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Midi.java
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Midi.java
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package midi;
import java.util.LinkedList;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiDevice.Info;
/**
* Used for handling MIDI information
* @author Matthew
*
*/
public class Midi {
private DeviceBuilder deviceBuilder;
private LinkedList<Listener> listeners;
public Midi() {
deviceBuilder = new DeviceBuilder();
deviceBuilder.setup(this);
listeners = new LinkedList<Listener>();
}
public Midi(String device) {
deviceBuilder = new DeviceBuilder();
deviceBuilder.setup(this, device);
listeners = new LinkedList<Listener>();
}
/**
* Prints all device info
*/
public static void printDevices() {
Info[] info = MidiSystem.getMidiDeviceInfo();
for (Info i : info) {
System.out.println(i);
}
}
/**
* Adds a listener for MIDI messages
* @param l
*/
public void addListener(Listener l) {
if (l == null) {
throw new NullPointerException("Listener cannot be null.");
} else {
listeners.add(l);
}
}
/**
* Called when a note ON message is received
* @param note
*/
public void receivedOnMessage(Note note) {
for (Listener l : listeners) {
l.noteOn(note);
}
}
/**
* Called when a note OFF message is received
* @param note
*/
public void receivedOffMessage(Note note) {
for (Listener l : listeners) {
l.noteOff(note);
}
}
/**
* Called when a parameter (like a rotary) is changed
* @param value
*/
public void receivedParameterChange(byte value) {
for (Listener l : listeners) {
l.parameterChange(value);
}
}
/**
* Closes all opened devices
*/
public void close() {
deviceBuilder.close();
}
}