PayloadDecoder.h

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// Copyright 2019-2020 CERN and copyright holders of ALICE O2.
// See https://alice-o2.web.cern.ch/copyright for details of the copyright holders.
// All rights not expressly granted are reserved.
//
// This software is distributed under the terms of the GNU General Public
// License v3 (GPL Version 3), copied verbatim in the file "COPYING".
//
// In applying this license CERN does not waive the privileges and immunities
// granted to it by virtue of its status as an Intergovernmental Organization
// or submit itself to any jurisdiction.
 
#ifndef O2_MCH_RAW_PAYLOAD_DECODER_H
#define O2_MCH_RAW_PAYLOAD_DECODER_H
 
#include "Headers/RAWDataHeader.h"
#include "MCHRawDecoder/DecodedDataHandlers.h"
#include "MCHRawDecoder/PageDecoder.h"
#include <map>
#include <cstdlib>
#include <gsl/span>
 
namespace o2
{
namespace mch
{
namespace raw
{
bool hasOrbitJump(uint32_t orb1, uint32_t orb2)
{
  return std::abs(static_cast<long int>(orb1 - orb2)) > 1;
}
 
using Payload = Page;
 
 
template <typename T>
class PayloadDecoder
{
 public:
  PayloadDecoder(DecodedDataHandlers decodedDataHandlers);
 
  size_t process(uint32_t orbit, Payload payload);
 
 private:
  uint32_t mOrbit;
  DecodedDataHandlers mDecodedDataHandlers;
};
 
template <typename T>
PayloadDecoder<T>::PayloadDecoder(DecodedDataHandlers decodedDataHandlers)
  : mDecodedDataHandlers(decodedDataHandlers)
{
}
 
template <typename T>
size_t PayloadDecoder<T>::process(uint32_t orbit, Payload payload)
{
  if (hasOrbitJump(orbit, mOrbit)) {
    static_cast<T*>(this)->reset();
  }
  mOrbit = orbit;
  return static_cast<T*>(this)->append(payload);
}
 
} // namespace raw
} // namespace mch
} // namespace o2
 
#endif