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/*
* Copyright 2008 CoreMedia AG, Hamburg
*
* Licensed under the Apache License, Version 2.0 (the License);
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.coremedia.iso.boxes;
import com.coremedia.iso.IsoTypeWriter;
import com.googlecode.mp4parser.FullContainerBox;
import java.nio.ByteBuffer;
/**
* The data reference object contains a table of data references (normally URLs) that declare the location(s) of
* the media data used within the presentation. The data reference index in the sample description ties entries in
* this table to the samples in the track. A track may be split over several sources in this way.
* If the flag is set indicating that the data is in the same file as this box, then no string (not even an empty one)
* shall be supplied in the entry field.
* The DataEntryBox within the DataReferenceBox shall be either a DataEntryUrnBox or a DataEntryUrlBox.
*
* @see com.coremedia.iso.boxes.DataEntryUrlBox
* @see com.coremedia.iso.boxes.DataEntryUrnBox
*/
public class DataReferenceBox extends FullContainerBox {
public static final String TYPE = "dref";
public DataReferenceBox() {
super(TYPE);
}
@Override
protected long getContentSize() {
return super.getContentSize() + 4;
}
@Override
public void _parseDetails(ByteBuffer content) {
parseVersionAndFlags(content);
content.get(new byte[4]); // basically a skip of 4 bytes signaling the number of child boxes
parseChildBoxes(content);
}
@Override
protected void getContent(ByteBuffer byteBuffer) {
writeVersionAndFlags(byteBuffer);
IsoTypeWriter.writeUInt32(byteBuffer, getBoxes().size());
writeChildBoxes(byteBuffer);
}
}
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