1.1.17 - Add MQTT volume scaling for Home Assistant media player

OmniLinkBridge/Global.cs

@@ -62,6 +62,7 @@ namespace OmniLinkBridge
         public static ConcurrentDictionary<int, MQTT.OverrideUnit> mqtt_discovery_override_unit;
         public static Type mqtt_discovery_button_type;
         public static bool mqtt_audio_local_mute;
+        public static bool mqtt_audio_volume_media_player;
 
         // Notifications
         public static bool notify_area;

OmniLinkBridge/MQTT/HomeAssistant/Number.cs

@@ -16,5 +16,8 @@ namespace OmniLinkBridge.MQTT.HomeAssistant
 
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public int? max { get; set; }
+
+        [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
+        public double? step { get; set; }
     }
 }

OmniLinkBridge/MQTT/MappingExtensions.cs

@@ -726,13 +726,27 @@ namespace OmniLinkBridge.MQTT
                 icon = "mdi:volume-low",
                 state_topic = audioZone.ToTopic(Topic.volume_state),
                 command_topic = audioZone.ToTopic(Topic.volume_command),
+                min = 0,
+                max = 100,
+                step = 1,
             };
+
+            if(Global.mqtt_audio_volume_media_player)
+            {
+                ret.min = 0;
+                ret.max = 1;
+                ret.step = 0.01;
+            }
+
             return ret;
         }
 
-        public static int ToVolumeState(this clsAudioZone audioZone)
+        public static double ToVolumeState(this clsAudioZone audioZone)
         {
-            return audioZone.Volume;
+            if (Global.mqtt_audio_volume_media_player)
+                return audioZone.Volume * 0.01;
+            else
+                return audioZone.Volume;
         }
     }
 }

OmniLinkBridge/MQTT/MessageProcessor.cs

@@ -397,9 +397,17 @@ namespace OmniLinkBridge.MQTT
 
                 OmniLink.SendCommand(enuUnitCommand.AudioSource, (byte)source, (ushort)audioZone.Number);
             }
-            else if (command == Topic.volume_command && int.TryParse(payload, out int volume))
+            else if (command == Topic.volume_command && double.TryParse(payload, out double volume))
             {
-                log.Debug("SetAudioVolume: {id} to {value}", audioZone.Number, payload);
+                if (Global.mqtt_audio_volume_media_player)
+                    volume *= 100;
+
+                if (volume > 100)
+                    volume = 100;
+                else if (volume < 0)
+                    volume = 0;
+
+                log.Debug("SetAudioVolume: {id} to {value}", audioZone.Number, volume);
 
                 OmniLink.SendCommand(enuUnitCommand.AudioVolume, (byte)volume, (ushort)audioZone.Number);
             }

OmniLinkBridge/OmniLinkBridge.ini

@@ -70,10 +70,13 @@ mqtt_discovery_area_code_required =
 #mqtt_discovery_override_unit = id=1;type=switch
 #mqtt_discovery_override_unit = id=395;type=number
 # Publish buttons as this Home Assistant device type
-# must be button or switch (previous behavior)
+# must be button (recommended) or switch (default, previous behavior)
-#mqtt_discovery_button_type = button
+mqtt_discovery_button_type = switch
 # Handle mute locally by setting volume to 0 and restoring to previous value
 mqtt_audio_local_mute = no
+# Change audio volume scaling for Home Assistant media player
+# yes 0.00-1.00, no 0-100 (default, previous behavior)
+mqtt_audio_volume_media_player = no
 
 # Notifications (yes/no)
 # Always sent for area alarms and critical system events

OmniLinkBridge/Properties/AssemblyInfo.cs

@@ -32,5 +32,5 @@ using System.Runtime.InteropServices;
 // You can specify all the values or you can default the Build and Revision Numbers 
 // by using the '*' as shown below:
 // [assembly: AssemblyVersion("1.0.*")]
-[assembly: AssemblyVersion("1.1.16.0")]
+[assembly: AssemblyVersion("1.1.17.0")]
-[assembly: AssemblyFileVersion("1.1.16.0")]
+[assembly: AssemblyFileVersion("1.1.17.0")]

OmniLinkBridge/Settings.cs

@@ -93,6 +93,7 @@ namespace OmniLinkBridge
                 Global.mqtt_discovery_override_unit = settings.LoadOverrideUnit<MQTT.OverrideUnit>("mqtt_discovery_override_unit");
                 Global.mqtt_discovery_button_type = settings.ValidateType("mqtt_discovery_button_type", typeof(Switch), typeof(Button));
                 Global.mqtt_audio_local_mute = settings.ValidateBool("mqtt_audio_local_mute");
+                Global.mqtt_audio_volume_media_player = settings.ValidateBool("mqtt_audio_volume_media_player");
             }
 
             // Notifications

OmniLinkBridgeTest/MQTTTest.cs

@@ -433,6 +433,12 @@ namespace OmniLinkBridgeTest
             check(1, "75", enuUnitCommand.AudioVolume, 75);
 
             check(2, "0", enuUnitCommand.AudioVolume, 0);
+
+            Global.mqtt_audio_volume_media_player = true;
+
+            check(2, "1", enuUnitCommand.AudioVolume, 100);
+            check(2, "0.75", enuUnitCommand.AudioVolume, 75);
+            check(2, "0", enuUnitCommand.AudioVolume, 0);
         }
     }
 }

README.md

@@ -355,6 +355,7 @@ note Refer to omnilink/sourceXX/name
 SUB omnilink/audioXX/volume_state
 PUB omnilink/audioXX/volume_command
 int Level from 0 to 100 percent
+double Level from 0.00 to 1.00 (mqtt_audio_volume_media_player = yes)
 ```
 
 ## Web API