3 /**************************************************************************
4 * This file is property of and copyright by the ALICE HLT Project *
5 * ALICE Experiment at CERN, All rights reserved. *
7 * Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no> *
8 * Timm Steinbeck <timm@kip.uni-heidelberg.de> *
9 * for The ALICE HLT Project. *
11 * Permission to use, copy, modify and distribute this software and its *
12 * documentation strictly for non-commercial purposes is hereby granted *
13 * without fee, provided that the above copyright notice appears in all *
14 * copies and that both the copyright notice and this permission notice *
15 * appear in the supporting documentation. The authors make no claims *
16 * about the suitability of this software for any purpose. It is *
17 * provided "as is" without express or implied warranty. *
18 **************************************************************************/
20 /** @file AliHLTDummyComponent.cxx
21 @author Timm Steinbeck, Matthias Richter
23 @brief A dummy processing component for the HLT. */
25 // see header file for class documentation
27 // refer to README to build package
29 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
31 #include "AliHLTSystem.h"
32 #include "AliHLTDummyComponent.h"
33 #include "AliHLTDefinitions.h"
39 /** ROOT macro for the implementation of ROOT specific class methods */
40 ClassImp(AliHLTDummyComponent)
42 AliHLTDummyComponent::AliHLTDummyComponent()
44 fOutputPercentage(100) // By default we copy to the output exactly what we got as input
46 // see header file for class documentation
48 // refer to README to build package
50 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
53 AliHLTDummyComponent::~AliHLTDummyComponent()
55 // see header file for class documentation
58 const char* AliHLTDummyComponent::GetComponentID()
60 // see header file for class documentation
61 return "Dummy"; // The ID of this component
64 void AliHLTDummyComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list)
66 // see header file for class documentation
67 list.push_back(kAliHLTAnyDataType); // We do not have any requirements for our input data type(s).
71 AliHLTComponentDataType AliHLTDummyComponent::GetOutputDataType()
73 // see header file for class documentation
74 /* in order to be backward compatible we have to keep the old code, at
75 * least for a while. Remember to use the new const kAliHLTVoidDataType
76 * if you are using a more recent AliRoot version (from Jan 07)
77 return kAliHLTVoidDataType;
79 AliHLTComponentDataType dt =
80 { sizeof(AliHLTComponentDataType),
81 {'\0','\0','\0','0','\0','\0','\0','\0'},
82 {'\0','\0','\0','\0'}};
86 void AliHLTDummyComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier )
88 // see header file for class documentation
90 inputMultiplier = ((double)fOutputPercentage)/100.0;
95 // Spawn function, return new instance of this class
96 AliHLTComponent* AliHLTDummyComponent::Spawn()
98 // see header file for class documentation
99 return new AliHLTDummyComponent;
102 int AliHLTDummyComponent::DoInit( int argc, const char** argv )
104 // perform initialization. We check whether our relative output size is specified in the arguments.
105 fOutputPercentage = 100;
110 HLTDebug("argv[%d] == %s", i, argv[i] );
111 if ( !strcmp( argv[i], "output_percentage" ) ||
112 !strcmp( argv[i], "-output_percentage" ))
116 HLTError("Missing output_percentage parameter");
119 HLTDebug("argv[%d+1] == %s", i, argv[i+1] );
120 fOutputPercentage = strtoul( argv[i+1], &cpErr, 0 );
123 HLTError("Cannot convert output_percentage parameter '%s'", argv[i+1] );
126 HLTInfo("Output percentage set to %lu %%", fOutputPercentage );
130 HLTError("Unknown option '%s'", argv[i] );
136 int AliHLTDummyComponent::DoDeinit()
138 // see header file for class documentation
142 int AliHLTDummyComponent::DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
143 AliHLTComponentTriggerData& /*trigData*/, AliHLTUInt8_t* outputPtr,
144 AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks )
146 // see header file for class documentation
147 HLTInfo("Output percentage set to %lu %%", fOutputPercentage );
149 unsigned long totalSize = 0;
150 // Loop over all input blocks in the event
151 for ( unsigned long n = 0; n < evtData.fBlockCnt; n++ )
153 // Align the beginning of this block to the required value.
154 if ( totalSize % kAliHLTBlockAlignment )
155 totalSize += kAliHLTBlockAlignment-(totalSize % kAliHLTBlockAlignment);
156 if ( totalSize > size )
158 // Determine the size we should use for the output for this block (the input block's size times the relative output size)
159 unsigned long mySize = (blocks[n].fSize * fOutputPercentage) / 100;
160 HLTInfo("HLT::Dummy::DoEvent", "mySize set (1)", "mySize == %lu B - blocks[%lu].fSize == %lu - fOutputPercentage == %lu",
161 mySize, n, blocks[n].fSize, fOutputPercentage );
162 // Check how much space we have left and adapt this output block's size accordingly.
163 if ( totalSize + mySize > size )
164 mySize = size-totalSize;
165 HLTInfo("HLT::Dummy::DoEvent", "mySize set (2)", "mySize == %lu B - totalSize == %lu - size == %lu",
166 mySize, totalSize, size );
168 continue; // No room left to write a further block.
169 // Now copy the input block
170 unsigned long copied = 0;
171 // First copy all full multiples of the input block
172 while ( copied+blocks[n].fSize <= mySize )
174 HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B",
175 blocks[n].fSize, copied, totalSize );
176 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, blocks[n].fSize );
177 copied += blocks[n].fSize;
179 // And the copy the remaining fragment of the block
180 HLTInfo("Copying %lu B - Copied: %lu B - totalSize: %lu B",
181 mySize-copied, copied, totalSize );
182 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, mySize-copied );
183 HLTInfo("Copied: %lu B - totalSize: %lu B",
185 // Fill a block data structure for our output block.
186 AliHLTComponentBlockData ob;
187 // Let the structure be filled with the default values.
188 // This takes care of setting the shared memory and data type values to default values,
189 // so that they can be filled in by the calling code.
191 // This block's start (offset) is after all other blocks written so far
192 ob.fOffset = totalSize;
193 // the size of this block's data.
195 // the data type of this block
196 ob.fDataType=blocks[n].fDataType;
197 // The specification of the data is copied from the input block.
198 ob.fSpecification = blocks[n].fSpecification;
199 // The data type is set automatically to the component's specified output data type.
200 // Place this block into the list of output blocks
201 outputBlocks.push_back( ob );
202 // Increase the total amount of data written so far to our output memory
205 // Finally we set the total size of output memory we consumed.