Feature/CEC detection (#877)

* Add CEC functionality

* Initial commit

* removed libCEC from the system skip list

Co-authored-by: Paulchen Panther <16664240+Paulchen-Panther@users.noreply.github.com>

include/hyperion/Grabber.h

@@ -80,6 +80,11 @@ public:
 	///
 	virtual void setSignalDetectionEnable(bool enable) {}
 
+	///
+	/// @brief Apply CecDetectionEnable (used from v4l)
+	///
+	virtual void setCecDetectionEnable(bool enable) {}
+
 	///
 	/// @brief Apply device and videoStanded (used from v4l)
 	///

include/hyperion/Hyperion.h

@@ -550,6 +550,5 @@ private:
 	/// Boblight instance
 	BoblightServer* _boblightServer;
 
-	/// mutex
 	QMutex _changes;
 };