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Diffstat (limited to 'vq/latticetune.c')
| -rw-r--r-- | vq/latticetune.c | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/vq/latticetune.c b/vq/latticetune.c new file mode 100644 index 00000000..5b5b2424 --- /dev/null +++ b/vq/latticetune.c @@ -0,0 +1,156 @@ +/******************************************************************** + * * + * 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); +} |