draft windows arm support

.github/actions/run-tests/action.yaml

@@ -38,4 +38,4 @@ runs:
       if: ${{ runner.os == 'Windows' }}
       shell: pwsh
       run: |
-        ${{ inputs.workingDirectory }}/build_x64/tests/${{ inputs.config }}/advanced-scene-switcher-tests.exe
+        ${{ inputs.workingDirectory }}/build_${{ inputs.target }}/tests/${{ inputs.config }}/advanced-scene-switcher-tests.exe

.github/scripts/Build-Deps-Windows.ps1

@@ -2,7 +2,7 @@
 param(
     [ValidateSet('Debug', 'RelWithDebInfo', 'Release', 'MinSizeRel')]
     [string] $Configuration = 'RelWithDebInfo',
-    [ValidateSet('x86', 'x64')]
+    [ValidateSet('x86', 'x64', 'arm64')]
     [string] $Target,
     [ValidateSet('Visual Studio 17 2022', 'Visual Studio 16 2019')]
     [string] $CMakeGenerator,
@@ -211,13 +211,17 @@ function Build {
     $msbuildExe = vswhere -latest -requires Microsoft.Component.MSBuild -find MSBuild\**\Bin\MSBuild.exe | select-object -first 1
 
     if ($msbuildExe) {
+        $LibusbPlatform = if ($Target -eq 'arm64') { 'arm64' } else { 'x64' }
         $env:CL="/wd5287"
-        Invoke-External $msbuildExe "${LibusbPath}/msvc/libusb.sln" /property:Configuration=Release /property:Platform=x64
+        Invoke-External $msbuildExe "${LibusbPath}/msvc/libusb.sln" /property:Configuration=Release /property:Platform=$LibusbPlatform
         Remove-Item Env:CL
 
-        $libusbBuildResultDirectory = "${LibusbPath}/build/v143/x64/Release"
-        if (-not (Test-Path -Path $libusbBuildResultDirectory)) {
-            $libusbBuildResultDirectory = "${LibusbPath}/x64/Release/dll"
+        $libusbBuildResultDirectory = Get-ChildItem -Path "${LibusbPath}/build" -Directory -Filter "v*" -ErrorAction SilentlyContinue |
+            ForEach-Object { Join-Path $_.FullName "${LibusbPlatform}/Release" } |
+            Where-Object { Test-Path -Path $_ } |
+            Select-Object -First 1
+        if (-not $libusbBuildResultDirectory) {
+            $libusbBuildResultDirectory = "${LibusbPath}/${LibusbPlatform}/Release/dll"
         }
         Copy-Item -Path "${libusbBuildResultDirectory}/*" -Destination ${ADVSSDepPath} -Recurse -Force
     } else {
@@ -247,9 +251,10 @@ function Build {
 
     if ($opensslDir) {
         Write-Host "Detected OpenSSL at: $opensslDir"
+        $OpenSSLArch = if ($Target -eq 'arm64') { 'arm64' } else { 'x64' }
         $MqttCmakeArgs += "-DOPENSSL_ROOT_DIR=$opensslDir"
-        $MqttCmakeArgs += "-DOPENSSL_CRYPTO_LIBRARY=$opensslDir\lib\VC\x64\MD\libcrypto.lib"
-        $MqttCmakeArgs += "-DOPENSSL_SSL_LIBRARY=$opensslDir\lib\VC\x64\MD\libssl.lib"
+        $MqttCmakeArgs += "-DOPENSSL_CRYPTO_LIBRARY=$opensslDir\lib\VC\$OpenSSLArch\MD\libcrypto.lib"
+        $MqttCmakeArgs += "-DOPENSSL_SSL_LIBRARY=$opensslDir\lib\VC\$OpenSSLArch\MD\libssl.lib"
     } else {
         Write-Warning "OpenSSL not found - maybe cmake will find it ..."
     }

.github/scripts/Build-Windows.ps1

@@ -1,6 +1,6 @@
 [CmdletBinding()]
 param(
-    [ValidateSet('x64')]
+    [ValidateSet('x64', 'arm64')]
     [string] $Target = 'x64',
     [ValidateSet('Debug', 'RelWithDebInfo', 'Release', 'MinSizeRel')]
     [string] $Configuration = 'RelWithDebInfo',

.github/scripts/Package-Windows.ps1

@@ -1,6 +1,6 @@
 [CmdletBinding()]
 param(
-    [ValidateSet('x64')]
+    [ValidateSet('x64', 'arm64')]
     [string] $Target = 'x64',
     [ValidateSet('Debug', 'RelWithDebInfo', 'Release', 'MinSizeRel')]
     [string] $Configuration = 'RelWithDebInfo',
@@ -69,7 +69,8 @@ function Package {
     Remove-Item @RemoveArgs
 
     $ReleasePath = "${ProjectRoot}/release/${Configuration}"
-    $NewBinPath  = "${ReleasePath}/${ProductName}/bin/64bit"
+    $BinDirName  = if ($Target -eq 'arm64') { 'arm64' } else { '64bit' }
+    $NewBinPath  = "${ReleasePath}/${ProductName}/bin/${BinDirName}"
     $NewDataPath = "${ReleasePath}/${ProductName}/data"
     $CIWindowsDir = "${ProjectRoot}/build-aux/CI/windows"
 
@@ -80,7 +81,7 @@ function Package {
     New-Item -ItemType Directory -Force -Path $RecStaging | Out-Null
     Copy-Item -Path "${CIWindowsDir}/README.txt" -Destination "${RecStaging}/README.txt"
     if ( Test-Path -Path $NewBinPath ) {
-        $RecBinPath = "${RecStaging}/${ProductName}/bin/64bit"
+        $RecBinPath = "${RecStaging}/${ProductName}/bin/${BinDirName}"
         New-Item -ItemType Directory -Force -Path $RecBinPath | Out-Null
         Copy-Item -Path "${NewBinPath}/*" -Destination $RecBinPath -Recurse -Force
     }
@@ -102,7 +103,7 @@ function Package {
     New-Item -ItemType Directory -Force -Path $PortableStaging | Out-Null
     Copy-Item -Path "${CIWindowsDir}/README-portable.txt" -Destination "${PortableStaging}/README.txt"
     if ( Test-Path -Path $NewBinPath ) {
-        $PortableBinPath = "${PortableStaging}/obs-plugins/64bit"
+        $PortableBinPath = "${PortableStaging}/obs-plugins/${BinDirName}"
         New-Item -ItemType Directory -Force -Path $PortableBinPath | Out-Null
         Copy-Item -Path "${NewBinPath}/*" -Destination $PortableBinPath -Recurse -Force
     }
@@ -136,10 +137,10 @@ function Package {
         Copy-Item -Path "${Configuration}/*" -Destination $PkgRec -Recurse -Force
 
         # Legacy layout (for OBS installation directory)
-        if ( Test-Path "${Configuration}/${ProductName}/bin/64bit" ) {
-            $PkgLegBin = "Package/portable/obs-plugins/64bit"
+        if ( Test-Path "${Configuration}/${ProductName}/bin/${BinDirName}" ) {
+            $PkgLegBin = "Package/portable/obs-plugins/${BinDirName}"
             New-Item -ItemType Directory -Force -Path $PkgLegBin | Out-Null
-            Copy-Item -Path "${Configuration}/${ProductName}/bin/64bit/*" -Destination $PkgLegBin -Recurse -Force
+            Copy-Item -Path "${Configuration}/${ProductName}/bin/${BinDirName}/*" -Destination $PkgLegBin -Recurse -Force
         }
         if ( Test-Path "${Configuration}/${ProductName}/data" ) {
             $PkgLegData = "Package/portable/data/obs-plugins/${ProductName}"

.github/workflows/build-project.yaml

@@ -415,3 +415,63 @@ jobs:
         with:
           name: ${{ steps.setup.outputs.pluginName }}-${{ steps.setup.outputs.pluginVersion }}-windows-x64-${{ needs.check-event.outputs.commitHash }}
           path: ${{ github.workspace }}/release/${{ steps.setup.outputs.pluginName }}-*-windows-x64*.*
+
+  windows-arm64-build:
+    name: Build for Windows ARM64 🪟
+    runs-on: windows-11-arm
+    needs: check-event
+    defaults:
+      run:
+        shell: pwsh
+    steps:
+      - uses: actions/checkout@v6
+        with:
+          submodules: recursive
+          fetch-depth: 0
+
+      - name: Set Up Environment 🔧
+        id: setup
+        run: |
+          # Set Up Environment 🔧
+          if ( $Env:RUNNER_DEBUG -ne $null ) {
+            Set-PSDebug -Trace 1
+          }
+
+          $BuildSpec = Get-Content -Path buildspec.json -Raw | ConvertFrom-Json
+          $ProductName = $BuildSpec.name
+          $GitOutput = git describe --tags
+
+          "pluginName=${ProductName}" >> $env:GITHUB_OUTPUT
+          "pluginVersion=${GitOutput}" >> $env:GITHUB_OUTPUT
+
+      - name: Build Dependencies 🏗️
+        uses: ./.github/actions/build-dependencies
+        with:
+          workingDirectory: ${{ github.workspace }}/plugin
+          target: arm64
+          config: ${{ needs.check-event.outputs.config }}
+
+      - name: Build Plugin 🧱
+        uses: ./.github/actions/build-plugin
+        with:
+          target: arm64
+          config: ${{ needs.check-event.outputs.config }}
+
+      - name: Run tests
+        uses: ./.github/actions/run-tests
+        with:
+          target: arm64
+          config: ${{ needs.check-event.outputs.config }}
+
+      - name: Package Plugin 📀
+        uses: ./.github/actions/package-plugin
+        with:
+          target: arm64
+          config: ${{ needs.check-event.outputs.config }}
+          package: ${{ fromJSON(needs.check-event.outputs.package) }}
+
+      - name: Upload Artifacts 📡
+        uses: actions/upload-artifact@v7
+        with:
+          name: ${{ steps.setup.outputs.pluginName }}-${{ steps.setup.outputs.pluginVersion }}-windows-arm64-${{ needs.check-event.outputs.commitHash }}
+          path: ${{ github.workspace }}/release/${{ steps.setup.outputs.pluginName }}-*-windows-arm64*.*

CMakePresets.json

@@ -74,6 +74,35 @@
         "ADVSS_ENABLE_TESTS": true
       }
     },
+    {
+      "name": "windows-arm64",
+      "displayName": "Windows ARM64",
+      "description": "Build for Windows ARM64",
+      "inherits": ["template"],
+      "binaryDir": "${sourceDir}/build_arm64",
+      "condition": {
+        "type": "equals",
+        "lhs": "${hostSystemName}",
+        "rhs": "Windows"
+      },
+      "generator": "Visual Studio 18 2026",
+      "architecture": "ARM64",
+      "warnings": {"dev": true, "deprecated": true},
+      "cacheVariables": {
+        "QT_VERSION": "6",
+        "CMAKE_SYSTEM_VERSION": "10.0.18363.657"
+      }
+    },
+    {
+      "name": "windows-ci-arm64",
+      "inherits": ["windows-arm64"],
+      "displayName": "Windows ARM64 CI build",
+      "description": "Build for Windows ARM64 on CI",
+      "cacheVariables": {
+        "CMAKE_COMPILE_WARNING_AS_ERROR": true,
+        "ADVSS_ENABLE_TESTS": true
+      }
+    },
     {
       "name": "linux-x86_64",
       "displayName": "Linux x86_64",
@@ -162,6 +191,20 @@
       "description": "Windows CI build for x64 (RelWithDebInfo configuration)",
       "configuration": "RelWithDebInfo"
     },
+    {
+      "name": "windows-arm64",
+      "configurePreset": "windows-arm64",
+      "displayName": "Windows ARM64",
+      "description": "Windows build for ARM64",
+      "configuration": "RelWithDebInfo"
+    },
+    {
+      "name": "windows-ci-arm64",
+      "configurePreset": "windows-ci-arm64",
+      "displayName": "Windows ARM64 CI",
+      "description": "Windows CI build for ARM64 (RelWithDebInfo configuration)",
+      "configuration": "RelWithDebInfo"
+    },
     {
       "name": "linux-x86_64",
       "configurePreset": "linux-x86_64",

buildspec.json

@@ -6,7 +6,8 @@
             "label": "OBS sources",
             "hashes": {
                 "macos": "39751f067bacc13d44b116c5138491b5f1391f91516d3d590d874edd21292291",
-                "windows-x64": "2c8427c10b55ac6d68008df2e9a3e82f4647aaad18f105e30d4713c2de678ccf"
+                "windows-x64": "2c8427c10b55ac6d68008df2e9a3e82f4647aaad18f105e30d4713c2de678ccf",
+                "windows-ARM64": "2c8427c10b55ac6d68008df2e9a3e82f4647aaad18f105e30d4713c2de678ccf"
             }
         },
         "prebuilt": {
@@ -15,7 +16,8 @@
             "label": "Pre-Built obs-deps",
             "hashes": {
                 "macos": "495687e63383d1a287684b6e2e9bfe246bb8f156fe265926afb1a325af1edd2a",
-                "windows-x64": "c8c642c1070dc31ce9a0f1e4cef5bb992f4bff4882255788b5da12129e85caa7"
+                "windows-x64": "c8c642c1070dc31ce9a0f1e4cef5bb992f4bff4882255788b5da12129e85caa7",
+                "windows-ARM64": "f581cc61e8f734a8b12d485fc8662a408ca59d222814e4b37bce115bd442fb04"
             }
         },
         "qt6": {
@@ -24,10 +26,12 @@
             "label": "Pre-Built Qt6",
             "hashes": {
                 "macos": "d3f5f04b6ea486e032530bdf0187cbda9a54e0a49621a4c8ba984c5023998867",
-                "windows-x64": "0e76bf0555dd5382838850b748d3dcfab44a1e1058441309ab54e1a65b156d0a"
+                "windows-x64": "0e76bf0555dd5382838850b748d3dcfab44a1e1058441309ab54e1a65b156d0a",
+                "windows-ARM64": "7aab240504931f32ea8e8d208a912a0d6ddbd78c16858f2e559c7c9b29ab9326"
             },
             "debugSymbols": {
-                "windows-x64": "11b7be92cf66a273299b8f3515c07a5cfb61614b59a4e67f7fc5ecba5e2bdf21"
+                "windows-x64": "11b7be92cf66a273299b8f3515c07a5cfb61614b59a4e67f7fc5ecba5e2bdf21",
+                "windows-ARM64": "884ae08291b5c87d83a7b0004ea8db356530c1f4ff9bdc814b5d599a8d28a152"
             }
         }
     },

cmake/windows/buildspec.cmake

@@ -23,6 +23,108 @@ function(_check_dependencies_windows)
   set(dependencies_list prebuilt qt6 obs-studio)
 
   _check_dependencies()
+
+  if(arch STREQUAL "ARM64")
+    _setup_qt6_host_windows()
+  endif()
+endfunction()
+
+# _setup_qt6_host_windows: Fetch native x64 Qt6 as QT_HOST_PATH for ARM64 build
+# tools
+function(_setup_qt6_host_windows)
+  set(dependencies_dir "${CMAKE_CURRENT_SOURCE_DIR}/.deps")
+
+  if(NOT buildspec)
+    file(READ "${CMAKE_CURRENT_SOURCE_DIR}/buildspec.json" buildspec)
+  endif()
+
+  string(JSON data GET ${buildspec} dependencies qt6)
+  string(JSON version GET ${data} version)
+  string(JSON hash GET ${data} hashes windows-x64)
+  string(JSON base_url GET ${data} baseUrl)
+  string(JSON label GET ${data} label)
+  string(
+    JSON
+    revision
+    ERROR_VARIABLE
+    error
+    GET
+    ${data}
+    revision
+    windows-x64)
+
+  set(file "windows-deps-qt6-VERSION-x64-REVISION.zip")
+  set(destination "obs-deps-qt6-VERSION-x64")
+  string(REPLACE "VERSION" "${version}" file "${file}")
+  string(REPLACE "VERSION" "${version}" destination "${destination}")
+  if(revision)
+    string(REPLACE "_REVISION" "_v${revision}" file "${file}")
+    string(REPLACE "-REVISION" "-v${revision}" file "${file}")
+  else()
+    string(REPLACE "_REVISION" "" file "${file}")
+    string(REPLACE "-REVISION" "" file "${file}")
+  endif()
+
+  set(url "${base_url}/${version}/${file}")
+
+  message(STATUS "Setting up ${label} host (x64) for ARM64 cross-compilation")
+
+  if(NOT EXISTS
+     "${dependencies_dir}/${destination}/lib/cmake/Qt6/Qt6Config.cmake")
+    if(NOT EXISTS "${dependencies_dir}/${file}")
+      message(STATUS "Downloading ${url}")
+
+      set(MAX_DOWNLOAD_RETRIES 3)
+      set(RETRY_DELAY 60) # seconds
+      set(download_success FALSE)
+
+      foreach(i RANGE 1 ${MAX_DOWNLOAD_RETRIES})
+        message(STATUS "Attempt ${i}/${MAX_DOWNLOAD_RETRIES} for ${url}")
+
+        file(
+          DOWNLOAD "${url}" "${dependencies_dir}/${file}"
+          STATUS download_status
+          EXPECTED_HASH SHA256=${hash})
+
+        list(GET download_status 0 error_code)
+        list(GET download_status 1 error_message)
+
+        if(error_code EQUAL 0)
+          message(STATUS "Downloading ${url} - success on attempt ${i}")
+          set(download_success TRUE)
+          break()
+        else()
+          message(WARNING "Download failed (attempt ${i}): ${error_message}")
+          file(REMOVE "${dependencies_dir}/${file}")
+
+          if(NOT i EQUAL MAX_DOWNLOAD_RETRIES)
+            message(STATUS "Retrying in ${RETRY_DELAY} seconds...")
+            execute_process(COMMAND ${CMAKE_COMMAND} -E sleep ${RETRY_DELAY})
+          endif()
+        endif()
+      endforeach()
+
+      if(NOT download_success)
+        message(
+          FATAL_ERROR
+            "Unable to download ${url} after ${MAX_DOWNLOAD_RETRIES} attempts")
+      endif()
+      message(STATUS "Downloading ${url} - done")
+    endif()
+
+    file(MAKE_DIRECTORY "${dependencies_dir}/${destination}")
+    file(ARCHIVE_EXTRACT INPUT "${dependencies_dir}/${file}" DESTINATION
+         "${dependencies_dir}/${destination}")
+  endif()
+
+  message(STATUS "Using ${dependencies_dir}/${destination} as QT_HOST_PATH")
+  set(QT_HOST_PATH
+      "${dependencies_dir}/${destination}"
+      CACHE PATH "Path to a native Qt6 installation used to supply host tools"
+            FORCE)
+
+  message(
+    STATUS "Setting up ${label} host (x64) for ARM64 cross-compilation - done")
 endfunction()
 
 _check_dependencies_windows()

lib/utils/message-dispatcher.hpp

@@ -5,6 +5,10 @@
 #include <memory>
 #include <vector>
 
+#ifdef DispatchMessage
+#undef DispatchMessage
+#endif
+
 namespace advss {
 
 template<class T> class MessageDispatcher {

lib/win/advanced-scene-switcher-win.cpp

@@ -2,6 +2,7 @@
 #include "plugin-state-helpers.hpp"
 
 #include <windows.h>
+#include <objbase.h>
 #include <UIAutomation.h>
 #include <util/platform.h>
 #include <TlHelp32.h>