remoting/host/host_extension_session.h

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef REMOTING_HOST_HOST_EXTENSION_SESSION_H_
   6 #define REMOTING_HOST_HOST_EXTENSION_SESSION_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9
  10 namespace webrtc {
  11 class DesktopCapturer;
  12 }
  13
  14 namespace remoting {
  15
  16 class ClientSessionControl;
  17 class VideoEncoder;
  18
  19 namespace protocol {
  20 class ExtensionMessage;
  21 class ClientStub;
  22 }  // namespace protocol
  23
  24 // Created by an |HostExtension| to store |ClientSession| specific state, and to
  25 // handle extension messages.
  26 class HostExtensionSession {
  27  public:
  28   virtual ~HostExtensionSession() {}
  29
  30   // Optional hook functions for HostExtensions which need to wrap or replace
  31   // parts of the video, audio, input, etc pipelines.
  32   // These are called in response to ResetVideoPipeline().
  33   virtual scoped_ptr<webrtc::DesktopCapturer> OnCreateVideoCapturer(
  34       scoped_ptr<webrtc::DesktopCapturer> capturer);
  35   virtual scoped_ptr<VideoEncoder> OnCreateVideoEncoder(
  36       scoped_ptr<VideoEncoder> encoder);
  37   virtual bool ModifiesVideoPipeline() const;
  38
  39   // Called when the host receives an |ExtensionMessage| for the |ClientSession|
  40   // associated with this |HostExtensionSession|.
  41   // It returns |true| if the message was handled, and |false| otherwise.
  42   virtual bool OnExtensionMessage(
  43       ClientSessionControl* client_session_control,
  44       protocol::ClientStub* client_stub,
  45       const protocol::ExtensionMessage& message) = 0;
  46 };
  47
  48 }  // namespace remoting
  49
  50 #endif  // REMOTING_HOST_HOST_EXTENSION_SESSION_H_