Subversion Repositories svn.mios

/*

 * @(#)VitualMidiDevice.java    beta8   2006/04/23

 *

 * Copyright (C) 2008    Adam King (adamjking@optusnet.com.au)

 *

 * This application is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 2 of the License, or

 * (at your option) any later version.

 *

 * This application is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this application; if not, write to the Free Software

 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

package org.midibox.midi;

import java.util.Iterator;

import java.util.LinkedList;

import java.util.List;

import java.util.Observable;

import javax.sound.midi.MidiDevice;

import javax.sound.midi.MidiMessage;

import javax.sound.midi.MidiUnavailableException;

import javax.sound.midi.Receiver;

import javax.sound.midi.Transmitter;

public class VirtualMidiDevice extends Observable implements MidiDevice {

    public static Object NAME = new Object();

    protected VirtualMidiDevice.Info info;

    protected int maxNoTransmitters;

    protected int maxNoReceivers;

    protected LinkedList transmitters;

    protected LinkedList receivers;

    protected Receiver midiInReceiver;

    protected Receiver midiOutReceiver;

    protected long timeStart = System.currentTimeMillis();

    public VirtualMidiDevice(String name, int maxNoTransmitters,

            int maxNoReceivers) {

        setName(name);

        this.maxNoTransmitters = maxNoTransmitters;

        this.maxNoReceivers = maxNoReceivers;

        this.transmitters = new LinkedList();

        this.receivers = new LinkedList();

        this.midiOutReceiver = new MidiOutReceiver();

    }

    public void setName(String name) {

        this.info = new VirtualMidiDevice.MyInfo(name, "midibox.org",

                "Virtual MIDI Device", "v1.0");

        setChanged();

        notifyObservers(NAME);

        clearChanged();

    }

    public void close() {

    }

    public int getMaxReceivers() {

        return maxNoReceivers;

    }

    public int getMaxTransmitters() {

        return maxNoTransmitters;

    }

    public long getMicrosecondPosition() {

        return (System.currentTimeMillis() - timeStart) * 1000;

    }

    public Receiver getReceiver() throws MidiUnavailableException {

        MyReceiver receiver = new MyReceiver();

        receivers.add(receiver);

        return receiver;

    }

    public List getTransmitters() {

        return (LinkedList) transmitters.clone();

    }

    public boolean isOpen() {

        return true;

    }

    public void open() throws MidiUnavailableException {

    }

    public List getReceivers() {

        return (LinkedList) receivers.clone();

    }

    public Receiver getMidiOutReceiver() {

        return midiOutReceiver;

    }

    public Receiver getMidiInReceiver() {

        return midiInReceiver;

    }

    public void setMidiInReceiver(Receiver midiInReceiver) {

        this.midiInReceiver = midiInReceiver;

    }

    public Transmitter getTransmitter() {

        MyTransmitter transmitter = new MyTransmitter();

        transmitters.add(transmitter);

        return transmitter;

    }

    public MidiDevice.Info getDeviceInfo() {

        return info;

    }

    public class MyReceiver implements Receiver {

        public void close() {

            synchronized (receivers) {

                receivers.remove(this);

            }

        }

        public void send(MidiMessage message, long timeStamp) {

            if (midiInReceiver != null) {

                midiInReceiver.send(message, timeStamp);

            }

        }

    }

    public class MyTransmitter implements Transmitter {

        protected Receiver receiver;

        public void close() {

            synchronized (transmitters) {

                transmitters.remove(this);

            }

        }

        public Receiver getReceiver() {

            return receiver;

        }

        public void setReceiver(Receiver receiver) {

            this.receiver = receiver;

        }

    }

    public class MyInfo extends MidiDevice.Info {

        protected MyInfo(String name, String vendor, String description,

                String version) {

            super(name, vendor, description, version);

        }

    }

    public class MidiOutReceiver implements Receiver {

        public void close() {

        }

        public void send(MidiMessage message, long timeStamp) {

            synchronized (transmitters) {

                Iterator it = transmitters.iterator();

                while (it.hasNext()) {

                    Transmitter transmitter = (Transmitter) it.next();

                    if (transmitter != null) {

                        Receiver receiver = transmitter.getReceiver();

                        if (receiver != null) {

                            receiver.send(message, timeStamp);

                        }

                    }

                }

            }

        }

    }

}