1/*
2 * Copyright (C) 2014 The Android Open Source Project
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.android.incallui.call;
18
19import android.support.annotation.NonNull;
20import android.support.annotation.Nullable;
21import java.util.Collections;
22import java.util.Objects;
23import java.util.Set;
24import java.util.concurrent.ConcurrentHashMap;
25
26/** Class used to notify interested parties of incoming video related events. */
27public class InCallVideoCallCallbackNotifier {
28
29  /** Singleton instance of this class. */
30  private static InCallVideoCallCallbackNotifier sInstance = new InCallVideoCallCallbackNotifier();
31
32  /**
33   * ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is load factor before
34   * resizing, 1 means we only expect a single thread to access the map so make only a single shard
35   */
36  private final Set<SurfaceChangeListener> mSurfaceChangeListeners =
37      Collections.newSetFromMap(new ConcurrentHashMap<SurfaceChangeListener, Boolean>(8, 0.9f, 1));
38
39  /** Private constructor. Instance should only be acquired through getRunningInstance(). */
40  private InCallVideoCallCallbackNotifier() {}
41
42  /** Static singleton accessor method. */
43  public static InCallVideoCallCallbackNotifier getInstance() {
44    return sInstance;
45  }
46
47  /**
48   * Adds a new {@link SurfaceChangeListener}.
49   *
50   * @param listener The listener.
51   */
52  public void addSurfaceChangeListener(@NonNull SurfaceChangeListener listener) {
53    Objects.requireNonNull(listener);
54    mSurfaceChangeListeners.add(listener);
55  }
56
57  /**
58   * Remove a {@link SurfaceChangeListener}.
59   *
60   * @param listener The listener.
61   */
62  public void removeSurfaceChangeListener(@Nullable SurfaceChangeListener listener) {
63    if (listener != null) {
64      mSurfaceChangeListeners.remove(listener);
65    }
66  }
67
68  /**
69   * Inform listeners of a change to peer dimensions.
70   *
71   * @param call The call.
72   * @param width New peer width.
73   * @param height New peer height.
74   */
75  public void peerDimensionsChanged(DialerCall call, int width, int height) {
76    for (SurfaceChangeListener listener : mSurfaceChangeListeners) {
77      listener.onUpdatePeerDimensions(call, width, height);
78    }
79  }
80
81  /**
82   * Inform listeners of a change to camera dimensions.
83   *
84   * @param call The call.
85   * @param width The new camera video width.
86   * @param height The new camera video height.
87   */
88  public void cameraDimensionsChanged(DialerCall call, int width, int height) {
89    for (SurfaceChangeListener listener : mSurfaceChangeListeners) {
90      listener.onCameraDimensionsChange(call, width, height);
91    }
92  }
93
94  /**
95   * Listener interface for any class that wants to be notified of changes to the video surfaces.
96   */
97  public interface SurfaceChangeListener {
98
99    /**
100     * Called when the peer video feed changes dimensions. This can occur when the peer rotates
101     * their device, changing the aspect ratio of the video signal.
102     *
103     * @param call The call which experienced a peer video
104     */
105    void onUpdatePeerDimensions(DialerCall call, int width, int height);
106
107    /**
108     * Called when the local camera changes dimensions. This occurs when a change in camera occurs.
109     *
110     * @param call The call which experienced the camera dimension change.
111     * @param width The new camera video width.
112     * @param height The new camera video height.
113     */
114    void onCameraDimensionsChange(DialerCall call, int width, int height);
115  }
116}
117