vq/build.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE.  *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
   5  * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *
   6  * PLEASE READ THESE TERMS DISTRIBUTING.                            *
   7  *                                                                  *
   8  * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-1999             *
   9  * by 1999 Monty <monty@xiph.org> and The XIPHOPHORUS Company       *
  10  * http://www.xiph.org/                                             *
  11  *                                                                  *
  12  ********************************************************************
  13
  14  function: utility main for building codebooks from training sets
  15  author: Monty <xiphmont@mit.edu>
  16  modifications by: Monty
  17  last modification date: Dec 15 1999
  18
  19  ********************************************************************/
  20
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <math.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include "vqgen.h"
  27
  28 static char *linebuffer=NULL;
  29 static int  lbufsize=0;
  30 static char *rline(FILE *in,FILE *out){
  31   long sofar=0;
  32   if(feof(in))return NULL;
  33
  34   while(1){
  35     int gotline=0;
  36
  37     while(!gotline){
  38       if(sofar>=lbufsize){
  39         if(!lbufsize){
  40           lbufsize=1024;
  41           linebuffer=malloc(lbufsize);
  42         }else{
  43           lbufsize*=2;
  44           linebuffer=realloc(linebuffer,lbufsize);
  45         }
  46       }
  47       {
  48         long c=fgetc(in);
  49         switch(c){
  50         case '\n':
  51         case EOF:
  52           gotline=1;
  53           break;
  54         default:
  55           linebuffer[sofar++]=c;
  56           linebuffer[sofar]='\0';
  57           break;
  58         }
  59       }
  60     }
  61
  62     if(linebuffer[0]=='#'){
  63       sofar=0;
  64     }else{
  65       return(linebuffer);
  66     }
  67   }
  68 }
  69
  70 /* command line:
  71    buildvq file
  72 */
  73
  74 int main(int argc,char *argv[]){
  75   vqgen v;
  76   vqbook b;
  77   quant_meta q;
  78   long *quantlist=NULL;
  79
  80   int entries=-1,dim=-1,aux=-1;
  81   FILE *out=NULL;
  82   FILE *in=NULL;
  83   char *line,*name;
  84   long i,j,k;
  85
  86   if(argv[1]==NULL){
  87     fprintf(stderr,"Need a trained data set on the command line.\n");
  88     exit(1);
  89   }
  90
  91   {
  92     char *ptr;
  93     char *filename=strdup(argv[1]);
  94
  95     in=fopen(filename,"r");
  96     if(!in){
  97       fprintf(stderr,"Could not open input file %s\n",filename);
  98       exit(1);
  99     }
 100
 101     ptr=strrchr(filename,'-');
 102     if(ptr){
 103       *ptr='\0';
 104       name=strdup(filename);
 105       sprintf(ptr,".vqh");
 106     }else{
 107       name=strdup(filename);
 108       strcat(filename,".vqh");
 109     }
 110
 111     out=fopen(filename,"w");
 112     if(out==NULL){
 113       fprintf(stderr,"Unable to open %s for writing\n",filename);
 114       exit(1);
 115     }
 116   }
 117
 118   /* suck in the trained book */
 119
 120   /* read book type, but it doesn't matter */
 121   line=rline(in,out);
 122
 123   line=rline(in,out);
 124   if(sscanf(line,"%d %d %d",&entries,&dim,&aux)!=3){
 125     fprintf(stderr,"Syntax error reading book file\n");
 126     exit(1);
 127   }
 128
 129   /* just use it to allocate mem */
 130   vqgen_init(&v,dim,0,entries,NULL,NULL);
 131
 132   /* quant */
 133   line=rline(in,out);
 134   if(sscanf(line,"%ld %ld %d %d",&q.min,&q.delta,
 135             &q.quant,&q.sequencep)!=4){
 136     fprintf(stderr,"Syntax error reading book file\n");
 137     exit(1);
 138   }
 139
 140   /* quantized entries */
 141   /* save quant data; we don't want to requantize later as our method
 142      is currently imperfect wrt repeated application */
 143   i=0;
 144   quantlist=malloc(sizeof(long)*v.elements*v.entries);
 145   for(j=0;j<entries;j++){
 146     double a;
 147     for(k=0;k<dim;k++){
 148       line=rline(in,out);
 149       sscanf(line,"%lf",&a);
 150       v.entrylist[i]=a;
 151       quantlist[i++]=rint(a);
 152     }
 153   }
 154
 155   /* ignore bias */
 156   for(j=0;j<entries;j++)line=rline(in,out);
 157   free(v.bias);
 158   v.bias=NULL;
 159
 160   /* training points */
 161   {
 162     double *b=alloca(sizeof(double)*(dim+aux));
 163     i=0;
 164     v.entries=0; /* hack to avoid reseeding */
 165     while(1){
 166       for(k=0;k<dim+aux;k++){
 167         line=rline(in,out);
 168         if(!line)break;
 169         sscanf(line,"%lf",b+k);
 170       }
 171       if(feof(in))break;
 172       vqgen_addpoint(&v,b,NULL);
 173     }
 174     v.entries=entries;
 175   }
 176
 177   fclose(in);
 178   vqgen_unquantize(&v,&q);
 179
 180   /* build the book */
 181   vqsp_book(&v,&b,quantlist);
 182
 183   /* save the book in C header form */
 184   fprintf(out,
 185  "/********************************************************************\n"
 186  " *                                                                  *\n"
 187  " * THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE.  *\n"
 188  " * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *\n"
 189  " * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE.    *\n"
 190  " * PLEASE READ THESE TERMS DISTRIBUTING.                            *\n"
 191  " *                                                                  *\n"
 192  " * THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-1999             *\n"
 193  " * by 1999 Monty <monty@xiph.org> and The XIPHOPHORUS Company       *\n"
 194  " * http://www.xiph.org/                                             *\n"
 195  " *                                                                  *\n"
 196  " ********************************************************************\n"
 197  "\n"
 198  " function: static codebook autogenerated by vq/vqbuild\n"
 199  "\n"
 200  " ********************************************************************/\n\n");
 201
 202   fprintf(out,"#ifndef _V_%s_VQH_\n#define _V_%s_VQH_\n",name,name);
 203   fprintf(out,"#include \"vqgen.h\"\n\n");
 204
 205   /* first, the static vectors, then the book structure to tie it together. */
 206   /* quantlist */
 207   fprintf(out,"static long _vq_quantlist_%s[] = {\n",name);
 208   i=0;
 209   for(j=0;j<entries;j++){
 210     fprintf(out,"\t");
 211     for(k=0;k<dim;k++)
 212       fprintf(out,"%ld, ",b.quantlist[i++]);
 213     fprintf(out,"\n");
 214   }
 215   fprintf(out,"};\n\n");
 216
 217   /* codelist */
 218   fprintf(out,"static long _vq_codelist_%s[] = {\n",name);
 219   for(j=0;j<entries;j++){
 220     fprintf(out,"\t%ld,\n",b.codelist[j]);
 221   }
 222   fprintf(out,"};\n\n");
 223
 224   /* lengthlist */
 225   fprintf(out,"static long _vq_lengthlist_%s[] = {\n",name);
 226   for(j=0;j<entries;j++){
 227     fprintf(out,"\t%ld,\n",b.lengthlist[j]);
 228   }
 229   fprintf(out,"};\n\n");
 230
 231   /* ptr0 */
 232   fprintf(out,"static long _vq_ptr0_%s[] = {\n",name);
 233   for(j=0;j<b.aux;j++){
 234     fprintf(out,"\t%ld,\n",b.ptr0[j]);
 235   }
 236   fprintf(out,"};\n\n");
 237
 238   /* ptr1 */
 239   fprintf(out,"static long _vq_ptr1_%s[] = {\n",name);
 240   for(j=0;j<b.aux;j++){
 241     fprintf(out,"\t%ld,\n",b.ptr1[j]);
 242   }
 243   fprintf(out,"};\n\n");
 244
 245   /* n */
 246   fprintf(out,"static double _vq_n_%s[] = {\n",name);
 247   i=0;
 248   for(j=0;j<b.aux;j++){
 249     fprintf(out,"\t");
 250     for(k=0;k<dim;k++)
 251       fprintf(out,"%g,",b.n[i++]);
 252     fprintf(out,"\n");
 253   }
 254   fprintf(out,"};\n\n");
 255
 256   /* c */
 257   fprintf(out,"static double _vq_c_%s[] = {\n",name);
 258   for(j=0;j<b.aux;j++){
 259     fprintf(out,"\t%g,\n",b.c[j]);
 260   }
 261   fprintf(out,"};\n\n");
 262
 263   /* tie it all together */
 264   fprintf(out,"static vqbook _vq_book_%s = {\n",name);
 265   fprintf(out,"\t%ld, %ld, %ld, %ld, %d, %d,\n",
 266           b.dim,b.entries,q.min,q.delta,q.quant,q.sequencep);
 267   fprintf(out,"\t0,\n"); /* valuelist */
 268   fprintf(out,"\t_vq_quantlist_%s,\n",name);
 269   fprintf(out,"\t_vq_codelist_%s,\n",name);
 270   fprintf(out,"\t_vq_lengthlist_%s,\n",name);
 271   fprintf(out,"\t_vq_ptr0_%s,\n",name);
 272   fprintf(out,"\t_vq_ptr1_%s,\n",name);
 273   fprintf(out,"\t_vq_n_%s,\n",name);
 274   fprintf(out,"\t_vq_c_%s,\n",name);
 275   fprintf(out,"\t%ld, %ld };\n\n",b.aux,b.aux);
 276
 277   fprintf(out,"\n#endif\n");
 278   fclose(out);
 279   exit(0);
 280 }