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Add a .previous_value() method to the smoothers

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Robbert van der Helm 2022-04-27 17:43:40 +02:00
parent 6185909ddf
commit b89b4dfbb2
1 changed files with 17 additions and 1 deletions
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18
src/param/smoothing.rs
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@ -179,6 +179,14 @@ impl Smoother<f32> {
self.next_step(1) self.next_step(1)
} }
/// Get previous value returned by this smoother. This may be useful to save some boilerplate
/// when [`is_smoothing()`][Self::is_smoothing()] is used to determine whether an expensive
/// calculation should take place, and [`next()`][Self::next()] gets called as part of that
/// calculation.
pub fn previous_value(&self) -> f32 {
self.current.load(Ordering::Relaxed)
}
/// Produce smoothed values for an entire block of audio. Used in conjunction with /// Produce smoothed values for an entire block of audio. Used in conjunction with
/// [`Buffer::iter_blocks()`][crate::prelude::Buffer::iter_blocks()]. Make sure to call /// [`Buffer::iter_blocks()`][crate::prelude::Buffer::iter_blocks()]. Make sure to call
/// [`Plugin::initialize_block_smoothers()`][crate::prelude::Plugin::initialize_block_smoothers()] with /// [`Plugin::initialize_block_smoothers()`][crate::prelude::Plugin::initialize_block_smoothers()] with
@ -283,13 +291,21 @@ impl Smoother<i32> {
} }
/// Get the next value from this smoother. The value will be equal to the previous value once /// Get the next value from this smoother. The value will be equal to the previous value once
// the smoothing period is over. This should be called exactly once per sample. /// the smoothing period is over. This should be called exactly once per sample.
// Yes, Clippy, like I said, this was intentional // Yes, Clippy, like I said, this was intentional
#[allow(clippy::should_implement_trait)] #[allow(clippy::should_implement_trait)]
pub fn next(&self) -> i32 { pub fn next(&self) -> i32 {
self.next_step(1) self.next_step(1)
} }
/// Get previous value returned by this smoother. This may be useful to save some boilerplate
/// when [`is_smoothing()`][Self::is_smoothing()] is used to determine whether an expensive
/// calculation should take place, and [`next()`][Self::next()] gets called as part of that
/// calculation.
pub fn previous_value(&self) -> i32 {
self.current.load(Ordering::Relaxed).round() as i32
}
/// Produce smoothed values for an entire block of audio. Used in conjunction with /// Produce smoothed values for an entire block of audio. Used in conjunction with
/// [`Buffer::iter_blocks()`][crate::prelude::Buffer::iter_blocks()]. Make sure to call /// [`Buffer::iter_blocks()`][crate::prelude::Buffer::iter_blocks()]. Make sure to call
/// [`Plugin::initialize_block_smoothers()`][crate::prelude::Plugin::initialize_block_smoothers()] with /// [`Plugin::initialize_block_smoothers()`][crate::prelude::Plugin::initialize_block_smoothers()] with