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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/base/scoped_ref_ptr.h"
15 #include "webrtc/modules/desktop_capture/desktop_frame.h"
16 
17 namespace webrtc {
18 
19 // SharedDesktopFrame is a DesktopFrame that may have multiple instances all
20 // sharing the same buffer.
21 class 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(rtc::scoped_refptr<Core> core);
41 
42   rtc::scoped_refptr<Core> core_;
43 
44   RTC_DISALLOW_COPY_AND_ASSIGN(SharedDesktopFrame);
45 };
46 
47 }  // namespace webrtc
48 
49 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
50