Added video overlay when leaving Linphone while in video call

AndroidManifest.xml

@@ -43,6 +43,8 @@
     <uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS"/>
     <!-- Needed for in-app purchase -->
     <uses-permission android:name="com.android.vending.BILLING" />
+    <!-- Needed for overlay widget -->
+    <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW"/>
 
 	<supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true"/>
     

res/values/non_localizable_strings.xml

@@ -59,6 +59,7 @@
 
     <string name="pref_wifi_only_key">pref_wifi_only_key</string>
 
+    <string name="pref_overlay_key">pref_overlay_key</string>
     <string name="pref_video_use_front_camera_key">pref_video_use_front_camera_key</string>
     <string name="pref_video_codec_h263_key">pref_video_codec_h263_key</string>
     <string name="pref_video_codec_mpeg4_key">pref_video_codec_mpeg4_key</string>

res/values/strings.xml

@@ -252,6 +252,8 @@
 
 	<!-- Video settings -->
 	<string name="pref_video_title">Video</string>
+	<string name="pref_overlay">Video overlay</string>
+	<string name="pref_overlay_summary">Display call video in overlay when outside the application</string>
 	<string name="pref_video_use_front_camera_title">Use front camera</string>
 	<string name="pref_video_initiate_call_with_video_title">Initiate video calls</string>
 	<string name="pref_video_initiate_call_with_video">Always send video requests</string>

res/xml/preferences.xml

@@ -111,12 +111,17 @@
 				android:title="@string/pref_bandwidth_limit"
 				android:key="@string/pref_bandwidth_limit_key"
 				android:numeric="integer" />
+			
+			<CheckBoxPreference 
+			    android:title="@string/pref_overlay"
+				android:key="@string/pref_overlay_key"
+				android:summary="@string/pref_overlay_summary"/>
 
-				<PreferenceCategory
+			<PreferenceCategory
-					android:title="@string/pref_video_codecs_title"
+				android:title="@string/pref_video_codecs_title"
-					android:key="@string/pref_video_codecs_key"
+				android:key="@string/pref_video_codecs_key"
-				    android:dependency="@string/pref_video_enable_key"
+			    android:dependency="@string/pref_video_enable_key"
-					android:shouldDisableView="true"/>
+				android:shouldDisableView="true"/>
 
 		</PreferenceScreen>
 

src/org/linphone/CallActivity.java

@@ -30,7 +30,6 @@ import org.linphone.core.LinphoneCore;
 import org.linphone.core.LinphoneCoreException;
 import org.linphone.core.LinphoneCoreListenerBase;
 import org.linphone.core.LinphonePlayer;
-import org.linphone.core.Reason;
 import org.linphone.mediastream.Log;
 import org.linphone.mediastream.video.capture.hwconf.AndroidCameraConfiguration;
 import org.linphone.ui.Numpad;
@@ -38,6 +37,7 @@ import org.linphone.ui.Numpad;
 import android.Manifest;
 import android.app.Activity;
 import android.app.Dialog;
+import android.app.Fragment;
 import android.app.FragmentTransaction;
 import android.content.Context;
 import android.content.Intent;
@@ -56,7 +56,6 @@ import android.os.CountDownTimer;
 import android.os.Handler;
 import android.os.PowerManager;
 import android.os.SystemClock;
-import android.app.Fragment;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.view.Gravity;

src/org/linphone/CallVideoFragment.java

@@ -159,6 +159,9 @@ public class CallVideoFragment extends Fragment implements OnGestureListener, On
 	public void onResume() {		
 		super.onResume();
 		
+		if (LinphonePreferences.instance().isOverlayEnabled()) {
+			LinphoneService.instance().destroyOverlay();
+		}
 		if (androidVideoWindowImpl != null) {
 			synchronized (androidVideoWindowImpl) {
 				LinphoneManager.getLc().setVideoWindow(androidVideoWindowImpl);
@@ -180,6 +183,9 @@ public class CallVideoFragment extends Fragment implements OnGestureListener, On
 				LinphoneManager.getLc().setVideoWindow(null);
 			}
 		}
+		if (LinphonePreferences.instance().isOverlayEnabled()) {
+			LinphoneService.instance().createOverlay();
+		}
 		
 		super.onPause();
 	}

src/org/linphone/LinphoneActivity.java

@@ -67,6 +67,7 @@ import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.net.Uri;
 import android.os.Bundle;
+import android.provider.Settings;
 import android.support.v4.app.ActivityCompat;
 import android.support.v4.widget.DrawerLayout;
 import android.view.Gravity;
@@ -106,6 +107,7 @@ public class LinphoneActivity extends Activity implements OnClickListener, Conta
 	private static final int PERMISSIONS_REQUEST_RECORD_AUDIO_INCOMING_CALL = 203;
 	private static final int PERMISSIONS_REQUEST_EXTERNAL_FILE_STORAGE = 204;
 	private static final int PERMISSIONS_REQUEST_CAMERA = 205;
+	private static final int PERMISSIONS_REQUEST_OVERLAY = 206;
 
 	private static LinphoneActivity instance;
 
@@ -1108,6 +1110,10 @@ public class LinphoneActivity extends Activity implements OnClickListener, Conta
 			} else {
 				resetClassicMenuLayoutAndGoBackToCallIfStillRunning();
 			}
+		} else if (requestCode == PERMISSIONS_REQUEST_OVERLAY) {
+			if (Settings.canDrawOverlays(this)) {
+				LinphonePreferences.instance().enableOverlay(true);
+			}
 		} else {
 			super.onActivityResult(requestCode, resultCode, data);
 		}
@@ -1148,6 +1154,15 @@ public class LinphoneActivity extends Activity implements OnClickListener, Conta
 		}
 		return true;
 	}
+	
+	public boolean checkAndRequestOverlayPermission() {
+		if (!Settings.canDrawOverlays(this)) {
+			Intent intent = new Intent(Settings.ACTION_MANAGE_OVERLAY_PERMISSION, Uri.parse("package:" + getPackageName()));
+			startActivityForResult(intent, PERMISSIONS_REQUEST_OVERLAY);
+			return false;
+		}
+		return true;
+	}
 
 	public void checkAndRequestExternalStoragePermission() {
 		if (LinphonePreferences.instance().writeExternalStoragePermAsked()) {

src/org/linphone/LinphonePreferences.java

@@ -19,12 +19,12 @@ along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
-import java.util.ArrayList;
 import java.io.BufferedReader;
 import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.InputStreamReader;
+import java.util.ArrayList;
 
 import org.linphone.core.LinphoneAddress;
 import org.linphone.core.LinphoneAddress.TransportType;
@@ -1342,4 +1342,12 @@ public class LinphonePreferences {
 	public void setServiceNotificationVisibility(boolean enable) {
 		getConfig().setBool("app", "show_service_notification", enable);
 	}
+	
+	public boolean isOverlayEnabled() {
+		return getConfig().getBool("app", "display_overlay", false);
+	}
+	
+	public void enableOverlay(boolean enable) {
+		getConfig().setBool("app", "display_overlay", enable);
+	}
 }

src/org/linphone/LinphoneService.java

@@ -32,9 +32,9 @@ import org.linphone.core.LinphoneCoreException;
 import org.linphone.core.LinphoneCoreFactory;
 import org.linphone.core.LinphoneCoreListenerBase;
 import org.linphone.core.LinphoneProxyConfig;
-import org.linphone.core.LpConfig;
 import org.linphone.mediastream.Log;
 import org.linphone.mediastream.Version;
+import org.linphone.ui.LinphoneOverlay;
 
 import android.annotation.TargetApi;
 import android.app.Activity;
@@ -49,6 +49,7 @@ import android.content.pm.PackageInfo;
 import android.content.pm.PackageManager.NameNotFoundException;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.PixelFormat;
 import android.net.Uri;
 import android.os.Build;
 import android.os.Handler;
@@ -56,6 +57,8 @@ import android.os.IBinder;
 import android.os.SystemClock;
 import android.provider.ContactsContract;
 import android.provider.MediaStore;
+import android.view.Gravity;
+import android.view.WindowManager;
 
 /**
  * 
@@ -118,6 +121,8 @@ public final class LinphoneService extends Service {
 	private boolean mDisableRegistrationStatus;
 	private LinphoneCoreListenerBase mListener;
 	public static int notifcationsPriority = (Version.sdkAboveOrEqual(Version.API16_JELLY_BEAN_41) ? Notification.PRIORITY_MIN : 0);
+	private WindowManager mWindowManager;
+	private LinphoneOverlay mOverlay;
 
 	public int getMessageNotifCount() {
 		return mMsgNotifCount;
@@ -207,6 +212,10 @@ public final class LinphoneService extends Service {
 				if (state == LinphoneCall.State.IncomingReceived) {
 					onIncomingReceived();
 				}
+				
+				if (state == State.CallEnd || state == State.CallReleased || state == State.Error) {
+					destroyOverlay();
+				}
 
 				if (state == State.StreamsRunning) {
 					// Workaround bug current call seems to be updated after state changed to streams running
@@ -286,8 +295,30 @@ public final class LinphoneService extends Service {
 																							, SystemClock.elapsedRealtime()+600000
 																							, 600000
 																							, mkeepAlivePendingIntent);
-	}
 		
+		mWindowManager = (WindowManager) getSystemService(WINDOW_SERVICE);
+	}
+	
+	public void createOverlay() {
+		if (mOverlay != null) destroyOverlay();
+		
+		LinphoneCall call = LinphoneManager.getLc().getCurrentCall();
+		if (call == null || !call.getCurrentParamsCopy().getVideoEnabled()) return;
+		
+		mOverlay = new LinphoneOverlay(this);
+		WindowManager.LayoutParams params = mOverlay.getWindowManagerLayoutParams();
+		params.x = 0;
+		params.y = 0;
+		mWindowManager.addView(mOverlay, params);
+	}
+	
+	public void destroyOverlay() {
+		if (mOverlay != null) {
+			mWindowManager.removeView(mOverlay);
+			mOverlay.destroy();
+		}
+		mOverlay = null;
+	}
 
 	private enum IncallIconState {INCALL, PAUSE, VIDEO, IDLE}
 	private IncallIconState mCurrentIncallIconState = IncallIconState.IDLE;
@@ -586,6 +617,7 @@ public final class LinphoneService extends Service {
 
 	@Override
 	public synchronized void onDestroy() {
+		destroyOverlay();
 		LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
 		if (lc != null) {
 			lc.removeListener(mListener);

src/org/linphone/SettingsFragment.java

@@ -39,6 +39,7 @@ import org.linphone.ui.LedPreference;
 import org.linphone.ui.PreferencesListFragment;
 import android.content.Intent;
 
+import android.net.Uri;
 import android.os.Bundle;
 import android.os.Handler;
 import android.preference.CheckBoxPreference;
@@ -49,6 +50,7 @@ import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceCategory;
 import android.preference.PreferenceScreen;
+import android.provider.Settings;
 
 /**
  * @author Sylvain Berfini
@@ -609,6 +611,7 @@ public class SettingsFragment extends PreferencesListFragment {
 		((CheckBoxPreference) findPreference(getString(R.string.pref_video_use_front_camera_key))).setChecked(mPrefs.useFrontCam());
 		((CheckBoxPreference) findPreference(getString(R.string.pref_video_initiate_call_with_video_key))).setChecked(mPrefs.shouldInitiateVideoCall());
 		((CheckBoxPreference) findPreference(getString(R.string.pref_video_automatically_accept_video_key))).setChecked(mPrefs.shouldAutomaticallyAcceptVideoRequests());
+		((CheckBoxPreference) findPreference(getString(R.string.pref_overlay_key))).setChecked(mPrefs.isOverlayEnabled());
 	}
 
 	private void updateVideoPreferencesAccordingToPreset() {
@@ -702,6 +705,21 @@ public class SettingsFragment extends PreferencesListFragment {
 				return true;
 			}
 		});
+		
+		findPreference(getString(R.string.pref_overlay_key)).setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
+			@Override
+			public boolean onPreferenceChange(Preference preference, Object newValue) {
+				boolean enable = (Boolean) newValue;
+				if (enable) {
+					if (LinphoneActivity.instance().checkAndRequestOverlayPermission()) {
+						mPrefs.enableOverlay(true);
+					}
+				} else {
+					mPrefs.enableOverlay(false);
+				}
+				return true;
+			}
+		});
 	}
 
 	private void initCallSettings() {

src/org/linphone/ui/LinphoneOverlay.java

@@ -0,0 +1,115 @@
+package org.linphone.ui;
+
+import org.linphone.LinphoneManager;
+import org.linphone.core.LinphoneCall;
+import org.linphone.core.LinphoneCallParams;
+import org.linphone.mediastream.video.AndroidVideoWindowImpl;
+
+import android.content.Context;
+import android.graphics.PixelFormat;
+import android.util.AttributeSet;
+import android.util.DisplayMetrics;
+import android.view.Gravity;
+import android.view.MotionEvent;
+import android.view.SurfaceView;
+import android.view.View;
+import android.view.WindowManager;
+
+public class LinphoneOverlay extends org.linphone.mediastream.video.display.GL2JNIView {
+	private WindowManager wm;
+	private WindowManager.LayoutParams params;
+	private DisplayMetrics metrics;
+	private float x;
+	private float y;
+	private float touchX;
+	private float touchY;
+	private AndroidVideoWindowImpl androidVideoWindowImpl;
+
+	public LinphoneOverlay(Context context, AttributeSet attrs, int defStyle) {
+		super(context, attrs);
+		wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
+		params = new WindowManager.LayoutParams(
+			WindowManager.LayoutParams.WRAP_CONTENT,
+			WindowManager.LayoutParams.WRAP_CONTENT,
+			WindowManager.LayoutParams.TYPE_PHONE,
+			WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,
+			PixelFormat.TRANSLUCENT);
+		params.gravity = Gravity.TOP | Gravity.LEFT;
+		metrics = new DisplayMetrics();
+		wm.getDefaultDisplay().getMetrics(metrics);
+		
+		androidVideoWindowImpl = new AndroidVideoWindowImpl(this, null, new AndroidVideoWindowImpl.VideoWindowListener() {
+			public void onVideoRenderingSurfaceReady(AndroidVideoWindowImpl vw, SurfaceView surface) {
+				LinphoneManager.getLc().setVideoWindow(vw);
+			}
+
+			public void onVideoRenderingSurfaceDestroyed(AndroidVideoWindowImpl vw) {
+				
+			}
+
+			public void onVideoPreviewSurfaceReady(AndroidVideoWindowImpl vw, SurfaceView surface) {
+				LinphoneManager.getLc().setPreviewWindow(null);
+			}
+
+			public void onVideoPreviewSurfaceDestroyed(AndroidVideoWindowImpl vw) {
+			}
+		});
+		
+		LinphoneCall call = LinphoneManager.getLc().getCurrentCall();
+		LinphoneCallParams callParams = call.getCurrentParamsCopy();
+		params.width = callParams.getReceivedVideoSize().width;
+		params.height = callParams.getReceivedVideoSize().height;
+		LinphoneManager.getLc().setVideoWindow(androidVideoWindowImpl);
+		
+		setOnClickListener(new OnClickListener() {
+			@Override
+			public void onClick(View v) {
+				
+			}
+		});
+	}
+
+	public LinphoneOverlay(Context context, AttributeSet attrs) {
+		this(context, attrs, 0);
+	}
+
+	public LinphoneOverlay(Context context) {
+		this(context, null);
+	}
+	
+	public void destroy() {
+		androidVideoWindowImpl.release();
+	}
+
+	@Override
+	public boolean onTouchEvent(MotionEvent event) {
+		x = event.getRawX();
+		y = event.getRawY();
+		switch (event.getAction()) {
+		case MotionEvent.ACTION_DOWN:
+			touchX = event.getX();
+			touchY = event.getY();
+			break;
+		case MotionEvent.ACTION_MOVE:
+			updateViewPostion();
+			break;
+		case MotionEvent.ACTION_CANCEL:
+		case MotionEvent.ACTION_UP:
+			touchX = touchY = 0;
+			break;
+		default:
+			break;
+		}
+		return super.onTouchEvent(event);
+	}
+
+	private void updateViewPostion() {
+		params.x = Math.min(Math.max(0, (int) (x - touchX)), metrics.widthPixels - getMeasuredWidth());
+		params.y = Math.min(Math.max(0, (int) (y - touchY)), metrics.heightPixels - getMeasuredHeight());
+		wm.updateViewLayout(this, params);
+	}
+
+	public WindowManager.LayoutParams getWindowManagerLayoutParams() {
+		return params;
+	}
+}