feabcdb76b
When capturing only one display, it is unnecessary to use DoDuplicateAll, which allocates bitmap image memory for a rectangle encompassing all screens and captures all displays. In this case, I switch to DoDuplicateOne. I have added an int parameter to GetNumFrameCaptured and EnsureFrameCaptured to distinguish which display's skip behavior is currently being executed. After the modification, when capturing a single monitor in a multi-monitor environment, only the bitmap image memory of the size of the captured monitor will be allocated, rather than for all monitors. Bug: webrtc:391914255 Change-Id: Iee56796c50282beaf1dbeef47f5937fe7fe94a05 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/375181 Reviewed-by: Joe Downing <joedow@chromium.org> Commit-Queue: Alexander Cooper <alcooper@chromium.org> Reviewed-by: Alexander Cooper <alcooper@chromium.org> Cr-Commit-Position: refs/heads/main@{#43822}
93 lines
3.2 KiB
C++
93 lines
3.2 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 MODULES_DESKTOP_CAPTURE_WIN_DXGI_ADAPTER_DUPLICATOR_H_
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#define MODULES_DESKTOP_CAPTURE_WIN_DXGI_ADAPTER_DUPLICATOR_H_
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#include <wrl/client.h>
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#include <vector>
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#include "modules/desktop_capture/desktop_geometry.h"
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#include "modules/desktop_capture/shared_desktop_frame.h"
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#include "modules/desktop_capture/win/d3d_device.h"
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#include "modules/desktop_capture/win/dxgi_context.h"
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#include "modules/desktop_capture/win/dxgi_output_duplicator.h"
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namespace webrtc {
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// A container of DxgiOutputDuplicators to duplicate monitors attached to a
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// single video card.
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class DxgiAdapterDuplicator {
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public:
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using Context = DxgiAdapterContext;
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// Creates an instance of DxgiAdapterDuplicator from a D3dDevice. Only
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// DxgiDuplicatorController can create an instance.
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explicit DxgiAdapterDuplicator(const D3dDevice& device);
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// Move constructor, to make it possible to store instances of
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// DxgiAdapterDuplicator in std::vector<>.
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DxgiAdapterDuplicator(DxgiAdapterDuplicator&& other);
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~DxgiAdapterDuplicator();
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// Initializes the DxgiAdapterDuplicator from a D3dDevice.
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bool Initialize();
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// Sequentially calls Duplicate function of all the DxgiOutputDuplicator
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// instances owned by this instance, and writes into `target`.
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bool Duplicate(Context* context, SharedDesktopFrame* target);
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// Captures one monitor and writes into `target`. `monitor_id` should be
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// between [0, screen_count()).
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bool DuplicateMonitor(Context* context,
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int monitor_id,
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SharedDesktopFrame* target);
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// Returns desktop rect covered by this DxgiAdapterDuplicator.
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DesktopRect desktop_rect() const { return desktop_rect_; }
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// Returns the size of one screen owned by this DxgiAdapterDuplicator. `id`
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// should be between [0, screen_count()).
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DesktopRect ScreenRect(int id) const;
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// Returns the device name of one screen owned by this DxgiAdapterDuplicator
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// in utf8 encoding. `id` should be between [0, screen_count()).
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const std::string& GetDeviceName(int id) const;
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// Returns the count of screens owned by this DxgiAdapterDuplicator. These
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// screens can be retrieved by an interger in the range of
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// [0, screen_count()).
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int screen_count() const;
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void Setup(Context* context);
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void Unregister(const Context* const context);
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// The minimum num_frames_captured() returned by `duplicators_`.
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int64_t GetNumFramesCaptured(int monitor_id) const;
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// Moves `desktop_rect_` and all underlying `duplicators_`. See
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// DxgiDuplicatorController::TranslateRect().
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void TranslateRect(const DesktopVector& position);
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private:
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bool DoInitialize();
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const D3dDevice device_;
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std::vector<DxgiOutputDuplicator> duplicators_;
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DesktopRect desktop_rect_;
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};
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} // namespace webrtc
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#endif // MODULES_DESKTOP_CAPTURE_WIN_DXGI_ADAPTER_DUPLICATOR_H_
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