/**
* The main loop of the jukebox. Waits for the end of the song (while updating
* the timer) and then returns an indicator that we need the next song.
* Also waits for keypresses; the user can press ESC, left arrow or right arrow
* to trigger appropriate return codes.
*/
int jukebox_loop() {
int key_p;
while (TRUE) {
while (keypressed()) {
key_p = readkey() >> 8;
if (key_p == KEY_ESC) {
return JUKEBOX_EXIT;
}
if (key_p == KEY_LEFT) {
return JUKEBOX_PREV_SONG;
}
if (key_p == KEY_RIGHT) {
return JUKEBOX_NEXT_SONG;
}
}
clear_bitmap(buffer);
update_starfield(buffer);
update_track_data();
update_song_data();
draw_help();
vsync();
blit(buffer, screen, 0, 0, 0, 0, SCREEN_W, SCREEN_H);
// When we're at the end of the file, midi_pos will be set to
// the negative number of beats in the song.
if (midi_pos < 0) {
rest(TRACK_CHANGE_WAIT);
return JUKEBOX_NEXT_SONG;
}
}
}
void update()
{
update_starfield(stars, get_ship_rotation(ship));
update_ship(ship);
}