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31a920d3 | 1 | /************************************************************************** |
2 | * This file is property of and copyright by the ALICE HLT Project * | |
3 | * All rights reserved. * | |
4 | * * | |
5 | * Primary Authors: Per Thomas Hille <perthi@fys.uio.no> * | |
ebf7cafe | 6 | * Ã\98ystein Djuvsland <oystein.djuvsland@gmail.com> * |
31a920d3 | 7 | * * |
8 | * Permission to use, copy, modify and distribute this software and its * | |
9 | * documentation strictly for non-commercial purposes is hereby granted * | |
10 | * without fee, provided that the above copyright notice appears in all * | |
11 | * copies and that both the copyright notice and this permission notice * | |
12 | * appear in the supporting documentation. The authors make no claims * | |
13 | * about the suitability of this software for any purpose. It is * | |
14 | * provided "as is" without express or implied warranty. * | |
15 | **************************************************************************/ | |
16 | ||
17 | #include <Riostream.h> | |
18 | #include "AliAltroDecoder.h" | |
19 | #include "AliAltroData.h" | |
20 | ||
ac672c4c | 21 | // Class for fast decoding of RCU/Altro raw data format (DDL format) |
22 | // to PC readable form. The decoding is done in 3 steps. | |
23 | // 1) The RCU payload consistist of a variable number of 160 bit words | |
24 | // denoted a DDL block. All the DDL blocks of an RCU payload is transformed | |
25 | // to 16 integers wich is then put into a buffer of integers big enought to contain the | |
26 | // biggest number of samples possible | |
27 | // 2) The decoded buffer is then accesible for the NextChannel functions wich reads | |
28 | // the altro channel data (samples) contained in the payload. The first call to NextChannel gives the | |
29 | // last altro channel of the back linked list, the next call the second last channel ..etc untill | |
30 | // all channles are read. | |
31 | // 3) (optional) For each Altro channel one chan invoke the member function NextBunch which gives on first call | |
32 | // The last bunch (the bunch with the highest timestamp), on next call the second last bunch..etc | |
33 | // untill all bunches are read | |
34 | ||
35 | ||
31a920d3 | 36 | ClassImp(AliAltroDecoder) |
37 | ||
38 | AliAltroDecoder::AliAltroDecoder() : f32DtaPtr(0), | |
ebf7cafe | 39 | f8DtaPtr(0), |
ac672c4c | 40 | fkN32HeaderWords(8), |
ebf7cafe | 41 | fN40AltroWords(0), |
42 | fN40RcuAltroWords(0), | |
43 | fNDDLBlocks(0), | |
44 | f32LastDDLBlockSize(5), | |
45 | f32PayloadSize(0), | |
46 | fOutBufferIndex(0), | |
47 | fSize(0), | |
48 | fNAltro10bitWords(0), | |
49 | fComplete(0), | |
50 | fInComplete(0), | |
51 | fDecodeIfCorruptedTrailer(kTRUE), | |
52 | fIsDecoded(kFALSE), | |
53 | fIsFatalCorruptedTrailer(kTRUE) | |
31a920d3 | 54 | { |
ac672c4c | 55 | // Default constructor |
31a920d3 | 56 | } |
57 | ||
58 | ||
59 | AliAltroDecoder::~AliAltroDecoder() | |
60 | { | |
ac672c4c | 61 | // Default destructor |
31a920d3 | 62 | } |
63 | ||
64 | ||
ac672c4c | 65 | Bool_t AliAltroDecoder::CheckPayloadTrailer() const |
31a920d3 | 66 | { |
ac672c4c | 67 | //Check wether or not there is consistency between the number of 40 bit altro words given by |
68 | //the RCU payload and the number of 40 bit words calculated from the size of the RCU payload. | |
69 | ||
31a920d3 | 70 | if(fN40AltroWords != fN40RcuAltroWords) |
71 | { | |
72 | return kFALSE; | |
73 | } | |
74 | else | |
75 | { | |
76 | return kTRUE; | |
77 | } | |
78 | } | |
79 | ||
80 | ||
81 | Bool_t AliAltroDecoder::Decode() | |
ebf7cafe | 82 | { |
ac672c4c | 83 | // Decodes the RCU payload (all altro channels in one go) from the DDL format to |
84 | // PC readable form | |
85 | ||
ebf7cafe | 86 | if( fIsFatalCorruptedTrailer == kTRUE) |
31a920d3 | 87 | { |
ebf7cafe | 88 | printf("\n AliAltroDecoder::Decode(), WARNING, attempt to decode badly corrupted data\n"); |
89 | printf("\n AliAltroDecoder::Decode(). Please check on the return value (-1 if fataly corrupted) of the SetMemory() function\n"); | |
90 | return kFALSE; | |
91 | } | |
92 | ||
93 | else | |
31a920d3 | 94 | { |
ebf7cafe | 95 | // see header file for class documentation |
96 | fComplete = 0; | |
97 | fInComplete = 0; | |
98 | ||
ac672c4c | 99 | Int_t tmpcnt = CountAAApaddings(); |
31a920d3 | 100 | |
ebf7cafe | 101 | if(tmpcnt == 3) |
102 | { | |
103 | fN40AltroWords = fN40AltroWords -1; | |
104 | } | |
105 | else if(tmpcnt == 5) | |
106 | { | |
107 | fN40AltroWords = fN40AltroWords -2; | |
108 | } | |
109 | else if(tmpcnt == 8) | |
110 | { | |
111 | fN40AltroWords = fN40AltroWords -3; | |
112 | } | |
31a920d3 | 113 | |
ebf7cafe | 114 | if( ((CheckPayloadTrailer() == kTRUE) || fDecodeIfCorruptedTrailer == kTRUE ) && (fSize > 32) ) |
31a920d3 | 115 | { |
ebf7cafe | 116 | // fDDLBlockCnt = 0; |
117 | fOutBufferIndex = 0; | |
118 | ||
119 | for(Int_t i = 0; i < fNDDLBlocks; i++) | |
120 | { | |
121 | DecodeDDLBlock(); | |
122 | } | |
31a920d3 | 123 | |
ebf7cafe | 124 | DecodeLastDDLBlock(); |
125 | fOutBufferIndex = fN40AltroWords*4 - 1; | |
31a920d3 | 126 | |
ebf7cafe | 127 | // DumpData(fOutBuffer, 400,4); |
31a920d3 | 128 | |
ebf7cafe | 129 | fIsDecoded = kTRUE; |
130 | return kTRUE; | |
131 | } | |
132 | ||
133 | else | |
134 | { | |
135 | cout <<" ERROR: data integrity check failed, discarding data" << endl; | |
136 | cout << "Size of datablock is " << fSize << endl; | |
137 | cout << "fN40AltroWords = " << fN40AltroWords << endl; | |
138 | cout << "fN40RcuAltroWords = " << fN40RcuAltroWords << endl; | |
139 | return kFALSE; | |
140 | } | |
31a920d3 | 141 | |
31a920d3 | 142 | } |
143 | } | |
144 | ||
145 | ||
146 | Bool_t AliAltroDecoder::NextChannel(AliAltroData *altroDataPtr) | |
147 | { | |
ac672c4c | 148 | // Reads the next altro channel in the RCU payload after the RCU payload |
149 | // has been decoded. The channles are read strarting from the end (backlinked list) | |
150 | // Returns kTRUE as long as ther are unread channles in the payload | |
151 | // Returns kFALSE when all the channels has been read. | |
152 | ||
ebf7cafe | 153 | if(fIsFatalCorruptedTrailer == kTRUE) |
31a920d3 | 154 | { |
ebf7cafe | 155 | printf("\n AliAltroDecoder::NextChannel(), WARNING, attempt to decode badly corrupted data\n"); |
156 | printf("\n AliAltroDecoder::NextChannel(), Please check on the return value (-1 if fataly corrupted) of the SetMemory() function\n"); | |
157 | return kFALSE; | |
158 | } | |
159 | ||
160 | else | |
31a920d3 | 161 | { |
31a920d3 | 162 | |
ebf7cafe | 163 | if(fIsDecoded != kTRUE) |
164 | { | |
165 | cout <<"AliAltroDecoder::NextChanne, WARNING, buffer was not decoded, decoding now.. "<< endl; | |
166 | Decode(); | |
167 | } | |
31a920d3 | 168 | |
ac672c4c | 169 | if(fOutBufferIndex > fkN32HeaderWords) |
31a920d3 | 170 | { |
ebf7cafe | 171 | if((fOutBuffer[fOutBufferIndex] << 4 ) | ((fOutBuffer[fOutBufferIndex-1] & 0x3c0) >> 6) == 0x2aaa) |
172 | { | |
173 | altroDataPtr->SetIsComplete(kTRUE); | |
174 | fComplete ++; | |
175 | } | |
176 | else | |
177 | { | |
178 | altroDataPtr->SetIsComplete(kFALSE); | |
179 | fInComplete ++; | |
180 | } | |
181 | ||
182 | fOutBufferIndex --; | |
183 | fNAltro10bitWords = ( (fOutBuffer[fOutBufferIndex] & 0x3f) << 4 ) | ((fOutBuffer[fOutBufferIndex -1] & (0xF << 6)) >> 6) ; | |
184 | fOutBufferIndex --; | |
185 | altroDataPtr->SetHadd( ((fOutBuffer[fOutBufferIndex] & 0x3)) << 10 | ( fOutBuffer[fOutBufferIndex-1] ) ); | |
186 | ||
187 | fOutBufferIndex --; | |
188 | ||
189 | if(fNAltro10bitWords%4 == 0) | |
190 | { | |
191 | fOutBufferIndex = fOutBufferIndex - fNAltro10bitWords; | |
192 | } | |
193 | else | |
194 | { | |
195 | fOutBufferIndex = fOutBufferIndex - fNAltro10bitWords -(4 - fNAltro10bitWords%4); | |
196 | } | |
197 | ||
198 | ||
199 | altroDataPtr->SetData( &fOutBuffer[fOutBufferIndex] ); | |
200 | fOutBufferIndex --; | |
201 | altroDataPtr->SetDataSize( fNAltro10bitWords ); | |
202 | return kTRUE; | |
203 | ||
31a920d3 | 204 | } |
205 | else | |
206 | { | |
ebf7cafe | 207 | return kFALSE; |
31a920d3 | 208 | } |
209 | ||
31a920d3 | 210 | } |
211 | } | |
212 | ||
31a920d3 | 213 | |
ac672c4c | 214 | Int_t AliAltroDecoder::CountAAApaddings() const |
31a920d3 | 215 | { |
ac672c4c | 216 | // Use for simulated data only. |
217 | // Patch for incorrectly simulated data. Counts the number of | |
218 | // 2aaa word in the trailer of the payload and tries to figure out | |
219 | // the correct number of 40 bit altro words in the RCU pauload | |
220 | ||
31a920d3 | 221 | UShort_t *tailPtr= (UShort_t *)(f32DtaPtr +f32PayloadSize); |
222 | Int_t cnt = 0; | |
223 | ||
224 | tailPtr --; | |
225 | ||
226 | while(*tailPtr == 0xaaaa) | |
227 | { | |
228 | cnt ++; | |
229 | tailPtr --; | |
230 | } | |
231 | ||
232 | tailPtr = tailPtr + cnt +1; | |
233 | ||
234 | return cnt; | |
235 | } | |
236 | ||
237 | ||
238 | Float_t AliAltroDecoder::GetFailureRate() | |
239 | { | |
ac672c4c | 240 | // Prints to stdout the percent of altroblocks that |
241 | // is missing the 2aaa trailer. | |
242 | ||
31a920d3 | 243 | Float_t tmp = 0; |
244 | cout << "Number of Complete channles = " << fComplete <<endl; | |
245 | cout << "Number of InComplete channles = " << fInComplete <<endl; | |
246 | tmp = (100*(Float_t)fInComplete)/((Float_t)fComplete + (Float_t)fInComplete); | |
247 | cout <<"There are "<< tmp <<"% incomplete channels"<<endl; | |
248 | return tmp; | |
249 | } | |
250 | ||
251 | ||
252 | void AliAltroDecoder::PrintInfo(AliAltroData &altrodata, Int_t n, Int_t nPerLine) | |
253 | { | |
ac672c4c | 254 | // prints data and address information contained in altrodata |
255 | // to the standard output | |
256 | ||
31a920d3 | 257 | cout << "altrodata.fDataSize = " << altrodata.GetDataSize() << endl; |
258 | cout << "altrodata.fHadd = " << altrodata.GetHadd() <<endl; | |
259 | const UInt_t* data = altrodata.GetData(); | |
260 | for(Int_t i= 0; i< n; i++) | |
261 | { | |
262 | if( (i%nPerLine == 0) && (i != 0) ) | |
263 | { | |
264 | printf("\n"); | |
265 | } | |
266 | printf("%d\t", data[i]); | |
267 | } | |
268 | printf("\n"); | |
269 | } | |
270 | ||
271 | ||
ebf7cafe | 272 | int AliAltroDecoder::SetMemory(UChar_t *dtaPtr, UInt_t size) |
31a920d3 | 273 | { |
ac672c4c | 274 | // Sets the pointer to the memory block that should be decoded |
275 | // Returns a negative value if an inconsistency in the data is detected | |
276 | ||
ebf7cafe | 277 | int iRet = 0; |
31a920d3 | 278 | Int_t tmpTrailerSize; |
279 | fIsDecoded = kFALSE; | |
280 | f8DtaPtr =dtaPtr; | |
281 | fSize = size; | |
282 | f8DtaPtr =f8DtaPtr + fSize; | |
283 | f32DtaPtr = (UInt_t *)f8DtaPtr; | |
284 | tmpTrailerSize = *(f32DtaPtr - 1); | |
285 | ||
286 | if(tmpTrailerSize <= MAX_TRAILER_WORDS) | |
287 | { | |
288 | tmpTrailerSize = tmpTrailerSize; //assume that the last word of the buffer gives the number of trailer words | |
289 | } | |
290 | else | |
291 | { | |
292 | tmpTrailerSize = 1; //assume that last word is ONE, and that the this word gives the number of 40 bit altro words | |
293 | } | |
294 | ||
ac672c4c | 295 | f32PayloadSize = fSize/4 - (fkN32HeaderWords + tmpTrailerSize); |
31a920d3 | 296 | fN40AltroWords = (32*f32PayloadSize)/40; |
297 | fNDDLBlocks = f32PayloadSize/5; | |
298 | f32LastDDLBlockSize = f32PayloadSize%DDL_32BLOCK_SIZE; | |
ebf7cafe | 299 | |
300 | if(tmpTrailerSize > 0 && tmpTrailerSize < 5) | |
301 | { | |
302 | f32DtaPtr = f32DtaPtr - tmpTrailerSize; | |
303 | fN40RcuAltroWords = *f32DtaPtr; | |
ac672c4c | 304 | f32DtaPtr = (UInt_t *)dtaPtr + fkN32HeaderWords; |
ebf7cafe | 305 | fIsFatalCorruptedTrailer = kFALSE; |
306 | } | |
307 | else | |
308 | { | |
309 | printf("\n AliAltroDecoder::SetMemory, ERROR\n, trailer is corrupted"); | |
310 | fIsFatalCorruptedTrailer = kTRUE; | |
311 | iRet = -1; | |
312 | } | |
ebf7cafe | 313 | |
314 | return iRet; | |
315 | ||
31a920d3 | 316 | } |
317 | ||
318 | ||
319 | void AliAltroDecoder::DecodeDDLBlock() | |
320 | { | |
ac672c4c | 321 | //Decode one 160 bit DDL block into 16 x 16 bit integers (only least significant 10 bits are filled) |
322 | ||
31a920d3 | 323 | fOutBuffer[fOutBufferIndex] = *f32DtaPtr & 0x3ff; //s0 |
324 | fOutBufferIndex ++; | |
325 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc00) >> 10; //s1 | |
326 | fOutBufferIndex ++; | |
327 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0x3ff00000) >> 20; //s2 | |
328 | fOutBufferIndex ++; | |
329 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xc0000000) >> 30; //s3_1 | |
330 | f32DtaPtr ++; | |
331 | fOutBuffer[fOutBufferIndex] = fOutBuffer[fOutBufferIndex] | ((*f32DtaPtr & 0xff) << 2); //s3_2 | |
332 | fOutBufferIndex ++; | |
333 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0x3ff00) >> 8; //s4 | |
334 | fOutBufferIndex ++; | |
335 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc0000) >> 18; //s5 | |
336 | fOutBufferIndex ++; | |
337 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xf0000000) >> 28; //s6_1 | |
338 | f32DtaPtr ++; | |
339 | fOutBuffer[fOutBufferIndex] = fOutBuffer[fOutBufferIndex] | ((*f32DtaPtr & 0x3f) << 4); //s6_2 | |
340 | fOutBufferIndex ++; | |
341 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc0) >> 6; //s7 | |
342 | fOutBufferIndex ++; | |
343 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0x3ff0000) >> 16; //s8 | |
344 | fOutBufferIndex ++; | |
345 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xFC000000) >> 26; //s9_1 | |
346 | f32DtaPtr ++; | |
347 | fOutBuffer[fOutBufferIndex] = fOutBuffer[fOutBufferIndex] | ((*f32DtaPtr & 0xf) << 6); //s9_2 | |
348 | fOutBufferIndex ++; | |
349 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0x3ff0) >> 4; //s10 | |
350 | fOutBufferIndex ++; | |
351 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc000) >> 14; //s11 | |
352 | fOutBufferIndex ++; | |
353 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xff000000) >> 24; //s12_1 | |
354 | f32DtaPtr ++; | |
355 | fOutBuffer[fOutBufferIndex] = fOutBuffer[fOutBufferIndex] | ((*f32DtaPtr & 0x3) << 8); //s12_2 | |
356 | fOutBufferIndex ++; | |
357 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc) >> 2; //s13 | |
358 | fOutBufferIndex ++; | |
359 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0x3ff000) >> 12; //s14 | |
360 | fOutBufferIndex ++; | |
361 | fOutBuffer[fOutBufferIndex] = (*f32DtaPtr & 0xffc00000) >> 22; //s15 | |
362 | f32DtaPtr ++; | |
363 | fOutBufferIndex ++; | |
364 | } | |
365 | ||
366 | ||
367 | void AliAltroDecoder::DecodeLastDDLBlock() | |
368 | { | |
ac672c4c | 369 | // Decode one 160 bit DDL block into 16 integers. |
370 | // In order to use the same decoding function (DecodeDDLBlock()) | |
371 | // a copy of the the last DDL block is made and | |
372 | // if the las block does not align with 160 bits then it is padded with zeroes | |
373 | ||
31a920d3 | 374 | for(Int_t i=0; i < f32LastDDLBlockSize; i++) |
375 | { | |
376 | fDDLBlockDummy[i] = *f32DtaPtr; | |
377 | f32DtaPtr ++; | |
378 | } | |
379 | ||
380 | f32DtaPtr = fDDLBlockDummy; | |
381 | f32DtaPtr ++; | |
382 | DecodeDDLBlock(); | |
383 | } |