tor-browser

The Tor Browser
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screen_capturer_mac.h (4459B)

      1 /*
      2 *  Copyright (c) 2018 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_MAC_SCREEN_CAPTURER_MAC_H_
     12 #define MODULES_DESKTOP_CAPTURE_MAC_SCREEN_CAPTURER_MAC_H_
     13 
     14 #include <CoreGraphics/CoreGraphics.h>
     15 
     16 #include <memory>
     17 #include <vector>
     18 
     19 #include "api/sequence_checker.h"
     20 #include "modules/desktop_capture/desktop_capture_options.h"
     21 #include "modules/desktop_capture/desktop_capturer.h"
     22 #include "modules/desktop_capture/desktop_frame.h"
     23 #include "modules/desktop_capture/desktop_geometry.h"
     24 #include "modules/desktop_capture/desktop_region.h"
     25 #include "modules/desktop_capture/mac/desktop_configuration.h"
     26 #include "modules/desktop_capture/mac/desktop_configuration_monitor.h"
     27 #include "modules/desktop_capture/mac/desktop_frame_provider.h"
     28 #include "modules/desktop_capture/screen_capture_frame_queue.h"
     29 #include "modules/desktop_capture/screen_capturer_helper.h"
     30 #include "modules/desktop_capture/shared_desktop_frame.h"
     31 
     32 namespace webrtc {
     33 
     34 class DisplayStreamManager;
     35 
     36 // A class to perform video frame capturing for mac.
     37 class ScreenCapturerMac final : public DesktopCapturer {
     38 public:
     39  ScreenCapturerMac(
     40      scoped_refptr<DesktopConfigurationMonitor> desktop_config_monitor,
     41      bool detect_updated_region,
     42      bool allow_iosurface);
     43  ~ScreenCapturerMac() override;
     44 
     45  ScreenCapturerMac(const ScreenCapturerMac&) = delete;
     46  ScreenCapturerMac& operator=(const ScreenCapturerMac&) = delete;
     47 
     48  // TODO(julien.isorce): Remove Init() or make it private.
     49  bool Init();
     50 
     51  // DesktopCapturer interface.
     52  void Start(Callback* callback) override;
     53  void CaptureFrame() override;
     54  void SetExcludedWindow(WindowId window) override;
     55  bool GetSourceList(SourceList* screens) override;
     56  bool SelectSource(SourceId id) override;
     57 
     58 private:
     59  // Returns false if the selected screen is no longer valid.
     60  bool CgBlit(const DesktopFrame& frame, const DesktopRegion& region);
     61 
     62  // Called when the screen configuration is changed.
     63  void ScreenConfigurationChanged();
     64 
     65  bool RegisterRefreshAndMoveHandlers();
     66  void UnregisterRefreshAndMoveHandlers();
     67 
     68  void ScreenRefresh(CGDirectDisplayID display_id,
     69                     CGRectCount count,
     70                     const CGRect* rect_array,
     71                     DesktopVector display_origin,
     72                     IOSurfaceRef io_surface);
     73  void ReleaseBuffers();
     74 
     75  std::unique_ptr<DesktopFrame> CreateFrame();
     76 
     77  const bool detect_updated_region_;
     78 
     79  Callback* callback_ = nullptr;
     80 
     81  // Queue of the frames buffers.
     82  ScreenCaptureFrameQueue<SharedDesktopFrame> queue_;
     83 
     84  // Current display configuration.
     85  MacDesktopConfiguration desktop_config_;
     86 
     87  // Currently selected display, or 0 if the full desktop is selected. On OS X
     88  // 10.6 and before, this is always 0.
     89  CGDirectDisplayID current_display_ = 0;
     90 
     91  // The physical pixel bounds of the current screen.
     92  DesktopRect screen_pixel_bounds_;
     93 
     94  // The dip to physical pixel scale of the current screen.
     95  float dip_to_pixel_scale_ = 1.0f;
     96 
     97  // A thread-safe list of invalid rectangles, and the size of the most
     98  // recently captured screen.
     99  ScreenCapturerHelper helper_;
    100 
    101  // Contains an invalid region from the previous capture.
    102  DesktopRegion last_invalid_region_;
    103 
    104  // Monitoring display reconfiguration.
    105  scoped_refptr<DesktopConfigurationMonitor> desktop_config_monitor_;
    106 
    107  CGWindowID excluded_window_ = 0;
    108 
    109  // List of streams, one per screen.
    110  std::vector<CGDisplayStreamRef> display_streams_;
    111 
    112  // Container holding latest state of the snapshot per displays.
    113  DesktopFrameProvider desktop_frame_provider_;
    114 
    115  // Start, CaptureFrame and destructor have to called in the same thread.
    116  SequenceChecker thread_checker_;
    117 
    118  // Used to force CaptureFrame to update it's screen configuration
    119  // and reregister event handlers. This ensure that this
    120  // occurs on the ScreenCapture thread. Read and written from
    121  // both the VideoCapture thread and ScreenCapture thread.
    122  // Protected by desktop_config_monitor_.
    123  bool update_screen_configuration_ = false;
    124 };
    125 
    126 }  // namespace webrtc
    127 
    128 #endif  // MODULES_DESKTOP_CAPTURE_MAC_SCREEN_CAPTURER_MAC_H_