Fix issues with video auto-fullscreen mode.

There were a few issues with the auto-fullscreen mode code which is present in
video calls.
1. If the Incall UI is backgrounded, the auto-fullscreen mode code would still
trigger and put the user into fullscreen mode when they return to the InCall
UI.
2. If the user is already in a video call and the remote party enables their
camera, the auto fullscreen mode code would trigger and enable fullscreen mode.
Ultimately we only want to go into fullscreen mode if we are entering a video
call from a non-video state.
3. It is possible for the call to cease to be a video call by the time the auto
fullscreen code triggers, meaning that an audio only call would go into
fullscreen mode:

Change-Id: I338a9ba4bb8d171752dcb38c16363bf0ded701af
CL: 120864913
Bug: 28093622

2 files changed, 29 insertions, 22 deletions

diff --git a/InCallUI/src/com/android/incallui/VideoCallFragment.java b/InCallUI/src/com/android/incallui/VideoCallFragment.java
index cb8c6449b..2e65f81b4 100644
--- a/InCallUI/src/com/android/incallui/VideoCallFragment.java
+++ b/InCallUI/src/com/android/incallui/VideoCallFragment.java
@@ -499,6 +499,7 @@ public class VideoCallFragment extends BaseFragment<VideoCallPresenter,
     public void onPause() {
         super.onPause();
         Log.d(this, "onPause:");
+        getPresenter().cancelAutoFullScreen();
     }
 
     @Override
@@ -549,6 +550,7 @@ public class VideoCallFragment extends BaseFragment<VideoCallPresenter,
      * Hides and shows the incoming video view and changes the outgoing video view's state based on
      * whether outgoing view is enabled or not.
      */
+    @Override
     public void showVideoViews(boolean previewPaused, boolean showIncoming) {
         inflateVideoUi(true);
 
@@ -567,6 +569,7 @@ public class VideoCallFragment extends BaseFragment<VideoCallPresenter,
     /**
      * Hide all video views.
      */
+    @Override
     public void hideVideoUi() {
         inflateVideoUi(false);
     }
diff --git a/InCallUI/src/com/android/incallui/VideoCallPresenter.java b/InCallUI/src/com/android/incallui/VideoCallPresenter.java
index 9a33d80eb..7617608d1 100644
--- a/InCallUI/src/com/android/incallui/VideoCallPresenter.java
+++ b/InCallUI/src/com/android/incallui/VideoCallPresenter.java
@@ -81,7 +81,9 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
     private Runnable mAutoFullscreenRunnable =  new Runnable() {
         @Override
         public void run() {
-            if (mAutoFullScreenPending && !InCallPresenter.getInstance().isDialpadVisible()) {
+            if (mAutoFullScreenPending && !InCallPresenter.getInstance().isDialpadVisible()
+                    && mIsVideoMode) {
+
                 Log.v(this, "Automatically entering fullscreen mode.");
                 InCallPresenter.getInstance().setFullScreen(true);
                 mAutoFullScreenPending = false;
@@ -258,6 +260,8 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
             return;
         }
 
+        cancelAutoFullScreen();
+
         InCallPresenter.getInstance().removeListener(this);
         InCallPresenter.getInstance().removeDetailsListener(this);
         InCallPresenter.getInstance().removeIncomingCallListener(this);
@@ -495,7 +499,7 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
         updateCameraSelection(call);
 
         if (isVideoCall) {
-            enterVideoMode(call);
+            adjustVideoMode(call);
         } else if (isVideoMode()) {
             exitVideoMode();
         }
@@ -555,7 +559,7 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
             Log.d(this, "onPrimaryCallChanged: Entering video mode...");
 
             updateCameraSelection(newPrimaryCall);
-            enterVideoMode(newPrimaryCall);
+            adjustVideoMode(newPrimaryCall);
         }
     }
 
@@ -630,7 +634,7 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
      * Handles a change to the video call. Sets the surfaces on the previous call to null and sets
      * the surfaces on the new video call accordingly.
      *
-     * @param videoCall The new video call.
+     * @param call The new video call.
      */
     private void changeVideoCall(Call call) {
         final VideoCall videoCall = call.getTelecomCall().getVideoCall();
@@ -651,13 +655,13 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
         }
 
         if (VideoUtils.isVideoCall(call) && hasChanged) {
-            enterVideoMode(call);
+            adjustVideoMode(call);
         }
     }
 
     private static boolean isCameraRequired(int videoState) {
-        return VideoProfile.isBidirectional(videoState) ||
-                VideoProfile.isTransmissionEnabled(videoState);
+        return VideoProfile.isBidirectional(videoState)
+                || VideoProfile.isTransmissionEnabled(videoState);
     }
 
     private boolean isCameraRequired() {
@@ -665,14 +669,16 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
     }
 
     /**
-     * Enters video mode by showing the video surfaces and making other adjustments (eg. audio).
+     * Adjusts the current video mode by setting up the preview and display surfaces as necessary.
+     * Expected to be called whenever the video state associated with a call changes (e.g. a user
+     * turns their camera on or off) to ensure the correct surfaces are shown/hidden.
      * TODO(vt): Need to adjust size and orientation of preview surface here.
      */
-    private void enterVideoMode(Call call) {
+    private void adjustVideoMode(Call call) {
         VideoCall videoCall = call.getVideoCall();
         int newVideoState = call.getVideoState();
 
-        Log.d(this, "enterVideoMode videoCall= " + videoCall + " videoState: " + newVideoState);
+        Log.d(this, "adjustVideoMode videoCall= " + videoCall + " videoState: " + newVideoState);
         VideoCallUi ui = getUi();
         if (ui == null) {
             Log.e(this, "Error VideoCallUi is null so returning");
@@ -692,16 +698,15 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
             videoCall.setDeviceOrientation(mDeviceOrientation);
             enableCamera(videoCall, isCameraRequired(newVideoState));
         }
+        int previousVideoState = mCurrentVideoState;
         mCurrentVideoState = newVideoState;
-
         mIsVideoMode = true;
 
-        maybeAutoEnterFullscreen(call);
-    }
-
-    private static boolean isSpeakerEnabledForVideoCalls() {
-        // TODO: Make this a carrier configurable setting. For now this is always true. b/20090407
-        return true;
+        // adjustVideoMode may be called if we are already in a 1-way video state.  In this case
+        // we do not want to trigger auto-fullscreen mode.
+        if (!VideoUtils.isVideoCall(previousVideoState) && VideoUtils.isVideoCall(newVideoState)) {
+            maybeAutoEnterFullscreen(call);
+        }
     }
 
     private void enableCamera(VideoCall videoCall, boolean isCameraRequired) {
@@ -1068,6 +1073,8 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
      * 2. Call is not active
      * 3. Call is not video call
      * 4. Already in fullscreen mode
+     * 5. The current video state is not bi-directional (if the remote party stops transmitting,
+     *    the user's contact photo would dominate in fullscreen mode).
      *
      * @param call The current call.
      */
@@ -1079,7 +1086,8 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
         if (call == null || (
                 call != null && (call.getState() != Call.State.ACTIVE ||
                         !VideoUtils.isVideoCall(call)) ||
-                        InCallPresenter.getInstance().isFullscreen())) {
+                        InCallPresenter.getInstance().isFullscreen()) ||
+                        !VideoUtils.isBidirectionalVideoCall(call)) {
             // Ensure any previously scheduled attempt to enter fullscreen is cancelled.
             cancelAutoFullScreen();
             return;
@@ -1106,10 +1114,6 @@ public class VideoCallPresenter extends Presenter<VideoCallPresenter.VideoCallUi
         mAutoFullScreenPending = false;
     }
 
-    private static boolean isAudioRouteEnabled(int audioRoute, int audioRouteMask) {
-        return ((audioRoute & audioRouteMask) != 0);
-    }
-
     private static void updateCameraSelection(Call call) {
         Log.d(TAG, "updateCameraSelection: call=" + call);
         Log.d(TAG, "updateCameraSelection: call=" + toSimpleString(call));