/* * 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 org.mp4parser.boxes.iso14496.part12; import org.mp4parser.BoxParser; import org.mp4parser.FullBox; import org.mp4parser.support.AbstractContainerBox; import org.mp4parser.tools.IsoTypeReader; import org.mp4parser.tools.IsoTypeWriter; import java.io.IOException; import java.nio.ByteBuffer; import java.nio.channels.ReadableByteChannel; import java.nio.channels.WritableByteChannel; /** * <h1>4cc = "{@value #TYPE}"</h1> * 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 DataEntryUrlBox * @see DataEntryUrnBox */ public class DataReferenceBox extends AbstractContainerBox implements FullBox { public static final String TYPE = "dref"; private int version; private int flags; public DataReferenceBox() { super(TYPE); } public int getVersion() { return version; } public void setVersion(int version) { this.version = version; } public int getFlags() { return flags; } public void setFlags(int flags) { this.flags = flags; } @Override public void parse(ReadableByteChannel dataSource, ByteBuffer header, long contentSize, BoxParser boxParser) throws IOException { ByteBuffer versionFlagNumOfChildBoxes = ByteBuffer.allocate(8); dataSource.read(versionFlagNumOfChildBoxes); versionFlagNumOfChildBoxes.rewind(); version = IsoTypeReader.readUInt8(versionFlagNumOfChildBoxes); flags = IsoTypeReader.readUInt24(versionFlagNumOfChildBoxes); // number of child boxes is not required - ignore initContainer(dataSource, contentSize - 8, boxParser); } @Override public void getBox(WritableByteChannel writableByteChannel) throws IOException { writableByteChannel.write(getHeader()); ByteBuffer versionFlagNumOfChildBoxes = ByteBuffer.allocate(8); IsoTypeWriter.writeUInt8(versionFlagNumOfChildBoxes, version); IsoTypeWriter.writeUInt24(versionFlagNumOfChildBoxes, flags); IsoTypeWriter.writeUInt32(versionFlagNumOfChildBoxes, getBoxes().size()); writableByteChannel.write((ByteBuffer) versionFlagNumOfChildBoxes.rewind()); writeContainer(writableByteChannel); } @Override public long getSize() { long s = getContainerSize(); long t = 8; return s + t + ((largeBox || (s + t + 8) >= (1L << 32)) ? 16 : 8); } }