Function mic_worker

perro_source/audio_stack/perro_pawdio/src/mic.rs:626–656

(
    rx: std::sync::mpsc::Receiver<MicCommand>,
    samples: Arc<Mutex<Vec<i16>>>,
    stream_cursor: Arc<Mutex<usize>>,
    meta: Arc<Mutex<Option<(u32, u16)>>>,
    listening: Arc<std::sync::atomic

            default_taken |= is_default;
            MicDevice {
                name: input.name,
                label,
                is_default,
                sample_rate: input.sample_rate,
                channels: input.channels,
            }
        })
        .collect();
    Ok(devices)
}

/// One input device found on some cpal host, under its selection name.
#[cfg(not(target_arch = "wasm32"))]
struct EnumeratedInput {
    device: cpal::Device,
    name: String,
    is_default: bool,
    sample_rate: u32,
    channels: u16,
}

/// The default host plus every optional backend compiled in (ASIO via the
/// `mic-asio` feature, JACK via `mic-jack`). Without those features this is
/// exactly one host, so scan behavior matches the plain build.
#[cfg(not(target_arch = "wasm32"))]
fn input_hosts() -> Vec<(cpal::Host, bool)> {
    let default = cpal::default_host();
    let default_id = default.id();
    let mut hosts = vec![(default, true)];
    for id in cpal::available_hosts() {
        if id == default_id {
            continue;
        }
        if let Ok(host) = cpal::host_from_id(id) {