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. */
29 #include "AliHLTSystem.h"
30 #include "AliHLTDummyComponent.h"
31 #include "AliHLTDefinitions.h"
35 /** ROOT macro for the implementation of ROOT specific class methods */
36 ClassImp(AliHLTDummyComponent)
38 AliHLTDummyComponent::AliHLTDummyComponent()
40 fOutputPercentage(100) // By default we copy to the output exactly what we got as input
42 // see header file for class documentation
44 // refer to README to build package
46 // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
49 AliHLTDummyComponent::~AliHLTDummyComponent()
51 // see header file for class documentation
54 const char* AliHLTDummyComponent::GetComponentID()
56 // see header file for class documentation
57 return "Dummy"; // The ID of this component
60 void AliHLTDummyComponent::GetInputDataTypes( vector<AliHLTComponentDataType>& list)
62 // see header file for class documentation
63 /* in order to be backward compatible we have to keep the old code, at
64 * least for a while. Remember to use the new const kAliHLTVoidDataType
65 * if you are using a more recent AliRoot version (from Jan 07)
66 list.push_back(kAliHLTAnyDataType); // We do not have any requirements for our input data type(s).
69 AliHLTComponentDataType dt =
70 { sizeof(AliHLTComponentDataType),
71 {'*','*','*','*','*','*','*','\0'},
76 AliHLTComponentDataType AliHLTDummyComponent::GetOutputDataType()
78 // see header file for class documentation
79 /* in order to be backward compatible we have to keep the old code, at
80 * least for a while. Remember to use the new const kAliHLTVoidDataType
81 * if you are using a more recent AliRoot version (from Jan 07)
82 return kAliHLTVoidDataType;
84 AliHLTComponentDataType dt =
85 { sizeof(AliHLTComponentDataType),
86 {'\0','\0','\0','0','\0','\0','\0','\0'},
87 {'\0','\0','\0','\0'}};
91 void AliHLTDummyComponent::GetOutputDataSize( unsigned long& constBase, double& inputMultiplier )
93 // see header file for class documentation
95 inputMultiplier = ((double)fOutputPercentage)/100.0;
100 // Spawn function, return new instance of this class
101 AliHLTComponent* AliHLTDummyComponent::Spawn()
103 // see header file for class documentation
104 return new AliHLTDummyComponent;
107 int AliHLTDummyComponent::DoInit( int argc, const char** argv )
109 // perform initialization. We check whether our relative output size is specified in the arguments.
110 fOutputPercentage = 100;
115 Logging( kHLTLogDebug, "HLT::Dummy::DoInit", "Arguments", "argv[%d] == %s", i, argv[i] );
116 if ( !strcmp( argv[i], "output_percentage" ) )
120 Logging(kHLTLogError, "HLT::Dummy::DoInit", "Missing Argument", "Missing output_percentage parameter");
123 Logging( kHLTLogDebug, "HLT::Dummy::DoInit", "Arguments", "argv[%d+1] == %s", i, argv[i+1] );
124 fOutputPercentage = strtoul( argv[i+1], &cpErr, 0 );
127 Logging(kHLTLogError, "HLT::Dummy::DoInit", "Wrong Argument", "Cannot convert output_percentage parameter '%s'", argv[i+1] );
130 Logging( kHLTLogInfo, "HLT::Dummy::DoInit", "Output percentage set", "Output percentage set to %lu %%", fOutputPercentage );
134 Logging(kHLTLogError, "HLT::Dummy::DoInit", "Unknown Option", "Unknown option '%s'", argv[i] );
140 int AliHLTDummyComponent::DoDeinit()
142 // see header file for class documentation
146 int AliHLTDummyComponent::DoEvent( const AliHLTComponentEventData& evtData, const AliHLTComponentBlockData* blocks,
147 AliHLTComponentTriggerData& /*trigData*/, AliHLTUInt8_t* outputPtr,
148 AliHLTUInt32_t& size, vector<AliHLTComponentBlockData>& outputBlocks )
150 // see header file for class documentation
151 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "Output percentage set", "Output percentage set to %lu %%", fOutputPercentage );
153 unsigned long totalSize = 0;
154 // Loop over all input blocks in the event
155 for ( unsigned long n = 0; n < evtData.fBlockCnt; n++ )
157 // Align the beginning of this block to the required value.
158 if ( totalSize % kAliHLTBlockAlignment )
159 totalSize += kAliHLTBlockAlignment-(totalSize % kAliHLTBlockAlignment);
160 if ( totalSize > size )
162 // Determine the size we should use for the output for this block (the input block's size times the relative output size)
163 unsigned long mySize = (blocks[n].fSize * fOutputPercentage) / 100;
164 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "mySize set (1)", "mySize == %lu B - blocks[%lu].fSize == %lu - fOutputPercentage == %lu",
165 mySize, n, blocks[n].fSize, fOutputPercentage );
166 // Check how much space we have left and adapt this output block's size accordingly.
167 if ( totalSize + mySize > size )
168 mySize = size-totalSize;
169 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "mySize set (2)", "mySize == %lu B - totalSize == %lu - size == %lu",
170 mySize, totalSize, size );
172 continue; // No room left to write a further block.
173 // Now copy the input block
174 unsigned long copied = 0;
175 // First copy all full multiples of the input block
176 while ( copied+blocks[n].fSize <= mySize )
178 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "Copying", "Copying %lu B - Copied: %lu B - totalSize: %lu B",
179 blocks[n].fSize, copied, totalSize );
180 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, blocks[n].fSize );
181 copied += blocks[n].fSize;
183 // And the copy the remaining fragment of the block
184 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "Copying", "Copying %lu B - Copied: %lu B - totalSize: %lu B",
185 mySize-copied, copied, totalSize );
186 memcpy( outputPtr+totalSize+copied, blocks[n].fPtr, mySize-copied );
187 Logging( kHLTLogInfo, "HLT::Dummy::DoEvent", "Copied", "Copied: %lu B - totalSize: %lu B",
189 // Fill a block data structure for our output block.
190 AliHLTComponentBlockData ob;
191 // Let the structure be filled with the default values.
192 // This takes care of setting the shared memory and data type values to default values,
193 // so that they can be filled in by the calling code.
195 // This block's start (offset) is after all other blocks written so far
196 ob.fOffset = totalSize;
197 // the size of this block's data.
199 // the data type of this block
200 ob.fDataType=blocks[n].fDataType;
201 // The specification of the data is copied from the input block.
202 ob.fSpecification = blocks[n].fSpecification;
203 // The data type is set automatically to the component's specified output data type.
204 // Place this block into the list of output blocks
205 outputBlocks.push_back( ob );
206 // Increase the total amount of data written so far to our output memory
209 // Finally we set the total size of output memory we consumed.