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Add an identity function for biquad coefficients

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This commit is contained in:
Robbert van der Helm 2022-02-15 17:13:49 +01:00
parent 7632b21a95
commit 8c30eccb27
1 changed files with 12 additions and 7 deletions
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19
plugins/diopser/src/filter.rs
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@ -41,13 +41,7 @@ impl Default for Biquad {
/// Before setting constants the filter should just act as an identity function.
fn default() -> Self {
Self {
coefficients: BiquadCoefficients {
b0: 1.0,
b1: 0.0,
b2: 0.0,
a1: 0.0,
a2: 0.00,
},
coefficients: BiquadCoefficients::identity(),
s1: 0.0,
s2: 0.0,
}
@ -67,6 +61,17 @@ impl Biquad {
}
impl BiquadCoefficients {
/// Filter coefficients that would cause the sound to be passed through as is.
pub fn identity() -> Self {
Self {
b0: 1.0,
b1: 0.0,
b2: 0.0,
a1: 0.0,
a2: 0.0,
}
}
/// Compute the coefficients for an all-pass filter.
///
/// Based on <http://shepazu.github.io/Audio-EQ-Cookbook/audio-eq-cookbook.html>.