Initial installation of the virtual camera on Windows

It's not possible to test video APIs in CI, when they require hardware.
Install a virtual camera driver on Windows, that can be used in autotests.

Steps for installation and configuration of vcam are:
install vcam from GitLab, restore NuGet packages and build the solution,
register the created DLL in the win register, and set the env. variable.

Task-number: QTBUG-139831
Change-Id: I963aca94e980440dc96e6998e3cd6de387dd80e9
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Nils Petter Skålerud <nils.petter.skalerud@qt.io>
Reviewed-by: Artem Dyomin <artem.dyomin@qt.io>

coin/provisioning/common/windows/install_configure_vcam.ps1

@@ -0,0 +1,89 @@
+# Copyright (C) 2025 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+. "$PSScriptRoot\helpers.ps1"
+
+$script:commitSha    = "a8c4d08c9757c1689d832a33252ae465b97bfb9a"
+$script:repoUrl      = "https://git.qt.io/qtmultimedia/WindowsVirtualCamera/-/archive/$commitSha/WindowsVirtualCamera-$commitSha.zip"
+$script:unzip_location    = "C:\Utils\WindowsVirtualCamera"
+$script:download_location = "C:\Windows\Temp\WindowsVirtualCamera.zip"
+
+$script:nuget = [System.Environment]::GetEnvironmentVariable('NUGET_EXE_PATH', [System.EnvironmentVariableTarget]::Machine)
+
+$script:localPath    = "$unzip_location\WindowsVirtualCamera-$commitSha"
+$script:solutionFile = "VCamManager.sln"
+$script:buildConfig  = "Release"
+$script:targetPlatform = "x64"
+$script:dllPath      = "$localPath\$targetPlatform\$buildConfig\VCamSampleSource.dll"
+
+# Save the current location to return later
+$previousLocation = Get-Location
+
+Write-Host "Downloading from $repoUrl to $download_location"
+Invoke-WebRequest -Uri $repoUrl -OutFile $download_location
+Write-Host "Extracting $download_location to $unzip_location"
+Expand-Archive -Path $download_location -DestinationPath $unzip_location
+Remove-Item $download_location
+
+# Ensure we're inside repo folder
+Set-Location $localPath
+
+$hostArch = Get-CpuArchitecture
+$arch = $hostArch
+$result = EnterVSDevShell -HostArch $hostArch -Arch $arch
+if (-Not $result) {
+    return $false
+}
+
+Write-Host "Locating MSBuild"
+$vswhere = "${Env:ProgramFiles(x86)}\Microsoft Visual Studio\Installer\vswhere.exe"
+
+if (-not (Test-Path $vswhere)) {
+    throw "vswhere.exe not found! Path: $vswhere"
+}
+
+$msbuildPath = & $vswhere `
+        -latest `
+        -products * `
+        -requires Microsoft.Component.MSBuild `
+        -requires Microsoft.VisualStudio.Component.VC.Tools.x86.x64 `
+        -find "MSBuild\**\Bin\MSBuild.exe" `
+
+if ($LASTEXITCODE -ne 0 -or -not (Test-Path $msbuildPath)) {
+    throw "MSBuild NOT found. Make sure VS Build Tools are installed."
+}
+Write-Host "MSBuild found: $msbuildPath"
+
+Write-Host "Restoring NuGet packages"
+& $nuget restore $solutionFile
+
+Write-Host "Building solution $solutionFile"
+& "$msbuildPath" $solutionFile `
+    /t:Build `
+    /p:Configuration=$buildConfig `
+    /p:Platform=$targetPlatform `
+    /p:RestorePackagesConfig=true `
+    /m
+
+if ($LASTEXITCODE -eq 0) {
+    Write-Host "Build succeeded"
+} else {
+    Write-Host " Build failed with exit code $LASTEXITCODE"
+    exit $LASTEXITCODE
+}
+
+Write-Host "Registering the Virtual Camera dll"
+regsvr32 /s "$dllPath"
+
+if ($LASTEXITCODE -eq 0) {
+    Write-Host "Register succeeded"
+} else {
+    Write-Host "Register failed with exit code $LASTEXITCODE"
+    exit $LASTEXITCODE
+}
+
+Set-EnvironmentVariable "VCAM_PATH" "$localPath\$targetPlatform\$buildConfig"
+Write-Host "Environment variable VCAM_PATH set to $localPath\$targetPlatform\$buildConfig"
+
+# Return to previous location
+Set-Location $previousLocation

coin/provisioning/qtci-windows-11_21H2-x86_64/89-install-vcam.ps1

@@ -0,0 +1 @@
+. "$PSScriptRoot\..\common\windows\install_configure_vcam.ps1"

coin/provisioning/qtci-windows-11_22H2-x86_64/89-install-vcam.ps1

@@ -0,0 +1 @@
+. "$PSScriptRoot\..\common\windows\install_configure_vcam.ps1"

coin/provisioning/qtci-windows-11_23H2-x86_64/89-install-vcam.ps1

@@ -0,0 +1 @@
+. "$PSScriptRoot\..\common\windows\install_configure_vcam.ps1"

coin/provisioning/qtci-windows-11_24H2-x86_64/89-install-vcam.ps1

@@ -0,0 +1 @@
+. "$PSScriptRoot\..\common\windows\install_configure_vcam.ps1"