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/*
* Copyright (c) 2014 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_CROPPING_WINDOW_CAPTURER_H_
#define MODULES_DESKTOP_CAPTURE_CROPPING_WINDOW_CAPTURER_H_
#include <memory>
#include "modules/desktop_capture/desktop_capture_options.h"
#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"
#include "rtc_base/system/rtc_export.h"
namespace webrtc {
// WindowCapturer implementation that uses a screen capturer to capture the
// whole screen and crops the video frame to the window area when the captured
// window is on top.
class RTC_EXPORT CroppingWindowCapturer : public DesktopCapturer,
public DesktopCapturer::Callback {
public:
static std::unique_ptr<DesktopCapturer> CreateCapturer(
const DesktopCaptureOptions& options);
~CroppingWindowCapturer() override;
// DesktopCapturer implementation.
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;
// DesktopCapturer::Callback implementation, passed to `screen_capturer_` to
// intercept the capture result.
void OnCaptureResult(DesktopCapturer::Result result,
std::unique_ptr<DesktopFrame> frame) override;
protected:
explicit CroppingWindowCapturer(const DesktopCaptureOptions& options);
// The platform implementation should override these methods.
// Returns true if it is OK to capture the whole screen and crop to the
// selected window, i.e. the selected window is opaque, rectangular, and not
// occluded.
virtual bool ShouldUseScreenCapturer() = 0;
// Returns the window area relative to the top left of the virtual screen
// within the bounds of the virtual screen. This function should return the
// DesktopRect in full desktop coordinates, i.e. the top-left monitor starts
// from (0, 0).
virtual DesktopRect GetWindowRectInVirtualScreen() = 0;
WindowId selected_window() const { return selected_window_; }
WindowId excluded_window() const { return excluded_window_; }
DesktopCapturer* window_capturer() const { return window_capturer_.get(); }
private:
DesktopCaptureOptions options_;
DesktopCapturer::Callback* callback_;
std::unique_ptr<DesktopCapturer> window_capturer_;
std::unique_ptr<DesktopCapturer> screen_capturer_;
SourceId selected_window_;
WindowId excluded_window_;
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_CROPPING_WINDOW_CAPTURER_H_
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