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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* 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.source;
import androidx.annotation.Nullable;
import org.mozilla.thirdparty.com.google.android.exoplayer2.C;
import org.mozilla.thirdparty.com.google.android.exoplayer2.ExoPlayer;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Player;
import org.mozilla.thirdparty.com.google.android.exoplayer2.Timeline;
import org.mozilla.thirdparty.com.google.android.exoplayer2.source.ShuffleOrder.UnshuffledShuffleOrder;
import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.Allocator;
import org.mozilla.thirdparty.com.google.android.exoplayer2.upstream.TransferListener;
import org.mozilla.thirdparty.com.google.android.exoplayer2.util.Assertions;
import java.util.HashMap;
import java.util.Map;
/**
* Loops a {@link MediaSource} a specified number of times.
*
* <p>Note: To loop a {@link MediaSource} indefinitely, it is usually better to use {@link
* ExoPlayer#setRepeatMode(int)} instead of this class.
*/
public final class LoopingMediaSource extends CompositeMediaSource<Void> {
private final MediaSource childSource;
private final int loopCount;
private final Map<MediaPeriodId, MediaPeriodId> childMediaPeriodIdToMediaPeriodId;
private final Map<MediaPeriod, MediaPeriodId> mediaPeriodToChildMediaPeriodId;
/**
* Loops the provided source indefinitely. Note that it is usually better to use
* {@link ExoPlayer#setRepeatMode(int)}.
*
* @param childSource The {@link MediaSource} to loop.
*/
public LoopingMediaSource(MediaSource childSource) {
this(childSource, Integer.MAX_VALUE);
}
/**
* Loops the provided source a specified number of times.
*
* @param childSource The {@link MediaSource} to loop.
* @param loopCount The desired number of loops. Must be strictly positive.
*/
public LoopingMediaSource(MediaSource childSource, int loopCount) {
Assertions.checkArgument(loopCount > 0);
this.childSource = childSource;
this.loopCount = loopCount;
childMediaPeriodIdToMediaPeriodId = new HashMap<>();
mediaPeriodToChildMediaPeriodId = new HashMap<>();
}
@Override
@Nullable
public Object getTag() {
return childSource.getTag();
}
@Override
protected void prepareSourceInternal(@Nullable TransferListener mediaTransferListener) {
super.prepareSourceInternal(mediaTransferListener);
prepareChildSource(/* id= */ null, childSource);
}
@Override
public MediaPeriod createPeriod(MediaPeriodId id, Allocator allocator, long startPositionUs) {
if (loopCount == Integer.MAX_VALUE) {
return childSource.createPeriod(id, allocator, startPositionUs);
}
Object childPeriodUid = LoopingTimeline.getChildPeriodUidFromConcatenatedUid(id.periodUid);
MediaPeriodId childMediaPeriodId = id.copyWithPeriodUid(childPeriodUid);
childMediaPeriodIdToMediaPeriodId.put(childMediaPeriodId, id);
MediaPeriod mediaPeriod =
childSource.createPeriod(childMediaPeriodId, allocator, startPositionUs);
mediaPeriodToChildMediaPeriodId.put(mediaPeriod, childMediaPeriodId);
return mediaPeriod;
}
@Override
public void releasePeriod(MediaPeriod mediaPeriod) {
childSource.releasePeriod(mediaPeriod);
MediaPeriodId childMediaPeriodId = mediaPeriodToChildMediaPeriodId.remove(mediaPeriod);
if (childMediaPeriodId != null) {
childMediaPeriodIdToMediaPeriodId.remove(childMediaPeriodId);
}
}
@Override
protected void onChildSourceInfoRefreshed(Void id, MediaSource mediaSource, Timeline timeline) {
Timeline loopingTimeline =
loopCount != Integer.MAX_VALUE
? new LoopingTimeline(timeline, loopCount)
: new InfinitelyLoopingTimeline(timeline);
refreshSourceInfo(loopingTimeline);
}
@Override
protected @Nullable MediaPeriodId getMediaPeriodIdForChildMediaPeriodId(
Void id, MediaPeriodId mediaPeriodId) {
return loopCount != Integer.MAX_VALUE
? childMediaPeriodIdToMediaPeriodId.get(mediaPeriodId)
: mediaPeriodId;
}
private static final class LoopingTimeline extends AbstractConcatenatedTimeline {
private final Timeline childTimeline;
private final int childPeriodCount;
private final int childWindowCount;
private final int loopCount;
public LoopingTimeline(Timeline childTimeline, int loopCount) {
super(/* isAtomic= */ false, new UnshuffledShuffleOrder(loopCount));
this.childTimeline = childTimeline;
childPeriodCount = childTimeline.getPeriodCount();
childWindowCount = childTimeline.getWindowCount();
this.loopCount = loopCount;
if (childPeriodCount > 0) {
Assertions.checkState(loopCount <= Integer.MAX_VALUE / childPeriodCount,
"LoopingMediaSource contains too many periods");
}
}
@Override
public int getWindowCount() {
return childWindowCount * loopCount;
}
@Override
public int getPeriodCount() {
return childPeriodCount * loopCount;
}
@Override
protected int getChildIndexByPeriodIndex(int periodIndex) {
return periodIndex / childPeriodCount;
}
@Override
protected int getChildIndexByWindowIndex(int windowIndex) {
return windowIndex / childWindowCount;
}
@Override
protected int getChildIndexByChildUid(Object childUid) {
if (!(childUid instanceof Integer)) {
return C.INDEX_UNSET;
}
return (Integer) childUid;
}
@Override
protected Timeline getTimelineByChildIndex(int childIndex) {
return childTimeline;
}
@Override
protected int getFirstPeriodIndexByChildIndex(int childIndex) {
return childIndex * childPeriodCount;
}
@Override
protected int getFirstWindowIndexByChildIndex(int childIndex) {
return childIndex * childWindowCount;
}
@Override
protected Object getChildUidByChildIndex(int childIndex) {
return childIndex;
}
}
private static final class InfinitelyLoopingTimeline extends ForwardingTimeline {
public InfinitelyLoopingTimeline(Timeline timeline) {
super(timeline);
}
@Override
public int getNextWindowIndex(int windowIndex, @Player.RepeatMode int repeatMode,
boolean shuffleModeEnabled) {
int childNextWindowIndex = timeline.getNextWindowIndex(windowIndex, repeatMode,
shuffleModeEnabled);
return childNextWindowIndex == C.INDEX_UNSET ? getFirstWindowIndex(shuffleModeEnabled)
: childNextWindowIndex;
}
@Override
public int getPreviousWindowIndex(int windowIndex, @Player.RepeatMode int repeatMode,
boolean shuffleModeEnabled) {
int childPreviousWindowIndex = timeline.getPreviousWindowIndex(windowIndex, repeatMode,
shuffleModeEnabled);
return childPreviousWindowIndex == C.INDEX_UNSET ? getLastWindowIndex(shuffleModeEnabled)
: childPreviousWindowIndex;
}
}
}
|
