Better error handling for stream failures, actually give an error message

microservice.py

@@ -107,9 +107,6 @@ def configure(radio, frequency):
         description: The specified radio is not connected.
     """
     if radio in radios:
-        if radios[radio].is_streaming():
-            return 'no', 400
-        else:
         return jsonify(radios[radio].configure(frequency))
     else:
         return "Radio not connected", 400

radio.py

@@ -5,6 +5,7 @@ from formats import *
 import sys
 import subprocess
 import struct
+from soapyhelpers import *
 
 
 class Radio:
@@ -72,15 +73,18 @@ class Radio:
         while self.run:
             # Check that the child processes are still running
             if (not is_alive(self.demod)) or (not is_alive(self.playback)):
-                print('DSP chain error, aborting stream.', file=sys.stderr)
+                print('DSP chain failed, aborting stream.', file=sys.stderr)
                 break
 
             result = self.device.readStream(self.stream, [self.buffer], Radio.SAMPLES)
 
-            if result.ret < 1:
-                print('Stream read failed, aborting stream.', file=sys.stderr)
+            if result == 0:
+                continue
+            elif result.ret < 0:
+                error = SoapyError(result.ret)
+                print("Stream read failed, aborting stream:", error, file=sys.stderr)
                 break
-
+            else:
                 read_size = int(result.ret * 2)
                 self.demod.stdin.write(
                     struct.pack(PACKINGS[Radio.FORMAT] % read_size,

soapyhelpers.py

@@ -0,0 +1,19 @@
+import SoapySDR as soapy
+from enum import IntEnum
+
+class SoapyError(IntEnum):
+    Timeout = soapy.SOAPY_SDR_TIMEOUT
+    StreamError = soapy.SOAPY_SDR_STREAM_ERROR
+    Corruption = soapy.SOAPY_SDR_CORRUPTION
+    Overflow = soapy.SOAPY_SDR_OVERFLOW
+    NotSupported = soapy.SOAPY_SDR_NOT_SUPPORTED
+    TimeError = soapy.SOAPY_SDR_TIME_ERROR
+    Underflow = soapy.SOAPY_SDR_UNDERFLOW
+
+class SoapyFlag(IntEnum):
+    EndBurst = soapy.SOAPY_SDR_END_BURST
+    HasTime = soapy.SOAPY_SDR_HAS_TIME
+    EndAbrupt = soapy.SOAPY_SDR_END_ABRUPT
+    OnePacket = soapy.SOAPY_SDR_ONE_PACKET
+    MoreFragments = soapy.SOAPY_SDR_MORE_FRAGMENTS
+    WaitTrigger = soapy.SOAPY_SDR_WAIT_TRIGGER