import threading import wave from datetime import datetime, timedelta, date, timezone import time import sched import subprocess import os from multiprocessing.connection import Pipe from owrx.map import Map, LocatorLocation import re from owrx.config import PropertyManager from owrx.bands import Bandplan import logging logger = logging.getLogger(__name__) class WsjtChopper(threading.Thread): def __init__(self, source): self.source = source self.tmp_dir = PropertyManager.getSharedInstance()["temporary_directory"] (self.wavefilename, self.wavefile) = self.getWaveFile() self.switchingLock = threading.Lock() self.scheduler = sched.scheduler(time.time, time.sleep) self.fileQueue = [] (self.outputReader, self.outputWriter) = Pipe() self.doRun = True super().__init__() def getWaveFile(self): filename = "{tmp_dir}/openwebrx-wsjtchopper-{id}-{timestamp}.wav".format( tmp_dir=self.tmp_dir, id=id(self), timestamp=datetime.utcnow().strftime(self.fileTimestampFormat) ) wavefile = wave.open(filename, "wb") wavefile.setnchannels(1) wavefile.setsampwidth(2) wavefile.setframerate(12000) return (filename, wavefile) def getNextDecodingTime(self): t = datetime.now() zeroed = t.replace(minute=0, second=0, microsecond=0) delta = t - zeroed seconds = (int(delta.total_seconds() / self.interval) + 1) * self.interval t = zeroed + timedelta(seconds=seconds) logger.debug("scheduling: {0}".format(t)) return t.timestamp() def startScheduler(self): self._scheduleNextSwitch() threading.Thread(target=self.scheduler.run).start() def emptyScheduler(self): for event in self.scheduler.queue: self.scheduler.cancel(event) def _scheduleNextSwitch(self): self.scheduler.enterabs(self.getNextDecodingTime(), 1, self.switchFiles) def switchFiles(self): self.switchingLock.acquire() file = self.wavefile filename = self.wavefilename (self.wavefilename, self.wavefile) = self.getWaveFile() self.switchingLock.release() file.close() self.fileQueue.append(filename) self._scheduleNextSwitch() def decoder_commandline(self, file): """ must be overridden in child classes """ return [] def decode(self): def decode_and_unlink(file): decoder = subprocess.Popen(self.decoder_commandline(file), stdout=subprocess.PIPE, cwd=self.tmp_dir) while True: line = decoder.stdout.readline() if line is None or (isinstance(line, bytes) and len(line) == 0): break self.outputWriter.send(line) rc = decoder.wait() if rc != 0: logger.warning("decoder return code: %i", rc) os.unlink(file) if self.fileQueue: file = self.fileQueue.pop() logger.debug("processing file {0}".format(file)) threading.Thread(target=decode_and_unlink, args=[file]).start() def run(self) -> None: logger.debug("WSJT chopper starting up") self.startScheduler() while self.doRun: data = self.source.read(256) if data is None or (isinstance(data, bytes) and len(data) == 0): self.doRun = False else: self.switchingLock.acquire() self.wavefile.writeframes(data) self.switchingLock.release() self.decode() logger.debug("WSJT chopper shutting down") self.outputReader.close() self.outputWriter.close() self.emptyScheduler() try: os.unlink(self.wavefilename) except Exception: logger.exception("error removing undecoded file") def read(self): try: return self.outputReader.recv() except EOFError: return None class Ft8Chopper(WsjtChopper): def __init__(self, source): self.interval = 15 self.fileTimestampFormat = "%y%m%d_%H%M%S" super().__init__(source) def decoder_commandline(self, file): # TODO expose decoding quality parameters through config return ["jt9", "--ft8", "-d", "3", file] class WsprChopper(WsjtChopper): def __init__(self, source): self.interval = 120 self.fileTimestampFormat = "%y%m%d_%H%M" super().__init__(source) def decoder_commandline(self, file): # TODO expose decoding quality parameters through config return ["wsprd", "-d", file] class Jt65Chopper(WsjtChopper): def __init__(self, source): self.interval = 60 self.fileTimestampFormat = "%y%m%d_%H%M" super().__init__(source) def decoder_commandline(self, file): # TODO expose decoding quality parameters through config return ["jt9", "--jt65", "-d", "3", file] class Jt9Chopper(WsjtChopper): def __init__(self, source): self.interval = 60 self.fileTimestampFormat = "%y%m%d_%H%M" super().__init__(source) def decoder_commandline(self, file): # TODO expose decoding quality parameters through config return ["jt9", "--jt9", "-d", "3", file] class Ft4Chopper(WsjtChopper): def __init__(self, source): self.interval = 7.5 self.fileTimestampFormat = "%y%m%d_%H%M%S" super().__init__(source) def decoder_commandline(self, file): # TODO expose decoding quality parameters through config return ["jt9", "--ft4", "-d", "3", file] class WsjtParser(object): locator_pattern = re.compile(".*\\s([A-Z0-9]+)\\s([A-R]{2}[0-9]{2})$") wspr_splitter_pattern = re.compile("([A-Z0-9]*)\\s([A-R]{2}[0-9]{2})\\s([0-9]+)") def __init__(self, handler): self.handler = handler self.dial_freq = None self.band = None modes = {"~": "FT8", "#": "JT65", "@": "JT9", "+": "FT4"} def parse(self, data): try: msg = data.decode().rstrip() # known debug messages we know to skip if msg.startswith(""): return if msg.startswith(" EOF on input file"): return modes = list(WsjtParser.modes.keys()) if msg[21] in modes or msg[19] in modes: out = self.parse_from_jt9(msg) else: out = self.parse_from_wsprd(msg) self.handler.write_wsjt_message(out) except ValueError: logger.exception("error while parsing wsjt message") def parse_timestamp(self, instring, dateformat): ts = datetime.strptime(instring, dateformat) return int(datetime.combine(date.today(), ts.time()).replace(tzinfo=timezone.utc).timestamp() * 1000) def parse_from_jt9(self, msg): # ft8 sample # '222100 -15 -0.0 508 ~ CQ EA7MJ IM66' # jt65 sample # '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: dateformat = "%H%M%S" timestamp = self.parse_timestamp(msg[0 : len(dateformat)], dateformat) msg = msg[len(dateformat) + 1 :] modeChar = msg[14:15] mode = WsjtParser.modes[modeChar] if modeChar in WsjtParser.modes else "unknown" wsjt_msg = msg[17:53].strip() self.parseLocator(wsjt_msg, mode) return { "timestamp": timestamp, "db": float(msg[0:3]), "dt": float(msg[4:8]), "freq": int(msg[9:13]), "mode": mode, "msg": wsjt_msg, } def parseLocator(self, msg, mode): m = WsjtParser.locator_pattern.match(msg) if m is None: return # 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 Map.getSharedInstance().updateLocation(m.group(1), LocatorLocation(m.group(2)), mode, self.band) def parse_from_wsprd(self, msg): # wspr sample # '2600 -24 0.4 0.001492 -1 G8AXA JO01 33' # '0052 -29 2.6 0.001486 0 G02CWT IO92 23' wsjt_msg = msg[29:].strip() self.parseWsprMessage(wsjt_msg) return { "timestamp": self.parse_timestamp(msg[0:4], "%H%M"), "db": float(msg[5:8]), "dt": float(msg[9:13]), "freq": float(msg[14:24]), "drift": int(msg[25:28]), "mode": "WSPR", "msg": wsjt_msg, } def parseWsprMessage(self, msg): m = WsjtParser.wspr_splitter_pattern.match(msg) if m is None: return Map.getSharedInstance().updateLocation(m.group(1), LocatorLocation(m.group(2)), "WSPR", self.band) def setDialFrequency(self, freq): self.dial_freq = freq self.band = Bandplan.getSharedInstance().findBand(freq)