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
|
/*
* Copyright (C) 2016 The Android Open Source Project
*
* 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.mozilla.thirdparty.com.google.android.exoplayer2.drm;
import android.os.Looper;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.drm.DrmInitData.SchemeData;
/**
* Manages a DRM session.
*/
public interface DrmSessionManager<T extends ExoMediaCrypto> {
/** Returns {@link #DUMMY}. */
@SuppressWarnings("unchecked")
static <T extends ExoMediaCrypto> DrmSessionManager<T> getDummyDrmSessionManager() {
return (DrmSessionManager<T>) DUMMY;
}
/** {@link DrmSessionManager} that supports no DRM schemes. */
DrmSessionManager<ExoMediaCrypto> DUMMY =
new DrmSessionManager<ExoMediaCrypto>() {
@Override
public boolean canAcquireSession(DrmInitData drmInitData) {
return false;
}
@Override
public DrmSession<ExoMediaCrypto> acquireSession(
Looper playbackLooper, DrmInitData drmInitData) {
return new ErrorStateDrmSession<>(
new DrmSession.DrmSessionException(
new UnsupportedDrmException(UnsupportedDrmException.REASON_UNSUPPORTED_SCHEME)));
}
@Override
@Nullable
public Class<ExoMediaCrypto> getExoMediaCryptoType(DrmInitData drmInitData) {
return null;
}
};
/**
* Acquires any required resources.
*
* <p>{@link #release()} must be called to ensure the acquired resources are released. After
* releasing, an instance may be re-prepared.
*/
default void prepare() {
// Do nothing.
}
/** Releases any acquired resources. */
default void release() {
// Do nothing.
}
/**
* Returns whether the manager is capable of acquiring a session for the given
* {@link DrmInitData}.
*
* @param drmInitData DRM initialization data.
* @return Whether the manager is capable of acquiring a session for the given
* {@link DrmInitData}.
*/
boolean canAcquireSession(DrmInitData drmInitData);
/**
* Returns a {@link DrmSession} that does not execute key requests, with an incremented reference
* count. When the caller no longer needs to use the instance, it must call {@link
* DrmSession#release()} to decrement the reference count.
*
* <p>Placeholder {@link DrmSession DrmSessions} may be used to configure secure decoders for
* playback of clear content periods. This can reduce the cost of transitioning between clear and
* encrypted content periods.
*
* @param playbackLooper The looper associated with the media playback thread.
* @param trackType The type of the track to acquire a placeholder session for. Must be one of the
* {@link C}{@code .TRACK_TYPE_*} constants.
* @return The placeholder DRM session, or null if this DRM session manager does not support
* placeholder sessions.
*/
@Nullable
default DrmSession<T> acquirePlaceholderSession(Looper playbackLooper, int trackType) {
return null;
}
/**
* Returns a {@link DrmSession} for the specified {@link DrmInitData}, with an incremented
* reference count. When the caller no longer needs to use the instance, it must call {@link
* DrmSession#release()} to decrement the reference count.
*
* @param playbackLooper The looper associated with the media playback thread.
* @param drmInitData DRM initialization data. All contained {@link SchemeData}s must contain
* non-null {@link SchemeData#data}.
* @return The DRM session.
*/
DrmSession<T> acquireSession(Looper playbackLooper, DrmInitData drmInitData);
/**
* Returns the {@link ExoMediaCrypto} type returned by sessions acquired using the given {@link
* DrmInitData}, or null if a session cannot be acquired with the given {@link DrmInitData}.
*/
@Nullable
Class<? extends ExoMediaCrypto> getExoMediaCryptoType(DrmInitData drmInitData);
}
|
