Struct Mixer 

pub struct Mixer { /* private fields */ }

Available on crate feature audio only.

Multi-track audio mixer.

Combines multiple named audio tracks into a single output with per-track volume control. Missing tracks are treated as silence.

Example

let mut mixer = Mixer::new(24000);
mixer.add_track("narration", 1.0);
mixer.add_track("music", 0.3);
mixer.push_frame("narration", narration_frame);
mixer.push_frame("music", music_frame);
let mixed = mixer.mix()?;

Implementations

impl Mixer

pub fn new(output_sample_rate: u32) -> Mixer

Create a new mixer with the given output sample rate.

pub fn add_track(&mut self, name: impl Into<String>, volume: f32)

Add a named track with the given volume (0.0–1.0).

pub fn set_volume(&mut self, name: &str, volume: f32)

Set the volume for a named track.

pub fn push_frame(&mut self, track: &str, frame: AudioFrame)

Push an audio frame to a named track.

pub fn mix(&mut self) -> Result<AudioFrame, AudioError>

Mix all tracks into a single output frame.

Tracks without buffered audio are treated as silence. All tracks are mixed at the output sample rate.

Trait Implementations

impl AudioProcessor for Mixer

fn process<'life0, 'life1, 'async_trait>( &'life0 self, frame: &'life1 AudioFrame, ) -> Pin<Box<dyn Future<Output = Result<AudioFrame, AudioError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, Mixer: 'async_trait,

Process a single audio frame, returning the transformed result.