/**************************************************************************/
/*                            File: hmm_matrix.h                          */
/**************************************************************************/
/* Project: Continuous Speech Recognition Search Algorithms               */
/* Author: Neeraj Deshmukh, Aravind Ganapathiraju                         */
/* Class: EE 8993 Spring 1996                        Date: March 12, 1996 */
/**************************************************************************/

/*========================================================================
  This file declares the HMM state matrix class that models the various 
  mean and covariances vectors for the EE 8993 speech recognizer
  ========================================================================*/

/*------------------------------------------------------------------------
  make sure definitions are only made once
  ------------------------------------------------------------------------*/
#ifndef __ISIP_HMM_MATRIX
#define __ISIP_HMM_MATRIX

/*------------------------------------------------------------------------
  system and ISIP include files
  ------------------------------------------------------------------------*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <math.h>
#include <math/integral/integral.h>

/*------------------------------------------------------------------------
  definition of global data types
  ------------------------------------------------------------------------*/
typedef enum _bool {FALSE, TRUE} BOOL;
typedef char *String;

/*=========================================================================
  class HMM_Matrix
  class declarations for universal matrix class
  ========================================================================*/
class HMM_Matrix {
  
  // members
  //
private:

  float_4        **element;
  int_2            numRows;
  int_2         numColumns;
  
  // methods
  //
public:

  /*----------------------------
    constructors and destructor
    ---------------------------*/
  HMM_Matrix (int_2 nRows_l = 1, int_2 nColumns_l = 1, float_4 dval_l = 0);
  HMM_Matrix (int_2 nRows_l = 1, int_2 nColumns_l = 1, float_4 *dval_l = NULL);
  HMM_Matrix (int_2 nRows_l = 1, int_2 nColumns_l = 1, float_4 **dval_l = NULL);
  HMM_Matrix (const HMM_Matrix &umat_l); 
  ~HMM_Matrix ();                   
  
  /*------------------------
    matrix operation methods
    ------------------------*/
  HMM_Matrix & operator = (const HMM_Matrix &umat_l);
  
  // addition of two matrices
  //
  HMM_Matrix operator + (const HMM_Matrix &umat_l);
  
  // product
  //
  // scalar product
  HMM_Matrix operator * (float_4 dd_l);
  // matrix product
  HMM_Matrix operator * (const HMM_Matrix &umat_l);

  // transpose
  //
  HMM_Matrix transpose_matrix_cc ();

  // indexing
  //
  float_4 get_element_cc (int_2 nR_l, int_2 nC_l);
  void    set_element_cc (int_2 nR_l, int_2 nC_l, float_4 value_l);
  int_2   get_num_rows_cc ();
  int_2   get_num_columns_cc ();

  // dump the matrix to stdout
  //
  void print_matrix_cc ();
};

#endif