DAPHNEEthFrame.hpp

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#ifndef FDDETDATAFORMATS_INCLUDE_FDDETDATAFORMATS_DAPHNEETHFRAME_HPP_
#define FDDETDATAFORMATS_INCLUDE_FDDETDATAFORMATS_DAPHNEETHFRAME_HPP_
 
#include "Utils.hpp"
 
#include "detdataformats/DAQEthHeader.hpp"
 
#include <algorithm> // For std::min
#include <cassert>   // For assert()
#include <cstdint>   // For uint32_t etc
#include <cstdio>
#include <cstdlib>
#include <stdexcept> // For std::out_of_range
 
namespace dunedaq::fddetdataformats {
 
// NOLINTBEGIN(build/unsigned)

class DAPHNEEthFrame
{
public:
  // The definition of the format is in terms of 64-bit words
  using word_t = uint64_t;
 
  // Dataframe format version
  static constexpr uint8_t version = 1;
 
  static constexpr int s_bits_per_adc = 14;
  static constexpr int s_bits_per_word = 8 * sizeof(word_t);
  static constexpr int s_num_adcs = 1024;
  static constexpr int s_num_adc_words = s_num_adcs * s_bits_per_adc / s_bits_per_word;
 
  struct Header
  {
    // The following bitfields constitute what could be considered "word_t w0;"
    word_t trig_sample : 14;
    word_t rsv_0 : 2;
    word_t threshold : 14;
    word_t rsv_1 : 2;
    word_t baseline : 14;
    word_t rsv_2 : 6;
    word_t version : 4;
    word_t channel : 8;
 
    word_t w1;
    word_t w2;
    word_t w3;
    word_t w4;
    word_t w5;
    word_t w6;
  };
  static_assert(sizeof(Header) == 7 * sizeof(word_t));
 
  detdataformats::DAQEthHeader daq_header;
  Header header;
  word_t adc_words[s_num_adc_words]; // NOLINT

  uint16_t get_adc(int i) const; // NOLINT

  void set_adc(int i, uint16_t val); // NOLINT

  uint64_t get_timestamp() const { return daq_header.get_timestamp(); }

  void set_timestamp(const uint64_t new_timestamp) { daq_header.timestamp = new_timestamp; }

  uint8_t get_channel() const { return header.channel; }

  void set_channel(const uint8_t new_channel) { header.channel = new_channel; }
};
static_assert(sizeof(DAPHNEEthFrame) == sizeof(detdataformats::DAQEthHeader) + sizeof(DAPHNEEthFrame::Header) +
                                          sizeof(DAPHNEEthFrame::word_t) * DAPHNEEthFrame::s_num_adc_words);
 
static_assert(std::endian::native == std::endian::little,
              "The DAPHNEEthFrame bitfield layout assumes little-endian architecture");
 
static_assert(std::is_trivially_copyable_v<DAPHNEEthFrame>,
              "DAPHNEEthFrame isn't trivially copyable and can't be safely std::memcpy'd");
static_assert(std::is_standard_layout_v<DAPHNEEthFrame>,
              "DAPHNEEthFrame isn't standard layout; reinterpret_cast and offsetof can't safely be used with it");
 
} // namespace dunedaq::fddetdataformats
 
#include "detail/DAPHNEEthFrame.hxx"
 
// NOLINTEND(build/unsigned)
 
#endif // FDDETDATAFORMATS_INCLUDE_FDDETDATAFORMATS_DAPHNEETHFRAME_HPP_