implement DRM mode with dream

csdr/csdr.py

@@ -249,6 +249,10 @@ class dsp(object):
                 "csdr agc_s16 --max 30 --initial 3",
                 "sox -t raw -r 8000 -e signed-integer -b 16 -c 1 --buffer 32 - -t raw -r {output_rate} -e signed-integer -b 16 -c 1 - ",
             ]
+        elif self.isDrm(which):
+            chain += last_decimation_block
+            chain += ["csdr convert_f_s16"]
+            chain += ["dream -c 6 --sigsrate 48000 -w test.wav -I - -O -"]
         elif which == "ssb":
             chain += ["csdr realpart_cf"]
             chain += last_decimation_block
@@ -534,7 +538,7 @@ class dsp(object):
         return self.hd_output_rate
 
     def get_audio_rate(self):
-        if self.isDigitalVoice() or self.isPacket() or self.isPocsag():
+        if self.isDigitalVoice() or self.isPacket() or self.isPocsag() or self.isDrm():
             return 48000
         elif self.isWsjtMode() or self.isJs8():
             return 12000
@@ -577,7 +581,12 @@ class dsp(object):
     def isHdAudio(self, demodulator=None):
         if demodulator is None:
             demodulator = self.get_demodulator()
-        return demodulator == "wfm"
+        return demodulator in ["wfm", "drm"]
+
+    def isDrm(self, demodulator=None):
+        if demodulator is None:
+            demodulator = self.get_demodulator()
+        return demodulator == "drm"
 
     def set_output_rate(self, output_rate):
         if self.output_rate == output_rate:

owrx/feature.py

@@ -45,6 +45,7 @@ class FeatureDetector(object):
         "packet": ["direwolf", "sox"],
         "pocsag": ["digiham", "sox"],
         "js8call": ["js8", "sox"],
+        "drm": ["dream"],
     }
 
     def feature_availability(self):
@@ -435,3 +436,6 @@ class FeatureDetector(object):
         You can find the codec2 source code [here](https://github.com/drowe67/codec2).
         """
         return self.command_is_runnable("freedv_rx")
+
+    def has_dream(self):
+        return self.command_is_runnable("dream")

owrx/modes.py

@@ -50,6 +50,7 @@ class Modes(object):
         AnalogMode("nxdn", "NXDN", bandpass=Bandpass(-3250, 3250), requirements=["digital_voice_dsd"], squelch=False),
         AnalogMode("ysf", "YSF", bandpass=Bandpass(-4000, 4000), requirements=["digital_voice_digiham"], squelch=False),
         AnalogMode("freedv", "FreeDV", bandpass=Bandpass(300, 3000), requirements=["digital_voice_freedv"], squelch=False),
+        AnalogMode("drm", "DRM", bandpass=Bandpass(-5000, 5000), requirements=["drm"], squelch=False),
         DigitalMode("bpsk31", "BPSK31", underlying=["usb"]),
         DigitalMode("bpsk63", "BPSK63", underlying=["usb"]),
         DigitalMode("ft8", "FT8", underlying=["usb"], requirements=["wsjt-x"], service=True),