Prevent flipping of the front facing camera

Question

I\'m attempting to access the raw feed of android\'s front facing camera. By default, the front facing camera\'s preview is flipped horizontally so users can see themselves

Answer 1

The data from the front camera is as the camera the sees it, looking at you. The left side of its image is your right side. I think this is what you want already? When put onto a SurfaceView it is flipped so it acts as you say, but that's a separate cosmetic transformation.

At least, this is how every device I've seen works and I've looked hard at this to implement front camera support in Barcode Scanner / Barcode Scanner+.

Answer 2

If you want to use a front-facing camera for barcode scanning you can use TextureView and apply a transformation matrix to it. When the texture is updated you can read the image data and use that.

See https://github.com/hadders/camera-reverse

Specifically from MainActivity.java

mCamera.setDisplayOrientation(90);
Matrix matrix = new Matrix();
matrix.setScale(-1, 1);
matrix.postTranslate(width, 0);
mTextureView.setTransform(matrix);