I have run into a problem with JFugue 5.0.7: I'm coding a realtime application that plays music indefinitely, but the RealtimePlayer provided by the jfugue library mixes instruments with each other.
I have the following code
public class HelloJFugue {
public static int BPM = 150;
public static int SIGNATURE = 3;
public static boolean RANDOM = false;
public static void main(String[] args) throws MidiUnavailableException {
RealtimePlayer player = new RealtimePlayer();
BlockingQueue<Pattern> queue = new SynchronousQueue<>();
List<PatternProducer> pProducers = createPatternProducers();
Thread pConsumer = new Thread(new PatternConsumer(player, queue));
Thread pProducer = new Thread(new PatternMediator(queue, pProducers));
pConsumer.start();
pProducer.start();
}
private static List<PatternProducer> createPatternProducers() {
Random rand = new Random();
PatternProducer rightHand = new PatternProducer() {
int counter = 0;
String[] patterns = {
"Rq Rq E6i D#6i",
"E6i D#6i E6i B5i D6i C6i",
"A5q Ri C5i E5i A5i",
"B5q Ri E5i G#5i B5i",
"C6q Ri E5i E6i D#6i",
"E6i D#6i E6i B5i D6i C6i",
"A5q Ri C5i E5i A5i",
"B5q Ri E5i C6i B5i",
"A5q Ri E5i E6i D#6i"
};
@Override
public Pattern getPattern() {
Pattern p = new Pattern(patterns[RANDOM ? rand.nextInt(patterns.length - 1) + 1 : counter])
.setVoice(0)
.setInstrument("Piano");
counter++;
if (counter >= patterns.length) {
counter = 1;
}
return p;
}
};
PatternProducer leftHand = new PatternProducer() {
int counter = 0;
String[] patterns = {
"Rq Rq Rq",
"Rq Rq Rq",
"A3i E4i A4i Ri Rq",
"E3i E4i G#4i Ri Rq",
"A3i E4i A4i Ri Rq",
"Rq Rq Rq",
"A3i E4i A4i Ri Rq",
"E3i E4i G#4i Ri Rq",
"A3i E4i A4i Ri Rq"
};
@Override
public Pattern getPattern() {
Pattern p = new Pattern(patterns[RANDOM ? rand.nextInt(patterns.length - 1) + 1 : counter])
.setVoice(1)
.setInstrument("Guitar");
counter++;
if (counter >= patterns.length) {
counter = 1;
}
return p;
}
};
return new ArrayList<PatternProducer>() {
{
add(rightHand);
add(leftHand);
}
};
}
}
public class PatternMediator implements Runnable {
private BlockingQueue<Pattern> queue;
private List<PatternProducer> producers;
public PatternMediator(BlockingQueue<Pattern> queue, List<PatternProducer> producers) {
this.queue = queue;
this.producers = producers;
}
private void fillQueue() throws InterruptedException {
Pattern p = new Pattern();
for (PatternProducer producer : producers) {
p.add(producer.getPattern().setTempo(HelloJFugue.BPM));
}
this.queue.put(p);
}
@Override
public void run() {
while (true) {
try {
fillQueue();
} catch (InterruptedException ex) {
Logger.getLogger(PatternMediator.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
public class PatternConsumer implements Runnable {
private RealtimePlayer player;
private BlockingQueue<Pattern> queue;
public PatternConsumer(RealtimePlayer player, BlockingQueue<Pattern> queue) {
this.player = player;
this.queue = queue;
}
private void playFromQueue() throws InterruptedException {
player.play(queue.take());
}
@Override
public void run() {
while (true) {
try {
playFromQueue();
Thread.sleep(HelloJFugue.SIGNATURE * 60000 / HelloJFugue.BPM);
} catch (InterruptedException ex) {
Logger.getLogger(PatternConsumer.class.getName()).log(Level.SEVERE, null, ex);
}
}
}
}
The problem is that, when playing the two instruments (guitar and piano) get mixed, and the two cannot be played simultanously. Instead the player changes between the two instruments haphazardly, so that only one instrument, playing both patterns, can be heard at one time.
