tor-browser

The Tor Browser
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desktop_capturer_differ_wrapper.h (2837B)

      1 /*
      2 *  Copyright (c) 2016 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 MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_
     12 #define MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_
     13 
     14 #include <memory>
     15 
     16 #include "modules/desktop_capture/desktop_capture_metadata.h"
     17 #include "modules/desktop_capture/desktop_capture_types.h"
     18 #include "modules/desktop_capture/desktop_capturer.h"
     19 #include "modules/desktop_capture/desktop_frame.h"
     20 #include "modules/desktop_capture/desktop_geometry.h"
     21 #include "modules/desktop_capture/shared_desktop_frame.h"
     22 #include "modules/desktop_capture/shared_memory.h"
     23 #include "rtc_base/system/rtc_export.h"
     24 
     25 namespace webrtc {
     26 
     27 // DesktopCapturer wrapper that calculates updated_region() by comparing frames
     28 // content. This class always expects the underlying DesktopCapturer
     29 // implementation returns a superset of updated regions in DestkopFrame. If a
     30 // DesktopCapturer implementation does not know the updated region, it should
     31 // set updated_region() to full frame.
     32 //
     33 // This class marks entire frame as updated if the frame size or frame stride
     34 // has been changed.
     35 class RTC_EXPORT DesktopCapturerDifferWrapper
     36    : public DesktopCapturer,
     37      public DesktopCapturer::Callback {
     38 public:
     39  // Creates a DesktopCapturerDifferWrapper with a DesktopCapturer
     40  // implementation, and takes its ownership.
     41  explicit DesktopCapturerDifferWrapper(
     42      std::unique_ptr<DesktopCapturer> base_capturer);
     43 
     44  ~DesktopCapturerDifferWrapper() override;
     45 
     46  // DesktopCapturer interface.
     47  void Start(DesktopCapturer::Callback* callback) override;
     48  void SetSharedMemoryFactory(
     49      std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override;
     50  void CaptureFrame() override;
     51  void SetExcludedWindow(WindowId window) override;
     52  bool GetSourceList(SourceList* screens) override;
     53  bool SelectSource(SourceId id) override;
     54  bool FocusOnSelectedSource() override;
     55  bool IsOccluded(const DesktopVector& pos) override;
     56 #if defined(WEBRTC_USE_GIO)
     57  DesktopCaptureMetadata GetMetadata() override;
     58 #endif  // defined(WEBRTC_USE_GIO)
     59 private:
     60  // DesktopCapturer::Callback interface.
     61  void OnCaptureResult(Result result,
     62                       std::unique_ptr<DesktopFrame> frame) override;
     63 
     64  const std::unique_ptr<DesktopCapturer> base_capturer_;
     65  DesktopCapturer::Callback* callback_;
     66  std::unique_ptr<SharedDesktopFrame> last_frame_;
     67 };
     68 
     69 }  // namespace webrtc
     70 
     71 #endif  // MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURER_DIFFER_WRAPPER_H_