]>
Commit | Line | Data |
---|---|---|
7ab595b2 | 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 is a class for reading raw data memory buffers. | |
21 | /// | |
22 | /////////////////////////////////////////////////////////////////////////////// | |
23 | ||
24 | #include "AliRawReaderMemory.h" | |
25 | #include <TSystem.h> | |
26 | ||
27 | ||
28 | ClassImp(AliRawReaderMemory) | |
29 | ||
30 | ||
31 | AliRawReaderMemory::AliRawReaderMemory() : | |
f3c1e83c | 32 | fPosition(0), |
e8692df9 | 33 | fBuffers(), |
34 | fCurrent(0) | |
7ab595b2 | 35 | { |
36 | // create an object to read digits from | |
37 | // the given memory location | |
7ab595b2 | 38 | } |
39 | ||
40 | AliRawReaderMemory::AliRawReaderMemory(UChar_t* memory, UInt_t size) : | |
f3c1e83c | 41 | fPosition(0), |
e8692df9 | 42 | fBuffers(), |
43 | fCurrent(0) | |
7ab595b2 | 44 | { |
45 | // create an object to read digits from the given memory | |
e8692df9 | 46 | fBuffers.push_back(AliRRMBuffer(memory, size, -1)); |
7ab595b2 | 47 | } |
48 | ||
49 | AliRawReaderMemory::~AliRawReaderMemory() | |
50 | { | |
51 | // close the input memory | |
7ab595b2 | 52 | } |
53 | ||
299738b9 | 54 | void AliRawReaderMemory::RequireHeader(Bool_t required) |
55 | { | |
56 | // Reading of raw data in case of missing | |
57 | // raw data header is not implemented for | |
58 | // this class | |
59 | if (!required) | |
60 | Fatal("AliRawReaderMemory","Reading of raw data without raw data header is not implemented !"); | |
61 | ||
62 | AliRawReader::RequireHeader(required); | |
63 | } | |
64 | ||
7ab595b2 | 65 | Bool_t AliRawReaderMemory::ReadHeader() |
66 | { | |
67 | // read a data header at the current buffer position | |
68 | // returns kFALSE if the mini header could not be read | |
69 | ||
e8692df9 | 70 | Bool_t result=kFALSE; |
71 | if (fCurrent>=fBuffers.size()) return kFALSE; | |
b6ae8ba1 | 72 | |
7ab595b2 | 73 | do { |
e8692df9 | 74 | result=kFALSE; |
75 | do { | |
76 | if (fBuffers[fCurrent].GetEquipmentId() == -1) | |
77 | { | |
78 | Warning("ReadHeader", "The equipment ID is not set for the DDL memory buffer."); | |
79 | } | |
80 | if (!fBuffers[fCurrent].GetBuffer()) break; | |
81 | ||
b6ae8ba1 | 82 | // Check if we would not read past the end of the buffer. |
e8692df9 | 83 | if ( fPosition+fCount >= fBuffers[fCurrent].GetBufferSize() ) break; |
b6ae8ba1 | 84 | |
e8692df9 | 85 | fHeader = reinterpret_cast<AliRawDataHeader*>(fBuffers[fCurrent].GetBuffer()+fPosition+fCount); |
b6ae8ba1 | 86 | |
87 | // Check that the header is sane, that is the size does not go past the buffer. | |
88 | // Otherwise try again at the next word location. | |
e8692df9 | 89 | while (1) { |
76a7ad7a | 90 | if ( ( (fHeader->fSize == 0) || |
e8692df9 | 91 | ((Int_t)fPosition + fCount + (Int_t)fHeader->fSize > (Int_t)fBuffers[fCurrent].GetBufferSize() ) ) |
76a7ad7a | 92 | && fHeader->fSize != 0xFFFFFFFF) { |
93 | ||
e8692df9 | 94 | if (fPosition + sizeof(UInt_t) <= fBuffers[fCurrent].GetBufferSize()) { |
b6ae8ba1 | 95 | fPosition += sizeof(UInt_t); |
96 | continue; | |
97 | } else { | |
98 | Error("ReadHeader", "Could not find a valid DDL header!"); | |
99 | return kFALSE; | |
299738b9 | 100 | } |
b6ae8ba1 | 101 | } else { |
102 | fPosition += fCount + sizeof(AliRawDataHeader); | |
103 | } | |
e8692df9 | 104 | break; |
105 | } | |
7ab595b2 | 106 | |
107 | if (fHeader->fSize != 0xFFFFFFFF) { | |
7ab595b2 | 108 | fCount = fHeader->fSize - sizeof(AliRawDataHeader); |
109 | } else { | |
e8692df9 | 110 | fCount = fBuffers[fCurrent].GetBufferSize() - sizeof(AliRawDataHeader); |
7ab595b2 | 111 | } |
e8692df9 | 112 | } while (!(result=IsSelected()) && OpenNextBuffer()); |
113 | } while (!result && OpenNextBuffer()); | |
114 | ||
115 | return result; | |
116 | } | |
b6ae8ba1 | 117 | |
e8692df9 | 118 | Bool_t AliRawReaderMemory::OpenNextBuffer() |
119 | { | |
120 | // increment to next buffer | |
121 | fPosition=0; | |
122 | fCount=0; | |
123 | if (fCurrent>=fBuffers.size()) return kFALSE; | |
124 | if (++fCurrent>=fBuffers.size()) return kFALSE; | |
7ab595b2 | 125 | return kTRUE; |
126 | } | |
127 | ||
128 | Bool_t AliRawReaderMemory::ReadNextData(UChar_t*& data) | |
129 | { | |
130 | // reads the next payload at the current buffer position | |
131 | // returns kFALSE if the data could not be read | |
132 | ||
133 | while (fCount == 0) { | |
134 | if (!ReadHeader()) return kFALSE; | |
135 | } | |
136 | UInt_t currentPosition = fPosition; | |
137 | fPosition += fCount; | |
138 | fCount = 0; | |
139 | ||
e8692df9 | 140 | data = fBuffers[fCurrent].GetBuffer()+currentPosition; |
7ab595b2 | 141 | return kTRUE; |
142 | } | |
143 | ||
144 | Bool_t AliRawReaderMemory::ReadNext(UChar_t* data, Int_t size) | |
145 | { | |
146 | // reads the next block of data at the current buffer position | |
e8692df9 | 147 | // but does not shift to the next equipment. The next equipment |
148 | // must be activated by calling ReadHeader | |
7ab595b2 | 149 | // returns kFALSE if the data could not be read |
150 | ||
e8692df9 | 151 | |
152 | if (fCurrent>=fBuffers.size()) return kFALSE; | |
153 | if ( fBuffers[fCurrent].GetBufferSize()-fPosition < (UInt_t)size ) return kFALSE; | |
7ab595b2 | 154 | |
e8692df9 | 155 | memcpy( data, fBuffers[fCurrent].GetBuffer()+fPosition, size ); |
7ab595b2 | 156 | fCount -= size; |
157 | fPosition += size; | |
158 | return kTRUE; | |
159 | } | |
160 | ||
161 | ||
162 | Bool_t AliRawReaderMemory::Reset() | |
163 | { | |
164 | // reset the current position in the buffer to the beginning of the curevent | |
165 | ||
b6ae8ba1 | 166 | fHeader = NULL; |
7ab595b2 | 167 | fCount = 0; |
168 | fPosition = 0; | |
e8692df9 | 169 | fCurrent=0; |
7ab595b2 | 170 | return kTRUE; |
171 | } | |
172 | ||
173 | Bool_t AliRawReaderMemory::NextEvent() | |
174 | { | |
175 | // each memory buffer always contains only one event | |
59a76075 | 176 | if (fEventNumber < 0) { |
177 | fEventNumber++; | |
178 | return kTRUE; | |
179 | } | |
180 | else | |
181 | return kFALSE; | |
7ab595b2 | 182 | } |
183 | ||
184 | Bool_t AliRawReaderMemory::RewindEvents() | |
185 | { | |
186 | // reset the event counter | |
59a76075 | 187 | fEventNumber = -1; |
7ab595b2 | 188 | |
189 | return Reset(); | |
190 | } | |
191 | ||
192 | Bool_t AliRawReaderMemory::SetMemory( UChar_t* memory, ULong_t size ) | |
193 | { | |
e8692df9 | 194 | // SetMemory function kept for backward compatibility, only allowed |
195 | // if no blocks have been added so far | |
196 | if (!memory || size<=0) return kFALSE; | |
197 | if (fBuffers.size()>1 || (fBuffers.size()==1 && fPosition==0 && fCurrent==0)) { | |
198 | Error("SetMemory","can not SetMemory for multiple buffers, use AddBuffer(...)"); | |
199 | return kFALSE; | |
200 | } | |
201 | if (fBuffers.size()==1) fBuffers.pop_back(); | |
202 | fBuffers.push_back(AliRRMBuffer(memory, size, -1)); | |
203 | fCurrent=0; | |
b6ae8ba1 | 204 | fHeader = NULL; |
7ab595b2 | 205 | fCount = 0; |
206 | fPosition = 0; | |
e8692df9 | 207 | return kTRUE; |
208 | } | |
209 | ||
210 | void AliRawReaderMemory::SetEquipmentID(Int_t id) | |
211 | { | |
212 | // SetMemory function kept for backward compatibility, only allowed | |
213 | // if no blocks have been added so far, set equipment id of the first | |
214 | // buffer | |
215 | if (fBuffers.size()>1) { | |
216 | Error("SetEquipmentID", "can not SetEquipmentID for multiple buffers, use AddBuffer(...)"); | |
217 | return; | |
218 | } | |
219 | if (fBuffers.size()==0 || fCurrent>=fBuffers.size()) { | |
220 | Error("SetEquipmentID", "no block available to set equipment id"); | |
221 | return; | |
222 | } | |
223 | fBuffers[fCurrent].SetEquipmentId(id); | |
224 | } | |
225 | ||
226 | Int_t AliRawReaderMemory::GetEquipmentSize() const | |
227 | { | |
228 | // get the size of the equipment, that is payload + CDH | |
229 | if (fCurrent>=fBuffers.size()) return 0; | |
230 | return fBuffers[fCurrent].GetBufferSize(); | |
231 | } | |
232 | ||
233 | Int_t AliRawReaderMemory::GetEquipmentId() const | |
234 | { | |
235 | // get the current equipment id | |
236 | if (fCurrent>=fBuffers.size()) return -1; | |
237 | return fBuffers[fCurrent].GetEquipmentId(); | |
7ab595b2 | 238 | } |
239 | ||
e8692df9 | 240 | Bool_t AliRawReaderMemory::AddBuffer(UChar_t* memory, ULong_t size, Int_t equipmentId ) |
241 | { | |
242 | // Add a buffer to the list | |
243 | if (!memory || size<=0 || equipmentId<0 ) return kFALSE; | |
244 | fBuffers.push_back(AliRRMBuffer(memory, size, equipmentId)); | |
245 | return kTRUE; | |
246 | } | |
247 | ||
248 | void AliRawReaderMemory::ClearBuffers() | |
249 | { | |
250 | // Clear the buffer list | |
251 | fBuffers.clear(); | |
252 | Reset(); | |
253 | } | |
254 | ||
255 | AliRawReaderMemory::AliRRMBuffer::AliRRMBuffer() | |
256 | : | |
257 | fBuffer(NULL), | |
258 | fBufferSize(0), | |
259 | fEquipmentId(-1) | |
260 | { | |
261 | // ctor | |
262 | } | |
263 | ||
264 | AliRawReaderMemory::AliRRMBuffer::AliRRMBuffer(UChar_t* pBuffer, UInt_t bufferSize, Int_t equipmentId) | |
265 | : | |
266 | fBuffer(pBuffer), | |
267 | fBufferSize(bufferSize), | |
268 | fEquipmentId(equipmentId) | |
269 | { | |
270 | // ctor | |
271 | } | |
272 | ||
273 | AliRawReaderMemory::AliRRMBuffer::~AliRRMBuffer() | |
274 | { | |
275 | // dtor | |
276 | } | |
277 | ||
278 | AliRawReaderMemory::AliRRMBuffer::AliRRMBuffer(const AliRRMBuffer& src) | |
279 | : | |
280 | fBuffer(src.fBuffer), | |
281 | fBufferSize(src.fBufferSize), | |
282 | fEquipmentId(src.fEquipmentId) | |
283 | { | |
284 | // copy ctor, there are no buffers allocated internally, pointers | |
285 | // are just copied | |
286 | } | |
287 | ||
288 | AliRawReaderMemory::AliRRMBuffer& AliRawReaderMemory::AliRRMBuffer::operator=(const AliRRMBuffer& src) | |
289 | { | |
290 | // assignment op | |
291 | fBuffer=src.fBuffer; | |
292 | fBufferSize=src.fBufferSize; | |
293 | fEquipmentId=src.fEquipmentId; | |
294 | return *this; | |
295 | } |