av_dlog(NULL, " Floor decoded\n");
1273 // Read and decode residue
1275 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1278 uint8_t *do_not_decode,
1284 GetBitContext *gb = &vc->gb;
1285 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1286 unsigned ptns_to_read = vr->ptns_to_read;
1287 uint8_t *classifs = vr->classifs;
1288 unsigned pass, ch_used, i, j, k, l;
1289 unsigned max_output = (ch - 1) * vlen;
1292 for (j = 1; j < ch; ++j)
1293 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1294 if (do_not_decode[0])
1297 max_output += vr->end / ch;
1300 max_output += vr->end;
1303 if (max_output > ch_left * vlen) {
1304 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1308 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1310 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1311 uint16_t voffset, partition_count, j_times_ptns_to_read;
1313 voffset = vr->begin;
1314 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1316 unsigned inverse_class = ff_inverse[vr->classifications];
1317 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1318 if (!do_not_decode[j]) {
1319 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1320 vc->codebooks[vr->classbook].nb_bits, 3);
1322 av_dlog(NULL, "Classword: %u\n", temp);
1324 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1325 for (i = 0; i < c_p_c; ++i) {
1328 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1329 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1330 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1334 j_times_ptns_to_read += ptns_to_read;
1337 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1338 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1341 if (!do_not_decode[j]) {
1342 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1343 int vqbook = vr->books[vqclass][pass];
1345 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1347 unsigned dim = vc->codebooks[vqbook].dimensions;
1348 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1349 vorbis_codebook codebook = vc->codebooks[vqbook];
1353 voffs = voffset+j*vlen;
1354 for (k = 0; k < step; ++k) {
1355 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1356 for (l = 0; l < dim; ++l)
1357 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1359 } else if (vr_type == 1) {
1360 voffs = voffset + j * vlen;
1361 for (k = 0; k < step; ++k) {
1362 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1363 for (l = 0; l < dim; ++l, ++voffs) {
1364 vec[voffs]+=codebook.codevectors[coffs+l];
1366 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1367 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1370 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1371 voffs = voffset >> 1;
1374 for (k = 0; k < step; ++k) {
1375 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1376 vec[voffs + k ] += codebook.codevectors[coffs ];
1377 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1379 } else if (dim == 4) {
1380 for (k = 0; k < step; ++k, voffs += 2) {
1381 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1382 vec[voffs ] += codebook.codevectors[coffs ];
1383 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1384 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1385 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1388 for (k = 0; k < step; ++k) {
1389 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1390 for (l = 0; l < dim; l += 2, voffs++) {
1391 vec[voffs ] += codebook.codevectors[coffs + l ];
1392 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1394 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1395 pass, voffset / ch + (voffs % ch) * vlen,
1396 vec[voffset / ch + (voffs % ch) * vlen],
1397 codebook.codevectors[coffs + l], coffs, l);
1401 } else if (vr_type == 2) {
1402 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1403 unsigned voffs_mod = voffset - voffs_div * ch;
1405 for (k = 0; k < step; ++k) {
1406 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1407 for (l = 0; l < dim; ++l) {
1408 vec[voffs_div + voffs_mod * vlen] +=
1409 codebook.codevectors[coffs + l];
1411 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1412 pass, voffs_div + voffs_mod * vlen,
1413 vec[voffs_div + voffs_mod * vlen],
1414 codebook.codevectors[coffs + l], coffs, l);
1416 if (++voffs_mod == ch) {
1425 j_times_ptns_to_read += ptns_to_read;
1428 voffset += vr->partition_size;
1435 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1437 uint8_t *do_not_decode,
1438 float *vec, unsigned vlen,
1442 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1443 else if (vr->type == 1)
1444 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1445 else if (vr->type == 0)
1446 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1448 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1449 return AVERROR_INVALIDDATA;
1453 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1456 for (i = 0; i < blocksize; i++) {
1459 ang[i] = mag[i] - ang[i];
1461 float temp = ang[i];
1469 float temp = ang[i];
1477 // Decode the audio packet using the functions above
1479 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1481 GetBitContext *gb = &vc->gb;
1483 unsigned previous_window = vc->previous_window;
1484 unsigned mode_number, blockflag, blocksize;
1486 uint8_t no_residue[255];
1487 uint8_t do_not_decode[255];
1488 vorbis_mapping *mapping;
1489 float *ch_res_ptr = vc->channel_residues;
1490 uint8_t res_chan[255];
1491 unsigned res_num = 0;
1493 unsigned ch_left = vc->audio_channels;
1496 if (get_bits1(gb)) {
1497 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1498 return AVERROR_INVALIDDATA; // packet type not audio
1501 if (vc->mode_count == 1) {
1504 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1506 vc->mode_number = mode_number;
1507 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1509 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1510 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1512 blockflag = vc->modes[mode_number].blockflag;
1513 blocksize = vc->blocksize[blockflag];
1514 vlen = blocksize / 2;
1516 previous_window = get_bits(gb, 1);
1517 skip_bits1(gb); // next_window
1520 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1521 for (i = 0; i < vc->audio_channels; ++i)
1522 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1526 for (i = 0; i < vc->audio_channels; ++i) {
1527 vorbis_floor *floor;
1529 if (mapping->submaps > 1) {
1530 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1532 floor = &vc->floors[mapping->submap_floor[0]];
1535 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1538 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1539 return AVERROR_INVALIDDATA;
1541 no_residue[i] = ret;
1544 // Nonzero vector propagate
1546 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1547 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1548 no_residue[mapping->magnitude[i]] = 0;
1549 no_residue[mapping->angle[i]] = 0;
1555 for (i = 0; i < mapping->submaps; ++i) {
1556 vorbis_residue *residue;
1560 for (j = 0; j < vc->audio_channels; ++j) {
1561 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1562 res_chan[j] = res_num;
1563 if (no_residue[j]) {
1564 do_not_decode[ch] = 1;
1566 do_not_decode[ch] = 0;
1572 residue = &vc->residues[mapping->submap_residue[i]];
1574 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1578 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1583 ch_res_ptr += ch * vlen;
1588 return AVERROR_INVALIDDATA;
1592 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1595 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1596 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1597 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1602 mdct = &vc->mdct[blockflag];
1604 for (j = vc->audio_channels-1;j >= 0; j--) {
1605 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1606 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1607 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1610 // Overlap/add, save data for next overlapping
1612 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1613 for (j = 0; j < vc->audio_channels; j++) {
1614 unsigned bs0 = vc->blocksize[0];
1615 unsigned bs1 = vc->blocksize[1];
1616 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1617 float *saved = vc->saved + j * bs1 / 4;
1618 float *ret = floor_ptr[j];
1619 float *buf = residue;
1620 const float *win = vc->win[blockflag & previous_window];
1622 if (blockflag == previous_window) {
1623 vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1624 } else if (blockflag > previous_window) {
1625 vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1626 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1628 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1629 vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1631 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1634 vc->previous_window = blockflag;
1638 // Return the decoded audio packet through the standard api
1640 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1641 int *got_frame_ptr, AVPacket *avpkt)
1643 const uint8_t *buf = avpkt->data;
1644 int buf_size = avpkt->size;
1645 vorbis_context *vc = avccontext->priv_data;
1646 GetBitContext *gb = &vc->gb;
1647 float *channel_ptrs[255];
1650 av_dlog(NULL, "packet length %d \n", buf_size);
1652 /* get output buffer */
1653 vc->frame.nb_samples = vc->blocksize[1] / 2;
1654 if ((ret = ff_get_buffer(avccontext, &vc->frame)) < 0) {
1655 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1659 if (vc->audio_channels > 8) {
1660 for (i = 0; i < vc->audio_channels; i++)
1661 channel_ptrs[i] = (float *)vc->frame.extended_data[i];
1663 for (i = 0; i < vc->audio_channels; i++) {
1664 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1665 channel_ptrs[ch] = (float *)vc->frame.extended_data[i];
1669 init_get_bits(gb, buf, buf_size*8);
1671 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1674 if (!vc->first_frame) {
1675 vc->first_frame = 1;
1680 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1681 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1683 vc->frame.nb_samples = len;
1685 *(AVFrame *)data = vc->frame;
1692 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1694 vorbis_context *vc = avccontext->priv_data;
1701 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1703 vorbis_context *vc = avccontext->priv_data;
1706 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1707 sizeof(*vc->saved));
1709 vc->previous_window = 0;
1712 AVCodec ff_vorbis_decoder = {
1714 .type = AVMEDIA_TYPE_AUDIO,
1715 .id = AV_CODEC_ID_VORBIS,
1716 .priv_data_size = sizeof(vorbis_context),
1717 .init = vorbis_decode_init,
1718 .close = vorbis_decode_close,
1719 .decode = vorbis_decode_frame,
1720 .flush = vorbis_decode_flush,
1721 .capabilities = CODEC_CAP_DR1,
1722 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1723 .channel_layouts = ff_vorbis_channel_layouts,
1724 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1725 AV_SAMPLE_FMT_NONE },