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| 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 WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |
| 12 #define WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |
| 13 |
| 14 #include <memory> |
| 15 |
| 16 #include "webrtc/modules/desktop_capture/screen_capturer.h" |
| 17 #include "webrtc/modules/desktop_capture/shared_desktop_frame.h" |
| 18 |
| 19 namespace webrtc { |
| 20 |
| 21 // ScreenCapturer wrapper that calculates updated_region() by comparing frames |
| 22 // content. This class always expects the underlying ScreenCapturer |
| 23 // implementation returns a superset of updated regions in DestkopFrame. If a |
| 24 // ScreenCapturer implementation does not know the updated region, it should |
| 25 // set updated_region() to full frame. |
| 26 // |
| 27 // This class marks entire frame as updated if the frame size or frame stride |
| 28 // has been changed. |
| 29 class ScreenCapturerDifferWrapper : public ScreenCapturer, |
| 30 public DesktopCapturer::Callback { |
| 31 public: |
| 32 // Creates a ScreenCapturerDifferWrapper with a ScreenCapturer implementation, |
| 33 // and takes its ownership. |
| 34 explicit ScreenCapturerDifferWrapper( |
| 35 std::unique_ptr<ScreenCapturer> base_capturer); |
| 36 ~ScreenCapturerDifferWrapper() override; |
| 37 |
| 38 // ScreenCapturer interface. |
| 39 void Start(DesktopCapturer::Callback* callback) override; |
| 40 void SetSharedMemoryFactory( |
| 41 std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override; |
| 42 void Capture(const DesktopRegion& region) override; |
| 43 bool GetScreenList(ScreenList* screens) override; |
| 44 bool SelectScreen(ScreenId id) override; |
| 45 |
| 46 private: |
| 47 // DesktopCapturer::Callback interface. |
| 48 void OnCaptureResult(Result result, |
| 49 std::unique_ptr<DesktopFrame> frame) override; |
| 50 |
| 51 const std::unique_ptr<ScreenCapturer> base_capturer_; |
| 52 DesktopCapturer::Callback* callback_; |
| 53 std::unique_ptr<SharedDesktopFrame> last_frame_; |
| 54 }; |
| 55 |
| 56 } // namespace webrtc |
| 57 |
| 58 #endif // WEBRTC_MODULES_DESKTOP_CAPTURE_SCREEN_CAPTURER_DIFFER_WRAPPER_H_ |
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