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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
|
/*
* Copyright (C) 2014 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 com.android.incallui;
import com.google.common.base.Preconditions;
import com.google.common.collect.Sets;
import java.util.Set;
/**
* Class used by {@link InCallVideoClient}s to notify interested parties of incoming events.
*/
public class CallVideoClientNotifier {
/**
* Singleton instance of this class.
*/
private static CallVideoClientNotifier sInstance = new CallVideoClientNotifier();
private final Set<SessionModificationListener> mSessionModificationListeners =
Sets.newHashSet();
private final Set<VideoEventListener> mVideoEventListeners = Sets.newHashSet();
private final Set<SurfaceChangeListener> mSurfaceChangeListeners = Sets.newHashSet();
/**
* Static singleton accessor method.
*/
public static CallVideoClientNotifier getInstance() {
return sInstance;
}
/**
* Private constructor. Instance should only be acquired through getInstance().
*/
private CallVideoClientNotifier() {
}
/**
* Adds a new {@link SessionModificationListener}.
*
* @param listener The listener.
*/
public void addSessionModificationListener(SessionModificationListener listener) {
Preconditions.checkNotNull(listener);
mSessionModificationListeners.add(listener);
}
/**
* Remove a {@link SessionModificationListener}.
*
* @param listener The listener.
*/
public void removeSessionModificationListener(SessionModificationListener listener) {
Preconditions.checkNotNull(listener);
mSessionModificationListeners.remove(listener);
}
/**
* Adds a new {@link VideoEventListener}.
*
* @param listener The listener.
*/
public void addVideoEventListener(VideoEventListener listener) {
Preconditions.checkNotNull(listener);
mVideoEventListeners.add(listener);
}
/**
* Remove a {@link VideoEventListener}.
*
* @param listener The listener.
*/
public void removeVideoEventListener(VideoEventListener listener) {
Preconditions.checkNotNull(listener);
mVideoEventListeners.remove(listener);
}
/**
* Adds a new {@link SurfaceChangeListener}.
*
* @param listener The listener.
*/
public void addSurfaceChangeListener(SurfaceChangeListener listener) {
Preconditions.checkNotNull(listener);
mSurfaceChangeListeners.add(listener);
}
/**
* Remove a {@link SurfaceChangeListener}.
*
* @param listener The listener.
*/
public void removeSurfaceChangeListener(SurfaceChangeListener listener) {
Preconditions.checkNotNull(listener);
mSurfaceChangeListeners.remove(listener);
}
/**
* Inform listeners of an upgrade to video request for a call.
*
* @param call The call.
*/
public void upgradeToVideoRequest(Call call) {
for (SessionModificationListener listener : mSessionModificationListeners) {
listener.onUpgradeToVideoRequest(call);
}
}
/**
* Inform listeners of a downgrade to audio.
*
* @param call The call.
*/
public void downgradeToAudio(Call call) {
for (SessionModificationListener listener : mSessionModificationListeners) {
listener.onDowngradeToAudio(call);
}
}
/**
* Inform listeners of a downgrade to audio.
*
* @param call The call.
* @param paused The paused state.
*/
public void peerPausedStateChanged(Call call, boolean paused) {
for (VideoEventListener listener : mVideoEventListeners) {
listener.onPeerPauseStateChanged(call, paused);
}
}
/**
* Inform listeners of a change to peer dimensions.
*
* @param call The call.
* @param width New peer width.
* @param height New peer height.
*/
public void peerDimensionsChanged(Call call, int width, int height) {
for (SurfaceChangeListener listener : mSurfaceChangeListeners) {
listener.onUpdatePeerDimensions(call, width, height);
}
}
/**
* Inform listeners of a change to camera dimensions.
*
* @param call The call.
* @param width The new camera video width.
* @param height The new camera video height.
*/
public void cameraDimensionsChanged(Call call, int width, int height) {
for (SurfaceChangeListener listener : mSurfaceChangeListeners) {
listener.onCameraDimensionsChange(call, width, height);
}
}
/**
* Listener interface for any class that wants to be notified of upgrade to video and downgrade
* to audio session modification requests.
*/
public interface SessionModificationListener {
/**
* Called when a peer request is received to upgrade an audio-only call to a video call.
*
* @param call The call the request was received for.
*/
public void onUpgradeToVideoRequest(Call call);
/**
* Called when a call has been downgraded to audio-only.
*
* @param call The call which was downgraded to audio-only.
*/
public void onDowngradeToAudio(Call call);
}
/**
* Listener interface for any class that wants to be notified of video events, including pause
* and un-pause of peer video.
*/
public interface VideoEventListener {
/**
* Called when the peer pauses or un-pauses video transmission.
*
* @param call The call which paused or un-paused video transmission.
* @param paused {@code True} when the video transmission is paused, {@code false}
* otherwise.
*/
public void onPeerPauseStateChanged(Call call, boolean paused);
}
/**
* Listener interface for any class that wants to be notified of changes to the video surfaces.
*/
public interface SurfaceChangeListener {
/**
* Called when the peer video feed changes dimensions. This can occur when the peer rotates
* their device, changing the aspect ratio of the video signal.
*
* @param call The call which experienced a peer video
* @param width
* @param height
*/
public void onUpdatePeerDimensions(Call call, int width, int height);
/**
* Called when the local camera changes dimensions. This occurs when a change in camera
* occurs.
*
* @param call The call which experienced the camera dimension change.
* @param width The new camera video width.
* @param height The new camera video height.
*/
public void onCameraDimensionsChange(Call call, int width, int height);
}
}
|
