4 * @author Denes Balatoni ( dbalatoni programozo hu )
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 //#define AV_DEBUG(...) av_log(NULL, AV_LOG_INFO, __VA_ARGS__)
28 #define ALT_BITSTREAM_READER_LE
30 #include "bitstream.h"
37 #define V_MAX_VLCS (1<<16)
47 uint_fast8_t dimensions;
48 uint_fast8_t lookup_type;
49 uint_fast8_t maxdepth;
55 typedef union vorbis_floor_u vorbis_floor_data;
56 typedef struct vorbis_floor0_s vorbis_floor0;
57 typedef struct vorbis_floor1_s vorbis_floor1;
58 struct vorbis_context_s;
60 uint_fast8_t (* vorbis_floor_decode_func)
61 (struct vorbis_context_s *, vorbis_floor_data *, float *);
63 uint_fast8_t floor_type;
64 vorbis_floor_decode_func decode;
67 struct vorbis_floor0_s
71 uint_fast16_t bark_map_size;
72 int_fast32_t * map[2];
73 uint_fast32_t map_size[2];
74 uint_fast8_t amplitude_bits;
75 uint_fast8_t amplitude_offset;
76 uint_fast8_t num_books;
77 uint_fast8_t * book_list;
80 struct vorbis_floor1_s
82 uint_fast8_t partitions;
83 uint_fast8_t maximum_class;
84 uint_fast8_t partition_class[32];
85 uint_fast8_t class_dimensions[16];
86 uint_fast8_t class_subclasses[16];
87 uint_fast8_t class_masterbook[16];
88 int_fast16_t subclass_books[16][8];
89 uint_fast8_t multiplier;
90 uint_fast16_t x_list_dim;
91 uint_fast16_t *x_list;
92 uint_fast16_t *x_list_order;
93 uint_fast16_t *low_neighbour;
94 uint_fast16_t *high_neighbour;
103 uint_fast32_t partition_size;
104 uint_fast8_t classifications;
105 uint_fast8_t classbook;
106 int_fast16_t books[64][8];
107 uint_fast8_t maxpass;
111 uint_fast8_t submaps;
112 uint_fast16_t coupling_steps;
113 uint_fast8_t *magnitude;
116 uint_fast8_t submap_floor[16];
117 uint_fast8_t submap_residue[16];
121 uint_fast8_t blockflag;
122 uint_fast16_t windowtype;
123 uint_fast16_t transformtype;
124 uint_fast8_t mapping;
127 typedef struct vorbis_context_s {
128 AVCodecContext *avccontext;
133 uint_fast8_t first_frame;
134 uint_fast32_t version;
135 uint_fast8_t audio_channels;
136 uint_fast32_t audio_samplerate;
137 uint_fast32_t bitrate_maximum;
138 uint_fast32_t bitrate_nominal;
139 uint_fast32_t bitrate_minimum;
140 uint_fast32_t blocksize[2];
141 const float * win[2];
142 uint_fast16_t codebook_count;
143 vorbis_codebook *codebooks;
144 uint_fast8_t floor_count;
145 vorbis_floor *floors;
146 uint_fast8_t residue_count;
147 vorbis_residue *residues;
148 uint_fast8_t mapping_count;
149 vorbis_mapping *mappings;
150 uint_fast8_t mode_count;
152 uint_fast8_t mode_number; // mode number for the current packet
153 float *channel_residues;
154 float *channel_floors;
156 uint_fast16_t saved_start;
160 uint_fast32_t add_bias; // for float->int conversion
161 uint_fast32_t exp_bias;
164 /* Helper functions */
166 #define ilog(i) av_log2(2*(i))
169 (13.1f*atan(0.00074f*(x))+2.24f*atan(1.85e-8f*(x)*(x))+1e-4f*(x))
171 static unsigned int nth_root(unsigned int x, unsigned int n) { // x^(1/n)
172 unsigned int ret=0, i, j;
176 for(i=0,j=ret;i<n-1;i++) j*=ret;
182 static float vorbisfloat2float(uint_fast32_t val) {
183 double mant=val&0x1fffff;
184 long exp=(val&0x7fe00000L)>>21;
185 if (val&0x80000000) mant=-mant;
186 return(ldexp(mant, exp-20-768));
190 // Generate vlc codes from vorbis huffman code lengths
192 static int vorbis_len2vlc(vorbis_context *vc, uint_fast8_t *bits, uint_fast32_t *codes, uint_fast32_t num) {
193 uint_fast32_t exit_at_level[33]={404,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
194 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
197 uint_fast32_t code,p;
203 for(p=0;(bits[p]==0) && (p<num);++p);
205 // av_log(vc->avccontext, AV_LOG_INFO, "An empty codebook. Heh?! \n");
210 for(i=0;i<bits[p];++i) {
211 exit_at_level[i+1]=1<<i;
215 av_log(vc->avccontext, AV_LOG_INFO, " %d. of %d code len %d code %d - ", p, num, bits[p], codes[p]);
216 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
217 for(i=0;i<bits[p];++i) {
218 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
220 av_log(vc->avccontext, AV_LOG_INFO, "\n");
226 if (bits[p]==0) continue;
227 // find corresponding exit(node which the tree can grow further from)
228 for(i=bits[p];i>0;--i) {
229 if (exit_at_level[i]) break;
231 if (!i) return 1; // overspecified tree
232 code=exit_at_level[i];
234 // construct code (append 0s to end) and introduce new exits
235 for(j=i+1;j<=bits[p];++j) {
236 exit_at_level[j]=code+(1<<(j-1));
241 av_log(vc->avccontext, AV_LOG_INFO, " %d. code len %d code %d - ", p, bits[p], codes[p]);
242 init_get_bits(&gb, (uint_fast8_t *)&codes[p], bits[p]);
243 for(i=0;i<bits[p];++i) {
244 av_log(vc->avccontext, AV_LOG_INFO, "%s", get_bits1(&gb) ? "1" : "0");
246 av_log(vc->avccontext, AV_LOG_INFO, "\n");
251 //FIXME no exits should be left (underspecified tree - ie. unused valid vlcs - not allowed by SPEC)
256 // Free all allocated memory -----------------------------------------
258 static void vorbis_free(vorbis_context *vc) {
261 av_freep(&vc->channel_residues);
262 av_freep(&vc->channel_floors);
263 av_freep(&vc->saved);
266 av_freep(&vc->buf_tmp);
268 av_freep(&vc->residues);
269 av_freep(&vc->modes);
271 ff_mdct_end(&vc->mdct[0]);
272 ff_mdct_end(&vc->mdct[1]);
274 for(i=0;i<vc->codebook_count;++i) {
275 av_free(vc->codebooks[i].codevectors);
276 free_vlc(&vc->codebooks[i].vlc);
278 av_freep(&vc->codebooks);
280 for(i=0;i<vc->floor_count;++i) {
281 if(vc->floors[i].floor_type==0) {
282 av_free(vc->floors[i].data.t0.map[0]);
283 av_free(vc->floors[i].data.t0.map[1]);
284 av_free(vc->floors[i].data.t0.book_list);
285 av_free(vc->floors[i].data.t0.lsp);
288 av_free(vc->floors[i].data.t1.x_list);
289 av_free(vc->floors[i].data.t1.x_list_order);
290 av_free(vc->floors[i].data.t1.low_neighbour);
291 av_free(vc->floors[i].data.t1.high_neighbour);
294 av_freep(&vc->floors);
296 for(i=0;i<vc->mapping_count;++i) {
297 av_free(vc->mappings[i].magnitude);
298 av_free(vc->mappings[i].angle);
299 av_free(vc->mappings[i].mux);
301 av_freep(&vc->mappings);
304 av_freep(&vc->win[0]);
305 av_freep(&vc->win[1]);
309 // Parse setup header -------------------------------------------------
311 // Process codebooks part
313 static int vorbis_parse_setup_hdr_codebooks(vorbis_context *vc) {
315 uint_fast8_t *tmp_vlc_bits;
316 uint_fast32_t *tmp_vlc_codes;
317 GetBitContext *gb=&vc->gb;
319 vc->codebook_count=get_bits(gb,8)+1;
321 AV_DEBUG(" Codebooks: %d \n", vc->codebook_count);
323 vc->codebooks=(vorbis_codebook *)av_mallocz(vc->codebook_count * sizeof(vorbis_codebook));
324 tmp_vlc_bits=(uint_fast8_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast8_t));
325 tmp_vlc_codes=(uint_fast32_t *)av_mallocz(V_MAX_VLCS * sizeof(uint_fast32_t));
327 for(cb=0;cb<vc->codebook_count;++cb) {
328 vorbis_codebook *codebook_setup=&vc->codebooks[cb];
329 uint_fast8_t ordered;
330 uint_fast32_t t, used_entries=0;
331 uint_fast32_t entries;
333 AV_DEBUG(" %d. Codebook \n", cb);
335 if (get_bits(gb, 24)!=0x564342) {
336 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook setup data corrupt. \n", cb);
340 codebook_setup->dimensions=get_bits(gb, 16);
341 if (codebook_setup->dimensions>16) {
342 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook's dimension is too large (%d). \n", cb, codebook_setup->dimensions);
345 entries=get_bits(gb, 24);
346 if (entries>V_MAX_VLCS) {
347 av_log(vc->avccontext, AV_LOG_ERROR, " %"PRIdFAST16". Codebook has too many entries (%"PRIdFAST32"). \n", cb, entries);
351 ordered=get_bits1(gb);
353 AV_DEBUG(" codebook_dimensions %d, codebook_entries %d \n", codebook_setup->dimensions, entries);
358 uint_fast8_t sparse=get_bits1(gb);
360 AV_DEBUG(" not ordered \n");
363 AV_DEBUG(" sparse \n");
366 for(ce=0;ce<entries;++ce) {
369 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
372 else tmp_vlc_bits[ce]=0;
375 AV_DEBUG(" not sparse \n");
377 used_entries=entries;
378 for(ce=0;ce<entries;++ce) {
379 tmp_vlc_bits[ce]=get_bits(gb, 5)+1;
383 uint_fast16_t current_entry=0;
384 uint_fast8_t current_length=get_bits(gb, 5)+1;
386 AV_DEBUG(" ordered, current length: %d \n", current_length); //FIXME
388 used_entries=entries;
389 for(;current_entry<used_entries;++current_length) {
390 uint_fast16_t i, number;
392 AV_DEBUG(" number bits: %d ", ilog(entries - current_entry));
394 number=get_bits(gb, ilog(entries - current_entry));
396 AV_DEBUG(" number: %d \n", number);
398 for(i=current_entry;i<number+current_entry;++i) {
399 if (i<used_entries) tmp_vlc_bits[i]=current_length;
402 current_entry+=number;
404 if (current_entry>used_entries) {
405 av_log(vc->avccontext, AV_LOG_ERROR, " More codelengths than codes in codebook. \n");
410 codebook_setup->lookup_type=get_bits(gb, 4);
412 AV_DEBUG(" lookup type: %d : %s \n", codebook_setup->lookup_type, codebook_setup->lookup_type ? "vq" : "no lookup" );
414 // If the codebook is used for (inverse) VQ, calculate codevectors.
416 if (codebook_setup->lookup_type==1) {
417 uint_fast16_t i, j, k;
418 uint_fast16_t codebook_lookup_values=nth_root(entries, codebook_setup->dimensions);
419 uint_fast16_t codebook_multiplicands[codebook_lookup_values];
421 float codebook_minimum_value=vorbisfloat2float(get_bits_long(gb, 32));
422 float codebook_delta_value=vorbisfloat2float(get_bits_long(gb, 32));
423 uint_fast8_t codebook_value_bits=get_bits(gb, 4)+1;
424 uint_fast8_t codebook_sequence_p=get_bits1(gb);
426 AV_DEBUG(" We expect %d numbers for building the codevectors. \n", codebook_lookup_values);
427 AV_DEBUG(" delta %f minmum %f \n", codebook_delta_value, codebook_minimum_value);
429 for(i=0;i<codebook_lookup_values;++i) {
430 codebook_multiplicands[i]=get_bits(gb, codebook_value_bits);
432 AV_DEBUG(" multiplicands*delta+minmum : %e \n", (float)codebook_multiplicands[i]*codebook_delta_value+codebook_minimum_value);
433 AV_DEBUG(" multiplicand %d \n", codebook_multiplicands[i]);
436 // Weed out unused vlcs and build codevector vector
437 codebook_setup->codevectors=(float *)av_mallocz(used_entries*codebook_setup->dimensions * sizeof(float));
438 for(j=0, i=0;i<entries;++i) {
439 uint_fast8_t dim=codebook_setup->dimensions;
441 if (tmp_vlc_bits[i]) {
443 uint_fast32_t lookup_offset=i;
446 av_log(vc->avccontext, AV_LOG_INFO, "Lookup offset %d ,", i);
450 uint_fast32_t multiplicand_offset = lookup_offset % codebook_lookup_values;
451 codebook_setup->codevectors[j*dim+k]=codebook_multiplicands[multiplicand_offset]*codebook_delta_value+codebook_minimum_value+last;
452 if (codebook_sequence_p) {
453 last=codebook_setup->codevectors[j*dim+k];
455 lookup_offset/=codebook_lookup_values;
457 tmp_vlc_bits[j]=tmp_vlc_bits[i];
460 av_log(vc->avccontext, AV_LOG_INFO, "real lookup offset %d, vector: ", j);
462 av_log(vc->avccontext, AV_LOG_INFO, " %f ", codebook_setup->codevectors[j*dim+k]);
464 av_log(vc->avccontext, AV_LOG_INFO, "\n");
470 if (j!=used_entries) {
471 av_log(vc->avccontext, AV_LOG_ERROR, "Bug in codevector vector building code. \n");
474 entries=used_entries;
476 else if (codebook_setup->lookup_type>=2) {
477 av_log(vc->avccontext, AV_LOG_ERROR, "Codebook lookup type not supported. \n");
481 // Initialize VLC table
482 if (vorbis_len2vlc(vc, tmp_vlc_bits, tmp_vlc_codes, entries)) {
483 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid code lengths while generating vlcs. \n");
486 codebook_setup->maxdepth=0;
487 for(t=0;t<entries;++t)
488 if (tmp_vlc_bits[t]>=codebook_setup->maxdepth) codebook_setup->maxdepth=tmp_vlc_bits[t];
490 if(codebook_setup->maxdepth > 3*V_NB_BITS) codebook_setup->nb_bits=V_NB_BITS2;
491 else codebook_setup->nb_bits=V_NB_BITS;
493 codebook_setup->maxdepth=(codebook_setup->maxdepth+codebook_setup->nb_bits-1)/codebook_setup->nb_bits;
495 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)) {
496 av_log(vc->avccontext, AV_LOG_ERROR, " Error generating vlc tables. \n");
501 av_free(tmp_vlc_bits);
502 av_free(tmp_vlc_codes);
507 av_free(tmp_vlc_bits);
508 av_free(tmp_vlc_codes);
512 // Process time domain transforms part (unused in Vorbis I)
514 static int vorbis_parse_setup_hdr_tdtransforms(vorbis_context *vc) {
515 GetBitContext *gb=&vc->gb;
517 uint_fast8_t vorbis_time_count=get_bits(gb, 6)+1;
519 for(i=0;i<vorbis_time_count;++i) {
520 uint_fast16_t vorbis_tdtransform=get_bits(gb, 16);
522 AV_DEBUG(" Vorbis time domain transform %d: %d \n", vorbis_time_count, vorbis_tdtransform);
524 if (vorbis_tdtransform) {
525 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis time domain transform data nonzero. \n");
532 // Process floors part
534 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
535 vorbis_floor_data *vfu, float *vec);
536 static void create_map( vorbis_context * vc, uint_fast8_t floor_number );
537 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc,
538 vorbis_floor_data *vfu, float *vec);
539 static int vorbis_parse_setup_hdr_floors(vorbis_context *vc) {
540 GetBitContext *gb=&vc->gb;
543 vc->floor_count=get_bits(gb, 6)+1;
545 vc->floors=(vorbis_floor *)av_mallocz(vc->floor_count * sizeof(vorbis_floor));
547 for (i=0;i<vc->floor_count;++i) {
548 vorbis_floor *floor_setup=&vc->floors[i];
550 floor_setup->floor_type=get_bits(gb, 16);
552 AV_DEBUG(" %d. floor type %d \n", i, floor_setup->floor_type);
554 if (floor_setup->floor_type==1) {
555 uint_fast8_t maximum_class=0;
556 uint_fast8_t rangebits;
557 uint_fast16_t floor1_values=2;
559 floor_setup->decode=vorbis_floor1_decode;
561 floor_setup->data.t1.partitions=get_bits(gb, 5);
563 AV_DEBUG(" %d.floor: %d partitions \n", i, floor_setup->data.t1.partitions);
565 for(j=0;j<floor_setup->data.t1.partitions;++j) {
566 floor_setup->data.t1.partition_class[j]=get_bits(gb, 4);
567 if (floor_setup->data.t1.partition_class[j]>maximum_class) maximum_class=floor_setup->data.t1.partition_class[j];
569 AV_DEBUG(" %d. floor %d partition class %d \n", i, j, floor_setup->data.t1.partition_class[j]);
573 AV_DEBUG(" maximum class %d \n", maximum_class);
575 floor_setup->data.t1.maximum_class=maximum_class;
577 for(j=0;j<=maximum_class;++j) {
578 floor_setup->data.t1.class_dimensions[j]=get_bits(gb, 3)+1;
579 floor_setup->data.t1.class_subclasses[j]=get_bits(gb, 2);
581 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]);
583 if (floor_setup->data.t1.class_subclasses[j]) {
584 floor_setup->data.t1.class_masterbook[j]=get_bits(gb, 8);
586 AV_DEBUG(" masterbook: %d \n", floor_setup->data.t1.class_masterbook[j]);
589 for(k=0;k<(1<<floor_setup->data.t1.class_subclasses[j]);++k) {
590 floor_setup->data.t1.subclass_books[j][k]=(int16_t)get_bits(gb, 8)-1;
592 AV_DEBUG(" book %d. : %d \n", k, floor_setup->data.t1.subclass_books[j][k]);
596 floor_setup->data.t1.multiplier=get_bits(gb, 2)+1;
597 floor_setup->data.t1.x_list_dim=2;
599 for(j=0;j<floor_setup->data.t1.partitions;++j) {
600 floor_setup->data.t1.x_list_dim+=floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];
603 floor_setup->data.t1.x_list=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
604 floor_setup->data.t1.x_list_order=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
605 floor_setup->data.t1.low_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
606 floor_setup->data.t1.high_neighbour=(uint_fast16_t *)av_mallocz(floor_setup->data.t1.x_list_dim * sizeof(uint_fast16_t));
609 rangebits=get_bits(gb, 4);
610 floor_setup->data.t1.x_list[0] = 0;
611 floor_setup->data.t1.x_list[1] = (1<<rangebits);
613 for(j=0;j<floor_setup->data.t1.partitions;++j) {
614 for(k=0;k<floor_setup->data.t1.class_dimensions[floor_setup->data.t1.partition_class[j]];++k,++floor1_values) {
615 floor_setup->data.t1.x_list[floor1_values]=get_bits(gb, rangebits);
617 AV_DEBUG(" %d. floor1 Y coord. %d \n", floor1_values, floor_setup->data.t1.x_list[floor1_values]);
621 // Precalculate order of x coordinates - needed for decode
623 for(k=0;k<floor_setup->data.t1.x_list_dim;++k) {
624 floor_setup->data.t1.x_list_order[k]=k;
627 for(k=0;k<floor_setup->data.t1.x_list_dim-1;++k) { // FIXME optimize sorting ?
628 for(j=k+1;j<floor_setup->data.t1.x_list_dim;++j) {
629 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]]) {
630 uint_fast16_t tmp=floor_setup->data.t1.x_list_order[k];
631 floor_setup->data.t1.x_list_order[k]=floor_setup->data.t1.x_list_order[j];
632 floor_setup->data.t1.x_list_order[j]=tmp;
637 // Precalculate low and high neighbours
639 for(k=2;k<floor_setup->data.t1.x_list_dim;++k) {
640 floor_setup->data.t1.low_neighbour[k]=0;
641 floor_setup->data.t1.high_neighbour[k]=1; // correct according to SPEC requirements
644 if ((floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[k]) &&
645 (floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[floor_setup->data.t1.low_neighbour[k]])) {
646 floor_setup->data.t1.low_neighbour[k]=j;
648 if ((floor_setup->data.t1.x_list[j]>floor_setup->data.t1.x_list[k]) &&
649 (floor_setup->data.t1.x_list[j]<floor_setup->data.t1.x_list[floor_setup->data.t1.high_neighbour[k]])) {
650 floor_setup->data.t1.high_neighbour[k]=j;
655 else if(floor_setup->floor_type==0) {
656 uint_fast8_t max_codebook_dim=0;
658 floor_setup->decode=vorbis_floor0_decode;
660 floor_setup->data.t0.order=get_bits(gb, 8);
661 floor_setup->data.t0.rate=get_bits(gb, 16);
662 floor_setup->data.t0.bark_map_size=get_bits(gb, 16);
663 floor_setup->data.t0.amplitude_bits=get_bits(gb, 6);
664 /* zero would result in a div by zero later *
666 if (floor_setup->data.t0.amplitude_bits == 0) {
667 av_log(vc->avccontext, AV_LOG_ERROR,
668 "Floor 0 amplitude bits is 0.\n");
671 floor_setup->data.t0.amplitude_offset=get_bits(gb, 8);
672 floor_setup->data.t0.num_books=get_bits(gb, 4)+1;
674 /* allocate mem for booklist */
675 floor_setup->data.t0.book_list=
676 av_malloc(floor_setup->data.t0.num_books);
677 if(!floor_setup->data.t0.book_list) { return 1; }
678 /* read book indexes */
681 uint_fast8_t book_idx;
682 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
683 book_idx=get_bits(gb, 8);
684 floor_setup->data.t0.book_list[idx]=book_idx;
685 if (vc->codebooks[book_idx].dimensions > max_codebook_dim)
686 max_codebook_dim=vc->codebooks[book_idx].dimensions;
688 if (floor_setup->data.t0.book_list[idx]>vc->codebook_count)
695 /* allocate mem for lsp coefficients */
697 /* codebook dim is for padding if codebook dim doesn't *
698 * divide order+1 then we need to read more data */
699 floor_setup->data.t0.lsp=
700 av_malloc((floor_setup->data.t0.order+1 + max_codebook_dim)
702 if(!floor_setup->data.t0.lsp) { return 1; }
705 #ifdef V_DEBUG /* debug output parsed headers */
706 AV_DEBUG("floor0 order: %u\n", floor_setup->data.t0.order);
707 AV_DEBUG("floor0 rate: %u\n", floor_setup->data.t0.rate);
708 AV_DEBUG("floor0 bark map size: %u\n",
709 floor_setup->data.t0.bark_map_size);
710 AV_DEBUG("floor0 amplitude bits: %u\n",
711 floor_setup->data.t0.amplitude_bits);
712 AV_DEBUG("floor0 amplitude offset: %u\n",
713 floor_setup->data.t0.amplitude_offset);
714 AV_DEBUG("floor0 number of books: %u\n",
715 floor_setup->data.t0.num_books);
716 AV_DEBUG("floor0 book list pointer: %p\n",
717 floor_setup->data.t0.book_list);
720 for (idx=0;idx<floor_setup->data.t0.num_books;++idx) {
721 AV_DEBUG( " Book %d: %u\n",
723 floor_setup->data.t0.book_list[idx] );
729 av_log(vc->avccontext, AV_LOG_ERROR, "Invalid floor type!\n");
736 // Process residues part
738 static int vorbis_parse_setup_hdr_residues(vorbis_context *vc){
739 GetBitContext *gb=&vc->gb;
740 uint_fast8_t i, j, k;
742 vc->residue_count=get_bits(gb, 6)+1;
743 vc->residues=(vorbis_residue *)av_mallocz(vc->residue_count * sizeof(vorbis_residue));
745 AV_DEBUG(" There are %d residues. \n", vc->residue_count);
747 for(i=0;i<vc->residue_count;++i) {
748 vorbis_residue *res_setup=&vc->residues[i];
749 uint_fast8_t cascade[64];
750 uint_fast8_t high_bits;
751 uint_fast8_t low_bits;
753 res_setup->type=get_bits(gb, 16);
755 AV_DEBUG(" %d. residue type %d \n", i, res_setup->type);
757 res_setup->begin=get_bits(gb, 24);
758 res_setup->end=get_bits(gb, 24);
759 res_setup->partition_size=get_bits(gb, 24)+1;
760 res_setup->classifications=get_bits(gb, 6)+1;
761 res_setup->classbook=get_bits(gb, 8);
763 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,
764 res_setup->classifications, res_setup->classbook);
766 for(j=0;j<res_setup->classifications;++j) {
768 low_bits=get_bits(gb, 3);
770 high_bits=get_bits(gb, 5);
772 cascade[j]=(high_bits<<3)+low_bits;
774 AV_DEBUG(" %d class casscade depth: %d \n", j, ilog(cascade[j]));
777 res_setup->maxpass=0;
778 for(j=0;j<res_setup->classifications;++j) {
780 if (cascade[j]&(1<<k)) {
781 res_setup->books[j][k]=get_bits(gb, 8);
783 AV_DEBUG(" %d class casscade depth %d book: %d \n", j, k, res_setup->books[j][k]);
785 if (k>res_setup->maxpass) {
786 res_setup->maxpass=k;
789 res_setup->books[j][k]=-1;
797 // Process mappings part
799 static int vorbis_parse_setup_hdr_mappings(vorbis_context *vc) {
800 GetBitContext *gb=&vc->gb;
803 vc->mapping_count=get_bits(gb, 6)+1;
804 vc->mappings=(vorbis_mapping *)av_mallocz(vc->mapping_count * sizeof(vorbis_mapping));
806 AV_DEBUG(" There are %d mappings. \n", vc->mapping_count);
808 for(i=0;i<vc->mapping_count;++i) {
809 vorbis_mapping *mapping_setup=&vc->mappings[i];
811 if (get_bits(gb, 16)) {
812 av_log(vc->avccontext, AV_LOG_ERROR, "Other mappings than type 0 are not compliant with the Vorbis I specification. \n");
816 mapping_setup->submaps=get_bits(gb, 4)+1;
818 mapping_setup->submaps=1;
822 mapping_setup->coupling_steps=get_bits(gb, 8)+1;
823 mapping_setup->magnitude=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
824 mapping_setup->angle=(uint_fast8_t *)av_mallocz(mapping_setup->coupling_steps * sizeof(uint_fast8_t));
825 for(j=0;j<mapping_setup->coupling_steps;++j) {
826 mapping_setup->magnitude[j]=get_bits(gb, ilog(vc->audio_channels-1));
827 mapping_setup->angle[j]=get_bits(gb, ilog(vc->audio_channels-1));
828 // FIXME: sanity checks
831 mapping_setup->coupling_steps=0;
834 AV_DEBUG(" %d mapping coupling steps: %d \n", i, mapping_setup->coupling_steps);
836 if(get_bits(gb, 2)) {
837 av_log(vc->avccontext, AV_LOG_ERROR, "%d. mapping setup data invalid. \n", i);
838 return 1; // following spec.
841 if (mapping_setup->submaps>1) {
842 mapping_setup->mux=(uint_fast8_t *)av_mallocz(vc->audio_channels * sizeof(uint_fast8_t));
843 for(j=0;j<vc->audio_channels;++j) {
844 mapping_setup->mux[j]=get_bits(gb, 4);
848 for(j=0;j<mapping_setup->submaps;++j) {
849 get_bits(gb, 8); // FIXME check?
850 mapping_setup->submap_floor[j]=get_bits(gb, 8);
851 mapping_setup->submap_residue[j]=get_bits(gb, 8);
853 AV_DEBUG(" %d mapping %d submap : floor %d, residue %d \n", i, j, mapping_setup->submap_floor[j], mapping_setup->submap_residue[j]);
859 // Process modes part
861 static void create_map( vorbis_context * vc, uint_fast8_t floor_number )
863 vorbis_floor * floors=vc->floors;
866 int_fast8_t blockflag;
868 int_fast32_t n; //TODO: could theoretically be smaller?
870 for (blockflag=0;blockflag<2;++blockflag)
872 n=vc->blocksize[blockflag]/2;
873 floors[floor_number].data.t0.map[blockflag]=
874 av_malloc((n+1) * sizeof(int_fast32_t)); // n+sentinel
876 map=floors[floor_number].data.t0.map[blockflag];
877 vf=&floors[floor_number].data.t0;
879 for (idx=0; idx<n;++idx) {
880 map[idx]=floor( BARK((vf->rate*idx)/(2.0f*n)) *
881 ((vf->bark_map_size)/
882 BARK(vf->rate/2.0f )) );
883 if (vf->bark_map_size-1 < map[idx]) {
884 map[idx]=vf->bark_map_size-1;
888 vf->map_size[blockflag]=n;
892 for(idx=0;idx<=n;++idx) {
893 AV_DEBUG("floor0 map: map at pos %d is %d\n",
899 static int vorbis_parse_setup_hdr_modes(vorbis_context *vc) {
900 GetBitContext *gb=&vc->gb;
903 vc->mode_count=get_bits(gb, 6)+1;
904 vc->modes=(vorbis_mode *)av_mallocz(vc->mode_count * sizeof(vorbis_mode));
906 AV_DEBUG(" There are %d modes.\n", vc->mode_count);
908 for(i=0;i<vc->mode_count;++i) {
909 vorbis_mode *mode_setup=&vc->modes[i];
911 mode_setup->blockflag=get_bits(gb, 1);
912 mode_setup->windowtype=get_bits(gb, 16); //FIXME check
913 mode_setup->transformtype=get_bits(gb, 16); //FIXME check
914 mode_setup->mapping=get_bits(gb, 8); //FIXME check
916 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);
921 // Process the whole setup header using the functions above
923 static int vorbis_parse_setup_hdr(vorbis_context *vc) {
924 GetBitContext *gb=&vc->gb;
926 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
927 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
928 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
929 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (no vorbis signature). \n");
933 if (vorbis_parse_setup_hdr_codebooks(vc)) {
934 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (codebooks). \n");
937 if (vorbis_parse_setup_hdr_tdtransforms(vc)) {
938 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (time domain transforms). \n");
941 if (vorbis_parse_setup_hdr_floors(vc)) {
942 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (floors). \n");
945 if (vorbis_parse_setup_hdr_residues(vc)) {
946 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (residues). \n");
949 if (vorbis_parse_setup_hdr_mappings(vc)) {
950 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (mappings). \n");
953 if (vorbis_parse_setup_hdr_modes(vc)) {
954 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (modes). \n");
957 if (!get_bits1(gb)) {
958 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis setup header packet corrupt (framing flag). \n");
959 return 8; // framing flag bit unset error
965 // Process the identification header
967 static int vorbis_parse_id_hdr(vorbis_context *vc){
968 GetBitContext *gb=&vc->gb;
969 uint_fast8_t bl0, bl1;
971 if ((get_bits(gb, 8)!='v') || (get_bits(gb, 8)!='o') ||
972 (get_bits(gb, 8)!='r') || (get_bits(gb, 8)!='b') ||
973 (get_bits(gb, 8)!='i') || (get_bits(gb, 8)!='s')) {
974 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (no vorbis signature). \n");
978 vc->version=get_bits_long(gb, 32); //FIXME check 0
979 vc->audio_channels=get_bits(gb, 8); //FIXME check >0
980 vc->audio_samplerate=get_bits_long(gb, 32); //FIXME check >0
981 vc->bitrate_maximum=get_bits_long(gb, 32);
982 vc->bitrate_nominal=get_bits_long(gb, 32);
983 vc->bitrate_minimum=get_bits_long(gb, 32);
986 vc->blocksize[0]=(1<<bl0);
987 vc->blocksize[1]=(1<<bl1);
988 if (bl0>13 || bl0<6 || bl1>13 || bl1<6 || bl1<bl0) {
989 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (illegal blocksize). \n");
992 // output format int16
993 if (vc->blocksize[1]/2 * vc->audio_channels * 2 >
994 AVCODEC_MAX_AUDIO_FRAME_SIZE) {
995 av_log(vc->avccontext, AV_LOG_ERROR, "Vorbis channel count makes "
996 "output packets too large.\n");
999 vc->win[0]=ff_vorbis_vwin[bl0-6];
1000 vc->win[1]=ff_vorbis_vwin[bl1-6];
1005 float *win = av_malloc(vc->blocksize[j]/2 * sizeof(float));
1006 for(i=0; i<vc->blocksize[j]/2; i++)
1007 win[i] = vc->win[j][i] * (1<<15);
1012 if ((get_bits1(gb)) == 0) {
1013 av_log(vc->avccontext, AV_LOG_ERROR, " Vorbis id header packet corrupt (framing flag not set). \n");
1017 vc->channel_residues=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1018 vc->channel_floors=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1019 vc->saved=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1020 vc->ret=(float *)av_malloc((vc->blocksize[1]/2)*vc->audio_channels * sizeof(float));
1021 vc->buf=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1022 vc->buf_tmp=(float *)av_malloc(vc->blocksize[1] * sizeof(float));
1025 ff_mdct_init(&vc->mdct[0], bl0, 1);
1026 ff_mdct_init(&vc->mdct[1], bl1, 1);
1028 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 ",
1029 vc->version, vc->audio_channels, vc->audio_samplerate, vc->bitrate_maximum, vc->bitrate_nominal, vc->bitrate_minimum, vc->blocksize[0], vc->blocksize[1]);
1032 BLK=vc->blocksize[0];
1033 for(i=0;i<BLK/2;++i) {
1034 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)));
1041 // Process the extradata using the functions above (identification header, setup header)
1043 static int vorbis_decode_init(AVCodecContext *avccontext) {
1044 vorbis_context *vc = avccontext->priv_data ;
1045 uint8_t *headers = avccontext->extradata;
1046 int headers_len=avccontext->extradata_size;
1047 uint8_t *header_start[3];
1049 GetBitContext *gb = &(vc->gb);
1052 vc->avccontext = avccontext;
1053 dsputil_init(&vc->dsp, avccontext);
1055 if(vc->dsp.float_to_int16 == ff_float_to_int16_c) {
1060 vc->exp_bias = 15<<23;
1064 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1068 if(headers[0] == 0 && headers[1] == 30) {
1069 for(i = 0; i < 3; i++){
1070 header_len[i] = *headers++ << 8;
1071 header_len[i] += *headers++;
1072 header_start[i] = headers;
1073 headers += header_len[i];
1075 } else if(headers[0] == 2) {
1076 for(j=1,i=0;i<2;++i, ++j) {
1078 while(j<headers_len && headers[j]==0xff) {
1079 header_len[i]+=0xff;
1082 if (j>=headers_len) {
1083 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1086 header_len[i]+=headers[j];
1088 header_len[2]=headers_len-header_len[0]-header_len[1]-j;
1090 header_start[0] = headers;
1091 header_start[1] = header_start[0] + header_len[0];
1092 header_start[2] = header_start[1] + header_len[1];
1094 av_log(avccontext, AV_LOG_ERROR, "Extradata corrupt.\n");
1098 init_get_bits(gb, header_start[0], header_len[0]*8);
1099 hdr_type=get_bits(gb, 8);
1101 av_log(avccontext, AV_LOG_ERROR, "First header is not the id header.\n");
1104 if (vorbis_parse_id_hdr(vc)) {
1105 av_log(avccontext, AV_LOG_ERROR, "Id header corrupt.\n");
1110 init_get_bits(gb, header_start[2], header_len[2]*8);
1111 hdr_type=get_bits(gb, 8);
1113 av_log(avccontext, AV_LOG_ERROR, "Third header is not the setup header.\n");
1116 if (vorbis_parse_setup_hdr(vc)) {
1117 av_log(avccontext, AV_LOG_ERROR, "Setup header corrupt.\n");
1122 avccontext->channels = vc->audio_channels;
1123 avccontext->sample_rate = vc->audio_samplerate;
1128 // Decode audiopackets -------------------------------------------------
1130 // Read and decode floor
1132 static uint_fast8_t vorbis_floor0_decode(vorbis_context *vc,
1133 vorbis_floor_data *vfu, float *vec) {
1134 vorbis_floor0 * vf=&vfu->t0;
1135 float * lsp=vf->lsp;
1136 uint_fast32_t amplitude;
1137 uint_fast32_t book_idx;
1138 uint_fast8_t blockflag=vc->modes[vc->mode_number].blockflag;
1140 amplitude=get_bits(&vc->gb, vf->amplitude_bits);
1143 uint_fast16_t lsp_len = 0;
1145 vorbis_codebook codebook;
1147 book_idx=get_bits(&vc->gb, ilog(vf->num_books));
1148 if ( book_idx >= vf->num_books ) {
1149 av_log( vc->avccontext, AV_LOG_ERROR,
1150 "floor0 dec: booknumber too high!\n" );
1153 AV_DEBUG( "floor0 dec: booknumber: %u\n", book_idx );
1154 codebook=vc->codebooks[vf->book_list[book_idx]];
1156 while (lsp_len<vf->order) {
1159 AV_DEBUG( "floor0 dec: book dimension: %d\n", codebook.dimensions );
1160 AV_DEBUG( "floor0 dec: maximum depth: %d\n", codebook.maxdepth );
1161 /* read temp vector */
1162 vec_off=get_vlc2(&vc->gb,
1165 codebook.maxdepth ) *
1166 codebook.dimensions;
1167 AV_DEBUG( "floor0 dec: vector offset: %d\n", vec_off );
1168 /* copy each vector component and add last to it */
1169 for (idx=0; idx<codebook.dimensions; ++idx) {
1170 lsp[lsp_len+idx]=codebook.codevectors[vec_off+idx]+last;
1172 last=lsp[lsp_len+idx-1]; /* set last to last vector component */
1174 lsp_len += codebook.dimensions;
1177 /* DEBUG: output lsp coeffs */
1180 for ( idx = 0; idx < lsp_len; ++idx )
1181 AV_DEBUG("floor0 dec: coeff at %d is %f\n", idx, lsp[idx] );
1185 /* synthesize floor output vector */
1188 int order=vf->order;
1189 float wstep=M_PI/vf->bark_map_size;
1191 for(i=0;i<order;i++) { lsp[i]=2.0f*cos(lsp[i]); }
1193 AV_DEBUG("floor0 synth: map_size=%d; m=%d; wstep=%f\n",
1194 vf->map_size, order, wstep);
1197 while(i<vf->map_size[blockflag]) {
1198 int j, iter_cond=vf->map[blockflag][i];
1201 float two_cos_w=2.0f*cos(wstep*iter_cond); // needed all times
1203 /* similar part for the q and p products */
1204 for(j=0;j<order;j+=2) {
1205 q *= lsp[j] -two_cos_w;
1206 p *= lsp[j+1]-two_cos_w;
1208 if(j==order) { // even order
1209 p *= p*(2.0f-two_cos_w);
1210 q *= q*(2.0f+two_cos_w);
1213 q *= two_cos_w-lsp[j]; // one more time for q
1215 /* final step and square */
1216 p *= p*(4.f-two_cos_w*two_cos_w);
1220 /* calculate linear floor value */
1223 ( (amplitude*vf->amplitude_offset)/
1224 (((1<<vf->amplitude_bits)-1) * sqrt(p+q)) )
1225 - vf->amplitude_offset ) * .11512925f
1230 do { vec[i]=q; ++i; }while(vf->map[blockflag][i]==iter_cond);
1235 /* this channel is unused */
1239 AV_DEBUG(" Floor0 decoded\n");
1243 static uint_fast8_t vorbis_floor1_decode(vorbis_context *vc, vorbis_floor_data *vfu, float *vec) {
1244 vorbis_floor1 * vf=&vfu->t1;
1245 GetBitContext *gb=&vc->gb;
1246 uint_fast16_t range_v[4]={ 256, 128, 86, 64 };
1247 uint_fast16_t range=range_v[vf->multiplier-1];
1248 uint_fast16_t floor1_Y[vf->x_list_dim];
1249 uint_fast16_t floor1_Y_final[vf->x_list_dim];
1250 uint_fast8_t floor1_flag[vf->x_list_dim];
1251 uint_fast8_t class_;
1257 uint_fast16_t offset;
1259 uint_fast16_t *floor_x_sort=vf->x_list_order;
1260 /*u*/int_fast16_t adx, ady, off, predicted; // WTF ? dy/adx= (unsigned)dy/adx ?
1261 int_fast16_t dy, err;
1262 uint_fast16_t lx,hx, ly, hy=0;
1265 if (!get_bits1(gb)) return 1; // silence
1267 // Read values (or differences) for the floor's points
1269 floor1_Y[0]=get_bits(gb, ilog(range-1));
1270 floor1_Y[1]=get_bits(gb, ilog(range-1));
1272 AV_DEBUG("floor 0 Y %d floor 1 Y %d \n", floor1_Y[0], floor1_Y[1]);
1275 for(i=0;i<vf->partitions;++i) {
1276 class_=vf->partition_class[i];
1277 cdim=vf->class_dimensions[class_];
1278 cbits=vf->class_subclasses[class_];
1282 AV_DEBUG("Cbits %d \n", cbits);
1284 if (cbits) { // this reads all subclasses for this partition's class
1285 cval=get_vlc2(gb, vc->codebooks[vf->class_masterbook[class_]].vlc.table,
1286 vc->codebooks[vf->class_masterbook[class_]].nb_bits, 3);
1289 for(j=0;j<cdim;++j) {
1290 book=vf->subclass_books[class_][cval & csub];
1292 AV_DEBUG("book %d Cbits %d cval %d bits:%d \n", book, cbits, cval, get_bits_count(gb));
1296 floor1_Y[offset+j]=get_vlc2(gb, vc->codebooks[book].vlc.table,
1297 vc->codebooks[book].nb_bits, 3);
1299 floor1_Y[offset+j]=0;
1302 AV_DEBUG(" floor(%d) = %d \n", vf->x_list[offset+j], floor1_Y[offset+j]);
1307 // Amplitude calculation from the differences
1311 floor1_Y_final[0]=floor1_Y[0];
1312 floor1_Y_final[1]=floor1_Y[1];
1314 for(i=2;i<vf->x_list_dim;++i) {
1315 uint_fast16_t val, highroom, lowroom, room;
1316 uint_fast16_t high_neigh_offs;
1317 uint_fast16_t low_neigh_offs;
1319 low_neigh_offs=vf->low_neighbour[i];
1320 high_neigh_offs=vf->high_neighbour[i];
1321 dy=floor1_Y_final[high_neigh_offs]-floor1_Y_final[low_neigh_offs]; // render_point begin
1322 adx=vf->x_list[high_neigh_offs]-vf->x_list[low_neigh_offs];
1324 err=ady*(vf->x_list[i]-vf->x_list[low_neigh_offs]);
1325 off=(int16_t)err/(int16_t)adx;
1327 predicted=floor1_Y_final[low_neigh_offs]-off;
1329 predicted=floor1_Y_final[low_neigh_offs]+off;
1330 } // render_point end
1333 highroom=range-predicted;
1335 if (highroom < lowroom) {
1338 room=lowroom*2; // SPEC mispelling
1341 floor1_flag[low_neigh_offs]=1;
1342 floor1_flag[high_neigh_offs]=1;
1345 if (highroom > lowroom) {
1346 floor1_Y_final[i]=val-lowroom+predicted;
1348 floor1_Y_final[i]=predicted-val+highroom-1;
1352 floor1_Y_final[i]=predicted-(val+1)/2;
1354 floor1_Y_final[i]=predicted+val/2;
1359 floor1_Y_final[i]=predicted;
1362 AV_DEBUG(" Decoded floor(%d) = %d / val %d \n", vf->x_list[i], floor1_Y_final[i], val);
1365 // Curve synth - connect the calculated dots and convert from dB scale FIXME optimize ?
1369 ly=floor1_Y_final[0]*vf->multiplier; // conforms to SPEC
1371 vec[0]=ff_vorbis_floor1_inverse_db_table[ly];
1373 for(i=1;i<vf->x_list_dim;++i) {
1374 AV_DEBUG(" Looking at post %d \n", i);
1376 if (floor1_flag[floor_x_sort[i]]) { // SPEC mispelled
1377 int_fast16_t x, y, dy, base, sy; // if uncommented: dy = -32 adx = 2 base = 2blablabla ?????
1379 hy=floor1_Y_final[floor_x_sort[i]]*vf->multiplier;
1380 hx=vf->x_list[floor_x_sort[i]];
1384 ady= (dy<0) ? -dy:dy;//ABS(dy);
1385 base=(int16_t)dy/(int16_t)adx;
1387 AV_DEBUG(" dy %d adx %d base %d = %d \n", dy, adx, base, dy/adx);
1397 ady=ady-(base<0 ? -base : base)*adx;
1398 vec[x]=ff_vorbis_floor1_inverse_db_table[y];
1400 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1402 for(x=lx+1;(x<hx) && (x<vf->x_list[1]);++x) {
1410 vec[x]=ff_vorbis_floor1_inverse_db_table[y];
1412 AV_DEBUG(" vec[ %d ] = %d \n", x, y);
1415 /* for(j=1;j<hx-lx+1;++j) { // iterating render_point
1418 ady= dy<0 ? -dy : dy;
1426 if (lx+j < vf->x_list[1]) {
1427 vec[lx+j]=ff_vorbis_floor1_inverse_db_table[predicted];
1436 if (hx<vf->x_list[1]) {
1437 for(i=hx;i<vf->x_list[1];++i) {
1438 vec[i]=ff_vorbis_floor1_inverse_db_table[hy];
1442 AV_DEBUG(" Floor decoded\n");
1447 // Read and decode residue
1449 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) {
1450 GetBitContext *gb=&vc->gb;
1451 uint_fast8_t c_p_c=vc->codebooks[vr->classbook].dimensions;
1452 uint_fast16_t n_to_read=vr->end-vr->begin;
1453 uint_fast16_t ptns_to_read=n_to_read/vr->partition_size;
1454 uint_fast8_t classifs[ptns_to_read*vc->audio_channels];
1456 uint_fast8_t ch_used;
1462 do_not_decode[0]&=do_not_decode[j]; // FIXME - clobbering input
1464 if (do_not_decode[0]) return 0;
1470 AV_DEBUG(" residue type 0/1/2 decode begin, ch: %d cpc %d \n", ch, c_p_c);
1472 for(pass=0;pass<=vr->maxpass;++pass) { // FIXME OPTIMIZE?
1473 uint_fast16_t voffset;
1474 uint_fast16_t partition_count;
1475 uint_fast16_t j_times_ptns_to_read;
1478 for(partition_count=0;partition_count<ptns_to_read;) { // SPEC error
1480 uint_fast32_t inverse_class = inverse[vr->classifications];
1481 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1482 if (!do_not_decode[j]) {
1483 uint_fast32_t temp=get_vlc2(gb, vc->codebooks[vr->classbook].vlc.table,
1484 vc->codebooks[vr->classbook].nb_bits, 3);
1486 AV_DEBUG("Classword: %d \n", temp);
1488 assert(vr->classifications > 1 && temp<=65536); //needed for inverse[]
1489 for(i=0;i<c_p_c;++i) {
1490 uint_fast32_t temp2;
1492 temp2=(((uint_fast64_t)temp) * inverse_class)>>32;
1493 if (partition_count+c_p_c-1-i < ptns_to_read) {
1494 classifs[j_times_ptns_to_read+partition_count+c_p_c-1-i]=temp-temp2*vr->classifications;
1499 j_times_ptns_to_read+=ptns_to_read;
1502 for(i=0;(i<c_p_c) && (partition_count<ptns_to_read);++i) {
1503 for(j_times_ptns_to_read=0, j=0;j<ch_used;++j) {
1504 uint_fast16_t voffs;
1506 if (!do_not_decode[j]) {
1507 uint_fast8_t vqclass=classifs[j_times_ptns_to_read+partition_count];
1508 int_fast16_t vqbook=vr->books[vqclass][pass];
1511 uint_fast16_t coffs;
1512 unsigned dim= vc->codebooks[vqbook].dimensions; // not uint_fast8_t: 64bit is slower here on amd64
1513 uint_fast16_t step= dim==1 ? vr->partition_size
1514 : FASTDIV(vr->partition_size, dim);
1515 vorbis_codebook codebook= vc->codebooks[vqbook];
1519 voffs=voffset+j*vlen;
1520 for(k=0;k<step;++k) {
1521 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1522 for(l=0;l<dim;++l) {
1523 vec[voffs+k+l*step]+=codebook.codevectors[coffs+l]; // FPMATH
1527 else if (vr->type==1) {
1528 voffs=voffset+j*vlen;
1529 for(k=0;k<step;++k) {
1530 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1531 for(l=0;l<dim;++l, ++voffs) {
1532 vec[voffs]+=codebook.codevectors[coffs+l]; // FPMATH
1534 AV_DEBUG(" pass %d offs: %d curr: %f change: %f cv offs.: %d \n", pass, voffs, vec[voffs], codebook.codevectors[coffs+l], coffs);
1538 else if (vr->type==2 && ch==2 && (voffset&1)==0 && (dim&1)==0) { // most frequent case optimized
1542 for(k=0;k<step;++k) {
1543 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * 2;
1544 vec[voffs+k ]+=codebook.codevectors[coffs ]; // FPMATH
1545 vec[voffs+k+vlen]+=codebook.codevectors[coffs+1]; // FPMATH
1548 for(k=0;k<step;++k) {
1549 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1550 for(l=0;l<dim;l+=2, voffs++) {
1551 vec[voffs ]+=codebook.codevectors[coffs+l ]; // FPMATH
1552 vec[voffs+vlen]+=codebook.codevectors[coffs+l+1]; // FPMATH
1554 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);
1559 else if (vr->type==2) {
1562 for(k=0;k<step;++k) {
1563 coffs=get_vlc2(gb, codebook.vlc.table, codebook.nb_bits, 3) * dim;
1564 for(l=0;l<dim;++l, ++voffs) {
1565 vec[voffs/ch+(voffs%ch)*vlen]+=codebook.codevectors[coffs+l]; // FPMATH FIXME use if and counter instead of / and %
1567 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);
1571 av_log(vc->avccontext, AV_LOG_ERROR, " Invalid residue type while residue decode?! \n");
1576 j_times_ptns_to_read+=ptns_to_read;
1579 voffset+=vr->partition_size;
1586 void vorbis_inverse_coupling(float *mag, float *ang, int blocksize)
1589 for(i=0; i<blocksize; i++)
1593 ang[i]=mag[i]-ang[i];
1611 // Decode the audio packet using the functions above
1613 static int vorbis_parse_audio_packet(vorbis_context *vc) {
1614 GetBitContext *gb=&vc->gb;
1616 uint_fast8_t previous_window=0,next_window=0;
1617 uint_fast8_t mode_number;
1618 uint_fast16_t blocksize;
1620 uint_fast8_t no_residue[vc->audio_channels];
1621 uint_fast8_t do_not_decode[vc->audio_channels];
1622 vorbis_mapping *mapping;
1623 float *ch_res_ptr=vc->channel_residues;
1624 float *ch_floor_ptr=vc->channel_floors;
1625 uint_fast8_t res_chan[vc->audio_channels];
1626 uint_fast8_t res_num=0;
1627 int_fast16_t retlen=0;
1628 uint_fast16_t saved_start=0;
1629 float fadd_bias = vc->add_bias;
1631 if (get_bits1(gb)) {
1632 av_log(vc->avccontext, AV_LOG_ERROR, "Not a Vorbis I audio packet.\n");
1633 return -1; // packet type not audio
1636 if (vc->mode_count==1) {
1639 mode_number=get_bits(gb, ilog(vc->mode_count-1));
1641 vc->mode_number=mode_number;
1642 mapping=&vc->mappings[vc->modes[mode_number].mapping];
1644 AV_DEBUG(" Mode number: %d , mapping: %d , blocktype %d \n", mode_number, vc->modes[mode_number].mapping, vc->modes[mode_number].blockflag);
1646 if (vc->modes[mode_number].blockflag) {
1647 previous_window=get_bits1(gb);
1648 next_window=get_bits1(gb);
1651 blocksize=vc->blocksize[vc->modes[mode_number].blockflag];
1652 memset(ch_res_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1653 memset(ch_floor_ptr, 0, sizeof(float)*vc->audio_channels*blocksize/2); //FIXME can this be removed ?
1657 for(i=0;i<vc->audio_channels;++i) {
1658 vorbis_floor *floor;
1659 if (mapping->submaps>1) {
1660 floor=&vc->floors[mapping->submap_floor[mapping->mux[i]]];
1662 floor=&vc->floors[mapping->submap_floor[0]];
1665 no_residue[i]=floor->decode(vc, &floor->data, ch_floor_ptr);
1666 ch_floor_ptr+=blocksize/2;
1669 // Nonzero vector propagate
1671 for(i=mapping->coupling_steps-1;i>=0;--i) {
1672 if (!(no_residue[mapping->magnitude[i]] & no_residue[mapping->angle[i]])) {
1673 no_residue[mapping->magnitude[i]]=0;
1674 no_residue[mapping->angle[i]]=0;
1680 for(i=0;i<mapping->submaps;++i) {
1681 vorbis_residue *residue;
1684 for(j=0;j<vc->audio_channels;++j) {
1685 if ((mapping->submaps==1) || (i=mapping->mux[j])) {
1686 res_chan[j]=res_num;
1687 if (no_residue[j]) {
1688 do_not_decode[ch]=1;
1690 do_not_decode[ch]=0;
1696 residue=&vc->residues[mapping->submap_residue[i]];
1697 vorbis_residue_decode(vc, residue, ch, do_not_decode, ch_res_ptr, blocksize/2);
1699 ch_res_ptr+=ch*blocksize/2;
1704 for(i=mapping->coupling_steps-1;i>=0;--i) { //warning: i has to be signed
1707 mag=vc->channel_residues+res_chan[mapping->magnitude[i]]*blocksize/2;
1708 ang=vc->channel_residues+res_chan[mapping->angle[i]]*blocksize/2;
1709 vc->dsp.vorbis_inverse_coupling(mag, ang, blocksize/2);
1714 for(j=0, ch_floor_ptr=vc->channel_floors;j<vc->audio_channels;++j,ch_floor_ptr+=blocksize/2) {
1715 ch_res_ptr=vc->channel_residues+res_chan[j]*blocksize/2;
1716 vc->dsp.vector_fmul(ch_floor_ptr, ch_res_ptr, blocksize/2);
1719 // MDCT, overlap/add, save data for next overlapping FPMATH
1721 for(j=0;j<vc->audio_channels;++j) {
1722 uint_fast8_t step=vc->audio_channels;
1724 float *saved=vc->saved+j*vc->blocksize[1]/2;
1726 const float *lwin=vc->win[1];
1727 const float *swin=vc->win[0];
1729 float *buf_tmp=vc->buf_tmp;
1731 ch_floor_ptr=vc->channel_floors+j*blocksize/2;
1733 saved_start=vc->saved_start;
1735 vc->mdct[0].fft.imdct_calc(&vc->mdct[vc->modes[mode_number].blockflag], buf, ch_floor_ptr, buf_tmp);
1737 //FIXME process channels together, to allow faster simd vector_fmul_add_add?
1738 if (vc->modes[mode_number].blockflag) {
1740 if (previous_window) {
1741 vc->dsp.vector_fmul_add_add(ret+j, buf, lwin, saved, vc->add_bias, vc->blocksize[1]/2, step);
1742 retlen=vc->blocksize[1]/2;
1744 int len = (vc->blocksize[1]-vc->blocksize[0])/4;
1746 vc->dsp.vector_fmul_add_add(ret+j, buf, swin, saved, vc->add_bias, vc->blocksize[0]/2, step);
1747 k = vc->blocksize[0]/2*step + j;
1748 buf += vc->blocksize[0]/2;
1750 for(i=0; i<len; i++, k+=step)
1751 ((uint32_t*)ret)[k] = ((uint32_t*)buf)[i] + vc->exp_bias; // ret[k]=buf[i]*(1<<bias)
1753 for(i=0; i<len; i++, k+=step)
1754 ret[k] = buf[i] + fadd_bias;
1757 retlen=vc->blocksize[0]/2+len;
1761 buf += vc->blocksize[1]/2;
1762 vc->dsp.vector_fmul_reverse(saved, buf, lwin, vc->blocksize[1]/2);
1765 saved_start=(vc->blocksize[1]-vc->blocksize[0])/4;
1766 buf += vc->blocksize[1]/2;
1767 for(i=0; i<saved_start; i++)
1768 ((uint32_t*)saved)[i] = ((uint32_t*)buf)[i] + vc->exp_bias;
1769 vc->dsp.vector_fmul_reverse(saved+saved_start, buf+saved_start, swin, vc->blocksize[0]/2);
1774 for(k=j, i=0;i<saved_start;++i, k+=step)
1775 ret[k] = saved[i] + fadd_bias;
1777 for(k=j, i=0;i<saved_start;++i, k+=step)
1780 vc->dsp.vector_fmul_add_add(ret+k, buf, swin, saved+saved_start, vc->add_bias, vc->blocksize[0]/2, step);
1781 retlen=saved_start+vc->blocksize[0]/2;
1783 buf += vc->blocksize[0]/2;
1784 vc->dsp.vector_fmul_reverse(saved, buf, swin, vc->blocksize[0]/2);
1788 vc->saved_start=saved_start;
1790 return retlen*vc->audio_channels;
1793 // Return the decoded audio packet through the standard api
1795 static int vorbis_decode_frame(AVCodecContext *avccontext,
1796 void *data, int *data_size,
1797 uint8_t *buf, int buf_size)
1799 vorbis_context *vc = avccontext->priv_data ;
1800 GetBitContext *gb = &(vc->gb);
1808 AV_DEBUG("packet length %d \n", buf_size);
1810 init_get_bits(gb, buf, buf_size*8);
1812 len=vorbis_parse_audio_packet(vc);
1819 if (!vc->first_frame) {
1825 AV_DEBUG("parsed %d bytes %d bits, returned %d samples (*ch*bits) \n", get_bits_count(gb)/8, get_bits_count(gb)%8, len);
1827 vc->dsp.float_to_int16(data, vc->ret, len);
1835 static int vorbis_decode_close(AVCodecContext *avccontext) {
1836 vorbis_context *vc = avccontext->priv_data;
1843 AVCodec vorbis_decoder = {
1847 sizeof(vorbis_context),
1850 vorbis_decode_close,
1851 vorbis_decode_frame,