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-rw-r--r--songdbj/org/tritonus/file/AuAudioOutputStream.java121
1 files changed, 121 insertions, 0 deletions
diff --git a/songdbj/org/tritonus/file/AuAudioOutputStream.java b/songdbj/org/tritonus/file/AuAudioOutputStream.java
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1/*
2 * AuAudioOutputStream.java
3 *
4 * This file is part of Tritonus: http://www.tritonus.org/
5 */
6
7/*
8 * Copyright (c) 2000,2001 by Florian Bomers <http://www.bomers.de>
9 * Copyright (c) 1999 by Matthias Pfisterer
10 *
11 *
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as published
14 * by the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
16 *
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
21 *
22 * You should have received a copy of the GNU Library General Public
23 * License along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 *
26 */
27
28/*
29|<--- this code is formatted to fit into 80 columns --->|
30*/
31
32package org.tritonus.sampled.file;
33
34import java.io.IOException;
35import javax.sound.sampled.AudioFormat;
36import javax.sound.sampled.AudioFileFormat;
37import javax.sound.sampled.AudioSystem;
38import org.tritonus.share.TDebug;
39import org.tritonus.share.sampled.file.TAudioOutputStream;
40import org.tritonus.share.sampled.file.TDataOutputStream;
41
42
43
44/**
45 * AudioOutputStream for AU files.
46 *
47 * @author Florian Bomers
48 * @author Matthias Pfisterer
49 */
50
51public class AuAudioOutputStream extends TAudioOutputStream {
52
53 private static String description="Created by Tritonus";
54
55 /**
56 * Writes a null-terminated ascii string s to f.
57 * The total number of bytes written is aligned on a 2byte boundary.
58 * @exception IOException Write error.
59 */
60 protected static void writeText(TDataOutputStream dos, String s) throws IOException {
61 if (s.length()>0) {
62 dos.writeBytes(s);
63 dos.writeByte(0); // pour terminer le texte
64 if ((s.length() % 2)==0) {
65 // ajout d'un zero pour faire la longeur pair
66 dos.writeByte(0);
67 }
68 }
69 }
70
71 /**
72 * Returns number of bytes that have to written for string s (with alignment)
73 */
74 protected static int getTextLength(String s) {
75 if (s.length()==0) {
76 return 0;
77 } else {
78 return (s.length()+2) & 0xFFFFFFFE;
79 }
80 }
81
82 public AuAudioOutputStream(AudioFormat audioFormat,
83 long lLength,
84 TDataOutputStream dataOutputStream) {
85 // if length exceeds 2GB, set the length field to NOT_SPECIFIED
86 super(audioFormat,
87 lLength>0x7FFFFFFFl?AudioSystem.NOT_SPECIFIED:lLength,
88 dataOutputStream,
89 lLength == AudioSystem.NOT_SPECIFIED && dataOutputStream.supportsSeek());
90 }
91
92 protected void writeHeader() throws IOException {
93 if (TDebug.TraceAudioOutputStream) {
94 TDebug.out("AuAudioOutputStream.writeHeader(): called.");
95 }
96 AudioFormat format = getFormat();
97 long lLength = getLength();
98 TDataOutputStream dos = getDataOutputStream();
99 if (TDebug.TraceAudioOutputStream) {
100 TDebug.out("AuAudioOutputStream.writeHeader(): AudioFormat: " + format);
101 TDebug.out("AuAudioOutputStream.writeHeader(): length: " + lLength);
102 }
103
104 dos.writeInt(AuTool.AU_HEADER_MAGIC);
105 dos.writeInt(AuTool.DATA_OFFSET+getTextLength(description));
106 dos.writeInt((lLength!=AudioSystem.NOT_SPECIFIED)?((int) lLength):AuTool.AUDIO_UNKNOWN_SIZE);
107 dos.writeInt(AuTool.getFormatCode(format));
108 dos.writeInt((int) format.getSampleRate());
109 dos.writeInt(format.getChannels());
110 writeText(dos, description);
111 }
112
113 protected void patchHeader() throws IOException {
114 TDataOutputStream tdos = getDataOutputStream();
115 tdos.seek(0);
116 setLengthFromCalculatedLength();
117 writeHeader();
118 }
119}
120
121/*** AuAudioOutputStream.java ***/