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 ret = AVERROR(ENOMEM);
391 codebook_setup->codevectors = NULL;
393 for (j = 0, i = 0; i < entries; ++i) {
394 unsigned dim = codebook_setup->dimensions;
396 if (tmp_vlc_bits[i]) {
398 unsigned lookup_offset = i;
400 av_dlog(vc->avctx, "Lookup offset %u ,", i);
402 for (k = 0; k < dim; ++k) {
403 unsigned multiplicand_offset = lookup_offset % codebook_lookup_values;
404 codebook_setup->codevectors[j * dim + k] = codebook_multiplicands[multiplicand_offset] * codebook_delta_value + codebook_minimum_value + last;
405 if (codebook_sequence_p)
406 last = codebook_setup->codevectors[j * dim + k];
407 lookup_offset/=codebook_lookup_values;
409 tmp_vlc_bits[j] = tmp_vlc_bits[i];
411 av_dlog(vc->avctx, "real lookup offset %u, vector: ", j);
412 for (k = 0; k < dim; ++k)
413 av_dlog(vc->avctx, " %f ",
414 codebook_setup->codevectors[j * dim + k]);
415 av_dlog(vc->avctx, "\n");
420 if (j != used_entries) {
421 av_log(vc->avctx, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
422 ret = AVERROR_INVALIDDATA;
425 entries = used_entries;
426 } else if (codebook_setup->lookup_type >= 2) {
427 av_log(vc->avctx, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
428 ret = AVERROR_INVALIDDATA;
432 // Initialize VLC table
433 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
434 av_log(vc->avctx, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
435 ret = AVERROR_INVALIDDATA;
438 codebook_setup->maxdepth = 0;
439 for (t = 0; t < entries; ++t)
440 if (tmp_vlc_bits[t] >= codebook_setup->maxdepth)
441 codebook_setup->maxdepth = tmp_vlc_bits[t];
443 if (codebook_setup->maxdepth > 3 * V_NB_BITS)
444 codebook_setup->nb_bits = V_NB_BITS2;
446 codebook_setup->nb_bits = V_NB_BITS;
448 codebook_setup->maxdepth = (codebook_setup->maxdepth+codebook_setup->nb_bits - 1) / codebook_setup->nb_bits;
450 if ((ret = init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits,
451 entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits),
452 sizeof(*tmp_vlc_bits), tmp_vlc_codes,
453 sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes),
455 av_log(vc->avctx, AV_LOG_ERROR, " Error generating vlc tables. \n");
460 av_free(tmp_vlc_bits);
461 av_free(tmp_vlc_codes);
462 av_free(codebook_multiplicands);
467 av_free(tmp_vlc_bits);
468 av_free(tmp_vlc_codes);
469 av_free(codebook_multiplicands);
473 // Process time domain transforms part (unused in Vorbis I)
475 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
477 GetBitContext *gb = &vc->gb;
478 unsigned i, vorbis_time_count = get_bits(gb, 6) + 1;
480 for (i = 0; i < vorbis_time_count; ++i) {
481 unsigned vorbis_tdtransform = get_bits(gb, 16);
483 av_dlog(NULL, " Vorbis time domain transform %u: %u\n",
484 vorbis_time_count, vorbis_tdtransform);
486 if (vorbis_tdtransform) {
487 av_log(vc->avctx, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
488 return AVERROR_INVALIDDATA;
494 // Process floors part
496 static int vorbis_floor0_decode(vorbis_context *vc,
497 vorbis_floor_data *vfu, float *vec);
498 static int create_map(vorbis_context *vc, unsigned floor_number);
499 static int vorbis_floor1_decode(vorbis_context *vc,
500 vorbis_floor_data *vfu, float *vec);
501 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
503 GetBitContext *gb = &vc->gb;
506 vc->floor_count = get_bits(gb, 6) + 1;
508 vc->floors = av_mallocz(vc->floor_count * sizeof(*vc->floors));
510 return AVERROR(ENOMEM);
512 for (i = 0; i < vc->floor_count; ++i) {
513 vorbis_floor *floor_setup = &vc->floors[i];
515 floor_setup->floor_type = get_bits(gb, 16);
517 av_dlog(NULL, " %d. floor type %d \n", i, floor_setup->floor_type);
519 if (floor_setup->floor_type == 1) {
520 int maximum_class = -1;
521 unsigned rangebits, rangemax, floor1_values = 2;
523 floor_setup->decode = vorbis_floor1_decode;
525 floor_setup->data.t1.partitions = get_bits(gb, 5);
527 av_dlog(NULL, " %d.floor: %d partitions \n",
528 i, floor_setup->data.t1.partitions);
530 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
531 floor_setup->data.t1.partition_class[j] = get_bits(gb, 4);
532 if (floor_setup->data.t1.partition_class[j] > maximum_class)
533 maximum_class = floor_setup->data.t1.partition_class[j];
535 av_dlog(NULL, " %d. floor %d partition class %d \n",
536 i, j, floor_setup->data.t1.partition_class[j]);
540 av_dlog(NULL, " maximum class %d \n", maximum_class);
542 for (j = 0; j <= maximum_class; ++j) {
543 floor_setup->data.t1.class_dimensions[j] = get_bits(gb, 3) + 1;
544 floor_setup->data.t1.class_subclasses[j] = get_bits(gb, 2);
546 av_dlog(NULL, " %d floor %d class dim: %d subclasses %d \n", i, j,
547 floor_setup->data.t1.class_dimensions[j],
548 floor_setup->data.t1.class_subclasses[j]);
550 if (floor_setup->data.t1.class_subclasses[j]) {
551 GET_VALIDATED_INDEX(floor_setup->data.t1.class_masterbook[j], 8, vc->codebook_count)
553 av_dlog(NULL, " masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
556 for (k = 0; k < (1 << floor_setup->data.t1.class_subclasses[j]); ++k) {
557 int16_t bits = get_bits(gb, 8) - 1;
559 VALIDATE_INDEX(bits, vc->codebook_count)
560 floor_setup->data.t1.subclass_books[j][k] = bits;
562 av_dlog(NULL, " book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
566 floor_setup->data.t1.multiplier = get_bits(gb, 2) + 1;
567 floor_setup->data.t1.x_list_dim = 2;
569 for (j = 0; j < floor_setup->data.t1.partitions; ++j)
570 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
572 floor_setup->data.t1.list = av_mallocz_array(floor_setup->data.t1.x_list_dim,
573 sizeof(*floor_setup->data.t1.list));
574 if (!floor_setup->data.t1.list)
575 return AVERROR(ENOMEM);
577 rangebits = get_bits(gb, 4);
578 rangemax = (1 << rangebits);
579 if (rangemax > vc->blocksize[1] / 2) {
580 av_log(vc->avctx, AV_LOG_ERROR,
581 "Floor value is too large for blocksize: %u (%"PRIu32")\n",
582 rangemax, vc->blocksize[1] / 2);
583 return AVERROR_INVALIDDATA;
585 floor_setup->data.t1.list[0].x = 0;
586 floor_setup->data.t1.list[1].x = rangemax;
588 for (j = 0; j < floor_setup->data.t1.partitions; ++j) {
589 for (k = 0; k < floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]]; ++k, ++floor1_values) {
590 floor_setup->data.t1.list[floor1_values].x = get_bits(gb, rangebits);
592 av_dlog(NULL, " %u. floor1 Y coord. %d\n", floor1_values,
593 floor_setup->data.t1.list[floor1_values].x);
597 // Precalculate order of x coordinates - needed for decode
598 if (ff_vorbis_ready_floor1_list(vc->avctx,
599 floor_setup->data.t1.list,
600 floor_setup->data.t1.x_list_dim)) {
601 return AVERROR_INVALIDDATA;
603 } else if (floor_setup->floor_type == 0) {
604 unsigned max_codebook_dim = 0;
606 floor_setup->decode = vorbis_floor0_decode;
608 floor_setup->data.t0.order = get_bits(gb, 8);
609 if (!floor_setup->data.t0.order) {
610 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 order is 0.\n");
611 return AVERROR_INVALIDDATA;
613 floor_setup->data.t0.rate = get_bits(gb, 16);
614 if (!floor_setup->data.t0.rate) {
615 av_log(vc->avctx, AV_LOG_ERROR, "Floor 0 rate is 0.\n");
616 return AVERROR_INVALIDDATA;
618 floor_setup->data.t0.bark_map_size = get_bits(gb, 16);
619 if (!floor_setup->data.t0.bark_map_size) {
620 av_log(vc->avctx, AV_LOG_ERROR,
621 "Floor 0 bark map size is 0.\n");
622 return AVERROR_INVALIDDATA;
624 floor_setup->data.t0.amplitude_bits = get_bits(gb, 6);
625 floor_setup->data.t0.amplitude_offset = get_bits(gb, 8);
626 floor_setup->data.t0.num_books = get_bits(gb, 4) + 1;
628 /* allocate mem for booklist */
629 floor_setup->data.t0.book_list =
630 av_malloc(floor_setup->data.t0.num_books);
631 if (!floor_setup->data.t0.book_list)
632 return AVERROR(ENOMEM);
633 /* read book indexes */
637 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
638 GET_VALIDATED_INDEX(book_idx, 8, vc->codebook_count)
639 floor_setup->data.t0.book_list[idx] = book_idx;
640 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
641 max_codebook_dim = vc->codebooks[book_idx].dimensions;
645 if ((ret = create_map(vc, i)) < 0)
648 /* codebook dim is for padding if codebook dim doesn't *
649 * divide order+1 then we need to read more data */
650 floor_setup->data.t0.lsp =
651 av_malloc_array((floor_setup->data.t0.order + 1 + max_codebook_dim),
652 sizeof(*floor_setup->data.t0.lsp));
653 if (!floor_setup->data.t0.lsp)
654 return AVERROR(ENOMEM);
656 /* debug output parsed headers */
657 av_dlog(NULL, "floor0 order: %u\n", floor_setup->data.t0.order);
658 av_dlog(NULL, "floor0 rate: %u\n", floor_setup->data.t0.rate);
659 av_dlog(NULL, "floor0 bark map size: %u\n",
660 floor_setup->data.t0.bark_map_size);
661 av_dlog(NULL, "floor0 amplitude bits: %u\n",
662 floor_setup->data.t0.amplitude_bits);
663 av_dlog(NULL, "floor0 amplitude offset: %u\n",
664 floor_setup->data.t0.amplitude_offset);
665 av_dlog(NULL, "floor0 number of books: %u\n",
666 floor_setup->data.t0.num_books);
667 av_dlog(NULL, "floor0 book list pointer: %p\n",
668 floor_setup->data.t0.book_list);
671 for (idx = 0; idx < floor_setup->data.t0.num_books; ++idx) {
672 av_dlog(NULL, " Book %d: %u\n", idx + 1,
673 floor_setup->data.t0.book_list[idx]);
677 av_log(vc->avctx, AV_LOG_ERROR, "Invalid floor type!\n");
678 return AVERROR_INVALIDDATA;
684 // Process residues part
686 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
688 GetBitContext *gb = &vc->gb;
691 vc->residue_count = get_bits(gb, 6)+1;
692 vc->residues = av_mallocz(vc->residue_count * sizeof(*vc->residues));
694 return AVERROR(ENOMEM);
696 av_dlog(NULL, " There are %d residues. \n", vc->residue_count);
698 for (i = 0; i < vc->residue_count; ++i) {
699 vorbis_residue *res_setup = &vc->residues[i];
701 unsigned high_bits, low_bits;
703 res_setup->type = get_bits(gb, 16);
705 av_dlog(NULL, " %u. residue type %d\n", i, res_setup->type);
707 res_setup->begin = get_bits(gb, 24);
708 res_setup->end = get_bits(gb, 24);
709 res_setup->partition_size = get_bits(gb, 24) + 1;
710 /* Validations to prevent a buffer overflow later. */
711 if (res_setup->begin>res_setup->end ||
712 (res_setup->end-res_setup->begin) / res_setup->partition_size > FFMIN(V_MAX_PARTITIONS, 65535)) {
713 av_log(vc->avctx, AV_LOG_ERROR,
714 "partition out of bounds: type, begin, end, size, blocksize: %"PRIu16", %"PRIu32", %"PRIu32", %u, %"PRIu32"\n",
715 res_setup->type, res_setup->begin, res_setup->end,
716 res_setup->partition_size, vc->blocksize[1] / 2);
717 return AVERROR_INVALIDDATA;
720 res_setup->classifications = get_bits(gb, 6) + 1;
721 GET_VALIDATED_INDEX(res_setup->classbook, 8, vc->codebook_count)
723 res_setup->ptns_to_read =
724 (res_setup->end - res_setup->begin) / res_setup->partition_size;
725 res_setup->classifs = av_malloc_array(res_setup->ptns_to_read,
727 sizeof(*res_setup->classifs));
728 if (!res_setup->classifs)
729 return AVERROR(ENOMEM);
731 av_dlog(NULL, " begin %d end %d part.size %d classif.s %d classbook %d \n",
732 res_setup->begin, res_setup->end, res_setup->partition_size,
733 res_setup->classifications, res_setup->classbook);
735 for (j = 0; j < res_setup->classifications; ++j) {
737 low_bits = get_bits(gb, 3);
739 high_bits = get_bits(gb, 5);
740 cascade[j] = (high_bits << 3) + low_bits;
742 av_dlog(NULL, " %u class cascade depth: %d\n", j, ilog(cascade[j]));
745 res_setup->maxpass = 0;
746 for (j = 0; j < res_setup->classifications; ++j) {
747 for (k = 0; k < 8; ++k) {
748 if (cascade[j]&(1 << k)) {
749 GET_VALIDATED_INDEX(res_setup->books[j][k], 8, vc->codebook_count)
751 av_dlog(NULL, " %u class cascade depth %u book: %d\n",
752 j, k, res_setup->books[j][k]);
754 if (k>res_setup->maxpass)
755 res_setup->maxpass = k;
757 res_setup->books[j][k] = -1;
765 // Process mappings part
767 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
769 GetBitContext *gb = &vc->gb;
772 vc->mapping_count = get_bits(gb, 6)+1;
773 vc->mappings = av_mallocz(vc->mapping_count * sizeof(*vc->mappings));
775 return AVERROR(ENOMEM);
777 av_dlog(NULL, " There are %d mappings. \n", vc->mapping_count);
779 for (i = 0; i < vc->mapping_count; ++i) {
780 vorbis_mapping *mapping_setup = &vc->mappings[i];
782 if (get_bits(gb, 16)) {
783 av_log(vc->avctx, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
784 return AVERROR_INVALIDDATA;
787 mapping_setup->submaps = get_bits(gb, 4) + 1;
789 mapping_setup->submaps = 1;
793 mapping_setup->coupling_steps = get_bits(gb, 8) + 1;
794 mapping_setup->magnitude = av_mallocz(mapping_setup->coupling_steps *
795 sizeof(*mapping_setup->magnitude));
796 mapping_setup->angle = av_mallocz(mapping_setup->coupling_steps *
797 sizeof(*mapping_setup->angle));
798 if (!mapping_setup->angle || !mapping_setup->magnitude)
799 return AVERROR(ENOMEM);
801 for (j = 0; j < mapping_setup->coupling_steps; ++j) {
802 GET_VALIDATED_INDEX(mapping_setup->magnitude[j], ilog(vc->audio_channels - 1), vc->audio_channels)
803 GET_VALIDATED_INDEX(mapping_setup->angle[j], ilog(vc->audio_channels - 1), vc->audio_channels)
806 mapping_setup->coupling_steps = 0;
809 av_dlog(NULL, " %u mapping coupling steps: %d\n",
810 i, mapping_setup->coupling_steps);
812 if (get_bits(gb, 2)) {
813 av_log(vc->avctx, AV_LOG_ERROR, "%u. mapping setup data invalid.\n", i);
814 return AVERROR_INVALIDDATA; // following spec.
817 if (mapping_setup->submaps>1) {
818 mapping_setup->mux = av_mallocz_array(vc->audio_channels,
819 sizeof(*mapping_setup->mux));
820 if (!mapping_setup->mux)
821 return AVERROR(ENOMEM);
823 for (j = 0; j < vc->audio_channels; ++j)
824 mapping_setup->mux[j] = get_bits(gb, 4);
827 for (j = 0; j < mapping_setup->submaps; ++j) {
828 skip_bits(gb, 8); // FIXME check?
829 GET_VALIDATED_INDEX(mapping_setup->submap_floor[j], 8, vc->floor_count)
830 GET_VALIDATED_INDEX(mapping_setup->submap_residue[j], 8, vc->residue_count)
832 av_dlog(NULL, " %u mapping %u submap : floor %d, residue %d\n", i, j,
833 mapping_setup->submap_floor[j],
834 mapping_setup->submap_residue[j]);
840 // Process modes part
842 static int create_map(vorbis_context *vc, unsigned floor_number)
844 vorbis_floor *floors = vc->floors;
850 for (blockflag = 0; blockflag < 2; ++blockflag) {
851 n = vc->blocksize[blockflag] / 2;
852 floors[floor_number].data.t0.map[blockflag] =
853 av_malloc_array(n + 1, sizeof(int32_t)); // n + sentinel
854 if (!floors[floor_number].data.t0.map[blockflag])
855 return AVERROR(ENOMEM);
857 map = floors[floor_number].data.t0.map[blockflag];
858 vf = &floors[floor_number].data.t0;
860 for (idx = 0; idx < n; ++idx) {
861 map[idx] = floor(BARK((vf->rate * idx) / (2.0f * n)) *
862 (vf->bark_map_size / BARK(vf->rate / 2.0f)));
863 if (vf->bark_map_size-1 < map[idx])
864 map[idx] = vf->bark_map_size - 1;
867 vf->map_size[blockflag] = n;
870 for (idx = 0; idx <= n; ++idx) {
871 av_dlog(NULL, "floor0 map: map at pos %d is %d\n", idx, map[idx]);
877 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
879 GetBitContext *gb = &vc->gb;
882 vc->mode_count = get_bits(gb, 6) + 1;
883 vc->modes = av_mallocz(vc->mode_count * sizeof(*vc->modes));
885 return AVERROR(ENOMEM);
887 av_dlog(NULL, " There are %d modes.\n", vc->mode_count);
889 for (i = 0; i < vc->mode_count; ++i) {
890 vorbis_mode *mode_setup = &vc->modes[i];
892 mode_setup->blockflag = get_bits1(gb);
893 mode_setup->windowtype = get_bits(gb, 16); //FIXME check
894 mode_setup->transformtype = get_bits(gb, 16); //FIXME check
895 GET_VALIDATED_INDEX(mode_setup->mapping, 8, vc->mapping_count);
897 av_dlog(NULL, " %u mode: blockflag %d, windowtype %d, transformtype %d, mapping %d\n",
898 i, mode_setup->blockflag, mode_setup->windowtype,
899 mode_setup->transformtype, mode_setup->mapping);
904 // Process the whole setup header using the functions above
906 static int vorbis_parse_setup_hdr(vorbis_context *vc)
908 GetBitContext *gb = &vc->gb;
911 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
912 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
913 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
914 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
915 return AVERROR_INVALIDDATA;
918 if ((ret = vorbis_parse_setup_hdr_codebooks(vc))) {
919 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
922 if ((ret = vorbis_parse_setup_hdr_tdtransforms(vc))) {
923 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
926 if ((ret = vorbis_parse_setup_hdr_floors(vc))) {
927 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
930 if ((ret = vorbis_parse_setup_hdr_residues(vc))) {
931 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
934 if ((ret = vorbis_parse_setup_hdr_mappings(vc))) {
935 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
938 if ((ret = vorbis_parse_setup_hdr_modes(vc))) {
939 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
942 if (!get_bits1(gb)) {
943 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
944 return AVERROR_INVALIDDATA; // framing flag bit unset error
950 // Process the identification header
952 static int vorbis_parse_id_hdr(vorbis_context *vc)
954 GetBitContext *gb = &vc->gb;
957 if ((get_bits(gb, 8) != 'v') || (get_bits(gb, 8) != 'o') ||
958 (get_bits(gb, 8) != 'r') || (get_bits(gb, 8) != 'b') ||
959 (get_bits(gb, 8) != 'i') || (get_bits(gb, 8) != 's')) {
960 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
961 return AVERROR_INVALIDDATA;
964 vc->version = get_bits_long(gb, 32); //FIXME check 0
965 vc->audio_channels = get_bits(gb, 8);
966 if (vc->audio_channels <= 0) {
967 av_log(vc->avctx, AV_LOG_ERROR, "Invalid number of channels\n");
968 return AVERROR_INVALIDDATA;
970 vc->audio_samplerate = get_bits_long(gb, 32);
971 if (vc->audio_samplerate <= 0) {
972 av_log(vc->avctx, AV_LOG_ERROR, "Invalid samplerate\n");
973 return AVERROR_INVALIDDATA;
975 vc->bitrate_maximum = get_bits_long(gb, 32);
976 vc->bitrate_nominal = get_bits_long(gb, 32);
977 vc->bitrate_minimum = get_bits_long(gb, 32);
978 bl0 = get_bits(gb, 4);
979 bl1 = get_bits(gb, 4);
980 if (bl0 > 13 || bl0 < 6 || bl1 > 13 || bl1 < 6 || bl1 < bl0) {
981 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
982 return AVERROR_INVALIDDATA;
984 vc->blocksize[0] = (1 << bl0);
985 vc->blocksize[1] = (1 << bl1);
986 vc->win[0] = ff_vorbis_vwin[bl0 - 6];
987 vc->win[1] = ff_vorbis_vwin[bl1 - 6];
989 if ((get_bits1(gb)) == 0) {
990 av_log(vc->avctx, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
991 return AVERROR_INVALIDDATA;
994 vc->channel_residues = av_malloc_array(vc->blocksize[1] / 2, vc->audio_channels * sizeof(*vc->channel_residues));
995 vc->saved = av_mallocz_array(vc->blocksize[1] / 4, vc->audio_channels * sizeof(*vc->saved));
996 if (!vc->channel_residues || !vc->saved)
997 return AVERROR(ENOMEM);
999 vc->previous_window = -1;
1001 ff_mdct_init(&vc->mdct[0], bl0, 1, -1.0);
1002 ff_mdct_init(&vc->mdct[1], bl1, 1, -1.0);
1003 vc->fdsp = avpriv_float_dsp_alloc(vc->avctx->flags & CODEC_FLAG_BITEXACT);
1005 return AVERROR(ENOMEM);
1007 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 ",
1008 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1011 BLK = vc->blocksize[0];
1012 for (i = 0; i < BLK / 2; ++i) {
1013 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)));
1020 // Process the extradata using the functions above (identification header, setup header)
1022 static av_cold int vorbis_decode_init(AVCodecContext *avctx)
1024 vorbis_context *vc = avctx->priv_data;
1025 uint8_t *headers = avctx->extradata;
1026 int headers_len = avctx->extradata_size;
1027 const uint8_t *header_start[3];
1029 GetBitContext *gb = &vc->gb;
1033 ff_vorbisdsp_init(&vc->dsp);
1034 ff_fmt_convert_init(&vc->fmt_conv, avctx);
1036 avctx->sample_fmt = AV_SAMPLE_FMT_FLTP;
1039 av_log(avctx, AV_LOG_ERROR, "Extradata missing.\n");
1040 return AVERROR_INVALIDDATA;
1043 if ((ret = avpriv_split_xiph_headers(headers, headers_len, 30, header_start, header_len)) < 0) {
1044 av_log(avctx, AV_LOG_ERROR, "Extradata corrupt.\n");
1048 init_get_bits(gb, header_start[0], header_len[0]*8);
1049 hdr_type = get_bits(gb, 8);
1050 if (hdr_type != 1) {
1051 av_log(avctx, AV_LOG_ERROR, "First header is not the id header.\n");
1052 return AVERROR_INVALIDDATA;
1054 if ((ret = vorbis_parse_id_hdr(vc))) {
1055 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1060 init_get_bits(gb, header_start[2], header_len[2]*8);
1061 hdr_type = get_bits(gb, 8);
1062 if (hdr_type != 5) {
1063 av_log(avctx, AV_LOG_ERROR, "Third header is not the setup header.\n");
1065 return AVERROR_INVALIDDATA;
1067 if ((ret = vorbis_parse_setup_hdr(vc))) {
1068 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1073 if (vc->audio_channels > 8)
1074 avctx->channel_layout = 0;
1076 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1078 avctx->channels = vc->audio_channels;
1079 avctx->sample_rate = vc->audio_samplerate;
1084 // Decode audiopackets -------------------------------------------------
1086 // Read and decode floor
1088 static int vorbis_floor0_decode(vorbis_context *vc,
1089 vorbis_floor_data *vfu, float *vec)
1091 vorbis_floor0 *vf = &vfu->t0;
1092 float *lsp = vf->lsp;
1093 unsigned amplitude, book_idx;
1094 unsigned blockflag = vc->modes[vc->mode_number].blockflag;
1096 if (!vf->amplitude_bits)
1099 amplitude = get_bits(&vc->gb, vf->amplitude_bits);
1100 if (amplitude > 0) {
1102 unsigned idx, lsp_len = 0;
1103 vorbis_codebook codebook;
1105 book_idx = get_bits(&vc->gb, ilog(vf->num_books));
1106 if (book_idx >= vf->num_books) {
1107 av_log(vc->avctx, AV_LOG_ERROR, "floor0 dec: booknumber too high!\n");
1110 av_dlog(NULL, "floor0 dec: booknumber: %u\n", book_idx);
1111 codebook = vc->codebooks[vf->book_list[book_idx]];
1112 /* Invalid codebook! */
1113 if (!codebook.codevectors)
1114 return AVERROR_INVALIDDATA;
1116 while (lsp_len<vf->order) {
1119 av_dlog(NULL, "floor0 dec: book dimension: %d\n", codebook.dimensions);
1120 av_dlog(NULL, "floor0 dec: maximum depth: %d\n", codebook.maxdepth);
1121 /* read temp vector */
1122 vec_off = get_vlc2(&vc->gb, codebook.vlc.table,
1123 codebook.nb_bits, codebook.maxdepth)
1124 * codebook.dimensions;
1125 av_dlog(NULL, "floor0 dec: vector offset: %d\n", vec_off);
1126 /* copy each vector component and add last to it */
1127 for (idx = 0; idx < codebook.dimensions; ++idx)
1128 lsp[lsp_len+idx] = codebook.codevectors[vec_off+idx] + last;
1129 last = lsp[lsp_len+idx-1]; /* set last to last vector component */
1131 lsp_len += codebook.dimensions;
1133 /* DEBUG: output lsp coeffs */
1136 for (idx = 0; idx < lsp_len; ++idx)
1137 av_dlog(NULL, "floor0 dec: coeff at %d is %f\n", idx, lsp[idx]);
1140 /* synthesize floor output vector */
1143 int order = vf->order;
1144 float wstep = M_PI / vf->bark_map_size;
1146 for (i = 0; i < order; i++)
1147 lsp[i] = 2.0f * cos(lsp[i]);
1149 av_dlog(NULL, "floor0 synth: map_size = %"PRIu32"; m = %d; wstep = %f\n",
1150 vf->map_size[blockflag], order, wstep);
1153 while (i < vf->map_size[blockflag]) {
1154 int j, iter_cond = vf->map[blockflag][i];
1157 float two_cos_w = 2.0f * cos(wstep * iter_cond); // needed all times
1159 /* similar part for the q and p products */
1160 for (j = 0; j + 1 < order; j += 2) {
1161 q *= lsp[j] - two_cos_w;
1162 p *= lsp[j + 1] - two_cos_w;
1164 if (j == order) { // even order
1165 p *= p * (2.0f - two_cos_w);
1166 q *= q * (2.0f + two_cos_w);
1167 } else { // odd order
1168 q *= two_cos_w-lsp[j]; // one more time for q
1170 /* final step and square */
1171 p *= p * (4.f - two_cos_w * two_cos_w);
1175 /* calculate linear floor value */
1176 q = exp((((amplitude*vf->amplitude_offset) /
1177 (((1 << vf->amplitude_bits) - 1) * sqrt(p + q)))
1178 - vf->amplitude_offset) * .11512925f);
1183 } while (vf->map[blockflag][i] == iter_cond);
1187 /* this channel is unused */
1191 av_dlog(NULL, " Floor0 decoded\n");
1196 static int vorbis_floor1_decode(vorbis_context *vc,
1197 vorbis_floor_data *vfu, float *vec)
1199 vorbis_floor1 *vf = &vfu->t1;
1200 GetBitContext *gb = &vc->gb;
1201 uint16_t range_v[4] = { 256, 128, 86, 64 };
1202 unsigned range = range_v[vf->multiplier - 1];
1203 uint16_t floor1_Y[258];
1204 uint16_t floor1_Y_final[258];
1205 int floor1_flag[258];
1206 unsigned partition_class, cdim, cbits, csub, cval, offset, i, j;
1207 int book, adx, ady, dy, off, predicted, err;
1210 if (!get_bits1(gb)) // silence
1213 // Read values (or differences) for the floor's points
1215 floor1_Y[0] = get_bits(gb, ilog(range - 1));
1216 floor1_Y[1] = get_bits(gb, ilog(range - 1));
1218 av_dlog(NULL, "floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1221 for (i = 0; i < vf->partitions; ++i) {
1222 partition_class = vf->partition_class[i];
1223 cdim = vf->class_dimensions[partition_class];
1224 cbits = vf->class_subclasses[partition_class];
1225 csub = (1 << cbits) - 1;
1228 av_dlog(NULL, "Cbits %u\n", cbits);
1230 if (cbits) // this reads all subclasses for this partition's class
1231 cval = get_vlc2(gb, vc->codebooks[vf->class_masterbook[partition_class]].vlc.table,
1232 vc->codebooks[vf->class_masterbook[partition_class]].nb_bits, 3);
1234 for (j = 0; j < cdim; ++j) {
1235 book = vf->subclass_books[partition_class][cval & csub];
1237 av_dlog(NULL, "book %d Cbits %u cval %u bits:%d\n",
1238 book, cbits, cval, get_bits_count(gb));
1240 cval = cval >> cbits;
1242 int v = get_vlc2(gb, vc->codebooks[book].vlc.table,
1243 vc->codebooks[book].nb_bits, 3);
1245 return AVERROR_INVALIDDATA;
1246 floor1_Y[offset+j] = v;
1248 floor1_Y[offset+j] = 0;
1251 av_dlog(NULL, " floor(%d) = %d \n",
1252 vf->list[offset+j].x, floor1_Y[offset+j]);
1257 // Amplitude calculation from the differences
1261 floor1_Y_final[0] = floor1_Y[0];
1262 floor1_Y_final[1] = floor1_Y[1];
1264 for (i = 2; i < vf->x_list_dim; ++i) {
1265 unsigned val, highroom, lowroom, room, high_neigh_offs, low_neigh_offs;
1267 low_neigh_offs = vf->list[i].low;
1268 high_neigh_offs = vf->list[i].high;
1269 dy = floor1_Y_final[high_neigh_offs] - floor1_Y_final[low_neigh_offs]; // render_point begin
1270 adx = vf->list[high_neigh_offs].x - vf->list[low_neigh_offs].x;
1272 err = ady * (vf->list[i].x - vf->list[low_neigh_offs].x);
1275 predicted = floor1_Y_final[low_neigh_offs] - off;
1277 predicted = floor1_Y_final[low_neigh_offs] + off;
1278 } // render_point end
1281 highroom = range-predicted;
1282 lowroom = predicted;
1283 if (highroom < lowroom) {
1284 room = highroom * 2;
1286 room = lowroom * 2; // SPEC misspelling
1289 floor1_flag[low_neigh_offs] = 1;
1290 floor1_flag[high_neigh_offs] = 1;
1293 if (highroom > lowroom) {
1294 floor1_Y_final[i] = av_clip_uint16(val - lowroom + predicted);
1296 floor1_Y_final[i] = av_clip_uint16(predicted - val + highroom - 1);
1300 floor1_Y_final[i] = av_clip_uint16(predicted - (val + 1) / 2);
1302 floor1_Y_final[i] = av_clip_uint16(predicted + val / 2);
1307 floor1_Y_final[i] = av_clip_uint16(predicted);
1310 av_dlog(NULL, " Decoded floor(%d) = %u / val %u\n",
1311 vf->list[i].x, floor1_Y_final[i], val);
1314 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1316 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1318 av_dlog(NULL, " Floor decoded\n");
1323 static av_always_inline int setup_classifs(vorbis_context *vc,
1325 uint8_t *do_not_decode,
1327 int partition_count,
1332 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1333 unsigned inverse_class = ff_inverse[vr->classifications];
1334 unsigned temp, temp2;
1335 for (p = 0, j = 0; j < ch_used; ++j) {
1336 if (!do_not_decode[j]) {
1337 temp = get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1338 vc->codebooks[vr->classbook].nb_bits, 3);
1340 av_dlog(NULL, "Classword: %u\n", temp);
1345 av_assert0(vr->classifications > 1); //needed for inverse[]
1347 if (temp <= 65536) {
1348 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1349 temp2 = (((uint64_t)temp) * inverse_class) >> 32;
1351 if (i < ptns_to_read)
1352 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1356 for (i = partition_count + c_p_c - 1; i >= partition_count; i--) {
1357 temp2 = temp / vr->classifications;
1359 if (i < ptns_to_read)
1360 vr->classifs[p + i] = temp - temp2 * vr->classifications;
1369 // Read and decode residue
1371 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1374 uint8_t *do_not_decode,
1380 GetBitContext *gb = &vc->gb;
1381 unsigned c_p_c = vc->codebooks[vr->classbook].dimensions;
1382 uint8_t *classifs = vr->classifs;
1383 unsigned pass, ch_used, i, j, k, l;
1384 unsigned max_output = (ch - 1) * vlen;
1385 int ptns_to_read = vr->ptns_to_read;
1386 int libvorbis_bug = 0;
1389 for (j = 1; j < ch; ++j)
1390 do_not_decode[0] &= do_not_decode[j]; // FIXME - clobbering input
1391 if (do_not_decode[0])
1394 max_output += vr->end / ch;
1397 max_output += vr->end;
1400 if (max_output > ch_left * vlen) {
1401 if (max_output <= ch_left * vlen + vr->partition_size*ch_used/ch) {
1405 av_log(vc->avctx, AV_LOG_ERROR, "Insufficient output buffer\n");
1406 return AVERROR_INVALIDDATA;
1410 av_dlog(NULL, " residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1412 for (pass = 0; pass <= vr->maxpass; ++pass) { // FIXME OPTIMIZE?
1413 int voffset, partition_count, j_times_ptns_to_read;
1415 voffset = vr->begin;
1416 for (partition_count = 0; partition_count < ptns_to_read;) { // SPEC error
1419 if ((ret = setup_classifs(vc, vr, do_not_decode, ch_used, partition_count, ptns_to_read)) < 0)
1422 for (i = 0; (i < c_p_c) && (partition_count < ptns_to_read); ++i) {
1423 for (j_times_ptns_to_read = 0, j = 0; j < ch_used; ++j) {
1426 if (!do_not_decode[j]) {
1427 unsigned vqclass = classifs[j_times_ptns_to_read + partition_count];
1428 int vqbook = vr->books[vqclass][pass];
1430 if (vqbook >= 0 && vc->codebooks[vqbook].codevectors) {
1432 unsigned dim = vc->codebooks[vqbook].dimensions;
1433 unsigned step = FASTDIV(vr->partition_size << 1, dim << 1);
1434 vorbis_codebook codebook = vc->codebooks[vqbook];
1438 voffs = voffset+j*vlen;
1439 for (k = 0; k < step; ++k) {
1440 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1441 for (l = 0; l < dim; ++l)
1442 vec[voffs + k + l * step] += codebook.codevectors[coffs + l];
1444 } else if (vr_type == 1) {
1445 voffs = voffset + j * vlen;
1446 for (k = 0; k < step; ++k) {
1447 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1448 for (l = 0; l < dim; ++l, ++voffs) {
1449 vec[voffs]+=codebook.codevectors[coffs+l];
1451 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d \n",
1452 pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1455 } else if (vr_type == 2 && ch == 2 && (voffset & 1) == 0 && (dim & 1) == 0) { // most frequent case optimized
1456 voffs = voffset >> 1;
1459 for (k = 0; k < step; ++k) {
1460 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1461 vec[voffs + k ] += codebook.codevectors[coffs ];
1462 vec[voffs + k + vlen] += codebook.codevectors[coffs + 1];
1464 } else if (dim == 4) {
1465 for (k = 0; k < step; ++k, voffs += 2) {
1466 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1467 vec[voffs ] += codebook.codevectors[coffs ];
1468 vec[voffs + 1 ] += codebook.codevectors[coffs + 2];
1469 vec[voffs + vlen ] += codebook.codevectors[coffs + 1];
1470 vec[voffs + vlen + 1] += codebook.codevectors[coffs + 3];
1473 for (k = 0; k < step; ++k) {
1474 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1475 for (l = 0; l < dim; l += 2, voffs++) {
1476 vec[voffs ] += codebook.codevectors[coffs + l ];
1477 vec[voffs + vlen] += codebook.codevectors[coffs + l + 1];
1479 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1480 pass, voffset / ch + (voffs % ch) * vlen,
1481 vec[voffset / ch + (voffs % ch) * vlen],
1482 codebook.codevectors[coffs + l], coffs, l);
1486 } else if (vr_type == 2) {
1487 unsigned voffs_div = FASTDIV(voffset << 1, ch <<1);
1488 unsigned voffs_mod = voffset - voffs_div * ch;
1490 for (k = 0; k < step; ++k) {
1491 coffs = get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1492 for (l = 0; l < dim; ++l) {
1493 vec[voffs_div + voffs_mod * vlen] +=
1494 codebook.codevectors[coffs + l];
1496 av_dlog(NULL, " pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n",
1497 pass, voffs_div + voffs_mod * vlen,
1498 vec[voffs_div + voffs_mod * vlen],
1499 codebook.codevectors[coffs + l], coffs, l);
1501 if (++voffs_mod == ch) {
1510 j_times_ptns_to_read += ptns_to_read;
1513 voffset += vr->partition_size;
1516 if (libvorbis_bug && !pass) {
1517 for (j = 0; j < ch_used; ++j) {
1518 if (!do_not_decode[j]) {
1519 get_vlc2(&vc->gb, vc->codebooks[vr->classbook].vlc.table,
1520 vc->codebooks[vr->classbook].nb_bits, 3);
1528 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1530 uint8_t *do_not_decode,
1531 float *vec, unsigned vlen,
1535 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 2);
1536 else if (vr->type == 1)
1537 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 1);
1538 else if (vr->type == 0)
1539 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, ch_left, 0);
1541 av_log(vc->avctx, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1542 return AVERROR_INVALIDDATA;
1546 void ff_vorbis_inverse_coupling(float *mag, float *ang, intptr_t blocksize)
1549 for (i = 0; i < blocksize; i++) {
1552 ang[i] = mag[i] - ang[i];
1554 float temp = ang[i];
1562 float temp = ang[i];
1570 // Decode the audio packet using the functions above
1572 static int vorbis_parse_audio_packet(vorbis_context *vc, float **floor_ptr)
1574 GetBitContext *gb = &vc->gb;
1576 int previous_window = vc->previous_window;
1577 unsigned mode_number, blockflag, blocksize;
1579 uint8_t no_residue[255];
1580 uint8_t do_not_decode[255];
1581 vorbis_mapping *mapping;
1582 float *ch_res_ptr = vc->channel_residues;
1583 uint8_t res_chan[255];
1584 unsigned res_num = 0;
1586 unsigned ch_left = vc->audio_channels;
1589 if (get_bits1(gb)) {
1590 av_log(vc->avctx, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1591 return AVERROR_INVALIDDATA; // packet type not audio
1594 if (vc->mode_count == 1) {
1597 GET_VALIDATED_INDEX(mode_number, ilog(vc->mode_count-1), vc->mode_count)
1599 vc->mode_number = mode_number;
1600 mapping = &vc->mappings[vc->modes[mode_number].mapping];
1602 av_dlog(NULL, " Mode number: %u , mapping: %d , blocktype %d\n", mode_number,
1603 vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1605 blockflag = vc->modes[mode_number].blockflag;
1606 blocksize = vc->blocksize[blockflag];
1607 vlen = blocksize / 2;
1609 int code = get_bits(gb, 2);
1610 if (previous_window < 0)
1611 previous_window = code>>1;
1612 } else if (previous_window < 0)
1613 previous_window = 0;
1615 memset(ch_res_ptr, 0, sizeof(float) * vc->audio_channels * vlen); //FIXME can this be removed ?
1616 for (i = 0; i < vc->audio_channels; ++i)
1617 memset(floor_ptr[i], 0, vlen * sizeof(floor_ptr[0][0])); //FIXME can this be removed ?
1621 for (i = 0; i < vc->audio_channels; ++i) {
1622 vorbis_floor *floor;
1624 if (mapping->submaps > 1) {
1625 floor = &vc->floors[mapping->submap_floor[mapping->mux[i]]];
1627 floor = &vc->floors[mapping->submap_floor[0]];
1630 ret = floor->decode(vc, &floor->data, floor_ptr[i]);
1633 av_log(vc->avctx, AV_LOG_ERROR, "Invalid codebook in vorbis_floor_decode.\n");
1634 return AVERROR_INVALIDDATA;
1636 no_residue[i] = ret;
1639 // Nonzero vector propagate
1641 for (i = mapping->coupling_steps - 1; i >= 0; --i) {
1642 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1643 no_residue[mapping->magnitude[i]] = 0;
1644 no_residue[mapping->angle[i]] = 0;
1650 for (i = 0; i < mapping->submaps; ++i) {
1651 vorbis_residue *residue;
1655 for (j = 0; j < vc->audio_channels; ++j) {
1656 if ((mapping->submaps == 1) || (i == mapping->mux[j])) {
1657 res_chan[j] = res_num;
1658 if (no_residue[j]) {
1659 do_not_decode[ch] = 1;
1661 do_not_decode[ch] = 0;
1667 residue = &vc->residues[mapping->submap_residue[i]];
1669 av_log(vc->avctx, AV_LOG_ERROR, "Too many channels in vorbis_floor_decode.\n");
1670 return AVERROR_INVALIDDATA;
1673 ret = vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, vlen, ch_left);
1678 ch_res_ptr += ch * vlen;
1683 return AVERROR_INVALIDDATA;
1687 for (i = mapping->coupling_steps - 1; i >= 0; --i) { //warning: i has to be signed
1690 mag = vc->channel_residues+res_chan[mapping->magnitude[i]] * blocksize / 2;
1691 ang = vc->channel_residues+res_chan[mapping->angle[i]] * blocksize / 2;
1692 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize / 2);
1697 mdct = &vc->mdct[blockflag];
1699 for (j = vc->audio_channels-1;j >= 0; j--) {
1700 ch_res_ptr = vc->channel_residues + res_chan[j] * blocksize / 2;
1701 vc->fdsp->vector_fmul(floor_ptr[j], floor_ptr[j], ch_res_ptr, blocksize / 2);
1702 mdct->imdct_half(mdct, ch_res_ptr, floor_ptr[j]);
1705 // Overlap/add, save data for next overlapping
1707 retlen = (blocksize + vc->blocksize[previous_window]) / 4;
1708 for (j = 0; j < vc->audio_channels; j++) {
1709 unsigned bs0 = vc->blocksize[0];
1710 unsigned bs1 = vc->blocksize[1];
1711 float *residue = vc->channel_residues + res_chan[j] * blocksize / 2;
1712 float *saved = vc->saved + j * bs1 / 4;
1713 float *ret = floor_ptr[j];
1714 float *buf = residue;
1715 const float *win = vc->win[blockflag & previous_window];
1717 if (blockflag == previous_window) {
1718 vc->fdsp->vector_fmul_window(ret, saved, buf, win, blocksize / 4);
1719 } else if (blockflag > previous_window) {
1720 vc->fdsp->vector_fmul_window(ret, saved, buf, win, bs0 / 4);
1721 memcpy(ret+bs0/2, buf+bs0/4, ((bs1-bs0)/4) * sizeof(float));
1723 memcpy(ret, saved, ((bs1 - bs0) / 4) * sizeof(float));
1724 vc->fdsp->vector_fmul_window(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4);
1726 memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(float));
1729 vc->previous_window = blockflag;
1733 // Return the decoded audio packet through the standard api
1735 static int vorbis_decode_frame(AVCodecContext *avctx, void *data,
1736 int *got_frame_ptr, AVPacket *avpkt)
1738 const uint8_t *buf = avpkt->data;
1739 int buf_size = avpkt->size;
1740 vorbis_context *vc = avctx->priv_data;
1741 AVFrame *frame = data;
1742 GetBitContext *gb = &vc->gb;
1743 float *channel_ptrs[255];
1746 av_dlog(NULL, "packet length %d \n", buf_size);
1748 if (*buf == 1 && buf_size > 7) {
1749 init_get_bits(gb, buf+1, buf_size*8 - 8);
1751 if ((ret = vorbis_parse_id_hdr(vc))) {
1752 av_log(avctx, AV_LOG_ERROR, "Id header corrupt.\n");
1757 if (vc->audio_channels > 8)
1758 avctx->channel_layout = 0;
1760 avctx->channel_layout = ff_vorbis_channel_layouts[vc->audio_channels - 1];
1762 avctx->channels = vc->audio_channels;
1763 avctx->sample_rate = vc->audio_samplerate;
1767 if (*buf == 3 && buf_size > 7) {
1768 av_log(avctx, AV_LOG_DEBUG, "Ignoring comment header\n");
1772 if (*buf == 5 && buf_size > 7 && vc->channel_residues && !vc->modes) {
1773 init_get_bits(gb, buf+1, buf_size*8 - 8);
1774 if ((ret = vorbis_parse_setup_hdr(vc))) {
1775 av_log(avctx, AV_LOG_ERROR, "Setup header corrupt.\n");
1782 if (!vc->channel_residues || !vc->modes) {
1783 av_log(avctx, AV_LOG_ERROR, "Data packet before valid headers\n");
1784 return AVERROR_INVALIDDATA;
1787 /* get output buffer */
1788 frame->nb_samples = vc->blocksize[1] / 2;
1789 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1792 if (vc->audio_channels > 8) {
1793 for (i = 0; i < vc->audio_channels; i++)
1794 channel_ptrs[i] = (float *)frame->extended_data[i];
1796 for (i = 0; i < vc->audio_channels; i++) {
1797 int ch = ff_vorbis_channel_layout_offsets[vc->audio_channels - 1][i];
1798 channel_ptrs[ch] = (float *)frame->extended_data[i];
1802 init_get_bits(gb, buf, buf_size*8);
1804 if ((len = vorbis_parse_audio_packet(vc, channel_ptrs)) <= 0)
1807 if (!vc->first_frame) {
1808 vc->first_frame = 1;
1810 av_frame_unref(frame);
1814 av_dlog(NULL, "parsed %d bytes %d bits, returned %d samples (*ch*bits) \n",
1815 get_bits_count(gb) / 8, get_bits_count(gb) % 8, len);
1817 frame->nb_samples = len;
1825 static av_cold int vorbis_decode_close(AVCodecContext *avctx)
1827 vorbis_context *vc = avctx->priv_data;
1834 static av_cold void vorbis_decode_flush(AVCodecContext *avctx)
1836 vorbis_context *vc = avctx->priv_data;
1839 memset(vc->saved, 0, (vc->blocksize[1] / 4) * vc->audio_channels *
1840 sizeof(*vc->saved));
1842 vc->previous_window = -1;
1843 vc->first_frame = 0;
1846 AVCodec ff_vorbis_decoder = {
1848 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),
1849 .type = AVMEDIA_TYPE_AUDIO,
1850 .id = AV_CODEC_ID_VORBIS,
1851 .priv_data_size = sizeof(vorbis_context),
1852 .init = vorbis_decode_init,
1853 .close = vorbis_decode_close,
1854 .decode = vorbis_decode_frame,
1855 .flush = vorbis_decode_flush,
1856 .capabilities = CODEC_CAP_DR1,
1857 .channel_layouts = ff_vorbis_channel_layouts,
1858 .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_FLTP,
1859 AV_SAMPLE_FMT_NONE },