4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
28 #define ALT_BITSTREAM_READER_LE
30 #include "bitstream.h"
37 #define V_MAX_VLCS (1<<16)
47 uint_fast8_t dimensions;
48 uint_fast8_t lookup_type;
49 uint_fast8_t maxdepth;
55 typedef union vorbis_floor_u vorbis_floor_data;
56 typedef struct vorbis_floor0_s vorbis_floor0;
57 typedef struct vorbis_floor1_s vorbis_floor1;
58 struct vorbis_context_s;
60 uint_fast8_t (* vorbis_floor_decode_func)
61 (struct vorbis_context_s *, vorbis_floor_data *, float *);
63 uint_fast8_t floor_type;
64 vorbis_floor_decode_func decode;
67 struct vorbis_floor0_s
71 uint_fast16_t bark_map_size;
72 int_fast32_t * map[2];
73 uint_fast32_t map_size[2];
74 uint_fast8_t amplitude_bits;
75 uint_fast8_t amplitude_offset;
76 uint_fast8_t num_books;
77 uint_fast8_t * book_list;
80 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 floor1_entry_t * 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 float *channel_residues;
151 float *channel_floors;
153 uint_fast16_t saved_start;
157 uint_fast32_t add_bias; // for float->int conversion
158 uint_fast32_t exp_bias;
161 /* Helper functions */
164 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
166 unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
167 unsigned int ret=0, i, j;
171 for(i=0,j=ret;i<n-1;i++) j*=ret;
177 static float vorbisfloat2float(uint_fast32_t val) {
178 double mant=val&0x1fffff;
179 long exp=(val&0x7fe00000L)>>21;
180 if (val&0x80000000) mant=-mant;
181 return(ldexp(mant, exp-20-768));
185 // Generate vlc codes from vorbis huffman code lengths
187 int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
188 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
189 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
192 uint_fast32_t code,p;
198 for(p=0;(bits[p]==0) && (p<num);++p);
200 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
205 for(i=0;i<bits[p];++i) {
206 exit_at_level[i+1]=1<<i;
210 av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
211 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
212 for(i=0;i<bits[p];++i) {
213 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
215 av_log(NULL, AV_LOG_INFO, "\n");
221 if (bits[p]==0) continue;
222 // find corresponding exit(node which the tree can grow further from)
223 for(i=bits[p];i>0;--i) {
224 if (exit_at_level[i]) break;
226 if (!i) return 1; // overspecified tree
227 code=exit_at_level[i];
229 // construct code (append 0s to end) and introduce new exits
230 for(j=i+1;j<=bits[p];++j) {
231 exit_at_level[j]=code+(1<<(j-1));
236 av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
237 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
238 for(i=0;i<bits[p];++i) {
239 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
241 av_log(NULL, AV_LOG_INFO, "\n");
246 //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
248 if (exit_at_level[p]) return 1;
253 void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
257 for (i = 2; i < values; i++) {
262 for (j = 2; j < i; j++) {
264 if (tmp < list[i].x) {
265 if (tmp > list[list[i].low].x) list[i].low = j;
267 if (tmp < list[list[i].high].x) list[i].high = j;
271 for (i = 0; i < values - 1; i++) {
273 for (j = i + 1; j < values; j++) {
274 if (list[list[i].sort].x > list[list[j].sort].x) {
275 int tmp = list[i].sort;
276 list[i].sort = list[j].sort;
283 // Free all allocated memory -----------------------------------------
285 static void vorbis_free(vorbis_context *vc) {
288 av_freep(&vc->channel_residues);
289 av_freep(&vc->channel_floors);
290 av_freep(&vc->saved);
293 av_freep(&vc->buf_tmp);
295 av_freep(&vc->residues);
296 av_freep(&vc->modes);
298 ff_mdct_end(&vc->mdct[0]);
299 ff_mdct_end(&vc->mdct[1]);
301 for(i=0;i<vc->codebook_count;++i) {
302 av_free(vc->codebooks[i].codevectors);
303 free_vlc(&vc->codebooks[i].vlc);
305 av_freep(&vc->codebooks);
307 for(i=0;i<vc->floor_count;++i) {
308 if(vc->floors[i].floor_type==0) {
309 av_free(vc->floors[i].data.t0.map[0]);
310 av_free(vc->floors[i].data.t0.map[1]);
311 av_free(vc->floors[i].data.t0.book_list);
312 av_free(vc->floors[i].data.t0.lsp);
315 av_free(vc->floors[i].data.t1.list);
318 av_freep(&vc->floors);
320 for(i=0;i<vc->mapping_count;++i) {
321 av_free(vc->mappings[i].magnitude);
322 av_free(vc->mappings[i].angle);
323 av_free(vc->mappings[i].mux);
325 av_freep(&vc->mappings);
328 av_freep(&vc->win[0]);
329 av_freep(&vc->win[1]);
333 // Parse setup header -------------------------------------------------
335 // Process codebooks part
337 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
339 uint8_t *tmp_vlc_bits;
340 uint32_t *tmp_vlc_codes;
341 GetBitContext *gb=&vc->gb;
343 vc->codebook_count=get_bits(gb,8)+1;
345 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
347 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
348 tmp_vlc_bits=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
349 tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
351 for(cb=0;cb<vc->codebook_count;++cb) {
352 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
353 uint_fast8_t ordered;
354 uint_fast32_t t, used_entries=0;
355 uint_fast32_t entries;
357 AV_DEBUG(" %d. Codebook \n", cb);
359 if (get_bits(gb, 24)!=0x564342) {
360 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
364 codebook_setup->dimensions=get_bits(gb, 16);
365 if (codebook_setup->dimensions>16) {
366 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
369 entries=get_bits(gb, 24);
370 if (entries>V_MAX_VLCS) {
371 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
375 ordered=get_bits1(gb);
377 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
382 uint_fast8_t sparse=get_bits1(gb);
384 AV_DEBUG(" not ordered \n");
387 AV_DEBUG(" sparse \n");
390 for(ce=0;ce<entries;++ce) {
393 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
396 else tmp_vlc_bits[ce]=0;
399 AV_DEBUG(" not sparse \n");
401 used_entries=entries;
402 for(ce=0;ce<entries;++ce) {
403 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
407 uint_fast16_t current_entry=0;
408 uint_fast8_t current_length=get_bits(gb, 5)+1;
410 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
412 used_entries=entries;
413 for(;current_entry<used_entries;++current_length) {
414 uint_fast16_t i, number;
416 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
418 number=get_bits(gb, ilog(entries - current_entry));
420 AV_DEBUG(" number: %d \n", number);
422 for(i=current_entry;i<number+current_entry;++i) {
423 if (i<used_entries) tmp_vlc_bits[i]=current_length;
426 current_entry+=number;
428 if (current_entry>used_entries) {
429 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
434 codebook_setup->lookup_type=get_bits(gb, 4);
436 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
438 // If the codebook is used for (inverse) VQ, calculate codevectors.
440 if (codebook_setup->lookup_type==1) {
441 uint_fast16_t i, j, k;
442 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
443 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
445 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
446 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
447 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
448 uint_fast8_t codebook_sequence_p=get_bits1(gb);
450 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
451 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
453 for(i=0;i<codebook_lookup_values;++i) {
454 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
456 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
457 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
460 // Weed out unused vlcs and build codevector vector
461 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
462 for(j=0, i=0;i<entries;++i) {
463 uint_fast8_t dim=codebook_setup->dimensions;
465 if (tmp_vlc_bits[i]) {
467 uint_fast32_t lookup_offset=i;
470 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
474 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
475 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
476 if (codebook_sequence_p) {
477 last=codebook_setup->codevectors[j*dim+k];
479 lookup_offset/=codebook_lookup_values;
481 tmp_vlc_bits[j]=tmp_vlc_bits[i];
484 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
486 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
488 av_log(vc->avccontext, AV_LOG_INFO, "\n");
494 if (j!=used_entries) {
495 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
498 entries=used_entries;
500 else if (codebook_setup->lookup_type>=2) {
501 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
505 // Initialize VLC table
506 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
507 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
510 codebook_setup->maxdepth=0;
511 for(t=0;t<entries;++t)
512 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
514 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
515 else codebook_setup->nb_bits=V_NB_BITS;
517 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
519 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)) {
520 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
525 av_free(tmp_vlc_bits);
526 av_free(tmp_vlc_codes);
531 av_free(tmp_vlc_bits);
532 av_free(tmp_vlc_codes);
536 // Process time domain transforms part (unused in Vorbis I)
538 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
539 GetBitContext *gb=&vc->gb;
541 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
543 for(i=0;i<vorbis_time_count;++i) {
544 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
546 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
548 if (vorbis_tdtransform) {
549 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
556 // Process floors part
558 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
559 vorbis_floor_data *vfu, float *vec);
560 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
561 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
562 vorbis_floor_data *vfu, float *vec);
563 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
564 GetBitContext *gb=&vc->gb;
567 vc->floor_count=get_bits(gb, 6)+1;
569 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
571 for (i=0;i<vc->floor_count;++i) {
572 vorbis_floor *floor_setup=&vc->floors[i];
574 floor_setup->floor_type=get_bits(gb, 16);
576 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
578 if (floor_setup->floor_type==1) {
579 uint_fast8_t maximum_class=0;
580 uint_fast8_t rangebits;
581 uint_fast16_t floor1_values=2;
583 floor_setup->decode=vorbis_floor1_decode;
585 floor_setup->data.t1.partitions=get_bits(gb, 5);
587 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
589 for(j=0;j<floor_setup->data.t1.partitions;++j) {
590 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
591 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
593 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
597 AV_DEBUG(" maximum class %d \n", maximum_class);
599 floor_setup->data.t1.maximum_class=maximum_class;
601 for(j=0;j<=maximum_class;++j) {
602 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
603 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
605 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]);
607 if (floor_setup->data.t1.class_subclasses[j]) {
608 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
610 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
613 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
614 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
616 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
620 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
621 floor_setup->data.t1.x_list_dim=2;
623 for(j=0;j<floor_setup->data.t1.partitions;++j) {
624 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
627 floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t));
630 rangebits=get_bits(gb, 4);
631 floor_setup->data.t1.list[0].x = 0;
632 floor_setup->data.t1.list[1].x = (1<<rangebits);
634 for(j=0;j<floor_setup->data.t1.partitions;++j) {
635 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
636 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
638 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
642 // Precalculate order of x coordinates - needed for decode
643 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
645 else if(floor_setup->floor_type==0) {
646 uint_fast8_t max_codebook_dim=0;
648 floor_setup->decode=vorbis_floor0_decode;
650 floor_setup->data.t0.order=get_bits(gb, 8);
651 floor_setup->data.t0.rate=get_bits(gb, 16);
652 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
653 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
654 /* zero would result in a div by zero later *
656 if (floor_setup->data.t0.amplitude_bits == 0) {
657 av_log(vc->avccontext, AV_LOG_ERROR,
658 "Floor 0 amplitude bits is 0.\n");
661 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
662 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
664 /* allocate mem for booklist */
665 floor_setup->data.t0.book_list=
666 av_malloc(floor_setup->data.t0.num_books);
667 if(!floor_setup->data.t0.book_list) { return 1; }
668 /* read book indexes */
671 uint_fast8_t book_idx;
672 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
673 book_idx=get_bits(gb, 8);
674 floor_setup->data.t0.book_list[idx]=book_idx;
675 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
676 max_codebook_dim=vc->codebooks[book_idx].dimensions;
678 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
685 /* allocate mem for lsp coefficients */
687 /* codebook dim is for padding if codebook dim doesn't *
688 * divide order+1 then we need to read more data */
689 floor_setup->data.t0.lsp=
690 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
692 if(!floor_setup->data.t0.lsp) { return 1; }
695 #ifdef V_DEBUG /* debug output parsed headers */
696 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
697 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
698 AV_DEBUG("floor0 bark map size: %u\n",
699 floor_setup->data.t0.bark_map_size);
700 AV_DEBUG("floor0 amplitude bits: %u\n",
701 floor_setup->data.t0.amplitude_bits);
702 AV_DEBUG("floor0 amplitude offset: %u\n",
703 floor_setup->data.t0.amplitude_offset);
704 AV_DEBUG("floor0 number of books: %u\n",
705 floor_setup->data.t0.num_books);
706 AV_DEBUG("floor0 book list pointer: %p\n",
707 floor_setup->data.t0.book_list);
710 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
711 AV_DEBUG( " Book %d: %u\n",
713 floor_setup->data.t0.book_list[idx] );
719 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
726 // Process residues part
728 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
729 GetBitContext *gb=&vc->gb;
730 uint_fast8_t i, j, k;
732 vc->residue_count=get_bits(gb, 6)+1;
733 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
735 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
737 for(i=0;i<vc->residue_count;++i) {
738 vorbis_residue *res_setup=&vc->residues[i];
739 uint_fast8_t cascade[64];
740 uint_fast8_t high_bits;
741 uint_fast8_t low_bits;
743 res_setup->type=get_bits(gb, 16);
745 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
747 res_setup->begin=get_bits(gb, 24);
748 res_setup->end=get_bits(gb, 24);
749 res_setup->partition_size=get_bits(gb, 24)+1;
750 res_setup->classifications=get_bits(gb, 6)+1;
751 res_setup->classbook=get_bits(gb, 8);
753 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,
754 res_setup->classifications, res_setup->classbook);
756 for(j=0;j<res_setup->classifications;++j) {
758 low_bits=get_bits(gb, 3);
760 high_bits=get_bits(gb, 5);
762 cascade[j]=(high_bits<<3)+low_bits;
764 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
767 res_setup->maxpass=0;
768 for(j=0;j<res_setup->classifications;++j) {
770 if (cascade[j]&(1<<k)) {
771 res_setup->books[j][k]=get_bits(gb, 8);
773 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
775 if (k>res_setup->maxpass) {
776 res_setup->maxpass=k;
779 res_setup->books[j][k]=-1;
787 // Process mappings part
789 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
790 GetBitContext *gb=&vc->gb;
793 vc->mapping_count=get_bits(gb, 6)+1;
794 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
796 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
798 for(i=0;i<vc->mapping_count;++i) {
799 vorbis_mapping *mapping_setup=&vc->mappings[i];
801 if (get_bits(gb, 16)) {
802 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
806 mapping_setup->submaps=get_bits(gb, 4)+1;
808 mapping_setup->submaps=1;
812 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
813 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
814 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
815 for(j=0;j<mapping_setup->coupling_steps;++j) {
816 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
817 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
818 // FIXME: sanity checks
821 mapping_setup->coupling_steps=0;
824 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
826 if(get_bits(gb, 2)) {
827 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
828 return 1; // following spec.
831 if (mapping_setup->submaps>1) {
832 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
833 for(j=0;j<vc->audio_channels;++j) {
834 mapping_setup->mux[j]=get_bits(gb, 4);
838 for(j=0;j<mapping_setup->submaps;++j) {
839 get_bits(gb, 8); // FIXME check?
840 mapping_setup->submap_floor[j]=get_bits(gb, 8);
841 mapping_setup->submap_residue[j]=get_bits(gb, 8);
843 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
849 // Process modes part
851 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
853 vorbis_floor * floors=vc->floors;
856 int_fast8_t blockflag;
858 int_fast32_t n; //TODO: could theoretically be smaller?
860 for (blockflag=0;blockflag<2;++blockflag)
862 n=vc->blocksize[blockflag]/2;
863 floors[floor_number].data.t0.map[blockflag]=
864 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
866 map=floors[floor_number].data.t0.map[blockflag];
867 vf=&floors[floor_number].data.t0;
869 for (idx=0; idx<n;++idx) {
870 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
871 ((vf->bark_map_size)/
872 BARK(vf->rate/2.0f )) );
873 if (vf->bark_map_size-1 < map[idx]) {
874 map[idx]=vf->bark_map_size-1;
878 vf->map_size[blockflag]=n;
882 for(idx=0;idx<=n;++idx) {
883 AV_DEBUG("floor0 map: map at pos %d is %d\n",
889 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
890 GetBitContext *gb=&vc->gb;
893 vc->mode_count=get_bits(gb, 6)+1;
894 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
896 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
898 for(i=0;i<vc->mode_count;++i) {
899 vorbis_mode *mode_setup=&vc->modes[i];
901 mode_setup->blockflag=get_bits(gb, 1);
902 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
903 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
904 mode_setup->mapping=get_bits(gb, 8); //FIXME check
906 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);
911 // Process the whole setup header using the functions above
913 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
914 GetBitContext *gb=&vc->gb;
916 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
917 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
918 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
919 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
923 if (vorbis_parse_setup_hdr_codebooks(vc)) {
924 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
927 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
928 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
931 if (vorbis_parse_setup_hdr_floors(vc)) {
932 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
935 if (vorbis_parse_setup_hdr_residues(vc)) {
936 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
939 if (vorbis_parse_setup_hdr_mappings(vc)) {
940 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
943 if (vorbis_parse_setup_hdr_modes(vc)) {
944 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
947 if (!get_bits1(gb)) {
948 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
949 return 8; // framing flag bit unset error
955 // Process the identification header
957 static int vorbis_parse_id_hdr(vorbis_context *vc){
958 GetBitContext *gb=&vc->gb;
959 uint_fast8_t bl0, bl1;
961 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
962 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
963 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
964 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
968 vc->version=get_bits_long(gb, 32); //FIXME check 0
969 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
970 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
971 vc->bitrate_maximum=get_bits_long(gb, 32);
972 vc->bitrate_nominal=get_bits_long(gb, 32);
973 vc->bitrate_minimum=get_bits_long(gb, 32);
976 vc->blocksize[0]=(1<<bl0);
977 vc->blocksize[1]=(1<<bl1);
978 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
979 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
982 // output format int16
983 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
984 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
985 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
986 "output packets too large.\n");
989 vc->win[0]=ff_vorbis_vwin[bl0-6];
990 vc->win[1]=ff_vorbis_vwin[bl1-6];
995 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
996 for(i=0; i<vc->blocksize[j]/2; i++)
997 win[i] = vc->win[j][i] * (1<<15);
1002 if ((get_bits1(gb)) == 0) {
1003 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1007 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1008 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1009 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1010 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1011 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1012 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1015 ff_mdct_init(&vc->mdct[0], bl0, 1);
1016 ff_mdct_init(&vc->mdct[1], bl1, 1);
1018 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 ",
1019 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1022 BLK=vc->blocksize[0];
1023 for(i=0;i<BLK/2;++i) {
1024 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)));
1031 // Process the extradata using the functions above (identification header, setup header)
1033 static int vorbis_decode_init(AVCodecContext *avccontext) {
1034 vorbis_context *vc = avccontext->priv_data ;
1035 uint8_t *headers = avccontext->extradata;
1036 int headers_len=avccontext->extradata_size;
1037 uint8_t *header_start[3];
1039 GetBitContext *gb = &(vc->gb);
1042 vc->avccontext = avccontext;
1043 dsputil_init(&vc->dsp, avccontext);
1045 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
1050 vc->exp_bias = 15<<23;
1054 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1058 if(headers[0] == 0 && headers[1] == 30) {
1059 for(i = 0; i < 3; i++){
1060 header_len[i] = *headers++ << 8;
1061 header_len[i] += *headers++;
1062 header_start[i] = headers;
1063 headers += header_len[i];
1065 } else if(headers[0] == 2) {
1066 for(j=1,i=0;i<2;++i, ++j) {
1068 while(j<headers_len && headers[j]==0xff) {
1069 header_len[i]+=0xff;
1072 if (j>=headers_len) {
1073 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1076 header_len[i]+=headers[j];
1078 header_len[2]=headers_len-header_len[0]-header_len[1]-j;
1080 header_start[0] = headers;
1081 header_start[1] = header_start[0] + header_len[0];
1082 header_start[2] = header_start[1] + header_len[1];
1084 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1088 init_get_bits(gb, header_start[0], header_len[0]*8);
1089 hdr_type=get_bits(gb, 8);
1091 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1094 if (vorbis_parse_id_hdr(vc)) {
1095 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1100 init_get_bits(gb, header_start[2], header_len[2]*8);
1101 hdr_type=get_bits(gb, 8);
1103 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1106 if (vorbis_parse_setup_hdr(vc)) {
1107 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1112 avccontext->channels = vc->audio_channels;
1113 avccontext->sample_rate = vc->audio_samplerate;
1118 // Decode audiopackets -------------------------------------------------
1120 // Read and decode floor
1122 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1123 vorbis_floor_data *vfu, float *vec) {
1124 vorbis_floor0 * vf=&vfu->t0;
1125 float * lsp=vf->lsp;
1126 uint_fast32_t amplitude;
1127 uint_fast32_t book_idx;
1128 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1130 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1133 uint_fast16_t lsp_len = 0;
1135 vorbis_codebook codebook;
1137 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1138 if ( book_idx >= vf->num_books ) {
1139 av_log( vc->avccontext, AV_LOG_ERROR,
1140 "floor0 dec: booknumber too high!\n" );
1143 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1144 codebook=vc->codebooks[vf->book_list[book_idx]];
1146 while (lsp_len<vf->order) {
1149 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1150 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1151 /* read temp vector */
1152 vec_off=get_vlc2(&vc->gb,
1155 codebook.maxdepth ) *
1156 codebook.dimensions;
1157 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1158 /* copy each vector component and add last to it */
1159 for (idx=0; idx<codebook.dimensions; ++idx) {
1160 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1162 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1164 lsp_len += codebook.dimensions;
1167 /* DEBUG: output lsp coeffs */
1170 for ( idx = 0; idx < lsp_len; ++idx )
1171 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1175 /* synthesize floor output vector */
1178 int order=vf->order;
1179 float wstep=M_PI/vf->bark_map_size;
1181 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1183 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1184 vf->map_size, order, wstep);
1187 while(i<vf->map_size[blockflag]) {
1188 int j, iter_cond=vf->map[blockflag][i];
1191 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1193 /* similar part for the q and p products */
1194 for(j=0;j<order;j+=2) {
1195 q *= lsp[j] -two_cos_w;
1196 p *= lsp[j+1]-two_cos_w;
1198 if(j==order) { // even order
1199 p *= p*(2.0f-two_cos_w);
1200 q *= q*(2.0f+two_cos_w);
1203 q *= two_cos_w-lsp[j]; // one more time for q
1205 /* final step and square */
1206 p *= p*(4.f-two_cos_w*two_cos_w);
1210 /* calculate linear floor value */
1213 ( (amplitude*vf->amplitude_offset)/
1214 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1215 - vf->amplitude_offset ) * .11512925f
1220 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1225 /* this channel is unused */
1229 AV_DEBUG(" Floor0 decoded\n");
1233 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1234 vorbis_floor1 * vf=&vfu->t1;
1235 GetBitContext *gb=&vc->gb;
1236 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1237 uint_fast16_t range=range_v[vf->multiplier-1];
1238 uint_fast16_t floor1_Y[vf->x_list_dim];
1239 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1240 uint_fast8_t floor1_flag[vf->x_list_dim];
1241 uint_fast8_t class_;
1247 uint_fast16_t offset;
1249 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1250 int_fast16_t dy, err;
1251 uint_fast16_t lx,hx, ly, hy=0;
1254 if (!get_bits1(gb)) return 1; // silence
1256 // Read values (or differences) for the floor's points
1258 floor1_Y[0]=get_bits(gb, ilog(range-1));
1259 floor1_Y[1]=get_bits(gb, ilog(range-1));
1261 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1264 for(i=0;i<vf->partitions;++i) {
1265 class_=vf->partition_class[i];
1266 cdim=vf->class_dimensions[class_];
1267 cbits=vf->class_subclasses[class_];
1271 AV_DEBUG("Cbits %d \n", cbits);
1273 if (cbits) { // this reads all subclasses for this partition's class
1274 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1275 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1278 for(j=0;j<cdim;++j) {
1279 book=vf->subclass_books[class_][cval & csub];
1281 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1285 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1286 vc->codebooks[book].nb_bits, 3);
1288 floor1_Y[offset+j]=0;
1291 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1296 // Amplitude calculation from the differences
1300 floor1_Y_final[0]=floor1_Y[0];
1301 floor1_Y_final[1]=floor1_Y[1];
1303 for(i=2;i<vf->x_list_dim;++i) {
1304 uint_fast16_t val, highroom, lowroom, room;
1305 uint_fast16_t high_neigh_offs;
1306 uint_fast16_t low_neigh_offs;
1308 low_neigh_offs=vf->list[i].low;
1309 high_neigh_offs=vf->list[i].high;
1310 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1311 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1313 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1314 off=(int16_t)err/(int16_t)adx;
1316 predicted=floor1_Y_final[low_neigh_offs]-off;
1318 predicted=floor1_Y_final[low_neigh_offs]+off;
1319 } // render_point end
1322 highroom=range-predicted;
1324 if (highroom < lowroom) {
1327 room=lowroom*2; // SPEC mispelling
1330 floor1_flag[low_neigh_offs]=1;
1331 floor1_flag[high_neigh_offs]=1;
1334 if (highroom > lowroom) {
1335 floor1_Y_final[i]=val-lowroom+predicted;
1337 floor1_Y_final[i]=predicted-val+highroom-1;
1341 floor1_Y_final[i]=predicted-(val+1)/2;
1343 floor1_Y_final[i]=predicted+val/2;
1348 floor1_Y_final[i]=predicted;
1351 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1354 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1358 ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
1360 vec[0]=ff_vorbis_floor1_inverse_db_table[ly];
1362 for(i=1;i<vf->x_list_dim;++i) {
1363 AV_DEBUG(" Looking at post %d \n", i);
1365 if (floor1_flag[vf->list[i].sort]) { // SPEC mispelled
1366 hy=floor1_Y_final[vf->list[i].sort]*vf->multiplier;
1367 hx=vf->list[vf->list[i].sort].x;
1369 render_line(lx, ly, hx, hy, vec, vc->blocksize[1]);
1376 if (hx<vf->list[1].x) {
1377 render_line(hx, hy, vf->list[1].x, hy, vec, vc->blocksize[1]);
1380 AV_DEBUG(" Floor decoded\n");
1385 // Read and decode residue
1387 static int vorbis_residue_decode(vorbis_context *vc, vorbis_residue *vr, uint_fast8_t ch, uint_fast8_t *do_not_decode, float *vec, uint_fast16_t vlen) {
1388 GetBitContext *gb=&vc->gb;
1389 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1390 uint_fast16_t n_to_read=vr->end-vr->begin;
1391 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1392 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1394 uint_fast8_t ch_used;
1400 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1402 if (do_not_decode[0]) return 0;
1408 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1410 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1411 uint_fast16_t voffset;
1412 uint_fast16_t partition_count;
1413 uint_fast16_t j_times_ptns_to_read;
1416 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1418 uint_fast32_t inverse_class = inverse[vr->classifications];
1419 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1420 if (!do_not_decode[j]) {
1421 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1422 vc->codebooks[vr->classbook].nb_bits, 3);
1424 AV_DEBUG("Classword: %d \n", temp);
1426 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1427 for(i=0;i<c_p_c;++i) {
1428 uint_fast32_t temp2;
1430 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1431 if (partition_count+c_p_c-1-i < ptns_to_read) {
1432 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1437 j_times_ptns_to_read+=ptns_to_read;
1440 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1441 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1442 uint_fast16_t voffs;
1444 if (!do_not_decode[j]) {
1445 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1446 int_fast16_t vqbook=vr->books[vqclass][pass];
1449 uint_fast16_t coffs;
1450 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1451 uint_fast16_t step= dim==1 ? vr->partition_size
1452 : FASTDIV(vr->partition_size, dim);
1453 vorbis_codebook codebook= vc->codebooks[vqbook];
1457 voffs=voffset+j*vlen;
1458 for(k=0;k<step;++k) {
1459 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1460 for(l=0;l<dim;++l) {
1461 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1465 else if (vr->type==1) {
1466 voffs=voffset+j*vlen;
1467 for(k=0;k<step;++k) {
1468 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1469 for(l=0;l<dim;++l, ++voffs) {
1470 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1472 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1476 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1480 for(k=0;k<step;++k) {
1481 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1482 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1483 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1486 for(k=0;k<step;++k) {
1487 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1488 for(l=0;l<dim;l+=2, voffs++) {
1489 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1490 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1492 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);
1497 else if (vr->type==2) {
1500 for(k=0;k<step;++k) {
1501 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1502 for(l=0;l<dim;++l, ++voffs) {
1503 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1505 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);
1509 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1514 j_times_ptns_to_read+=ptns_to_read;
1517 voffset+=vr->partition_size;
1524 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1527 for(i=0; i<blocksize; i++)
1531 ang[i]=mag[i]-ang[i];
1549 // Decode the audio packet using the functions above
1551 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1552 GetBitContext *gb=&vc->gb;
1554 uint_fast8_t previous_window=0,next_window=0;
1555 uint_fast8_t mode_number;
1556 uint_fast16_t blocksize;
1558 uint_fast8_t no_residue[vc->audio_channels];
1559 uint_fast8_t do_not_decode[vc->audio_channels];
1560 vorbis_mapping *mapping;
1561 float *ch_res_ptr=vc->channel_residues;
1562 float *ch_floor_ptr=vc->channel_floors;
1563 uint_fast8_t res_chan[vc->audio_channels];
1564 uint_fast8_t res_num=0;
1565 int_fast16_t retlen=0;
1566 uint_fast16_t saved_start=0;
1567 float fadd_bias = vc->add_bias;
1569 if (get_bits1(gb)) {
1570 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1571 return -1; // packet type not audio
1574 if (vc->mode_count==1) {
1577 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1579 vc->mode_number=mode_number;
1580 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1582 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1584 if (vc->modes[mode_number].blockflag) {
1585 previous_window=get_bits1(gb);
1586 next_window=get_bits1(gb);
1589 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1590 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1591 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1595 for(i=0;i<vc->audio_channels;++i) {
1596 vorbis_floor *floor;
1597 if (mapping->submaps>1) {
1598 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1600 floor=&vc->floors[mapping->submap_floor[0]];
1603 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1604 ch_floor_ptr+=blocksize/2;
1607 // Nonzero vector propagate
1609 for(i=mapping->coupling_steps-1;i>=0;--i) {
1610 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1611 no_residue[mapping->magnitude[i]]=0;
1612 no_residue[mapping->angle[i]]=0;
1618 for(i=0;i<mapping->submaps;++i) {
1619 vorbis_residue *residue;
1622 for(j=0;j<vc->audio_channels;++j) {
1623 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1624 res_chan[j]=res_num;
1625 if (no_residue[j]) {
1626 do_not_decode[ch]=1;
1628 do_not_decode[ch]=0;
1634 residue=&vc->residues[mapping->submap_residue[i]];
1635 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1637 ch_res_ptr+=ch*blocksize/2;
1642 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1645 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1646 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1647 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1652 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1653 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1654 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1657 // MDCT, overlap/add, save data for next overlapping FPMATH
1659 for(j=0;j<vc->audio_channels;++j) {
1660 uint_fast8_t step=vc->audio_channels;
1662 float *saved=vc->saved+j*vc->blocksize[1]/2;
1664 const float *lwin=vc->win[1];
1665 const float *swin=vc->win[0];
1667 float *buf_tmp=vc->buf_tmp;
1669 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1671 saved_start=vc->saved_start;
1673 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1675 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1676 if (vc->modes[mode_number].blockflag) {
1678 if (previous_window) {
1679 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1680 retlen=vc->blocksize[1]/2;
1682 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1684 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1685 k = vc->blocksize[0]/2*step + j;
1686 buf += vc->blocksize[0]/2;
1688 for(i=0; i<len; i++, k+=step)
1689 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1691 for(i=0; i<len; i++, k+=step)
1692 ret[k] = buf[i] + fadd_bias;
1695 retlen=vc->blocksize[0]/2+len;
1699 buf += vc->blocksize[1]/2;
1700 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1703 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1704 buf += vc->blocksize[1]/2;
1705 for(i=0; i<saved_start; i++)
1706 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1707 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1712 for(k=j, i=0;i<saved_start;++i, k+=step)
1713 ret[k] = saved[i] + fadd_bias;
1715 for(k=j, i=0;i<saved_start;++i, k+=step)
1718 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1719 retlen=saved_start+vc->blocksize[0]/2;
1721 buf += vc->blocksize[0]/2;
1722 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1726 vc->saved_start=saved_start;
1728 return retlen*vc->audio_channels;
1731 // Return the decoded audio packet through the standard api
1733 static int vorbis_decode_frame(AVCodecContext *avccontext,
1734 void *data, int *data_size,
1735 uint8_t *buf, int buf_size)
1737 vorbis_context *vc = avccontext->priv_data ;
1738 GetBitContext *gb = &(vc->gb);
1746 AV_DEBUG("packet length %d \n", buf_size);
1748 init_get_bits(gb, buf, buf_size*8);
1750 len=vorbis_parse_audio_packet(vc);
1757 if (!vc->first_frame) {
1763 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1765 vc->dsp.float_to_int16(data, vc->ret, len);
1773 static int vorbis_decode_close(AVCodecContext *avccontext) {
1774 vorbis_context *vc = avccontext->priv_data;
1781 AVCodec vorbis_decoder = {
1785 sizeof(vorbis_context),
1788 vorbis_decode_close,
1789 vorbis_decode_frame,