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Switch Morse startup to IQ-first and harden timeout handling

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Smittix
2026-02-26 13:44:04 +00:00
parent 146bca4b37
commit d3b737c19b
3 changed files with 55 additions and 25 deletions
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routes/morse.py
+14 -13
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@@ -354,8 +354,17 @@ def start_morse() -> Response:
can_try_direct_sampling = bool(sdr_device.sdr_type == SDRType.RTL_SDR and freq < 24.0)
if can_try_direct_sampling:
# Keep rtl_fm attempts first (cheap), then switch to IQ capture fallback.
# IQ-first strategy: avoid repeated rtl_fm/rtl_sdr handoffs that can
# leave the tuner in a bad state on some Linux builds.
command_attempts: list[dict[str, Any]] = [
{
'source': 'iq',
'direct_sampling_mode': 2,
},
{
'source': 'iq',
'direct_sampling_mode': None,
},
{
'source': 'rtl_fm',
'use_direct_sampling': True,
@@ -370,17 +379,13 @@ def start_morse() -> Response:
'add_resample_rate': True,
'add_dc_fast': True,
},
{
'source': 'iq',
'direct_sampling_mode': 2,
},
]
else:
command_attempts = [
{
'source': 'iq',
'direct_sampling_mode': None,
},
]
else:
command_attempts = [
{
'source': 'rtl_fm',
'use_direct_sampling': False,
@@ -388,10 +393,6 @@ def start_morse() -> Response:
'add_resample_rate': True,
'add_dc_fast': True,
},
{
'source': 'iq',
'direct_sampling_mode': None,
},
]
rtl_process: subprocess.Popen | None = None
@@ -571,7 +572,7 @@ def start_morse() -> Response:
)
decoder_thread.start()
startup_deadline = time.monotonic() + 1.2
startup_deadline = time.monotonic() + (2.5 if source == 'iq' else 1.2)
startup_ok = False
startup_error = ''