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/*
* TDirectSynthesizer.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 2004 by Matthias Pfisterer
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library General Public License as published
* by the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
/*
|<--- this code is formatted to fit into 80 columns --->|
*/
package org.tritonus.share.midi;
import javax.sound.midi.MidiChannel;
import javax.sound.midi.MidiDevice;
import javax.sound.midi.MidiMessage;
import javax.sound.midi.ShortMessage;
import javax.sound.midi.Synthesizer;
/**
* Base class for Synthesizer implementations.
*
*
* This base class is for Synthesizer implementations that do not itself operate
* on MIDI, but instread implement the MidiChannel interface. For these
* implementations, MIDI behaviour is simulated on top of MidiChannel.
*
*
* @see javax.sound.midi.MidiChannel
*
* @author Matthias Pfisterer
*/
public abstract class TDirectSynthesizer
extends TMidiDevice
implements Synthesizer
{
/** Initialize this class.
* This sets the info from the passed one, sets the open status
* to false, the number of Receivers to zero and the collection
* of Transmitters to be empty.
*
* @param info The info object that describes this instance.
*/
public TDirectSynthesizer(MidiDevice.Info info)
{
// no Transmitters, only Receivers
super(info, false, true);
}
/**
* Obtains the MidiChannel with the specified number.
*
* @param nChannel the requested channel number (0..15)
* @return the respective MidiChannel object
*/
private MidiChannel getChannel(int nChannel)
{
return getChannels()[nChannel];
}
/**
* Handles MIDI messages coming in from Receivers.
*
*/
protected void receive(MidiMessage message, long lTimeStamp)
{
if (message instanceof ShortMessage)
{
ShortMessage shortMsg = (ShortMessage) message;
int nChannel = shortMsg.getChannel();
int nCommand = shortMsg.getCommand();
int nData1 = shortMsg.getData1();
int nData2 = shortMsg.getData2();
switch (nCommand)
{
case ShortMessage.NOTE_OFF:
getChannel(nChannel).noteOff(nData1, nData2);
break;
case ShortMessage.NOTE_ON:
getChannel(nChannel).noteOn(nData1, nData2);
break;
case ShortMessage.POLY_PRESSURE:
getChannel(nChannel).setPolyPressure(nData1, nData2);
break;
case ShortMessage.CONTROL_CHANGE:
getChannel(nChannel).controlChange(nData1, nData2);
break;
case ShortMessage.PROGRAM_CHANGE:
getChannel(nChannel).programChange(nData1);
break;
case ShortMessage.CHANNEL_PRESSURE:
getChannel(nChannel).setChannelPressure(nData1);
break;
case ShortMessage.PITCH_BEND:
getChannel(nChannel).setPitchBend(nData1 | (nData2 << 7));
break;
default:
}
}
}
}
/*** TDirectSynthesizer.java ***/