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.coremedia.iso.IsoTypeReader;
20 import com.coremedia.iso.IsoTypeWriter;
21 import com.googlecode.mp4parser.AbstractFullBox;
22 
23 import java.nio.ByteBuffer;
24 
25 /**
26  * Describes the format of media access units in PDCF files.
27  */
28 public final class OmaDrmAccessUnitFormatBox extends AbstractFullBox {
29     public static final String TYPE = "odaf";
30 
31     private boolean selectiveEncryption;
32     private byte allBits;
33 
34     private int keyIndicatorLength;
35     private int initVectorLength;
36 
getContentSize()37     protected long getContentSize() {
38         return 7;
39     }
40 
OmaDrmAccessUnitFormatBox()41     public OmaDrmAccessUnitFormatBox() {
42         super("odaf");
43     }
44 
isSelectiveEncryption()45     public boolean isSelectiveEncryption() {
46         return selectiveEncryption;
47     }
48 
getKeyIndicatorLength()49     public int getKeyIndicatorLength() {
50         return keyIndicatorLength;
51     }
52 
getInitVectorLength()53     public int getInitVectorLength() {
54         return initVectorLength;
55     }
56 
setInitVectorLength(int initVectorLength)57     public void setInitVectorLength(int initVectorLength) {
58         this.initVectorLength = initVectorLength;
59     }
60 
setKeyIndicatorLength(int keyIndicatorLength)61     public void setKeyIndicatorLength(int keyIndicatorLength) {
62         this.keyIndicatorLength = keyIndicatorLength;
63     }
64 
setAllBits(byte allBits)65     public void setAllBits(byte allBits) {
66         this.allBits = allBits;
67         selectiveEncryption = (allBits & 0x80) == 0x80;
68     }
69 
70     @Override
_parseDetails(ByteBuffer content)71     public void _parseDetails(ByteBuffer content) {
72         parseVersionAndFlags(content);
73         allBits = (byte) IsoTypeReader.readUInt8(content);
74         selectiveEncryption = (allBits & 0x80) == 0x80;
75         keyIndicatorLength = IsoTypeReader.readUInt8(content);
76         initVectorLength = IsoTypeReader.readUInt8(content);
77     }
78 
79     @Override
getContent(ByteBuffer byteBuffer)80     protected void getContent(ByteBuffer byteBuffer) {
81         writeVersionAndFlags(byteBuffer);
82         IsoTypeWriter.writeUInt8(byteBuffer, allBits);
83         IsoTypeWriter.writeUInt8(byteBuffer, keyIndicatorLength);
84         IsoTypeWriter.writeUInt8(byteBuffer, initVectorLength);
85     }
86 
87 }
88