The quickest recording of a range of events

The quickest recording of a range of events

Hello Prophesee Team,
I want to write some amounts of events (200ms, several pipeline slices) before a dynamically calculated point in time. I am always saving last 5 pointers of event buffers to deque, and use it to write events when I need it.
WriteCSV() works, but I want to do that quicker, so I tried to write in the .RAW file, and have problems with the WriteRAW().
The .raw file is created, but it is not loaded in the Metavision studio,
metavision_file_to_dat.exe has many NonMonotonicTimeHigh and InvalidVectBase errors.

and the metavision_evt2_raw_file_decoder.exe and metavision_evt3_raw_file_decoder.exe both create the output file with garbage values.

for the writing I have used code in the openeb/.../i_events_stream.cpp

  1. ofs.write(reinterpret_cast<char*>(buffer->data()), size * sizeof(Metavision::I_EventsStream::RawData));

Do you see any problems in this code:

  1. EventsWriter::EventsWriter(Metavision::Camera& camera)
  2. {
  3.     header = camera.get_device().get_facility<Metavision::I_HW_Identification>()->get_header();
  4.     header.add_date();
  5. }

  7. bool EventsWriter::AddSlice(EventBufferPtr buffer)
  8. {
  9.     buffers_deque.push_back(buffer);

  11.     if (buffers_deque.size() > buffers_amount)
  12.         buffers_deque.pop_front();

  14.     return true;
  15. }

  17. bool EventsWriter::WriteCSV()
  18. {
  19.     if (!buffers_deque.empty())
  20.     {
  21.         auto start = buffers_deque.front()->front().t;
  22.         auto end = buffers_deque.back()->back().t;
  23.         std::ostringstream ss;

  25.         for (auto& buffer : buffers_deque)
  26.             for (auto& evt : *buffer)
  27.                 ss << evt.t << "," << evt.x << "," << evt.y << "," << evt.p << "\n";

  29.         std::stringstream filename;
  30.         filename << start << "-" << end << ".csv";
  31.         std::ofstream ofs(filename.str());
  32.         ofs << ss.str();
  33.     }
  34.     return true;
  35. }

  37. bool EventsWriter::WriteRAW()
  38. {
  39.     if (!buffers_deque.empty())
  40.     {
  41.         auto start = buffers_deque.front()->front().t;
  42.         auto end = buffers_deque.back()->back().t;

  44.         std::stringstream filename;
  45.         filename << start << "-" << end << ".raw";
  46.         std::ofstream ofs(filename.str());
  47.         ofs << header;

  49.         for (auto& buffer : buffers_deque)
  50.         {
  51.             auto size = buffer->size();
  52.             ofs.write(reinterpret_cast<char*>(buffer->data()), size * sizeof(Metavision::I_EventsStream::RawData));
  53.         }
  54.         ofs.close();
  55.         ofs.clear();
  56.     }
  57.     return true;
  58. }



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