fn get_buffer_size()

in src/backend/mod.rs [1434:1459]

• 26 lines of code
• 2 McCabe index (conditional complexity)

fn get_buffer_size(unit: AudioUnit, devtype: DeviceType) -> std::result::Result<u32, OSStatus> {
    assert!(!unit.is_null());
    let (scope, element) = match devtype {
        DeviceType::INPUT => (kAudioUnitScope_Output, AU_IN_BUS),
        DeviceType::OUTPUT => (kAudioUnitScope_Input, AU_OUT_BUS),
        _ => panic!(
            "Get buffer size of AudioUnit {:?} with unsupported type: {:?}",
            unit, devtype
        ),
    };
    let mut frames: u32 = 0;
    let mut size = mem::size_of::<u32>();
    let status = audio_unit_get_property(
        unit,
        kAudioDevicePropertyBufferFrameSize,
        scope,
        element,
        &mut frames,
        &mut size,
    );
    if status == NO_ERR {
        Ok(frames)
    } else {
        Err(status)
    }
}