A 32-bit value representing a handle used to identify an open instance of a logical camera unit on a device.
typedef int32_t camera_handle_t;
A handle to the camera is returned by functions such as the camera_open() function and is released by the camera_close() function. A handle, when available, is basically a file descriptor that the user can use, provided they have the proper permissions to access the camera. Various Camera library calls use the handle to interact with the camera.