1 | /* ======================================================================== *\
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2 | !
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3 | ! *
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4 | ! * This file is part of MARS, the MAGIC Analysis and Reconstruction
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5 | ! * Software. It is distributed to you in the hope that it can be a useful
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6 | ! * and timesaving tool in analysing Data of imaging Cerenkov telescopes.
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7 | ! * It is distributed WITHOUT ANY WARRANTY.
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8 | ! *
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9 | ! * Permission to use, copy, modify and distribute this software and its
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10 | ! * documentation for any purpose is hereby granted without fee,
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11 | ! * provided that the above copyright notice appear in all copies and
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12 | ! * that both that copyright notice and this permission notice appear
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13 | ! * in supporting documentation. It is provided "as is" without express
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14 | ! * or implied warranty.
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15 | ! *
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16 | !
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17 | !
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18 | ! Author(s): Josep Flix 1/2004 <mailto:jflix@ifae.es>
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19 | ! Author(s): Javier Rico 1/2004 <mailto:jrico@ifae.es>
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20 | !
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21 | ! Copyright: MAGIC Software Development, 2000-2004
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22 | !
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23 | !
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24 | \* ======================================================================== */
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25 |
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26 | /////////////////////////////////////////////////////////////////////////////
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27 | //
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28 | // MPedPhotCalc
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29 | //
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30 | // This is a Task class to compute, for each pixel, the signal mean and
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31 | // rms from a pedestal run file that has undergone the standard signal
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32 | // extration and calibration procedure. The signal rms can be used as
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33 | // reference to compute the significance of the measured signals in the
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34 | // following data runs (e.g. during the image cleaning).
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35 | //
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36 | // Input Containers:
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37 | // MCerPhotEvt
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38 | //
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39 | // Output Containers:
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40 | // MPedPhotCam
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41 | //
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42 | /////////////////////////////////////////////////////////////////////////////
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43 | #include "MPedPhotCalc.h"
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44 |
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45 | #include "MLog.h"
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46 | #include "MLogManip.h"
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47 |
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48 | #include "MParList.h"
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49 | #include "MRawRunHeader.h"
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50 |
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51 | #include "MCerPhotPix.h"
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52 | #include "MCerPhotEvt.h"
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53 |
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54 | #include "MPedPhotPix.h"
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55 | #include "MPedPhotCam.h"
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56 |
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57 | ClassImp(MPedPhotCalc);
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58 |
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59 | using namespace std;
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60 |
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61 | //
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62 | // Default constructor
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63 | //
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64 | MPedPhotCalc::MPedPhotCalc(const char *name, const char *title)
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65 | {
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66 | fName = name ? name : "MPedPhotCalc";
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67 | fTitle = title ? title : "Task to calculate pedestals from the charge computed from pedestal runs (in units of photons)";
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68 | }
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69 |
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70 | // --------------------------------------------------------------------------
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71 | //
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72 | // Look for the following input containers:
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73 | //
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74 | // - MCerPhotEvt
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75 | //
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76 | // The following output containers are also searched and created if
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77 | // they were not found:
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78 | //
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79 | // - MPedPhotCam
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80 | //
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81 | Int_t MPedPhotCalc::PreProcess( MParList *pList )
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82 | {
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83 | // Look for input container
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84 | fCerPhot = (MCerPhotEvt*)pList->FindObject("MCerPhotEvt");
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85 | if (!fCerPhot)
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86 | {
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87 | *fLog << err << "MPedPhotCalc::PreProcess Error: MCerPhotEvt not found... aborting." << endl;
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88 | return kFALSE;
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89 | }
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90 |
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91 | // Create output container
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92 | fPedestals = (MPedPhotCam*)pList->FindCreateObj("MPedPhotCam");
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93 | if (!fPedestals)
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94 | return kFALSE;
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95 |
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96 | return kTRUE;
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97 | }
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98 |
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99 | // --------------------------------------------------------------------------
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100 | //
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101 | // The ReInit searches for the following input containers:
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102 | // - MRawRunHeader
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103 | //
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104 | // It also initializes the data arrays fSumx and fSumx2
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105 | // (only for the first read file)
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106 | //
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107 | Bool_t MPedPhotCalc::ReInit(MParList *pList)
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108 | {
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109 | const MRawRunHeader *runheader = (MRawRunHeader*)pList->FindObject("MRawRunHeader");
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110 | if (!runheader)
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111 | {
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112 | *fLog << warn << dbginf;
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113 | *fLog << "Warning - cannot check file type, MRawRunHeader not found." << endl;
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114 | }
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115 | else
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116 | if (runheader->IsMonteCarloRun())
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117 | return kTRUE;
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118 |
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119 |
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120 | // Initialize arrays
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121 | if(fSumx.GetSize()==0)
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122 | {
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123 | const UShort_t num = fPedestals->GetSize();
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124 |
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125 | fSumx.Set(num);
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126 | fSumx2.Set(num);
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127 |
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128 | memset(fSumx.GetArray(), 0, sizeof(Float_t)*num);
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129 | memset(fSumx2.GetArray(), 0, sizeof(Float_t)*num);
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130 | }
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131 |
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132 | return kTRUE;
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133 | }
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134 |
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135 | // --------------------------------------------------------------------------
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136 | //
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137 | // Store the measured number of photons in arrays fSumx and fSumx2
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138 | // so that we can calculate the mean and rms in the PostProcess()
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139 | //
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140 | Int_t MPedPhotCalc::Process()
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141 | {
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142 | for(UInt_t i=0;i<fCerPhot->GetNumPixels();i++)
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143 | {
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144 | const MCerPhotPix &pix = (*fCerPhot)[i];
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145 |
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146 | const Float_t nphot = pix.GetNumPhotons();
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147 | const Int_t idx = pix.GetPixId();
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148 |
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149 | fSumx[idx] += nphot;
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150 | fSumx2[idx] += nphot*nphot;
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151 | }
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152 |
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153 | fPedestals->SetReadyToSave();
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154 |
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155 | return kTRUE;
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156 | }
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157 |
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158 | // --------------------------------------------------------------------------
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159 | //
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160 | // Compute mean and rms of the measured charge distribution (in photons)
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161 | //
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162 | Int_t MPedPhotCalc::PostProcess()
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163 | {
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164 | // Compute pedestals and rms from fSumx and fSumx2 arrays
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165 | const Int_t n = GetNumExecutions();
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166 | const Int_t npix = fSumx.GetSize();
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167 |
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168 | for(Int_t i=0; i<npix; i++)
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169 | {
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170 | const Float_t sum = fSumx[i];
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171 | const Float_t sum2 = fSumx2[i];
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172 |
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173 | const Float_t photped = sum/n;
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174 | const Float_t photrms = TMath::Sqrt((sum2-sum*sum/n)/(n-1.));
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175 |
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176 | (*fPedestals)[i].Set(photped,photrms);
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177 | }
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178 |
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179 | return kTRUE;
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180 | }
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