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[feat](trx-rds,trx-backend-soapysdr): condition weak-signal rds updates

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Co-authored-by: Codex <codex@openai.com>
Signed-off-by: Stan Grams <sjg@haxx.space>
This commit is contained in:
Stan Grams
2026-02-28 12:52:31 +01:00
parent e9fa27be3a
commit b172ace0ee
2 changed files with 35 additions and 4 deletions
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src/decoders/trx-rds/src/lib.rs
+6 -2
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@@ -14,6 +14,7 @@ const SEARCH_REG_MASK: u32 = (1 << 26) - 1;
const PHASE_CANDIDATES: usize = 8;
const BIPHASE_CLOCK_WINDOW: usize = 128;
const RDS_BASEBAND_LP_HZ: f32 = 3_000.0;
const MIN_PUBLISH_QUALITY: f32 = 0.45;
const OFFSET_A: u16 = 0x0FC;
const OFFSET_B: u16 = 0x198;
@@ -328,7 +329,7 @@ impl RdsDecoder {
}
pub fn process_sample(&mut self, sample: f32, quality: f32) -> Option<&RdsData> {
let _ = quality;
let publish_quality = quality.clamp(0.0, 1.0);
let (sin_p, cos_p) = self.carrier_phase.sin_cos();
self.carrier_phase = (self.carrier_phase + self.carrier_inc).rem_euclid(TAU);
let mixed_i = self.i_lp.process(sample * cos_p * 2.0);
@@ -338,7 +339,10 @@ impl RdsDecoder {
if let Some(update) = candidate.process_sample(mixed_i, mixed_q) {
if candidate.score >= self.best_score {
self.best_score = candidate.score;
self.best_state = Some(update);
let same_pi = self.best_state.as_ref().and_then(|state| state.pi) == update.pi;
if publish_quality >= MIN_PUBLISH_QUALITY || same_pi || self.best_state.is_none() {
self.best_state = Some(update);
}
}
}
}