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)
50 typedef struct vorbis_codebook {
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 *);
66 typedef struct vorbis_floor {
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;
96 typedef struct vorbis_residue {
100 unsigned partition_size;
101 uint8_t classifications;
103 int16_t books[64][8];
105 uint16_t ptns_to_read;
109 typedef struct vorbis_mapping {
111 uint16_t coupling_steps;
115 uint8_t submap_floor[16];
116 uint8_t submap_residue[16];
119 typedef struct vorbis_mode {
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 int8_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);
199 for (i = 0; i < vc->residue_count; i++)
200 av_freep(&vc->residues[i].classifs);
201 av_freep(&vc->residues);
202 av_freep(&vc->modes);
204 ff_mdct_end(&vc->mdct[0]);
205 ff_mdct_end(&vc->mdct[1]);
208 for (i = 0; i < vc->codebook_count; ++i) {
209 av_freep(&vc->codebooks[i].codevectors);
210 ff_free_vlc(&vc->codebooks[i].vlc);
212 av_freep(&vc->codebooks);
215 for (i = 0; i < vc->floor_count; ++i) {
216 if (vc->floors[i].floor_type == 0) {
217 av_freep(&vc->floors[i].data.t0.map[0]);
218 av_freep(&vc->floors[i].data.t0.map[1]);
219 av_freep(&vc->floors[i].data.t0.book_list);
220 av_freep(&vc->floors[i].data.t0.lsp);
222 av_freep(&vc->floors[i].data.t1.list);
225 av_freep(&vc->floors);
228 for (i = 0; i < vc->mapping_count; ++i) {
229 av_freep(&vc->mappings[i].magnitude);
230 av_freep(&vc->mappings[i].angle);
231 av_freep(&vc->mappings[i].mux);
233 av_freep(&vc->mappings);
236 // Parse setup header -------------------------------------------------
238 // Process codebooks part
240 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
243 uint8_t *tmp_vlc_bits = NULL;
244 uint32_t *tmp_vlc_codes = NULL;
245 GetBitContext *gb = &vc->gb;
246 uint16_t *codebook_multiplicands = NULL;
249 vc->codebook_count = get_bits(gb, 8) + 1;
251 av_dlog(NULL, " Codebooks: %d \n", vc->codebook_count);
253 vc->codebooks = av_mallocz(vc->codebook_count * sizeof(*vc->codebooks));
254 tmp_vlc_bits = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_bits));
255 tmp_vlc_codes = av_mallocz(V_MAX_VLCS * sizeof(*tmp_vlc_codes));
256 codebook_multiplicands = av_malloc(V_MAX_VLCS * sizeof(*codebook_multiplicands));
257 if (!vc->codebooks ||
258 !tmp_vlc_bits || !tmp_vlc_codes || !codebook_multiplicands) {
259 ret = AVERROR(ENOMEM);
263 for (cb = 0; cb < vc->codebook_count; ++cb) {
264 vorbis_codebook *codebook_setup = &vc->codebooks[cb];
265 unsigned ordered, t, entries, used_entries = 0;
267 av_dlog(NULL, " %u. Codebook\n", cb);
269 if (get_bits(gb, 24) != 0x564342) {
270 av_log(vc->avctx, AV_LOG_ERROR,
271 " %u. Codebook setup data corrupt.\n", cb);
272 ret = AVERROR_INVALIDDATA;
276 codebook_setup->dimensions=get_bits(gb, 16);
277 if (codebook_setup->dimensions > 16 || codebook_setup->dimensions == 0) {
278 av_log(vc->avctx, AV_LOG_ERROR,
279 " %u. Codebook's dimension is invalid (%d).\n",
280 cb, codebook_setup->dimensions);
281 ret = AVERROR_INVALIDDATA;
284 entries = get_bits(gb, 24);
285 if (entries > V_MAX_VLCS) {
286 av_log(vc->avctx, AV_LOG_ERROR,
287 " %u. Codebook has too many entries (%u).\n",
289 ret = AVERROR_INVALIDDATA;
293 ordered = get_bits1(gb);
295 av_dlog(NULL, " codebook_dimensions %d, codebook_entries %u\n",
296 codebook_setup->dimensions, entries);
300 unsigned sparse = get_bits1(gb);
302 av_dlog(NULL, " not ordered \n");
305 av_dlog(NULL, " sparse \n");
308 for (ce = 0; ce < entries; ++ce) {
309 flag = get_bits1(gb);
311 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
314 tmp_vlc_bits[ce] = 0;
317 av_dlog(NULL, " not sparse \n");
319 used_entries = entries;
320 for (ce = 0; ce < entries; ++ce)
321 tmp_vlc_bits[ce] = get_bits(gb, 5) + 1;
324 unsigned current_entry = 0;
325 unsigned current_length = get_bits(gb, 5) + 1;
327 av_dlog(NULL, " ordered, current length: %u\n", current_length); //FIXME
329 used_entries = entries;
330 for (; current_entry < used_entries && current_length <= 32; ++current_length) {
333 av_dlog(NULL, " number bits: %u ", ilog(entries - current_entry));
335 number = get_bits(gb, ilog(entries - current_entry));
337 av_dlog(NULL, " number: %u\n", number);
339 for (i = current_entry; i < number+current_entry; ++i)
340 if (i < used_entries)
341 tmp_vlc_bits[i] = current_length;
343 current_entry+=number;
345 if (current_entry>used_entries) {
346 av_log(vc->avctx, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
347 ret = AVERROR_INVALIDDATA;
352 codebook_setup->lookup_type = get_bits(gb, 4);
354 av_dlog(NULL, " lookup type: %d : %s \n", codebook_setup->lookup_type,
355 codebook_setup->lookup_type ? "vq" : "no lookup");
357 // If the codebook is used for (inverse) VQ, calculate codevectors.
359 if (codebook_setup->lookup_type == 1) {
361 unsigned codebook_lookup_values = ff_vorbis_nth_root(entries, codebook_setup->dimensions);
363 float codebook_minimum_value = vorbisfloat2float(get_bits_long(gb, 32));
364 float codebook_delta_value = vorbisfloat2float(get_bits_long(gb, 32));
365 unsigned codebook_value_bits = get_bits(gb, 4) + 1;
366 unsigned codebook_sequence_p = get_bits1(gb);
368 av_dlog(NULL, " We expect %d numbers for building the codevectors. \n",
369 codebook_lookup_values);
370 av_dlog(NULL, " delta %f minmum %f \n",
371 codebook_delta_value, codebook_minimum_value);
373 for (i = 0; i < codebook_lookup_values; ++i) {
374 codebook_multiplicands[i] = get_bits(gb, codebook_value_bits);
376 av_dlog(NULL, " multiplicands*delta+minmum : %e \n",
377 (float)codebook_multiplicands[i] * codebook_delta_value + codebook_minimum_value);
378 av_dlog(NULL, " multiplicand %u\n", codebook_multiplicands[i]);
381 // Weed out unused vlcs and build codevector vector
383 codebook_setup->codevectors =
384 av_mallocz_array(used_entries, codebook_setup->dimensions *
385 sizeof(*codebook_setup->codevectors));
386 if (!codebook_setup->codevectors)
387 return AVERROR(ENOMEM);
389 codebook_setup->codevectors = NULL;
391 for (j = 0, i = 0; i < entries; ++i) {
392 unsigned dim = codebook_setup->dimensions;
394 if (tmp_vlc_bits[i]) {
396 unsigned lookup_offset = i;
398 av_dlog(vc->avctx, "Lookup offset %u ,", i);
400 for (k = 0; k < dim; ++k) {
401 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
402 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
403 if (codebook_sequence_p)
404 last = codebook_setup->codevectors[j * dim + k];
405 lookup_offset/=codebook_lookup_values;
407 tmp_vlc_bits[j] = tmp_vlc_bits[i];
409 av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
410 for (k = 0; k < dim; ++k)
411 av_dlog(vc->avctx, " %f ",
412 codebook_setup->codevectors[j * dim + k]);
413 av_dlog(vc->avctx, "\n");
418 if (j != used_entries) {
419 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
420 ret = AVERROR_INVALIDDATA;
423 entries = used_entries;
424 } else if (codebook_setup->lookup_type >= 2) {
425 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
426 ret = AVERROR_INVALIDDATA;
430 // Initialize VLC table
431 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
432 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
433 ret = AVERROR_INVALIDDATA;
436 codebook_setup->maxdepth = 0;
437 for (t = 0; t < entries; ++t)
438 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
439 codebook_setup->maxdepth = tmp_vlc_bits[t];
441 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
442 codebook_setup->nb_bits = V_NB_BITS2;
444 codebook_setup->nb_bits = V_NB_BITS;
446 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
448 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
449 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
450 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
451 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
453 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
458 av_free(tmp_vlc_bits);
459 av_free(tmp_vlc_codes);
460 av_free(codebook_multiplicands);
465 av_free(tmp_vlc_bits);
466 av_free(tmp_vlc_codes);
467 av_free(codebook_multiplicands);
471 // Process time domain transforms part (unused in Vorbis I)
473 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
475 GetBitContext *gb = &vc->gb;
476 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
478 for (i = 0; i < vorbis_time_count; ++i) {
479 unsigned vorbis_tdtransform = get_bits(gb, 16);
481 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
482 vorbis_time_count, vorbis_tdtransform);
484 if (vorbis_tdtransform) {
485 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
486 return AVERROR_INVALIDDATA;
492 // Process floors part
494 static int vorbis_floor0_decode(vorbis_context *vc,
495 vorbis_floor_data *vfu, float *vec);
496 static int create_map(vorbis_context *vc, unsigned floor_number);
497 static int vorbis_floor1_decode(vorbis_context *vc,
498 vorbis_floor_data *vfu, float *vec);
499 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
501 GetBitContext *gb = &vc->gb;
504 vc->floor_count = get_bits(gb, 6) + 1;
506 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
508 return AVERROR(ENOMEM);
510 for (i = 0; i < vc->floor_count; ++i) {
511 vorbis_floor *floor_setup = &vc->floors[i];
513 floor_setup->floor_type = get_bits(gb, 16);
515 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
517 if (floor_setup->floor_type == 1) {
518 int maximum_class = -1;
519 unsigned rangebits, rangemax, floor1_values = 2;
521 floor_setup->decode = vorbis_floor1_decode;
523 floor_setup->data.t1.partitions = get_bits(gb, 5);
525 av_dlog(NULL, " %d.floor: %d partitions \n",
526 i, floor_setup->data.t1.partitions);
528 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
529 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
530 if (floor_setup->data.t1.partition_class[j] > maximum_class)
531 maximum_class = floor_setup->data.t1.partition_class[j];
533 av_dlog(NULL, " %d. floor %d partition class %d \n",
534 i, j, floor_setup->data.t1.partition_class[j]);
538 av_dlog(NULL, " maximum class %d \n", maximum_class);
540 for (j = 0; j <= maximum_class; ++j) {
541 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
542 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
544 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
545 floor_setup->data.t1.class_dimensions[j],
546 floor_setup->data.t1.class_subclasses[j]);
548 if (floor_setup->data.t1.class_subclasses[j]) {
549 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
551 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
554 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
555 int16_t bits = get_bits(gb, 8) - 1;
557 VALIDATE_INDEX(bits, vc->codebook_count)
558 floor_setup->data.t1.subclass_books[j][k] = bits;
560 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
564 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
565 floor_setup->data.t1.x_list_dim = 2;
567 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
568 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
570 floor_setup->data.t1.list = av_mallocz_array(floor_setup->data.t1.x_list_dim,
571 sizeof(*floor_setup->data.t1.list));
572 if (!floor_setup->data.t1.list)
573 return AVERROR(ENOMEM);
575 rangebits = get_bits(gb, 4);
576 rangemax = (1 << rangebits);
577 if (rangemax > vc->blocksize[1] / 2) {
578 av_log(vc->avctx, AV_LOG_ERROR,
579 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
580 rangemax, vc->blocksize[1] / 2);
581 return AVERROR_INVALIDDATA;
583 floor_setup->data.t1.list[0].x = 0;
584 floor_setup->data.t1.list[1].x = rangemax;
586 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
587 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
588 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
590 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
591 floor_setup->data.t1.list[floor1_values].x);
595 // Precalculate order of x coordinates - needed for decode
596 if (ff_vorbis_ready_floor1_list(vc->avctx,
597 floor_setup->data.t1.list,
598 floor_setup->data.t1.x_list_dim)) {
599 return AVERROR_INVALIDDATA;
601 } else if (floor_setup->floor_type == 0) {
602 unsigned max_codebook_dim = 0;
604 floor_setup->decode = vorbis_floor0_decode;
606 floor_setup->data.t0.order = get_bits(gb, 8);
607 if (!floor_setup->data.t0.order) {
608 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
609 return AVERROR_INVALIDDATA;
611 floor_setup->data.t0.rate = get_bits(gb, 16);
612 if (!floor_setup->data.t0.rate) {
613 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
614 return AVERROR_INVALIDDATA;
616 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
617 if (!floor_setup->data.t0.bark_map_size) {
618 av_log(vc->avctx, AV_LOG_ERROR,
619 "Floor 0 bark map size is 0.\n");
620 return AVERROR_INVALIDDATA;
622 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
623 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
624 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
626 /* allocate mem for booklist */
627 floor_setup->data.t0.book_list =
628 av_malloc(floor_setup->data.t0.num_books);
629 if (!floor_setup->data.t0.book_list)
630 return AVERROR(ENOMEM);
631 /* read book indexes */
635 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
636 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
637 floor_setup->data.t0.book_list[idx] = book_idx;
638 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
639 max_codebook_dim = vc->codebooks[book_idx].dimensions;
643 if ((ret = create_map(vc, i)) < 0)
646 /* codebook dim is for padding if codebook dim doesn't *
647 * divide order+1 then we need to read more data */
648 floor_setup->data.t0.lsp =
649 av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
650 sizeof(*floor_setup->data.t0.lsp));
651 if (!floor_setup->data.t0.lsp)
652 return AVERROR(ENOMEM);
654 /* debug output parsed headers */
655 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
656 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
657 av_dlog(NULL, "floor0 bark map size: %u\n",
658 floor_setup->data.t0.bark_map_size);
659 av_dlog(NULL, "floor0 amplitude bits: %u\n",
660 floor_setup->data.t0.amplitude_bits);
661 av_dlog(NULL, "floor0 amplitude offset: %u\n",
662 floor_setup->data.t0.amplitude_offset);
663 av_dlog(NULL, "floor0 number of books: %u\n",
664 floor_setup->data.t0.num_books);
665 av_dlog(NULL, "floor0 book list pointer: %p\n",
666 floor_setup->data.t0.book_list);
669 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
670 av_dlog(NULL, " Book %d: %u\n", idx + 1,
671 floor_setup->data.t0.book_list[idx]);
675 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
676 return AVERROR_INVALIDDATA;
682 // Process residues part
684 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
686 GetBitContext *gb = &vc->gb;
689 vc->residue_count = get_bits(gb, 6)+1;
690 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
692 return AVERROR(ENOMEM);
694 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
696 for (i = 0; i < vc->residue_count; ++i) {
697 vorbis_residue *res_setup = &vc->residues[i];
699 unsigned high_bits, low_bits;
701 res_setup->type = get_bits(gb, 16);
703 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
705 res_setup->begin = get_bits(gb, 24);
706 res_setup->end = get_bits(gb, 24);
707 res_setup->partition_size = get_bits(gb, 24) + 1;
708 /* Validations to prevent a buffer overflow later. */
709 if (res_setup->begin>res_setup->end ||
710 (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
711 av_log(vc->avctx, AV_LOG_ERROR,
712 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
713 res_setup->type, res_setup->begin, res_setup->end,
714 res_setup->partition_size, vc->blocksize[1] / 2);
715 return AVERROR_INVALIDDATA;
718 res_setup->classifications = get_bits(gb, 6) + 1;
719 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
721 res_setup->ptns_to_read =
722 (res_setup->end - res_setup->begin) / res_setup->partition_size;
723 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
725 sizeof(*res_setup->classifs));
726 if (!res_setup->classifs)
727 return AVERROR(ENOMEM);
729 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
730 res_setup->begin, res_setup->end, res_setup->partition_size,
731 res_setup->classifications, res_setup->classbook);
733 for (j = 0; j < res_setup->classifications; ++j) {
735 low_bits = get_bits(gb, 3);
737 high_bits = get_bits(gb, 5);
738 cascade[j] = (high_bits << 3) + low_bits;
740 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
743 res_setup->maxpass = 0;
744 for (j = 0; j < res_setup->classifications; ++j) {
745 for (k = 0; k < 8; ++k) {
746 if (cascade[j]&(1 << k)) {
747 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
749 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
750 j, k, res_setup->books[j][k]);
752 if (k>res_setup->maxpass)
753 res_setup->maxpass = k;
755 res_setup->books[j][k] = -1;
763 // Process mappings part
765 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
767 GetBitContext *gb = &vc->gb;
770 vc->mapping_count = get_bits(gb, 6)+1;
771 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
773 return AVERROR(ENOMEM);
775 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
777 for (i = 0; i < vc->mapping_count; ++i) {
778 vorbis_mapping *mapping_setup = &vc->mappings[i];
780 if (get_bits(gb, 16)) {
781 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
782 return AVERROR_INVALIDDATA;
785 mapping_setup->submaps = get_bits(gb, 4) + 1;
787 mapping_setup->submaps = 1;
791 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
792 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
793 sizeof(*mapping_setup->magnitude));
794 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
795 sizeof(*mapping_setup->angle));
796 if (!mapping_setup->angle || !mapping_setup->magnitude)
797 return AVERROR(ENOMEM);
799 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
800 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
801 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
804 mapping_setup->coupling_steps = 0;
807 av_dlog(NULL, " %u mapping coupling steps: %d\n",
808 i, mapping_setup->coupling_steps);
810 if (get_bits(gb, 2)) {
811 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
812 return AVERROR_INVALIDDATA; // following spec.
815 if (mapping_setup->submaps>1) {
816 mapping_setup->mux = av_mallocz_array(vc->audio_channels,
817 sizeof(*mapping_setup->mux));
818 if (!mapping_setup->mux)
819 return AVERROR(ENOMEM);
821 for (j = 0; j < vc->audio_channels; ++j)
822 mapping_setup->mux[j] = get_bits(gb, 4);
825 for (j = 0; j < mapping_setup->submaps; ++j) {
826 skip_bits(gb, 8); // FIXME check?
827 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
828 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
830 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
831 mapping_setup->submap_floor[j],
832 mapping_setup->submap_residue[j]);
838 // Process modes part
840 static int create_map(vorbis_context *vc, unsigned floor_number)
842 vorbis_floor *floors = vc->floors;
848 for (blockflag = 0; blockflag < 2; ++blockflag) {
849 n = vc->blocksize[blockflag] / 2;
850 floors[floor_number].data.t0.map[blockflag] =
851 av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
852 if (!floors[floor_number].data.t0.map[blockflag])
853 return AVERROR(ENOMEM);
855 map = floors[floor_number].data.t0.map[blockflag];
856 vf = &floors[floor_number].data.t0;
858 for (idx = 0; idx < n; ++idx) {
859 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
860 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
861 if (vf->bark_map_size-1 < map[idx])
862 map[idx] = vf->bark_map_size - 1;
865 vf->map_size[blockflag] = n;
868 for (idx = 0; idx <= n; ++idx) {
869 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
875 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
877 GetBitContext *gb = &vc->gb;
880 vc->mode_count = get_bits(gb, 6) + 1;
881 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
883 return AVERROR(ENOMEM);
885 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
887 for (i = 0; i < vc->mode_count; ++i) {
888 vorbis_mode *mode_setup = &vc->modes[i];
890 mode_setup->blockflag = get_bits1(gb);
891 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
892 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
893 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
895 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
896 i, mode_setup->blockflag, mode_setup->windowtype,
897 mode_setup->transformtype, mode_setup->mapping);
902 // Process the whole setup header using the functions above
904 static int vorbis_parse_setup_hdr(vorbis_context *vc)
906 GetBitContext *gb = &vc->gb;
909 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
910 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
911 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
912 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
913 return AVERROR_INVALIDDATA;
916 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
917 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
920 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
921 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
924 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
925 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
928 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
929 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
932 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
933 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
936 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
937 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
940 if (!get_bits1(gb)) {
941 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
942 return AVERROR_INVALIDDATA; // framing flag bit unset error
948 // Process the identification header
950 static int vorbis_parse_id_hdr(vorbis_context *vc)
952 GetBitContext *gb = &vc->gb;
955 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
956 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
957 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
958 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
959 return AVERROR_INVALIDDATA;
962 vc->version = get_bits_long(gb, 32); //FIXME check 0
963 vc->audio_channels = get_bits(gb, 8);
964 if (vc->audio_channels <= 0) {
965 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
966 return AVERROR_INVALIDDATA;
968 vc->audio_samplerate = get_bits_long(gb, 32);
969 if (vc->audio_samplerate <= 0) {
970 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
971 return AVERROR_INVALIDDATA;
973 vc->bitrate_maximum = get_bits_long(gb, 32);
974 vc->bitrate_nominal = get_bits_long(gb, 32);
975 vc->bitrate_minimum = get_bits_long(gb, 32);
976 bl0 = get_bits(gb, 4);
977 bl1 = get_bits(gb, 4);
978 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
979 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
980 return AVERROR_INVALIDDATA;
982 vc->blocksize[0] = (1 << bl0);
983 vc->blocksize[1] = (1 << bl1);
984 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
985 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
987 if ((get_bits1(gb)) == 0) {
988 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
989 return AVERROR_INVALIDDATA;
992 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
993 vc->saved = av_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
994 if (!vc->channel_residues || !vc->saved)
995 return AVERROR(ENOMEM);
997 vc->previous_window = -1;
999 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
1000 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
1001 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & CODEC_FLAG_BITEXACT);
1003 return AVERROR(ENOMEM);
1005 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 ",
1006 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1009 BLK = vc->blocksize[0];
1010 for (i = 0; i < BLK / 2; ++i) {
1011 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)));
1018 // Process the extradata using the functions above (identification header, setup header)
1020 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1022 vorbis_context *vc = avctx->priv_data;
1023 uint8_t *headers = avctx->extradata;
1024 int headers_len = avctx->extradata_size;
1025 const uint8_t *header_start[3];
1027 GetBitContext *gb = &vc->gb;
1031 ff_vorbisdsp_init(&vc->dsp);
1032 ff_fmt_convert_init(&vc->fmt_conv, avctx);
1034 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1037 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1038 return AVERROR_INVALIDDATA;
1041 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1042 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1046 init_get_bits(gb, header_start[0], header_len[0]*8);
1047 hdr_type = get_bits(gb, 8);
1048 if (hdr_type != 1) {
1049 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1050 return AVERROR_INVALIDDATA;
1052 if ((ret = vorbis_parse_id_hdr(vc))) {
1053 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1058 init_get_bits(gb, header_start[2], header_len[2]*8);
1059 hdr_type = get_bits(gb, 8);
1060 if (hdr_type != 5) {
1061 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1063 return AVERROR_INVALIDDATA;
1065 if ((ret = vorbis_parse_setup_hdr(vc))) {
1066 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1071 if (vc->audio_channels > 8)
1072 avctx->channel_layout = 0;
1074 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1076 avctx->channels = vc->audio_channels;
1077 avctx->sample_rate = vc->audio_samplerate;
1082 // Decode audiopackets -------------------------------------------------
1084 // Read and decode floor
1086 static int vorbis_floor0_decode(vorbis_context *vc,
1087 vorbis_floor_data *vfu, float *vec)
1089 vorbis_floor0 *vf = &vfu->t0;
1090 float *lsp = vf->lsp;
1091 unsigned amplitude, book_idx;
1092 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1094 if (!vf->amplitude_bits)
1097 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1098 if (amplitude > 0) {
1100 unsigned idx, lsp_len = 0;
1101 vorbis_codebook codebook;
1103 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1104 if (book_idx >= vf->num_books) {
1105 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1108 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1109 codebook = vc->codebooks[vf->book_list[book_idx]];
1110 /* Invalid codebook! */
1111 if (!codebook.codevectors)
1112 return AVERROR_INVALIDDATA;
1114 while (lsp_len<vf->order) {
1117 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1118 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1119 /* read temp vector */
1120 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1121 codebook.nb_bits, codebook.maxdepth)
1122 * codebook.dimensions;
1123 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1124 /* copy each vector component and add last to it */
1125 for (idx = 0; idx < codebook.dimensions; ++idx)
1126 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1127 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1129 lsp_len += codebook.dimensions;
1131 /* DEBUG: output lsp coeffs */
1134 for (idx = 0; idx < lsp_len; ++idx)
1135 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1138 /* synthesize floor output vector */
1141 int order = vf->order;
1142 float wstep = M_PI / vf->bark_map_size;
1144 for (i = 0; i < order; i++)
1145 lsp[i] = 2.0f * cos(lsp[i]);
1147 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1148 vf->map_size[blockflag], order, wstep);
1151 while (i < vf->map_size[blockflag]) {
1152 int j, iter_cond = vf->map[blockflag][i];
1155 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1157 /* similar part for the q and p products */
1158 for (j = 0; j + 1 < order; j += 2) {
1159 q *= lsp[j] - two_cos_w;
1160 p *= lsp[j + 1] - two_cos_w;
1162 if (j == order) { // even order
1163 p *= p * (2.0f - two_cos_w);
1164 q *= q * (2.0f + two_cos_w);
1165 } else { // odd order
1166 q *= two_cos_w-lsp[j]; // one more time for q
1168 /* final step and square */
1169 p *= p * (4.f - two_cos_w * two_cos_w);
1173 /* calculate linear floor value */
1174 q = exp((((amplitude*vf->amplitude_offset) /
1175 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1176 - vf->amplitude_offset) * .11512925f);
1181 } while (vf->map[blockflag][i] == iter_cond);
1185 /* this channel is unused */
1189 av_dlog(NULL, " Floor0 decoded\n");
1194 static int vorbis_floor1_decode(vorbis_context *vc,
1195 vorbis_floor_data *vfu, float *vec)
1197 vorbis_floor1 *vf = &vfu->t1;
1198 GetBitContext *gb = &vc->gb;
1199 uint16_t range_v[4] = { 256, 128, 86, 64 };
1200 unsigned range = range_v[vf->multiplier - 1];
1201 uint16_t floor1_Y[258];
1202 uint16_t floor1_Y_final[258];
1203 int floor1_flag[258];
1204 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1205 int book, adx, ady, dy, off, predicted, err;
1208 if (!get_bits1(gb)) // silence
1211 // Read values (or differences) for the floor's points
1213 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1214 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1216 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1219 for (i = 0; i < vf->partitions; ++i) {
1220 partition_class = vf->partition_class[i];
1221 cdim = vf->class_dimensions[partition_class];
1222 cbits = vf->class_subclasses[partition_class];
1223 csub = (1 << cbits) - 1;
1226 av_dlog(NULL, "Cbits %u\n", cbits);
1228 if (cbits) // this reads all subclasses for this partition's class
1229 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1230 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1232 for (j = 0; j < cdim; ++j) {
1233 book = vf->subclass_books[partition_class][cval & csub];
1235 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1236 book, cbits, cval, get_bits_count(gb));
1238 cval = cval >> cbits;
1240 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1241 vc->codebooks[book].nb_bits, 3);
1243 return AVERROR_INVALIDDATA;
1244 floor1_Y[offset+j] = v;
1246 floor1_Y[offset+j] = 0;
1249 av_dlog(NULL, " floor(%d) = %d \n",
1250 vf->list[offset+j].x, floor1_Y[offset+j]);
1255 // Amplitude calculation from the differences
1259 floor1_Y_final[0] = floor1_Y[0];
1260 floor1_Y_final[1] = floor1_Y[1];
1262 for (i = 2; i < vf->x_list_dim; ++i) {
1263 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1265 low_neigh_offs = vf->list[i].low;
1266 high_neigh_offs = vf->list[i].high;
1267 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1268 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1270 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1273 predicted = floor1_Y_final[low_neigh_offs] - off;
1275 predicted = floor1_Y_final[low_neigh_offs] + off;
1276 } // render_point end
1279 highroom = range-predicted;
1280 lowroom = predicted;
1281 if (highroom < lowroom) {
1282 room = highroom * 2;
1284 room = lowroom * 2; // SPEC misspelling
1287 floor1_flag[low_neigh_offs] = 1;
1288 floor1_flag[high_neigh_offs] = 1;
1291 if (highroom > lowroom) {
1292 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1294 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1298 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1300 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1305 floor1_Y_final[i] = av_clip_uint16(predicted);
1308 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1309 vf->list[i].x, floor1_Y_final[i], val);
1312 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1314 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1316 av_dlog(NULL, " Floor decoded\n");
1321 static av_always_inline int setup_classifs(vorbis_context *vc,
1323 uint8_t *do_not_decode,
1325 int partition_count,
1330 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1331 unsigned inverse_class = ff_inverse[vr->classifications];
1332 unsigned temp, temp2;
1333 for (p = 0, j = 0; j < ch_used; ++j) {
1334 if (!do_not_decode[j]) {
1335 temp = get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1336 vc->codebooks[vr->classbook].nb_bits, 3);
1338 av_dlog(NULL, "Classword: %u\n", temp);
1343 av_assert0(vr->classifications > 1); //needed for inverse[]
1345 if (temp <= 65536) {
1346 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1347 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1349 if (i < ptns_to_read)
1350 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1354 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1355 temp2 = temp / vr->classifications;
1357 if (i < ptns_to_read)
1358 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1367 // Read and decode residue
1369 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1372 uint8_t *do_not_decode,
1378 GetBitContext *gb = &vc->gb;
1379 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1380 uint8_t *classifs = vr->classifs;
1381 unsigned pass, ch_used, i, j, k, l;
1382 unsigned max_output = (ch - 1) * vlen;
1383 int ptns_to_read = vr->ptns_to_read;
1384 int libvorbis_bug = 0;
1387 for (j = 1; j < ch; ++j)
1388 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1389 if (do_not_decode[0])
1392 max_output += vr->end / ch;
1395 max_output += vr->end;
1398 if (max_output > ch_left * vlen) {
1399 if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1403 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1404 return AVERROR_INVALIDDATA;
1408 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1410 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1411 int voffset, partition_count, j_times_ptns_to_read;
1413 voffset = vr->begin;
1414 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1417 if ((ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read)) < 0)
1420 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1421 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1424 if (!do_not_decode[j]) {
1425 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1426 int vqbook = vr->books[vqclass][pass];
1428 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1430 unsigned dim = vc->codebooks[vqbook].dimensions;
1431 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1432 vorbis_codebook codebook = vc->codebooks[vqbook];
1436 voffs = voffset+j*vlen;
1437 for (k = 0; k < step; ++k) {
1438 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1439 for (l = 0; l < dim; ++l)
1440 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1442 } else if (vr_type == 1) {
1443 voffs = voffset + j * vlen;
1444 for (k = 0; k < step; ++k) {
1445 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1446 for (l = 0; l < dim; ++l, ++voffs) {
1447 vec[voffs]+=codebook.codevectors[coffs+l];
1449 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1450 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1453 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1454 voffs = voffset >> 1;
1457 for (k = 0; k < step; ++k) {
1458 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1459 vec[voffs + k ] += codebook.codevectors[coffs ];
1460 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1462 } else if (dim == 4) {
1463 for (k = 0; k < step; ++k, voffs += 2) {
1464 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1465 vec[voffs ] += codebook.codevectors[coffs ];
1466 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1467 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1468 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1471 for (k = 0; k < step; ++k) {
1472 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1473 for (l = 0; l < dim; l += 2, voffs++) {
1474 vec[voffs ] += codebook.codevectors[coffs + l ];
1475 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1477 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1478 pass, voffset / ch + (voffs % ch) * vlen,
1479 vec[voffset / ch + (voffs % ch) * vlen],
1480 codebook.codevectors[coffs + l], coffs, l);
1484 } else if (vr_type == 2) {
1485 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1486 unsigned voffs_mod = voffset - voffs_div * ch;
1488 for (k = 0; k < step; ++k) {
1489 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1490 for (l = 0; l < dim; ++l) {
1491 vec[voffs_div + voffs_mod * vlen] +=
1492 codebook.codevectors[coffs + l];
1494 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1495 pass, voffs_div + voffs_mod * vlen,
1496 vec[voffs_div + voffs_mod * vlen],
1497 codebook.codevectors[coffs + l], coffs, l);
1499 if (++voffs_mod == ch) {
1508 j_times_ptns_to_read += ptns_to_read;
1511 voffset += vr->partition_size;
1514 if (libvorbis_bug && !pass) {
1515 for (j = 0; j < ch_used; ++j) {
1516 if (!do_not_decode[j]) {
1517 get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1518 vc->codebooks[vr->classbook].nb_bits, 3);
1526 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1528 uint8_t *do_not_decode,
1529 float *vec, unsigned vlen,
1533 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1534 else if (vr->type == 1)
1535 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1536 else if (vr->type == 0)
1537 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1539 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1540 return AVERROR_INVALIDDATA;
1544 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1547 for (i = 0; i < blocksize; i++) {
1550 ang[i] = mag[i] - ang[i];
1552 float temp = ang[i];
1560 float temp = ang[i];
1568 // Decode the audio packet using the functions above
1570 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1572 GetBitContext *gb = &vc->gb;
1574 int previous_window = vc->previous_window;
1575 unsigned mode_number, blockflag, blocksize;
1577 uint8_t no_residue[255];
1578 uint8_t do_not_decode[255];
1579 vorbis_mapping *mapping;
1580 float *ch_res_ptr = vc->channel_residues;
1581 uint8_t res_chan[255];
1582 unsigned res_num = 0;
1584 unsigned ch_left = vc->audio_channels;
1587 if (get_bits1(gb)) {
1588 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1589 return AVERROR_INVALIDDATA; // packet type not audio
1592 if (vc->mode_count == 1) {
1595 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1597 vc->mode_number = mode_number;
1598 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1600 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1601 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1603 blockflag = vc->modes[mode_number].blockflag;
1604 blocksize = vc->blocksize[blockflag];
1605 vlen = blocksize / 2;
1607 int code = get_bits(gb, 2);
1608 if (previous_window < 0)
1609 previous_window = code>>1;
1610 } else if (previous_window < 0)
1611 previous_window = 0;
1613 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1614 for (i = 0; i < vc->audio_channels; ++i)
1615 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1619 for (i = 0; i < vc->audio_channels; ++i) {
1620 vorbis_floor *floor;
1622 if (mapping->submaps > 1) {
1623 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1625 floor = &vc->floors[mapping->submap_floor[0]];
1628 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1631 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1632 return AVERROR_INVALIDDATA;
1634 no_residue[i] = ret;
1637 // Nonzero vector propagate
1639 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1640 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1641 no_residue[mapping->magnitude[i]] = 0;
1642 no_residue[mapping->angle[i]] = 0;
1648 for (i = 0; i < mapping->submaps; ++i) {
1649 vorbis_residue *residue;
1653 for (j = 0; j < vc->audio_channels; ++j) {
1654 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1655 res_chan[j] = res_num;
1656 if (no_residue[j]) {
1657 do_not_decode[ch] = 1;
1659 do_not_decode[ch] = 0;
1665 residue = &vc->residues[mapping->submap_residue[i]];
1667 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1668 return AVERROR_INVALIDDATA;
1671 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1676 ch_res_ptr += ch * vlen;
1681 return AVERROR_INVALIDDATA;
1685 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1688 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1689 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1690 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1695 mdct = &vc->mdct[blockflag];
1697 for (j = vc->audio_channels-1;j >= 0; j--) {
1698 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1699 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1700 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1703 // Overlap/add, save data for next overlapping
1705 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1706 for (j = 0; j < vc->audio_channels; j++) {
1707 unsigned bs0 = vc->blocksize[0];
1708 unsigned bs1 = vc->blocksize[1];
1709 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1710 float *saved = vc->saved + j * bs1 / 4;
1711 float *ret = floor_ptr[j];
1712 float *buf = residue;
1713 const float *win = vc->win[blockflag & previous_window];
1715 if (blockflag == previous_window) {
1716 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1717 } else if (blockflag > previous_window) {
1718 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1719 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1721 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1722 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1724 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1727 vc->previous_window = blockflag;
1731 // Return the decoded audio packet through the standard api
1733 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1734 int *got_frame_ptr, AVPacket *avpkt)
1736 const uint8_t *buf = avpkt->data;
1737 int buf_size = avpkt->size;
1738 vorbis_context *vc = avctx->priv_data;
1739 AVFrame *frame = data;
1740 GetBitContext *gb = &vc->gb;
1741 float *channel_ptrs[255];
1744 av_dlog(NULL, "packet length %d \n", buf_size);
1746 if (*buf == 1 && buf_size > 7) {
1747 init_get_bits(gb, buf+1, buf_size*8 - 8);
1749 if ((ret = vorbis_parse_id_hdr(vc))) {
1750 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1755 if (vc->audio_channels > 8)
1756 avctx->channel_layout = 0;
1758 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1760 avctx->channels = vc->audio_channels;
1761 avctx->sample_rate = vc->audio_samplerate;
1765 if (*buf == 3 && buf_size > 7) {
1766 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1770 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1771 init_get_bits(gb, buf+1, buf_size*8 - 8);
1772 if ((ret = vorbis_parse_setup_hdr(vc))) {
1773 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1780 if (!vc->channel_residues || !vc->modes) {
1781 av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1782 return AVERROR_INVALIDDATA;
1785 /* get output buffer */
1786 frame->nb_samples = vc->blocksize[1] / 2;
1787 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1790 if (vc->audio_channels > 8) {
1791 for (i = 0; i < vc->audio_channels; i++)
1792 channel_ptrs[i] = (float *)frame->extended_data[i];
1794 for (i = 0; i < vc->audio_channels; i++) {
1795 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1796 channel_ptrs[ch] = (float *)frame->extended_data[i];
1800 init_get_bits(gb, buf, buf_size*8);
1802 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1805 if (!vc->first_frame) {
1806 vc->first_frame = 1;
1808 av_frame_unref(frame);
1812 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1813 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1815 frame->nb_samples = len;
1823 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1825 vorbis_context *vc = avctx->priv_data;
1832 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1834 vorbis_context *vc = avctx->priv_data;
1837 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1838 sizeof(*vc->saved));
1840 vc->previous_window = -1;
1841 vc->first_frame = 0;
1844 AVCodec ff_vorbis_decoder = {
1846 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1847 .type = AVMEDIA_TYPE_AUDIO,
1848 .id = AV_CODEC_ID_VORBIS,
1849 .priv_data_size = sizeof(vorbis_context),
1850 .init = vorbis_decode_init,
1851 .close = vorbis_decode_close,
1852 .decode = vorbis_decode_frame,
1853 .flush = vorbis_decode_flush,
1854 .capabilities = CODEC_CAP_DR1,
1855 .channel_layouts = ff_vorbis_channel_layouts,
1856 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1857 AV_SAMPLE_FMT_NONE },