X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=lib%2Fres0.c;h=d2b29a69da90ebc4c163331512fb54ee8cba3492;hb=5cf867f4695f4955c145546b8256eccf6736307e;hp=ed0cfdc621395ddec610f63350fbc138585c5f23;hpb=b71261a0a63f1687e62a539c9da263bf73fdd14b;p=platform%2Fupstream%2Flibvorbis.git

diff --git a/lib/res0.c b/lib/res0.c
index ed0cfdc..d2b29a6 100644
--- a/lib/res0.c
+++ b/lib/res0.c
@@ -1,17 +1,17 @@
 /********************************************************************
  *                                                                  *
  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
- * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
- * THE GNU LESSER/LIBRARY PUBLIC LICENSE, WHICH IS INCLUDED WITH    *
- * THIS SOURCE. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.        *
+ * 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 1994-2001             *
  * by the XIPHOPHORUS Company http://www.xiph.org/                  *
  *                                                                  *
  ********************************************************************
 
- function: residue backend 0 implementation
- last mod: $Id: res0.c,v 1.25 2001/02/02 03:51:57 xiphmont Exp $
+ function: residue backend 0, 1 and 2 implementation
+ last mod: $Id: res0.c,v 1.35 2001/08/13 11:33:39 xiphmont Exp $
 
  ********************************************************************/
 
@@ -37,11 +37,18 @@ typedef struct {
   int         map;
   
   int         parts;
+  int         stages;
+  codebook   *fullbooks;
   codebook   *phrasebook;
   codebook ***partbooks;
 
   int         partvals;
   int       **decodemap;
+
+  long      postbits;
+  long      phrasebits;
+  long      frames;
+
 } vorbis_look_residue0;
 
 vorbis_info_residue *res0_copy_info(vorbis_info_residue *vr){
@@ -61,7 +68,36 @@ void res0_free_info(vorbis_info_residue *i){
 void res0_free_look(vorbis_look_residue *i){
   int j;
   if(i){
+
     vorbis_look_residue0 *look=(vorbis_look_residue0 *)i;
+
+    /*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);*/
+
+    /*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);
@@ -73,6 +109,25 @@ void res0_free_look(vorbis_look_residue *i){
   }
 }
 
+static int ilog(unsigned int v){
+  int ret=0;
+  while(v){
+    ret++;
+    v>>=1;
+  }
+  return(ret);
+}
+
+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;
@@ -83,9 +138,19 @@ void res0_pack(vorbis_info_residue *vr,oggpack_buffer *opb){
 					     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++){
-    oggpack_write(opb,info->secondstages[j],4); /* zero *is* a valid choice */
-    acc+=info->secondstages[j];
+    if(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);
@@ -103,17 +168,17 @@ vorbis_info_residue *res0_unpack(vorbis_info *vi,oggpack_buffer *opb){
   info->grouping=oggpack_read(opb,24)+1;
   info->partitions=oggpack_read(opb,6)+1;
   info->groupbook=oggpack_read(opb,8);
+
   for(j=0;j<info->partitions;j++){
-    int cascade=info->secondstages[j]=oggpack_read(opb,4);
-    if(cascade>1)goto errout; /* temporary!  when cascading gets
-                                 reworked and actually used, we don't
-                                 want old code to DTWT */
-    acc+=cascade;
+    int cascade=oggpack_read(opb,3);
+    if(oggpack_read(opb,1))
+      cascade|=(oggpack_read(opb,5)<<3);
+    info->secondstages[j]=cascade;
+
+    acc+=icount(cascade);
   }
-  for(j=0;j<acc;j++){
+  for(j=0;j<acc;j++)
     info->booklist[j]=oggpack_read(opb,8);
-    if(info->booklist[j]==255)info->booklist[j]=-1;
-  }
 
   if(info->groupbook>=ci->books)goto errout;
   for(j=0;j<acc;j++)
@@ -133,24 +198,30 @@ vorbis_look_residue *res0_look (vorbis_dsp_state *vd,vorbis_info_mode *vm,
 
   int j,k,acc=0;
   int dim;
+  int maxstage=0;
   look->info=info;
   look->map=vm->mapping;
 
   look->parts=info->partitions;
+  look->fullbooks=be->fullbooks;
   look->phrasebook=be->fullbooks+info->groupbook;
   dim=look->phrasebook->dim;
 
   look->partbooks=_ogg_calloc(look->parts,sizeof(codebook **));
 
   for(j=0;j<look->parts;j++){
-    int stages=info->secondstages[j];
+    int stages=ilog(info->secondstages[j]);
     if(stages){
-      look->partbooks[j]=_ogg_malloc(stages*sizeof(codebook *));
-      look->partbooks[j][0]=be->fullbooks+info->booklist[acc++];
+      if(stages>maxstage)maxstage=stages;
+      look->partbooks[j]=_ogg_calloc(stages,sizeof(codebook *));
+      for(k=0;k<stages;k++)
+	if(info->secondstages[j]&(1<<k))
+	  look->partbooks[j][k]=be->fullbooks+info->booklist[acc++];
     }
   }
 
   look->partvals=rint(pow(look->parts,dim));
+  look->stages=maxstage;
   look->decodemap=_ogg_malloc(look->partvals*sizeof(int *));
   for(j=0;j<look->partvals;j++){
     long val=j;
@@ -170,8 +241,8 @@ vorbis_look_residue *res0_look (vorbis_dsp_state *vd,vorbis_info_mode *vm,
 
 /* does not guard against invalid settings; eg, a subn of 16 and a
    subgroup request of 32.  Max subn of 128 */
-static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
-		     int auxparts,int auxpartnum){
+static int _interleaved_testhack(float *vec,int n,vorbis_look_residue0 *look,
+				 int auxparts,int auxpartnum){
   vorbis_info_residue0 *info=look->info;
   int i,j=0;
   float max,localmax=0.f;
@@ -191,9 +262,9 @@ static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
   while(1){
     entropy[j]=localmax;
     n>>=1;
+    if(!n)break;
     j++;
 
-    if(n<=0)break;
     for(i=0;i<n;i++){
       temp[i]+=temp[i+n];
     }
@@ -211,129 +282,305 @@ static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
   return(i);
 }
 
-static int _encodepart(oggpack_buffer *opb,float *vec, int n,
-		       int stages, codebook **books,int mode,int part){
-  int i,j=0,bits=0;
-  if(stages){
-    int dim=books[j]->dim;
-    int step=n/dim;
-    for(i=0;i<step;i++){
-      int entry=vorbis_book_besterror(books[j],vec+i,step,0);
+static int _testhack(float *vec,int n,vorbis_look_residue0 *look,
+		     int auxparts,int auxpartnum){
+  vorbis_info_residue0 *info=look->info;
+  int i;
+  float max=0.f;
+  float temp[128];
+  float entropy=0.f;
+
+  /* setup */
+  for(i=0;i<n;i++)temp[i]=fabs(vec[i]);
+
+  for(i=0;i<n;i++)
+    if(temp[i]>max)max=temp[i];
+
+  for(i=0;i<n;i++)temp[i]=rint(temp[i]);
+
+  for(i=0;i<n;i++)
+    entropy+=temp[i];
+
+  for(i=0;i<auxparts-1;i++)
+    if(auxpartnum<info->blimit[i] &&
+       entropy<=info->entmax[i] &&
+       max<=info->ampmax[i])
+      break;
+
+  return(i);
+}
+
+static int _interleaved_encodepart(oggpack_buffer *opb,float *vec, int n,
+				   codebook *book,vorbis_look_residue0 *look){
+  int i,bits=0;
+  int dim=book->dim;
+  int step=n/dim;
 #ifdef TRAIN_RESENT      
-      {
-	char buf[80];
-	FILE *f;
-	sprintf(buf,"res0_%da%d_%d.vqd",mode,j,part);
-	f=fopen(buf,"a");
-	fprintf(f,"%d\n",entry);
-	fclose(f);
-      }
+  char buf[80];
+  FILE *f;
+  sprintf(buf,"res0_b%d.vqd",book-look->fullbooks);
+  f=fopen(buf,"a");
 #endif
-      bits+=vorbis_book_encode(books[j],entry,opb);
-    }
+
+  for(i=0;i<step;i++){
+    int entry=vorbis_book_besterror(book,vec+i,step,0);
+
+#ifdef TRAIN_RESENT      
+    fprintf(f,"%d\n",entry);
+#endif
+
+    bits+=vorbis_book_encode(book,entry,opb);
   }
+
+#ifdef TRAIN_RESENT      
+  fclose(f);
+#endif
   return(bits);
 }
+ 
+static int _encodepart(oggpack_buffer *opb,float *vec, int n,
+		       codebook *book,vorbis_look_residue0 *look){
+  int i,bits=0;
+  int dim=book->dim;
+  int step=n/dim;
+#ifdef TRAIN_RESENT      
+  char buf[80];
+  FILE *f;
+  sprintf(buf,"res0_b%d.vqd",book-look->fullbooks);
+  f=fopen(buf,"a");
+#endif
 
-static int _decodepart(oggpack_buffer *opb,float *work,float *vec, int n,
-		       int stages, codebook **books){
-  int i;
-  
-  memset(work,0,sizeof(float)*n);
-  if(stages){
-    int dim=books[0]->dim;
-    int step=n/dim;
-    if(s_vorbis_book_decodevs(books[0],work,opb,step,0)==-1)
-      return(-1);
+  for(i=0;i<step;i++){
+    int entry=vorbis_book_besterror(book,vec+i*dim,1,0);
+
+#ifdef TRAIN_RESENT      
+    fprintf(f,"%d\n",entry);
+#endif
+
+    bits+=vorbis_book_encode(book,entry,opb);
   }
-  
-  for(i=0;i<n;i++)
-    vec[i]*=work[i];
-  
-  return(0);
+
+#ifdef TRAIN_RESENT      
+  fclose(f);
+#endif
+  return(bits);
 }
 
-int res0_forward(vorbis_block *vb,vorbis_look_residue *vl,
-	    float **in,int ch){
-  long i,j,k,l;
+static long **_01class(vorbis_block *vb,vorbis_look_residue *vl,
+		       float **in,int ch,
+		       int (*classify)(float *,int,vorbis_look_residue0 *,
+				       int,int)){
+  long i,j;
   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 partitions_per_word=look->phrasebook->dim;
   int n=info->end-info->begin;
-  long phrasebits=0,resbitsT=0;
-  long *resbits=alloca(sizeof(long)*possible_partitions);
-  long *resvals=alloca(sizeof(long)*possible_partitions);
 
   int partvals=n/samples_per_partition;
-  int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
   long **partword=_vorbis_block_alloc(vb,ch*sizeof(long *));
 
-  partvals=partwords*partitions_per_word;
-
-  /* we find the patition type for each partition of each
+  /* 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 */
-  
-  memset(resbits,0,sizeof(long)*possible_partitions);
-  memset(resvals,0,sizeof(long)*possible_partitions);
-
+ 
   for(i=0;i<ch;i++){
     partword[i]=_vorbis_block_alloc(vb,n/samples_per_partition*sizeof(long));
     memset(partword[i],0,n/samples_per_partition*sizeof(long));
   }
 
-  for(i=info->begin,l=0;i<info->end;i+=samples_per_partition,l++){
+  for(i=0;i<partvals;i++){
     for(j=0;j<ch;j++)
-      /* do the partition decision based on the number of 'bits'
-         needed to encode the block */
-      partword[j][l]=
-	_testhack(in[j]+i,samples_per_partition,look,possible_partitions,l);
+      /* do the partition decision based on the 'entropy'
+         int the block */
+      partword[j][i]=
+	classify(in[j]+i*samples_per_partition+info->begin,
+		 samples_per_partition,look,possible_partitions,i);
+  
+  }
+
+#ifdef TRAIN_RES
+  {
+    FILE *of;
+    char buffer[80];
+  
+    for(i=0;i<ch;i++){
+      sprintf(buffer,"resaux_%d.vqd",vb->mode);
+      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);
+}
+
+static long **_2class(vorbis_block *vb,vorbis_look_residue *vl,
+		       float **in,int ch,
+		       int (*classify)(float *,int,vorbis_look_residue0 *,
+				       int,int)){
+  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(long *));
+  float *work=alloca(sizeof(float)*samples_per_partition);
+  
+  partword[0]=_vorbis_block_alloc(vb,n*ch/samples_per_partition*sizeof(long));
+  memset(partword[0],0,n*ch/samples_per_partition*sizeof(long));
+
+  for(i=0,j=0,k=0,l=info->begin;i<partvals;i++){
+    for(k=0;k<samples_per_partition;k++){
+      work[k]=in[j][l];
+      j++;
+      if(j>=ch){
+	j=0;
+	l++;
+      }
+    }
+    partword[0][i]=
+      classify(work,samples_per_partition,look,possible_partitions,i);
+  }  
+
+#ifdef TRAIN_RES
+  {
+    FILE *of;
+    char buffer[80];
+  
+    sprintf(buffer,"resaux_%d.vqd",vb->mode);
+    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(vorbis_block *vb,vorbis_look_residue *vl,
+		      float **in,int ch,
+		      int pass,long **partword,
+		      int (*encode)(oggpack_buffer *,float *,int,
+				    codebook *,vorbis_look_residue0 *)){
+  long i,j,k,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 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
+  FILE *of;
+  char buffer[80];
+  int m;
   
+  for(i=0;i<ch;i++){
+    sprintf(buffer,"residue_%d#%d.vqd",vb->mode,pass);
+    of=fopen(buffer,"a");
+    for(m=0;m<info->end;m++)
+      fprintf(of,"%.2f, ",in[i][m]);
+    fprintf(of,"\n");
+    fclose(of);
   }
+#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(i=info->begin,l=0;i<info->end;){
-    
-    /* first we encode a partition codeword for each channel */
-    for(j=0;j<ch;j++){
-      long val=partword[j][l];
-      for(k=1;k<partitions_per_word;k++)
-	val= val*possible_partitions+partword[j][l+k];
-      phrasebits+=vorbis_book_encode(look->phrasebook,val,&vb->opb);
-    }
-    /* now we encode interleaved residual values for the partitions */
-    for(k=0;k<partitions_per_word;k++,l++,i+=samples_per_partition)
-      for(j=0;j<ch;j++){
-	/*resbits[partword[j][l]]+=*/
-	resbitsT+=_encodepart(&vb->opb,in[j]+i,samples_per_partition,
-			      info->secondstages[partword[j][l]],
-			      look->partbooks[partword[j][l]],look->map,partword[j][l]);
-	resvals[partword[j][l]]+=samples_per_partition;
+
+  for(s=(pass==0?0:info->passlimit[pass-1]);s<info->passlimit[pass];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];
+	  long ret;
+	  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)
+	    ret=vorbis_book_encode(look->phrasebook,val,&vb->opb);
+	  /*else
+	    fprintf(stderr,"!");*/
+	  
+	  look->phrasebits+=ret;
+	
+	}
       }
       
+      /* 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=encode(&vb->opb,in[j]+offset,samples_per_partition,
+			     statebook,look);
+	      look->postbits+=ret;
+	      resbits[partword[j][i]]+=ret;
+	    }
+	  }
+	}
+      }
+    }
   }
 
-  for(i=0;i<possible_partitions;i++)resbitsT+=resbits[i];
-  /*fprintf(stderr,
-    "Encoded %ld res vectors in %ld phrasing and %ld res bits\n\t",
-    ch*(info->end-info->begin),phrasebits,resbitsT);
-    for(i=0;i<possible_partitions;i++)
-    fprintf(stderr,"%ld(%ld):%ld ",i,resvals[i],resbits[i]);
-    fprintf(stderr,"\n");*/
- 
+  /*{
+    long total=0;
+    long totalbits=0;
+    fprintf(stderr,"%d :: ",vb->mode);
+    for(k=0;k<possible_partitions;k++){
+      fprintf(stderr,"%ld/%1.2g, ",resvals[k],(float)resbits[k]/resvals[k]);
+      total+=resvals[k];
+      totalbits+=resbits[k];
+    }
+    
+    fprintf(stderr,":: %ld:%1.2g\n",total,(double)totalbits/total);
+    }*/
   return(0);
 }
 
 /* a truncated packet here just means 'stop working'; it's not an error */
-int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,float **in,int ch){
-  long i,j,k,l,transend=vb->pcmend/2;
+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;
 
@@ -341,50 +588,249 @@ int res0_inverse(vorbis_block *vb,vorbis_look_residue *vl,float **in,int ch){
   int samples_per_partition=info->grouping;
   int partitions_per_word=look->phrasebook->dim;
   int n=info->end-info->begin;
-
+  
   int partvals=n/samples_per_partition;
   int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
-  int **partword=alloca(ch*sizeof(long *));
-  float *work=alloca(sizeof(float)*samples_per_partition);
-  partvals=partwords*partitions_per_word;
+  int ***partword=alloca(ch*sizeof(int **));
 
-  /* make sure we're zeroed up to the start */
   for(j=0;j<ch;j++)
-    memset(in[j],0,sizeof(float)*info->begin);
-
-  for(i=info->begin,l=0;i<info->end;){
-    /* 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)goto eopbreak;
-      partword[j]=look->decodemap[temp];
-      if(partword[j]==NULL)goto errout;
-    }
-    
-    /* now we decode interleaved residual values for the partitions */
-    for(k=0;k<partitions_per_word;k++,l++,i+=samples_per_partition)
-      for(j=0;j<ch;j++){
-	int part=partword[j][k];
-	if(_decodepart(&vb->opb,work,in[j]+i,samples_per_partition,
-		    info->secondstages[part],
-		       look->partbooks[part])==-1)goto eopbreak;
+    partword[j]=_vorbis_block_alloc(vb,partwords*sizeof(int *));
+
+  for(s=0;s<look->stages;s++){
+
+    /* each loop decodes on partition codeword containing 
+       partitions_pre_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)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:
-  if(i<transend){
-    for(j=0;j<ch;j++)
-      memset(in[j]+i,0,sizeof(float)*(transend-i));
+  return(0);
+}
+
+/* residue 0 and 1 are just slight variants of one another. 0 is
+   interleaved, 1 is not */
+long **res0_class(vorbis_block *vb,vorbis_look_residue *vl,
+		  float **in,int *nonzero,int ch){
+  /* we encode only the nonzero parts of a bundle */
+  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,_interleaved_testhack));*/
+    return(_01class(vb,vl,in,used,_testhack));
+  else
+    return(0);
+}
+
+int res0_forward(vorbis_block *vb,vorbis_look_residue *vl,
+		 float **in,float **out,int *nonzero,int ch,
+		 int pass, long **partword){
+  /* we encode only the nonzero parts of a bundle */
+  int i,j,used=0,n=vb->pcmend/2;
+  for(i=0;i<ch;i++)
+    if(nonzero[i]){
+      for(j=0;j<n;j++)
+	out[i][j]+=in[i][j];
+      in[used++]=in[i];
+    }
+  if(used){
+    int ret=_01forward(vb,vl,in,used,pass,partword,
+		      _interleaved_encodepart);
+    used=0;
+    for(i=0;i<ch;i++)
+      if(nonzero[i]){
+	for(j=0;j<n;j++)
+	  out[i][j]-=in[used][j];
+	used++;
+      }
+    return(ret);
+  }else
+    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(vorbis_block *vb,vorbis_look_residue *vl,
+		 float **in,float **out,int *nonzero,int ch,
+		 int pass, long **partword){
+  int i,j,used=0,n=vb->pcmend/2;
+  for(i=0;i<ch;i++)
+    if(nonzero[i]){
+      for(j=0;j<n;j++)
+	out[i][j]+=in[i][j];
+      in[used++]=in[i];
+    }
+
+  if(used){
+    int ret=_01forward(vb,vl,in,used,pass,partword,_encodepart);
+    used=0;
+    for(i=0;i<ch;i++)
+      if(nonzero[i]){
+	for(j=0;j<n;j++)
+	  out[i][j]-=in[used][j];
+	used++;
+      }
+    return(ret);
+  }else
+    return(0);
+}
+
+long **res1_class(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(_01class(vb,vl,in,used,_testhack));
+  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,
+		  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(_2class(vb,vl,in,used,_testhack));
+  else
+    return(0);
+}
+
+/* res2 is slightly more different; all the channels are interleaved
+   into a single vector and encoded. */
+
+int res2_forward(vorbis_block *vb,vorbis_look_residue *vl,
+		 float **in,float **out,int *nonzero,int ch,
+		 int pass,long **partword){
+  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 :-( */
+  float *work=_vorbis_block_alloc(vb,ch*n*sizeof(float));
+  for(i=0;i<ch;i++){
+    float *pcm=in[i];
+    if(nonzero[i])used++;
+    for(j=0,k=i;j<n;j++,k+=ch)
+      work[k]=pcm[j];
   }
+  
+  if(used){
+    int ret=_01forward(vb,vl,&work,1,pass,partword,_encodepart);
+    /* update the sofar vector */
+    for(i=0;i<ch;i++){
+      float *pcm=in[i];
+      float *sofar=out[i];
+      for(j=0,k=i;j<n;j++,k+=ch)
+	sofar[j]+=pcm[j]-work[k];
+    }
 
-  return(0);
+    return(ret);
+  }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 n=info->end-info->begin;
+
+  int partvals=n/samples_per_partition;
+  int partwords=(partvals+partitions_per_word-1)/partitions_per_word;
+  int **partword=_vorbis_block_alloc(vb,partwords*sizeof(int *));
+
+  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)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:
-  for(j=0;j<ch;j++)
-    memset(in[j],0,sizeof(float)*transend);
+ eopbreak:
   return(0);
 }
 
+
 vorbis_func_residue residue0_exportbundle={
   &res0_pack,
   &res0_unpack,
@@ -392,6 +838,31 @@ vorbis_func_residue residue0_exportbundle={
   &res0_copy_info,
   &res0_free_info,
   &res0_free_look,
+  &res0_class,
   &res0_forward,
   &res0_inverse
 };
+
+vorbis_func_residue residue1_exportbundle={
+  &res0_pack,
+  &res0_unpack,
+  &res0_look,
+  &res0_copy_info,
+  &res0_free_info,
+  &res0_free_look,
+  &res1_class,
+  &res1_forward,
+  &res1_inverse
+};
+
+vorbis_func_residue residue2_exportbundle={
+  &res0_pack,
+  &res0_unpack,
+  &res0_look,
+  &res0_copy_info,
+  &res0_free_info,
+  &res0_free_look,
+  &res2_class,
+  &res2_forward,
+  &res2_inverse
+};