add refresh function to consolidate maintenance tasks

protocol/esta/sacn/receiver.cpp

@@ -323,7 +323,7 @@ void Receiver::dataFrameHandler(ACN::PDU::Message<DATA::Pdu> frame)
   universe->DmpReceiver(block);
 
   // do ArbitratingUniverse maintence tasks
-  universes_.at(metadata->universe)->rxRate();
+  universes_.at(metadata->universe)->refresh();
 }
 
 

protocol/esta/sacn/universearbitrator.cpp

@@ -41,6 +41,16 @@ UniverseArbitrator::UniverseArbitrator()
 }
 
 
+/**
+ * @brief UniverseArbitrator::refresh
+ */
+void UniverseArbitrator::refresh()
+{
+  purge_stale_sources_();
+  find_dominant_();
+}
+
+
 /**
  * @brief UniverseArbitrator::setHoldLastLook
  * @param state
@@ -268,8 +278,7 @@ uint8_t UniverseArbitrator::slot(const uint16_t address) const
  */
 double UniverseArbitrator::rxRate()
 {
-  purge_stale_sources_();
-  find_dominant_();
+  refresh();
   auto universe = m_dominant.lock();
   if (!universe)
     return 0.0;

protocol/esta/sacn/universearbitrator.h

@@ -58,6 +58,7 @@ public:
     explicit UniverseArbitrator();
 
     uint16_t expectedUniverse; ///< Expected universe number
+    void refresh();
 
     // Source universes:
     void deleteSourceUniverse(const DATA::data_header&);