/*
* Entagged Audio Tag library
* Copyright (c) 2003-2005 Raphaël Slinckx <raphael@slinckx.net>
*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.jaudiotagger.tag.mp4.field;
import org.jaudiotagger.audio.mp4.atom.Mp4BoxHeader;
import org.jaudiotagger.tag.TagField;
import org.jaudiotagger.tag.mp4.Mp4TagField;
import org.jaudiotagger.tag.mp4.atom.Mp4DataBox;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
/**
* Represents binary data
* <p/>
* <p>Subclassed by cover art field,
* TODO unaware of any other binary fields at the moment
*/
public class Mp4TagBinaryField extends Mp4TagField {
protected int dataSize;
protected byte[] dataBytes;
protected boolean isBinary = false;
/**
* Construct an empty Binary Field
*
* @param id
*/
public Mp4TagBinaryField(String id) {
super(id);
}
/**
* Construct new binary field with binarydata provided
*
* @param id
* @param data
* @throws UnsupportedEncodingException
*/
public Mp4TagBinaryField(String id, byte[] data) {
super(id);
this.dataBytes = data;
}
/**
* Construct binary field from rawdata of audio file
*
* @param id
* @param raw
* @throws UnsupportedEncodingException
*/
public Mp4TagBinaryField(String id, ByteBuffer raw) throws UnsupportedEncodingException {
super(id, raw);
}
public Mp4FieldType getFieldType() {
//TODO dont know what value this should be do we actually have any binary fields other
//than cover art
return Mp4FieldType.IMPLICIT;
}
/**
* Used when creating raw content
*
* @return
* @throws UnsupportedEncodingException
*/
protected byte[] getDataBytes() throws UnsupportedEncodingException {
return dataBytes;
}
protected void build(ByteBuffer raw) {
Mp4BoxHeader header = new Mp4BoxHeader(raw);
dataSize = header.getDataLength();
//Skip the version and length fields
raw.position(raw.position() + Mp4DataBox.PRE_DATA_LENGTH);
//Read the raw data into byte array
this.dataBytes = new byte[dataSize - Mp4DataBox.PRE_DATA_LENGTH];
for (int i = 0; i < dataBytes.length; i++) {
this.dataBytes[i] = raw.get();
}
//After returning buffers position will be after the end of this atom
}
public boolean isBinary() {
return isBinary;
}
public boolean isEmpty() {
return this.dataBytes.length == 0;
}
public int getDataSize() {
return dataSize;
}
public byte[] getData() {
return this.dataBytes;
}
public void setData(byte[] d) {
this.dataBytes = d;
}
public void copyContent(TagField field) {
if (field instanceof Mp4TagBinaryField) {
this.dataBytes = ((Mp4TagBinaryField) field).getData();
this.isBinary = field.isBinary();
}
}
}