refactor parsers; introduce new pocsag parser

owrx/aprs.py

@@ -2,6 +2,7 @@ from owrx.kiss import KissDeframer
 from owrx.map import Map, LatLngLocation
 from owrx.bands import Bandplan
 from owrx.metrics import Metrics, CounterMetric
+from owrx.parser import Parser
 from datetime import datetime, timezone
 import re
 import logging
@@ -148,18 +149,15 @@ class AprsLocation(LatLngLocation):
         return res
 
 
-class AprsParser(object):
+class AprsParser(Parser):
     def __init__(self, handler):
+        super().__init__(handler)
         self.ax25parser = Ax25Parser()
         self.deframer = KissDeframer()
-        self.dial_freq = None
-        self.band = None
-        self.handler = handler
         self.metric = self.getMetric()
 
     def setDialFrequency(self, freq):
-        self.dial_freq = freq
-        self.band = Bandplan.getSharedInstance().findBand(freq)
+        super().setDialFrequency(freq)
         self.metric = self.getMetric()
 
     def getMetric(self):

owrx/dsp.py

@@ -2,6 +2,7 @@ from owrx.config import PropertyManager
 from owrx.meta import MetaParser
 from owrx.wsjt import WsjtParser
 from owrx.aprs import AprsParser
+from owrx.pocsag import PocsagParser
 from owrx.source import SdrSource
 from csdr import csdr
 import threading
@@ -15,9 +16,12 @@ class DspManager(csdr.output):
     def __init__(self, handler, sdrSource):
         self.handler = handler
         self.sdrSource = sdrSource
-        self.metaParser = MetaParser(self.handler)
-        self.wsjtParser = WsjtParser(self.handler)
-        self.aprsParser = AprsParser(self.handler)
+        self.parsers = {
+            "meta": MetaParser(self.handler),
+            "wsjt_demod": WsjtParser(self.handler),
+            "packet_demod": AprsParser(self.handler),
+            "pocsag_demod": PocsagParser(self.handler),
+        }
 
         self.localProps = (
             self.sdrSource.getProps()
@@ -53,9 +57,8 @@ class DspManager(csdr.output):
 
         def set_dial_freq(key, value):
             freq = self.localProps["center_freq"] + self.localProps["offset_freq"]
-            self.wsjtParser.setDialFrequency(freq)
-            self.aprsParser.setDialFrequency(freq)
-            self.metaParser.setDialFrequency(freq)
+            for parser in self.parsers.values():
+                parser.setDialFrequency(freq)
 
         self.subscriptions = [
             self.localProps.getProperty("audio_compression").wire(self.dsp.set_audio_compression),
@@ -115,10 +118,10 @@ class DspManager(csdr.output):
             "smeter": self.handler.write_s_meter_level,
             "secondary_fft": self.handler.write_secondary_fft,
             "secondary_demod": self.handler.write_secondary_demod,
-            "meta": self.metaParser.parse,
-            "wsjt_demod": self.wsjtParser.parse,
-            "packet_demod": self.aprsParser.parse,
         }
+        for demod, parser in self.parsers.items():
+            writers[demod] = parser.parse
+
         write = writers[t]
 
         threading.Thread(target=self.pump(read_fn, write)).start()

owrx/meta.py

@@ -6,6 +6,7 @@ import logging
 import threading
 from owrx.map import Map, LatLngLocation
 from owrx.bands import Bandplan
+from owrx.parser import Parser
 
 logger = logging.getLogger(__name__)
 
@@ -83,17 +84,10 @@ class YsfMetaEnricher(object):
         return None
 
 
-class MetaParser(object):
+class MetaParser(Parser):
     def __init__(self, handler):
-        self.handler = handler
+        super().__init__(handler)
         self.enrichers = {"DMR": DmrMetaEnricher(), "YSF": YsfMetaEnricher(self)}
-        self.band = None
-
-    def setDialFrequency(self, freq):
-        self.band = Bandplan.getSharedInstance().findBand(freq)
-
-    def getBand(self):
-        return self.band
 
     def parse(self, meta):
         fields = meta.split(";")

owrx/parser.py

@@ -0,0 +1,20 @@
+from abc import ABC, abstractmethod
+from owrx.bands import Bandplan
+
+
+class Parser(ABC):
+    def __init__(self, handler):
+        self.handler = handler
+        self.dial_freq = None
+        self.band = None
+
+    @abstractmethod
+    def parse(self, raw):
+        pass
+
+    def setDialFrequency(self, freq):
+        self.dial_freq = freq
+        self.band = Bandplan.getSharedInstance().findBand(freq)
+
+    def getBand(self):
+        return self.band

owrx/pocsag.py

@@ -0,0 +1,8 @@
+from owrx.parser import Parser
+
+
+class PocsagParser(Parser):
+    def parse(self, raw):
+        fields = raw.decode("ascii", "replace").rstrip("\n").split(";")
+        meta = {v[0]: "".join(v[1:]) for v in map(lambda x: x.split(":"), fields) if v[0] != ""}
+        self.handler.write_pocsag_data(meta)

owrx/wsjt.py

@@ -11,6 +11,7 @@ from owrx.config import PropertyManager
 from owrx.bands import Bandplan
 from owrx.metrics import Metrics, CounterMetric, DirectMetric
 from owrx.pskreporter import PskReporter
+from owrx.parser import Parser
 
 import logging
 
@@ -258,12 +259,7 @@ class Ft4Chopper(WsjtChopper):
         return ["jt9", "--ft4", "-d", str(self.decoding_depth("ft4")), file]
 
 
-class WsjtParser(object):
-    def __init__(self, handler):
-        self.handler = handler
-        self.dial_freq = None
-        self.band = None
-
+class WsjtParser(Parser):
     modes = {"~": "FT8", "#": "JT65", "@": "JT9", "+": "FT4"}
 
     def parse(self, data):
@@ -312,10 +308,6 @@ class WsjtParser(object):
 
         metric.inc()
 
-    def setDialFrequency(self, freq):
-        self.dial_freq = freq
-        self.band = Bandplan.getSharedInstance().findBand(freq)
-
 
 class Decoder(object):
     def parse_timestamp(self, instring, dateformat):