Struct AudioEnv 

pub struct AudioEnv {
    pub device: AudioDevice,
    pub live: u32,
}

What the driver’s audio output is doing, for views to read. A fact, not a verb: nothing here lets a view close the device, which stays the driver’s decision (it closes an idle one itself, after a while).

Worth a row because an open output stream is a real-time thread that runs whether or not anything plays — ~94 buffer callbacks a second at the usual period — which is the whole of an idle app’s CPU once a session has held a sound. A view that shows device still Open ten seconds after its last click is showing a bug that otherwise only top can see. Headless drivers leave it at the default, which is the truth for them: no device, nothing playing.

Fields

device: AudioDevice

Whether the output device is open, and so costing something.

live: u32

Playbacks started and not yet ended, plus the ones waiting on the device to open. A play that waits counts from the frame it was asked until the open answers; if the device refuses, the play is refused on the next apply and leaves the count with it (F63).

Trait Implementations

impl Clone for AudioEnv

fn clone(&self) -> AudioEnv

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for AudioEnv

impl Debug for AudioEnv

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for AudioEnv

fn default() -> AudioEnv

Returns the “default value” for a type.

impl Eq for AudioEnv

impl PartialEq for AudioEnv

fn eq(&self, other: &AudioEnv) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for AudioEnv