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/********************************************************************
* *
* THIS FILE IS PART OF THE Ogg Vorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS DISTRIBUTING. *
* *
* THE OggSQUISH SOURCE CODE IS (C) COPYRIGHT 1994-2000 *
* by Monty <monty@xiph.org> and The XIPHOPHORUS Company *
* http://www.xiph.org/ *
* *
********************************************************************
function: utility main for setting entropy encoding parameters
for lattice codebooks
last mod: $Id: latticetune.c,v 1.1.2.1 2000/08/15 08:33:48 xiphmont Exp $
********************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include "vorbis/codebook.h"
#include "../lib/sharedbook.h"
#include "bookutil.h"
/* This util takes a training-collected file listing codewords used in
LSP fitting, then generates new codeword lengths for maximally
efficient integer-bits entropy encoding.
command line:
latticetune book.vqh input.vqd [unused_entriesp]
latticetune produces book.vqh on stdout */
int main(int argc,char *argv[]){
codebook *b;
static_codebook *c;
long *lengths;
long *hits;
int entries=-1,dim=-1,guard=1;
FILE *in=NULL;
char *line,*name;
long j;
if(argv[1]==NULL){
fprintf(stderr,"Need a lattice codebook on the command line.\n");
exit(1);
}
if(argv[2]==NULL){
fprintf(stderr,"Need a codeword data file on the command line.\n");
exit(1);
}
if(argv[3]!=NULL)guard=0;
{
char *ptr;
char *filename=strdup(argv[1]);
b=codebook_load(filename);
c=(static_codebook *)(b->c);
ptr=strrchr(filename,'.');
if(ptr){
*ptr='\0';
name=strdup(filename);
}else{
name=strdup(filename);
}
}
if(c->maptype!=1){
fprintf(stderr,"Provided book is not a latticebook.\n");
exit(1);
}
entries=b->entries;
dim=b->dim;
hits=malloc(entries*sizeof(long));
lengths=calloc(entries,sizeof(long));
for(j=0;j<entries;j++)hits[j]=guard;
in=fopen(argv[2],"r");
if(!in){
fprintf(stderr,"Could not open input file %s\n",argv[2]);
exit(1);
}
if(!strcmp(argv[0],"latticetune")){
long lines=0;
line=setup_line(in);
while(line){
long code;
lines++;
if(!(lines&0xfff))spinnit("codewords so far...",lines);
if(sscanf(line,"%ld",&code)==1)
hits[code]++;
line=setup_line(in);
}
}
if(!strcmp(argv[0],"restune")){
long step;
long lines=0;
long cols=-1;
double *vec;
line=setup_line(in);
while(line){
int code;
if(!(lines&0xfff))spinnit("codewords so far...",lines);
if(cols==-1){
char *temp=line;
while(*temp==' ')temp++;
for(cols=0;*temp;cols++){
while(*temp>32)temp++;
while(*temp==' ')temp++;
}
vec=alloca(sizeof(double)*cols);
step=cols/dim;
}
for(j=0;j<cols;j++)
if(get_line_value(in,vec+j)){
fprintf(stderr,"Too few columns on line %ld in data file\n",lines);
exit(1);
}
for(j=0;j<step;j++){
lines++;
code=_best(b,vec+j,step);
hits[code]++;
}
line=setup_line(in);
}
}
fclose(in);
/* build the codeword lengths */
build_tree_from_lengths0(entries,hits,lengths);
c->lengthlist=lengths;
write_codebook(stdout,name,c);
fprintf(stderr,"\r "
"\nDone.\n");
exit(0);
}
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