Enum ObjectKind 

#[non_exhaustive]
pub enum ObjectKind {
    PlugIn,
    Box,
    Device,
    Stream,
    Control,
}

Which layer of the AudioServerPlugin object tree an id sits at.

The values mirror the kAudio*ClassID four-character codes from <CoreAudio/AudioHardwareBase.h>. The framework’s property dispatch reads this off an id to pick the property table that applies — global object properties, plug-in properties, device properties, and so on.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PlugIn

kAudioPlugInClassID ('aplg') — the plug-in object.

Box

kAudioBoxClassID ('abox') — a box: a container that groups devices, modelling a physical or virtual enclosure.

Device

kAudioDeviceClassID ('adev') — a device exposed to the system as an audio endpoint.

Stream

kAudioStreamClassID ('astr') — one direction of audio flow on a device.

Control

kAudioControlClassID ('actl') — a control (volume, mute, data source, …) attached to a device or stream.

Implementations

impl ObjectKind

pub const fn class_id(self) -> FourCharCode

The kAudio*ClassID four-character code for this kind.

pub const fn base_class_id(self) -> FourCharCode

The kAudio*ClassID of this kind’s base class, or None for the root of the hierarchy.

Core Audio’s kAudioObjectPropertyBaseClass walks this chain; every class but AudioObject itself ultimately bases on kAudioObjectClassID ('aobj').

Trait Implementations

impl Clone for ObjectKind

fn clone(&self) -> ObjectKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ObjectKind

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

Formats the value using the given formatter.

impl Hash for ObjectKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ObjectKind

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ObjectKind

impl Eq for ObjectKind

impl StructuralPartialEq for ObjectKind