pack the client audio processing into its own chain

csdr/chain/am.py

@@ -12,7 +12,6 @@ class Am(Chain):
             AmDemod(),
             DcBlock(),
             agc,
-            Convert(Format.FLOAT, Format.SHORT),
         ]
 
         super().__init__(*workers)

csdr/chain/clientaudio.py

@@ -0,0 +1,14 @@
+from csdr.chain import Chain
+from pycsdr.modules import AudioResampler, Convert, AdpcmEncoder
+from pycsdr.types import Format
+
+
+class ClientAudioChain(Chain):
+    def __init__(self, inputRate: int, clientRate: int, compression: str):
+        workers = []
+        if inputRate != clientRate:
+            workers += [AudioResampler(inputRate, clientRate)]
+        workers += [Convert(Format.FLOAT, Format.SHORT)]
+        if compression == "adpcm":
+            workers += [AdpcmEncoder()]
+        super().__init__(*workers)

csdr/chain/fm.py

@@ -13,6 +13,5 @@ class Fm(Chain):
             Limit(),
             NfmDeemphasis(sampleRate),
             agc,
-            Convert(Format.FLOAT, Format.SHORT),
         ]
         super().__init__(*workers)

csdr/chain/ssb.py

@@ -10,7 +10,6 @@ class Ssb(Chain):
             # empty chain as placeholder for the "last decimation"
             Chain(),
             Agc(Format.FLOAT),
-            Convert(Format.FLOAT, Format.SHORT),
         ]
         super().__init__(*workers)