4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This file is part of FFmpeg.
8 * FFmpeg is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * FFmpeg is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with FFmpeg; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
26 * @author Denes Balatoni ( dbalatoni programozo hu )
32 #define BITSTREAM_READER_LE
33 #include "libavutil/float_dsp.h"
34 #include "libavutil/avassert.h"
38 #include "fmtconvert.h"
42 #include "vorbisdsp.h"
47 #define V_MAX_VLCS (1 << 16)
48 #define V_MAX_PARTITIONS (1 << 20)
59 typedef union vorbis_floor_u vorbis_floor_data;
60 typedef struct vorbis_floor0_s vorbis_floor0;
61 typedef struct vorbis_floor1_s vorbis_floor1;
62 struct vorbis_context_s;
64 int (* vorbis_floor_decode_func)
65 (struct vorbis_context_s *, vorbis_floor_data *, float *);
68 vorbis_floor_decode_func decode;
69 union vorbis_floor_u {
70 struct vorbis_floor0_s {
73 uint16_t bark_map_size;
76 uint8_t amplitude_bits;
77 uint8_t amplitude_offset;
82 struct vorbis_floor1_s {
84 uint8_t partition_class[32];
85 uint8_t class_dimensions[16];
86 uint8_t class_subclasses[16];
87 uint8_t class_masterbook[16];
88 int16_t subclass_books[16][8];
91 vorbis_floor1_entry *list;
100 unsigned partition_size;
101 uint8_t classifications;
103 int16_t books[64][8];
105 uint16_t ptns_to_read;
111 uint16_t coupling_steps;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
122 uint16_t transformtype;
126 typedef struct vorbis_context_s {
127 AVCodecContext *avctx;
129 VorbisDSPContext dsp;
130 AVFloatDSPContext fdsp;
131 FmtConvertContext fmt_conv;
136 uint8_t audio_channels;
137 uint32_t audio_samplerate;
138 uint32_t bitrate_maximum;
139 uint32_t bitrate_nominal;
140 uint32_t bitrate_minimum;
141 uint32_t blocksize[2];
143 uint16_t codebook_count;
144 vorbis_codebook *codebooks;
146 vorbis_floor *floors;
147 uint8_t residue_count;
148 vorbis_residue *residues;
149 uint8_t mapping_count;
150 vorbis_mapping *mappings;
153 uint8_t mode_number; // mode number for the current packet
154 uint8_t previous_window;
155 float *channel_residues;
159 /* Helper functions */
162 (13.1f * atan(0.00074f * (x)) + 2.24f * atan(1.85e-8f * (x) * (x)) + 1e-4f * (x))
164 static const char idx_err_str[] = "Index value %d out of range (0 - %d) for %s at %s:%i\n";
165 #define VALIDATE_INDEX(idx, limit) \
167 av_log(vc->avctx, AV_LOG_ERROR,\
169 (int)(idx), (int)(limit - 1), #idx, __FILE__, __LINE__);\
170 return AVERROR_INVALIDDATA;\
172 #define GET_VALIDATED_INDEX(idx, bits, limit) \
174 idx = get_bits(gb, bits);\
175 VALIDATE_INDEX(idx, limit)\
178 static float vorbisfloat2float(unsigned val)
180 double mant = val & 0x1fffff;
181 long exp = (val & 0x7fe00000L) >> 21;
182 if (val & 0x80000000)
184 return ldexp(mant, exp - 20 - 768);
188 // Free all allocated memory -----------------------------------------
190 static void vorbis_free(vorbis_context *vc)
194 av_freep(&vc->channel_residues);
195 av_freep(&vc->saved);
198 for (i = 0; i < vc->residue_count; i++)
199 av_free(vc->residues[i].classifs);
200 av_freep(&vc->residues);
201 av_freep(&vc->modes);
203 ff_mdct_end(&vc->mdct[0]);
204 ff_mdct_end(&vc->mdct[1]);
207 for (i = 0; i < vc->codebook_count; ++i) {
208 av_free(vc->codebooks[i].codevectors);
209 ff_free_vlc(&vc->codebooks[i].vlc);
211 av_freep(&vc->codebooks);
214 for (i = 0; i < vc->floor_count; ++i) {
215 if (vc->floors[i].floor_type == 0) {
216 av_free(vc->floors[i].data.t0.map[0]);
217 av_free(vc->floors[i].data.t0.map[1]);
218 av_free(vc->floors[i].data.t0.book_list);
219 av_free(vc->floors[i].data.t0.lsp);
221 av_free(vc->floors[i].data.t1.list);
224 av_freep(&vc->floors);
227 for (i = 0; i < vc->mapping_count; ++i) {
228 av_free(vc->mappings[i].magnitude);
229 av_free(vc->mappings[i].angle);
230 av_free(vc->mappings[i].mux);
232 av_freep(&vc->mappings);
235 // Parse setup header -------------------------------------------------
237 // Process codebooks part
239 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
242 uint8_t *tmp_vlc_bits = NULL;
243 uint32_t *tmp_vlc_codes = NULL;
244 GetBitContext *gb = &vc->gb;
245 uint16_t *codebook_multiplicands = NULL;
248 vc->codebook_count = get_bits(gb, 8) + 1;
250 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
252 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
253 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
254 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
255 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
256 if (!vc->codebooks ||
257 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
258 ret = AVERROR(ENOMEM);
262 for (cb = 0; cb < vc->codebook_count; ++cb) {
263 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
264 unsigned ordered, t, entries, used_entries = 0;
266 av_dlog(NULL, " %u. Codebook\n", cb);
268 if (get_bits(gb, 24) != 0x564342) {
269 av_log(vc->avctx, AV_LOG_ERROR,
270 " %u. Codebook setup data corrupt.\n", cb);
271 ret = AVERROR_INVALIDDATA;
275 codebook_setup->dimensions=get_bits(gb, 16);
276 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
277 av_log(vc->avctx, AV_LOG_ERROR,
278 " %u. Codebook's dimension is invalid (%d).\n",
279 cb, codebook_setup->dimensions);
280 ret = AVERROR_INVALIDDATA;
283 entries = get_bits(gb, 24);
284 if (entries > V_MAX_VLCS) {
285 av_log(vc->avctx, AV_LOG_ERROR,
286 " %u. Codebook has too many entries (%u).\n",
288 ret = AVERROR_INVALIDDATA;
292 ordered = get_bits1(gb);
294 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
295 codebook_setup->dimensions, entries);
299 unsigned sparse = get_bits1(gb);
301 av_dlog(NULL, " not ordered \n");
304 av_dlog(NULL, " sparse \n");
307 for (ce = 0; ce < entries; ++ce) {
308 flag = get_bits1(gb);
310 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
313 tmp_vlc_bits[ce] = 0;
316 av_dlog(NULL, " not sparse \n");
318 used_entries = entries;
319 for (ce = 0; ce < entries; ++ce)
320 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
323 unsigned current_entry = 0;
324 unsigned current_length = get_bits(gb, 5) + 1;
326 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
328 used_entries = entries;
329 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
332 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
334 number = get_bits(gb, ilog(entries - current_entry));
336 av_dlog(NULL, " number: %u\n", number);
338 for (i = current_entry; i < number+current_entry; ++i)
339 if (i < used_entries)
340 tmp_vlc_bits[i] = current_length;
342 current_entry+=number;
344 if (current_entry>used_entries) {
345 av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
346 ret = AVERROR_INVALIDDATA;
351 codebook_setup->lookup_type = get_bits(gb, 4);
353 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
354 codebook_setup->lookup_type ? "vq" : "no lookup");
356 // If the codebook is used for (inverse) VQ, calculate codevectors.
358 if (codebook_setup->lookup_type == 1) {
360 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
362 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
363 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
364 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
365 unsigned codebook_sequence_p = get_bits1(gb);
367 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
368 codebook_lookup_values);
369 av_dlog(NULL, " delta %f minmum %f \n",
370 codebook_delta_value, codebook_minimum_value);
372 for (i = 0; i < codebook_lookup_values; ++i) {
373 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
375 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
376 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
377 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
380 // Weed out unused vlcs and build codevector vector
381 codebook_setup->codevectors = used_entries ? av_mallocz(used_entries *
382 codebook_setup->dimensions *
383 sizeof(*codebook_setup->codevectors))
385 for (j = 0, i = 0; i < entries; ++i) {
386 unsigned dim = codebook_setup->dimensions;
388 if (tmp_vlc_bits[i]) {
390 unsigned lookup_offset = i;
392 av_dlog(vc->avctx, "Lookup offset %u ,", i);
394 for (k = 0; k < dim; ++k) {
395 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
396 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
397 if (codebook_sequence_p)
398 last = codebook_setup->codevectors[j * dim + k];
399 lookup_offset/=codebook_lookup_values;
401 tmp_vlc_bits[j] = tmp_vlc_bits[i];
403 av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
404 for (k = 0; k < dim; ++k)
405 av_dlog(vc->avctx, " %f ",
406 codebook_setup->codevectors[j * dim + k]);
407 av_dlog(vc->avctx, "\n");
412 if (j != used_entries) {
413 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
414 ret = AVERROR_INVALIDDATA;
417 entries = used_entries;
418 } else if (codebook_setup->lookup_type >= 2) {
419 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
420 ret = AVERROR_INVALIDDATA;
424 // Initialize VLC table
425 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
426 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
427 ret = AVERROR_INVALIDDATA;
430 codebook_setup->maxdepth = 0;
431 for (t = 0; t < entries; ++t)
432 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
433 codebook_setup->maxdepth = tmp_vlc_bits[t];
435 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
436 codebook_setup->nb_bits = V_NB_BITS2;
438 codebook_setup->nb_bits = V_NB_BITS;
440 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
442 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
443 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
444 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
445 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
447 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
452 av_free(tmp_vlc_bits);
453 av_free(tmp_vlc_codes);
454 av_free(codebook_multiplicands);
459 av_free(tmp_vlc_bits);
460 av_free(tmp_vlc_codes);
461 av_free(codebook_multiplicands);
465 // Process time domain transforms part (unused in Vorbis I)
467 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
469 GetBitContext *gb = &vc->gb;
470 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
472 for (i = 0; i < vorbis_time_count; ++i) {
473 unsigned vorbis_tdtransform = get_bits(gb, 16);
475 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
476 vorbis_time_count, vorbis_tdtransform);
478 if (vorbis_tdtransform) {
479 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
480 return AVERROR_INVALIDDATA;
486 // Process floors part
488 static int vorbis_floor0_decode(vorbis_context *vc,
489 vorbis_floor_data *vfu, float *vec);
490 static int create_map(vorbis_context *vc, unsigned floor_number);
491 static int vorbis_floor1_decode(vorbis_context *vc,
492 vorbis_floor_data *vfu, float *vec);
493 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
495 GetBitContext *gb = &vc->gb;
498 vc->floor_count = get_bits(gb, 6) + 1;
500 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
502 return AVERROR(ENOMEM);
504 for (i = 0; i < vc->floor_count; ++i) {
505 vorbis_floor *floor_setup = &vc->floors[i];
507 floor_setup->floor_type = get_bits(gb, 16);
509 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
511 if (floor_setup->floor_type == 1) {
512 int maximum_class = -1;
513 unsigned rangebits, rangemax, floor1_values = 2;
515 floor_setup->decode = vorbis_floor1_decode;
517 floor_setup->data.t1.partitions = get_bits(gb, 5);
519 av_dlog(NULL, " %d.floor: %d partitions \n",
520 i, floor_setup->data.t1.partitions);
522 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
523 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
524 if (floor_setup->data.t1.partition_class[j] > maximum_class)
525 maximum_class = floor_setup->data.t1.partition_class[j];
527 av_dlog(NULL, " %d. floor %d partition class %d \n",
528 i, j, floor_setup->data.t1.partition_class[j]);
532 av_dlog(NULL, " maximum class %d \n", maximum_class);
534 for (j = 0; j <= maximum_class; ++j) {
535 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
536 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
538 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
539 floor_setup->data.t1.class_dimensions[j],
540 floor_setup->data.t1.class_subclasses[j]);
542 if (floor_setup->data.t1.class_subclasses[j]) {
543 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
545 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
548 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
549 int16_t bits = get_bits(gb, 8) - 1;
551 VALIDATE_INDEX(bits, vc->codebook_count)
552 floor_setup->data.t1.subclass_books[j][k] = bits;
554 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
558 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
559 floor_setup->data.t1.x_list_dim = 2;
561 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
562 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
564 floor_setup->data.t1.list = av_mallocz(floor_setup->data.t1.x_list_dim *
565 sizeof(*floor_setup->data.t1.list));
566 if (!floor_setup->data.t1.list)
567 return AVERROR(ENOMEM);
569 rangebits = get_bits(gb, 4);
570 rangemax = (1 << rangebits);
571 if (rangemax > vc->blocksize[1] / 2) {
572 av_log(vc->avctx, AV_LOG_ERROR,
573 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
574 rangemax, vc->blocksize[1] / 2);
575 return AVERROR_INVALIDDATA;
577 floor_setup->data.t1.list[0].x = 0;
578 floor_setup->data.t1.list[1].x = rangemax;
580 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
581 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
582 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
584 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
585 floor_setup->data.t1.list[floor1_values].x);
589 // Precalculate order of x coordinates - needed for decode
590 if (ff_vorbis_ready_floor1_list(vc->avctx,
591 floor_setup->data.t1.list,
592 floor_setup->data.t1.x_list_dim)) {
593 return AVERROR_INVALIDDATA;
595 } else if (floor_setup->floor_type == 0) {
596 unsigned max_codebook_dim = 0;
598 floor_setup->decode = vorbis_floor0_decode;
600 floor_setup->data.t0.order = get_bits(gb, 8);
601 if (!floor_setup->data.t0.order) {
602 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
603 return AVERROR_INVALIDDATA;
605 floor_setup->data.t0.rate = get_bits(gb, 16);
606 if (!floor_setup->data.t0.rate) {
607 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
608 return AVERROR_INVALIDDATA;
610 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
611 if (!floor_setup->data.t0.bark_map_size) {
612 av_log(vc->avctx, AV_LOG_ERROR,
613 "Floor 0 bark map size is 0.\n");
614 return AVERROR_INVALIDDATA;
616 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
617 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
618 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
620 /* allocate mem for booklist */
621 floor_setup->data.t0.book_list =
622 av_malloc(floor_setup->data.t0.num_books);
623 if (!floor_setup->data.t0.book_list)
624 return AVERROR(ENOMEM);
625 /* read book indexes */
629 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
630 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
631 floor_setup->data.t0.book_list[idx] = book_idx;
632 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
633 max_codebook_dim = vc->codebooks[book_idx].dimensions;
637 if ((ret = create_map(vc, i)) < 0)
640 /* codebook dim is for padding if codebook dim doesn't *
641 * divide order+1 then we need to read more data */
642 floor_setup->data.t0.lsp =
643 av_malloc((floor_setup->data.t0.order + 1 + max_codebook_dim)
644 * sizeof(*floor_setup->data.t0.lsp));
645 if (!floor_setup->data.t0.lsp)
646 return AVERROR(ENOMEM);
648 /* debug output parsed headers */
649 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
650 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
651 av_dlog(NULL, "floor0 bark map size: %u\n",
652 floor_setup->data.t0.bark_map_size);
653 av_dlog(NULL, "floor0 amplitude bits: %u\n",
654 floor_setup->data.t0.amplitude_bits);
655 av_dlog(NULL, "floor0 amplitude offset: %u\n",
656 floor_setup->data.t0.amplitude_offset);
657 av_dlog(NULL, "floor0 number of books: %u\n",
658 floor_setup->data.t0.num_books);
659 av_dlog(NULL, "floor0 book list pointer: %p\n",
660 floor_setup->data.t0.book_list);
663 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
664 av_dlog(NULL, " Book %d: %u\n", idx + 1,
665 floor_setup->data.t0.book_list[idx]);
669 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
670 return AVERROR_INVALIDDATA;
676 // Process residues part
678 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
680 GetBitContext *gb = &vc->gb;
683 vc->residue_count = get_bits(gb, 6)+1;
684 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
686 return AVERROR(ENOMEM);
688 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
690 for (i = 0; i < vc->residue_count; ++i) {
691 vorbis_residue *res_setup = &vc->residues[i];
693 unsigned high_bits, low_bits;
695 res_setup->type = get_bits(gb, 16);
697 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
699 res_setup->begin = get_bits(gb, 24);
700 res_setup->end = get_bits(gb, 24);
701 res_setup->partition_size = get_bits(gb, 24) + 1;
702 /* Validations to prevent a buffer overflow later. */
703 if (res_setup->begin>res_setup->end ||
704 res_setup->end > (res_setup->type == 2 ? vc->audio_channels : 1) * vc->blocksize[1] / 2 ||
705 (res_setup->end-res_setup->begin) / res_setup->partition_size > V_MAX_PARTITIONS) {
706 av_log(vc->avctx, AV_LOG_ERROR,
707 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
708 res_setup->type, res_setup->begin, res_setup->end,
709 res_setup->partition_size, vc->blocksize[1] / 2);
710 return AVERROR_INVALIDDATA;
713 res_setup->classifications = get_bits(gb, 6) + 1;
714 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
716 res_setup->ptns_to_read =
717 (res_setup->end - res_setup->begin) / res_setup->partition_size;
718 res_setup->classifs = av_malloc(res_setup->ptns_to_read *
720 sizeof(*res_setup->classifs));
721 if (!res_setup->classifs)
722 return AVERROR(ENOMEM);
724 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
725 res_setup->begin, res_setup->end, res_setup->partition_size,
726 res_setup->classifications, res_setup->classbook);
728 for (j = 0; j < res_setup->classifications; ++j) {
730 low_bits = get_bits(gb, 3);
732 high_bits = get_bits(gb, 5);
733 cascade[j] = (high_bits << 3) + low_bits;
735 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
738 res_setup->maxpass = 0;
739 for (j = 0; j < res_setup->classifications; ++j) {
740 for (k = 0; k < 8; ++k) {
741 if (cascade[j]&(1 << k)) {
742 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
744 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
745 j, k, res_setup->books[j][k]);
747 if (k>res_setup->maxpass)
748 res_setup->maxpass = k;
750 res_setup->books[j][k] = -1;
758 // Process mappings part
760 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
762 GetBitContext *gb = &vc->gb;
765 vc->mapping_count = get_bits(gb, 6)+1;
766 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
768 return AVERROR(ENOMEM);
770 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
772 for (i = 0; i < vc->mapping_count; ++i) {
773 vorbis_mapping *mapping_setup = &vc->mappings[i];
775 if (get_bits(gb, 16)) {
776 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
777 return AVERROR_INVALIDDATA;
780 mapping_setup->submaps = get_bits(gb, 4) + 1;
782 mapping_setup->submaps = 1;
786 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
787 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
788 sizeof(*mapping_setup->magnitude));
789 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
790 sizeof(*mapping_setup->angle));
791 if (!mapping_setup->angle || !mapping_setup->magnitude)
792 return AVERROR(ENOMEM);
794 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
795 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
796 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
799 mapping_setup->coupling_steps = 0;
802 av_dlog(NULL, " %u mapping coupling steps: %d\n",
803 i, mapping_setup->coupling_steps);
805 if (get_bits(gb, 2)) {
806 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
807 return AVERROR_INVALIDDATA; // following spec.
810 if (mapping_setup->submaps>1) {
811 mapping_setup->mux = av_mallocz(vc->audio_channels *
812 sizeof(*mapping_setup->mux));
813 if (!mapping_setup->mux)
814 return AVERROR(ENOMEM);
816 for (j = 0; j < vc->audio_channels; ++j)
817 mapping_setup->mux[j] = get_bits(gb, 4);
820 for (j = 0; j < mapping_setup->submaps; ++j) {
821 skip_bits(gb, 8); // FIXME check?
822 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
823 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
825 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
826 mapping_setup->submap_floor[j],
827 mapping_setup->submap_residue[j]);
833 // Process modes part
835 static int create_map(vorbis_context *vc, unsigned floor_number)
837 vorbis_floor *floors = vc->floors;
843 for (blockflag = 0; blockflag < 2; ++blockflag) {
844 n = vc->blocksize[blockflag] / 2;
845 floors[floor_number].data.t0.map[blockflag] =
846 av_malloc((n + 1) * sizeof(int32_t)); // n + sentinel
847 if (!floors[floor_number].data.t0.map[blockflag])
848 return AVERROR(ENOMEM);
850 map = floors[floor_number].data.t0.map[blockflag];
851 vf = &floors[floor_number].data.t0;
853 for (idx = 0; idx < n; ++idx) {
854 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
855 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
856 if (vf->bark_map_size-1 < map[idx])
857 map[idx] = vf->bark_map_size - 1;
860 vf->map_size[blockflag] = n;
863 for (idx = 0; idx <= n; ++idx) {
864 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
870 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
872 GetBitContext *gb = &vc->gb;
875 vc->mode_count = get_bits(gb, 6) + 1;
876 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
878 return AVERROR(ENOMEM);
880 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
882 for (i = 0; i < vc->mode_count; ++i) {
883 vorbis_mode *mode_setup = &vc->modes[i];
885 mode_setup->blockflag = get_bits1(gb);
886 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
887 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
888 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
890 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
891 i, mode_setup->blockflag, mode_setup->windowtype,
892 mode_setup->transformtype, mode_setup->mapping);
897 // Process the whole setup header using the functions above
899 static int vorbis_parse_setup_hdr(vorbis_context *vc)
901 GetBitContext *gb = &vc->gb;
904 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
905 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
906 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
907 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
908 return AVERROR_INVALIDDATA;
911 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
912 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
915 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
916 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
919 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
920 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
923 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
924 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
927 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
928 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
931 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
932 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
935 if (!get_bits1(gb)) {
936 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
937 return AVERROR_INVALIDDATA; // framing flag bit unset error
943 // Process the identification header
945 static int vorbis_parse_id_hdr(vorbis_context *vc)
947 GetBitContext *gb = &vc->gb;
950 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
951 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
952 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
953 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
954 return AVERROR_INVALIDDATA;
957 vc->version = get_bits_long(gb, 32); //FIXME check 0
958 vc->audio_channels = get_bits(gb, 8);
959 if (vc->audio_channels <= 0) {
960 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
961 return AVERROR_INVALIDDATA;
963 vc->audio_samplerate = get_bits_long(gb, 32);
964 if (vc->audio_samplerate <= 0) {
965 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
966 return AVERROR_INVALIDDATA;
968 vc->bitrate_maximum = get_bits_long(gb, 32);
969 vc->bitrate_nominal = get_bits_long(gb, 32);
970 vc->bitrate_minimum = get_bits_long(gb, 32);
971 bl0 = get_bits(gb, 4);
972 bl1 = get_bits(gb, 4);
973 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
974 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
975 return AVERROR_INVALIDDATA;
977 vc->blocksize[0] = (1 << bl0);
978 vc->blocksize[1] = (1 << bl1);
979 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
980 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
982 if ((get_bits1(gb)) == 0) {
983 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
984 return AVERROR_INVALIDDATA;
987 vc->channel_residues = av_malloc((vc->blocksize[1] / 2) * vc->audio_channels * sizeof(*vc->channel_residues));
988 vc->saved = av_mallocz((vc->blocksize[1] / 4) * vc->audio_channels * sizeof(*vc->saved));
989 if (!vc->channel_residues || !vc->saved)
990 return AVERROR(ENOMEM);
992 vc->previous_window = 0;
994 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
995 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
997 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 ",
998 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1001 BLK = vc->blocksize[0];
1002 for (i = 0; i < BLK / 2; ++i) {
1003 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)));
1010 // Process the extradata using the functions above (identification header, setup header)
1012 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1014 vorbis_context *vc = avctx->priv_data;
1015 uint8_t *headers = avctx->extradata;
1016 int headers_len = avctx->extradata_size;
1017 uint8_t *header_start[3];
1019 GetBitContext *gb = &vc->gb;
1023 ff_vorbisdsp_init(&vc->dsp);
1024 avpriv_float_dsp_init(&vc->fdsp, avctx->flags & CODEC_FLAG_BITEXACT);
1025 ff_fmt_convert_init(&vc->fmt_conv, avctx);
1027 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1030 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1031 return AVERROR_INVALIDDATA;
1034 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1035 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1039 init_get_bits(gb, header_start[0], header_len[0]*8);
1040 hdr_type = get_bits(gb, 8);
1041 if (hdr_type != 1) {
1042 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1043 return AVERROR_INVALIDDATA;
1045 if ((ret = vorbis_parse_id_hdr(vc))) {
1046 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1051 init_get_bits(gb, header_start[2], header_len[2]*8);
1052 hdr_type = get_bits(gb, 8);
1053 if (hdr_type != 5) {
1054 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1056 return AVERROR_INVALIDDATA;
1058 if ((ret = vorbis_parse_setup_hdr(vc))) {
1059 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1064 if (vc->audio_channels > 8)
1065 avctx->channel_layout = 0;
1067 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1069 avctx->channels = vc->audio_channels;
1070 avctx->sample_rate = vc->audio_samplerate;
1075 // Decode audiopackets -------------------------------------------------
1077 // Read and decode floor
1079 static int vorbis_floor0_decode(vorbis_context *vc,
1080 vorbis_floor_data *vfu, float *vec)
1082 vorbis_floor0 *vf = &vfu->t0;
1083 float *lsp = vf->lsp;
1084 unsigned amplitude, book_idx;
1085 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1087 if (!vf->amplitude_bits)
1090 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1091 if (amplitude > 0) {
1093 unsigned idx, lsp_len = 0;
1094 vorbis_codebook codebook;
1096 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1097 if (book_idx >= vf->num_books) {
1098 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1101 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1102 codebook = vc->codebooks[vf->book_list[book_idx]];
1103 /* Invalid codebook! */
1104 if (!codebook.codevectors)
1105 return AVERROR_INVALIDDATA;
1107 while (lsp_len<vf->order) {
1110 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1111 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1112 /* read temp vector */
1113 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1114 codebook.nb_bits, codebook.maxdepth)
1115 * codebook.dimensions;
1116 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1117 /* copy each vector component and add last to it */
1118 for (idx = 0; idx < codebook.dimensions; ++idx)
1119 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1120 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1122 lsp_len += codebook.dimensions;
1124 /* DEBUG: output lsp coeffs */
1127 for (idx = 0; idx < lsp_len; ++idx)
1128 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1131 /* synthesize floor output vector */
1134 int order = vf->order;
1135 float wstep = M_PI / vf->bark_map_size;
1137 for (i = 0; i < order; i++)
1138 lsp[i] = 2.0f * cos(lsp[i]);
1140 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1141 vf->map_size[blockflag], order, wstep);
1144 while (i < vf->map_size[blockflag]) {
1145 int j, iter_cond = vf->map[blockflag][i];
1148 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1150 /* similar part for the q and p products */
1151 for (j = 0; j + 1 < order; j += 2) {
1152 q *= lsp[j] - two_cos_w;
1153 p *= lsp[j + 1] - two_cos_w;
1155 if (j == order) { // even order
1156 p *= p * (2.0f - two_cos_w);
1157 q *= q * (2.0f + two_cos_w);
1158 } else { // odd order
1159 q *= two_cos_w-lsp[j]; // one more time for q
1161 /* final step and square */
1162 p *= p * (4.f - two_cos_w * two_cos_w);
1166 /* calculate linear floor value */
1167 q = exp((((amplitude*vf->amplitude_offset) /
1168 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1169 - vf->amplitude_offset) * .11512925f);
1174 } while (vf->map[blockflag][i] == iter_cond);
1178 /* this channel is unused */
1182 av_dlog(NULL, " Floor0 decoded\n");
1187 static int vorbis_floor1_decode(vorbis_context *vc,
1188 vorbis_floor_data *vfu, float *vec)
1190 vorbis_floor1 *vf = &vfu->t1;
1191 GetBitContext *gb = &vc->gb;
1192 uint16_t range_v[4] = { 256, 128, 86, 64 };
1193 unsigned range = range_v[vf->multiplier - 1];
1194 uint16_t floor1_Y[258];
1195 uint16_t floor1_Y_final[258];
1196 int floor1_flag[258];
1197 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1198 int book, adx, ady, dy, off, predicted, err;
1201 if (!get_bits1(gb)) // silence
1204 // Read values (or differences) for the floor's points
1206 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1207 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1209 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1212 for (i = 0; i < vf->partitions; ++i) {
1213 partition_class = vf->partition_class[i];
1214 cdim = vf->class_dimensions[partition_class];
1215 cbits = vf->class_subclasses[partition_class];
1216 csub = (1 << cbits) - 1;
1219 av_dlog(NULL, "Cbits %u\n", cbits);
1221 if (cbits) // this reads all subclasses for this partition's class
1222 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1223 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1225 for (j = 0; j < cdim; ++j) {
1226 book = vf->subclass_books[partition_class][cval & csub];
1228 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1229 book, cbits, cval, get_bits_count(gb));
1231 cval = cval >> cbits;
1233 floor1_Y[offset+j] = get_vlc2(gb, vc->codebooks[book].vlc.table,
1234 vc->codebooks[book].nb_bits, 3);
1236 floor1_Y[offset+j] = 0;
1239 av_dlog(NULL, " floor(%d) = %d \n",
1240 vf->list[offset+j].x, floor1_Y[offset+j]);
1245 // Amplitude calculation from the differences
1249 floor1_Y_final[0] = floor1_Y[0];
1250 floor1_Y_final[1] = floor1_Y[1];
1252 for (i = 2; i < vf->x_list_dim; ++i) {
1253 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1255 low_neigh_offs = vf->list[i].low;
1256 high_neigh_offs = vf->list[i].high;
1257 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1258 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1260 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1263 predicted = floor1_Y_final[low_neigh_offs] - off;
1265 predicted = floor1_Y_final[low_neigh_offs] + off;
1266 } // render_point end
1269 highroom = range-predicted;
1270 lowroom = predicted;
1271 if (highroom < lowroom) {
1272 room = highroom * 2;
1274 room = lowroom * 2; // SPEC misspelling
1277 floor1_flag[low_neigh_offs] = 1;
1278 floor1_flag[high_neigh_offs] = 1;
1281 if (highroom > lowroom) {
1282 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1284 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1288 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1290 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1295 floor1_Y_final[i] = av_clip_uint16(predicted);
1298 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1299 vf->list[i].x, floor1_Y_final[i], val);
1302 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1304 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1306 av_dlog(NULL, " Floor decoded\n");
1311 // Read and decode residue
1313 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1316 uint8_t *do_not_decode,
1322 GetBitContext *gb = &vc->gb;
1323 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1324 unsigned ptns_to_read = vr->ptns_to_read;
1325 uint8_t *classifs = vr->classifs;
1326 unsigned pass, ch_used, i, j, k, l;
1327 unsigned max_output = (ch - 1) * vlen;
1330 for (j = 1; j < ch; ++j)
1331 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1332 if (do_not_decode[0])
1335 max_output += vr->end / ch;
1338 max_output += vr->end;
1341 if (max_output > ch_left * vlen) {
1342 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1346 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1348 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1349 uint16_t voffset, partition_count, j_times_ptns_to_read;
1351 voffset = vr->begin;
1352 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1354 unsigned inverse_class = ff_inverse[vr->classifications];
1355 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1356 if (!do_not_decode[j]) {
1357 unsigned temp = get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1358 vc->codebooks[vr->classbook].nb_bits, 3);
1360 av_dlog(NULL, "Classword: %u\n", temp);
1362 av_assert0(vr->classifications > 1 && temp <= 65536); //needed for inverse[]
1363 for (i = 0; i < c_p_c; ++i) {
1366 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1367 if (partition_count + c_p_c - 1 - i < ptns_to_read)
1368 classifs[j_times_ptns_to_read + partition_count + c_p_c - 1 - i] = temp - temp2 * vr->classifications;
1372 j_times_ptns_to_read += ptns_to_read;
1375 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1376 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1379 if (!do_not_decode[j]) {
1380 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1381 int vqbook = vr->books[vqclass][pass];
1383 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1385 unsigned dim = vc->codebooks[vqbook].dimensions;
1386 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1387 vorbis_codebook codebook = vc->codebooks[vqbook];
1391 voffs = voffset+j*vlen;
1392 for (k = 0; k < step; ++k) {
1393 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1394 for (l = 0; l < dim; ++l)
1395 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1397 } else if (vr_type == 1) {
1398 voffs = voffset + j * vlen;
1399 for (k = 0; k < step; ++k) {
1400 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1401 for (l = 0; l < dim; ++l, ++voffs) {
1402 vec[voffs]+=codebook.codevectors[coffs+l];
1404 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1405 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1408 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1409 voffs = voffset >> 1;
1412 for (k = 0; k < step; ++k) {
1413 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1414 vec[voffs + k ] += codebook.codevectors[coffs ];
1415 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1417 } else if (dim == 4) {
1418 for (k = 0; k < step; ++k, voffs += 2) {
1419 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1420 vec[voffs ] += codebook.codevectors[coffs ];
1421 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1422 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1423 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1426 for (k = 0; k < step; ++k) {
1427 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1428 for (l = 0; l < dim; l += 2, voffs++) {
1429 vec[voffs ] += codebook.codevectors[coffs + l ];
1430 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1432 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1433 pass, voffset / ch + (voffs % ch) * vlen,
1434 vec[voffset / ch + (voffs % ch) * vlen],
1435 codebook.codevectors[coffs + l], coffs, l);
1439 } else if (vr_type == 2) {
1440 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1441 unsigned voffs_mod = voffset - voffs_div * ch;
1443 for (k = 0; k < step; ++k) {
1444 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1445 for (l = 0; l < dim; ++l) {
1446 vec[voffs_div + voffs_mod * vlen] +=
1447 codebook.codevectors[coffs + l];
1449 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1450 pass, voffs_div + voffs_mod * vlen,
1451 vec[voffs_div + voffs_mod * vlen],
1452 codebook.codevectors[coffs + l], coffs, l);
1454 if (++voffs_mod == ch) {
1463 j_times_ptns_to_read += ptns_to_read;
1466 voffset += vr->partition_size;
1473 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1475 uint8_t *do_not_decode,
1476 float *vec, unsigned vlen,
1480 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1481 else if (vr->type == 1)
1482 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1483 else if (vr->type == 0)
1484 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1486 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1487 return AVERROR_INVALIDDATA;
1491 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1494 for (i = 0; i < blocksize; i++) {
1497 ang[i] = mag[i] - ang[i];
1499 float temp = ang[i];
1507 float temp = ang[i];
1515 // Decode the audio packet using the functions above
1517 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1519 GetBitContext *gb = &vc->gb;
1521 unsigned previous_window = vc->previous_window;
1522 unsigned mode_number, blockflag, blocksize;
1524 uint8_t no_residue[255];
1525 uint8_t do_not_decode[255];
1526 vorbis_mapping *mapping;
1527 float *ch_res_ptr = vc->channel_residues;
1528 uint8_t res_chan[255];
1529 unsigned res_num = 0;
1531 unsigned ch_left = vc->audio_channels;
1534 if (get_bits1(gb)) {
1535 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1536 return AVERROR_INVALIDDATA; // packet type not audio
1539 if (vc->mode_count == 1) {
1542 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1544 vc->mode_number = mode_number;
1545 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1547 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1548 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1550 blockflag = vc->modes[mode_number].blockflag;
1551 blocksize = vc->blocksize[blockflag];
1552 vlen = blocksize / 2;
1554 previous_window = get_bits(gb, 1);
1555 skip_bits1(gb); // next_window
1558 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1559 for (i = 0; i < vc->audio_channels; ++i)
1560 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1564 for (i = 0; i < vc->audio_channels; ++i) {
1565 vorbis_floor *floor;
1567 if (mapping->submaps > 1) {
1568 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1570 floor = &vc->floors[mapping->submap_floor[0]];
1573 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1576 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1577 return AVERROR_INVALIDDATA;
1579 no_residue[i] = ret;
1582 // Nonzero vector propagate
1584 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1585 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1586 no_residue[mapping->magnitude[i]] = 0;
1587 no_residue[mapping->angle[i]] = 0;
1593 for (i = 0; i < mapping->submaps; ++i) {
1594 vorbis_residue *residue;
1598 for (j = 0; j < vc->audio_channels; ++j) {
1599 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1600 res_chan[j] = res_num;
1601 if (no_residue[j]) {
1602 do_not_decode[ch] = 1;
1604 do_not_decode[ch] = 0;
1610 residue = &vc->residues[mapping->submap_residue[i]];
1612 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1616 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1621 ch_res_ptr += ch * vlen;
1626 return AVERROR_INVALIDDATA;
1630 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1633 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1634 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1635 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1640 mdct = &vc->mdct[blockflag];
1642 for (j = vc->audio_channels-1;j >= 0; j--) {
1643 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1644 vc->fdsp.vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1645 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1648 // Overlap/add, save data for next overlapping
1650 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1651 for (j = 0; j < vc->audio_channels; j++) {
1652 unsigned bs0 = vc->blocksize[0];
1653 unsigned bs1 = vc->blocksize[1];
1654 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1655 float *saved = vc->saved + j * bs1 / 4;
1656 float *ret = floor_ptr[j];
1657 float *buf = residue;
1658 const float *win = vc->win[blockflag & previous_window];
1660 if (blockflag == previous_window) {
1661 vc->fdsp.vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1662 } else if (blockflag > previous_window) {
1663 vc->fdsp.vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1664 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1666 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1667 vc->fdsp.vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1669 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1672 vc->previous_window = blockflag;
1676 // Return the decoded audio packet through the standard api
1678 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1679 int *got_frame_ptr, AVPacket *avpkt)
1681 const uint8_t *buf = avpkt->data;
1682 int buf_size = avpkt->size;
1683 vorbis_context *vc = avctx->priv_data;
1684 AVFrame *frame = data;
1685 GetBitContext *gb = &vc->gb;
1686 float *channel_ptrs[255];
1689 av_dlog(NULL, "packet length %d \n", buf_size);
1691 if (*buf == 1 && buf_size > 7) {
1692 init_get_bits(gb, buf+1, buf_size*8 - 8);
1694 if ((ret = vorbis_parse_id_hdr(vc))) {
1695 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1700 if (vc->audio_channels > 8)
1701 avctx->channel_layout = 0;
1703 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1705 avctx->channels = vc->audio_channels;
1706 avctx->sample_rate = vc->audio_samplerate;
1710 if (*buf == 3 && buf_size > 7) {
1711 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1715 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1716 init_get_bits(gb, buf+1, buf_size*8 - 8);
1717 if ((ret = vorbis_parse_setup_hdr(vc))) {
1718 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1725 if (!vc->channel_residues || !vc->modes) {
1726 av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1727 return AVERROR_INVALIDDATA;
1730 /* get output buffer */
1731 frame->nb_samples = vc->blocksize[1] / 2;
1732 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1735 if (vc->audio_channels > 8) {
1736 for (i = 0; i < vc->audio_channels; i++)
1737 channel_ptrs[i] = (float *)frame->extended_data[i];
1739 for (i = 0; i < vc->audio_channels; i++) {
1740 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1741 channel_ptrs[ch] = (float *)frame->extended_data[i];
1745 init_get_bits(gb, buf, buf_size*8);
1747 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1750 if (!vc->first_frame) {
1751 vc->first_frame = 1;
1753 av_frame_unref(frame);
1757 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1758 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1760 frame->nb_samples = len;
1768 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1770 vorbis_context *vc = avctx->priv_data;
1777 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1779 vorbis_context *vc = avctx->priv_data;
1782 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1783 sizeof(*vc->saved));
1785 vc->previous_window = 0;
1788 AVCodec ff_vorbis_decoder = {
1790 .type = AVMEDIA_TYPE_AUDIO,
1791 .id = AV_CODEC_ID_VORBIS,
1792 .priv_data_size = sizeof(vorbis_context),
1793 .init = vorbis_decode_init,
1794 .close = vorbis_decode_close,
1795 .decode = vorbis_decode_frame,
1796 .flush = vorbis_decode_flush,
1797 .capabilities = CODEC_CAP_DR1,
1798 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1799 .channel_layouts = ff_vorbis_channel_layouts,
1800 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1801 AV_SAMPLE_FMT_NONE },