/*
   file: fbc.h

*/

/* make sure this file is only included once */

#ifndef __ISIP_FBC
#define __ISIP_FBC

#ifndef __ISIP_FFT
#include "/u0/brown/4012/fft/include/fourier_transform.h"
#define __ISIP_FFT
#endif

/* system include files */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <math.h>

/* important definitions */

#define PROGRAM_NAME "EE4012: Feedback Cancelor"
#define L_FALSE 0
#define L_TRUE  1

#define SSPL_ERROR 1
#define SSPL_NO_ERROR 0

#define ISIP_ERROR 1
#define ISIP_NO_ERROR 0

#define MAX_STRING_LENGTH 1024

#define BYTES_PER_SAMPLE 2

/* local functions */

extern "C" {

  int fbc_cmdl_0_C(char* output_file, char* input_file, float& sample_frequency,
		   int& fft_num, float& frame_duration,
		   float& window_duration, int argc, char** argv); 	
  
  int fbc_check_0_C(int argc, char** argv);

  int fbc_get_0_C(char* output_file, char* input_file, float& sample_frequency,
	       	  int& fft_num, float& frame_duration,
		  float& window_duration, int argc, char** argv);

  int fbc_get_1_C(float& sample_frequency, float& frame_duration,
                  float& window_duration, char* param_file);
		  
  int fbc_comp_0_C(float* buffer_out, float* buffer_in, float sample_frequency,
		   float frame_duration, float window_duration);

  int fbc_read_0_C(float* buffer_in, FILE* fp_in, int frame_duration,
		   float sample_frequency, float frame_duration,
		   float window_duration);

  int fbc_write_0_C(float* filtered_frame, FILE* fp_out,
		    float sample_frequency, float frame_duration);
 
  int fbc_detect_C (double* fft_out, float threshold, float bandwidth,
		    float& center_freq,
		    float max, int fft_num, float sample_frequency);


  int fbc_detect2_C (double* fft_out, float threshold_const2, float bandwidth,
		     float* center_freq2, float* max2, int fft_num,
		     float sample_frequency, int& num_maximums2, int frame_number);  

  int fbc_filter_C(float* buffer_out, float frame_dur_samples, float* filtered_frame,
		   float a1, float a2, float b1, float b2,
		   float& yn1, float& yn2, float& xn1, float& xn2,
		   float& a1_prev, float& a2_prev, float& b1_prev, float& b2_prev,
		   int frame_number);
    
  int fbc_coef_C(float center_freq, float sample_frequency, float bandwidth,
		 float& a1, float& a2, float& b1, float& b2);
		   
  float fbc_round_C(float value);

  int fbc_do_fft_C(char* input_file, float sample_frequency, int fft_num,
		   char* output_fft);
  
}

/* end of file */

#endif