Implement video frame acknowledgements in the chromoting protocol.

remoting/protocol/connection_to_client.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 #define REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_
 
 #include <deque>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/synchronization/lock.h"
 #include "base/threading/non_thread_safe.h"
 #include "remoting/protocol/audio_writer.h"
 #include "remoting/protocol/session.h"
 
 namespace remoting {
 namespace protocol {
 
 class ClientStub;
 class ClipboardStub;
 class HostControlDispatcher;
 class HostEventDispatcher;
 class HostStub;
 class HostVideoDispatcher;
 class InputStub;
+class VideoFeedbackStub;
 class VideoStub;
 
 // This class represents a remote viewer connection to the chromoting
 // host. It sets up all protocol channels and connects them to the
 // stubs.
 class ConnectionToClient : public base::NonThreadSafe,
                            public Session::EventHandler,
                            public ChannelDispatcherBase::EventHandler {
  public:
   class EventHandler {
@@ skipping 53 matching lines @@
   virtual VideoStub* video_stub();
   virtual AudioStub* audio_stub();
   virtual ClientStub* client_stub();
 
   // Set the stubs which will handle messages we receive from the client. These
   // must be called in EventHandler::OnConnectionAuthenticated().
   virtual void set_clipboard_stub(ClipboardStub* clipboard_stub);
   virtual void set_host_stub(HostStub* host_stub);
   virtual void set_input_stub(InputStub* input_stub);
 
+  // Sets video feedback stub. Can be called at any time after connection is
+  // authenticated.
+  virtual void set_video_feedback_stub(VideoFeedbackStub* video_feedback_stub);
+
   // Session::EventHandler interface.
   void OnSessionStateChange(Session::State state) override;
   void OnSessionRouteChange(const std::string& channel_name,
                             const TransportRoute& route) override;
 
   // ChannelDispatcherBase::EventHandler interface.
   void OnChannelInitialized(ChannelDispatcherBase* channel_dispatcher) override;
   void OnChannelError(ChannelDispatcherBase* channel_dispatcher,
                       ErrorCode error) override;
 
@@ skipping 16 matching lines @@
   scoped_ptr<HostVideoDispatcher> video_dispatcher_;
   scoped_ptr<AudioWriter> audio_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionToClient);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CONNECTION_TO_CLIENT_H_