Added source code to the hrml documentation

[u/mrichter/AliRoot.git] / HLT / PHOS / AliHLTPHOSAnalyzerPeakFinder.cxx

/**************************************************************************
 * Copyright(c) 2006, ALICE Experiment at CERN, All rights reserved.      *
 *                                                                        *
 * Author: Per Thomas Hille for the ALICE HLT Project.                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

#include "AliHLTPHOSAnalyzerPeakFinder.h"
#include <iostream>

using std::cout;
using std::endl;

ClassImp(AliHLTPHOSAnalyzerPeakFinder) 


AliHLTPHOSAnalyzerPeakFinder::AliHLTPHOSAnalyzerPeakFinder(const AliHLTPHOSAnalyzerPeakFinder&):AliHLTPHOSAnalyzer(),tVector(0), aVector(0)
{

}


/**
 * The AliHLTPHOSPeakfinder class is the class for extracting the basic signal parameters
 * "timing" and "energy" from the PHOS raw data. Physical data will for a given readout channel be
 * a sequense of ADC digitized 10 bit integer values, however for performance reasons all values used in
 * calculation is of type double.
 **/
AliHLTPHOSAnalyzerPeakFinder::AliHLTPHOSAnalyzerPeakFinder():AliHLTPHOSAnalyzer(),tVector(0), aVector(0) 
{
  cout <<"You cannot invoke the Fitter without arguments"<<endl;;
}



AliHLTPHOSAnalyzerPeakFinder::~AliHLTPHOSAnalyzerPeakFinder()
{

} //end AliHLTPHOSAnalyzerPeakFinder

void 
AliHLTPHOSAnalyzerPeakFinder::SetTVector(double *tVec)
{
  tVector = tVec;
}

void
AliHLTPHOSAnalyzerPeakFinder::SetAVector(double *aVec)
{
  aVector = aVec;

}

/**
* Extraction of timing and energy using the Peakfinde Algorithm.
* The. The parameters "start" and "length" defines a sub array  of the data array
* that will be used for the the fit. If start+length must not exeed the total length
* of the Data array. "start" must be chosen as close as possible to t0.
* The baseline must also be subtracted.
* The length of "tVector" and "aVector" mus be equal to length.
* "index + length" must not exeed the length of the data array set in the constructor.
* @param start the start index of the subarray of the data array. 
* @param length the number of samples to use starting from index 
* @param tVector the peakfinder vector for timing
* @param aVector the peakfinder vector for amplitude (energy)
**/
void 
AliHLTPHOSAnalyzerPeakFinder::Evaluate(int start, int length)
{
  fDTof = 0;
  fDAmpl = 0;

  if(tVector == 0 || aVector == 0)
    {
      printf("\nError: the peakfinder vectors are not specified, aborting !!!\n");
    }
  else
    {

      printf("\nstart = %d, length = %d\n", start, length);   
      double tmpTime[1008];
      
      for(int i=0; i < length; i++)
	{  
	  fDAmpl += aVector[i]*fFloatDataPtr[i];    
	}
  
      for(int i=0; i < length; i++)
	{   
	  tmpTime[i] = tVector[i]*fFloatDataPtr[i];
	  fDTof = fDTof + tmpTime[i]; 
	}

      fDTof = fDTof/fDAmpl;
    }
  //thats all 
} //end FitPeakFinder