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
25 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
29 #define ALT_BITSTREAM_READER_LE
40 #define V_MAX_VLCS (1 << 16)
41 #define V_MAX_PARTITIONS (1 << 20)
51 uint_fast8_t dimensions;
52 uint_fast8_t lookup_type;
53 uint_fast8_t maxdepth;
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 uint_fast8_t (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
67 uint_fast8_t floor_type;
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
73 uint_fast16_t bark_map_size;
75 uint_fast32_t map_size[2];
76 uint_fast8_t amplitude_bits;
77 uint_fast8_t amplitude_offset;
78 uint_fast8_t num_books;
79 uint_fast8_t *book_list;
82 struct vorbis_floor1_s {
83 uint_fast8_t partitions;
84 uint_fast8_t maximum_class;
85 uint_fast8_t partition_class[32];
86 uint_fast8_t class_dimensions[16];
87 uint_fast8_t class_subclasses[16];
88 uint_fast8_t class_masterbook[16];
89 int_fast16_t subclass_books[16][8];
90 uint_fast8_t multiplier;
91 uint_fast16_t x_list_dim;
92 vorbis_floor1_entry *list;
101 uint_fast32_t partition_size;
102 uint_fast8_t classifications;
103 uint_fast8_t classbook;
104 int_fast16_t books[64][8];
105 uint_fast8_t maxpass;
109 uint_fast8_t submaps;
110 uint_fast16_t coupling_steps;
111 uint_fast8_t *magnitude;
114 uint_fast8_t submap_floor[16];
115 uint_fast8_t submap_residue[16];
119 uint_fast8_t blockflag;
120 uint_fast16_t windowtype;
121 uint_fast16_t transformtype;
122 uint_fast8_t mapping;
125 typedef struct vorbis_context_s {
126 AVCodecContext *avccontext;
131 uint_fast8_t first_frame;
132 uint_fast32_t version;
133 uint_fast8_t audio_channels;
134 uint_fast32_t audio_samplerate;
135 uint_fast32_t bitrate_maximum;
136 uint_fast32_t bitrate_nominal;
137 uint_fast32_t bitrate_minimum;
138 uint_fast32_t blocksize[2];
140 uint_fast16_t codebook_count;
141 vorbis_codebook *codebooks;
142 uint_fast8_t floor_count;
143 vorbis_floor *floors;
144 uint_fast8_t residue_count;
145 vorbis_residue *residues;
146 uint_fast8_t mapping_count;
147 vorbis_mapping *mappings;
148 uint_fast8_t mode_count;
150 uint_fast8_t mode_number; // mode number for the current packet
151 uint_fast8_t previous_window;
152 float *channel_residues;
153 float *channel_floors;
155 uint_fast32_t add_bias; // for float->int conversion
156 uint_fast32_t exp_bias;
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__);\
172 #define GET_VALIDATED_INDEX(idx, bits, limit) \
174 idx = get_bits(gb, bits);\
175 VALIDATE_INDEX(idx, limit)\
178 static float vorbisfloat2float(uint_fast32_t 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->channel_floors);
196 av_freep(&vc->saved);
198 av_freep(&vc->residues);
199 av_freep(&vc->modes);
201 ff_mdct_end(&vc->mdct[0]);
202 ff_mdct_end(&vc->mdct[1]);
204 for (i = 0; i < vc->codebook_count; ++i) {
205 av_free(vc->codebooks[i].codevectors);
206 free_vlc(&vc->codebooks[i].vlc);
208 av_freep(&vc->codebooks);
210 for (i = 0; i < vc->floor_count; ++i) {
211 if (vc->floors[i].floor_type == 0) {
212 av_free(vc->floors[i].data.t0.map[0]);
213 av_free(vc->floors[i].data.t0.map[1]);
214 av_free(vc->floors[i].data.t0.book_list);
215 av_free(vc->floors[i].data.t0.lsp);
217 av_free(vc->floors[i].data.t1.list);
220 av_freep(&vc->floors);
222 for (i = 0; i < vc->mapping_count; ++i) {
223 av_free(vc->mappings[i].magnitude);
224 av_free(vc->mappings[i].angle);
225 av_free(vc->mappings[i].mux);
227 av_freep(&vc->mappings);
230 // Parse setup header -------------------------------------------------
232 // Process codebooks part
234 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
237 uint8_t *tmp_vlc_bits;
238 uint32_t *tmp_vlc_codes;
239 GetBitContext *gb = &vc->gb;
241 vc->codebook_count = get_bits(gb, 8) + 1;
243 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
245 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
246 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
247 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
249 for (cb = 0; cb < vc->codebook_count; ++cb) {
250 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
251 uint_fast8_t ordered;
252 uint_fast32_t t, used_entries = 0;
253 uint_fast32_t entries;
255 AV_DEBUG(" %d. Codebook \n", cb);
257 if (get_bits(gb, 24) != 0x564342) {
258 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
262 codebook_setup->dimensions=get_bits(gb, 16);
263 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
264 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions);
267 entries = get_bits(gb, 24);
268 if (entries > V_MAX_VLCS) {
269 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
273 ordered = get_bits1(gb);
275 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
280 uint_fast8_t sparse = get_bits1(gb);
282 AV_DEBUG(" not ordered \n");
285 AV_DEBUG(" sparse \n");
288 for (ce = 0; ce < entries; ++ce) {
289 flag = get_bits1(gb);
291 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
294 tmp_vlc_bits[ce] = 0;
297 AV_DEBUG(" not sparse \n");
299 used_entries = entries;
300 for (ce = 0; ce < entries; ++ce)
301 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
304 uint_fast16_t current_entry = 0;
305 uint_fast8_t current_length = get_bits(gb, 5)+1;
307 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
309 used_entries = entries;
310 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
311 uint_fast16_t i, number;
313 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
315 number = get_bits(gb, ilog(entries - current_entry));
317 AV_DEBUG(" number: %d \n", number);
319 for (i = current_entry; i < number+current_entry; ++i)
320 if (i < used_entries)
321 tmp_vlc_bits[i] = current_length;
323 current_entry+=number;
325 if (current_entry>used_entries) {
326 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
331 codebook_setup->lookup_type = get_bits(gb, 4);
333 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup");
335 // If the codebook is used for (inverse) VQ, calculate codevectors.
337 if (codebook_setup->lookup_type == 1) {
338 uint_fast16_t i, j, k;
339 uint_fast16_t codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
340 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
342 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
343 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
344 uint_fast8_t codebook_value_bits = get_bits(gb, 4)+1;
345 uint_fast8_t codebook_sequence_p = get_bits1(gb);
347 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
348 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
350 for (i = 0; i < codebook_lookup_values; ++i) {
351 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
353 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
354 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
357 // Weed out unused vlcs and build codevector vector
358 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
359 for (j = 0, i = 0; i < entries; ++i) {
360 uint_fast8_t dim = codebook_setup->dimensions;
362 if (tmp_vlc_bits[i]) {
364 uint_fast32_t lookup_offset = i;
367 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
370 for (k = 0; k < dim; ++k) {
371 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
372 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
373 if (codebook_sequence_p)
374 last = codebook_setup->codevectors[j * dim + k];
375 lookup_offset/=codebook_lookup_values;
377 tmp_vlc_bits[j] = tmp_vlc_bits[i];
380 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
381 for (k = 0; k < dim; ++k)
382 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j * dim + k]);
383 av_log(vc->avccontext, AV_LOG_INFO, "\n");
389 if (j != used_entries) {
390 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
393 entries = used_entries;
394 } else if (codebook_setup->lookup_type >= 2) {
395 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
399 // Initialize VLC table
400 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
401 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
404 codebook_setup->maxdepth = 0;
405 for (t = 0; t < entries; ++t)
406 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
407 codebook_setup->maxdepth = tmp_vlc_bits[t];
409 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
410 codebook_setup->nb_bits = V_NB_BITS2;
412 codebook_setup->nb_bits = V_NB_BITS;
414 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
416 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
417 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
422 av_free(tmp_vlc_bits);
423 av_free(tmp_vlc_codes);
428 av_free(tmp_vlc_bits);
429 av_free(tmp_vlc_codes);
433 // Process time domain transforms part (unused in Vorbis I)
435 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
437 GetBitContext *gb = &vc->gb;
439 uint_fast8_t vorbis_time_count = get_bits(gb, 6) + 1;
441 for (i = 0; i < vorbis_time_count; ++i) {
442 uint_fast16_t vorbis_tdtransform = get_bits(gb, 16);
444 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
446 if (vorbis_tdtransform) {
447 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
454 // Process floors part
456 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
457 vorbis_floor_data *vfu, float *vec);
458 static void create_map(vorbis_context *vc, uint_fast8_t floor_number);
459 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
460 vorbis_floor_data *vfu, float *vec);
461 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
463 GetBitContext *gb = &vc->gb;
466 vc->floor_count = get_bits(gb, 6) + 1;
468 vc->floors = av_mallocz(vc->floor_count * sizeof(vorbis_floor));
470 for (i = 0; i < vc->floor_count; ++i) {
471 vorbis_floor *floor_setup = &vc->floors[i];
473 floor_setup->floor_type = get_bits(gb, 16);
475 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
477 if (floor_setup->floor_type == 1) {
478 uint_fast8_t maximum_class = 0;
479 uint_fast8_t rangebits;
480 uint_fast16_t floor1_values = 2;
482 floor_setup->decode = vorbis_floor1_decode;
484 floor_setup->data.t1.partitions = get_bits(gb, 5);
486 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
488 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
489 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
490 if (floor_setup->data.t1.partition_class[j] > maximum_class)
491 maximum_class = floor_setup->data.t1.partition_class[j];
493 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
497 AV_DEBUG(" maximum class %d \n", maximum_class);
499 floor_setup->data.t1.maximum_class = maximum_class;
501 for (j = 0; j <= maximum_class; ++j) {
502 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
503 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
505 AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]);
507 if (floor_setup->data.t1.class_subclasses[j]) {
508 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
510 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
513 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
514 int16_t bits = get_bits(gb, 8) - 1;
516 VALIDATE_INDEX(bits, vc->codebook_count)
517 floor_setup->data.t1.subclass_books[j][k] = bits;
519 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
523 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
524 floor_setup->data.t1.x_list_dim = 2;
526 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
527 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
529 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
532 rangebits = get_bits(gb, 4);
533 floor_setup->data.t1.list[0].x = 0;
534 floor_setup->data.t1.list[1].x = (1 << rangebits);
536 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
537 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
538 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
540 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
544 // Precalculate order of x coordinates - needed for decode
545 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
546 } else if (floor_setup->floor_type == 0) {
547 uint_fast8_t max_codebook_dim = 0;
549 floor_setup->decode = vorbis_floor0_decode;
551 floor_setup->data.t0.order = get_bits(gb, 8);
552 floor_setup->data.t0.rate = get_bits(gb, 16);
553 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
554 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
555 /* zero would result in a div by zero later *
557 if (floor_setup->data.t0.amplitude_bits == 0) {
558 av_log(vc->avccontext, AV_LOG_ERROR,
559 "Floor 0 amplitude bits is 0.\n");
562 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
563 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
565 /* allocate mem for booklist */
566 floor_setup->data.t0.book_list =
567 av_malloc(floor_setup->data.t0.num_books);
568 if (!floor_setup->data.t0.book_list)
570 /* read book indexes */
573 uint_fast8_t book_idx;
574 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
575 GET_VALIDATED_INDEX(floor_setup->data.t0.book_list[idx], 8, vc->codebook_count)
576 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
577 max_codebook_dim = vc->codebooks[book_idx].dimensions;
583 /* allocate mem for lsp coefficients */
585 /* codebook dim is for padding if codebook dim doesn't *
586 * divide order+1 then we need to read more data */
587 floor_setup->data.t0.lsp =
588 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
590 if (!floor_setup->data.t0.lsp)
594 #ifdef V_DEBUG /* debug output parsed headers */
595 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
596 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
597 AV_DEBUG("floor0 bark map size: %u\n",
598 floor_setup->data.t0.bark_map_size);
599 AV_DEBUG("floor0 amplitude bits: %u\n",
600 floor_setup->data.t0.amplitude_bits);
601 AV_DEBUG("floor0 amplitude offset: %u\n",
602 floor_setup->data.t0.amplitude_offset);
603 AV_DEBUG("floor0 number of books: %u\n",
604 floor_setup->data.t0.num_books);
605 AV_DEBUG("floor0 book list pointer: %p\n",
606 floor_setup->data.t0.book_list);
609 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
610 AV_DEBUG(" Book %d: %u\n",
612 floor_setup->data.t0.book_list[idx]);
617 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
624 // Process residues part
626 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
628 GetBitContext *gb = &vc->gb;
629 uint_fast8_t i, j, k;
631 vc->residue_count = get_bits(gb, 6)+1;
632 vc->residues = av_mallocz(vc->residue_count * sizeof(vorbis_residue));
634 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
636 for (i = 0; i < vc->residue_count; ++i) {
637 vorbis_residue *res_setup = &vc->residues[i];
638 uint_fast8_t cascade[64];
639 uint_fast8_t high_bits;
640 uint_fast8_t low_bits;
642 res_setup->type = get_bits(gb, 16);
644 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
646 res_setup->begin = get_bits(gb, 24);
647 res_setup->end = get_bits(gb, 24);
648 res_setup->partition_size = get_bits(gb, 24) + 1;
649 /* Validations to prevent a buffer overflow later. */
650 if (res_setup->begin>res_setup->end ||
651 res_setup->end>vc->blocksize[1] / (res_setup->type == 2 ? 1 : 2) ||
652 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
653 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1] / 2);
657 res_setup->classifications = get_bits(gb, 6) + 1;
658 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
660 AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
661 res_setup->classifications, res_setup->classbook);
663 for (j = 0; j < res_setup->classifications; ++j) {
665 low_bits = get_bits(gb, 3);
667 high_bits = get_bits(gb, 5);
668 cascade[j] = (high_bits << 3) + low_bits;
670 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
673 res_setup->maxpass = 0;
674 for (j = 0; j < res_setup->classifications; ++j) {
675 for (k = 0; k < 8; ++k) {
676 if (cascade[j]&(1 << k)) {
677 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
679 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
681 if (k>res_setup->maxpass)
682 res_setup->maxpass = k;
684 res_setup->books[j][k] = -1;
692 // Process mappings part
694 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
696 GetBitContext *gb = &vc->gb;
699 vc->mapping_count = get_bits(gb, 6)+1;
700 vc->mappings = av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
702 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
704 for (i = 0; i < vc->mapping_count; ++i) {
705 vorbis_mapping *mapping_setup = &vc->mappings[i];
707 if (get_bits(gb, 16)) {
708 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
712 mapping_setup->submaps = get_bits(gb, 4) + 1;
714 mapping_setup->submaps = 1;
718 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
719 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
720 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
721 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
722 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
723 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
726 mapping_setup->coupling_steps = 0;
729 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
731 if (get_bits(gb, 2)) {
732 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
733 return -1; // following spec.
736 if (mapping_setup->submaps>1) {
737 mapping_setup->mux = av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
738 for (j = 0; j < vc->audio_channels; ++j)
739 mapping_setup->mux[j] = get_bits(gb, 4);
742 for (j = 0; j < mapping_setup->submaps; ++j) {
743 skip_bits(gb, 8); // FIXME check?
744 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
745 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
747 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
753 // Process modes part
755 static void create_map(vorbis_context *vc, uint_fast8_t floor_number)
757 vorbis_floor *floors = vc->floors;
760 int_fast8_t blockflag;
762 int_fast32_t n; //TODO: could theoretically be smaller?
764 for (blockflag = 0; blockflag < 2; ++blockflag) {
765 n = vc->blocksize[blockflag] / 2;
766 floors[floor_number].data.t0.map[blockflag] =
767 av_malloc((n+1) * sizeof(int_fast32_t)); // n + sentinel
769 map = floors[floor_number].data.t0.map[blockflag];
770 vf = &floors[floor_number].data.t0;
772 for (idx = 0; idx < n; ++idx) {
773 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
774 ((vf->bark_map_size) /
775 BARK(vf->rate / 2.0f)));
776 if (vf->bark_map_size-1 < map[idx])
777 map[idx] = vf->bark_map_size - 1;
780 vf->map_size[blockflag] = n;
784 for (idx = 0; idx <= n; ++idx) {
785 AV_DEBUG("floor0 map: map at pos %d is %d\n",
791 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
793 GetBitContext *gb = &vc->gb;
796 vc->mode_count = get_bits(gb, 6) + 1;
797 vc->modes = av_mallocz(vc->mode_count * sizeof(vorbis_mode));
799 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
801 for (i = 0; i < vc->mode_count; ++i) {
802 vorbis_mode *mode_setup = &vc->modes[i];
804 mode_setup->blockflag = get_bits1(gb);
805 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
806 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
807 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
809 AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
814 // Process the whole setup header using the functions above
816 static int vorbis_parse_setup_hdr(vorbis_context *vc)
818 GetBitContext *gb = &vc->gb;
820 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
821 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
822 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
823 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
827 if (vorbis_parse_setup_hdr_codebooks(vc)) {
828 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
831 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
832 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
835 if (vorbis_parse_setup_hdr_floors(vc)) {
836 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
839 if (vorbis_parse_setup_hdr_residues(vc)) {
840 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
843 if (vorbis_parse_setup_hdr_mappings(vc)) {
844 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
847 if (vorbis_parse_setup_hdr_modes(vc)) {
848 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
851 if (!get_bits1(gb)) {
852 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
853 return -8; // framing flag bit unset error
859 // Process the identification header
861 static int vorbis_parse_id_hdr(vorbis_context *vc)
863 GetBitContext *gb = &vc->gb;
864 uint_fast8_t bl0, bl1;
866 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
867 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
868 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
869 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
873 vc->version = get_bits_long(gb, 32); //FIXME check 0
874 vc->audio_channels = get_bits(gb, 8);
875 if (vc->audio_channels <= 0) {
876 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
879 vc->audio_samplerate = get_bits_long(gb, 32);
880 if (vc->audio_samplerate <= 0) {
881 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
884 vc->bitrate_maximum = get_bits_long(gb, 32);
885 vc->bitrate_nominal = get_bits_long(gb, 32);
886 vc->bitrate_minimum = get_bits_long(gb, 32);
887 bl0 = get_bits(gb, 4);
888 bl1 = get_bits(gb, 4);
889 vc->blocksize[0] = (1 << bl0);
890 vc->blocksize[1] = (1 << bl1);
891 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
895 // output format int16
896 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
897 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
898 "output packets too large.\n");
901 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
902 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
904 if ((get_bits1(gb)) == 0) {
905 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
909 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float));
910 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float));
911 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(float));
912 vc->previous_window = 0;
914 ff_mdct_init(&vc->mdct[0], bl0, 1, vc->exp_bias ? -(1 << 15) : -1.0);
915 ff_mdct_init(&vc->mdct[1], bl1, 1, vc->exp_bias ? -(1 << 15) : -1.0);
917 AV_DEBUG(" 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 ",
918 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
921 BLK = vc->blocksize[0];
922 for (i = 0; i < BLK / 2; ++i) {
923 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)));
930 // Process the extradata using the functions above (identification header, setup header)
932 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
934 vorbis_context *vc = avccontext->priv_data ;
935 uint8_t *headers = avccontext->extradata;
936 int headers_len = avccontext->extradata_size;
937 uint8_t *header_start[3];
939 GetBitContext *gb = &(vc->gb);
942 vc->avccontext = avccontext;
943 dsputil_init(&vc->dsp, avccontext);
945 if (vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
950 vc->exp_bias = 15 << 23;
954 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
958 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
959 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
963 init_get_bits(gb, header_start[0], header_len[0]*8);
964 hdr_type = get_bits(gb, 8);
966 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
969 if (vorbis_parse_id_hdr(vc)) {
970 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
975 init_get_bits(gb, header_start[2], header_len[2]*8);
976 hdr_type = get_bits(gb, 8);
978 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
982 if (vorbis_parse_setup_hdr(vc)) {
983 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
988 if (vc->audio_channels > 8)
989 avccontext->channel_layout = 0;
991 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
993 avccontext->channels = vc->audio_channels;
994 avccontext->sample_rate = vc->audio_samplerate;
995 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
996 avccontext->sample_fmt = SAMPLE_FMT_S16;
1001 // Decode audiopackets -------------------------------------------------
1003 // Read and decode floor
1005 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1006 vorbis_floor_data *vfu, float *vec)
1008 vorbis_floor0 *vf = &vfu->t0;
1009 float *lsp = vf->lsp;
1010 uint_fast32_t amplitude;
1011 uint_fast32_t book_idx;
1012 uint_fast8_t blockflag = vc->modes[vc->mode_number].blockflag;
1014 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1015 if (amplitude > 0) {
1017 uint_fast16_t lsp_len = 0;
1019 vorbis_codebook codebook;
1021 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1022 if (book_idx >= vf->num_books) {
1023 av_log(vc->avccontext, AV_LOG_ERROR,
1024 "floor0 dec: booknumber too high!\n");
1028 AV_DEBUG("floor0 dec: booknumber: %u\n", book_idx);
1029 codebook = vc->codebooks[vf->book_list[book_idx]];
1031 while (lsp_len<vf->order) {
1034 AV_DEBUG("floor0 dec: book dimension: %d\n", codebook.dimensions);
1035 AV_DEBUG("floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1036 /* read temp vector */
1037 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1038 codebook.nb_bits, codebook.maxdepth)
1039 * codebook.dimensions;
1040 AV_DEBUG("floor0 dec: vector offset: %d\n", vec_off);
1041 /* copy each vector component and add last to it */
1042 for (idx = 0; idx < codebook.dimensions; ++idx)
1043 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1044 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1046 lsp_len += codebook.dimensions;
1049 /* DEBUG: output lsp coeffs */
1052 for (idx = 0; idx < lsp_len; ++idx)
1053 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1057 /* synthesize floor output vector */
1060 int order = vf->order;
1061 float wstep = M_PI / vf->bark_map_size;
1063 for (i = 0; i < order; i++)
1064 lsp[i] = 2.0f * cos(lsp[i]);
1066 AV_DEBUG("floor0 synth: map_size = %d; m = %d; wstep = %f\n",
1067 vf->map_size, order, wstep);
1070 while (i < vf->map_size[blockflag]) {
1071 int j, iter_cond = vf->map[blockflag][i];
1074 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1076 /* similar part for the q and p products */
1077 for (j = 0; j + 1 < order; j += 2) {
1078 q *= lsp[j] - two_cos_w;
1079 p *= lsp[j + 1] - two_cos_w;
1081 if (j == order) { // even order
1082 p *= p * (2.0f - two_cos_w);
1083 q *= q * (2.0f + two_cos_w);
1084 } else { // odd order
1085 q *= two_cos_w-lsp[j]; // one more time for q
1087 /* final step and square */
1088 p *= p * (4.f - two_cos_w * two_cos_w);
1092 /* calculate linear floor value */
1094 q = exp((((amplitude*vf->amplitude_offset) /
1095 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1096 - vf->amplitude_offset) * .11512925f);
1102 } while (vf->map[blockflag][i] == iter_cond);
1106 /* this channel is unused */
1110 AV_DEBUG(" Floor0 decoded\n");
1115 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
1116 vorbis_floor_data *vfu, float *vec)
1118 vorbis_floor1 *vf = &vfu->t1;
1119 GetBitContext *gb = &vc->gb;
1120 uint_fast16_t range_v[4] = { 256, 128, 86, 64 };
1121 uint_fast16_t range = range_v[vf->multiplier-1];
1122 uint_fast16_t floor1_Y[vf->x_list_dim];
1123 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1124 int floor1_flag[vf->x_list_dim];
1125 uint_fast8_t class_;
1131 uint_fast16_t offset;
1133 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx = (unsigned)dy/adx ?
1134 int_fast16_t dy, err;
1137 if (!get_bits1(gb)) // silence
1140 // Read values (or differences) for the floor's points
1142 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1143 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1145 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1148 for (i = 0; i < vf->partitions; ++i) {
1149 class_ = vf->partition_class[i];
1150 cdim = vf->class_dimensions[class_];
1151 cbits = vf->class_subclasses[class_];
1152 csub = (1 << cbits) - 1;
1155 AV_DEBUG("Cbits %d \n", cbits);
1157 if (cbits) // this reads all subclasses for this partition's class
1158 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1159 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1161 for (j = 0; j < cdim; ++j) {
1162 book = vf->subclass_books[class_][cval & csub];
1164 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1166 cval = cval >> cbits;
1168 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1169 vc->codebooks[book].nb_bits, 3);
1171 floor1_Y[offset+j] = 0;
1174 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1179 // Amplitude calculation from the differences
1183 floor1_Y_final[0] = floor1_Y[0];
1184 floor1_Y_final[1] = floor1_Y[1];
1186 for (i = 2; i < vf->x_list_dim; ++i) {
1187 uint_fast16_t val, highroom, lowroom, room;
1188 uint_fast16_t high_neigh_offs;
1189 uint_fast16_t low_neigh_offs;
1191 low_neigh_offs = vf->list[i].low;
1192 high_neigh_offs = vf->list[i].high;
1193 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1194 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1196 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1197 off = (int16_t)err / (int16_t)adx;
1199 predicted = floor1_Y_final[low_neigh_offs] - off;
1201 predicted = floor1_Y_final[low_neigh_offs] + off;
1202 } // render_point end
1205 highroom = range-predicted;
1206 lowroom = predicted;
1207 if (highroom < lowroom) {
1208 room = highroom * 2;
1210 room = lowroom * 2; // SPEC mispelling
1213 floor1_flag[low_neigh_offs] = 1;
1214 floor1_flag[high_neigh_offs] = 1;
1217 if (highroom > lowroom) {
1218 floor1_Y_final[i] = val - lowroom + predicted;
1220 floor1_Y_final[i] = predicted - val + highroom - 1;
1224 floor1_Y_final[i] = predicted - (val + 1) / 2;
1226 floor1_Y_final[i] = predicted + val / 2;
1231 floor1_Y_final[i] = predicted;
1234 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1237 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1239 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1241 AV_DEBUG(" Floor decoded\n");
1246 // Read and decode residue
1248 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1251 uint_fast8_t *do_not_decode,
1256 GetBitContext *gb = &vc->gb;
1257 uint_fast8_t c_p_c = vc->codebooks[vr->classbook].dimensions;
1258 uint_fast16_t n_to_read = vr->end-vr->begin;
1259 uint_fast16_t ptns_to_read = n_to_read/vr->partition_size;
1260 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1262 uint_fast8_t ch_used;
1267 for (j = 1; j < ch; ++j)
1268 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1269 if (do_not_decode[0])
1276 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1278 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1279 uint_fast16_t voffset;
1280 uint_fast16_t partition_count;
1281 uint_fast16_t j_times_ptns_to_read;
1283 voffset = vr->begin;
1284 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1286 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1287 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1288 if (!do_not_decode[j]) {
1289 uint_fast32_t temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1290 vc->codebooks[vr->classbook].nb_bits, 3);
1292 AV_DEBUG("Classword: %d \n", temp);
1294 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1295 for (i = 0; i < c_p_c; ++i) {
1296 uint_fast32_t temp2;
1298 temp2 = (((uint_fast64_t)temp) * inverse_class) >> 32;
1299 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1300 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1304 j_times_ptns_to_read += ptns_to_read;
1307 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1308 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1309 uint_fast16_t voffs;
1311 if (!do_not_decode[j]) {
1312 uint_fast8_t vqclass = classifs[j_times_ptns_to_read+partition_count];
1313 int_fast16_t vqbook = vr->books[vqclass][pass];
1315 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1316 uint_fast16_t coffs;
1317 unsigned dim = vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1318 uint_fast16_t step = dim == 1 ? vr->partition_size
1319 : FASTDIV(vr->partition_size, dim);
1320 vorbis_codebook codebook = vc->codebooks[vqbook];
1324 voffs = voffset+j*vlen;
1325 for (k = 0; k < step; ++k) {
1326 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1327 for (l = 0; l < dim; ++l)
1328 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1330 } else if (vr_type == 1) {
1331 voffs = voffset + j * vlen;
1332 for (k = 0; k < step; ++k) {
1333 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1334 for (l = 0; l < dim; ++l, ++voffs) {
1335 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1337 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1340 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1341 voffs = voffset >> 1;
1344 for (k = 0; k < step; ++k) {
1345 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1346 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1347 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1349 } else if (dim == 4) {
1350 for (k = 0; k < step; ++k, voffs += 2) {
1351 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1352 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1353 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1354 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1355 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1358 for (k = 0; k < step; ++k) {
1359 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1360 for (l = 0; l < dim; l += 2, voffs++) {
1361 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1362 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1364 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset / ch + (voffs % ch) * vlen, vec[voffset / ch + (voffs % ch) * vlen], codebook.codevectors[coffs + l], coffs, l);
1368 } else if (vr_type == 2) {
1371 for (k = 0; k < step; ++k) {
1372 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1373 for (l = 0; l < dim; ++l, ++voffs) {
1374 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1376 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset / ch + (voffs % ch) * vlen, vec[voffset / ch + (voffs % ch) * vlen], codebook.codevectors[coffs + l], coffs, l);
1382 j_times_ptns_to_read += ptns_to_read;
1385 voffset += vr->partition_size;
1392 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1394 uint_fast8_t *do_not_decode,
1395 float *vec, uint_fast16_t vlen)
1398 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1399 else if (vr->type == 1)
1400 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1401 else if (vr->type == 0)
1402 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1404 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1409 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1412 for (i = 0; i < blocksize; i++) {
1415 ang[i] = mag[i] - ang[i];
1417 float temp = ang[i];
1425 float temp = ang[i];
1433 static void copy_normalize(float *dst, float *src, int len, int exp_bias,
1438 memcpy(dst, src, len * sizeof(float));
1440 for (i = 0; i < len; i++)
1441 dst[i] = src[i] + add_bias;
1445 // Decode the audio packet using the functions above
1447 static int vorbis_parse_audio_packet(vorbis_context *vc)
1449 GetBitContext *gb = &vc->gb;
1451 uint_fast8_t previous_window = vc->previous_window;
1452 uint_fast8_t mode_number;
1453 uint_fast8_t blockflag;
1454 uint_fast16_t blocksize;
1456 uint_fast8_t no_residue[vc->audio_channels];
1457 uint_fast8_t do_not_decode[vc->audio_channels];
1458 vorbis_mapping *mapping;
1459 float *ch_res_ptr = vc->channel_residues;
1460 float *ch_floor_ptr = vc->channel_floors;
1461 uint_fast8_t res_chan[vc->audio_channels];
1462 uint_fast8_t res_num = 0;
1463 int_fast16_t retlen = 0;
1464 float fadd_bias = vc->add_bias;
1466 if (get_bits1(gb)) {
1467 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1468 return -1; // packet type not audio
1471 if (vc->mode_count == 1) {
1474 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1476 vc->mode_number = mode_number;
1477 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1479 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1481 blockflag = vc->modes[mode_number].blockflag;
1482 blocksize = vc->blocksize[blockflag];
1484 skip_bits(gb, 2); // previous_window, next_window
1486 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1487 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * blocksize / 2); //FIXME can this be removed ?
1491 for (i = 0; i < vc->audio_channels; ++i) {
1492 vorbis_floor *floor;
1493 if (mapping->submaps > 1) {
1494 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1496 floor = &vc->floors[mapping->submap_floor[0]];
1499 no_residue[i] = floor->decode(vc, &floor->data, ch_floor_ptr);
1500 ch_floor_ptr += blocksize / 2;
1503 // Nonzero vector propagate
1505 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1506 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1507 no_residue[mapping->magnitude[i]] = 0;
1508 no_residue[mapping->angle[i]] = 0;
1514 for (i = 0; i < mapping->submaps; ++i) {
1515 vorbis_residue *residue;
1516 uint_fast8_t ch = 0;
1518 for (j = 0; j < vc->audio_channels; ++j) {
1519 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1520 res_chan[j] = res_num;
1521 if (no_residue[j]) {
1522 do_not_decode[ch] = 1;
1524 do_not_decode[ch] = 0;
1530 residue = &vc->residues[mapping->submap_residue[i]];
1531 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1533 ch_res_ptr += ch * blocksize / 2;
1538 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1541 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1542 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1543 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1548 for (j = vc->audio_channels-1;j >= 0; j--) {
1549 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1550 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1551 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize / 2);
1552 ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
1555 // Overlap/add, save data for next overlapping FPMATH
1557 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1558 for (j = 0; j < vc->audio_channels; j++) {
1559 uint_fast16_t bs0 = vc->blocksize[0];
1560 uint_fast16_t bs1 = vc->blocksize[1];
1561 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1562 float *saved = vc->saved + j * bs1 / 4;
1563 float *ret = vc->channel_floors + j * retlen;
1564 float *buf = residue;
1565 const float *win = vc->win[blockflag & previous_window];
1567 if (blockflag == previous_window) {
1568 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize / 4);
1569 } else if (blockflag > previous_window) {
1570 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0 / 4);
1571 copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
1573 copy_normalize(ret, saved, (bs1 - bs0) / 4, vc->exp_bias, fadd_bias);
1574 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, fadd_bias, bs0 / 4);
1576 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1579 vc->previous_window = blockflag;
1583 // Return the decoded audio packet through the standard api
1585 static int vorbis_decode_frame(AVCodecContext *avccontext,
1586 void *data, int *data_size,
1589 const uint8_t *buf = avpkt->data;
1590 int buf_size = avpkt->size;
1591 vorbis_context *vc = avccontext->priv_data ;
1592 GetBitContext *gb = &(vc->gb);
1593 const float *channel_ptrs[vc->audio_channels];
1601 AV_DEBUG("packet length %d \n", buf_size);
1603 init_get_bits(gb, buf, buf_size*8);
1605 len = vorbis_parse_audio_packet(vc);
1612 if (!vc->first_frame) {
1613 vc->first_frame = 1;
1618 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1620 if (vc->audio_channels > 8) {
1621 for (i = 0; i < vc->audio_channels; i++)
1622 channel_ptrs[i] = vc->channel_floors + i * len;
1624 for (i = 0; i < vc->audio_channels; i++)
1625 channel_ptrs[i] = vc->channel_floors +
1626 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1629 vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
1630 *data_size = len * 2 * vc->audio_channels;
1637 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1639 vorbis_context *vc = avccontext->priv_data;
1646 AVCodec vorbis_decoder = {
1650 sizeof(vorbis_context),
1653 vorbis_decode_close,
1654 vorbis_decode_frame,
1655 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1656 .channel_layouts = ff_vorbis_channel_layouts,