/*
* 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.generic.Utils;
import org.jaudiotagger.audio.mp4.atom.Mp4BoxHeader;
import org.jaudiotagger.tag.TagField;
import org.jaudiotagger.tag.mp4.atom.Mp4DataBox;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.ByteBuffer;
import java.util.List;
/**
* Represents simple text field that contains an array of number,
* <p/>
* <p>But reads the data content as an array of 16 bit unsigned numbers
*/
public class Mp4TagTextNumberField extends Mp4TagTextField {
public static final int NUMBER_LENGTH = 2;
//Holds the numbers decoded
protected List<Short> numbers;
/**
* Create a new number, already parsed in subclasses
*
* @param id
* @param numberArray
*/
public Mp4TagTextNumberField(String id, String numberArray) {
super(id, numberArray);
}
public Mp4TagTextNumberField(String id, ByteBuffer data) throws UnsupportedEncodingException {
super(id, data);
}
/**
* Recreate the raw data content from the list of numbers
*
* @return
*/
protected byte[] getDataBytes() {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
for (Short number : numbers) {
try {
baos.write(Utils.getSizeBEInt16(number));
} catch (IOException e) {
//This should never happen because we are not writing to file at this point.
throw new RuntimeException(e);
}
}
return baos.toByteArray();
}
public void copyContent(TagField field) {
if (field instanceof Mp4TagTextNumberField) {
this.content = ((Mp4TagTextNumberField) field).getContent();
this.numbers = ((Mp4TagTextNumberField) field).getNumbers();
}
}
/**
* @return type numeric
*/
public Mp4FieldType getFieldType() {
return Mp4FieldType.IMPLICIT;
}
protected void build(ByteBuffer data) throws UnsupportedEncodingException {
//Data actually contains a 'Data' Box so process data using this
Mp4BoxHeader header = new Mp4BoxHeader(data);
Mp4DataBox databox = new Mp4DataBox(header, data);
dataSize = header.getDataLength();
content = databox.getContent();
numbers = databox.getNumbers();
}
/**
* @return the individual numbers making up this field
*/
public List<Short> getNumbers() {
return numbers;
}
}