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b864d801 | 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 | /////////////////////////////////////////////////////////////////////////////// | |
19 | /// | |
20 | /// This class provides access to TRD digits in raw data. | |
21 | /// | |
22 | /// It loops over all TRD digits in the raw data given by the AliRawReader. | |
23 | /// The Next method goes to the next digit. If there are no digits left | |
24 | /// it returns kFALSE. | |
25 | /// Several getters provide information about the current digit. | |
26 | /// | |
27 | /////////////////////////////////////////////////////////////////////////////// | |
28 | ||
29 | #include "AliTRDRawStream.h" | |
30 | #include "AliRawReader.h" | |
3551db50 | 31 | #include "AliTRDcalibDB.h" |
b864d801 | 32 | |
33 | ClassImp(AliTRDRawStream) | |
34 | ||
35 | ||
3551db50 | 36 | AliTRDRawStream::AliTRDRawStream(AliRawReader* rawReader) : |
b864d801 | 37 | fRawReader(rawReader), |
b864d801 | 38 | fCount(0), |
39 | fDetector(-1), | |
40 | fPrevDetector(-1), | |
41 | fNPads(-1), | |
42 | fRow(-1), | |
43 | fPrevRow(-1), | |
44 | fColumn(-1), | |
45 | fPrevColumn(-1), | |
46 | fTime(-1), | |
47 | fSignal(-1) | |
48 | { | |
49 | // create an object to read TRD raw digits | |
50 | ||
51 | fRawReader->Select(4); | |
52 | } | |
53 | ||
54 | AliTRDRawStream::AliTRDRawStream(const AliTRDRawStream& stream) : | |
55 | TObject(stream), | |
56 | fRawReader(NULL), | |
b864d801 | 57 | fCount(0), |
58 | fDetector(-1), | |
59 | fPrevDetector(-1), | |
60 | fNPads(-1), | |
61 | fRow(-1), | |
62 | fPrevRow(-1), | |
63 | fColumn(-1), | |
64 | fPrevColumn(-1), | |
65 | fTime(-1), | |
66 | fSignal(-1) | |
67 | { | |
68 | Fatal("AliTRDRawStream", "copy constructor not implemented"); | |
69 | } | |
70 | ||
71 | AliTRDRawStream& AliTRDRawStream::operator = (const AliTRDRawStream& | |
72 | /* stream */) | |
73 | { | |
74 | Fatal("operator =", "assignment operator not implemented"); | |
75 | return *this; | |
76 | } | |
77 | ||
78 | AliTRDRawStream::~AliTRDRawStream() | |
79 | { | |
80 | // clean up | |
81 | ||
82 | } | |
83 | ||
84 | ||
85 | Bool_t AliTRDRawStream::Next() | |
86 | { | |
87 | // read the next raw digit | |
88 | // returns kFALSE if there is no digit left | |
89 | ||
90 | fPrevDetector = fDetector; | |
91 | fPrevRow = fRow; | |
92 | fPrevColumn = fColumn; | |
93 | UChar_t data; | |
94 | ||
3551db50 | 95 | AliTRDcalibDB* calibration = AliTRDcalibDB::Instance(); |
96 | if (!calibration) | |
97 | return kFALSE; | |
98 | ||
99 | Int_t timeBins = calibration->GetNumberOfTimeBins(); | |
100 | ||
b864d801 | 101 | while (fCount >= 0) { |
102 | ||
103 | while (fCount == 0) { // next detector | |
104 | // read the flag | |
105 | if (!fRawReader->ReadNextChar(data)) return kFALSE; | |
106 | if (data != 0xBB) { | |
107 | Error("Next", "wrong flag: %x", data); | |
108 | fCount = -1; | |
109 | return kFALSE; | |
110 | } | |
111 | ||
112 | // read the detector number | |
113 | if (!fRawReader->ReadNextChar(data)) { | |
114 | Error("Next", "could not read detector number"); | |
115 | fCount = -1; | |
116 | return kFALSE; | |
117 | } | |
118 | fDetector = data; | |
119 | if (!fRawReader->ReadNextChar(data)) { | |
120 | Error("Next", "could not read detector number"); | |
121 | fCount = -1; | |
122 | return kFALSE; | |
123 | } | |
124 | fDetector += (UInt_t(data) << 8); | |
125 | ||
126 | // read the number of byts | |
127 | if (!fRawReader->ReadNextChar(data)) { | |
128 | Error("Next", "could not read number of bytes"); | |
129 | fCount = -1; | |
130 | return kFALSE; | |
131 | } | |
132 | fCount = data; | |
133 | if (!fRawReader->ReadNextChar(data)) { | |
134 | Error("Next", "could not read number of bytes"); | |
135 | fCount = -1; | |
136 | return kFALSE; | |
137 | } | |
138 | fCount += (UInt_t(data) << 8); | |
928e9fae | 139 | if (!fRawReader->ReadNextChar(data)) { |
140 | Error("Next", "could not read number of bytes"); | |
141 | fCount = -1; | |
142 | return kFALSE; | |
143 | } | |
144 | fCount += (UInt_t(data) << 16); | |
b864d801 | 145 | |
146 | // read the number of active pads | |
147 | if (!fRawReader->ReadNextChar(data)) { | |
148 | Error("Next", "could not read number of active pads"); | |
149 | fCount = -1; | |
150 | return kFALSE; | |
151 | } | |
152 | fNPads = data; | |
153 | if (!fRawReader->ReadNextChar(data)) { | |
154 | Error("Next", "could not read number of active pads"); | |
155 | fCount = -1; | |
156 | return kFALSE; | |
157 | } | |
158 | fNPads += (UInt_t(data) << 8); | |
159 | ||
3551db50 | 160 | fTime = timeBins; |
b864d801 | 161 | |
b864d801 | 162 | } |
163 | ||
164 | // read the pad row and column number | |
3551db50 | 165 | if ((fTime >= timeBins) && (fCount > 2)) { |
b864d801 | 166 | if (!fRawReader->ReadNextChar(data)) { |
167 | Error("Next", "could not read row number"); | |
168 | fCount = -1; | |
169 | return kFALSE; | |
170 | } | |
171 | fCount--; | |
172 | fRow = data - 1; | |
173 | if (!fRawReader->ReadNextChar(data)) { | |
174 | Error("Next", "could not read column number"); | |
175 | fCount = -1; | |
176 | return kFALSE; | |
177 | } | |
178 | fCount--; | |
179 | fColumn = data - 1; | |
180 | fTime = 0; | |
181 | } | |
182 | ||
183 | // read the next data byte | |
184 | if (!fRawReader->ReadNextChar(data)) { | |
185 | Error("Next", "could not read data"); | |
186 | fCount = -1; | |
187 | return kFALSE; | |
188 | } | |
189 | fCount--; | |
190 | ||
191 | if (data == 0) { // zeros | |
192 | if (!fRawReader->ReadNextChar(data)) { | |
193 | Error("Next", "could not read time value"); | |
194 | fCount = -1; | |
195 | return kFALSE; | |
196 | } | |
197 | fCount--; | |
198 | fTime += data + 1; | |
199 | ||
200 | } else { // signal | |
201 | fSignal = (UInt_t(data & 0x7F) << 8); | |
202 | if (!fRawReader->ReadNextChar(data)) { | |
203 | Error("Next", "could not read ADC value"); | |
204 | fCount = -1; | |
205 | return kFALSE; | |
206 | } | |
207 | fCount--; | |
208 | fSignal += data; | |
209 | fTime++; | |
210 | return kTRUE; | |
211 | } | |
212 | } | |
213 | ||
214 | return kFALSE; | |
215 | } |