I am working with the front camera in a Flutter app, and I noticed that on some Android devices, the preview appears mirrored, while on others, it looks correct. I need a reliable way to detect whether the front camera is mirroring.

What I have tried:

1. Checking sensorOrientation in CameraController.description: I assumed that devices with a sensorOrientation of 90 or 270 would mirror the front camera, but this method is unreliable.

bool isFrontCameraMirrored() {
  if (_cameraController?.description.lensDirection == CameraLensDirection.front) {
    int sensorOrientation = _cameraController?.description.sensorOrientation ?? 0;
    
    // Devices with sensor orientation 90 or 270 are likely to mirror the front camera.
    return sensorOrientation == 90 || sensorOrientation == 270;
  }
  return false;
}

Issue: This does not work because I have two different devices with a sensorOrientation of 270—one is mirrored, and the other is not.

2. Taking a picture and checking pixel differences: I tried capturing an image and comparing pixels on the left and right sides to detect mirroring.

bool checkHorizontalMirroring(img.Image image) {
  int width = image.width;
  int height = image.height;

  var leftPixel = image.getPixel(10, height ~/ 2);
  var rightPixel = image.getPixel(width - 10, height ~/ 2);

  return leftPixel != rightPixel;
}

Issue: This method always returns true, even when the image is not mirrored.

How I want to use this detection result: Once I detect whether the camera is mirroring, I want to use _isMirroredHorizontally in my UI like this:

_isMirroredHorizontally
    ? Positioned.fill(
        child: Transform.flip(
          flipX: true,
          child: CameraPreview(_cameraController!),
        ),
      )
    : Transform.scale(
        scale: 1 / tempScale,
        child: Center(
          child: CameraPreview(_cameraController!),
        ),
      ),