Function AudioComponentCount 

pub unsafe extern "C-unwind" fn AudioComponentCount(
    in_desc: NonNull<AudioComponentDescription>,
) -> u32

Available on crate feature AudioComponent only.

Counts audio components.

Returns the number of AudioComponents that match the specified AudioComponentDescription.

Parameter inDesc: The type, subtype and manufacturer fields are used to specify the audio components to count A value of 0 (zero) for any of these fields is a wildcard, so will match any value for this field

Returns: a UInt32. 0 (zero) means no audio components were found that matched the search parameters.

Safety

in_desc must be a valid pointer.