refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials.Core/Devices/CodecInterfaces.cs

@@ -0,0 +1,46 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+
+namespace PepperDash.Essentials.Core
+{
+    /// <summary>
+    /// Adds control of codec receive volume
+    /// </summary>
+    public interface IReceiveVolume
+    {
+        // Break this out into 3 interfaces
+        void SetReceiveVolume(ushort level);
+        void ReceiveMuteOn();
+        void ReceiveMuteOff();
+        void ReceiveMuteToggle();
+        IntFeedback ReceiveLevelFeedback { get; }
+        BoolFeedback ReceiveMuteIsOnFeedback { get; }
+    }
+
+    /// <summary>
+    /// Adds control of codec transmit volume
+    /// </summary>
+    public interface ITransmitVolume
+    {
+        void SetTransmitVolume(ushort level);
+        void TransmitMuteOn();
+        void TransmitMuteOff();
+        void TransmitMuteToggle();
+        IntFeedback TransmitLevelFeedback { get; }
+        BoolFeedback TransmitMuteIsOnFeedback { get; }
+    }
+
+    /// <summary>
+    /// Adds control of codec privacy function (microphone mute)
+    /// </summary>
+    public interface IPrivacy
+    {
+        void PrivacyModeOn();
+        void PrivacyModeOff();
+        void PrivacyModeToggle();
+        BoolFeedback PrivacyModeIsOnFeedback { get; }
+    }
+}