/* audior: audio recording program using the Indy audio libraries written by Jason A. Gayman */

#include <stdio.h>
#include <stdlib.h>
#include <dmedia/audio.h>
#include <math.h>
#include <string.h>
#include <errno.h>

long ALgetwidth(ALconfig config);
int ALsetwidth(ALconfig config, long samplesize);

int main(int argc, char **argv)
{
  ALconfig Config1;
  ALport   Port1;
  unsigned char samples[5000];
  unsigned char lookup[65536];
  int i,j,k;
  
  int bits=8,bitconst=1;

  /**************************/

  int bit=10;
  int silcomp=1;

  /**************************/

  int bitpow=1;
  int minlevel=225;
  int maxlevel=30;
  int mincomplen=126;
  unsigned int tempint;
  float temp;
  unsigned char buffer[254];
  unsigned char bufferlen=0;

  long buf[10]={AL_LEFT_INPUT_ATTEN,120,AL_RIGHT_INPUT_ATTEN,120,AL_INPUT_RATE,8000,AL_OUTPUT_RATE,8000,AL_MIC_MODE,AL_MONO};

  bitpow=pow(2,17-bit);

  if (silcomp==0) 
    {
      minlevel=254;
      maxlevel=1;
    }

  Config1=ALnewconfig();
  Port1=ALopenport("AudioPort1","r", Config1);
  ALsetwidth(Config1, AL_SAMPLE_16);
  ALsetparams(AL_DEFAULT_DEVICE,buf,10);
  ALsetconfig(Port1, Config1);
  ALsetqueuesize(Config1,100000);


  for (i=0;i<=65535;i++)
    
    {
      if (i<32768) 
	{
	  lookup[i]=(int) 127.0*log(1+255*(float)i/32768)/log(256);
	}      
      else
	{
	  lookup[i]=256 - (int) 127.0*log(1+255*(65536
		      -(float)i)/32768)/log(256);
	}
     }

  while (1) 
    {
      ALreadsamps(Port1, samples, 254);

      for (j=0;j<=1012;j+=4)
	  samples[j/2]=lookup[((int)(samples[j]*256+samples[j+1])/bitpow)*bitpow];

      for (j=0;j<=506;j+=2)
	{
	  if (samples[j]==255) samples[j]=0;
	  buffer[++bufferlen]=samples[j];
	  if ( (j==506)||((samples[j]<minlevel)&&(samples[j]>maxlevel)) )
	    {
	      if (bufferlen>=mincomplen)
		{
		  putchar(255);
		  putchar(bufferlen);
		}
	      else
		{
		  for (k=1;k<=bufferlen;k++) 
		      putchar(buffer[k]);
		}
	      bufferlen=0;
	    }
	}
    }

  /* note: this is never executed. */
  sleep(2);
  ALfreeconfig(Config1);
  ALcloseport(Port1);  
  exit (0);
}