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/*
* Copyright 2010 Phil Burk, Mobileer Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.jsyn.midi;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiMessage;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Receiver;
import com.jsyn.devices.javasound.MidiDeviceTools;
import org.junit.jupiter.api.Test;
/**
* Connect a USB MIDI Keyboard to the internal MIDI Synthesizer using JavaSound.
*
* @author Phil Burk (C) 2010 Mobileer Inc
*/
public class TestMidiLoop {
@Test
private void midiLoop() {
try {
for (int result = 0, i = 0; i < 3 && result == 0; i++) {
result = test();
}
} catch (MidiUnavailableException | InterruptedException e) {
e.printStackTrace();
}
}
// Write a Receiver to get the messages from a Transmitter.
static class CustomReceiver implements Receiver {
@Override
public void close() {
System.out.print("Receiver.close() was called.");
}
@Override
public void send(MidiMessage message, long timeStamp) {
byte[] bytes = message.getMessage();
System.out.println("Got " + bytes.length + " bytes.");
}
}
public int test() throws MidiUnavailableException, InterruptedException {
int result = -1;
MidiDevice keyboard = MidiDeviceTools.findKeyboard();
Receiver receiver = new CustomReceiver();
// Just use default synthesizer.
if (keyboard != null) {
// If you forget to open them you will hear no sound.
keyboard.open();
// Put the receiver in the transmitter.
// This gives fairly low latency playing.
keyboard.getTransmitter().setReceiver(receiver);
System.out.println("Play MIDI keyboard: " + keyboard.getDeviceInfo().getDescription());
result = 0;
Thread.sleep(4000);
System.out.println("Close the keyboard. It may not work after this according to the docs!");
keyboard.close();
} else {
System.out.println("Could not find a keyboard.");
}
return result;
}
}
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