// file: calculate_lpc.h
//
// function prototypes
//

// make sure definitions are only made once
//
#ifndef __CALCULATE_LPC
#define __CALCULATE_LPC

// function definitions
//
extern "C" {

  // parameter parsing functions
  //
  int get_parameters_cc (char*& datafile_a, float& frame_size_a,
			 float& win_size_a, float& win_center_time_a,
			 float& sample_freq_a, int& num_chans_a,
			 float& preemp_val_a, int& win_type_a,
			 int& lp_order_a, int& dft_order_a, int& debug_mode_a,
			 char** argv_a, int argc_a);
  
  int check_parameters_cc (char* datafile_a, float frame_size_a,
			   float win_size_a, float win_center_time,
			   float sample_freq_a, int num_chans_a,
			   float preemp_val_a, int win_type_a, int lp_order_a,
			   int dft_order_a, int debug_mode_a);
  
  // i/o functions
  //
  int read_signal_cc (float*& signal_window_a, int num_chans_a,
		      int start_sample_a, int end_sample_a,
		      int end_file_sample_a, char* datafile_a,
		      int debug_mode_a);

  int print_buffer_cc (float** buffer_a, int num_chans_a, int num_items_a,
		       float sample_freq_a);

  // calculate functions
  //
  int calculate_num_samples_cc (float duration, float sample_freq_a);

  int calculate_end_sample_cc (char* input_file_a, float sample_freq_a,
			      int num_chans_a);

  int debias_signal_cc (float*& signal_a, int samples_per_win_a,
			int num_chans_a, int debug_mode_a);

  int pre_emphasize_signal_cc (float*& signal_window_a, float*& prev_sig_val_a,
			       int samples_per_win_a, int num_chans_a, 
			       float preemp_val_a, int debug_mode_a);

  int window_signal_cc (float*& signal_window_a, int samples_per_win_a,
			int num_chans_a, int win_type_a, int debug_mode_a);

  int calculate_dft_cc (float**& dft_signal_a, float* signal_window_a,
			int samples_per_win_a, int num_chans_a,
			int dft_order_a, int debug_mode_a);
  
  int calculate_lp_cc (float**& lp_spect_coeffs_a, float*& lp_gain_a,
		       float* signal_window_a, int samples_per_win_a,
		       int num_chans_a, int lp_order_a, int debug_mode_a);

  int calculate_autocorr_cc (float**& autocorr_coeffs_a,
			     float* signal_window_a, int samples_per_win_a,
			     int num_chans_a, int lp_order_a,
			     int debug_mode_a);
  
  int calculate_pred_coeff_cc (float**& pred_coeffs_a, float*& gain_a,
			       float** autocorr_coeffs_a, int num_chans_a,
			       int lp_order_a, int debug_mode_a);

  int calculate_spect_cc (float**& lp_signal_a, float** pred_coeffs_a,
			  float* lp_gain_a, int samples_per_win_a,
			  int num_chans_a, int lp_order_a, int debug_mode_a);
}


// end of file
//
#endif