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