Port an Android Java OpenCV app to iOS in C++

The existing Android app that uses the back camera and sends frames to a function with OpenCV logic needs to be ported on iOS (using C++)

The only part that needs to be ported is the main function that deals with the frames with OpenCV. All the logic and functionality will stay the same. Calling conventions of Java OpenCV and C++ OpenCV is pretty similar with minimal changes.

The resulting iOS app will just send video frames from back camera to the existing OpenCV function and display the frame that's returned.