restore aprs functionality

csdr/__init__.py

@@ -30,7 +30,6 @@ from functools import partial
 
 from csdr.output import Output
 
-from owrx.aprs.kiss import KissClient
 from owrx.aprs.direwolf import DirewolfConfig, DirewolfConfigSubscriber
 from owrx.audio.chopper import AudioChopper
 

csdr/chain/__init__.py

@@ -1,5 +1,6 @@
 from csdr.module import Module
 from pycsdr.modules import Buffer
+from pycsdr.types import Format
 from typing import Union, Callable
 
 
@@ -133,7 +134,13 @@ class Chain(Module):
             self.clientReader.stop()
             self.clientReader = None
 
-    def getOutputFormat(self):
+    def getInputFormat(self) -> Format:
+        if self.workers:
+            return self.workers[0].getInputFormat()
+        else:
+            raise BufferError("getInputFormat on empty chain")
+
+    def getOutputFormat(self) -> Format:
         if self.workers:
             return self.workers[-1].getOutputFormat()
         else:

csdr/chain/analog.py

@@ -19,6 +19,7 @@ class Am(BaseDemodulatorChain):
 
 class NFm(BaseDemodulatorChain):
     def __init__(self, sampleRate: int):
+        self.sampleRate = sampleRate
         agc = Agc(Format.FLOAT)
         agc.setProfile(AgcProfile.SLOW)
         agc.setMaxGain(3)
@@ -30,6 +31,12 @@ class NFm(BaseDemodulatorChain):
         ]
         super().__init__(workers)
 
+    def setSampleRate(self, sampleRate: int) -> None:
+        if sampleRate == self.sampleRate:
+            return
+        self.sampleRate = sampleRate
+        self.replace(2, NfmDeemphasis(sampleRate))
+
 
 class WFm(BaseDemodulatorChain, FixedIfSampleRateChain, HdAudio):
     def __init__(self, sampleRate: int, tau: float):

csdr/chain/demodulator.py

@@ -6,9 +6,13 @@ class BaseDemodulatorChain(Chain):
     def supportsSquelch(self) -> bool:
         return True
 
+    def setSampleRate(self, sampleRate: int) -> None:
+        pass
+
 
 class SecondaryDemodulator(Chain):
-    pass
+    def supportsSquelch(self) -> bool:
+        return True
 
 
 class FixedAudioRateChain(ABC):

csdr/chain/digimodes.py

@@ -1,7 +1,10 @@
 from csdr.chain.demodulator import SecondaryDemodulator, FixedAudioRateChain, DialFrequencyReceiver
 from owrx.audio.chopper import AudioChopper
-from pycsdr.modules import Agc, Convert
+from owrx.aprs.kiss import KissDeframer
+from owrx.aprs import Ax25Parser, AprsParser
+from pycsdr.modules import Convert, FmDemod
 from pycsdr.types import Format
+from owrx.aprs.module import DirewolfModule
 
 
 class AudioChopperDemodulator(SecondaryDemodulator, FixedAudioRateChain, DialFrequencyReceiver):
@@ -16,3 +19,26 @@ class AudioChopperDemodulator(SecondaryDemodulator, FixedAudioRateChain, DialFre
 
     def setDialFrequency(self, frequency: int) -> None:
         self.chopper.setDialFrequency(frequency)
+
+
+class PacketDemodulator(SecondaryDemodulator, FixedAudioRateChain, DialFrequencyReceiver):
+    def __init__(self, service: bool = False):
+        self.parser = AprsParser()
+        workers = [
+            FmDemod(),
+            Convert(Format.FLOAT, Format.SHORT),
+            DirewolfModule(service=service),
+            KissDeframer(),
+            Ax25Parser(),
+            self.parser,
+        ]
+        super().__init__(workers)
+
+    def supportsSquelch(self) -> bool:
+        return False
+
+    def getFixedAudioRate(self) -> int:
+        return 48000
+
+    def setDialFrequency(self, frequency: int) -> None:
+        self.parser.setDialFrequency(frequency)

csdr/chain/selector.py

@@ -62,7 +62,7 @@ class Decimator(Chain):
 
 
 class Selector(Chain):
-    def __init__(self, inputRate: int, outputRate: int, shiftRate: float):
+    def __init__(self, inputRate: int, outputRate: int, shiftRate: float, withSquelch: bool = True):
         self.outputRate = outputRate
 
         self.shift = Shift(shiftRate)
@@ -73,12 +73,14 @@ class Selector(Chain):
         self.bandpassCutoffs = None
         self.setBandpass(-4000, 4000)
 
-        self.readings_per_second = 4
+        workers = [self.shift, self.decimation, self.bandpass]
-        # s-meter readings are available every 1024 samples
-        # the reporting interval is measured in those 1024-sample blocks
-        self.squelch = Squelch(5, int(outputRate / (self.readings_per_second * 1024)))
 
-        workers = [self.shift, self.decimation, self.bandpass, self.squelch]
+        if withSquelch:
+            self.readings_per_second = 4
+            # s-meter readings are available every 1024 samples
+            # the reporting interval is measured in those 1024-sample blocks
+            self.squelch = Squelch(5, int(outputRate / (self.readings_per_second * 1024)))
+            workers += [self.squelch]
 
         super().__init__(workers)
 

csdr/module.py

@@ -1,14 +1,25 @@
-import pycsdr.modules
+from pycsdr.modules import Module as BaseModule
+from pycsdr.modules import Reader, Writer
+from pycsdr.types import Format
+from abc import ABCMeta, abstractmethod
 
 
-class Module(pycsdr.modules.Module):
+class Module(BaseModule, metaclass=ABCMeta):
     def __init__(self):
         self.reader = None
         self.writer = None
         super().__init__()
 
-    def setReader(self, reader: pycsdr.modules.Reader) -> None:
+    def setReader(self, reader: Reader) -> None:
         self.reader = reader
 
-    def setWriter(self, writer: pycsdr.modules.Writer) -> None:
+    def setWriter(self, writer: Writer) -> None:
         self.writer = writer
+
+    @abstractmethod
+    def getInputFormat(self) -> Format:
+        pass
+
+    @abstractmethod
+    def getOutputFormat(self) -> Format:
+        pass

htdocs/lib/MessagePanel.js

@@ -4,6 +4,10 @@ function MessagePanel(el) {
     this.initClearButton();
 }
 
+MessagePanel.prototype.supportsMessage = function(message) {
+    return false;
+};
+
 MessagePanel.prototype.render = function() {
 };
 
@@ -46,10 +50,17 @@ MessagePanel.prototype.initClearButton = function() {
 function WsjtMessagePanel(el) {
     MessagePanel.call(this, el);
     this.initClearTimer();
+    this.qsoModes = ['FT8', 'JT65', 'JT9', 'FT4', 'FST4', 'Q65'];
+    this.beaconModes = ['WSPR', 'FST4W'];
+    this.modes = [].concat(this.qsoModes, this.beaconModes);
 }
 
 WsjtMessagePanel.prototype = new MessagePanel();
 
+WsjtMessagePanel.prototype.supportsMessage = function(message) {
+    return this.modes.indexOf(message['mode']) >= 0;
+};
+
 WsjtMessagePanel.prototype.render = function() {
     $(this.el).append($(
         '<table>' +
@@ -78,14 +89,14 @@ WsjtMessagePanel.prototype.pushMessage = function(msg) {
         return $('<div/>').text(input).html()
     };
 
-    if (['FT8', 'JT65', 'JT9', 'FT4', 'FST4', 'Q65'].indexOf(msg['mode']) >= 0) {
+    if (this.qsoModes.indexOf(msg['mode']) >= 0) {
         matches = linkedmsg.match(/(.*\s[A-Z0-9]+\s)([A-R]{2}[0-9]{2})$/);
         if (matches && matches[2] !== 'RR73') {
             linkedmsg = html_escape(matches[1]) + '<a href="map?locator=' + matches[2] + '" target="openwebrx-map">' + matches[2] + '</a>';
         } else {
             linkedmsg = html_escape(linkedmsg);
         }
-    } else if (['WSPR', 'FST4W'].indexOf(msg['mode']) >= 0) {
+    } else if (this.beaconModes.indexOf(msg['mode']) >= 0) {
         matches = linkedmsg.match(/([A-Z0-9]*\s)([A-R]{2}[0-9]{2})(\s[0-9]+)/);
         if (matches) {
             linkedmsg = html_escape(matches[1]) + '<a href="map?locator=' + matches[2] + '" target="openwebrx-map">' + matches[2] + '</a>' + html_escape(matches[3]);
@@ -108,7 +119,7 @@ WsjtMessagePanel.prototype.pushMessage = function(msg) {
 $.fn.wsjtMessagePanel = function(){
     if (!this.data('panel')) {
         this.data('panel', new WsjtMessagePanel(this));
-    };
+    }
     return this.data('panel');
 };
 
@@ -119,6 +130,10 @@ function PacketMessagePanel(el) {
 
 PacketMessagePanel.prototype = new MessagePanel();
 
+PacketMessagePanel.prototype.supportsMessage = function(message) {
+    return message['mode'] === 'APRS';
+};
+
 PacketMessagePanel.prototype.render = function() {
     $(this.el).append($(
         '<table>' +
@@ -243,6 +258,6 @@ PocsagMessagePanel.prototype.pushMessage = function(msg) {
 $.fn.pocsagMessagePanel = function() {
     if (!this.data('panel')) {
         this.data('panel', new PocsagMessagePanel(this));
-    };
+    }
     return this.data('panel');
 };

htdocs/openwebrx.js

@@ -824,9 +824,6 @@ function on_ws_recv(evt) {
                     case "js8_message":
                         $("#openwebrx-panel-js8-message").js8().pushMessage(json['value']);
                         break;
-                    case "wsjt_message":
-                        $("#openwebrx-panel-wsjt-message").wsjtMessagePanel().pushMessage(json['value']);
-                        break;
                     case "dial_frequencies":
                         var as_bookmarks = json['value'].map(function (d) {
                             return {
@@ -837,9 +834,6 @@ function on_ws_recv(evt) {
                         });
                         bookmarks.replace_bookmarks(as_bookmarks, 'dial_frequencies');
                         break;
-                    case "aprs_data":
-                        $('#openwebrx-panel-packet-message').packetMessagePanel().pushMessage(json['value']);
-                        break;
                     case "bookmarks":
                         bookmarks.replace_bookmarks(json['value'], "server");
                         break;
@@ -851,7 +845,18 @@ function on_ws_recv(evt) {
                         $("#openwebrx-panel-receiver").demodulatorPanel().stopDemodulator();
                         break;
                     case 'secondary_demod':
-                        secondary_demod_push_data(json['value']);
+                        var value = json['value'];
+                        var panels = [
+                            $("#openwebrx-panel-wsjt-message").wsjtMessagePanel(),
+                            $('#openwebrx-panel-packet-message').packetMessagePanel()
+                        ];
+                        if (!panels.some(function(panel) {
+                            if (!panel.supportsMessage(value)) return false;
+                            panel.pushMessage(value);
+                            return true;
+                        })) {
+                            secondary_demod_push_data(value);
+                        }
                         break;
                     case 'log_message':
                         divlog(json['value'], true);

owrx/aprs/__init__.py

@@ -1,10 +1,15 @@
-from owrx.aprs.kiss import KissDeframer
 from owrx.map import Map, LatLngLocation
 from owrx.metrics import Metrics, CounterMetric
-from owrx.parser import Parser
+from owrx.bands import Bandplan
 from datetime import datetime, timezone
+from csdr.module import Module
+from pycsdr.modules import Reader
+from pycsdr.types import Format
+from threading import Thread
+from io import BytesIO
 import re
 import logging
+import pickle
 
 logger = logging.getLogger(__name__)
 
@@ -45,7 +50,40 @@ def getSymbolData(symbol, table):
     return {"symbol": symbol, "table": table, "index": ord(symbol) - 33, "tableindex": ord(table) - 33}
 
 
-class Ax25Parser(object):
+class Ax25Parser(Module, Thread):
+    def __init__(self):
+        self.doRun = True
+        super().__init__()
+
+    def getInputFormat(self) -> Format:
+        return Format.CHAR
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
+    def setReader(self, reader: Reader) -> None:
+        super().setReader(reader)
+        self.start()
+
+    def stop(self):
+        self.doRun = False
+        self.reader.stop()
+
+    def run(self):
+        while self.doRun:
+            data = self.reader.read()
+            if data is None:
+                self.doRun = False
+                break
+            io = BytesIO(data.tobytes())
+            try:
+                while True:
+                    frame = self.parse(pickle.load(io))
+                    if frame is not None:
+                        self.writer.write(pickle.dumps(frame))
+            except EOFError:
+                pass
+
     def parse(self, ax25frame):
         control_pid = ax25frame.find(bytes([0x03, 0xF0]))
         if control_pid % 7 > 0:
@@ -54,7 +92,7 @@ class Ax25Parser(object):
         def chunks(l, n):
             """Yield successive n-sized chunks from l."""
             for i in range(0, len(l), n):
-                yield l[i : i + n]
+                yield l[i:i + n]
 
         return {
             "destination": self.extractCallsign(ax25frame[0:7]),
@@ -117,9 +155,9 @@ class WeatherParser(object):
         WeatherMapping("s", "snowfall", 3, lambda x: x * 25.4),
     ]
 
-    def __init__(self, data, weather={}):
+    def __init__(self, data, weather=None):
         self.data = data
-        self.weather = weather
+        self.weather = {} if weather is None else weather
 
     def getWeather(self):
         doWork = True
@@ -151,16 +189,44 @@ class AprsLocation(LatLngLocation):
         return res
 
 
-class AprsParser(Parser):
+class AprsParser(Module, Thread):
-    def __init__(self, handler):
+    def __init__(self):
-        super().__init__(handler)
+        super().__init__()
-        self.ax25parser = Ax25Parser()
-        self.deframer = KissDeframer()
         self.metrics = {}
+        self.doRun = True
+        self.band = None
 
     def setDialFrequency(self, freq):
-        super().setDialFrequency(freq)
+        self.band = Bandplan.getSharedInstance().findBand(freq)
-        self.metrics = {}
+
+    def setReader(self, reader: Reader) -> None:
+        super().setReader(reader)
+        self.start()
+
+    def getInputFormat(self) -> Format:
+        return Format.CHAR
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
+    def run(self):
+        while self.doRun:
+            data = self.reader.read()
+            if data is None:
+                self.doRun = False
+                break
+            io = BytesIO(data.tobytes())
+            try:
+                while True:
+                    frame = self.parse(pickle.load(io))
+                    if frame is not None:
+                        self.writer.write(pickle.dumps(frame))
+            except EOFError:
+                pass
+
+    def stop(self):
+        self.doRun = False
+        self.reader.stop()
 
     def getMetric(self, category):
         if category not in self.metrics:
@@ -184,22 +250,22 @@ class AprsParser(Parser):
             return False
         return True
 
-    def parse(self, raw):
+    def parse(self, data):
-        for frame in self.deframer.parse(raw):
+        try:
-            try:
+            # TODO how can we tell if this is an APRS frame at all?
-                data = self.ax25parser.parse(frame)
+            aprsData = self.parseAprsData(data)
 
-                # TODO how can we tell if this is an APRS frame at all?
+            logger.debug("decoded APRS data: %s", aprsData)
-                aprsData = self.parseAprsData(data)
+            self.updateMap(aprsData)
+            self.getMetric("total").inc()
+            if self.isDirect(aprsData):
+                self.getMetric("direct").inc()
 
-                logger.debug("decoded APRS data: %s", aprsData)
+            # the frontend uses this to distinguis hessages from the different parsers
-                self.updateMap(aprsData)
+            aprsData["mode"] = "APRS"
-                self.getMetric("total").inc()
+            return aprsData
-                if self.isDirect(aprsData):
+        except Exception:
-                    self.getMetric("direct").inc()
+            logger.exception("exception while parsing aprs data")
-                self.handler.write_aprs_data(aprsData)
-            except Exception:
-                logger.exception("exception while parsing aprs data")
 
     def updateMap(self, mapData):
         if "type" in mapData and mapData["type"] == "thirdparty" and "data" in mapData:

owrx/aprs/kiss.py

@@ -1,5 +1,10 @@
+from pycsdr.modules import Reader
+from pycsdr.types import Format
+from csdr.module import Module
+from threading import Thread
 import socket
 import time
+import pickle
 
 import logging
 
@@ -11,33 +16,37 @@ TFEND = 0xDC
 TFESC = 0xDD
 
 
-class KissClient(object):
+class KissDeframer(Module, Thread):
-    def __init__(self, port):
-        delay = 0.5
-        retries = 0
-        while True:
-            try:
-                self.socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
-                self.socket.connect(("localhost", port))
-                break
-            except ConnectionError:
-                if retries > 20:
-                    logger.error("maximum number of connection attempts reached. did direwolf start up correctly?")
-                    raise
-                retries += 1
-            time.sleep(delay)
-
-    def read(self):
-        return self.socket.recv(1)
-
-
-class KissDeframer(object):
     def __init__(self):
         self.escaped = False
         self.buf = bytearray()
+        self.doRun = True
+        super().__init__()
+
+    def getInputFormat(self) -> Format:
+        return Format.CHAR
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
+    def setReader(self, reader: Reader) -> None:
+        super().setReader(reader)
+        self.start()
+
+    def run(self):
+        while self.doRun:
+            data = self.reader.read()
+            if data is None:
+                self.doRun = False
+            else:
+                for frame in self.parse(data):
+                    self.writer.write(pickle.dumps(frame))
+
+    def stop(self):
+        self.doRun = False
+        self.reader.stop()
 
     def parse(self, input):
-        frames = []
         for b in input:
             if b == FESC:
                 self.escaped = True
@@ -49,11 +58,10 @@ class KissDeframer(object):
                 else:
                     logger.warning("invalid escape char: %s", str(input[0]))
                 self.escaped = False
-            elif input[0] == FEND:
+            elif b == FEND:
                 # data frames start with 0x00
                 if len(self.buf) > 1 and self.buf[0] == 0x00:
-                    frames += [self.buf[1:]]
+                    yield self.buf[1:]
                 self.buf = bytearray()
             else:
                 self.buf.append(b)
-        return frames

owrx/aprs/module.py

@@ -0,0 +1,94 @@
+from csdr.module import Module
+from pycsdr.types import Format
+from pycsdr.modules import Reader, Writer, TcpSource
+from subprocess import Popen, PIPE
+from owrx.aprs.direwolf import DirewolfConfig
+from owrx.config.core import CoreConfig
+import threading
+import time
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+
+class DirewolfModule(Module):
+    def __init__(self, service: bool = False):
+        self.process = None
+        self.inputReader = None
+        self.tcpSource = None
+        self.service = service
+        super().__init__()
+
+    def setReader(self, reader: Reader) -> None:
+        super().setReader(reader)
+        self.start()
+
+    def setWriter(self, writer: Writer) -> None:
+        super().setWriter(writer)
+        if self.tcpSource is not None:
+            self.tcpSource.setWriter(writer)
+
+    def getInputFormat(self) -> Format:
+        return Format.SHORT
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
+    def start(self):
+        temporary_directory = CoreConfig().get_temporary_directory()
+        direwolf_config_path = "{tmp_dir}/openwebrx_direwolf_{myid}.conf".format(
+            tmp_dir=temporary_directory, myid=id(self)
+        )
+        direwolf_config = DirewolfConfig()
+        # TODO
+        # direwolf_config.wire(self)
+
+        file = open(direwolf_config_path, "w")
+        file.write(direwolf_config.getConfig(self.service))
+        file.close()
+
+        # direwolf -c {direwolf_config} -r {audio_rate} -t 0 -q d -q h 1>&2
+        self.process = Popen(
+            ["direwolf", "-c", direwolf_config_path, "-r", "48000", "-t", "0", "-q", "d", "-q", "h"],
+            start_new_session=True,
+            stdin=PIPE,
+        )
+
+        threading.Thread(target=self.pump(self.reader.read, self.process.stdin.write)).start()
+
+        delay = 0.5
+        retries = 0
+        while True:
+            try:
+                self.tcpSource = TcpSource(direwolf_config.getPort(), Format.CHAR)
+                if self.writer:
+                    self.tcpSource.setWriter(self.writer)
+                break
+            except ConnectionError:
+                if retries > 20:
+                    logger.error("maximum number of connection attempts reached. did direwolf start up correctly?")
+                    raise
+                retries += 1
+            time.sleep(delay)
+
+    def stop(self):
+        if self.process is not None:
+            self.process.terminate()
+            self.process.wait()
+            self.process = None
+        self.reader.stop()
+
+    def pump(self, read, write):
+        def copy():
+            while True:
+                data = None
+                try:
+                    data = read()
+                except ValueError:
+                    pass
+                if data is None or isinstance(data, bytes) and len(data) == 0:
+                    break
+                write(data)
+
+        return copy

owrx/audio/chopper.py

@@ -5,6 +5,7 @@ from owrx.audio import ProfileSourceSubscriber
 from owrx.audio.wav import AudioWriter
 from owrx.audio.queue import QueueJob
 from csdr.module import Module
+from pycsdr.types import Format
 import pickle
 
 import logging
@@ -27,6 +28,12 @@ class AudioChopper(threading.Thread, Module, ProfileSourceSubscriber):
         super().__init__()
         Module.__init__(self)
 
+    def getInputFormat(self) -> Format:
+        return Format.SHORT
+
+    def getOutputFormat(self) -> Format:
+        return Format.CHAR
+
     def stop_writers(self):
         while self.writers:
             self.writers.pop().stop()

owrx/connection.py

@@ -399,9 +399,13 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
     def write_secondary_fft(self, data):
         self.send(bytes([0x03]) + data)
 
-    def write_secondary_demod(self, data):
+    def write_secondary_demod(self, message):
-        message = data.decode("ascii", "replace")
+        io = BytesIO(message.tobytes())
-        self.send({"type": "secondary_demod", "value": message})
+        try:
+            while True:
+                self.send({"type": "secondary_demod", "value": pickle.load(io)})
+        except EOFError:
+            pass
 
     def write_secondary_dsp_config(self, cfg):
         self.send({"type": "secondary_config", "value": cfg})
@@ -418,23 +422,12 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
     def write_metadata(self, metadata):
         self.send({"type": "metadata", "value": metadata})
 
-    def write_wsjt_message(self, message):
-        io = BytesIO(message.tobytes())
-        try:
-            while True:
-                self.send({"type": "wsjt_message", "value": pickle.load(io)})
-        except EOFError:
-            pass
-
     def write_dial_frequencies(self, frequencies):
         self.send({"type": "dial_frequencies", "value": frequencies})
 
     def write_bookmarks(self, bookmarks):
         self.send({"type": "bookmarks", "value": bookmarks})
 
-    def write_aprs_data(self, data):
-        self.send({"type": "aprs_data", "value": data})
-
     def write_log_message(self, message):
         self.send({"type": "log_message", "value": message})
 

owrx/dsp.py

@@ -15,7 +15,7 @@ from csdr.chain.clientaudio import ClientAudioChain
 from csdr.chain.analog import NFm, WFm, Am, Ssb
 from csdr.chain.digiham import DigihamChain, Dmr, Dstar, Nxdn, Ysf
 from csdr.chain.fft import FftChain
-from csdr.chain.digimodes import AudioChopperDemodulator
+from csdr.chain.digimodes import AudioChopperDemodulator, PacketDemodulator
 from pycsdr.modules import Buffer, Writer
 from pycsdr.types import Format
 from typing import Union
@@ -66,7 +66,7 @@ class ClientDemodulatorChain(Chain):
             format = w1.getOutputFormat()
             if self.audioBuffer is None or self.audioBuffer.getFormat() != format:
                 self.audioBuffer = Buffer(format)
-                if self.secondaryDemodulator is not None:
+                if self.secondaryDemodulator is not None and self.secondaryDemodulator.getInputFormat() is not Format.COMPLEX_FLOAT:
                     self.secondaryDemodulator.setReader(self.audioBuffer.getReader())
             super()._connect(w1, w2, self.audioBuffer)
         else:
@@ -94,28 +94,33 @@ class ClientDemodulatorChain(Chain):
 
         if isinstance(self.demodulator, FixedIfSampleRateChain):
             self.selector.setOutputRate(self.demodulator.getFixedIfSampleRate())
-        elif self.secondaryDemodulator is not None and isinstance(self.secondaryDemodulator, FixedAudioRateChain):
+        elif isinstance(self.secondaryDemodulator, FixedAudioRateChain):
             self.selector.setOutputRate(self.secondaryDemodulator.getFixedAudioRate())
         else:
             self.selector.setOutputRate(outputRate)
+        self.demodulator.setSampleRate(outputRate)
 
         if isinstance(self.demodulator, FixedAudioRateChain):
             self.clientAudioChain.setInputRate(self.demodulator.getFixedAudioRate())
-        elif self.secondaryDemodulator is not None and isinstance(self.secondaryDemodulator, FixedAudioRateChain):
+        elif isinstance(self.secondaryDemodulator, FixedAudioRateChain):
             self.clientAudioChain.setInputRate(self.secondaryDemodulator.getFixedAudioRate())
         else:
             self.clientAudioChain.setInputRate(outputRate)
 
-        if not demodulator.supportsSquelch():
+        self._syncSquelch()
-            self.selector.setSquelchLevel(-150)
-        else:
-            self.selector.setSquelchLevel(self.squelchLevel)
 
         self.clientAudioChain.setClientRate(outputRate)
 
         if self.metaWriter is not None and isinstance(demodulator, DigihamChain):
             demodulator.setMetaWriter(self.metaWriter)
 
+    def _getSelectorOutputRate(self):
+        if isinstance(self.secondaryDemodulator, FixedAudioRateChain):
+            if isinstance(self.demodulator, FixedAudioRateChain) and self.demodulator.getFixedAudioRate() != self.secondaryDemodulator.getFixedAudioRate():
+                raise ValueError("secondary and primary demodulator chain audio rates do not match!")
+            return self.secondaryDemodulator.getFixedAudioRate()
+        return self.outputRate
+
     def setSecondaryDemodulator(self, demod: Union[SecondaryDemodulator, None]):
         if demod is self.secondaryDemodulator:
             return
@@ -125,19 +130,18 @@ class ClientDemodulatorChain(Chain):
 
         self.secondaryDemodulator = demod
 
-        if self.secondaryDemodulator is not None and isinstance(self.secondaryDemodulator, FixedAudioRateChain):
+        rate = self._getSelectorOutputRate()
-            if isinstance(self.demodulator, FixedAudioRateChain) and self.demodulator.getFixedAudioRate() != self.secondaryDemodulator.getFixedAudioRate():
-                raise ValueError("secondary and primary demodulator chain audio rates do not match!")
-            else:
-                rate = self.secondaryDemodulator.getFixedAudioRate()
-        else:
-            rate = self.outputRate
         self.selector.setOutputRate(rate)
         self.clientAudioChain.setInputRate(rate)
+        self.demodulator.setSampleRate(rate)
         self._updateDialFrequency()
+        self._syncSquelch()
 
         if self.secondaryDemodulator is not None:
-            self.secondaryDemodulator.setReader(self.audioBuffer.getReader())
+            if self.secondaryDemodulator.getInputFormat() is Format.COMPLEX_FLOAT:
+                self.secondaryDemodulator.setReader(self.selectorBuffer.getReader())
+            else:
+                self.secondaryDemodulator.setReader(self.audioBuffer.getReader())
             self.secondaryDemodulator.setWriter(self.secondaryWriter)
 
         if self.secondaryDemodulator is None and self.secondaryFftChain is not None:
@@ -146,10 +150,19 @@ class ClientDemodulatorChain(Chain):
 
         if self.secondaryDemodulator is not None and self.secondaryFftChain is None:
             # TODO eliminate constants
-            self.secondaryFftChain = FftChain(self.outputRate, 2048, 0.3, 9, "adpcm")
+            self.secondaryFftChain = FftChain(self._getSelectorOutputRate(), 2048, 0.3, 9, "adpcm")
             self.secondaryFftChain.setReader(self.selectorBuffer.getReader())
             self.secondaryFftChain.setWriter(self.secondaryFftWriter)
 
+        if self.secondaryFftChain is not None:
+            self.secondaryFftChain.setSampleRate(rate)
+
+    def _syncSquelch(self):
+        if not self.demodulator.supportsSquelch() or (self.secondaryDemodulator is not None and not self.secondaryDemodulator.supportsSquelch()):
+            self.selector.setSquelchLevel(-150)
+        else:
+            self.selector.setSquelchLevel(self.squelchLevel)
+
     def setLowCut(self, lowCut):
         self.selector.setLowCut(lowCut)
 
@@ -189,9 +202,7 @@ class ClientDemodulatorChain(Chain):
         if level == self.squelchLevel:
             return
         self.squelchLevel = level
-        if not self.demodulator.supportsSquelch():
+        self._syncSquelch()
-            return
-        self.selector.setSquelchLevel(level)
 
     def setOutputRate(self, outputRate) -> None:
         if outputRate == self.outputRate:
@@ -203,6 +214,7 @@ class ClientDemodulatorChain(Chain):
             return
         if not isinstance(self.demodulator, FixedIfSampleRateChain):
             self.selector.setOutputRate(outputRate)
+            self.demodulator.setSampleRate(outputRate)
         if not isinstance(self.demodulator, FixedAudioRateChain):
             self.clientAudioChain.setClientRate(outputRate)
 
@@ -271,7 +283,6 @@ class DspManager(Output, SdrSourceEventClient):
         self.sdrSource = sdrSource
         self.parsers = {
             "meta": MetaParser(self.handler),
-            "packet_demod": AprsParser(self.handler),
             "pocsag_demod": PocsagParser(self.handler),
             "js8_demod": Js8Parser(self.handler),
         }
@@ -354,7 +365,7 @@ class DspManager(Output, SdrSourceEventClient):
         buffer = Buffer(Format.CHAR)
         self.chain.setSecondaryWriter(buffer)
         # TODO there's multiple outputs depending on the modulation right now
-        self.wireOutput("wsjt_demod", buffer)
+        self.wireOutput("secondary_demod", buffer)
 
         def set_dial_freq(changes):
             if (
@@ -481,6 +492,8 @@ class DspManager(Output, SdrSourceEventClient):
         # TODO add remaining modes
         if mod in ["ft8", "wspr", "jt65", "jt9", "ft4", "fst4", "fst4w", "q65"]:
             return AudioChopperDemodulator(mod, WsjtParser())
+        elif mod == "packet":
+            return PacketDemodulator()
         return None
 
     def setSecondaryDemodulator(self, mod):
@@ -520,7 +533,6 @@ class DspManager(Output, SdrSourceEventClient):
             "smeter": self.handler.write_s_meter_level,
             "secondary_fft": self.handler.write_secondary_fft,
             "secondary_demod": self.handler.write_secondary_demod,
-            "wsjt_demod": self.handler.write_wsjt_message,
         }
         for demod, parser in self.parsers.items():
             writers[demod] = parser.parse

owrx/meta.py

@@ -140,8 +140,7 @@ class DStarEnricher(Enricher):
             try:
                 # we can send the DPRS stuff through our APRS parser to extract the information
                 # TODO: only third-party parsing accepts this format right now
-                # TODO: we also need to pass a handler, which is not needed
+                parser = AprsParser()
-                parser = AprsParser(None)
                 dprsData = parser.parseThirdpartyAprsData(meta["dprs"])
                 if "data" in dprsData:
                     data = dprsData["data"]

owrx/service/__init__.py

@@ -2,68 +2,25 @@ import threading
 from owrx.source import SdrSourceEventClient, SdrSourceState, SdrClientClass
 from owrx.sdr import SdrService
 from owrx.bands import Bandplan
-from csdr.output import Output
 from owrx.wsjt import WsjtParser
-from owrx.aprs import AprsParser
-from owrx.js8 import Js8Parser
 from owrx.config import Config
 from owrx.source.resampler import Resampler
 from owrx.property import PropertyLayer, PropertyDeleted
 from js8py import Js8Frame
-from abc import ABCMeta, abstractmethod
 from owrx.service.schedule import ServiceScheduler
 from owrx.service.chain import ServiceDemodulatorChain
 from owrx.modes import Modes, DigitalMode
 from typing import Union
 from csdr.chain.demodulator import BaseDemodulatorChain, SecondaryDemodulator, DialFrequencyReceiver
 from csdr.chain.analog import NFm, Ssb
-from csdr.chain.digimodes import AudioChopperDemodulator
+from csdr.chain.digimodes import AudioChopperDemodulator, PacketDemodulator
+from pycsdr.modules import Buffer
 
 import logging
 
 logger = logging.getLogger(__name__)
 
 
-class ServiceOutput(Output, metaclass=ABCMeta):
-    def __init__(self, frequency):
-        self.frequency = frequency
-
-    @abstractmethod
-    def getParser(self):
-        # abstract method; implement in subclasses
-        pass
-
-    def receive_output(self, t, read_fn):
-        parser = self.getParser()
-        parser.setDialFrequency(self.frequency)
-        target = self.pump(read_fn, parser.parse)
-        threading.Thread(target=target, name="service_output_receive").start()
-
-
-class WsjtServiceOutput(ServiceOutput):
-    def getParser(self):
-        return WsjtParser(WsjtHandler())
-
-    def supports_type(self, t):
-        return t == "wsjt_demod"
-
-
-class AprsServiceOutput(ServiceOutput):
-    def getParser(self):
-        return AprsParser(AprsHandler())
-
-    def supports_type(self, t):
-        return t == "packet_demod"
-
-
-class Js8ServiceOutput(ServiceOutput):
-    def getParser(self):
-        return Js8Parser(Js8Handler())
-
-    def supports_type(self, t):
-        return t == "js8_demod"
-
-
 class ServiceHandler(SdrSourceEventClient):
     def __init__(self, source):
         self.lock = threading.RLock()
@@ -287,13 +244,6 @@ class ServiceHandler(SdrSourceEventClient):
 
     def setupService(self, mode, frequency, source):
         logger.debug("setting up service {0} on frequency {1}".format(mode, frequency))
-        # TODO selecting outputs will need some more intelligence here
-        if mode == "packet":
-            output = AprsServiceOutput(frequency)
-        elif mode == "js8":
-            output = Js8ServiceOutput(frequency)
-        else:
-            output = WsjtServiceOutput(frequency)
 
         modeObject = Modes.findByModulation(mode)
         if not isinstance(modeObject, DigitalMode):
@@ -312,6 +262,10 @@ class ServiceHandler(SdrSourceEventClient):
         chain = ServiceDemodulatorChain(demod, secondaryDemod, sampleRate, shift)
         chain.setBandPass(bandpass.low_cut, bandpass.high_cut)
         chain.setReader(source.getBuffer().getReader())
+
+        # dummy buffer, we don't use the output right now
+        buffer = Buffer(chain.getOutputFormat())
+        chain.setWriter(buffer)
         return chain
 
     # TODO move this elsewhere
@@ -321,7 +275,7 @@ class ServiceHandler(SdrSourceEventClient):
         # TODO: move this to Modes
         demodChain = None
         if demod == "nfm":
-            demodChain = NFm(props["output_rate"])
+            demodChain = NFm(48000)
         elif demod in ["usb", "lsb", "cw"]:
             demodChain = Ssb()
 
@@ -334,24 +288,11 @@ class ServiceHandler(SdrSourceEventClient):
         # TODO add remaining modes
         if mod in ["ft8", "wspr", "jt65", "jt9", "ft4", "fst4", "fst4w", "q65"]:
             return AudioChopperDemodulator(mod, WsjtParser())
+        elif mod == "packet":
+            return PacketDemodulator(service=True)
         return None
 
 
-class WsjtHandler(object):
-    def write_wsjt_message(self, msg):
-        pass
-
-
-class AprsHandler(object):
-    def write_aprs_data(self, data):
-        pass
-
-
-class Js8Handler(object):
-    def write_js8_message(self, frame: Js8Frame, freq: int):
-        pass
-
-
 class Services(object):
     handlers = {}
     schedulers = {}

owrx/service/chain.py

@@ -1,6 +1,7 @@
 from csdr.chain import Chain
 from csdr.chain.selector import Selector
 from csdr.chain.demodulator import BaseDemodulatorChain, SecondaryDemodulator, FixedAudioRateChain
+from pycsdr.types import Format
 
 
 class ServiceDemodulatorChain(Chain):
@@ -8,13 +9,16 @@ class ServiceDemodulatorChain(Chain):
         # TODO magic number... check if this edge case even exsists and change the api if possible
         rate = secondaryDemod.getFixedAudioRate() if isinstance(secondaryDemod, FixedAudioRateChain) else 1200
 
-        self.selector = Selector(sampleRate, rate, shiftRate)
+        self.selector = Selector(sampleRate, rate, shiftRate, withSquelch=False)
+
+        workers = [self.selector]
+
+        # primary demodulator is only necessary if the secondary does not accept IQ input
+        if secondaryDemod.getInputFormat() is not Format.COMPLEX_FLOAT:
+            workers += [demod]
+
+        workers += [secondaryDemod]
 
-        workers = [
-            self.selector,
-            demod,
-            secondaryDemod
-        ]
         super().__init__(workers)
 
     def setBandPass(self, lowCut, highCut):