Fixes StartSharing() method in CiscoSparkCodec to only execute if the PresentationSource is > 0

Fixes ecs-612 by adding property to UsageTracking object to determing if the usage tracker is already running.

Essentials Core/PepperDashEssentialsBase/Devices/IUsageTracking.cs

@@ -27,6 +27,8 @@ namespace PepperDash.Essentials.Core
         public InUseTracking InUseTracker { get; protected set; }
 
         public bool UsageIsTracked { get; set; }
+
+        public bool UsageTrackingStarted { get; protected set; }
         public DateTime UsageStartTime { get; protected set; }
         public DateTime UsageEndTime { get; protected set; }
 
@@ -59,6 +61,7 @@ namespace PepperDash.Essentials.Core
         /// </summary>
         public void StartDeviceUsage()
         {
+            UsageTrackingStarted = true;
             UsageStartTime = DateTime.Now;
         }
 
@@ -69,6 +72,8 @@ namespace PepperDash.Essentials.Core
         {
             try
             {
+                UsageTrackingStarted = false;
+
                 UsageEndTime = DateTime.Now;
 
                 if (UsageStartTime != null)

Essentials Devices Common/Essentials Devices Common/VideoCodec/CiscoCodec/CiscoSparkCodec.cs

@@ -1026,7 +1026,8 @@ namespace PepperDash.Essentials.Devices.Common.VideoCodec.Cisco
             else
                 sendingMode = "LocalOnly";
 
-            SendText(string.Format("xCommand Presentation Start PresentationSource: {0} SendingMode: {1}", PresentationSource, sendingMode));
+            if(PresentationSource > 0)
+                SendText(string.Format("xCommand Presentation Start PresentationSource: {0} SendingMode: {1}", PresentationSource, sendingMode));
         }
 
         /// <summary>

Essentials Devices Common/Essentials Devices Common/VideoCodec/VideoCodecBase.cs

@@ -43,10 +43,19 @@ namespace PepperDash.Essentials.Devices.Common.VideoCodec
 
         public RoutingPortCollection<RoutingOutputPort> OutputPorts { get; private set; }
 
+        bool wasIsInCall;
+
         /// <summary>
         /// Returns true when any call is not in state Unknown, Disconnecting, Disconnected
         /// </summary>
-        public bool IsInCall { get { return ActiveCalls.Any(c => c.IsActiveCall); } }
+        public bool IsInCall 
+        { 
+            get
+            {
+                var value = ActiveCalls.Any(c => c.IsActiveCall);
+                return value; 
+            } 
+        }
 
         public BoolFeedback StandbyIsOnFeedback { get; private set; }
 
@@ -131,6 +140,11 @@ namespace PepperDash.Essentials.Devices.Common.VideoCodec
 
             if (AutoShareContentWhileInCall)
                 StartSharing();
+
+            if(IsInCall && !UsageTracker.UsageTrackingStarted)
+                UsageTracker.StartDeviceUsage();
+            else if(UsageTracker.UsageTrackingStarted && !IsInCall)
+                UsageTracker.EndDeviceUsage();
         }
 
         /// <summary>