1/*
2 *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
12#define WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
13
14#include "webrtc/modules/desktop_capture/desktop_frame.h"
15#include "webrtc/system_wrappers/interface/scoped_refptr.h"
16
17namespace webrtc {
18
19// SharedDesktopFrame is a DesktopFrame that may have multiple instances all
20// sharing the same buffer.
21class SharedDesktopFrame : public DesktopFrame {
22 public:
23  virtual ~SharedDesktopFrame();
24
25  static SharedDesktopFrame* Wrap(DesktopFrame* desktop_frame);
26
27  // Returns the underlying instance of DesktopFrame.
28  DesktopFrame* GetUnderlyingFrame();
29
30  // Creates a clone of this object.
31  SharedDesktopFrame* Share();
32
33  // Checks if the frame is currently shared. If it returns false it's
34  // guaranteed that there are no clones of the object.
35  bool IsShared();
36
37 private:
38  class Core;
39
40  SharedDesktopFrame(scoped_refptr<Core> core);
41
42  scoped_refptr<Core> core_;
43
44  DISALLOW_COPY_AND_ASSIGN(SharedDesktopFrame);
45};
46
47}  // namespace webrtc
48
49#endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
50