media/libvorbis/lib/vorbis_res0.c@97036ab72558
media/libvorbis/lib/vorbis_res0.c
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
1 /********************************************************************
2 * *
3 * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
4 * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
5 * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
6 * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
7 * *
8 * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
9 * by the Xiph.Org Foundation http://www.xiph.org/ *
10 * *
11 ********************************************************************
13 function: residue backend 0, 1 and 2 implementation
14 last mod: $Id: res0.c 19031 2013-12-03 19:20:50Z tterribe $
16 ********************************************************************/
18 /* Slow, slow, slow, simpleminded and did I mention it was slow? The
19 encode/decode loops are coded for clarity and performance is not
20 yet even a nagging little idea lurking in the shadows. Oh and BTW,
21 it's slow. */
23 #include <stdlib.h>
24 #include <string.h>
25 #include <math.h>
26 #include <ogg/ogg.h>
27 #include "vorbis/codec.h"
28 #include "codec_internal.h"
29 #include "registry.h"
30 #include "codebook.h"
31 #include "misc.h"
32 #include "os.h"
34 //#define TRAIN_RES 1
35 //#define TRAIN_RESAUX 1
37 #if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
38 #include <stdio.h>
39 #endif
41 typedef struct {
42 vorbis_info_residue0 *info;
44 int parts;
45 int stages;
46 codebook *fullbooks;
47 codebook *phrasebook;
48 codebook ***partbooks;
50 int partvals;
51 int **decodemap;
53 long postbits;
54 long phrasebits;
55 long frames;
57 #if defined(TRAIN_RES) || defined(TRAIN_RESAUX)
58 int train_seq;
59 long *training_data[8][64];
60 float training_max[8][64];
61 float training_min[8][64];
62 float tmin;
63 float tmax;
64 int submap;
65 #endif
67 } vorbis_look_residue0;
69 void res0_free_info(vorbis_info_residue *i){
70 vorbis_info_residue0 *info=(vorbis_info_residue0 *)i;
71 if(info){
72 memset(info,0,sizeof(*info));
73 _ogg_free(info);
74 }
75 }
77 void res0_free_look(vorbis_look_residue *i){
78 int j;
79 if(i){
81 vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
83 #ifdef TRAIN_RES
84 {
85 int j,k,l;
86 for(j=0;j<look->parts;j++){
87 /*fprintf(stderr,"partition %d: ",j);*/
88 for(k=0;k<8;k++)
89 if(look->training_data[k][j]){
90 char buffer[80];
91 FILE *of;
92 codebook *statebook=look->partbooks[j][k];
94 /* long and short into the same bucket by current convention */
95 sprintf(buffer,"res_sub%d_part%d_pass%d.vqd",look->submap,j,k);
96 of=fopen(buffer,"a");
98 for(l=0;l<statebook->entries;l++)
99 fprintf(of,"%d:%ld\n",l,look->training_data[k][j][l]);
101 fclose(of);
103 /*fprintf(stderr,"%d(%.2f|%.2f) ",k,
104 look->training_min[k][j],look->training_max[k][j]);*/
106 _ogg_free(look->training_data[k][j]);
107 look->training_data[k][j]=NULL;
108 }
109 /*fprintf(stderr,"\n");*/
110 }
111 }
112 fprintf(stderr,"min/max residue: %g::%g\n",look->tmin,look->tmax);
114 /*fprintf(stderr,"residue bit usage %f:%f (%f total)\n",
115 (float)look->phrasebits/look->frames,
116 (float)look->postbits/look->frames,
117 (float)(look->postbits+look->phrasebits)/look->frames);*/
118 #endif
121 /*vorbis_info_residue0 *info=look->info;
123 fprintf(stderr,
124 "%ld frames encoded in %ld phrasebits and %ld residue bits "
125 "(%g/frame) \n",look->frames,look->phrasebits,
126 look->resbitsflat,
127 (look->phrasebits+look->resbitsflat)/(float)look->frames);
129 for(j=0;j<look->parts;j++){
130 long acc=0;
131 fprintf(stderr,"\t[%d] == ",j);
132 for(k=0;k<look->stages;k++)
133 if((info->secondstages[j]>>k)&1){
134 fprintf(stderr,"%ld,",look->resbits[j][k]);
135 acc+=look->resbits[j][k];
136 }
138 fprintf(stderr,":: (%ld vals) %1.2fbits/sample\n",look->resvals[j],
139 acc?(float)acc/(look->resvals[j]*info->grouping):0);
140 }
141 fprintf(stderr,"\n");*/
143 for(j=0;j<look->parts;j++)
144 if(look->partbooks[j])_ogg_free(look->partbooks[j]);
145 _ogg_free(look->partbooks);
146 for(j=0;j<look->partvals;j++)
147 _ogg_free(look->decodemap[j]);
148 _ogg_free(look->decodemap);
150 memset(look,0,sizeof(*look));
151 _ogg_free(look);
152 }
153 }
155 static int ilog(unsigned int v){
156 int ret=0;
157 while(v){
158 ret++;
159 v>>=1;
160 }
161 return(ret);
162 }
164 static int icount(unsigned int v){
165 int ret=0;
166 while(v){
167 ret+=v&1;
168 v>>=1;
169 }
170 return(ret);
171 }
174 void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
175 vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
176 int j,acc=0;
177 oggpack_write(opb,info->begin,24);
178 oggpack_write(opb,info->end,24);
180 oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
181 code with a partitioned book */
182 oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
183 oggpack_write(opb,info->groupbook,8); /* group huffman book */
185 /* secondstages is a bitmask; as encoding progresses pass by pass, a
186 bitmask of one indicates this partition class has bits to write
187 this pass */
188 for(j=0;j<info->partitions;j++){
189 if(ilog(info->secondstages[j])>3){
190 /* yes, this is a minor hack due to not thinking ahead */
191 oggpack_write(opb,info->secondstages[j],3);
192 oggpack_write(opb,1,1);
193 oggpack_write(opb,info->secondstages[j]>>3,5);
194 }else
195 oggpack_write(opb,info->secondstages[j],4); /* trailing zero */
196 acc+=icount(info->secondstages[j]);
197 }
198 for(j=0;j<acc;j++)
199 oggpack_write(opb,info->booklist[j],8);
201 }
203 /* vorbis_info is for range checking */
204 vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
205 int j,acc=0;
206 vorbis_info_residue0 *info=_ogg_calloc(1,sizeof(*info));
207 codec_setup_info *ci=vi->codec_setup;
209 info->begin=oggpack_read(opb,24);
210 info->end=oggpack_read(opb,24);
211 info->grouping=oggpack_read(opb,24)+1;
212 info->partitions=oggpack_read(opb,6)+1;
213 info->groupbook=oggpack_read(opb,8);
215 /* check for premature EOP */
216 if(info->groupbook<0)goto errout;
218 for(j=0;j<info->partitions;j++){
219 int cascade=oggpack_read(opb,3);
220 int cflag=oggpack_read(opb,1);
221 if(cflag<0) goto errout;
222 if(cflag){
223 int c=oggpack_read(opb,5);
224 if(c<0) goto errout;
225 cascade|=(c<<3);
226 }
227 info->secondstages[j]=cascade;
229 acc+=icount(cascade);
230 }
231 for(j=0;j<acc;j++){
232 int book=oggpack_read(opb,8);
233 if(book<0) goto errout;
234 info->booklist[j]=book;
235 }
237 if(info->groupbook>=ci->books)goto errout;
238 for(j=0;j<acc;j++){
239 if(info->booklist[j]>=ci->books)goto errout;
240 if(ci->book_param[info->booklist[j]]->maptype==0)goto errout;
241 }
243 /* verify the phrasebook is not specifying an impossible or
244 inconsistent partitioning scheme. */
245 /* modify the phrasebook ranging check from r16327; an early beta
246 encoder had a bug where it used an oversized phrasebook by
247 accident. These files should continue to be playable, but don't
248 allow an exploit */
249 {
250 int entries = ci->book_param[info->groupbook]->entries;
251 int dim = ci->book_param[info->groupbook]->dim;
252 int partvals = 1;
253 if (dim<1) goto errout;
254 while(dim>0){
255 partvals *= info->partitions;
256 if(partvals > entries) goto errout;
257 dim--;
258 }
259 info->partvals = partvals;
260 }
262 return(info);
263 errout:
264 res0_free_info(info);
265 return(NULL);
266 }
268 vorbis_look_residue *res0_look(vorbis_dsp_state *vd,
269 vorbis_info_residue *vr){
270 vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
271 vorbis_look_residue0 *look=_ogg_calloc(1,sizeof(*look));
272 codec_setup_info *ci=vd->vi->codec_setup;
274 int j,k,acc=0;
275 int dim;
276 int maxstage=0;
277 look->info=info;
279 look->parts=info->partitions;
280 look->fullbooks=ci->fullbooks;
281 look->phrasebook=ci->fullbooks+info->groupbook;
282 dim=look->phrasebook->dim;
284 look->partbooks=_ogg_calloc(look->parts,sizeof(*look->partbooks));
286 for(j=0;j<look->parts;j++){
287 int stages=ilog(info->secondstages[j]);
288 if(stages){
289 if(stages>maxstage)maxstage=stages;
290 look->partbooks[j]=_ogg_calloc(stages,sizeof(*look->partbooks[j]));
291 for(k=0;k<stages;k++)
292 if(info->secondstages[j]&(1<<k)){
293 look->partbooks[j][k]=ci->fullbooks+info->booklist[acc++];
294 #ifdef TRAIN_RES
295 look->training_data[k][j]=_ogg_calloc(look->partbooks[j][k]->entries,
296 sizeof(***look->training_data));
297 #endif
298 }
299 }
300 }
302 look->partvals=1;
303 for(j=0;j<dim;j++)
304 look->partvals*=look->parts;
306 look->stages=maxstage;
307 look->decodemap=_ogg_malloc(look->partvals*sizeof(*look->decodemap));
308 for(j=0;j<look->partvals;j++){
309 long val=j;
310 long mult=look->partvals/look->parts;
311 look->decodemap[j]=_ogg_malloc(dim*sizeof(*look->decodemap[j]));
312 for(k=0;k<dim;k++){
313 long deco=val/mult;
314 val-=deco*mult;
315 mult/=look->parts;
316 look->decodemap[j][k]=deco;
317 }
318 }
319 #if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
320 {
321 static int train_seq=0;
322 look->train_seq=train_seq++;
323 }
324 #endif
325 return(look);
326 }
328 /* break an abstraction and copy some code for performance purposes */
329 static int local_book_besterror(codebook *book,int *a){
330 int dim=book->dim;
331 int i,j,o;
332 int minval=book->minval;
333 int del=book->delta;
334 int qv=book->quantvals;
335 int ze=(qv>>1);
336 int index=0;
337 /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
338 int p[8]={0,0,0,0,0,0,0,0};
340 if(del!=1){
341 for(i=0,o=dim;i<dim;i++){
342 int v = (a[--o]-minval+(del>>1))/del;
343 int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
344 index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
345 p[o]=v*del+minval;
346 }
347 }else{
348 for(i=0,o=dim;i<dim;i++){
349 int v = a[--o]-minval;
350 int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
351 index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
352 p[o]=v*del+minval;
353 }
354 }
356 if(book->c->lengthlist[index]<=0){
357 const static_codebook *c=book->c;
358 int best=-1;
359 /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
360 int e[8]={0,0,0,0,0,0,0,0};
361 int maxval = book->minval + book->delta*(book->quantvals-1);
362 for(i=0;i<book->entries;i++){
363 if(c->lengthlist[i]>0){
364 int this=0;
365 for(j=0;j<dim;j++){
366 int val=(e[j]-a[j]);
367 this+=val*val;
368 }
369 if(best==-1 || this<best){
370 memcpy(p,e,sizeof(p));
371 best=this;
372 index=i;
373 }
374 }
375 /* assumes the value patterning created by the tools in vq/ */
376 j=0;
377 while(e[j]>=maxval)
378 e[j++]=0;
379 if(e[j]>=0)
380 e[j]+=book->delta;
381 e[j]= -e[j];
382 }
383 }
385 if(index>-1){
386 for(i=0;i<dim;i++)
387 *a++ -= p[i];
388 }
390 return(index);
391 }
393 #ifdef TRAIN_RES
394 static int _encodepart(oggpack_buffer *opb,int *vec, int n,
395 codebook *book,long *acc){
396 #else
397 static int _encodepart(oggpack_buffer *opb,int *vec, int n,
398 codebook *book){
399 #endif
400 int i,bits=0;
401 int dim=book->dim;
402 int step=n/dim;
404 for(i=0;i<step;i++){
405 int entry=local_book_besterror(book,vec+i*dim);
407 #ifdef TRAIN_RES
408 if(entry>=0)
409 acc[entry]++;
410 #endif
412 bits+=vorbis_book_encode(book,entry,opb);
414 }
416 return(bits);
417 }
419 static long **_01class(vorbis_block *vb,vorbis_look_residue *vl,
420 int **in,int ch){
421 long i,j,k;
422 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
423 vorbis_info_residue0 *info=look->info;
425 /* move all this setup out later */
426 int samples_per_partition=info->grouping;
427 int possible_partitions=info->partitions;
428 int n=info->end-info->begin;
430 int partvals=n/samples_per_partition;
431 long **partword=_vorbis_block_alloc(vb,ch*sizeof(*partword));
432 float scale=100./samples_per_partition;
434 /* we find the partition type for each partition of each
435 channel. We'll go back and do the interleaved encoding in a
436 bit. For now, clarity */
438 for(i=0;i<ch;i++){
439 partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(*partword[i]));
440 memset(partword[i],0,n/samples_per_partition*sizeof(*partword[i]));
441 }
443 for(i=0;i<partvals;i++){
444 int offset=i*samples_per_partition+info->begin;
445 for(j=0;j<ch;j++){
446 int max=0;
447 int ent=0;
448 for(k=0;k<samples_per_partition;k++){
449 if(abs(in[j][offset+k])>max)max=abs(in[j][offset+k]);
450 ent+=abs(in[j][offset+k]);
451 }
452 ent*=scale;
454 for(k=0;k<possible_partitions-1;k++)
455 if(max<=info->classmetric1[k] &&
456 (info->classmetric2[k]<0 || ent<info->classmetric2[k]))
457 break;
459 partword[j][i]=k;
460 }
461 }
463 #ifdef TRAIN_RESAUX
464 {
465 FILE *of;
466 char buffer[80];
468 for(i=0;i<ch;i++){
469 sprintf(buffer,"resaux_%d.vqd",look->train_seq);
470 of=fopen(buffer,"a");
471 for(j=0;j<partvals;j++)
472 fprintf(of,"%ld, ",partword[i][j]);
473 fprintf(of,"\n");
474 fclose(of);
475 }
476 }
477 #endif
478 look->frames++;
480 return(partword);
481 }
483 /* designed for stereo or other modes where the partition size is an
484 integer multiple of the number of channels encoded in the current
485 submap */
486 static long **_2class(vorbis_block *vb,vorbis_look_residue *vl,int **in,
487 int ch){
488 long i,j,k,l;
489 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
490 vorbis_info_residue0 *info=look->info;
492 /* move all this setup out later */
493 int samples_per_partition=info->grouping;
494 int possible_partitions=info->partitions;
495 int n=info->end-info->begin;
497 int partvals=n/samples_per_partition;
498 long **partword=_vorbis_block_alloc(vb,sizeof(*partword));
500 #if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
501 FILE *of;
502 char buffer[80];
503 #endif
505 partword[0]=_vorbis_block_alloc(vb,partvals*sizeof(*partword[0]));
506 memset(partword[0],0,partvals*sizeof(*partword[0]));
508 for(i=0,l=info->begin/ch;i<partvals;i++){
509 int magmax=0;
510 int angmax=0;
511 for(j=0;j<samples_per_partition;j+=ch){
512 if(abs(in[0][l])>magmax)magmax=abs(in[0][l]);
513 for(k=1;k<ch;k++)
514 if(abs(in[k][l])>angmax)angmax=abs(in[k][l]);
515 l++;
516 }
518 for(j=0;j<possible_partitions-1;j++)
519 if(magmax<=info->classmetric1[j] &&
520 angmax<=info->classmetric2[j])
521 break;
523 partword[0][i]=j;
525 }
527 #ifdef TRAIN_RESAUX
528 sprintf(buffer,"resaux_%d.vqd",look->train_seq);
529 of=fopen(buffer,"a");
530 for(i=0;i<partvals;i++)
531 fprintf(of,"%ld, ",partword[0][i]);
532 fprintf(of,"\n");
533 fclose(of);
534 #endif
536 look->frames++;
538 return(partword);
539 }
541 static int _01forward(oggpack_buffer *opb,
542 vorbis_look_residue *vl,
543 int **in,int ch,
544 long **partword,
545 #ifdef TRAIN_RES
546 int (*encode)(oggpack_buffer *,int *,int,
547 codebook *,long *),
548 int submap
549 #else
550 int (*encode)(oggpack_buffer *,int *,int,
551 codebook *)
552 #endif
553 ){
554 long i,j,k,s;
555 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
556 vorbis_info_residue0 *info=look->info;
558 #ifdef TRAIN_RES
559 look->submap=submap;
560 #endif
562 /* move all this setup out later */
563 int samples_per_partition=info->grouping;
564 int possible_partitions=info->partitions;
565 int partitions_per_word=look->phrasebook->dim;
566 int n=info->end-info->begin;
568 int partvals=n/samples_per_partition;
569 long resbits[128];
570 long resvals[128];
572 #ifdef TRAIN_RES
573 for(i=0;i<ch;i++)
574 for(j=info->begin;j<info->end;j++){
575 if(in[i][j]>look->tmax)look->tmax=in[i][j];
576 if(in[i][j]<look->tmin)look->tmin=in[i][j];
577 }
578 #endif
580 memset(resbits,0,sizeof(resbits));
581 memset(resvals,0,sizeof(resvals));
583 /* we code the partition words for each channel, then the residual
584 words for a partition per channel until we've written all the
585 residual words for that partition word. Then write the next
586 partition channel words... */
588 for(s=0;s<look->stages;s++){
590 for(i=0;i<partvals;){
592 /* first we encode a partition codeword for each channel */
593 if(s==0){
594 for(j=0;j<ch;j++){
595 long val=partword[j][i];
596 for(k=1;k<partitions_per_word;k++){
597 val*=possible_partitions;
598 if(i+k<partvals)
599 val+=partword[j][i+k];
600 }
602 /* training hack */
603 if(val<look->phrasebook->entries)
604 look->phrasebits+=vorbis_book_encode(look->phrasebook,val,opb);
605 #if 0 /*def TRAIN_RES*/
606 else
607 fprintf(stderr,"!");
608 #endif
610 }
611 }
613 /* now we encode interleaved residual values for the partitions */
614 for(k=0;k<partitions_per_word && i<partvals;k++,i++){
615 long offset=i*samples_per_partition+info->begin;
617 for(j=0;j<ch;j++){
618 if(s==0)resvals[partword[j][i]]+=samples_per_partition;
619 if(info->secondstages[partword[j][i]]&(1<<s)){
620 codebook *statebook=look->partbooks[partword[j][i]][s];
621 if(statebook){
622 int ret;
623 #ifdef TRAIN_RES
624 long *accumulator=NULL;
625 accumulator=look->training_data[s][partword[j][i]];
626 {
627 int l;
628 int *samples=in[j]+offset;
629 for(l=0;l<samples_per_partition;l++){
630 if(samples[l]<look->training_min[s][partword[j][i]])
631 look->training_min[s][partword[j][i]]=samples[l];
632 if(samples[l]>look->training_max[s][partword[j][i]])
633 look->training_max[s][partword[j][i]]=samples[l];
634 }
635 }
636 ret=encode(opb,in[j]+offset,samples_per_partition,
637 statebook,accumulator);
638 #else
639 ret=encode(opb,in[j]+offset,samples_per_partition,
640 statebook);
641 #endif
643 look->postbits+=ret;
644 resbits[partword[j][i]]+=ret;
645 }
646 }
647 }
648 }
649 }
650 }
652 return(0);
653 }
655 /* a truncated packet here just means 'stop working'; it's not an error */
656 static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl,
657 float **in,int ch,
658 long (*decodepart)(codebook *, float *,
659 oggpack_buffer *,int)){
661 long i,j,k,l,s;
662 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
663 vorbis_info_residue0 *info=look->info;
665 /* move all this setup out later */
666 int samples_per_partition=info->grouping;
667 int partitions_per_word=look->phrasebook->dim;
668 int max=vb->pcmend>>1;
669 int end=(info->end<max?info->end:max);
670 int n=end-info->begin;
672 if(n>0){
673 int partvals=n/samples_per_partition;
674 int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
675 int ***partword=alloca(ch*sizeof(*partword));
677 for(j=0;j<ch;j++)
678 partword[j]=_vorbis_block_alloc(vb,partwords*sizeof(*partword[j]));
680 for(s=0;s<look->stages;s++){
682 /* each loop decodes on partition codeword containing
683 partitions_per_word partitions */
684 for(i=0,l=0;i<partvals;l++){
685 if(s==0){
686 /* fetch the partition word for each channel */
687 for(j=0;j<ch;j++){
688 int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
690 if(temp==-1 || temp>=info->partvals)goto eopbreak;
691 partword[j][l]=look->decodemap[temp];
692 if(partword[j][l]==NULL)goto errout;
693 }
694 }
696 /* now we decode residual values for the partitions */
697 for(k=0;k<partitions_per_word && i<partvals;k++,i++)
698 for(j=0;j<ch;j++){
699 long offset=info->begin+i*samples_per_partition;
700 if(info->secondstages[partword[j][l][k]]&(1<<s)){
701 codebook *stagebook=look->partbooks[partword[j][l][k]][s];
702 if(stagebook){
703 if(decodepart(stagebook,in[j]+offset,&vb->opb,
704 samples_per_partition)==-1)goto eopbreak;
705 }
706 }
707 }
708 }
709 }
710 }
711 errout:
712 eopbreak:
713 return(0);
714 }
716 int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,
717 float **in,int *nonzero,int ch){
718 int i,used=0;
719 for(i=0;i<ch;i++)
720 if(nonzero[i])
721 in[used++]=in[i];
722 if(used)
723 return(_01inverse(vb,vl,in,used,vorbis_book_decodevs_add));
724 else
725 return(0);
726 }
728 int res1_forward(oggpack_buffer *opb,vorbis_block *vb,vorbis_look_residue *vl,
729 int **in,int *nonzero,int ch, long **partword, int submap){
730 int i,used=0;
731 (void)vb;
732 for(i=0;i<ch;i++)
733 if(nonzero[i])
734 in[used++]=in[i];
736 if(used){
737 #ifdef TRAIN_RES
738 return _01forward(opb,vl,in,used,partword,_encodepart,submap);
739 #else
740 (void)submap;
741 return _01forward(opb,vl,in,used,partword,_encodepart);
742 #endif
743 }else{
744 return(0);
745 }
746 }
748 long **res1_class(vorbis_block *vb,vorbis_look_residue *vl,
749 int **in,int *nonzero,int ch){
750 int i,used=0;
751 for(i=0;i<ch;i++)
752 if(nonzero[i])
753 in[used++]=in[i];
754 if(used)
755 return(_01class(vb,vl,in,used));
756 else
757 return(0);
758 }
760 int res1_inverse(vorbis_block *vb,vorbis_look_residue *vl,
761 float **in,int *nonzero,int ch){
762 int i,used=0;
763 for(i=0;i<ch;i++)
764 if(nonzero[i])
765 in[used++]=in[i];
766 if(used)
767 return(_01inverse(vb,vl,in,used,vorbis_book_decodev_add));
768 else
769 return(0);
770 }
772 long **res2_class(vorbis_block *vb,vorbis_look_residue *vl,
773 int **in,int *nonzero,int ch){
774 int i,used=0;
775 for(i=0;i<ch;i++)
776 if(nonzero[i])used++;
777 if(used)
778 return(_2class(vb,vl,in,ch));
779 else
780 return(0);
781 }
783 /* res2 is slightly more different; all the channels are interleaved
784 into a single vector and encoded. */
786 int res2_forward(oggpack_buffer *opb,
787 vorbis_block *vb,vorbis_look_residue *vl,
788 int **in,int *nonzero,int ch, long **partword,int submap){
789 long i,j,k,n=vb->pcmend/2,used=0;
791 /* don't duplicate the code; use a working vector hack for now and
792 reshape ourselves into a single channel res1 */
793 /* ugly; reallocs for each coupling pass :-( */
794 int *work=_vorbis_block_alloc(vb,ch*n*sizeof(*work));
795 for(i=0;i<ch;i++){
796 int *pcm=in[i];
797 if(nonzero[i])used++;
798 for(j=0,k=i;j<n;j++,k+=ch)
799 work[k]=pcm[j];
800 }
802 if(used){
803 #ifdef TRAIN_RES
804 return _01forward(opb,vl,&work,1,partword,_encodepart,submap);
805 #else
806 (void)submap;
807 return _01forward(opb,vl,&work,1,partword,_encodepart);
808 #endif
809 }else{
810 return(0);
811 }
812 }
814 /* duplicate code here as speed is somewhat more important */
815 int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl,
816 float **in,int *nonzero,int ch){
817 long i,k,l,s;
818 vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
819 vorbis_info_residue0 *info=look->info;
821 /* move all this setup out later */
822 int samples_per_partition=info->grouping;
823 int partitions_per_word=look->phrasebook->dim;
824 int max=(vb->pcmend*ch)>>1;
825 int end=(info->end<max?info->end:max);
826 int n=end-info->begin;
828 if(n>0){
829 int partvals=n/samples_per_partition;
830 int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
831 int **partword=_vorbis_block_alloc(vb,partwords*sizeof(*partword));
833 for(i=0;i<ch;i++)if(nonzero[i])break;
834 if(i==ch)return(0); /* no nonzero vectors */
836 for(s=0;s<look->stages;s++){
837 for(i=0,l=0;i<partvals;l++){
839 if(s==0){
840 /* fetch the partition word */
841 int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
842 if(temp==-1 || temp>=info->partvals)goto eopbreak;
843 partword[l]=look->decodemap[temp];
844 if(partword[l]==NULL)goto errout;
845 }
847 /* now we decode residual values for the partitions */
848 for(k=0;k<partitions_per_word && i<partvals;k++,i++)
849 if(info->secondstages[partword[l][k]]&(1<<s)){
850 codebook *stagebook=look->partbooks[partword[l][k]][s];
852 if(stagebook){
853 if(vorbis_book_decodevv_add(stagebook,in,
854 i*samples_per_partition+info->begin,ch,
855 &vb->opb,samples_per_partition)==-1)
856 goto eopbreak;
857 }
858 }
859 }
860 }
861 }
862 errout:
863 eopbreak:
864 return(0);
865 }
868 const vorbis_func_residue residue0_exportbundle={
869 NULL,
870 &res0_unpack,
871 &res0_look,
872 &res0_free_info,
873 &res0_free_look,
874 NULL,
875 NULL,
876 &res0_inverse
877 };
879 const vorbis_func_residue residue1_exportbundle={
880 &res0_pack,
881 &res0_unpack,
882 &res0_look,
883 &res0_free_info,
884 &res0_free_look,
885 &res1_class,
886 &res1_forward,
887 &res1_inverse
888 };
890 const vorbis_func_residue residue2_exportbundle={
891 &res0_pack,
892 &res0_unpack,
893 &res0_look,
894 &res0_free_info,
895 &res0_free_look,
896 &res2_class,
897 &res2_forward,
898 &res2_inverse
899 };
