1 files changed, 116 insertions, 0 deletions
diff --git a/java/com/android/incallui/call/InCallVideoCallCallbackNotifier.java b/java/com/android/incallui/call/InCallVideoCallCallbackNotifier.java
new file mode 100644
index 000000000..ff94120bf
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+++ b/java/com/android/incallui/call/InCallVideoCallCallbackNotifier.java
@@ -0,0 +1,116 @@
+/*
+ * 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);
+  }
+}