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[u/mrichter/AliRoot.git] / TRD / AliTRDReconstructor.cxx
index 67692e5..df5eb5c 100644 (file)
 /**************************************************************************
- * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
- *                                                                        *
- * Author: The ALICE Off-line Project.                                    *
- * Contributors are mentioned in the code where appropriate.              *
- *                                                                        *
- * Permission to use, copy, modify and distribute this software and its   *
- * documentation strictly for non-commercial purposes is hereby granted   *
- * without fee, provided that the above copyright notice appears in all   *
- * copies and that both the copyright notice and this permission notice   *
- * appear in the supporting documentation. The authors make no claims     *
- * about the suitability of this software for any purpose. It is          *
- * provided "as is" without express or implied warranty.                  *
- **************************************************************************/
+* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
+*                                                                        *
+* Author: The ALICE Off-line Project.                                    *
+* Contributors are mentioned in the code where appropriate.              *
+*                                                                        *
+* Permission to use, copy, modify and distribute this software and its   *
+* documentation strictly for non-commercial purposes is hereby granted   *
+* without fee, provided that the above copyright notice appears in all   *
+* copies and that both the copyright notice and this permission notice   *
+* appear in the supporting documentation. The authors make no claims     *
+* about the suitability of this software for any purpose. It is          *
+* provided "as is" without express or implied warranty.                  *
+**************************************************************************/
 
 /* $Id$ */
 
 ///////////////////////////////////////////////////////////////////////////////
 //                                                                           //
 // Class for TRD reconstruction                                              //
+//                                                                           //   
+// For the special options which can be used during reconstruction and their //
+//  default values pls. see function SetOption().                            //
 //                                                                           //
 ///////////////////////////////////////////////////////////////////////////////
 
-#include <TFile.h>
 #include <TObjString.h>
 #include <TObjArray.h>
-#include <TClonesArray.h>
+#include <TTreeStream.h>
+#include <TDirectory.h>
+#include <TRef.h>
 
-#include "AliRunLoader.h"
 #include "AliRawReader.h"
 #include "AliLog.h"
-#include "AliESDTrdTrack.h"
-#include "AliESDEvent.h"
 
 #include "AliTRDReconstructor.h"
 #include "AliTRDclusterizer.h"
-#include "AliTRDtracker.h"
-#include "AliTRDpidESD.h"
-#include "AliTRDgtuTrack.h"
 #include "AliTRDrawData.h"
+#include "AliTRDrawStream.h"
 #include "AliTRDdigitsManager.h"
 #include "AliTRDtrackerV1.h"
-#include "AliTRDrecoParam.h"
+#include "AliESDEvent.h"
+#include "AliESDTrdTrack.h"
+#include "AliESDTrdTracklet.h"
+#include "AliESDTrdTrigger.h"
+#include "AliTRDtrackletWord.h"
+
+#define SETFLG(n,f) ((n) |= f)
+#define CLRFLG(n,f) ((n) &= ~f)
 
 ClassImp(AliTRDReconstructor)
 
-TClonesArray *AliTRDReconstructor::fgClusters = 0x0;
+AliESDTrdTrigger AliTRDReconstructor::fgTriggerFlags;
+TClonesArray *AliTRDReconstructor::fgClusters = NULL;
+TClonesArray *AliTRDReconstructor::fgTracklets = NULL;
+TClonesArray *AliTRDReconstructor::fgTracks = NULL;
+Char_t const * AliTRDReconstructor::fgSteerNames[kNsteer] = {
+  "DigitsConversion       "
+ ,"Write Clusters         "
+ ,"Write Online Tracklets "
+ ,"Stand Alone Tracking   "
+ ,"HLT Mode              "
+ ,"Process Online Trklts  "
+ ,"Debug Streaming       "
+ ,"Cl. Radial Correction  "
+};
+Char_t const * AliTRDReconstructor::fgSteerFlags[kNsteer] = {
+  "dc"// digits conversion [false]
+ ,"cw"// write clusters [true]
+ ,"tw"// write online tracklets [false]
+ ,"sa"// track seeding (stand alone tracking) [true]
+ ,"hlt"// HLT reconstruction [false]
+ ,"tp"// also use online tracklets for reconstruction [false]
+ ,"deb"// Write debug stream [false]
+ ,"cc" // Cluster radial correction during reconstruction [false]
+};
+Char_t const * AliTRDReconstructor::fgTaskNames[AliTRDrecoParam::kTRDreconstructionTasks] = {
+  "Clusterizer"
+ ,"Tracker"
+ ,"PID"
+};
+Char_t const * AliTRDReconstructor::fgTaskFlags[AliTRDrecoParam::kTRDreconstructionTasks] = {
+  "cl"
+ ,"tr"
+ ,"pd"
+};
+Int_t AliTRDReconstructor::fgNTimeBins = -1;
+const  Float_t  AliTRDReconstructor::fgkMinClustersInTrack =  0.5;  //
+const  Float_t  AliTRDReconstructor::fgkLabelFraction      =  0.8;  //
+const  Double_t AliTRDReconstructor::fgkMaxChi2            = 12.0;  //
+const  Double_t AliTRDReconstructor::fgkMaxSnp             =  0.95; // Maximum local sine of the azimuthal angle
+const  Double_t AliTRDReconstructor::fgkMaxStep            =  2.0;  // Maximal step size in propagation
+const Double_t  AliTRDReconstructor::fgkEpsilon            = 1.e-5;                  // Precision of radial coordinate
+
 //_____________________________________________________________________________
 AliTRDReconstructor::AliTRDReconstructor()
   :AliReconstructor()
-  ,fSteerParam(0x00000007)
+  ,fSteerParam(0)
+  ,fClusterizer(NULL)
 {
-  //
-  // Default constructor
-  //
-
-  memset(fStreamLevel, 0, 5*sizeof(UChar_t));
-  // Xe tail cancellation parameters
-  fTCParams[0] = 1.156; // r1
-  fTCParams[1] = 0.130; // r2
-  fTCParams[2] = 0.114; // c1
-  fTCParams[3] = 0.624; // c2
-  // Ar tail cancellation parameters
-  fTCParams[4] = 6.;    // r1
-  fTCParams[5] = 0.62;  // r2
-  fTCParams[6] = 0.0087;// c1
-  fTCParams[7] = 0.07;  // c2
-
-}
-
-//_____________________________________________________________________________
-AliTRDReconstructor::AliTRDReconstructor(const AliTRDReconstructor &r)
-  :AliReconstructor(r)
-  ,fSteerParam(r.fSteerParam)
-{
-  //
-  // Copy constructor
-  //
-
-  memcpy(fStreamLevel,r.fStreamLevel, 5*sizeof(UChar_t));
-  memcpy(fTCParams   ,r.fTCParams   , 8*sizeof(Double_t));
-
+  // setting default "ON" steering parameters
+  // owner of debug streamers 
+  SETFLG(fSteerParam, kOwner);
+  // write clusters [cw]
+  SETFLG(fSteerParam, kWriteClusters);
+  // track seeding (stand alone tracking) [sa]
+  //SETFLG(fSteerParam, kSeeding);
+  // Cluster radial correction during reconstruction [cc]
+  //SETFLG(fSteerParam, kClRadialCorr);
+  memset(fDebugStream, 0, sizeof(TTreeSRedirector *) * AliTRDrecoParam::kTRDreconstructionTasks);
 }
 
 //_____________________________________________________________________________
@@ -90,42 +118,65 @@ AliTRDReconstructor::~AliTRDReconstructor()
   //
 
   if(fgClusters) {
-    fgClusters->Delete(); delete fgClusters;
+    fgClusters->Delete();
+    delete fgClusters;
+    fgClusters = NULL;
+  }
+  if(fgTracklets) {
+    fgTracklets->Delete();
+    delete fgTracklets;
+    fgTracklets = NULL;
+  }
+  if(fgTracks) {
+    fgTracks->Delete();
+    delete fgTracks;
+    fgTracks = NULL;
+  }
+  if(fSteerParam&kOwner){
+    for(Int_t itask = 0; itask < AliTRDrecoParam::kTRDreconstructionTasks; itask++)
+      if(fDebugStream[itask]) delete fDebugStream[itask];
+  }
+  if(fClusterizer){
+    delete fClusterizer;
+    fClusterizer = NULL;
   }
-
 }
 
+
 //_____________________________________________________________________________
-void AliTRDReconstructor::Init()
-{
+void AliTRDReconstructor::Init(){
   //
   // Init Options
   //
-
   SetOption(GetOption());
+  Options(fSteerParam);
 
-  AliInfo("TRD reconstruction will use the following settings:");
-  printf("\tWrite Clusters         [cw] : %s\n", fSteerParam&kWriteClusters?"yes":"no");
-  printf("\tWrite Online Tracklets [tw] : %s\n", fSteerParam&kWriteTracklets?"yes":"no");
-  printf("\tDrift Gas Argon        [ar] : %s\n", fSteerParam&kDriftGas?"yes":"no");
-  printf("\tStand Alone Tracking   [sa] : %s\n", fSteerParam&kSeeding?"yes":"no");
-  printf("\tHLT         Tracking  [hlt] : %s\n", fSteerParam&kHLT?"yes":"no");
-  printf("\tNN PID                 [nn] : %s\n", fSteerParam&kSteerPID?"yes":"no");
-  printf("\tStreaming Levels            : Clusterizer[%d] Tracker[%d] PID[%d]\n"
-        ,fStreamLevel[kClusterizer]
-        ,fStreamLevel[kTracker]
-        ,fStreamLevel[kPID]);
-
+  if(!fClusterizer){
+    fClusterizer = new AliTRDclusterizer(fgTaskNames[AliTRDrecoParam::kClusterizer], fgTaskNames[AliTRDrecoParam::kClusterizer]);
+    fClusterizer->SetReconstructor(this);
+  }
+  
+  // Make Debug Streams when Debug Streaming
+  if(IsDebugStreaming()){
+    for(Int_t task = 0; task < AliTRDrecoParam::kTRDreconstructionTasks; task++){
+      TDirectory *savedir = gDirectory;
+      fDebugStream[task] = new TTreeSRedirector(Form("TRD.Debug%s.root", fgTaskNames[task]));
+      savedir->cd();
+      SETFLG(fSteerParam, kOwner);
+    }
+  }
 }
 
 //_____________________________________________________________________________
 void AliTRDReconstructor::ConvertDigits(AliRawReader *rawReader
-                                     , TTree *digitsTree) const
+              , TTree *digitsTree) const
 {
   //
   // Convert raw data digits into digit objects in a root tree
   //
 
+  //AliInfo("Convert raw data digits into digit objects [RawReader -> Digit TTree]");
+
   AliTRDrawData rawData;
   rawReader->Reset();
   rawReader->Select("TRD");
@@ -134,6 +185,17 @@ void AliTRDReconstructor::ConvertDigits(AliRawReader *rawReader
   manager->WriteDigits();
   delete manager;
 
+  // take over ownership of online tracklets
+  fgTracklets = rawData.TrackletsArray();
+  rawData.SetTrackletsOwner(0x0);
+
+  // take over GTU tracks
+  fgTracks = rawData.TracksArray();
+  rawData.SetTracksOwner(0x0);
+
+  for (Int_t iSector = 0; iSector < 18; iSector++) {
+    fgTriggerFlags.SetFlags(iSector, rawData.GetTriggerFlags(iSector));
+  }
 }
 
 //_____________________________________________________________________________
@@ -144,22 +206,42 @@ void AliTRDReconstructor::Reconstruct(AliRawReader *rawReader
   // Reconstruct clusters
   //
 
+  //AliInfo("Reconstruct TRD clusters from RAW data [RawReader -> Cluster TTree]");
+
+
   rawReader->Reset();
   rawReader->Select("TRD");
 
-  // New (fast) cluster finder
-  AliTRDclusterizer clusterer("clusterer","TRD clusterizer");
-  clusterer.SetReconstructor(this);
-  clusterer.OpenOutput(clusterTree);
-  clusterer.SetAddLabels(kFALSE);
-  clusterer.Raw2ClustersChamber(rawReader);
+  if(!fClusterizer){
+    AliFatal("Clusterizer not available!");
+    return;
+  }
+
+  fClusterizer->ResetRecPoints();
+
+  fClusterizer->OpenOutput(clusterTree);
+  fClusterizer->SetUseLabels(kFALSE);
+  fClusterizer->Raw2ClustersChamber(rawReader);
   
+  fgNTimeBins = fClusterizer->GetNTimeBins();
+  
+  // take over ownership of online tracklets
+  fgTracklets = fClusterizer->TrackletsArray();
+  fClusterizer->SetTrackletsOwner(kFALSE);
+
+  // take over GTU tracks
+  fgTracks = fClusterizer->TracksArray();
+  fClusterizer->SetTracksOwner(kFALSE);
+
+  for (Int_t iSector = 0; iSector < 18; iSector++) {
+    fgTriggerFlags.SetFlags(iSector, fClusterizer->GetTriggerFlags(iSector));
+  }
+
   if(IsWritingClusters()) return;
 
   // take over ownership of clusters
-  fgClusters = clusterer.RecPoints();
-  clusterer.SetClustersOwner(kFALSE);
-
+  fgClusters = fClusterizer->RecPoints();
+  fClusterizer->SetClustersOwner(kFALSE);
 }
 
 //_____________________________________________________________________________
@@ -170,18 +252,33 @@ void AliTRDReconstructor::Reconstruct(TTree *digitsTree
   // Reconstruct clusters
   //
 
-  AliTRDclusterizer clusterer("clusterer","TRD clusterizer");
+  //AliInfo("Reconstruct TRD clusters from Digits [Digit TTree -> Cluster TTree]");
+  
+  AliTRDclusterizer clusterer(fgTaskNames[AliTRDrecoParam::kClusterizer], fgTaskNames[AliTRDrecoParam::kClusterizer]);
   clusterer.SetReconstructor(this);
   clusterer.OpenOutput(clusterTree);
   clusterer.ReadDigits(digitsTree);
   clusterer.MakeClusters();
 
+  // read tracklets and tracks if not done during reading of raw data
+  if (!fgTracklets) {
+    clusterer.ReadTracklets();
+    fgTracklets = clusterer.TrackletsArray();
+    clusterer.SetTrackletsOwner(kFALSE);
+  }
+  if (!fgTracks) {
+    clusterer.ReadTracks();
+    fgTracks = clusterer.TracksArray();
+    clusterer.SetTracksOwner(kFALSE);
+  }
+
+  fgNTimeBins = clusterer.GetNTimeBins();
+
   if(IsWritingClusters()) return;
 
   // take over ownership of clusters
   fgClusters = clusterer.RecPoints();
   clusterer.SetClustersOwner(kFALSE);
-
 }
 
 //_____________________________________________________________________________
@@ -200,13 +297,133 @@ AliTracker *AliTRDReconstructor::CreateTracker() const
 
 //_____________________________________________________________________________
 void AliTRDReconstructor::FillESD(TTree* /*digitsTree*/
-                               , TTree* /*clusterTree*/
-                               , AliESDEvent* /*esd*/) const
+        , TTree* /*clusterTree*/
+        , AliESDEvent* esd) const
 {
   //
   // Fill ESD
   //
 
+  // ----- filling tracklets -----
+  Int_t trackletIndex[1080] = { 0 };
+  AliDebug(1, Form("Filling tracklets from %p (%i)",
+                  fgTracklets, fgTracklets ? fgTracklets->GetEntriesFast() : 0));
+  if (fgTracklets) {
+    Int_t nTracklets = fgTracklets->GetEntriesFast();
+
+    Int_t lastHC = -1;
+    for (Int_t iTracklet = 0; iTracklet < nTracklets; iTracklet++) {
+      AliTRDtrackletBase *trkl = (AliTRDtrackletBase*) ((*fgTracklets)[iTracklet]);
+      Int_t hc = trkl->GetHCId();
+      //      hc += trkl->GetY() > 0 ? 1 : 0;
+      if ((hc < 0) || (hc >= 1080)) {
+       AliError(Form("HC for tracklet: 0x%08x out of range: %i", trkl->GetTrackletWord(), trkl->GetHCId()));
+       continue;
+      }
+      AliDebug(5, Form("hc: %4i : 0x%08x z: %2i", hc, trkl->GetTrackletWord(), trkl->GetZbin()));
+      if (hc != lastHC) {
+       AliDebug(2, Form("set tracklet index for HC %i to %i", hc, iTracklet));
+       trackletIndex[hc] = iTracklet + 1;
+       lastHC = hc;
+      }
+    }
+
+    for (Int_t iDet = 0; iDet < 540; iDet++) {
+      Int_t trklIndexA = trackletIndex[2*iDet + 0] - 1;
+      Int_t trklIndexB = trackletIndex[2*iDet + 1] - 1;
+      Int_t trklIndex  = esd->GetNumberOfTrdTracklets();
+      AliTRDtrackletBase *trklA = trklIndexA > -1 ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexA]) : 0x0;
+      AliTRDtrackletBase *trklB = trklIndexB > -1 ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexB]) : 0x0;
+      while (trklA != 0x0 || trklB != 0x0) {
+       AliDebug(5, Form("det %i - A: %i/%i -> %p, B: %i/%i -> %p",
+                        iDet, trklIndexA, nTracklets, trklA, trklIndexB, nTracklets, trklB));
+       if (trklA == 0x0) {
+         AliESDTrdTracklet esdTracklet(trklB->GetTrackletWord(), trklB->GetHCId());
+         esd->AddTrdTracklet(&esdTracklet);
+         trklIndexB++;
+         trklB = trklIndexB < nTracklets ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexB]) : 0x0;
+         if (trklB && trklB->GetHCId() != 2*iDet + 1)
+           trklB = 0x0;
+       }
+       else if (trklB == 0x0) {
+         AliESDTrdTracklet esdTracklet(trklA->GetTrackletWord(), trklA->GetHCId());
+         esd->AddTrdTracklet(&esdTracklet);
+         trklIndexA++;
+         trklA = trklIndexA < nTracklets ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexA]) : 0x0;
+         if (trklA && trklA->GetHCId() != 2*iDet)
+           trklA = 0x0;
+       }
+       else {
+         if ((trklA->GetZbin() < trklB->GetZbin()) ||
+             ((trklA->GetZbin() == trklB->GetZbin()) && (trklA->GetYbin() < trklB->GetYbin()))) {
+           AliESDTrdTracklet esdTracklet(trklA->GetTrackletWord(), trklA->GetHCId());
+           esd->AddTrdTracklet(&esdTracklet);
+           trklIndexA++;
+           trklA = trklIndexA < nTracklets ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexA]) : 0x0;
+           if (trklA && trklA->GetHCId() != 2*iDet)
+             trklA = 0x0;
+         }
+         else {
+           AliESDTrdTracklet esdTracklet(trklB->GetTrackletWord(), trklB->GetHCId());
+           esd->AddTrdTracklet(&esdTracklet);
+           trklIndexB++;
+           trklB = trklIndexB < nTracklets ? (AliTRDtrackletBase*) ((*fgTracklets)[trklIndexB]) : 0x0;
+           if (trklB && trklB->GetHCId() != 2*iDet + 1)
+             trklB = 0x0;
+         }
+       }
+      }
+      // updating tracklet indices as in ESD
+      if (esd->GetNumberOfTrdTracklets() != trklIndex) {
+       trackletIndex[2*iDet + 0] = trackletIndex[2*iDet + 1] = trklIndex;
+      }
+      else
+       trackletIndex[2*iDet + 0] = trackletIndex[2*iDet + 1] = -1;
+    }
+  }
+
+  // ----- filling GTU tracks -----
+  AliDebug(1, Form("Now filling ESD with GTU tracks from %p (%i)",
+                  fgTracks, fgTracks ? fgTracks->GetEntriesFast() : 0));
+  if (fgTracks) {
+    for (Int_t iTrack = 0; iTrack < fgTracks->GetEntriesFast(); iTrack++) {
+      AliESDTrdTrack *trdTrack = (AliESDTrdTrack*) ((*fgTracks)[iTrack]);
+
+      UInt_t mask  = trdTrack->GetLayerMask();
+      UInt_t stack = trdTrack->GetStack();
+
+      for (Int_t iLayer = 0; iLayer < 6; iLayer++) {
+       if (mask & (1 << iLayer)) {
+
+         Int_t det = trdTrack->GetSector()*30 + stack*6 + iLayer;
+         Int_t idx = trdTrack->GetTrackletIndex(iLayer);
+
+         if ((det < 0) || (det > 539)) {
+           AliError(Form("Invalid detector no. from track: %i", 2*det));
+           continue;
+         }
+         if (trackletIndex[2*det] >= 0) {
+           if ((trackletIndex[2*det] + idx > -1) &&
+               (trackletIndex[2*det] + idx < esd->GetNumberOfTrdTracklets())) {
+             AliESDTrdTracklet *trkl = esd->GetTrdTracklet(trackletIndex[2*det] + idx);
+             if (trkl) {
+               AliDebug(5, Form("adding tracklet: 0x%08x", trkl->GetTrackletWord()));
+               trdTrack->AddTrackletReference(trkl, iLayer);
+             }
+           }
+         }
+       }
+      }
+      // only add the track when it's complete (including tracklet references)
+      esd->AddTrdTrack(trdTrack);
+    }
+  }
+
+  esd->SetTrdTrigger(&fgTriggerFlags);
+
+  // clearing variables for next event
+  fgTracklets = 0x0;
+  fgTracks = 0x0;
 }
 
 //_____________________________________________________________________________
@@ -215,78 +432,49 @@ void AliTRDReconstructor::SetOption(Option_t *opt)
   //
   // Read option string into the steer param.
   //
-  // Default steer param values
-  //
-  // write clusters [cw] = true
-  // track seeding (stand alone tracking) [sa] = true
-  // PID method in reconstruction (NN) [nn] = true
-  // write online tracklets [tw] = false
-  // drift gas [ar] = false
-  // HLT tracking [hlt] = false
+  // The following string options are available during reconstruction.
+  // In square brackets the default values are given.
+  //   "dc"  : digits conversion [false]
+  //   "cw"  : write clusters [true]
+  //   "tw"  : write online tracklets [false]
+  //   "sa"  : track seeding (stand alone tracking) [true]
+  //   "hlt" : HLT reconstruction [false]
+  //   "tp"  : also use online tracklets for reconstruction [false]
+  //   "deb" : Write debug stream [false]
+  //   "cc"  : Cluster radial correction during reconstruction [false]
   //
+  // To check the actual options used during reconstruction include the following line in your rec.C script
+  // AliLog::SetClassDebugLevel("AliTRDReconstructor", 1);
 
-  fSteerParam = 0x00000007;
+  AliReconstructor::SetOption(opt);
 
   TString s(opt);
   TObjArray *opar = s.Tokenize(",");
   for(Int_t ipar=0; ipar<opar->GetEntriesFast(); ipar++){
+    Bool_t processed = kFALSE;
     TString sopt(((TObjString*)(*opar)[ipar])->String());
-    if(sopt.Contains("!cw")){ 
-      fSteerParam &= ~kWriteClusters;
-      continue;
-    } else if(sopt.Contains("!sa")){
-      fSteerParam &= ~kSeeding;
-      continue;
-    } else if(sopt.Contains("!nn")){
-      fSteerParam &= ~kSteerPID;
-      continue;
-    } else if(sopt.Contains("tw")){
-      if(!sopt.Contains("!")) fSteerParam |= kWriteTracklets;
-      continue;        
-    } else if(sopt.Contains("ar")){
-      if(!sopt.Contains("!")) fSteerParam |= kDriftGas;
-      continue;        
-    } else if(sopt.Contains("hlt")){
-      if(!sopt.Contains("!")) fSteerParam |= kHLT;
-      continue;        
-    } else if(sopt.Contains("sl")){
-       TObjArray *stl = sopt.Tokenize("_");
-       if(stl->GetEntriesFast() < 3) continue;
-                       TString taskstr(((TObjString*)(*stl)[1])->String());
-                       TString levelstring(((TObjString*)(*stl)[2])->String());
-       // Set the stream Level
-       Int_t level = levelstring.Atoi();
-       AliTRDReconstructorTask task = kTracker;
-       if(taskstr.CompareTo("cl") == 0) task = kClusterizer;   
-       else if(taskstr.CompareTo("tr") == 0) task = kTracker;
-       else if(taskstr.CompareTo("pi") == 0) task = kPID;
-       SetStreamLevel(level, task);
-       continue;
-               }
+    for(Int_t iopt=0; iopt<kNsteer; iopt++){
+      if(!sopt.Contains(fgSteerFlags[iopt])) continue;
+      SETFLG(fSteerParam, BIT(iopt));
+      if(sopt.Contains("!")) CLRFLG(fSteerParam, BIT(iopt));
+      processed = kTRUE;
+      break;   
+    }
+    if(processed) continue;
+
+    AliWarning(Form("Unknown option flag %s.", sopt.Data()));
   }
-
 }
 
 //_____________________________________________________________________________
-void AliTRDReconstructor::SetStreamLevel(Int_t level, AliTRDReconstructorTask task)
+void AliTRDReconstructor::Options(UInt_t steer)
 {
   //
-  // Set the Stream Level for one of the tasks Clusterizer, Tracker or PID
+  // Print the options
   //
 
-  TString taskname;
-  switch(task) {
-    case kClusterizer: 
-      taskname = "Clusterizer";
-      break;
-    case kTracker: 
-      taskname = "Tracker";
-      break;
-    case kPID: 
-      taskname = "PID";
-      break;
+  for(Int_t iopt=0; iopt<kNsteer; iopt++){
+    AliDebugGeneral("AliTRDReconstructor", 1, Form(" %s[%s]%s", fgSteerNames[iopt], fgSteerFlags[iopt], steer ?(((steer>>iopt)&1)?" : ON":" : OFF"):""));
   }
-
-  fStreamLevel[(Int_t)task] = level;
-
 }
+