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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2001 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: utility for finding the distribution in a data set
********************************************************************/
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include "bookutil.h"
/* command line:
distribution file.vqd
*/
int ascend(const void *a,const void *b){
return(**((long **)a)-**((long **)b));
}
int main(int argc,char *argv[]){
FILE *in;
long lines=0;
float min;
float max;
long bins=-1;
int flag=0;
long *countarray;
long total=0;
char *line;
if(argv[1]==NULL){
fprintf(stderr,"Usage: distribution {data.vqd [bins]| book.vqh} \n\n");
exit(1);
}
if(argv[2]!=NULL)
bins=atoi(argv[2])-1;
in=fopen(argv[1],"r");
if(!in){
fprintf(stderr,"Could not open input file %s\n",argv[1]);
exit(1);
}
if(strrchr(argv[1],'.') && strcmp(strrchr(argv[1],'.'),".vqh")==0){
/* load/decode a book */
codebook *b=codebook_load(argv[1]);
static_codebook *c=(static_codebook *)(b->c);
float delta;
int i;
fclose(in);
switch(c->maptype){
case 0:
printf("entropy codebook only; no mappings\n");
exit(0);
break;
case 1:
bins=_book_maptype1_quantvals(c);
break;
case 2:
bins=c->entries*c->dim;
break;
}
max=min=_float32_unpack(c->q_min);
delta=_float32_unpack(c->q_delta);
for(i=0;i<bins;i++){
float val=c->quantlist[i]*delta+min;
if(val>max)max=val;
}
printf("Minimum scalar value: %f\n",min);
printf("Maximum scalar value: %f\n",max);
switch(c->maptype){
case 1:
{
/* lattice codebook. dump it. */
int j,k;
long maxcount=0;
long **sort=calloc(bins,sizeof(long *));
long base=c->lengthlist[0];
countarray=calloc(bins,sizeof(long));
for(i=0;i<bins;i++)sort[i]=c->quantlist+i;
qsort(sort,bins,sizeof(long *),ascend);
for(i=0;i<b->entries;i++)
if(c->lengthlist[i]>base)base=c->lengthlist[i];
/* dump a full, correlated count */
for(j=0;j<b->entries;j++){
if(c->lengthlist[j]){
int indexdiv=1;
printf("%4d: ",j);
for(k=0;k<b->dim;k++){
int index= (j/indexdiv)%bins;
printf("%+3.1f,", c->quantlist[index]*_float32_unpack(c->q_delta)+
_float32_unpack(c->q_min));
indexdiv*=bins;
}
printf("\t|");
for(k=0;k<base-c->lengthlist[j];k++)printf("*");
printf("\n");
}
}
/* do a rough count */
for(j=0;j<b->entries;j++){
int indexdiv=1;
for(k=0;k<b->dim;k++){
if(c->lengthlist[j]){
int index= (j/indexdiv)%bins;
countarray[index]+=(1<<(base-c->lengthlist[j]));
indexdiv*=bins;
}
}
}
/* dump the count */
{
long maxcount=0,i,j;
for(i=0;i<bins;i++)
if(countarray[i]>maxcount)maxcount=countarray[i];
for(i=0;i<bins;i++){
int ptr=sort[i]-c->quantlist;
int stars=rint(50./maxcount*countarray[ptr]);
printf("%+08f (%8ld) |",c->quantlist[ptr]*delta+min,countarray[ptr]);
for(j=0;j<stars;j++)printf("*");
printf("\n");
}
}
}
break;
case 2:
{
/* trained, full mapping codebook. */
printf("Can't do probability dump of a trained [type 2] codebook (yet)\n");
}
break;
}
}else{
/* load/count a data file */
/* do it the simple way; two pass. */
line=setup_line(in);
while(line){
float code;
char buf[80];
lines++;
sprintf(buf,"getting min/max (%.2f::%.2f). lines...",min,max);
if(!(lines&0xff))spinnit(buf,lines);
while(!flag && sscanf(line,"%f",&code)==1){
line=strchr(line,',');
min=max=code;
flag=1;
}
while(line && sscanf(line,"%f",&code)==1){
line=strchr(line,',');
if(line)line++;
if(code<min)min=code;
if(code>max)max=code;
}
line=setup_line(in);
}
if(bins<1){
if((int)(max-min)==min-max){
bins=max-min;
}else{
bins=25;
}
}
printf("\r \r");
printf("Minimum scalar value: %f\n",min);
printf("Maximum scalar value: %f\n",max);
if(argv[2]){
printf("\n counting hits into %ld bins...\n",bins+1);
countarray=calloc(bins+1,sizeof(long));
rewind(in);
line=setup_line(in);
while(line){
float code;
lines--;
if(!(lines&0xff))spinnit("counting distribution. lines so far...",lines);
while(line && sscanf(line,"%f",&code)==1){
line=strchr(line,',');
if(line)line++;
code-=min;
code/=(max-min);
code*=bins;
countarray[(int)rint(code)]++;
total++;
}
line=setup_line(in);
}
/* make a pretty graph */
{
long maxcount=0,i,j;
for(i=0;i<bins+1;i++)
if(countarray[i]>maxcount)maxcount=countarray[i];
printf("\r \r");
printf("Total scalars: %ld\n",total);
for(i=0;i<bins+1;i++){
int stars=rint(50./maxcount*countarray[i]);
printf("%08f (%8ld) |",(max-min)/bins*i+min,countarray[i]);
for(j=0;j<stars;j++)printf("*");
printf("\n");
}
}
}
fclose(in);
}
printf("\nDone.\n");
exit(0);
}
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