Creating a real-time MIDI driver

FluidSynth can process real-time MIDI events received from hardware MIDI ports or other applications. To do so, the client must create a MIDI input driver. It is a very similar process to the creation of the audio driver: you initialize some properties in a settings instance and call the new_fluid_midi_driver() function providing a callback function that will be invoked when a MIDI event is received. The following MIDI drivers are currently supported:

• jack: JACK Audio Connection Kit MIDI driver (Linux, Mac OS X)
• oss: Open Sound System raw MIDI (Linux, Unix)
• alsa_raw: ALSA raw MIDI interface (Linux)
• alsa_seq: ALSA sequencer MIDI interface (Linux)
• winmidi: Microsoft Windows MM System (Windows)
• midishare: MIDI Share (Linux, Mac OS X)
• coremidi: Apple CoreMIDI (Mac OS X)

#include <fluidsynth.h>
 
int handle_midi_event(void* data, fluid_midi_event_t* event)
{
    printf("event type: %d\n", fluid_midi_event_get_type(event));
}
 
int main(int argc, char** argv)
{
    fluid_settings_t* settings;
    fluid_midi_driver_t* mdriver;
    settings = new_fluid_settings();
    mdriver = new_fluid_midi_driver(settings, handle_midi_event, NULL);
    /* ... */    
    delete_fluid_midi_driver(mdriver);
    return 0;
}

There are a number of general MIDI driver settings. The midi.driver setting defines the MIDI subsystem that will be used. There are additional settings for the MIDI subsystems used. For a full list of available midi driver settings, please refer to the MIDI driver settings documentation.