/*
* 21.04.2004 Original verion. davagin@udm.ru.
*-----------------------------------------------------------------------
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*----------------------------------------------------------------------
*/
package davaguine.jmac.info;
import davaguine.jmac.tools.ByteArrayReader;
import davaguine.jmac.tools.ByteArrayWriter;
import davaguine.jmac.tools.File;
import java.io.EOFException;
import java.io.IOException;
/**
* Author: Dmitry Vaguine
* Date: 04.03.2004
* Time: 14:51:31
*/
public class ID3Tag {
public String Header; // should equal 'TAG'
public String Title; // title
public String Artist; // artist
public String Album; // album
public String Year; // year
public String Comment; // comment
public short Track; // track
public short Genre; // genre
public static String defaultEncoding = "US-ASCII";
public final static int ID3_TAG_BYTES = 128;
public static ID3Tag read(final File file) throws IOException {
long offset = file.length() - ID3_TAG_BYTES;
if (offset < 0)
return null;
file.seek(offset);
try {
final ID3Tag tag = new ID3Tag();
final ByteArrayReader reader = new ByteArrayReader(file, ID3_TAG_BYTES);
tag.Header = reader.readString(3, defaultEncoding);
tag.Title = reader.readString(30, defaultEncoding);
tag.Artist = reader.readString(30, defaultEncoding);
tag.Album = reader.readString(30, defaultEncoding);
tag.Year = reader.readString(4, defaultEncoding);
tag.Comment = reader.readString(29, defaultEncoding);
tag.Track = reader.readUnsignedByte();
tag.Genre = reader.readUnsignedByte();
return tag.Header.equals("TAG") ? tag : null;
} catch (EOFException e) {
return null;
}
}
public final void write(final ByteArrayWriter writer) {
writer.writeString(Header, 3);
writer.writeString(Title, 30);
writer.writeString(Artist, 30);
writer.writeString(Album, 30);
writer.writeString(Year, 4);
writer.writeString(Comment, 29);
writer.writeUnsignedByte(Track);
writer.writeUnsignedByte(Genre);
}
public static void setDefaultEncoding(String encoding) {
defaultEncoding = encoding;
}
}