Bug in rec from digits corrected

[u/mrichter/AliRoot.git] / ZDC / AliZDC.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line 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.                  *
 **************************************************************************/

/* $Id$ */

///////////////////////////////////////////////////////////////////////////////
//                                                                           //
//  			Zero Degree Calorimeter			             //
//  	     This class contains the basic functions for the ZDCs;           //
//            functions specific to one particular geometry are              //
//                      contained in the derived classes                     //
//                                                                           //
///////////////////////////////////////////////////////////////////////////////

// --- ROOT system
#include <TBRIK.h>
#include <TClonesArray.h>
#include <TGeometry.h>
#include <TNode.h>
#include <TTree.h>
#include <TFile.h>
#include <TSystem.h>
#include <TRandom.h>

// --- AliRoot header files
#include "AliDetector.h"
#include "AliRawDataHeader.h"
#include "AliRawReader.h"
#include "AliLoader.h"
#include "AliRun.h"
#include "AliMC.h"
#include "AliLog.h"
#include "AliDAQ.h"
#include "AliZDC.h"
#include "AliZDCHit.h"
#include "AliZDCSDigit.h"
#include "AliZDCDigit.h"
#include "AliZDCDigitizer.h"
#include "AliZDCRawStream.h"
#include "AliZDCCalibData.h"
#include "AliFstream.h"

 
ClassImp(AliZDC)

AliZDC *gAliZDC;
 
//_____________________________________________________________________________
AliZDC::AliZDC() :
  AliDetector(),
  fNoShower  (0),
  fCalibData (0)

{
  //
  // Default constructor for the Zero Degree Calorimeter base class
  //
  
  fIshunt = 1;
  fNhits  = 0;
  fHits = 0;
  fDigits = 0;
  fNdigits = 0;
  
}
 
//_____________________________________________________________________________
AliZDC::AliZDC(const char *name, const char *title) : 
  AliDetector(name,title),
  fNoShower  (0),
  fCalibData (0)
		 
{
  //
  // Standard constructor for the Zero Degree Calorimeter base class
  //
    
  fIshunt = 1;
  fNhits  = 0;
  fDigits = 0;
  fNdigits = 0;
 
  fHits = new TClonesArray("AliZDCHit",1000);
  gAlice->GetMCApp()->AddHitList(fHits);
  
  char sensname[5],senstitle[25];
  sprintf(sensname,"ZDC");
  sprintf(senstitle,"ZDC dummy");
  SetName(sensname); SetTitle(senstitle);

  gAliZDC = this;

}

//____________________________________________________________________________ 
AliZDC::~AliZDC()
{
  //
  // ZDC destructor
  //

  fIshunt = 0;
  gAliZDC = 0;

  delete fCalibData;

}

//_____________________________________________________________________________
AliZDC::AliZDC(const AliZDC& ZDC) :
  AliDetector("ZDC","ZDC")
{
  // copy constructor
    fNoShower = ZDC.fNoShower;
    fCalibData = ZDC.fCalibData;
    fZDCCalibFName = ZDC.fZDCCalibFName;
}

//_____________________________________________________________________________
AliZDC& AliZDC::operator=(const AliZDC& ZDC)
{
  // assignement operator
  if(this!=&ZDC){
    fNoShower = ZDC.fNoShower;
    fCalibData = ZDC.fCalibData;
    fZDCCalibFName = ZDC.fZDCCalibFName;
  } return *this;
}

//_____________________________________________________________________________
void AliZDC::AddHit(Int_t track, Int_t *vol, Float_t *hits)
{
  //
  // 		Add a ZDC hit to the hit list.
  // -> We make use of 2 array of hits:
  // [1]  fHits (the usual one) that contains hits for each PRIMARY
  // [2]  fStHits that contains hits for each EVENT and is used to
  //	  obtain digits at the end of each event
  //
  
  static Float_t primKinEn, xImpact, yImpact, sFlag;

  AliZDCHit *newquad, *curprimquad;
  newquad = new AliZDCHit(fIshunt, track, vol, hits);
  TClonesArray &lhits = *fHits;
  
  if(fNhits==0){
      // First hit -> setting flag for primary or secondary particle
      Int_t primary = gAlice->GetMCApp()->GetPrimary(track);     
      if(track != primary){
        newquad->SetSFlag(1);  // SECONDARY particle entering the ZDC
      }
      else if(track == primary){
        newquad->SetSFlag(0);  // PRIMARY particle entering the ZDC
      }  
      sFlag 	= newquad->GetSFlag();
      primKinEn = newquad->GetPrimKinEn();
      xImpact 	= newquad->GetXImpact();
      yImpact 	= newquad->GetYImpact();
   }
   else{       
      newquad->SetPrimKinEn(primKinEn);
      newquad->SetXImpact(xImpact);
      newquad->SetYImpact(yImpact);
      newquad->SetSFlag(sFlag);
   }
 
  Int_t j;
  for(j=0; j<fNhits; j++){
    // If hits are equal (same track, same volume), sum them.
     curprimquad = (AliZDCHit*) lhits[j];
     if(*curprimquad == *newquad){
        *curprimquad = *curprimquad+*newquad;
        // CH. debug
        /*if(newquad->GetEnergy() != 0. || newquad->GetLightPMC() != 0. || 
	   newquad->GetLightPMQ() != 0.){
	  printf("\n\t --- Equal hits found\n");
	  curprimquad->Print("");
	  newquad->Print("");
          printf("\t --- Det. %d, Quad. %d: X = %f, E = %f, LightPMC = %f, LightPMQ = %f\n",
          curprimquad->GetVolume(0),curprimquad->GetVolume(1),curprimquad->GetXImpact(),
          curprimquad->GetEnergy(), curprimquad->GetLightPMC(), curprimquad->GetLightPMQ());
	}*/
	//
	delete newquad;
	return;
     } 
  }

    //Otherwise create a new hit
    new(lhits[fNhits]) AliZDCHit(*newquad);
    fNhits++;
    // CH. debug
    /*printf("\n\t New ZDC hit added! fNhits = %d\n", fNhits);
    printf("\t Det. %d, Quad.t %d: X = %f, E = %f, LightPMC = %f, LightPMQ = %f\n",
    newquad->GetVolume(0),newquad->GetVolume(1),newquad->GetXImpact(),
    newquad->GetEnergy(), newquad->GetLightPMC(), newquad->GetLightPMQ());
    */
    delete newquad;
}

//_____________________________________________________________________________
void AliZDC::BuildGeometry()
{
  //
  // Build the ROOT TNode geometry for event display 
  // in the Zero Degree Calorimeter
  // This routine is dummy for the moment
  //

  TNode *node, *top;
  TBRIK *brik;
  const int kColorZDC  = kBlue;
  
  //
  top=gAlice->GetGeometry()->GetNode("alice");
  
  // ZDC
    brik = new TBRIK("S_ZDC","ZDC box","void",300,300,5);
    top->cd();
    node = new TNode("ZDC","ZDC","S_ZDC",0,0,600,"");
    node->SetLineColor(kColorZDC);
    fNodes->Add(node);
}

//____________________________________________________________________________
Float_t AliZDC::ZMin(void) const
{
  // Minimum dimension of the ZDC module in z
  return -11600.;
}

//____________________________________________________________________________
Float_t AliZDC::ZMax(void) const
{
  // Maximum dimension of the ZDC module in z
  return -11750.;
}
  

//_____________________________________________________________________________
void AliZDC::MakeBranch(Option_t *opt)
{
  //
  // Create Tree branches for the ZDC
  //

  char branchname[10];
  sprintf(branchname,"%s",GetName());

  const char *cH = strstr(opt,"H");
  
  if(cH && fLoader->TreeH())
   fHits   = new TClonesArray("AliZDCHit",1000); 
  
  AliDetector::MakeBranch(opt);
}

//_____________________________________________________________________________
void AliZDC::Hits2SDigits()
{
  // Create summable digits from hits
  
  AliDebug(1,"\n	Entering AliZDC::Hits2Digits() ");
  
  fLoader->LoadHits("read");
  fLoader->LoadSDigits("recreate");
  AliRunLoader* runLoader = fLoader->GetRunLoader();
  AliZDCSDigit sdigit;
  AliZDCSDigit* psdigit = &sdigit;

  // Event loop
  for(Int_t iEvent = 0; iEvent < runLoader->GetNumberOfEvents(); iEvent++) {
    Float_t pmCZN = 0, pmCZP = 0, pmQZN[4], pmQZP[4], pmZEM1 = 0, pmZEM2 = 0;
    for(Int_t i = 0; i < 4; i++) pmQZN[i] = pmQZP[i] = 0;

    runLoader->GetEvent(iEvent);
    TTree* treeH = fLoader->TreeH();
    Int_t ntracks = (Int_t) treeH->GetEntries();
    ResetHits();

    // Tracks loop
    Int_t sector[2];
    for(Int_t itrack = 0; itrack < ntracks; itrack++) {
      treeH->GetEntry(itrack);
      for(AliZDCHit* zdcHit = (AliZDCHit*)FirstHit(-1); zdcHit;
                      zdcHit = (AliZDCHit*)NextHit()) { 
		      
	sector[0] = zdcHit->GetVolume(0);
	sector[1] = zdcHit->GetVolume(1);
	if((sector[1] < 1) || (sector[1] > 4)) {
	  Error("Hits2SDigits", "sector[0] = %d, sector[1] = %d", 
		sector[0], sector[1]);
	  continue;
	}
	Float_t lightQ = zdcHit->GetLightPMQ();
	Float_t lightC = zdcHit->GetLightPMC();
     
	if(sector[0] == 1) {          //ZN 
	  pmCZN += lightC;
	  pmQZN[sector[1]-1] += lightQ;
	} else if(sector[0] == 2) {   //ZP 
	  pmCZP += lightC;
	  pmQZP[sector[1]-1] += lightQ;
	} else if(sector[0] == 3) {   //ZEM 
	  if(sector[1] == 1) pmZEM1 += lightC;
	  else                pmZEM2 += lightQ;
	}
      }//Hits loop
    }

    // create the output tree
    fLoader->MakeTree("S");
    TTree* treeS = fLoader->TreeS();
    const Int_t kBufferSize = 4000;
    treeS->Branch(GetName(), "AliZDCSDigit", &psdigit, kBufferSize);

    // Create sdigits for ZN1
    sector[0] = 1; // Detector = ZN1
    sector[1] = 0; // Common PM ADC
    new(psdigit) AliZDCSDigit(sector, pmCZN);
    if(pmCZN > 0) treeS->Fill();
    for(Int_t j = 0; j < 4; j++) {
      sector[1] = j+1; // Towers PM ADCs
      new(psdigit) AliZDCSDigit(sector, pmQZN[j]);
      if(pmQZN[j] > 0) treeS->Fill();
    }
  
    // Create sdigits for ZP1
    sector[0] = 2; // Detector = ZP1
    sector[1] = 0; // Common PM ADC
    new(psdigit) AliZDCSDigit(sector, pmCZP);
    if(pmCZP > 0) treeS->Fill();
    for(Int_t j = 0; j < 4; j++) {
      sector[1] = j+1; // Towers PM ADCs
      new(psdigit) AliZDCSDigit(sector, pmQZP[j]);
      if(pmQZP[j] > 0) treeS->Fill();
    }

    // Create sdigits for ZEM
    sector[0] = 3; 
    sector[1] = 1; // Detector = ZEM1
    new(psdigit) AliZDCSDigit(sector, pmZEM1);
    if(pmZEM1 > 0) treeS->Fill();
    sector[1] = 2; // Detector = ZEM2
    new(psdigit) AliZDCSDigit(sector, pmZEM2);
    if(pmZEM2 > 0) treeS->Fill();

    // write the output tree
    fLoader->WriteSDigits("OVERWRITE");
  }

  fLoader->UnloadHits();
  fLoader->UnloadSDigits();
}

//_____________________________________________________________________________
AliDigitizer* AliZDC::CreateDigitizer(AliRunDigitizer* manager) const
{
  // Create the digitizer for ZDC

  return new AliZDCDigitizer(manager);
}

//_____________________________________________________________________________
void AliZDC::Digits2Raw()
{
  // Convert ZDC digits to raw data

  // Format: 22 interger values -> ZN1 (C+Q1-4), ZP1 (C+Q1-4), ZEM1, 2, ZN (C+Q1-4), ZP2 (C+Q1-4))
  // 	     + 22 interger values for the out of time channels
  // For the CAEN module V965 we have an Header, the Data Words and an End Of Block
  // 	12 channels x 2 gain chains read from 1st ADC module
  // 	10 channels x 2 gain chains read from 2nd ADC module
  // 	12 channels x 2 gain chains read from 3rd ADC module (o.o.t.)
  // 	10 channels x 2 gain chains read from 4rth ADC module (o.o.t.)
  //
  const int knADCData1=24, knADCData2=20; 
  UInt_t lADCHeader1; 
  UInt_t lADCData1[knADCData1];
  //
  UInt_t lADCHeader2; 
  UInt_t lADCData2[knADCData2];
  //
  UInt_t lADCHeader3; 
  UInt_t lADCData3[knADCData1];
  //
  UInt_t lADCHeader4; 
  UInt_t lADCData4[knADCData2];
  //
  UInt_t lADCEndBlock;

  // load the digits
  fLoader->LoadDigits("read");
  AliZDCDigit digit;
  AliZDCDigit* pdigit = &digit;
  TTree* treeD = fLoader->TreeD();
  if(!treeD) return;
  treeD->SetBranchAddress("ZDC", &pdigit);
  //printf("\t AliZDC::Digits2raw -> TreeD has %d entries\n",(Int_t) treeD->GetEntries());

  // Fill data array
  // ADC header
  UInt_t lADCHeaderGEO = 0;
  UInt_t lADCHeaderCRATE = 0;
  UInt_t lADCHeaderCNT1 = knADCData1;
  UInt_t lADCHeaderCNT2 = knADCData2;
    
  lADCHeader1 = lADCHeaderGEO << 27 | 0x1 << 25 | lADCHeaderCRATE << 16 |
               lADCHeaderCNT1 << 8 ;
  //	       
  lADCHeader2 = lADCHeaderGEO << 27 | 0x1 << 25 | lADCHeaderCRATE << 16 |
               lADCHeaderCNT2 << 8 ;
  //	       
  lADCHeader3 = lADCHeaderGEO << 27 | 0x1 << 25 | lADCHeaderCRATE << 16 |
               lADCHeaderCNT1 << 8 ;
  //	       
  lADCHeader4 = lADCHeaderGEO << 27 | 0x1 << 25 | lADCHeaderCRATE << 16 |
               lADCHeaderCNT2 << 8 ;
  //printf("\t lADCHeader1 = %x, lADCHeader2 = %x\n",lADCHeader1, lADCHeader2);
      
  // ADC data word
  UInt_t lADCDataGEO = lADCHeaderGEO;
  UInt_t lADCDataValue1[knADCData1];
  UInt_t lADCDataValue2[knADCData2];
  UInt_t lADCDataValue3[knADCData1];
  UInt_t lADCDataValue4[knADCData2];
  UInt_t lADCDataOvFlw1[knADCData1];
  UInt_t lADCDataOvFlw2[knADCData2];
  UInt_t lADCDataOvFlw3[knADCData1];
  UInt_t lADCDataOvFlw4[knADCData2];
  for(Int_t i=0; i<knADCData1 ; i++){
    lADCDataValue1[i] = 0;
    lADCDataOvFlw1[i] = 0;
    lADCDataValue3[i] = 0;
    lADCDataOvFlw3[i] = 0;
  }
  for(Int_t i=0; i<knADCData2 ; i++){
    lADCDataValue2[i] = 0;
    lADCDataOvFlw2[i] = 0;
    lADCDataValue4[i] = 0;
    lADCDataOvFlw4[i] = 0;
  }
  UInt_t lADCDataChannel = 0;
  
  // loop over digits
  for(Int_t iDigit=0; iDigit<treeD->GetEntries(); iDigit++){
    treeD->GetEntry(iDigit);
    if(!pdigit) continue;
    //digit.Print("");
    
    // *** ADC data
    Int_t index1=0, index2=0;
    // *** ADC1 (ZN1, ZP1, ZEM1,2) o ADC3 (ZN1, ZP1, ZEM1,2 o.o.t.)
    if(digit.GetSector(0)==1 || digit.GetSector(0)==2 || digit.GetSector(0)==3){
      if(digit.GetSector(0)==1 || digit.GetSector(0)==2){
        index1 = (digit.GetSector(0)-1) + digit.GetSector(1)*4; // ZN1 or ZP1
        lADCDataChannel = (digit.GetSector(0)-1)*8 + digit.GetSector(1);
      }
      else if(digit.GetSector(0)==3){ // ZEM 1,2
        index1 = 20 + (digit.GetSector(1)-1);
        lADCDataChannel = 5 + (digit.GetSector(1)-1)*8;
      }
      //
      /*printf("\t AliZDC::Digits2raw -> det %d, quad %d, index = %d, ADCch = %d\n",
		digit.GetSector(0),digit.GetSector(1),index1,lADCDataChannel);// Ch. debug
      */
      //
      if(iDigit<22){
        lADCDataValue1[index1] = digit.GetADCValue(0); 	// High gain ADC ch.	
        if(lADCDataValue1[index1] > 2047) lADCDataOvFlw1[index1] = 1; 
        lADCDataValue1[index1+2] = digit.GetADCValue(1); // Low gain ADC ch.
        if(lADCDataValue1[index1+2] > 2047) lADCDataOvFlw1[index1+2] = 1; 
    
        lADCData1[index1] = lADCDataGEO << 27 | lADCDataChannel << 17 | 
                        lADCDataOvFlw1[index1] << 12 | (lADCDataValue1[index1] & 0xfff); 
        lADCData1[index1+2] = lADCDataGEO << 27 | lADCDataChannel << 17 | 0x1 << 16 |
                        lADCDataOvFlw1[index1+2] << 12 | (lADCDataValue1[index1+2] & 0xfff);  
      }
      else{
        lADCDataValue3[index1] = digit.GetADCValue(0); 	// High gain ADC ch.	
        if(lADCDataValue3[index1] > 2047) lADCDataOvFlw3[index1] = 1; 
        lADCDataValue3[index1+2] = digit.GetADCValue(1); // Low gain ADC ch.
        if(lADCDataValue3[index1+2] > 2047) lADCDataOvFlw3[index1+2] = 1; 
    
        lADCData3[index1] = lADCDataGEO << 27 | lADCDataChannel << 17 | 
                        lADCDataOvFlw3[index1] << 12 | (lADCDataValue3[index1] & 0xfff); 
        lADCData3[index1+2] = lADCDataGEO << 27 | lADCDataChannel << 17 | 0x1 << 16 |
                        lADCDataOvFlw3[index1+2] << 12 | (lADCDataValue3[index1+2] & 0xfff);  
      }                  
    }
    // *** ADC2 (ZN2, ZP2) o ADC4 (ZN2, ZP2 o.o.t.)
    else if(digit.GetSector(0)==4 || digit.GetSector(0)==5){
      index2 = (digit.GetSector(0)-4) + digit.GetSector(1)*4; // ZN2 or ZP2
      lADCDataChannel = (digit.GetSector(0)-4)*8 + digit.GetSector(1);
      //
      /*printf("\t AliZDC::Digits2raw -> det %d, quad %d, index = %d, ADCch = %d\n",
		digit.GetSector(0),digit.GetSector(1),index1,lADCDataChannel); // Ch. debug
      */
      //
      if(iDigit<22){
        lADCDataValue2[index2] = digit.GetADCValue(0);
        if(lADCDataValue2[index2] > 2047) lADCDataOvFlw2[index2] = 1; 
        lADCDataValue2[index2+2] = digit.GetADCValue(1);
        if(lADCDataValue2[index2+2] > 2047) lADCDataOvFlw2[index2+2] = 1; 
        //
        lADCData2[index2] =   lADCDataGEO << 27 | lADCDataChannel << 17 | 
                        lADCDataOvFlw2[index2] << 12 | (lADCDataValue2[index2] & 0xfff); 
        lADCData2[index2+2] = lADCDataGEO << 27 | lADCDataChannel << 17 | 0x1 << 16 |
                        lADCDataOvFlw2[index2+2] << 12 | (lADCDataValue2[index2+2] & 0xfff);   
      }                 
      else{
        lADCDataValue4[index2] = digit.GetADCValue(0);
        if(lADCDataValue4[index2] > 2047) lADCDataOvFlw4[index2] = 1; 
        lADCDataValue4[index2+2] = digit.GetADCValue(1);
        if(lADCDataValue4[index2+2] > 2047) lADCDataOvFlw4[index2+2] = 1; 
        //
        lADCData4[index2] =   lADCDataGEO << 27 | lADCDataChannel << 17 | 
                        lADCDataOvFlw4[index2] << 12 | (lADCDataValue4[index2] & 0xfff); 
        lADCData4[index2+2] = lADCDataGEO << 27 | lADCDataChannel << 17 | 0x1 << 16 |
                        lADCDataOvFlw4[index2+2] << 12 | (lADCDataValue4[index2+2] & 0xfff);   
      }                 
    } 
    if((index1<0) || (index1>23)) {
      Error("Digits2Raw", "sector[0] = %d, sector[1] = %d", 
	    digit.GetSector(0), digit.GetSector(1));
      continue;
    }
    if((index2<0) || (index2>19)) {
      Error("Digits2Raw", "sector[0] = %d, sector[1] = %d", 
	    digit.GetSector(0), digit.GetSector(1));
      continue;
    }
    
    
  }
  /*  for(Int_t i=0;i<24;i++) printf("\t ADCData1[%d] = %x\n",i,lADCData1[i]);
  for(Int_t i=0;i<20;i++) printf("\t ADCData2[%d] = %x\n",i,lADCData2[i]);
  for(Int_t i=0;i<24;i++) printf("\t ADCData3[%d] = %x\n",i,lADCData3[i]);
  for(Int_t i=0;i<20;i++) printf("\t ADCData4[%d] = %x\n",i,lADCData4[i]);
  */
 
  // End of Block
  UInt_t lADCEndBlockGEO = lADCHeaderGEO;
  UInt_t lADCEndBlockEvCount = gAlice->GetEventNrInRun();
  
  lADCEndBlock = lADCEndBlockGEO << 27 | 0x1 << 26 | lADCEndBlockEvCount;
  
  //printf("\t ADCEndBlock = %d\n",lADCEndBlock);


  // open the output file
  char fileName[30];
  strcpy(fileName,AliDAQ::DdlFileName("ZDC",0));

  AliFstream* file = new AliFstream(fileName);

  // write the DDL data header
  AliRawDataHeader header;
  header.fSize = sizeof(header) + 
                 sizeof(lADCHeader1) + sizeof(lADCData1) + sizeof(lADCEndBlock) +
  		 sizeof(lADCHeader2) + sizeof(lADCData2) + sizeof(lADCEndBlock) +
                 sizeof(lADCHeader3) + sizeof(lADCData3) + sizeof(lADCEndBlock) +
  		 sizeof(lADCHeader4) + sizeof(lADCData4) + sizeof(lADCEndBlock);
  /*printf("sizeof header = %d, ADCHeader1 = %d, ADCData1 = %d, ADCEndBlock = %d\n",
          sizeof(header),sizeof(lADCHeader1),sizeof(lADCData1),sizeof(lADCEndBlock));
  printf("sizeof header = %d, ADCHeader2 = %d, ADCData2 = %d, ADCEndBlock = %d\n",
          sizeof(header),sizeof(lADCHeader2),sizeof(lADCData2),sizeof(lADCEndBlock));*/
  header.SetAttribute(0);  // valid data
  file->WriteBuffer((char*)(&header), sizeof(header));

  // write the raw data and close the file
  file->WriteBuffer((char*) &lADCHeader1, sizeof (lADCHeader1));
  file->WriteBuffer((char*)(lADCData1), sizeof(lADCData1));
  file->WriteBuffer((char*) &lADCEndBlock, sizeof(lADCEndBlock));
  file->WriteBuffer((char*) &lADCHeader2, sizeof (lADCHeader2));
  file->WriteBuffer((char*)(lADCData2), sizeof(lADCData2));
  file->WriteBuffer((char*) &lADCEndBlock, sizeof(lADCEndBlock));
  file->WriteBuffer((char*) &lADCHeader3, sizeof (lADCHeader3));
  file->WriteBuffer((char*)(lADCData3), sizeof(lADCData3));
  file->WriteBuffer((char*) &lADCEndBlock, sizeof(lADCEndBlock));
  file->WriteBuffer((char*) &lADCHeader4, sizeof (lADCHeader4));
  file->WriteBuffer((char*)(lADCData4), sizeof(lADCData4));
  file->WriteBuffer((char*) &lADCEndBlock, sizeof(lADCEndBlock));
  delete file;

  // unload the digits
  fLoader->UnloadDigits();
}

//_____________________________________________________________________________
Bool_t AliZDC::Raw2SDigits(AliRawReader* rawReader)
{
  // Convert ZDC raw data to Sdigits
  
  AliLoader* loader = (gAlice->GetRunLoader())->GetLoader("ZDCLoader");
  if(!loader) {
    AliError("no ZDC loader found");
    return kFALSE;
  }

//  // Event loop
  Int_t iEvent = 0;
  while(rawReader->NextEvent()){
    (gAlice->GetRunLoader())->GetEvent(iEvent++);
    // Create the output digit tree
    TTree* treeS = loader->TreeS();
    if(!treeS){
      loader->MakeTree("S");
      treeS = loader->TreeS();
    }
    //
    AliZDCSDigit sdigit;
    AliZDCSDigit* psdigit = &sdigit;
    const Int_t kBufferSize = 4000;
    treeS->Branch("ZDC", "AliZDCSDigit",  &psdigit, kBufferSize);
    //
    AliZDCRawStream rawStream(rawReader);
    Int_t sector[2], ADCRes, ADCRaw, ADCPedSub, nPheVal;
    Int_t jcount = 0;
    while(rawStream.Next()){
      if(rawStream.IsADCDataWord()){
        //For the moment only in-time SDigits are foreseen (1st 44 raw values)
        if(jcount < 44){ 
          for(Int_t j=0; j<2; j++) sector[j] = rawStream.GetSector(j);
	  ADCRaw = rawStream.GetADCValue();
	  ADCRes = rawStream.GetADCGain();
	  //printf("\t RAw2SDigits raw%d ->  RawADC[%d, %d, %d] read\n",
	  //	jcount, sector[0], sector[1], ADCRaw);
	  //
	  ADCPedSub = ADCRaw - Pedestal(sector[0], sector[1], ADCRes);
	  if(ADCPedSub<0) ADCPedSub=0;
	  nPheVal = ADCch2Phe(sector[0], sector[1], ADCPedSub, ADCRes);
          //
	  //printf("\t \t ->  SDigit[%d, %d, %d] created\n",
	  //	sector[0], sector[1], nPheVal);
	  //
          new(psdigit) AliZDCSDigit(sector, (Float_t) nPheVal);
          treeS->Fill();
          jcount++;
        }
      }//IsADCDataWord
    }//rawStream.Next
    // write the output tree
    fLoader->WriteSDigits("OVERWRITE");
    fLoader->UnloadSDigits();
  }//Event loop 
   
  return kTRUE;
}

//_____________________________________________________________________________
Int_t AliZDC::Pedestal(Int_t Det, Int_t Quad, Int_t Res) const
{
  // Returns a pedestal for detector det, PM quad, channel with res.
  //
  // Getting calibration object for ZDC set
  AliCDBManager *man = AliCDBManager::Instance();
  man->SetDefaultStorage("local://$ALICE_ROOT");
  man->SetRun(0);
  AliCDBEntry  *entry = man->Get("ZDC/Calib/Data");
  AliZDCCalibData *CalibData = (AliZDCCalibData*) entry->GetObject();
  //
  if(!CalibData){
    printf("\t No calibration object found for ZDC!");
    return -1;
  }
  //
  Float_t PedValue;
  Float_t meanPed, Pedwidth;
  Int_t index=0;
  if(Det==1|| Det==2)	      index = 10*(Det-1)+Quad+5*Res;   // ZN1, ZP1
  else if(Det==3)	      index = 10*(Det-1)+(Quad-1)+Res; // ZEM
  else if(Det==4|| Det==5)    index = 10*(Det-2)+Quad+5*Res+4; // ZN2, ZP2
  //
  //
  meanPed = CalibData->GetMeanPed(index);
  Pedwidth = CalibData->GetMeanPedWidth(index);
  PedValue = gRandom->Gaus(meanPed,Pedwidth);
  //
  //printf("\t AliZDC::Pedestal - det(%d, %d) - Ped[%d] = %d\n",Det, Quad, index,(Int_t) PedValue); // Chiara debugging!
  
  

  return (Int_t) PedValue;
}


//_____________________________________________________________________________
Int_t AliZDC::ADCch2Phe(Int_t Det, Int_t Quad, Int_t ADCVal, Int_t Res) const
{
  // Evaluation of the no. of phe produced
  Float_t PMGain[6][5];
  Float_t ADCRes[2];
  for(Int_t j = 0; j < 5; j++){
    PMGain[0][j] = 50000.;
    PMGain[1][j] = 100000.;
    PMGain[2][j] = 100000.;
    PMGain[3][j] = 50000.;
    PMGain[4][j] = 100000.;
    PMGain[5][j] = 100000.;
  }
  // ADC Caen V965
  ADCRes[0] = 0.0000008; // ADC Resolution high gain: 200 fC/adcCh
  ADCRes[1] = 0.0000064; // ADC Resolution low gain:  25  fC/adcCh
  //
  Int_t nPhe = (Int_t) (ADCVal * PMGain[Det-1][Quad] * ADCRes[Res]);
  //
  //printf("\t AliZDC::ADCch2Phe -> det(%d, %d) - ADC %d  phe %d\n",Det,Quad,ADCVal,nPhe);

  return nPhe;
}

//______________________________________________________________________
void AliZDC::SetTreeAddress(){

  // Set branch address for the Trees.
  if(fLoader->TreeH() && (fHits == 0x0))
    fHits   = new TClonesArray("AliZDCHit",1000);
      
  AliDetector::SetTreeAddress();
}
 
//________________________________________________________________
void AliZDC::CreateCalibData()
{
  // 
  //if(fCalibData) delete fCalibData; // delete previous version
  fCalibData = new AliZDCCalibData(GetName());
}
//________________________________________________________________
void AliZDC::WriteCalibData(Int_t option)
{
  //
  const int kCompressLevel = 9;
  char* fnam = GetZDCCalibFName();
  if(!fnam || fnam[0]=='\0') {
    fnam = gSystem->ExpandPathName("$(ALICE_ROOT)/data/AliZDCCalib.root");
    Warning("WriteCalibData","No File Name is provided, using default %s",fnam);
  }
  TFile* cdfile = TFile::Open(fnam,"UPDATE","",kCompressLevel);

  // Writes Calibration Data to current directory. 
  // User MUST take care of corresponding file opening and ->cd()... !!!
  // By default, the object is overwritten. Use 0 option for opposite.
  if(option) option = TObject::kOverwrite;
  if(fCalibData) fCalibData->Write(0,option);
  else if(fCalibData) fCalibData->Write(0,option);

  cdfile->Close();
  delete cdfile;
}

//________________________________________________________________
void AliZDC::LoadCalibData()
{
  //
  char* fnam = GetZDCCalibFName();
  if(!fnam || fnam[0]=='\0') return; 
  if(!gAlice->IsFileAccessible(fnam)) {
    Error("LoadCalibData","ZDC Calibration Data file is not accessible, %s",fnam);
    exit(1);
  }
  TFile* cdfile = TFile::Open(fnam);

  // Loads Calibration Data from current directory. 
  // User MUST take care of corresponding file opening and ->cd()...!!!
  //
  if(fCalibData) delete fCalibData; // delete previous version
  TString dtname = "Calib_";
  dtname += GetName();
  fCalibData = (AliZDCCalibData*) gDirectory->Get(dtname.Data());
  if(!fCalibData) { 
    Error("LoadCalibData","No Calibration data found for %s",GetName());
    exit(1);
  }

  cdfile->Close();
  delete cdfile;
}