/**
* @author : Paul Taylor
* @author : Eric Farng
*
* Version @version:$Id: Lyrics3v1.java 836 2009-11-12 15:44:07Z paultaylor $
*
* MusicTag Copyright (C)2003,2004
*
* This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser
* General Public License as published by the Free Software Foundation; either version 2.1 of the License,
* or (at your option) any later version.
*
* This library 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License along with this library; if not,
* you can get a copy from http://www.opensource.org/licenses/lgpl-license.php or write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Description:
*/
package org.jaudiotagger.tag.lyrics3;
import org.jaudiotagger.tag.TagException;
import org.jaudiotagger.tag.TagNotFoundException;
import org.jaudiotagger.tag.id3.AbstractTag;
import org.jaudiotagger.tag.id3.ID3Tags;
import org.jaudiotagger.tag.id3.ID3v1Tag;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.nio.ByteBuffer;
import java.util.Iterator;
public class Lyrics3v1 extends AbstractLyrics3
{
/**
*
*/
private String lyric = "";
/**
* Creates a new Lyrics3v1 datatype.
*/
public Lyrics3v1()
{
}
public Lyrics3v1(Lyrics3v1 copyObject)
{
super(copyObject);
this.lyric = copyObject.lyric;
}
public Lyrics3v1(AbstractTag mp3Tag)
{
if (mp3Tag != null)
{
Lyrics3v2 lyricTag;
if (mp3Tag instanceof Lyrics3v1)
{
throw new UnsupportedOperationException("Copy Constructor not called. Please type cast the argument");
}
else if (mp3Tag instanceof Lyrics3v2)
{
lyricTag = (Lyrics3v2) mp3Tag;
}
else
{
lyricTag = new Lyrics3v2(mp3Tag);
}
FieldFrameBodyLYR lyricField;
lyricField = (FieldFrameBodyLYR) lyricTag.getField("LYR").getBody();
this.lyric = lyricField.getLyric();
}
}
/**
* Creates a new Lyrics3v1 datatype.
*
* @param file
* @throws TagNotFoundException
* @throws java.io.IOException
* @param byteBuffer
*/
public Lyrics3v1(ByteBuffer byteBuffer) throws TagNotFoundException, java.io.IOException
{
try
{
this.read(byteBuffer);
}
catch (TagException e)
{
e.printStackTrace();
}
}
/**
* @return
*/
public String getIdentifier()
{
return "Lyrics3v1.00";
}
/**
* @param lyric
*/
public void setLyric(String lyric)
{
this.lyric = ID3Tags.truncate(lyric, 5100);
}
/**
* @return
*/
public String getLyric()
{
return lyric;
}
/**
* @return
*/
public int getSize()
{
return "LYRICSBEGIN".length() + lyric.length() + "LYRICSEND".length();
}
/**
* @param obj
* @return
*/
public boolean isSubsetOf(Object obj)
{
return (obj instanceof Lyrics3v1) && (((Lyrics3v1) obj).lyric.contains(this.lyric));
}
/**
* @param obj
* @return
*/
public boolean equals(Object obj)
{
if (!(obj instanceof Lyrics3v1))
{
return false;
}
Lyrics3v1 object = (Lyrics3v1) obj;
return this.lyric.equals(object.lyric) && super.equals(obj);
}
/**
* @return
* @throws java.lang.UnsupportedOperationException
*
*/
public Iterator iterator()
{
/**
* @todo Implement this org.jaudiotagger.tag.AbstractMP3Tag abstract method
*/
throw new java.lang.UnsupportedOperationException("Method iterator() not yet implemented.");
}
/**
* TODO implement
*
* @param byteBuffer
* @return
* @throws IOException
*/
public boolean seek(ByteBuffer byteBuffer)
{
return false;
}
/**
* @param byteBuffer
* @throws TagNotFoundException
* @throws IOException
*/
public void read(ByteBuffer byteBuffer) throws TagException
{
byte[] buffer = new byte[5100 + 9 + 11];
String lyricBuffer;
if (!seek(byteBuffer))
{
throw new TagNotFoundException("ID3v1 tag not found");
}
byteBuffer.get(buffer);
lyricBuffer = new String(buffer);
lyric = lyricBuffer.substring(0, lyricBuffer.indexOf("LYRICSEND"));
}
/**
* @param file
* @return
* @throws IOException
*/
public boolean seek(RandomAccessFile file) throws IOException
{
byte[] buffer = new byte[5100 + 9 + 11];
String lyricsEnd;
String lyricsStart;
long offset;
// check right before the ID3 1.0 tag for the lyrics tag
file.seek(file.length() - 128 - 9);
file.read(buffer, 0, 9);
lyricsEnd = new String(buffer, 0, 9);
if (lyricsEnd.equals("LYRICSEND"))
{
offset = file.getFilePointer();
}
else
{
// check the end of the file for a lyrics tag incase an ID3
// tag wasn't placed after it.
file.seek(file.length() - 9);
file.read(buffer, 0, 9);
lyricsEnd = new String(buffer, 0, 9);
if (lyricsEnd.equals("LYRICSEND"))
{
offset = file.getFilePointer();
}
else
{
return false;
}
}
// the tag can at most only be 5100 bytes
offset -= (5100 + 9 + 11);
file.seek(offset);
file.read(buffer);
lyricsStart = new String(buffer);
// search for the tag
int i = lyricsStart.indexOf("LYRICSBEGIN");
if (i == -1)
{
return false;
}
file.seek(offset + i + 11);
return true;
}
/**
* @return
*/
public String toString()
{
String str = getIdentifier() + " " + this.getSize() + "\n";
return str + lyric;
}
/**
* @param file
* @throws IOException
*/
public void write(RandomAccessFile file) throws IOException
{
String str;
int offset;
byte[] buffer;
ID3v1Tag id3v1tag;
id3v1tag = null;
delete(file);
file.seek(file.length());
buffer = new byte[lyric.length() + 11 + 9];
str = "LYRICSBEGIN";
for (int i = 0; i < str.length(); i++)
{
buffer[i] = (byte) str.charAt(i);
}
offset = str.length();
str = ID3Tags.truncate(lyric, 5100);
for (int i = 0; i < str.length(); i++)
{
buffer[i + offset] = (byte) str.charAt(i);
}
offset += str.length();
str = "LYRICSEND";
for (int i = 0; i < str.length(); i++)
{
buffer[i + offset] = (byte) str.charAt(i);
}
offset += str.length();
file.write(buffer, 0, offset);
if (id3v1tag != null)
{
id3v1tag.write(file);
}
}
} |
