fn get_device_group_id()

in src/backend/mod.rs [1709:1746]

• 35 lines of code
• 1 McCabe index (conditional complexity)

fn get_device_group_id(
    id: AudioDeviceID,
    devtype: DeviceType,
) -> std::result::Result<CString, OSStatus> {
    debug_assert_running_serially();
    match get_device_transport_type(id, devtype) {
        Ok(kAudioDeviceTransportTypeBuiltIn) => {
            cubeb_log!(
                "The transport type is {:?}",
                convert_uint32_into_string(kAudioDeviceTransportTypeBuiltIn)
            );
            match get_custom_group_id(id, devtype) {
                Some(id) => return Ok(id),
                None => {
                    cubeb_log!("Getting model UID instead.");
                }
            };
        }
        Ok(trans_type) => {
            cubeb_log!(
                "The transport type is {:?}. Getting model UID instead.",
                convert_uint32_into_string(trans_type)
            );
        }
        Err(e) => {
            cubeb_log!(
                "Error: {} when getting transport type. Get model uid instead.",
                e
            );
        }
    }

    // Some devices (e.g. AirPods) might only set the model-uid in the global scope.
    // The query might fail if the scope is input-only or output-only.
    get_device_model_uid(id, devtype)
        .or_else(|_| get_device_model_uid(id, DeviceType::INPUT | DeviceType::OUTPUT))
        .map(|uid| uid.into_cstring())
}