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 */
48 #define ilog(i) av_log2(2*(i))
51 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
53 static unsigned int nth_root(unsigned int x, unsigned int n) { // x^(1/n)
54 unsigned int ret=0, i, j;
58 for(i=0,j=ret;i<n-1;i++) j*=ret;
64 static float vorbisfloat2float(uint_fast32_t val) {
65 double mant=val&0x1fffff;
66 long exp=(val&0x7fe00000L)>>21;
67 if (val&0x80000000) mant=-mant;
68 return(ldexp(mant, exp-20-768));
72 // Generate vlc codes from vorbis huffman code lengths
74 static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num) {
75 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
76 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
85 for(p=0;(bits[p]==0) && (p<num);++p);
87 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
92 for(i=0;i<bits[p];++i) {
93 exit_at_level[i+1]=1<<i;
97 av_log(vc->avccontext, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
98 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
99 for(i=0;i<bits[p];++i) {
100 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
102 av_log(vc->avccontext, AV_LOG_INFO, "\n");
108 if (bits[p]==0) continue;
109 // find corresponding exit(node which the tree can grow further from)
110 for(i=bits[p];i>0;--i) {
111 if (exit_at_level[i]) break;
113 if (!i) return 1; // overspecified tree
114 code=exit_at_level[i];
116 // construct code (append 0s to end) and introduce new exits
117 for(j=i+1;j<=bits[p];++j) {
118 exit_at_level[j]=code+(1<<(j-1));
123 av_log(vc->avccontext, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
124 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
125 for(i=0;i<bits[p];++i) {
126 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
128 av_log(vc->avccontext, AV_LOG_INFO, "\n");
133 //FIXME no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
138 // Free all allocated memory -----------------------------------------
140 static void vorbis_free(vorbis_context *vc) {
143 av_freep(&vc->channel_residues);
144 av_freep(&vc->channel_floors);
145 av_freep(&vc->saved);
148 av_freep(&vc->buf_tmp);
150 av_freep(&vc->residues);
151 av_freep(&vc->modes);
153 ff_mdct_end(&vc->mdct[0]);
154 ff_mdct_end(&vc->mdct[1]);
156 for(i=0;i<vc->codebook_count;++i) {
157 av_free(vc->codebooks[i].codevectors);
158 free_vlc(&vc->codebooks[i].vlc);
160 av_freep(&vc->codebooks);
162 for(i=0;i<vc->floor_count;++i) {
163 if(vc->floors[i].floor_type==0) {
164 av_free(vc->floors[i].data.t0.map[0]);
165 av_free(vc->floors[i].data.t0.map[1]);
166 av_free(vc->floors[i].data.t0.book_list);
167 av_free(vc->floors[i].data.t0.lsp);
170 av_free(vc->floors[i].data.t1.x_list);
171 av_free(vc->floors[i].data.t1.x_list_order);
172 av_free(vc->floors[i].data.t1.low_neighbour);
173 av_free(vc->floors[i].data.t1.high_neighbour);
176 av_freep(&vc->floors);
178 for(i=0;i<vc->mapping_count;++i) {
179 av_free(vc->mappings[i].magnitude);
180 av_free(vc->mappings[i].angle);
181 av_free(vc->mappings[i].mux);
183 av_freep(&vc->mappings);
186 av_freep(&vc->win[0]);
187 av_freep(&vc->win[1]);
191 // Parse setup header -------------------------------------------------
193 // Process codebooks part
195 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
197 uint_fast8_t *tmp_vlc_bits;
198 uint_fast32_t *tmp_vlc_codes;
199 GetBitContext *gb=&vc->gb;
201 vc->codebook_count=get_bits(gb,8)+1;
203 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
205 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
206 tmp_vlc_bits=(uint_fast8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast8_t));
207 tmp_vlc_codes=(uint_fast32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast32_t));
209 for(cb=0;cb<vc->codebook_count;++cb) {
210 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
211 uint_fast8_t ordered;
212 uint_fast32_t t, used_entries=0;
213 uint_fast32_t entries;
215 AV_DEBUG(" %d. Codebook \n", cb);
217 if (get_bits(gb, 24)!=0x564342) {
218 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
222 codebook_setup->dimensions=get_bits(gb, 16);
223 if (codebook_setup->dimensions>16) {
224 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
227 entries=get_bits(gb, 24);
228 if (entries>V_MAX_VLCS) {
229 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
233 ordered=get_bits1(gb);
235 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
240 uint_fast8_t sparse=get_bits1(gb);
242 AV_DEBUG(" not ordered \n");
245 AV_DEBUG(" sparse \n");
248 for(ce=0;ce<entries;++ce) {
251 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
254 else tmp_vlc_bits[ce]=0;
257 AV_DEBUG(" not sparse \n");
259 used_entries=entries;
260 for(ce=0;ce<entries;++ce) {
261 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
265 uint_fast16_t current_entry=0;
266 uint_fast8_t current_length=get_bits(gb, 5)+1;
268 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
270 used_entries=entries;
271 for(;current_entry<used_entries;++current_length) {
272 uint_fast16_t i, number;
274 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
276 number=get_bits(gb, ilog(entries - current_entry));
278 AV_DEBUG(" number: %d \n", number);
280 for(i=current_entry;i<number+current_entry;++i) {
281 if (i<used_entries) tmp_vlc_bits[i]=current_length;
284 current_entry+=number;
286 if (current_entry>used_entries) {
287 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
292 codebook_setup->lookup_type=get_bits(gb, 4);
294 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
296 // If the codebook is used for (inverse) VQ, calculate codevectors.
298 if (codebook_setup->lookup_type==1) {
299 uint_fast16_t i, j, k;
300 uint_fast16_t codebook_lookup_values=nth_root(entries, codebook_setup->dimensions);
301 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
303 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
304 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
305 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
306 uint_fast8_t codebook_sequence_p=get_bits1(gb);
308 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
309 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
311 for(i=0;i<codebook_lookup_values;++i) {
312 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
314 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
315 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
318 // Weed out unused vlcs and build codevector vector
319 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
320 for(j=0, i=0;i<entries;++i) {
321 uint_fast8_t dim=codebook_setup->dimensions;
323 if (tmp_vlc_bits[i]) {
325 uint_fast32_t lookup_offset=i;
328 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
332 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
333 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
334 if (codebook_sequence_p) {
335 last=codebook_setup->codevectors[j*dim+k];
337 lookup_offset/=codebook_lookup_values;
339 tmp_vlc_bits[j]=tmp_vlc_bits[i];
342 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
344 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
346 av_log(vc->avccontext, AV_LOG_INFO, "\n");
352 if (j!=used_entries) {
353 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
356 entries=used_entries;
358 else if (codebook_setup->lookup_type>=2) {
359 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
363 // Initialize VLC table
364 if (vorbis_len2vlc(vc, tmp_vlc_bits, tmp_vlc_codes, entries)) {
365 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
368 codebook_setup->maxdepth=0;
369 for(t=0;t<entries;++t)
370 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
372 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
373 else codebook_setup->nb_bits=V_NB_BITS;
375 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
377 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)) {
378 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
383 av_free(tmp_vlc_bits);
384 av_free(tmp_vlc_codes);
389 av_free(tmp_vlc_bits);
390 av_free(tmp_vlc_codes);
394 // Process time domain transforms part (unused in Vorbis I)
396 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
397 GetBitContext *gb=&vc->gb;
399 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
401 for(i=0;i<vorbis_time_count;++i) {
402 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
404 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
406 if (vorbis_tdtransform) {
407 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
414 // Process floors part
416 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
417 vorbis_floor_data *vfu, float *vec);
418 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
419 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
420 vorbis_floor_data *vfu, float *vec);
421 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
422 GetBitContext *gb=&vc->gb;
425 vc->floor_count=get_bits(gb, 6)+1;
427 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
429 for (i=0;i<vc->floor_count;++i) {
430 vorbis_floor *floor_setup=&vc->floors[i];
432 floor_setup->floor_type=get_bits(gb, 16);
434 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
436 if (floor_setup->floor_type==1) {
437 uint_fast8_t maximum_class=0;
438 uint_fast8_t rangebits;
439 uint_fast16_t floor1_values=2;
441 floor_setup->decode=vorbis_floor1_decode;
443 floor_setup->data.t1.partitions=get_bits(gb, 5);
445 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
447 for(j=0;j<floor_setup->data.t1.partitions;++j) {
448 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
449 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
451 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
455 AV_DEBUG(" maximum class %d \n", maximum_class);
457 floor_setup->data.t1.maximum_class=maximum_class;
459 for(j=0;j<=maximum_class;++j) {
460 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
461 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
463 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]);
465 if (floor_setup->data.t1.class_subclasses[j]) {
466 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
468 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
471 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
472 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
474 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
478 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
479 floor_setup->data.t1.x_list_dim=2;
481 for(j=0;j<floor_setup->data.t1.partitions;++j) {
482 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
485 floor_setup->data.t1.x_list=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
486 floor_setup->data.t1.x_list_order=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
487 floor_setup->data.t1.low_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
488 floor_setup->data.t1.high_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
491 rangebits=get_bits(gb, 4);
492 floor_setup->data.t1.x_list[0] = 0;
493 floor_setup->data.t1.x_list[1] = (1<<rangebits);
495 for(j=0;j<floor_setup->data.t1.partitions;++j) {
496 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
497 floor_setup->data.t1.x_list[floor1_values]=get_bits(gb, rangebits);
499 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.x_list[floor1_values]);
503 // Precalculate order of x coordinates - needed for decode
505 for(k=0;k<floor_setup->data.t1.x_list_dim;++k) {
506 floor_setup->data.t1.x_list_order[k]=k;
509 for(k=0;k<floor_setup->data.t1.x_list_dim-1;++k) { // FIXME optimize sorting ?
510 for(j=k+1;j<floor_setup->data.t1.x_list_dim;++j) {
511 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]]) {
512 uint_fast16_t tmp=floor_setup->data.t1.x_list_order[k];
513 floor_setup->data.t1.x_list_order[k]=floor_setup->data.t1.x_list_order[j];
514 floor_setup->data.t1.x_list_order[j]=tmp;
519 // Precalculate low and high neighbours
521 for(k=2;k<floor_setup->data.t1.x_list_dim;++k) {
522 floor_setup->data.t1.low_neighbour[k]=0;
523 floor_setup->data.t1.high_neighbour[k]=1; // correct according to SPEC requirements
526 if ((floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[k]) &&
527 (floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[floor_setup->data.t1.low_neighbour[k]])) {
528 floor_setup->data.t1.low_neighbour[k]=j;
530 if ((floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[k]) &&
531 (floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[floor_setup->data.t1.high_neighbour[k]])) {
532 floor_setup->data.t1.high_neighbour[k]=j;
537 else if(floor_setup->floor_type==0) {
538 uint_fast8_t max_codebook_dim=0;
540 floor_setup->decode=vorbis_floor0_decode;
542 floor_setup->data.t0.order=get_bits(gb, 8);
543 floor_setup->data.t0.rate=get_bits(gb, 16);
544 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
545 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
546 /* zero would result in a div by zero later *
548 if (floor_setup->data.t0.amplitude_bits == 0) {
549 av_log(vc->avccontext, AV_LOG_ERROR,
550 "Floor 0 amplitude bits is 0.\n");
553 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
554 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
556 /* allocate mem for booklist */
557 floor_setup->data.t0.book_list=
558 av_malloc(floor_setup->data.t0.num_books);
559 if(!floor_setup->data.t0.book_list) { return 1; }
560 /* read book indexes */
563 uint_fast8_t book_idx;
564 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
565 book_idx=get_bits(gb, 8);
566 floor_setup->data.t0.book_list[idx]=book_idx;
567 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
568 max_codebook_dim=vc->codebooks[book_idx].dimensions;
570 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
577 /* allocate mem for lsp coefficients */
579 /* codebook dim is for padding if codebook dim doesn't *
580 * divide order+1 then we need to read more data */
581 floor_setup->data.t0.lsp=
582 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
584 if(!floor_setup->data.t0.lsp) { return 1; }
587 #ifdef V_DEBUG /* debug output parsed headers */
588 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
589 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
590 AV_DEBUG("floor0 bark map size: %u\n",
591 floor_setup->data.t0.bark_map_size);
592 AV_DEBUG("floor0 amplitude bits: %u\n",
593 floor_setup->data.t0.amplitude_bits);
594 AV_DEBUG("floor0 amplitude offset: %u\n",
595 floor_setup->data.t0.amplitude_offset);
596 AV_DEBUG("floor0 number of books: %u\n",
597 floor_setup->data.t0.num_books);
598 AV_DEBUG("floor0 book list pointer: %p\n",
599 floor_setup->data.t0.book_list);
602 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
603 AV_DEBUG( " Book %d: %u\n",
605 floor_setup->data.t0.book_list[idx] );
611 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
618 // Process residues part
620 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
621 GetBitContext *gb=&vc->gb;
622 uint_fast8_t i, j, k;
624 vc->residue_count=get_bits(gb, 6)+1;
625 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
627 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
629 for(i=0;i<vc->residue_count;++i) {
630 vorbis_residue *res_setup=&vc->residues[i];
631 uint_fast8_t cascade[64];
632 uint_fast8_t high_bits;
633 uint_fast8_t low_bits;
635 res_setup->type=get_bits(gb, 16);
637 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
639 res_setup->begin=get_bits(gb, 24);
640 res_setup->end=get_bits(gb, 24);
641 res_setup->partition_size=get_bits(gb, 24)+1;
642 res_setup->classifications=get_bits(gb, 6)+1;
643 res_setup->classbook=get_bits(gb, 8);
645 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,
646 res_setup->classifications, res_setup->classbook);
648 for(j=0;j<res_setup->classifications;++j) {
650 low_bits=get_bits(gb, 3);
652 high_bits=get_bits(gb, 5);
654 cascade[j]=(high_bits<<3)+low_bits;
656 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
659 res_setup->maxpass=0;
660 for(j=0;j<res_setup->classifications;++j) {
662 if (cascade[j]&(1<<k)) {
663 res_setup->books[j][k]=get_bits(gb, 8);
665 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
667 if (k>res_setup->maxpass) {
668 res_setup->maxpass=k;
671 res_setup->books[j][k]=-1;
679 // Process mappings part
681 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
682 GetBitContext *gb=&vc->gb;
685 vc->mapping_count=get_bits(gb, 6)+1;
686 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
688 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
690 for(i=0;i<vc->mapping_count;++i) {
691 vorbis_mapping *mapping_setup=&vc->mappings[i];
693 if (get_bits(gb, 16)) {
694 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
698 mapping_setup->submaps=get_bits(gb, 4)+1;
700 mapping_setup->submaps=1;
704 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
705 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
706 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
707 for(j=0;j<mapping_setup->coupling_steps;++j) {
708 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
709 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
710 // FIXME: sanity checks
713 mapping_setup->coupling_steps=0;
716 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
718 if(get_bits(gb, 2)) {
719 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
720 return 1; // following spec.
723 if (mapping_setup->submaps>1) {
724 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
725 for(j=0;j<vc->audio_channels;++j) {
726 mapping_setup->mux[j]=get_bits(gb, 4);
730 for(j=0;j<mapping_setup->submaps;++j) {
731 get_bits(gb, 8); // FIXME check?
732 mapping_setup->submap_floor[j]=get_bits(gb, 8);
733 mapping_setup->submap_residue[j]=get_bits(gb, 8);
735 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
741 // Process modes part
743 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
745 vorbis_floor * floors=vc->floors;
748 int_fast8_t blockflag;
750 int_fast32_t n; //TODO: could theoretically be smaller?
752 for (blockflag=0;blockflag<2;++blockflag)
754 n=vc->blocksize[blockflag]/2;
755 floors[floor_number].data.t0.map[blockflag]=
756 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
758 map=floors[floor_number].data.t0.map[blockflag];
759 vf=&floors[floor_number].data.t0;
761 for (idx=0; idx<n;++idx) {
762 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
763 ((vf->bark_map_size)/
764 BARK(vf->rate/2.0f )) );
765 if (vf->bark_map_size-1 < map[idx]) {
766 map[idx]=vf->bark_map_size-1;
770 vf->map_size[blockflag]=n;
774 for(idx=0;idx<=n;++idx) {
775 AV_DEBUG("floor0 map: map at pos %d is %d\n",
781 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
782 GetBitContext *gb=&vc->gb;
785 vc->mode_count=get_bits(gb, 6)+1;
786 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
788 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
790 for(i=0;i<vc->mode_count;++i) {
791 vorbis_mode *mode_setup=&vc->modes[i];
793 mode_setup->blockflag=get_bits(gb, 1);
794 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
795 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
796 mode_setup->mapping=get_bits(gb, 8); //FIXME check
798 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);
803 // Process the whole setup header using the functions above
805 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
806 GetBitContext *gb=&vc->gb;
808 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
809 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
810 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
811 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
815 if (vorbis_parse_setup_hdr_codebooks(vc)) {
816 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
819 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
820 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
823 if (vorbis_parse_setup_hdr_floors(vc)) {
824 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
827 if (vorbis_parse_setup_hdr_residues(vc)) {
828 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
831 if (vorbis_parse_setup_hdr_mappings(vc)) {
832 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
835 if (vorbis_parse_setup_hdr_modes(vc)) {
836 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
839 if (!get_bits1(gb)) {
840 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
841 return 8; // framing flag bit unset error
847 // Process the identification header
849 static int vorbis_parse_id_hdr(vorbis_context *vc){
850 GetBitContext *gb=&vc->gb;
851 uint_fast8_t bl0, bl1;
852 const float *vwin[8]={ vwin64, vwin128, vwin256, vwin512, vwin1024, vwin2048, vwin4096, vwin8192 };
854 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
855 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
856 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
857 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
861 vc->version=get_bits_long(gb, 32); //FIXME check 0
862 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
863 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
864 vc->bitrate_maximum=get_bits_long(gb, 32);
865 vc->bitrate_nominal=get_bits_long(gb, 32);
866 vc->bitrate_minimum=get_bits_long(gb, 32);
869 vc->blocksize[0]=(1<<bl0);
870 vc->blocksize[1]=(1<<bl1);
871 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
872 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
875 // output format int16
876 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
877 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
878 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
879 "output packets too large.\n");
882 vc->win[0]=vwin[bl0-6];
883 vc->win[1]=vwin[bl1-6];
888 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
889 for(i=0; i<vc->blocksize[j]/2; i++)
890 win[i] = vc->win[j][i] * (1<<15);
895 if ((get_bits1(gb)) == 0) {
896 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
900 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
901 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
902 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
903 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
904 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
905 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
908 ff_mdct_init(&vc->mdct[0], bl0, 1);
909 ff_mdct_init(&vc->mdct[1], bl1, 1);
911 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 ",
912 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
915 BLK=vc->blocksize[0];
916 for(i=0;i<BLK/2;++i) {
917 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)));
924 // Process the extradata using the functions above (identification header, setup header)
926 static int vorbis_decode_init(AVCodecContext *avccontext) {
927 vorbis_context *vc = avccontext->priv_data ;
928 uint8_t *headers = avccontext->extradata;
929 int headers_len=avccontext->extradata_size;
930 uint8_t *header_start[3];
932 GetBitContext *gb = &(vc->gb);
935 vc->avccontext = avccontext;
936 dsputil_init(&vc->dsp, avccontext);
938 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
943 vc->exp_bias = 15<<23;
947 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
951 if(headers[0] == 0 && headers[1] == 30) {
952 for(i = 0; i < 3; i++){
953 header_len[i] = *headers++ << 8;
954 header_len[i] += *headers++;
955 header_start[i] = headers;
956 headers += header_len[i];
958 } else if(headers[0] == 2) {
959 for(j=1,i=0;i<2;++i, ++j) {
961 while(j<headers_len && headers[j]==0xff) {
965 if (j>=headers_len) {
966 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
969 header_len[i]+=headers[j];
971 header_len[2]=headers_len-header_len[0]-header_len[1]-j;
973 header_start[0] = headers;
974 header_start[1] = header_start[0] + header_len[0];
975 header_start[2] = header_start[1] + header_len[1];
977 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
981 init_get_bits(gb, header_start[0], header_len[0]*8);
982 hdr_type=get_bits(gb, 8);
984 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
987 if (vorbis_parse_id_hdr(vc)) {
988 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
993 init_get_bits(gb, header_start[2], header_len[2]*8);
994 hdr_type=get_bits(gb, 8);
996 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
999 if (vorbis_parse_setup_hdr(vc)) {
1000 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1005 avccontext->channels = vc->audio_channels;
1006 avccontext->sample_rate = vc->audio_samplerate;
1011 // Decode audiopackets -------------------------------------------------
1013 // Read and decode floor
1015 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1016 vorbis_floor_data *vfu, float *vec) {
1017 vorbis_floor0 * vf=&vfu->t0;
1018 float * lsp=vf->lsp;
1019 uint_fast32_t amplitude;
1020 uint_fast32_t book_idx;
1021 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1023 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1026 uint_fast16_t lsp_len = 0;
1028 vorbis_codebook codebook;
1030 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1031 if ( book_idx >= vf->num_books ) {
1032 av_log( vc->avccontext, AV_LOG_ERROR,
1033 "floor0 dec: booknumber too high!\n" );
1036 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1037 codebook=vc->codebooks[vf->book_list[book_idx]];
1039 while (lsp_len<vf->order) {
1042 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1043 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1044 /* read temp vector */
1045 vec_off=get_vlc2(&vc->gb,
1048 codebook.maxdepth ) *
1049 codebook.dimensions;
1050 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1051 /* copy each vector component and add last to it */
1052 for (idx=0; idx<codebook.dimensions; ++idx) {
1053 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1055 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1057 lsp_len += codebook.dimensions;
1060 /* DEBUG: output lsp coeffs */
1063 for ( idx = 0; idx < lsp_len; ++idx )
1064 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1068 /* synthesize floor output vector */
1071 int order=vf->order;
1072 float wstep=M_PI/vf->bark_map_size;
1074 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1076 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1077 vf->map_size, order, wstep);
1080 while(i<vf->map_size[blockflag]) {
1081 int j, iter_cond=vf->map[blockflag][i];
1084 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1086 /* similar part for the q and p products */
1087 for(j=0;j<order;j+=2) {
1088 q *= lsp[j] -two_cos_w;
1089 p *= lsp[j+1]-two_cos_w;
1091 if(j==order) { // even order
1092 p *= p*(2.0f-two_cos_w);
1093 q *= q*(2.0f+two_cos_w);
1096 q *= two_cos_w-lsp[j]; // one more time for q
1098 /* final step and square */
1099 p *= p*(4.f-two_cos_w*two_cos_w);
1103 /* calculate linear floor value */
1106 ( (amplitude*vf->amplitude_offset)/
1107 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1108 - vf->amplitude_offset ) * .11512925f
1113 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1118 /* this channel is unused */
1122 AV_DEBUG(" Floor0 decoded\n");
1126 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1127 vorbis_floor1 * vf=&vfu->t1;
1128 GetBitContext *gb=&vc->gb;
1129 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1130 uint_fast16_t range=range_v[vf->multiplier-1];
1131 uint_fast16_t floor1_Y[vf->x_list_dim];
1132 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1133 uint_fast8_t floor1_flag[vf->x_list_dim];
1134 uint_fast8_t class_;
1140 uint_fast16_t offset;
1142 uint_fast16_t *floor_x_sort=vf->x_list_order;
1143 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1144 int_fast16_t dy, err;
1145 uint_fast16_t lx,hx, ly, hy=0;
1148 if (!get_bits1(gb)) return 1; // silence
1150 // Read values (or differences) for the floor's points
1152 floor1_Y[0]=get_bits(gb, ilog(range-1));
1153 floor1_Y[1]=get_bits(gb, ilog(range-1));
1155 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1158 for(i=0;i<vf->partitions;++i) {
1159 class_=vf->partition_class[i];
1160 cdim=vf->class_dimensions[class_];
1161 cbits=vf->class_subclasses[class_];
1165 AV_DEBUG("Cbits %d \n", cbits);
1167 if (cbits) { // this reads all subclasses for this partition's class
1168 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1169 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1172 for(j=0;j<cdim;++j) {
1173 book=vf->subclass_books[class_][cval & csub];
1175 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1179 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1180 vc->codebooks[book].nb_bits, 3);
1182 floor1_Y[offset+j]=0;
1185 AV_DEBUG(" floor(%d) = %d \n", vf->x_list[offset+j], floor1_Y[offset+j]);
1190 // Amplitude calculation from the differences
1194 floor1_Y_final[0]=floor1_Y[0];
1195 floor1_Y_final[1]=floor1_Y[1];
1197 for(i=2;i<vf->x_list_dim;++i) {
1198 uint_fast16_t val, highroom, lowroom, room;
1199 uint_fast16_t high_neigh_offs;
1200 uint_fast16_t low_neigh_offs;
1202 low_neigh_offs=vf->low_neighbour[i];
1203 high_neigh_offs=vf->high_neighbour[i];
1204 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1205 adx=vf->x_list[high_neigh_offs]-vf->x_list[low_neigh_offs];
1207 err=ady*(vf->x_list[i]-vf->x_list[low_neigh_offs]);
1208 off=(int16_t)err/(int16_t)adx;
1210 predicted=floor1_Y_final[low_neigh_offs]-off;
1212 predicted=floor1_Y_final[low_neigh_offs]+off;
1213 } // render_point end
1216 highroom=range-predicted;
1218 if (highroom < lowroom) {
1221 room=lowroom*2; // SPEC mispelling
1224 floor1_flag[low_neigh_offs]=1;
1225 floor1_flag[high_neigh_offs]=1;
1228 if (highroom > lowroom) {
1229 floor1_Y_final[i]=val-lowroom+predicted;
1231 floor1_Y_final[i]=predicted-val+highroom-1;
1235 floor1_Y_final[i]=predicted-(val+1)/2;
1237 floor1_Y_final[i]=predicted+val/2;
1242 floor1_Y_final[i]=predicted;
1245 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->x_list[i], floor1_Y_final[i], val);
1248 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1252 ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
1254 vec[0]=floor1_inverse_db_table[ly];
1256 for(i=1;i<vf->x_list_dim;++i) {
1257 AV_DEBUG(" Looking at post %d \n", i);
1259 if (floor1_flag[floor_x_sort[i]]) { // SPEC mispelled
1260 int_fast16_t x, y, dy, base, sy; // if uncommented: dy = -32 adx = 2 base = 2blablabla ?????
1262 hy=floor1_Y_final[floor_x_sort[i]]*vf->multiplier;
1263 hx=vf->x_list[floor_x_sort[i]];
1267 ady= (dy<0) ? -dy:dy;//ABS(dy);
1268 base=(int16_t)dy/(int16_t)adx;
1270 AV_DEBUG(" dy %d adx %d base %d = %d \n", dy, adx, base, dy/adx);
1280 ady=ady-(base<0 ? -base : base)*adx;
1281 vec[x]=floor1_inverse_db_table[y];
1283 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1285 for(x=lx+1;(x<hx) && (x<vf->x_list[1]);++x) {
1293 vec[x]=floor1_inverse_db_table[y];
1295 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1298 /* for(j=1;j<hx-lx+1;++j) { // iterating render_point
1301 ady= dy<0 ? -dy : dy;
1309 if (lx+j < vf->x_list[1]) {
1310 vec[lx+j]=floor1_inverse_db_table[predicted];
1319 if (hx<vf->x_list[1]) {
1320 for(i=hx;i<vf->x_list[1];++i) {
1321 vec[i]=floor1_inverse_db_table[hy];
1325 AV_DEBUG(" Floor decoded\n");
1330 // Read and decode residue
1332 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) {
1333 GetBitContext *gb=&vc->gb;
1334 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1335 uint_fast16_t n_to_read=vr->end-vr->begin;
1336 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1337 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1339 uint_fast8_t ch_used;
1345 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1347 if (do_not_decode[0]) return 0;
1353 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1355 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1356 uint_fast16_t voffset;
1357 uint_fast16_t partition_count;
1358 uint_fast16_t j_times_ptns_to_read;
1361 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1363 uint_fast32_t inverse_class = inverse[vr->classifications];
1364 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1365 if (!do_not_decode[j]) {
1366 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1367 vc->codebooks[vr->classbook].nb_bits, 3);
1369 AV_DEBUG("Classword: %d \n", temp);
1371 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1372 for(i=0;i<c_p_c;++i) {
1373 uint_fast32_t temp2;
1375 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1376 if (partition_count+c_p_c-1-i < ptns_to_read) {
1377 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1382 j_times_ptns_to_read+=ptns_to_read;
1385 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1386 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1387 uint_fast16_t voffs;
1389 if (!do_not_decode[j]) {
1390 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1391 int_fast16_t vqbook=vr->books[vqclass][pass];
1394 uint_fast16_t coffs;
1395 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1396 uint_fast16_t step= dim==1 ? vr->partition_size
1397 : FASTDIV(vr->partition_size, dim);
1398 vorbis_codebook codebook= vc->codebooks[vqbook];
1402 voffs=voffset+j*vlen;
1403 for(k=0;k<step;++k) {
1404 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1405 for(l=0;l<dim;++l) {
1406 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1410 else if (vr->type==1) {
1411 voffs=voffset+j*vlen;
1412 for(k=0;k<step;++k) {
1413 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1414 for(l=0;l<dim;++l, ++voffs) {
1415 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1417 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1421 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1425 for(k=0;k<step;++k) {
1426 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1427 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1428 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1431 for(k=0;k<step;++k) {
1432 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1433 for(l=0;l<dim;l+=2, voffs++) {
1434 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1435 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1437 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);
1442 else if (vr->type==2) {
1445 for(k=0;k<step;++k) {
1446 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1447 for(l=0;l<dim;++l, ++voffs) {
1448 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1450 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);
1454 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1459 j_times_ptns_to_read+=ptns_to_read;
1462 voffset+=vr->partition_size;
1469 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1472 for(i=0; i<blocksize; i++)
1476 ang[i]=mag[i]-ang[i];
1494 // Decode the audio packet using the functions above
1496 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1497 GetBitContext *gb=&vc->gb;
1499 uint_fast8_t previous_window=0,next_window=0;
1500 uint_fast8_t mode_number;
1501 uint_fast16_t blocksize;
1503 uint_fast8_t no_residue[vc->audio_channels];
1504 uint_fast8_t do_not_decode[vc->audio_channels];
1505 vorbis_mapping *mapping;
1506 float *ch_res_ptr=vc->channel_residues;
1507 float *ch_floor_ptr=vc->channel_floors;
1508 uint_fast8_t res_chan[vc->audio_channels];
1509 uint_fast8_t res_num=0;
1510 int_fast16_t retlen=0;
1511 uint_fast16_t saved_start=0;
1512 float fadd_bias = vc->add_bias;
1514 if (get_bits1(gb)) {
1515 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1516 return -1; // packet type not audio
1519 if (vc->mode_count==1) {
1522 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1524 vc->mode_number=mode_number;
1525 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1527 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1529 if (vc->modes[mode_number].blockflag) {
1530 previous_window=get_bits1(gb);
1531 next_window=get_bits1(gb);
1534 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1535 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1536 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1540 for(i=0;i<vc->audio_channels;++i) {
1541 vorbis_floor *floor;
1542 if (mapping->submaps>1) {
1543 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1545 floor=&vc->floors[mapping->submap_floor[0]];
1548 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1549 ch_floor_ptr+=blocksize/2;
1552 // Nonzero vector propagate
1554 for(i=mapping->coupling_steps-1;i>=0;--i) {
1555 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1556 no_residue[mapping->magnitude[i]]=0;
1557 no_residue[mapping->angle[i]]=0;
1563 for(i=0;i<mapping->submaps;++i) {
1564 vorbis_residue *residue;
1567 for(j=0;j<vc->audio_channels;++j) {
1568 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1569 res_chan[j]=res_num;
1570 if (no_residue[j]) {
1571 do_not_decode[ch]=1;
1573 do_not_decode[ch]=0;
1579 residue=&vc->residues[mapping->submap_residue[i]];
1580 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1582 ch_res_ptr+=ch*blocksize/2;
1587 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1590 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1591 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1592 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1597 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1598 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1599 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1602 // MDCT, overlap/add, save data for next overlapping FPMATH
1604 for(j=0;j<vc->audio_channels;++j) {
1605 uint_fast8_t step=vc->audio_channels;
1607 float *saved=vc->saved+j*vc->blocksize[1]/2;
1609 const float *lwin=vc->win[1];
1610 const float *swin=vc->win[0];
1612 float *buf_tmp=vc->buf_tmp;
1614 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1616 saved_start=vc->saved_start;
1618 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1620 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1621 if (vc->modes[mode_number].blockflag) {
1623 if (previous_window) {
1624 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1625 retlen=vc->blocksize[1]/2;
1627 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1629 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1630 k = vc->blocksize[0]/2*step + j;
1631 buf += vc->blocksize[0]/2;
1633 for(i=0; i<len; i++, k+=step)
1634 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1636 for(i=0; i<len; i++, k+=step)
1637 ret[k] = buf[i] + fadd_bias;
1640 retlen=vc->blocksize[0]/2+len;
1644 buf += vc->blocksize[1]/2;
1645 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1648 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1649 buf += vc->blocksize[1]/2;
1650 for(i=0; i<saved_start; i++)
1651 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1652 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1657 for(k=j, i=0;i<saved_start;++i, k+=step)
1658 ret[k] = saved[i] + fadd_bias;
1660 for(k=j, i=0;i<saved_start;++i, k+=step)
1663 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1664 retlen=saved_start+vc->blocksize[0]/2;
1666 buf += vc->blocksize[0]/2;
1667 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1671 vc->saved_start=saved_start;
1673 return retlen*vc->audio_channels;
1676 // Return the decoded audio packet through the standard api
1678 static int vorbis_decode_frame(AVCodecContext *avccontext,
1679 void *data, int *data_size,
1680 uint8_t *buf, int buf_size)
1682 vorbis_context *vc = avccontext->priv_data ;
1683 GetBitContext *gb = &(vc->gb);
1691 AV_DEBUG("packet length %d \n", buf_size);
1693 init_get_bits(gb, buf, buf_size*8);
1695 len=vorbis_parse_audio_packet(vc);
1702 if (!vc->first_frame) {
1708 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1710 vc->dsp.float_to_int16(data, vc->ret, len);
1718 static int vorbis_decode_close(AVCodecContext *avccontext) {
1719 vorbis_context *vc = avccontext->priv_data;
1726 AVCodec vorbis_decoder = {
1730 sizeof(vorbis_context),
1733 vorbis_decode_close,
1734 vorbis_decode_frame,