Implement new video-call-related buttons.

- Implemented downgrade/upgrade, switch camera, pause camear.
- Implemented code to find front/back-facing cameraIds.
- Also, cleaned up listener logic in CallButtonFragment to be
more consistent.

Bug: 16014280
Change-Id: I267a73943dc768900b663bb4db6ec52f4a35cac5

3 files changed, 167 insertions, 43 deletions

diff --git a/InCallUI/src/com/android/incallui/Call.java b/InCallUI/src/com/android/incallui/Call.java
index 830b58114..f3986a4fa 100644
--- a/InCallUI/src/com/android/incallui/Call.java
+++ b/InCallUI/src/com/android/incallui/Call.java
@@ -327,8 +327,12 @@ public final class Call {
         return mParentCallId;
     }
 
+    public int getVideoState() {
+        return mTelecommCall.getDetails().getVideoState();
+    }
+
     public boolean isVideoCall() {
-        int videoState = mTelecommCall.getDetails().getVideoState();
+        int videoState = getVideoState();
         return (videoState & VideoCallProfile.VIDEO_STATE_BIDIRECTIONAL)
                 == VideoCallProfile.VIDEO_STATE_BIDIRECTIONAL;
     }
diff --git a/InCallUI/src/com/android/incallui/CallButtonFragment.java b/InCallUI/src/com/android/incallui/CallButtonFragment.java
index 077c8124b..80119a404 100644
--- a/InCallUI/src/com/android/incallui/CallButtonFragment.java
+++ b/InCallUI/src/com/android/incallui/CallButtonFragment.java
@@ -68,8 +68,7 @@ public class CallButtonFragment
 
     @Override
     CallButtonPresenter createPresenter() {
-        // TODO: find a cleaner way to include audio mode provider than
-        // having a singleton instance.
+        // TODO: find a cleaner way to include audio mode provider than having a singleton instance.
         return new CallButtonPresenter();
     }
 
@@ -91,50 +90,20 @@ public class CallButtonFragment
         mExtraRowButton = parent.findViewById(R.id.extraButtonRow);
 
         mManageConferenceButton = parent.findViewById(R.id.manageConferenceButton);
-        mManageConferenceButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                getPresenter().manageConferenceButtonClicked();
-            }
-        });
+        mManageConferenceButton.setOnClickListener(this);
         mGenericMergeButton = parent.findViewById(R.id.cdmaMergeButton);
-        mGenericMergeButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                getPresenter().mergeClicked();
-            }
-        });
-
-        mMuteButton = (ImageButton) parent.findViewById(R.id.muteButton);
-        mMuteButton.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                final ImageButton button = (ImageButton) v;
-                getPresenter().muteClicked(!button.isSelected());
-            }
-        });
+        mGenericMergeButton.setOnClickListener(this);
 
         mAudioButton = (ImageButton) parent.findViewById(R.id.audioButton);
-        mAudioButton.setOnClickListener(new View.OnClickListener() {
-            @Override
-            public void onClick(View view) {
-                onAudioButtonClicked();
-            }
-        });
-
-        mHoldButton = (ImageButton) parent.findViewById(R.id.holdButton);
-        mHoldButton.setOnClickListener(new OnClickListener() {
-            @Override
-            public void onClick(View v) {
-                final ImageButton button = (ImageButton) v;
-                getPresenter().holdClicked(!button.isSelected());
-            }
-        });
-
+        mAudioButton.setOnClickListener(this);
         mChangeToVoiceButton = (ImageButton) parent.findViewById(R.id.changeToVoiceButton);
         mChangeToVoiceButton. setOnClickListener(this);
+        mMuteButton = (ImageButton) parent.findViewById(R.id.muteButton);
+        mMuteButton.setOnClickListener(this);
         mShowDialpadButton = (ImageButton) parent.findViewById(R.id.dialpadButton);
         mShowDialpadButton.setOnClickListener(this);
+        mHoldButton = (ImageButton) parent.findViewById(R.id.holdButton);
+        mHoldButton.setOnClickListener(this);
         mSwapButton = (ImageButton) parent.findViewById(R.id.swapButton);
         mSwapButton.setOnClickListener(this);
         mChangeToVideoButton = (ImageButton) parent.findViewById(R.id.changeToVideoButton);
@@ -159,6 +128,7 @@ public class CallButtonFragment
 
         // set the buttons
         updateAudioButtons(getPresenter().getSupportedAudio());
+        getPresenter().initializeCameraManager(getActivity().getApplicationContext());
     }
 
     @Override
@@ -179,24 +149,51 @@ public class CallButtonFragment
         Log.d(this, "onClick(View " + view + ", id " + id + ")...");
 
         switch(id) {
+            case R.id.audioButton:
+                onAudioButtonClicked();
+                break;
             case R.id.addButton:
                 getPresenter().addCallClicked();
                 break;
+            case R.id.changeToVoiceButton:
+                getPresenter().changeToVoiceClicked();
+                break;
+            case R.id.muteButton: {
+                final ImageButton button = (ImageButton) view;
+                getPresenter().muteClicked(!button.isSelected());
+                break;
+            }
+            case R.id.cdmaMergeButton:
             case R.id.mergeButton:
                 getPresenter().mergeClicked();
                 break;
+            case R.id.holdButton: {
+                final ImageButton button = (ImageButton) view;
+                getPresenter().holdClicked(!button.isSelected());
+                break;
+            }
             case R.id.swapButton:
                 getPresenter().swapClicked();
                 break;
             case R.id.dialpadButton:
                 getPresenter().showDialpadClicked(!mShowDialpadButton.isSelected());
                 break;
-            case R.id.changeToVoiceButton:
             case R.id.changeToVideoButton:
+                getPresenter().changeToVideoClicked();
+                break;
             case R.id.switchCameraButton:
+                getPresenter().switchCameraClicked(
+                        mSwitchCameraButton.isSelected() /* useFrontFacingCamera */);
+                break;
             case R.id.pauseVideoButton:
+                getPresenter().pauseVideoClicked(
+                        !mPauseVideoButton.isSelected() /* pause */);
+                break;
             case R.id.overflowButton:
-                // TODO: Implement these button behaviors.
+                // TODO: Implement.
+                break;
+            case R.id.manageConferenceButton:
+                getPresenter().manageConferenceButtonClicked();
                 break;
             default:
                 Log.wtf(this, "onClick: unexpected");
@@ -282,6 +279,11 @@ public class CallButtonFragment
     }
 
     @Override
+    public void setSwitchCameraButton(boolean isBackFacingCamera) {
+        mSwitchCameraButton.setSelected(isBackFacingCamera);
+    }
+
+    @Override
     public void showAddCallButton(boolean show) {
         mAddCallButton.setVisibility(show ? View.VISIBLE : View.GONE);
     }
@@ -302,6 +304,11 @@ public class CallButtonFragment
     }
 
     @Override
+    public void setPauseVideoButton(boolean isPaused) {
+        mPauseVideoButton.setSelected(isPaused);
+    }
+
+    @Override
     public void showOverflowButton(boolean show) {
         mOverflowButton.setVisibility(show ? View.VISIBLE : View.GONE);
     }
diff --git a/InCallUI/src/com/android/incallui/CallButtonPresenter.java b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
index 4f457b8c2..6e841a1cc 100644
--- a/InCallUI/src/com/android/incallui/CallButtonPresenter.java
+++ b/InCallUI/src/com/android/incallui/CallButtonPresenter.java
@@ -16,7 +16,13 @@
 
 package com.android.incallui;
 
+import android.content.Context;
+import android.hardware.camera2.CameraAccessException;
+import android.hardware.camera2.CameraCharacteristics;
+import android.hardware.camera2.CameraManager;
 import android.telecomm.CallCapabilities;
+import android.telecomm.RemoteCallVideoProvider;
+import android.telecomm.VideoCallProfile;
 
 import com.android.contacts.common.util.PhoneNumberHelper;
 import com.android.contacts.common.util.TelephonyManagerUtils;
@@ -37,15 +43,20 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
     private Call mCall;
     private boolean mAutomaticallyMuted = false;
     private boolean mPreviousMuteState = false;
-
     private boolean mShowGenericMerge = false;
     private boolean mShowManageConference = false;
+    private boolean mUseFrontFacingCamera = true;
 
     private InCallState mPreviousState = null;
+    private CameraManager mCameraManager;
 
     public CallButtonPresenter() {
     }
 
+    public void initializeCameraManager(Context context) {
+        mCameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
+    }
+
     @Override
     public void onUiReady(CallButtonUi ui) {
         super.onUiReady(ui);
@@ -201,6 +212,17 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         TelecommAdapter.getInstance().addCall();
     }
 
+    public void changeToVoiceClicked() {
+        RemoteCallVideoProvider callVideoProvider = mCall.getCallVideoProvider();
+        if (callVideoProvider == null) {
+            return;
+        }
+
+        VideoCallProfile videoCallProfile = new VideoCallProfile(
+                VideoCallProfile.VIDEO_STATE_AUDIO_ONLY, VideoCallProfile.QUALITY_DEFAULT);
+        callVideoProvider.sendSessionModifyRequest(videoCallProfile);
+    }
+
     public void swapClicked() {
         TelecommAdapter.getInstance().swap(mCall.getId());
     }
@@ -211,6 +233,62 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         updateExtraButtonRow();
     }
 
+    public void changeToVideoClicked() {
+        RemoteCallVideoProvider callVideoProvider = mCall.getCallVideoProvider();
+        if (callVideoProvider == null) {
+            return;
+        }
+
+        VideoCallProfile videoCallProfile =
+                new VideoCallProfile(VideoCallProfile.VIDEO_STATE_BIDIRECTIONAL);
+        callVideoProvider.sendSessionModifyRequest(videoCallProfile);
+    }
+
+    /**
+     * Switches the camera between the front-facing and back-facing camera.
+     * @param useFrontFacingCamera True if we should switch to using the front-facing camera, or
+     *     false if we should switch to using the back-facing camera.
+     */
+    public void switchCameraClicked(boolean useFrontFacingCamera) {
+        mUseFrontFacingCamera = useFrontFacingCamera;
+
+        RemoteCallVideoProvider callVideoProvider = mCall.getCallVideoProvider();
+        if (callVideoProvider == null) {
+            return;
+        }
+
+        String cameraId = getCameraId();
+        if (cameraId != null) {
+            callVideoProvider.setCamera(cameraId);
+        }
+        getUi().setSwitchCameraButton(!useFrontFacingCamera);
+    }
+
+    /**
+     * Stop or start client's video transmission.
+     * @param pause True if pausing the local user's video, or false if starting the local user's
+     *    video.
+     */
+    public void pauseVideoClicked(boolean pause) {
+        RemoteCallVideoProvider callVideoProvider = mCall.getCallVideoProvider();
+        if (callVideoProvider == null) {
+            return;
+        }
+
+        if (pause) {
+            callVideoProvider.setCamera(null);
+            VideoCallProfile videoCallProfile = new VideoCallProfile(
+                    mCall.getVideoState() | VideoCallProfile.VIDEO_STATE_PAUSED);
+            callVideoProvider.sendSessionModifyRequest(videoCallProfile);
+        } else {
+            callVideoProvider.setCamera(getCameraId());
+            VideoCallProfile videoCallProfile = new VideoCallProfile(
+                    mCall.getVideoState() & ~VideoCallProfile.VIDEO_STATE_PAUSED);
+            callVideoProvider.sendSessionModifyRequest(videoCallProfile);
+        }
+        getUi().setPauseVideoButton(pause);
+    }
+
     private void updateUi(InCallState state, Call call) {
         Log.d(this, "Updating call UI for call: ", call);
 
@@ -343,6 +421,39 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         }
     }
 
+    private String getCameraId() {
+        String[] cameraIds = {};
+        String cameraId = null;
+        int targetCharacteristic = mUseFrontFacingCamera
+                ? CameraCharacteristics.LENS_FACING_FRONT : CameraCharacteristics.LENS_FACING_BACK;
+
+        try {
+            cameraIds = mCameraManager.getCameraIdList();
+        } catch (CameraAccessException e) {
+            // Camera disabled by device policy.
+        }
+
+        for (int i = 0; i < cameraIds.length; i++) {
+            CameraCharacteristics c = null;
+            try {
+                c = mCameraManager.getCameraCharacteristics(cameraIds[i]);
+            } catch (IllegalArgumentException e) {
+                // Device Id is unknown.
+            } catch (CameraAccessException e) {
+                // Camera disabled by device policy.
+            }
+            if (c != null) {
+                int facingCharacteristic = c.get(CameraCharacteristics.LENS_FACING);
+                if (facingCharacteristic == targetCharacteristic) {
+                    cameraId = cameraIds[i];
+                    break;
+                }
+            }
+        }
+
+        return cameraId;
+    }
+
     public void refreshMuteState() {
         // Restore the previous mute state
         if (mAutomaticallyMuted &&
@@ -368,10 +479,12 @@ public class CallButtonPresenter extends Presenter<CallButtonPresenter.CallButto
         void showSwapButton(boolean show);
         void showChangeToVideoButton(boolean show);
         void showSwitchCameraButton(boolean show);
+        void setSwitchCameraButton(boolean isBackFacingCamera);
         void showAddCallButton(boolean show);
         void enableAddCall(boolean enabled);
         void showMergeButton(boolean show);
         void showPauseVideoButton(boolean show);
+        void setPauseVideoButton(boolean isPaused);
         void showOverflowButton(boolean show);
         void displayDialpad(boolean on, boolean animate);
         boolean isDialpadVisible();