lib/barkmel.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 1994-2000             *
   9  * by Monty <monty@xiph.org> and The XIPHOPHORUS Company            *
  10  * http://www.xiph.org/                                             *
  11  *                                                                  *
  12  ********************************************************************
  13
  14  function: bark scale utility
  15  last mod: $Id: barkmel.c,v 1.1 2000/01/04 09:04:58 xiphmont Exp $
  16
  17  ********************************************************************/
  18
  19 #include <stdio.h>
  20 #include "scales.h"
  21 int main(){
  22   int i;
  23   double rate;
  24   for(i=64;i<32000;i*=2){
  25     rate=48000.;
  26     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  27             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  28
  29     rate=44100.;
  30     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  31             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  32
  33     rate=32000.;
  34     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  35             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  36
  37     rate=22050.;
  38     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  39             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  40
  41     rate=16000.;
  42     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  43             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  44
  45     rate=11025.;
  46     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  47             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  48
  49     rate=8000.;
  50     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n\n",
  51             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  52
  53
  54   }
  55   for(i=0;i<28;i++){
  56     fprintf(stderr,"bark=%d %gHz\n",
  57             i,fromBARK(i));
  58   }
  59   return(0);
  60 }
  61