Creation of the Connection Manager : this new mechanism continuously

checks for the presence of vimix programs in the network neibourhood.
The list of connections can then be used for indentifying streaming
requests and offers.

Streamer.h

@@ -4,9 +4,68 @@
 #include <gst/pbutils/pbutils.h>
 #include <gst/app/gstappsrc.h>
 
+#include "osc/OscReceivedElements.h"
+#include "osc/OscPacketListener.h"
+#include "ip/UdpSocket.h"
+
 #include "NetworkToolkit.h"
 #include "FrameGrabber.h"
 
+class Session;
+
+class StreamingRequestListener : public osc::OscPacketListener {
+
+protected:
+    virtual void ProcessMessage( const osc::ReceivedMessage& m,
+                                 const IpEndpointName& remoteEndpoint );
+};
+
+class Streaming
+{
+    // Private Constructor
+    Streaming();
+    Streaming(Streaming const& copy);            // Not Implemented
+    Streaming& operator=(Streaming const& copy); // Not Implemented
+
+public:
+
+    static Streaming& manager()
+    {
+        // The only instance
+        static Streaming _instance;
+        return _instance;
+    }
+
+    void enable(bool on);
+    void setSession(Session *se);
+
+    typedef struct {
+        std::string client;
+        std::string address;
+        NetworkToolkit::Protocol protocol;
+        int width;
+        int height;
+    } offer;
+
+    void makeOffer(const std::string &client);
+    void retractOffer(offer o);
+
+    void addStream(const std::string &address);
+    void removeStream(const std::string &address);
+
+private:
+
+    std::string hostname_;
+    static void listen();
+    StreamingRequestListener listener_;
+    UdpListeningReceiveSocket *receiver_;
+
+    Session *session_;
+    int width_;
+    int height_;
+    std::vector<offer> offers_;
+};
+
 class VideoStreamer : public FrameGrabber
 {
     // Frame buffer information
@@ -14,6 +73,10 @@ class VideoStreamer : public FrameGrabber
     uint width_;
     uint height_;
 
+    //
+    NetworkToolkit::Protocol protocol_;
+    std::string address_;
+
     // operation
     std::atomic<bool> streaming_;
     std::atomic<bool> accept_buffer_;
@@ -30,7 +93,7 @@ class VideoStreamer : public FrameGrabber
 
 public:
 
-    VideoStreamer();
+    VideoStreamer(Streaming::offer config);
     ~VideoStreamer();
 
     void addFrame(FrameBuffer *frame_buffer, float dt) override;