kissfft

A mixed-radix Fast Fourier Transform library.

• Upstream: https://github.com/mborgerding/kissfft
• Version: commit febd4caeed32e33ad8b2e0bb5ea77542c40f18ec (v131.1.0)
• License: BSD-3-Clause (see COPYING)

Only the core FFT and real-FFT source files used by kaldi-native-fbank are included here (kiss_fft.c, kiss_fftr.c, and their headers).