I was thinking about it...I don't see any reason why it couldn't work, but I don't know if the interpolation will work as well in something like 4:2:0. I might have to adjust it or maybe it will work right off the bat--but, I imagine most things scaled with these filters will at least be captured in RGB24/32 to begin with, so it's low priority.
First I want to try and understand how the SaI family of resizers is supposed to work
without accessing invalid memory
...