/*
* USLTID3V2Frame.java
*
* Created on 8-Jan-2004
*
* Copyright (C)2004-2005 Paul Grebenc
*
* 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: USLTID3V2Frame.java,v 1.10 2005/02/06 18:11:17 paul Exp $
*/
package org.blinkenlights.jid3.v2;
import java.io.*;
import org.blinkenlights.jid3.*;
import org.blinkenlights.jid3.io.*;
import org.blinkenlights.jid3.util.*;
/** Frame containing unsynchronized lyrics/text transcription.
*
* @author paul
*/
public class USLTID3V2Frame extends ID3V2Frame
{
private TextEncoding m_oTextEncoding;
private String m_sLanguage = null;
private String m_sContentDescriptor = null;
private String m_sLyrics = null;
public USLTID3V2Frame(String sLanguage, String sContentDescriptor, String sLyrics)
throws ID3Exception
{
m_oTextEncoding = TextEncoding.getDefaultTextEncoding();
if (sLanguage.length() != 3)
{
throw new ID3Exception("Language string length must be 3.");
}
m_sLanguage = sLanguage;
m_sContentDescriptor = sContentDescriptor;
m_sLyrics = sLyrics;
if (m_sLyrics == null)
{
m_sLyrics = "";
}
}
public USLTID3V2Frame(InputStream oIS)
throws ID3Exception
{
// Parse out the text encoding and text string from the raw data
try
{
ID3DataInputStream oFrameDataID3DIS = new ID3DataInputStream(oIS);
// text encoding
m_oTextEncoding = TextEncoding.getTextEncoding(oFrameDataID3DIS.readUnsignedByte());
// language
byte[] abyLanguage = new byte[3];
oFrameDataID3DIS.readFully(abyLanguage);
m_sLanguage = new String(abyLanguage);
// content descriptor (read to null)
m_sContentDescriptor = oFrameDataID3DIS.readStringToNull(m_oTextEncoding);
// lyrics
byte[] abyLyrics = new byte[oFrameDataID3DIS.available()];
oFrameDataID3DIS.readFully(abyLyrics);
m_sLyrics = new String(abyLyrics, m_oTextEncoding.getEncodingString());
}
catch (Exception e)
{
throw new InvalidFrameID3Exception(e);
}
}
public void accept(ID3Visitor oID3Visitor)
{
oID3Visitor.visitUSLTID3V2Frame(this);
}
/** Set the text encoding to be used for the content descriptor and lyrics in this frame.
*
* @param oTextEncoding the text encoding to be used for this frame
*/
public void setTextEncoding(TextEncoding oTextEncoding)
{
if (oTextEncoding == null)
{
throw new NullPointerException("Text encoding cannot be null.");
}
m_oTextEncoding = oTextEncoding;
}
/** Get the text encoding used for the content descriptor and lyrics in this frame.
*
* @return the text encoding to be used for this frame
*/
public TextEncoding getTextEncoding()
{
return m_oTextEncoding;
}
/** Set the language used in this frame.
*
* @param sLanguage a three letter language code
* @throws ID3Exception if the language is null or not three characters in length or if this frame is in a tag which
* contains another USLT frame with the same language and content descriptor
*/
public void setLanguage(String sLanguage)
throws ID3Exception
{
String sOrigLanguage = m_sLanguage;
if ((sLanguage == null) || (sLanguage.length() != 3))
{
throw new ID3Exception("A three character length language code is required in USLT frame.");
}
m_sLanguage = sLanguage;
// try this update, and reverse it if it generates and error
try
{
notifyID3Observers();
}
catch (ID3Exception e)
{
m_sLanguage = sOrigLanguage;
throw e;
}
}
/** Get the language used in this frame.
*
* @return a three letter language code
*/
public String getLanguage()
{
return m_sLanguage;
}
/** Set the content descriptor for this frame.
*
* @param sContentDescriptor the content descriptor for this frame
* @throws ID3Exception if the content descriptor is null, or if this frame is in a tag which contains another
* USLT frame with the same language and content descriptor
*/
public void setContentDescriptor(String sContentDescriptor)
throws ID3Exception
{
String sOrigContentDescriptor = m_sContentDescriptor;
if (sContentDescriptor == null)
{
throw new ID3Exception("Content descriptor is required for USLT frame.");
}
m_sContentDescriptor = sContentDescriptor;
// try this update, and reverse it if it generates and error
try
{
notifyID3Observers();
}
catch (ID3Exception e)
{
m_sContentDescriptor = sOrigContentDescriptor;
throw e;
}
}
/** Get the content descriptor for this frame.
*
* @return the content descriptor
*/
public String getContentDescriptor()
{
return m_sContentDescriptor;
}
/** Set the lyrics for this frame.
*
* @param sLyrics the lyrics for this frame
*/
public void setLyrics(String sLyrics)
{
if (sLyrics == null)
{
m_sLyrics = "";
}
m_sLyrics = sLyrics;
}
/** Get the lyrics for this frame.
*
* @return the lyrics
*/
public String getLyrics()
{
return m_sLyrics;
}
protected byte[] getFrameId()
{
return "USLT".getBytes();
}
public String toString()
{
return "Unsychronized lyrics: Language=[" + m_sLanguage + "], Content descriptor=[" +
m_sContentDescriptor + "], Lyrics=[" + m_sLyrics + "]";
}
protected void writeBody(ID3DataOutputStream oIDOS)
throws IOException
{
// text encoding
oIDOS.writeUnsignedByte(m_oTextEncoding.getEncodingValue());
// language
oIDOS.write(m_sLanguage.getBytes());
// content descriptor
if (m_sContentDescriptor != null)
{
oIDOS.write(m_sContentDescriptor.getBytes(m_oTextEncoding.getEncodingString()));
}
// null separating content descriptor from lyrics
if (m_oTextEncoding.equals(TextEncoding.ISO_8859_1))
{
oIDOS.writeUnsignedByte(0);
}
else
{
oIDOS.writeUnsignedByte(0);
oIDOS.writeUnsignedByte(0);
}
// lyrics
oIDOS.write(m_sLyrics.getBytes(m_oTextEncoding.getEncodingString()));
}
public boolean equals(Object oOther)
{
if ((oOther == null) || (!(oOther instanceof USLTID3V2Frame)))
{
return false;
}
USLTID3V2Frame oOtherUSLT = (USLTID3V2Frame)oOther;
return (m_oTextEncoding.equals(oOtherUSLT.m_oTextEncoding) &&
m_sLanguage.equals(oOtherUSLT.m_sLanguage) &&
m_sContentDescriptor.equals(oOtherUSLT.m_sContentDescriptor) &&
m_sLyrics.equals(oOtherUSLT.m_sLyrics));
}
}
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