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0bb354c540
This change moves ScopedComInitializer out of core_audio_utility and into rtc_base/win so it can be reused elsewhere more easily. It also adds HSTRING and GetActivationFactory functionality to rtc_base/win. These two were heavily based on what is already present base/win. All of these are necessary for the new window capturer based on the Windows.Graphics.Capture API. You can see how these APIs will be used in this CL: 186603: Implement WgcCaptureSession | https://webrtc-review.googlesource.com/c/src/+/186603 Bug: webrtc:9273 Change-Id: I0a36373aac98be779ccbabe1053bb8d6e234f6a3 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/188523 Commit-Queue: Tommi <tommi@webrtc.org> Reviewed-by: Tommi <tommi@webrtc.org> Cr-Commit-Position: refs/heads/master@{#32522}
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
/*
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* Copyright (c) 2020 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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#include "rtc_base/win/hstring.h"
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#include <libloaderapi.h>
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#include <winstring.h>
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namespace {
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FARPROC LoadComBaseFunction(const char* function_name) {
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static HMODULE const handle =
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::LoadLibraryExW(L"combase.dll", nullptr, LOAD_LIBRARY_SEARCH_SYSTEM32);
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return handle ? ::GetProcAddress(handle, function_name) : nullptr;
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}
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decltype(&::WindowsCreateString) GetWindowsCreateString() {
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static decltype(&::WindowsCreateString) const function =
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reinterpret_cast<decltype(&::WindowsCreateString)>(
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LoadComBaseFunction("WindowsCreateString"));
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return function;
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}
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decltype(&::WindowsDeleteString) GetWindowsDeleteString() {
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static decltype(&::WindowsDeleteString) const function =
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reinterpret_cast<decltype(&::WindowsDeleteString)>(
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LoadComBaseFunction("WindowsDeleteString"));
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return function;
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}
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} // namespace
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namespace webrtc {
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bool ResolveCoreWinRTStringDelayload() {
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return GetWindowsDeleteString() && GetWindowsCreateString();
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}
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HRESULT CreateHstring(const wchar_t* src, uint32_t len, HSTRING* out_hstr) {
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decltype(&::WindowsCreateString) create_string_func =
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GetWindowsCreateString();
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if (!create_string_func)
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return E_FAIL;
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return create_string_func(src, len, out_hstr);
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}
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HRESULT DeleteHstring(HSTRING hstr) {
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decltype(&::WindowsDeleteString) delete_string_func =
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GetWindowsDeleteString();
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if (!delete_string_func)
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return E_FAIL;
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return delete_string_func(hstr);
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}
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} // namespace webrtc
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