2 * @file libavcodec/vorbis_dec.c
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
25 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
29 #define ALT_BITSTREAM_READER_LE
39 #define V_MAX_VLCS (1<<16)
40 #define V_MAX_PARTITIONS (1<<20)
50 uint_fast8_t dimensions;
51 uint_fast8_t lookup_type;
52 uint_fast8_t maxdepth;
58 typedef union vorbis_floor_u vorbis_floor_data;
59 typedef struct vorbis_floor0_s vorbis_floor0;
60 typedef struct vorbis_floor1_s vorbis_floor1;
61 struct vorbis_context_s;
63 uint_fast8_t (* vorbis_floor_decode_func)
64 (struct vorbis_context_s *, vorbis_floor_data *, float *);
66 uint_fast8_t floor_type;
67 vorbis_floor_decode_func decode;
68 union vorbis_floor_u {
69 struct vorbis_floor0_s {
72 uint_fast16_t bark_map_size;
73 int_fast32_t * map[2];
74 uint_fast32_t map_size[2];
75 uint_fast8_t amplitude_bits;
76 uint_fast8_t amplitude_offset;
77 uint_fast8_t num_books;
78 uint_fast8_t * book_list;
81 struct vorbis_floor1_s {
82 uint_fast8_t partitions;
83 uint_fast8_t maximum_class;
84 uint_fast8_t partition_class[32];
85 uint_fast8_t class_dimensions[16];
86 uint_fast8_t class_subclasses[16];
87 uint_fast8_t class_masterbook[16];
88 int_fast16_t subclass_books[16][8];
89 uint_fast8_t multiplier;
90 uint_fast16_t x_list_dim;
91 vorbis_floor1_entry * list;
100 uint_fast32_t partition_size;
101 uint_fast8_t classifications;
102 uint_fast8_t classbook;
103 int_fast16_t books[64][8];
104 uint_fast8_t maxpass;
108 uint_fast8_t submaps;
109 uint_fast16_t coupling_steps;
110 uint_fast8_t *magnitude;
113 uint_fast8_t submap_floor[16];
114 uint_fast8_t submap_residue[16];
118 uint_fast8_t blockflag;
119 uint_fast16_t windowtype;
120 uint_fast16_t transformtype;
121 uint_fast8_t mapping;
124 typedef struct vorbis_context_s {
125 AVCodecContext *avccontext;
130 uint_fast8_t first_frame;
131 uint_fast32_t version;
132 uint_fast8_t audio_channels;
133 uint_fast32_t audio_samplerate;
134 uint_fast32_t bitrate_maximum;
135 uint_fast32_t bitrate_nominal;
136 uint_fast32_t bitrate_minimum;
137 uint_fast32_t blocksize[2];
138 const float * win[2];
139 uint_fast16_t codebook_count;
140 vorbis_codebook *codebooks;
141 uint_fast8_t floor_count;
142 vorbis_floor *floors;
143 uint_fast8_t residue_count;
144 vorbis_residue *residues;
145 uint_fast8_t mapping_count;
146 vorbis_mapping *mappings;
147 uint_fast8_t mode_count;
149 uint_fast8_t mode_number; // mode number for the current packet
150 uint_fast8_t previous_window;
151 float *channel_residues;
152 float *channel_floors;
154 uint_fast32_t add_bias; // for float->int conversion
155 uint_fast32_t exp_bias;
158 /* Helper functions */
161 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
163 static float vorbisfloat2float(uint_fast32_t val)
165 double mant=val&0x1fffff;
166 long exp=(val&0x7fe00000L)>>21;
169 return ldexp(mant, exp - 20 - 768);
173 // Free all allocated memory -----------------------------------------
175 static void vorbis_free(vorbis_context *vc)
179 av_freep(&vc->channel_residues);
180 av_freep(&vc->channel_floors);
181 av_freep(&vc->saved);
183 av_freep(&vc->residues);
184 av_freep(&vc->modes);
186 ff_mdct_end(&vc->mdct[0]);
187 ff_mdct_end(&vc->mdct[1]);
189 for(i=0;i<vc->codebook_count;++i) {
190 av_free(vc->codebooks[i].codevectors);
191 free_vlc(&vc->codebooks[i].vlc);
193 av_freep(&vc->codebooks);
195 for(i=0;i<vc->floor_count;++i) {
196 if(vc->floors[i].floor_type==0) {
197 av_free(vc->floors[i].data.t0.map[0]);
198 av_free(vc->floors[i].data.t0.map[1]);
199 av_free(vc->floors[i].data.t0.book_list);
200 av_free(vc->floors[i].data.t0.lsp);
202 av_free(vc->floors[i].data.t1.list);
205 av_freep(&vc->floors);
207 for(i=0;i<vc->mapping_count;++i) {
208 av_free(vc->mappings[i].magnitude);
209 av_free(vc->mappings[i].angle);
210 av_free(vc->mappings[i].mux);
212 av_freep(&vc->mappings);
215 // Parse setup header -------------------------------------------------
217 // Process codebooks part
219 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc)
222 uint8_t *tmp_vlc_bits;
223 uint32_t *tmp_vlc_codes;
224 GetBitContext *gb=&vc->gb;
226 vc->codebook_count=get_bits(gb,8)+1;
228 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
230 vc->codebooks=av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
231 tmp_vlc_bits =av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
232 tmp_vlc_codes=av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
234 for(cb=0;cb<vc->codebook_count;++cb) {
235 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
236 uint_fast8_t ordered;
237 uint_fast32_t t, used_entries=0;
238 uint_fast32_t entries;
240 AV_DEBUG(" %d. Codebook \n", cb);
242 if (get_bits(gb, 24)!=0x564342) {
243 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
247 codebook_setup->dimensions=get_bits(gb, 16);
248 if (codebook_setup->dimensions>16||codebook_setup->dimensions==0) {
249 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is invalid (%d). \n", cb, codebook_setup->dimensions);
252 entries=get_bits(gb, 24);
253 if (entries>V_MAX_VLCS) {
254 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
258 ordered=get_bits1(gb);
260 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
265 uint_fast8_t sparse=get_bits1(gb);
267 AV_DEBUG(" not ordered \n");
270 AV_DEBUG(" sparse \n");
273 for(ce=0;ce<entries;++ce) {
276 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
282 AV_DEBUG(" not sparse \n");
284 used_entries=entries;
285 for(ce=0;ce<entries;++ce)
286 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
289 uint_fast16_t current_entry=0;
290 uint_fast8_t current_length=get_bits(gb, 5)+1;
292 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
294 used_entries=entries;
295 for(;current_entry<used_entries && current_length <= 32;++current_length) {
296 uint_fast16_t i, number;
298 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
300 number=get_bits(gb, ilog(entries - current_entry));
302 AV_DEBUG(" number: %d \n", number);
304 for(i=current_entry;i<number+current_entry;++i)
306 tmp_vlc_bits[i]=current_length;
308 current_entry+=number;
310 if (current_entry>used_entries) {
311 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
316 codebook_setup->lookup_type=get_bits(gb, 4);
318 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
320 // If the codebook is used for (inverse) VQ, calculate codevectors.
322 if (codebook_setup->lookup_type==1) {
323 uint_fast16_t i, j, k;
324 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
325 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
327 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
328 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
329 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
330 uint_fast8_t codebook_sequence_p=get_bits1(gb);
332 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
333 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
335 for(i=0;i<codebook_lookup_values;++i) {
336 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
338 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
339 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
342 // Weed out unused vlcs and build codevector vector
343 codebook_setup->codevectors=used_entries ? av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float)) : NULL;
344 for(j=0, i=0;i<entries;++i) {
345 uint_fast8_t dim=codebook_setup->dimensions;
347 if (tmp_vlc_bits[i]) {
349 uint_fast32_t lookup_offset=i;
352 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
356 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
357 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
358 if (codebook_sequence_p)
359 last=codebook_setup->codevectors[j*dim+k];
360 lookup_offset/=codebook_lookup_values;
362 tmp_vlc_bits[j]=tmp_vlc_bits[i];
365 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
367 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
368 av_log(vc->avccontext, AV_LOG_INFO, "\n");
374 if (j!=used_entries) {
375 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
378 entries=used_entries;
379 } else if (codebook_setup->lookup_type>=2) {
380 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
384 // Initialize VLC table
385 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
386 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
389 codebook_setup->maxdepth=0;
390 for(t=0;t<entries;++t)
391 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth)
392 codebook_setup->maxdepth=tmp_vlc_bits[t];
394 if(codebook_setup->maxdepth > 3*V_NB_BITS)
395 codebook_setup->nb_bits=V_NB_BITS2;
397 codebook_setup->nb_bits=V_NB_BITS;
399 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
401 if (init_vlc(&codebook_setup->vlc, codebook_setup->nb_bits, entries, tmp_vlc_bits, sizeof(*tmp_vlc_bits), sizeof(*tmp_vlc_bits), tmp_vlc_codes, sizeof(*tmp_vlc_codes), sizeof(*tmp_vlc_codes), INIT_VLC_LE)) {
402 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
407 av_free(tmp_vlc_bits);
408 av_free(tmp_vlc_codes);
413 av_free(tmp_vlc_bits);
414 av_free(tmp_vlc_codes);
418 // Process time domain transforms part (unused in Vorbis I)
420 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc)
422 GetBitContext *gb=&vc->gb;
424 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
426 for(i=0;i<vorbis_time_count;++i) {
427 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
429 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
431 if (vorbis_tdtransform) {
432 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
439 // Process floors part
441 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
442 vorbis_floor_data *vfu, float *vec);
443 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
444 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
445 vorbis_floor_data *vfu, float *vec);
446 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc)
448 GetBitContext *gb=&vc->gb;
451 vc->floor_count=get_bits(gb, 6)+1;
453 vc->floors=av_mallocz(vc->floor_count * sizeof(vorbis_floor));
455 for (i=0;i<vc->floor_count;++i) {
456 vorbis_floor *floor_setup=&vc->floors[i];
458 floor_setup->floor_type=get_bits(gb, 16);
460 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
462 if (floor_setup->floor_type==1) {
463 uint_fast8_t maximum_class=0;
464 uint_fast8_t rangebits;
465 uint_fast16_t floor1_values=2;
467 floor_setup->decode=vorbis_floor1_decode;
469 floor_setup->data.t1.partitions=get_bits(gb, 5);
471 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
473 for(j=0;j<floor_setup->data.t1.partitions;++j) {
474 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
475 if (floor_setup->data.t1.partition_class[j]>maximum_class)
476 maximum_class=floor_setup->data.t1.partition_class[j];
478 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
482 AV_DEBUG(" maximum class %d \n", maximum_class);
484 floor_setup->data.t1.maximum_class=maximum_class;
486 for(j=0;j<=maximum_class;++j) {
487 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
488 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
490 AV_DEBUG(" %d floor %d class dim: %d subclasses %d \n", i, j, floor_setup->data.t1.class_dimensions[j], floor_setup->data.t1.class_subclasses[j]);
492 if (floor_setup->data.t1.class_subclasses[j]) {
493 int bits=get_bits(gb, 8);
494 if (bits>=vc->codebook_count) {
495 av_log(vc->avccontext, AV_LOG_ERROR, "Masterbook index %d is out of range.\n", bits);
498 floor_setup->data.t1.class_masterbook[j]=bits;
500 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
503 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
504 int16_t bits=get_bits(gb, 8)-1;
505 if (bits!=-1 && bits>=vc->codebook_count) {
506 av_log(vc->avccontext, AV_LOG_ERROR, "Subclass book index %d is out of range.\n", bits);
509 floor_setup->data.t1.subclass_books[j][k]=bits;
511 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
515 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
516 floor_setup->data.t1.x_list_dim=2;
518 for(j=0;j<floor_setup->data.t1.partitions;++j)
519 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
521 floor_setup->data.t1.list=av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(vorbis_floor1_entry));
524 rangebits=get_bits(gb, 4);
525 floor_setup->data.t1.list[0].x = 0;
526 floor_setup->data.t1.list[1].x = (1<<rangebits);
528 for(j=0;j<floor_setup->data.t1.partitions;++j) {
529 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
530 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
532 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
536 // Precalculate order of x coordinates - needed for decode
537 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
538 } else if(floor_setup->floor_type==0) {
539 uint_fast8_t max_codebook_dim=0;
541 floor_setup->decode=vorbis_floor0_decode;
543 floor_setup->data.t0.order=get_bits(gb, 8);
544 floor_setup->data.t0.rate=get_bits(gb, 16);
545 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
546 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
547 /* zero would result in a div by zero later *
549 if (floor_setup->data.t0.amplitude_bits == 0) {
550 av_log(vc->avccontext, AV_LOG_ERROR,
551 "Floor 0 amplitude bits is 0.\n");
554 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
555 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
557 /* allocate mem for booklist */
558 floor_setup->data.t0.book_list=
559 av_malloc(floor_setup->data.t0.num_books);
560 if(!floor_setup->data.t0.book_list)
562 /* read book indexes */
565 uint_fast8_t book_idx;
566 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
567 book_idx=get_bits(gb, 8);
568 if (book_idx>=vc->codebook_count)
570 floor_setup->data.t0.book_list[idx]=book_idx;
571 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
572 max_codebook_dim=vc->codebooks[book_idx].dimensions;
578 /* allocate mem for lsp coefficients */
580 /* codebook dim is for padding if codebook dim doesn't *
581 * divide order+1 then we need to read more data */
582 floor_setup->data.t0.lsp=
583 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
585 if(!floor_setup->data.t0.lsp)
589 #ifdef V_DEBUG /* debug output parsed headers */
590 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
591 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
592 AV_DEBUG("floor0 bark map size: %u\n",
593 floor_setup->data.t0.bark_map_size);
594 AV_DEBUG("floor0 amplitude bits: %u\n",
595 floor_setup->data.t0.amplitude_bits);
596 AV_DEBUG("floor0 amplitude offset: %u\n",
597 floor_setup->data.t0.amplitude_offset);
598 AV_DEBUG("floor0 number of books: %u\n",
599 floor_setup->data.t0.num_books);
600 AV_DEBUG("floor0 book list pointer: %p\n",
601 floor_setup->data.t0.book_list);
604 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
605 AV_DEBUG( " Book %d: %u\n",
607 floor_setup->data.t0.book_list[idx] );
612 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
619 // Process residues part
621 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc)
623 GetBitContext *gb=&vc->gb;
624 uint_fast8_t i, j, k;
626 vc->residue_count=get_bits(gb, 6)+1;
627 vc->residues=av_mallocz(vc->residue_count * sizeof(vorbis_residue));
629 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
631 for(i=0;i<vc->residue_count;++i) {
632 vorbis_residue *res_setup=&vc->residues[i];
633 uint_fast8_t cascade[64];
634 uint_fast8_t high_bits;
635 uint_fast8_t low_bits;
637 res_setup->type=get_bits(gb, 16);
639 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
641 res_setup->begin=get_bits(gb, 24);
642 res_setup->end=get_bits(gb, 24);
643 res_setup->partition_size=get_bits(gb, 24)+1;
644 /* Validations to prevent a buffer overflow later. */
645 if (res_setup->begin>res_setup->end
646 || res_setup->end>vc->blocksize[1]/(res_setup->type==2?1:2)
647 || (res_setup->end-res_setup->begin)/res_setup->partition_size>V_MAX_PARTITIONS) {
648 av_log(vc->avccontext, AV_LOG_ERROR, "partition out of bounds: type, begin, end, size, blocksize: %"PRIdFAST16", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32", %"PRIdFAST32"\n", res_setup->type, res_setup->begin, res_setup->end, res_setup->partition_size, vc->blocksize[1]/2);
652 res_setup->classifications=get_bits(gb, 6)+1;
653 res_setup->classbook=get_bits(gb, 8);
654 if (res_setup->classbook>=vc->codebook_count) {
655 av_log(vc->avccontext, AV_LOG_ERROR, "classbook value %d out of range. \n", res_setup->classbook);
659 AV_DEBUG(" begin %d end %d part.size %d classif.s %d classbook %d \n", res_setup->begin, res_setup->end, res_setup->partition_size,
660 res_setup->classifications, res_setup->classbook);
662 for(j=0;j<res_setup->classifications;++j) {
664 low_bits=get_bits(gb, 3);
666 high_bits=get_bits(gb, 5);
667 cascade[j]=(high_bits<<3)+low_bits;
669 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
672 res_setup->maxpass=0;
673 for(j=0;j<res_setup->classifications;++j) {
675 if (cascade[j]&(1<<k)) {
676 int bits=get_bits(gb, 8);
677 if (bits>=vc->codebook_count) {
678 av_log(vc->avccontext, AV_LOG_ERROR, "book value %d out of range. \n", bits);
681 res_setup->books[j][k]=bits;
683 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
685 if (k>res_setup->maxpass)
686 res_setup->maxpass=k;
688 res_setup->books[j][k]=-1;
696 // Process mappings part
698 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc)
700 GetBitContext *gb=&vc->gb;
703 vc->mapping_count=get_bits(gb, 6)+1;
704 vc->mappings=av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
706 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
708 for(i=0;i<vc->mapping_count;++i) {
709 vorbis_mapping *mapping_setup=&vc->mappings[i];
711 if (get_bits(gb, 16)) {
712 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
716 mapping_setup->submaps=get_bits(gb, 4)+1;
718 mapping_setup->submaps=1;
722 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
723 mapping_setup->magnitude=av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
724 mapping_setup->angle =av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
725 for(j=0;j<mapping_setup->coupling_steps;++j) {
726 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
727 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
728 if (mapping_setup->magnitude[j]>=vc->audio_channels) {
729 av_log(vc->avccontext, AV_LOG_ERROR, "magnitude channel %d out of range. \n", mapping_setup->magnitude[j]);
732 if (mapping_setup->angle[j]>=vc->audio_channels) {
733 av_log(vc->avccontext, AV_LOG_ERROR, "angle channel %d out of range. \n", mapping_setup->angle[j]);
738 mapping_setup->coupling_steps=0;
741 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
743 if(get_bits(gb, 2)) {
744 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
745 return -1; // following spec.
748 if (mapping_setup->submaps>1) {
749 mapping_setup->mux=av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
750 for(j=0;j<vc->audio_channels;++j)
751 mapping_setup->mux[j]=get_bits(gb, 4);
754 for(j=0;j<mapping_setup->submaps;++j) {
756 skip_bits(gb, 8); // FIXME check?
757 bits=get_bits(gb, 8);
758 if (bits>=vc->floor_count) {
759 av_log(vc->avccontext, AV_LOG_ERROR, "submap floor value %d out of range. \n", bits);
762 mapping_setup->submap_floor[j]=bits;
763 bits=get_bits(gb, 8);
764 if (bits>=vc->residue_count) {
765 av_log(vc->avccontext, AV_LOG_ERROR, "submap residue value %d out of range. \n", bits);
768 mapping_setup->submap_residue[j]=bits;
770 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
776 // Process modes part
778 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
780 vorbis_floor * floors=vc->floors;
783 int_fast8_t blockflag;
785 int_fast32_t n; //TODO: could theoretically be smaller?
787 for (blockflag=0;blockflag<2;++blockflag) {
788 n=vc->blocksize[blockflag]/2;
789 floors[floor_number].data.t0.map[blockflag]=
790 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
792 map=floors[floor_number].data.t0.map[blockflag];
793 vf=&floors[floor_number].data.t0;
795 for (idx=0; idx<n;++idx) {
796 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
797 ((vf->bark_map_size)/
798 BARK(vf->rate/2.0f )) );
799 if (vf->bark_map_size-1 < map[idx])
800 map[idx]=vf->bark_map_size-1;
803 vf->map_size[blockflag]=n;
807 for(idx=0;idx<=n;++idx) {
808 AV_DEBUG("floor0 map: map at pos %d is %d\n",
814 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc)
816 GetBitContext *gb=&vc->gb;
819 vc->mode_count=get_bits(gb, 6)+1;
820 vc->modes=av_mallocz(vc->mode_count * sizeof(vorbis_mode));
822 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
824 for(i=0;i<vc->mode_count;++i) {
825 vorbis_mode *mode_setup=&vc->modes[i];
827 mode_setup->blockflag=get_bits1(gb);
828 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
829 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
830 mode_setup->mapping=get_bits(gb, 8);
831 if (mode_setup->mapping>=vc->mapping_count) {
832 av_log(vc->avccontext, AV_LOG_ERROR, "mode mapping value %d out of range. \n", mode_setup->mapping);
836 AV_DEBUG(" %d mode: blockflag %d, windowtype %d, transformtype %d, mapping %d \n", i, mode_setup->blockflag, mode_setup->windowtype, mode_setup->transformtype, mode_setup->mapping);
841 // Process the whole setup header using the functions above
843 static int vorbis_parse_setup_hdr(vorbis_context *vc)
845 GetBitContext *gb=&vc->gb;
847 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
848 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
849 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
850 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
854 if (vorbis_parse_setup_hdr_codebooks(vc)) {
855 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
858 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
859 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
862 if (vorbis_parse_setup_hdr_floors(vc)) {
863 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
866 if (vorbis_parse_setup_hdr_residues(vc)) {
867 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
870 if (vorbis_parse_setup_hdr_mappings(vc)) {
871 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
874 if (vorbis_parse_setup_hdr_modes(vc)) {
875 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
878 if (!get_bits1(gb)) {
879 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
880 return -8; // framing flag bit unset error
886 // Process the identification header
888 static int vorbis_parse_id_hdr(vorbis_context *vc)
890 GetBitContext *gb=&vc->gb;
891 uint_fast8_t bl0, bl1;
893 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
894 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
895 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
900 vc->version=get_bits_long(gb, 32); //FIXME check 0
901 vc->audio_channels=get_bits(gb, 8);
902 if(vc->audio_channels <= 0){
903 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid number of channels\n");
906 vc->audio_samplerate=get_bits_long(gb, 32);
907 if(vc->audio_samplerate <= 0){
908 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid samplerate\n");
911 vc->bitrate_maximum=get_bits_long(gb, 32);
912 vc->bitrate_nominal=get_bits_long(gb, 32);
913 vc->bitrate_minimum=get_bits_long(gb, 32);
916 vc->blocksize[0]=(1<<bl0);
917 vc->blocksize[1]=(1<<bl1);
918 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
919 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
922 // output format int16
923 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
924 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
925 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
926 "output packets too large.\n");
929 vc->win[0]=ff_vorbis_vwin[bl0-6];
930 vc->win[1]=ff_vorbis_vwin[bl1-6];
932 if ((get_bits1(gb)) == 0) {
933 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
937 vc->channel_residues= av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
938 vc->channel_floors = av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
939 vc->saved = av_mallocz((vc->blocksize[1]/4)*vc->audio_channels * sizeof(float));
940 vc->previous_window=0;
942 ff_mdct_init(&vc->mdct[0], bl0, 1, vc->exp_bias ? -(1<<15) : -1.0);
943 ff_mdct_init(&vc->mdct[1], bl1, 1, vc->exp_bias ? -(1<<15) : -1.0);
945 AV_DEBUG(" vorbis version %d \n audio_channels %d \n audio_samplerate %d \n bitrate_max %d \n bitrate_nom %d \n bitrate_min %d \n blk_0 %d blk_1 %d \n ",
946 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
949 BLK=vc->blocksize[0];
950 for(i=0;i<BLK/2;++i) {
951 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)));
958 // Process the extradata using the functions above (identification header, setup header)
960 static av_cold int vorbis_decode_init(AVCodecContext *avccontext)
962 vorbis_context *vc = avccontext->priv_data ;
963 uint8_t *headers = avccontext->extradata;
964 int headers_len=avccontext->extradata_size;
965 uint8_t *header_start[3];
967 GetBitContext *gb = &(vc->gb);
970 vc->avccontext = avccontext;
971 dsputil_init(&vc->dsp, avccontext);
973 if(vc->dsp.float_to_int16_interleave == ff_float_to_int16_interleave_c) {
978 vc->exp_bias = 15<<23;
982 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
986 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
987 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
991 init_get_bits(gb, header_start[0], header_len[0]*8);
992 hdr_type=get_bits(gb, 8);
994 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
997 if (vorbis_parse_id_hdr(vc)) {
998 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1003 init_get_bits(gb, header_start[2], header_len[2]*8);
1004 hdr_type=get_bits(gb, 8);
1006 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1010 if (vorbis_parse_setup_hdr(vc)) {
1011 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1016 avccontext->channels = vc->audio_channels;
1017 avccontext->sample_rate = vc->audio_samplerate;
1018 avccontext->frame_size = FFMIN(vc->blocksize[0], vc->blocksize[1])>>2;
1019 avccontext->sample_fmt = SAMPLE_FMT_S16;
1024 // Decode audiopackets -------------------------------------------------
1026 // Read and decode floor
1028 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1029 vorbis_floor_data *vfu, float *vec)
1031 vorbis_floor0 * vf=&vfu->t0;
1032 float * lsp=vf->lsp;
1033 uint_fast32_t amplitude;
1034 uint_fast32_t book_idx;
1035 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1037 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1040 uint_fast16_t lsp_len = 0;
1042 vorbis_codebook codebook;
1044 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1045 if ( book_idx >= vf->num_books ) {
1046 av_log( vc->avccontext, AV_LOG_ERROR,
1047 "floor0 dec: booknumber too high!\n" );
1051 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1052 codebook=vc->codebooks[vf->book_list[book_idx]];
1054 while (lsp_len<vf->order) {
1057 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1058 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1059 /* read temp vector */
1060 vec_off=get_vlc2(&vc->gb,
1063 codebook.maxdepth ) *
1064 codebook.dimensions;
1065 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1066 /* copy each vector component and add last to it */
1067 for (idx=0; idx<codebook.dimensions; ++idx)
1068 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1069 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1071 lsp_len += codebook.dimensions;
1074 /* DEBUG: output lsp coeffs */
1077 for ( idx = 0; idx < lsp_len; ++idx )
1078 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1082 /* synthesize floor output vector */
1085 int order=vf->order;
1086 float wstep=M_PI/vf->bark_map_size;
1088 for(i=0;i<order;i++)
1089 lsp[i]=2.0f*cos(lsp[i]);
1091 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1092 vf->map_size, order, wstep);
1095 while(i<vf->map_size[blockflag]) {
1096 int j, iter_cond=vf->map[blockflag][i];
1099 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1101 /* similar part for the q and p products */
1102 for(j=0;j+1<order;j+=2) {
1103 q *= lsp[j] -two_cos_w;
1104 p *= lsp[j+1]-two_cos_w;
1106 if(j==order) { // even order
1107 p *= p*(2.0f-two_cos_w);
1108 q *= q*(2.0f+two_cos_w);
1109 } else { // odd order
1110 q *= two_cos_w-lsp[j]; // one more time for q
1112 /* final step and square */
1113 p *= p*(4.f-two_cos_w*two_cos_w);
1117 /* calculate linear floor value */
1120 ( (amplitude*vf->amplitude_offset)/
1121 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1122 - vf->amplitude_offset ) * .11512925f
1129 } while (vf->map[blockflag][i]==iter_cond);
1133 /* this channel is unused */
1137 AV_DEBUG(" Floor0 decoded\n");
1142 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
1143 vorbis_floor_data *vfu, float *vec)
1145 vorbis_floor1 * vf=&vfu->t1;
1146 GetBitContext *gb=&vc->gb;
1147 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1148 uint_fast16_t range=range_v[vf->multiplier-1];
1149 uint_fast16_t floor1_Y[vf->x_list_dim];
1150 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1151 int floor1_flag[vf->x_list_dim];
1152 uint_fast8_t class_;
1158 uint_fast16_t offset;
1160 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1161 int_fast16_t dy, err;
1164 if (!get_bits1(gb)) // silence
1167 // Read values (or differences) for the floor's points
1169 floor1_Y[0]=get_bits(gb, ilog(range-1));
1170 floor1_Y[1]=get_bits(gb, ilog(range-1));
1172 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1175 for(i=0;i<vf->partitions;++i) {
1176 class_=vf->partition_class[i];
1177 cdim=vf->class_dimensions[class_];
1178 cbits=vf->class_subclasses[class_];
1182 AV_DEBUG("Cbits %d \n", cbits);
1184 if (cbits) // this reads all subclasses for this partition's class
1185 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1186 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1188 for(j=0;j<cdim;++j) {
1189 book=vf->subclass_books[class_][cval & csub];
1191 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1195 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1196 vc->codebooks[book].nb_bits, 3);
1198 floor1_Y[offset+j]=0;
1201 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1206 // Amplitude calculation from the differences
1210 floor1_Y_final[0]=floor1_Y[0];
1211 floor1_Y_final[1]=floor1_Y[1];
1213 for(i=2;i<vf->x_list_dim;++i) {
1214 uint_fast16_t val, highroom, lowroom, room;
1215 uint_fast16_t high_neigh_offs;
1216 uint_fast16_t low_neigh_offs;
1218 low_neigh_offs=vf->list[i].low;
1219 high_neigh_offs=vf->list[i].high;
1220 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1221 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1223 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1224 off=(int16_t)err/(int16_t)adx;
1226 predicted=floor1_Y_final[low_neigh_offs]-off;
1228 predicted=floor1_Y_final[low_neigh_offs]+off;
1229 } // render_point end
1232 highroom=range-predicted;
1234 if (highroom < lowroom) {
1237 room=lowroom*2; // SPEC mispelling
1240 floor1_flag[low_neigh_offs]=1;
1241 floor1_flag[high_neigh_offs]=1;
1244 if (highroom > lowroom) {
1245 floor1_Y_final[i]=val-lowroom+predicted;
1247 floor1_Y_final[i]=predicted-val+highroom-1;
1251 floor1_Y_final[i]=predicted-(val+1)/2;
1253 floor1_Y_final[i]=predicted+val/2;
1258 floor1_Y_final[i]=predicted;
1261 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1264 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1266 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1268 AV_DEBUG(" Floor decoded\n");
1273 // Read and decode residue
1275 static av_always_inline int vorbis_residue_decode_internal(vorbis_context *vc,
1278 uint_fast8_t *do_not_decode,
1283 GetBitContext *gb=&vc->gb;
1284 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1285 uint_fast16_t n_to_read=vr->end-vr->begin;
1286 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1287 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1289 uint_fast8_t ch_used;
1295 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1296 if (do_not_decode[0])
1303 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1305 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1306 uint_fast16_t voffset;
1307 uint_fast16_t partition_count;
1308 uint_fast16_t j_times_ptns_to_read;
1311 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1313 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1314 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1315 if (!do_not_decode[j]) {
1316 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1317 vc->codebooks[vr->classbook].nb_bits, 3);
1319 AV_DEBUG("Classword: %d \n", temp);
1321 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1322 for(i=0;i<c_p_c;++i) {
1323 uint_fast32_t temp2;
1325 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1326 if (partition_count+c_p_c-1-i < ptns_to_read)
1327 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1331 j_times_ptns_to_read+=ptns_to_read;
1334 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1335 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1336 uint_fast16_t voffs;
1338 if (!do_not_decode[j]) {
1339 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1340 int_fast16_t vqbook=vr->books[vqclass][pass];
1342 if (vqbook>=0 && vc->codebooks[vqbook].codevectors) {
1343 uint_fast16_t coffs;
1344 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1345 uint_fast16_t step= dim==1 ? vr->partition_size
1346 : FASTDIV(vr->partition_size, dim);
1347 vorbis_codebook codebook= vc->codebooks[vqbook];
1351 voffs=voffset+j*vlen;
1352 for(k=0;k<step;++k) {
1353 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1355 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1357 } else if (vr_type==1) {
1358 voffs=voffset+j*vlen;
1359 for(k=0;k<step;++k) {
1360 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1361 for(l=0;l<dim;++l, ++voffs) {
1362 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1364 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1367 } else if (vr_type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1371 for(k=0;k<step;++k) {
1372 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1373 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1374 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1377 for(k=0;k<step;++k, voffs+=2) {
1378 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 4;
1379 vec[voffs ]+=codebook.codevectors[coffs ]; // FPMATH
1380 vec[voffs+1 ]+=codebook.codevectors[coffs+2]; // FPMATH
1381 vec[voffs+vlen ]+=codebook.codevectors[coffs+1]; // FPMATH
1382 vec[voffs+vlen+1]+=codebook.codevectors[coffs+3]; // FPMATH
1385 for(k=0;k<step;++k) {
1386 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1387 for(l=0;l<dim;l+=2, voffs++) {
1388 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1389 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1391 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
1395 } else if (vr_type==2) {
1398 for(k=0;k<step;++k) {
1399 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1400 for(l=0;l<dim;++l, ++voffs) {
1401 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1403 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d+%d \n", pass, voffset/ch+(voffs%ch)*vlen, vec[voffset/ch+(voffs%ch)*vlen], codebook.codevectors[coffs+l], coffs, l);
1409 j_times_ptns_to_read+=ptns_to_read;
1412 voffset+=vr->partition_size;
1419 static inline int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr,
1421 uint_fast8_t *do_not_decode,
1422 float *vec, uint_fast16_t vlen)
1425 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 2);
1426 else if (vr->type==1)
1427 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 1);
1428 else if (vr->type==0)
1429 return vorbis_residue_decode_internal(vc, vr, ch, do_not_decode, vec, vlen, 0);
1431 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1436 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1439 for(i=0; i<blocksize; i++) {
1442 ang[i]=mag[i]-ang[i];
1460 static void copy_normalize(float *dst, float *src, int len, int exp_bias,
1465 memcpy(dst, src, len * sizeof(float));
1467 for(i=0; i<len; i++)
1468 dst[i] = src[i] + add_bias;
1472 // Decode the audio packet using the functions above
1474 static int vorbis_parse_audio_packet(vorbis_context *vc)
1476 GetBitContext *gb=&vc->gb;
1478 uint_fast8_t previous_window=vc->previous_window;
1479 uint_fast8_t mode_number;
1480 uint_fast8_t blockflag;
1481 uint_fast16_t blocksize;
1483 uint_fast8_t no_residue[vc->audio_channels];
1484 uint_fast8_t do_not_decode[vc->audio_channels];
1485 vorbis_mapping *mapping;
1486 float *ch_res_ptr=vc->channel_residues;
1487 float *ch_floor_ptr=vc->channel_floors;
1488 uint_fast8_t res_chan[vc->audio_channels];
1489 uint_fast8_t res_num=0;
1490 int_fast16_t retlen=0;
1491 float fadd_bias = vc->add_bias;
1493 if (get_bits1(gb)) {
1494 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1495 return -1; // packet type not audio
1498 if (vc->mode_count==1) {
1501 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1503 if (mode_number>=vc->mode_count) {
1504 av_log(vc->avccontext, AV_LOG_ERROR, "mode number %d out of range.\n", mode_number);
1507 vc->mode_number=mode_number;
1508 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1510 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1512 blockflag=vc->modes[mode_number].blockflag;
1513 blocksize=vc->blocksize[blockflag];
1515 skip_bits(gb, 2); // previous_window, next_window
1517 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1518 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1522 for(i=0;i<vc->audio_channels;++i) {
1523 vorbis_floor *floor;
1524 if (mapping->submaps>1) {
1525 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1527 floor=&vc->floors[mapping->submap_floor[0]];
1530 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1531 ch_floor_ptr+=blocksize/2;
1534 // Nonzero vector propagate
1536 for(i=mapping->coupling_steps-1;i>=0;--i) {
1537 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1538 no_residue[mapping->magnitude[i]]=0;
1539 no_residue[mapping->angle[i]]=0;
1545 for(i=0;i<mapping->submaps;++i) {
1546 vorbis_residue *residue;
1549 for(j=0;j<vc->audio_channels;++j) {
1550 if ((mapping->submaps==1) || (i==mapping->mux[j])) {
1551 res_chan[j]=res_num;
1552 if (no_residue[j]) {
1553 do_not_decode[ch]=1;
1555 do_not_decode[ch]=0;
1561 residue=&vc->residues[mapping->submap_residue[i]];
1562 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1564 ch_res_ptr+=ch*blocksize/2;
1569 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1572 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1573 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1574 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1579 for(j=vc->audio_channels-1;j>=0;j--) {
1580 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1581 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1582 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1583 ff_imdct_half(&vc->mdct[blockflag], ch_res_ptr, ch_floor_ptr);
1586 // Overlap/add, save data for next overlapping FPMATH
1588 retlen = (blocksize + vc->blocksize[previous_window])/4;
1589 for(j=0;j<vc->audio_channels;j++) {
1590 uint_fast16_t bs0=vc->blocksize[0];
1591 uint_fast16_t bs1=vc->blocksize[1];
1592 float *residue=vc->channel_residues+res_chan[j]*blocksize/2;
1593 float *saved=vc->saved+j*bs1/4;
1594 float *ret=vc->channel_floors+j*retlen;
1596 const float *win=vc->win[blockflag&previous_window];
1598 if(blockflag == previous_window) {
1599 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, blocksize/4);
1600 } else if(blockflag > previous_window) {
1601 vc->dsp.vector_fmul_window(ret, saved, buf, win, fadd_bias, bs0/4);
1602 copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
1604 copy_normalize(ret, saved, (bs1-bs0)/4, vc->exp_bias, fadd_bias);
1605 vc->dsp.vector_fmul_window(ret+(bs1-bs0)/4, saved+(bs1-bs0)/4, buf, win, fadd_bias, bs0/4);
1607 memcpy(saved, buf+blocksize/4, blocksize/4*sizeof(float));
1610 vc->previous_window = blockflag;
1614 // Return the decoded audio packet through the standard api
1616 static int vorbis_decode_frame(AVCodecContext *avccontext,
1617 void *data, int *data_size,
1620 const uint8_t *buf = avpkt->data;
1621 int buf_size = avpkt->size;
1622 vorbis_context *vc = avccontext->priv_data ;
1623 GetBitContext *gb = &(vc->gb);
1624 const float *channel_ptrs[vc->audio_channels];
1632 AV_DEBUG("packet length %d \n", buf_size);
1634 init_get_bits(gb, buf, buf_size*8);
1636 len=vorbis_parse_audio_packet(vc);
1643 if (!vc->first_frame) {
1649 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1651 for(i=0; i<vc->audio_channels; i++)
1652 channel_ptrs[i] = vc->channel_floors+i*len;
1653 vc->dsp.float_to_int16_interleave(data, channel_ptrs, len, vc->audio_channels);
1654 *data_size=len*2*vc->audio_channels;
1661 static av_cold int vorbis_decode_close(AVCodecContext *avccontext)
1663 vorbis_context *vc = avccontext->priv_data;
1670 AVCodec vorbis_decoder = {
1674 sizeof(vorbis_context),
1677 vorbis_decode_close,
1678 vorbis_decode_frame,
1679 .long_name = NULL_IF_CONFIG_SMALL("Vorbis"),