// file: $ECE_8993/util/calculate_lpc/v1.0/calculate_lpc.h
//

// Make sure this file is only included once
//
#ifndef __ISIP_CALCULATE_LPC
#define __ISIP_CALCULATE_LPC

// isip include files
//
#ifndef __ISIP_INTEGRAL
#include <integral.h>
#endif

// function prototypes
//
// function to get the command line parameters
//
logical_1 get_parameter_cc(int argc, char** argv, logical_1& use_hamming,
			   logical_1& apply_pre_emphasis,
			   float_4& pre_emph_coeff, float_4& window_dur,
			   float_4& sample_freq, logical_1& swap_byte,
			   int_4& lp_order, float_4& mid_time,
			   char_1* input_file, int_4& debug_mode);

// function to pre-emphasize the data
//
logical_1 pre_emphasize_data_cc(float_4* data, int_4 num_samples,
				int_4 num_channels, float_4 pre_emph_coeff);

// function to apply a hamming window to the data
//
logical_1 window_hamming_cc(float_4* data, int_4 num_samples,
			    int_4 num_channels);

// function to find the maximum and minimum of a distribution
//
logical_1 find_max_min_cc(float_4** data, float_4* max, float_4* min,
			  int_4 num_values, int_4 num_channels);

// function to compute the lp spectrum
//
logical_1 compute_lp_cc(float_4* data, float_4* lp_spectrum_coeffs,
			 int_4 num_samples, int_4 lp_order);

// function to compute the autocorrelation of a data set
//
logical_1 compute_autocorrelation_cc(float_4* data,
				     float_4* autocor_coeffs,
				     int_4 num_samples, int_4 lp_order);

// function to compute the lp predictor coefficients
//
logical_1 compute_lp_coeffs_cc(float_4* pred_coeffs, int_4 lp_order,
			       float_4* autocor_coeffs, float_4& gain);

// function to compute the spectrum of the lp model given the predictor
// coefficients
//
logical_1 compute_lp_spect_cc(float_4* pred_coeffs, float_4* spect_coeffs,
			      int_4 lp_order, int_4 num_samples,
			      float_4 gain);

// function to compute the dft of a signal
//
logical_1 compute_dft_cc(float_4* data, float_4* dft_data,
			 int_4 num_samples);

// function to debias the data signal
//
logical_1 debias_cc(float_4* data, int_4 num_samples);

// end of file
//
#endif