tree b4ba5e72aa49282074562bdc11d61106dae0a668
parent 4a53766c841c03647211e02519a1dbaf94239a75
author Alessio Bazzica <alessiob@webrtc.org> 1554887469 +0200
committer Commit Bot <commit-bot@chromium.org> 1554890094 +0000

RNN VAD: Switch to PFFFT

This CL replaces KissFFT with PFFFT for the spectral features
computation.

Remarks:
- Extra FFT output vector copy eliminated
- Scaling and windowing merged into a single vector for efficiency
- Nyquist frequency hack to keep the iteration in
  BandFeaturesExtractor::ComputeSpectralCrossCorrelation simple

Bug: webrtc:9577, webrtc:10480
Change-Id: I436563bd257f66a243f5402be270ffcf859bd184
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/130221
Commit-Queue: Alessio Bazzica <alessiob@webrtc.org>
Reviewed-by: Per Åhgren <peah@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27536}