Struct AudioQueueParameterEvent

#[repr(C)]
pub struct AudioQueueParameterEvent {
    pub mID: AudioQueueParameterID,
    pub mValue: AudioQueueParameterValue,
}

Available on crate feature AudioQueue only.

Specifies a value for an audio queue parameter.

Two ways are available to supply an audio queue with parameters:

• Provide one or more parameters by calling the AudioQueueEnqueueBufferWithParameters function. In this case, the parameters are applied to the specified buffer when it is played.

• Assign a parameter value immediately to an audio queue by calling the AudioQueueSetParameter function.

Note that the AudioQueueGetParameter function always returns the actual value of the parameter.

In macOS v10.5, audio queues have one parameter available: kAudioQueueParam_Volume, which controls the queue’s playback volume.

The parameter.

The value of the specified parameter.

See also Apple’s documentation

Fields

mID: AudioQueueParameterID

mValue: AudioQueueParameterValue

Trait Implementations

impl Clone for AudioQueueParameterEvent

fn clone(&self) -> AudioQueueParameterEvent

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for AudioQueueParameterEvent

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

Formats the value using the given formatter.

impl Encode for AudioQueueParameterEvent

const ENCODING: Encoding

The Objective-C type-encoding for this type.

impl PartialEq for AudioQueueParameterEvent

fn eq(&self, other: &AudioQueueParameterEvent) -> 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 RefEncode for AudioQueueParameterEvent

const ENCODING_REF: Encoding

The Objective-C type-encoding for a reference of this type.

impl Copy for AudioQueueParameterEvent

impl StructuralPartialEq for AudioQueueParameterEvent