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Use buffered read path for Morse PCM stream stability

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Smittix
2026-02-26 11:44:59 +00:00
parent 806bc1397a
commit d9228fb05a
1 changed files with 24 additions and 49 deletions
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73
utils/morse.py
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@@ -744,7 +744,6 @@ def morse_decoder_thread(
CHUNK = 4096
SCOPE_INTERVAL = 0.10
WAITING_INTERVAL = 0.25
IDLE_SLEEP = 0.04
STALLED_AFTER_DATA_SECONDS = 1.5
cfg = dict(decoder_config or {})
@@ -773,14 +772,8 @@ def morse_decoder_thread(
try:
fd: int | None
non_blocking = False
try:
fd = rtl_stdout.fileno()
try:
os.set_blocking(fd, False)
non_blocking = True
except Exception:
non_blocking = False
except Exception:
fd = None
@@ -790,53 +783,35 @@ def morse_decoder_thread(
data = b''
if fd is not None:
if non_blocking:
try:
ready, _, _ = select.select([fd], [], [], 0.20)
except Exception:
break
if ready:
try:
data = os.read(fd, CHUNK)
except BlockingIOError:
data = None
# Use buffered stream read first for cross-platform stability.
if hasattr(rtl_stdout, 'read1'):
data = rtl_stdout.read1(CHUNK)
else:
data = os.read(fd, CHUNK)
except Exception:
break
if data is None:
now = time.monotonic()
should_emit_waiting = False
if last_pcm_at is None:
should_emit_waiting = True
elif (now - last_pcm_at) >= STALLED_AFTER_DATA_SECONDS:
should_emit_waiting = True
if should_emit_waiting and waiting_since is None:
waiting_since = now
now = time.monotonic()
if should_emit_waiting and now - last_waiting_emit >= WAITING_INTERVAL:
last_waiting_emit = now
_emit_waiting_scope(output_queue, waiting_since)
time.sleep(IDLE_SLEEP)
continue
else:
try:
ready, _, _ = select.select([fd], [], [], 0.20)
except Exception:
break
now = time.monotonic()
should_emit_waiting = False
if last_pcm_at is None:
should_emit_waiting = True
elif (now - last_pcm_at) >= STALLED_AFTER_DATA_SECONDS:
should_emit_waiting = True
if ready:
data = os.read(fd, CHUNK)
else:
now = time.monotonic()
should_emit_waiting = False
if last_pcm_at is None:
should_emit_waiting = True
elif (now - last_pcm_at) >= STALLED_AFTER_DATA_SECONDS:
should_emit_waiting = True
if should_emit_waiting and waiting_since is None:
waiting_since = now
now = time.monotonic()
if should_emit_waiting and now - last_waiting_emit >= WAITING_INTERVAL:
last_waiting_emit = now
_emit_waiting_scope(output_queue, waiting_since)
continue
if should_emit_waiting and waiting_since is None:
waiting_since = now
now = time.monotonic()
if should_emit_waiting and now - last_waiting_emit >= WAITING_INTERVAL:
last_waiting_emit = now
_emit_waiting_scope(output_queue, waiting_since)
continue
else:
# Fallback for test streams without fileno().
data = rtl_stdout.read(CHUNK)