usm: Always encrypt ADX audio when USMBuilder has a key

Author: mos9527

PyCriCodecsEx/adx.py

@@ -116,7 +116,7 @@ def generate_SFA(self, index: int, builder):
                     0
                     )
             chunk_data = self.sfaStream.read(datalen)
-            if builder.encrypt_audio:
+            if builder.usm_key:
                 SFA_chunk = builder.AudioMask(chunk_data)
             SFA_chunk += chunk_data.ljust(datalen + padding, b"\x00")            
             current_interval += self.CHUNK_INTERVAL

PyCriCodecsEx/usm.py

@@ -571,6 +571,9 @@ def __init__(
         Note:
             For USM with key set, HCA audio streams *usually* use the same key for encryption.
             Thus when adding HCA audio streams, make sure your HCACodec is initialized with a key itself.
+
+            For ADXCodec, this will be ALWAYS encrypted if the USMBuilder is initialized with a key. No
+            further configuration is needed.
         """
         if key:
             self.init_key(key)