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[u/mrichter/AliRoot.git] / ITS / AliITSClusterFinderV2SDD.cxx
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04366a57 1/**************************************************************************
2 * Copyright(c) 1998-2003, 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 **************************************************************************/
d76cb3ad 15
16/* $Id$*/
17
04366a57 18////////////////////////////////////////////////////////////////////////////
19// Implementation of the ITS clusterer V2 class //
20// //
21// Origin: Iouri Belikov, CERN, Jouri.Belikov@cern.ch //
22// //
23///////////////////////////////////////////////////////////////////////////
24
25
04366a57 26
ae485645 27#include <TClonesArray.h>
add58ef6 28#include <TBits.h>
04366a57 29#include "AliITSClusterFinderV2SDD.h"
00a7cc50 30#include "AliITSRecPoint.h"
01ef1bd4 31#include "AliITSRecPointContainer.h"
7d62fb64 32#include "AliITSDetTypeRec.h"
04366a57 33#include "AliRawReader.h"
0599a018 34#include "AliITSRawStreamSDD.h"
2f8ed7ab 35#include "AliITSRawStreamSDDCompressed.h"
5bfe44ce 36#include "AliITSCalibrationSDD.h"
253e68a0 37#include "AliITSresponseSDD.h"
5bfe44ce 38#include "AliITSDetTypeRec.h"
debf7b78 39#include "AliITSReconstructor.h"
5bfe44ce 40#include "AliITSsegmentationSDD.h"
04366a57 41#include "AliITSdigitSDD.h"
b4704be3 42#include "AliITSgeomTGeo.h"
debf7b78 43
04366a57 44ClassImp(AliITSClusterFinderV2SDD)
45
add58ef6 46AliITSClusterFinderV2SDD::AliITSClusterFinderV2SDD(AliITSDetTypeRec* dettyp):AliITSClusterFinder(dettyp),
47 fNAnodes(0),
48 fNTimeBins(0),
49 fNZbins(0),
d59a647b 50 fNXbins(0),
51 fCutOnPeakLoose(0.),
52 fCutOnPeakTight(0.),
53 fMaxDrTimeForTightCut(0.)
a66a0eb6 54{
04366a57 55 //Default constructor
56
add58ef6 57 fNAnodes = GetSeg()->NpzHalf();
58 fNZbins = fNAnodes+2;
59 fNTimeBins = GetSeg()->Npx();
60 fNXbins = fNTimeBins+2;
61 AliDebug(2,Form("Cells in SDD cluster finder: Andoes=%d TimeBins=%d",fNAnodes,fNTimeBins));
62 const Int_t kMaxBin=fNZbins*fNXbins;
63 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++){
64 fDDLBins[iHyb]=new AliBin[kMaxBin];
65 }
d59a647b 66 SetPeakSelection(15.,30.,2000.);
04366a57 67}
68
69
add58ef6 70//______________________________________________________________________
71AliITSClusterFinderV2SDD::~AliITSClusterFinderV2SDD()
72{
73 //Destructor
74 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++){
75 delete [] fDDLBins[iHyb];
76 }
77}
78
79//______________________________________________________________________
04366a57 80void AliITSClusterFinderV2SDD::FindRawClusters(Int_t mod){
81
82 //Find clusters V2
83 SetModule(mod);
84 FindClustersSDD(fDigits);
85
86}
87
add58ef6 88//______________________________________________________________________
04366a57 89void AliITSClusterFinderV2SDD::FindClustersSDD(TClonesArray *digits) {
90 //------------------------------------------------------------
91 // Actual SDD cluster finder
92 //------------------------------------------------------------
04366a57 93
add58ef6 94 const Int_t kMaxBin=fNZbins*fNXbins;
04366a57 95 AliBin *bins[2];
4952f440 96 bins[0]=new AliBin[kMaxBin];
97 bins[1]=new AliBin[kMaxBin];
add58ef6 98 TBits *anodeFired[2];
99 anodeFired[0]=new TBits(fNAnodes);
100 anodeFired[1]=new TBits(fNAnodes);
101 anodeFired[0]->ResetAllBits();
102 anodeFired[1]->ResetAllBits();
404c1c29 103 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
9c7f5947 104 if(cal==0){
105 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
106 return;
107 }
83ec5e27 108
04366a57 109 AliITSdigitSDD *d=0;
110 Int_t i, ndigits=digits->GetEntriesFast();
111 for (i=0; i<ndigits; i++) {
112 d=(AliITSdigitSDD*)digits->UncheckedAt(i);
20f3f947 113 Int_t ian=d->GetCoord1();
114 Int_t itb=d->GetCoord2();
05b25e73 115 //Int_t iSide=0;
116 //if (ian >= fNAnodes) iSide=1;
75065a60 117 Float_t gain=cal->GetChannelGain(ian)/fDetTypeRec->GetAverageGainSDD();
83ec5e27 118 Float_t charge=d->GetSignal(); // returns expanded signal
119 // (10 bit, low threshold already added)
20f3f947 120 Float_t baseline = cal->GetBaseline(ian);
121 if(charge>baseline) charge-=baseline;
122 else charge=0;
5683bd96 123
9c7f5947 124 if(gain>0.){ // Bad channels have gain=0.
125 charge/=gain;
20f3f947 126 if(charge<cal->GetThresholdAnode(ian)) continue;
9c7f5947 127 Int_t q=(Int_t)(charge+0.5);
20f3f947 128 Int_t y=itb+1;
129 Int_t z=ian+1;
add58ef6 130 if (z <= fNAnodes){
131 bins[0][y*fNZbins+z].SetQ(q);
132 bins[0][y*fNZbins+z].SetMask(1);
133 bins[0][y*fNZbins+z].SetIndex(i);
134 anodeFired[0]->SetBitNumber(ian);
9c7f5947 135 } else {
add58ef6 136 z-=fNAnodes;
137 bins[1][y*fNZbins+z].SetQ(q);
138 bins[1][y*fNZbins+z].SetMask(1);
139 bins[1][y*fNZbins+z].SetIndex(i);
140 anodeFired[1]->SetBitNumber(ian-fNAnodes);
9c7f5947 141 }
04366a57 142 }
143 }
144
add58ef6 145 FindClustersSDD(bins, anodeFired, digits);
04366a57 146
147 delete[] bins[0];
148 delete[] bins[1];
add58ef6 149 delete anodeFired[0];
150 delete anodeFired[1];
04366a57 151
152}
153
add58ef6 154//______________________________________________________________________
04366a57 155void AliITSClusterFinderV2SDD::
add58ef6 156FindClustersSDD(AliBin* bins[2], TBits* anodeFired[2],
de075dae 157 TClonesArray *digits, TClonesArray *clusters, Int_t jitter) {
04366a57 158 //------------------------------------------------------------
159 // Actual SDD cluster finder
160 //------------------------------------------------------------
b4704be3 161
debf7b78 162 static AliITSRecoParam *repa = NULL;
163 if(!repa){
164 repa = (AliITSRecoParam*) AliITSReconstructor::GetRecoParam();
165 if(!repa){
ed446fa3 166 repa = AliITSRecoParam::GetHighFluxParam();
debf7b78 167 AliWarning("Using default AliITSRecoParam class");
168 }
169 }
b4704be3 170 const TGeoHMatrix *mT2L=AliITSgeomTGeo::GetTracking2LocalMatrix(fModule);
404c1c29 171 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(fModule);
9c7f5947 172 if(cal==0){
173 AliError(Form("Calibration object not present for SDD module %d\n",fModule));
174 return;
175 }
add58ef6 176 const Int_t kMaxBin=fNZbins*fNXbins;
04366a57 177 Int_t ncl=0;
178 TClonesArray &cl=*clusters;
add58ef6 179 for (Int_t s=0; s<2; s++){
180 for(Int_t iAnode=0; iAnode<GetSeg()->NpzHalf(); iAnode++){
181 if(anodeFired[s]->TestBitNumber(iAnode)==kFALSE) continue;
182 for(Int_t iTimeBin=0; iTimeBin<GetSeg()->Npx(); iTimeBin++){
183 Int_t index=(iTimeBin+1)*fNZbins+(iAnode+1);
184 if (bins[s][index].IsUsed()) continue;
185 if(NoiseSuppress(index,s,bins[s],cal)) continue;
186 Int_t idx[32]; UInt_t msk[32]; Int_t npeaks=0;
187 FindPeaks(index, fNZbins, bins[s], idx, msk, npeaks);
188
189 if (npeaks>30) continue;
190 if (npeaks==0) continue;
191
192 Int_t k,l;
d59a647b 193 Int_t nClust;
194 if(repa->GetUseUnfoldingInClusterFinderSDD()){
195 for (k=0; k<npeaks-1; k++){//mark adjacent peaks
196 if (idx[k] < 0) continue; //this peak is already removed
197 for (l=k+1; l<npeaks; l++) {
198 if (idx[l] < 0) continue; //this peak is already removed
199 Int_t ki=idx[k]/fNZbins, kj=idx[k] - ki*fNZbins;
200 Int_t li=idx[l]/fNZbins, lj=idx[l] - li*fNZbins;
201 Int_t di=TMath::Abs(ki - li);
202 Int_t dj=TMath::Abs(kj - lj);
203 if (di>1 || dj>1) continue;
204 if (bins[s][idx[k]].GetQ() > bins[s][idx[l]].GetQ()) {
205 msk[l]=msk[k];
206 idx[l]*=-1;
207 } else {
208 msk[k]=msk[l];
209 idx[k]*=-1;
210 break;
211 }
212 }
add58ef6 213 }
d59a647b 214 nClust=npeaks;
215 }else{
216 for (k=1; k<npeaks; k++) msk[k]=msk[0];
217 nClust=1;
add58ef6 218 }
d59a647b 219 Float_t maxADC=0;
add58ef6 220 for (k=0; k<npeaks; k++) {
d59a647b 221 if(idx[k]>0. && bins[s][idx[k]].GetQ() > maxADC) maxADC=bins[s][idx[k]].GetQ();
add58ef6 222 MarkPeak(TMath::Abs(idx[k]), fNZbins, bins[s], msk[k]);
f6b6d58e 223 }
d59a647b 224 if(maxADC<fCutOnPeakLoose) continue;
225
226 for (k=0; k<nClust; k++) {
add58ef6 227 if (idx[k] < 0) continue; //removed peak
228 AliITSRecPoint c;
229 MakeCluster(idx[k], fNZbins, bins[s], msk[k], c);
230 //mi change
231 Int_t milab[10];
232 for (Int_t ilab=0;ilab<10;ilab++){
233 milab[ilab]=-2;
234 }
add58ef6 235
d59a647b 236 if(digits) {
237 for (Int_t di=-2; di<=2;di++){
238 for (Int_t dj=-2;dj<=2;dj++){
239 index = idx[k]+di+dj*fNZbins;
240 if (index<0) continue;
241 if (index>=kMaxBin) continue;
242 AliBin *b=&bins[s][index];
7aea218a 243 if(b->GetQ()<0.1) continue;
d59a647b 244 AliITSdigitSDD* d=(AliITSdigitSDD*)digits->UncheckedAt(b->GetIndex());
245 for (Int_t itrack=0;itrack<10;itrack++){
246 Int_t track = (d->GetTracks())[itrack];
247 if (track>=0) {
248 AddLabel(milab, track);
f6b6d58e 249 }
250 }
251 }
252 }
6c8e94cf 253 }
254 else { // raw data
255 if (fRawID2ClusID) milab[0] = fNClusters+1; // RS: store clID+1 as a reference to the cluster
f6b6d58e 256 }
d59a647b 257
258
259 Int_t clSizAnode=fZmax-fZmin+1;
260 Int_t clSizTb=fXmax-fXmin+1;
add58ef6 261 if(repa->GetUseSDDClusterSizeSelection()){
262 if(clSizTb==1) continue; // cut common mode noise spikes
710d11ac 263 if(clSizAnode>5) continue; // cut common mode noise spikes
add58ef6 264 if(clSizTb>10) continue; // cut clusters on noisy anodes
d59a647b 265 if(cal-> IsAMAt20MHz() && clSizTb>8) continue; // cut clusters on noisy anodes
f6b6d58e 266 }
add58ef6 267
268 AliITSresponseSDD* rsdd = fDetTypeRec->GetResponseSDD();
269 Float_t y=c.GetY(),z=c.GetZ(), q=c.GetQ();
270 y/=q; z/=q;
271 Float_t zAnode=z-0.5; // to have anode in range 0.-255. and centered on the mid of the pitch
272 Float_t timebin=y-0.5; // to have time bin in range 0.-255. amd centered on the mid of the bin
273 if(s==1) zAnode += GetSeg()->NpzHalf(); // right side has anodes from 256. to 511.
274 Float_t zdet = GetSeg()->GetLocalZFromAnode(zAnode);
275 Float_t driftTimeUncorr = GetSeg()->GetDriftTimeFromTb(timebin)+jitter*rsdd->GetCarlosRXClockPeriod();
276 Float_t driftTime=driftTimeUncorr-rsdd->GetTimeZero(fModule);
d59a647b 277 if(driftTime<fMaxDrTimeForTightCut && maxADC<fCutOnPeakTight) continue;
278
e71a6286 279 Float_t driftSpeed = cal->GetDriftSpeedAtAnode(zAnode) + rsdd->GetDeltaVDrift(fModule,zAnode>255);
add58ef6 280 Float_t driftPathMicron = driftTime*driftSpeed;
281 const Double_t kMicronTocm = 1.0e-4;
282 Float_t xdet=(driftPathMicron-GetSeg()->Dx())*kMicronTocm; // xdet is negative
283 if (s==0) xdet=-xdet; // left side has positive local x
284
285 if(repa->GetUseSDDCorrectionMaps()){
286 Float_t corrx=0, corrz=0;
287 cal->GetCorrections(zdet,xdet,corrz,corrx,GetSeg());
288 zdet+=corrz;
289 xdet+=corrx;
290 }
291
292 Double_t loc[3]={xdet,0.,zdet},trk[3]={0.,0.,0.};
293 mT2L->MasterToLocal(loc,trk);
294 y=trk[1];
295 z=trk[2];
296
374200ee 297 q+=(driftTime*rsdd->GetADCvsDriftTime(fModule)); // correction for zero supp.
57019696 298 q/=rsdd->GetADCtokeV(fModule);
add58ef6 299 if(cal-> IsAMAt20MHz()) q*=2.; // account for 1/2 sampling freq.
300 if(q<repa->GetMinClusterChargeSDD()) continue; // remove noise clusters
301
4d350ec2 302 Float_t hit[6] = {y, z, 0.0030*0.0030, 0.0020*0.0020, q, 0.};
add58ef6 303 Int_t info[3] = {clSizTb, clSizAnode, fNlayer[fModule]};
304 if (digits) CheckLabels2(milab);
305 milab[3]=fNdet[fModule];
306 AliITSRecPoint cc(milab,hit,info);
d59a647b 307 cc.SetType(nClust*100+npeaks);
add58ef6 308 cc.SetDriftTime(driftTimeUncorr);
8f6140ad 309 cc.SetDriftSide(s);
d59a647b 310 cc.SetChargeRatio(maxADC);
add58ef6 311 if(clusters) new (cl[ncl]) AliITSRecPoint(cc);
312 else {
313 fDetTypeRec->AddRecPoint(cc);
314 }
6c8e94cf 315 fNClusters++; // RS
add58ef6 316 ncl++;
f6b6d58e 317 }
04366a57 318 }
319 }
add58ef6 320 }
d59a647b 321 AliDebug(2,Form("Clusters found on SDD module %d (unfolding %d) = %d\n",fModule,repa->GetUseUnfoldingInClusterFinderSDD(),ncl));
322
85bdbebe 323}
f6b6d58e 324//______________________________________________________________________
01ef1bd4 325void AliITSClusterFinderV2SDD::RawdataToClusters(AliRawReader* rawReader){
04366a57 326 //------------------------------------------------------------
327 // This function creates ITS clusters from raw data
328 //------------------------------------------------------------
6c8e94cf 329 fNClusters = 0; //RS
d9ed1779 330 AliITSRawStream* inputSDD=AliITSRawStreamSDD::CreateRawStreamSDD(rawReader);
331 AliDebug(1,Form("%s is used",inputSDD->ClassName()));
2f8ed7ab 332
979b5a5f 333 AliITSDDLModuleMapSDD *ddlmap=(AliITSDDLModuleMapSDD*)fDetTypeRec->GetDDLModuleMapSDD();
2f8ed7ab 334 inputSDD->SetDDLModuleMap(ddlmap);
83ec5e27 335 for(Int_t iddl=0; iddl<AliITSDDLModuleMapSDD::GetNDDLs(); iddl++){
336 for(Int_t icar=0; icar<AliITSDDLModuleMapSDD::GetNModPerDDL();icar++){
337 Int_t iMod=ddlmap->GetModuleNumber(iddl,icar);
338 if(iMod==-1) continue;
339 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iMod);
340 if(cal==0){
341 AliError(Form("Calibration object not present for SDD module %d\n",iMod));
342 continue;
343 }
253e68a0 344 Bool_t isZeroSupp=cal->GetZeroSupp();
345 if(isZeroSupp){
2f8ed7ab 346 for(Int_t iSid=0; iSid<2; iSid++) inputSDD->SetZeroSuppLowThreshold(iMod-240,iSid,cal->GetZSLowThreshold(iSid));
83ec5e27 347 }else{
2f8ed7ab 348 for(Int_t iSid=0; iSid<2; iSid++) inputSDD->SetZeroSuppLowThreshold(iMod-240,iSid,0);
83ec5e27 349 }
350 }
351 }
01ef1bd4 352 FindClustersSDD(inputSDD);
2f8ed7ab 353 delete inputSDD;
04366a57 354}
355
01ef1bd4 356void AliITSClusterFinderV2SDD::FindClustersSDD(AliITSRawStream* input)
04366a57 357{
358 //------------------------------------------------------------
359 // Actual SDD cluster finder for raw data
360 //------------------------------------------------------------
01ef1bd4 361 AliITSRecPointContainer* rpc = AliITSRecPointContainer::Instance();
04366a57 362 Int_t nClustersSDD = 0;
ae485645 363 AliBin *bins[2];
add58ef6 364 TBits* anodeFired[2];
365 TBits* ddlAnodeFired[kHybridsPerDDL];
366 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++){
367 ddlAnodeFired[iHyb]=new TBits(fNAnodes);
368 ddlAnodeFired[iHyb]->ResetAllBits();
369 }
de075dae 370 Int_t vectModId[kModulesPerDDL];
371 for(Int_t iMod=0; iMod<kModulesPerDDL; iMod++) vectModId[iMod]=-1;
372
04366a57 373 // read raw data input stream
6c8e94cf 374 int countRW = 0; //RS
375 if (fRawID2ClusID) fRawID2ClusID->Reset(); //RS if array was provided, we shall store the rawID -> ClusterID
376 //
14dceddf 377 while (input->Next()) {
e4da2288 378 Int_t iModule = input->GetModuleID();
93a93288 379 if(iModule<0){
380 AliWarning(Form("Invalid SDD module number %d\n", iModule));
381 continue;
382 }
6297cc01 383 Int_t iCarlos =input->GetCarlosId();
384 Int_t iSide = input->GetChannel();
14dceddf 385 Int_t iHybrid=iCarlos*2+iSide;
de075dae 386
14dceddf 387 if (input->IsCompletedModule()) {
de075dae 388 // store the module number
389 vectModId[iCarlos]=iModule;
390 }
391 else if (input->IsCompletedDDL()) {
392 // when all data from a DDL was read, search for clusters
393 Int_t jitter=input->GetJitter();
394 for(Int_t iMod=0; iMod<kModulesPerDDL; iMod++){
395 if(vectModId[iMod]>=0){
396 fModule = vectModId[iMod];
01ef1bd4 397 TClonesArray* clusters = rpc->UncheckedGetClusters(fModule);
add58ef6 398 bins[0]=fDDLBins[iMod*2]; // first hybrid of the module
399 bins[1]=fDDLBins[iMod*2+1]; // second hybrid of the module
400 anodeFired[0]=ddlAnodeFired[iMod*2];
401 anodeFired[1]=ddlAnodeFired[iMod*2+1];
01ef1bd4 402 FindClustersSDD(bins, anodeFired, NULL, clusters,jitter);
403 Int_t nClusters = clusters->GetEntriesFast();
de075dae 404 nClustersSDD += nClusters;
405 vectModId[iMod]=-1;
406 }
add58ef6 407 for (Int_t s=0; s<2; s++){
408 Int_t indexHyb=iMod*2+s;
409 for(Int_t iAnode=0; iAnode<GetSeg()->NpzHalf(); iAnode++){
410 if(ddlAnodeFired[indexHyb]->TestBitNumber(iAnode)==kFALSE) continue;
411 for(Int_t iTimeBin=0; iTimeBin<GetSeg()->Npx(); iTimeBin++){
412 Int_t index=(iTimeBin+1)*fNZbins+(iAnode+1);
413 fDDLBins[indexHyb][index].Reset();
414 }
415 }
de075dae 416 }
add58ef6 417 ddlAnodeFired[iMod*2]->ResetAllBits();
418 ddlAnodeFired[iMod*2+1]->ResetAllBits();
44c5b268 419 }
5dfa68c5 420 }else{
04366a57 421 // fill the current digit into the bins array
44c5b268 422 if(iHybrid<0 || iHybrid>=kHybridsPerDDL){
423 AliWarning(Form("Invalid SDD hybrid number %d on module %d\n", iHybrid,iModule));
424 continue;
425 }
e4da2288 426 AliITSCalibrationSDD* cal = (AliITSCalibrationSDD*)GetResp(iModule);
9c7f5947 427 if(cal==0){
428 AliError(Form("Calibration object not present for SDD module %d\n",iModule));
429 continue;
430 }
5683bd96 431 Float_t charge=input->GetSignal();
add58ef6 432 Int_t chan=input->GetCoord1()+fNAnodes*iSide;
75065a60 433 Float_t gain=cal->GetChannelGain(chan)/fDetTypeRec->GetAverageGainSDD();;
20f3f947 434 Float_t baseline = cal->GetBaseline(chan);
435 if(charge>baseline) charge-=baseline;
436 else charge=0;
9c7f5947 437 if(gain>0.){ // Bad channels have gain=0
438 charge/=gain;
439 if(charge>=cal->GetThresholdAnode(chan)) {
440 Int_t q=(Int_t)(charge+0.5);
441 Int_t iz = input->GetCoord1();
442 Int_t itb = input->GetCoord2();
add58ef6 443 Int_t index = (itb+1) * fNZbins + (iz+1);
444 if((itb < fNTimeBins) && (iz < fNAnodes)) {
445 fDDLBins[iHybrid][index].SetQ(q);
446 fDDLBins[iHybrid][index].SetMask(1);
447 fDDLBins[iHybrid][index].SetIndex(index);
6c8e94cf 448 fDDLBins[iHybrid][index].SetRawID(countRW); //RS register raw id
add58ef6 449 ddlAnodeFired[iHybrid]->SetBitNumber(iz);
9c7f5947 450 }else{
451 AliWarning(Form("Invalid SDD cell: Anode=%d TimeBin=%d",iz,itb));
452 }
93a93288 453 }
5dfa68c5 454 }
04366a57 455 }
6c8e94cf 456 countRW++; //RS
04366a57 457 }
add58ef6 458 for(Int_t iHyb=0;iHyb<kHybridsPerDDL;iHyb++){
459 delete ddlAnodeFired[iHyb];
460 }
3b1d8321 461 AliDebug(1,Form("found clusters in ITS SDD: %d", nClustersSDD));
04366a57 462}
463
e3ee4984 464//______________________________________________________________________
b34fed4e 465Bool_t AliITSClusterFinderV2SDD::NoiseSuppress(Int_t k, Int_t sid, AliBin* bins, const AliITSCalibrationSDD* cal) const {
e3ee4984 466 // applies zero suppression using the measured noise of each anode
467 // threshold values from ALICE-INT-1999-28 V10
2b025386 468 // returns kTRUE if the digit should eb noise suppressed, kFALSE if it should be kept
83ec5e27 469 Float_t xfactL=2.2;
470 Float_t xfactH=4.0;
e3ee4984 471 //
472
add58ef6 473 Int_t iAn=(k%fNZbins)-1;
2b025386 474 if(iAn<0 || iAn>255) return kTRUE;
e3ee4984 475 if(sid==1) iAn+=256;
476 Int_t nLow=0, nHigh=0;
477 Float_t noise=cal->GetNoiseAfterElectronics(iAn);
478 Float_t noisem1=noise;
479 if(iAn>1) noisem1=cal->GetNoiseAfterElectronics(iAn-1);
480 Float_t noisep1=noise;
481 if(iAn<511) noisep1=cal->GetNoiseAfterElectronics(iAn+1);
83ec5e27 482 Float_t tL=noise*xfactL;
483 Float_t tH=noise*xfactH;
484 Float_t tLp1=noisep1*xfactL;
485 Float_t tHp1=noisep1*xfactH;
486 Float_t tLm1=noisem1*xfactL;
487 Float_t tHm1=noisem1*xfactH;
2b025386 488 Int_t cC=bins[k].GetQ();
e3ee4984 489 if(cC<=tL){
490 bins[k].SetQ(0);
491 bins[k].SetMask(0xFFFFFFFE);
2b025386 492 return kTRUE;;
e3ee4984 493 }
494 nLow++; // cC is greater than tL
495 if(cC>tH) nHigh++;
496 Int_t sS=bins[k-1].GetQ();
497 if(sS>tLm1) nLow++;
498 if(sS>tHm1) nHigh++;
499 Int_t nN=bins[k+1].GetQ();
500 if(nN>tLp1) nLow++;
501 if(nN>tHp1) nHigh++;
add58ef6 502 Int_t eE=bins[k-fNZbins].GetQ();
e3ee4984 503 if(eE>tL) nLow++;
504 if(eE>tH) nHigh++;
add58ef6 505 Int_t wW=bins[k+fNZbins].GetQ();
e3ee4984 506 if(wW>tL) nLow++;
507 if(wW>tH) nHigh++;
ad98389f 508 if(nLow<2 || nHigh<1) return kTRUE;
2b025386 509 else return kFALSE;
e3ee4984 510}
511
04366a57 512
d97eb3fe 513