short allegro music example.

allegro_music_test.c

/// gcc allegro_music_test.c -o player -Wall -lallegro -lallegro_audio -lallegro_acodec

#include <stdio.h>
#include <stdbool.h>
#include <assert.h>
#include <allegro5/allegro5.h>
#include <allegro5/allegro_audio.h>
#include <allegro5/allegro_acodec.h>

int main(int argc, char *argv[])
{
    if (argc < 2)
    {
        fprintf(stdout, "usage: %s song.ogg\n", argv[0]);
        return -1;
    }

    bool result = 0;

    result = al_init();
    assert(result);

    result = al_install_audio();
    assert(result);

    result = al_init_acodec_addon();
    assert(result);

    ALLEGRO_DISPLAY * display = al_create_display(256,256);
    assert(display);

    result = al_reserve_samples(2);
    assert(result);

    ALLEGRO_AUDIO_STREAM *stream = al_load_audio_stream(argv[1], 2, 2048);
    assert(stream);

    result = al_set_audio_stream_playmode(stream, ALLEGRO_PLAYMODE_LOOP);
    assert(result);

    result = al_attach_audio_stream_to_mixer(stream, al_get_default_mixer());
    assert(result);

    ALLEGRO_EVENT_QUEUE * queue = al_create_event_queue();
    assert(queue);

    al_register_event_source(queue, al_get_display_event_source(display));

    bool quit = false;
    while (quit == false)
    {
        ALLEGRO_EVENT e;
        while (al_get_next_event(queue, &e))
        {
            if (e.type == ALLEGRO_EVENT_DISPLAY_CLOSE)
            {
                quit = true;
            }
        }

        al_rest(1.0 / 60);
    }

    al_destroy_audio_stream(stream);
    al_destroy_display(display);
    al_uninstall_audio();

    return 0;
}