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-rw-r--r--vorbis/lib/res0.c889
1 files changed, 0 insertions, 889 deletions
diff --git a/vorbis/lib/res0.c b/vorbis/lib/res0.c
deleted file mode 100644
index 6d623d7..0000000
--- a/vorbis/lib/res0.c
+++ /dev/null
@@ -1,889 +0,0 @@
-/********************************************************************
- * *
- * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
- * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
- * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
- * *
- * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2010 *
- * by the Xiph.Org Foundation http://www.xiph.org/ *
- * *
- ********************************************************************
-
- function: residue backend 0, 1 and 2 implementation
-
- ********************************************************************/
-
-/* Slow, slow, slow, simpleminded and did I mention it was slow? The
- encode/decode loops are coded for clarity and performance is not
- yet even a nagging little idea lurking in the shadows. Oh and BTW,
- it's slow. */
-
-#include <stdlib.h>
-#include <string.h>
-#include <math.h>
-#include <ogg/ogg.h>
-#include "vorbis/codec.h"
-#include "codec_internal.h"
-#include "registry.h"
-#include "codebook.h"
-#include "misc.h"
-#include "os.h"
-
-//#define TRAIN_RES 1
-//#define TRAIN_RESAUX 1
-
-#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
-#include <stdio.h>
-#endif
-
-typedef struct {
- vorbis_info_residue0 *info;
-
- int parts;
- int stages;
- codebook *fullbooks;
- codebook *phrasebook;
- codebook ***partbooks;
-
- int partvals;
- int **decodemap;
-
- long postbits;
- long phrasebits;
- long frames;
-
-#if defined(TRAIN_RES) || defined(TRAIN_RESAUX)
- int train_seq;
- long *training_data[8][64];
- float training_max[8][64];
- float training_min[8][64];
- float tmin;
- float tmax;
- int submap;
-#endif
-
-} vorbis_look_residue0;
-
-void res0_free_info(vorbis_info_residue *i){
- vorbis_info_residue0 *info=(vorbis_info_residue0 *)i;
- if(info){
- memset(info,0,sizeof(*info));
- _ogg_free(info);
- }
-}
-
-void res0_free_look(vorbis_look_residue *i){
- int j;
- if(i){
-
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
-
-#ifdef TRAIN_RES
- {
- int j,k,l;
- for(j=0;j<look->parts;j++){
- /*fprintf(stderr,"partition %d: ",j);*/
- for(k=0;k<8;k++)
- if(look->training_data[k][j]){
- char buffer[80];
- FILE *of;
- codebook *statebook=look->partbooks[j][k];
-
- /* long and short into the same bucket by current convention */
- sprintf(buffer,"res_sub%d_part%d_pass%d.vqd",look->submap,j,k);
- of=fopen(buffer,"a");
-
- for(l=0;l<statebook->entries;l++)
- fprintf(of,"%d:%ld\n",l,look->training_data[k][j][l]);
-
- fclose(of);
-
- /*fprintf(stderr,"%d(%.2f|%.2f) ",k,
- look->training_min[k][j],look->training_max[k][j]);*/
-
- _ogg_free(look->training_data[k][j]);
- look->training_data[k][j]=NULL;
- }
- /*fprintf(stderr,"\n");*/
- }
- }
- fprintf(stderr,"min/max residue: %g::%g\n",look->tmin,look->tmax);
-
- /*fprintf(stderr,"residue bit usage %f:%f (%f total)\n",
- (float)look->phrasebits/look->frames,
- (float)look->postbits/look->frames,
- (float)(look->postbits+look->phrasebits)/look->frames);*/
-#endif
-
-
- /*vorbis_info_residue0 *info=look->info;
-
- fprintf(stderr,
- "%ld frames encoded in %ld phrasebits and %ld residue bits "
- "(%g/frame) \n",look->frames,look->phrasebits,
- look->resbitsflat,
- (look->phrasebits+look->resbitsflat)/(float)look->frames);
-
- for(j=0;j<look->parts;j++){
- long acc=0;
- fprintf(stderr,"\t[%d] == ",j);
- for(k=0;k<look->stages;k++)
- if((info->secondstages[j]>>k)&1){
- fprintf(stderr,"%ld,",look->resbits[j][k]);
- acc+=look->resbits[j][k];
- }
-
- fprintf(stderr,":: (%ld vals) %1.2fbits/sample\n",look->resvals[j],
- acc?(float)acc/(look->resvals[j]*info->grouping):0);
- }
- fprintf(stderr,"\n");*/
-
- for(j=0;j<look->parts;j++)
- if(look->partbooks[j])_ogg_free(look->partbooks[j]);
- _ogg_free(look->partbooks);
- for(j=0;j<look->partvals;j++)
- _ogg_free(look->decodemap[j]);
- _ogg_free(look->decodemap);
-
- memset(look,0,sizeof(*look));
- _ogg_free(look);
- }
-}
-
-static int icount(unsigned int v){
- int ret=0;
- while(v){
- ret+=v&1;
- v>>=1;
- }
- return(ret);
-}
-
-
-void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
- vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
- int j,acc=0;
- oggpack_write(opb,info->begin,24);
- oggpack_write(opb,info->end,24);
-
- oggpack_write(opb,info->grouping-1,24); /* residue vectors to group and
- code with a partitioned book */
- oggpack_write(opb,info->partitions-1,6); /* possible partition choices */
- oggpack_write(opb,info->groupbook,8); /* group huffman book */
-
- /* secondstages is a bitmask; as encoding progresses pass by pass, a
- bitmask of one indicates this partition class has bits to write
- this pass */
- for(j=0;j<info->partitions;j++){
- if(ov_ilog(info->secondstages[j])>3){
- /* yes, this is a minor hack due to not thinking ahead */
- oggpack_write(opb,info->secondstages[j],3);
- oggpack_write(opb,1,1);
- oggpack_write(opb,info->secondstages[j]>>3,5);
- }else
- oggpack_write(opb,info->secondstages[j],4); /* trailing zero */
- acc+=icount(info->secondstages[j]);
- }
- for(j=0;j<acc;j++)
- oggpack_write(opb,info->booklist[j],8);
-
-}
-
-/* vorbis_info is for range checking */
-vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
- int j,acc=0;
- vorbis_info_residue0 *info=_ogg_calloc(1,sizeof(*info));
- codec_setup_info *ci=vi->codec_setup;
-
- info->begin=oggpack_read(opb,24);
- info->end=oggpack_read(opb,24);
- info->grouping=oggpack_read(opb,24)+1;
- info->partitions=oggpack_read(opb,6)+1;
- info->groupbook=oggpack_read(opb,8);
-
- /* check for premature EOP */
- if(info->groupbook<0)goto errout;
-
- for(j=0;j<info->partitions;j++){
- int cascade=oggpack_read(opb,3);
- int cflag=oggpack_read(opb,1);
- if(cflag<0) goto errout;
- if(cflag){
- int c=oggpack_read(opb,5);
- if(c<0) goto errout;
- cascade|=(c<<3);
- }
- info->secondstages[j]=cascade;
-
- acc+=icount(cascade);
- }
- for(j=0;j<acc;j++){
- int book=oggpack_read(opb,8);
- if(book<0) goto errout;
- info->booklist[j]=book;
- }
-
- if(info->groupbook>=ci->books)goto errout;
- for(j=0;j<acc;j++){
- if(info->booklist[j]>=ci->books)goto errout;
- if(ci->book_param[info->booklist[j]]->maptype==0)goto errout;
- }
-
- /* verify the phrasebook is not specifying an impossible or
- inconsistent partitioning scheme. */
- /* modify the phrasebook ranging check from r16327; an early beta
- encoder had a bug where it used an oversized phrasebook by
- accident. These files should continue to be playable, but don't
- allow an exploit */
- {
- int entries = ci->book_param[info->groupbook]->entries;
- int dim = ci->book_param[info->groupbook]->dim;
- int partvals = 1;
- if (dim<1) goto errout;
- while(dim>0){
- partvals *= info->partitions;
- if(partvals > entries) goto errout;
- dim--;
- }
- info->partvals = partvals;
- }
-
- return(info);
- errout:
- res0_free_info(info);
- return(NULL);
-}
-
-vorbis_look_residue *res0_look(vorbis_dsp_state *vd,
- vorbis_info_residue *vr){
- vorbis_info_residue0 *info=(vorbis_info_residue0 *)vr;
- vorbis_look_residue0 *look=_ogg_calloc(1,sizeof(*look));
- codec_setup_info *ci=vd->vi->codec_setup;
-
- int j,k,acc=0;
- int dim;
- int maxstage=0;
- look->info=info;
-
- look->parts=info->partitions;
- look->fullbooks=ci->fullbooks;
- look->phrasebook=ci->fullbooks+info->groupbook;
- dim=look->phrasebook->dim;
-
- look->partbooks=_ogg_calloc(look->parts,sizeof(*look->partbooks));
-
- for(j=0;j<look->parts;j++){
- int stages=ov_ilog(info->secondstages[j]);
- if(stages){
- if(stages>maxstage)maxstage=stages;
- look->partbooks[j]=_ogg_calloc(stages,sizeof(*look->partbooks[j]));
- for(k=0;k<stages;k++)
- if(info->secondstages[j]&(1<<k)){
- look->partbooks[j][k]=ci->fullbooks+info->booklist[acc++];
-#ifdef TRAIN_RES
- look->training_data[k][j]=_ogg_calloc(look->partbooks[j][k]->entries,
- sizeof(***look->training_data));
-#endif
- }
- }
- }
-
- look->partvals=1;
- for(j=0;j<dim;j++)
- look->partvals*=look->parts;
-
- look->stages=maxstage;
- look->decodemap=_ogg_malloc(look->partvals*sizeof(*look->decodemap));
- for(j=0;j<look->partvals;j++){
- long val=j;
- long mult=look->partvals/look->parts;
- look->decodemap[j]=_ogg_malloc(dim*sizeof(*look->decodemap[j]));
- for(k=0;k<dim;k++){
- long deco=val/mult;
- val-=deco*mult;
- mult/=look->parts;
- look->decodemap[j][k]=deco;
- }
- }
-#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
- {
- static int train_seq=0;
- look->train_seq=train_seq++;
- }
-#endif
- return(look);
-}
-
-/* break an abstraction and copy some code for performance purposes */
-static int local_book_besterror(codebook *book,int *a){
- int dim=book->dim;
- int i,j,o;
- int minval=book->minval;
- int del=book->delta;
- int qv=book->quantvals;
- int ze=(qv>>1);
- int index=0;
- /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
- int p[8]={0,0,0,0,0,0,0,0};
-
- if(del!=1){
- for(i=0,o=dim;i<dim;i++){
- int v = (a[--o]-minval+(del>>1))/del;
- int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
- index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
- p[o]=v*del+minval;
- }
- }else{
- for(i=0,o=dim;i<dim;i++){
- int v = a[--o]-minval;
- int m = (v<ze ? ((ze-v)<<1)-1 : ((v-ze)<<1));
- index = index*qv+ (m<0?0:(m>=qv?qv-1:m));
- p[o]=v*del+minval;
- }
- }
-
- if(book->c->lengthlist[index]<=0){
- const static_codebook *c=book->c;
- int best=-1;
- /* assumes integer/centered encoder codebook maptype 1 no more than dim 8 */
- int e[8]={0,0,0,0,0,0,0,0};
- int maxval = book->minval + book->delta*(book->quantvals-1);
- for(i=0;i<book->entries;i++){
- if(c->lengthlist[i]>0){
- int this=0;
- for(j=0;j<dim;j++){
- int val=(e[j]-a[j]);
- this+=val*val;
- }
- if(best==-1 || this<best){
- memcpy(p,e,sizeof(p));
- best=this;
- index=i;
- }
- }
- /* assumes the value patterning created by the tools in vq/ */
- j=0;
- while(e[j]>=maxval)
- e[j++]=0;
- if(e[j]>=0)
- e[j]+=book->delta;
- e[j]= -e[j];
- }
- }
-
- if(index>-1){
- for(i=0;i<dim;i++)
- *a++ -= p[i];
- }
-
- return(index);
-}
-
-#ifdef TRAIN_RES
-static int _encodepart(oggpack_buffer *opb,int *vec, int n,
- codebook *book,long *acc){
-#else
-static int _encodepart(oggpack_buffer *opb,int *vec, int n,
- codebook *book){
-#endif
- int i,bits=0;
- int dim=book->dim;
- int step=n/dim;
-
- for(i=0;i<step;i++){
- int entry=local_book_besterror(book,vec+i*dim);
-
-#ifdef TRAIN_RES
- if(entry>=0)
- acc[entry]++;
-#endif
-
- bits+=vorbis_book_encode(book,entry,opb);
-
- }
-
- return(bits);
-}
-
-static long **_01class(vorbis_block *vb,vorbis_look_residue *vl,
- int **in,int ch){
- long i,j,k;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
- vorbis_info_residue0 *info=look->info;
-
- /* move all this setup out later */
- int samples_per_partition=info->grouping;
- int possible_partitions=info->partitions;
- int n=info->end-info->begin;
-
- int partvals=n/samples_per_partition;
- long **partword=_vorbis_block_alloc(vb,ch*sizeof(*partword));
- float scale=100./samples_per_partition;
-
- /* we find the partition type for each partition of each
- channel. We'll go back and do the interleaved encoding in a
- bit. For now, clarity */
-
- for(i=0;i<ch;i++){
- partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(*partword[i]));
- memset(partword[i],0,n/samples_per_partition*sizeof(*partword[i]));
- }
-
- for(i=0;i<partvals;i++){
- int offset=i*samples_per_partition+info->begin;
- for(j=0;j<ch;j++){
- int max=0;
- int ent=0;
- for(k=0;k<samples_per_partition;k++){
- if(abs(in[j][offset+k])>max)max=abs(in[j][offset+k]);
- ent+=abs(in[j][offset+k]);
- }
- ent*=scale;
-
- for(k=0;k<possible_partitions-1;k++)
- if(max<=info->classmetric1[k] &&
- (info->classmetric2[k]<0 || ent<info->classmetric2[k]))
- break;
-
- partword[j][i]=k;
- }
- }
-
-#ifdef TRAIN_RESAUX
- {
- FILE *of;
- char buffer[80];
-
- for(i=0;i<ch;i++){
- sprintf(buffer,"resaux_%d.vqd",look->train_seq);
- of=fopen(buffer,"a");
- for(j=0;j<partvals;j++)
- fprintf(of,"%ld, ",partword[i][j]);
- fprintf(of,"\n");
- fclose(of);
- }
- }
-#endif
- look->frames++;
-
- return(partword);
-}
-
-/* designed for stereo or other modes where the partition size is an
- integer multiple of the number of channels encoded in the current
- submap */
-static long **_2class(vorbis_block *vb,vorbis_look_residue *vl,int **in,
- int ch){
- long i,j,k,l;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
- vorbis_info_residue0 *info=look->info;
-
- /* move all this setup out later */
- int samples_per_partition=info->grouping;
- int possible_partitions=info->partitions;
- int n=info->end-info->begin;
-
- int partvals=n/samples_per_partition;
- long **partword=_vorbis_block_alloc(vb,sizeof(*partword));
-
-#if defined(TRAIN_RES) || defined (TRAIN_RESAUX)
- FILE *of;
- char buffer[80];
-#endif
-
- partword[0]=_vorbis_block_alloc(vb,partvals*sizeof(*partword[0]));
- memset(partword[0],0,partvals*sizeof(*partword[0]));
-
- for(i=0,l=info->begin/ch;i<partvals;i++){
- int magmax=0;
- int angmax=0;
- for(j=0;j<samples_per_partition;j+=ch){
- if(abs(in[0][l])>magmax)magmax=abs(in[0][l]);
- for(k=1;k<ch;k++)
- if(abs(in[k][l])>angmax)angmax=abs(in[k][l]);
- l++;
- }
-
- for(j=0;j<possible_partitions-1;j++)
- if(magmax<=info->classmetric1[j] &&
- angmax<=info->classmetric2[j])
- break;
-
- partword[0][i]=j;
-
- }
-
-#ifdef TRAIN_RESAUX
- sprintf(buffer,"resaux_%d.vqd",look->train_seq);
- of=fopen(buffer,"a");
- for(i=0;i<partvals;i++)
- fprintf(of,"%ld, ",partword[0][i]);
- fprintf(of,"\n");
- fclose(of);
-#endif
-
- look->frames++;
-
- return(partword);
-}
-
-static int _01forward(oggpack_buffer *opb,
- vorbis_look_residue *vl,
- int **in,int ch,
- long **partword,
-#ifdef TRAIN_RES
- int (*encode)(oggpack_buffer *,int *,int,
- codebook *,long *),
- int submap
-#else
- int (*encode)(oggpack_buffer *,int *,int,
- codebook *)
-#endif
-){
- long i,j,k,s;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
- vorbis_info_residue0 *info=look->info;
-
-#ifdef TRAIN_RES
- look->submap=submap;
-#endif
-
- /* move all this setup out later */
- int samples_per_partition=info->grouping;
- int possible_partitions=info->partitions;
- int partitions_per_word=look->phrasebook->dim;
- int n=info->end-info->begin;
-
- int partvals=n/samples_per_partition;
- long resbits[128];
- long resvals[128];
-
-#ifdef TRAIN_RES
- for(i=0;i<ch;i++)
- for(j=info->begin;j<info->end;j++){
- if(in[i][j]>look->tmax)look->tmax=in[i][j];
- if(in[i][j]<look->tmin)look->tmin=in[i][j];
- }
-#endif
-
- memset(resbits,0,sizeof(resbits));
- memset(resvals,0,sizeof(resvals));
-
- /* we code the partition words for each channel, then the residual
- words for a partition per channel until we've written all the
- residual words for that partition word. Then write the next
- partition channel words... */
-
- for(s=0;s<look->stages;s++){
-
- for(i=0;i<partvals;){
-
- /* first we encode a partition codeword for each channel */
- if(s==0){
- for(j=0;j<ch;j++){
- long val=partword[j][i];
- for(k=1;k<partitions_per_word;k++){
- val*=possible_partitions;
- if(i+k<partvals)
- val+=partword[j][i+k];
- }
-
- /* training hack */
- if(val<look->phrasebook->entries)
- look->phrasebits+=vorbis_book_encode(look->phrasebook,val,opb);
-#if 0 /*def TRAIN_RES*/
- else
- fprintf(stderr,"!");
-#endif
-
- }
- }
-
- /* now we encode interleaved residual values for the partitions */
- for(k=0;k<partitions_per_word && i<partvals;k++,i++){
- long offset=i*samples_per_partition+info->begin;
-
- for(j=0;j<ch;j++){
- if(s==0)resvals[partword[j][i]]+=samples_per_partition;
- if(info->secondstages[partword[j][i]]&(1<<s)){
- codebook *statebook=look->partbooks[partword[j][i]][s];
- if(statebook){
- int ret;
-#ifdef TRAIN_RES
- long *accumulator=NULL;
- accumulator=look->training_data[s][partword[j][i]];
- {
- int l;
- int *samples=in[j]+offset;
- for(l=0;l<samples_per_partition;l++){
- if(samples[l]<look->training_min[s][partword[j][i]])
- look->training_min[s][partword[j][i]]=samples[l];
- if(samples[l]>look->training_max[s][partword[j][i]])
- look->training_max[s][partword[j][i]]=samples[l];
- }
- }
- ret=encode(opb,in[j]+offset,samples_per_partition,
- statebook,accumulator);
-#else
- ret=encode(opb,in[j]+offset,samples_per_partition,
- statebook);
-#endif
-
- look->postbits+=ret;
- resbits[partword[j][i]]+=ret;
- }
- }
- }
- }
- }
- }
-
- return(0);
-}
-
-/* a truncated packet here just means 'stop working'; it's not an error */
-static int _01inverse(vorbis_block *vb,vorbis_look_residue *vl,
- float **in,int ch,
- long (*decodepart)(codebook *, float *,
- oggpack_buffer *,int)){
-
- long i,j,k,l,s;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
- vorbis_info_residue0 *info=look->info;
-
- /* move all this setup out later */
- int samples_per_partition=info->grouping;
- int partitions_per_word=look->phrasebook->dim;
- int max=vb->pcmend>>1;
- int end=(info->end<max?info->end:max);
- int n=end-info->begin;
-
- if(n>0){
- int partvals=n/samples_per_partition;
- int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
- int ***partword=alloca(ch*sizeof(*partword));
-
- for(j=0;j<ch;j++)
- partword[j]=_vorbis_block_alloc(vb,partwords*sizeof(*partword[j]));
-
- for(s=0;s<look->stages;s++){
-
- /* each loop decodes on partition codeword containing
- partitions_per_word partitions */
- for(i=0,l=0;i<partvals;l++){
- if(s==0){
- /* fetch the partition word for each channel */
- for(j=0;j<ch;j++){
- int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
-
- if(temp==-1 || temp>=info->partvals)goto eopbreak;
- partword[j][l]=look->decodemap[temp];
- if(partword[j][l]==NULL)goto errout;
- }
- }
-
- /* now we decode residual values for the partitions */
- for(k=0;k<partitions_per_word && i<partvals;k++,i++)
- for(j=0;j<ch;j++){
- long offset=info->begin+i*samples_per_partition;
- if(info->secondstages[partword[j][l][k]]&(1<<s)){
- codebook *stagebook=look->partbooks[partword[j][l][k]][s];
- if(stagebook){
- if(decodepart(stagebook,in[j]+offset,&vb->opb,
- samples_per_partition)==-1)goto eopbreak;
- }
- }
- }
- }
- }
- }
- errout:
- eopbreak:
- return(0);
-}
-
-int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,
- float **in,int *nonzero,int ch){
- int i,used=0;
- for(i=0;i<ch;i++)
- if(nonzero[i])
- in[used++]=in[i];
- if(used)
- return(_01inverse(vb,vl,in,used,vorbis_book_decodevs_add));
- else
- return(0);
-}
-
-int res1_forward(oggpack_buffer *opb,vorbis_block *vb,vorbis_look_residue *vl,
- int **in,int *nonzero,int ch, long **partword, int submap){
- int i,used=0;
- (void)vb;
- for(i=0;i<ch;i++)
- if(nonzero[i])
- in[used++]=in[i];
-
- if(used){
-#ifdef TRAIN_RES
- return _01forward(opb,vl,in,used,partword,_encodepart,submap);
-#else
- (void)submap;
- return _01forward(opb,vl,in,used,partword,_encodepart);
-#endif
- }else{
- return(0);
- }
-}
-
-long **res1_class(vorbis_block *vb,vorbis_look_residue *vl,
- int **in,int *nonzero,int ch){
- int i,used=0;
- for(i=0;i<ch;i++)
- if(nonzero[i])
- in[used++]=in[i];
- if(used)
- return(_01class(vb,vl,in,used));
- else
- return(0);
-}
-
-int res1_inverse(vorbis_block *vb,vorbis_look_residue *vl,
- float **in,int *nonzero,int ch){
- int i,used=0;
- for(i=0;i<ch;i++)
- if(nonzero[i])
- in[used++]=in[i];
- if(used)
- return(_01inverse(vb,vl,in,used,vorbis_book_decodev_add));
- else
- return(0);
-}
-
-long **res2_class(vorbis_block *vb,vorbis_look_residue *vl,
- int **in,int *nonzero,int ch){
- int i,used=0;
- for(i=0;i<ch;i++)
- if(nonzero[i])used++;
- if(used)
- return(_2class(vb,vl,in,ch));
- else
- return(0);
-}
-
-/* res2 is slightly more different; all the channels are interleaved
- into a single vector and encoded. */
-
-int res2_forward(oggpack_buffer *opb,
- vorbis_block *vb,vorbis_look_residue *vl,
- int **in,int *nonzero,int ch, long **partword,int submap){
- long i,j,k,n=vb->pcmend/2,used=0;
-
- /* don't duplicate the code; use a working vector hack for now and
- reshape ourselves into a single channel res1 */
- /* ugly; reallocs for each coupling pass :-( */
- int *work=_vorbis_block_alloc(vb,ch*n*sizeof(*work));
- for(i=0;i<ch;i++){
- int *pcm=in[i];
- if(nonzero[i])used++;
- for(j=0,k=i;j<n;j++,k+=ch)
- work[k]=pcm[j];
- }
-
- if(used){
-#ifdef TRAIN_RES
- return _01forward(opb,vl,&work,1,partword,_encodepart,submap);
-#else
- (void)submap;
- return _01forward(opb,vl,&work,1,partword,_encodepart);
-#endif
- }else{
- return(0);
- }
-}
-
-/* duplicate code here as speed is somewhat more important */
-int res2_inverse(vorbis_block *vb,vorbis_look_residue *vl,
- float **in,int *nonzero,int ch){
- long i,k,l,s;
- vorbis_look_residue0 *look=(vorbis_look_residue0 *)vl;
- vorbis_info_residue0 *info=look->info;
-
- /* move all this setup out later */
- int samples_per_partition=info->grouping;
- int partitions_per_word=look->phrasebook->dim;
- int max=(vb->pcmend*ch)>>1;
- int end=(info->end<max?info->end:max);
- int n=end-info->begin;
-
- if(n>0){
- int partvals=n/samples_per_partition;
- int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
- int **partword=_vorbis_block_alloc(vb,partwords*sizeof(*partword));
-
- for(i=0;i<ch;i++)if(nonzero[i])break;
- if(i==ch)return(0); /* no nonzero vectors */
-
- for(s=0;s<look->stages;s++){
- for(i=0,l=0;i<partvals;l++){
-
- if(s==0){
- /* fetch the partition word */
- int temp=vorbis_book_decode(look->phrasebook,&vb->opb);
- if(temp==-1 || temp>=info->partvals)goto eopbreak;
- partword[l]=look->decodemap[temp];
- if(partword[l]==NULL)goto errout;
- }
-
- /* now we decode residual values for the partitions */
- for(k=0;k<partitions_per_word && i<partvals;k++,i++)
- if(info->secondstages[partword[l][k]]&(1<<s)){
- codebook *stagebook=look->partbooks[partword[l][k]][s];
-
- if(stagebook){
- if(vorbis_book_decodevv_add(stagebook,in,
- i*samples_per_partition+info->begin,ch,
- &vb->opb,samples_per_partition)==-1)
- goto eopbreak;
- }
- }
- }
- }
- }
- errout:
- eopbreak:
- return(0);
-}
-
-
-const vorbis_func_residue residue0_exportbundle={
- NULL,
- &res0_unpack,
- &res0_look,
- &res0_free_info,
- &res0_free_look,
- NULL,
- NULL,
- &res0_inverse
-};
-
-const vorbis_func_residue residue1_exportbundle={
- &res0_pack,
- &res0_unpack,
- &res0_look,
- &res0_free_info,
- &res0_free_look,
- &res1_class,
- &res1_forward,
- &res1_inverse
-};
-
-const vorbis_func_residue residue2_exportbundle={
- &res0_pack,
- &res0_unpack,
- &res0_look,
- &res0_free_info,
- &res0_free_look,
- &res2_class,
- &res2_forward,
- &res2_inverse
-};