Opt in to enable iOS device as AVCapture device

gistfile1.txt

    // Enable iOS device to show up as AVCapture devices
    // From WWDC video 2014 #508 at 5:34
    // https://developer.apple.com/videos/wwdc/2014/#508
    CMIOObjectPropertyAddress prop = {
        kCMIOHardwarePropertyAllowScreenCaptureDevices,
        kCMIOObjectPropertyScopeGlobal,
        kCMIOObjectPropertyElementMaster };
    UInt32 allow = 1;
    CMIOObjectSetPropertyData(kCMIOObjectSystemObject, &prop, 0, NULL, sizeof(allow), &allow);