1 files changed, 37 insertions, 1 deletions

diff --git a/libs/ardour/ardour/control_protocol.h b/libs/ardour/ardour/control_protocol.h
index c0869fad9a..4088e2dd09 100644
--- a/libs/ardour/ardour/control_protocol.h
+++ b/libs/ardour/ardour/control_protocol.h
@@ -16,7 +16,8 @@ class ControlProtocol : sigc::trackable {
 	virtual ~ControlProtocol();
 
 	virtual int init () { return 0; }
-	virtual bool active() const = 0;
+
+	sigc::signal<void> ActiveChanged;
 
 	enum SendWhat {
 		SendRoute,
@@ -26,6 +27,9 @@ class ControlProtocol : sigc::trackable {
 	std::string name() const { return _name; }
 
 	void set_send (SendWhat);
+	void set_active (bool yn);
+	bool get_active() const { return active_thread > 0; }
+
 
 	bool send() const { return _send != 0; }
 	bool send_route_feedback () const { return _send & SendRoute; }
@@ -35,11 +39,43 @@ class ControlProtocol : sigc::trackable {
 	virtual void send_global_feedback () {}
 
   protected:
+
 	ARDOUR::Session& session;
 	SendWhat _send;
 	std::string _name;
+	int active_thread;
+	int thread_request_pipe[2];
+	pthread_t _thread;
+
+	static void* _thread_work (void *);
+	void* thread_work ();
+
+	struct ThreadRequest {
+	    enum Type {
+		    Start,
+		    Stop,
+		    Quit
+	    };
+	};
+
+	int init_thread();
+	int start_thread ();
+	int stop_thread ();
+	void terminate_thread ();
+	int  poke_thread (ThreadRequest::Type);
 };
 
+extern "C" {
+	struct ControlProtocolDescriptor {
+	    const char* name;
+	    void*       ptr;
+	    void*       module;
+	    ControlProtocol* (*initialize)(ControlProtocolDescriptor*,Session*);
+	    void             (*destroy)(ControlProtocolDescriptor*,ControlProtocol*);
+	    
+	};
+}
+
 }
 
 #endif // ardour_control_protocols_h