fallback_desktop_capturer_wrapper.h (2710B)
1 /* 2 * Copyright (c) 2017 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_FALLBACK_DESKTOP_CAPTURER_WRAPPER_H_ 12 #define MODULES_DESKTOP_CAPTURE_FALLBACK_DESKTOP_CAPTURER_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_memory.h" 21 22 namespace webrtc { 23 24 // A DesktopCapturer wrapper owns two DesktopCapturer implementations. If the 25 // main DesktopCapturer fails, it uses the secondary one instead. Two capturers 26 // are expected to return same SourceList, and the meaning of each SourceId is 27 // identical, otherwise FallbackDesktopCapturerWrapper may return frames from 28 // different sources. Using asynchronized DesktopCapturer implementations with 29 // SharedMemoryFactory is not supported, and may result crash or assertion 30 // failure. 31 class FallbackDesktopCapturerWrapper final : public DesktopCapturer, 32 public DesktopCapturer::Callback { 33 public: 34 FallbackDesktopCapturerWrapper( 35 std::unique_ptr<DesktopCapturer> main_capturer, 36 std::unique_ptr<DesktopCapturer> secondary_capturer); 37 ~FallbackDesktopCapturerWrapper() override; 38 39 // DesktopCapturer interface. 40 void Start(DesktopCapturer::Callback* callback) override; 41 void SetSharedMemoryFactory( 42 std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override; 43 void CaptureFrame() override; 44 void SetExcludedWindow(WindowId window) override; 45 bool GetSourceList(SourceList* sources) override; 46 bool SelectSource(SourceId id) override; 47 bool FocusOnSelectedSource() override; 48 bool IsOccluded(const DesktopVector& pos) override; 49 50 private: 51 // DesktopCapturer::Callback interface. 52 void OnCaptureResult(Result result, 53 std::unique_ptr<DesktopFrame> frame) override; 54 55 const std::unique_ptr<DesktopCapturer> main_capturer_; 56 const std::unique_ptr<DesktopCapturer> secondary_capturer_; 57 std::unique_ptr<SharedMemoryFactory> shared_memory_factory_; 58 bool main_capturer_permanent_error_ = false; 59 DesktopCapturer::Callback* callback_ = nullptr; 60 }; 61 62 } // namespace webrtc 63 64 #endif // MODULES_DESKTOP_CAPTURE_FALLBACK_DESKTOP_CAPTURER_WRAPPER_H_