ICandidateHitFinder.h

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///////////////////////////////////////////////////////////////////////
///
/// \file   ICandidateHitFinder.h
///
/// \brief  This provides an interface for tools which are tasked with
///         finding candidate hits on input waveforms
///
/// \author T. Usher
///
////////////////////////////////////////////////////////////////////////

#ifndef ICandidateHitFinder_H
#define ICandidateHitFinder_H

#include "fhiclcpp/ParameterSet.h"
#include "lardataobj/RecoBase/Wire.h"

namespace reco_tool {
  class ICandidateHitFinder {
  public:
    virtual ~ICandidateHitFinder() noexcept = default;

    // Define a structure to contain hits
    struct HitCandidate {
      size_t startTick;
      size_t stopTick;
      size_t maxTick;
      size_t minTick;
      float maxDerivative;
      float minDerivative;
      float hitCenter;
      float hitSigma;
      float hitHeight;
    };

    using HitCandidateVec = std::vector<HitCandidate>;
    using MergeHitCandidateVec = std::vector<HitCandidateVec>;

    using Waveform = std::vector<float>;

    // Search for candidate hits on the input waveform
    virtual void findHitCandidates(
      const recob::Wire::RegionsOfInterest_t::datarange_t&, // Waveform (with range info) to analyze
      const size_t,                                         // waveform start tick
      const size_t,                                         // channel #
      const size_t,                                         // Event count (for histograms)
      HitCandidateVec&) const = 0;                          // output candidate hits

    virtual void MergeHitCandidates(const recob::Wire::RegionsOfInterest_t::datarange_t&,
                                    const HitCandidateVec&,
                                    MergeHitCandidateVec&) const = 0;
  };
}

#endif