set up a CHECK_IPP macro, so I can get rid of my ad-hoc printfs for error checking
using macro for CHECK_IPP all over now
works
removed unused code
implementing downsampling size calculation
aha, need to cast to 'interval' float when calculating sc
ok, downsample factors make sense now
yeah, if we do up to interval=10, we get down to 0.5
9.2ms to sample 20 img size in IPPs. no OpenMP yet.
we add about 1ms by actually catching return values. so, like 10-11ms now, without openmp. nbd.
passing results all the way back to main now (might add a function to write all pyra levels to file)
iteratively downsampling doesn't seem to help compared to just starting from 640x480 every time.