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fix: flush shared audio queue on VFO frequency change

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The shared audio queue (maxsize reduced from 80 to 20) was not flushed
when the monitor frequency changed — only when the monitor was disabled.
This caused up to 4 seconds of stale old-frequency audio to play after
clicking to tune, making click-to-tune appear non-functional.

Now flushes the queue whenever the VFO frequency changes, so audio at
the new frequency begins within ~50ms (one FFT frame).
This commit is contained in:
Smittix
2026-02-23 22:42:41 +00:00
parent 889c08691f
commit a5452fa1b1
1 changed files with 6 additions and 2 deletions
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8
routes/waterfall_websocket.py
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@@ -34,7 +34,7 @@ logger = get_logger('intercept.waterfall_ws')
AUDIO_SAMPLE_RATE = 48000
_shared_state_lock = threading.Lock()
_shared_audio_queue: queue.Queue[bytes] = queue.Queue(maxsize=80)
_shared_audio_queue: queue.Queue[bytes] = queue.Queue(maxsize=20)
_shared_state: dict[str, Any] = {
'running': False,
'device': None,
@@ -117,16 +117,20 @@ def _set_shared_monitor(
squelch: int | None = None,
) -> None:
was_enabled = False
freq_changed = False
with _shared_state_lock:
was_enabled = bool(_shared_state.get('monitor_enabled'))
_shared_state['monitor_enabled'] = bool(enabled)
if frequency_mhz is not None:
old_freq = float(_shared_state.get('monitor_freq_mhz', 0.0) or 0.0)
_shared_state['monitor_freq_mhz'] = float(frequency_mhz)
if abs(float(frequency_mhz) - old_freq) > 1e-6:
freq_changed = True
if modulation is not None:
_shared_state['monitor_modulation'] = str(modulation).lower().strip()
if squelch is not None:
_shared_state['monitor_squelch'] = max(0, min(100, int(squelch)))
if was_enabled and not enabled:
if (was_enabled and not enabled) or (enabled and freq_changed):
_clear_shared_audio_queue()