Struct FrameParser 

pub struct FrameParser { /* private fields */ }

Frame parser. One per channel.

Implementations

impl FrameParser

pub fn new(channel_idx: u8, channel_freq_hz: f64) -> Self

Create a parser stamping the given channel index + freq onto every emitted message.

pub fn take_polarity_flip(&mut self) -> bool

Polarity-flip handshake. ChannelBank reads + clears this after each MskDemod::process round; if true, it calls MskDemod::toggle_polarity() to recover from 180° phase slip detected via the inverted-SYN preamble.

pub fn drain<F: FnMut(AcarsMessage)>(&mut self, on_message: F)

Drain decoded messages buffered by synchronous BitSink::put_bit → consume_byte runs. Production callers (ChannelBank::process) invoke this after each demod block. Tests use feed_bytes() instead.

pub fn feed_bytes<F: FnMut(AcarsMessage)>( &mut self, bytes: &[u8], on_message: F, )

Convenience: drive the parser with a sequence of fully- formed bytes — used by unit tests that bypass MSK demod and feed hand-crafted byte sequences directly. Also drains the resulting messages into on_message for test ergonomics.

Trait Implementations

impl BitSink for FrameParser

fn take_polarity_flip(&mut self) -> bool

Polled by MskDemod::process after each put_bit. Returning true tells the demodulator to toggle its internal polarity (acarsdec MskS ^= 2) immediately. ACARS uses this to recover from 180° phase slip detected via inverted-SYN preamble — the C does the toggle directly inside decodeAcars (called from putbit), which means the very next bit emerges from the demod with inverted polarity. Sinks that don’t track polarity (synthetic-test capturers, etc.) keep the default false. Default is non-breaking for existing test stubs.

fn put_bit(&mut self, value: f32)

One bit per call. value > 0.0 is a binary 1, <= 0.0 is a binary 0 (acarsdec convention — see msk.c::putbit).