in cubeb-sys/src/device.rs [96:104]
fn fmt_device_type(t: &cubeb_device_type) -> &'static str {
match *t {
CUBEB_DEVICE_TYPE_UNKNOWN => "Unknown",
CUBEB_DEVICE_TYPE_INPUT => "Input",
CUBEB_DEVICE_TYPE_OUTPUT => "Output",
t if t == CUBEB_DEVICE_TYPE_INPUT | CUBEB_DEVICE_TYPE_OUTPUT => "Input+Output",
_ => "Unexpected",
}
}