/*
* 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
*/
package org.jaudiotagger.tag.id3.framebody;
import org.jaudiotagger.logging.ErrorMessage;
import org.jaudiotagger.tag.InvalidTagException;
import org.jaudiotagger.tag.datatype.*;
import org.jaudiotagger.tag.id3.ID3TextEncodingConversion;
import org.jaudiotagger.tag.id3.ID3v24Frames;
import org.jaudiotagger.tag.id3.valuepair.TextEncoding;
import org.jaudiotagger.tag.reference.Languages;
import java.io.ByteArrayOutputStream;
import java.nio.ByteBuffer;
/**
* Comments frame.
* <p/>
* <p/>
* This frame is intended for any kind of full text information that does not fit in any other frame. It consists of a
* frame header followed by encoding, language and content descriptors and is ended with the actual comment as a
* text string. Newline characters are allowed in the comment text string. There may be more than one comment frame
* in each tag, but only one with the same language and* content descriptor.
*
* </p><p><table border=0 width="70%">
* <tr><td colspan=2><Header for 'Comment', ID: "COMM"></td></tr>
* <tr><td>Text encoding </td><td width="80%">$xx </td></tr>
* <tr><td>Language </td><td>$xx xx xx </td></tr>
* <tr><td>Short content descrip.</td><td><text string according to encoding> $00 (00)</td></tr>
* <tr><td>The actual text </td><td><full text string according to encoding></td></tr>
* </table></p>
* <p/>
* <p>For more details, please refer to the ID3 specifications:
* <ul>
* <li><a href="http://www.id3.org/id3v2.3.0.txt">ID3 v2.3.0 Spec</a>
* </ul>
*
* @author : Paul Taylor
* @author : Eric Farng
* @version $Id: FrameBodyCOMM.java 926 2010-10-21 15:49:06Z paultaylor $
*/
public class FrameBodyCOMM extends AbstractID3v2FrameBody implements ID3v24FrameBody, ID3v23FrameBody
{
//Most players only read comment with description of blank
public static final String DEFAULT = "";
//used by iTunes for volume normalization, although uses the COMMENT field not usually displayed as a comment
public static final String ITUNES_NORMALIZATION = "iTunNORM";
//Various descriptions used by MediaMonkey, (note Media Monkey uses non-standard language field XXX)
private static final String MM_PREFIX = "Songs-DB";
public static final String MM_CUSTOM1 = "Songs-DB_Custom1";
public static final String MM_CUSTOM2 = "Songs-DB_Custom2";
public static final String MM_CUSTOM3 = "Songs-DB_Custom3";
public static final String MM_CUSTOM4 = "Songs-DB_Custom4";
public static final String MM_CUSTOM5 = "Songs-DB_Custom5";
public static final String MM_OCCASION = "Songs-DB_Occasion";
public static final String MM_QUALITY = "Songs-DB_Preference";
public static final String MM_TEMPO = "Songs-DB_Tempo";
public boolean isMediaMonkeyFrame()
{
String desc = getDescription();
if(desc!=null && !(desc.length()==0))
{
if(desc.startsWith(MM_PREFIX))
{
return true;
}
}
return false;
}
public boolean isItunesFrame()
{
String desc = getDescription();
if(desc!=null && !(desc.length()==0))
{
if(desc.equals(ITUNES_NORMALIZATION))
{
return true;
}
}
return false;
}
/**
* Creates a new FrameBodyCOMM datatype.
*/
public FrameBodyCOMM()
{
setObjectValue(DataTypes.OBJ_TEXT_ENCODING, TextEncoding.ISO_8859_1);
setObjectValue(DataTypes.OBJ_LANGUAGE, Languages.DEFAULT_ID);
setObjectValue(DataTypes.OBJ_DESCRIPTION, "");
setObjectValue(DataTypes.OBJ_TEXT, "");
}
public FrameBodyCOMM(FrameBodyCOMM body)
{
super(body);
}
/**
* Creates a new FrameBodyCOMM datatype.
*
* @param textEncoding
* @param language
* @param description
* @param text
*/
public FrameBodyCOMM(byte textEncoding, String language, String description, String text)
{
setObjectValue(DataTypes.OBJ_TEXT_ENCODING, textEncoding);
setObjectValue(DataTypes.OBJ_LANGUAGE, language);
setObjectValue(DataTypes.OBJ_DESCRIPTION, description);
setObjectValue(DataTypes.OBJ_TEXT, text);
}
/**
* Construct a Comment frame body from the buffer
*
* @param byteBuffer
* @param frameSize
* @throws InvalidTagException if unable to create framebody from buffer
*/
public FrameBodyCOMM(ByteBuffer byteBuffer, int frameSize) throws InvalidTagException
{
super(byteBuffer, frameSize);
}
/**
* Set the description field, which describes the type of comment
*
* @param description
*/
public void setDescription(String description)
{
if (description == null)
{
throw new IllegalArgumentException(ErrorMessage.GENERAL_INVALID_NULL_ARGUMENT.getMsg());
}
setObjectValue(DataTypes.OBJ_DESCRIPTION, description);
}
/**
* Get the description field, which describes the type of comment
*
* @return description field
*/
public String getDescription()
{
return (String) getObjectValue(DataTypes.OBJ_DESCRIPTION);
}
/**
* The ID3v2 frame identifier
*
* @return the ID3v2 frame identifier for this frame type
*/
public String getIdentifier()
{
return ID3v24Frames.FRAME_ID_COMMENT;
}
/**
* Sets the language the comment is written in
*
* @param language
*/
public void setLanguage(String language)
{
//TODO not sure if this might break existing code
/*if(language==null)
{
throw new IllegalArgumentException(ErrorMessage.GENERAL_INVALID_NULL_ARGUMENT.getMsg());
} */
setObjectValue(DataTypes.OBJ_LANGUAGE, language);
}
/**
* Get the language the comment is written in
*
* @return the language
*/
public String getLanguage()
{
return (String) getObjectValue(DataTypes.OBJ_LANGUAGE);
}
/**
* @param text
*/
public void setText(String text)
{
if (text == null)
{
throw new IllegalArgumentException(ErrorMessage.GENERAL_INVALID_NULL_ARGUMENT.getMsg());
}
setObjectValue(DataTypes.OBJ_TEXT, text);
}
/**
* Returns the the text field which holds the comment, adjusted to ensure does not return trailing null
* which is due to a iTunes bug.
*
* @return the text field
*/
public String getText()
{
TextEncodedStringSizeTerminated text = (TextEncodedStringSizeTerminated) getObject(DataTypes.OBJ_TEXT);
return text.getValueAtIndex(0);
}
public String getUserFriendlyValue()
{
return getText();
}
/**
*
*/
protected void setupObjectList()
{
objectList.add(new NumberHashMap(DataTypes.OBJ_TEXT_ENCODING, this, TextEncoding.TEXT_ENCODING_FIELD_SIZE));
objectList.add(new StringHashMap(DataTypes.OBJ_LANGUAGE, this, Languages.LANGUAGE_FIELD_SIZE));
objectList.add(new TextEncodedStringNullTerminated(DataTypes.OBJ_DESCRIPTION, this));
objectList.add(new TextEncodedStringSizeTerminated(DataTypes.OBJ_TEXT, this));
}
/**
* Because COMM have a text encoding we need to check the text String does
* not contain characters that cannot be encoded in current encoding before
* we write data. If there are we change the encoding.
*/
public void write(ByteArrayOutputStream tagBuffer)
{
//Ensure valid for type
setTextEncoding(ID3TextEncodingConversion.getTextEncoding(getHeader(), getTextEncoding()));
//Ensure valid for data
if (!((AbstractString) getObject(DataTypes.OBJ_TEXT)).canBeEncoded())
{
this.setTextEncoding(ID3TextEncodingConversion.getUnicodeTextEncoding(getHeader()));
}
if (!((AbstractString) getObject(DataTypes.OBJ_DESCRIPTION)).canBeEncoded())
{
this.setTextEncoding(ID3TextEncodingConversion.getUnicodeTextEncoding(getHeader()));
}
super.write(tagBuffer);
}
}
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