diff options
| -rw-r--r-- | ftnoir_filter_ewma2/ftnoir_filter_ewma2.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/ftnoir_filter_ewma2/ftnoir_filter_ewma2.cpp b/ftnoir_filter_ewma2/ftnoir_filter_ewma2.cpp index cdf18263..86cc2a96 100644 --- a/ftnoir_filter_ewma2/ftnoir_filter_ewma2.cpp +++ b/ftnoir_filter_ewma2/ftnoir_filter_ewma2.cpp @@ -63,6 +63,8 @@ void FTNoIR_Filter::filter(const double *input, double *output) last_noise[i] = noise_alpha*noise + (1.0-noise_alpha)*last_noise[i]; // Normalise the noise between 0->1 for 0->9 variances (0->3 stddevs). double norm_noise = std::min<double>(noise/(9.0*last_noise[i]), 1.0); + if (std::isnan(norm_noise)) + norm_noise = 0; // Calculate the smoothing 0.0->1.0 from the normalized noise. // TODO(abo): change kSmoothingScaleCurve to a float where 1.0 is sqrt(norm_noise). double smoothing = 1.0 - pow(norm_noise, s.kSmoothingScaleCurve/20.0); |