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 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
30 #define ALT_BITSTREAM_READER_LE
32 #include "bitstream.h"
40 #define V_MAX_VLCS (1<<16)
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;
70 struct vorbis_floor0_s
74 uint_fast16_t bark_map_size;
75 int_fast32_t * map[2];
76 uint_fast32_t map_size[2];
77 uint_fast8_t amplitude_bits;
78 uint_fast8_t amplitude_offset;
79 uint_fast8_t num_books;
80 uint_fast8_t * book_list;
83 struct vorbis_floor1_s
85 uint_fast8_t partitions;
86 uint_fast8_t maximum_class;
87 uint_fast8_t partition_class[32];
88 uint_fast8_t class_dimensions[16];
89 uint_fast8_t class_subclasses[16];
90 uint_fast8_t class_masterbook[16];
91 int_fast16_t subclass_books[16][8];
92 uint_fast8_t multiplier;
93 uint_fast16_t x_list_dim;
94 floor1_entry_t * list;
103 uint_fast32_t partition_size;
104 uint_fast8_t classifications;
105 uint_fast8_t classbook;
106 int_fast16_t books[64][8];
107 uint_fast8_t maxpass;
111 uint_fast8_t submaps;
112 uint_fast16_t coupling_steps;
113 uint_fast8_t *magnitude;
116 uint_fast8_t submap_floor[16];
117 uint_fast8_t submap_residue[16];
121 uint_fast8_t blockflag;
122 uint_fast16_t windowtype;
123 uint_fast16_t transformtype;
124 uint_fast8_t mapping;
127 typedef struct vorbis_context_s {
128 AVCodecContext *avccontext;
133 uint_fast8_t first_frame;
134 uint_fast32_t version;
135 uint_fast8_t audio_channels;
136 uint_fast32_t audio_samplerate;
137 uint_fast32_t bitrate_maximum;
138 uint_fast32_t bitrate_nominal;
139 uint_fast32_t bitrate_minimum;
140 uint_fast32_t blocksize[2];
141 const float * win[2];
142 uint_fast16_t codebook_count;
143 vorbis_codebook *codebooks;
144 uint_fast8_t floor_count;
145 vorbis_floor *floors;
146 uint_fast8_t residue_count;
147 vorbis_residue *residues;
148 uint_fast8_t mapping_count;
149 vorbis_mapping *mappings;
150 uint_fast8_t mode_count;
152 uint_fast8_t mode_number; // mode number for the current packet
153 float *channel_residues;
154 float *channel_floors;
156 uint_fast16_t saved_start;
160 uint_fast32_t add_bias; // for float->int conversion
161 uint_fast32_t exp_bias;
164 /* Helper functions */
167 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
169 unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
170 unsigned int ret=0, i, j;
174 for(i=0,j=ret;i<n-1;i++) j*=ret;
180 static float vorbisfloat2float(uint_fast32_t val) {
181 double mant=val&0x1fffff;
182 long exp=(val&0x7fe00000L)>>21;
183 if (val&0x80000000) mant=-mant;
184 return(ldexp(mant, exp-20-768));
188 // Generate vlc codes from vorbis huffman code lengths
190 int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
191 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
192 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
195 uint_fast32_t code,p;
201 for(p=0;(bits[p]==0) && (p<num);++p);
203 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
208 for(i=0;i<bits[p];++i) {
209 exit_at_level[i+1]=1<<i;
213 av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
214 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
215 for(i=0;i<bits[p];++i) {
216 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
218 av_log(NULL, AV_LOG_INFO, "\n");
224 if (bits[p]==0) continue;
225 // find corresponding exit(node which the tree can grow further from)
226 for(i=bits[p];i>0;--i) {
227 if (exit_at_level[i]) break;
229 if (!i) return 1; // overspecified tree
230 code=exit_at_level[i];
232 // construct code (append 0s to end) and introduce new exits
233 for(j=i+1;j<=bits[p];++j) {
234 exit_at_level[j]=code+(1<<(j-1));
239 av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
240 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
241 for(i=0;i<bits[p];++i) {
242 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
244 av_log(NULL, AV_LOG_INFO, "\n");
249 //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
251 if (exit_at_level[p]) return 1;
256 void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
260 for (i = 2; i < values; i++) {
265 for (j = 2; j < i; j++) {
267 if (tmp < list[i].x) {
268 if (tmp > list[list[i].low].x) list[i].low = j;
270 if (tmp < list[list[i].high].x) list[i].high = j;
274 for (i = 0; i < values - 1; i++) {
276 for (j = i + 1; j < values; j++) {
277 if (list[list[i].sort].x > list[list[j].sort].x) {
278 int tmp = list[i].sort;
279 list[i].sort = list[j].sort;
286 // Free all allocated memory -----------------------------------------
288 static void vorbis_free(vorbis_context *vc) {
291 av_freep(&vc->channel_residues);
292 av_freep(&vc->channel_floors);
293 av_freep(&vc->saved);
296 av_freep(&vc->buf_tmp);
298 av_freep(&vc->residues);
299 av_freep(&vc->modes);
301 ff_mdct_end(&vc->mdct[0]);
302 ff_mdct_end(&vc->mdct[1]);
304 for(i=0;i<vc->codebook_count;++i) {
305 av_free(vc->codebooks[i].codevectors);
306 free_vlc(&vc->codebooks[i].vlc);
308 av_freep(&vc->codebooks);
310 for(i=0;i<vc->floor_count;++i) {
311 if(vc->floors[i].floor_type==0) {
312 av_free(vc->floors[i].data.t0.map[0]);
313 av_free(vc->floors[i].data.t0.map[1]);
314 av_free(vc->floors[i].data.t0.book_list);
315 av_free(vc->floors[i].data.t0.lsp);
318 av_free(vc->floors[i].data.t1.list);
321 av_freep(&vc->floors);
323 for(i=0;i<vc->mapping_count;++i) {
324 av_free(vc->mappings[i].magnitude);
325 av_free(vc->mappings[i].angle);
326 av_free(vc->mappings[i].mux);
328 av_freep(&vc->mappings);
331 av_freep(&vc->win[0]);
332 av_freep(&vc->win[1]);
336 // Parse setup header -------------------------------------------------
338 // Process codebooks part
340 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
342 uint8_t *tmp_vlc_bits;
343 uint32_t *tmp_vlc_codes;
344 GetBitContext *gb=&vc->gb;
346 vc->codebook_count=get_bits(gb,8)+1;
348 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
350 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
351 tmp_vlc_bits=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
352 tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
354 for(cb=0;cb<vc->codebook_count;++cb) {
355 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
356 uint_fast8_t ordered;
357 uint_fast32_t t, used_entries=0;
358 uint_fast32_t entries;
360 AV_DEBUG(" %d. Codebook \n", cb);
362 if (get_bits(gb, 24)!=0x564342) {
363 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
367 codebook_setup->dimensions=get_bits(gb, 16);
368 if (codebook_setup->dimensions>16) {
369 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
372 entries=get_bits(gb, 24);
373 if (entries>V_MAX_VLCS) {
374 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
378 ordered=get_bits1(gb);
380 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
385 uint_fast8_t sparse=get_bits1(gb);
387 AV_DEBUG(" not ordered \n");
390 AV_DEBUG(" sparse \n");
393 for(ce=0;ce<entries;++ce) {
396 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
399 else tmp_vlc_bits[ce]=0;
402 AV_DEBUG(" not sparse \n");
404 used_entries=entries;
405 for(ce=0;ce<entries;++ce) {
406 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
410 uint_fast16_t current_entry=0;
411 uint_fast8_t current_length=get_bits(gb, 5)+1;
413 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
415 used_entries=entries;
416 for(;current_entry<used_entries;++current_length) {
417 uint_fast16_t i, number;
419 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
421 number=get_bits(gb, ilog(entries - current_entry));
423 AV_DEBUG(" number: %d \n", number);
425 for(i=current_entry;i<number+current_entry;++i) {
426 if (i<used_entries) tmp_vlc_bits[i]=current_length;
429 current_entry+=number;
431 if (current_entry>used_entries) {
432 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
437 codebook_setup->lookup_type=get_bits(gb, 4);
439 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
441 // If the codebook is used for (inverse) VQ, calculate codevectors.
443 if (codebook_setup->lookup_type==1) {
444 uint_fast16_t i, j, k;
445 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
446 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
448 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
449 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
450 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
451 uint_fast8_t codebook_sequence_p=get_bits1(gb);
453 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
454 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
456 for(i=0;i<codebook_lookup_values;++i) {
457 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
459 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
460 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
463 // Weed out unused vlcs and build codevector vector
464 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
465 for(j=0, i=0;i<entries;++i) {
466 uint_fast8_t dim=codebook_setup->dimensions;
468 if (tmp_vlc_bits[i]) {
470 uint_fast32_t lookup_offset=i;
473 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
477 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
478 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
479 if (codebook_sequence_p) {
480 last=codebook_setup->codevectors[j*dim+k];
482 lookup_offset/=codebook_lookup_values;
484 tmp_vlc_bits[j]=tmp_vlc_bits[i];
487 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
489 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
491 av_log(vc->avccontext, AV_LOG_INFO, "\n");
497 if (j!=used_entries) {
498 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
501 entries=used_entries;
503 else if (codebook_setup->lookup_type>=2) {
504 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
508 // Initialize VLC table
509 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
510 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
513 codebook_setup->maxdepth=0;
514 for(t=0;t<entries;++t)
515 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
517 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
518 else codebook_setup->nb_bits=V_NB_BITS;
520 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
522 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)) {
523 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
528 av_free(tmp_vlc_bits);
529 av_free(tmp_vlc_codes);
534 av_free(tmp_vlc_bits);
535 av_free(tmp_vlc_codes);
539 // Process time domain transforms part (unused in Vorbis I)
541 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
542 GetBitContext *gb=&vc->gb;
544 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
546 for(i=0;i<vorbis_time_count;++i) {
547 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
549 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
551 if (vorbis_tdtransform) {
552 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
559 // Process floors part
561 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
562 vorbis_floor_data *vfu, float *vec);
563 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
564 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
565 vorbis_floor_data *vfu, float *vec);
566 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
567 GetBitContext *gb=&vc->gb;
570 vc->floor_count=get_bits(gb, 6)+1;
572 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
574 for (i=0;i<vc->floor_count;++i) {
575 vorbis_floor *floor_setup=&vc->floors[i];
577 floor_setup->floor_type=get_bits(gb, 16);
579 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
581 if (floor_setup->floor_type==1) {
582 uint_fast8_t maximum_class=0;
583 uint_fast8_t rangebits;
584 uint_fast16_t floor1_values=2;
586 floor_setup->decode=vorbis_floor1_decode;
588 floor_setup->data.t1.partitions=get_bits(gb, 5);
590 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
592 for(j=0;j<floor_setup->data.t1.partitions;++j) {
593 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
594 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
596 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
600 AV_DEBUG(" maximum class %d \n", maximum_class);
602 floor_setup->data.t1.maximum_class=maximum_class;
604 for(j=0;j<=maximum_class;++j) {
605 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
606 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
608 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]);
610 if (floor_setup->data.t1.class_subclasses[j]) {
611 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
613 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
616 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
617 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
619 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
623 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
624 floor_setup->data.t1.x_list_dim=2;
626 for(j=0;j<floor_setup->data.t1.partitions;++j) {
627 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
630 floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t));
633 rangebits=get_bits(gb, 4);
634 floor_setup->data.t1.list[0].x = 0;
635 floor_setup->data.t1.list[1].x = (1<<rangebits);
637 for(j=0;j<floor_setup->data.t1.partitions;++j) {
638 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
639 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
641 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
645 // Precalculate order of x coordinates - needed for decode
646 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
648 else if(floor_setup->floor_type==0) {
649 uint_fast8_t max_codebook_dim=0;
651 floor_setup->decode=vorbis_floor0_decode;
653 floor_setup->data.t0.order=get_bits(gb, 8);
654 floor_setup->data.t0.rate=get_bits(gb, 16);
655 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
656 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
657 /* zero would result in a div by zero later *
659 if (floor_setup->data.t0.amplitude_bits == 0) {
660 av_log(vc->avccontext, AV_LOG_ERROR,
661 "Floor 0 amplitude bits is 0.\n");
664 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
665 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
667 /* allocate mem for booklist */
668 floor_setup->data.t0.book_list=
669 av_malloc(floor_setup->data.t0.num_books);
670 if(!floor_setup->data.t0.book_list) { return 1; }
671 /* read book indexes */
674 uint_fast8_t book_idx;
675 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
676 book_idx=get_bits(gb, 8);
677 floor_setup->data.t0.book_list[idx]=book_idx;
678 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
679 max_codebook_dim=vc->codebooks[book_idx].dimensions;
681 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
688 /* allocate mem for lsp coefficients */
690 /* codebook dim is for padding if codebook dim doesn't *
691 * divide order+1 then we need to read more data */
692 floor_setup->data.t0.lsp=
693 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
695 if(!floor_setup->data.t0.lsp) { return 1; }
698 #ifdef V_DEBUG /* debug output parsed headers */
699 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
700 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
701 AV_DEBUG("floor0 bark map size: %u\n",
702 floor_setup->data.t0.bark_map_size);
703 AV_DEBUG("floor0 amplitude bits: %u\n",
704 floor_setup->data.t0.amplitude_bits);
705 AV_DEBUG("floor0 amplitude offset: %u\n",
706 floor_setup->data.t0.amplitude_offset);
707 AV_DEBUG("floor0 number of books: %u\n",
708 floor_setup->data.t0.num_books);
709 AV_DEBUG("floor0 book list pointer: %p\n",
710 floor_setup->data.t0.book_list);
713 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
714 AV_DEBUG( " Book %d: %u\n",
716 floor_setup->data.t0.book_list[idx] );
722 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
729 // Process residues part
731 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
732 GetBitContext *gb=&vc->gb;
733 uint_fast8_t i, j, k;
735 vc->residue_count=get_bits(gb, 6)+1;
736 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
738 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
740 for(i=0;i<vc->residue_count;++i) {
741 vorbis_residue *res_setup=&vc->residues[i];
742 uint_fast8_t cascade[64];
743 uint_fast8_t high_bits;
744 uint_fast8_t low_bits;
746 res_setup->type=get_bits(gb, 16);
748 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
750 res_setup->begin=get_bits(gb, 24);
751 res_setup->end=get_bits(gb, 24);
752 res_setup->partition_size=get_bits(gb, 24)+1;
753 res_setup->classifications=get_bits(gb, 6)+1;
754 res_setup->classbook=get_bits(gb, 8);
756 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,
757 res_setup->classifications, res_setup->classbook);
759 for(j=0;j<res_setup->classifications;++j) {
761 low_bits=get_bits(gb, 3);
763 high_bits=get_bits(gb, 5);
765 cascade[j]=(high_bits<<3)+low_bits;
767 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
770 res_setup->maxpass=0;
771 for(j=0;j<res_setup->classifications;++j) {
773 if (cascade[j]&(1<<k)) {
774 res_setup->books[j][k]=get_bits(gb, 8);
776 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
778 if (k>res_setup->maxpass) {
779 res_setup->maxpass=k;
782 res_setup->books[j][k]=-1;
790 // Process mappings part
792 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
793 GetBitContext *gb=&vc->gb;
796 vc->mapping_count=get_bits(gb, 6)+1;
797 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
799 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
801 for(i=0;i<vc->mapping_count;++i) {
802 vorbis_mapping *mapping_setup=&vc->mappings[i];
804 if (get_bits(gb, 16)) {
805 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
809 mapping_setup->submaps=get_bits(gb, 4)+1;
811 mapping_setup->submaps=1;
815 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
816 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
817 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
818 for(j=0;j<mapping_setup->coupling_steps;++j) {
819 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
820 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
821 // FIXME: sanity checks
824 mapping_setup->coupling_steps=0;
827 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
829 if(get_bits(gb, 2)) {
830 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
831 return 1; // following spec.
834 if (mapping_setup->submaps>1) {
835 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
836 for(j=0;j<vc->audio_channels;++j) {
837 mapping_setup->mux[j]=get_bits(gb, 4);
841 for(j=0;j<mapping_setup->submaps;++j) {
842 get_bits(gb, 8); // FIXME check?
843 mapping_setup->submap_floor[j]=get_bits(gb, 8);
844 mapping_setup->submap_residue[j]=get_bits(gb, 8);
846 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
852 // Process modes part
854 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
856 vorbis_floor * floors=vc->floors;
859 int_fast8_t blockflag;
861 int_fast32_t n; //TODO: could theoretically be smaller?
863 for (blockflag=0;blockflag<2;++blockflag)
865 n=vc->blocksize[blockflag]/2;
866 floors[floor_number].data.t0.map[blockflag]=
867 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
869 map=floors[floor_number].data.t0.map[blockflag];
870 vf=&floors[floor_number].data.t0;
872 for (idx=0; idx<n;++idx) {
873 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
874 ((vf->bark_map_size)/
875 BARK(vf->rate/2.0f )) );
876 if (vf->bark_map_size-1 < map[idx]) {
877 map[idx]=vf->bark_map_size-1;
881 vf->map_size[blockflag]=n;
885 for(idx=0;idx<=n;++idx) {
886 AV_DEBUG("floor0 map: map at pos %d is %d\n",
892 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
893 GetBitContext *gb=&vc->gb;
896 vc->mode_count=get_bits(gb, 6)+1;
897 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
899 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
901 for(i=0;i<vc->mode_count;++i) {
902 vorbis_mode *mode_setup=&vc->modes[i];
904 mode_setup->blockflag=get_bits(gb, 1);
905 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
906 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
907 mode_setup->mapping=get_bits(gb, 8); //FIXME check
909 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);
914 // Process the whole setup header using the functions above
916 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
917 GetBitContext *gb=&vc->gb;
919 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
920 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
921 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
922 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
926 if (vorbis_parse_setup_hdr_codebooks(vc)) {
927 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
930 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
931 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
934 if (vorbis_parse_setup_hdr_floors(vc)) {
935 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
938 if (vorbis_parse_setup_hdr_residues(vc)) {
939 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
942 if (vorbis_parse_setup_hdr_mappings(vc)) {
943 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
946 if (vorbis_parse_setup_hdr_modes(vc)) {
947 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
950 if (!get_bits1(gb)) {
951 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
952 return 8; // framing flag bit unset error
958 // Process the identification header
960 static int vorbis_parse_id_hdr(vorbis_context *vc){
961 GetBitContext *gb=&vc->gb;
962 uint_fast8_t bl0, bl1;
964 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
965 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
966 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
967 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
971 vc->version=get_bits_long(gb, 32); //FIXME check 0
972 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
973 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
974 vc->bitrate_maximum=get_bits_long(gb, 32);
975 vc->bitrate_nominal=get_bits_long(gb, 32);
976 vc->bitrate_minimum=get_bits_long(gb, 32);
979 vc->blocksize[0]=(1<<bl0);
980 vc->blocksize[1]=(1<<bl1);
981 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
982 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
985 // output format int16
986 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
987 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
988 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
989 "output packets too large.\n");
992 vc->win[0]=ff_vorbis_vwin[bl0-6];
993 vc->win[1]=ff_vorbis_vwin[bl1-6];
998 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
999 for(i=0; i<vc->blocksize[j]/2; i++)
1000 win[i] = vc->win[j][i] * (1<<15);
1005 if ((get_bits1(gb)) == 0) {
1006 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1010 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1011 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1012 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1013 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1014 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1015 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1018 ff_mdct_init(&vc->mdct[0], bl0, 1);
1019 ff_mdct_init(&vc->mdct[1], bl1, 1);
1021 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 ",
1022 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1025 BLK=vc->blocksize[0];
1026 for(i=0;i<BLK/2;++i) {
1027 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)));
1034 // Process the extradata using the functions above (identification header, setup header)
1036 static int vorbis_decode_init(AVCodecContext *avccontext) {
1037 vorbis_context *vc = avccontext->priv_data ;
1038 uint8_t *headers = avccontext->extradata;
1039 int headers_len=avccontext->extradata_size;
1040 uint8_t *header_start[3];
1042 GetBitContext *gb = &(vc->gb);
1045 vc->avccontext = avccontext;
1046 dsputil_init(&vc->dsp, avccontext);
1048 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
1053 vc->exp_bias = 15<<23;
1057 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1061 if (ff_split_xiph_headers(headers, headers_len, 30, header_start, header_len) < 0) {
1062 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1066 init_get_bits(gb, header_start[0], header_len[0]*8);
1067 hdr_type=get_bits(gb, 8);
1069 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1072 if (vorbis_parse_id_hdr(vc)) {
1073 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1078 init_get_bits(gb, header_start[2], header_len[2]*8);
1079 hdr_type=get_bits(gb, 8);
1081 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1084 if (vorbis_parse_setup_hdr(vc)) {
1085 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1090 avccontext->channels = vc->audio_channels;
1091 avccontext->sample_rate = vc->audio_samplerate;
1096 // Decode audiopackets -------------------------------------------------
1098 // Read and decode floor
1100 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1101 vorbis_floor_data *vfu, float *vec) {
1102 vorbis_floor0 * vf=&vfu->t0;
1103 float * lsp=vf->lsp;
1104 uint_fast32_t amplitude;
1105 uint_fast32_t book_idx;
1106 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1108 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1111 uint_fast16_t lsp_len = 0;
1113 vorbis_codebook codebook;
1115 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1116 if ( book_idx >= vf->num_books ) {
1117 av_log( vc->avccontext, AV_LOG_ERROR,
1118 "floor0 dec: booknumber too high!\n" );
1121 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1122 codebook=vc->codebooks[vf->book_list[book_idx]];
1124 while (lsp_len<vf->order) {
1127 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1128 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1129 /* read temp vector */
1130 vec_off=get_vlc2(&vc->gb,
1133 codebook.maxdepth ) *
1134 codebook.dimensions;
1135 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1136 /* copy each vector component and add last to it */
1137 for (idx=0; idx<codebook.dimensions; ++idx) {
1138 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1140 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1142 lsp_len += codebook.dimensions;
1145 /* DEBUG: output lsp coeffs */
1148 for ( idx = 0; idx < lsp_len; ++idx )
1149 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1153 /* synthesize floor output vector */
1156 int order=vf->order;
1157 float wstep=M_PI/vf->bark_map_size;
1159 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1161 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1162 vf->map_size, order, wstep);
1165 while(i<vf->map_size[blockflag]) {
1166 int j, iter_cond=vf->map[blockflag][i];
1169 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1171 /* similar part for the q and p products */
1172 for(j=0;j<order;j+=2) {
1173 q *= lsp[j] -two_cos_w;
1174 p *= lsp[j+1]-two_cos_w;
1176 if(j==order) { // even order
1177 p *= p*(2.0f-two_cos_w);
1178 q *= q*(2.0f+two_cos_w);
1181 q *= two_cos_w-lsp[j]; // one more time for q
1183 /* final step and square */
1184 p *= p*(4.f-two_cos_w*two_cos_w);
1188 /* calculate linear floor value */
1191 ( (amplitude*vf->amplitude_offset)/
1192 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1193 - vf->amplitude_offset ) * .11512925f
1198 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1203 /* this channel is unused */
1207 AV_DEBUG(" Floor0 decoded\n");
1212 static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
1215 int ady = FFABS(dy);
1216 int base = dy / adx;
1221 if (dy < 0) sy = base - 1;
1223 ady = ady - FFABS(base) * adx;
1225 buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1226 for (x = x0 + 1; x < x1; x++) {
1235 buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1239 void ff_vorbis_floor1_render_list(floor1_entry_t * list, int values, uint_fast16_t * y_list, int * flag, int multiplier, float * out, int samples) {
1242 ly = y_list[0] * multiplier;
1243 for (i = 1; i < values; i++) {
1244 int pos = list[i].sort;
1246 render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
1248 ly = y_list[pos] * multiplier;
1250 if (lx >= samples) break;
1252 if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
1255 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1256 vorbis_floor1 * vf=&vfu->t1;
1257 GetBitContext *gb=&vc->gb;
1258 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1259 uint_fast16_t range=range_v[vf->multiplier-1];
1260 uint_fast16_t floor1_Y[vf->x_list_dim];
1261 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1262 int floor1_flag[vf->x_list_dim];
1263 uint_fast8_t class_;
1269 uint_fast16_t offset;
1271 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1272 int_fast16_t dy, err;
1275 if (!get_bits1(gb)) return 1; // silence
1277 // Read values (or differences) for the floor's points
1279 floor1_Y[0]=get_bits(gb, ilog(range-1));
1280 floor1_Y[1]=get_bits(gb, ilog(range-1));
1282 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1285 for(i=0;i<vf->partitions;++i) {
1286 class_=vf->partition_class[i];
1287 cdim=vf->class_dimensions[class_];
1288 cbits=vf->class_subclasses[class_];
1292 AV_DEBUG("Cbits %d \n", cbits);
1294 if (cbits) { // this reads all subclasses for this partition's class
1295 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1296 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1299 for(j=0;j<cdim;++j) {
1300 book=vf->subclass_books[class_][cval & csub];
1302 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1306 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1307 vc->codebooks[book].nb_bits, 3);
1309 floor1_Y[offset+j]=0;
1312 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1317 // Amplitude calculation from the differences
1321 floor1_Y_final[0]=floor1_Y[0];
1322 floor1_Y_final[1]=floor1_Y[1];
1324 for(i=2;i<vf->x_list_dim;++i) {
1325 uint_fast16_t val, highroom, lowroom, room;
1326 uint_fast16_t high_neigh_offs;
1327 uint_fast16_t low_neigh_offs;
1329 low_neigh_offs=vf->list[i].low;
1330 high_neigh_offs=vf->list[i].high;
1331 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1332 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1334 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1335 off=(int16_t)err/(int16_t)adx;
1337 predicted=floor1_Y_final[low_neigh_offs]-off;
1339 predicted=floor1_Y_final[low_neigh_offs]+off;
1340 } // render_point end
1343 highroom=range-predicted;
1345 if (highroom < lowroom) {
1348 room=lowroom*2; // SPEC mispelling
1351 floor1_flag[low_neigh_offs]=1;
1352 floor1_flag[high_neigh_offs]=1;
1355 if (highroom > lowroom) {
1356 floor1_Y_final[i]=val-lowroom+predicted;
1358 floor1_Y_final[i]=predicted-val+highroom-1;
1362 floor1_Y_final[i]=predicted-(val+1)/2;
1364 floor1_Y_final[i]=predicted+val/2;
1369 floor1_Y_final[i]=predicted;
1372 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1375 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1377 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1379 AV_DEBUG(" Floor decoded\n");
1384 // Read and decode residue
1386 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) {
1387 GetBitContext *gb=&vc->gb;
1388 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1389 uint_fast16_t n_to_read=vr->end-vr->begin;
1390 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1391 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1393 uint_fast8_t ch_used;
1399 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1401 if (do_not_decode[0]) return 0;
1407 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1409 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1410 uint_fast16_t voffset;
1411 uint_fast16_t partition_count;
1412 uint_fast16_t j_times_ptns_to_read;
1415 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1417 uint_fast32_t inverse_class = ff_inverse[vr->classifications];
1418 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1419 if (!do_not_decode[j]) {
1420 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1421 vc->codebooks[vr->classbook].nb_bits, 3);
1423 AV_DEBUG("Classword: %d \n", temp);
1425 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1426 for(i=0;i<c_p_c;++i) {
1427 uint_fast32_t temp2;
1429 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1430 if (partition_count+c_p_c-1-i < ptns_to_read) {
1431 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1436 j_times_ptns_to_read+=ptns_to_read;
1439 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1440 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1441 uint_fast16_t voffs;
1443 if (!do_not_decode[j]) {
1444 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1445 int_fast16_t vqbook=vr->books[vqclass][pass];
1448 uint_fast16_t coffs;
1449 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1450 uint_fast16_t step= dim==1 ? vr->partition_size
1451 : FASTDIV(vr->partition_size, dim);
1452 vorbis_codebook codebook= vc->codebooks[vqbook];
1456 voffs=voffset+j*vlen;
1457 for(k=0;k<step;++k) {
1458 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1459 for(l=0;l<dim;++l) {
1460 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1464 else if (vr->type==1) {
1465 voffs=voffset+j*vlen;
1466 for(k=0;k<step;++k) {
1467 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1468 for(l=0;l<dim;++l, ++voffs) {
1469 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1471 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1475 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1479 for(k=0;k<step;++k) {
1480 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1481 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1482 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1485 for(k=0;k<step;++k) {
1486 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1487 for(l=0;l<dim;l+=2, voffs++) {
1488 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1489 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1491 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);
1496 else if (vr->type==2) {
1499 for(k=0;k<step;++k) {
1500 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1501 for(l=0;l<dim;++l, ++voffs) {
1502 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1504 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);
1508 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1513 j_times_ptns_to_read+=ptns_to_read;
1516 voffset+=vr->partition_size;
1523 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1526 for(i=0; i<blocksize; i++)
1530 ang[i]=mag[i]-ang[i];
1548 // Decode the audio packet using the functions above
1550 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1551 GetBitContext *gb=&vc->gb;
1553 uint_fast8_t previous_window=0,next_window=0;
1554 uint_fast8_t mode_number;
1555 uint_fast16_t blocksize;
1557 uint_fast8_t no_residue[vc->audio_channels];
1558 uint_fast8_t do_not_decode[vc->audio_channels];
1559 vorbis_mapping *mapping;
1560 float *ch_res_ptr=vc->channel_residues;
1561 float *ch_floor_ptr=vc->channel_floors;
1562 uint_fast8_t res_chan[vc->audio_channels];
1563 uint_fast8_t res_num=0;
1564 int_fast16_t retlen=0;
1565 uint_fast16_t saved_start=0;
1566 float fadd_bias = vc->add_bias;
1568 if (get_bits1(gb)) {
1569 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1570 return -1; // packet type not audio
1573 if (vc->mode_count==1) {
1576 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1578 vc->mode_number=mode_number;
1579 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1581 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1583 if (vc->modes[mode_number].blockflag) {
1584 previous_window=get_bits1(gb);
1585 next_window=get_bits1(gb);
1588 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1589 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1590 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1594 for(i=0;i<vc->audio_channels;++i) {
1595 vorbis_floor *floor;
1596 if (mapping->submaps>1) {
1597 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1599 floor=&vc->floors[mapping->submap_floor[0]];
1602 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1603 ch_floor_ptr+=blocksize/2;
1606 // Nonzero vector propagate
1608 for(i=mapping->coupling_steps-1;i>=0;--i) {
1609 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1610 no_residue[mapping->magnitude[i]]=0;
1611 no_residue[mapping->angle[i]]=0;
1617 for(i=0;i<mapping->submaps;++i) {
1618 vorbis_residue *residue;
1621 for(j=0;j<vc->audio_channels;++j) {
1622 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1623 res_chan[j]=res_num;
1624 if (no_residue[j]) {
1625 do_not_decode[ch]=1;
1627 do_not_decode[ch]=0;
1633 residue=&vc->residues[mapping->submap_residue[i]];
1634 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1636 ch_res_ptr+=ch*blocksize/2;
1641 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1644 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1645 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1646 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1651 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1652 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1653 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1656 // MDCT, overlap/add, save data for next overlapping FPMATH
1658 for(j=0;j<vc->audio_channels;++j) {
1659 uint_fast8_t step=vc->audio_channels;
1661 float *saved=vc->saved+j*vc->blocksize[1]/2;
1663 const float *lwin=vc->win[1];
1664 const float *swin=vc->win[0];
1666 float *buf_tmp=vc->buf_tmp;
1668 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1670 saved_start=vc->saved_start;
1672 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1674 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1675 if (vc->modes[mode_number].blockflag) {
1677 if (previous_window) {
1678 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1679 retlen=vc->blocksize[1]/2;
1681 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1683 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1684 k = vc->blocksize[0]/2*step + j;
1685 buf += vc->blocksize[0]/2;
1687 for(i=0; i<len; i++, k+=step)
1688 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1690 for(i=0; i<len; i++, k+=step)
1691 ret[k] = buf[i] + fadd_bias;
1694 retlen=vc->blocksize[0]/2+len;
1698 buf += vc->blocksize[1]/2;
1699 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1702 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1703 buf += vc->blocksize[1]/2;
1704 for(i=0; i<saved_start; i++)
1705 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1706 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1711 for(k=j, i=0;i<saved_start;++i, k+=step)
1712 ret[k] = saved[i] + fadd_bias;
1714 for(k=j, i=0;i<saved_start;++i, k+=step)
1717 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1718 retlen=saved_start+vc->blocksize[0]/2;
1720 buf += vc->blocksize[0]/2;
1721 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1725 vc->saved_start=saved_start;
1727 return retlen*vc->audio_channels;
1730 // Return the decoded audio packet through the standard api
1732 static int vorbis_decode_frame(AVCodecContext *avccontext,
1733 void *data, int *data_size,
1734 uint8_t *buf, int buf_size)
1736 vorbis_context *vc = avccontext->priv_data ;
1737 GetBitContext *gb = &(vc->gb);
1745 AV_DEBUG("packet length %d \n", buf_size);
1747 init_get_bits(gb, buf, buf_size*8);
1749 len=vorbis_parse_audio_packet(vc);
1756 if (!vc->first_frame) {
1762 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1764 vc->dsp.float_to_int16(data, vc->ret, len);
1772 static int vorbis_decode_close(AVCodecContext *avccontext) {
1773 vorbis_context *vc = avccontext->priv_data;
1780 AVCodec vorbis_decoder = {
1784 sizeof(vorbis_context),
1787 vorbis_decode_close,
1788 vorbis_decode_frame,