2d618de25a
Current DirectX capturer cannot capture multiple video cards or monitors. But according to DXGI desktop duplication sample (https://goo.gl/An0L9l), we can capture multiple video cards and monitors by duplicating them one by one. So instead of one IDXGIOutputDuplication instance, this change creates an IDXGIOutputDuplication instance for each monitor, and merge the output into one DesktopFrame. Several other changes are also included, 1. Add supports to DXGI_OUTDUPL_DESC.DesktopImageInSystemMemory. When this flag is true, we won't copy its content to staging buffer. 2. Capture one monitor instead of entire screen. Above changes make the logic complex. But with some refactor work, the logic is not disordered. Please refer to the doc @ https://goo.gl/hU1ifG. BUG=314516 Review-Url: https://codereview.webrtc.org/2099123002 Cr-Commit-Position: refs/heads/master@{#13684}
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
/*
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* Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_H_
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#define WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_H_
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#include <DXGI1_2.h>
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#include <memory>
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#include "webrtc/modules/desktop_capture/desktop_frame.h"
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#include "webrtc/modules/desktop_capture/desktop_geometry.h"
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namespace webrtc {
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class DesktopRegion;
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// A texture copied or mapped from a DXGI_OUTDUPL_FRAME_INFO and IDXGIResource.
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class DxgiTexture {
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public:
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// Creates a DxgiTexture instance, which represents the DesktopRect area of
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// entire screen -- usually a monitor on the system.
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explicit DxgiTexture(const DesktopRect& desktop_rect);
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virtual ~DxgiTexture() = default;
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// Copies selected regions of a frame represented by frame_info and resource.
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// Returns false if anything wrong.
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virtual bool CopyFrom(const DXGI_OUTDUPL_FRAME_INFO& frame_info,
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IDXGIResource* resource,
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const DesktopRegion& region) = 0;
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const DesktopRect& desktop_rect() const { return desktop_rect_; }
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uint8_t* bits() const { return static_cast<uint8_t*>(rect_.pBits); }
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int pitch() const { return static_cast<int>(rect_.Pitch); }
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// Releases the resource currently holds by this instance. Returns false if
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// anything wrong, and this instance should be deprecated in this state. bits,
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// pitch and AsDesktopFrame are only valid after a success CopyFrom() call,
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// but before Release() call.
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bool Release();
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// Returns a DesktopFrame snapshot of a DxgiTexture instance. This
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// DesktopFrame is used to copy a DxgiTexture content to another DesktopFrame
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// only. And it should not outlive its DxgiTexture instance.
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const DesktopFrame& AsDesktopFrame();
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protected:
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DXGI_MAPPED_RECT rect_ = {0};
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private:
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virtual bool DoRelease() = 0;
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const DesktopRect desktop_rect_;
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std::unique_ptr<DesktopFrame> frame_;
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};
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} // namespace webrtc
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#endif // WEBRTC_MODULES_DESKTOP_CAPTURE_WIN_DXGI_TEXTURE_H_
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