//*-- Author :    Damir Buskulic   13/07/00

//////////////////////////////////////////////////////////////////////////
//                                                                      //
// VGroupInfo                                                           //
//                                                                      //
// Information on a group of frames.                                    //
// A group of frames is defined as a set of frames that follow          //
// each other in time, without any "holes" or spaces. It is much easier //
// and faster to search for information in that case.                   //
//                                                                      //
//////////////////////////////////////////////////////////////////////////

#include "VGroupInfo.h"

ClassImp(VGroupInfo)

//______________________________________________________________________________
VGroupInfo::VGroupInfo() : TObject()
{
//   Group info default constructor
   
   mFirstIndex = 0;
   mLastIndex = 0;
   mBeginTime = 0;
   mEndTime = 0;
   mAverageLength = 0;
}

//______________________________________________________________________________
VGroupInfo::VGroupInfo(Int_t firstIndex, Int_t lastIndex, Double_t beginTime,
              Double_t endTime, Float_t averageLength) : TObject()
{
//   Group info constructor
   
   mFirstIndex = firstIndex;
   mLastIndex = lastIndex;
   mBeginTime = beginTime;
   mEndTime = endTime;
   mAverageLength = averageLength;
}

//______________________________________________________________________________
 void VGroupInfo::Copy(TObject& obj)
{
//   Copy this into obj
   
   TObject::Copy(obj);
   ((VGroupInfo&)obj).mFirstIndex = mFirstIndex;
   ((VGroupInfo&)obj).mLastIndex = mLastIndex;
   ((VGroupInfo&)obj).mBeginTime = mBeginTime;
   ((VGroupInfo&)obj).mEndTime = mEndTime;
   ((VGroupInfo&)obj).mAverageLength = mAverageLength;
}

//______________________________________________________________________________
 void VGroupInfo::Increment(Double_t endtime, Double_t length)
{
// Increments and updates the group information
// Recalculates the average length of frames
   
   if (mBeginTime!=0 || mEndTime !=0) {
      mAverageLength = (length+(mLastIndex-mFirstIndex+1)*mAverageLength)/(mLastIndex-mFirstIndex+2);
      mLastIndex++;
   } else {
      mAverageLength = length;
   }
   mEndTime = endtime;
}

//______________________________________________________________________________
 void VGroupInfo::Reset()
{
// Resets the group info.
   
   mFirstIndex = 0;
   mLastIndex = 0;
   mBeginTime = 0;
   mEndTime = 0;
   mAverageLength = 0;
}

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