Function main

examples/midifile_dump.cpp:14–348

#include <vector>

int main(int argc, char** argv)
{
#if defined(_WIN32) && __has_include(<winrt/base.h>)
  // Necessary for using WinUWP and WinMIDI, must be done as early as possible in your main()
  winrt::init_apartment();
#endif

  if (argc < 2)
  {
    perror("Usage: ./midifile_dump <midifile.mid>");
    return 1;
  }

  // Read raw from a MIDI file
  std::ifstream file{argv[1], std::ios::binary};
  if (!file.is_open())
  {
    std::cerr << "Could not open " << argv[1] << std::endl;
    return 1;
  }

  std::vector<uint8_t> bytes;
  bytes.assign(std::istreambuf_iterator<char>(file), std::istreambuf_iterator<char>());

  // Initialize our reader object
  libremidi::reader r{true};

  // Parse
  libremidi::reader::parse_result result = r.parse(bytes);

  switch (result)
  {
    case libremidi::reader::validated:
      std::cout << "\nParsing validated\n\n";
      // Parsing has succeeded, all the input data is correct MIDI.
      break;

    case libremidi::reader::complete:
      std::cout << "\nParsing complete\n\n";
      // All the input data is parsed but the MIDI file was not necessarily strict SMF
      // (e.g. there are empty tracks or tracks without END OF TRACK)
      break;

    case libremidi::reader::incomplete:
      std::cout << "\nParsing incomplete\n\n";
      // Not all the input could be parsed. For instance a track could not be read.
      break;

    case libremidi::reader::invalid:
      std::cout << "\nParsing invalid\n\n";
      // Nothing could be parsed, this is not MIDI data or we do not support it yet.
      return 1;
  }

  if (result != libremidi::reader::invalid)
  {
    long beatDuration = (long)(60. * 1'000'000. / r.startingTempo);    // [usecs]
    long tickDuration = beatDuration / r.ticksPerBeat;                 // [usecs]