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"
39 #define V_MAX_VLCS (1<<16)
49 uint_fast8_t dimensions;
50 uint_fast8_t lookup_type;
51 uint_fast8_t maxdepth;
57 typedef union vorbis_floor_u vorbis_floor_data;
58 typedef struct vorbis_floor0_s vorbis_floor0;
59 typedef struct vorbis_floor1_s vorbis_floor1;
60 struct vorbis_context_s;
62 uint_fast8_t (* vorbis_floor_decode_func)
63 (struct vorbis_context_s *, vorbis_floor_data *, float *);
65 uint_fast8_t floor_type;
66 vorbis_floor_decode_func decode;
69 struct vorbis_floor0_s
73 uint_fast16_t bark_map_size;
74 int_fast32_t * map[2];
75 uint_fast32_t map_size[2];
76 uint_fast8_t amplitude_bits;
77 uint_fast8_t amplitude_offset;
78 uint_fast8_t num_books;
79 uint_fast8_t * book_list;
82 struct vorbis_floor1_s
84 uint_fast8_t partitions;
85 uint_fast8_t maximum_class;
86 uint_fast8_t partition_class[32];
87 uint_fast8_t class_dimensions[16];
88 uint_fast8_t class_subclasses[16];
89 uint_fast8_t class_masterbook[16];
90 int_fast16_t subclass_books[16][8];
91 uint_fast8_t multiplier;
92 uint_fast16_t x_list_dim;
93 floor1_entry_t * list;
102 uint_fast32_t partition_size;
103 uint_fast8_t classifications;
104 uint_fast8_t classbook;
105 int_fast16_t books[64][8];
106 uint_fast8_t maxpass;
110 uint_fast8_t submaps;
111 uint_fast16_t coupling_steps;
112 uint_fast8_t *magnitude;
115 uint_fast8_t submap_floor[16];
116 uint_fast8_t submap_residue[16];
120 uint_fast8_t blockflag;
121 uint_fast16_t windowtype;
122 uint_fast16_t transformtype;
123 uint_fast8_t mapping;
126 typedef struct vorbis_context_s {
127 AVCodecContext *avccontext;
132 uint_fast8_t first_frame;
133 uint_fast32_t version;
134 uint_fast8_t audio_channels;
135 uint_fast32_t audio_samplerate;
136 uint_fast32_t bitrate_maximum;
137 uint_fast32_t bitrate_nominal;
138 uint_fast32_t bitrate_minimum;
139 uint_fast32_t blocksize[2];
140 const float * win[2];
141 uint_fast16_t codebook_count;
142 vorbis_codebook *codebooks;
143 uint_fast8_t floor_count;
144 vorbis_floor *floors;
145 uint_fast8_t residue_count;
146 vorbis_residue *residues;
147 uint_fast8_t mapping_count;
148 vorbis_mapping *mappings;
149 uint_fast8_t mode_count;
151 uint_fast8_t mode_number; // mode number for the current packet
152 float *channel_residues;
153 float *channel_floors;
155 uint_fast16_t saved_start;
159 uint_fast32_t add_bias; // for float->int conversion
160 uint_fast32_t exp_bias;
163 /* Helper functions */
166 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
168 unsigned int ff_vorbis_nth_root(unsigned int x, unsigned int n) { // x^(1/n)
169 unsigned int ret=0, i, j;
173 for(i=0,j=ret;i<n-1;i++) j*=ret;
179 static float vorbisfloat2float(uint_fast32_t val) {
180 double mant=val&0x1fffff;
181 long exp=(val&0x7fe00000L)>>21;
182 if (val&0x80000000) mant=-mant;
183 return(ldexp(mant, exp-20-768));
187 // Generate vlc codes from vorbis huffman code lengths
189 int ff_vorbis_len2vlc(uint8_t *bits, uint32_t *codes, uint_fast32_t num) {
190 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
191 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
194 uint_fast32_t code,p;
200 for(p=0;(bits[p]==0) && (p<num);++p);
202 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
207 for(i=0;i<bits[p];++i) {
208 exit_at_level[i+1]=1<<i;
212 av_log(NULL, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
213 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
214 for(i=0;i<bits[p];++i) {
215 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
217 av_log(NULL, AV_LOG_INFO, "\n");
223 if (bits[p]==0) continue;
224 // find corresponding exit(node which the tree can grow further from)
225 for(i=bits[p];i>0;--i) {
226 if (exit_at_level[i]) break;
228 if (!i) return 1; // overspecified tree
229 code=exit_at_level[i];
231 // construct code (append 0s to end) and introduce new exits
232 for(j=i+1;j<=bits[p];++j) {
233 exit_at_level[j]=code+(1<<(j-1));
238 av_log(NULL, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
239 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
240 for(i=0;i<bits[p];++i) {
241 av_log(NULL, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
243 av_log(NULL, AV_LOG_INFO, "\n");
248 //no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
250 if (exit_at_level[p]) return 1;
255 void ff_vorbis_ready_floor1_list(floor1_entry_t * list, int values) {
259 for (i = 2; i < values; i++) {
264 for (j = 2; j < i; j++) {
266 if (tmp < list[i].x) {
267 if (tmp > list[list[i].low].x) list[i].low = j;
269 if (tmp < list[list[i].high].x) list[i].high = j;
273 for (i = 0; i < values - 1; i++) {
275 for (j = i + 1; j < values; j++) {
276 if (list[list[i].sort].x > list[list[j].sort].x) {
277 int tmp = list[i].sort;
278 list[i].sort = list[j].sort;
285 // Free all allocated memory -----------------------------------------
287 static void vorbis_free(vorbis_context *vc) {
290 av_freep(&vc->channel_residues);
291 av_freep(&vc->channel_floors);
292 av_freep(&vc->saved);
295 av_freep(&vc->buf_tmp);
297 av_freep(&vc->residues);
298 av_freep(&vc->modes);
300 ff_mdct_end(&vc->mdct[0]);
301 ff_mdct_end(&vc->mdct[1]);
303 for(i=0;i<vc->codebook_count;++i) {
304 av_free(vc->codebooks[i].codevectors);
305 free_vlc(&vc->codebooks[i].vlc);
307 av_freep(&vc->codebooks);
309 for(i=0;i<vc->floor_count;++i) {
310 if(vc->floors[i].floor_type==0) {
311 av_free(vc->floors[i].data.t0.map[0]);
312 av_free(vc->floors[i].data.t0.map[1]);
313 av_free(vc->floors[i].data.t0.book_list);
314 av_free(vc->floors[i].data.t0.lsp);
317 av_free(vc->floors[i].data.t1.list);
320 av_freep(&vc->floors);
322 for(i=0;i<vc->mapping_count;++i) {
323 av_free(vc->mappings[i].magnitude);
324 av_free(vc->mappings[i].angle);
325 av_free(vc->mappings[i].mux);
327 av_freep(&vc->mappings);
330 av_freep(&vc->win[0]);
331 av_freep(&vc->win[1]);
335 // Parse setup header -------------------------------------------------
337 // Process codebooks part
339 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
341 uint8_t *tmp_vlc_bits;
342 uint32_t *tmp_vlc_codes;
343 GetBitContext *gb=&vc->gb;
345 vc->codebook_count=get_bits(gb,8)+1;
347 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
349 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
350 tmp_vlc_bits=(uint8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint8_t));
351 tmp_vlc_codes=(uint32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint32_t));
353 for(cb=0;cb<vc->codebook_count;++cb) {
354 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
355 uint_fast8_t ordered;
356 uint_fast32_t t, used_entries=0;
357 uint_fast32_t entries;
359 AV_DEBUG(" %d. Codebook \n", cb);
361 if (get_bits(gb, 24)!=0x564342) {
362 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
366 codebook_setup->dimensions=get_bits(gb, 16);
367 if (codebook_setup->dimensions>16) {
368 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
371 entries=get_bits(gb, 24);
372 if (entries>V_MAX_VLCS) {
373 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
377 ordered=get_bits1(gb);
379 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
384 uint_fast8_t sparse=get_bits1(gb);
386 AV_DEBUG(" not ordered \n");
389 AV_DEBUG(" sparse \n");
392 for(ce=0;ce<entries;++ce) {
395 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
398 else tmp_vlc_bits[ce]=0;
401 AV_DEBUG(" not sparse \n");
403 used_entries=entries;
404 for(ce=0;ce<entries;++ce) {
405 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
409 uint_fast16_t current_entry=0;
410 uint_fast8_t current_length=get_bits(gb, 5)+1;
412 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
414 used_entries=entries;
415 for(;current_entry<used_entries;++current_length) {
416 uint_fast16_t i, number;
418 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
420 number=get_bits(gb, ilog(entries - current_entry));
422 AV_DEBUG(" number: %d \n", number);
424 for(i=current_entry;i<number+current_entry;++i) {
425 if (i<used_entries) tmp_vlc_bits[i]=current_length;
428 current_entry+=number;
430 if (current_entry>used_entries) {
431 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
436 codebook_setup->lookup_type=get_bits(gb, 4);
438 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
440 // If the codebook is used for (inverse) VQ, calculate codevectors.
442 if (codebook_setup->lookup_type==1) {
443 uint_fast16_t i, j, k;
444 uint_fast16_t codebook_lookup_values=ff_vorbis_nth_root(entries, codebook_setup->dimensions);
445 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
447 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
448 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
449 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
450 uint_fast8_t codebook_sequence_p=get_bits1(gb);
452 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
453 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
455 for(i=0;i<codebook_lookup_values;++i) {
456 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
458 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
459 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
462 // Weed out unused vlcs and build codevector vector
463 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
464 for(j=0, i=0;i<entries;++i) {
465 uint_fast8_t dim=codebook_setup->dimensions;
467 if (tmp_vlc_bits[i]) {
469 uint_fast32_t lookup_offset=i;
472 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
476 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
477 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
478 if (codebook_sequence_p) {
479 last=codebook_setup->codevectors[j*dim+k];
481 lookup_offset/=codebook_lookup_values;
483 tmp_vlc_bits[j]=tmp_vlc_bits[i];
486 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
488 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
490 av_log(vc->avccontext, AV_LOG_INFO, "\n");
496 if (j!=used_entries) {
497 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
500 entries=used_entries;
502 else if (codebook_setup->lookup_type>=2) {
503 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
507 // Initialize VLC table
508 if (ff_vorbis_len2vlc(tmp_vlc_bits, tmp_vlc_codes, entries)) {
509 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
512 codebook_setup->maxdepth=0;
513 for(t=0;t<entries;++t)
514 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
516 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
517 else codebook_setup->nb_bits=V_NB_BITS;
519 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
521 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)) {
522 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
527 av_free(tmp_vlc_bits);
528 av_free(tmp_vlc_codes);
533 av_free(tmp_vlc_bits);
534 av_free(tmp_vlc_codes);
538 // Process time domain transforms part (unused in Vorbis I)
540 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
541 GetBitContext *gb=&vc->gb;
543 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
545 for(i=0;i<vorbis_time_count;++i) {
546 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
548 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
550 if (vorbis_tdtransform) {
551 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
558 // Process floors part
560 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
561 vorbis_floor_data *vfu, float *vec);
562 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
563 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
564 vorbis_floor_data *vfu, float *vec);
565 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
566 GetBitContext *gb=&vc->gb;
569 vc->floor_count=get_bits(gb, 6)+1;
571 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
573 for (i=0;i<vc->floor_count;++i) {
574 vorbis_floor *floor_setup=&vc->floors[i];
576 floor_setup->floor_type=get_bits(gb, 16);
578 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
580 if (floor_setup->floor_type==1) {
581 uint_fast8_t maximum_class=0;
582 uint_fast8_t rangebits;
583 uint_fast16_t floor1_values=2;
585 floor_setup->decode=vorbis_floor1_decode;
587 floor_setup->data.t1.partitions=get_bits(gb, 5);
589 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
591 for(j=0;j<floor_setup->data.t1.partitions;++j) {
592 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
593 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
595 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
599 AV_DEBUG(" maximum class %d \n", maximum_class);
601 floor_setup->data.t1.maximum_class=maximum_class;
603 for(j=0;j<=maximum_class;++j) {
604 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
605 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
607 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]);
609 if (floor_setup->data.t1.class_subclasses[j]) {
610 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
612 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
615 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
616 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
618 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
622 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
623 floor_setup->data.t1.x_list_dim=2;
625 for(j=0;j<floor_setup->data.t1.partitions;++j) {
626 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
629 floor_setup->data.t1.list=(floor1_entry_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(floor1_entry_t));
632 rangebits=get_bits(gb, 4);
633 floor_setup->data.t1.list[0].x = 0;
634 floor_setup->data.t1.list[1].x = (1<<rangebits);
636 for(j=0;j<floor_setup->data.t1.partitions;++j) {
637 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
638 floor_setup->data.t1.list[floor1_values].x=get_bits(gb, rangebits);
640 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.list[floor1_values].x);
644 // Precalculate order of x coordinates - needed for decode
645 ff_vorbis_ready_floor1_list(floor_setup->data.t1.list, floor_setup->data.t1.x_list_dim);
647 else if(floor_setup->floor_type==0) {
648 uint_fast8_t max_codebook_dim=0;
650 floor_setup->decode=vorbis_floor0_decode;
652 floor_setup->data.t0.order=get_bits(gb, 8);
653 floor_setup->data.t0.rate=get_bits(gb, 16);
654 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
655 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
656 /* zero would result in a div by zero later *
658 if (floor_setup->data.t0.amplitude_bits == 0) {
659 av_log(vc->avccontext, AV_LOG_ERROR,
660 "Floor 0 amplitude bits is 0.\n");
663 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
664 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
666 /* allocate mem for booklist */
667 floor_setup->data.t0.book_list=
668 av_malloc(floor_setup->data.t0.num_books);
669 if(!floor_setup->data.t0.book_list) { return 1; }
670 /* read book indexes */
673 uint_fast8_t book_idx;
674 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
675 book_idx=get_bits(gb, 8);
676 floor_setup->data.t0.book_list[idx]=book_idx;
677 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
678 max_codebook_dim=vc->codebooks[book_idx].dimensions;
680 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
687 /* allocate mem for lsp coefficients */
689 /* codebook dim is for padding if codebook dim doesn't *
690 * divide order+1 then we need to read more data */
691 floor_setup->data.t0.lsp=
692 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
694 if(!floor_setup->data.t0.lsp) { return 1; }
697 #ifdef V_DEBUG /* debug output parsed headers */
698 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
699 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
700 AV_DEBUG("floor0 bark map size: %u\n",
701 floor_setup->data.t0.bark_map_size);
702 AV_DEBUG("floor0 amplitude bits: %u\n",
703 floor_setup->data.t0.amplitude_bits);
704 AV_DEBUG("floor0 amplitude offset: %u\n",
705 floor_setup->data.t0.amplitude_offset);
706 AV_DEBUG("floor0 number of books: %u\n",
707 floor_setup->data.t0.num_books);
708 AV_DEBUG("floor0 book list pointer: %p\n",
709 floor_setup->data.t0.book_list);
712 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
713 AV_DEBUG( " Book %d: %u\n",
715 floor_setup->data.t0.book_list[idx] );
721 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
728 // Process residues part
730 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
731 GetBitContext *gb=&vc->gb;
732 uint_fast8_t i, j, k;
734 vc->residue_count=get_bits(gb, 6)+1;
735 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
737 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
739 for(i=0;i<vc->residue_count;++i) {
740 vorbis_residue *res_setup=&vc->residues[i];
741 uint_fast8_t cascade[64];
742 uint_fast8_t high_bits;
743 uint_fast8_t low_bits;
745 res_setup->type=get_bits(gb, 16);
747 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
749 res_setup->begin=get_bits(gb, 24);
750 res_setup->end=get_bits(gb, 24);
751 res_setup->partition_size=get_bits(gb, 24)+1;
752 res_setup->classifications=get_bits(gb, 6)+1;
753 res_setup->classbook=get_bits(gb, 8);
755 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,
756 res_setup->classifications, res_setup->classbook);
758 for(j=0;j<res_setup->classifications;++j) {
760 low_bits=get_bits(gb, 3);
762 high_bits=get_bits(gb, 5);
764 cascade[j]=(high_bits<<3)+low_bits;
766 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
769 res_setup->maxpass=0;
770 for(j=0;j<res_setup->classifications;++j) {
772 if (cascade[j]&(1<<k)) {
773 res_setup->books[j][k]=get_bits(gb, 8);
775 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
777 if (k>res_setup->maxpass) {
778 res_setup->maxpass=k;
781 res_setup->books[j][k]=-1;
789 // Process mappings part
791 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
792 GetBitContext *gb=&vc->gb;
795 vc->mapping_count=get_bits(gb, 6)+1;
796 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
798 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
800 for(i=0;i<vc->mapping_count;++i) {
801 vorbis_mapping *mapping_setup=&vc->mappings[i];
803 if (get_bits(gb, 16)) {
804 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
808 mapping_setup->submaps=get_bits(gb, 4)+1;
810 mapping_setup->submaps=1;
814 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
815 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
816 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
817 for(j=0;j<mapping_setup->coupling_steps;++j) {
818 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
819 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
820 // FIXME: sanity checks
823 mapping_setup->coupling_steps=0;
826 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
828 if(get_bits(gb, 2)) {
829 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
830 return 1; // following spec.
833 if (mapping_setup->submaps>1) {
834 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
835 for(j=0;j<vc->audio_channels;++j) {
836 mapping_setup->mux[j]=get_bits(gb, 4);
840 for(j=0;j<mapping_setup->submaps;++j) {
841 get_bits(gb, 8); // FIXME check?
842 mapping_setup->submap_floor[j]=get_bits(gb, 8);
843 mapping_setup->submap_residue[j]=get_bits(gb, 8);
845 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
851 // Process modes part
853 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
855 vorbis_floor * floors=vc->floors;
858 int_fast8_t blockflag;
860 int_fast32_t n; //TODO: could theoretically be smaller?
862 for (blockflag=0;blockflag<2;++blockflag)
864 n=vc->blocksize[blockflag]/2;
865 floors[floor_number].data.t0.map[blockflag]=
866 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
868 map=floors[floor_number].data.t0.map[blockflag];
869 vf=&floors[floor_number].data.t0;
871 for (idx=0; idx<n;++idx) {
872 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
873 ((vf->bark_map_size)/
874 BARK(vf->rate/2.0f )) );
875 if (vf->bark_map_size-1 < map[idx]) {
876 map[idx]=vf->bark_map_size-1;
880 vf->map_size[blockflag]=n;
884 for(idx=0;idx<=n;++idx) {
885 AV_DEBUG("floor0 map: map at pos %d is %d\n",
891 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
892 GetBitContext *gb=&vc->gb;
895 vc->mode_count=get_bits(gb, 6)+1;
896 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
898 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
900 for(i=0;i<vc->mode_count;++i) {
901 vorbis_mode *mode_setup=&vc->modes[i];
903 mode_setup->blockflag=get_bits(gb, 1);
904 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
905 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
906 mode_setup->mapping=get_bits(gb, 8); //FIXME check
908 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);
913 // Process the whole setup header using the functions above
915 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
916 GetBitContext *gb=&vc->gb;
918 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
919 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
920 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
921 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
925 if (vorbis_parse_setup_hdr_codebooks(vc)) {
926 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
929 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
930 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
933 if (vorbis_parse_setup_hdr_floors(vc)) {
934 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
937 if (vorbis_parse_setup_hdr_residues(vc)) {
938 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
941 if (vorbis_parse_setup_hdr_mappings(vc)) {
942 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
945 if (vorbis_parse_setup_hdr_modes(vc)) {
946 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
949 if (!get_bits1(gb)) {
950 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
951 return 8; // framing flag bit unset error
957 // Process the identification header
959 static int vorbis_parse_id_hdr(vorbis_context *vc){
960 GetBitContext *gb=&vc->gb;
961 uint_fast8_t bl0, bl1;
963 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
964 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
965 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
966 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
970 vc->version=get_bits_long(gb, 32); //FIXME check 0
971 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
972 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
973 vc->bitrate_maximum=get_bits_long(gb, 32);
974 vc->bitrate_nominal=get_bits_long(gb, 32);
975 vc->bitrate_minimum=get_bits_long(gb, 32);
978 vc->blocksize[0]=(1<<bl0);
979 vc->blocksize[1]=(1<<bl1);
980 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
981 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
984 // output format int16
985 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
986 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
987 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
988 "output packets too large.\n");
991 vc->win[0]=ff_vorbis_vwin[bl0-6];
992 vc->win[1]=ff_vorbis_vwin[bl1-6];
997 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
998 for(i=0; i<vc->blocksize[j]/2; i++)
999 win[i] = vc->win[j][i] * (1<<15);
1004 if ((get_bits1(gb)) == 0) {
1005 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1009 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1010 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1011 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1012 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1013 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1014 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1017 ff_mdct_init(&vc->mdct[0], bl0, 1);
1018 ff_mdct_init(&vc->mdct[1], bl1, 1);
1020 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 ",
1021 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1024 BLK=vc->blocksize[0];
1025 for(i=0;i<BLK/2;++i) {
1026 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)));
1033 // Process the extradata using the functions above (identification header, setup header)
1035 static int vorbis_decode_init(AVCodecContext *avccontext) {
1036 vorbis_context *vc = avccontext->priv_data ;
1037 uint8_t *headers = avccontext->extradata;
1038 int headers_len=avccontext->extradata_size;
1039 uint8_t *header_start[3];
1041 GetBitContext *gb = &(vc->gb);
1044 vc->avccontext = avccontext;
1045 dsputil_init(&vc->dsp, avccontext);
1047 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
1052 vc->exp_bias = 15<<23;
1056 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1060 if(headers[0] == 0 && headers[1] == 30) {
1061 for(i = 0; i < 3; i++){
1062 header_len[i] = *headers++ << 8;
1063 header_len[i] += *headers++;
1064 header_start[i] = headers;
1065 headers += header_len[i];
1067 } else if(headers[0] == 2) {
1068 for(j=1,i=0;i<2;++i, ++j) {
1070 while(j<headers_len && headers[j]==0xff) {
1071 header_len[i]+=0xff;
1074 if (j>=headers_len) {
1075 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1078 header_len[i]+=headers[j];
1080 header_len[2]=headers_len-header_len[0]-header_len[1]-j;
1082 header_start[0] = headers;
1083 header_start[1] = header_start[0] + header_len[0];
1084 header_start[2] = header_start[1] + header_len[1];
1086 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1090 init_get_bits(gb, header_start[0], header_len[0]*8);
1091 hdr_type=get_bits(gb, 8);
1093 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1096 if (vorbis_parse_id_hdr(vc)) {
1097 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1102 init_get_bits(gb, header_start[2], header_len[2]*8);
1103 hdr_type=get_bits(gb, 8);
1105 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1108 if (vorbis_parse_setup_hdr(vc)) {
1109 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1114 avccontext->channels = vc->audio_channels;
1115 avccontext->sample_rate = vc->audio_samplerate;
1120 // Decode audiopackets -------------------------------------------------
1122 // Read and decode floor
1124 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1125 vorbis_floor_data *vfu, float *vec) {
1126 vorbis_floor0 * vf=&vfu->t0;
1127 float * lsp=vf->lsp;
1128 uint_fast32_t amplitude;
1129 uint_fast32_t book_idx;
1130 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1132 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1135 uint_fast16_t lsp_len = 0;
1137 vorbis_codebook codebook;
1139 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1140 if ( book_idx >= vf->num_books ) {
1141 av_log( vc->avccontext, AV_LOG_ERROR,
1142 "floor0 dec: booknumber too high!\n" );
1145 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1146 codebook=vc->codebooks[vf->book_list[book_idx]];
1148 while (lsp_len<vf->order) {
1151 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1152 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1153 /* read temp vector */
1154 vec_off=get_vlc2(&vc->gb,
1157 codebook.maxdepth ) *
1158 codebook.dimensions;
1159 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1160 /* copy each vector component and add last to it */
1161 for (idx=0; idx<codebook.dimensions; ++idx) {
1162 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1164 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1166 lsp_len += codebook.dimensions;
1169 /* DEBUG: output lsp coeffs */
1172 for ( idx = 0; idx < lsp_len; ++idx )
1173 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1177 /* synthesize floor output vector */
1180 int order=vf->order;
1181 float wstep=M_PI/vf->bark_map_size;
1183 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1185 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1186 vf->map_size, order, wstep);
1189 while(i<vf->map_size[blockflag]) {
1190 int j, iter_cond=vf->map[blockflag][i];
1193 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1195 /* similar part for the q and p products */
1196 for(j=0;j<order;j+=2) {
1197 q *= lsp[j] -two_cos_w;
1198 p *= lsp[j+1]-two_cos_w;
1200 if(j==order) { // even order
1201 p *= p*(2.0f-two_cos_w);
1202 q *= q*(2.0f+two_cos_w);
1205 q *= two_cos_w-lsp[j]; // one more time for q
1207 /* final step and square */
1208 p *= p*(4.f-two_cos_w*two_cos_w);
1212 /* calculate linear floor value */
1215 ( (amplitude*vf->amplitude_offset)/
1216 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1217 - vf->amplitude_offset ) * .11512925f
1222 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1227 /* this channel is unused */
1231 AV_DEBUG(" Floor0 decoded\n");
1236 static void render_line(int x0, int y0, int x1, int y1, float * buf, int n) {
1240 int base = dy / adx;
1245 if (dy < 0) sy = base - 1;
1247 ady = ady - ABS(base) * adx;
1249 buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1250 for (x = x0 + 1; x < x1; x++) {
1259 buf[x] = ff_vorbis_floor1_inverse_db_table[y];
1263 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) {
1266 ly = y_list[0] * multiplier;
1267 for (i = 1; i < values; i++) {
1268 int pos = list[i].sort;
1270 render_line(lx, ly, list[pos].x, y_list[pos] * multiplier, out, samples);
1272 ly = y_list[pos] * multiplier;
1274 if (lx >= samples) break;
1276 if (lx < samples) render_line(lx, ly, samples, ly, out, samples);
1279 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1280 vorbis_floor1 * vf=&vfu->t1;
1281 GetBitContext *gb=&vc->gb;
1282 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1283 uint_fast16_t range=range_v[vf->multiplier-1];
1284 uint_fast16_t floor1_Y[vf->x_list_dim];
1285 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1286 int floor1_flag[vf->x_list_dim];
1287 uint_fast8_t class_;
1293 uint_fast16_t offset;
1295 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1296 int_fast16_t dy, err;
1299 if (!get_bits1(gb)) return 1; // silence
1301 // Read values (or differences) for the floor's points
1303 floor1_Y[0]=get_bits(gb, ilog(range-1));
1304 floor1_Y[1]=get_bits(gb, ilog(range-1));
1306 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1309 for(i=0;i<vf->partitions;++i) {
1310 class_=vf->partition_class[i];
1311 cdim=vf->class_dimensions[class_];
1312 cbits=vf->class_subclasses[class_];
1316 AV_DEBUG("Cbits %d \n", cbits);
1318 if (cbits) { // this reads all subclasses for this partition's class
1319 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1320 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1323 for(j=0;j<cdim;++j) {
1324 book=vf->subclass_books[class_][cval & csub];
1326 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1330 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1331 vc->codebooks[book].nb_bits, 3);
1333 floor1_Y[offset+j]=0;
1336 AV_DEBUG(" floor(%d) = %d \n", vf->list[offset+j].x, floor1_Y[offset+j]);
1341 // Amplitude calculation from the differences
1345 floor1_Y_final[0]=floor1_Y[0];
1346 floor1_Y_final[1]=floor1_Y[1];
1348 for(i=2;i<vf->x_list_dim;++i) {
1349 uint_fast16_t val, highroom, lowroom, room;
1350 uint_fast16_t high_neigh_offs;
1351 uint_fast16_t low_neigh_offs;
1353 low_neigh_offs=vf->list[i].low;
1354 high_neigh_offs=vf->list[i].high;
1355 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1356 adx=vf->list[high_neigh_offs].x-vf->list[low_neigh_offs].x;
1358 err=ady*(vf->list[i].x-vf->list[low_neigh_offs].x);
1359 off=(int16_t)err/(int16_t)adx;
1361 predicted=floor1_Y_final[low_neigh_offs]-off;
1363 predicted=floor1_Y_final[low_neigh_offs]+off;
1364 } // render_point end
1367 highroom=range-predicted;
1369 if (highroom < lowroom) {
1372 room=lowroom*2; // SPEC mispelling
1375 floor1_flag[low_neigh_offs]=1;
1376 floor1_flag[high_neigh_offs]=1;
1379 if (highroom > lowroom) {
1380 floor1_Y_final[i]=val-lowroom+predicted;
1382 floor1_Y_final[i]=predicted-val+highroom-1;
1386 floor1_Y_final[i]=predicted-(val+1)/2;
1388 floor1_Y_final[i]=predicted+val/2;
1393 floor1_Y_final[i]=predicted;
1396 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->list[i].x, floor1_Y_final[i], val);
1399 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1401 ff_vorbis_floor1_render_list(vf->list, vf->x_list_dim, floor1_Y_final, floor1_flag, vf->multiplier, vec, vf->list[1].x);
1403 AV_DEBUG(" Floor decoded\n");
1408 // Read and decode residue
1410 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) {
1411 GetBitContext *gb=&vc->gb;
1412 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1413 uint_fast16_t n_to_read=vr->end-vr->begin;
1414 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1415 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1417 uint_fast8_t ch_used;
1423 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1425 if (do_not_decode[0]) return 0;
1431 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1433 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1434 uint_fast16_t voffset;
1435 uint_fast16_t partition_count;
1436 uint_fast16_t j_times_ptns_to_read;
1439 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1441 uint_fast32_t inverse_class = inverse[vr->classifications];
1442 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1443 if (!do_not_decode[j]) {
1444 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1445 vc->codebooks[vr->classbook].nb_bits, 3);
1447 AV_DEBUG("Classword: %d \n", temp);
1449 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1450 for(i=0;i<c_p_c;++i) {
1451 uint_fast32_t temp2;
1453 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1454 if (partition_count+c_p_c-1-i < ptns_to_read) {
1455 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1460 j_times_ptns_to_read+=ptns_to_read;
1463 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1464 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1465 uint_fast16_t voffs;
1467 if (!do_not_decode[j]) {
1468 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1469 int_fast16_t vqbook=vr->books[vqclass][pass];
1472 uint_fast16_t coffs;
1473 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1474 uint_fast16_t step= dim==1 ? vr->partition_size
1475 : FASTDIV(vr->partition_size, dim);
1476 vorbis_codebook codebook= vc->codebooks[vqbook];
1480 voffs=voffset+j*vlen;
1481 for(k=0;k<step;++k) {
1482 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1483 for(l=0;l<dim;++l) {
1484 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1488 else if (vr->type==1) {
1489 voffs=voffset+j*vlen;
1490 for(k=0;k<step;++k) {
1491 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1492 for(l=0;l<dim;++l, ++voffs) {
1493 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1495 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1499 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1503 for(k=0;k<step;++k) {
1504 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1505 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1506 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1509 for(k=0;k<step;++k) {
1510 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1511 for(l=0;l<dim;l+=2, voffs++) {
1512 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1513 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1515 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);
1520 else if (vr->type==2) {
1523 for(k=0;k<step;++k) {
1524 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1525 for(l=0;l<dim;++l, ++voffs) {
1526 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1528 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);
1532 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1537 j_times_ptns_to_read+=ptns_to_read;
1540 voffset+=vr->partition_size;
1547 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1550 for(i=0; i<blocksize; i++)
1554 ang[i]=mag[i]-ang[i];
1572 // Decode the audio packet using the functions above
1574 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1575 GetBitContext *gb=&vc->gb;
1577 uint_fast8_t previous_window=0,next_window=0;
1578 uint_fast8_t mode_number;
1579 uint_fast16_t blocksize;
1581 uint_fast8_t no_residue[vc->audio_channels];
1582 uint_fast8_t do_not_decode[vc->audio_channels];
1583 vorbis_mapping *mapping;
1584 float *ch_res_ptr=vc->channel_residues;
1585 float *ch_floor_ptr=vc->channel_floors;
1586 uint_fast8_t res_chan[vc->audio_channels];
1587 uint_fast8_t res_num=0;
1588 int_fast16_t retlen=0;
1589 uint_fast16_t saved_start=0;
1590 float fadd_bias = vc->add_bias;
1592 if (get_bits1(gb)) {
1593 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1594 return -1; // packet type not audio
1597 if (vc->mode_count==1) {
1600 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1602 vc->mode_number=mode_number;
1603 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1605 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1607 if (vc->modes[mode_number].blockflag) {
1608 previous_window=get_bits1(gb);
1609 next_window=get_bits1(gb);
1612 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1613 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1614 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1618 for(i=0;i<vc->audio_channels;++i) {
1619 vorbis_floor *floor;
1620 if (mapping->submaps>1) {
1621 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1623 floor=&vc->floors[mapping->submap_floor[0]];
1626 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1627 ch_floor_ptr+=blocksize/2;
1630 // Nonzero vector propagate
1632 for(i=mapping->coupling_steps-1;i>=0;--i) {
1633 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1634 no_residue[mapping->magnitude[i]]=0;
1635 no_residue[mapping->angle[i]]=0;
1641 for(i=0;i<mapping->submaps;++i) {
1642 vorbis_residue *residue;
1645 for(j=0;j<vc->audio_channels;++j) {
1646 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1647 res_chan[j]=res_num;
1648 if (no_residue[j]) {
1649 do_not_decode[ch]=1;
1651 do_not_decode[ch]=0;
1657 residue=&vc->residues[mapping->submap_residue[i]];
1658 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1660 ch_res_ptr+=ch*blocksize/2;
1665 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1668 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1669 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1670 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1675 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1676 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1677 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1680 // MDCT, overlap/add, save data for next overlapping FPMATH
1682 for(j=0;j<vc->audio_channels;++j) {
1683 uint_fast8_t step=vc->audio_channels;
1685 float *saved=vc->saved+j*vc->blocksize[1]/2;
1687 const float *lwin=vc->win[1];
1688 const float *swin=vc->win[0];
1690 float *buf_tmp=vc->buf_tmp;
1692 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1694 saved_start=vc->saved_start;
1696 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1698 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1699 if (vc->modes[mode_number].blockflag) {
1701 if (previous_window) {
1702 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1703 retlen=vc->blocksize[1]/2;
1705 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1707 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1708 k = vc->blocksize[0]/2*step + j;
1709 buf += vc->blocksize[0]/2;
1711 for(i=0; i<len; i++, k+=step)
1712 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1714 for(i=0; i<len; i++, k+=step)
1715 ret[k] = buf[i] + fadd_bias;
1718 retlen=vc->blocksize[0]/2+len;
1722 buf += vc->blocksize[1]/2;
1723 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1726 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1727 buf += vc->blocksize[1]/2;
1728 for(i=0; i<saved_start; i++)
1729 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1730 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1735 for(k=j, i=0;i<saved_start;++i, k+=step)
1736 ret[k] = saved[i] + fadd_bias;
1738 for(k=j, i=0;i<saved_start;++i, k+=step)
1741 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1742 retlen=saved_start+vc->blocksize[0]/2;
1744 buf += vc->blocksize[0]/2;
1745 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1749 vc->saved_start=saved_start;
1751 return retlen*vc->audio_channels;
1754 // Return the decoded audio packet through the standard api
1756 static int vorbis_decode_frame(AVCodecContext *avccontext,
1757 void *data, int *data_size,
1758 uint8_t *buf, int buf_size)
1760 vorbis_context *vc = avccontext->priv_data ;
1761 GetBitContext *gb = &(vc->gb);
1769 AV_DEBUG("packet length %d \n", buf_size);
1771 init_get_bits(gb, buf, buf_size*8);
1773 len=vorbis_parse_audio_packet(vc);
1780 if (!vc->first_frame) {
1786 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1788 vc->dsp.float_to_int16(data, vc->ret, len);
1796 static int vorbis_decode_close(AVCodecContext *avccontext) {
1797 vorbis_context *vc = avccontext->priv_data;
1804 AVCodec vorbis_decoder = {
1808 sizeof(vorbis_context),
1811 vorbis_decode_close,
1812 vorbis_decode_frame,