show codecserver errors in the client

csdr/chain/demodulator.py

@@ -67,3 +67,7 @@ class SecondaryDemodulator(Chain):
 
 class ServiceDemodulator(SecondaryDemodulator, FixedAudioRateChain, metaclass=ABCMeta):
     pass
+
+
+class DemodulatorError(Exception):
+    pass

csdr/chain/digiham.py

@@ -1,8 +1,8 @@
-from csdr.chain.demodulator import BaseDemodulatorChain, FixedAudioRateChain, FixedIfSampleRateChain, DialFrequencyReceiver, MetaProvider, SlotFilterChain
+from csdr.chain.demodulator import BaseDemodulatorChain, FixedAudioRateChain, FixedIfSampleRateChain, DialFrequencyReceiver, MetaProvider, SlotFilterChain, DemodulatorError
 from pycsdr.modules import FmDemod, Agc, Writer, Buffer
 from pycsdr.types import Format
 from digiham.modules import DstarDecoder, DcBlock, FskDemodulator, GfskDemodulator, DigitalVoiceFilter, MbeSynthesizer, NarrowRrcFilter, NxdnDecoder, DmrDecoder, WideRrcFilter, YsfDecoder
-from digiham.ambe import Modes
+from digiham.ambe import Modes, ServerError
 from owrx.meta import MetaParser
 
 
@@ -17,10 +17,16 @@ class DigihamChain(BaseDemodulatorChain, FixedIfSampleRateChain, FixedAudioRateC
         workers = [FmDemod(), DcBlock()]
         if filter is not None:
             workers += [filter]
+        try:
+            mbeSynthesizer = MbeSynthesizer(mbeMode, codecserver)
+        except ConnectionError as ce:
+            raise DemodulatorError("Connection to codecserver failed: {}".format(ce))
+        except ServerError as se:
+            raise DemodulatorError("Codecserver error: {}".format(se))
         workers += [
             fskDemodulator,
             decoder,
-            MbeSynthesizer(mbeMode, codecserver),
+            mbeSynthesizer,
             DigitalVoiceFilter(),
             agc
         ]

htdocs/openwebrx.js

@@ -838,6 +838,9 @@ function on_ws_recv(evt) {
                         $overlay.show();
                         $("#openwebrx-panel-receiver").demodulatorPanel().stopDemodulator();
                         break;
+                    case "demodulator_error":
+                        divlog(json['value'], true);
+                        break;
                     case 'secondary_demod':
                         var value = json['value'];
                         var panels = [

owrx/connection.py

@@ -422,6 +422,9 @@ class OpenWebRxReceiverClient(OpenWebRxClient, SdrSourceEventClient):
     def write_sdr_error(self, message):
         self.send({"type": "sdr_error", "value": message})
 
+    def write_demodulator_error(self, message):
+        self.send({"type": "demodulator_error", "value": message})
+
     def write_backoff_message(self, reason):
         self.send({"type": "backoff", "reason": reason})
 

owrx/dsp.py

@@ -3,7 +3,7 @@ from owrx.property import PropertyStack, PropertyLayer, PropertyValidator
 from owrx.property.validators import OrValidator, RegexValidator, BoolValidator
 from owrx.modes import Modes, DigitalMode
 from csdr.chain import Chain
-from csdr.chain.demodulator import BaseDemodulatorChain, FixedIfSampleRateChain, FixedAudioRateChain, HdAudio, SecondaryDemodulator, DialFrequencyReceiver, MetaProvider, SlotFilterChain, SecondarySelectorChain, DeemphasisTauChain
+from csdr.chain.demodulator import BaseDemodulatorChain, FixedIfSampleRateChain, FixedAudioRateChain, HdAudio, SecondaryDemodulator, DialFrequencyReceiver, MetaProvider, SlotFilterChain, SecondarySelectorChain, DeemphasisTauChain, DemodulatorError
 from csdr.chain.selector import Selector, SecondarySelector
 from csdr.chain.clientaudio import ClientAudioChain
 from csdr.chain.fft import FftChain
@@ -544,19 +544,22 @@ class DspManager(SdrSourceEventClient, ClientDemodulatorSecondaryDspEventClient)
             return FreeDV()
 
     def setDemodulator(self, mod):
-        demodulator = self._getDemodulator(mod)
+        try:
-        if demodulator is None:
+            demodulator = self._getDemodulator(mod)
-            raise ValueError("unsupported demodulator: {}".format(mod))
+            if demodulator is None:
-        self.chain.setDemodulator(demodulator)
+                raise ValueError("unsupported demodulator: {}".format(mod))
+            self.chain.setDemodulator(demodulator)
 
-        output = "hd_audio" if isinstance(demodulator, HdAudio) else "audio"
+            output = "hd_audio" if isinstance(demodulator, HdAudio) else "audio"
 
-        if output != self.audioOutput:
+            if output != self.audioOutput:
-            self.audioOutput = output
+                self.audioOutput = output
-            # re-wire the audio to the correct client API
+                # re-wire the audio to the correct client API
-            buffer = Buffer(self.chain.getOutputFormat())
+                buffer = Buffer(self.chain.getOutputFormat())
-            self.chain.setWriter(buffer)
+                self.chain.setWriter(buffer)
-            self.wireOutput(self.audioOutput, buffer)
+                self.wireOutput(self.audioOutput, buffer)
+        except DemodulatorError as de:
+            self.handler.write_demodulator_error(str(de))
 
     def _getSecondaryDemodulator(self, mod) -> Optional[SecondaryDemodulator]:
         if isinstance(mod, SecondaryDemodulator):