/data/refman/pasoursint/CMSSW_6_1_2_SLHC4_patch1/src/EventFilter/SiStripRawToDigi/src/SiStripDigiToRaw.cc

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// Last commit: $Id: SiStripDigiToRaw.cc,v 1.41 2009/09/14 14:01:04 nc302 Exp $

#include "EventFilter/SiStripRawToDigi/interface/SiStripDigiToRaw.h"
#include "CondFormats/SiStripObjects/interface/SiStripFedCabling.h"
#include "DataFormats/FEDRawData/interface/FEDRawDataCollection.h"
#include "DataFormats/FEDRawData/interface/FEDHeader.h"
#include "DataFormats/FEDRawData/interface/FEDTrailer.h"
#include "DataFormats/SiStripDigi/interface/SiStripDigi.h"
#include "DataFormats/SiStripDigi/interface/SiStripRawDigi.h"
#include "DataFormats/SiStripCommon/interface/SiStripConstants.h"
#include "FWCore/Utilities/interface/CRC16.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include <iostream>
#include <sstream>
#include <vector>

namespace sistrip {

  // -----------------------------------------------------------------------------
  DigiToRaw::DigiToRaw( FEDReadoutMode mode, 
                        bool useFedKey ) : 
    mode_(mode),
    useFedKey_(useFedKey),
    bufferGenerator_()
  {
    if ( edm::isDebugEnabled() ) {
      LogDebug("DigiToRaw")
        << "[sistrip::DigiToRaw::DigiToRaw]"
        << " Constructing object...";
    }
    bufferGenerator_.setReadoutMode(mode_);
  }

  // -----------------------------------------------------------------------------
  DigiToRaw::~DigiToRaw() {
    if ( edm::isDebugEnabled() ) {
      LogDebug("DigiToRaw")
        << "[sistrip::DigiToRaw::~DigiToRaw]"
        << " Destructing object...";
    }
  }

  // -----------------------------------------------------------------------------
  void DigiToRaw::createFedBuffers( edm::Event& event,
                                    edm::ESHandle<SiStripFedCabling>& cabling,
                                    edm::Handle< edm::DetSetVector<SiStripDigi> >& collection,
                                    std::auto_ptr<FEDRawDataCollection>& buffers ) { 
    createFedBuffers_(event, cabling, collection, buffers, true);
  }
  
  void DigiToRaw::createFedBuffers( edm::Event& event,
                                    edm::ESHandle<SiStripFedCabling>& cabling,
                                    edm::Handle< edm::DetSetVector<SiStripRawDigi> >& collection,
                                    std::auto_ptr<FEDRawDataCollection>& buffers ) { 
    createFedBuffers_(event, cabling, collection, buffers, false);
  }
  
  template<class Digi_t>
  void DigiToRaw::createFedBuffers_( edm::Event& event,
                                     edm::ESHandle<SiStripFedCabling>& cabling,
                                     edm::Handle< edm::DetSetVector<Digi_t> >& collection,
                                     std::auto_ptr<FEDRawDataCollection>& buffers,
                                     bool zeroSuppressed) {
    try {
      
      //set the L1ID to use in the buffers
      bufferGenerator_.setL1ID(0xFFFFFF & event.id().event());
      
      const std::vector<uint16_t>& fed_ids = cabling->feds();
      std::vector<uint16_t>::const_iterator ifed;
      
      for ( ifed = fed_ids.begin(); ifed != fed_ids.end(); ifed++ ) {
        
        const std::vector<FedChannelConnection>& conns = cabling->connections(*ifed);
        std::vector<FedChannelConnection>::const_iterator iconn = conns.begin();
        
        FEDStripData fedData(zeroSuppressed);
        
        for ( ; iconn != conns.end(); iconn++ ) {
          
          // Determine FED key from cabling
          uint32_t fed_key = ( ( iconn->fedId() & sistrip::invalid_ ) << 16 ) | ( iconn->fedCh() & sistrip::invalid_ );
        
          // Determine whether DetId or FED key should be used to index digi containers
          uint32_t key = ( useFedKey_ || mode_ == READOUT_MODE_SCOPE ) ? fed_key : iconn->detId();
          
          // Check key is non-zero and valid
          if ( !key || ( key == sistrip::invalid32_ ) ) { continue; }

          // Determine APV pair number (needed only when using DetId)
          uint16_t ipair = ( useFedKey_ || mode_ == READOUT_MODE_SCOPE ) ? 0 : iconn->apvPairNumber();
          
          FEDStripData::ChannelData& chanData = fedData[iconn->fedCh()];

          // Find digis for DetID in collection
          typename std::vector< edm::DetSet<Digi_t> >::const_iterator digis = collection->find( key );
          if (digis == collection->end()) { continue; } 

          typename edm::DetSet<Digi_t>::const_iterator idigi, digis_begin(digis->data.begin());
          for ( idigi = digis_begin; idigi != digis->data.end(); idigi++ ) {
            
            if ( STRIP(idigi, digis_begin) < ipair*256 ||
                 STRIP(idigi, digis_begin) > ipair*256+255 ) { continue; }
            const unsigned short strip = STRIP(idigi, digis_begin) % 256;

            if ( strip >= STRIPS_PER_FEDCH ) {
              if ( edm::isDebugEnabled() ) {
                std::stringstream ss;
                ss << "[sistrip::DigiToRaw::createFedBuffers]"
                   << " strip >= strips_per_fedCh";
                edm::LogWarning("DigiToRaw") << ss.str();
              }
              continue;
            }
          
            // check if value already exists
            if ( edm::isDebugEnabled() ) {
              const uint16_t value = 0;//chanData[strip];
              if ( value && value != (*idigi).adc() ) {
                std::stringstream ss; 
                ss << "[sistrip::DigiToRaw::createFedBuffers]" 
                   << " Incompatible ADC values in buffer!"
                   << "  FedId/FedCh: " << *ifed << "/" << iconn->fedCh()
                   << "  DetStrip: " << STRIP(idigi, digis_begin)
                   << "  FedChStrip: " << strip
                   << "  AdcValue: " << (*idigi).adc()
                   << "  RawData[" << strip << "]: " << value;
                edm::LogWarning("DigiToRaw") << ss.str();
              }
            }

            // Add digi to buffer
            chanData[strip] = (*idigi).adc();

          }
          // if ((*idigi).strip() >= (ipair+1)*256) break;
        }

        //create the buffer
        FEDRawData& fedrawdata = buffers->FEDData( *ifed );
        bufferGenerator_.generateBuffer(&fedrawdata,fedData,*ifed);
        
       }
    }
    catch (const std::exception& e) {
      if ( edm::isDebugEnabled() ) {
        edm::LogWarning("DigiToRaw") 
          << "DigiToRaw::createFedBuffers] " 
          << "Exception caught : " << e.what();
      }
    }
  
  }

  inline uint16_t DigiToRaw::STRIP(const edm::DetSet<SiStripDigi>::const_iterator& it, const edm::DetSet<SiStripDigi>::const_iterator& begin) const {return it->strip();}
  inline uint16_t DigiToRaw::STRIP(const edm::DetSet<SiStripRawDigi>::const_iterator& it, const edm::DetSet<SiStripRawDigi>::const_iterator& begin) const {return it-begin;}

}