// file: fbc_coef.C
//
// Compute the coeffients for the filter for one frame of data.
//

#include "fbc.h"

int fbc_coef_C(float center_freq, float sample_frequency, float bandwidth,
	       float& a1, float& a2, float& b1, float& b2){
  
  // compute normalized values of bandwidth and center frequency
  //
  float bw = 2 * 3.14 * bandwidth / sample_frequency;
  float cf = 2 * 3.14 * center_freq / sample_frequency;
  
  // compute coefiecients
  //
  a1 = -2.0 * bw * cos(cf);
  b1 = -2.0 * cos(cf);
  a2 = bw * bw;
  b2 = 1.0;

/*  
printf("sample_freq: %f\n",sample_frequency);
printf("center: %f\n",center_freq);
printf("bandwidth: %f\n",bandwidth);
printf("a1: %f\n",a1);
printf("a2: %f\n",a2);
printf("b1: %f\n",b1);
printf("b2: %f\n",b2);
*/
  
  // exit gracefully
  //
  return L_TRUE;

}