Add support sound mode boolean

denonavr/denonavr.py

@@ -242,6 +242,7 @@ def __init__(self, host, name=None, show_all_inputs=False, timeout=2.0,
         self._input_func_list_rev = {}
         self._sound_mode_raw = None
         self._sound_mode_dict = SOUND_MODE_MAPPING
+        self._support_sound_mode = None
         self._sm_match_dict = self.construct_sm_match_dict()
         self._netaudio_func_list = []
         self._playing_func_list = []
@@ -264,6 +265,8 @@ def __init__(self, host, name=None, show_all_inputs=False, timeout=2.0,
             self._get_zone_name()
         else:
             self._get_receiver_name()
+        # Determine if sound mode is supported
+        self._get_support_sound_mode()
         # Get initial setting of values
         self.update()
         # Create instances of additional zones if requested
@@ -399,7 +402,7 @@ def _update_avr(self):
                          "MasterVolume": None}
 
         # Sound mode information only available in main zone
-        if self._zone == "Main":
+        if (self._zone == "Main" and self._support_sound_mode):
             relevant_tags["selectSurround"] = None
             relevant_tags["SurrMode"] = None
 
@@ -682,6 +685,46 @@ def _get_zone_name(self):
                 else:
                     self._name = name.strip()
 
+    def _get_support_sound_mode(self):
+        """
+        Get if sound mode is supported from device.
+
+        Method queries device via HTTP.
+        Returns "True" if sound mode supported and "False" if not.
+        This method is for pre 2016 AVR(-X) devices
+        """
+        # Set sound mode tags to be checked if available
+        relevant_tags = {"selectSurround": None, "SurrMode": None}
+
+        # Get status XML from Denon receiver via HTTP
+        try:
+            root = self.get_status_xml(self._urls.status)
+        except (ValueError, requests.exceptions.RequestException):
+            pass
+        else:
+            # Process the tags from this XML
+            relevant_tags = self._get_status_from_xml_tags(root, relevant_tags)
+
+        # Second option to update variables from different source
+        if relevant_tags:
+            try:
+                root = self.get_status_xml(self._urls.mainzone)
+            except (ValueError,
+                    requests.exceptions.RequestException):
+                pass
+            else:
+                # Get the tags from this XML
+                relevant_tags = self._get_status_from_xml_tags(root,
+                                                               relevant_tags)
+
+        # if sound mode not found in the status XML, return False
+        if relevant_tags:
+            self._support_sound_mode = False
+            return False
+        # if sound mode found, the relevant_tags are empty: return True.
+        self._support_sound_mode = True
+        return True
+
     def _get_renamed_deleted_sources(self):
         """
         Get renamed and deleted sources lists from receiver .
@@ -1172,6 +1215,11 @@ def input_func_list(self):
         """Return a list of available input sources as string."""
         return sorted(self._input_func_list.keys())
 
+    @property
+    def support_sound_mode(self):
+        """Return Boolean if sound mode supported."""
+        return self._get_support_sound_mode()
+
     @property
     def sound_mode(self):
         """Return the matched current sound mode as a string."""