/*
* 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;
import org.jaudiotagger.audio.generic.Utils;
import org.jaudiotagger.audio.mp3.MP3File;
import org.jaudiotagger.tag.*;
import org.jaudiotagger.tag.id3.framebody.AbstractID3v2FrameBody;
import org.jaudiotagger.tag.id3.framebody.FrameBodyDeprecated;
import org.jaudiotagger.tag.id3.framebody.FrameBodyUnsupported;
import org.jaudiotagger.tag.id3.valuepair.TextEncoding;
import org.jaudiotagger.utils.EqualsUtil;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.math.BigInteger;
import java.nio.ByteBuffer;
import java.util.logging.Level;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Represents an ID3v2.2 frame.
*
* @author : Paul Taylor
* @author : Eric Farng
* @version $Id: ID3v22Frame.java 976 2011-06-08 10:05:34Z paultaylor $
*/
public class ID3v22Frame extends AbstractID3v2Frame
{
private static Pattern validFrameIdentifier = Pattern.compile("[A-Z][0-9A-Z]{2}");
protected static final int FRAME_ID_SIZE = 3;
protected static final int FRAME_SIZE_SIZE = 3;
protected static final int FRAME_HEADER_SIZE = FRAME_ID_SIZE + FRAME_SIZE_SIZE;
public ID3v22Frame()
{
}
protected int getFrameIdSize()
{
return FRAME_ID_SIZE;
}
protected int getFrameSizeSize()
{
return FRAME_SIZE_SIZE;
}
protected int getFrameHeaderSize()
{
return FRAME_HEADER_SIZE;
}
/**
* Creates a new ID3v22 Frame with given body
*
* @param body New body and frame is based on this
*/
public ID3v22Frame(AbstractID3v2FrameBody body)
{
super(body);
}
/**
* Compare for equality
* To be deemed equal obj must be a IDv23Frame with the same identifier
* and the same flags.
* containing the same body,datatype list ectera.
* equals() method is made up from all the various components
*
* @param obj
* @return if true if this object is equivalent to obj
*/
public boolean equals(Object obj)
{
if ( this == obj ) return true;
if (!(obj instanceof ID3v22Frame))
{
return false;
}
ID3v22Frame that = (ID3v22Frame) obj;
return
EqualsUtil.areEqual(this.statusFlags, that.statusFlags) &&
EqualsUtil.areEqual(this.encodingFlags, that.encodingFlags) &&
super.equals(that);
}
/**
* Creates a new ID3v22 Frame of type identifier.
* <p/>
* An empty body of the correct type will be automatically created. This constructor should be used when wish to
* create a new frame from scratch using user values
* @param identifier
*/
@SuppressWarnings("unchecked")
public ID3v22Frame(String identifier)
{
logger.config("Creating empty frame of type" + identifier);
String bodyIdentifier = identifier;
this.identifier = identifier;
//If dealing with v22 identifier (Note this constructor is used by all three tag versions)
if (ID3Tags.isID3v22FrameIdentifier(bodyIdentifier))
{
//Does it have its own framebody (PIC,CRM) or are we using v23/v24 body (the normal case)
if (ID3Tags.forceFrameID22To23(bodyIdentifier) != null)
{
//Do not convert
}
else if(bodyIdentifier.equals("CRM"))
{
//Do not convert.
//TODO we don't have a way of converting this to v23 which is why its not in the ForceMap
}
//TODO Improve messy fix for datetime
//TODO need to check in case v22 body does exist before using V23 body(e.g PIC)
else if ((bodyIdentifier.equals(ID3v22Frames.FRAME_ID_V2_TYER)) || (bodyIdentifier.equals(ID3v22Frames.FRAME_ID_V2_TIME)))
{
bodyIdentifier = ID3v24Frames.FRAME_ID_YEAR;
}
// Have to check for v22 because most don't have own body they use v23 or v24
// body to hold the data, the frame is identified by its identifier, the body identifier
// is just to create a body suitable for writing the data to
else if (ID3Tags.isID3v22FrameIdentifier(bodyIdentifier))
{
bodyIdentifier = ID3Tags.convertFrameID22To23(bodyIdentifier);
}
}
// Use reflection to map id to frame body, which makes things much easier
// to keep things up to date.
try
{
Class<AbstractID3v2FrameBody> c = (Class<AbstractID3v2FrameBody>) Class.forName("org.jaudiotagger.tag.id3.framebody.FrameBody" + bodyIdentifier);
frameBody = c.newInstance();
}
catch (ClassNotFoundException cnfe)
{
logger.log(Level.SEVERE, cnfe.getMessage(), cnfe);
frameBody = new FrameBodyUnsupported(identifier);
}
//Instantiate Interface/Abstract should not happen
catch (InstantiationException ie)
{
logger.log(Level.SEVERE, ie.getMessage(), ie);
throw new RuntimeException(ie);
}
//Private Constructor shouild not happen
catch (IllegalAccessException iae)
{
logger.log(Level.SEVERE, iae.getMessage(), iae);
throw new RuntimeException(iae);
}
frameBody.setHeader(this);
logger.config("Created empty frame of type" + this.identifier + "with frame body of" + bodyIdentifier);
}
/**
* Copy Constructor
* <p/>
* Creates a new v22 frame based on another v22 frame
* @param frame
*/
public ID3v22Frame(ID3v22Frame frame)
{
super(frame);
logger.config("Creating frame from a frame of same version");
}
private void createV22FrameFromV23Frame(ID3v23Frame frame) throws InvalidFrameException
{
identifier = ID3Tags.convertFrameID23To22(frame.getIdentifier());
if (identifier != null)
{
logger.config("V2:Orig id is:" + frame.getIdentifier() + ":New id is:" + identifier);
this.frameBody = (AbstractID3v2FrameBody) ID3Tags.copyObject(frame.getBody());
}
// Is it a known v3 frame which needs forcing to v2 frame e.g. APIC - PIC
else if (ID3Tags.isID3v23FrameIdentifier(frame.getIdentifier()))
{
identifier = ID3Tags.forceFrameID23To22(frame.getIdentifier());
if (identifier != null)
{
logger.config("V2:Force:Orig id is:" + frame.getIdentifier() + ":New id is:" + identifier);
this.frameBody = this.readBody(identifier, (AbstractID3v2FrameBody) frame.getBody());
}
// No mechanism exists to convert it to a v22 frame
else
{
throw new InvalidFrameException("Unable to convert v23 frame:" + frame.getIdentifier() + " to a v22 frame");
}
}
//Deprecated frame for v23
else if (frame.getBody() instanceof FrameBodyDeprecated)
{
//Was it valid for this tag version, if so try and reconstruct
if (ID3Tags.isID3v22FrameIdentifier(frame.getIdentifier()))
{
this.frameBody = frame.getBody();
identifier = frame.getIdentifier();
logger.config("DEPRECATED:Orig id is:" + frame.getIdentifier() + ":New id is:" + identifier);
}
//or was it still deprecated, if so leave as is
else
{
this.frameBody = new FrameBodyDeprecated((FrameBodyDeprecated) frame.getBody());
identifier = frame.getIdentifier();
logger.config("DEPRECATED:Orig id is:" + frame.getIdentifier() + ":New id is:" + identifier);
}
}
// Unknown Frame e.g NCON
else
{
this.frameBody = new FrameBodyUnsupported((FrameBodyUnsupported) frame.getBody());
identifier = frame.getIdentifier();
logger.config("v2:UNKNOWN:Orig id is:" + frame.getIdentifier() + ":New id is:" + identifier);
}
}
/**
* Creates a new ID3v22 Frame from another frame of a different tag version
*
* @param frame to construct the new frame from
* @throws org.jaudiotagger.tag.InvalidFrameException
*/
public ID3v22Frame(AbstractID3v2Frame frame) throws InvalidFrameException
{
logger.config("Creating frame from a frame of a different version");
if (frame instanceof ID3v22Frame)
{
throw new UnsupportedOperationException("Copy Constructor not called. Please type cast the argument");
}
// If it is a v24 frame is it possible to convert it into a v23 frame, anmd then convert from that
if (frame instanceof ID3v24Frame)
{
ID3v23Frame v23Frame = new ID3v23Frame(frame);
createV22FrameFromV23Frame(v23Frame);
}
//If it is a v23 frame is it possible to convert it into a v22 frame
else if (frame instanceof ID3v23Frame)
{
createV22FrameFromV23Frame((ID3v23Frame) frame);
}
this.frameBody.setHeader(this);
logger.config("Created frame from a frame of a different version");
}
/**
* Creates a new ID3v22Frame datatype by reading from byteBuffer.
*
* @param byteBuffer to read from
* @param loggingFilename
* @throws org.jaudiotagger.tag.InvalidFrameException
*/
public ID3v22Frame(ByteBuffer byteBuffer, String loggingFilename) throws InvalidFrameException, InvalidDataTypeException
{
setLoggingFilename(loggingFilename);
read(byteBuffer);
}
/**
* Creates a new ID3v23Frame datatype by reading from byteBuffer.
*
* @param byteBuffer to read from
* @deprecated use {@link #ID3v22Frame(ByteBuffer,String)} instead
* @throws org.jaudiotagger.tag.InvalidFrameException
*/
public ID3v22Frame(ByteBuffer byteBuffer) throws InvalidFrameException, InvalidDataTypeException
{
this(byteBuffer, "");
}
/**
* Return size of frame
*
* @return int size of frame
*/
public int getSize()
{
return frameBody.getSize() + getFrameHeaderSize();
}
@Override
protected boolean isPadding(byte[] buffer)
{
if(
(buffer[0]=='\0')&&
(buffer[1]=='\0')&&
(buffer[2]=='\0')
)
{
return true;
}
return false;
}
/**
* Read frame from file.
* Read the frame header then delegate reading of data to frame body.
*
* @param byteBuffer
*/
public void read(ByteBuffer byteBuffer) throws InvalidFrameException, InvalidDataTypeException
{
String identifier = readIdentifier(byteBuffer);
byte[] buffer = new byte[getFrameSizeSize()];
// Is this a valid identifier?
if (!isValidID3v2FrameIdentifier(identifier))
{
logger.config("Invalid identifier:" + identifier);
byteBuffer.position(byteBuffer.position() - (getFrameIdSize() - 1));
throw new InvalidFrameIdentifierException(getLoggingFilename() + ":" + identifier + ":is not a valid ID3v2.20 frame");
}
//Read Frame Size (same size as Frame Id so reuse buffer)
byteBuffer.get(buffer, 0, getFrameSizeSize());
frameSize = decodeSize(buffer);
if (frameSize < 0)
{
throw new InvalidFrameException(identifier + " has invalid size of:" + frameSize);
}
else if (frameSize == 0)
{
//We dont process this frame or add to framemap becuase contains no useful information
logger.warning("Empty Frame:" + identifier);
throw new EmptyFrameException(identifier + " is empty frame");
}
else if (frameSize > byteBuffer.remaining())
{
logger.warning("Invalid Frame size larger than size before mp3 audio:" + identifier);
throw new InvalidFrameException(identifier + " is invalid frame");
}
else
{
logger.fine("Frame Size Is:" + frameSize);
//Convert v2.2 to v2.4 id just for reading the data
String id = ID3Tags.convertFrameID22To24(identifier);
if (id == null)
{
//OK,it may be convertable to a v.3 id even though not valid v.4
id = ID3Tags.convertFrameID22To23(identifier);
if (id == null)
{
// Is it a valid v22 identifier so should be able to find a
// frame body for it.
if (ID3Tags.isID3v22FrameIdentifier(identifier))
{
id = identifier;
}
// Unknown so will be created as FrameBodyUnsupported
else
{
id = UNSUPPORTED_ID;
}
}
}
logger.fine("Identifier was:" + identifier + " reading using:" + id);
//Create Buffer that only contains the body of this frame rather than the remainder of tag
ByteBuffer frameBodyBuffer = byteBuffer.slice();
frameBodyBuffer.limit(frameSize);
try
{
frameBody = readBody(id, frameBodyBuffer, frameSize);
}
finally
{
//Update position of main buffer, so no attempt is made to reread these bytes
byteBuffer.position(byteBuffer.position() + frameSize);
}
}
}
/**
* Read Frame Size, which has to be decoded
* @param buffer
* @return
*/
private int decodeSize(byte[] buffer)
{
BigInteger bi = new BigInteger(buffer);
int tmpSize = bi.intValue();
if (tmpSize < 0)
{
logger.warning("Invalid Frame Size of:" + tmpSize + "Decoded from bin:" + Integer.toBinaryString(tmpSize) + "Decoded from hex:" + Integer.toHexString(tmpSize));
}
return tmpSize;
}
/**
* Write Frame raw data
*
* @throws IOException
*/
public void write(ByteArrayOutputStream tagBuffer)
{
logger.config("Write Frame to Buffer" + getIdentifier());
//This is where we will write header, move position to where we can
//write body
ByteBuffer headerBuffer = ByteBuffer.allocate(getFrameHeaderSize());
//Write Frame Body Data
ByteArrayOutputStream bodyOutputStream = new ByteArrayOutputStream();
((AbstractID3v2FrameBody) frameBody).write(bodyOutputStream);
//Write Frame Header
//Write Frame ID must adjust can only be 3 bytes long
headerBuffer.put(Utils.getDefaultBytes(getIdentifier(), "ISO-8859-1"), 0, getFrameIdSize());
encodeSize(headerBuffer, frameBody.getSize());
//Add header to the Byte Array Output Stream
try
{
tagBuffer.write(headerBuffer.array());
//Add body to the Byte Array Output Stream
tagBuffer.write(bodyOutputStream.toByteArray());
}
catch (IOException ioe)
{
//This could never happen coz not writing to file, so convert to RuntimeException
throw new RuntimeException(ioe);
}
}
/**
* Write Frame Size (can now be accurately calculated, have to convert 4 byte int
* to 3 byte format.
* @param headerBuffer
* @param size
*/
private void encodeSize(ByteBuffer headerBuffer, int size)
{
headerBuffer.put((byte) ((size & 0x00FF0000) >> 16));
headerBuffer.put((byte) ((size & 0x0000FF00) >> 8));
headerBuffer.put((byte) (size & 0x000000FF));
logger.fine("Frame Size Is Actual:" + size + ":Encoded bin:" + Integer.toBinaryString(size) + ":Encoded Hex" + Integer.toHexString(size));
}
/**
* Does the frame identifier meet the syntax for a idv3v2 frame identifier.
* must start with a capital letter and only contain capital letters and numbers
*
* @param identifier
* @return
*/
public boolean isValidID3v2FrameIdentifier(String identifier)
{
Matcher m = ID3v22Frame.validFrameIdentifier.matcher(identifier);
return m.matches();
}
/**
* Return String Representation of body
*/
public void createStructure()
{
MP3File.getStructureFormatter().openHeadingElement(TYPE_FRAME, getIdentifier());
MP3File.getStructureFormatter().addElement(TYPE_FRAME_SIZE, frameSize);
frameBody.createStructure();
MP3File.getStructureFormatter().closeHeadingElement(TYPE_FRAME);
}
/**
* @return true if considered a common frame
*/
public boolean isCommon()
{
return ID3v22Frames.getInstanceOf().isCommon(getId());
}
/**
* @return true if considered a common frame
*/
public boolean isBinary()
{
return ID3v22Frames.getInstanceOf().isBinary(getId());
}
/**
* Sets the charset encoding used by the field.
*
* @param encoding charset.
*/
public void setEncoding(String encoding)
{
Integer encodingId = TextEncoding.getInstanceOf().getIdForValue(encoding);
if(encoding!=null)
{
if(encodingId <2)
{
this.getBody().setTextEncoding(encodingId.byteValue());
}
}
}
}
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