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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 | /* $Id$ */ | |
16 | /** @file AliFMDRawWriter.cxx | |
17 | @author Christian Holm Christensen <cholm@nbi.dk> | |
18 | @date Mon Mar 27 12:45:56 2006 | |
19 | @brief Class to write raw data | |
20 | */ | |
21 | //____________________________________________________________________ | |
22 | // | |
23 | // Class to write ADC values to a raw data file | |
24 | // | |
25 | // This class writes FMD Raw data to a file. The sample rate (number | |
26 | // of times the ALTRO ADC samples each pre-amp. channel - that is, | |
27 | // data from a single strip), can be set via SetSampleRate. | |
28 | // | |
29 | // Zero-suppression can be enabled by calling SetThreshold with a | |
30 | // non-zero argument. ADC values less than the value set will not be | |
31 | // written to output. Note, that if you use zero-suppression, you | |
32 | // need to explicitly set the sample rate when reading back the data | |
33 | // with AliFMDRawReader. | |
34 | // | |
35 | // This class uses the AliAltroBuffer class to write the data in the | |
36 | // ALTRO format. See the Exec member function for more information on | |
37 | // that format. | |
38 | // | |
39 | // #include <AliLog.h> // ALILOG_H | |
40 | #include "AliFMDDebug.h" // Better debug macros | |
41 | #include <AliLoader.h> // ALILOADER_H | |
42 | #include <AliAltroBufferV3.h> // ALIALTROBUFFER_H | |
43 | #include "AliFMD.h" // ALIFMD_H | |
44 | #include "AliFMDParameters.h" // ALIFMDPARAMETERS_H | |
45 | #include "AliFMDDigit.h" // ALIFMDDIGIT_H | |
46 | #include "AliFMDRawWriter.h" // ALIFMDRAWREADER_H | |
47 | #include "AliFMDAltroMapping.h" // ALIFMDALTROMAPPING_H | |
48 | // #include "AliFMDAltroIO.h" // ALIFMDALTROWRITER_H | |
49 | #include <TArrayI.h> // ROOT_TArrayI | |
50 | #include <TArrayF.h> // ROOT_TArrayI | |
51 | #include <TArrayC.h> // ROOT_TArrayI | |
52 | #include <TClonesArray.h> // ROOT_TClonesArray | |
53 | // #include <fstream> | |
54 | #include "AliDAQ.h" | |
55 | ||
56 | //____________________________________________________________________ | |
57 | ClassImp(AliFMDRawWriter) | |
58 | #if 0 | |
59 | ; // This is here to keep Emacs for indenting the next line | |
60 | #endif | |
61 | ||
62 | //____________________________________________________________________ | |
63 | AliFMDRawWriter::AliFMDRawWriter(AliFMD* fmd) | |
64 | : TTask("FMDRawWriter", "Writer of Raw ADC values from the FMD"), | |
65 | fFMD(fmd), | |
66 | fSampleRate(0), | |
67 | fChannelsPerAltro(0), | |
68 | fThreshold(0) | |
69 | { | |
70 | // CTOR | |
71 | AliFMDDebug(5, ("Created AliFMDRawWriter object")); | |
72 | } | |
73 | ||
74 | ||
75 | ||
76 | //____________________________________________________________________ | |
77 | void | |
78 | AliFMDRawWriter::Exec(Option_t*) | |
79 | { | |
80 | // Turn digits into raw data. | |
81 | // | |
82 | // Digits are read from the Digit branch, and processed to make | |
83 | // three DDL files, one for each of the sub-detectors FMD1, FMD2, | |
84 | // and FMD3. | |
85 | // | |
86 | // The raw data files consists of a header, followed by ALTRO | |
87 | // formatted blocks. | |
88 | // | |
89 | // +-------------+ | |
90 | // | Header | | |
91 | // +-------------+ | |
92 | // | ALTRO Block | | |
93 | // | ... | | |
94 | // +-------------+ | |
95 | // DDL file | |
96 | // | |
97 | // An ALTRO formatted block, in the FMD context, consists of a | |
98 | // number of counts followed by a trailer. | |
99 | // | |
100 | // +------------------+ | |
101 | // | Count | | |
102 | // | ... | | |
103 | // | possible fillers | | |
104 | // +------------------+ | |
105 | // | Trailer | | |
106 | // +------------------+ | |
107 | // ALTRO block | |
108 | // | |
109 | // The counts are listed backwards, that is, starting with the | |
110 | // latest count, and ending in the first. | |
111 | // | |
112 | // Each count consist of 1 or more ADC samples of the VA1_ALICE | |
113 | // pre-amp. signal. Just how many samples are used depends on | |
114 | // whether the ALTRO over samples the pre-amp. Each sample is a | |
115 | // 10-bit word, and the samples are grouped into 40-bit blocks | |
116 | // | |
117 | // +------------------------------------+ | |
118 | // | S(1) | S(2) | S(3) | S(4) | | |
119 | // | ... | ... | ... | ... | | |
120 | // | S(n) | T(n) | n+2 | 2AA | | |
121 | // +------------------------------------+ | |
122 | // Counts + possible filler | |
123 | // | |
124 | // The trailer of the number of words of signales, the starting | |
125 | // strip number, the sector number, and the ring ID; each 10-bit | |
126 | // words, packed into 40-bits. | |
127 | // | |
128 | // +------------------------------------+ | |
129 | // | 2AAA | Len | A | Address | | |
130 | // +------------------------------------+ | |
131 | // Trailer | |
132 | // | |
133 | // Note, that this method assumes that the digits are ordered. | |
134 | // | |
135 | AliLoader* loader = fFMD->GetLoader(); | |
136 | loader->LoadDigits("READ"); | |
137 | TTree* digitTree = loader->TreeD(); | |
138 | if (!digitTree) { | |
139 | AliError("no digit tree"); | |
140 | return; | |
141 | } | |
142 | ||
143 | TClonesArray* digits = new TClonesArray("AliFMDDigit", 1000); | |
144 | fFMD->SetTreeAddress(); | |
145 | TBranch* digitBranch = digitTree->GetBranch(fFMD->GetName()); | |
146 | if (!digitBranch) { | |
147 | AliError(Form("no branch for %s", fFMD->GetName())); | |
148 | return; | |
149 | } | |
150 | digitBranch->SetAddress(&digits); | |
151 | ||
152 | Int_t nEvents = Int_t(digitTree->GetEntries()); | |
153 | AliFMDDebug(5, ("Got a total of %5d events from tree", nEvents)); | |
154 | for (Int_t event = 0; event < nEvents; event++) { | |
155 | fFMD->ResetDigits(); | |
156 | digitTree->GetEvent(event); | |
157 | ||
158 | // Write out the digits | |
159 | WriteDigits(digits); | |
160 | } | |
161 | loader->UnloadDigits(); | |
162 | } | |
163 | ||
164 | #if 1 | |
165 | //____________________________________________________________________ | |
166 | void | |
167 | AliFMDRawWriter::WriteDigits(TClonesArray* digits) | |
168 | { | |
169 | // WRite an array of digits to disk file | |
170 | Int_t nDigits = digits->GetEntries(); | |
171 | if (nDigits < 1) return; | |
172 | AliFMDDebug(5, ("Got a total of %5d digits from tree", nDigits)); | |
173 | ||
174 | AliFMDParameters* pars = AliFMDParameters::Instance(); | |
175 | UShort_t threshold = 0; | |
176 | UInt_t prevddl = 0xFFFF; | |
177 | UInt_t prevaddr = 0xFFF; | |
178 | // UShort_t prevStrip = 0; | |
179 | ||
180 | // Which channel number in the ALTRO channel we're at | |
181 | UShort_t nWords = 0; | |
182 | UShort_t preSamples = 0; | |
183 | UShort_t sampleRate = 0; | |
184 | ||
185 | // A buffer to hold 1 ALTRO channel - Normally, one ALTRO channel | |
186 | // holds 128 VA1_ALICE channels, sampled at a rate of `sampleRate' | |
187 | TArrayI data(pars->GetChannelsPerAltro() * 8); | |
188 | TArrayF peds(pars->GetChannelsPerAltro() * 8); | |
189 | TArrayF noise(pars->GetChannelsPerAltro() * 8); | |
190 | ||
191 | // The Altro buffer | |
192 | AliAltroBufferV3* altro = 0; | |
193 | ||
194 | Int_t totalWords = 0; | |
195 | Int_t nCounts = 0; | |
196 | ||
197 | // Loop over the digits in the event. Note, that we assume the | |
198 | // the digits are in order in the branch. If they were not, we'd | |
199 | // have to cache all channels before we could write the data to | |
200 | // the ALTRO buffer, or we'd have to set up a map of the digits. | |
201 | UShort_t oldDet = 1000; | |
202 | for (Int_t i = 0; i < nDigits; i++) { | |
203 | // Get the digit | |
204 | AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i)); | |
205 | UShort_t det = digit->Detector(); | |
206 | Char_t ring = digit->Ring(); | |
207 | UShort_t sector = digit->Sector(); | |
208 | UShort_t strip = digit->Strip(); | |
209 | UShort_t ddl, addr, time; | |
210 | ||
211 | AliFMDDebug(15, ("Processing digit # %5d FMD%d%c[%2d,%3d]", | |
212 | i, det, ring, sector, strip)); | |
213 | threshold = pars->GetZeroSuppression(det, ring, sector, strip); | |
214 | sampleRate = pars->GetSampleRate(det, ring, sector, strip); | |
215 | preSamples = pars->GetPreSamples(det, ring, sector, strip); | |
216 | ||
217 | if (det != oldDet) { | |
218 | AliFMDDebug(5, ("Got new detector: %d (was %d)", det, oldDet)); | |
219 | oldDet = det; | |
220 | } | |
221 | AliFMDDebug(15, ("Sample rate is %d", sampleRate)); | |
222 | ||
223 | for (UShort_t j = 0; j < sampleRate; j++) { | |
224 | if (!pars->Detector2Hardware(det,ring,sector,strip,j,ddl,addr,time)){ | |
225 | AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]-%d", | |
226 | det, ring, sector, strip, j)); | |
227 | continue; | |
228 | } | |
229 | ||
230 | AliFMDDebug(10, ("FMD%d%c[%2d,%3d]-%d-> 0x%x/0x%x/%04d", | |
231 | det, ring, sector, strip, j, ddl, addr, time)); | |
232 | if (addr != prevaddr) { | |
233 | // Flush a channel to output | |
234 | AliFMDDebug(5, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d]-%d" | |
235 | "(b: 0x%02x, a: 0x%01x, c: 0x%02x, t: %04d), " | |
236 | "flushing old channel at 0x%x with %d words", | |
237 | addr, det, ring, sector, strip, j, | |
238 | (addr >> 7), (addr >> 4) & 0x7, addr & 0xf, | |
239 | time, prevaddr, nWords)); | |
240 | totalWords += nWords; | |
241 | ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold); | |
242 | if (altro) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold); | |
243 | data.Reset(-1); | |
244 | peds.Reset(0); | |
245 | noise.Reset(0); | |
246 | nWords = 0; | |
247 | prevaddr = addr; | |
248 | } | |
249 | if (ddl != prevddl) { | |
250 | AliFMDDebug(10, ("FMD: New DDL, was %d, now %d", prevddl, ddl)); | |
251 | // If an altro exists, delete the object, flushing the data to | |
252 | // disk, and closing the file. | |
253 | if (altro) { | |
254 | // When the first argument is false, we write the real | |
255 | // header. | |
256 | AliFMDDebug(15, ("Closing output")); | |
257 | altro->Flush(); | |
258 | altro->WriteDataHeader(kFALSE, kFALSE); | |
259 | delete altro; | |
260 | altro = 0; | |
261 | } | |
262 | prevddl = ddl; | |
263 | // Need to open a new DDL! | |
264 | TString filename(AliDAQ::DdlFileName(fFMD ? fFMD->GetName() : "FMD", ddl)); | |
265 | AliFMDDebug(5, ("New altro buffer with DDL file %s", filename.Data())); | |
266 | // Create a new altro buffer - a `1' as the second argument | |
267 | // means `write mode' | |
268 | altro = new AliAltroBufferV3(filename.Data()); | |
269 | altro->SetMapping(pars->GetAltroMap()); | |
270 | // Write a dummy (first argument is true) header to the DDL | |
271 | // file - later on, when we close the file, we write the real | |
272 | // header | |
273 | altro->WriteDataHeader(kTRUE, kFALSE); | |
274 | } | |
275 | ||
276 | // Get the pedestal value | |
277 | peds[time] = pars->GetPedestal(det, ring, sector, strip); | |
278 | noise[time] = pars->GetPedestalWidth(det, ring, sector, strip); | |
279 | ||
280 | // Store the counts of the ADC in the channel buffer | |
281 | AliFMDDebug(15, ("Storing FMD%d%c[%02d,%03d]-%d in timebin %d (%d)", | |
282 | det, ring, sector, strip, j, time, preSamples)); | |
283 | data[time] = digit->Count(j); | |
284 | nWords++; | |
285 | nCounts++; | |
286 | if (time == preSamples) { | |
287 | AliFMDDebug(15, ("Filling in %4d for %d presamples", | |
288 | data[time], preSamples)); | |
289 | for (int k = 0; k < preSamples; k++) { | |
290 | peds[k] = peds[time]; | |
291 | noise[k] = noise[time]; | |
292 | data[k] = data[time]; | |
293 | } | |
294 | nWords += preSamples; | |
295 | } | |
296 | } | |
297 | } | |
298 | // Finally, we need to close the final ALTRO buffer if it wasn't | |
299 | // already | |
300 | if (altro) { | |
301 | ZeroSuppress(data.fArray, nWords, peds.fArray, noise.fArray, threshold); | |
302 | if (nWords > 0) altro->WriteChannel(prevaddr,nWords,data.fArray,threshold); | |
303 | altro->Flush(); | |
304 | altro->WriteDataHeader(kFALSE, kFALSE); | |
305 | delete altro; | |
306 | } | |
307 | AliFMDDebug(5, ("Wrote a total of %d words for %d counts", | |
308 | nWords, nCounts)); | |
309 | } | |
310 | //____________________________________________________________________ | |
311 | void | |
312 | AliFMDRawWriter::ZeroSuppress(Int_t*& data, Int_t nWords, | |
313 | const Float_t* peds, | |
314 | const Float_t* noise, UShort_t threshold) const | |
315 | { | |
316 | // Simulate the ALTRO zero-suppression filter. The data passed in | |
317 | // the first array is modified, such that all suppressed channels | |
318 | // are set to some value below threshold. | |
319 | // | |
320 | // If threshold == 0 zero suppression is considered disabled, and no | |
321 | // action is taken. | |
322 | if (threshold <= 0) return; | |
323 | ||
324 | // const Short_t width = 3; | |
325 | // If fPedSubtract is false, compare data-(ped+f*noise), if true | |
326 | // always modify data by -(ped+f*noise), and force negative values | |
327 | // to zero. | |
328 | Bool_t pedSubtract = AliFMDParameters::Instance()->IsZSPedSubtract(); | |
329 | UShort_t pre = AliFMDParameters::Instance()->GetZSPreSamples(); | |
330 | UShort_t post = AliFMDParameters::Instance()->GetZSPostSamples(); | |
331 | Float_t factor = AliFMDParameters::Instance()->GetPedestalFactor(); | |
332 | ||
333 | TArrayC mask(nWords+1); | |
334 | for (Short_t i = 0; i < nWords; i++) { | |
335 | Float_t val = data[i] - peds[i] - factor * noise[i]; | |
336 | if (val < 0.5) val = 0; | |
337 | if (pedSubtract) data[i] = Int_t(val) & 0x3FF; | |
338 | ||
339 | mask[i] = (val > threshold ? 1 : 0); | |
340 | AliFMDDebug(10, ("Comparing sample %d %d-%f-%f*%f=%f to %d -> %s", | |
341 | i, data[i], peds[i], factor, noise[i], val, threshold, | |
342 | (mask[i] ? "above" : "below"))); | |
343 | } | |
344 | ||
345 | for (Short_t i = 0; i < nWords; i++) { | |
346 | if (mask[i]) { // Signal above, so do nothing | |
347 | AliFMDDebug(10, ("Sample %d, above", i)); | |
348 | if (i < nWords-1 && !mask[i+1]) { | |
349 | // After a valid sample. Increase the pointer to the next | |
350 | // possible data, thereby skipping over the post-samples | |
351 | AliFMDDebug(10, ("At sample %d, next is below, skipping %d to %d", | |
352 | i, post, i+post)); | |
353 | i += post; | |
354 | } | |
355 | continue; | |
356 | } | |
357 | ||
358 | Short_t lookahead = TMath::Min(Short_t(nWords), Short_t(i+pre)); | |
359 | AliFMDDebug(10, ("Sample %d, below, look to %d", i, lookahead)); | |
360 | if (mask[lookahead] && pre > 0) { | |
361 | AliFMDDebug(10, ("Sample %d is a pre-sample to %d", i, lookahead)); | |
362 | // We're in a presample, so don't modify the data, and increase | |
363 | // counter by the number of pre-samples | |
364 | i += pre-1; | |
365 | continue; | |
366 | } | |
367 | ||
368 | // This sample must be surpressed | |
369 | data[i] = threshold - 1; | |
370 | } | |
371 | } | |
372 | ||
373 | #else | |
374 | //____________________________________________________________________ | |
375 | void | |
376 | AliFMDRawWriter::WriteDigits(TClonesArray* digits) | |
377 | { | |
378 | Int_t nDigits = digits->GetEntries(); | |
379 | if (nDigits < 1) return; | |
380 | ||
381 | AliFMDParameters* pars = AliFMDParameters::Instance(); | |
382 | AliFMDAltroWriter* writer = 0; | |
383 | Int_t sampleRate = -1; | |
384 | UShort_t hwaddr = 0; | |
385 | UShort_t ddl = 0; | |
386 | std::ofstream* file = 0; | |
387 | Int_t ret = 0; | |
388 | for (Int_t i = 0; i < nDigits; i++) { | |
389 | // Get the digit | |
390 | AliFMDDigit* digit = static_cast<AliFMDDigit*>(digits->At(i)); | |
391 | UInt_t thisDDL, thisHwaddr; | |
392 | UShort_t det = digit->Detector(); | |
393 | Char_t ring = digit->Ring(); | |
394 | UShort_t sector = digit->Sector(); | |
395 | UShort_t strip = digit->Strip(); | |
396 | if (!pars->Detector2Hardware(det,ring,sector,strip,thisDDL,thisHwaddr)) { | |
397 | AliError(Form("Failed to get hardware address for FMD%d%c[%2d,%3d]", | |
398 | det, ring, sector, strip)); | |
399 | continue; | |
400 | } | |
401 | AliFMDDebug(40, ("Got DDL=%d and address=%d from FMD%d%c[%2d,%3d]", | |
402 | thisDDL, thisHwaddr, det, ring, sector, strip)); | |
403 | // Check if we're still in the same channel | |
404 | if (thisHwaddr != hwaddr) { | |
405 | AliFMDDebug(30, ("Now hardware address 0x%x from FMD%d%c[%2d,%3d] " | |
406 | "(board 0x%x, chip 0x%x, channel 0x%x)", | |
407 | thisHwaddr, det, ring, sector, strip, | |
408 | (thisHwaddr >> 7), (thisHwaddr >> 4) & 0x7, | |
409 | thisHwaddr & 0xf)); | |
410 | if (writer) writer->AddChannelTrailer(hwaddr); | |
411 | hwaddr = thisHwaddr; | |
412 | } | |
413 | // Check if we're still in the same detector (DDL) | |
414 | if (ddl != thisDDL) { | |
415 | if (writer) { | |
416 | AliFMDDebug(1, ("Closing altro writer %p", writer)); | |
417 | if ((ret = writer->Close()) < 0) { | |
418 | AliError(Form("Error: %s", writer->ErrorString(ret))); | |
419 | return; | |
420 | } | |
421 | delete writer; | |
422 | writer = 0; | |
423 | file->close(); | |
424 | delete file; | |
425 | file = 0; | |
426 | } | |
427 | ddl = thisDDL; | |
428 | } | |
429 | // If we haven't got a writer (either because none were made so | |
430 | // far, or because we've switch DDL), make one. | |
431 | if (!writer) { | |
432 | AliFMDDebug(1, ("Opening new ALTRO writer w/file %s", | |
433 | AliDAQ::DdlFileName("FMD",ddl))); | |
434 | file = new std::ofstream(AliDAQ::DdlFileName("FMD",ddl)); | |
435 | if (!file || !*file) { | |
436 | AliFatal(Form("Failed to open file %s", | |
437 | AliDAQ::DdlFileName("FMD",ddl))); | |
438 | return; | |
439 | } | |
440 | writer = new AliFMDAltroWriter(*file); | |
441 | writer->SetThreshold(pars->GetZeroSuppression(det, ring, sector, strip)); | |
442 | } | |
443 | // Write out our signal | |
444 | sampleRate = pars->GetSampleRate(det,ring,sector,strip); | |
445 | writer->AddSignal(digit->Count1()); | |
446 | if (sampleRate >= 2) writer->AddSignal(digit->Count2()); | |
447 | if (sampleRate >= 3) writer->AddSignal(digit->Count3()); | |
448 | } | |
449 | if (writer) { | |
450 | writer->AddChannelTrailer(hwaddr); | |
451 | writer->Close(); | |
452 | delete writer; | |
453 | file->close(); | |
454 | delete file; | |
455 | } | |
456 | } | |
457 | #endif | |
458 | ||
459 | ||
460 | ||
461 | ||
462 | //____________________________________________________________________ | |
463 | // | |
464 | // EOF | |
465 | // | |
466 |