4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
39 #include "fmtconvert.h"
46 #define V_MAX_VLCS (1 << 16)
47 #define V_MAX_PARTITIONS (1 << 20)
58 typedef union vorbis_floor_u vorbis_floor_data;
59 typedef struct vorbis_floor0_s vorbis_floor0;
60 typedef struct vorbis_floor1_s vorbis_floor1;
61 struct vorbis_context_s;
63 int (* vorbis_floor_decode_func)
64 (struct vorbis_context_s *, vorbis_floor_data *, float *);
67 vorbis_floor_decode_func decode;
68 union vorbis_floor_u {
69 struct vorbis_floor0_s {
72 uint16_t bark_map_size;
75 uint8_t amplitude_bits;
76 uint8_t amplitude_offset;
81 struct vorbis_floor1_s {
83 uint8_t partition_class[32];
84 uint8_t class_dimensions[16];
85 uint8_t class_subclasses[16];
86 uint8_t class_masterbook[16];
87 int16_t subclass_books[16][8];
90 vorbis_floor1_entry *list;
99 unsigned partition_size;
100 uint8_t classifications;
102 int16_t books[64][8];
104 uint16_t ptns_to_read;
110 uint16_t coupling_steps;
114 uint8_t submap_floor[16];
115 uint8_t submap_residue[16];
121 uint16_t transformtype;
125 typedef struct vorbis_context_s {
126 AVCodecContext *avccontext;
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);
197 for (i = 0; i < vc->residue_count; i++)
198 av_free(vc->residues[i].classifs);
199 av_freep(&vc->residues);
200 av_freep(&vc->modes);
202 ff_mdct_end(&vc->mdct[0]);
203 ff_mdct_end(&vc->mdct[1]);
205 for (i = 0; i < vc->codebook_count; ++i) {
206 av_free(vc->codebooks[i].codevectors);
207 ff_free_vlc(&vc->codebooks[i].vlc);
209 av_freep(&vc->codebooks);
211 for (i = 0; i < vc->floor_count; ++i) {
212 if (vc->floors[i].floor_type == 0) {
213 av_free(vc->floors[i].data.t0.map[0]);
214 av_free(vc->floors[i].data.t0.map[1]);
215 av_free(vc->floors[i].data.t0.book_list);
216 av_free(vc->floors[i].data.t0.lsp);
218 av_free(vc->floors[i].data.t1.list);
221 av_freep(&vc->floors);
223 for (i = 0; i < vc->mapping_count; ++i) {
224 av_free(vc->mappings[i].magnitude);
225 av_free(vc->mappings[i].angle);
226 av_free(vc->mappings[i].mux);
228 av_freep(&vc->mappings);
231 // Parse setup header -------------------------------------------------
233 // Process codebooks part
235 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
238 uint8_t *tmp_vlc_bits;
239 uint32_t *tmp_vlc_codes;
240 GetBitContext *gb = &vc->gb;
241 uint16_t *codebook_multiplicands;
244 vc->codebook_count = get_bits(gb, 8) + 1;
246 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
248 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
249 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
250 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
251 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
253 for (cb = 0; cb < vc->codebook_count; ++cb) {
254 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
255 unsigned ordered, t, entries, used_entries = 0;
257 av_dlog(NULL, " %u. Codebook\n", cb);
259 if (get_bits(gb, 24) != 0x564342) {
260 av_log(vc->avccontext, AV_LOG_ERROR,
261 " %u. Codebook setup data corrupt.\n", cb);
262 ret = AVERROR_INVALIDDATA;
266 codebook_setup->dimensions=get_bits(gb, 16);
267 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
268 av_log(vc->avccontext, AV_LOG_ERROR,
269 " %u. Codebook's dimension is invalid (%d).\n",
270 cb, codebook_setup->dimensions);
271 ret = AVERROR_INVALIDDATA;
274 entries = get_bits(gb, 24);
275 if (entries > V_MAX_VLCS) {
276 av_log(vc->avccontext, AV_LOG_ERROR,
277 " %u. Codebook has too many entries (%u).\n",
279 ret = AVERROR_INVALIDDATA;
283 ordered = get_bits1(gb);
285 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
286 codebook_setup->dimensions, entries);
290 unsigned sparse = get_bits1(gb);
292 av_dlog(NULL, " not ordered \n");
295 av_dlog(NULL, " sparse \n");
298 for (ce = 0; ce < entries; ++ce) {
299 flag = get_bits1(gb);
301 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
304 tmp_vlc_bits[ce] = 0;
307 av_dlog(NULL, " not sparse \n");
309 used_entries = entries;
310 for (ce = 0; ce < entries; ++ce)
311 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
314 unsigned current_entry = 0;
315 unsigned current_length = get_bits(gb, 5) + 1;
317 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
319 used_entries = entries;
320 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
323 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
325 number = get_bits(gb, ilog(entries - current_entry));
327 av_dlog(NULL, " number: %u\n", number);
329 for (i = current_entry; i < number+current_entry; ++i)
330 if (i < used_entries)
331 tmp_vlc_bits[i] = current_length;
333 current_entry+=number;
335 if (current_entry>used_entries) {
336 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
337 ret = AVERROR_INVALIDDATA;
342 codebook_setup->lookup_type = get_bits(gb, 4);
344 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
345 codebook_setup->lookup_type ? "vq" : "no lookup");
347 // If the codebook is used for (inverse) VQ, calculate codevectors.
349 if (codebook_setup->lookup_type == 1) {
351 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
353 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
354 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
355 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
356 unsigned codebook_sequence_p = get_bits1(gb);
358 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
359 codebook_lookup_values);
360 av_dlog(NULL, " delta %f minmum %f \n",
361 codebook_delta_value, codebook_minimum_value);
363 for (i = 0; i < codebook_lookup_values; ++i) {
364 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
366 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
367 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
368 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
371 // Weed out unused vlcs and build codevector vector
372 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
373 codebook_setup->dimensions *
374 sizeof(*codebook_setup->codevectors))
376 for (j = 0, i = 0; i < entries; ++i) {
377 unsigned dim = codebook_setup->dimensions;
379 if (tmp_vlc_bits[i]) {
381 unsigned lookup_offset = i;
383 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
385 for (k = 0; k < dim; ++k) {
386 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
387 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
388 if (codebook_sequence_p)
389 last = codebook_setup->codevectors[j * dim + k];
390 lookup_offset/=codebook_lookup_values;
392 tmp_vlc_bits[j] = tmp_vlc_bits[i];
394 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
395 for (k = 0; k < dim; ++k)
396 av_dlog(vc->avccontext, " %f ",
397 codebook_setup->codevectors[j * dim + k]);
398 av_dlog(vc->avccontext, "\n");
403 if (j != used_entries) {
404 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
405 ret = AVERROR_INVALIDDATA;
408 entries = used_entries;
409 } else if (codebook_setup->lookup_type >= 2) {
410 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
411 ret = AVERROR_INVALIDDATA;
415 // Initialize VLC table
416 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
417 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
418 ret = AVERROR_INVALIDDATA;
421 codebook_setup->maxdepth = 0;
422 for (t = 0; t < entries; ++t)
423 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
424 codebook_setup->maxdepth = tmp_vlc_bits[t];
426 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
427 codebook_setup->nb_bits = V_NB_BITS2;
429 codebook_setup->nb_bits = V_NB_BITS;
431 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
433 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
434 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
435 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
436 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
438 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
443 av_free(tmp_vlc_bits);
444 av_free(tmp_vlc_codes);
445 av_free(codebook_multiplicands);
450 av_free(tmp_vlc_bits);
451 av_free(tmp_vlc_codes);
452 av_free(codebook_multiplicands);
456 // Process time domain transforms part (unused in Vorbis I)
458 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
460 GetBitContext *gb = &vc->gb;
461 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
463 for (i = 0; i < vorbis_time_count; ++i) {
464 unsigned vorbis_tdtransform = get_bits(gb, 16);
466 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
467 vorbis_time_count, vorbis_tdtransform);
469 if (vorbis_tdtransform) {
470 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
471 return AVERROR_INVALIDDATA;
477 // Process floors part
479 static int vorbis_floor0_decode(vorbis_context *vc,
480 vorbis_floor_data *vfu, float *vec);
481 static void create_map(vorbis_context *vc, unsigned floor_number);
482 static int vorbis_floor1_decode(vorbis_context *vc,
483 vorbis_floor_data *vfu, float *vec);
484 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
486 GetBitContext *gb = &vc->gb;
489 vc->floor_count = get_bits(gb, 6) + 1;
491 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
493 for (i = 0; i < vc->floor_count; ++i) {
494 vorbis_floor *floor_setup = &vc->floors[i];
496 floor_setup->floor_type = get_bits(gb, 16);
498 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
500 if (floor_setup->floor_type == 1) {
501 int maximum_class = -1;
502 unsigned rangebits, rangemax, floor1_values = 2;
504 floor_setup->decode = vorbis_floor1_decode;
506 floor_setup->data.t1.partitions = get_bits(gb, 5);
508 av_dlog(NULL, " %d.floor: %d partitions \n",
509 i, floor_setup->data.t1.partitions);
511 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
512 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
513 if (floor_setup->data.t1.partition_class[j] > maximum_class)
514 maximum_class = floor_setup->data.t1.partition_class[j];
516 av_dlog(NULL, " %d. floor %d partition class %d \n",
517 i, j, floor_setup->data.t1.partition_class[j]);
521 av_dlog(NULL, " maximum class %d \n", maximum_class);
523 for (j = 0; j <= maximum_class; ++j) {
524 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
525 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
527 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
528 floor_setup->data.t1.class_dimensions[j],
529 floor_setup->data.t1.class_subclasses[j]);
531 if (floor_setup->data.t1.class_subclasses[j]) {
532 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
534 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
537 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
538 int16_t bits = get_bits(gb, 8) - 1;
540 VALIDATE_INDEX(bits, vc->codebook_count)
541 floor_setup->data.t1.subclass_books[j][k] = bits;
543 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
547 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
548 floor_setup->data.t1.x_list_dim = 2;
550 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
551 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
553 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
554 sizeof(*floor_setup->data.t1.list));
557 rangebits = get_bits(gb, 4);
558 rangemax = (1 << rangebits);
559 if (rangemax > vc->blocksize[1] / 2) {
560 av_log(vc->avccontext, AV_LOG_ERROR,
561 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
562 rangemax, vc->blocksize[1] / 2);
563 return AVERROR_INVALIDDATA;
565 floor_setup->data.t1.list[0].x = 0;
566 floor_setup->data.t1.list[1].x = rangemax;
568 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
569 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
570 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
572 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
573 floor_setup->data.t1.list[floor1_values].x);
577 // Precalculate order of x coordinates - needed for decode
578 if (ff_vorbis_ready_floor1_list(vc->avccontext,
579 floor_setup->data.t1.list,
580 floor_setup->data.t1.x_list_dim)) {
581 return AVERROR_INVALIDDATA;
583 } else if (floor_setup->floor_type == 0) {
584 unsigned max_codebook_dim = 0;
586 floor_setup->decode = vorbis_floor0_decode;
588 floor_setup->data.t0.order = get_bits(gb, 8);
589 floor_setup->data.t0.rate = get_bits(gb, 16);
590 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
591 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
592 /* zero would result in a div by zero later *
594 if (floor_setup->data.t0.amplitude_bits == 0) {
595 av_log(vc->avccontext, AV_LOG_ERROR,
596 "Floor 0 amplitude bits is 0.\n");
597 return AVERROR_INVALIDDATA;
599 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
600 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
602 /* allocate mem for booklist */
603 floor_setup->data.t0.book_list =
604 av_malloc(floor_setup->data.t0.num_books);
605 if (!floor_setup->data.t0.book_list)
606 return AVERROR(ENOMEM);
607 /* read book indexes */
611 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
612 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
613 floor_setup->data.t0.book_list[idx] = book_idx;
614 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
615 max_codebook_dim = vc->codebooks[book_idx].dimensions;
621 /* codebook dim is for padding if codebook dim doesn't *
622 * divide order+1 then we need to read more data */
623 floor_setup->data.t0.lsp =
624 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
625 * sizeof(*floor_setup->data.t0.lsp));
626 if (!floor_setup->data.t0.lsp)
627 return AVERROR(ENOMEM);
629 /* debug output parsed headers */
630 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
631 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
632 av_dlog(NULL, "floor0 bark map size: %u\n",
633 floor_setup->data.t0.bark_map_size);
634 av_dlog(NULL, "floor0 amplitude bits: %u\n",
635 floor_setup->data.t0.amplitude_bits);
636 av_dlog(NULL, "floor0 amplitude offset: %u\n",
637 floor_setup->data.t0.amplitude_offset);
638 av_dlog(NULL, "floor0 number of books: %u\n",
639 floor_setup->data.t0.num_books);
640 av_dlog(NULL, "floor0 book list pointer: %p\n",
641 floor_setup->data.t0.book_list);
644 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
645 av_dlog(NULL, " Book %d: %u\n", idx + 1,
646 floor_setup->data.t0.book_list[idx]);
650 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
651 return AVERROR_INVALIDDATA;
657 // Process residues part
659 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
661 GetBitContext *gb = &vc->gb;
664 vc->residue_count = get_bits(gb, 6)+1;
665 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
667 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
669 for (i = 0; i < vc->residue_count; ++i) {
670 vorbis_residue *res_setup = &vc->residues[i];
672 unsigned high_bits, low_bits;
674 res_setup->type = get_bits(gb, 16);
676 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
678 res_setup->begin = get_bits(gb, 24);
679 res_setup->end = get_bits(gb, 24);
680 res_setup->partition_size = get_bits(gb, 24) + 1;
681 /* Validations to prevent a buffer overflow later. */
682 if (res_setup->begin>res_setup->end ||
683 res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
684 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
685 av_log(vc->avccontext, AV_LOG_ERROR,
686 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
687 res_setup->type, res_setup->begin, res_setup->end,
688 res_setup->partition_size, vc->blocksize[1] / 2);
689 return AVERROR_INVALIDDATA;
692 res_setup->classifications = get_bits(gb, 6) + 1;
693 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
695 res_setup->ptns_to_read =
696 (res_setup->end - res_setup->begin) / res_setup->partition_size;
697 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
699 sizeof(*res_setup->classifs));
700 if (!res_setup->classifs)
701 return AVERROR(ENOMEM);
703 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
704 res_setup->begin, res_setup->end, res_setup->partition_size,
705 res_setup->classifications, res_setup->classbook);
707 for (j = 0; j < res_setup->classifications; ++j) {
709 low_bits = get_bits(gb, 3);
711 high_bits = get_bits(gb, 5);
712 cascade[j] = (high_bits << 3) + low_bits;
714 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
717 res_setup->maxpass = 0;
718 for (j = 0; j < res_setup->classifications; ++j) {
719 for (k = 0; k < 8; ++k) {
720 if (cascade[j]&(1 << k)) {
721 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
723 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
724 j, k, res_setup->books[j][k]);
726 if (k>res_setup->maxpass)
727 res_setup->maxpass = k;
729 res_setup->books[j][k] = -1;
737 // Process mappings part
739 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
741 GetBitContext *gb = &vc->gb;
744 vc->mapping_count = get_bits(gb, 6)+1;
745 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
747 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
749 for (i = 0; i < vc->mapping_count; ++i) {
750 vorbis_mapping *mapping_setup = &vc->mappings[i];
752 if (get_bits(gb, 16)) {
753 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
754 return AVERROR_INVALIDDATA;
757 mapping_setup->submaps = get_bits(gb, 4) + 1;
759 mapping_setup->submaps = 1;
763 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
764 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
765 sizeof(*mapping_setup->magnitude));
766 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
767 sizeof(*mapping_setup->angle));
768 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
769 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
770 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
773 mapping_setup->coupling_steps = 0;
776 av_dlog(NULL, " %u mapping coupling steps: %d\n",
777 i, mapping_setup->coupling_steps);
779 if (get_bits(gb, 2)) {
780 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
781 return AVERROR_INVALIDDATA; // following spec.
784 if (mapping_setup->submaps>1) {
785 mapping_setup->mux = av_mallocz(vc->audio_channels *
786 sizeof(*mapping_setup->mux));
787 for (j = 0; j < vc->audio_channels; ++j)
788 mapping_setup->mux[j] = get_bits(gb, 4);
791 for (j = 0; j < mapping_setup->submaps; ++j) {
792 skip_bits(gb, 8); // FIXME check?
793 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
794 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
796 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
797 mapping_setup->submap_floor[j],
798 mapping_setup->submap_residue[j]);
804 // Process modes part
806 static void create_map(vorbis_context *vc, unsigned floor_number)
808 vorbis_floor *floors = vc->floors;
814 for (blockflag = 0; blockflag < 2; ++blockflag) {
815 n = vc->blocksize[blockflag] / 2;
816 floors[floor_number].data.t0.map[blockflag] =
817 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
819 map = floors[floor_number].data.t0.map[blockflag];
820 vf = &floors[floor_number].data.t0;
822 for (idx = 0; idx < n; ++idx) {
823 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
824 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
825 if (vf->bark_map_size-1 < map[idx])
826 map[idx] = vf->bark_map_size - 1;
829 vf->map_size[blockflag] = n;
832 for (idx = 0; idx <= n; ++idx) {
833 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
837 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
839 GetBitContext *gb = &vc->gb;
842 vc->mode_count = get_bits(gb, 6) + 1;
843 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
845 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
847 for (i = 0; i < vc->mode_count; ++i) {
848 vorbis_mode *mode_setup = &vc->modes[i];
850 mode_setup->blockflag = get_bits1(gb);
851 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
852 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
853 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
855 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
856 i, mode_setup->blockflag, mode_setup->windowtype,
857 mode_setup->transformtype, mode_setup->mapping);
862 // Process the whole setup header using the functions above
864 static int vorbis_parse_setup_hdr(vorbis_context *vc)
866 GetBitContext *gb = &vc->gb;
869 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
870 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
871 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
873 return AVERROR_INVALIDDATA;
876 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
877 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
880 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
881 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
884 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
885 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
888 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
889 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
892 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
893 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
896 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
897 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
900 if (!get_bits1(gb)) {
901 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
902 return AVERROR_INVALIDDATA; // framing flag bit unset error
908 // Process the identification header
910 static int vorbis_parse_id_hdr(vorbis_context *vc)
912 GetBitContext *gb = &vc->gb;
915 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
916 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
917 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
918 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
919 return AVERROR_INVALIDDATA;
922 vc->version = get_bits_long(gb, 32); //FIXME check 0
923 vc->audio_channels = get_bits(gb, 8);
924 if (vc->audio_channels <= 0) {
925 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
926 return AVERROR_INVALIDDATA;
928 vc->audio_samplerate = get_bits_long(gb, 32);
929 if (vc->audio_samplerate <= 0) {
930 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
931 return AVERROR_INVALIDDATA;
933 vc->bitrate_maximum = get_bits_long(gb, 32);
934 vc->bitrate_nominal = get_bits_long(gb, 32);
935 vc->bitrate_minimum = get_bits_long(gb, 32);
936 bl0 = get_bits(gb, 4);
937 bl1 = get_bits(gb, 4);
938 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
939 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
940 return AVERROR_INVALIDDATA;
942 vc->blocksize[0] = (1 << bl0);
943 vc->blocksize[1] = (1 << bl1);
944 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
945 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
947 if ((get_bits1(gb)) == 0) {
948 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
949 return AVERROR_INVALIDDATA;
952 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
953 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
954 vc->previous_window = 0;
956 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
957 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
959 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 ",
960 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
963 BLK = vc->blocksize[0];
964 for (i = 0; i < BLK / 2; ++i) {
965 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)));
972 // Process the extradata using the functions above (identification header, setup header)
974 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
976 vorbis_context *vc = avccontext->priv_data;
977 uint8_t *headers = avccontext->extradata;
978 int headers_len = avccontext->extradata_size;
979 uint8_t *header_start[3];
981 GetBitContext *gb = &vc->gb;
984 vc->avccontext = avccontext;
985 ff_dsputil_init(&vc->dsp, avccontext);
986 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
987 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
989 avccontext->sample_fmt = AV_SAMPLE_FMT_FLTP;
992 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
993 return AVERROR_INVALIDDATA;
996 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
997 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1001 init_get_bits(gb, header_start[0], header_len[0]*8);
1002 hdr_type = get_bits(gb, 8);
1003 if (hdr_type != 1) {
1004 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1005 return AVERROR_INVALIDDATA;
1007 if ((ret = vorbis_parse_id_hdr(vc))) {
1008 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1013 init_get_bits(gb, header_start[2], header_len[2]*8);
1014 hdr_type = get_bits(gb, 8);
1015 if (hdr_type != 5) {
1016 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1018 return AVERROR_INVALIDDATA;
1020 if ((ret = vorbis_parse_setup_hdr(vc))) {
1021 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1026 if (vc->audio_channels > 8)
1027 avccontext->channel_layout = 0;
1029 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1031 avccontext->channels = vc->audio_channels;
1032 avccontext->sample_rate = vc->audio_samplerate;
1034 avcodec_get_frame_defaults(&vc->frame);
1035 avccontext->coded_frame = &vc->frame;
1040 // Decode audiopackets -------------------------------------------------
1042 // Read and decode floor
1044 static int vorbis_floor0_decode(vorbis_context *vc,
1045 vorbis_floor_data *vfu, float *vec)
1047 vorbis_floor0 *vf = &vfu->t0;
1048 float *lsp = vf->lsp;
1049 unsigned amplitude, book_idx;
1050 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1052 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1053 if (amplitude > 0) {
1055 unsigned idx, lsp_len = 0;
1056 vorbis_codebook codebook;
1058 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1059 if (book_idx >= vf->num_books) {
1060 av_log(vc->avccontext, AV_LOG_ERROR,
1061 "floor0 dec: booknumber too high!\n");
1064 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1065 codebook = vc->codebooks[vf->book_list[book_idx]];
1066 /* Invalid codebook! */
1067 if (!codebook.codevectors)
1068 return AVERROR_INVALIDDATA;
1070 while (lsp_len<vf->order) {
1073 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1074 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1075 /* read temp vector */
1076 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1077 codebook.nb_bits, codebook.maxdepth)
1078 * codebook.dimensions;
1079 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1080 /* copy each vector component and add last to it */
1081 for (idx = 0; idx < codebook.dimensions; ++idx)
1082 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1083 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1085 lsp_len += codebook.dimensions;
1087 /* DEBUG: output lsp coeffs */
1090 for (idx = 0; idx < lsp_len; ++idx)
1091 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1094 /* synthesize floor output vector */
1097 int order = vf->order;
1098 float wstep = M_PI / vf->bark_map_size;
1100 for (i = 0; i < order; i++)
1101 lsp[i] = 2.0f * cos(lsp[i]);
1103 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1104 vf->map_size[blockflag], order, wstep);
1107 while (i < vf->map_size[blockflag]) {
1108 int j, iter_cond = vf->map[blockflag][i];
1111 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1113 /* similar part for the q and p products */
1114 for (j = 0; j + 1 < order; j += 2) {
1115 q *= lsp[j] - two_cos_w;
1116 p *= lsp[j + 1] - two_cos_w;
1118 if (j == order) { // even order
1119 p *= p * (2.0f - two_cos_w);
1120 q *= q * (2.0f + two_cos_w);
1121 } else { // odd order
1122 q *= two_cos_w-lsp[j]; // one more time for q
1124 /* final step and square */
1125 p *= p * (4.f - two_cos_w * two_cos_w);
1129 /* calculate linear floor value */
1130 q = exp((((amplitude*vf->amplitude_offset) /
1131 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1132 - vf->amplitude_offset) * .11512925f);
1137 } while (vf->map[blockflag][i] == iter_cond);
1141 /* this channel is unused */
1145 av_dlog(NULL, " Floor0 decoded\n");
1150 static int vorbis_floor1_decode(vorbis_context *vc,
1151 vorbis_floor_data *vfu, float *vec)
1153 vorbis_floor1 *vf = &vfu->t1;
1154 GetBitContext *gb = &vc->gb;
1155 uint16_t range_v[4] = { 256, 128, 86, 64 };
1156 unsigned range = range_v[vf->multiplier - 1];
1157 uint16_t floor1_Y[258];
1158 uint16_t floor1_Y_final[258];
1159 int floor1_flag[258];
1160 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1161 int book, adx, ady, dy, off, predicted, err;
1164 if (!get_bits1(gb)) // silence
1167 // Read values (or differences) for the floor's points
1169 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1170 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1172 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1175 for (i = 0; i < vf->partitions; ++i) {
1176 partition_class = vf->partition_class[i];
1177 cdim = vf->class_dimensions[partition_class];
1178 cbits = vf->class_subclasses[partition_class];
1179 csub = (1 << cbits) - 1;
1182 av_dlog(NULL, "Cbits %u\n", cbits);
1184 if (cbits) // this reads all subclasses for this partition's class
1185 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1186 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1188 for (j = 0; j < cdim; ++j) {
1189 book = vf->subclass_books[partition_class][cval & csub];
1191 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1192 book, cbits, cval, get_bits_count(gb));
1194 cval = cval >> cbits;
1196 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1197 vc->codebooks[book].nb_bits, 3);
1199 floor1_Y[offset+j] = 0;
1202 av_dlog(NULL, " floor(%d) = %d \n",
1203 vf->list[offset+j].x, floor1_Y[offset+j]);
1208 // Amplitude calculation from the differences
1212 floor1_Y_final[0] = floor1_Y[0];
1213 floor1_Y_final[1] = floor1_Y[1];
1215 for (i = 2; i < vf->x_list_dim; ++i) {
1216 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1218 low_neigh_offs = vf->list[i].low;
1219 high_neigh_offs = vf->list[i].high;
1220 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1221 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1223 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1226 predicted = floor1_Y_final[low_neigh_offs] - off;
1228 predicted = floor1_Y_final[low_neigh_offs] + off;
1229 } // render_point end
1232 highroom = range-predicted;
1233 lowroom = predicted;
1234 if (highroom < lowroom) {
1235 room = highroom * 2;
1237 room = lowroom * 2; // SPEC mispelling
1240 floor1_flag[low_neigh_offs] = 1;
1241 floor1_flag[high_neigh_offs] = 1;
1244 if (highroom > lowroom) {
1245 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1247 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1251 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1253 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1258 floor1_Y_final[i] = av_clip_uint16(predicted);
1261 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1262 vf->list[i].x, floor1_Y_final[i], val);
1265 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1267 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1269 av_dlog(NULL, " Floor decoded\n");
1274 // Read and decode residue
1276 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1279 uint8_t *do_not_decode,
1285 GetBitContext *gb = &vc->gb;
1286 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1287 unsigned ptns_to_read = vr->ptns_to_read;
1288 uint8_t *classifs = vr->classifs;
1289 unsigned pass, ch_used, i, j, k, l;
1290 unsigned max_output = (ch - 1) * vlen;
1293 for (j = 1; j < ch; ++j)
1294 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1295 if (do_not_decode[0])
1298 max_output += vr->end / ch;
1301 max_output += vr->end;
1304 if (max_output > ch_left * vlen) {
1305 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1309 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1311 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1312 uint16_t voffset, partition_count, j_times_ptns_to_read;
1314 voffset = vr->begin;
1315 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1317 unsigned inverse_class = ff_inverse[vr->classifications];
1318 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1319 if (!do_not_decode[j]) {
1320 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1321 vc->codebooks[vr->classbook].nb_bits, 3);
1323 av_dlog(NULL, "Classword: %u\n", temp);
1325 av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1326 for (i = 0; i < c_p_c; ++i) {
1329 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1330 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1331 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1335 j_times_ptns_to_read += ptns_to_read;
1338 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1339 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1342 if (!do_not_decode[j]) {
1343 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1344 int vqbook = vr->books[vqclass][pass];
1346 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1348 unsigned dim = vc->codebooks[vqbook].dimensions;
1349 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1350 vorbis_codebook codebook = vc->codebooks[vqbook];
1354 voffs = voffset+j*vlen;
1355 for (k = 0; k < step; ++k) {
1356 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1357 for (l = 0; l < dim; ++l)
1358 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1360 } else if (vr_type == 1) {
1361 voffs = voffset + j * vlen;
1362 for (k = 0; k < step; ++k) {
1363 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1364 for (l = 0; l < dim; ++l, ++voffs) {
1365 vec[voffs]+=codebook.codevectors[coffs+l];
1367 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1368 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1371 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1372 voffs = voffset >> 1;
1375 for (k = 0; k < step; ++k) {
1376 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1377 vec[voffs + k ] += codebook.codevectors[coffs ];
1378 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1380 } else if (dim == 4) {
1381 for (k = 0; k < step; ++k, voffs += 2) {
1382 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1383 vec[voffs ] += codebook.codevectors[coffs ];
1384 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1385 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1386 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1389 for (k = 0; k < step; ++k) {
1390 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1391 for (l = 0; l < dim; l += 2, voffs++) {
1392 vec[voffs ] += codebook.codevectors[coffs + l ];
1393 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1395 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1396 pass, voffset / ch + (voffs % ch) * vlen,
1397 vec[voffset / ch + (voffs % ch) * vlen],
1398 codebook.codevectors[coffs + l], coffs, l);
1402 } else if (vr_type == 2) {
1403 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1404 unsigned voffs_mod = voffset - voffs_div * ch;
1406 for (k = 0; k < step; ++k) {
1407 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1408 for (l = 0; l < dim; ++l) {
1409 vec[voffs_div + voffs_mod * vlen] +=
1410 codebook.codevectors[coffs + l];
1412 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1413 pass, voffs_div + voffs_mod * vlen,
1414 vec[voffs_div + voffs_mod * vlen],
1415 codebook.codevectors[coffs + l], coffs, l);
1417 if (++voffs_mod == ch) {
1426 j_times_ptns_to_read += ptns_to_read;
1429 voffset += vr->partition_size;
1436 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1438 uint8_t *do_not_decode,
1439 float *vec, unsigned vlen,
1443 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1444 else if (vr->type == 1)
1445 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1446 else if (vr->type == 0)
1447 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1449 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1450 return AVERROR_INVALIDDATA;
1454 void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1457 for (i = 0; i < blocksize; i++) {
1460 ang[i] = mag[i] - ang[i];
1462 float temp = ang[i];
1470 float temp = ang[i];
1478 // Decode the audio packet using the functions above
1480 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1482 GetBitContext *gb = &vc->gb;
1484 unsigned previous_window = vc->previous_window;
1485 unsigned mode_number, blockflag, blocksize;
1487 uint8_t no_residue[255];
1488 uint8_t do_not_decode[255];
1489 vorbis_mapping *mapping;
1490 float *ch_res_ptr = vc->channel_residues;
1491 uint8_t res_chan[255];
1492 unsigned res_num = 0;
1494 unsigned ch_left = vc->audio_channels;
1497 if (get_bits1(gb)) {
1498 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1499 return AVERROR_INVALIDDATA; // packet type not audio
1502 if (vc->mode_count == 1) {
1505 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1507 vc->mode_number = mode_number;
1508 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1510 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1511 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1513 blockflag = vc->modes[mode_number].blockflag;
1514 blocksize = vc->blocksize[blockflag];
1515 vlen = blocksize / 2;
1517 previous_window = get_bits(gb, 1);
1518 skip_bits1(gb); // next_window
1521 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1522 for (i = 0; i < vc->audio_channels; ++i)
1523 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1527 for (i = 0; i < vc->audio_channels; ++i) {
1528 vorbis_floor *floor;
1530 if (mapping->submaps > 1) {
1531 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1533 floor = &vc->floors[mapping->submap_floor[0]];
1536 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1539 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1540 return AVERROR_INVALIDDATA;
1542 no_residue[i] = ret;
1545 // Nonzero vector propagate
1547 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1548 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1549 no_residue[mapping->magnitude[i]] = 0;
1550 no_residue[mapping->angle[i]] = 0;
1556 for (i = 0; i < mapping->submaps; ++i) {
1557 vorbis_residue *residue;
1561 for (j = 0; j < vc->audio_channels; ++j) {
1562 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1563 res_chan[j] = res_num;
1564 if (no_residue[j]) {
1565 do_not_decode[ch] = 1;
1567 do_not_decode[ch] = 0;
1573 residue = &vc->residues[mapping->submap_residue[i]];
1575 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1579 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1584 ch_res_ptr += ch * vlen;
1589 return AVERROR_INVALIDDATA;
1593 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1596 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1597 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1598 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1603 mdct = &vc->mdct[blockflag];
1605 for (j = vc->audio_channels-1;j >= 0; j--) {
1606 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1607 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1608 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1611 // Overlap/add, save data for next overlapping
1613 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1614 for (j = 0; j < vc->audio_channels; j++) {
1615 unsigned bs0 = vc->blocksize[0];
1616 unsigned bs1 = vc->blocksize[1];
1617 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1618 float *saved = vc->saved + j * bs1 / 4;
1619 float *ret = floor_ptr[j];
1620 float *buf = residue;
1621 const float *win = vc->win[blockflag & previous_window];
1623 if (blockflag == previous_window) {
1624 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1625 } else if (blockflag > previous_window) {
1626 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1627 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1629 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1630 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1632 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1635 vc->previous_window = blockflag;
1639 // Return the decoded audio packet through the standard api
1641 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1642 int *got_frame_ptr, AVPacket *avpkt)
1644 const uint8_t *buf = avpkt->data;
1645 int buf_size = avpkt->size;
1646 vorbis_context *vc = avccontext->priv_data;
1647 GetBitContext *gb = &vc->gb;
1648 float *channel_ptrs[255];
1651 av_dlog(NULL, "packet length %d \n", buf_size);
1653 /* get output buffer */
1654 vc->frame.nb_samples = vc->blocksize[1] / 2;
1655 if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
1656 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1660 if (vc->audio_channels > 8) {
1661 for (i = 0; i < vc->audio_channels; i++)
1662 channel_ptrs[i] = (float *)vc->frame.extended_data[i];
1664 for (i = 0; i < vc->audio_channels; i++) {
1665 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1666 channel_ptrs[ch] = (float *)vc->frame.extended_data[i];
1670 init_get_bits(gb, buf, buf_size*8);
1672 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1675 if (!vc->first_frame) {
1676 vc->first_frame = 1;
1681 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1682 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1684 vc->frame.nb_samples = len;
1686 *(AVFrame *)data = vc->frame;
1693 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1695 vorbis_context *vc = avccontext->priv_data;
1702 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1704 vorbis_context *vc = avccontext->priv_data;
1707 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1708 sizeof(*vc->saved));
1710 vc->previous_window = 0;
1713 AVCodec ff_vorbis_decoder = {
1715 .type = AVMEDIA_TYPE_AUDIO,
1716 .id = AV_CODEC_ID_VORBIS,
1717 .priv_data_size = sizeof(vorbis_context),
1718 .init = vorbis_decode_init,
1719 .close = vorbis_decode_close,
1720 .decode = vorbis_decode_frame,
1721 .flush = vorbis_decode_flush,
1722 .capabilities = CODEC_CAP_DR1,
1723 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1724 .channel_layouts = ff_vorbis_channel_layouts,
1725 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1726 AV_SAMPLE_FMT_NONE },