fallback_desktop_capturer_wrapper.h

Enable keyboard shortcuts

/*

 *  Copyright (c) 2017 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 MODULES_DESKTOP_CAPTURE_FALLBACK_DESKTOP_CAPTURER_WRAPPER_H_

#define MODULES_DESKTOP_CAPTURE_FALLBACK_DESKTOP_CAPTURER_WRAPPER_H_

#include <memory>

#include "modules/desktop_capture/desktop_capture_types.h"

#include "modules/desktop_capture/desktop_capturer.h"

#include "modules/desktop_capture/desktop_frame.h"

#include "modules/desktop_capture/desktop_geometry.h"

#include "modules/desktop_capture/shared_memory.h"

namespace webrtc {

// A DesktopCapturer wrapper owns two DesktopCapturer implementations. If the

// main DesktopCapturer fails, it uses the secondary one instead. Two capturers

// are expected to return same SourceList, and the meaning of each SourceId is

// identical, otherwise FallbackDesktopCapturerWrapper may return frames from

// different sources. Using asynchronized DesktopCapturer implementations with

// SharedMemoryFactory is not supported, and may result crash or assertion

// failure.

class FallbackDesktopCapturerWrapper final : public DesktopCapturer,

                                             public DesktopCapturer::Callback {

 public:

  FallbackDesktopCapturerWrapper(

      std::unique_ptr<DesktopCapturer> main_capturer,

      std::unique_ptr<DesktopCapturer> secondary_capturer);

  ~FallbackDesktopCapturerWrapper() override;

  // DesktopCapturer interface.

  void Start(DesktopCapturer::Callback* callback) override;

  void SetSharedMemoryFactory(

      std::unique_ptr<SharedMemoryFactory> shared_memory_factory) override;

  void CaptureFrame() override;

  void SetExcludedWindow(WindowId window) override;

  bool GetSourceList(SourceList* sources) override;

  bool SelectSource(SourceId id) override;

  bool FocusOnSelectedSource() override;

  bool IsOccluded(const DesktopVector& pos) override;

 private:

  // DesktopCapturer::Callback interface.

  void OnCaptureResult(Result result,

                       std::unique_ptr<DesktopFrame> frame) override;

  const std::unique_ptr<DesktopCapturer> main_capturer_;

  const std::unique_ptr<DesktopCapturer> secondary_capturer_;

  std::unique_ptr<SharedMemoryFactory> shared_memory_factory_;

  bool main_capturer_permanent_error_ = false;

  DesktopCapturer::Callback* callback_ = nullptr;

};

}  // namespace webrtc

#endif  // MODULES_DESKTOP_CAPTURE_FALLBACK_DESKTOP_CAPTURER_WRAPPER_H_