restore DRM functionality

owrx/drm.py

@@ -0,0 +1,14 @@
+from csdr.module import PopenModule
+from pycsdr.types import Format
+
+
+class DrmModule(PopenModule):
+    def getInputFormat(self) -> Format:
+        return Format.COMPLEX_FLOAT
+
+    def getOutputFormat(self) -> Format:
+        return Format.SHORT
+
+    def getCommand(self):
+        # dream -c 6 --sigsrate 48000 --audsrate 48000 -I - -O -
+        return ["dream", "-c", "6", "--sigsrate", "48000", "--audsrate", "48000", "-I", "-", "-O", "-"]

owrx/dsp.py

@@ -13,6 +13,7 @@ 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.m17 import M17Chain
+from csdr.chain.drm import Drm
 from csdr.chain.fft import FftChain
 from csdr.chain.digimodes import AudioChopperDemodulator, PacketDemodulator, PocsagDemodulator
 from pycsdr.modules import Buffer, Writer
@@ -444,6 +445,8 @@ class DspManager(Output, SdrSourceEventClient):
             return Nxdn(self.props["digital_voice_codecserver"])
         elif demod == "m17":
             return M17Chain()
+        elif demod == "drm":
+            return Drm()
 
     def setDemodulator(self, mod):
         demodulator = self._getDemodulator(mod)

owrx/m17.py

@@ -1,42 +1,13 @@
-from csdr.module import AutoStartModule
+from csdr.module import PopenModule
 from pycsdr.types import Format
-from subprocess import Popen, PIPE
-import threading
 
 
-class M17Module(AutoStartModule):
-    def __init__(self):
-        self.process = None
-        super().__init__()
-
+class M17Module(PopenModule):
     def getInputFormat(self) -> Format:
         return Format.SHORT
 
     def getOutputFormat(self) -> Format:
         return Format.SHORT
 
-    def start(self):
-        self.process = Popen(["m17-demod"], stdin=PIPE, stdout=PIPE)
-        threading.Thread(target=self.pump(self.reader.read, self.process.stdin.write)).start()
-        threading.Thread(target=self.pump(self.process.stdout.read, self.writer.write)).start()
-
-    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
+    def getCommand(self):
+        return ["m17-demod"]