Various changes to comply with stuff
[u/mrichter/AliRoot.git] / MUON / AliMUONDigitCalibrator.cxx
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d99769c3 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
18#include "AliMUONDigitCalibrator.h"
19
d99769c3 20#include "AliLog.h"
21#include "AliMUONCalibrationData.h"
22#include "AliMUONConstants.h"
23#include "AliMUONData.h"
24#include "AliMUONDigit.h"
c795d086 25#include "AliMUONVCalibParam.h"
d99769c3 26#include "TClonesArray.h"
27
1171bb0a 28///
29/// Class used to calibrate digits (either real or simulated ones).
30///
31/// The calibration consists of subtracting the pedestal
32/// and multiplying by a gain, so that
33/// Signal = (ADC-pedestal)*gain
34///
35/// Please note also that for the moment, if a digit lies on a dead channel
36/// we remove this digit from the list of digits.
37/// FIXME: this has to be revisited. By using the AliMUONDigit::fFlags we
38/// should in principle flag a digit as bad w/o removing it, but this
39/// then requires some changes in the cluster finder to deal with this extra
40/// information correctly (e.g. to set a quality for the cluster if it contains
41/// bad digits).
42///
43
d99769c3 44ClassImp(AliMUONDigitCalibrator)
45
46//_____________________________________________________________________________
47AliMUONDigitCalibrator::AliMUONDigitCalibrator(AliMUONData* muonData,
c795d086 48 AliMUONCalibrationData* calib)
d99769c3 49: TTask("AliMUONDigitCalibrator","Subtract pedestal from digit charge"),
50 fData(muonData),
51 fCalibrationData(calib)
52{
c795d086 53 //
54 // ctor. This class need the muonData to get access to the digit,
55 // and the calibrationData to get access to calibration parameters.
56 //
d99769c3 57}
58
1171bb0a 59//_____________________________________________________________________________
d99769c3 60AliMUONDigitCalibrator::~AliMUONDigitCalibrator()
61{
c795d086 62 //
63 // empty dtor.
64 //
d99769c3 65}
66
67//_____________________________________________________________________________
68void
69AliMUONDigitCalibrator::Exec(Option_t*)
70{
c795d086 71 //
72 // Main method.
73 // We loop on tracking chambers (i.e. we do nothing for trigger)
74 // and for each digit in that chamber, we calibrate it :
75 // a) if the corresponding channel is known to be bad, we set the signal to 0
76 // (so that digit can be suppressed later on)
77 // b) we then apply pedestal and gain corrections.
78
d99769c3 79 for ( Int_t ch = 0; ch < AliMUONConstants::NTrackingCh(); ++ch )
80 {
81 TClonesArray* digitArray = fData->Digits(ch);
82 Int_t nDigits = digitArray->GetEntriesFast();
83 for ( Int_t d = 0; d < nDigits; ++d )
84 {
85 AliMUONDigit* digit =
86 static_cast<AliMUONDigit*>(digitArray->UncheckedAt(d));
87
c795d086 88 // Very first check is whether this channel is known to be bad,
89 // in which case we set the signal to zero.
90 AliMUONVCalibParam* dead = static_cast<AliMUONVCalibParam*>
1171bb0a 91 (fCalibrationData->DeadChannels(digit->DetElemId(),digit->ManuId()));
c795d086 92 if ( dead && dead->ValueAsInt(digit->ManuChannel()) )
93 {
1171bb0a 94 AliWarning(Form("Removing dead channel detElemId %d manuId %d "
c795d086 95 "manuChannel %d",digit->DetElemId(),digit->ManuId(),
96 digit->ManuChannel()));
97 digit->SetSignal(0);
98 continue;
99 }
100
101 // If the channel is good, go on with the calibration itself.
102
103 AliMUONVCalibParam* pedestal = static_cast<AliMUONVCalibParam*>
1171bb0a 104 (fCalibrationData->Pedestals(digit->DetElemId(),digit->ManuId()));
c795d086 105
106 AliMUONVCalibParam* gain = static_cast<AliMUONVCalibParam*>
1171bb0a 107 (fCalibrationData->Gains(digit->DetElemId(),digit->ManuId()));
d99769c3 108
d99769c3 109 if (!pedestal)
110 {
c795d086 111 AliFatal(Form("Got a null ped object for DE,manu=%d,%d",
112 digit->DetElemId(),digit->ManuId()));
d99769c3 113
114 }
115 if (!gain)
116 {
c795d086 117 AliFatal(Form("Got a null gain object for DE,manu=%d,%d",
118 digit->DetElemId(),digit->ManuId()));
d99769c3 119 }
120
c795d086 121 Int_t manuChannel = digit->ManuChannel();
d99769c3 122 Int_t adc = digit->Signal();
c795d086 123 Float_t padc = adc-pedestal->ValueAsFloat(manuChannel,0);
124 if ( padc < 3.0*pedestal->ValueAsFloat(manuChannel,1) )
d99769c3 125 {
126 padc = 0.0;
127 }
c795d086 128 Float_t charge = padc*gain->ValueAsFloat(manuChannel,0);
d99769c3 129 Int_t signal = TMath::Nint(charge);
130 digit->SetSignal(signal);
c795d086 131 Int_t saturation = gain->ValueAsInt(manuChannel,1);
132 if ( signal >= saturation )
133 {
134 digit->Saturated(kTRUE);
135 }
d99769c3 136 }
137 }
138}