esdclip.java

linux下建立JAVA虚拟机的源码KAFFE

/*
 *	EsdClip.java
 */

/*
 *  Copyright (c) 1999 by Matthias Pfisterer <[e-mail]>
 *
 *
 *   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.
 *
 */


package	org.tritonus.sampled.mixer.esd;


import java.io.ByteArrayInputStream;
import java.io.IOException;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;

import org.tritonus.lowlevel.esd.Esd;
import org.tritonus.lowlevel.esd.EsdSample;
import org.tritonus.share.TDebug;
import org.tritonus.share.sampled.mixer.TDataLine;
import org.tritonus.share.sampled.mixer.TMixer;



public class EsdClip
	extends	TDataLine
	implements	Clip
{
	private static final Class[]	CONTROL_CLASSES = {/*GainControl.class*/};
	private static final int	BUFFER_FRAMES = 16384;


	private Mixer		m_mixer;
	private EsdSample	m_esdSample;



	public EsdClip(TMixer mixer)
	{
		super(mixer, null);
		m_mixer = mixer;
		m_esdSample = new EsdSample();
	}



	// interface Clip
	public void open(AudioFormat audioFormat, byte[] abData, int nOffset, int nNumFrames)
		throws	LineUnavailableException
	{
		int	nBufferLength = nNumFrames * audioFormat.getFrameSize();
		// TODO: check if nOffset + nBufferLength <= abData.length
		// perhaps truncate automatically
		ByteArrayInputStream	bais = new ByteArrayInputStream(abData, nOffset, nBufferLength);
		try
		{
			AudioInputStream	audioInputStream = new AudioInputStream(bais, audioFormat, nNumFrames);
			open(audioInputStream);
		}
		catch (IOException e)
		{
			if (TDebug.TraceAllExceptions)
			{
				TDebug.out(e);
			}
			throw new LineUnavailableException();
		}
	}



	public void open(AudioInputStream audioInputStream)
		throws	LineUnavailableException, IOException
	{
		AudioFormat	audioFormat = audioInputStream.getFormat();
		// TOOD:
		DataLine.Info	info = new DataLine.Info(Clip.class,
							 audioFormat, -1/*nBufferSize*/);
		setLineInfo(info);
		int	nFrameSize = audioFormat.getFrameSize();
		long	lTotalLength = audioInputStream.getFrameLength() * nFrameSize;
		int	nFormat = Esd.ESD_STREAM | Esd.ESD_PLAY | EsdUtils.getEsdFormat(audioFormat);
		if (TDebug.TraceClip)
		{
			TDebug.out("format: " + nFormat);
			TDebug.out("sample rate: " + audioFormat.getSampleRate());
		}
		m_esdSample.open(nFormat, (int) audioFormat.getSampleRate(), (int) lTotalLength);
		if (TDebug.TraceClip)
		{
			TDebug.out("size in esd: " + audioInputStream.getFrameLength() * nFrameSize);
		}
		int	nBufferLength = BUFFER_FRAMES * nFrameSize;
		byte[]	abData = new byte[nBufferLength];
		int	nBytesRead = 0;
		int	nTotalBytes = 0;
		while (nBytesRead != -1)
		{
			try
			{
				nBytesRead = audioInputStream.read(abData, 0, abData.length);
			}
			catch (IOException e)
			{
				if (TDebug.TraceClip || TDebug.TraceAllExceptions)
				{
					TDebug.out(e);
				}
			}
			if (nBytesRead >= 0)
			{
				nTotalBytes += nBytesRead;
				if (TDebug.TraceClip)
				{
					TDebug.out("EsdClip.open(): total bytes: " + nTotalBytes);
					TDebug.out("EsdClip.open(): Trying to write: " + nBytesRead);
				}
				int	nBytesWritten = m_esdSample.write(abData, 0, nBytesRead);
				if (TDebug.TraceClip)
				{
					TDebug.out("EsdClip.open(): Written: " + nBytesWritten);
				}
			}
		}
		// to trigger the events
		open();
	}



	public int getFrameLength()
	{
		// TODO:
		return -1;
	}



	public long getMicrosecondLength()
	{
		// TODO:
		return -1;
	}



	public void setFramePosition(int nPosition)
	{
		// TOOD:
	}



	public void setMicrosecondPosition(long lPosition)
	{
		// TOOD:
	}



	public int getFramePosition()
	{
		// TOOD:
		return -1;
	}



	public long getMicrosecondPosition()
	{
		// TOOD:
		return -1;
	}



	public void setLoopPoints(int nStart, int nEnd)
	{
		// TOOD:
	}



	public void loop(int nCount)
	{
		if (TDebug.TraceClip)
		{
			TDebug.out("EsdClip.loop(int): called; count = " + nCount);
		}
		if (false/*isStarted()*/)
		{
			/*
			 *	only allow zero count to stop the looping
			 *	at the end of an iteration.
			 */
			if (nCount == 0)
			{
				if (TDebug.TraceClip)
				{
					TDebug.out("EsdClip.loop(int): stopping sample");
				}
				m_esdSample.stop();
			}
		}
		else
		{
			if (nCount == 0)
			{
				if (TDebug.TraceClip)
				{
					TDebug.out("EsdClip.loop(int): starting sample (once)");
				}
				m_esdSample.play();
			}
			else
			{
				/*
				 *	we're ignoring the count, because esd
				 *	cannot loop for a fixed number of
				 *	times.
				 */
				// TDebug.out("hallo");
				if (TDebug.TraceClip)
				{
					TDebug.out("EsdClip.loop(int): starting sample (forever)");
				}
				m_esdSample.loop();
			}
		}
		// TOOD:
	}



	public void flush()
	{
		// TOOD:
	}



	public void drain()
	{
		// TOOD:
	}



	public void close()
	{
		m_esdSample.free();
		m_esdSample.close();
		// TOOD:
	}




	public void open()
	{
		// TODO:
	}



	public void start()
	{
		if (TDebug.TraceClip)
		{
			TDebug.out("EsdClip.start(): called");
		}
		/*
		 *	This is a hack. What start() really should do is
		 *	start playing at the position playback was stopped.
		 */
		if (TDebug.TraceClip)
		{
			TDebug.out("EsdClip.start(): calling 'loop(0)' [hack]");
		}
		loop(0);
	}



	public void stop()
	{
		// TODO:
		m_esdSample.kill();
	}


	/*
	 *	This method is enforced by DataLine, but doesn't make any
	 *	sense for Clips.
	 */
	public int available()
	{
		return -1;
	}



}



/*** EsdClip.java ***/