ctoolbox.cpp

/***************************************************************************
                          ctoolbox.cpp  -  description                              
                             -------------------                                         
    begin                : Wed Aug 4 1999                                           
    copyright            : (C) 1999 by Thorsten Janke                         
    email                : janke@studST.fh-muenster.de                                     
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   * 
 *                                                                         *
 ***************************************************************************/


#include "ctoolbox.h"

CToolBox::CToolBox()
{
}


CToolBox::~CToolBox()
{
}

// CToolBox::filter_tp( char... )
// filter_tp chSrc to chDest with nSize and
// feedback coefficient fC2
void CToolBox::filter_tp( char* chDest, char* chSrc, int nSize)
{
	int nRun;
	unsigned char fData;;
	unsigned char fFilterData;
	for ( nRun= 0; nRun< nSize; nRun++ ) 
	{
		fData = (unsigned char) chSrc[nRun];
		fFilterData = (unsigned char) chDest[nRun];
		fFilterData = (fData >> 1)
			+ (fFilterData>>1);
		chDest[nRun] = (int)fFilterData;			
	}
}

//	returns average of chSrc with size nSize  
int CToolBox::getAverage( char* chSrc, int nSize )
{
  float fSum = 0;

  for( int i=0; i< nSize; i++ )
    fSum += chSrc[i];
  fSum = fSum / (nSize) ;
  return (int)fSum;
}

// filter one byte 
void CToolBox::filter_tp( char* chDest, char* chSrc)
{
   unsigned char fData = (unsigned char) *chSrc;
   unsigned char fFilterData = (unsigned char) *chDest;
   fFilterData = (fData >> 1)
               + (fFilterData>>1);
   *chDest = fFilterData;			
}