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Add a biquad for low- and high-pass filters

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Robbert van der Helm
2022-03-09 13:24:57 +01:00
parent a08624209c
commit bda8ecfb23
3 changed files with 173 additions and 3 deletions
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4
plugins/examples/stft/src/lib.rs
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@@ -16,7 +16,7 @@ struct Stft {
/// A Hann window function, passed to the overlap-add helper.
window_function: Vec<f32>,
/// The FFT of a simple low pass FIR filter.
/// The FFT of a simple low-pass FIR filter.
lp_filter_kernel: Vec<c32>,
/// The algorithms for the FFT and IFFT operations.
@@ -47,7 +47,7 @@ impl Default for Stft {
let mut real_fft_scratch_buffer: AlignedVec<f32> = AlignedVec::new(WINDOW_SIZE);
let mut complex_fft_scratch_buffer: AlignedVec<c32> = AlignedVec::new(WINDOW_SIZE / 2 + 1);
// Build a super simple low pass filter from one of the built in window function
// Build a super simple low-pass filter from one of the built in window function
const FILTER_WINDOW_SIZE: usize = 33;
let filter_window = util::window::hann(FILTER_WINDOW_SIZE);
real_fft_scratch_buffer[0..FILTER_WINDOW_SIZE].copy_from_slice(&filter_window);