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//! Emit-rate pacing override: what paces injected motion, and the rate in effect (§4.14).
/// What paces injected motion (`OPTION(EMIT)`).
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub enum EmitPace {
/// Pace to the mouse's learnt native report rate (the default).
#[default]
Learned,
/// Pace to the cloned mouse's `bInterval` poll rate.
Interval,
/// A fixed rate in Hz. The 1 ms frame clock snaps it to `1000/n` Hz and caps it at 1 kHz.
Fixed(u16),
}
/// The configured [`EmitPace`] plus the emit-rate ceiling actually in effect (§4.14).
#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Default)]
pub struct EmitPaceStatus {
/// The selected mode (for [`EmitPace::Fixed`], the rate the host requested).
pub mode: EmitPace,
/// The ceiling currently in effect (Hz); 0 = learnt/adaptive, or no device yet in [`EmitPace::Interval`].
pub resolved_hz: u16,
}
impl EmitPaceStatus {
/// Decode a `RESP(OPTIONS, EMIT)` payload (§4.14): `[what][id][mode][fixed_hz u16 LE][resolved_hz u16 LE]`.
pub(crate) fn from_payload(p: &[u8]) -> Option<EmitPaceStatus> {
if p.len() < 7 {
return None;
}
let fixed_hz = u16::from_le_bytes([p[3], p[4]]);
let resolved_hz = u16::from_le_bytes([p[5], p[6]]);
let mode = match p[2] {
0 => EmitPace::Learned,
1 => EmitPace::Interval,
2 => EmitPace::Fixed(fixed_hz),
_ => return None,
};
Some(EmitPaceStatus { mode, resolved_hz })
}
}