public synchronized void init() throws MidiUnavailableException {
if (unusedChannels != null) return;
if (synthesizer == null) synthesizer = MidiSystem.getSynthesizer();
if (!synthesizer.isOpen()) synthesizer.open();
MidiChannel[] chn = synthesizer.getChannels();
playTasks = new ArrayList<PlayTask>();
if (receiver == null) receiver = synthesizer.getReceiver();
unusedChannels = new ArrayList<Integer>(chn.length);
for (int i = 0; i < chn.length; i++) if (i != 9) unusedChannels.add(i);
}
/** Stops all notes from playing on all MIDI channels. */
public static void allNotesOff(Synthesizer synth) {
try {
if (!synth.isOpen()) {
synth.open();
}
MidiChannel[] channels = synth.getChannels();
for (int i = 0; i < channels.length; i++) {
channels[i].allNotesOff();
}
} catch (MidiUnavailableException e) {
throw new JFugueException(JFugueException.GENERAL_ERROR);
}
}
/**
* Returns an instance of a Sequencer that uses the provided Synthesizer as its receiver. This is
* useful when you have made changes to a specific Synthesizer--for example, you've loaded in new
* patches--that you want the Sequencer to use. You can then pass the Sequencer to the Player
* constructor.
*
* @param synth The Synthesizer to use as the receiver for the returned Sequencer
* @return a Sequencer with the provided Synthesizer as its receiver
* @throws MidiUnavailableException
* @version 4.0
*/
public static Sequencer getSequencerConnectedToSynthesizer(Synthesizer synth)
throws MidiUnavailableException {
Sequencer sequencer = MidiSystem.getSequencer(false); // Get Sequencer
// which is not
// connected to
// new
// Synthesizer.
sequencer.open();
if (!synth.isOpen()) {
synth.open();
}
sequencer.getTransmitter().setReceiver(synth.getReceiver()); // Connect
// the
// Synthesizer
// to
// our
// synthesizer
// instance.
return sequencer;
}