HcalEmptyEventFilter.cc

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// -*- C++ -*-
//
// Package:    HcalEmptyEventFilter
// Class:      HcalEmptyEventFilter
// 
//
// Original Author:  Jeremiah Mans
//         Created:  Tue Jun 4 CET 2012
//
//


// system include files
#include <memory>

// user include files
#include "FWCore/Framework/interface/Frameworkfwd.h"

#include "FWCore/Framework/interface/EDFilter.h"
#include "FWCore/Framework/interface/Event.h"
#include "FWCore/Framework/interface/MakerMacros.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include <string>
#include <iostream>

#include "DataFormats/FEDRawData/interface/FEDRawData.h"
#include "DataFormats/FEDRawData/interface/FEDRawDataCollection.h"
#include "DataFormats/FEDRawData/interface/FEDNumbering.h"
#include "EventFilter/HcalRawToDigi/interface/HcalDCCHeader.h"
#include "EventFilter/HcalRawToDigi/interface/HcalHTRData.h"

//
// class declaration
//

class HcalEmptyEventFilter : public edm::EDFilter {
public:
  explicit HcalEmptyEventFilter(const edm::ParameterSet&);
  virtual ~HcalEmptyEventFilter();
  
private:
  virtual bool filter(edm::Event&, const edm::EventSetup&) override;
  
  // ----------member data ---------------------------

  edm::EDGetTokenT<FEDRawDataCollection> tok_data_;  

};


//
// constructors and destructor
//
HcalEmptyEventFilter::HcalEmptyEventFilter(const edm::ParameterSet& iConfig)
{
  //now do what ever initialization is needed

  tok_data_  = consumes<FEDRawDataCollection>(iConfig.getParameter<edm::InputTag>("InputLabel") );
}


HcalEmptyEventFilter::~HcalEmptyEventFilter()
{
 
  // do anything here that needs to be done at desctruction time
  // (e.g. close files, deallocate resources etc.)

}


//
// member functions
//

// ------------ method called on each new Event  ------------
bool
HcalEmptyEventFilter::filter(edm::Event& iEvent, const edm::EventSetup& iSetup)
{
  using namespace edm;
  
  edm::Handle<FEDRawDataCollection> rawdata;  
  iEvent.getByToken(tok_data_,rawdata);

  bool haveEmpty=false;
  
  for (int i=FEDNumbering::MINHCALFEDID; !haveEmpty &&
       i<=FEDNumbering::MAXHCALFEDID; i++) {
      const FEDRawData& fedData = rawdata->FEDData(i) ; 

      if (fedData.size()<16) continue;

      // get the DCC header
      const HcalDCCHeader* dccHeader=(const HcalDCCHeader*)(fedData.data());
  
      // walk through the HTR data...
      HcalHTRData htr;

      for (int spigot=0; spigot<HcalDCCHeader::SPIGOT_COUNT && !haveEmpty; spigot++) {
    if (!dccHeader->getSpigotPresent(spigot)) continue;
    
    int retval=dccHeader->getSpigotData(spigot,htr,fedData.size());

    if (retval!=0) continue; // format error is not empty event

    if (htr.isEmptyEvent()) haveEmpty=true;
      }
  }
  return haveEmpty;
}

//define this as a plug-in
DEFINE_FWK_MODULE(HcalEmptyEventFilter);