Struct GainRamp 

pub struct GainRamp { /* private fields */ }

Linear gain ramp for smooth transitions between tracks. Caches the current gain and per-sample delta so accessors stay cheap.

Use cases:

• Track-to-track gain changes
• Mute/unmute transitions
• Bypass switching

Implementations

impl GainRamp

pub fn new(from: f64, to: f64, sample_rate: u32, ramp_ms: u32) -> Self

Create a new gain ramp

Arguments

• from - Starting gain (linear)
• to - Target gain (linear)
• sample_rate - Sample rate in Hz
• ramp_ms - Ramp duration in milliseconds

pub fn fade_in(target: f64, sample_rate: u32, ramp_ms: u32) -> Self

Create a ramp from 0 to target (fade in)

pub fn fade_out(from: f64, sample_rate: u32, ramp_ms: u32) -> Self

Create a ramp from current to 0 (fade out)

pub fn next_gain(&mut self) -> f64

Get the next gain value (call once per sample) Uses a cached per-sample delta and snaps to the target at ramp end.

pub fn apply(&mut self, samples: &mut [f64])

Apply gain ramp to a buffer (more efficient than per-sample calls)

pub fn is_done(&self) -> bool

Check if ramp is complete

pub fn remaining_samples(&self) -> usize

Get remaining samples

pub fn current(&self) -> f64

Get current gain

pub fn target(&self) -> f64

Get target gain

pub fn retarget(&mut self, new_target: f64, sample_rate: u32, ramp_ms: u32)

Set a new target, starting from current position

pub fn jump(&mut self, target: f64)

Jump immediately to target (no ramp)