[u/mrichter/AliRoot.git] / EMCAL / AliEMCALRawUtils.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.                  *
 **************************************************************************/

/* $Id$ */
/* History of cvs commits:
 *
 * $Log$ */

//*-- Author: Marco van Leeuwen (LBL)
#include "AliEMCALRawUtils.h"

#include "TF1.h"
#include "TGraph.h"
#include "TSystem.h"

#include "AliLog.h"
#include "AliRunLoader.h"
#include "AliCaloAltroMapping.h"
#include "AliAltroBuffer.h"
#include "AliRawReader.h"
#include "AliCaloRawStream.h"
#include "AliDAQ.h"

#include "AliEMCALLoader.h"
#include "AliEMCALGeometry.h"
#include "AliEMCALDigitizer.h"
#include "AliEMCALDigit.h"


ClassImp(AliEMCALRawUtils)

// Signal shape parameters
Int_t    AliEMCALRawUtils::fgOrder       = 2 ;      // Order of gamma function 
Double_t AliEMCALRawUtils::fgTimeMax     = 2.56E-5 ;  // each sample is over 100 ns fTimeMax/fTimeBins
Double_t AliEMCALRawUtils::fgTau         = 165E-9 ;   // 165 ns (from testbeam; not very accurate)
Double_t AliEMCALRawUtils::fgTimeTrigger = 1.5E-6 ;   // 15 time bins ~ 1.5 musec

// some digitization constants
Int_t    AliEMCALRawUtils::fgThreshold = 1;
Int_t    AliEMCALRawUtils::fgDDLPerSuperModule = 2;  // 2 ddls per SuperModule

AliEMCALRawUtils::AliEMCALRawUtils(): fHighLowGainFactor(0.) {
  fHighLowGainFactor = 16. ;          // adjusted for a low gain range of 82 GeV (10 bits) 
}
//____________________________________________________________________________
AliEMCALRawUtils::~AliEMCALRawUtils() {
}
//____________________________________________________________________________
void AliEMCALRawUtils::Digits2Raw()
{
  // convert digits of the current event to raw data
  
  AliRunLoader *rl = AliRunLoader::GetRunLoader();
  AliEMCALLoader *loader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));

  // get the digits
  loader->LoadDigits("EMCAL");
  loader->GetEvent();
  TClonesArray* digits = loader->Digits() ;
  
  if (!digits) {
    Warning("Digits2Raw", "no digits found !");
    return;
  }
    
  // get the geometry
  AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance();
  if (!geom) {
    AliError(Form("No geometry found !"));
    return;
  }
  
  static const Int_t nDDL = 12*2; // 12 SM hardcoded for now. Buffers allocated dynamically, when needed, so just need an upper limit here
  AliAltroBuffer* buffers[nDDL];
  for (Int_t i=0; i < nDDL; i++)
    buffers[i] = 0;

  Int_t adcValuesLow[fgkTimeBins];
  Int_t adcValuesHigh[fgkTimeBins];

  //Load Mapping RCU files once
  TString path = gSystem->Getenv("ALICE_ROOT");
  path += "/EMCAL/mapping/RCU";
  TString path0 = path+"0.data";//This file will change in future
  TString path1 = path+"1.data";//This file will change in future
  AliAltroMapping * mapping[2] ; // For the moment only 2
  mapping[0] = new AliCaloAltroMapping(path0.Data());
  mapping[1] = new AliCaloAltroMapping(path1.Data());

  // loop over digits (assume ordered digits)
  for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
    AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ;
    if (digit->GetAmp() < fgThreshold) 
      continue;

    //get cell indices
    Int_t nSM = 0;
    Int_t nIphi = 0;
    Int_t nIeta = 0;
    Int_t iphi = 0;
    Int_t ieta = 0;
    Int_t nModule = 0;
    geom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta);
    geom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ;
    
    //Check which is the RCU of the cell.
    Int_t iRCU = -111;
    //RCU0
    if (0<=iphi&&iphi<8) iRCU=0; // first cable row
    else if (8<=iphi&&iphi<16 && 0<=ieta&&ieta<24) iRCU=0; // first half; 
    //second cable row
    //RCU1
    else if(8<=iphi&&iphi<16 && 24<=ieta&&ieta<48) iRCU=1; // second half; 
    //second cable row
    else if(16<=iphi&&iphi<24) iRCU=1; // third cable row
    
    //Which DDL?
    Int_t iDDL = fgDDLPerSuperModule* nSM + iRCU;
    if (iDDL >= nDDL)
      Fatal("Digits2Raw()","Non-existent DDL board number: %d", iDDL);

    if (buffers[iDDL] == 0) {      
      // open new file and write dummy header
      TString fileName = AliDAQ::DdlFileName("EMCAL",iDDL);
      buffers[iDDL] = new AliAltroBuffer(fileName.Data(),mapping[iRCU]);
      buffers[iDDL]->WriteDataHeader(kTRUE, kFALSE);  //Dummy;
    }
    
    // out of time range signal (?)
    if (digit->GetTimeR() > GetRawFormatTimeMax() ) {
      AliInfo("Signal is out of time range.\n");
      buffers[iDDL]->FillBuffer((Int_t)digit->GetAmp());
      buffers[iDDL]->FillBuffer(GetRawFormatTimeBins() );  // time bin
      buffers[iDDL]->FillBuffer(3);          // bunch length      
      buffers[iDDL]->WriteTrailer(3, ieta, iphi, nSM);  // trailer
      // calculate the time response function
    } else {
      Bool_t lowgain = RawSampledResponse(digit->GetTimeR(), digit->GetAmp(), adcValuesHigh, adcValuesLow) ; 
      if (lowgain) 
	buffers[iDDL]->WriteChannel(ieta, iphi, 0, GetRawFormatTimeBins(), adcValuesLow, fgThreshold);
      else 
	buffers[iDDL]->WriteChannel(ieta,iphi, 1, GetRawFormatTimeBins(), adcValuesHigh, fgThreshold);
    }
  }
  
  // write headers and close files
  for (Int_t i=0; i < nDDL; i++) {
    if (buffers[i]) {
      buffers[i]->Flush();
      buffers[i]->WriteDataHeader(kFALSE, kFALSE);
      delete buffers[i];
    }
  }
  mapping[0]->Delete();
  mapping[1]->Delete();
  loader->UnloadDigits();
}

//____________________________________________________________________________
void AliEMCALRawUtils::Raw2Digits(AliRawReader* reader)
{
  // convert raw data of the current event to digits
  AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
  if (!geom) {
    AliError(Form("No geometry found !"));
    return;
  }

  AliRunLoader *rl = AliRunLoader::GetRunLoader();
  AliEMCALLoader *loader = dynamic_cast<AliEMCALLoader*>(rl->GetDetectorLoader("EMCAL"));

  // get the digits
  TClonesArray* digits = loader->Digits() ;
  digits->Clear(); 

  if (!digits) {
    Error("Raw2Digits", "no digits found !");
    return;
  }
  if (!reader) {
    Error("Raw2Digits", "no raw reader found !");
    return;
  }

  // Use AliAltroRawStream to read the ALTRO format.  No need to
  // reinvent the wheel :-) 
  AliCaloRawStream in(reader,"EMCAL");
  // Select EMCAL DDL's;
  reader->Select("EMCAL");

  // reading is from previously existing AliEMCALGetter.cxx
  // ReadRaw method
  TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
  signalF->SetParNames("Charge", "Gain", "Amplitude", "TimeZero"); 
  
  Int_t id =  -1;
  Int_t idigit = 0 ; 
  Double_t time = 0. ; 
  Double_t amp = 0. ; 

  TGraph * gSig = new TGraph(GetRawFormatTimeBins()) ; 

  Int_t eofReached = 0;
  Int_t lowGain = 0;

  in.Next(); // Go to first digit
  do {
    id =  geom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ;
    lowGain = in.IsLowGain();
    gSig->SetPoint(in.GetTime(), 
		   in.GetTime()* GetRawFormatTimeMax() / GetRawFormatTimeBins(), 
		   in.GetSignal()) ;

    Int_t iTime = 1;
    do {
      if (!in.Next())
	eofReached = 1;
      else {
	gSig->SetPoint(in.GetTime(), 
		       in.GetTime()* GetRawFormatTimeMax() / GetRawFormatTimeBins(), 
		       in.GetSignal()) ;
      }
      iTime++;
    } while (!eofReached && !in.IsNewRow() && !in.IsNewColumn() && !in.IsNewModule());

    FitRaw(gSig, signalF, amp, time) ; 
    if (lowGain) 
      amp *= fHighLowGainFactor; 
    
    if (amp > 0) {
      AliDebug(2,Form("id %d amp %g", id, amp));
      new((*digits)[idigit]) AliEMCALDigit( -1, -1, id, (Int_t)amp, time, idigit) ;	
	  idigit++ ; 
    }
    Int_t index ; 
	
    // Reset graph
    for (index = 0; index < GetRawFormatTimeBins(); index++) {
      gSig->SetPoint(index, index * GetRawFormatTimeMax() / GetRawFormatTimeBins(), 0) ;  
    } 
  } while (!eofReached); // EMCAL entries loop
  
  delete signalF ; 
  delete gSig;
  
  return ; 
}

//____________________________________________________________________________ 
void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Double_t & amp, Double_t & time)
{
  // Fits the raw signal time distribution; from AliEMCALGetter 

  const Int_t kNoiseThreshold = 0 ;
  Double_t timezero1 = 0., timezero2 = 0., timemax = 0. ;
  Double_t signal = 0., signalmax = 0. ;       
  amp = time = 0. ; 

  timezero1 = signalmax = timemax = 0. ;
  timezero2 = GetRawFormatTimeMax();
  Int_t index ; 
  for (index = 0; index < GetRawFormatTimeBins(); index++) {
    gSig->GetPoint(index, time, signal) ; 
    if (signal > kNoiseThreshold && timezero1 == 0.) 
      timezero1 = time ;
    if (signal <= kNoiseThreshold && timezero1 > 0. && timezero2 == 0.)
      timezero2 = time ; 
    if (signal > signalmax) {
      signalmax = signal ; 
      timemax   = time ; 
    }
  }

  if ( timemax < GetRawFormatTimeMax() * 0.4 ) { // else its noise 
    signalF->SetParameter(0, signalmax) ; 
    signalF->SetParameter(1, timemax) ; 
    gSig->Fit(signalF, "QRON", "", 0., timezero2); //, "QRON") ; 
    amp = signalF->GetParameter(0) ; 
    time = signalF->GetParameter(1) - fgTimeTrigger;
  }
  return;
}
//__________________________________________________________________
Double_t AliEMCALRawUtils::RawResponseFunction(Double_t *x, Double_t *par)
{
  // Shape of the electronics raw reponse:
  // It is a semi-gaussian, 2nd order Gamma function of the general form
  //
  // t' = (t - t0 + tau) / tau
  // F = A * t**N * exp( N * ( 1 - t) )   for t >= 0
  // F = 0                                for t < 0 
  //
  // parameters:
  // A:   par[0]   // Amplitude = peak value
  // t0:  par[1]
  // tau: fgTau
  // N:   fgOrder
  //
  Double_t signal ;
  Double_t xx = ( x[0] - par[1] + fgTau ) / fgTau ; 

  if (xx < 0) 
    signal = 0. ;  
  else {  
    signal = par[0] * TMath::Power(xx , fgOrder) * TMath::Exp(fgOrder * (1 - xx )) ; 
  }
  return signal ;  
}

//__________________________________________________________________
Bool_t AliEMCALRawUtils::RawSampledResponse(
const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const 
{
  // for a start time dtime and an amplitude damp given by digit, 
  // calculates the raw sampled response AliEMCAL::RawResponseFunction

  const Int_t kRawSignalOverflow = 0x3FF ; 
  Bool_t lowGain = kFALSE ; 

  TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
  signalF.SetParameter(0, damp) ; 
  signalF.SetParameter(1, dtime + fgTimeTrigger) ; 

  for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
    Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
    Double_t signal = signalF.Eval(time) ;     
    adcH[iTime] =  static_cast<Int_t>(signal + 0.5) ;
    if ( adcH[iTime] > kRawSignalOverflow ){  // larger than 10 bits 
      adcH[iTime] = kRawSignalOverflow ;
      lowGain = kTRUE ; 
    }

    signal /= fHighLowGainFactor;

    adcL[iTime] =  static_cast<Int_t>(signal + 0.5) ;
    if ( adcL[iTime] > kRawSignalOverflow)  // larger than 10 bits 
      adcL[iTime] = kRawSignalOverflow ;
  }
  return lowGain ; 
}
Commit	Line	Data
ee299369	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
	16	/* $Id$ */
	17	/* History of cvs commits:
	18	*
	19	* $Log$ */
	20
	21	//*-- Author: Marco van Leeuwen (LBL)
	22	#include "AliEMCALRawUtils.h"
	23
	24	#include "TF1.h"
	25	#include "TGraph.h"
	26	#include "TSystem.h"
	27
	28	#include "AliLog.h"
	29	#include "AliRunLoader.h"
	30	#include "AliCaloAltroMapping.h"
	31	#include "AliAltroBuffer.h"
	32	#include "AliRawReader.h"
	33	#include "AliCaloRawStream.h"
	34	#include "AliDAQ.h"
	35
	36	#include "AliEMCALLoader.h"
	37	#include "AliEMCALGeometry.h"
	38	#include "AliEMCALDigitizer.h"
	39	#include "AliEMCALDigit.h"
	40
	41
	42	ClassImp(AliEMCALRawUtils)
	43
	44	// Signal shape parameters
	45	Int_t AliEMCALRawUtils::fgOrder = 2 ; // Order of gamma function
	46	Double_t AliEMCALRawUtils::fgTimeMax = 2.56E-5 ; // each sample is over 100 ns fTimeMax/fTimeBins
	47	Double_t AliEMCALRawUtils::fgTau = 165E-9 ; // 165 ns (from testbeam; not very accurate)
	48	Double_t AliEMCALRawUtils::fgTimeTrigger = 1.5E-6 ; // 15 time bins ~ 1.5 musec
	49
	50	// some digitization constants
	51	Int_t AliEMCALRawUtils::fgThreshold = 1;
	52	Int_t AliEMCALRawUtils::fgDDLPerSuperModule = 2; // 2 ddls per SuperModule
	53
	54	AliEMCALRawUtils::AliEMCALRawUtils(): fHighLowGainFactor(0.) {
	55	fHighLowGainFactor = 16. ; // adjusted for a low gain range of 82 GeV (10 bits)
	56	}
	57	//____________________________________________________________________________
	58	AliEMCALRawUtils::~AliEMCALRawUtils() {
	59	}
	60	//____________________________________________________________________________
	61	void AliEMCALRawUtils::Digits2Raw()
	62	{
	63	// convert digits of the current event to raw data
	64
65	AliRunLoader *rl = AliRunLoader::GetRunLoader();
66	AliEMCALLoader loader = dynamic_cast<AliEMCALLoader>(rl->GetDetectorLoader("EMCAL"));
67
68	// get the digits
69	loader->LoadDigits("EMCAL");
70	loader->GetEvent();
71	TClonesArray* digits = loader->Digits() ;
72
73	if (!digits) {
74	Warning("Digits2Raw", "no digits found !");
75	return;
76	}
77
78	// get the geometry
79	AliEMCALGeometry* geom = AliEMCALGeometry::GetInstance();
80	if (!geom) {
81	AliError(Form("No geometry found !"));
82	return;
83	}
84
85	static const Int_t nDDL = 12*2; // 12 SM hardcoded for now. Buffers allocated dynamically, when needed, so just need an upper limit here
86	AliAltroBuffer* buffers[nDDL];
87	for (Int_t i=0; i < nDDL; i++)
88	buffers[i] = 0;
89
90	Int_t adcValuesLow[fgkTimeBins];
91	Int_t adcValuesHigh[fgkTimeBins];
92
93	//Load Mapping RCU files once
94	TString path = gSystem->Getenv("ALICE_ROOT");
95	path += "/EMCAL/mapping/RCU";
96	TString path0 = path+"0.data";//This file will change in future
97	TString path1 = path+"1.data";//This file will change in future
98	AliAltroMapping * mapping[2] ; // For the moment only 2
99	mapping[0] = new AliCaloAltroMapping(path0.Data());
100	mapping[1] = new AliCaloAltroMapping(path1.Data());
101
102	// loop over digits (assume ordered digits)
103	for (Int_t iDigit = 0; iDigit < digits->GetEntries(); iDigit++) {
104	AliEMCALDigit* digit = dynamic_cast<AliEMCALDigit *>(digits->At(iDigit)) ;
105	if (digit->GetAmp() < fgThreshold)
106	continue;
107
108	//get cell indices
109	Int_t nSM = 0;
110	Int_t nIphi = 0;
111	Int_t nIeta = 0;
112	Int_t iphi = 0;
113	Int_t ieta = 0;
114	Int_t nModule = 0;
115	geom->GetCellIndex(digit->GetId(), nSM, nModule, nIphi, nIeta);
116	geom->GetCellPhiEtaIndexInSModule(nSM, nModule, nIphi, nIeta,iphi, ieta) ;
117
118	//Check which is the RCU of the cell.
119	Int_t iRCU = -111;
120	//RCU0
121	if (0<=iphi&&iphi<8) iRCU=0; // first cable row
122	else if (8<=iphi&&iphi<16 && 0<=ieta&&ieta<24) iRCU=0; // first half;
123	//second cable row
124	//RCU1
125	else if(8<=iphi&&iphi<16 && 24<=ieta&&ieta<48) iRCU=1; // second half;
126	//second cable row
127	else if(16<=iphi&&iphi<24) iRCU=1; // third cable row
128
129	//Which DDL?
130	Int_t iDDL = fgDDLPerSuperModule* nSM + iRCU;
131	if (iDDL >= nDDL)
132	Fatal("Digits2Raw()","Non-existent DDL board number: %d", iDDL);
133
134	if (buffers[iDDL] == 0) {
135	// open new file and write dummy header
136	TString fileName = AliDAQ::DdlFileName("EMCAL",iDDL);
137	buffers[iDDL] = new AliAltroBuffer(fileName.Data(),mapping[iRCU]);
138	buffers[iDDL]->WriteDataHeader(kTRUE, kFALSE); //Dummy;
139	}
140
141	// out of time range signal (?)
142	if (digit->GetTimeR() > GetRawFormatTimeMax() ) {
143	AliInfo("Signal is out of time range.\n");
144	buffers[iDDL]->FillBuffer((Int_t)digit->GetAmp());
145	buffers[iDDL]->FillBuffer(GetRawFormatTimeBins() ); // time bin
146	buffers[iDDL]->FillBuffer(3); // bunch length
147	buffers[iDDL]->WriteTrailer(3, ieta, iphi, nSM); // trailer
148	// calculate the time response function
149	} else {
150	Bool_t lowgain = RawSampledResponse(digit->GetTimeR(), digit->GetAmp(), adcValuesHigh, adcValuesLow) ;
151	if (lowgain)
152	buffers[iDDL]->WriteChannel(ieta, iphi, 0, GetRawFormatTimeBins(), adcValuesLow, fgThreshold);
153	else
154	buffers[iDDL]->WriteChannel(ieta,iphi, 1, GetRawFormatTimeBins(), adcValuesHigh, fgThreshold);
155	}
156	}
157
158	// write headers and close files
159	for (Int_t i=0; i < nDDL; i++) {
160	if (buffers[i]) {
161	buffers[i]->Flush();
162	buffers[i]->WriteDataHeader(kFALSE, kFALSE);
163	delete buffers[i];
164	}
165	}
166	mapping[0]->Delete();
167	mapping[1]->Delete();
168	loader->UnloadDigits();
169	}
170
171	//____________________________________________________________________________
172	void AliEMCALRawUtils::Raw2Digits(AliRawReader* reader)
173	{
174	// convert raw data of the current event to digits
175	AliEMCALGeometry * geom = AliEMCALGeometry::GetInstance();
176	if (!geom) {
177	AliError(Form("No geometry found !"));
178	return;
179	}
180
181	AliRunLoader *rl = AliRunLoader::GetRunLoader();
182	AliEMCALLoader loader = dynamic_cast<AliEMCALLoader>(rl->GetDetectorLoader("EMCAL"));
183
184	// get the digits
185	TClonesArray* digits = loader->Digits() ;
186	digits->Clear();
187
188	if (!digits) {
189	Error("Raw2Digits", "no digits found !");
190	return;
191	}
192	if (!reader) {
193	Error("Raw2Digits", "no raw reader found !");
194	return;
195	}
196
197	// Use AliAltroRawStream to read the ALTRO format. No need to
198	// reinvent the wheel :-)
199	AliCaloRawStream in(reader,"EMCAL");
200	// Select EMCAL DDL's;
201	reader->Select("EMCAL");
202
203	// reading is from previously existing AliEMCALGetter.cxx
204	// ReadRaw method
205	TF1 * signalF = new TF1("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
206	signalF->SetParNames("Charge", "Gain", "Amplitude", "TimeZero");
207
208	Int_t id = -1;
209	Int_t idigit = 0 ;
210	Double_t time = 0. ;
211	Double_t amp = 0. ;
212
213	TGraph * gSig = new TGraph(GetRawFormatTimeBins()) ;
214
215	Int_t eofReached = 0;
216	Int_t lowGain = 0;
217
218	in.Next(); // Go to first digit
219	do {
220	id = geom->GetAbsCellIdFromCellIndexes(in.GetModule(), in.GetRow(), in.GetColumn()) ;
221	lowGain = in.IsLowGain();
222	gSig->SetPoint(in.GetTime(),
223	in.GetTime()* GetRawFormatTimeMax() / GetRawFormatTimeBins(),
224	in.GetSignal()) ;
225
226	Int_t iTime = 1;
227	do {
228	if (!in.Next())
229	eofReached = 1;
230	else {
231	gSig->SetPoint(in.GetTime(),
232	in.GetTime()* GetRawFormatTimeMax() / GetRawFormatTimeBins(),
233	in.GetSignal()) ;
234	}
235	iTime++;
236	} while (!eofReached && !in.IsNewRow() && !in.IsNewColumn() && !in.IsNewModule());
237
238	FitRaw(gSig, signalF, amp, time) ;
239	if (lowGain)
240	amp *= fHighLowGainFactor;
241
242	if (amp > 0) {
243	AliDebug(2,Form("id %d amp %g", id, amp));
244	new((*digits)[idigit]) AliEMCALDigit( -1, -1, id, (Int_t)amp, time, idigit) ;
245	idigit++ ;
246	}
247	Int_t index ;
248
249	// Reset graph
250	for (index = 0; index < GetRawFormatTimeBins(); index++) {
251	gSig->SetPoint(index, index * GetRawFormatTimeMax() / GetRawFormatTimeBins(), 0) ;
252	}
253	} while (!eofReached); // EMCAL entries loop
254
255	delete signalF ;
256	delete gSig;
257
258	return ;
259	}
260
261	//____________________________________________________________________________
262	void AliEMCALRawUtils::FitRaw(TGraph * gSig, TF1* signalF, Double_t & amp, Double_t & time)
263	{
264	// Fits the raw signal time distribution; from AliEMCALGetter
265
266	const Int_t kNoiseThreshold = 0 ;
267	Double_t timezero1 = 0., timezero2 = 0., timemax = 0. ;
268	Double_t signal = 0., signalmax = 0. ;
269	amp = time = 0. ;
270
271	timezero1 = signalmax = timemax = 0. ;
272	timezero2 = GetRawFormatTimeMax();
273	Int_t index ;
274	for (index = 0; index < GetRawFormatTimeBins(); index++) {
275	gSig->GetPoint(index, time, signal) ;
276	if (signal > kNoiseThreshold && timezero1 == 0.)
277	timezero1 = time ;
278	if (signal <= kNoiseThreshold && timezero1 > 0. && timezero2 == 0.)
279	timezero2 = time ;
280	if (signal > signalmax) {
281	signalmax = signal ;
282	timemax = time ;
283	}
284	}
285
286	if ( timemax < GetRawFormatTimeMax() * 0.4 ) { // else its noise
287	signalF->SetParameter(0, signalmax) ;
288	signalF->SetParameter(1, timemax) ;
289	gSig->Fit(signalF, "QRON", "", 0., timezero2); //, "QRON") ;
290	amp = signalF->GetParameter(0) ;
291	time = signalF->GetParameter(1) - fgTimeTrigger;
292	}
293	return;
294	}
295	//__________________________________________________________________
296	Double_t AliEMCALRawUtils::RawResponseFunction(Double_t x, Double_t par)
297	{
298	// Shape of the electronics raw reponse:
299	// It is a semi-gaussian, 2nd order Gamma function of the general form
300	//
301	// t' = (t - t0 + tau) / tau
302	// F = A * t*N exp( N * ( 1 - t) ) for t >= 0
303	// F = 0 for t < 0
304	//
305	// parameters:
306	// A: par[0] // Amplitude = peak value
307	// t0: par[1]
308	// tau: fgTau
309	// N: fgOrder
310	//
311	Double_t signal ;
312	Double_t xx = ( x[0] - par[1] + fgTau ) / fgTau ;
313
314	if (xx < 0)
315	signal = 0. ;
316	else {
317	signal = par[0] * TMath::Power(xx , fgOrder) * TMath::Exp(fgOrder * (1 - xx )) ;
318	}
319	return signal ;
320	}
321
322	//__________________________________________________________________
323	Bool_t AliEMCALRawUtils::RawSampledResponse(
324	const Double_t dtime, const Double_t damp, Int_t * adcH, Int_t * adcL) const
325	{
326	// for a start time dtime and an amplitude damp given by digit,
327	// calculates the raw sampled response AliEMCAL::RawResponseFunction
328
329	const Int_t kRawSignalOverflow = 0x3FF ;
330	Bool_t lowGain = kFALSE ;
331
332	TF1 signalF("signal", RawResponseFunction, 0, GetRawFormatTimeMax(), 4);
333	signalF.SetParameter(0, damp) ;
334	signalF.SetParameter(1, dtime + fgTimeTrigger) ;
335
336	for (Int_t iTime = 0; iTime < GetRawFormatTimeBins(); iTime++) {
337	Double_t time = iTime * GetRawFormatTimeMax() / GetRawFormatTimeBins() ;
338	Double_t signal = signalF.Eval(time) ;
339	adcH[iTime] = static_cast<Int_t>(signal + 0.5) ;
340	if ( adcH[iTime] > kRawSignalOverflow ){ // larger than 10 bits
341	adcH[iTime] = kRawSignalOverflow ;
342	lowGain = kTRUE ;
343	}
344
345	signal /= fHighLowGainFactor;
346
347	adcL[iTime] = static_cast<Int_t>(signal + 0.5) ;
348	if ( adcL[iTime] > kRawSignalOverflow) // larger than 10 bits
349	adcL[iTime] = kRawSignalOverflow ;
350	}
351	return lowGain ;
352	}