Merge pull request #5 from Fredemus/feature/more-formatters
a few more formatters
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commit
71dba0fbed
1 changed files with 93 additions and 1 deletions
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@ -6,7 +6,6 @@ use std::sync::Arc;
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pub fn f32_rounded(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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pub fn f32_rounded(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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Arc::new(move |x| format!("{:.digits$}", x))
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Arc::new(move |x| format!("{:.digits$}", x))
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}
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}
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/// Format a `[0, 1]` number as a percentage. Does not include the percent sign, you should specify
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/// Format a `[0, 1]` number as a percentage. Does not include the percent sign, you should specify
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/// this as the parameter's unit.
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/// this as the parameter's unit.
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pub fn f32_percentage(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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pub fn f32_percentage(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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@ -25,6 +24,69 @@ pub fn from_f32_percentage() -> Arc<dyn Fn(&str) -> Option<f32> + Send + Sync> {
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})
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})
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}
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}
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/// Turn an `f32` value from linear to dBFS (reference value 1)
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pub fn f32_lin_to_db(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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Arc::new(move |x| format!("{:.digits$}", x.log10() * 20.0))
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}
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/// Parse a `dBFS` value to a linear value. Handles the dB unit for you. Used in
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/// conjunction with [`f32_lin_to_db`].
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pub fn from_f32_lin_to_db() -> Arc<dyn Fn(&str) -> Option<f32> + Send + Sync> {
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Arc::new(|string| {
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string
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.trim_end_matches(&[' ', 'd', 'B'])
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.parse()
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.ok()
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.map(|x: f32| 10f32.powf(x / 20.0))
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})
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}
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/// Turn an `f32` value `[-1, 1]` to a panning value `[100L, 100R]` Value of `0.0` becomes `"C"`
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pub fn f32_panning() -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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Arc::new(move |x| {
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if x == 0. {
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"C".to_string()
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} else if x > 0. {
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format!("{:.0}R", x * 100.)
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} else {
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format!("{:.0}L", x * -100.)
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}
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})
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}
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/// Parse a pan value to a linear value, range `[-1, 1]`. Used in
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/// conjunction with [`f32_panning`].
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pub fn from_f32_panning() -> Arc<dyn Fn(&str) -> Option<f32> + Send + Sync> {
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Arc::new(|string| {
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if string.contains('L') {
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string
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.trim_end_matches(&[' ', 'L'])
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.parse()
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.ok()
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.map(|x: f32| x / -100.)
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} else if string.contains('R') {
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string
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.trim_end_matches(&[' ', 'R'])
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.parse()
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.ok()
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.map(|x: f32| x / 100.)
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} else if string == "C" {
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Some(0.)
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} else {
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string.trim_end_matches(&[' ']).parse().ok().map(|x: f32| x)
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}
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})
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}
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/// Round an `f32` value and divide it by 1000 when it gets over 1000
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pub fn f32_hz_then_khz(digits: usize) -> Arc<dyn Fn(f32) -> String + Send + Sync> {
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Arc::new(move |x| {
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if x < 1000.0 {
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format!("{:.digits$}", x)
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} else {
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let digits = digits + 1;
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format!("{:.digits$}", x / 1000.0)
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}
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})
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}
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/// Format an order/power of two. Useful in conjunction with [`from_power_of_two()`] to limit
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/// Format an order/power of two. Useful in conjunction with [`from_power_of_two()`] to limit
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/// integer parameter ranges to be only powers of two.
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/// integer parameter ranges to be only powers of two.
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pub fn i32_power_of_two() -> Arc<dyn Fn(i32) -> String + Send + Sync> {
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pub fn i32_power_of_two() -> Arc<dyn Fn(i32) -> String + Send + Sync> {
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@ -36,3 +98,33 @@ pub fn i32_power_of_two() -> Arc<dyn Fn(i32) -> String + Send + Sync> {
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pub fn from_i32_power_of_two() -> Arc<dyn Fn(&str) -> Option<i32> + Send + Sync> {
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pub fn from_i32_power_of_two() -> Arc<dyn Fn(&str) -> Option<i32> + Send + Sync> {
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Arc::new(|string| string.parse().ok().map(|n: i32| (n as f32).log2() as i32))
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Arc::new(|string| string.parse().ok().map(|n: i32| (n as f32).log2() as i32))
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}
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}
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const NOTES: [&str; 12] = [
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"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B",
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];
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/// Turns an integer midi number (range 0-127 usually) into a note name, e.g. 69 -> A4
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pub fn i32_note_formatter() -> Arc<dyn Fn(i32) -> String + Send + Sync> {
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Arc::new(move |x| {
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let note = x as usize;
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let note_name = NOTES[note % 12].to_string();
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let octave = (note / 12) as i32 - 1;
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format!("{note_name}{octave}")
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})
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}
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/// parses a note name into a midi number (range 0-127 usually), e.g. A#4 -> 70
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pub fn from_i32_note_formatter() -> Arc<dyn Fn(&str) -> Option<i32> + Send + Sync> {
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Arc::new(|string| {
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// string is too short to be a note name
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if string.len() < 2 {
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return None;
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}
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let (note_name, octave) = if string.contains("#") {
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string.split_at(2)
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} else {
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string.split_at(1)
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};
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// using unwrap_or here, or else trying to parse "##" breaks it
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let note = NOTES.iter().position(|&r| r == note_name).unwrap_or(0) as i32;
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octave.parse().ok().map(|n: i32| (n + 1) * 12 + note)
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})
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}
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