openwebrx-clone/owrx/wsjt.py

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from datetime import datetime, timezone
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from owrx.map import Map, LocatorLocation
import re
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from owrx.metrics import Metrics, CounterMetric
from owrx.pskreporter import PskReporter
from owrx.parser import Parser
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from owrx.audio import AudioChopperProfile
from abc import ABC, abstractmethod
import logging
logger = logging.getLogger(__name__)
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class Ft8Profile(AudioChopperProfile):
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def getInterval(self):
return 15
def getFileTimestampFormat(self):
return "%y%m%d_%H%M%S"
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def decoder_commandline(self, file):
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return ["jt9", "--ft8", "-d", str(self.decoding_depth("ft8")), file]
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class WsprProfile(AudioChopperProfile):
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def getInterval(self):
return 120
def getFileTimestampFormat(self):
return "%y%m%d_%H%M"
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def decoder_commandline(self, file):
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cmd = ["wsprd"]
if self.decoding_depth("wspr") > 1:
cmd += ["-d"]
cmd += [file]
return cmd
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class Jt65Profile(AudioChopperProfile):
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def getInterval(self):
return 60
def getFileTimestampFormat(self):
return "%y%m%d_%H%M"
def decoder_commandline(self, file):
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return ["jt9", "--jt65", "-d", str(self.decoding_depth("jt65")), file]
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class Jt9Profile(AudioChopperProfile):
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def getInterval(self):
return 60
def getFileTimestampFormat(self):
return "%y%m%d_%H%M"
def decoder_commandline(self, file):
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return ["jt9", "--jt9", "-d", str(self.decoding_depth("jt9")), file]
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class Ft4Profile(AudioChopperProfile):
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def getInterval(self):
return 7.5
def getFileTimestampFormat(self):
return "%y%m%d_%H%M%S"
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def decoder_commandline(self, file):
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return ["jt9", "--ft4", "-d", str(self.decoding_depth("ft4")), file]
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class WsjtParser(Parser):
modes = {"~": "FT8", "#": "JT65", "@": "JT9", "+": "FT4"}
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def parse(self, messages):
for data in messages:
try:
freq, raw_msg = data
self.setDialFrequency(freq)
msg = raw_msg.decode().rstrip()
# known debug messages we know to skip
if msg.startswith("<DecodeFinished>"):
return
if msg.startswith(" EOF on input file"):
return
modes = list(WsjtParser.modes.keys())
if msg[21] in modes or msg[19] in modes:
decoder = Jt9Decoder()
else:
decoder = WsprDecoder()
out = decoder.parse(msg, freq)
if "mode" in out:
self.pushDecode(out["mode"])
if "callsign" in out and "locator" in out:
Map.getSharedInstance().updateLocation(
out["callsign"], LocatorLocation(out["locator"]), out["mode"], self.band
)
PskReporter.getSharedInstance().spot(out)
self.handler.write_wsjt_message(out)
except ValueError:
logger.exception("error while parsing wsjt message")
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def pushDecode(self, mode):
metrics = Metrics.getSharedInstance()
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band = "unknown"
if self.band is not None:
band = self.band.getName()
if band is None:
band = "unknown"
if mode is None:
mode = "unknown"
name = "wsjt.decodes.{band}.{mode}".format(band=band, mode=mode)
metric = metrics.getMetric(name)
if metric is None:
metric = CounterMetric()
metrics.addMetric(name, metric)
metric.inc()
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class Decoder(ABC):
def parse_timestamp(self, instring, dateformat):
ts = datetime.strptime(instring, dateformat)
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return int(
datetime.combine(datetime.utcnow().date(), ts.time()).replace(tzinfo=timezone.utc).timestamp() * 1000
)
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@abstractmethod
def parse(self, msg, dial_freq):
pass
class Jt9Decoder(Decoder):
locator_pattern = re.compile("[A-Z0-9]+\\s([A-Z0-9]+)\\s([A-R]{2}[0-9]{2})$")
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def parse(self, msg, dial_freq):
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# ft8 sample
# '222100 -15 -0.0 508 ~ CQ EA7MJ IM66'
# jt65 sample
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# '2352 -7 0.4 1801 # R0WAS R2ABM KO85'
# '0003 -4 0.4 1762 # CQ R2ABM KO85'
modes = list(WsjtParser.modes.keys())
if msg[19] in modes:
dateformat = "%H%M"
else:
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dateformat = "%H%M%S"
timestamp = self.parse_timestamp(msg[0 : len(dateformat)], dateformat)
msg = msg[len(dateformat) + 1 :]
modeChar = msg[14:15]
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mode = WsjtParser.modes[modeChar] if modeChar in WsjtParser.modes else "unknown"
wsjt_msg = msg[17:53].strip()
result = {
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"timestamp": timestamp,
"db": float(msg[0:3]),
"dt": float(msg[4:8]),
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"freq": dial_freq + int(msg[9:13]),
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"mode": mode,
"msg": wsjt_msg,
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}
result.update(self.parseMessage(wsjt_msg))
return result
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def parseMessage(self, msg):
m = Jt9Decoder.locator_pattern.match(msg)
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if m is None:
return {}
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# this is a valid locator in theory, but it's somewhere in the arctic ocean, near the north pole, so it's very
# likely this just means roger roger goodbye.
if m.group(2) == "RR73":
return {"callsign": m.group(1)}
return {"callsign": m.group(1), "locator": m.group(2)}
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class WsprDecoder(Decoder):
wspr_splitter_pattern = re.compile("([A-Z0-9]*)\\s([A-R]{2}[0-9]{2})\\s([0-9]+)")
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def parse(self, msg, dial_freq):
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# wspr sample
# '2600 -24 0.4 0.001492 -1 G8AXA JO01 33'
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# '0052 -29 2.6 0.001486 0 G02CWT IO92 23'
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wsjt_msg = msg[29:].strip()
result = {
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"timestamp": self.parse_timestamp(msg[0:4], "%H%M"),
"db": float(msg[5:8]),
"dt": float(msg[9:13]),
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"freq": dial_freq + int(float(msg[14:24]) * 1e6),
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"drift": int(msg[25:28]),
"mode": "WSPR",
"msg": wsjt_msg,
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}
result.update(self.parseMessage(wsjt_msg))
return result
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def parseMessage(self, msg):
m = WsprDecoder.wspr_splitter_pattern.match(msg)
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if m is None:
return {}
return {"callsign": m.group(1), "locator": m.group(2)}