Can anyone from apple provide the spline formulation that is used in the CIToneCurve filter?The documentation says that a spline is passed thru the points you give it, but thereare a lot of spline types in the world, and they all can yield different shapes thru the same set of points.

i pushed a couple of builds up to app store connect on dec5 and they just disappeared. not showing as in-process or anything. anyone else see this happening?

sometimes, for the very same video file, we get an error from this call on iOS example of fail case path: /var/mobile/Media/DCIM/102APPLE/IMG_2685.mp4 sometimes it works fine. what? [[NSFileManager defaultManager] attributesOfItemAtPath:filepath error:&error]; anyone see this before?