1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
* Copyright 2012 castLabs, Berlin
*
* 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.googlecode.mp4parser.boxes.mp4.samplegrouping;
import com.coremedia.iso.Hex;
import com.coremedia.iso.IsoTypeReader;
import com.coremedia.iso.IsoTypeWriter;
import java.nio.ByteBuffer;
import java.util.Arrays;
/**
* Each sample in a protected track shall be associated with an IsEncrypted flag, IV_Size, and KID.
* This can be accomplished by (a) relying on the default values in the TrackEncryptionBox
* (see 8.2), or (b) specifying the parameters by sample group, or (c) using a combination of these two techniques.
* <p/>
* When specifying the parameters by sample group, the SampleToGroupBox in the sample table or track
* fragment specifies which samples use which sample group description from the SampleGroupDescriptionBox.
*/
public class CencSampleEncryptionInformationGroupEntry extends GroupEntry {
public static final String TYPE = "seig";
private int isEncrypted;
private byte ivSize;
private byte[] kid = new byte[16];
@Override
public void parse(ByteBuffer byteBuffer) {
isEncrypted = IsoTypeReader.readUInt24(byteBuffer);
ivSize = (byte) IsoTypeReader.readUInt8(byteBuffer);
kid = new byte[16];
byteBuffer.get(kid);
}
@Override
public ByteBuffer get() {
ByteBuffer byteBuffer = ByteBuffer.allocate(20);
IsoTypeWriter.writeUInt24(byteBuffer, isEncrypted);
IsoTypeWriter.writeUInt8(byteBuffer, ivSize);
byteBuffer.put(kid);
byteBuffer.rewind();
return byteBuffer;
}
public int getEncrypted() {
return isEncrypted;
}
public void setEncrypted(int encrypted) {
isEncrypted = encrypted;
}
public byte getIvSize() {
return ivSize;
}
public void setIvSize(byte ivSize) {
this.ivSize = ivSize;
}
public byte[] getKid() {
return kid;
}
public void setKid(byte[] kid) {
assert kid.length == 16;
this.kid = kid;
}
@Override
public String toString() {
return "CencSampleEncryptionInformationGroupEntry{" +
"isEncrypted=" + isEncrypted +
", ivSize=" + ivSize +
", kid=" + Hex.encodeHex(kid) +
'}';
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (o == null || getClass() != o.getClass()) {
return false;
}
CencSampleEncryptionInformationGroupEntry that = (CencSampleEncryptionInformationGroupEntry) o;
if (isEncrypted != that.isEncrypted) {
return false;
}
if (ivSize != that.ivSize) {
return false;
}
if (!Arrays.equals(kid, that.kid)) {
return false;
}
return true;
}
@Override
public int hashCode() {
int result = isEncrypted;
result = 31 * result + (int) ivSize;
result = 31 * result + (kid != null ? Arrays.hashCode(kid) : 0);
return result;
}
}
|
