Struct GainNode 

pub struct GainNode { /* private fields */ }

A node that adjusts the volume (gain) of the input signal.

Supports dynamic gain updates via ControlMessage::SetParameter.

Example

use rust_audio_api::nodes::{GainNode, NodeType};
use rust_audio_api::{AudioContext, NodeParameter};

let mut ctx = AudioContext::new().unwrap();

let mut gain_id = None;
let dest_id = ctx.build_graph(|builder| {
    let gain = builder.add_node(NodeType::Gain(GainNode::new(0.5)));
    gain_id = Some(gain);
    gain
});

// Dynamically change the gain to 1.0 (full volume)
ctx.control_sender().send(
    rust_audio_api::graph::ControlMessage::SetParameter(
        gain_id.unwrap(),
        NodeParameter::Gain(1.0)
    )
).unwrap();

Implementations

impl GainNode

pub fn new(gain: f32) -> Self

Creates a new GainNode with the specified gain factor.

Parameters

• gain: The multiplier for the audio signal (e.g., 1.0 for unity gain, 0.5 for half volume).

pub fn set_gain(&mut self, gain: f32)

Sets the gain factor for this node.

pub fn process(&mut self, input: Option<&AudioUnit>, output: &mut AudioUnit)

GainNode is a passive node; it requires input to function. It doesn’t manage a ringbuf; it simply applies gain to each incoming frame.