Function demonstrateMIDIFileIO

examples/midi_file_processing.cpp:89–145

}

void demonstrateMIDIFileIO()
{
    std::cout << "\n=== MIDI File I/O Demo ===\n";

    // Create a simple MIDI file in memory
    std::vector<uint8_t> midiData = {
        // MIDI file header
        'M', 'T', 'h', 'd',          // Chunk type
        0x00, 0x00, 0x00, 0x06,      // Chunk length
        0x00, 0x00,                  // Format type 0
        0x00, 0x01,                  // Number of tracks
        0x00, 0x60,                  // Ticks per quarter note (96)

        // Track header
        'M', 'T', 'r', 'k',          // Chunk type
        0x00, 0x00, 0x00, 0x0B,      // Chunk length

        // Track events
        0x00, 0x90, 0x3C, 0x40,      // Delta time 0, Note on C4, velocity 64
        0x60, 0x80, 0x3C, 0x40,      // Delta time 96, Note off C4, velocity 64
        0x00, 0xFF, 0x2F, 0x00       // End of track
    };

    try
    {
        choc::midi::File midiFile;
        midiFile.load (midiData.data(), midiData.size());

        std::cout << "Successfully loaded MIDI file\n";
        std::cout << "Number of tracks: " << midiFile.tracks.size() << "\n";
        std::cout << "Time format: " << midiFile.timeFormat << " ticks per quarter note\n";

        if (! midiFile.tracks.empty())
        {
            std::cout << "Track 1 has " << midiFile.tracks[0].events.size() << " events:\n";

            for (const auto& event : midiFile.tracks[0].events)
                std::cout << "  Tick " << event.tickPosition << ": " << event.message.getDescription() << "\n";
        }

        // Convert to sequence
        auto sequence = midiFile.toSequence();
        std::cout << "\nConverted to sequence with " << sequence.events.size() << " events\n";

        // Iterate through events with timing
        std::cout << "\nEvents with timing (assuming 120 BPM):\n";

        midiFile.iterateEvents ([](const choc::midi::LongMessage& msg, double timeInSeconds)
        {
            std::cout << "  Time " << timeInSeconds << "s: " << msg.getDescription() << "\n";
        });
    }
    catch (const std::runtime_error& e)
    {
        std::cout << "Error loading MIDI file: " << e.what() << "\n";
    }
}