AudioServicesGetPropertyInfo

objc2_audio_toolbox

Function AudioServicesGetPropertyInfo 

Source 
pub unsafe extern "C-unwind" fn AudioServicesGetPropertyInfo(
    in_property_id: AudioServicesPropertyID,
    in_specifier_size: u32,
    in_specifier: *const c_void,
    out_property_data_size: *mut u32,
    out_writable: *mut u8,
) -> i32
Available on crate feature AudioServices only.
Expand description

Get information about the size of an AudioServices property and whether it can be set.

Parameter inPropertyID: a AudioServicesPropertyID constant.

Parameter inSpecifierSize: The size of the specifier data.

Parameter inSpecifier: A specifier is a buffer of data used as an input argument to some of the properties.

Parameter outPropertyDataSize: The size in bytes of the current value of the property. In order to get the property value, you will need a buffer of this size.

Parameter outWritable: Will be set to 1 if writable, or 0 if read only.

Returns: returns kAudioServicesNoError if successful.

ยงSafety

  • in_specifier must be a valid pointer or null.
  • out_property_data_size must be a valid pointer or null.
  • out_writable must be a valid pointer or null.