fn get_channel_count()

in src/backend/mod.rs [1622:1643]

• 21 lines of code
• 4 McCabe index (conditional complexity)

fn get_channel_count(
    devid: AudioObjectID,
    devtype: DeviceType,
) -> std::result::Result<u32, OSStatus> {
    assert_ne!(devid, kAudioObjectUnknown);
    debug_assert_running_serially();

    let devstreams = get_device_streams(devid, devtype)?;
    let mut count: u32 = 0;
    for ds in devstreams {
        if devtype == DeviceType::INPUT
            && CoreStreamData::should_force_vpio_for_input_device(ds.device)
        {
            count += 1;
        } else {
            count += get_stream_virtual_format(ds.stream)
                .map(|f| f.mChannelsPerFrame)
                .unwrap_or(0);
        }
    }
    Ok(count)
}