4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of Libav.
8 * Libav 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 * Libav 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 Libav; 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
34 #include "fmtconvert.h"
41 #define V_MAX_VLCS (1 << 16)
42 #define V_MAX_PARTITIONS (1 << 20)
52 uint_fast8_t dimensions;
53 uint_fast8_t lookup_type;
54 uint_fast8_t maxdepth;
60 typedef union vorbis_floor_u vorbis_floor_data;
61 typedef struct vorbis_floor0_s vorbis_floor0;
62 typedef struct vorbis_floor1_s vorbis_floor1;
63 struct vorbis_context_s;
65 int (* vorbis_floor_decode_func)
66 (struct vorbis_context_s *, vorbis_floor_data *, float *);
68 uint_fast8_t floor_type;
69 vorbis_floor_decode_func decode;
70 union vorbis_floor_u {
71 struct vorbis_floor0_s {
74 uint_fast16_t bark_map_size;
76 uint_fast32_t map_size[2];
77 uint_fast8_t amplitude_bits;
78 uint_fast8_t amplitude_offset;
79 uint_fast8_t num_books;
80 uint_fast8_t *book_list;
83 struct vorbis_floor1_s {
84 uint_fast8_t partitions;
85 uint8_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 unsigned partition_size;
102 uint_fast8_t classifications;
103 uint_fast8_t classbook;
104 int_fast16_t books[64][8];
105 uint_fast8_t maxpass;
106 uint_fast16_t ptns_to_read;
111 uint_fast8_t submaps;
112 uint_fast16_t coupling_steps;
113 uint_fast8_t *magnitude;
116 uint_fast8_t submap_floor[16];
117 uint_fast8_t submap_residue[16];
121 uint_fast8_t blockflag;
122 uint_fast16_t windowtype;
123 uint_fast16_t transformtype;
124 uint_fast8_t mapping;
127 typedef struct vorbis_context_s {
128 AVCodecContext *avccontext;
131 FmtConvertContext fmt_conv;
134 uint_fast8_t first_frame;
135 uint_fast32_t version;
136 uint_fast8_t audio_channels;
137 uint_fast32_t audio_samplerate;
138 uint_fast32_t bitrate_maximum;
139 uint_fast32_t bitrate_nominal;
140 uint_fast32_t bitrate_minimum;
141 uint_fast32_t blocksize[2];
143 uint_fast16_t codebook_count;
144 vorbis_codebook *codebooks;
145 uint_fast8_t floor_count;
146 vorbis_floor *floors;
147 uint_fast8_t residue_count;
148 vorbis_residue *residues;
149 uint_fast8_t mapping_count;
150 vorbis_mapping *mappings;
151 uint_fast8_t mode_count;
153 uint_fast8_t mode_number; // mode number for the current packet
154 uint_fast8_t previous_window;
155 float *channel_residues;
156 float *channel_floors;
158 float scale_bias; // for float->int conversion
161 /* Helper functions */
164 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
166 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
167 #define VALIDATE_INDEX(idx, limit) \
169 av_log(vc->avccontext, AV_LOG_ERROR,\
171 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
174 #define GET_VALIDATED_INDEX(idx, bits, limit) \
176 idx = get_bits(gb, bits);\
177 VALIDATE_INDEX(idx, limit)\
180 static float vorbisfloat2float(uint_fast32_t val)
182 double mant = val & 0x1fffff;
183 long exp = (val & 0x7fe00000L) >> 21;
184 if (val & 0x80000000)
186 return ldexp(mant, exp - 20 - 768);
190 // Free all allocated memory -----------------------------------------
192 static void vorbis_free(vorbis_context *vc)
196 av_freep(&vc->channel_residues);
197 av_freep(&vc->channel_floors);
198 av_freep(&vc->saved);
200 for (i = 0; i < vc->residue_count; i++)
201 av_free(vc->residues[i].classifs);
202 av_freep(&vc->residues);
203 av_freep(&vc->modes);
205 ff_mdct_end(&vc->mdct[0]);
206 ff_mdct_end(&vc->mdct[1]);
208 for (i = 0; i < vc->codebook_count; ++i) {
209 av_free(vc->codebooks[i].codevectors);
210 free_vlc(&vc->codebooks[i].vlc);
212 av_freep(&vc->codebooks);
214 for (i = 0; i < vc->floor_count; ++i) {
215 if (vc->floors[i].floor_type == 0) {
216 av_free(vc->floors[i].data.t0.map[0]);
217 av_free(vc->floors[i].data.t0.map[1]);
218 av_free(vc->floors[i].data.t0.book_list);
219 av_free(vc->floors[i].data.t0.lsp);
221 av_free(vc->floors[i].data.t1.list);
224 av_freep(&vc->floors);
226 for (i = 0; i < vc->mapping_count; ++i) {
227 av_free(vc->mappings[i].magnitude);
228 av_free(vc->mappings[i].angle);
229 av_free(vc->mappings[i].mux);
231 av_freep(&vc->mappings);
234 // Parse setup header -------------------------------------------------
236 // Process codebooks part
238 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
241 uint8_t *tmp_vlc_bits;
242 uint32_t *tmp_vlc_codes;
243 GetBitContext *gb = &vc->gb;
244 uint_fast16_t *codebook_multiplicands;
246 vc->codebook_count = get_bits(gb, 8) + 1;
248 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
250 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
251 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
252 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
253 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
255 for (cb = 0; cb < vc->codebook_count; ++cb) {
256 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
257 uint_fast8_t ordered;
258 uint_fast32_t t, used_entries = 0;
259 uint_fast32_t entries;
261 AV_DEBUG(" %d. Codebook \n", cb);
263 if (get_bits(gb, 24) != 0x564342) {
264 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
268 codebook_setup->dimensions=get_bits(gb, 16);
269 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
270 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions);
273 entries = get_bits(gb, 24);
274 if (entries > V_MAX_VLCS) {
275 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
279 ordered = get_bits1(gb);
281 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
286 uint_fast8_t sparse = get_bits1(gb);
288 AV_DEBUG(" not ordered \n");
291 AV_DEBUG(" sparse \n");
294 for (ce = 0; ce < entries; ++ce) {
295 flag = get_bits1(gb);
297 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
300 tmp_vlc_bits[ce] = 0;
303 AV_DEBUG(" not sparse \n");
305 used_entries = entries;
306 for (ce = 0; ce < entries; ++ce)
307 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
310 uint_fast16_t current_entry = 0;
311 uint_fast8_t current_length = get_bits(gb, 5)+1;
313 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
315 used_entries = entries;
316 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
317 uint_fast16_t i, number;
319 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
321 number = get_bits(gb, ilog(entries - current_entry));
323 AV_DEBUG(" number: %d \n", number);
325 for (i = current_entry; i < number+current_entry; ++i)
326 if (i < used_entries)
327 tmp_vlc_bits[i] = current_length;
329 current_entry+=number;
331 if (current_entry>used_entries) {
332 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
337 codebook_setup->lookup_type = get_bits(gb, 4);
339 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup");
341 // If the codebook is used for (inverse) VQ, calculate codevectors.
343 if (codebook_setup->lookup_type == 1) {
344 uint_fast16_t i, j, k;
345 uint_fast16_t codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
347 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
348 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
349 uint_fast8_t codebook_value_bits = get_bits(gb, 4)+1;
350 uint_fast8_t codebook_sequence_p = get_bits1(gb);
352 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
353 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
355 for (i = 0; i < codebook_lookup_values; ++i) {
356 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
358 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
359 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
362 // Weed out unused vlcs and build codevector vector
363 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
364 for (j = 0, i = 0; i < entries; ++i) {
365 uint_fast8_t dim = codebook_setup->dimensions;
367 if (tmp_vlc_bits[i]) {
369 uint_fast32_t lookup_offset = i;
372 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
375 for (k = 0; k < dim; ++k) {
376 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
377 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
378 if (codebook_sequence_p)
379 last = codebook_setup->codevectors[j * dim + k];
380 lookup_offset/=codebook_lookup_values;
382 tmp_vlc_bits[j] = tmp_vlc_bits[i];
385 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
386 for (k = 0; k < dim; ++k)
387 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j * dim + k]);
388 av_log(vc->avccontext, AV_LOG_INFO, "\n");
394 if (j != used_entries) {
395 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
398 entries = used_entries;
399 } else if (codebook_setup->lookup_type >= 2) {
400 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
404 // Initialize VLC table
405 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
406 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
409 codebook_setup->maxdepth = 0;
410 for (t = 0; t < entries; ++t)
411 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
412 codebook_setup->maxdepth = tmp_vlc_bits[t];
414 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
415 codebook_setup->nb_bits = V_NB_BITS2;
417 codebook_setup->nb_bits = V_NB_BITS;
419 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
421 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)) {
422 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
427 av_free(tmp_vlc_bits);
428 av_free(tmp_vlc_codes);
429 av_free(codebook_multiplicands);
434 av_free(tmp_vlc_bits);
435 av_free(tmp_vlc_codes);
436 av_free(codebook_multiplicands);
440 // Process time domain transforms part (unused in Vorbis I)
442 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
444 GetBitContext *gb = &vc->gb;
446 uint_fast8_t vorbis_time_count = get_bits(gb, 6) + 1;
448 for (i = 0; i < vorbis_time_count; ++i) {
449 uint_fast16_t vorbis_tdtransform = get_bits(gb, 16);
451 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
453 if (vorbis_tdtransform) {
454 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
461 // Process floors part
463 static int vorbis_floor0_decode(vorbis_context *vc,
464 vorbis_floor_data *vfu, float *vec);
465 static void create_map(vorbis_context *vc, uint_fast8_t floor_number);
466 static int vorbis_floor1_decode(vorbis_context *vc,
467 vorbis_floor_data *vfu, float *vec);
468 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
470 GetBitContext *gb = &vc->gb;
473 vc->floor_count = get_bits(gb, 6) + 1;
475 vc->floors = av_mallocz(vc->floor_count * sizeof(vorbis_floor));
477 for (i = 0; i < vc->floor_count; ++i) {
478 vorbis_floor *floor_setup = &vc->floors[i];
480 floor_setup->floor_type = get_bits(gb, 16);
482 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
484 if (floor_setup->floor_type == 1) {
485 int maximum_class = -1;
486 uint_fast8_t rangebits;
487 uint_fast32_t rangemax;
488 uint_fast16_t floor1_values = 2;
490 floor_setup->decode = vorbis_floor1_decode;
492 floor_setup->data.t1.partitions = get_bits(gb, 5);
494 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
496 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
497 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
498 if (floor_setup->data.t1.partition_class[j] > maximum_class)
499 maximum_class = floor_setup->data.t1.partition_class[j];
501 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
505 AV_DEBUG(" maximum class %d \n", maximum_class);
507 for (j = 0; j <= maximum_class; ++j) {
508 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
509 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
511 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]);
513 if (floor_setup->data.t1.class_subclasses[j]) {
514 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
516 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
519 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
520 int16_t bits = get_bits(gb, 8) - 1;
522 VALIDATE_INDEX(bits, vc->codebook_count)
523 floor_setup->data.t1.subclass_books[j][k] = bits;
525 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
529 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
530 floor_setup->data.t1.x_list_dim = 2;
532 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
533 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
535 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
538 rangebits = get_bits(gb, 4);
539 rangemax = (1 << rangebits);
540 if (rangemax > vc->blocksize[1] / 2) {
541 av_log(vc->avccontext, AV_LOG_ERROR,
542 "Floor value is too large for blocksize: %d (%d)\n",
543 rangemax, vc->blocksize[1] / 2);
546 floor_setup->data.t1.list[0].x = 0;
547 floor_setup->data.t1.list[1].x = rangemax;
549 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
550 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
551 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
553 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
557 // Precalculate order of x coordinates - needed for decode
558 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
559 } else if (floor_setup->floor_type == 0) {
560 uint_fast8_t max_codebook_dim = 0;
562 floor_setup->decode = vorbis_floor0_decode;
564 floor_setup->data.t0.order = get_bits(gb, 8);
565 floor_setup->data.t0.rate = get_bits(gb, 16);
566 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
567 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
568 /* zero would result in a div by zero later *
570 if (floor_setup->data.t0.amplitude_bits == 0) {
571 av_log(vc->avccontext, AV_LOG_ERROR,
572 "Floor 0 amplitude bits is 0.\n");
575 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
576 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
578 /* allocate mem for booklist */
579 floor_setup->data.t0.book_list =
580 av_malloc(floor_setup->data.t0.num_books);
581 if (!floor_setup->data.t0.book_list)
583 /* read book indexes */
586 uint_fast8_t book_idx;
587 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
588 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
589 floor_setup->data.t0.book_list[idx] = book_idx;
590 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
591 max_codebook_dim = vc->codebooks[book_idx].dimensions;
597 /* codebook dim is for padding if codebook dim doesn't *
598 * divide order+1 then we need to read more data */
599 floor_setup->data.t0.lsp =
600 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
602 if (!floor_setup->data.t0.lsp)
605 #ifdef V_DEBUG /* debug output parsed headers */
606 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
607 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
608 AV_DEBUG("floor0 bark map size: %u\n",
609 floor_setup->data.t0.bark_map_size);
610 AV_DEBUG("floor0 amplitude bits: %u\n",
611 floor_setup->data.t0.amplitude_bits);
612 AV_DEBUG("floor0 amplitude offset: %u\n",
613 floor_setup->data.t0.amplitude_offset);
614 AV_DEBUG("floor0 number of books: %u\n",
615 floor_setup->data.t0.num_books);
616 AV_DEBUG("floor0 book list pointer: %p\n",
617 floor_setup->data.t0.book_list);
620 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
621 AV_DEBUG(" Book %d: %u\n",
623 floor_setup->data.t0.book_list[idx]);
628 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
635 // Process residues part
637 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
639 GetBitContext *gb = &vc->gb;
640 uint_fast8_t i, j, k;
642 vc->residue_count = get_bits(gb, 6)+1;
643 vc->residues = av_mallocz(vc->residue_count * sizeof(vorbis_residue));
645 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
647 for (i = 0; i < vc->residue_count; ++i) {
648 vorbis_residue *res_setup = &vc->residues[i];
649 uint_fast8_t cascade[64];
650 uint_fast8_t high_bits;
651 uint_fast8_t low_bits;
653 res_setup->type = get_bits(gb, 16);
655 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
657 res_setup->begin = get_bits(gb, 24);
658 res_setup->end = get_bits(gb, 24);
659 res_setup->partition_size = get_bits(gb, 24) + 1;
660 /* Validations to prevent a buffer overflow later. */
661 if (res_setup->begin>res_setup->end ||
662 res_setup->end > vc->avccontext->channels * vc->blocksize[1] / 2 ||
663 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
664 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %u, %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1] / 2);
668 res_setup->classifications = get_bits(gb, 6) + 1;
669 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
671 res_setup->ptns_to_read =
672 (res_setup->end - res_setup->begin) / res_setup->partition_size;
673 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
675 sizeof(*res_setup->classifs));
676 if (!res_setup->classifs)
677 return AVERROR(ENOMEM);
679 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,
680 res_setup->classifications, res_setup->classbook);
682 for (j = 0; j < res_setup->classifications; ++j) {
684 low_bits = get_bits(gb, 3);
686 high_bits = get_bits(gb, 5);
687 cascade[j] = (high_bits << 3) + low_bits;
689 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
692 res_setup->maxpass = 0;
693 for (j = 0; j < res_setup->classifications; ++j) {
694 for (k = 0; k < 8; ++k) {
695 if (cascade[j]&(1 << k)) {
696 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
698 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
700 if (k>res_setup->maxpass)
701 res_setup->maxpass = k;
703 res_setup->books[j][k] = -1;
711 // Process mappings part
713 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
715 GetBitContext *gb = &vc->gb;
718 vc->mapping_count = get_bits(gb, 6)+1;
719 vc->mappings = av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
721 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
723 for (i = 0; i < vc->mapping_count; ++i) {
724 vorbis_mapping *mapping_setup = &vc->mappings[i];
726 if (get_bits(gb, 16)) {
727 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
731 mapping_setup->submaps = get_bits(gb, 4) + 1;
733 mapping_setup->submaps = 1;
737 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
738 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
739 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
740 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
741 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
742 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
745 mapping_setup->coupling_steps = 0;
748 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
750 if (get_bits(gb, 2)) {
751 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
752 return -1; // following spec.
755 if (mapping_setup->submaps>1) {
756 mapping_setup->mux = av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
757 for (j = 0; j < vc->audio_channels; ++j)
758 mapping_setup->mux[j] = get_bits(gb, 4);
761 for (j = 0; j < mapping_setup->submaps; ++j) {
762 skip_bits(gb, 8); // FIXME check?
763 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
764 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
766 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
772 // Process modes part
774 static void create_map(vorbis_context *vc, uint_fast8_t floor_number)
776 vorbis_floor *floors = vc->floors;
779 int_fast8_t blockflag;
781 int_fast32_t n; //TODO: could theoretically be smaller?
783 for (blockflag = 0; blockflag < 2; ++blockflag) {
784 n = vc->blocksize[blockflag] / 2;
785 floors[floor_number].data.t0.map[blockflag] =
786 av_malloc((n+1) * sizeof(int_fast32_t)); // n + sentinel
788 map = floors[floor_number].data.t0.map[blockflag];
789 vf = &floors[floor_number].data.t0;
791 for (idx = 0; idx < n; ++idx) {
792 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
793 ((vf->bark_map_size) /
794 BARK(vf->rate / 2.0f)));
795 if (vf->bark_map_size-1 < map[idx])
796 map[idx] = vf->bark_map_size - 1;
799 vf->map_size[blockflag] = n;
803 for (idx = 0; idx <= n; ++idx) {
804 AV_DEBUG("floor0 map: map at pos %d is %d\n",
810 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
812 GetBitContext *gb = &vc->gb;
815 vc->mode_count = get_bits(gb, 6) + 1;
816 vc->modes = av_mallocz(vc->mode_count * sizeof(vorbis_mode));
818 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
820 for (i = 0; i < vc->mode_count; ++i) {
821 vorbis_mode *mode_setup = &vc->modes[i];
823 mode_setup->blockflag = get_bits1(gb);
824 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
825 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
826 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
828 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);
833 // Process the whole setup header using the functions above
835 static int vorbis_parse_setup_hdr(vorbis_context *vc)
837 GetBitContext *gb = &vc->gb;
839 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
840 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
841 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
842 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
846 if (vorbis_parse_setup_hdr_codebooks(vc)) {
847 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
850 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
851 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
854 if (vorbis_parse_setup_hdr_floors(vc)) {
855 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
858 if (vorbis_parse_setup_hdr_residues(vc)) {
859 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
862 if (vorbis_parse_setup_hdr_mappings(vc)) {
863 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
866 if (vorbis_parse_setup_hdr_modes(vc)) {
867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
870 if (!get_bits1(gb)) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
872 return -8; // framing flag bit unset error
878 // Process the identification header
880 static int vorbis_parse_id_hdr(vorbis_context *vc)
882 GetBitContext *gb = &vc->gb;
883 uint_fast8_t bl0, bl1;
885 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
886 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
887 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
892 vc->version = get_bits_long(gb, 32); //FIXME check 0
893 vc->audio_channels = get_bits(gb, 8);
894 if (vc->audio_channels <= 0) {
895 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
898 vc->audio_samplerate = get_bits_long(gb, 32);
899 if (vc->audio_samplerate <= 0) {
900 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
903 vc->bitrate_maximum = get_bits_long(gb, 32);
904 vc->bitrate_nominal = get_bits_long(gb, 32);
905 vc->bitrate_minimum = get_bits_long(gb, 32);
906 bl0 = get_bits(gb, 4);
907 bl1 = get_bits(gb, 4);
908 vc->blocksize[0] = (1 << bl0);
909 vc->blocksize[1] = (1 << bl1);
910 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
911 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
914 // output format int16
915 if (vc->blocksize[1] / 2 * vc->audio_channels * 2 > AVCODEC_MAX_AUDIO_FRAME_SIZE) {
916 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
917 "output packets too large.\n");
920 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
921 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
923 if ((get_bits1(gb)) == 0) {
924 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
928 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float));
929 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(float));
930 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(float));
931 vc->previous_window = 0;
933 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
934 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
936 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 ",
937 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
940 BLK = vc->blocksize[0];
941 for (i = 0; i < BLK / 2; ++i) {
942 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)));
949 // Process the extradata using the functions above (identification header, setup header)
951 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
953 vorbis_context *vc = avccontext->priv_data ;
954 uint8_t *headers = avccontext->extradata;
955 int headers_len = avccontext->extradata_size;
956 uint8_t *header_start[3];
958 GetBitContext *gb = &(vc->gb);
961 vc->avccontext = avccontext;
962 dsputil_init(&vc->dsp, avccontext);
963 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
965 vc->scale_bias = 32768.0f;
968 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
972 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
973 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
977 init_get_bits(gb, header_start[0], header_len[0]*8);
978 hdr_type = get_bits(gb, 8);
980 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
983 if (vorbis_parse_id_hdr(vc)) {
984 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
989 init_get_bits(gb, header_start[2], header_len[2]*8);
990 hdr_type = get_bits(gb, 8);
992 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
996 if (vorbis_parse_setup_hdr(vc)) {
997 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1002 if (vc->audio_channels > 8)
1003 avccontext->channel_layout = 0;
1005 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1007 avccontext->channels = vc->audio_channels;
1008 avccontext->sample_rate = vc->audio_samplerate;
1009 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1]) >> 2;
1010 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
1015 // Decode audiopackets -------------------------------------------------
1017 // Read and decode floor
1019 static int vorbis_floor0_decode(vorbis_context *vc,
1020 vorbis_floor_data *vfu, float *vec)
1022 vorbis_floor0 *vf = &vfu->t0;
1023 float *lsp = vf->lsp;
1024 uint_fast32_t amplitude;
1025 uint_fast32_t book_idx;
1026 uint_fast8_t blockflag = vc->modes[vc->mode_number].blockflag;
1028 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1029 if (amplitude > 0) {
1031 uint_fast16_t lsp_len = 0;
1033 vorbis_codebook codebook;
1035 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1036 if (book_idx >= vf->num_books) {
1037 av_log(vc->avccontext, AV_LOG_ERROR,
1038 "floor0 dec: booknumber too high!\n");
1041 AV_DEBUG("floor0 dec: booknumber: %u\n", book_idx);
1042 codebook = vc->codebooks[vf->book_list[book_idx]];
1043 /* Invalid codebook! */
1044 if (!codebook.codevectors)
1047 while (lsp_len<vf->order) {
1050 AV_DEBUG("floor0 dec: book dimension: %d\n", codebook.dimensions);
1051 AV_DEBUG("floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1052 /* read temp vector */
1053 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1054 codebook.nb_bits, codebook.maxdepth)
1055 * codebook.dimensions;
1056 AV_DEBUG("floor0 dec: vector offset: %d\n", vec_off);
1057 /* copy each vector component and add last to it */
1058 for (idx = 0; idx < codebook.dimensions; ++idx)
1059 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1060 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1062 lsp_len += codebook.dimensions;
1065 /* DEBUG: output lsp coeffs */
1068 for (idx = 0; idx < lsp_len; ++idx)
1069 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1073 /* synthesize floor output vector */
1076 int order = vf->order;
1077 float wstep = M_PI / vf->bark_map_size;
1079 for (i = 0; i < order; i++)
1080 lsp[i] = 2.0f * cos(lsp[i]);
1082 AV_DEBUG("floor0 synth: map_size = %d; m = %d; wstep = %f\n",
1083 vf->map_size, order, wstep);
1086 while (i < vf->map_size[blockflag]) {
1087 int j, iter_cond = vf->map[blockflag][i];
1090 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1092 /* similar part for the q and p products */
1093 for (j = 0; j + 1 < order; j += 2) {
1094 q *= lsp[j] - two_cos_w;
1095 p *= lsp[j + 1] - two_cos_w;
1097 if (j == order) { // even order
1098 p *= p * (2.0f - two_cos_w);
1099 q *= q * (2.0f + two_cos_w);
1100 } else { // odd order
1101 q *= two_cos_w-lsp[j]; // one more time for q
1103 /* final step and square */
1104 p *= p * (4.f - two_cos_w * two_cos_w);
1108 /* calculate linear floor value */
1109 q = exp((((amplitude*vf->amplitude_offset) /
1110 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1111 - vf->amplitude_offset) * .11512925f);
1116 } while (vf->map[blockflag][i] == iter_cond);
1120 /* this channel is unused */
1124 AV_DEBUG(" Floor0 decoded\n");
1129 static int vorbis_floor1_decode(vorbis_context *vc,
1130 vorbis_floor_data *vfu, float *vec)
1132 vorbis_floor1 *vf = &vfu->t1;
1133 GetBitContext *gb = &vc->gb;
1134 uint_fast16_t range_v[4] = { 256, 128, 86, 64 };
1135 uint_fast16_t range = range_v[vf->multiplier-1];
1136 uint_fast16_t floor1_Y[258];
1137 uint_fast16_t floor1_Y_final[258];
1138 int floor1_flag[258];
1139 uint_fast8_t class_;
1145 uint_fast16_t offset;
1147 int_fast16_t adx, ady, dy, off, predicted;
1151 if (!get_bits1(gb)) // silence
1154 // Read values (or differences) for the floor's points
1156 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1157 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1159 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1162 for (i = 0; i < vf->partitions; ++i) {
1163 class_ = vf->partition_class[i];
1164 cdim = vf->class_dimensions[class_];
1165 cbits = vf->class_subclasses[class_];
1166 csub = (1 << cbits) - 1;
1169 AV_DEBUG("Cbits %d \n", cbits);
1171 if (cbits) // this reads all subclasses for this partition's class
1172 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1173 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1175 for (j = 0; j < cdim; ++j) {
1176 book = vf->subclass_books[class_][cval & csub];
1178 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1180 cval = cval >> cbits;
1182 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1183 vc->codebooks[book].nb_bits, 3);
1185 floor1_Y[offset+j] = 0;
1188 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1193 // Amplitude calculation from the differences
1197 floor1_Y_final[0] = floor1_Y[0];
1198 floor1_Y_final[1] = floor1_Y[1];
1200 for (i = 2; i < vf->x_list_dim; ++i) {
1201 uint_fast16_t val, highroom, lowroom, room;
1202 uint_fast16_t high_neigh_offs;
1203 uint_fast16_t low_neigh_offs;
1205 low_neigh_offs = vf->list[i].low;
1206 high_neigh_offs = vf->list[i].high;
1207 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1208 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1210 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1213 predicted = floor1_Y_final[low_neigh_offs] - off;
1215 predicted = floor1_Y_final[low_neigh_offs] + off;
1216 } // render_point end
1219 highroom = range-predicted;
1220 lowroom = predicted;
1221 if (highroom < lowroom) {
1222 room = highroom * 2;
1224 room = lowroom * 2; // SPEC mispelling
1227 floor1_flag[low_neigh_offs] = 1;
1228 floor1_flag[high_neigh_offs] = 1;
1231 if (highroom > lowroom) {
1232 floor1_Y_final[i] = val - lowroom + predicted;
1234 floor1_Y_final[i] = predicted - val + highroom - 1;
1238 floor1_Y_final[i] = predicted - (val + 1) / 2;
1240 floor1_Y_final[i] = predicted + val / 2;
1245 floor1_Y_final[i] = predicted;
1248 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1251 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1253 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1255 AV_DEBUG(" Floor decoded\n");
1260 // Read and decode residue
1262 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1265 uint_fast8_t *do_not_decode,
1270 GetBitContext *gb = &vc->gb;
1271 uint_fast8_t c_p_c = vc->codebooks[vr->classbook].dimensions;
1272 uint_fast16_t ptns_to_read = vr->ptns_to_read;
1273 uint8_t *classifs = vr->classifs;
1275 uint_fast8_t ch_used;
1280 for (j = 1; j < ch; ++j)
1281 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1282 if (do_not_decode[0])
1289 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1291 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1292 uint_fast16_t voffset;
1293 uint_fast16_t partition_count;
1294 uint_fast16_t j_times_ptns_to_read;
1296 voffset = vr->begin;
1297 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1299 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1300 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1301 if (!do_not_decode[j]) {
1302 uint_fast32_t temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1303 vc->codebooks[vr->classbook].nb_bits, 3);
1305 AV_DEBUG("Classword: %d \n", temp);
1307 assert(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1308 for (i = 0; i < c_p_c; ++i) {
1309 uint_fast32_t temp2;
1311 temp2 = (((uint_fast64_t)temp) * inverse_class) >> 32;
1312 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1313 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1317 j_times_ptns_to_read += ptns_to_read;
1320 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1321 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1322 uint_fast16_t voffs;
1324 if (!do_not_decode[j]) {
1325 uint_fast8_t vqclass = classifs[j_times_ptns_to_read+partition_count];
1326 int_fast16_t vqbook = vr->books[vqclass][pass];
1328 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1329 uint_fast16_t coffs;
1330 unsigned dim = vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1331 uint_fast16_t step = dim == 1 ? vr->partition_size
1332 : FASTDIV(vr->partition_size, dim);
1333 vorbis_codebook codebook = vc->codebooks[vqbook];
1337 voffs = voffset+j*vlen;
1338 for (k = 0; k < step; ++k) {
1339 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1340 for (l = 0; l < dim; ++l)
1341 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1343 } else if (vr_type == 1) {
1344 voffs = voffset + j * vlen;
1345 for (k = 0; k < step; ++k) {
1346 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1347 for (l = 0; l < dim; ++l, ++voffs) {
1348 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1350 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1353 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1354 voffs = voffset >> 1;
1357 for (k = 0; k < step; ++k) {
1358 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1359 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1360 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1362 } else if (dim == 4) {
1363 for (k = 0; k < step; ++k, voffs += 2) {
1364 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1365 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1366 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1367 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1368 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
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 += 2, voffs++) {
1374 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1375 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1377 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);
1381 } else if (vr_type == 2) {
1384 for (k = 0; k < step; ++k) {
1385 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1386 for (l = 0; l < dim; ++l, ++voffs) {
1387 vec[voffs / ch + (voffs % ch) * vlen] += codebook.codevectors[coffs + l]; // FPMATH FIXME use if and counter instead of / and %
1389 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);
1395 j_times_ptns_to_read += ptns_to_read;
1398 voffset += vr->partition_size;
1405 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1407 uint_fast8_t *do_not_decode,
1408 float *vec, uint_fast16_t vlen)
1411 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1412 else if (vr->type == 1)
1413 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1414 else if (vr->type == 0)
1415 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1417 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1422 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1425 for (i = 0; i < blocksize; i++) {
1428 ang[i] = mag[i] - ang[i];
1430 float temp = ang[i];
1438 float temp = ang[i];
1446 // Decode the audio packet using the functions above
1448 static int vorbis_parse_audio_packet(vorbis_context *vc)
1450 GetBitContext *gb = &vc->gb;
1452 uint_fast8_t previous_window = vc->previous_window;
1453 uint_fast8_t mode_number;
1454 uint_fast8_t blockflag;
1455 uint_fast16_t blocksize;
1457 uint_fast8_t no_residue[255];
1458 uint_fast8_t do_not_decode[255];
1459 vorbis_mapping *mapping;
1460 float *ch_res_ptr = vc->channel_residues;
1461 float *ch_floor_ptr = vc->channel_floors;
1462 uint_fast8_t res_chan[255];
1463 uint_fast8_t res_num = 0;
1464 int_fast16_t retlen = 0;
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;
1494 if (mapping->submaps > 1) {
1495 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1497 floor = &vc->floors[mapping->submap_floor[0]];
1500 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1503 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1506 no_residue[i] = ret;
1507 ch_floor_ptr += blocksize / 2;
1510 // Nonzero vector propagate
1512 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1513 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1514 no_residue[mapping->magnitude[i]] = 0;
1515 no_residue[mapping->angle[i]] = 0;
1521 for (i = 0; i < mapping->submaps; ++i) {
1522 vorbis_residue *residue;
1523 uint_fast8_t ch = 0;
1525 for (j = 0; j < vc->audio_channels; ++j) {
1526 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1527 res_chan[j] = res_num;
1528 if (no_residue[j]) {
1529 do_not_decode[ch] = 1;
1531 do_not_decode[ch] = 0;
1537 residue = &vc->residues[mapping->submap_residue[i]];
1538 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1540 ch_res_ptr += ch * blocksize / 2;
1545 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1548 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1549 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1550 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1555 mdct = &vc->mdct[blockflag];
1557 for (j = vc->audio_channels-1;j >= 0; j--) {
1558 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1559 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1560 vc->dsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1561 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1564 // Overlap/add, save data for next overlapping FPMATH
1566 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1567 for (j = 0; j < vc->audio_channels; j++) {
1568 uint_fast16_t bs0 = vc->blocksize[0];
1569 uint_fast16_t bs1 = vc->blocksize[1];
1570 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1571 float *saved = vc->saved + j * bs1 / 4;
1572 float *ret = vc->channel_floors + j * retlen;
1573 float *buf = residue;
1574 const float *win = vc->win[blockflag & previous_window];
1576 if (blockflag == previous_window) {
1577 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1578 } else if (blockflag > previous_window) {
1579 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1580 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1582 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1583 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1585 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1588 vc->previous_window = blockflag;
1592 // Return the decoded audio packet through the standard api
1594 static int vorbis_decode_frame(AVCodecContext *avccontext,
1595 void *data, int *data_size,
1598 const uint8_t *buf = avpkt->data;
1599 int buf_size = avpkt->size;
1600 vorbis_context *vc = avccontext->priv_data ;
1601 GetBitContext *gb = &(vc->gb);
1602 const float *channel_ptrs[255];
1610 AV_DEBUG("packet length %d \n", buf_size);
1612 init_get_bits(gb, buf, buf_size*8);
1614 len = vorbis_parse_audio_packet(vc);
1621 if (!vc->first_frame) {
1622 vc->first_frame = 1;
1627 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1629 if (vc->audio_channels > 8) {
1630 for (i = 0; i < vc->audio_channels; i++)
1631 channel_ptrs[i] = vc->channel_floors + i * len;
1633 for (i = 0; i < vc->audio_channels; i++)
1634 channel_ptrs[i] = vc->channel_floors +
1635 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1638 vc->fmt_conv.float_to_int16_interleave(data, channel_ptrs, len,
1639 vc->audio_channels);
1640 *data_size = len * 2 * vc->audio_channels;
1647 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1649 vorbis_context *vc = avccontext->priv_data;
1656 AVCodec ff_vorbis_decoder = {
1660 sizeof(vorbis_context),
1663 vorbis_decode_close,
1664 vorbis_decode_frame,
1665 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1666 .channel_layouts = ff_vorbis_channel_layouts,