Where is the pffft_nearest_transform_size and pffft_is_valid_size implementation?
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ET3D-ET3D commented
Note that I only looked at the code. I'm planning to use the original pffft and wanted to pick these functions from this version (without the extra baggage). I searched the code but couldn't find an implementation for these functions.
unevens commented
they are in pffft_priv_impl.h, line 87 and 96.