+ WindowType::KaiserBessel(alpha) => {
+ let dlen = if half { size as f32 } else { (size as f32) * 0.5 };
+ let alpha2 = ((alpha * consts::PI / dlen) * (alpha * consts::PI / dlen)) as f64;
+
+ let mut kb: Vec<f64> = Vec::with_capacity(size);
+ let mut sum = 0.0;
+ for n in 0..size {
+ let b = bessel_i0(((n * (size - n)) as f64) * alpha2);
+ sum += b;
+ kb.push(sum);
+ }
+ sum += 1.0;
+ for n in 0..size {
+ dst[n] = (kb[n] / sum).sqrt() as f32;
+ }