• 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 https://xiph.org/                     *
     *                                                                  *
     ********************************************************************
    
     function: bark scale utility
    
     ********************************************************************/
    
    #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);
    }