ref: 094fc8b15f98807833143e29f1f7d36a1ca4b28c
dir: /sys/src/cmd/audio/libvorbis/barkmel.c/
/********************************************************************
* *
* 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 1994-2007 *
* by the Xiph.Org Foundation http://www.xiph.org/ *
* *
********************************************************************
function: bark scale utility
last mod: $Id: barkmel.c 19454 2015-03-02 22:39:28Z xiphmont $
********************************************************************/
#include <stdio.h>
#include "scales.h"
int main(){
int i;
double rate;
for(i=64;i<32000;i*=2){
rate=48000.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=44100.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=32000.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=22050.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=16000.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=11025.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
rate=8000.f;
fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n\n",
rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
}
{
float i;
int j;
for(i=0.,j=0;i<28;i+=1,j++){
fprintf(stderr,"(%d) bark=%f %gHz (%d of 128)\n",
j,i,fromBARK(i),(int)(fromBARK(i)/22050.*128.));
}
}
return(0);
}