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/*
* AuAudioOutputStream.java
*
* This file is part of Tritonus: http://www.tritonus.org/
*/
/*
* Copyright (c) 2000,2001 by Florian Bomers <http://www.bomers.de>
* Copyright (c) 1999 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.sampled.file;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioFileFormat;
import javax.sound.sampled.AudioSystem;
import org.tritonus.share.TDebug;
import org.tritonus.share.sampled.file.TAudioOutputStream;
import org.tritonus.share.sampled.file.TDataOutputStream;
/**
* AudioOutputStream for AU files.
*
* @author Florian Bomers
* @author Matthias Pfisterer
*/
public class AuAudioOutputStream extends TAudioOutputStream {
private static String description="Created by Tritonus";
/**
* Writes a null-terminated ascii string s to f.
* The total number of bytes written is aligned on a 2byte boundary.
* @exception IOException Write error.
*/
protected static void writeText(TDataOutputStream dos, String s) throws IOException {
if (s.length()>0) {
dos.writeBytes(s);
dos.writeByte(0); // pour terminer le texte
if ((s.length() % 2)==0) {
// ajout d'un zero pour faire la longeur pair
dos.writeByte(0);
}
}
}
/**
* Returns number of bytes that have to written for string s (with alignment)
*/
protected static int getTextLength(String s) {
if (s.length()==0) {
return 0;
} else {
return (s.length()+2) & 0xFFFFFFFE;
}
}
public AuAudioOutputStream(AudioFormat audioFormat,
long lLength,
TDataOutputStream dataOutputStream) {
// if length exceeds 2GB, set the length field to NOT_SPECIFIED
super(audioFormat,
lLength>0x7FFFFFFFl?AudioSystem.NOT_SPECIFIED:lLength,
dataOutputStream,
lLength == AudioSystem.NOT_SPECIFIED && dataOutputStream.supportsSeek());
}
protected void writeHeader() throws IOException {
if (TDebug.TraceAudioOutputStream) {
TDebug.out("AuAudioOutputStream.writeHeader(): called.");
}
AudioFormat format = getFormat();
long lLength = getLength();
TDataOutputStream dos = getDataOutputStream();
if (TDebug.TraceAudioOutputStream) {
TDebug.out("AuAudioOutputStream.writeHeader(): AudioFormat: " + format);
TDebug.out("AuAudioOutputStream.writeHeader(): length: " + lLength);
}
dos.writeInt(AuTool.AU_HEADER_MAGIC);
dos.writeInt(AuTool.DATA_OFFSET+getTextLength(description));
dos.writeInt((lLength!=AudioSystem.NOT_SPECIFIED)?((int) lLength):AuTool.AUDIO_UNKNOWN_SIZE);
dos.writeInt(AuTool.getFormatCode(format));
dos.writeInt((int) format.getSampleRate());
dos.writeInt(format.getChannels());
writeText(dos, description);
}
protected void patchHeader() throws IOException {
TDataOutputStream tdos = getDataOutputStream();
tdos.seek(0);
setLengthFromCalculatedLength();
writeHeader();
}
}
/*** AuAudioOutputStream.java ***/
|
