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
17package com.coremedia.iso.boxes;
18
19import com.coremedia.iso.IsoTypeReader;
20import com.coremedia.iso.IsoTypeWriter;
21import com.googlecode.mp4parser.AbstractFullBox;
22
23import java.nio.ByteBuffer;
24
25/**
26 * Describes the format of media access units in PDCF files.
27 */
28public 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
37    protected long getContentSize() {
38        return 7;
39    }
40
41    public OmaDrmAccessUnitFormatBox() {
42        super("odaf");
43    }
44
45    public boolean isSelectiveEncryption() {
46        return selectiveEncryption;
47    }
48
49    public int getKeyIndicatorLength() {
50        return keyIndicatorLength;
51    }
52
53    public int getInitVectorLength() {
54        return initVectorLength;
55    }
56
57    public void setInitVectorLength(int initVectorLength) {
58        this.initVectorLength = initVectorLength;
59    }
60
61    public void setKeyIndicatorLength(int keyIndicatorLength) {
62        this.keyIndicatorLength = keyIndicatorLength;
63    }
64
65    public void setAllBits(byte allBits) {
66        this.allBits = allBits;
67        selectiveEncryption = (allBits & 0x80) == 0x80;
68    }
69
70    @Override
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
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