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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 MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
#define MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
#include <memory>
#include "api/scoped_refptr.h"
#include "modules/desktop_capture/desktop_frame.h"
#include "rtc_base/constructor_magic.h"
#include "rtc_base/ref_counted_object.h"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// SharedDesktopFrame is a DesktopFrame that may have multiple instances all
// sharing the same buffer.
class RTC_EXPORT SharedDesktopFrame final : public DesktopFrame {
public:
~SharedDesktopFrame() override;
static std::unique_ptr<SharedDesktopFrame> Wrap(
std::unique_ptr<DesktopFrame> desktop_frame);
// Deprecated.
// TODO(sergeyu): remove this method.
static SharedDesktopFrame* Wrap(DesktopFrame* desktop_frame);
// Deprecated. Clients do not need to know the underlying DesktopFrame
// instance.
// TODO(zijiehe): Remove this method.
// Returns the underlying instance of DesktopFrame.
DesktopFrame* GetUnderlyingFrame();
// Returns whether |this| and |other| share the underlying DesktopFrame.
bool ShareFrameWith(const SharedDesktopFrame& other) const;
// Creates a clone of this object.
std::unique_ptr<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:
typedef rtc::FinalRefCountedObject<std::unique_ptr<DesktopFrame>> Core;
SharedDesktopFrame(rtc::scoped_refptr<Core> core);
const rtc::scoped_refptr<Core> core_;
RTC_DISALLOW_COPY_AND_ASSIGN(SharedDesktopFrame);
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_SHARED_DESKTOP_FRAME_H_
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