fix some video rotation checks

app/src/main/kotlin/com/simplemobiletools/camera/Preview.kt

@@ -535,7 +535,7 @@ class Preview : ViewGroup, SurfaceHolder.Callback, MediaScannerConnection.OnScan
         }
         mRecorder!!.setPreviewDisplay(mSurfaceHolder.surface)
 
-        val rotation = mActivity.getMediaRotation(mCurrCameraId)
+        val rotation = getVideoRotation()
         mInitVideoRotation = rotation
         mRecorder!!.setOrientationHint(rotation)
 
@@ -565,10 +565,15 @@ class Preview : ViewGroup, SurfaceHolder.Callback, MediaScannerConnection.OnScan
         return mIsRecording
     }
 
+    private fun getVideoRotation(): Int {
+        val deviceRot = MainActivity.mOrientation.compensateDeviceRotation(mCurrCameraId)
+        val previewRot = mActivity.getPreviewRotation(mCurrCameraId)
+        return (deviceRot + previewRot) % 360
+    }
+
     private fun startRecording() {
-        if (mInitVideoRotation != mActivity.getFinalRotation(mCurrCameraId, MainActivity.mOrientation)) {
-            cleanupRecorder()
-            initRecorder()
+        if (mInitVideoRotation != getVideoRotation()) {
+
         }
 
         try {

app/src/main/kotlin/com/simplemobiletools/camera/extensions/activity.kt

@@ -19,20 +19,6 @@ fun Activity.getPreviewRotation(cameraId: Int): Int {
     return result % 360
 }
 
-fun Activity.getMediaRotation(cameraId: Int): Int {
-    val degrees = getDeviceRotationDegrees()
-    val info = getCameraInfo(cameraId)
-    return if (info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
-        (360 + info.orientation + degrees) % 360
-    } else
-        (360 + info.orientation - degrees) % 360
-}
-
-fun Activity.getFinalRotation(currCameraId: Int, deviceOrientation: Int): Int {
-    var rotation = getMediaRotation(currCameraId)
-    return rotation % 360
-}
-
 fun Activity.getDeviceRotationDegrees() = when (windowManager.defaultDisplay.rotation) {
     Surface.ROTATION_90 -> 90
     Surface.ROTATION_180 -> 180