c/beermeter/audio.c

   1 #include <stdio.h>
   2
   3 #define SAMPLE_MIN -128
   4 #define SAMPLE_MAX 127
   5
   6 int main() {
   7         unsigned long count=0;
   8         char sample, sample_last=SAMPLE_MIN, x=0, y=0;
   9         while(!feof(stdin)) {
  10                 fread(&sample,1,1,stdin);
  11                 if(
  12                         (sample_last < 0 && sample > SAMPLE_MAX/2)
  13                         || (sample_last >= 0 && sample < SAMPLE_MIN/2)
  14                 )
  15                 {
  16                         putchar('.');
  17                         //printf("\r%lu    ", ++count);
  18                         fflush(stdout);
  19                         sample_last=sample;
  20                 }
  21         }
  22 }