New RAW I/O. I rolled my own, because I wasn't happy with the old
[u/mrichter/AliRoot.git] / FMD / AliFMDDigitizer.cxx
CommitLineData
4347b38f 1/**************************************************************************
2 * Copyright(c) 2004, ALICE Experiment at CERN, All rights reserved. *
66d2ede1 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
4347b38f 16/* $Id$ */
17
18//////////////////////////////////////////////////////////////////////////////
19//
20// This class contains the procedures simulation ADC signal for the
21// Forward Multiplicity detector : Hits->Digits and Hits->SDigits
22//
23// Digits consists of
24// - Detector #
25// - Ring ID
26// - Sector #
27// - Strip #
28// - ADC count in this channel
29//
30// Digits consists of
31// - Detector #
32// - Ring ID
33// - Sector #
34// - Strip #
35// - Total energy deposited in the strip
36// - ADC count in this channel
37//
38// As the Digits and SDigits have so much in common, the classes
39// AliFMDDigitizer and AliFMDSDigitizer are implemented via a base
40// class AliFMDBaseDigitizer.
41//
42// +---------------------+
43// | AliFMDBaseDigitizer |
44// +---------------------+
45// ^
46// |
47// +----------+---------+
48// | |
49// +-----------------+ +------------------+
50// | AliFMDDigitizer | | AliFMDSDigitizer |
51// +-----------------+ +------------------+
52//
53// These classes has several paramters:
54//
55// fPedestal
56// fPedestalWidth
57// (Only AliFMDDigitizer)
58// Mean and width of the pedestal. The pedestal is simulated
59// by a Guassian, but derived classes my override MakePedestal
60// to simulate it differently (or pick it up from a database).
61//
62// fVA1MipRange
63// The dymamic MIP range of the VA1_ALICE pre-amplifier chip
64//
65// fAltroChannelSize
66// The largest number plus one that can be stored in one
67// channel in one time step in the ALTRO ADC chip.
68//
69// fSampleRate
70// How many times the ALTRO ADC chip samples the VA1_ALICE
71// pre-amplifier signal. The VA1_ALICE chip is read-out at
72// 10MHz, while it's possible to drive the ALTRO chip at
73// 25MHz. That means, that the ALTRO chip can have time to
74// sample each VA1_ALICE signal up to 2 times. Although it's
75// not certain this feature will be used in the production,
76// we'd like have the option, and so it should be reflected in
77// the code.
78//
4347b38f 79//
e802be3e 80// The shaping function of the VA1_ALICE is generally given by
4347b38f 81//
e802be3e 82// f(x) = A(1 - exp(-Bx))
4347b38f 83//
e802be3e 84// where A is the total charge collected in the pre-amp., and B is a
85// paramter that depends on the shaping time of the VA1_ALICE circut.
86//
87// When simulating the shaping function of the VA1_ALICe
88// pre-amp. chip, we have to take into account, that the shaping
89// function depends on the previous value of read from the pre-amp.
90//
91// That results in the following algorithm:
92//
93// last = 0;
94// FOR charge IN pre-amp. charge train DO
95// IF last < charge THEN
96// f(t) = (charge - last) * (1 - exp(-B * t)) + last
97// ELSE
98// f(t) = (last - charge) * exp(-B * t) + charge)
99// ENDIF
100// FOR i IN # samples DO
101// adc_i = f(i / (# samples))
102// DONE
103// last = charge
104// DONE
105//
106// Here,
107//
108// pre-amp. charge train
109// is a series of 128 charges read from the VA1_ALICE chip
110//
111// # samples
112// is the number of times the ALTRO ADC samples each of the 128
113// charges from the pre-amp.
4347b38f 114//
115// Where Q is the total charge collected by the VA1_ALICE
116// pre-amplifier. Q is then given by
117//
118// E S
119// Q = - -
120// e R
121//
122// where E is the total energy deposited in a silicon strip, R is the
123// dynamic range of the VA1_ALICE pre-amp (fVA1MipRange), e is the
124// energy deposited by a single MIP, and S ALTRO channel size in each
125// time step (fAltroChannelSize).
126//
127// The energy deposited per MIP is given by
128//
129// e = M * rho * w
130//
131// where M is the universal number 1.664, rho is the density of
132// silicon, and w is the depth of the silicon sensor.
133//
134// The final ADC count is given by
135//
136// C' = C + P
137//
138// where P is the (randomized) pedestal (see MakePedestal)
139//
140// This class uses the class template AliFMDMap<Type> to make an
141// internal cache of the energy deposted of the hits. The class
142// template is instantasized as
143//
144// typedef AliFMDMap<std::pair<Float_t, UShort_t> > AliFMDEdepMap;
145//
146// The first member of the values is the summed energy deposition in a
147// given strip, while the second member of the values is the number of
148// hits in a given strip. Using the second member, it's possible to
149// do some checks on just how many times a strip got hit, and what
150// kind of error we get in our reconstructed hits. Note, that this
151// information is currently not written to the digits tree. I think a
152// QA (Quality Assurance) digit tree is better suited for that task.
153// However, the information is there to be used in the future.
154//
155//
156// Latest changes by Christian Holm Christensen
157//
158//////////////////////////////////////////////////////////////////////////////
159
e802be3e 160// /1
161// | A(-1 + B + exp(-B))
162// | f(x) dx = ------------------- = 1
163// | B
164// / 0
165//
166// and B is the a parameter defined by the shaping time (fShapingTime).
167//
168// Solving the above equation, for A gives
169//
170// B
171// A = ----------------
172// -1 + B + exp(-B)
173//
174// So, if we define the function g: [0,1] -> [0:1] by
175//
176// / v
177// | Bu + exp(-Bu) - Bv - exp(-Bv)
178// g(u,v) = | f(x) dx = -A -----------------------------
179// | B
180// / u
181//
182// we can evaluate the ALTRO sample of the VA1_ALICE pre-amp between
183// any two times (u, v), by
184//
185//
186// B Bu + exp(-Bu) - Bv - exp(-Bv)
187// C = Q g(u,v) = - Q ---------------- -----------------------------
188// -1 + B + exp(-B) B
189//
190// Bu + exp(-Bu) - Bv - exp(-Bv)
191// = - Q -----------------------------
192// -1 + B + exp(-B)
193//
194
56b1929b 195#include <TTree.h> // ROOT_TTree
196#include <TRandom.h> // ROOT_TRandom
197#include <AliLog.h> // ALILOG_H
e802be3e 198#include "AliFMDDigitizer.h" // ALIFMDDIGITIZER_H
199#include "AliFMD.h" // ALIFMD_H
1a1fdef7 200#include "AliFMDGeometry.h" // ALIFMDGEOMETRY_H
201#include "AliFMDDetector.h" // ALIFMDDETECTOR_H
202#include "AliFMDRing.h" // ALIFMDRING_H
e802be3e 203#include "AliFMDHit.h" // ALIFMDHIT_H
204#include "AliFMDDigit.h" // ALIFMDDIGIT_H
8f6ee336 205#include "AliFMDParameters.h" // ALIFMDPARAMETERS_H
56b1929b 206#include <AliRunDigitizer.h> // ALIRUNDIGITIZER_H
207#include <AliRun.h> // ALIRUN_H
208#include <AliLoader.h> // ALILOADER_H
209#include <AliRunLoader.h> // ALIRUNLOADER_H
4347b38f 210
4347b38f 211//====================================================================
925e6570 212ClassImp(AliFMDBaseDigitizer)
1a1fdef7 213#if 0
214 ; // This is here to keep Emacs for indenting the next line
215#endif
4347b38f 216
217//____________________________________________________________________
218AliFMDBaseDigitizer::AliFMDBaseDigitizer()
219 : fRunLoader(0)
66d2ede1 220{
4347b38f 221 // Default ctor - don't use it
66d2ede1 222}
223
4347b38f 224//____________________________________________________________________
225AliFMDBaseDigitizer::AliFMDBaseDigitizer(AliRunDigitizer* manager)
226 : AliDigitizer(manager, "AliFMDBaseDigitizer", "FMD Digitizer base class"),
227 fRunLoader(0),
e802be3e 228 fEdep(AliFMDMap::kMaxDetectors,
229 AliFMDMap::kMaxRings,
230 AliFMDMap::kMaxSectors,
231 AliFMDMap::kMaxStrips)
66d2ede1 232{
4347b38f 233 // Normal CTOR
102e9e9c 234 AliDebug(1," processed");
4347b38f 235 SetShapingTime();
66d2ede1 236}
237
4347b38f 238//____________________________________________________________________
239AliFMDBaseDigitizer::AliFMDBaseDigitizer(const Char_t* name,
240 const Char_t* title)
241 : AliDigitizer(name, title),
242 fRunLoader(0),
e802be3e 243 fEdep(AliFMDMap::kMaxDetectors,
244 AliFMDMap::kMaxRings,
245 AliFMDMap::kMaxSectors,
246 AliFMDMap::kMaxStrips)
66d2ede1 247{
4347b38f 248 // Normal CTOR
249 AliDebug(1," processed");
4347b38f 250 SetShapingTime();
251}
3d44ce66 252
4347b38f 253//____________________________________________________________________
254AliFMDBaseDigitizer::~AliFMDBaseDigitizer()
255{
256 // Destructor
66d2ede1 257}
258
4347b38f 259//____________________________________________________________________
260Bool_t
261AliFMDBaseDigitizer::Init()
66d2ede1 262{
4347b38f 263 // Initialization
1e8f773e 264 AliFMDParameters::Instance()->Init();
4347b38f 265 return kTRUE;
66d2ede1 266}
267
88cb7938 268
4347b38f 269//____________________________________________________________________
8f6ee336 270UShort_t
271AliFMDBaseDigitizer::MakePedestal(UShort_t,
272 Char_t,
273 UShort_t,
274 UShort_t) const
275{
276 return 0;
277}
278
279//____________________________________________________________________
4347b38f 280void
281AliFMDBaseDigitizer::SumContributions(AliFMD* fmd)
282{
283 // Sum energy deposited contributions from each hit in a cache
284 // (fEdep).
285 if (!fRunLoader)
286 Fatal("SumContributions", "no run loader");
287
288 // Clear array of deposited energies
69b696b9 289 fEdep.Reset();
4347b38f 290
291 // Get the FMD loader
292 AliLoader* inFMD = fRunLoader->GetLoader("FMDLoader");
293 // And load the hits
294 inFMD->LoadHits("READ");
295
296 // Get the tree of hits
297 TTree* hitsTree = inFMD->TreeH();
298 if (!hitsTree) {
299 // Try again
300 inFMD->LoadHits("READ");
301 hitsTree = inFMD->TreeH();
302 }
303
304 // Get the FMD branch
305 TBranch* hitsBranch = hitsTree->GetBranch("FMD");
306 if (hitsBranch) fmd->SetHitsAddressBranch(hitsBranch);
307 else AliFatal("Branch FMD hit not found");
308
309 // Get a list of hits from the FMD manager
310 TClonesArray *fmdHits = fmd->Hits();
311
312 // Get number of entries in the tree
313 Int_t ntracks = Int_t(hitsTree->GetEntries());
314
8f6ee336 315 AliFMDParameters* param = AliFMDParameters::Instance();
a1f80595 316 Int_t read = 0;
4347b38f 317 // Loop over the tracks in the
318 for (Int_t track = 0; track < ntracks; track++) {
319 // Read in entry number `track'
a1f80595 320 read += hitsBranch->GetEntry(track);
4347b38f 321
322 // Get the number of hits
323 Int_t nhits = fmdHits->GetEntries ();
324 for (Int_t hit = 0; hit < nhits; hit++) {
325 // Get the hit number `hit'
326 AliFMDHit* fmdHit =
327 static_cast<AliFMDHit*>(fmdHits->UncheckedAt(hit));
328
329 // Extract parameters
330 UShort_t detector = fmdHit->Detector();
331 Char_t ring = fmdHit->Ring();
332 UShort_t sector = fmdHit->Sector();
333 UShort_t strip = fmdHit->Strip();
334 Float_t edep = fmdHit->Edep();
8f6ee336 335
336 // Check if strip is `dead'
337 if (param->IsDead(detector, ring, sector, strip)) continue;
338
339 // Give warning in case of double hit
e802be3e 340 if (fEdep(detector, ring, sector, strip).fEdep != 0)
a1f80595 341 AliDebug(5, Form("Double hit in %d%c(%d,%d)",
4347b38f 342 detector, ring, sector, strip));
343
8f6ee336 344 // Sum energy deposition
e802be3e 345 fEdep(detector, ring, sector, strip).fEdep += edep;
346 fEdep(detector, ring, sector, strip).fN += 1;
4347b38f 347 // Add this to the energy deposited for this strip
348 } // hit loop
349 } // track loop
a1f80595 350 AliDebug(1, Form("Size of cache: %d bytes, read %d bytes",
351 sizeof(fEdep), read));
4347b38f 352}
66d2ede1 353
4347b38f 354//____________________________________________________________________
355void
356AliFMDBaseDigitizer::DigitizeHits(AliFMD* fmd) const
66d2ede1 357{
4347b38f 358 // For the stored energy contributions in the cache (fEdep), convert
359 // the energy signal to ADC counts, and store the created digit in
360 // the digits array (AliFMD::fDigits)
361 //
1a1fdef7 362 AliFMDGeometry* geometry = AliFMDGeometry::Instance();
363
4347b38f 364 TArrayI counts(3);
365 for (UShort_t detector=1; detector <= 3; detector++) {
366 // Get pointer to subdetector
1a1fdef7 367 AliFMDDetector* det = geometry->GetDetector(detector);
4347b38f 368 if (!det) continue;
369 for (UShort_t ringi = 0; ringi <= 1; ringi++) {
8f6ee336 370 Char_t ring = ringi == 0 ? 'I' : 'O';
4347b38f 371 // Get pointer to Ring
8f6ee336 372 AliFMDRing* r = det->GetRing(ring);
4347b38f 373 if (!r) continue;
374
375 // Get number of sectors
376 UShort_t nSectors = UShort_t(360. / r->GetTheta());
377 // Loop over the number of sectors
378 for (UShort_t sector = 0; sector < nSectors; sector++) {
379 // Get number of strips
380 UShort_t nStrips = r->GetNStrips();
381 // Loop over the stips
e802be3e 382 Float_t last = 0;
4347b38f 383 for (UShort_t strip = 0; strip < nStrips; strip++) {
e802be3e 384 // Reset the counter array to the invalid value -1
4347b38f 385 counts.Reset(-1);
e802be3e 386 // Reset the last `ADC' value when we've get to the end of a
387 // VA1_ALICE channel.
388 if (strip % 128 == 0) last = 0;
389
8f6ee336 390 Float_t edep = fEdep(detector, ring, sector, strip).fEdep;
391 ConvertToCount(edep, last, detector, ring, sector, strip, counts);
e802be3e 392 last = edep;
8f6ee336 393 AddDigit(fmd, detector, ring, sector, strip, edep,
394 UShort_t(counts[0]), Short_t(counts[1]),
395 Short_t(counts[2]));
4347b38f 396#if 0
397 // This checks if the digit created will give the `right'
398 // number of particles when reconstructed, using a naiive
399 // approach. It's here only as a quality check - nothing
400 // else.
8f6ee336 401 CheckDigit(digit, fEdep(detector, ring, sector, strip).fN,
4347b38f 402 counts);
403#endif
404 } // Strip
405 } // Sector
406 } // Ring
407 } // Detector
408}
88cb7938 409
4347b38f 410//____________________________________________________________________
4347b38f 411void
412AliFMDBaseDigitizer::ConvertToCount(Float_t edep,
e802be3e 413 Float_t last,
8f6ee336 414 UShort_t detector,
415 Char_t ring,
416 UShort_t sector,
417 UShort_t strip,
4347b38f 418 TArrayI& counts) const
419{
e802be3e 420 // Convert the total energy deposited to a (set of) ADC count(s).
4347b38f 421 //
e802be3e 422 // This is done by
423 //
424 // Energy_Deposited ALTRO_Channel_Size
425 // ADC = -------------------------- ------------------- + pedestal
426 // Energy_Deposition_Of_1_MIP VA1_ALICE_MIP_Range
4347b38f 427 //
e802be3e 428 // Energy_Deposited fAltroChannelSize
429 // = --------------------------------- ----------------- + pedestal
430 // 1.664 * Si_Thickness * Si_Density fVA1MipRange
431 //
4347b38f 432 //
e802be3e 433 // = Energy_Deposited * ConversionFactor + pedestal
434 //
435 // However, this is modified by the response function of the
436 // VA1_ALICE pre-amp. chip in case we are doing oversampling of the
437 // VA1_ALICE output.
438 //
439 // In that case, we get N=fSampleRate values of the ADC, and the
440 // `EnergyDeposited' is a function of which sample where are
441 // calculating the ADC for
442 //
443 // ADC_i = f(EnergyDeposited, i/N, Last) * ConversionFactor + pedestal
444 //
445 // where Last is the Energy deposited in the previous strip.
446 //
447 // Here, f is the shaping function of the VA1_ALICE. This is given
448 // by
449 //
450 // | (E - l) * (1 - exp(-B * t) + l if E > l
451 // f(E, t, l) = <
452 // | (l - E) * exp(-B * t) + E otherwise
453 //
454 //
455 // = E + (l - E) * ext(-B * t)
456 //
8f6ee336 457 AliFMDParameters* param = AliFMDParameters::Instance();
458 Float_t convF = 1/param->GetPulseGain(detector,ring,sector,strip);
459 UShort_t ped = MakePedestal(detector,ring,sector,strip);
460 UInt_t maxAdc = param->GetAltroChannelSize();
461 UShort_t rate = param->GetSampleRate(AliFMDParameters::kBaseDDL);
462 UShort_t size = param->GetAltroChannelSize();
463
e802be3e 464 // In case we don't oversample, just return the end value.
8f6ee336 465 if (rate == 1) {
466 counts[0] = UShort_t(TMath::Min(edep * convF + ped, Float_t(size)));
e802be3e 467 return;
468 }
088f8e79 469
4347b38f 470 // Create a pedestal
088f8e79 471 Float_t b = fShapingTime;
8f6ee336 472 for (Ssiz_t i = 0; i < rate; i++) {
473 Float_t t = Float_t(i) / rate;
088f8e79 474 Float_t s = edep + (last - edep) * TMath::Exp(-b * t);
8f6ee336 475 counts[i] = UShort_t(TMath::Min(s * convF + ped, Float_t(maxAdc)));
4347b38f 476 }
477}
88cb7938 478
3d44ce66 479
4347b38f 480//====================================================================
925e6570 481ClassImp(AliFMDDigitizer)
66d2ede1 482
4347b38f 483//____________________________________________________________________
484AliFMDDigitizer::AliFMDDigitizer()
485 : AliFMDBaseDigitizer()
486{
487 // Default ctor - don't use it
488}
66d2ede1 489
4347b38f 490//____________________________________________________________________
491AliFMDDigitizer::AliFMDDigitizer(AliRunDigitizer* manager)
492 : AliFMDBaseDigitizer(manager)
493{
494 // Normal CTOR
495 AliDebug(1," processed");
4347b38f 496}
66d2ede1 497
4347b38f 498//____________________________________________________________________
499void
500AliFMDDigitizer::Exec(Option_t*)
501{
502 // Get the output manager
503 TString outFolder(fManager->GetOutputFolderName());
504 AliRunLoader* out =
505 AliRunLoader::GetRunLoader(outFolder.Data());
506 // Get the FMD output manager
507 AliLoader* outFMD = out->GetLoader("FMDLoader");
508
509 // Get the input loader
510 TString inFolder(fManager->GetInputFolderName(0));
511 fRunLoader =
a3537838 512 AliRunLoader::GetRunLoader(inFolder.Data());
4347b38f 513 if (!fRunLoader) {
514 AliError("Can not find Run Loader for input stream 0");
515 return;
516 }
517 // Get the AliRun object
518 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
519
520 // Get the AliFMD object
8f6ee336 521 AliFMD* fmd =
522 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
4347b38f 523 if (!fmd) {
524 AliError("Can not get FMD from gAlice");
525 return;
526 }
527
528 Int_t nFiles= fManager->GetNinputs();
529 for (Int_t inputFile = 0; inputFile < nFiles; inputFile++) {
530 AliDebug(1,Form(" Digitizing event number %d",
531 fManager->GetOutputEventNr()));
532 // Get the current loader
533 fRunLoader =
534 AliRunLoader::GetRunLoader(fManager->GetInputFolderName(inputFile));
535 if (!fRunLoader) Fatal("Exec", "no run loader");
536 // Cache contriutions
537 SumContributions(fmd);
538 }
539 // Digitize the event
540 DigitizeHits(fmd);
541
542 // Load digits from the tree
543 outFMD->LoadDigits("update");
544 // Get the tree of digits
545 TTree* digitTree = outFMD->TreeD();
546 if (!digitTree) {
547 outFMD->MakeTree("D");
548 digitTree = outFMD->TreeD();
549 }
550 digitTree->Reset();
551 // Make a branch in the tree
552 TClonesArray* digits = fmd->Digits();
553 fmd->MakeBranchInTree(digitTree, fmd->GetName(), &(digits), 4000, 0);
554 // TBranch* digitBranch = digitTree->GetBranch(fmd->GetName());
555 // Fill the tree
a1f80595 556 Int_t write = 0;
557 write = digitTree->Fill();
558 AliDebug(1, Form("Wrote %d bytes to digit tree", write));
66d2ede1 559
4347b38f 560 // Write the digits to disk
561 outFMD->WriteDigits("OVERWRITE");
562 outFMD->UnloadHits();
563 outFMD->UnloadDigits();
4110645f 564
4347b38f 565 // Reset the digits in the AliFMD object
566 fmd->ResetDigits();
567}
3d44ce66 568
88cb7938 569
4347b38f 570//____________________________________________________________________
571UShort_t
8f6ee336 572AliFMDDigitizer::MakePedestal(UShort_t detector,
573 Char_t ring,
574 UShort_t sector,
575 UShort_t strip) const
4347b38f 576{
088f8e79 577 // Make a pedestal
8f6ee336 578 AliFMDParameters* param =AliFMDParameters::Instance();
579 Float_t mean =param->GetPedestal(detector,ring,sector,strip);
580 Float_t width =param->GetPedestalWidth(detector,ring,sector,strip);
581 return UShort_t(TMath::Max(gRandom->Gaus(mean, width), 0.));
4347b38f 582}
88cb7938 583
4347b38f 584//____________________________________________________________________
585void
586AliFMDDigitizer::AddDigit(AliFMD* fmd,
587 UShort_t detector,
588 Char_t ring,
589 UShort_t sector,
590 UShort_t strip,
591 Float_t /* edep */,
592 UShort_t count1,
593 Short_t count2,
594 Short_t count3) const
595{
088f8e79 596 // Add a digit
69b696b9 597 fmd->AddDigitByFields(detector, ring, sector, strip, count1, count2, count3);
4347b38f 598}
3d44ce66 599
4347b38f 600//____________________________________________________________________
601void
8f6ee336 602AliFMDDigitizer::CheckDigit(AliFMDDigit* digit,
4347b38f 603 UShort_t nhits,
604 const TArrayI& counts)
605{
088f8e79 606 // Check that digit is consistent
8f6ee336 607 AliFMDParameters* param = AliFMDParameters::Instance();
608 UShort_t det = digit->Detector();
609 Char_t ring = digit->Ring();
610 UShort_t sec = digit->Sector();
611 UShort_t str = digit->Strip();
612 Float_t mean = param->GetPedestal(det,ring,sec,str);
613 Float_t width = param->GetPedestalWidth(det,ring,sec,str);
614 UShort_t range = param->GetVA1MipRange();
615 UShort_t size = param->GetAltroChannelSize();
616 Int_t integral = counts[0];
4347b38f 617 if (counts[1] >= 0) integral += counts[1];
618 if (counts[2] >= 0) integral += counts[2];
8f6ee336 619 integral -= Int_t(mean + 2 * width);
4347b38f 620 if (integral < 0) integral = 0;
621
8f6ee336 622 Float_t convF = Float_t(range) / size;
088f8e79 623 Float_t mips = integral * convF;
4347b38f 624 if (mips > Float_t(nhits) + .5 || mips < Float_t(nhits) - .5)
625 Warning("CheckDigit", "Digit -> %4.2f MIPS != %d +/- .5 hits",
626 mips, nhits);
627}
66d2ede1 628
4347b38f 629//====================================================================
925e6570 630ClassImp(AliFMDSDigitizer)
3d44ce66 631
4347b38f 632//____________________________________________________________________
633AliFMDSDigitizer::AliFMDSDigitizer()
634{
635 // Default ctor - don't use it
636}
88cb7938 637
4347b38f 638//____________________________________________________________________
639AliFMDSDigitizer::AliFMDSDigitizer(const Char_t* headerFile,
640 const Char_t* /* sdigfile */)
641 : AliFMDBaseDigitizer("FMDSDigitizer", "FMD SDigitizer")
642{
643 // Normal CTOR
644 AliDebug(1," processed");
3d44ce66 645
4347b38f 646 fRunLoader = AliRunLoader::GetRunLoader(); // Open(headerFile);
647 if (!fRunLoader)
648 Fatal("AliFMDSDigitizer", "cannot open session, header file '%s'",
649 headerFile);
650 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
651 if (!loader)
652 Fatal("AliFMDSDigitizer", "cannot find FMD loader in specified event");
3d44ce66 653
4347b38f 654 // Add task to tasks folder
655 loader->PostSDigitizer(this);
afddaa11 656
4347b38f 657}
88cb7938 658
4347b38f 659//____________________________________________________________________
660AliFMDSDigitizer::~AliFMDSDigitizer()
661{
088f8e79 662 // Destructor
4347b38f 663 AliLoader* loader = fRunLoader->GetLoader("FMDLoader");
664 loader->CleanSDigitizer();
665}
3d44ce66 666
4347b38f 667//____________________________________________________________________
668void
669AliFMDSDigitizer::Exec(Option_t*)
670{
671 // Get the output manager
672 if (!fRunLoader) {
673 Error("Exec", "Run loader is not set");
674 return;
675 }
676 if (!fRunLoader->GetAliRun()) fRunLoader->LoadgAlice();
677 if (!fRunLoader->TreeE()) fRunLoader->LoadHeader();
678
679 AliLoader* fmdLoader = fRunLoader->GetLoader("FMDLoader");
680 if (!fmdLoader) Fatal("Exec", "no FMD loader");
681
682 // Get the AliFMD object
683 AliFMD* fmd =
684 static_cast<AliFMD*>(fRunLoader->GetAliRun()->GetDetector("FMD"));
685 if (!fmd) {
686 AliError("Can not get FMD from gAlice");
687 return;
688 }
689
690 Int_t nEvents = Int_t(fRunLoader->TreeE()->GetEntries());
691 for (Int_t event = 0; event < nEvents; event++) {
692 AliDebug(1,Form(" Digitizing event number %d", event));
693 // Get the current loader
694 fRunLoader->GetEvent(event);
695
696 if (!fmdLoader->TreeS()) fmdLoader->MakeTree("S");
697 // Make a branch
698 fmd->MakeBranch("S");
699
700 // Cache contriutions
701 SumContributions(fmd);
702
703 // Digitize the event
704 DigitizeHits(fmd);
705
706 fmdLoader->TreeS()->Reset();
707 fmdLoader->TreeS()->Fill();
708 fmdLoader->WriteSDigits("OVERWRITE");
709 }
710}
66d2ede1 711
4347b38f 712//____________________________________________________________________
713void
714AliFMDSDigitizer::AddDigit(AliFMD* fmd,
715 UShort_t detector,
716 Char_t ring,
717 UShort_t sector,
718 UShort_t strip,
719 Float_t edep,
720 UShort_t count1,
721 Short_t count2,
722 Short_t count3) const
723{
088f8e79 724 // Add a summable digit
69b696b9 725 fmd->AddSDigitByFields(detector, ring, sector, strip, edep,
726 count1, count2, count3);
66d2ede1 727}
4347b38f 728
729
730
731//____________________________________________________________________
732//
733// EOF
734//
88cb7938 735
736
737
66d2ede1 738