1 files changed, 49 insertions, 0 deletions
diff --git a/webrtc/modules/desktop_capture/shared_desktop_frame.h b/webrtc/modules/desktop_capture/shared_desktop_frame.h
new file mode 100644
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+++ b/webrtc/modules/desktop_capture/shared_desktop_frame.h
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+/*
+ *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
+#define WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
+
+#include "webrtc/base/scoped_ref_ptr.h"
+#include "webrtc/modules/desktop_capture/desktop_frame.h"
+
+namespace webrtc {
+
+// SharedDesktopFrame is a DesktopFrame that may have multiple instances all
+// sharing the same buffer.
+class SharedDesktopFrame : public DesktopFrame {
+ public:
+  virtual ~SharedDesktopFrame();
+
+  static SharedDesktopFrame* Wrap(DesktopFrame* desktop_frame);
+
+  // Returns the underlying instance of DesktopFrame.
+  DesktopFrame* GetUnderlyingFrame();
+
+  // Creates a clone of this object.
+  SharedDesktopFrame* Share();
+
+  // Checks if the frame is currently shared. If it returns false it's
+  // guaranteed that there are no clones of the object.
+  bool IsShared();
+
+ private:
+  class Core;
+
+  SharedDesktopFrame(rtc::scoped_refptr<Core> core);
+
+  rtc::scoped_refptr<Core> core_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(SharedDesktopFrame);
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_