Playing a MIDI file from memory

FluidSynth can be also play MIDI files directly from a buffer in memory. If you need to play a file from a stream (such as stdin, a network, or a high-level file interface), you can load the entire file into a buffer first, and then use this approach. Use the same technique as above, but rather than calling fluid_player_add(), load it into memory and call fluid_player_add_mem() instead. Once you have passed a buffer to fluid_player_add_mem(), it is copied, so you may use it again or free it immediately (it is your responsibility to free it if you allocated it).

#include <stdlib.h>
#include <string.h>
#include <fluidsynth.h>
 
/* An example midi file */
const char MIDIFILE[] = {
    0x4d, 0x54, 0x68, 0x64, 0x00, 0x00, 0x00, 0x06,
    0x00, 0x01, 0x00, 0x01, 0x01, 0xe0, 0x4d, 0x54,
    0x72, 0x6b, 0x00, 0x00, 0x00, 0x20, 0x00, 0x90,
    0x3c, 0x64, 0x87, 0x40, 0x80, 0x3c, 0x7f, 0x00,
    0x90, 0x43, 0x64, 0x87, 0x40, 0x80, 0x43, 0x7f,
    0x00, 0x90, 0x48, 0x64, 0x87, 0x40, 0x80, 0x48,
    0x7f, 0x83, 0x60, 0xff, 0x2f, 0x00
};
 
int main(int argc, char** argv)
{
    int i;
    void* buffer;
    size_t buffer_len;
    fluid_settings_t* settings;
    fluid_synth_t* synth;
    fluid_player_t* player;
    fluid_audio_driver_t* adriver;
    settings = new_fluid_settings();
    synth = new_fluid_synth(settings);
    player = new_fluid_player(synth);
    adriver = new_fluid_audio_driver(settings, synth);
    /* process command line arguments */
    for (i = 1; i < argc; i++) {
        if (fluid_is_soundfont(argv[i])) {
           fluid_synth_sfload(synth, argv[1], 1);
        }
    }
    /* queue up the in-memory midi file */
    fluid_player_add_mem(player, MIDIFILE, sizeof(MIDIFILE));
    /* play the midi file */
    fluid_player_play(player);
    /* wait for playback termination */
    fluid_player_join(player);
    /* cleanup */
    delete_fluid_audio_driver(adriver);
    delete_fluid_player(player);
    delete_fluid_synth(synth);
    delete_fluid_settings(settings);
    return 0;
}