1 /*
2  * Copyright 2008 CoreMedia AG, Hamburg
3  *
4  * Licensed under the Apache License, Version 2.0 (the License);
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an AS IS BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.coremedia.iso.boxes;
18 
19 import com.googlecode.mp4parser.AbstractContainerBox;
20 
21 /**
22  * <code>
23  * Box Type: 'tref'<br>
24  * Container: {@link TrackBox} ('trak')<br>
25  * Mandatory: No<br>
26  * Quantity: Zero or one<br><br>
27  * </code>
28  * This box provides a reference from the containing track to another track in the presentation. These references
29  * are typed. A 'hint' reference links from the containing hint track to the media data that it hints. A content
30  * description reference 'cdsc' links a descriptive or metadata track to the content which it describes.
31  * Exactly one Track Reference Box can be contained within the Track Box.
32  * If this box is not present, the track is not referencing any other track in any way. The reference array is sized
33  * to fill the reference type box.
34  */
35 public class TrackReferenceBox extends AbstractContainerBox {
36     public static final String TYPE = "tref";
37 
TrackReferenceBox()38     public TrackReferenceBox() {
39         super(TYPE);
40     }
41 }
42