/************
 * Includes
 * *********/
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include "sndbuf_config.h"
#include "sndbuf_smart.h"


/*************
 * Constants
 * **********/
//-- Geometry --
#define GEOM_FREQ	689.0625
#define GEOM_WAVELENGTH	64
#define GEOM_MICDIST	29

//-- Pattern --
#define PAT_CHAN	1
#define PAT_LEN		1024

//-- Memory --
#define SBUF_CHAN_MAX	2
#define SBUF_LEN_MAX	4096


/********
 * Main
 *******/
int main(int argc, char** argv)
{
  //-- Variable Declarations --
  sndbuf_smart dat(SBUF_CHAN_MAX, SBUF_LEN_MAX);//The sound buffer we're working with
  sndbuf_smart pat(SBUF_CHAN_MAX, SBUF_LEN_MAX);//The pat we're filtering against
  double ang_r;					//The angle of incidence, in radians
  double ang_d;					//The angle of incidence, in degrees
  int 	 iteration;				//How many times have we run?
  time_t now;					//What time is it now?
   
  //-- Generate pattern --
  printf("Generating pat...");
  pat.chan = PAT_CHAN;
  pat.samp = PAT_LEN;
  pat.gen_tone(ALL_CHAN, GEOM_FREQ);
  printf("\tdone.\n");

  //-- Opening sound board --
  dat.dsp_open(BUF_DEVICE);
  
	
  //-- Go! --
  iteration=0;
  while(true)
  {
  	//-- Capture Data --
	dat.dsp_capture();

	//-- Data --
	dat.fir(pat);

	//-- Calculate the angle of incidence --
  	ang_r = dat.incidence_quick(0, 1, GEOM_WAVELENGTH, GEOM_MICDIST);

	//-- Did we get an intelligable result? --
	if (0 == isnan(ang_r))
	{
		//-- Convert to degrees --
		ang_d = ang_r * 180 / M_PI;

		//-- What time is it? --
		time(&now);

		//-- Output --
		printf("%d - %d: Incidence:\t%f\n", (int)now, iteration, ang_d);
	}

	//-- Counter --
	iteration++;
  }

  //-- Close sound board --
  dat.dsp_close();

}