4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
38 #include "fmtconvert.h"
42 #include "vorbisdsp.h"
47 #define V_MAX_VLCS (1 << 16)
48 #define V_MAX_PARTITIONS (1 << 20)
59 typedef union vorbis_floor_u vorbis_floor_data;
60 typedef struct vorbis_floor0_s vorbis_floor0;
61 typedef struct vorbis_floor1_s vorbis_floor1;
62 struct vorbis_context_s;
64 int (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
73 uint16_t bark_map_size;
76 uint8_t amplitude_bits;
77 uint8_t amplitude_offset;
82 struct vorbis_floor1_s {
84 uint8_t partition_class[32];
85 uint8_t class_dimensions[16];
86 uint8_t class_subclasses[16];
87 uint8_t class_masterbook[16];
88 int16_t subclass_books[16][8];
91 vorbis_floor1_entry *list;
100 unsigned partition_size;
101 uint8_t classifications;
103 int16_t books[64][8];
105 uint16_t ptns_to_read;
111 uint16_t coupling_steps;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
122 uint16_t transformtype;
126 typedef struct vorbis_context_s {
127 AVCodecContext *avccontext;
129 VorbisDSPContext dsp;
130 AVFloatDSPContext fdsp;
131 FmtConvertContext fmt_conv;
136 uint8_t audio_channels;
137 uint32_t audio_samplerate;
138 uint32_t bitrate_maximum;
139 uint32_t bitrate_nominal;
140 uint32_t bitrate_minimum;
141 uint32_t blocksize[2];
143 uint16_t codebook_count;
144 vorbis_codebook *codebooks;
146 vorbis_floor *floors;
147 uint8_t residue_count;
148 vorbis_residue *residues;
149 uint8_t mapping_count;
150 vorbis_mapping *mappings;
153 uint8_t mode_number; // mode number for the current packet
154 uint8_t previous_window;
155 float *channel_residues;
159 /* Helper functions */
162 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
164 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
165 #define VALIDATE_INDEX(idx, limit) \
167 av_log(vc->avccontext, AV_LOG_ERROR,\
169 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
170 return AVERROR_INVALIDDATA;\
172 #define GET_VALIDATED_INDEX(idx, bits, limit) \
174 idx = get_bits(gb, bits);\
175 VALIDATE_INDEX(idx, limit)\
178 static float vorbisfloat2float(unsigned val)
180 double mant = val & 0x1fffff;
181 long exp = (val & 0x7fe00000L) >> 21;
182 if (val & 0x80000000)
184 return ldexp(mant, exp - 20 - 768);
188 // Free all allocated memory -----------------------------------------
190 static void vorbis_free(vorbis_context *vc)
194 av_freep(&vc->channel_residues);
195 av_freep(&vc->saved);
198 for (i = 0; i < vc->residue_count; i++)
199 av_free(vc->residues[i].classifs);
200 av_freep(&vc->residues);
201 av_freep(&vc->modes);
203 ff_mdct_end(&vc->mdct[0]);
204 ff_mdct_end(&vc->mdct[1]);
207 for (i = 0; i < vc->codebook_count; ++i) {
208 av_free(vc->codebooks[i].codevectors);
209 ff_free_vlc(&vc->codebooks[i].vlc);
211 av_freep(&vc->codebooks);
214 for (i = 0; i < vc->floor_count; ++i) {
215 if (vc->floors[i].floor_type == 0) {
216 av_free(vc->floors[i].data.t0.map[0]);
217 av_free(vc->floors[i].data.t0.map[1]);
218 av_free(vc->floors[i].data.t0.book_list);
219 av_free(vc->floors[i].data.t0.lsp);
221 av_free(vc->floors[i].data.t1.list);
224 av_freep(&vc->floors);
227 for (i = 0; i < vc->mapping_count; ++i) {
228 av_free(vc->mappings[i].magnitude);
229 av_free(vc->mappings[i].angle);
230 av_free(vc->mappings[i].mux);
232 av_freep(&vc->mappings);
235 // Parse setup header -------------------------------------------------
237 // Process codebooks part
239 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
242 uint8_t *tmp_vlc_bits;
243 uint32_t *tmp_vlc_codes;
244 GetBitContext *gb = &vc->gb;
245 uint16_t *codebook_multiplicands;
248 vc->codebook_count = get_bits(gb, 8) + 1;
250 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
252 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
253 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
254 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
255 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
257 for (cb = 0; cb < vc->codebook_count; ++cb) {
258 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
259 unsigned ordered, t, entries, used_entries = 0;
261 av_dlog(NULL, " %u. Codebook\n", cb);
263 if (get_bits(gb, 24) != 0x564342) {
264 av_log(vc->avccontext, AV_LOG_ERROR,
265 " %u. Codebook setup data corrupt.\n", cb);
266 ret = AVERROR_INVALIDDATA;
270 codebook_setup->dimensions=get_bits(gb, 16);
271 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
272 av_log(vc->avccontext, AV_LOG_ERROR,
273 " %u. Codebook's dimension is invalid (%d).\n",
274 cb, codebook_setup->dimensions);
275 ret = AVERROR_INVALIDDATA;
278 entries = get_bits(gb, 24);
279 if (entries > V_MAX_VLCS) {
280 av_log(vc->avccontext, AV_LOG_ERROR,
281 " %u. Codebook has too many entries (%u).\n",
283 ret = AVERROR_INVALIDDATA;
287 ordered = get_bits1(gb);
289 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
290 codebook_setup->dimensions, entries);
294 unsigned sparse = get_bits1(gb);
296 av_dlog(NULL, " not ordered \n");
299 av_dlog(NULL, " sparse \n");
302 for (ce = 0; ce < entries; ++ce) {
303 flag = get_bits1(gb);
305 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
308 tmp_vlc_bits[ce] = 0;
311 av_dlog(NULL, " not sparse \n");
313 used_entries = entries;
314 for (ce = 0; ce < entries; ++ce)
315 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
318 unsigned current_entry = 0;
319 unsigned current_length = get_bits(gb, 5) + 1;
321 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
323 used_entries = entries;
324 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
327 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
329 number = get_bits(gb, ilog(entries - current_entry));
331 av_dlog(NULL, " number: %u\n", number);
333 for (i = current_entry; i < number+current_entry; ++i)
334 if (i < used_entries)
335 tmp_vlc_bits[i] = current_length;
337 current_entry+=number;
339 if (current_entry>used_entries) {
340 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
341 ret = AVERROR_INVALIDDATA;
346 codebook_setup->lookup_type = get_bits(gb, 4);
348 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
349 codebook_setup->lookup_type ? "vq" : "no lookup");
351 // If the codebook is used for (inverse) VQ, calculate codevectors.
353 if (codebook_setup->lookup_type == 1) {
355 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
357 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
358 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
359 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
360 unsigned codebook_sequence_p = get_bits1(gb);
362 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
363 codebook_lookup_values);
364 av_dlog(NULL, " delta %f minmum %f \n",
365 codebook_delta_value, codebook_minimum_value);
367 for (i = 0; i < codebook_lookup_values; ++i) {
368 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
370 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
371 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
372 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
375 // Weed out unused vlcs and build codevector vector
376 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
377 codebook_setup->dimensions *
378 sizeof(*codebook_setup->codevectors))
380 for (j = 0, i = 0; i < entries; ++i) {
381 unsigned dim = codebook_setup->dimensions;
383 if (tmp_vlc_bits[i]) {
385 unsigned lookup_offset = i;
387 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
389 for (k = 0; k < dim; ++k) {
390 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
391 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
392 if (codebook_sequence_p)
393 last = codebook_setup->codevectors[j * dim + k];
394 lookup_offset/=codebook_lookup_values;
396 tmp_vlc_bits[j] = tmp_vlc_bits[i];
398 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
399 for (k = 0; k < dim; ++k)
400 av_dlog(vc->avccontext, " %f ",
401 codebook_setup->codevectors[j * dim + k]);
402 av_dlog(vc->avccontext, "\n");
407 if (j != used_entries) {
408 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
409 ret = AVERROR_INVALIDDATA;
412 entries = used_entries;
413 } else if (codebook_setup->lookup_type >= 2) {
414 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
415 ret = AVERROR_INVALIDDATA;
419 // Initialize VLC table
420 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
421 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
422 ret = AVERROR_INVALIDDATA;
425 codebook_setup->maxdepth = 0;
426 for (t = 0; t < entries; ++t)
427 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
428 codebook_setup->maxdepth = tmp_vlc_bits[t];
430 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
431 codebook_setup->nb_bits = V_NB_BITS2;
433 codebook_setup->nb_bits = V_NB_BITS;
435 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
437 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
438 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
439 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
440 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
442 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
447 av_free(tmp_vlc_bits);
448 av_free(tmp_vlc_codes);
449 av_free(codebook_multiplicands);
454 av_free(tmp_vlc_bits);
455 av_free(tmp_vlc_codes);
456 av_free(codebook_multiplicands);
460 // Process time domain transforms part (unused in Vorbis I)
462 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
464 GetBitContext *gb = &vc->gb;
465 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
467 for (i = 0; i < vorbis_time_count; ++i) {
468 unsigned vorbis_tdtransform = get_bits(gb, 16);
470 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
471 vorbis_time_count, vorbis_tdtransform);
473 if (vorbis_tdtransform) {
474 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
475 return AVERROR_INVALIDDATA;
481 // Process floors part
483 static int vorbis_floor0_decode(vorbis_context *vc,
484 vorbis_floor_data *vfu, float *vec);
485 static void create_map(vorbis_context *vc, unsigned floor_number);
486 static int vorbis_floor1_decode(vorbis_context *vc,
487 vorbis_floor_data *vfu, float *vec);
488 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
490 GetBitContext *gb = &vc->gb;
493 vc->floor_count = get_bits(gb, 6) + 1;
495 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
497 for (i = 0; i < vc->floor_count; ++i) {
498 vorbis_floor *floor_setup = &vc->floors[i];
500 floor_setup->floor_type = get_bits(gb, 16);
502 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
504 if (floor_setup->floor_type == 1) {
505 int maximum_class = -1;
506 unsigned rangebits, rangemax, floor1_values = 2;
508 floor_setup->decode = vorbis_floor1_decode;
510 floor_setup->data.t1.partitions = get_bits(gb, 5);
512 av_dlog(NULL, " %d.floor: %d partitions \n",
513 i, floor_setup->data.t1.partitions);
515 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
516 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
517 if (floor_setup->data.t1.partition_class[j] > maximum_class)
518 maximum_class = floor_setup->data.t1.partition_class[j];
520 av_dlog(NULL, " %d. floor %d partition class %d \n",
521 i, j, floor_setup->data.t1.partition_class[j]);
525 av_dlog(NULL, " maximum class %d \n", maximum_class);
527 for (j = 0; j <= maximum_class; ++j) {
528 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
529 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
531 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
532 floor_setup->data.t1.class_dimensions[j],
533 floor_setup->data.t1.class_subclasses[j]);
535 if (floor_setup->data.t1.class_subclasses[j]) {
536 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
538 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
541 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
542 int16_t bits = get_bits(gb, 8) - 1;
544 VALIDATE_INDEX(bits, vc->codebook_count)
545 floor_setup->data.t1.subclass_books[j][k] = bits;
547 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
551 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
552 floor_setup->data.t1.x_list_dim = 2;
554 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
555 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
557 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
558 sizeof(*floor_setup->data.t1.list));
561 rangebits = get_bits(gb, 4);
562 rangemax = (1 << rangebits);
563 if (rangemax > vc->blocksize[1] / 2) {
564 av_log(vc->avccontext, AV_LOG_ERROR,
565 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
566 rangemax, vc->blocksize[1] / 2);
567 return AVERROR_INVALIDDATA;
569 floor_setup->data.t1.list[0].x = 0;
570 floor_setup->data.t1.list[1].x = rangemax;
572 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
573 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
574 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
576 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
577 floor_setup->data.t1.list[floor1_values].x);
581 // Precalculate order of x coordinates - needed for decode
582 if (ff_vorbis_ready_floor1_list(vc->avccontext,
583 floor_setup->data.t1.list,
584 floor_setup->data.t1.x_list_dim)) {
585 return AVERROR_INVALIDDATA;
587 } else if (floor_setup->floor_type == 0) {
588 unsigned max_codebook_dim = 0;
590 floor_setup->decode = vorbis_floor0_decode;
592 floor_setup->data.t0.order = get_bits(gb, 8);
593 floor_setup->data.t0.rate = get_bits(gb, 16);
594 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
595 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
596 /* zero would result in a div by zero later *
598 if (floor_setup->data.t0.amplitude_bits == 0) {
599 av_log(vc->avccontext, AV_LOG_ERROR,
600 "Floor 0 amplitude bits is 0.\n");
601 return AVERROR_INVALIDDATA;
603 if (floor_setup->data.t0.bark_map_size == 0) {
604 av_log(vc->avccontext, AV_LOG_ERROR, "Floor 0 bark map size is 0.\n");
605 return AVERROR_INVALIDDATA;
607 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
608 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
610 /* allocate mem for booklist */
611 floor_setup->data.t0.book_list =
612 av_malloc(floor_setup->data.t0.num_books);
613 if (!floor_setup->data.t0.book_list)
614 return AVERROR(ENOMEM);
615 /* read book indexes */
619 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
620 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
621 floor_setup->data.t0.book_list[idx] = book_idx;
622 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
623 max_codebook_dim = vc->codebooks[book_idx].dimensions;
629 /* codebook dim is for padding if codebook dim doesn't *
630 * divide order+1 then we need to read more data */
631 floor_setup->data.t0.lsp =
632 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
633 * sizeof(*floor_setup->data.t0.lsp));
634 if (!floor_setup->data.t0.lsp)
635 return AVERROR(ENOMEM);
637 /* debug output parsed headers */
638 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
639 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
640 av_dlog(NULL, "floor0 bark map size: %u\n",
641 floor_setup->data.t0.bark_map_size);
642 av_dlog(NULL, "floor0 amplitude bits: %u\n",
643 floor_setup->data.t0.amplitude_bits);
644 av_dlog(NULL, "floor0 amplitude offset: %u\n",
645 floor_setup->data.t0.amplitude_offset);
646 av_dlog(NULL, "floor0 number of books: %u\n",
647 floor_setup->data.t0.num_books);
648 av_dlog(NULL, "floor0 book list pointer: %p\n",
649 floor_setup->data.t0.book_list);
652 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
653 av_dlog(NULL, " Book %d: %u\n", idx + 1,
654 floor_setup->data.t0.book_list[idx]);
658 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
659 return AVERROR_INVALIDDATA;
665 // Process residues part
667 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
669 GetBitContext *gb = &vc->gb;
672 vc->residue_count = get_bits(gb, 6)+1;
673 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
675 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
677 for (i = 0; i < vc->residue_count; ++i) {
678 vorbis_residue *res_setup = &vc->residues[i];
680 unsigned high_bits, low_bits;
682 res_setup->type = get_bits(gb, 16);
684 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
686 res_setup->begin = get_bits(gb, 24);
687 res_setup->end = get_bits(gb, 24);
688 res_setup->partition_size = get_bits(gb, 24) + 1;
689 /* Validations to prevent a buffer overflow later. */
690 if (res_setup->begin>res_setup->end ||
691 res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
692 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
693 av_log(vc->avccontext, AV_LOG_ERROR,
694 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
695 res_setup->type, res_setup->begin, res_setup->end,
696 res_setup->partition_size, vc->blocksize[1] / 2);
697 return AVERROR_INVALIDDATA;
700 res_setup->classifications = get_bits(gb, 6) + 1;
701 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
703 res_setup->ptns_to_read =
704 (res_setup->end - res_setup->begin) / res_setup->partition_size;
705 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
707 sizeof(*res_setup->classifs));
708 if (!res_setup->classifs)
709 return AVERROR(ENOMEM);
711 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
712 res_setup->begin, res_setup->end, res_setup->partition_size,
713 res_setup->classifications, res_setup->classbook);
715 for (j = 0; j < res_setup->classifications; ++j) {
717 low_bits = get_bits(gb, 3);
719 high_bits = get_bits(gb, 5);
720 cascade[j] = (high_bits << 3) + low_bits;
722 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
725 res_setup->maxpass = 0;
726 for (j = 0; j < res_setup->classifications; ++j) {
727 for (k = 0; k < 8; ++k) {
728 if (cascade[j]&(1 << k)) {
729 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
731 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
732 j, k, res_setup->books[j][k]);
734 if (k>res_setup->maxpass)
735 res_setup->maxpass = k;
737 res_setup->books[j][k] = -1;
745 // Process mappings part
747 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
749 GetBitContext *gb = &vc->gb;
752 vc->mapping_count = get_bits(gb, 6)+1;
753 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
755 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
757 for (i = 0; i < vc->mapping_count; ++i) {
758 vorbis_mapping *mapping_setup = &vc->mappings[i];
760 if (get_bits(gb, 16)) {
761 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
762 return AVERROR_INVALIDDATA;
765 mapping_setup->submaps = get_bits(gb, 4) + 1;
767 mapping_setup->submaps = 1;
771 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
772 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
773 sizeof(*mapping_setup->magnitude));
774 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
775 sizeof(*mapping_setup->angle));
776 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
777 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
778 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
781 mapping_setup->coupling_steps = 0;
784 av_dlog(NULL, " %u mapping coupling steps: %d\n",
785 i, mapping_setup->coupling_steps);
787 if (get_bits(gb, 2)) {
788 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
789 return AVERROR_INVALIDDATA; // following spec.
792 if (mapping_setup->submaps>1) {
793 mapping_setup->mux = av_mallocz(vc->audio_channels *
794 sizeof(*mapping_setup->mux));
795 for (j = 0; j < vc->audio_channels; ++j)
796 mapping_setup->mux[j] = get_bits(gb, 4);
799 for (j = 0; j < mapping_setup->submaps; ++j) {
800 skip_bits(gb, 8); // FIXME check?
801 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
802 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
804 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
805 mapping_setup->submap_floor[j],
806 mapping_setup->submap_residue[j]);
812 // Process modes part
814 static void create_map(vorbis_context *vc, unsigned floor_number)
816 vorbis_floor *floors = vc->floors;
822 for (blockflag = 0; blockflag < 2; ++blockflag) {
823 n = vc->blocksize[blockflag] / 2;
824 floors[floor_number].data.t0.map[blockflag] =
825 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
827 map = floors[floor_number].data.t0.map[blockflag];
828 vf = &floors[floor_number].data.t0;
830 for (idx = 0; idx < n; ++idx) {
831 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
832 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
833 if (vf->bark_map_size-1 < map[idx])
834 map[idx] = vf->bark_map_size - 1;
837 vf->map_size[blockflag] = n;
840 for (idx = 0; idx <= n; ++idx) {
841 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
845 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
847 GetBitContext *gb = &vc->gb;
850 vc->mode_count = get_bits(gb, 6) + 1;
851 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
853 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
855 for (i = 0; i < vc->mode_count; ++i) {
856 vorbis_mode *mode_setup = &vc->modes[i];
858 mode_setup->blockflag = get_bits1(gb);
859 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
860 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
861 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
863 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
864 i, mode_setup->blockflag, mode_setup->windowtype,
865 mode_setup->transformtype, mode_setup->mapping);
870 // Process the whole setup header using the functions above
872 static int vorbis_parse_setup_hdr(vorbis_context *vc)
874 GetBitContext *gb = &vc->gb;
877 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
878 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
879 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
881 return AVERROR_INVALIDDATA;
884 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
885 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
888 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
889 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
892 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
893 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
896 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
897 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
900 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
901 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
904 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
905 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
908 if (!get_bits1(gb)) {
909 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
910 return AVERROR_INVALIDDATA; // framing flag bit unset error
916 // Process the identification header
918 static int vorbis_parse_id_hdr(vorbis_context *vc)
920 GetBitContext *gb = &vc->gb;
923 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
924 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
925 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
926 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
927 return AVERROR_INVALIDDATA;
930 vc->version = get_bits_long(gb, 32); //FIXME check 0
931 vc->audio_channels = get_bits(gb, 8);
932 if (vc->audio_channels <= 0) {
933 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
934 return AVERROR_INVALIDDATA;
936 vc->audio_samplerate = get_bits_long(gb, 32);
937 if (vc->audio_samplerate <= 0) {
938 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
939 return AVERROR_INVALIDDATA;
941 vc->bitrate_maximum = get_bits_long(gb, 32);
942 vc->bitrate_nominal = get_bits_long(gb, 32);
943 vc->bitrate_minimum = get_bits_long(gb, 32);
944 bl0 = get_bits(gb, 4);
945 bl1 = get_bits(gb, 4);
946 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
947 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
948 return AVERROR_INVALIDDATA;
950 vc->blocksize[0] = (1 << bl0);
951 vc->blocksize[1] = (1 << bl1);
952 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
953 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
955 if ((get_bits1(gb)) == 0) {
956 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
957 return AVERROR_INVALIDDATA;
960 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
961 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
962 vc->previous_window = 0;
964 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
965 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
967 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 ",
968 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
971 BLK = vc->blocksize[0];
972 for (i = 0; i < BLK / 2; ++i) {
973 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)));
980 // Process the extradata using the functions above (identification header, setup header)
982 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
984 vorbis_context *vc = avccontext->priv_data;
985 uint8_t *headers = avccontext->extradata;
986 int headers_len = avccontext->extradata_size;
987 uint8_t *header_start[3];
989 GetBitContext *gb = &vc->gb;
992 vc->avccontext = avccontext;
993 ff_vorbisdsp_init(&vc->dsp);
994 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
995 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
997 avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
1000 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
1001 return AVERROR_INVALIDDATA;
1004 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1005 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1009 init_get_bits(gb, header_start[0], header_len[0]*8);
1010 hdr_type = get_bits(gb, 8);
1011 if (hdr_type != 1) {
1012 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1013 return AVERROR_INVALIDDATA;
1015 if ((ret = vorbis_parse_id_hdr(vc))) {
1016 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1021 init_get_bits(gb, header_start[2], header_len[2]*8);
1022 hdr_type = get_bits(gb, 8);
1023 if (hdr_type != 5) {
1024 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1026 return AVERROR_INVALIDDATA;
1028 if ((ret = vorbis_parse_setup_hdr(vc))) {
1029 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1034 if (vc->audio_channels > 8)
1035 avccontext->channel_layout = 0;
1037 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1039 avccontext->channels = vc->audio_channels;
1040 avccontext->sample_rate = vc->audio_samplerate;
1045 // Decode audiopackets -------------------------------------------------
1047 // Read and decode floor
1049 static int vorbis_floor0_decode(vorbis_context *vc,
1050 vorbis_floor_data *vfu, float *vec)
1052 vorbis_floor0 *vf = &vfu->t0;
1053 float *lsp = vf->lsp;
1054 unsigned amplitude, book_idx;
1055 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1057 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1058 if (amplitude > 0) {
1060 unsigned idx, lsp_len = 0;
1061 vorbis_codebook codebook;
1063 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1064 if (book_idx >= vf->num_books) {
1065 av_log(vc->avccontext, AV_LOG_ERROR,
1066 "floor0 dec: booknumber too high!\n");
1069 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1070 codebook = vc->codebooks[vf->book_list[book_idx]];
1071 /* Invalid codebook! */
1072 if (!codebook.codevectors)
1073 return AVERROR_INVALIDDATA;
1075 while (lsp_len<vf->order) {
1078 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1079 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1080 /* read temp vector */
1081 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1082 codebook.nb_bits, codebook.maxdepth)
1083 * codebook.dimensions;
1084 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1085 /* copy each vector component and add last to it */
1086 for (idx = 0; idx < codebook.dimensions; ++idx)
1087 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1088 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1090 lsp_len += codebook.dimensions;
1092 /* DEBUG: output lsp coeffs */
1095 for (idx = 0; idx < lsp_len; ++idx)
1096 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1099 /* synthesize floor output vector */
1102 int order = vf->order;
1103 float wstep = M_PI / vf->bark_map_size;
1105 for (i = 0; i < order; i++)
1106 lsp[i] = 2.0f * cos(lsp[i]);
1108 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1109 vf->map_size[blockflag], order, wstep);
1112 while (i < vf->map_size[blockflag]) {
1113 int j, iter_cond = vf->map[blockflag][i];
1116 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1118 /* similar part for the q and p products */
1119 for (j = 0; j + 1 < order; j += 2) {
1120 q *= lsp[j] - two_cos_w;
1121 p *= lsp[j + 1] - two_cos_w;
1123 if (j == order) { // even order
1124 p *= p * (2.0f - two_cos_w);
1125 q *= q * (2.0f + two_cos_w);
1126 } else { // odd order
1127 q *= two_cos_w-lsp[j]; // one more time for q
1129 /* final step and square */
1130 p *= p * (4.f - two_cos_w * two_cos_w);
1134 /* calculate linear floor value */
1135 q = exp((((amplitude*vf->amplitude_offset) /
1136 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1137 - vf->amplitude_offset) * .11512925f);
1142 } while (vf->map[blockflag][i] == iter_cond);
1146 /* this channel is unused */
1150 av_dlog(NULL, " Floor0 decoded\n");
1155 static int vorbis_floor1_decode(vorbis_context *vc,
1156 vorbis_floor_data *vfu, float *vec)
1158 vorbis_floor1 *vf = &vfu->t1;
1159 GetBitContext *gb = &vc->gb;
1160 uint16_t range_v[4] = { 256, 128, 86, 64 };
1161 unsigned range = range_v[vf->multiplier - 1];
1162 uint16_t floor1_Y[258];
1163 uint16_t floor1_Y_final[258];
1164 int floor1_flag[258];
1165 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1166 int book, adx, ady, dy, off, predicted, err;
1169 if (!get_bits1(gb)) // silence
1172 // Read values (or differences) for the floor's points
1174 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1175 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1177 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1180 for (i = 0; i < vf->partitions; ++i) {
1181 partition_class = vf->partition_class[i];
1182 cdim = vf->class_dimensions[partition_class];
1183 cbits = vf->class_subclasses[partition_class];
1184 csub = (1 << cbits) - 1;
1187 av_dlog(NULL, "Cbits %u\n", cbits);
1189 if (cbits) // this reads all subclasses for this partition's class
1190 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1191 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1193 for (j = 0; j < cdim; ++j) {
1194 book = vf->subclass_books[partition_class][cval & csub];
1196 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1197 book, cbits, cval, get_bits_count(gb));
1199 cval = cval >> cbits;
1201 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1202 vc->codebooks[book].nb_bits, 3);
1204 floor1_Y[offset+j] = 0;
1207 av_dlog(NULL, " floor(%d) = %d \n",
1208 vf->list[offset+j].x, floor1_Y[offset+j]);
1213 // Amplitude calculation from the differences
1217 floor1_Y_final[0] = floor1_Y[0];
1218 floor1_Y_final[1] = floor1_Y[1];
1220 for (i = 2; i < vf->x_list_dim; ++i) {
1221 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1223 low_neigh_offs = vf->list[i].low;
1224 high_neigh_offs = vf->list[i].high;
1225 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1226 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1228 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1231 predicted = floor1_Y_final[low_neigh_offs] - off;
1233 predicted = floor1_Y_final[low_neigh_offs] + off;
1234 } // render_point end
1237 highroom = range-predicted;
1238 lowroom = predicted;
1239 if (highroom < lowroom) {
1240 room = highroom * 2;
1242 room = lowroom * 2; // SPEC misspelling
1245 floor1_flag[low_neigh_offs] = 1;
1246 floor1_flag[high_neigh_offs] = 1;
1249 if (highroom > lowroom) {
1250 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1252 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1256 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1258 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1263 floor1_Y_final[i] = av_clip_uint16(predicted);
1266 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1267 vf->list[i].x, floor1_Y_final[i], val);
1270 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1272 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1274 av_dlog(NULL, " Floor decoded\n");
1279 // Read and decode residue
1281 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1284 uint8_t *do_not_decode,
1290 GetBitContext *gb = &vc->gb;
1291 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1292 unsigned ptns_to_read = vr->ptns_to_read;
1293 uint8_t *classifs = vr->classifs;
1294 unsigned pass, ch_used, i, j, k, l;
1295 unsigned max_output = (ch - 1) * vlen;
1298 for (j = 1; j < ch; ++j)
1299 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1300 if (do_not_decode[0])
1303 max_output += vr->end / ch;
1306 max_output += vr->end;
1309 if (max_output > ch_left * vlen) {
1310 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1314 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1316 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1317 uint16_t voffset, partition_count, j_times_ptns_to_read;
1319 voffset = vr->begin;
1320 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1322 unsigned inverse_class = ff_inverse[vr->classifications];
1323 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1324 if (!do_not_decode[j]) {
1325 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1326 vc->codebooks[vr->classbook].nb_bits, 3);
1328 av_dlog(NULL, "Classword: %u\n", temp);
1330 av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1331 for (i = 0; i < c_p_c; ++i) {
1334 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1335 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1336 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1340 j_times_ptns_to_read += ptns_to_read;
1343 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1344 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1347 if (!do_not_decode[j]) {
1348 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1349 int vqbook = vr->books[vqclass][pass];
1351 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1353 unsigned dim = vc->codebooks[vqbook].dimensions;
1354 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1355 vorbis_codebook codebook = vc->codebooks[vqbook];
1359 voffs = voffset+j*vlen;
1360 for (k = 0; k < step; ++k) {
1361 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1362 for (l = 0; l < dim; ++l)
1363 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1365 } else if (vr_type == 1) {
1366 voffs = voffset + j * vlen;
1367 for (k = 0; k < step; ++k) {
1368 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1369 for (l = 0; l < dim; ++l, ++voffs) {
1370 vec[voffs]+=codebook.codevectors[coffs+l];
1372 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1373 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1376 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1377 voffs = voffset >> 1;
1380 for (k = 0; k < step; ++k) {
1381 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1382 vec[voffs + k ] += codebook.codevectors[coffs ];
1383 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1385 } else if (dim == 4) {
1386 for (k = 0; k < step; ++k, voffs += 2) {
1387 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1388 vec[voffs ] += codebook.codevectors[coffs ];
1389 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1390 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1391 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1394 for (k = 0; k < step; ++k) {
1395 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1396 for (l = 0; l < dim; l += 2, voffs++) {
1397 vec[voffs ] += codebook.codevectors[coffs + l ];
1398 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1400 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1401 pass, voffset / ch + (voffs % ch) * vlen,
1402 vec[voffset / ch + (voffs % ch) * vlen],
1403 codebook.codevectors[coffs + l], coffs, l);
1407 } else if (vr_type == 2) {
1408 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1409 unsigned voffs_mod = voffset - voffs_div * ch;
1411 for (k = 0; k < step; ++k) {
1412 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1413 for (l = 0; l < dim; ++l) {
1414 vec[voffs_div + voffs_mod * vlen] +=
1415 codebook.codevectors[coffs + l];
1417 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1418 pass, voffs_div + voffs_mod * vlen,
1419 vec[voffs_div + voffs_mod * vlen],
1420 codebook.codevectors[coffs + l], coffs, l);
1422 if (++voffs_mod == ch) {
1431 j_times_ptns_to_read += ptns_to_read;
1434 voffset += vr->partition_size;
1441 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1443 uint8_t *do_not_decode,
1444 float *vec, unsigned vlen,
1448 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1449 else if (vr->type == 1)
1450 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1451 else if (vr->type == 0)
1452 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1454 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1455 return AVERROR_INVALIDDATA;
1459 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1462 for (i = 0; i < blocksize; i++) {
1465 ang[i] = mag[i] - ang[i];
1467 float temp = ang[i];
1475 float temp = ang[i];
1483 // Decode the audio packet using the functions above
1485 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1487 GetBitContext *gb = &vc->gb;
1489 unsigned previous_window = vc->previous_window;
1490 unsigned mode_number, blockflag, blocksize;
1492 uint8_t no_residue[255];
1493 uint8_t do_not_decode[255];
1494 vorbis_mapping *mapping;
1495 float *ch_res_ptr = vc->channel_residues;
1496 uint8_t res_chan[255];
1497 unsigned res_num = 0;
1499 unsigned ch_left = vc->audio_channels;
1502 if (get_bits1(gb)) {
1503 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1504 return AVERROR_INVALIDDATA; // packet type not audio
1507 if (vc->mode_count == 1) {
1510 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1512 vc->mode_number = mode_number;
1513 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1515 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1516 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1518 blockflag = vc->modes[mode_number].blockflag;
1519 blocksize = vc->blocksize[blockflag];
1520 vlen = blocksize / 2;
1522 previous_window = get_bits(gb, 1);
1523 skip_bits1(gb); // next_window
1526 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1527 for (i = 0; i < vc->audio_channels; ++i)
1528 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1532 for (i = 0; i < vc->audio_channels; ++i) {
1533 vorbis_floor *floor;
1535 if (mapping->submaps > 1) {
1536 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1538 floor = &vc->floors[mapping->submap_floor[0]];
1541 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1544 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1545 return AVERROR_INVALIDDATA;
1547 no_residue[i] = ret;
1550 // Nonzero vector propagate
1552 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1553 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1554 no_residue[mapping->magnitude[i]] = 0;
1555 no_residue[mapping->angle[i]] = 0;
1561 for (i = 0; i < mapping->submaps; ++i) {
1562 vorbis_residue *residue;
1566 for (j = 0; j < vc->audio_channels; ++j) {
1567 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1568 res_chan[j] = res_num;
1569 if (no_residue[j]) {
1570 do_not_decode[ch] = 1;
1572 do_not_decode[ch] = 0;
1578 residue = &vc->residues[mapping->submap_residue[i]];
1580 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1584 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1589 ch_res_ptr += ch * vlen;
1594 return AVERROR_INVALIDDATA;
1598 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1601 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1602 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1603 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1608 mdct = &vc->mdct[blockflag];
1610 for (j = vc->audio_channels-1;j >= 0; j--) {
1611 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1612 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1613 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1616 // Overlap/add, save data for next overlapping
1618 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1619 for (j = 0; j < vc->audio_channels; j++) {
1620 unsigned bs0 = vc->blocksize[0];
1621 unsigned bs1 = vc->blocksize[1];
1622 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1623 float *saved = vc->saved + j * bs1 / 4;
1624 float *ret = floor_ptr[j];
1625 float *buf = residue;
1626 const float *win = vc->win[blockflag & previous_window];
1628 if (blockflag == previous_window) {
1629 vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1630 } else if (blockflag > previous_window) {
1631 vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1632 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1634 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1635 vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1637 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1640 vc->previous_window = blockflag;
1644 // Return the decoded audio packet through the standard api
1646 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1647 int *got_frame_ptr, AVPacket *avpkt)
1649 const uint8_t *buf = avpkt->data;
1650 int buf_size = avpkt->size;
1651 vorbis_context *vc = avccontext->priv_data;
1652 AVFrame *frame = data;
1653 GetBitContext *gb = &vc->gb;
1654 float *channel_ptrs[255];
1657 av_dlog(NULL, "packet length %d \n", buf_size);
1659 if (*buf == 1 && buf_size > 7) {
1660 init_get_bits(gb, buf+1, buf_size*8 - 8);
1662 if ((ret = vorbis_parse_id_hdr(vc))) {
1663 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1668 if (vc->audio_channels > 8)
1669 avccontext->channel_layout = 0;
1671 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1673 avccontext->channels = vc->audio_channels;
1674 avccontext->sample_rate = vc->audio_samplerate;
1678 if (*buf == 3 && buf_size > 7) {
1679 av_log(avccontext, AV_LOG_DEBUG, "Ignoring comment header\n");
1683 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1684 init_get_bits(gb, buf+1, buf_size*8 - 8);
1685 if ((ret = vorbis_parse_setup_hdr(vc))) {
1686 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1693 if (!vc->channel_residues || !vc->modes) {
1694 av_log(avccontext, AV_LOG_ERROR, "Data packet before valid headers\n");
1695 return AVERROR_INVALIDDATA;
1698 /* get output buffer */
1699 frame->nb_samples = vc->blocksize[1] / 2;
1700 if ((ret = ff_get_buffer(avccontext, frame)) < 0) {
1701 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1705 if (vc->audio_channels > 8) {
1706 for (i = 0; i < vc->audio_channels; i++)
1707 channel_ptrs[i] = (float *)frame->extended_data[i];
1709 for (i = 0; i < vc->audio_channels; i++) {
1710 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1711 channel_ptrs[ch] = (float *)frame->extended_data[i];
1715 init_get_bits(gb, buf, buf_size*8);
1717 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1720 if (!vc->first_frame) {
1721 vc->first_frame = 1;
1726 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1727 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1729 frame->nb_samples = len;
1737 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1739 vorbis_context *vc = avccontext->priv_data;
1746 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1748 vorbis_context *vc = avccontext->priv_data;
1751 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1752 sizeof(*vc->saved));
1754 vc->previous_window = 0;
1757 AVCodec ff_vorbis_decoder = {
1759 .type = AVMEDIA_TYPE_AUDIO,
1760 .id = AV_CODEC_ID_VORBIS,
1761 .priv_data_size = sizeof(vorbis_context),
1762 .init = vorbis_decode_init,
1763 .close = vorbis_decode_close,
1764 .decode = vorbis_decode_frame,
1765 .flush = vorbis_decode_flush,
1766 .capabilities = CODEC_CAP_DR1,
1767 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1768 .channel_layouts = ff_vorbis_channel_layouts,
1769 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1770 AV_SAMPLE_FMT_NONE },