a7567a9481
Wrapper pattern is widely used in DesktopCapturer implementations. So this change adds DesktopCapturerWrapper and CaptureResultDesktopCapturerWrapper as the base classes of other wrappers. Implementing a new wrapper should become easy, the implementation does not need to care about the uninteresting overrides. Bug: chromium:764258 Change-Id: If91c1b5e778805906f7f77854ea5600aa61bf64a Reviewed-on: https://webrtc-review.googlesource.com/1420 Commit-Queue: Zijie He <zijiehe@google.com> Reviewed-by: Jamie Walch <jamiewalch@chromium.org> Cr-Commit-Position: refs/heads/master@{#19868}
65 lines
2.1 KiB
C++
65 lines
2.1 KiB
C++
/*
|
|
* 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_CAPTURE_RESULT_DESKTOP_CAPTURER_WRAPPER_H_
|
|
#define MODULES_DESKTOP_CAPTURE_CAPTURE_RESULT_DESKTOP_CAPTURER_WRAPPER_H_
|
|
|
|
#include <memory>
|
|
|
|
#include "modules/desktop_capture/desktop_capturer.h"
|
|
#include "modules/desktop_capture/desktop_capturer_wrapper.h"
|
|
|
|
namespace webrtc {
|
|
|
|
// A DesktopCapturerWrapper implementation to capture the result of
|
|
// |base_capturer|. Derived classes are expected to provide a ResultObserver
|
|
// implementation to observe the DesktopFrame returned by |base_capturer_|.
|
|
class CaptureResultDesktopCapturerWrapper
|
|
: public DesktopCapturerWrapper,
|
|
public DesktopCapturer::Callback {
|
|
public:
|
|
using Callback = DesktopCapturer::Callback;
|
|
|
|
// Provides a way to let derived classes or clients to modify the result
|
|
// returned by |base_capturer_|.
|
|
class ResultObserver {
|
|
public:
|
|
ResultObserver();
|
|
virtual ~ResultObserver();
|
|
|
|
virtual void Observe(Result* result,
|
|
std::unique_ptr<DesktopFrame>* frame) = 0;
|
|
};
|
|
|
|
// |observer| must outlive this instance and can be |this|. |observer| is
|
|
// guaranteed to be executed only after the constructor and before the
|
|
// destructor.
|
|
CaptureResultDesktopCapturerWrapper(
|
|
std::unique_ptr<DesktopCapturer> base_capturer,
|
|
ResultObserver* observer);
|
|
|
|
~CaptureResultDesktopCapturerWrapper() override;
|
|
|
|
// DesktopCapturer implementations.
|
|
void Start(Callback* callback) final;
|
|
|
|
private:
|
|
// DesktopCapturer::Callback implementation.
|
|
void OnCaptureResult(Result result,
|
|
std::unique_ptr<DesktopFrame> frame) final;
|
|
|
|
ResultObserver* const observer_;
|
|
Callback* callback_ = nullptr;
|
|
};
|
|
|
|
} // namespace webrtc
|
|
|
|
#endif // MODULES_DESKTOP_CAPTURE_CAPTURE_RESULT_DESKTOP_CAPTURER_WRAPPER_H_
|