Struct Decoder 

pub struct Decoder { /* private fields */ }

Streaming CW decoder. See the module docs for usage.

Implementations

impl Decoder

pub const fn new() -> Self

Construct an empty decoder. const so it can be placed in a static without lazy initialisation.

pub fn on_transition(&mut self, now_us: u64, key_down: bool, wpm: u8)

Feed a key-line transition.

now_us is the absolute time of the edge — any monotonic clock works since only deltas are used. key_down is the new state of the line. wpm is the sender’s speed; thresholds derive from it.

O(1) work — safe to call from a high-priority context.

pub fn poll(&mut self, now_us: u64, wpm: u8)

Poll the decoder so pending characters and inter-word spaces get flushed during extended silence.

Call at a regular cadence (e.g. once per UI tick). Idempotent during a single sustained silence — repeated calls emit at most one character and one space.

O(1) work.

pub fn snapshot(&self, out: &mut [u8]) -> usize

Copy the recent decoded history (oldest-first ASCII bytes) into out. Returns the number of bytes written. Does not mutate.

pub fn len(&self) -> usize

Number of characters currently in the recent-history ring.

pub fn is_empty(&self) -> bool

True iff no characters have been decoded yet (or Decoder::clear was called).

pub fn clear(&mut self)

Drop the recent history and reset in-flight Morse state. The next pulse / gap is treated as the start of a fresh stream.

Trait Implementations

impl Default for Decoder

fn default() -> Self

Returns the “default value” for a type.