DaqFakeReader.cc

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#include "DaqFakeReader.h"
#include "DataFormats/FEDRawData/interface/FEDHeader.h"
#include "DataFormats/FEDRawData/interface/FEDTrailer.h"
#include "DataFormats/FEDRawData/interface/FEDNumbering.h"

#include "EventFilter/Utilities/interface/GlobalEventNumber.h"

#include "DataFormats/FEDRawData/interface/FEDRawData.h"

#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "CLHEP/Random/RandGauss.h"

#include <cmath>
#include <sys/time.h>
#include <cstring>


using namespace std;
using namespace edm;


// construction/destruction

//______________________________________________________________________________
DaqFakeReader::DaqFakeReader(const edm::ParameterSet& pset) 
  : runNum(1)
  , eventNum(1)
  , empty_events(pset.getUntrackedParameter<bool>("emptyEvents",false)) 
  , meansize(pset.getUntrackedParameter<unsigned int>("meanSize",1024))
  , width(pset.getUntrackedParameter<unsigned int>("width",1024))
  , injected_errors_per_million_events(pset.getUntrackedParameter<unsigned int>("injectErrPpm",0))
  , modulo_error_events(injected_errors_per_million_events ? 1000000/injected_errors_per_million_events : 0xffffffff)
{
  // mean = pset.getParameter<float>("mean");
  produces<FEDRawDataCollection>();
}

//______________________________________________________________________________
DaqFakeReader::~DaqFakeReader()
{
  
}


// implementation of member functions

//______________________________________________________________________________
int DaqFakeReader::fillRawData(Event& e,
                   FEDRawDataCollection*& data)
{
  // a null pointer is passed, need to allocate the fed collection
  data=new FEDRawDataCollection();
  EventID eID = e.id();
  
  if(!empty_events)
    {

      // Fill the EventID
      eventNum++;
      // FIXME:
      
      fillFEDs(FEDNumbering::MINSiPixelFEDID,
           FEDNumbering::MAXSiPixelFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINSiStripFEDID, 
           FEDNumbering::MAXSiStripFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINDTFEDID, 
           FEDNumbering::MAXDTFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINCSCFEDID, 
           FEDNumbering::MAXCSCFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINRPCFEDID,
           FEDNumbering::MAXRPCFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINECALFEDID, 
           FEDNumbering::MAXECALFEDID, 
           eID, *data, meansize, width);
      fillFEDs(FEDNumbering::MINHCALFEDID, 
           FEDNumbering::MAXHCALFEDID, 
           eID, *data, meansize, width);

      timeval now;
      gettimeofday(&now,nullptr);
      fillGTPFED(eID, *data,&now);
      //TODO: write fake TCDS FED filler
    }
  return 1;
}

void DaqFakeReader::produce(Event&e, EventSetup const&es){

  edm::Handle<FEDRawDataCollection> rawdata;
  FEDRawDataCollection *fedcoll = nullptr;
  fillRawData(e,fedcoll);
  std::unique_ptr<FEDRawDataCollection> bare_product(fedcoll);
  e.put(std::move(bare_product));
}


//______________________________________________________________________________
void DaqFakeReader::fillFEDs(const int fedmin, const int fedmax,
                 EventID& eID,
                 FEDRawDataCollection& data,
                 float meansize,
                 float width)
{
  
  // FIXME: last ID included?
  for (int fedId = fedmin; fedId <= fedmax; ++fedId ) {
    
    // Generate size...
    float logsiz = CLHEP::RandGauss::shoot(std::log(meansize),
                    std::log(meansize)-std::log(width/2.));
    size_t size = int(std::exp(logsiz));
    size -= size % 8; // all blocks aligned to 64 bit words

    FEDRawData& feddata = data.FEDData(fedId);
    // Allocate space for header+trailer+payload
    feddata.resize(size+16); 

    // Generate header
    FEDHeader::set(feddata.data(),
           1,             // Trigger type
           eID.event(),   // LV1_id (24 bits)
           0,             // BX_id
           fedId);        // source_id

    // Payload = all 0s...

    // Generate trailer
    int crc = 0; // FIXME : get CRC
    FEDTrailer::set(feddata.data()+8+size,
            size/8+2, // in 64 bit words!!!
            crc,
            0,        // Evt_stat
            0);       // TTS bits
  }  
}

void DaqFakeReader::fillGTPFED(EventID& eID,
                                FEDRawDataCollection& data, timeval *now)
{
  uint32_t fedId = FEDNumbering::MINTriggerGTPFEDID;
  FEDRawData& feddata = data.FEDData(fedId);
  uint32_t size = evf::evtn::SLINK_WORD_SIZE*37-16;//BST52_3BX
  feddata.resize(size+16);

  FEDHeader::set(feddata.data(),
             1,             // Trigger type
             eID.event(),   // LV1_id (24 bits)
             0,             // BX_id
             fedId);        // source_id

  int crc = 0; // FIXME : get CRC
  FEDTrailer::set(feddata.data()+8+size,
                  size/8+2, // in 64 bit words!!!
                  crc,
                  0,        // Evt_stat
                  0);       // TTS bits

  unsigned char * pOffset = feddata.data() + FEDHeader::length;
  //fill in event ID
  *( (uint32_t*)(pOffset + evf::evtn::EVM_BOARDID_OFFSET * evf::evtn::SLINK_WORD_SIZE / 2)) = evf::evtn::EVM_BOARDID_VALUE << evf::evtn::EVM_BOARDID_SHIFT;
  *( (uint32_t*)(pOffset + FEDHeader::length + (9*2 + evf::evtn::EVM_TCS_TRIGNR_OFFSET) * evf::evtn::SLINK_WORD_SIZE / 2))  = eID.event();
  //fill in timestamp
  *( (uint32_t*) (pOffset + evf::evtn::EVM_GTFE_BSTGPS_OFFSET * evf::evtn::SLINK_WORD_SIZE / 2)) = now->tv_sec;
  *( (uint32_t*) (pOffset + FEDHeader::length + evf::evtn::EVM_GTFE_BSTGPS_OFFSET * evf::evtn::SLINK_WORD_SIZE / 2 + evf::evtn::SLINK_HALFWORD_SIZE)) = now->tv_usec;

  //*( (uint16_t*) (pOffset + (evtn::EVM_GTFE_BLOCK*2 + evtn::EVM_TCS_LSBLNR_OFFSET)*evtn::SLINK_HALFWORD_SIZE)) = (unsigned short)fakeLs_-1;

  //we could also generate lumiblock, bcr, orbit,... but they are not currently used by the FRD input source

}


void DaqFakeReader::beginLuminosityBlock(LuminosityBlock const& iL, EventSetup const& iE)
{
  std::cout << "DaqFakeReader begin Lumi " << iL.luminosityBlock() << std::endl;
  fakeLs_=iL.luminosityBlock();
}