| /* |
| * Copyright (c) 2016 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 WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |
| #define WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |
| |
| #include <memory> |
| |
| #include "webrtc/modules/desktop_capture/screen_capturer.h" |
| #include "webrtc/modules/desktop_capture/shared_desktop_frame.h" |
| |
| namespace webrtc { |
| |
| // ScreenCapturer wrapper that calculates updated_region() by comparing frames |
| // content. This class always expects the underlying ScreenCapturer |
| // implementation returns a superset of updated regions in DestkopFrame. If a |
| // ScreenCapturer implementation does not know the updated region, it should |
| // set updated_region() to full frame. |
| // |
| // This class marks entire frame as updated if the frame size or frame stride |
| // has been changed. |
| class ScreenCapturerDifferWrapper : public ScreenCapturer, |
| public DesktopCapturer::Callback { |
| public: |
| // Creates a ScreenCapturerDifferWrapper with a ScreenCapturer implementation, |
| // and takes its ownership. |
| explicit ScreenCapturerDifferWrapper( |
| std::unique_ptr<ScreenCapturer> base_capturer); |
| ~ScreenCapturerDifferWrapper() override; |
| |
| // ScreenCapturer interface. |
| void Start(DesktopCapturer::Callback* callback) override; |
| void SetSharedMemoryFactory( |
| std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override; |
| void Capture(const DesktopRegion& region) override; |
| bool GetScreenList(ScreenList* screens) override; |
| bool SelectScreen(ScreenId id) override; |
| |
| private: |
| // DesktopCapturer::Callback interface. |
| void OnCaptureResult(Result result, |
| std::unique_ptr<DesktopFrame> frame) override; |
| |
| const std::unique_ptr<ScreenCapturer> base_capturer_; |
| DesktopCapturer::Callback* callback_; |
| std::unique_ptr<SharedDesktopFrame> last_frame_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |