Extract the detected face identity from the provided face metadata.
int camera_meta_get_face_id(const camera_metadata_t metadata,
uint32_t *id)
BlackBerry 10.2.0
The metadata supplied to the user-defined consumer function by camera_meta_iterate_metadata().
The returned identity associated with the face.
The identity is a number which uniquely identifies this face across successive frames.
CAMERA_EOK when the function successfully completes, CAMERA_ENODATA if the camera did not provide an identity value otherwise another camera_error_t value that provides the reason that the call failed.