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Avoid printing -0.0 dB

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This commit is contained in:
Robbert van der Helm 2022-07-24 21:20:53 +02:00
parent 6ee7e8f4e3
commit 6a1395e99a
1 changed files with 7 additions and 1 deletions
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8
src/formatters.rs
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@ -63,7 +63,13 @@ pub fn s2v_compression_ratio() -> Arc<dyn Fn(&str) -> Option<f32> + Send + Sync>
/// Turn an `f32` value from voltage gain to decibels using the semantics described in
/// [`util::gain_to_db()]. You should use either `" dB"` or `" dBFS"` for the parameter's unit.
pub fn v2s_f32_gain_to_db(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
Arc::new(move |value| format!("{:.digits$}", util::gain_to_db(value)))
Arc::new(move |value| {
// Never print -0.0 since that just looks weird and confusing
let value_db = util::gain_to_db(value);
let value_db = if value_db.abs() < 1e-6 { 0.0 } else { value_db };
format!("{:.digits$}", value_db)
})
}
/// Parse a decibel value to a linear voltage gain ratio. Handles the `dB` or `dBFS` units for you.