Making DesktopEnvironment a factory class used by ClientSession to create audio/video capturers and…

remoting/host/local_desktop_environment.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_HOST_LOCAL_DESKTOP_ENVIRONMENT_H_
+#define REMOTING_HOST_LOCAL_DESKTOP_ENVIRONMENT_H_
+
+#include "remoting/host/desktop_environment.h"
+
+#include "base/basictypes.h"
+#include "base/bind.h"
+#include "base/callback.h"
+
+namespace remoting {
+
+// Used to create audio/video capturers and event executor that work with
+// the local console.

[Wez, 2013/01/11 02:23:41]

nit: Really want to distinguish this from SessionEventExecutor, which is
designed to remote the current desktop environment even across desktop switches,
unless this class.

[alexeypa (please no reviews), 2013/01/11 19:59:46]

This is coming in a follow up CL.

[Wez, 2013/01/12 01:58:06]

Great. :)

[alexeypa (please no reviews), 2013/01/14 20:43:09]

Included into this CL because of other DE/DEF changes.

+class LocalDesktopEnvironment : public DesktopEnvironment {

[Wez, 2013/01/11 02:23:41]

Not keen on this name, but I can't think of a better one right now. :(

[alexeypa (please no reviews), 2013/01/11 19:59:46]

Me neither.

[Wez, 2013/01/12 01:58:06]

BasicDesktopEnvironment, perhaps?  "local" would equally apply to the
desktop-switching version, SessionDesktopEnvironment[Factory], so at least
"basic" conveys the fact that it does just the basic capture & injection...

[alexeypa (please no reviews), 2013/01/14 20:43:09]

BasicDesktopEnvironment

+ public:
+  // Callback prototype that is invoked to create an instance of the event
+  // executor.
+  typedef base::Callback<scoped_ptr<EventExecutor>(
+      scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner)>
+      CreateEventExecutorCallback;
+
+  LocalDesktopEnvironment(
+      scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner,
+      const CreateEventExecutorCallback& create_event_executor_callback);
+  virtual ~LocalDesktopEnvironment();
+
+  // DesktopEnvironment implementation.
+  virtual scoped_ptr<AudioCapturer> CreateAudioCapturer(
+      scoped_refptr<base::SingleThreadTaskRunner> audio_task_runner) OVERRIDE;
+  virtual scoped_ptr<EventExecutor> CreateEventExecutor(
+      scoped_refptr<base::SingleThreadTaskRunner> input_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner) OVERRIDE;
+  virtual scoped_ptr<VideoFrameCapturer> CreateVideoCapturer(
+      scoped_refptr<base::SingleThreadTaskRunner> capture_task_runner,
+      scoped_refptr<base::SingleThreadTaskRunner> encode_task_runner) OVERRIDE;
+
+ private:
+  // Task runner on which public methods of this class should be called.
+  scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
+
+  // Invoked create an instance of the event executor.
+  CreateEventExecutorCallback create_event_executor_callback_;
+
+  // Flags used to make sure that the audio and video capturer are created
+  // only once.
+  bool audio_capturer_created_;
+  bool video_capturer_created_;
+
+  DISALLOW_COPY_AND_ASSIGN(LocalDesktopEnvironment);
+};
+
+}  // namespace remoting
+
+#endif  // REMOTING_HOST_LOCAL_DESKTOP_ENVIRONMENT_H_