fluidsynth_simple.c

A basic example of using fluidsynth to play a single note

/* FluidSynth Simple - An example of using fluidsynth
 *
 * This code is in the public domain.
 *
 * To compile:
 *   gcc -g -O -o fluidsynth_simple fluidsynth_simple.c -lfluidsynth
 *
 * To run
 *   fluidsynth_simple soundfont
 *
 * [Peter Hanappe]
 */


#include <stdio.h>
#include <fluidsynth.h>

int main(int argc, char** argv) 
{
        fluid_settings_t* settings;
        fluid_synth_t* synth = NULL;
        fluid_audio_driver_t* adriver = NULL;
        int err = 0;

        if (argc != 2) {
                fprintf(stderr, "Usage: fluidsynth_simple [soundfont]\n");
                return 1;
        }

        /* Create the settings object. This example uses the default
         * values for the settings. */
        settings = new_fluid_settings();
        if (settings == NULL) {
                fprintf(stderr, "Failed to create the settings\n");
                err = 2;
                goto cleanup;
        }
  
        /* Create the synthesizer */
        synth = new_fluid_synth(settings);
        if (synth == NULL) {
                fprintf(stderr, "Failed to create the synthesizer\n");
                err = 3;
                goto cleanup;
        }

        /* Load the soundfont */
        if (fluid_synth_sfload(synth, argv[1], 1) == -1) {
                fprintf(stderr, "Failed to load the SoundFont\n");
                err = 4;
                goto cleanup;
        }

        /* Create the audio driver. As soon as the audio driver is
         * created, the synthesizer can be played. */
        adriver = new_fluid_audio_driver(settings, synth);
        if (adriver == NULL) {
                fprintf(stderr, "Failed to create the audio driver\n");
                err = 5;
                goto cleanup;
        }

        /* Play a note */
        fluid_synth_noteon(synth, 0, 60, 100);

        printf("Press \"Enter\" to stop: ");
        fgetc(stdin);
        printf("done\n");

        
 cleanup:
        
        if (adriver) {
                delete_fluid_audio_driver(adriver);
        }
        if (synth) {
                delete_fluid_synth(synth);
        }
        if (settings) {
                delete_fluid_settings(settings);
        }
        
        return err;
}