[16] | 1 | /******************************************************************** |
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| 2 | * * |
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| 3 | * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * |
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| 4 | * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS * |
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| 5 | * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE * |
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| 6 | * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * |
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| 7 | * * |
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| 8 | * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 * |
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| 9 | * by the Xiph.Org Foundation http://www.xiph.org/ * |
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| 10 | * * |
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| 11 | ******************************************************************** |
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| 12 | |
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| 13 | function: utility main for building codebooks from training sets |
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| 14 | last mod: $Id: build.c 13293 2007-07-24 00:09:47Z xiphmont $ |
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| 15 | |
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| 16 | ********************************************************************/ |
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| 17 | |
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| 18 | #include <stdlib.h> |
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| 19 | #include <stdio.h> |
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| 20 | #include <math.h> |
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| 21 | #include <string.h> |
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| 22 | #include <errno.h> |
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| 23 | #include "bookutil.h" |
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| 24 | |
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| 25 | #include "vqgen.h" |
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| 26 | #include "vqsplit.h" |
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| 27 | |
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| 28 | static char *linebuffer=NULL; |
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| 29 | static int lbufsize=0; |
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| 30 | static char *rline(FILE *in,FILE *out){ |
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| 31 | long sofar=0; |
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| 32 | if(feof(in))return NULL; |
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| 33 | |
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| 34 | while(1){ |
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| 35 | int gotline=0; |
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| 36 | |
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| 37 | while(!gotline){ |
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| 38 | if(sofar>=lbufsize){ |
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| 39 | if(!lbufsize){ |
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| 40 | lbufsize=1024; |
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| 41 | linebuffer=_ogg_malloc(lbufsize); |
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| 42 | }else{ |
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| 43 | lbufsize*=2; |
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| 44 | linebuffer=_ogg_realloc(linebuffer,lbufsize); |
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| 45 | } |
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| 46 | } |
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| 47 | { |
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| 48 | long c=fgetc(in); |
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| 49 | switch(c){ |
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| 50 | case '\n': |
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| 51 | case EOF: |
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| 52 | gotline=1; |
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| 53 | break; |
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| 54 | default: |
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| 55 | linebuffer[sofar++]=c; |
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| 56 | linebuffer[sofar]='\0'; |
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| 57 | break; |
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| 58 | } |
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| 59 | } |
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| 60 | } |
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| 61 | |
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| 62 | if(linebuffer[0]=='#'){ |
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| 63 | sofar=0; |
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| 64 | }else{ |
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| 65 | return(linebuffer); |
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| 66 | } |
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| 67 | } |
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| 68 | } |
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| 69 | |
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| 70 | /* command line: |
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| 71 | buildvq file |
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| 72 | */ |
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| 73 | |
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| 74 | int main(int argc,char *argv[]){ |
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| 75 | vqgen v; |
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| 76 | static_codebook c; |
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| 77 | codebook b; |
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| 78 | quant_meta q; |
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| 79 | |
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| 80 | long *quantlist=NULL; |
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| 81 | int entries=-1,dim=-1,aux=-1; |
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| 82 | FILE *out=NULL; |
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| 83 | FILE *in=NULL; |
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| 84 | char *line,*name; |
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| 85 | long i,j,k; |
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| 86 | |
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| 87 | b.c=&c; |
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| 88 | |
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| 89 | if(argv[1]==NULL){ |
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| 90 | fprintf(stderr,"Need a trained data set on the command line.\n"); |
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| 91 | exit(1); |
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| 92 | } |
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| 93 | |
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| 94 | { |
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| 95 | char *ptr; |
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| 96 | char *filename=strdup(argv[1]); |
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| 97 | |
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| 98 | in=fopen(filename,"r"); |
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| 99 | if(!in){ |
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| 100 | fprintf(stderr,"Could not open input file %s\n",filename); |
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| 101 | exit(1); |
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| 102 | } |
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| 103 | |
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| 104 | ptr=strrchr(filename,'-'); |
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| 105 | if(ptr){ |
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| 106 | *ptr='\0'; |
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| 107 | name=strdup(filename); |
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| 108 | sprintf(ptr,".vqh"); |
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| 109 | }else{ |
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| 110 | name=strdup(filename); |
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| 111 | strcat(filename,".vqh"); |
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| 112 | } |
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| 113 | |
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| 114 | out=fopen(filename,"w"); |
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| 115 | if(out==NULL){ |
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| 116 | fprintf(stderr,"Unable to open %s for writing\n",filename); |
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| 117 | exit(1); |
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| 118 | } |
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| 119 | } |
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| 120 | |
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| 121 | /* suck in the trained book */ |
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| 122 | |
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| 123 | /* read book type, but it doesn't matter */ |
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| 124 | line=rline(in,out); |
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| 125 | |
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| 126 | line=rline(in,out); |
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| 127 | if(sscanf(line,"%d %d %d",&entries,&dim,&aux)!=3){ |
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| 128 | fprintf(stderr,"Syntax error reading book file\n"); |
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| 129 | exit(1); |
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| 130 | } |
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| 131 | |
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| 132 | /* just use it to allocate mem */ |
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| 133 | vqgen_init(&v,dim,0,entries,0.f,NULL,NULL,0); |
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| 134 | |
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| 135 | /* quant */ |
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| 136 | line=rline(in,out); |
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| 137 | if(sscanf(line,"%ld %ld %d %d",&q.min,&q.delta, |
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| 138 | &q.quant,&q.sequencep)!=4){ |
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| 139 | fprintf(stderr,"Syntax error reading book file\n"); |
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| 140 | exit(1); |
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| 141 | } |
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| 142 | |
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| 143 | /* quantized entries */ |
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| 144 | /* save quant data; we don't want to requantize later as our method |
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| 145 | is currently imperfect wrt repeated application */ |
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| 146 | i=0; |
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| 147 | quantlist=_ogg_malloc(sizeof(long)*v.elements*v.entries); |
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| 148 | for(j=0;j<entries;j++){ |
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| 149 | float a; |
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| 150 | for(k=0;k<dim;k++){ |
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| 151 | line=rline(in,out); |
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| 152 | sscanf(line,"%f",&a); |
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| 153 | v.entrylist[i]=a; |
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| 154 | quantlist[i++]=rint(a); |
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| 155 | } |
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| 156 | } |
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| 157 | |
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| 158 | /* ignore bias */ |
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| 159 | for(j=0;j<entries;j++)line=rline(in,out); |
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| 160 | free(v.bias); |
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| 161 | v.bias=NULL; |
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| 162 | |
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| 163 | /* training points */ |
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| 164 | { |
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| 165 | float *b=alloca(sizeof(float)*(dim+aux)); |
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| 166 | i=0; |
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| 167 | v.entries=0; /* hack to avoid reseeding */ |
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| 168 | while(1){ |
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| 169 | for(k=0;k<dim+aux;k++){ |
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| 170 | line=rline(in,out); |
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| 171 | if(!line)break; |
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| 172 | sscanf(line,"%f",b+k); |
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| 173 | } |
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| 174 | if(feof(in))break; |
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| 175 | vqgen_addpoint(&v,b,NULL); |
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| 176 | } |
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| 177 | v.entries=entries; |
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| 178 | } |
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| 179 | |
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| 180 | fclose(in); |
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| 181 | vqgen_unquantize(&v,&q); |
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| 182 | |
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| 183 | /* build the book */ |
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| 184 | vqsp_book(&v,&b,quantlist); |
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| 185 | c.q_min=q.min; |
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| 186 | c.q_delta=q.delta; |
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| 187 | c.q_quant=q.quant; |
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| 188 | c.q_sequencep=q.sequencep; |
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| 189 | |
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| 190 | /* save the book in C header form */ |
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| 191 | write_codebook(out,name,b.c); |
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| 192 | |
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| 193 | fclose(out); |
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| 194 | exit(0); |
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| 195 | } |
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