/**************************************************************************/
/*                         File: spectrum_prms.h                          */
/**************************************************************************/
/* Project: Computing spectrum of a given signal Class: EE 8993 Spring 96 */
/* Author: Neeraj Deshmukh                           Date: March 2, 1996  */
/**************************************************************************/

/*========================================================================
  This file declares the various parameters and the classes for spectral 
  computation of any given signal
  ========================================================================*/
/*------------------------------------------------------------------------
  make sure definitions are only made once
  ------------------------------------------------------------------------*/
#ifndef __ISIP_SPECTRUM_PRMS
#define __ISIP_SPECTRUM_PRMS

/*------------------------------------------------------------------------
  system and ISIP include files
  these are sourced from a local standard definitions file in
  ~deshmukh/source/standard_files/
  ------------------------------------------------------------------------*/
#include "my_std_defs.h"

/*------------------------------------------------------------------------
  declaration of global constants
  ------------------------------------------------------------------------*/
#define DEFAULT_SAMPLE_FREQUENCY        8000             // sampling rate
#define DEFAULT_MAX_FRAMES              1500             // total frames
#define DEFAULT_FFT_ORDER               1024
#define DEFAULT_SAMPLE_SCALE_FACTOR     3.05185e-05      // normalize samples
#define LOG_2_FACTOR                    3.3219281

/*------------------------------------------------------------------------
  declaration of global functions
  ------------------------------------------------------------------------*/
extern void    debias_signal_cc (int_2 *input_fr_l, int_2 win_dur_l);
extern void    compute_twiddle_factors_cc (float_4 *tw_real_l, float_4 *tw_imag_l, 
					   int_2 fft_ord_l);

extern void    compute_fft_cc (float_4 *fft_fr_l, float_4 *twid_real_l, 
			       float_4 *twid_imag_l, int_2 fft_ord_l);

extern void    compute_dft_cc (float_4 *fft_fr_l, float_4 *twid_real_l, 
			       float_4 *twid_imag_l, int_2 fft_ord_l);

extern float_4 compute_lp_cc (float_4 *lp_pred_l, int_2 lp_ord_l, float_4 *autocorr_l);

extern void    lp_response_cc (float_4 *lp_pred_l, float_4 *twid_real_l, 
			       float_4 *twid_imag_l, float_4 *lp_spectrum_l, 
			       int_2 lp_ord_l, int_2 freq_ord_l);

#endif