release/src/router/libvorbis/lib/barkmel.c

   1 /********************************************************************
   2  *                                                                  *
   3  * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE.   *
   4  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
   5  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
   6  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
   7  *                                                                  *
   8  * THE OggVorbis SOURCE CODE IS (C) COPYRIGHT 1994-2007             *
   9  * by the Xiph.Org Foundation http://www.xiph.org/                  *
  10  *                                                                  *
  11  ********************************************************************
  12
  13  function: bark scale utility
  14  last mod: $Id: barkmel.c 16037 2009-05-26 21:10:58Z xiphmont $
  15
  16  ********************************************************************/
  17
  18 #include <stdio.h>
  19 #include "scales.h"
  20 int main(){
  21   int i;
  22   double rate;
  23   for(i=64;i<32000;i*=2){
  24     rate=48000.f;
  25     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  26             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  27
  28     rate=44100.f;
  29     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  30             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  31
  32     rate=32000.f;
  33     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  34             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  35
  36     rate=22050.f;
  37     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  38             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  39
  40     rate=16000.f;
  41     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  42             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  43
  44     rate=11025.f;
  45     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n",
  46             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  47
  48     rate=8000.f;
  49     fprintf(stderr,"rate=%gHz, block=%d, f(1)=%.2gHz bark(1)=%.2g (of %.2g)\n\n",
  50             rate,i,rate/2 / (i/2),toBARK(rate/2 /(i/2)),toBARK(rate/2));
  51
  52
  53   }
  54   {
  55     float i;
  56     int j;
  57     for(i=0.,j=0;i<28;i+=1,j++){
  58       fprintf(stderr,"(%d) bark=%f %gHz (%d of 128)\n",
  59               j,i,fromBARK(i),(int)(fromBARK(i)/22050.*128.));
  60     }
  61   }
  62   return(0);
  63 }
  64