/**
* Import a song into the MidiExporter to play or export.
*
* @param song The Song to convert to MIDI
*/
public void importSong(Song song) {
// Fetch important data from the song.
// Meaning, metadata and the song itself.
Beat[] beats = song.getBeatArray();
this.song = song;
// Create a track for each voice.
int numVoices = song.getNumVoices();
for (int voiceCount = 0; voiceCount < numVoices; voiceCount++) {
sequence.createTrack();
}
// Iterate through each beat, adding each note to the corresponding
// track.
Track[] tracks = sequence.getTracks();
for (int beat = 0; beat < beats.length; beat++) {
Note[] firstHalf = beats[beat].getNotesFirstHalf();
Note[] secondHalf = beats[beat].getNotesSecondHalf();
// Iterate through each note in the beat, adding it to the
// corresponding track.
for (int note = 0; note < firstHalf.length; note++) {
if (firstHalf[note] == secondHalf[note]) {
createNote(firstHalf[note], 2 * beat, 2, tracks[note]);
} else {
createNote(firstHalf[note], 2 * beat, 1, tracks[note]);
createNote(secondHalf[note], 2 * beat + 1, 1, tracks[note]);
} // if/else
} // for
} // for
try {
setUpSequencer();
} catch (MidiUnavailableException ex) {
System.out.println("Unable to set up sequencer");
// do nothing
}
}
/** Gets the default transmitter and receiver, and then links them. */
private void linkTransmitterToReceiver() {
try {
// Set up the sequencer (including its tempo)
sequencer.open();
sequencer.setSequence(sequence);
sequencer.setTempoInBPM(song.getBPM());
// Get the system's default synthesizer and set that up, too.
Synthesizer synth = MidiSystem.getSynthesizer();
synth.open();
// Get the receiver and transmitter to use and set those up.
Receiver receiver = synth.getReceiver();
Transmitter transmitter = sequencer.getTransmitter();
transmitter.setReceiver(receiver);
} catch (Exception ex) {
// Something went wrong.
ex.printStackTrace();
System.exit(1);
}
}