esdmixer.java

linux下建立JAVA虚拟机的源码KAFFE

/*
 *	EsdMixer.java
 */

/*
 *  Copyright (c) 1999, 2000 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.util.Arrays;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.Clip;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.Line;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.Mixer;
import javax.sound.sampled.SourceDataLine;
import javax.sound.sampled.TargetDataLine;

import org.tritonus.share.GlobalInfo;
import org.tritonus.share.TDebug;
import org.tritonus.share.sampled.mixer.TMixer;
import org.tritonus.share.sampled.mixer.TMixerInfo;
import org.tritonus.share.sampled.mixer.TSoftClip;




public class EsdMixer
extends TMixer
{
	// default buffer size in bytes.
	private static final int	DEFAULT_BUFFER_SIZE = 32768;

	private static AudioFormat[]	FORMATS =
	{
		// hack for testing.
		// new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, 11025/*AudioSystem.NOT_SPECIFIED*/, 16, 1, 2, 11025/*AudioSystem.NOT_SPECIFIED*/, false),
		// Formats supported directely by esd.
		new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, AudioSystem.NOT_SPECIFIED, 8, 1, 1, AudioSystem.NOT_SPECIFIED, true),
		new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, AudioSystem.NOT_SPECIFIED, 8, 1, 1, AudioSystem.NOT_SPECIFIED, false),
		new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, AudioSystem.NOT_SPECIFIED, 8, 2, 2, AudioSystem.NOT_SPECIFIED, true),
		new AudioFormat(AudioFormat.Encoding.PCM_UNSIGNED, AudioSystem.NOT_SPECIFIED, 8, 2, 2, AudioSystem.NOT_SPECIFIED, false),


		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 16, 1, 2, AudioSystem.NOT_SPECIFIED, false),
		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 16, 2, 4, AudioSystem.NOT_SPECIFIED, false),

		/*
		 *	Format supported through "simple" conversions.
		 *	"Simple" conversions are changes in the byte order
		 *	and changing signed/unsigned for 8 bit.
		 */

		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 8, 1, 1, AudioSystem.NOT_SPECIFIED, true),
		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 8, 1, 1, AudioSystem.NOT_SPECIFIED, false),
		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 8, 2, 2, AudioSystem.NOT_SPECIFIED, true),
		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 8, 2, 2, AudioSystem.NOT_SPECIFIED, false),

		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 16, 1, 2, AudioSystem.NOT_SPECIFIED, true),
		new AudioFormat(AudioFormat.Encoding.PCM_SIGNED, AudioSystem.NOT_SPECIFIED, 16, 2, 4, AudioSystem.NOT_SPECIFIED, true),
	};

	private static Line.Info[]	SOURCE_LINE_INFOS =
	{
		new DataLine.Info(SourceDataLine.class, FORMATS, AudioSystem.NOT_SPECIFIED, AudioSystem.NOT_SPECIFIED),
	};

	private static Line.Info[]	TARGET_LINE_INFOS =
	{
		new DataLine.Info(TargetDataLine.class, FORMATS, AudioSystem.NOT_SPECIFIED, AudioSystem.NOT_SPECIFIED),
	};



	public EsdMixer()
	{
		super(new TMixerInfo(
			"Esd Mixer",
			GlobalInfo.getVendor(),
			"Mixer for the Enlightened Sound Daemon (esd) running on the local machine",
			GlobalInfo.getVersion()),
		      new Line.Info(Mixer.class),
		      Arrays.asList(FORMATS),
		      Arrays.asList(FORMATS),
		      Arrays.asList(SOURCE_LINE_INFOS),
		      Arrays.asList(TARGET_LINE_INFOS));
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.<init>: begin");
		}
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.<init>: end");
		}
	}


	//////////////// Line //////////////////////////////////////


	// TODO: allow real close and reopen of mixer
	public void open()
	{
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.open(): begin");
		}

		// currently does nothing

		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.open(): end");
		}
	}



	public void close()
	{
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.close(): begin");
		}

		// currently does nothing

		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.close(): end");
		}
	}




	//////////////// Mixer //////////////////////////////////////


	public int getMaxLines(Line.Info info)
	{
		if (TDebug.TraceMixer) { TDebug.out("EsdMixer.getMaxLines(): begin"); }

		int	nMaxLines = 0;
		if (info instanceof DataLine.Info)
		{
			Class	lineClass = info.getLineClass();
			if (lineClass == SourceDataLine.class)
			{
				nMaxLines = 32;
			}
			else if (lineClass == TargetDataLine.class)
			{
				nMaxLines = 1;
			}
			else
			{
				/* DO NOTHING; only source and target lines are supported. */
			}
		}
		else
		{
			/* DO NOTHING; only data lines are supported. */
		}

		if (TDebug.TraceMixer) { TDebug.out("EsdMixer.getMaxLines(): end"); }
		return nMaxLines;
	}



	//////////////// private //////////////////////////////////////


	// nBufferSize is in bytes!
	protected SourceDataLine getSourceDataLine(AudioFormat format, int nBufferSize)
		throws	LineUnavailableException
	{
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getSourceDataLine(): begin");
		}
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getSourceDataLine(): format: " + format);
			TDebug.out("EsdMixer.getSourceDataLine(): buffer size: " + nBufferSize);
		}
		if (nBufferSize < 1)
		{
			nBufferSize = DEFAULT_BUFFER_SIZE;
		}
		// int			nBufferSizeInBytes = nBufferSize * format.getFrameSize();
		EsdSourceDataLine	sourceDataLine = new EsdSourceDataLine(this, format, nBufferSize);
		sourceDataLine.start();
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getSourceDataLine(): returning: " + sourceDataLine);
		}
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getSourceDataLine(): end");
		}
		return sourceDataLine;
	}



	// nBufferSize is in bytes!
	protected TargetDataLine getTargetDataLine(AudioFormat format, int nBufferSize)
		throws	LineUnavailableException
	{
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getTargetDataLine(): begin");
		}
		int			nBufferSizeInBytes = nBufferSize * format.getFrameSize();
		EsdTargetDataLine	targetDataLine = new EsdTargetDataLine(this, format, nBufferSizeInBytes);
		// registerChannel(sourceDataLine);
		targetDataLine.start();
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getTargetDataLine(): returning: " + targetDataLine);
		}
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getTargetDataLine(): end");
		}
		return targetDataLine;
	}



	protected Clip getClip(AudioFormat format)
		throws	LineUnavailableException
	{
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getClip(): begin");
		}
		Clip	clip = new TSoftClip(this, format);
		if (TDebug.TraceMixer)
		{
			TDebug.out("EsdMixer.getClip(): end");
		}
		return clip;
	}




	// -------------------------------------------------------------



}



/*** EsdMixer.java ***/