4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
28 #define ALT_BITSTREAM_READER_LE
30 #include "bitstream.h"
37 #define V_MAX_VLCS (1<<16)
46 /* Helper functions */
49 * reads 0-32 bits when using the ALT_BITSTREAM_READER_LE bitstream reader
51 static unsigned int get_bits_long_le(GetBitContext *s, int n){
52 if(n<=17) return get_bits(s, n);
54 int ret= get_bits(s, 16);
55 return ret | (get_bits(s, n-16) << 16);
59 #define ilog(i) av_log2(2*(i))
62 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
64 static unsigned int nth_root(unsigned int x, unsigned int n) { // x^(1/n)
65 unsigned int ret=0, i, j;
69 for(i=0,j=ret;i<n-1;i++) j*=ret;
75 static float vorbisfloat2float(uint_fast32_t val) {
76 double mant=val&0x1fffff;
77 long exp=(val&0x7fe00000L)>>21;
78 if (val&0x80000000) mant=-mant;
79 return(ldexp(mant, exp-20-768));
83 // Generate vlc codes from vorbis huffman code lengths
85 static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num) {
86 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
87 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
96 for(p=0;(bits[p]==0) && (p<num);++p);
98 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
103 for(i=0;i<bits[p];++i) {
104 exit_at_level[i+1]=1<<i;
108 av_log(vc->avccontext, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
109 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
110 for(i=0;i<bits[p];++i) {
111 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
113 av_log(vc->avccontext, AV_LOG_INFO, "\n");
119 if (bits[p]==0) continue;
120 // find corresponding exit(node which the tree can grow further from)
121 for(i=bits[p];i>0;--i) {
122 if (exit_at_level[i]) break;
124 if (!i) return 1; // overspecified tree
125 code=exit_at_level[i];
127 // construct code (append 0s to end) and introduce new exits
128 for(j=i+1;j<=bits[p];++j) {
129 exit_at_level[j]=code+(1<<(j-1));
134 av_log(vc->avccontext, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
135 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
136 for(i=0;i<bits[p];++i) {
137 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
139 av_log(vc->avccontext, AV_LOG_INFO, "\n");
144 //FIXME no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
149 // Free all allocated memory -----------------------------------------
151 static void vorbis_free(vorbis_context *vc) {
154 av_freep(&vc->channel_residues);
155 av_freep(&vc->channel_floors);
156 av_freep(&vc->saved);
159 av_freep(&vc->buf_tmp);
161 av_freep(&vc->residues);
162 av_freep(&vc->modes);
164 ff_mdct_end(&vc->mdct[0]);
165 ff_mdct_end(&vc->mdct[1]);
167 for(i=0;i<vc->codebook_count;++i) {
168 av_free(vc->codebooks[i].codevectors);
169 free_vlc(&vc->codebooks[i].vlc);
171 av_freep(&vc->codebooks);
173 for(i=0;i<vc->floor_count;++i) {
174 if(vc->floors[i].floor_type==0) {
175 av_free(vc->floors[i].data.t0.map[0]);
176 av_free(vc->floors[i].data.t0.map[1]);
177 av_free(vc->floors[i].data.t0.book_list);
178 av_free(vc->floors[i].data.t0.lsp);
181 av_free(vc->floors[i].data.t1.x_list);
182 av_free(vc->floors[i].data.t1.x_list_order);
183 av_free(vc->floors[i].data.t1.low_neighbour);
184 av_free(vc->floors[i].data.t1.high_neighbour);
187 av_freep(&vc->floors);
189 for(i=0;i<vc->mapping_count;++i) {
190 av_free(vc->mappings[i].magnitude);
191 av_free(vc->mappings[i].angle);
192 av_free(vc->mappings[i].mux);
194 av_freep(&vc->mappings);
197 av_freep(&vc->win[0]);
198 av_freep(&vc->win[1]);
202 // Parse setup header -------------------------------------------------
204 // Process codebooks part
206 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
208 uint_fast8_t *tmp_vlc_bits;
209 uint_fast32_t *tmp_vlc_codes;
210 GetBitContext *gb=&vc->gb;
212 vc->codebook_count=get_bits(gb,8)+1;
214 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
216 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
217 tmp_vlc_bits=(uint_fast8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast8_t));
218 tmp_vlc_codes=(uint_fast32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast32_t));
220 for(cb=0;cb<vc->codebook_count;++cb) {
221 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
222 uint_fast8_t ordered;
223 uint_fast32_t t, used_entries=0;
224 uint_fast32_t entries;
226 AV_DEBUG(" %d. Codebook \n", cb);
228 if (get_bits(gb, 24)!=0x564342) {
229 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
233 codebook_setup->dimensions=get_bits(gb, 16);
234 if (codebook_setup->dimensions>16) {
235 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
238 entries=get_bits(gb, 24);
239 if (entries>V_MAX_VLCS) {
240 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
244 ordered=get_bits1(gb);
246 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
251 uint_fast8_t sparse=get_bits1(gb);
253 AV_DEBUG(" not ordered \n");
256 AV_DEBUG(" sparse \n");
259 for(ce=0;ce<entries;++ce) {
262 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
265 else tmp_vlc_bits[ce]=0;
268 AV_DEBUG(" not sparse \n");
270 used_entries=entries;
271 for(ce=0;ce<entries;++ce) {
272 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
276 uint_fast16_t current_entry=0;
277 uint_fast8_t current_length=get_bits(gb, 5)+1;
279 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
281 used_entries=entries;
282 for(;current_entry<used_entries;++current_length) {
283 uint_fast16_t i, number;
285 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
287 number=get_bits(gb, ilog(entries - current_entry));
289 AV_DEBUG(" number: %d \n", number);
291 for(i=current_entry;i<number+current_entry;++i) {
292 if (i<used_entries) tmp_vlc_bits[i]=current_length;
295 current_entry+=number;
297 if (current_entry>used_entries) {
298 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
303 codebook_setup->lookup_type=get_bits(gb, 4);
305 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
307 // If the codebook is used for (inverse) VQ, calculate codevectors.
309 if (codebook_setup->lookup_type==1) {
310 uint_fast16_t i, j, k;
311 uint_fast16_t codebook_lookup_values=nth_root(entries, codebook_setup->dimensions);
312 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
314 float codebook_minimum_value=vorbisfloat2float(get_bits_long_le(gb, 32));
315 float codebook_delta_value=vorbisfloat2float(get_bits_long_le(gb, 32));
316 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
317 uint_fast8_t codebook_sequence_p=get_bits1(gb);
319 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
320 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
322 for(i=0;i<codebook_lookup_values;++i) {
323 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
325 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
326 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
329 // Weed out unused vlcs and build codevector vector
330 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
331 for(j=0, i=0;i<entries;++i) {
332 uint_fast8_t dim=codebook_setup->dimensions;
334 if (tmp_vlc_bits[i]) {
336 uint_fast32_t lookup_offset=i;
339 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
343 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
344 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
345 if (codebook_sequence_p) {
346 last=codebook_setup->codevectors[j*dim+k];
348 lookup_offset/=codebook_lookup_values;
350 tmp_vlc_bits[j]=tmp_vlc_bits[i];
353 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
355 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
357 av_log(vc->avccontext, AV_LOG_INFO, "\n");
363 if (j!=used_entries) {
364 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
367 entries=used_entries;
369 else if (codebook_setup->lookup_type>=2) {
370 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
374 // Initialize VLC table
375 if (vorbis_len2vlc(vc, tmp_vlc_bits, tmp_vlc_codes, entries)) {
376 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
379 codebook_setup->maxdepth=0;
380 for(t=0;t<entries;++t)
381 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
383 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
384 else codebook_setup->nb_bits=V_NB_BITS;
386 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
388 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)) {
389 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
394 av_free(tmp_vlc_bits);
395 av_free(tmp_vlc_codes);
400 av_free(tmp_vlc_bits);
401 av_free(tmp_vlc_codes);
405 // Process time domain transforms part (unused in Vorbis I)
407 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
408 GetBitContext *gb=&vc->gb;
410 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
412 for(i=0;i<vorbis_time_count;++i) {
413 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
415 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
417 if (vorbis_tdtransform) {
418 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
425 // Process floors part
427 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
428 vorbis_floor_data *vfu, float *vec);
429 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
430 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
431 vorbis_floor_data *vfu, float *vec);
432 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
433 GetBitContext *gb=&vc->gb;
436 vc->floor_count=get_bits(gb, 6)+1;
438 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
440 for (i=0;i<vc->floor_count;++i) {
441 vorbis_floor *floor_setup=&vc->floors[i];
443 floor_setup->floor_type=get_bits(gb, 16);
445 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
447 if (floor_setup->floor_type==1) {
448 uint_fast8_t maximum_class=0;
449 uint_fast8_t rangebits;
450 uint_fast16_t floor1_values=2;
452 floor_setup->decode=vorbis_floor1_decode;
454 floor_setup->data.t1.partitions=get_bits(gb, 5);
456 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
458 for(j=0;j<floor_setup->data.t1.partitions;++j) {
459 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
460 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
462 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
466 AV_DEBUG(" maximum class %d \n", maximum_class);
468 floor_setup->data.t1.maximum_class=maximum_class;
470 for(j=0;j<=maximum_class;++j) {
471 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
472 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
474 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]);
476 if (floor_setup->data.t1.class_subclasses[j]) {
477 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
479 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
482 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
483 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
485 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
489 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
490 floor_setup->data.t1.x_list_dim=2;
492 for(j=0;j<floor_setup->data.t1.partitions;++j) {
493 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
496 floor_setup->data.t1.x_list=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
497 floor_setup->data.t1.x_list_order=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
498 floor_setup->data.t1.low_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
499 floor_setup->data.t1.high_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
502 rangebits=get_bits(gb, 4);
503 floor_setup->data.t1.x_list[0] = 0;
504 floor_setup->data.t1.x_list[1] = (1<<rangebits);
506 for(j=0;j<floor_setup->data.t1.partitions;++j) {
507 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
508 floor_setup->data.t1.x_list[floor1_values]=get_bits(gb, rangebits);
510 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.x_list[floor1_values]);
514 // Precalculate order of x coordinates - needed for decode
516 for(k=0;k<floor_setup->data.t1.x_list_dim;++k) {
517 floor_setup->data.t1.x_list_order[k]=k;
520 for(k=0;k<floor_setup->data.t1.x_list_dim-1;++k) { // FIXME optimize sorting ?
521 for(j=k+1;j<floor_setup->data.t1.x_list_dim;++j) {
522 if(floor_setup->data.t1.x_list[floor_setup->data.t1.x_list_order[k]]>floor_setup->data.t1.x_list[floor_setup->data.t1.x_list_order[j]]) {
523 uint_fast16_t tmp=floor_setup->data.t1.x_list_order[k];
524 floor_setup->data.t1.x_list_order[k]=floor_setup->data.t1.x_list_order[j];
525 floor_setup->data.t1.x_list_order[j]=tmp;
530 // Precalculate low and high neighbours
532 for(k=2;k<floor_setup->data.t1.x_list_dim;++k) {
533 floor_setup->data.t1.low_neighbour[k]=0;
534 floor_setup->data.t1.high_neighbour[k]=1; // correct according to SPEC requirements
537 if ((floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[k]) &&
538 (floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[floor_setup->data.t1.low_neighbour[k]])) {
539 floor_setup->data.t1.low_neighbour[k]=j;
541 if ((floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[k]) &&
542 (floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[floor_setup->data.t1.high_neighbour[k]])) {
543 floor_setup->data.t1.high_neighbour[k]=j;
548 else if(floor_setup->floor_type==0) {
549 uint_fast8_t max_codebook_dim=0;
551 floor_setup->decode=vorbis_floor0_decode;
553 floor_setup->data.t0.order=get_bits(gb, 8);
554 floor_setup->data.t0.rate=get_bits(gb, 16);
555 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
556 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
557 /* zero would result in a div by zero later *
559 if (floor_setup->data.t0.amplitude_bits == 0) {
560 av_log(vc->avccontext, AV_LOG_ERROR,
561 "Floor 0 amplitude bits is 0.\n");
564 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
565 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
567 /* allocate mem for booklist */
568 floor_setup->data.t0.book_list=
569 av_malloc(floor_setup->data.t0.num_books);
570 if(!floor_setup->data.t0.book_list) { return 1; }
571 /* read book indexes */
574 uint_fast8_t book_idx;
575 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
576 book_idx=get_bits(gb, 8);
577 floor_setup->data.t0.book_list[idx]=book_idx;
578 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
579 max_codebook_dim=vc->codebooks[book_idx].dimensions;
581 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
588 /* allocate mem for lsp coefficients */
590 /* codebook dim is for padding if codebook dim doesn't *
591 * divide order+1 then we need to read more data */
592 floor_setup->data.t0.lsp=
593 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
595 if(!floor_setup->data.t0.lsp) { return 1; }
598 #ifdef V_DEBUG /* debug output parsed headers */
599 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
600 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
601 AV_DEBUG("floor0 bark map size: %u\n",
602 floor_setup->data.t0.bark_map_size);
603 AV_DEBUG("floor0 amplitude bits: %u\n",
604 floor_setup->data.t0.amplitude_bits);
605 AV_DEBUG("floor0 amplitude offset: %u\n",
606 floor_setup->data.t0.amplitude_offset);
607 AV_DEBUG("floor0 number of books: %u\n",
608 floor_setup->data.t0.num_books);
609 AV_DEBUG("floor0 book list pointer: %p\n",
610 floor_setup->data.t0.book_list);
613 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
614 AV_DEBUG( " Book %d: %u\n",
616 floor_setup->data.t0.book_list[idx] );
622 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
629 // Process residues part
631 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
632 GetBitContext *gb=&vc->gb;
633 uint_fast8_t i, j, k;
635 vc->residue_count=get_bits(gb, 6)+1;
636 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
638 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
640 for(i=0;i<vc->residue_count;++i) {
641 vorbis_residue *res_setup=&vc->residues[i];
642 uint_fast8_t cascade[64];
643 uint_fast8_t high_bits;
644 uint_fast8_t low_bits;
646 res_setup->type=get_bits(gb, 16);
648 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
650 res_setup->begin=get_bits(gb, 24);
651 res_setup->end=get_bits(gb, 24);
652 res_setup->partition_size=get_bits(gb, 24)+1;
653 res_setup->classifications=get_bits(gb, 6)+1;
654 res_setup->classbook=get_bits(gb, 8);
656 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,
657 res_setup->classifications, res_setup->classbook);
659 for(j=0;j<res_setup->classifications;++j) {
661 low_bits=get_bits(gb, 3);
663 high_bits=get_bits(gb, 5);
665 cascade[j]=(high_bits<<3)+low_bits;
667 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
670 res_setup->maxpass=0;
671 for(j=0;j<res_setup->classifications;++j) {
673 if (cascade[j]&(1<<k)) {
674 res_setup->books[j][k]=get_bits(gb, 8);
676 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
678 if (k>res_setup->maxpass) {
679 res_setup->maxpass=k;
682 res_setup->books[j][k]=-1;
690 // Process mappings part
692 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
693 GetBitContext *gb=&vc->gb;
696 vc->mapping_count=get_bits(gb, 6)+1;
697 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
699 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
701 for(i=0;i<vc->mapping_count;++i) {
702 vorbis_mapping *mapping_setup=&vc->mappings[i];
704 if (get_bits(gb, 16)) {
705 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
709 mapping_setup->submaps=get_bits(gb, 4)+1;
711 mapping_setup->submaps=1;
715 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
716 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
717 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
718 for(j=0;j<mapping_setup->coupling_steps;++j) {
719 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
720 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
721 // FIXME: sanity checks
724 mapping_setup->coupling_steps=0;
727 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
729 if(get_bits(gb, 2)) {
730 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
731 return 1; // following spec.
734 if (mapping_setup->submaps>1) {
735 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
736 for(j=0;j<vc->audio_channels;++j) {
737 mapping_setup->mux[j]=get_bits(gb, 4);
741 for(j=0;j<mapping_setup->submaps;++j) {
742 get_bits(gb, 8); // FIXME check?
743 mapping_setup->submap_floor[j]=get_bits(gb, 8);
744 mapping_setup->submap_residue[j]=get_bits(gb, 8);
746 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
752 // Process modes part
754 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
756 vorbis_floor * floors=vc->floors;
759 int_fast8_t blockflag;
761 int_fast32_t n; //TODO: could theoretically be smaller?
763 for (blockflag=0;blockflag<2;++blockflag)
765 n=vc->blocksize[blockflag]/2;
766 floors[floor_number].data.t0.map[blockflag]=
767 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
769 map=floors[floor_number].data.t0.map[blockflag];
770 vf=&floors[floor_number].data.t0;
772 for (idx=0; idx<n;++idx) {
773 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
774 ((vf->bark_map_size)/
775 BARK(vf->rate/2.0f )) );
776 if (vf->bark_map_size-1 < map[idx]) {
777 map[idx]=vf->bark_map_size-1;
781 vf->map_size[blockflag]=n;
785 for(idx=0;idx<=n;++idx) {
786 AV_DEBUG("floor0 map: map at pos %d is %d\n",
792 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
793 GetBitContext *gb=&vc->gb;
796 vc->mode_count=get_bits(gb, 6)+1;
797 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
799 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
801 for(i=0;i<vc->mode_count;++i) {
802 vorbis_mode *mode_setup=&vc->modes[i];
804 mode_setup->blockflag=get_bits(gb, 1);
805 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
806 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
807 mode_setup->mapping=get_bits(gb, 8); //FIXME check
809 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);
814 // Process the whole setup header using the functions above
816 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
817 GetBitContext *gb=&vc->gb;
819 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
820 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
821 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
822 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
826 if (vorbis_parse_setup_hdr_codebooks(vc)) {
827 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
830 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
831 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
834 if (vorbis_parse_setup_hdr_floors(vc)) {
835 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
838 if (vorbis_parse_setup_hdr_residues(vc)) {
839 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
842 if (vorbis_parse_setup_hdr_mappings(vc)) {
843 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
846 if (vorbis_parse_setup_hdr_modes(vc)) {
847 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
850 if (!get_bits1(gb)) {
851 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
852 return 8; // framing flag bit unset error
858 // Process the identification header
860 static int vorbis_parse_id_hdr(vorbis_context *vc){
861 GetBitContext *gb=&vc->gb;
862 uint_fast8_t bl0, bl1;
863 const float *vwin[8]={ vwin64, vwin128, vwin256, vwin512, vwin1024, vwin2048, vwin4096, vwin8192 };
865 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
866 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
867 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
868 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
872 vc->version=get_bits_long_le(gb, 32); //FIXME check 0
873 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
874 vc->audio_samplerate=get_bits_long_le(gb, 32); //FIXME check >0
875 vc->bitrate_maximum=get_bits_long_le(gb, 32);
876 vc->bitrate_nominal=get_bits_long_le(gb, 32);
877 vc->bitrate_minimum=get_bits_long_le(gb, 32);
880 vc->blocksize[0]=(1<<bl0);
881 vc->blocksize[1]=(1<<bl1);
882 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
883 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
886 // output format int16
887 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
888 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
889 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
890 "output packets too large.\n");
893 vc->win[0]=vwin[bl0-6];
894 vc->win[1]=vwin[bl1-6];
899 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
900 for(i=0; i<vc->blocksize[j]/2; i++)
901 win[i] = vc->win[j][i] * (1<<15);
906 if ((get_bits1(gb)) == 0) {
907 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
911 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
912 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
913 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
914 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
915 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
916 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
919 ff_mdct_init(&vc->mdct[0], bl0, 1);
920 ff_mdct_init(&vc->mdct[1], bl1, 1);
922 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 ",
923 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
926 BLK=vc->blocksize[0];
927 for(i=0;i<BLK/2;++i) {
928 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)));
935 // Process the extradata using the functions above (identification header, setup header)
937 static int vorbis_decode_init(AVCodecContext *avccontext) {
938 vorbis_context *vc = avccontext->priv_data ;
939 uint8_t *headers = avccontext->extradata;
940 int headers_len=avccontext->extradata_size;
941 uint8_t *header_start[3];
943 GetBitContext *gb = &(vc->gb);
946 vc->avccontext = avccontext;
947 dsputil_init(&vc->dsp, avccontext);
949 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
954 vc->exp_bias = 15<<23;
958 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
962 if(headers[0] == 0 && headers[1] == 30) {
963 for(i = 0; i < 3; i++){
964 header_len[i] = *headers++ << 8;
965 header_len[i] += *headers++;
966 header_start[i] = headers;
967 headers += header_len[i];
969 } else if(headers[0] == 2) {
970 for(j=1,i=0;i<2;++i, ++j) {
972 while(j<headers_len && headers[j]==0xff) {
976 if (j>=headers_len) {
977 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
980 header_len[i]+=headers[j];
982 header_len[2]=headers_len-header_len[0]-header_len[1]-j;
984 header_start[0] = headers;
985 header_start[1] = header_start[0] + header_len[0];
986 header_start[2] = header_start[1] + header_len[1];
988 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
992 init_get_bits(gb, header_start[0], header_len[0]*8);
993 hdr_type=get_bits(gb, 8);
995 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
998 if (vorbis_parse_id_hdr(vc)) {
999 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1004 init_get_bits(gb, header_start[2], header_len[2]*8);
1005 hdr_type=get_bits(gb, 8);
1007 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1010 if (vorbis_parse_setup_hdr(vc)) {
1011 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1016 avccontext->channels = vc->audio_channels;
1017 avccontext->sample_rate = vc->audio_samplerate;
1022 // Decode audiopackets -------------------------------------------------
1024 // Read and decode floor
1026 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1027 vorbis_floor_data *vfu, float *vec) {
1028 vorbis_floor0 * vf=&vfu->t0;
1029 float * lsp=vf->lsp;
1030 uint_fast32_t amplitude;
1031 uint_fast32_t book_idx;
1032 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1034 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1037 uint_fast16_t lsp_len = 0;
1039 vorbis_codebook codebook;
1041 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1042 if ( book_idx >= vf->num_books ) {
1043 av_log( vc->avccontext, AV_LOG_ERROR,
1044 "floor0 dec: booknumber too high!\n" );
1047 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1048 codebook=vc->codebooks[vf->book_list[book_idx]];
1050 while (lsp_len<vf->order) {
1053 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1054 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1055 /* read temp vector */
1056 vec_off=get_vlc2(&vc->gb,
1059 codebook.maxdepth ) *
1060 codebook.dimensions;
1061 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1062 /* copy each vector component and add last to it */
1063 for (idx=0; idx<codebook.dimensions; ++idx) {
1064 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1066 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1068 lsp_len += codebook.dimensions;
1071 /* DEBUG: output lsp coeffs */
1074 for ( idx = 0; idx < lsp_len; ++idx )
1075 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1079 /* synthesize floor output vector */
1082 int order=vf->order;
1083 float wstep=M_PI/vf->bark_map_size;
1085 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1087 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1088 vf->map_size, order, wstep);
1091 while(i<vf->map_size[blockflag]) {
1092 int j, iter_cond=vf->map[blockflag][i];
1095 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1097 /* similar part for the q and p products */
1098 for(j=0;j<order;j+=2) {
1099 q *= lsp[j] -two_cos_w;
1100 p *= lsp[j+1]-two_cos_w;
1102 if(j==order) { // even order
1103 p *= p*(2.0f-two_cos_w);
1104 q *= q*(2.0f+two_cos_w);
1107 q *= two_cos_w-lsp[j]; // one more time for q
1109 /* final step and square */
1110 p *= p*(4.f-two_cos_w*two_cos_w);
1114 /* calculate linear floor value */
1117 ( (amplitude*vf->amplitude_offset)/
1118 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1119 - vf->amplitude_offset ) * .11512925f
1124 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1129 /* this channel is unused */
1133 AV_DEBUG(" Floor0 decoded\n");
1137 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1138 vorbis_floor1 * vf=&vfu->t1;
1139 GetBitContext *gb=&vc->gb;
1140 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1141 uint_fast16_t range=range_v[vf->multiplier-1];
1142 uint_fast16_t floor1_Y[vf->x_list_dim];
1143 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1144 uint_fast8_t floor1_flag[vf->x_list_dim];
1145 uint_fast8_t class_;
1151 uint_fast16_t offset;
1153 uint_fast16_t *floor_x_sort=vf->x_list_order;
1154 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1155 int_fast16_t dy, err;
1156 uint_fast16_t lx,hx, ly, hy=0;
1159 if (!get_bits1(gb)) return 1; // silence
1161 // Read values (or differences) for the floor's points
1163 floor1_Y[0]=get_bits(gb, ilog(range-1));
1164 floor1_Y[1]=get_bits(gb, ilog(range-1));
1166 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1169 for(i=0;i<vf->partitions;++i) {
1170 class_=vf->partition_class[i];
1171 cdim=vf->class_dimensions[class_];
1172 cbits=vf->class_subclasses[class_];
1176 AV_DEBUG("Cbits %d \n", cbits);
1178 if (cbits) { // this reads all subclasses for this partition's class
1179 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1180 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1183 for(j=0;j<cdim;++j) {
1184 book=vf->subclass_books[class_][cval & csub];
1186 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1190 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1191 vc->codebooks[book].nb_bits, 3);
1193 floor1_Y[offset+j]=0;
1196 AV_DEBUG(" floor(%d) = %d \n", vf->x_list[offset+j], floor1_Y[offset+j]);
1201 // Amplitude calculation from the differences
1205 floor1_Y_final[0]=floor1_Y[0];
1206 floor1_Y_final[1]=floor1_Y[1];
1208 for(i=2;i<vf->x_list_dim;++i) {
1209 uint_fast16_t val, highroom, lowroom, room;
1210 uint_fast16_t high_neigh_offs;
1211 uint_fast16_t low_neigh_offs;
1213 low_neigh_offs=vf->low_neighbour[i];
1214 high_neigh_offs=vf->high_neighbour[i];
1215 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1216 adx=vf->x_list[high_neigh_offs]-vf->x_list[low_neigh_offs];
1218 err=ady*(vf->x_list[i]-vf->x_list[low_neigh_offs]);
1219 off=(int16_t)err/(int16_t)adx;
1221 predicted=floor1_Y_final[low_neigh_offs]-off;
1223 predicted=floor1_Y_final[low_neigh_offs]+off;
1224 } // render_point end
1227 highroom=range-predicted;
1229 if (highroom < lowroom) {
1232 room=lowroom*2; // SPEC mispelling
1235 floor1_flag[low_neigh_offs]=1;
1236 floor1_flag[high_neigh_offs]=1;
1239 if (highroom > lowroom) {
1240 floor1_Y_final[i]=val-lowroom+predicted;
1242 floor1_Y_final[i]=predicted-val+highroom-1;
1246 floor1_Y_final[i]=predicted-(val+1)/2;
1248 floor1_Y_final[i]=predicted+val/2;
1253 floor1_Y_final[i]=predicted;
1256 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->x_list[i], floor1_Y_final[i], val);
1259 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1263 ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
1265 vec[0]=floor1_inverse_db_table[ly];
1267 for(i=1;i<vf->x_list_dim;++i) {
1268 AV_DEBUG(" Looking at post %d \n", i);
1270 if (floor1_flag[floor_x_sort[i]]) { // SPEC mispelled
1271 int_fast16_t x, y, dy, base, sy; // if uncommented: dy = -32 adx = 2 base = 2blablabla ?????
1273 hy=floor1_Y_final[floor_x_sort[i]]*vf->multiplier;
1274 hx=vf->x_list[floor_x_sort[i]];
1278 ady= (dy<0) ? -dy:dy;//ABS(dy);
1279 base=(int16_t)dy/(int16_t)adx;
1281 AV_DEBUG(" dy %d adx %d base %d = %d \n", dy, adx, base, dy/adx);
1291 ady=ady-(base<0 ? -base : base)*adx;
1292 vec[x]=floor1_inverse_db_table[y];
1294 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1296 for(x=lx+1;(x<hx) && (x<vf->x_list[1]);++x) {
1304 vec[x]=floor1_inverse_db_table[y];
1306 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1309 /* for(j=1;j<hx-lx+1;++j) { // iterating render_point
1312 ady= dy<0 ? -dy : dy;
1320 if (lx+j < vf->x_list[1]) {
1321 vec[lx+j]=floor1_inverse_db_table[predicted];
1330 if (hx<vf->x_list[1]) {
1331 for(i=hx;i<vf->x_list[1];++i) {
1332 vec[i]=floor1_inverse_db_table[hy];
1336 AV_DEBUG(" Floor decoded\n");
1341 // Read and decode residue
1343 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) {
1344 GetBitContext *gb=&vc->gb;
1345 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1346 uint_fast16_t n_to_read=vr->end-vr->begin;
1347 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1348 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1350 uint_fast8_t ch_used;
1356 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1358 if (do_not_decode[0]) return 0;
1364 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1366 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1367 uint_fast16_t voffset;
1368 uint_fast16_t partition_count;
1369 uint_fast16_t j_times_ptns_to_read;
1372 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1374 uint_fast32_t inverse_class = inverse[vr->classifications];
1375 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1376 if (!do_not_decode[j]) {
1377 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1378 vc->codebooks[vr->classbook].nb_bits, 3);
1380 AV_DEBUG("Classword: %d \n", temp);
1382 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1383 for(i=0;i<c_p_c;++i) {
1384 uint_fast32_t temp2;
1386 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1387 if (partition_count+c_p_c-1-i < ptns_to_read) {
1388 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1393 j_times_ptns_to_read+=ptns_to_read;
1396 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1397 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1398 uint_fast16_t voffs;
1400 if (!do_not_decode[j]) {
1401 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1402 int_fast16_t vqbook=vr->books[vqclass][pass];
1405 uint_fast16_t coffs;
1406 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1407 uint_fast16_t step= dim==1 ? vr->partition_size
1408 : FASTDIV(vr->partition_size, dim);
1409 vorbis_codebook codebook= vc->codebooks[vqbook];
1413 voffs=voffset+j*vlen;
1414 for(k=0;k<step;++k) {
1415 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1416 for(l=0;l<dim;++l) {
1417 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1421 else if (vr->type==1) {
1422 voffs=voffset+j*vlen;
1423 for(k=0;k<step;++k) {
1424 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1425 for(l=0;l<dim;++l, ++voffs) {
1426 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1428 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1432 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1436 for(k=0;k<step;++k) {
1437 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1438 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1439 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1442 for(k=0;k<step;++k) {
1443 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1444 for(l=0;l<dim;l+=2, voffs++) {
1445 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1446 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1448 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);
1453 else if (vr->type==2) {
1456 for(k=0;k<step;++k) {
1457 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1458 for(l=0;l<dim;++l, ++voffs) {
1459 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1461 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);
1465 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1470 j_times_ptns_to_read+=ptns_to_read;
1473 voffset+=vr->partition_size;
1480 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1483 for(i=0; i<blocksize; i++)
1487 ang[i]=mag[i]-ang[i];
1505 // Decode the audio packet using the functions above
1507 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1508 GetBitContext *gb=&vc->gb;
1510 uint_fast8_t previous_window=0,next_window=0;
1511 uint_fast8_t mode_number;
1512 uint_fast16_t blocksize;
1514 uint_fast8_t no_residue[vc->audio_channels];
1515 uint_fast8_t do_not_decode[vc->audio_channels];
1516 vorbis_mapping *mapping;
1517 float *ch_res_ptr=vc->channel_residues;
1518 float *ch_floor_ptr=vc->channel_floors;
1519 uint_fast8_t res_chan[vc->audio_channels];
1520 uint_fast8_t res_num=0;
1521 int_fast16_t retlen=0;
1522 uint_fast16_t saved_start=0;
1523 float fadd_bias = vc->add_bias;
1525 if (get_bits1(gb)) {
1526 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1527 return -1; // packet type not audio
1530 if (vc->mode_count==1) {
1533 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1535 vc->mode_number=mode_number;
1536 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1538 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1540 if (vc->modes[mode_number].blockflag) {
1541 previous_window=get_bits1(gb);
1542 next_window=get_bits1(gb);
1545 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1546 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1547 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1551 for(i=0;i<vc->audio_channels;++i) {
1552 vorbis_floor *floor;
1553 if (mapping->submaps>1) {
1554 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1556 floor=&vc->floors[mapping->submap_floor[0]];
1559 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1560 ch_floor_ptr+=blocksize/2;
1563 // Nonzero vector propagate
1565 for(i=mapping->coupling_steps-1;i>=0;--i) {
1566 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1567 no_residue[mapping->magnitude[i]]=0;
1568 no_residue[mapping->angle[i]]=0;
1574 for(i=0;i<mapping->submaps;++i) {
1575 vorbis_residue *residue;
1578 for(j=0;j<vc->audio_channels;++j) {
1579 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1580 res_chan[j]=res_num;
1581 if (no_residue[j]) {
1582 do_not_decode[ch]=1;
1584 do_not_decode[ch]=0;
1590 residue=&vc->residues[mapping->submap_residue[i]];
1591 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1593 ch_res_ptr+=ch*blocksize/2;
1598 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1601 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1602 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1603 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1608 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1609 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1610 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1613 // MDCT, overlap/add, save data for next overlapping FPMATH
1615 for(j=0;j<vc->audio_channels;++j) {
1616 uint_fast8_t step=vc->audio_channels;
1618 float *saved=vc->saved+j*vc->blocksize[1]/2;
1620 const float *lwin=vc->win[1];
1621 const float *swin=vc->win[0];
1623 float *buf_tmp=vc->buf_tmp;
1625 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1627 saved_start=vc->saved_start;
1629 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1631 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1632 if (vc->modes[mode_number].blockflag) {
1634 if (previous_window) {
1635 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1636 retlen=vc->blocksize[1]/2;
1638 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1640 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1641 k = vc->blocksize[0]/2*step + j;
1642 buf += vc->blocksize[0]/2;
1644 for(i=0; i<len; i++, k+=step)
1645 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1647 for(i=0; i<len; i++, k+=step)
1648 ret[k] = buf[i] + fadd_bias;
1651 retlen=vc->blocksize[0]/2+len;
1655 buf += vc->blocksize[1]/2;
1656 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1659 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1660 buf += vc->blocksize[1]/2;
1661 for(i=0; i<saved_start; i++)
1662 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1663 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1668 for(k=j, i=0;i<saved_start;++i, k+=step)
1669 ret[k] = saved[i] + fadd_bias;
1671 for(k=j, i=0;i<saved_start;++i, k+=step)
1674 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1675 retlen=saved_start+vc->blocksize[0]/2;
1677 buf += vc->blocksize[0]/2;
1678 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1682 vc->saved_start=saved_start;
1684 return retlen*vc->audio_channels;
1687 // Return the decoded audio packet through the standard api
1689 static int vorbis_decode_frame(AVCodecContext *avccontext,
1690 void *data, int *data_size,
1691 uint8_t *buf, int buf_size)
1693 vorbis_context *vc = avccontext->priv_data ;
1694 GetBitContext *gb = &(vc->gb);
1702 AV_DEBUG("packet length %d \n", buf_size);
1704 init_get_bits(gb, buf, buf_size*8);
1706 len=vorbis_parse_audio_packet(vc);
1713 if (!vc->first_frame) {
1719 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1721 vc->dsp.float_to_int16(data, vc->ret, len);
1729 static int vorbis_decode_close(AVCodecContext *avccontext) {
1730 vorbis_context *vc = avccontext->priv_data;
1737 AVCodec vorbis_decoder = {
1741 sizeof(vorbis_context),
1744 vorbis_decode_close,
1745 vorbis_decode_frame,