fftw3 is extremely fast and vectorized well. Why write your own FFT implementati...

keurrr · on Sept 25, 2020

I can't link with fftw3 since it's GPL. The other libraries that were permissive licensed had confusing APIs and the output binaries were almost as large as my entire project. CPU usage is high but because of one poorly designed part of the GUI (eqhover.cpp)

vortico · on Sept 25, 2020

Surely there's one in here that would be acceptable. https://community.vcvrack.com/t/complete-list-of-c-c-fft-lib...

mrguyorama · on Sept 25, 2020

I'm not sure I understand, why can't you use GPL code?

keurrr · on Sept 25, 2020

I can’t statically link with it because I would need to release my own software under the GPL.

vortico · on Sept 26, 2020

Why not license your software under the GPL? For end-user applications like these, there's no reason software shouldn't be GPL, and if fact it would be better for you since it prevents companies from exploiting your work that you intended to serve the greater good for purposes of their own profit.

Const-me · on Sept 28, 2020

> Why not license your software under the GPL?

If OP did that, I probably wouldn’t bother to improve their code: https://github.com/Const-me/prettyeq/tree/master

While my primary motivation was “for lulz”, possibility to reuse the code whenever I need a fast 1D FFT also contributed.