[u/mrichter/AliRoot.git] / HLT / RCU / AliHLTAltroChannelSelectorComponent.cxx

// $Id$

//**************************************************************************
//* This file is property of and copyright by the ALICE HLT Project        * 
//* ALICE Experiment at CERN, All rights reserved.                         *
//*                                                                        *
//* Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no>        *
//*                  for The ALICE HLT Project.                            *
//*                                                                        *
//* 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.                  *
//**************************************************************************

/** @file   AliHLTAltroChannelSelectorComponent.cxx
    @author Matthias Richter
    @date   
    @brief  A filter/selective readout component for Altro data.
*/

// see header file for class documentation
// or
// refer to README to build package
// or
// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt

#include <cassert>
#include "AliHLTAltroChannelSelectorComponent.h"
#include "AliAltroDecoder.h"
#include "AliAltroData.h"

/** ROOT macro for the implementation of ROOT specific class methods */
ClassImp(AliHLTAltroChannelSelectorComponent)

AliHLTAltroChannelSelectorComponent::AliHLTAltroChannelSelectorComponent()
  :
  AliHLTProcessor(),
  fSkipCorrupted(false),
  fTalkative(false)
{
  // see header file for class documentation
  // or
  // refer to README to build package
  // or
  // visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
}

AliHLTAltroChannelSelectorComponent::~AliHLTAltroChannelSelectorComponent()
{
  // see header file for class documentation
}

const char* AliHLTAltroChannelSelectorComponent::GetComponentID()
{
  // see header file for class documentation
  return "AltroChannelSelector";
}

void AliHLTAltroChannelSelectorComponent::GetInputDataTypes(AliHLTComponentDataTypeList& list)
{
  // see header file for class documentation
  list.clear();
  list.push_back(kAliHLTDataTypeDDLRaw|kAliHLTDataOriginTPC);
  list.push_back(kAliHLTDataTypeHwAddr16);
}

AliHLTComponentDataType AliHLTAltroChannelSelectorComponent::GetOutputDataType()
{
  // see header file for class documentation
  return kAliHLTDataTypeDDLRaw|kAliHLTDataOriginTPC;
}

void AliHLTAltroChannelSelectorComponent::GetOutputDataSize(unsigned long& constBase, double& inputMultiplier)
{
  // see header file for class documentation
  constBase=0;
  inputMultiplier=1.0;
}

AliHLTComponent* AliHLTAltroChannelSelectorComponent::Spawn()
{
  // see header file for class documentation
  return new AliHLTAltroChannelSelectorComponent;
}

int AliHLTAltroChannelSelectorComponent::DoInit(int argc, const char** argv)
{
  // see header file for class documentation
  int iResult=0;
  TString argument="";
  bool bMissingParam=0;
  for (int i=0; i<argc && iResult>=0; i++) {
    argument=argv[i];
    if (argument.IsNull()) continue;

    // -skip-corrupted
    if (argument.CompareTo("-skip-corrupted")==0) {
      fSkipCorrupted=true;

    // -talkative
    } else if (argument.CompareTo("-talkative")==0) {
      fTalkative=true;
    } else {
      HLTError("unknown argument %s", argument.Data());
      iResult=-EINVAL;
    }
  }

  if (bMissingParam) {
    HLTError("missing parameter for argument %s", argument.Data());
    iResult=-EINVAL;
  }

  return iResult;
}

int AliHLTAltroChannelSelectorComponent::DoDeinit()
{
  // see header file for class documentation
  return 0;
}

int AliHLTAltroChannelSelectorComponent::DoEvent(const AliHLTComponentEventData& evtData,
						 const AliHLTComponentBlockData* blocks, 
						 AliHLTComponentTriggerData& /*trigData*/,
						 AliHLTUInt8_t* outputPtr, 
						 AliHLTUInt32_t& size,
						 AliHLTComponentBlockDataList& outputBlocks )
{
  // see header file for class documentation
  int iResult=0;
  const int cdhSize=32;

  if (!IsDataEvent()) {
    size=0;
    return 0;
  }

  // process the DLL input
  int blockno=0;
  const AliHLTComponentBlockData* pDesc=NULL;

  AliAltroDecoder* decoder=NULL;
  for (pDesc=GetFirstInputBlock(kAliHLTDataTypeDDLRaw); pDesc!=NULL; pDesc=GetNextInputBlock(), blockno++) {
    iResult=0;
    if (pDesc->fSize<=32) {
      continue;
    }

    // search for the active pad information
    AliHLTUInt16_t* pActiveHwAddressArray=NULL;
    int iArraySize=0;
    for (int i=0; i<(int)evtData.fBlockCnt; i++ ) {
      // search for selection data of hw address type
      // which matches the data specification of the block
      if (blocks[i].fDataType==kAliHLTDataTypeHwAddr16 && blocks[i].fSpecification==pDesc->fSpecification) {
	pActiveHwAddressArray=reinterpret_cast<AliHLTUInt16_t*>(blocks[i].fPtr);
	iArraySize=blocks[i].fSize/sizeof(AliHLTUInt16_t);
	break;
      }
    }
    if (pActiveHwAddressArray==NULL) {
      HLTWarning("no block of type %s for specification 0x%08x available, data block unchanged", 
		 DataType2Text(kAliHLTDataTypeHwAddr16).c_str(), 
		 pDesc->fSpecification);
      iResult=-EFAULT;
    }

    if (decoder) delete decoder;
    decoder=new AliAltroDecoder;
    if (decoder->SetMemory(reinterpret_cast<UChar_t*>(pDesc->fPtr), pDesc->fSize)<0) {
      HLTWarning("corrupted data block: initialization of decoder failed for block: %s specification %#x size %d",
		 DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification, pDesc->fSize);
      iResult=-EFAULT;
    } else {
      if (decoder->Decode()) {
	HLTDebug("init decoder %p size %d", pDesc->fPtr,pDesc->fSize);
      } else {
	HLTWarning("corrupted data block: decoding failed for raw data block: %s specification %#x size %d",
		   DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification, pDesc->fSize);
	iResult=-EFAULT;
      }
    }

    unsigned int rcuTrailerLength=0;
    if (iResult>=0 &&
	((rcuTrailerLength=decoder->GetRCUTrailerSize())==0 ||
	 rcuTrailerLength>pDesc->fSize-cdhSize)) {
      if (rcuTrailerLength>0) {
	HLTWarning("corrupted data block: RCU trailer length exceeds buffer size");
      } else {
	HLTWarning("corrupted data block: RCU trailer of zero length");	
      }
      iResult=-EFAULT;
    }

    if (iResult<0) {
      // TODO: here the trigger has to come into play. It is up to
      // policy if a corrupted data block should be kept (original
      // DDL) or discarded. In any case, the block is not going to
      // be part of HLTOUT
      HLTWarning("skipping corrupted data block for event %lu, data block %s 0x%08x", evtData.fEventID,
		 DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification);
      iResult=0;
      continue;
    }

    int iSelected=0;
    int iTotal=0;
    int iCorrupted=0;
    AliHLTUInt32_t iOutputSize=0;
    AliHLTUInt32_t iNofAltro40=0;
    AliHLTUInt32_t iCapacity=size;
    AliAltroData channel;

    // first add the RCU trailer
    AliHLTUInt8_t* pSrc=reinterpret_cast<AliHLTUInt8_t*>(pDesc->fPtr);
    pSrc+=pDesc->fSize-rcuTrailerLength;
    if ((iResult=CopyBlockToEnd(outputPtr, iCapacity, iOutputSize, pSrc, rcuTrailerLength))>=0) {
      assert(iResult==(int)rcuTrailerLength);
      iOutputSize+=rcuTrailerLength;
    } else {
      HLTError("failed to write RCU trailer of length %d for block %d, too little space in output buffer?", rcuTrailerLength, blockno);
      iResult=-ENOSPC;
      break;
    }

    while (decoder->NextChannel(&channel) && iResult>=0) {
      iTotal++;

      int hwAddress=channel.GetHadd();
      int active=0;
      for (active=0; active<iArraySize; active++) {
	if (pActiveHwAddressArray[active]==(AliHLTUInt16_t)hwAddress) {
	  break;
	}
      }
      if (active>=iArraySize) {
	HLTDebug("ALTRO block %#x (%d) discarded (inactive)", hwAddress, hwAddress);
	continue;
      }

      // no of 10 bit words is without the fill words to fill complete 40 bit words
      // in addition, align to complete 40 bit words (the '+3')
      // also, the 5 bytes of the Altro trailer must be added to get the full size
      int channelSize=((channel.GetDataSize()+3)/4)*5;
      if (channelSize==0) {
	if (fTalkative) HLTWarning("skipping zero length channel (hw address %d)", hwAddress);
	iCorrupted++;
	continue;
      }
      channelSize+=5;
      HLTDebug("ALTRO block hwAddress 0x%08x (%d) selected (active), size %d", hwAddress, hwAddress, channelSize);

      if ((iResult=decoder->CopyBackward(outputPtr, iCapacity-iOutputSize))>=0) {
	if (channelSize == iResult) {
	  if (channelSize%5 == 0) {
	    iNofAltro40+=channelSize/5;
	    iOutputSize+=channelSize;
	  } else {
	    if (fTalkative) HLTWarning("corrupted ALTRO channel: incomplete 40 bit word (channel hw address %d)", hwAddress);
	    iCorrupted++;
	    continue;
	  }
	} else {
	  if (fTalkative) HLTWarning("internal error: failed to copy full channel: %d out of %d bytes (hw address %d)", iResult, channelSize, hwAddress);
	  iCorrupted++;
	  continue;
	}
      } else {
	if (fTalkative) HLTError("failed to write ALTRO channel of length %d for block %d  (hw address %d)", channelSize, blockno, hwAddress);
	// corrupted channel, but keep going
	iCorrupted++;
	iResult=0;
	continue;
      }
      iSelected++;
    }
    if (iResult>=0) {
      // write the common data header
      if ((iResult=CopyBlockToEnd(outputPtr, iCapacity, iOutputSize, pDesc->fPtr, cdhSize))>=0) {
	assert(iResult==cdhSize);
	iOutputSize+=cdhSize;

	// set new length of the data block
	AliHLTUInt32_t* pCdhSize=reinterpret_cast<AliHLTUInt32_t*>(outputPtr+iCapacity-iOutputSize);
	*pCdhSize=iOutputSize;

	// set number of Altro words
	AliHLTUInt32_t* pNofAltro40=reinterpret_cast<AliHLTUInt32_t*>(outputPtr+iCapacity-rcuTrailerLength);
	*pNofAltro40=iNofAltro40;

	// insert block descriptor
	AliHLTComponentBlockData bd;
	FillBlockData(bd);
	bd.fOffset=iCapacity-iOutputSize;
	bd.fSize=iOutputSize;
	bd.fDataType=pDesc->fDataType;
	bd.fSpecification=pDesc->fSpecification;
	outputBlocks.push_back(bd);
	iCapacity-=iOutputSize;
      } else {
	HLTError("failed to write CDH of length %d for block %d", cdhSize, blockno);
	break;
      }
    }
    if (fTalkative) HLTImportant("data block %d (0x%08x): selected %d out of %d ALTRO channel(s), %d corrupted channels skipped", blockno, pDesc->fSpecification, iSelected, iTotal, iCorrupted);
  }
  if (decoder) delete decoder;

  if (iResult<0) {
    outputBlocks.clear();
  }

  // all data blocks need to be moved to the beginning of the
  // buffer because PubSub is not able to handle data blocks entirely
  // at the end of the buffer. The problem is that the component always
  // indicates to use the full size of the buffer
  if (outputBlocks.size()>0) {
    int offset=outputBlocks.back().fOffset;
    size-=offset;
    memmove(outputPtr, outputPtr+offset, size);
    for (AliHLTComponentBlockDataList::iterator block=outputBlocks.begin();
	 block!=outputBlocks.end();
	 block++) {
      block->fOffset-=offset;
    }
  }

  return iResult;
}

int AliHLTAltroChannelSelectorComponent::CopyBlockToEnd(AliHLTUInt8_t* pTgt, unsigned capacity, unsigned position, void* pSrc, unsigned size)
{
  int iResult=0;
  if (pTgt==NULL || pSrc==NULL) return -EINVAL;
  if (capacity-position<size) return -ENOSPC;
  
  memcpy(pTgt+(capacity-position-size), pSrc, size);
  iResult=size;
  
  return iResult;
}
Commit	Line	Data
3e6ec852	1	// $Id$
3e6ec852	2
13398559	3	//**************************************************************************
	4	//* This file is property of and copyright by the ALICE HLT Project *
	5	//* ALICE Experiment at CERN, All rights reserved. *
	6	//* *
	7	//* Primary Authors: Matthias Richter <Matthias.Richter@ift.uib.no> *
	8	//* for The ALICE HLT Project. *
	9	//* *
	10	//* Permission to use, copy, modify and distribute this software and its *
	11	//* documentation strictly for non-commercial purposes is hereby granted *
	12	//* without fee, provided that the above copyright notice appears in all *
	13	//* copies and that both the copyright notice and this permission notice *
	14	//* appear in the supporting documentation. The authors make no claims *
	15	//* about the suitability of this software for any purpose. It is *
	16	//* provided "as is" without express or implied warranty. *
	17	//**************************************************************************
3e6ec852	18
	19	/** @file AliHLTAltroChannelSelectorComponent.cxx
	20	@author Matthias Richter
	21	@date
13398559	22	@brief A filter/selective readout component for Altro data.
13398559	23	*/
3e6ec852	24
	25	// see header file for class documentation
	26	// or
	27	// refer to README to build package
	28	// or
	29	// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
	30
e1440dab	31	#include <cassert>
3e6ec852	32	#include "AliHLTAltroChannelSelectorComponent.h"
4ca5858d	33	#include "AliAltroDecoder.h"
4ca5858d	34	#include "AliAltroData.h"
3e6ec852	35
	36	/** ROOT macro for the implementation of ROOT specific class methods */
	37	ClassImp(AliHLTAltroChannelSelectorComponent)
	38
	39	AliHLTAltroChannelSelectorComponent::AliHLTAltroChannelSelectorComponent()
	40	:
e1440dab	41	AliHLTProcessor(),
4ca5858d	42	fSkipCorrupted(false),
4ca5858d	43	fTalkative(false)
3e6ec852	44	{
	45	// see header file for class documentation
	46	// or
	47	// refer to README to build package
	48	// or
	49	// visit http://web.ift.uib.no/~kjeks/doc/alice-hlt
	50	}
	51
	52	AliHLTAltroChannelSelectorComponent::~AliHLTAltroChannelSelectorComponent()
	53	{
	54	// see header file for class documentation
	55	}
	56
	57	const char* AliHLTAltroChannelSelectorComponent::GetComponentID()
	58	{
	59	// see header file for class documentation
	60	return "AltroChannelSelector";
	61	}
	62
	63	void AliHLTAltroChannelSelectorComponent::GetInputDataTypes(AliHLTComponentDataTypeList& list)
	64	{
	65	// see header file for class documentation
	66	list.clear();
	67	list.push_back(kAliHLTDataTypeDDLRaw\|kAliHLTDataOriginTPC);
64defa03	68	list.push_back(kAliHLTDataTypeHwAddr16);
3e6ec852	69	}
	70
	71	AliHLTComponentDataType AliHLTAltroChannelSelectorComponent::GetOutputDataType()
	72	{
	73	// see header file for class documentation
	74	return kAliHLTDataTypeDDLRaw\|kAliHLTDataOriginTPC;
	75	}
	76
	77	void AliHLTAltroChannelSelectorComponent::GetOutputDataSize(unsigned long& constBase, double& inputMultiplier)
	78	{
	79	// see header file for class documentation
	80	constBase=0;
	81	inputMultiplier=1.0;
	82	}
	83
	84	AliHLTComponent* AliHLTAltroChannelSelectorComponent::Spawn()
	85	{
	86	// see header file for class documentation
	87	return new AliHLTAltroChannelSelectorComponent;
	88	}
	89
	90	int AliHLTAltroChannelSelectorComponent::DoInit(int argc, const char** argv)
	91	{
	92	// see header file for class documentation
	93	int iResult=0;
	94	TString argument="";
e1440dab	95	bool bMissingParam=0;
3e6ec852	96	for (int i=0; i<argc && iResult>=0; i++) {
	97	argument=argv[i];
	98	if (argument.IsNull()) continue;
	99
4ca5858d	100	// -skip-corrupted
	101	if (argument.CompareTo("-skip-corrupted")==0) {
	102	fSkipCorrupted=true;
	103
	104	// -talkative
	105	} else if (argument.CompareTo("-talkative")==0) {
	106	fTalkative=true;
3e6ec852	107	} else {
4ca5858d	108	HLTError("unknown argument %s", argument.Data());
3e6ec852	109	iResult=-EINVAL;
	110	}
	111	}
	112
e1440dab	113	if (bMissingParam) {
	114	HLTError("missing parameter for argument %s", argument.Data());
	115	iResult=-EINVAL;
	116	}
	117
3e6ec852	118	return iResult;
	119	}
	120
	121	int AliHLTAltroChannelSelectorComponent::DoDeinit()
	122	{
	123	// see header file for class documentation
	124	return 0;
	125	}
	126
	127	int AliHLTAltroChannelSelectorComponent::DoEvent(const AliHLTComponentEventData& evtData,
	128	const AliHLTComponentBlockData* blocks,
	129	AliHLTComponentTriggerData& /trigData/,
	130	AliHLTUInt8_t* outputPtr,
	131	AliHLTUInt32_t& size,
	132	AliHLTComponentBlockDataList& outputBlocks )
	133	{
	134	// see header file for class documentation
	135	int iResult=0;
4ca5858d	136	const int cdhSize=32;
3e6ec852	137
8d682af4	138	if (!IsDataEvent()) {
	139	size=0;
	140	return 0;
	141	}
	142
e1440dab	143	// process the DLL input
e1440dab	144	int blockno=0;
1d337632	145	const AliHLTComponentBlockData* pDesc=NULL;
1d337632	146
4ca5858d	147	AliAltroDecoder* decoder=NULL;
	148	for (pDesc=GetFirstInputBlock(kAliHLTDataTypeDDLRaw); pDesc!=NULL; pDesc=GetNextInputBlock(), blockno++) {
	149	iResult=0;
359ba057	150	if (pDesc->fSize<=32) {
	151	continue;
	152	}
e1440dab	153
e1440dab	154	// search for the active pad information
64defa03	155	AliHLTUInt16_t* pActiveHwAddressArray=NULL;
64defa03	156	int iArraySize=0;
e1440dab	157	for (int i=0; i<(int)evtData.fBlockCnt; i++ ) {
64defa03	158	// search for selection data of hw address type
4ca5858d	159	// which matches the data specification of the block
	160	if (blocks[i].fDataType==kAliHLTDataTypeHwAddr16 && blocks[i].fSpecification==pDesc->fSpecification) {
	161	pActiveHwAddressArray=reinterpret_cast<AliHLTUInt16_t*>(blocks[i].fPtr);
	162	iArraySize=blocks[i].fSize/sizeof(AliHLTUInt16_t);
	163	break;
e1440dab	164	}
e1440dab	165	}
4ca5858d	166	if (pActiveHwAddressArray==NULL) {
4ca5858d	167	HLTWarning("no block of type %s for specification 0x%08x available, data block unchanged",
64defa03	168	DataType2Text(kAliHLTDataTypeHwAddr16).c_str(),
1d337632	169	pDesc->fSpecification);
4ca5858d	170	iResult=-EFAULT;
	171	}
	172
	173	if (decoder) delete decoder;
	174	decoder=new AliAltroDecoder;
	175	if (decoder->SetMemory(reinterpret_cast<UChar_t*>(pDesc->fPtr), pDesc->fSize)<0) {
	176	HLTWarning("corrupted data block: initialization of decoder failed for block: %s specification %#x size %d",
	177	DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification, pDesc->fSize);
	178	iResult=-EFAULT;
	179	} else {
	180	if (decoder->Decode()) {
	181	HLTDebug("init decoder %p size %d", pDesc->fPtr,pDesc->fSize);
	182	} else {
	183	HLTWarning("corrupted data block: decoding failed for raw data block: %s specification %#x size %d",
	184	DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification, pDesc->fSize);
	185	iResult=-EFAULT;
	186	}
	187	}
	188
8d682af4	189	unsigned int rcuTrailerLength=0;
	190	if (iResult>=0 &&
	191	((rcuTrailerLength=decoder->GetRCUTrailerSize())==0 \|\|
	192	rcuTrailerLength>pDesc->fSize-cdhSize)) {
	193	if (rcuTrailerLength>0) {
	194	HLTWarning("corrupted data block: RCU trailer length exceeds buffer size");
	195	} else {
	196	HLTWarning("corrupted data block: RCU trailer of zero length");
	197	}
4ca5858d	198	iResult=-EFAULT;
	199	}
	200
	201	if (iResult<0) {
8d682af4	202	// TODO: here the trigger has to come into play. It is up to
	203	// policy if a corrupted data block should be kept (original
	204	// DDL) or discarded. In any case, the block is not going to
	205	// be part of HLTOUT
	206	HLTWarning("skipping corrupted data block for event %lu, data block %s 0x%08x", evtData.fEventID,
	207	DataType2Text(pDesc->fDataType).c_str(), pDesc->fSpecification);
3dcae0cc	208	iResult=0;
e1440dab	209	continue;
	210	}
	211
1d337632	212	int iSelected=0;
1d337632	213	int iTotal=0;
4ca5858d	214	int iCorrupted=0;
e1440dab	215	AliHLTUInt32_t iOutputSize=0;
4ca5858d	216	AliHLTUInt32_t iNofAltro40=0;
e1440dab	217	AliHLTUInt32_t iCapacity=size;
4ca5858d	218	AliAltroData channel;
8d682af4	219
	220	// first add the RCU trailer
	221	AliHLTUInt8_t* pSrc=reinterpret_cast<AliHLTUInt8_t*>(pDesc->fPtr);
	222	pSrc+=pDesc->fSize-rcuTrailerLength;
	223	if ((iResult=CopyBlockToEnd(outputPtr, iCapacity, iOutputSize, pSrc, rcuTrailerLength))>=0) {
	224	assert(iResult==(int)rcuTrailerLength);
	225	iOutputSize+=rcuTrailerLength;
	226	} else {
	227	HLTError("failed to write RCU trailer of length %d for block %d, too little space in output buffer?", rcuTrailerLength, blockno);
	228	iResult=-ENOSPC;
	229	break;
	230	}
	231
4ca5858d	232	while (decoder->NextChannel(&channel) && iResult>=0) {
1d337632	233	iTotal++;
64defa03	234
4ca5858d	235	int hwAddress=channel.GetHadd();
e1440dab	236	int active=0;
4ca5858d	237	for (active=0; active<iArraySize; active++) {
	238	if (pActiveHwAddressArray[active]==(AliHLTUInt16_t)hwAddress) {
	239	break;
e1440dab	240	}
e1440dab	241	}
64defa03	242	if (active>=iArraySize) {
4ca5858d	243	HLTDebug("ALTRO block %#x (%d) discarded (inactive)", hwAddress, hwAddress);
e1440dab	244	continue;
	245	}
	246
4ca5858d	247	// no of 10 bit words is without the fill words to fill complete 40 bit words
	248	// in addition, align to complete 40 bit words (the '+3')
	249	// also, the 5 bytes of the Altro trailer must be added to get the full size
	250	int channelSize=((channel.GetDataSize()+3)/4)*5;
8d682af4	251	if (channelSize==0) {
	252	if (fTalkative) HLTWarning("skipping zero length channel (hw address %d)", hwAddress);
	253	iCorrupted++;
	254	continue;
	255	}
4ca5858d	256	channelSize+=5;
4ca5858d	257	HLTDebug("ALTRO block hwAddress 0x%08x (%d) selected (active), size %d", hwAddress, hwAddress, channelSize);
4ca5858d	258
	259	if ((iResult=decoder->CopyBackward(outputPtr, iCapacity-iOutputSize))>=0) {
	260	if (channelSize == iResult) {
	261	if (channelSize%5 == 0) {
	262	iNofAltro40+=channelSize/5;
	263	iOutputSize+=channelSize;
e1440dab	264	} else {
8d682af4	265	if (fTalkative) HLTWarning("corrupted ALTRO channel: incomplete 40 bit word (channel hw address %d)", hwAddress);
4ca5858d	266	iCorrupted++;
4ca5858d	267	continue;
e1440dab	268	}
4ca5858d	269	} else {
8d682af4	270	if (fTalkative) HLTWarning("internal error: failed to copy full channel: %d out of %d bytes (hw address %d)", iResult, channelSize, hwAddress);
4ca5858d	271	iCorrupted++;
4ca5858d	272	continue;
e1440dab	273	}
e1440dab	274	} else {
8d682af4	275	if (fTalkative) HLTError("failed to write ALTRO channel of length %d for block %d (hw address %d)", channelSize, blockno, hwAddress);
4ca5858d	276	// corrupted channel, but keep going
	277	iCorrupted++;
	278	iResult=0;
	279	continue;
e1440dab	280	}
4ca5858d	281	iSelected++;
e1440dab	282	}
	283	if (iResult>=0) {
	284	// write the common data header
1d337632	285	if ((iResult=CopyBlockToEnd(outputPtr, iCapacity, iOutputSize, pDesc->fPtr, cdhSize))>=0) {
e1440dab	286	assert(iResult==cdhSize);
	287	iOutputSize+=cdhSize;
	288
	289	// set new length of the data block
4ca5858d	290	AliHLTUInt32_t* pCdhSize=reinterpret_cast<AliHLTUInt32_t*>(outputPtr+iCapacity-iOutputSize);
e1440dab	291	*pCdhSize=iOutputSize;
e1440dab	292
4ca5858d	293	// set number of Altro words
	294	AliHLTUInt32_t* pNofAltro40=reinterpret_cast<AliHLTUInt32_t*>(outputPtr+iCapacity-rcuTrailerLength);
	295	*pNofAltro40=iNofAltro40;
	296
e1440dab	297	// insert block descriptor
	298	AliHLTComponentBlockData bd;
	299	FillBlockData(bd);
	300	bd.fOffset=iCapacity-iOutputSize;
	301	bd.fSize=iOutputSize;
1d337632	302	bd.fDataType=pDesc->fDataType;
1d337632	303	bd.fSpecification=pDesc->fSpecification;
e1440dab	304	outputBlocks.push_back(bd);
	305	iCapacity-=iOutputSize;
	306	} else {
	307	HLTError("failed to write CDH of length %d for block %d", cdhSize, blockno);
	308	break;
	309	}
	310	}
359ba057	311	if (fTalkative) HLTImportant("data block %d (0x%08x): selected %d out of %d ALTRO channel(s), %d corrupted channels skipped", blockno, pDesc->fSpecification, iSelected, iTotal, iCorrupted);
3e6ec852	312	}
4ca5858d	313	if (decoder) delete decoder;
3e6ec852	314
e1440dab	315	if (iResult<0) {
e1440dab	316	outputBlocks.clear();
3e6ec852	317	}
3e6ec852	318
359ba057	319	// all data blocks need to be moved to the beginning of the
	320	// buffer because PubSub is not able to handle data blocks entirely
	321	// at the end of the buffer. The problem is that the component always
	322	// indicates to use the full size of the buffer
	323	if (outputBlocks.size()>0) {
	324	int offset=outputBlocks.back().fOffset;
	325	size-=offset;
	326	memmove(outputPtr, outputPtr+offset, size);
	327	for (AliHLTComponentBlockDataList::iterator block=outputBlocks.begin();
	328	block!=outputBlocks.end();
	329	block++) {
	330	block->fOffset-=offset;
	331	}
	332	}
e1440dab	333
	334	return iResult;
	335	}
	336
	337	int AliHLTAltroChannelSelectorComponent::CopyBlockToEnd(AliHLTUInt8_t* pTgt, unsigned capacity, unsigned position, void* pSrc, unsigned size)
	338	{
	339	int iResult=0;
	340	if (pTgt==NULL \|\| pSrc==NULL) return -EINVAL;
	341	if (capacity-position<size) return -ENOSPC;
	342
	343	memcpy(pTgt+(capacity-position-size), pSrc, size);
	344	iResult=size;
	345
3e6ec852	346	return iResult;
3e6ec852	347	}