4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
39 #include "fmtconvert.h"
46 #define V_MAX_VLCS (1 << 16)
47 #define V_MAX_PARTITIONS (1 << 20)
58 typedef union vorbis_floor_u vorbis_floor_data;
59 typedef struct vorbis_floor0_s vorbis_floor0;
60 typedef struct vorbis_floor1_s vorbis_floor1;
61 struct vorbis_context_s;
63 int (* vorbis_floor_decode_func)
64 (struct vorbis_context_s *, vorbis_floor_data *, float *);
67 vorbis_floor_decode_func decode;
68 union vorbis_floor_u {
69 struct vorbis_floor0_s {
72 uint16_t bark_map_size;
75 uint8_t amplitude_bits;
76 uint8_t amplitude_offset;
81 struct vorbis_floor1_s {
83 uint8_t partition_class[32];
84 uint8_t class_dimensions[16];
85 uint8_t class_subclasses[16];
86 uint8_t class_masterbook[16];
87 int16_t subclass_books[16][8];
90 vorbis_floor1_entry *list;
99 unsigned partition_size;
100 uint8_t classifications;
102 int16_t books[64][8];
104 uint16_t ptns_to_read;
110 uint16_t coupling_steps;
114 uint8_t submap_floor[16];
115 uint8_t submap_residue[16];
121 uint16_t transformtype;
125 typedef struct vorbis_context_s {
126 AVCodecContext *avccontext;
130 AVFloatDSPContext fdsp;
131 FmtConvertContext fmt_conv;
136 uint8_t audio_channels;
137 uint32_t audio_samplerate;
138 uint32_t bitrate_maximum;
139 uint32_t bitrate_nominal;
140 uint32_t bitrate_minimum;
141 uint32_t blocksize[2];
143 uint16_t codebook_count;
144 vorbis_codebook *codebooks;
146 vorbis_floor *floors;
147 uint8_t residue_count;
148 vorbis_residue *residues;
149 uint8_t mapping_count;
150 vorbis_mapping *mappings;
153 uint8_t mode_number; // mode number for the current packet
154 uint8_t previous_window;
155 float *channel_residues;
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__);\
172 return AVERROR_INVALIDDATA;\
174 #define GET_VALIDATED_INDEX(idx, bits, limit) \
176 idx = get_bits(gb, bits);\
177 VALIDATE_INDEX(idx, limit)\
180 static float vorbisfloat2float(unsigned 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 ff_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 uint16_t *codebook_multiplicands;
247 vc->codebook_count = get_bits(gb, 8) + 1;
249 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
251 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
252 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
253 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
254 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
256 for (cb = 0; cb < vc->codebook_count; ++cb) {
257 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
258 unsigned ordered, t, entries, used_entries = 0;
260 av_dlog(NULL, " %u. Codebook\n", cb);
262 if (get_bits(gb, 24) != 0x564342) {
263 av_log(vc->avccontext, AV_LOG_ERROR,
264 " %u. Codebook setup data corrupt.\n", cb);
265 ret = AVERROR_INVALIDDATA;
269 codebook_setup->dimensions=get_bits(gb, 16);
270 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
271 av_log(vc->avccontext, AV_LOG_ERROR,
272 " %u. Codebook's dimension is invalid (%d).\n",
273 cb, codebook_setup->dimensions);
274 ret = AVERROR_INVALIDDATA;
277 entries = get_bits(gb, 24);
278 if (entries > V_MAX_VLCS) {
279 av_log(vc->avccontext, AV_LOG_ERROR,
280 " %u. Codebook has too many entries (%u).\n",
282 ret = AVERROR_INVALIDDATA;
286 ordered = get_bits1(gb);
288 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
289 codebook_setup->dimensions, entries);
293 unsigned sparse = get_bits1(gb);
295 av_dlog(NULL, " not ordered \n");
298 av_dlog(NULL, " sparse \n");
301 for (ce = 0; ce < entries; ++ce) {
302 flag = get_bits1(gb);
304 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
307 tmp_vlc_bits[ce] = 0;
310 av_dlog(NULL, " not sparse \n");
312 used_entries = entries;
313 for (ce = 0; ce < entries; ++ce)
314 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
317 unsigned current_entry = 0;
318 unsigned current_length = get_bits(gb, 5) + 1;
320 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
322 used_entries = entries;
323 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
326 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
328 number = get_bits(gb, ilog(entries - current_entry));
330 av_dlog(NULL, " number: %u\n", number);
332 for (i = current_entry; i < number+current_entry; ++i)
333 if (i < used_entries)
334 tmp_vlc_bits[i] = current_length;
336 current_entry+=number;
338 if (current_entry>used_entries) {
339 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
340 ret = AVERROR_INVALIDDATA;
345 codebook_setup->lookup_type = get_bits(gb, 4);
347 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
348 codebook_setup->lookup_type ? "vq" : "no lookup");
350 // If the codebook is used for (inverse) VQ, calculate codevectors.
352 if (codebook_setup->lookup_type == 1) {
354 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
356 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
357 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
358 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
359 unsigned codebook_sequence_p = get_bits1(gb);
361 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
362 codebook_lookup_values);
363 av_dlog(NULL, " delta %f minmum %f \n",
364 codebook_delta_value, codebook_minimum_value);
366 for (i = 0; i < codebook_lookup_values; ++i) {
367 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
369 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
370 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
371 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
374 // Weed out unused vlcs and build codevector vector
375 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
376 codebook_setup->dimensions *
377 sizeof(*codebook_setup->codevectors))
379 for (j = 0, i = 0; i < entries; ++i) {
380 unsigned dim = codebook_setup->dimensions;
382 if (tmp_vlc_bits[i]) {
384 unsigned lookup_offset = i;
386 av_dlog(vc->avccontext, "Lookup offset %u ,", i);
388 for (k = 0; k < dim; ++k) {
389 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
390 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
391 if (codebook_sequence_p)
392 last = codebook_setup->codevectors[j * dim + k];
393 lookup_offset/=codebook_lookup_values;
395 tmp_vlc_bits[j] = tmp_vlc_bits[i];
397 av_dlog(vc->avccontext, "real lookup offset %u, vector: ", j);
398 for (k = 0; k < dim; ++k)
399 av_dlog(vc->avccontext, " %f ",
400 codebook_setup->codevectors[j * dim + k]);
401 av_dlog(vc->avccontext, "\n");
406 if (j != used_entries) {
407 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
408 ret = AVERROR_INVALIDDATA;
411 entries = used_entries;
412 } else if (codebook_setup->lookup_type >= 2) {
413 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
414 ret = AVERROR_INVALIDDATA;
418 // Initialize VLC table
419 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
420 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
421 ret = AVERROR_INVALIDDATA;
424 codebook_setup->maxdepth = 0;
425 for (t = 0; t < entries; ++t)
426 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
427 codebook_setup->maxdepth = tmp_vlc_bits[t];
429 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
430 codebook_setup->nb_bits = V_NB_BITS2;
432 codebook_setup->nb_bits = V_NB_BITS;
434 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
436 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
437 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
438 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
439 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
441 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
446 av_free(tmp_vlc_bits);
447 av_free(tmp_vlc_codes);
448 av_free(codebook_multiplicands);
453 av_free(tmp_vlc_bits);
454 av_free(tmp_vlc_codes);
455 av_free(codebook_multiplicands);
459 // Process time domain transforms part (unused in Vorbis I)
461 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
463 GetBitContext *gb = &vc->gb;
464 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
466 for (i = 0; i < vorbis_time_count; ++i) {
467 unsigned vorbis_tdtransform = get_bits(gb, 16);
469 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
470 vorbis_time_count, vorbis_tdtransform);
472 if (vorbis_tdtransform) {
473 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
474 return AVERROR_INVALIDDATA;
480 // Process floors part
482 static int vorbis_floor0_decode(vorbis_context *vc,
483 vorbis_floor_data *vfu, float *vec);
484 static void create_map(vorbis_context *vc, unsigned floor_number);
485 static int vorbis_floor1_decode(vorbis_context *vc,
486 vorbis_floor_data *vfu, float *vec);
487 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
489 GetBitContext *gb = &vc->gb;
492 vc->floor_count = get_bits(gb, 6) + 1;
494 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
496 for (i = 0; i < vc->floor_count; ++i) {
497 vorbis_floor *floor_setup = &vc->floors[i];
499 floor_setup->floor_type = get_bits(gb, 16);
501 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
503 if (floor_setup->floor_type == 1) {
504 int maximum_class = -1;
505 unsigned rangebits, rangemax, floor1_values = 2;
507 floor_setup->decode = vorbis_floor1_decode;
509 floor_setup->data.t1.partitions = get_bits(gb, 5);
511 av_dlog(NULL, " %d.floor: %d partitions \n",
512 i, floor_setup->data.t1.partitions);
514 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
515 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
516 if (floor_setup->data.t1.partition_class[j] > maximum_class)
517 maximum_class = floor_setup->data.t1.partition_class[j];
519 av_dlog(NULL, " %d. floor %d partition class %d \n",
520 i, j, floor_setup->data.t1.partition_class[j]);
524 av_dlog(NULL, " maximum class %d \n", maximum_class);
526 for (j = 0; j <= maximum_class; ++j) {
527 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
528 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
530 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
531 floor_setup->data.t1.class_dimensions[j],
532 floor_setup->data.t1.class_subclasses[j]);
534 if (floor_setup->data.t1.class_subclasses[j]) {
535 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
537 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
540 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
541 int16_t bits = get_bits(gb, 8) - 1;
543 VALIDATE_INDEX(bits, vc->codebook_count)
544 floor_setup->data.t1.subclass_books[j][k] = bits;
546 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
550 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
551 floor_setup->data.t1.x_list_dim = 2;
553 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
554 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
556 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
557 sizeof(*floor_setup->data.t1.list));
560 rangebits = get_bits(gb, 4);
561 rangemax = (1 << rangebits);
562 if (rangemax > vc->blocksize[1] / 2) {
563 av_log(vc->avccontext, AV_LOG_ERROR,
564 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
565 rangemax, vc->blocksize[1] / 2);
566 return AVERROR_INVALIDDATA;
568 floor_setup->data.t1.list[0].x = 0;
569 floor_setup->data.t1.list[1].x = rangemax;
571 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
572 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
573 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
575 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
576 floor_setup->data.t1.list[floor1_values].x);
580 // Precalculate order of x coordinates - needed for decode
581 if (ff_vorbis_ready_floor1_list(vc->avccontext,
582 floor_setup->data.t1.list,
583 floor_setup->data.t1.x_list_dim)) {
584 return AVERROR_INVALIDDATA;
586 } else if (floor_setup->floor_type == 0) {
587 unsigned max_codebook_dim = 0;
589 floor_setup->decode = vorbis_floor0_decode;
591 floor_setup->data.t0.order = get_bits(gb, 8);
592 floor_setup->data.t0.rate = get_bits(gb, 16);
593 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
594 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
595 /* zero would result in a div by zero later *
597 if (floor_setup->data.t0.amplitude_bits == 0) {
598 av_log(vc->avccontext, AV_LOG_ERROR,
599 "Floor 0 amplitude bits is 0.\n");
600 return AVERROR_INVALIDDATA;
602 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
603 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
605 /* allocate mem for booklist */
606 floor_setup->data.t0.book_list =
607 av_malloc(floor_setup->data.t0.num_books);
608 if (!floor_setup->data.t0.book_list)
609 return AVERROR(ENOMEM);
610 /* read book indexes */
614 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
615 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
616 floor_setup->data.t0.book_list[idx] = book_idx;
617 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
618 max_codebook_dim = vc->codebooks[book_idx].dimensions;
624 /* codebook dim is for padding if codebook dim doesn't *
625 * divide order+1 then we need to read more data */
626 floor_setup->data.t0.lsp =
627 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
628 * sizeof(*floor_setup->data.t0.lsp));
629 if (!floor_setup->data.t0.lsp)
630 return AVERROR(ENOMEM);
632 /* debug output parsed headers */
633 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
634 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
635 av_dlog(NULL, "floor0 bark map size: %u\n",
636 floor_setup->data.t0.bark_map_size);
637 av_dlog(NULL, "floor0 amplitude bits: %u\n",
638 floor_setup->data.t0.amplitude_bits);
639 av_dlog(NULL, "floor0 amplitude offset: %u\n",
640 floor_setup->data.t0.amplitude_offset);
641 av_dlog(NULL, "floor0 number of books: %u\n",
642 floor_setup->data.t0.num_books);
643 av_dlog(NULL, "floor0 book list pointer: %p\n",
644 floor_setup->data.t0.book_list);
647 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
648 av_dlog(NULL, " Book %d: %u\n", idx + 1,
649 floor_setup->data.t0.book_list[idx]);
653 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
654 return AVERROR_INVALIDDATA;
660 // Process residues part
662 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
664 GetBitContext *gb = &vc->gb;
667 vc->residue_count = get_bits(gb, 6)+1;
668 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
670 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
672 for (i = 0; i < vc->residue_count; ++i) {
673 vorbis_residue *res_setup = &vc->residues[i];
675 unsigned high_bits, low_bits;
677 res_setup->type = get_bits(gb, 16);
679 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
681 res_setup->begin = get_bits(gb, 24);
682 res_setup->end = get_bits(gb, 24);
683 res_setup->partition_size = get_bits(gb, 24) + 1;
684 /* Validations to prevent a buffer overflow later. */
685 if (res_setup->begin>res_setup->end ||
686 res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
687 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
688 av_log(vc->avccontext, AV_LOG_ERROR,
689 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
690 res_setup->type, res_setup->begin, res_setup->end,
691 res_setup->partition_size, vc->blocksize[1] / 2);
692 return AVERROR_INVALIDDATA;
695 res_setup->classifications = get_bits(gb, 6) + 1;
696 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
698 res_setup->ptns_to_read =
699 (res_setup->end - res_setup->begin) / res_setup->partition_size;
700 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
702 sizeof(*res_setup->classifs));
703 if (!res_setup->classifs)
704 return AVERROR(ENOMEM);
706 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
707 res_setup->begin, res_setup->end, res_setup->partition_size,
708 res_setup->classifications, res_setup->classbook);
710 for (j = 0; j < res_setup->classifications; ++j) {
712 low_bits = get_bits(gb, 3);
714 high_bits = get_bits(gb, 5);
715 cascade[j] = (high_bits << 3) + low_bits;
717 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
720 res_setup->maxpass = 0;
721 for (j = 0; j < res_setup->classifications; ++j) {
722 for (k = 0; k < 8; ++k) {
723 if (cascade[j]&(1 << k)) {
724 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
726 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
727 j, k, res_setup->books[j][k]);
729 if (k>res_setup->maxpass)
730 res_setup->maxpass = k;
732 res_setup->books[j][k] = -1;
740 // Process mappings part
742 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
744 GetBitContext *gb = &vc->gb;
747 vc->mapping_count = get_bits(gb, 6)+1;
748 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
750 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
752 for (i = 0; i < vc->mapping_count; ++i) {
753 vorbis_mapping *mapping_setup = &vc->mappings[i];
755 if (get_bits(gb, 16)) {
756 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
757 return AVERROR_INVALIDDATA;
760 mapping_setup->submaps = get_bits(gb, 4) + 1;
762 mapping_setup->submaps = 1;
766 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
767 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
768 sizeof(*mapping_setup->magnitude));
769 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
770 sizeof(*mapping_setup->angle));
771 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
772 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
773 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
776 mapping_setup->coupling_steps = 0;
779 av_dlog(NULL, " %u mapping coupling steps: %d\n",
780 i, mapping_setup->coupling_steps);
782 if (get_bits(gb, 2)) {
783 av_log(vc->avccontext, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
784 return AVERROR_INVALIDDATA; // following spec.
787 if (mapping_setup->submaps>1) {
788 mapping_setup->mux = av_mallocz(vc->audio_channels *
789 sizeof(*mapping_setup->mux));
790 for (j = 0; j < vc->audio_channels; ++j)
791 mapping_setup->mux[j] = get_bits(gb, 4);
794 for (j = 0; j < mapping_setup->submaps; ++j) {
795 skip_bits(gb, 8); // FIXME check?
796 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
797 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
799 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
800 mapping_setup->submap_floor[j],
801 mapping_setup->submap_residue[j]);
807 // Process modes part
809 static void create_map(vorbis_context *vc, unsigned floor_number)
811 vorbis_floor *floors = vc->floors;
817 for (blockflag = 0; blockflag < 2; ++blockflag) {
818 n = vc->blocksize[blockflag] / 2;
819 floors[floor_number].data.t0.map[blockflag] =
820 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
822 map = floors[floor_number].data.t0.map[blockflag];
823 vf = &floors[floor_number].data.t0;
825 for (idx = 0; idx < n; ++idx) {
826 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
827 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
828 if (vf->bark_map_size-1 < map[idx])
829 map[idx] = vf->bark_map_size - 1;
832 vf->map_size[blockflag] = n;
835 for (idx = 0; idx <= n; ++idx) {
836 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
840 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
842 GetBitContext *gb = &vc->gb;
845 vc->mode_count = get_bits(gb, 6) + 1;
846 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
848 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
850 for (i = 0; i < vc->mode_count; ++i) {
851 vorbis_mode *mode_setup = &vc->modes[i];
853 mode_setup->blockflag = get_bits1(gb);
854 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
855 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
856 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
858 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
859 i, mode_setup->blockflag, mode_setup->windowtype,
860 mode_setup->transformtype, mode_setup->mapping);
865 // Process the whole setup header using the functions above
867 static int vorbis_parse_setup_hdr(vorbis_context *vc)
869 GetBitContext *gb = &vc->gb;
872 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
873 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
874 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
875 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
876 return AVERROR_INVALIDDATA;
879 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
880 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
883 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
884 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
887 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
888 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
891 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
892 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
895 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
899 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
900 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
903 if (!get_bits1(gb)) {
904 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
905 return AVERROR_INVALIDDATA; // framing flag bit unset error
911 // Process the identification header
913 static int vorbis_parse_id_hdr(vorbis_context *vc)
915 GetBitContext *gb = &vc->gb;
918 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
919 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
920 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
921 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
922 return AVERROR_INVALIDDATA;
925 vc->version = get_bits_long(gb, 32); //FIXME check 0
926 vc->audio_channels = get_bits(gb, 8);
927 if (vc->audio_channels <= 0) {
928 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
929 return AVERROR_INVALIDDATA;
931 vc->audio_samplerate = get_bits_long(gb, 32);
932 if (vc->audio_samplerate <= 0) {
933 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
934 return AVERROR_INVALIDDATA;
936 vc->bitrate_maximum = get_bits_long(gb, 32);
937 vc->bitrate_nominal = get_bits_long(gb, 32);
938 vc->bitrate_minimum = get_bits_long(gb, 32);
939 bl0 = get_bits(gb, 4);
940 bl1 = get_bits(gb, 4);
941 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
942 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
943 return AVERROR_INVALIDDATA;
945 vc->blocksize[0] = (1 << bl0);
946 vc->blocksize[1] = (1 << bl1);
947 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
948 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
950 if ((get_bits1(gb)) == 0) {
951 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
952 return AVERROR_INVALIDDATA;
955 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
956 vc->channel_floors = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_floors));
957 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
958 vc->previous_window = 0;
960 ff_mdct_init(&vc->mdct[0], bl0, 1, -vc->scale_bias);
961 ff_mdct_init(&vc->mdct[1], bl1, 1, -vc->scale_bias);
963 av_dlog(NULL, " vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
964 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
967 BLK = vc->blocksize[0];
968 for (i = 0; i < BLK / 2; ++i) {
969 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)));
976 // Process the extradata using the functions above (identification header, setup header)
978 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
980 vorbis_context *vc = avccontext->priv_data;
981 uint8_t *headers = avccontext->extradata;
982 int headers_len = avccontext->extradata_size;
983 uint8_t *header_start[3];
985 GetBitContext *gb = &vc->gb;
988 vc->avccontext = avccontext;
989 ff_dsputil_init(&vc->dsp, avccontext);
990 avpriv_float_dsp_init(&vc->fdsp, avccontext->flags & CODEC_FLAG_BITEXACT);
991 ff_fmt_convert_init(&vc->fmt_conv, avccontext);
993 if (avccontext->request_sample_fmt == AV_SAMPLE_FMT_FLT) {
994 avccontext->sample_fmt = AV_SAMPLE_FMT_FLT;
995 vc->scale_bias = 1.0f;
997 avccontext->sample_fmt = AV_SAMPLE_FMT_S16;
998 vc->scale_bias = 32768.0f;
1002 av_log(avccontext, AV_LOG_ERROR, "Extradata missing.\n");
1003 return AVERROR_INVALIDDATA;
1006 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1007 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1011 init_get_bits(gb, header_start[0], header_len[0]*8);
1012 hdr_type = get_bits(gb, 8);
1013 if (hdr_type != 1) {
1014 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1015 return AVERROR_INVALIDDATA;
1017 if ((ret = vorbis_parse_id_hdr(vc))) {
1018 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1023 init_get_bits(gb, header_start[2], header_len[2]*8);
1024 hdr_type = get_bits(gb, 8);
1025 if (hdr_type != 5) {
1026 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1028 return AVERROR_INVALIDDATA;
1030 if ((ret = vorbis_parse_setup_hdr(vc))) {
1031 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1036 if (vc->audio_channels > 8)
1037 avccontext->channel_layout = 0;
1039 avccontext->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1041 avccontext->channels = vc->audio_channels;
1042 avccontext->sample_rate = vc->audio_samplerate;
1044 avcodec_get_frame_defaults(&vc->frame);
1045 avccontext->coded_frame = &vc->frame;
1050 // Decode audiopackets -------------------------------------------------
1052 // Read and decode floor
1054 static int vorbis_floor0_decode(vorbis_context *vc,
1055 vorbis_floor_data *vfu, float *vec)
1057 vorbis_floor0 *vf = &vfu->t0;
1058 float *lsp = vf->lsp;
1059 unsigned amplitude, book_idx;
1060 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1062 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1063 if (amplitude > 0) {
1065 unsigned idx, lsp_len = 0;
1066 vorbis_codebook codebook;
1068 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1069 if (book_idx >= vf->num_books) {
1070 av_log(vc->avccontext, AV_LOG_ERROR,
1071 "floor0 dec: booknumber too high!\n");
1074 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1075 codebook = vc->codebooks[vf->book_list[book_idx]];
1076 /* Invalid codebook! */
1077 if (!codebook.codevectors)
1078 return AVERROR_INVALIDDATA;
1080 while (lsp_len<vf->order) {
1083 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1084 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1085 /* read temp vector */
1086 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1087 codebook.nb_bits, codebook.maxdepth)
1088 * codebook.dimensions;
1089 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1090 /* copy each vector component and add last to it */
1091 for (idx = 0; idx < codebook.dimensions; ++idx)
1092 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1093 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1095 lsp_len += codebook.dimensions;
1097 /* DEBUG: output lsp coeffs */
1100 for (idx = 0; idx < lsp_len; ++idx)
1101 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1104 /* synthesize floor output vector */
1107 int order = vf->order;
1108 float wstep = M_PI / vf->bark_map_size;
1110 for (i = 0; i < order; i++)
1111 lsp[i] = 2.0f * cos(lsp[i]);
1113 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1114 vf->map_size[blockflag], order, wstep);
1117 while (i < vf->map_size[blockflag]) {
1118 int j, iter_cond = vf->map[blockflag][i];
1121 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1123 /* similar part for the q and p products */
1124 for (j = 0; j + 1 < order; j += 2) {
1125 q *= lsp[j] - two_cos_w;
1126 p *= lsp[j + 1] - two_cos_w;
1128 if (j == order) { // even order
1129 p *= p * (2.0f - two_cos_w);
1130 q *= q * (2.0f + two_cos_w);
1131 } else { // odd order
1132 q *= two_cos_w-lsp[j]; // one more time for q
1134 /* final step and square */
1135 p *= p * (4.f - two_cos_w * two_cos_w);
1139 /* calculate linear floor value */
1140 q = exp((((amplitude*vf->amplitude_offset) /
1141 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1142 - vf->amplitude_offset) * .11512925f);
1147 } while (vf->map[blockflag][i] == iter_cond);
1151 /* this channel is unused */
1155 av_dlog(NULL, " Floor0 decoded\n");
1160 static int vorbis_floor1_decode(vorbis_context *vc,
1161 vorbis_floor_data *vfu, float *vec)
1163 vorbis_floor1 *vf = &vfu->t1;
1164 GetBitContext *gb = &vc->gb;
1165 uint16_t range_v[4] = { 256, 128, 86, 64 };
1166 unsigned range = range_v[vf->multiplier - 1];
1167 uint16_t floor1_Y[258];
1168 uint16_t floor1_Y_final[258];
1169 int floor1_flag[258];
1170 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1171 int book, adx, ady, dy, off, predicted, err;
1174 if (!get_bits1(gb)) // silence
1177 // Read values (or differences) for the floor's points
1179 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1180 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1182 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1185 for (i = 0; i < vf->partitions; ++i) {
1186 partition_class = vf->partition_class[i];
1187 cdim = vf->class_dimensions[partition_class];
1188 cbits = vf->class_subclasses[partition_class];
1189 csub = (1 << cbits) - 1;
1192 av_dlog(NULL, "Cbits %u\n", cbits);
1194 if (cbits) // this reads all subclasses for this partition's class
1195 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1196 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1198 for (j = 0; j < cdim; ++j) {
1199 book = vf->subclass_books[partition_class][cval & csub];
1201 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1202 book, cbits, cval, get_bits_count(gb));
1204 cval = cval >> cbits;
1206 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1207 vc->codebooks[book].nb_bits, 3);
1209 floor1_Y[offset+j] = 0;
1212 av_dlog(NULL, " floor(%d) = %d \n",
1213 vf->list[offset+j].x, floor1_Y[offset+j]);
1218 // Amplitude calculation from the differences
1222 floor1_Y_final[0] = floor1_Y[0];
1223 floor1_Y_final[1] = floor1_Y[1];
1225 for (i = 2; i < vf->x_list_dim; ++i) {
1226 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1228 low_neigh_offs = vf->list[i].low;
1229 high_neigh_offs = vf->list[i].high;
1230 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1231 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1233 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1236 predicted = floor1_Y_final[low_neigh_offs] - off;
1238 predicted = floor1_Y_final[low_neigh_offs] + off;
1239 } // render_point end
1242 highroom = range-predicted;
1243 lowroom = predicted;
1244 if (highroom < lowroom) {
1245 room = highroom * 2;
1247 room = lowroom * 2; // SPEC mispelling
1250 floor1_flag[low_neigh_offs] = 1;
1251 floor1_flag[high_neigh_offs] = 1;
1254 if (highroom > lowroom) {
1255 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1257 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1261 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1263 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1268 floor1_Y_final[i] = av_clip_uint16(predicted);
1271 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1272 vf->list[i].x, floor1_Y_final[i], val);
1275 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1277 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1279 av_dlog(NULL, " Floor decoded\n");
1284 // Read and decode residue
1286 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1289 uint8_t *do_not_decode,
1295 GetBitContext *gb = &vc->gb;
1296 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1297 unsigned ptns_to_read = vr->ptns_to_read;
1298 uint8_t *classifs = vr->classifs;
1299 unsigned pass, ch_used, i, j, k, l;
1300 unsigned max_output = (ch - 1) * vlen;
1303 for (j = 1; j < ch; ++j)
1304 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1305 if (do_not_decode[0])
1308 max_output += vr->end / ch;
1311 max_output += vr->end;
1314 if (max_output > ch_left * vlen) {
1315 av_log(vc->avccontext, AV_LOG_ERROR, "Insufficient output buffer\n");
1319 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1321 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1322 uint16_t voffset, partition_count, j_times_ptns_to_read;
1324 voffset = vr->begin;
1325 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1327 unsigned inverse_class = ff_inverse[vr->classifications];
1328 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1329 if (!do_not_decode[j]) {
1330 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1331 vc->codebooks[vr->classbook].nb_bits, 3);
1333 av_dlog(NULL, "Classword: %u\n", temp);
1335 av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1336 for (i = 0; i < c_p_c; ++i) {
1339 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1340 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1341 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1345 j_times_ptns_to_read += ptns_to_read;
1348 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1349 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1352 if (!do_not_decode[j]) {
1353 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1354 int vqbook = vr->books[vqclass][pass];
1356 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1358 unsigned dim = vc->codebooks[vqbook].dimensions;
1359 unsigned step = dim == 1 ? vr->partition_size
1360 : FASTDIV(vr->partition_size, dim);
1361 vorbis_codebook codebook = vc->codebooks[vqbook];
1365 voffs = voffset+j*vlen;
1366 for (k = 0; k < step; ++k) {
1367 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1368 for (l = 0; l < dim; ++l)
1369 vec[voffs + k + l * step] += codebook.codevectors[coffs + l]; // FPMATH
1371 } else if (vr_type == 1) {
1372 voffs = voffset + j * vlen;
1373 for (k = 0; k < step; ++k) {
1374 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1375 for (l = 0; l < dim; ++l, ++voffs) {
1376 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1378 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1379 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1382 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1383 voffs = voffset >> 1;
1386 for (k = 0; k < step; ++k) {
1387 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1388 vec[voffs + k ] += codebook.codevectors[coffs ]; // FPMATH
1389 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1]; // FPMATH
1391 } else if (dim == 4) {
1392 for (k = 0; k < step; ++k, voffs += 2) {
1393 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1394 vec[voffs ] += codebook.codevectors[coffs ]; // FPMATH
1395 vec[voffs + 1 ] += codebook.codevectors[coffs + 2]; // FPMATH
1396 vec[voffs + vlen ] += codebook.codevectors[coffs + 1]; // FPMATH
1397 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3]; // FPMATH
1400 for (k = 0; k < step; ++k) {
1401 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1402 for (l = 0; l < dim; l += 2, voffs++) {
1403 vec[voffs ] += codebook.codevectors[coffs + l ]; // FPMATH
1404 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1]; // FPMATH
1406 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1407 pass, voffset / ch + (voffs % ch) * vlen,
1408 vec[voffset / ch + (voffs % ch) * vlen],
1409 codebook.codevectors[coffs + l], coffs, l);
1413 } else if (vr_type == 2) {
1414 unsigned voffs_div = ch == 1 ? voffset : FASTDIV(voffset, ch);
1415 unsigned voffs_mod = voffset - voffs_div * ch;
1417 for (k = 0; k < step; ++k) {
1418 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1419 for (l = 0; l < dim; ++l) {
1420 vec[voffs_div + voffs_mod * vlen] +=
1421 codebook.codevectors[coffs + l];
1423 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1424 pass, voffs_div + voffs_mod * vlen,
1425 vec[voffs_div + voffs_mod * vlen],
1426 codebook.codevectors[coffs + l], coffs, l);
1428 if (++voffs_mod == ch) {
1437 j_times_ptns_to_read += ptns_to_read;
1440 voffset += vr->partition_size;
1447 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1449 uint8_t *do_not_decode,
1450 float *vec, unsigned vlen,
1454 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1455 else if (vr->type == 1)
1456 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1457 else if (vr->type == 0)
1458 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1460 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1461 return AVERROR_INVALIDDATA;
1465 void ff_vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1468 for (i = 0; i < blocksize; i++) {
1471 ang[i] = mag[i] - ang[i];
1473 float temp = ang[i];
1481 float temp = ang[i];
1489 // Decode the audio packet using the functions above
1491 static int vorbis_parse_audio_packet(vorbis_context *vc)
1493 GetBitContext *gb = &vc->gb;
1495 unsigned previous_window = vc->previous_window;
1496 unsigned mode_number, blockflag, blocksize;
1498 uint8_t no_residue[255];
1499 uint8_t do_not_decode[255];
1500 vorbis_mapping *mapping;
1501 float *ch_res_ptr = vc->channel_residues;
1502 float *ch_floor_ptr = vc->channel_floors;
1503 uint8_t res_chan[255];
1504 unsigned res_num = 0;
1506 unsigned ch_left = vc->audio_channels;
1509 if (get_bits1(gb)) {
1510 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1511 return AVERROR_INVALIDDATA; // packet type not audio
1514 if (vc->mode_count == 1) {
1517 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1519 vc->mode_number = mode_number;
1520 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1522 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1523 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1525 blockflag = vc->modes[mode_number].blockflag;
1526 blocksize = vc->blocksize[blockflag];
1527 vlen = blocksize / 2;
1529 previous_window = get_bits(gb, 1);
1530 skip_bits1(gb); // next_window
1533 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1534 memset(ch_floor_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1538 for (i = 0; i < vc->audio_channels; ++i) {
1539 vorbis_floor *floor;
1541 if (mapping->submaps > 1) {
1542 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1544 floor = &vc->floors[mapping->submap_floor[0]];
1547 ret = floor->decode(vc, &floor->data, ch_floor_ptr);
1550 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1551 return AVERROR_INVALIDDATA;
1553 no_residue[i] = ret;
1554 ch_floor_ptr += vlen;
1557 // Nonzero vector propagate
1559 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1560 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1561 no_residue[mapping->magnitude[i]] = 0;
1562 no_residue[mapping->angle[i]] = 0;
1568 for (i = 0; i < mapping->submaps; ++i) {
1569 vorbis_residue *residue;
1573 for (j = 0; j < vc->audio_channels; ++j) {
1574 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1575 res_chan[j] = res_num;
1576 if (no_residue[j]) {
1577 do_not_decode[ch] = 1;
1579 do_not_decode[ch] = 0;
1585 residue = &vc->residues[mapping->submap_residue[i]];
1587 av_log(vc->avccontext, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1591 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1596 ch_res_ptr += ch * vlen;
1601 return AVERROR_INVALIDDATA;
1605 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1608 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1609 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1610 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1615 mdct = &vc->mdct[blockflag];
1617 for (j = vc->audio_channels-1;j >= 0; j--) {
1618 ch_floor_ptr = vc->channel_floors + j * blocksize / 2;
1619 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1620 vc->fdsp.vector_fmul(ch_floor_ptr, ch_floor_ptr, ch_res_ptr, blocksize / 2);
1621 mdct->imdct_half(mdct, ch_res_ptr, ch_floor_ptr);
1624 // Overlap/add, save data for next overlapping FPMATH
1626 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1627 for (j = 0; j < vc->audio_channels; j++) {
1628 unsigned bs0 = vc->blocksize[0];
1629 unsigned bs1 = vc->blocksize[1];
1630 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1631 float *saved = vc->saved + j * bs1 / 4;
1632 float *ret = vc->channel_floors + j * retlen;
1633 float *buf = residue;
1634 const float *win = vc->win[blockflag & previous_window];
1636 if (blockflag == previous_window) {
1637 vc->dsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1638 } else if (blockflag > previous_window) {
1639 vc->dsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1640 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1642 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1643 vc->dsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1645 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1648 vc->previous_window = blockflag;
1652 // Return the decoded audio packet through the standard api
1654 static int vorbis_decode_frame(AVCodecContext *avccontext, void *data,
1655 int *got_frame_ptr, AVPacket *avpkt)
1657 const uint8_t *buf = avpkt->data;
1658 int buf_size = avpkt->size;
1659 vorbis_context *vc = avccontext->priv_data;
1660 GetBitContext *gb = &vc->gb;
1661 const float *channel_ptrs[255];
1664 av_dlog(NULL, "packet length %d \n", buf_size);
1666 init_get_bits(gb, buf, buf_size*8);
1668 if ((len = vorbis_parse_audio_packet(vc)) <= 0)
1671 if (!vc->first_frame) {
1672 vc->first_frame = 1;
1677 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1678 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1680 /* get output buffer */
1681 vc->frame.nb_samples = len;
1682 if ((ret = avccontext->get_buffer(avccontext, &vc->frame)) < 0) {
1683 av_log(avccontext, AV_LOG_ERROR, "get_buffer() failed\n");
1687 if (vc->audio_channels > 8) {
1688 for (i = 0; i < vc->audio_channels; i++)
1689 channel_ptrs[i] = vc->channel_floors + i * len;
1691 for (i = 0; i < vc->audio_channels; i++)
1692 channel_ptrs[i] = vc->channel_floors +
1693 len * ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1696 if (avccontext->sample_fmt == AV_SAMPLE_FMT_FLT)
1697 vc->fmt_conv.float_interleave((float *)vc->frame.data[0], channel_ptrs,
1698 len, vc->audio_channels);
1700 vc->fmt_conv.float_to_int16_interleave((int16_t *)vc->frame.data[0],
1702 vc->audio_channels);
1705 *(AVFrame *)data = vc->frame;
1712 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1714 vorbis_context *vc = avccontext->priv_data;
1721 static av_cold void vorbis_decode_flush(AVCodecContext *avccontext)
1723 vorbis_context *vc = avccontext->priv_data;
1726 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1727 sizeof(*vc->saved));
1729 vc->previous_window = 0;
1732 AVCodec ff_vorbis_decoder = {
1734 .type = AVMEDIA_TYPE_AUDIO,
1735 .id = CODEC_ID_VORBIS,
1736 .priv_data_size = sizeof(vorbis_context),
1737 .init = vorbis_decode_init,
1738 .close = vorbis_decode_close,
1739 .decode = vorbis_decode_frame,
1740 .flush = vorbis_decode_flush,
1741 .capabilities = CODEC_CAP_DR1,
1742 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1743 .channel_layouts = ff_vorbis_channel_layouts,
1744 .sample_fmts = (const enum AVSampleFormat[]) {
1745 AV_SAMPLE_FMT_FLT, AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE