New, faster method for dEdx (Alexander/PerIvar)
[u/mrichter/AliRoot.git] / HLT / TPCLib / AliHLTTPCdEdxComponent.cxx
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0973c527 1// **************************************************************************
2// This file is property of and copyright by the ALICE HLT Project *
3// ALICE Experiment at CERN, All rights reserved. *
4// *
5// Primary Authors: Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de> *
6// for The ALICE HLT Project. *
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
18/// @file AliHLTTPCdEdxComponent.cxx
19/// @author Sergey Gorbunov <sergey.gorbunov@kip.uni-heidelberg.de>
20/// @date June 2009
21/// @brief An ITS tracker processing component for the HLT
22
23
24/////////////////////////////////////////////////////
25// //
26// dEdx calculation component for the HLT TPC //
27// //
28/////////////////////////////////////////////////////
29
30#include "AliHLTTPCdEdxComponent.h"
31#include "TStopwatch.h"
32#include "TMath.h"
33#include "AliCDBEntry.h"
34#include "AliCDBManager.h"
35#include "TObjString.h"
36#include "TObjArray.h"
37#include "AliHLTDataTypes.h"
38#include "AliHLTExternalTrackParam.h"
39#include "AliHLTGlobalBarrelTrack.h"
40#include "AliHLTTPCTransform.h"
41#include "AliHLTTPCSpacePointData.h"
42#include "AliHLTTPCClusterDataFormat.h"
43#include "AliHLTTPCTrackletDataFormat.h"
44#include "AliHLTTPCDefinitions.h"
45#include "AliTPCseed.h"
46#include "AliTPCclusterMI.h"
47#include "TGeoGlobalMagField.h"
0973c527 48
49
50/** ROOT macro for the implementation of ROOT specific class methods */
51ClassImp( AliHLTTPCdEdxComponent )
52AliHLTTPCdEdxComponent::AliHLTTPCdEdxComponent()
53 :
54 fSolenoidBz( 0 ),
55 fStatTime( 0 ),
56 fStatNEvents( 0 )
57{
58 // see header file for class documentation
59 // or
60 // refer to README to build package
61 // or
62 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
63 for( int i=0; i<fkNPatches; i++ ){
64 fPatchClusters[i] = 0;
65 fNPatchClusters[i] = 0;
66 }
67}
68
69AliHLTTPCdEdxComponent::AliHLTTPCdEdxComponent( const AliHLTTPCdEdxComponent& )
70 :
71 AliHLTProcessor(),
72 fSolenoidBz( 0 ),
73 fStatTime( 0 ),
74 fStatNEvents( 0 )
75{
4a76350f 76 // dummy
77 for( int i=0; i<fkNPatches; i++ ){
78 fPatchClusters[i] = 0;
79 fNPatchClusters[i] = 0;
80 }
0973c527 81 HLTFatal( "copy constructor untested" );
82}
83
84AliHLTTPCdEdxComponent& AliHLTTPCdEdxComponent::operator=( const AliHLTTPCdEdxComponent& )
85{
86 // see header file for class documentation
87 HLTFatal( "assignment operator untested" );
88 for( int i=0; i<fkNPatches; i++ ){
89 fPatchClusters[i] = 0;
90 fNPatchClusters[i] = 0;
91 }
92 return *this;
93}
94
95AliHLTTPCdEdxComponent::~AliHLTTPCdEdxComponent()
96{
97 // see header file for class documentation
98 for( int i=0; i<fkNPatches; i++ ){
99 delete[] fPatchClusters[i];
100 }
101}
102
103//
104// Public functions to implement AliHLTComponent's interface.
105// These functions are required for the registration process
106//
107
108const char* AliHLTTPCdEdxComponent::GetComponentID()
109{
110 // see header file for class documentation
111 return "TPCdEdx";
112}
113
114void AliHLTTPCdEdxComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list )
115{
116 // see header file for class documentation
117 list.clear();
118 list.push_back( kAliHLTDataTypeTrack|kAliHLTDataOriginTPC );
119 list.push_back( AliHLTTPCDefinitions::fgkClustersDataType );
120}
121
122AliHLTComponentDataType AliHLTTPCdEdxComponent::GetOutputDataType()
123{
124 // see header file for class documentation
125 return kAliHLTDataTypedEdx|kAliHLTDataOriginTPC;
126}
127
128void AliHLTTPCdEdxComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier )
129{
130 // define guess for the output data size
131 constBase = 200; // minimum size
132 inputMultiplier = 0.1; // size relative to input
133}
134
135AliHLTComponent* AliHLTTPCdEdxComponent::Spawn()
136{
137 // see header file for class documentation
138 return new AliHLTTPCdEdxComponent;
139}
140
141void AliHLTTPCdEdxComponent::SetDefaultConfiguration()
142{
143 // Set default configuration for the CA tracker component
144 // Some parameters can be later overwritten from the OCDB
145
146 fSolenoidBz = -5.00668;
147 fStatTime = 0;
148 fStatNEvents = 0;
149}
150
151int AliHLTTPCdEdxComponent::ReadConfigurationString( const char* arguments )
152{
153 // Set configuration parameters for the CA tracker component from the string
154
155 int iResult = 0;
156 if ( !arguments ) return iResult;
157
158 TString allArgs = arguments;
159 TString argument;
160 int bMissingParam = 0;
161
162 TObjArray* pTokens = allArgs.Tokenize( " " );
163
164 int nArgs = pTokens ? pTokens->GetEntries() : 0;
165
166 for ( int i = 0; i < nArgs; i++ ) {
167 argument = ( ( TObjString* )pTokens->At( i ) )->GetString();
168 if ( argument.IsNull() ) continue;
169
170 if ( argument.CompareTo( "-solenoidBz" ) == 0 ) {
171 if ( ( bMissingParam = ( ++i >= pTokens->GetEntries() ) ) ) break;
75970b8d 172 HLTWarning("argument -solenoidBz is deprecated, magnetic field set up globally (%f)", GetBz());
0973c527 173 continue;
174 }
175
176 HLTError( "Unknown option \"%s\"", argument.Data() );
177 iResult = -EINVAL;
178 }
179 delete pTokens;
180
181 if ( bMissingParam ) {
182 HLTError( "Specifier missed for parameter \"%s\"", argument.Data() );
183 iResult = -EINVAL;
184 }
185
186 return iResult;
187}
188
189
190int AliHLTTPCdEdxComponent::ReadCDBEntry( const char* cdbEntry, const char* chainId )
191{
192 // see header file for class documentation
193
194 const char* defaultNotify = "";
195
196 if ( !cdbEntry ) {
197 return 0;// need to add the HLT/ConfigTPC/TPCdEdx directory to cdb SG!!!
4a76350f 198 //cdbEntry = "HLT/ConfigTPC/TPCdEdx";
199 //defaultNotify = " (default)";
200 //chainId = 0;
0973c527 201 }
202
203 HLTInfo( "configure from entry \"%s\"%s, chain id %s", cdbEntry, defaultNotify, ( chainId != NULL && chainId[0] != 0 ) ? chainId : "<none>" );
204 AliCDBEntry *pEntry = AliCDBManager::Instance()->Get( cdbEntry );//,GetRunNo());
205
206 if ( !pEntry ) {
207 HLTError( "cannot fetch object \"%s\" from CDB", cdbEntry );
208 return -EINVAL;
209 }
210
211 TObjString* pString = dynamic_cast<TObjString*>( pEntry->GetObject() );
212
213 if ( !pString ) {
214 HLTError( "configuration object \"%s\" has wrong type, required TObjString", cdbEntry );
215 return -EINVAL;
216 }
217
218 HLTInfo( "received configuration object string: \"%s\"", pString->GetString().Data() );
219
220 return ReadConfigurationString( pString->GetString().Data() );
221}
222
223
224int AliHLTTPCdEdxComponent::Configure( const char* cdbEntry, const char* chainId, const char *commandLine )
225{
226 // Configure the component
227 // There are few levels of configuration,
228 // parameters which are set on one step can be overwritten on the next step
229
230 //* read hard-coded values
231
232 SetDefaultConfiguration();
233
234 //* read the default CDB entry
235
236 int iResult1 = ReadCDBEntry( NULL, chainId );
237
238 //* read magnetic field
239
75970b8d 240 fSolenoidBz=GetBz();
0973c527 241
242 //* read the actual CDB entry if required
243
4a76350f 244 int iResult2 = ( cdbEntry ) ? ReadCDBEntry( cdbEntry, chainId ) : 0;
0973c527 245
246 //* read extra parameters from input (if they are)
247
4a76350f 248 int iResult3 = 0;
0973c527 249
250 if ( commandLine && commandLine[0] != '\0' ) {
251 HLTInfo( "received configuration string from HLT framework: \"%s\"", commandLine );
4a76350f 252 iResult3 = ReadConfigurationString( commandLine );
0973c527 253 }
254
255 // Initialise the tracker here
256
4a76350f 257 return iResult1 ? iResult1 : ( iResult2 ? iResult2 : iResult3 );
0973c527 258}
259
260
261
262int AliHLTTPCdEdxComponent::DoInit( int argc, const char** argv )
263{
264 // Configure the component
265
266 TString arguments = "";
267 for ( int i = 0; i < argc; i++ ) {
268 if ( !arguments.IsNull() ) arguments += " ";
269 arguments += argv[i];
270 }
271
272 int ret = Configure( NULL, NULL, arguments.Data() );
273
6a725e52 274 // Check field
275 if (!TGeoGlobalMagField::Instance()) {
276 HLTError("magnetic field not initialized, please set up TGeoGlobalMagField and AliMagF");
277 return -ENODEV;
0973c527 278 }
279
280 //AliTPCTransform *transform = AliTPCcalibDB::Instance()->GetTransform();
281 //if( transform ){
282 //AliTPCRecoParam *reco = transform->GetCurrentRecoParam();
283 //if( ! reco ){
284 //reco = new AliTPCRecoParam;
285 //reco->SetUseTotalCharge(0);
286 //transform->SetCurrentRecoParam( reco );
287 //}
288
289 return ret;
290}
291
292
293int AliHLTTPCdEdxComponent::DoDeinit()
294{
295 // see header file for class documentation
296 return 0;
297}
298
299
300
301int AliHLTTPCdEdxComponent::Reconfigure( const char* cdbEntry, const char* chainId )
302{
303 // Reconfigure the component from OCDB .
304
305 return Configure( cdbEntry, chainId, NULL );
306}
307
308
309
310int AliHLTTPCdEdxComponent::DoEvent
311(
312 const AliHLTComponentEventData& evtData,
313 const AliHLTComponentBlockData* blocks,
314 AliHLTComponentTriggerData& /*trigData*/,
315 AliHLTUInt8_t* outputPtr,
316 AliHLTUInt32_t& size,
317 vector<AliHLTComponentBlockData>& outputBlocks )
318{
319 //* process the event
320
321 AliHLTUInt32_t maxBufferSize = size;
322 size = 0; // output size
323
324 if (!IsDataEvent()) return 0;
325
326 if ( evtData.fBlockCnt <= 0 ) {
327 HLTWarning( "no blocks in event" );
328 return 0;
329 }
330 if ( !outputPtr ) {
331 return -ENOSPC;
332 }
333
334 int iResult=0;
335
336 TStopwatch timer;
337
338 // Initialise the data pointers
339
340 for( int i=0; i<fkNPatches; i++ ){
341 delete[] fPatchClusters[i];
342 fPatchClusters[i] = 0;
343 fNPatchClusters[i] = 0;
344 }
345
346 int nBlocks = (int)evtData.fBlockCnt;
347
348 int nInputClusters = 0;
349 int nInputTracks = 0;
350
351 // first read all the clusters
352
353 for (int ndx=0; ndx<nBlocks && iResult>=0; ndx++) {
354 const AliHLTComponentBlockData* iter = blocks+ndx;
355 if ( iter->fDataType != AliHLTTPCDefinitions::fgkClustersDataType ) continue;
356 Int_t slice=AliHLTTPCDefinitions::GetMinSliceNr(iter->fSpecification);
357 Int_t patch=AliHLTTPCDefinitions::GetMinPatchNr(iter->fSpecification);
358 Int_t slicepatch=slice*6+patch;
4a76350f 359 if( slicepatch >= fkNPatches ){
0973c527 360 HLTWarning("Wrong header of TPC cluster data, slice %d, patch %d",
361 slice, patch );
362 continue;
363 }
364 AliHLTTPCClusterData* inPtrSP = ( AliHLTTPCClusterData* )( iter->fPtr );
365 nInputClusters += inPtrSP->fSpacePointCnt;
366
367 delete[] fPatchClusters[slicepatch];
368 fPatchClusters[slicepatch] = new AliTPCclusterMI[inPtrSP->fSpacePointCnt];
369 fNPatchClusters[slicepatch] = inPtrSP->fSpacePointCnt;
370
371 // create off-line clusters out of the HLT clusters
372 // todo: check which cluster information is really needed for the dEdx
373
374 for ( unsigned int i = 0; i < inPtrSP->fSpacePointCnt; i++ ) {
375 AliHLTTPCSpacePointData *chlt = &( inPtrSP->fSpacePoints[i] );
376 AliTPCclusterMI *c = fPatchClusters[slicepatch]+i;
377 c->SetX(chlt->fX);
378 c->SetY(chlt->fY);
379 c->SetZ(chlt->fZ);
380 c->SetSigmaY2(chlt->fSigmaY2);
381 c->SetSigmaYZ( 0 );
382 c->SetSigmaZ2(chlt->fSigmaZ2);
383 c->SetQ( chlt->fCharge );
384 c->SetMax( chlt->fQMax );
385 Int_t sector, row;
386 Float_t padtime[3]={0,chlt->fY,chlt->fZ};
387 AliHLTTPCTransform::Slice2Sector(slice,chlt->fPadRow, sector, row);
388 AliHLTTPCTransform::Local2Raw( padtime, sector, row);
389 c->SetDetector( sector );
390 c->SetRow( row );
391 c->SetPad( (Int_t) padtime[1] );
392 c->SetTimeBin( (Int_t) padtime[2] );
393 }
394 }
395
396
397 // loop over the input tracks: calculate dEdx and write output
398
399 unsigned int outSize = 0;
400 AliHLTFloat32_t *outPtr = ( AliHLTFloat32_t * )( outputPtr );
401
402 for (const AliHLTComponentBlockData* pBlock=GetFirstInputBlock(kAliHLTDataTypeTrack|kAliHLTDataOriginTPC);
403 pBlock!=NULL; pBlock=GetNextInputBlock()) {
404
405 AliHLTComponentBlockData outBlock;
406 FillBlockData( outBlock );
407 outBlock.fOffset = outSize;
408 outBlock.fSize = 0;
409 outBlock.fDataType = kAliHLTDataTypedEdx|kAliHLTDataOriginTPC;
410 outBlock.fSpecification = pBlock->fSpecification;
411
412 AliHLTTracksData* dataPtr = ( AliHLTTracksData* ) pBlock->fPtr;
413 int nTracks = dataPtr->fCount;
414 AliHLTExternalTrackParam* currTrack = dataPtr->fTracklets;
415 nInputTracks+=nTracks;
416
417 for( int itr=0;
418 itr<nTracks && ( (AliHLTUInt8_t *)currTrack < ((AliHLTUInt8_t *) pBlock->fPtr)+pBlock->fSize);
419 itr++ ){
420
421 // create an off-line track
422 AliHLTGlobalBarrelTrack gb(*currTrack);
423 AliTPCseed tTPC;
424 tTPC.Set( gb.GetX(), gb.GetAlpha(),
425 gb.GetParameter(), gb.GetCovariance() );
426
427 // set the clusters
428
26c0ed2d 429 for( UInt_t ic=0; ic<currTrack->fNPoints; ic++){
0973c527 430 UInt_t id = currTrack->fPointIDs[ic];
a371a266 431 int iSlice = AliHLTTPCSpacePointData::GetSlice(id);
432 int iPatch = AliHLTTPCSpacePointData::GetPatch(id);
433 int iCluster = AliHLTTPCSpacePointData::GetNumber(id);
0973c527 434 if( iSlice<0 || iSlice>36 || iPatch<0 || iPatch>5 ){
435 HLTError("Corrupted TPC cluster Id: slice %d, patch %d, cluster %d",
436 iSlice, iPatch,iCluster );
437 continue;
438 }
439 AliTPCclusterMI *patchClusters = fPatchClusters[iSlice*6 + iPatch];
440 if( !patchClusters ){
441 HLTError("Clusters are missed for slice %d, patch %d",
442 iSlice, iPatch );
443 continue;
444 }
445 if( iCluster >= fNPatchClusters[iSlice*6 + iPatch] ){
446 HLTError("TPC slice %d, patch %d: ClusterID==%d >= N Cluaters==%d ",
447 iSlice, iPatch,iCluster, fNPatchClusters[iSlice*6 + iPatch] );
448 continue;
449 }
450 AliTPCclusterMI *c = &(patchClusters[iCluster]);
451
452 int sec = c->GetDetector();
453 int row = c->GetRow();
454 if ( sec >= 36 ) {
455 row = row + AliHLTTPCTransform::GetNRowLow();
456 }
457 tTPC.SetClusterPointer( row, c );
458
459 AliTPCTrackerPoint &point = *( tTPC.GetTrackPoint( row ) );
3aba5bd4 460 tTPC.Propagate( TMath::DegToRad()*(sec%18*20.+10.), c->GetX(), fSolenoidBz );
0973c527 461 Double_t angle2 = tTPC.GetSnp()*tTPC.GetSnp();
462 angle2 = (angle2<1) ?TMath::Sqrt(angle2/(1-angle2)) :10.;
463 point.SetAngleY( angle2 );
464 point.SetAngleZ( tTPC.GetTgl() );
465 }
466
467 // Cook dEdx
468
72a916d9 469 if( outSize+3*sizeof( AliHLTFloat32_t ) > maxBufferSize ){
0973c527 470 HLTWarning( "Output buffer size %d exceed", maxBufferSize );
471 iResult = -ENOSPC;
472 break;
473 }
72a916d9 474
1adaacf9 475 //Old method
476 /*
72a916d9 477 tTPC.CookdEdx( 0.02, 0.6 );
478 outPtr[0] = tTPC.GetdEdx();
479 outPtr[1] = tTPC.GetSDEDX(0);
480 outPtr[2] = tTPC.GetNCDEDX(0);
1adaacf9 481 */
482
483 //New method
484 outPtr[0] = tTPC.CookdEdxAnalytical(0.02,0.6,1,0,159,0);
485 outPtr[1] = 0.;
486 outPtr[2] = 159;
487
72a916d9 488 outPtr+=3;
489 outSize+=3*sizeof( AliHLTFloat32_t );
490 outBlock.fSize+=3*sizeof( AliHLTFloat32_t );
0973c527 491
492 unsigned int step = sizeof( AliHLTExternalTrackParam ) + currTrack->fNPoints * sizeof( unsigned int );
493 currTrack = ( AliHLTExternalTrackParam* )( (( Byte_t * )currTrack) + step );
494 }
495 if( iResult<0 ) break;
496 outputBlocks.push_back( outBlock );
497 size = outSize;
498 }
499
500 timer.Stop();
501 fStatTime += timer.RealTime();
502 fStatNEvents++;
503
504 // Set log level to "Warning" for on-line system monitoring
505 int hz = ( int ) ( fStatTime > 1.e-10 ? fStatNEvents / fStatTime : 100000 );
506
507 HLTInfo( "TPCdEdx : %d clusters and %d tracks processed; average time %d Hz",
508 nInputClusters, nInputTracks, hz );
509
510 return iResult;
511}