HACKS: Maximize FOV

1) Use 4:3 video aspect ratio to prevent cropping to 16:9
2) Disable EIS
3) Zoom out

app/src/main/java/com/nextcloud/talk/activities/CallActivity.java

@@ -116,6 +116,7 @@
 import org.webrtc.DefaultVideoDecoderFactory;
 import org.webrtc.DefaultVideoEncoderFactory;
 import org.webrtc.EglBase;
+import org.webrtc.ExtCamera2Enumerator;
 import org.webrtc.IceCandidate;
 import org.webrtc.Logging;
 import org.webrtc.MediaConstraints;
@@ -257,6 +258,9 @@ public class CallActivity extends CallBaseActivity {
     private Handler callInfosHandler = new Handler();
     private Handler cameraSwitchHandler = new Handler();
 
+    private boolean disableEIS = true;
+    private boolean zoomOut = true;
+
     // push to talk
     private boolean isPushToTalkActive = false;
     private PulseAnimation pulseAnimation;
@@ -454,7 +458,9 @@ private void createCameraEnumerator() {
             Log.w(TAG, "Camera2Enumerator threw an error", t);
         }
 
-        if (camera2EnumeratorIsSupported) {
+        if (camera2EnumeratorIsSupported & (disableEIS || zoomOut)) {
+            cameraEnumerator = new ExtCamera2Enumerator(this, disableEIS, zoomOut);
+        } else if (camera2EnumeratorIsSupported) {
             cameraEnumerator = new Camera2Enumerator(this);
         } else {
             cameraEnumerator = new Camera1Enumerator(MagicWebRTCUtils.shouldEnableVideoHardwareAcceleration());
@@ -894,7 +900,6 @@ private VideoCapturer createCameraCapturer(CameraEnumerator enumerator) {
             }
         }
 
-
         // Front facing camera not found, try something else
         Logging.d(TAG, "Looking for other cameras.");
         for (String deviceName : deviceNames) {
@@ -1827,7 +1832,7 @@ public void onComplete() {
 
     private void startVideoCapture() {
         if (videoCapturer != null) {
-            videoCapturer.startCapture(1280, 720, 30);
+            videoCapturer.startCapture(1280, 960, 30);
         }
     }
 

app/src/main/java/org/webrtc/ExtCamera2Capturer.java

@@ -0,0 +1,42 @@
+package org.webrtc;
+
+import android.content.Context;
+import android.hardware.camera2.CameraManager;
+
+import org.jetbrains.annotations.Nullable;
+
+public class ExtCamera2Capturer extends Camera2Capturer {
+
+    @Nullable private final CameraManager cameraManager;
+    private final boolean disableEIS, zoomOut;
+
+    public ExtCamera2Capturer(Context context, String cameraName, CameraEventsHandler eventsHandler,
+                              boolean disableEIS, boolean zoomOut) {
+        super(context, cameraName, eventsHandler);
+        cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
+        this.disableEIS = disableEIS;
+        this.zoomOut = zoomOut;
+    }
+
+    @Override
+    protected void createCameraSession(CameraSession.CreateSessionCallback createSessionCallback,
+                                       CameraSession.Events events, Context applicationContext,
+                                       SurfaceTextureHelper surfaceTextureHelper, String cameraName, int width, int height,
+                                       int framerate) {
+
+        CameraSession.CreateSessionCallback myCallback = new CameraSession.CreateSessionCallback() {
+            @Override
+            public void onDone(CameraSession cameraSession) {
+                createSessionCallback.onDone(cameraSession);
+            }
+
+            @Override
+            public void onFailure(CameraSession.FailureType failureType, String s) {
+                createSessionCallback.onFailure(failureType, s);
+            }
+        };
+
+        ExtCamera2Session.create(myCallback, events, applicationContext, cameraManager,
+                                 surfaceTextureHelper, cameraName, width, height, framerate, disableEIS, zoomOut);
+    }
+}

app/src/main/java/org/webrtc/ExtCamera2Enumerator.java

@@ -0,0 +1,27 @@
+package org.webrtc;
+
+import android.content.Context;
+import android.hardware.camera2.CameraManager;
+
+import org.jetbrains.annotations.Nullable;
+
+public class ExtCamera2Enumerator extends Camera2Enumerator {
+
+    final Context context;
+    @Nullable final CameraManager cameraManager;
+    private final boolean disableEIS, zoomOut;
+
+    public ExtCamera2Enumerator(Context context, boolean disableEIS, boolean zoomOut) {
+        super(context);
+        this.context = context;
+        this.disableEIS = disableEIS;
+        this.zoomOut = zoomOut;
+        this.cameraManager = (CameraManager) context.getSystemService(Context.CAMERA_SERVICE);
+    }
+
+    @Override
+    public CameraVideoCapturer createCapturer(String deviceName,
+                                              CameraVideoCapturer.CameraEventsHandler eventsHandler) {
+        return new ExtCamera2Capturer(context, deviceName, eventsHandler, disableEIS, zoomOut);
+    }
+}