kAudioCodecPropertyAvailableInputChannelLayouts

objc2_audio_toolbox

Constant kAudioCodecPropertyAvailableInputChannelLayouts 

Source 
pub const kAudioCodecPropertyAvailableInputChannelLayouts: AudioCodecPropertyID = kAudioCodecPropertyAvailableInputChannelLayoutTags; // 1_634_296_684u32
Available on crate feature AudioCodec only.
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Apple’s documentation