midi.java

非常好的java collapse游戏代码

/*
 * JCollapse - Java Collapse Game
 * Copyright (C) 2005 Erico Gon鏰lves Rimoli
 * 
 * This program 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 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 General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package sourceforge.net.projects.jcollapse.engine.sound;

import java.io.IOException;
import java.net.URL;

import javax.sound.midi.InvalidMidiDataException;
import javax.sound.midi.MidiSystem;
import javax.sound.midi.MidiUnavailableException;
import javax.sound.midi.Sequence;
import javax.sound.midi.Sequencer;

public class Midi extends Sound {
	private Sequencer m_Sequencer;
	private boolean m_Loop = false;
	
	/**
	 * Constructor for Midi objects
	 * @param local the local of Midi resource
	 */
	public Midi( URL local ) {
		this( local, false );
	}
	
	/**
	 * Constructor for Midi objects
	 * @param local the local of Midi resource
	 * @param loop if true, the sound play continuosly
	 */
	public Midi( URL local, boolean loop ) {
		super( local );
		setLoop( loop );
	}
	
	
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#initialize()
	 */
	public void initialize() throws SoundException {
		Sequence sequence;
		
		//if Sequencer is ok, return
		if( isInitialized() )
			return;
		
		try {
			sequence = MidiSystem.getSequence( getLocal() );
			m_Sequencer = MidiSystem.getSequencer();
			m_Sequencer.open();
			m_Sequencer.setSequence( sequence );
		}catch( InvalidMidiDataException ex1 ) {
			throw new SoundException( "Invalid midi data: " + getLocal().getFile(), ex1 );
		}catch( MidiUnavailableException ex1 ) {
			throw new SoundException( "Midi unavailable: " + getLocal().getFile(), ex1 );
		}catch( IOException ex1 ) {
			throw new SoundException( "IO error: : " + getLocal().getFile(), ex1 );
		}
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Sound#isInitialized()
	 */
	public boolean isInitialized() {
		return( m_Sequencer != null && m_Sequencer.isOpen() );
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#play()
	 */
	public void play() {
		m_Sequencer.setLoopCount( ( m_Loop ? -1 : 0 ) );
		m_Sequencer.setTickPosition( 0 );
        m_Sequencer.start();
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#pause()
	 */
	public void pause() {
		m_Sequencer.stop();
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#dispause()
	 */
	public void resume() {
		m_Sequencer.start();
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#stop()
	 */
	public void stop() {
		m_Sequencer.stop();
		m_Sequencer.setTickPosition( 0 );
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#release()
	 */
	public void release() {
		//if not initialized, return
		if( !isInitialized() )
			return;
		
		stop();
		m_Sequencer.close();
		m_Sequencer = null;
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#setLoop(boolean)
	 */
	public void setLoop( boolean loop ) {
		m_Loop = loop;
		
		if( isInitialized() ) {
			if( loop )
				m_Sequencer.setLoopCount( Sequencer.LOOP_CONTINUOUSLY );
			else
				m_Sequencer.setLoopCount( 0 );
		}
	}
	
	/* (non-Javadoc)
	 * @see sourceforge.net.projects.jcollapse.engine.sound.Playable#getSoundType()
	 */
	public int getSoundType() {
		return Playable.TYPE_MIDI;
	}
}