9fee0ec4ca
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7101 a1c6a512-1295-4272-9138-f99709370657
121 lines
3.7 KiB
Java
121 lines
3.7 KiB
Java
/*
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* AuAudioOutputStream.java
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*
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* This file is part of Tritonus: http://www.tritonus.org/
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*/
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/*
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* Copyright (c) 2000,2001 by Florian Bomers <http://www.bomers.de>
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* Copyright (c) 1999 by Matthias Pfisterer
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as published
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* by the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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/*
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|<--- this code is formatted to fit into 80 columns --->|
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*/
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package org.tritonus.sampled.file;
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import java.io.IOException;
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import javax.sound.sampled.AudioFormat;
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import javax.sound.sampled.AudioFileFormat;
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import javax.sound.sampled.AudioSystem;
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import org.tritonus.share.TDebug;
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import org.tritonus.share.sampled.file.TAudioOutputStream;
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import org.tritonus.share.sampled.file.TDataOutputStream;
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/**
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* AudioOutputStream for AU files.
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*
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* @author Florian Bomers
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* @author Matthias Pfisterer
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*/
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public class AuAudioOutputStream extends TAudioOutputStream {
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private static String description="Created by Tritonus";
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/**
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* Writes a null-terminated ascii string s to f.
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* The total number of bytes written is aligned on a 2byte boundary.
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* @exception IOException Write error.
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*/
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protected static void writeText(TDataOutputStream dos, String s) throws IOException {
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if (s.length()>0) {
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dos.writeBytes(s);
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dos.writeByte(0); // pour terminer le texte
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if ((s.length() % 2)==0) {
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// ajout d'un zero pour faire la longeur pair
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dos.writeByte(0);
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}
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}
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}
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/**
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* Returns number of bytes that have to written for string s (with alignment)
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*/
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protected static int getTextLength(String s) {
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if (s.length()==0) {
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return 0;
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} else {
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return (s.length()+2) & 0xFFFFFFFE;
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}
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}
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public AuAudioOutputStream(AudioFormat audioFormat,
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long lLength,
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TDataOutputStream dataOutputStream) {
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// if length exceeds 2GB, set the length field to NOT_SPECIFIED
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super(audioFormat,
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lLength>0x7FFFFFFFl?AudioSystem.NOT_SPECIFIED:lLength,
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dataOutputStream,
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lLength == AudioSystem.NOT_SPECIFIED && dataOutputStream.supportsSeek());
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}
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protected void writeHeader() throws IOException {
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if (TDebug.TraceAudioOutputStream) {
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TDebug.out("AuAudioOutputStream.writeHeader(): called.");
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}
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AudioFormat format = getFormat();
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long lLength = getLength();
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TDataOutputStream dos = getDataOutputStream();
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if (TDebug.TraceAudioOutputStream) {
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TDebug.out("AuAudioOutputStream.writeHeader(): AudioFormat: " + format);
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TDebug.out("AuAudioOutputStream.writeHeader(): length: " + lLength);
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}
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dos.writeInt(AuTool.AU_HEADER_MAGIC);
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dos.writeInt(AuTool.DATA_OFFSET+getTextLength(description));
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dos.writeInt((lLength!=AudioSystem.NOT_SPECIFIED)?((int) lLength):AuTool.AUDIO_UNKNOWN_SIZE);
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dos.writeInt(AuTool.getFormatCode(format));
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dos.writeInt((int) format.getSampleRate());
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dos.writeInt(format.getChannels());
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writeText(dos, description);
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}
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protected void patchHeader() throws IOException {
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TDataOutputStream tdos = getDataOutputStream();
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tdos.seek(0);
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setLengthFromCalculatedLength();
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writeHeader();
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}
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}
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/*** AuAudioOutputStream.java ***/
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