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/*
* 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.call;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import java.util.Collections;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
/** Class used to notify interested parties of incoming video related events. */
public class InCallVideoCallCallbackNotifier {
/** Singleton instance of this class. */
private static InCallVideoCallCallbackNotifier sInstance = new InCallVideoCallCallbackNotifier();
/**
* ConcurrentHashMap constructor params: 8 is initial table size, 0.9f is load factor before
* resizing, 1 means we only expect a single thread to access the map so make only a single shard
*/
private final Set<SurfaceChangeListener> mSurfaceChangeListeners =
Collections.newSetFromMap(new ConcurrentHashMap<SurfaceChangeListener, Boolean>(8, 0.9f, 1));
/** Private constructor. Instance should only be acquired through getRunningInstance(). */
private InCallVideoCallCallbackNotifier() {}
/** Static singleton accessor method. */
public static InCallVideoCallCallbackNotifier getInstance() {
return sInstance;
}
/**
* Adds a new {@link SurfaceChangeListener}.
*
* @param listener The listener.
*/
public void addSurfaceChangeListener(@NonNull SurfaceChangeListener listener) {
Objects.requireNonNull(listener);
mSurfaceChangeListeners.add(listener);
}
/**
* Remove a {@link SurfaceChangeListener}.
*
* @param listener The listener.
*/
public void removeSurfaceChangeListener(@Nullable SurfaceChangeListener listener) {
if (listener != null) {
mSurfaceChangeListeners.remove(listener);
}
}
/**
* 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(DialerCall 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(DialerCall 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 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
*/
void onUpdatePeerDimensions(DialerCall 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.
*/
void onCameraDimensionsChange(DialerCall call, int width, int height);
}
}
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