@Override
public void render(double timestamp) {
Objects.requireNonNull(this.model);
try {
int beatNum = (int) Math.round((timestamp / 60.0) * model.getTempo());
for (Link link : model.getLinks(beatNum)) {
if (link.getPlayIteration() == model.getIteration()) {
model.setCurrentTime(link.getLinkedBeat() * 60.0 / model.getTempo());
model.setIteration(model.getIteration() + 1);
return;
}
}
if (beatNum != this.lastBeat) {
this.playNotes(beatNum);
this.lastBeat = beatNum;
}
} catch (InvalidMidiDataException e) {
}
}
/** Renders the MidiView based on the given model, by playing all of the notes in the model */
private void playNotes(int beat) throws InvalidMidiDataException {
for (Playable p : this.model.getNotes(beat)) {
if (p.getStartBeat() == beat) {
MidiMessage start =
new ShortMessage(
ShortMessage.NOTE_ON,
p.getInstrumentID() - 1,
Pitch.getMidi(p.getPitch(), p.getOctave()),
100);
this.receiver.send(start, p.getStartBeat() * (60000000 / model.getTempo()));
}
if (p.getStartBeat() + p.getDuration() == beat + 1) {
MidiMessage stop =
new ShortMessage(
ShortMessage.NOTE_OFF,
p.getInstrumentID() - 1,
Pitch.getMidi(p.getPitch(), p.getOctave()),
100);
this.receiver.send(
stop, (p.getStartBeat() + p.getDuration()) * (60000000 / model.getTempo()));
}
}
}
