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Fix -inf in gain to Db conversion

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This commit is contained in:
Robbert van der Helm 2022-03-21 19:17:41 +01:00
parent d83f55728a
commit b0ba815514
1 changed files with 2 additions and 1 deletions
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3
src/util.rs
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@ -6,6 +6,7 @@ pub mod window;
pub use stft::StftHelper; pub use stft::StftHelper;
pub const MINUS_INFINITY_DB: f32 = -100.0; pub const MINUS_INFINITY_DB: f32 = -100.0;
pub const MINUS_INFINITY_GAIN: f32 = 1e-5; // 10f32.powf(MINUS_INFINITY_DB / 20)
pub const NOTES: [&str; 12] = [ pub const NOTES: [&str; 12] = [
"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B", "C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B",
]; ];
@ -36,7 +37,7 @@ pub fn db_to_gain(dbs: f32) -> f32 {
/// Convert a voltage gain ratio to decibels. Gain ratios that aren't positive will be treated as /// Convert a voltage gain ratio to decibels. Gain ratios that aren't positive will be treated as
/// [`MINUS_INFINITY_DB`]. /// [`MINUS_INFINITY_DB`].
pub fn gain_to_db(gain: f32) -> f32 { pub fn gain_to_db(gain: f32) -> f32 {
if gain > 0.0 { if gain > MINUS_INFINITY_GAIN {
gain.log10() * 20.0 gain.log10() * 20.0
} else { } else {
MINUS_INFINITY_DB MINUS_INFINITY_DB