From 7039a05147b8bbfc829babea1c65bd436450b505 Mon Sep 17 00:00:00 2001
From: Björn Stenberg <bjorn@haxx.se>
Date: Mon, 8 Jan 2007 23:53:00 +0000
Subject: Splitting out songdbj

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11953 a1c6a512-1295-4272-9138-f99709370657
---
 songdbj/com/jcraft/jorbis/CodeBook.java | 742 --------------------------------
 1 file changed, 742 deletions(-)
 delete mode 100644 songdbj/com/jcraft/jorbis/CodeBook.java

(limited to 'songdbj/com/jcraft/jorbis/CodeBook.java')

diff --git a/songdbj/com/jcraft/jorbis/CodeBook.java b/songdbj/com/jcraft/jorbis/CodeBook.java
deleted file mode 100644
index 9708e066a4..0000000000
--- a/songdbj/com/jcraft/jorbis/CodeBook.java
+++ /dev/null
@@ -1,742 +0,0 @@
-/* JOrbis
- * Copyright (C) 2000 ymnk, JCraft,Inc.
- *  
- * Written by: 2000 ymnk<ymnk@jcraft.com>
- *   
- * Many thanks to 
- *   Monty <monty@xiph.org> and 
- *   The XIPHOPHORUS Company http://www.xiph.org/ .
- * JOrbis has been based on their awesome works, Vorbis codec.
- *   
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public License
- * as published by the Free Software Foundation; either version 2 of
- * the License, or (at your option) any later version.
-   
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Library General Public License for more details.
- * 
- * You should have received a copy of the GNU Library General Public
- * License along with this program; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-package com.jcraft.jorbis;
-
-import com.jcraft.jogg.*;
-
-class CodeBook{
-  int dim;            // codebook dimensions (elements per vector)
-  int entries;        // codebook entries
-  StaticCodeBook c=new StaticCodeBook();
-
-  float[] valuelist; // list of dim*entries actual entry values
-  int[] codelist;     // list of bitstream codewords for each entry
-  DecodeAux decode_tree;
-
-  // returns the number of bits
-  int encode(int a, Buffer b){
-    b.write(codelist[a], c.lengthlist[a]);
-    return(c.lengthlist[a]);
-  }
-
-  // One the encode side, our vector writers are each designed for a
-  // specific purpose, and the encoder is not flexible without modification:
-  // 
-  // The LSP vector coder uses a single stage nearest-match with no
-  // interleave, so no step and no error return.  This is specced by floor0
-  // and doesn't change.
-  // 
-  // Residue0 encoding interleaves, uses multiple stages, and each stage
-  // peels of a specific amount of resolution from a lattice (thus we want
-  // to match by threshhold, not nearest match).  Residue doesn't *have* to
-  // be encoded that way, but to change it, one will need to add more
-  // infrastructure on the encode side (decode side is specced and simpler)
-
-  // floor0 LSP (single stage, non interleaved, nearest match)
-  // returns entry number and *modifies a* to the quantization value
-  int errorv(float[] a){
-    int best=best(a,1);
-    for(int k=0;k<dim;k++){
-      a[k]=valuelist[best*dim+k];
-    }
-    return(best);
-  }
-
-  // returns the number of bits and *modifies a* to the quantization value
-  int encodev(int best, float[] a, Buffer b){
-    for(int k=0;k<dim;k++){
-      a[k]=valuelist[best*dim+k];
-    }
-    return(encode(best,b));
-  }
-
-  // res0 (multistage, interleave, lattice)
-  // returns the number of bits and *modifies a* to the remainder value
-  int encodevs(float[] a, Buffer b, int step,int addmul){
-    int best=besterror(a,step,addmul);
-    return(encode(best,b));
-  }
-
-  private int[] t=new int[15];  // decodevs_add is synchronized for re-using t.
-  synchronized int decodevs_add(float[]a, int offset, Buffer b, int n){
-    int step=n/dim;
-    int entry;
-    int i,j,o;
-
-    if(t.length<step){
-      t=new int[step];
-    }
-
-    for(i = 0; i < step; i++){
-      entry=decode(b);
-      if(entry==-1)return(-1);
-      t[i]=entry*dim;
-    }
-    for(i=0,o=0;i<dim;i++,o+=step){
-      for(j=0;j<step;j++){
-	a[offset+o+j]+=valuelist[t[j]+i];
-      }
-    }
-
-    return(0);
-  }
-
-  int decodev_add(float[]a, int offset, Buffer b,int n){
-    int i,j,entry;
-    int t;
-
-    if(dim>8){
-      for(i=0;i<n;){
-        entry = decode(b);
-        if(entry==-1)return(-1);
-	t=entry*dim;
-	for(j=0;j<dim;){
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	}
-      }
-    }
-    else{
-      for(i=0;i<n;){
-	entry=decode(b);
-	if(entry==-1)return(-1);
-	t=entry*dim;
-	j=0;
-	switch(dim){
-	case 8:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 7:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 6:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 5:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 4:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 3:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 2:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 1:
-	  a[offset+(i++)]+=valuelist[t+(j++)];
-	case 0:
-	break;
-	}
-      }
-    }    
-    return(0);
-  }
-
-  int decodev_set(float[] a,int offset, Buffer b, int n){
-    int i,j,entry;
-    int t;
-
-    for(i=0;i<n;){
-      entry = decode(b);
-      if(entry==-1)return(-1);
-      t=entry*dim;
-      for(j=0;j<dim;){
-        a[offset+i++]=valuelist[t+(j++)];
-      }
-    }
-    return(0);
-  }
-
-  int decodevv_add(float[][] a, int offset,int ch, Buffer b,int n){
-    int i,j,k,entry;
-    int chptr=0;
-    //System.out.println("decodevv_add: a="+a+",b="+b+",valuelist="+valuelist);
-
-    for(i=offset/ch;i<(offset+n)/ch;){
-      entry = decode(b);
-      if(entry==-1)return(-1);
-
-      int t = entry*dim;
-      for(j=0;j<dim;j++){
-        a[chptr++][i]+=valuelist[t+j];
-        if(chptr==ch){
-          chptr=0;
-	  i++;
-	}
-      }
-    }
-    return(0);
-  }
-
-
-  // Decode side is specced and easier, because we don't need to find
-  // matches using different criteria; we simply read and map.  There are
-  // two things we need to do 'depending':
-  //   
-  // We may need to support interleave.  We don't really, but it's
-  // convenient to do it here rather than rebuild the vector later.
-  //
-  // Cascades may be additive or multiplicitive; this is not inherent in
-  // the codebook, but set in the code using the codebook.  Like
-  // interleaving, it's easiest to do it here.  
-  // stage==0 -> declarative (set the value)
-  // stage==1 -> additive
-  // stage==2 -> multiplicitive
-
-  // returns the entry number or -1 on eof
-  int decode(Buffer b){
-    int ptr=0;
-    DecodeAux t=decode_tree;
-    int lok=b.look(t.tabn);
-    //System.err.println(this+" "+t+" lok="+lok+", tabn="+t.tabn);
-
-    if(lok>=0){
-      ptr=t.tab[lok];
-      b.adv(t.tabl[lok]);
-      if(ptr<=0){
-        return -ptr;
-      }
-    }
-    do{
-      switch(b.read1()){
-      case 0:
-	ptr=t.ptr0[ptr];
-	break;
-      case 1:
-	ptr=t.ptr1[ptr];
-	break;
-      case -1:
-      default:
-	return(-1);
-      }
-    }
-    while(ptr>0);
-    return(-ptr);
-  }
-
-  // returns the entry number or -1 on eof
-  int decodevs(float[] a, int index, Buffer b, int step,int addmul){
-    int entry=decode(b);
-    if(entry==-1)return(-1);
-    switch(addmul){
-    case -1:
-      for(int i=0,o=0;i<dim;i++,o+=step)
-	a[index+o]=valuelist[entry*dim+i];
-      break;
-    case 0:
-      for(int i=0,o=0;i<dim;i++,o+=step)
-	a[index+o]+=valuelist[entry*dim+i];
-      break;
-    case 1:
-      for(int i=0,o=0;i<dim;i++,o+=step)
-	a[index+o]*=valuelist[entry*dim+i];
-      break;
-    default:
-      //System.err.println("CodeBook.decodeves: addmul="+addmul); 
-    }
-    return(entry);
-  }
-
-  int best(float[] a, int step){
-    EncodeAuxNearestMatch nt=c.nearest_tree;
-    EncodeAuxThreshMatch tt=c.thresh_tree;
-    int ptr=0;
-
-    // we assume for now that a thresh tree is the only other possibility
-    if(tt!=null){
-      int index=0;
-      // find the quant val of each scalar
-      for(int k=0,o=step*(dim-1);k<dim;k++,o-=step){
-	int i;
-	// linear search the quant list for now; it's small and although
-	// with > 8 entries, it would be faster to bisect, this would be
-	// a misplaced optimization for now
-	for(i=0;i<tt.threshvals-1;i++){
-	  if(a[o]<tt.quantthresh[i]){
-	    break;
-	  }
-	}
-	index=(index*tt.quantvals)+tt.quantmap[i];
-      }
-      // regular lattices are easy :-)
-      if(c.lengthlist[index]>0){
-	// is this unused?  If so, we'll
-	// use a decision tree after all
-	// and fall through
-	return(index);
-      }
-    }
-    if(nt!=null){
-      // optimized using the decision tree
-      while(true){
-	float c=0.f;
-	int p=nt.p[ptr];
-	int q=nt.q[ptr];
-	for(int k=0,o=0;k<dim;k++,o+=step){
-	  c+=(valuelist[p+k]-valuelist[q+k])*
-	     (a[o]-(valuelist[p+k]+valuelist[q+k])*.5);
-	}
-	if(c>0.){ // in A
-	  ptr= -nt.ptr0[ptr];
-	}
-	else{     // in B
-	  ptr= -nt.ptr1[ptr];
-	}
-	if(ptr<=0)break;
-      }
-      return(-ptr);
-    }
-
-    // brute force it!
-    {
-      int besti=-1;
-      float best=0.f;
-      int e=0;
-      for(int i=0;i<entries;i++){
-	if(c.lengthlist[i]>0){
-	  float _this=dist(dim, valuelist, e, a, step);
-	  if(besti==-1 || _this<best){
-	    best=_this;
-	    besti=i;
-	  }
-	}
-	e+=dim;
-      }
-      return(besti);
-    }
-  }
-
-  // returns the entry number and *modifies a* to the remainder value
-  int besterror(float[] a, int step, int addmul){
-    int best=best(a,step);
-    switch(addmul){
-    case 0:
-      for(int i=0,o=0;i<dim;i++,o+=step)
-	a[o]-=valuelist[best*dim+i];
-      break;
-    case 1:
-      for(int i=0,o=0;i<dim;i++,o+=step){
-	float val=valuelist[best*dim+i];
-	if(val==0){
-	  a[o]=0;
-	}else{
-	  a[o]/=val;
-	}
-      }
-      break;
-    }
-    return(best);
-  }
-
-  void clear(){
-    // static book is not cleared; we're likely called on the lookup and
-    // the static codebook belongs to the info struct
-    //if(decode_tree!=null){
-    //  free(b->decode_tree->ptr0);
-    //  free(b->decode_tree->ptr1);
-    //  memset(b->decode_tree,0,sizeof(decode_aux));
-    //  free(b->decode_tree);
-    //}
-    //if(valuelist!=null)free(b->valuelist);
-    //if(codelist!=null)free(b->codelist);
-    //memset(b,0,sizeof(codebook));
-  }
-
-  private static float dist(int el, float[] ref, int index, float[] b, int step){
-    float acc=(float)0.;
-    for(int i=0; i<el; i++){
-      float val=(ref[index+i]-b[i*step]);
-      acc+=val*val;
-    }
-    return(acc);
-  }
-
-/*
-  int init_encode(StaticCodeBook s){
-    //memset(c,0,sizeof(codebook));
-    c=s;
-    entries=s.entries;
-    dim=s.dim;
-    codelist=make_words(s.lengthlist, s.entries);
-    valuelist=s.unquantize();
-    return(0);
-  }
-*/
-
-  int init_decode(StaticCodeBook s){
-    //memset(c,0,sizeof(codebook));
-    c=s;
-    entries=s.entries;
-    dim=s.dim;
-    valuelist=s.unquantize();
-
-    decode_tree=make_decode_tree();
-    if(decode_tree==null){
-      //goto err_out;
-      clear();
-      return(-1);
-    }
-    return(0);
-//  err_out:
-//    vorbis_book_clear(c);
-//    return(-1);
-  }
-
-  // given a list of word lengths, generate a list of codewords.  Works
-  // for length ordered or unordered, always assigns the lowest valued
-  // codewords first.  Extended to handle unused entries (length 0)
-  static int[] make_words(int[] l, int n){
-    int[] marker=new int[33];
-    int[] r=new int[n];
-    //memset(marker,0,sizeof(marker));
-
-    for(int i=0;i<n;i++){
-      int length=l[i];
-      if(length>0){
-	int entry=marker[length];
-      
-	// when we claim a node for an entry, we also claim the nodes
-	// below it (pruning off the imagined tree that may have dangled
-	// from it) as well as blocking the use of any nodes directly
-	// above for leaves
-      
-	// update ourself
-	if(length<32 && (entry>>>length)!=0){
-	  // error condition; the lengths must specify an overpopulated tree
-	  //free(r);
-	  return(null);
-	}
-	r[i]=entry;
-    
-	// Look to see if the next shorter marker points to the node
-	// above. if so, update it and repeat.
-	{
-	  for(int j=length;j>0;j--){
-	    if((marker[j]&1)!=0){
-	      // have to jump branches
-	      if(j==1)marker[1]++;
-	      else marker[j]=marker[j-1]<<1;
-	      break; // invariant says next upper marker would already
-                     // have been moved if it was on the same path
-	    }
-	    marker[j]++;
-	  }
-	}
-      
-	// prune the tree; the implicit invariant says all the longer
-	// markers were dangling from our just-taken node.  Dangle them
-	// from our *new* node.
-	for(int j=length+1;j<33;j++){
-	  if((marker[j]>>>1) == entry){
-	    entry=marker[j];
-	    marker[j]=marker[j-1]<<1;
-	  }
-	  else{
-	    break;
-	  }
-	}    
-      }
-    }
-
-    // bitreverse the words because our bitwise packer/unpacker is LSb
-    // endian
-    for(int i=0;i<n;i++){
-      int temp=0;
-      for(int j=0;j<l[i];j++){
-	temp<<=1;
-	temp|=(r[i]>>>j)&1;
-      }
-      r[i]=temp;
-    }
-
-    return(r);
-  }
-
-  // build the decode helper tree from the codewords 
-  DecodeAux make_decode_tree(){
-    int top=0;
-    DecodeAux t=new DecodeAux();
-    int[] ptr0=t.ptr0=new int[entries*2];
-    int[] ptr1=t.ptr1=new int[entries*2];
-    int[] codelist=make_words(c.lengthlist, c.entries);
-
-    if(codelist==null)return(null);
-    t.aux=entries*2;
-
-    for(int i=0;i<entries;i++){
-      if(c.lengthlist[i]>0){
-	int ptr=0;
-	int j;
-	for(j=0;j<c.lengthlist[i]-1;j++){
-	  int bit=(codelist[i]>>>j)&1;
-	  if(bit==0){
-	    if(ptr0[ptr]==0){
-	      ptr0[ptr]=++top;
-	    }
-	    ptr=ptr0[ptr];
-	  }
-	  else{
-	    if(ptr1[ptr]==0){
-	      ptr1[ptr]= ++top;
-	    }
-	    ptr=ptr1[ptr];
-	  }
-	}
-
-	if(((codelist[i]>>>j)&1)==0){ ptr0[ptr]=-i; }
-	else{ ptr1[ptr]=-i; }
-
-      }
-    }
-    //free(codelist);
-
-    t.tabn = ilog(entries)-4;
-
-    if(t.tabn<5)t.tabn=5;
-    int n = 1<<t.tabn;
-    t.tab = new int[n];
-    t.tabl = new int[n];
-    for(int i = 0; i < n; i++){
-      int p = 0;
-      int j=0;
-      for(j = 0; j < t.tabn && (p > 0 || j == 0); j++){
-        if ((i&(1<<j))!=0){
-	  p = ptr1[p];
-	}
-        else{
-	  p = ptr0[p];
-	}
-      }
-      t.tab[i]=p;  // -code
-      t.tabl[i]=j; // length 
-    }
-
-    return(t);
-  }
-
-  private static int ilog(int v){
-    int ret=0;
-    while(v!=0){
-      ret++;
-      v>>>=1;
-    }
-    return(ret);
-  }
-
-/*
-  // TEST
-  // Simple enough; pack a few candidate codebooks, unpack them.  Code a
-  // number of vectors through (keeping track of the quantized values),
-  // and decode using the unpacked book.  quantized version of in should
-  // exactly equal out
-
-  //#include "vorbis/book/lsp20_0.vqh"
-  //#include "vorbis/book/lsp32_0.vqh"
-  //#include "vorbis/book/res0_1a.vqh"
-  static final int TESTSIZE=40;
-
-  static float[] test1={
-    0.105939,
-    0.215373,
-    0.429117,
-    0.587974,
-
-    0.181173,
-    0.296583,
-    0.515707,
-    0.715261,
-
-    0.162327,
-    0.263834,
-    0.342876,
-    0.406025,
-
-    0.103571,
-    0.223561,
-    0.368513,
-    0.540313,
-
-    0.136672,
-    0.395882,
-    0.587183,
-    0.652476,
-
-    0.114338,
-    0.417300,
-    0.525486,
-    0.698679,
-
-    0.147492,
-    0.324481,
-    0.643089,
-    0.757582,
-
-    0.139556,
-    0.215795,
-    0.324559,
-    0.399387,
-
-    0.120236,
-    0.267420,
-    0.446940,
-    0.608760,
-
-    0.115587,
-    0.287234,
-    0.571081,
-    0.708603,
-  };
-
-  static float[] test2={
-    0.088654,
-    0.165742,
-    0.279013,
-    0.395894,
-
-    0.110812,
-    0.218422,
-    0.283423,
-    0.371719,
-
-    0.136985,
-    0.186066,
-    0.309814,
-    0.381521,
-
-    0.123925,
-    0.211707,
-    0.314771,
-    0.433026,
-
-    0.088619,
-    0.192276,
-    0.277568,
-    0.343509,
-
-    0.068400,
-    0.132901,
-    0.223999,
-    0.302538,
-
-    0.202159,
-    0.306131,
-    0.360362,
-    0.416066,
-
-    0.072591,
-    0.178019,
-    0.304315,
-    0.376516,
-
-    0.094336,
-    0.188401,
-    0.325119,
-    0.390264,
-
-    0.091636,
-    0.223099,
-    0.282899,
-    0.375124,
-  };
-
-  static float[] test3={
-    0,1,-2,3,4,-5,6,7,8,9,
-    8,-2,7,-1,4,6,8,3,1,-9,
-    10,11,12,13,14,15,26,17,18,19,
-    30,-25,-30,-1,-5,-32,4,3,-2,0};
-
-//  static_codebook *testlist[]={&_vq_book_lsp20_0,
-//			       &_vq_book_lsp32_0,
-//			       &_vq_book_res0_1a,NULL};
-  static[][] float testvec={test1,test2,test3};
-
-  static void main(String[] arg){
-    Buffer write=new Buffer();
-    Buffer read=new Buffer();
-    int ptr=0;
-    write.writeinit();
-  
-    System.err.println("Testing codebook abstraction...:");
-
-    while(testlist[ptr]!=null){
-      CodeBook c=new CodeBook();
-      StaticCodeBook s=new StaticCodeBook();;
-      float *qv=alloca(sizeof(float)*TESTSIZE);
-      float *iv=alloca(sizeof(float)*TESTSIZE);
-      memcpy(qv,testvec[ptr],sizeof(float)*TESTSIZE);
-      memset(iv,0,sizeof(float)*TESTSIZE);
-
-      System.err.print("\tpacking/coding "+ptr+"... ");
-
-      // pack the codebook, write the testvector
-      write.reset();
-      vorbis_book_init_encode(&c,testlist[ptr]); // get it into memory
-						 // we can write
-      vorbis_staticbook_pack(testlist[ptr],&write);
-      System.err.print("Codebook size "+write.bytes()+" bytes... ");
-      for(int i=0;i<TESTSIZE;i+=c.dim){
-	vorbis_book_encodev(&c,qv+i,&write);
-      }
-      c.clear();
-    
-      System.err.print("OK.\n");
-      System.err.print("\tunpacking/decoding "+ptr+"... ");
-
-      // transfer the write data to a read buffer and unpack/read
-      _oggpack_readinit(&read,_oggpack_buffer(&write),_oggpack_bytes(&write));
-      if(s.unpack(read)){
-	System.err.print("Error unpacking codebook.\n");
-	System.exit(1);
-      }
-      if(vorbis_book_init_decode(&c,&s)){
-	System.err.print("Error initializing codebook.\n");
-	System.exit(1);
-      }
-      for(int i=0;i<TESTSIZE;i+=c.dim){
-	if(vorbis_book_decodevs(&c,iv+i,&read,1,-1)==-1){
-	  System.err.print("Error reading codebook test data (EOP).\n");
-	  System.exit(1);
-	}
-      }
-      for(int i=0;i<TESTSIZE;i++){
-	if(fabs(qv[i]-iv[i])>.000001){
-	  System.err.print("read ("+iv[i]+") != written ("+qv[i]+") at position ("+i+")\n");
-	  System.exit(1);
-	}
-      }
-
-      System.err.print("OK\n");
-      ptr++;
-    }
-    // The above is the trivial stuff; 
-    // now try unquantizing a log scale codebook
-  }
-*/
-}
-
-class DecodeAux{
-  int[] tab;
-  int[] tabl;
-  int tabn;
-
-  int[] ptr0;
-  int[] ptr1;
-  int   aux;        // number of tree entries
-}
-- 
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