Example usage for javax.sound.midi Synthesizer close

Introduction

In this page you can find the example usage for javax.sound.midi Synthesizer close.

Prototype

@Override
void close();

Source Link

Document

Closes the device, indicating that the device should now release any system resources it is using.

Usage

From source file:Main.java

public static void streamMidiSequence(URL url)
        throws IOException, InvalidMidiDataException, MidiUnavailableException {
    Sequencer sequencer = null; // Converts a Sequence to MIDI events
    Synthesizer synthesizer = null; // Plays notes in response to MIDI events

    try {/*from   w  w  w  .java  2s. c o  m*/
        // Create, open, and connect a Sequencer and Synthesizer
        // They are closed in the finally block at the end of this method.
        sequencer = MidiSystem.getSequencer();
        sequencer.open();
        synthesizer = MidiSystem.getSynthesizer();
        synthesizer.open();
        sequencer.getTransmitter().setReceiver(synthesizer.getReceiver());

        // Specify the InputStream to stream the sequence from
        sequencer.setSequence(url.openStream());

        // This is an arbitrary object used with wait and notify to
        // prevent the method from returning before the music finishes
        final Object lock = new Object();

        // Register a listener to make the method exit when the stream is
        // done. See Object.wait() and Object.notify()
        sequencer.addMetaEventListener(new MetaEventListener() {
            public void meta(MetaMessage e) {
                if (e.getType() == END_OF_TRACK) {
                    synchronized (lock) {
                        lock.notify();
                    }
                }
            }
        });

        // Start playing the music
        sequencer.start();

        // Now block until the listener above notifies us that we're done.
        synchronized (lock) {
            while (sequencer.isRunning()) {
                try {
                    lock.wait();
                } catch (InterruptedException e) {
                }
            }
        }
    } finally {
        // Always relinquish the sequencer, so others can use it.
        if (sequencer != null)
            sequencer.close();
        if (synthesizer != null)
            synthesizer.close();
    }
}

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