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rtl_sdr_fm: fix Gardner timing interpolation cost and gating

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arancormonk
2025-09-04 10:01:17 -04:00
parent 046846337a
commit 48b032e47a
1 changed files with 3 additions and 0 deletions
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3
src/rtl_sdr_fm.cpp
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@@ -1797,7 +1797,10 @@ static inline void fll_update_error(struct demod_state *d)
static inline void gardner_timing_adjust(struct demod_state *d)
{
if (!d->ted_enabled || d->ted_sps <= 1) return;
/* Guard: run TED only when we're near symbol rate to keep CPU low.
Skip when samples-per-symbol is very high unless explicitly forced. */
int sps = d->ted_sps;
if (sps > 12 && !d->ted_force) return;
int mu = d->ted_mu_q20; /* Q20 */
int gain = d->ted_gain_q20; /* Q20 */
int16_t *x = d->lowpassed;