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Redo rader

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This commit is contained in:
Albin Chaboissier
2025-09-23 19:35:49 +02:00
parent a300386f7f
commit 399d7852ac
10 changed files with 313 additions and 82 deletions
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7
src/fft/radix2.rs
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@ -26,10 +26,11 @@ impl DFT for Radix2FFT {
}
}
fn execute(&mut self) {
fn execute(&mut self, window: fn(f32) -> f32) {
// Reorder samples
for (i, x) in self.output_buffer.iter_mut().enumerate() {
*x = self.input_buffer[reverse_bits(i, self.size as u32)];
let k = reverse_bits(i, self.size as u32);
*x = self.input_buffer[k] * window(k as f32 / self.size as f32);
}
for step in 1..(self.size + 1) {
@ -40,7 +41,7 @@ impl DFT for Radix2FFT {
// Compute current polynomial at each unit root
let a = self.output_buffer[s + i];
let b = self.output_buffer[s + i + mid_point];
let angle = - 2. * PI * (i as f32) / (pol_length as f32);
let angle = -2. * PI * (i as f32) / (pol_length as f32);
let phasor = Complex32::cexp(angle);
self.output_buffer[i + s] = a + phasor * b;
self.output_buffer[i + s + mid_point] = a - phasor * b;