aiffaudiofilewriter.java

来自「kaffe Java 解释器语言,源码,Java的子集系统,开放源代码」· Java 代码 · 共 102 行

/*
 *	AiffAudioFileWriter.java
 */

/*
 *  Copyright (c) 2000 by Florian Bomers <[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.file;


import	java.io.IOException;
import	java.util.Arrays;

import	javax.sound.sampled.AudioFileFormat;
import	javax.sound.sampled.AudioFormat;
import	javax.sound.sampled.AudioInputStream;
import	javax.sound.sampled.AudioSystem;

import	org.tritonus.share.TDebug;
import	org.tritonus.share.sampled.Encodings;
import	org.tritonus.share.sampled.file.AudioOutputStream;
import	org.tritonus.share.sampled.file.TAudioFileWriter;
import	org.tritonus.share.sampled.file.TDataOutputStream;


/**
 * Class for writing AIFF and AIFF-C files.
 *
 * @author Florian Bomers
 */

public class AiffAudioFileWriter extends TAudioFileWriter {

	private static final AudioFileFormat.Type[] FILE_TYPES =
	    {
	        AudioFileFormat.Type.AIFF,
	        AudioFileFormat.Type.AIFC
	    };

	private static final int ALL=AudioSystem.NOT_SPECIFIED;
	private static final AudioFormat.Encoding	PCM_SIGNED = AudioFormat.Encoding.PCM_SIGNED;
	private static final AudioFormat.Encoding	ULAW = AudioFormat.Encoding.ULAW;
	private static final AudioFormat.Encoding	IMA_ADPCM = Encodings.getEncoding("IMA_ADPCM");

	// IMPORTANT: this array depends on the AudioFormat.match() algorithm which takes
	//            AudioSystem.NOT_SPECIFIED into account !
	private static final AudioFormat[]	AUDIO_FORMATS =
	    {
	        new AudioFormat(PCM_SIGNED, ALL, 8, ALL, ALL, ALL, true),
	        new AudioFormat(PCM_SIGNED, ALL, 8, ALL, ALL, ALL, false),
	        new AudioFormat(ULAW, ALL, 8, ALL, ALL, ALL, false),
	        new AudioFormat(ULAW, ALL, 8, ALL, ALL, ALL, true),
	        new AudioFormat(PCM_SIGNED, ALL, 16, ALL, ALL, ALL, true),
	        new AudioFormat(PCM_SIGNED, ALL, 24, ALL, ALL, ALL, true),
	        new AudioFormat(PCM_SIGNED, ALL, 32, ALL, ALL, ALL, true),
	        new AudioFormat(IMA_ADPCM, ALL, 4, ALL, ALL, ALL, true),
	        new AudioFormat(IMA_ADPCM, ALL, 4, ALL, ALL, ALL, false),
	    };

	public AiffAudioFileWriter() {
		super(Arrays.asList(FILE_TYPES),
		      Arrays.asList(AUDIO_FORMATS));
	}


	protected boolean isAudioFormatSupportedImpl(AudioFormat format,
	        AudioFileFormat.Type fileType) {
		return AiffTool.getFormatCode(format)!=AiffTool.AIFF_COMM_UNSPECIFIED;
	}


	protected AudioOutputStream getAudioOutputStream(AudioFormat audioFormat,
	        long lLengthInBytes,
	        AudioFileFormat.Type fileType,
	        TDataOutputStream dataOutputStream)	throws	IOException {
	            return new AiffAudioOutputStream(audioFormat, fileType,
	                                             lLengthInBytes,
	                                             dataOutputStream);
	        }

}

/*** AiffAudioFileWriter.java ***/