fix(windows): Crash on app startup when Media Feature Pack is not installed on Windows N

packages/audioplayers/example/integration_test/platform_test.dart

@@ -35,6 +35,9 @@ void main() async {
       isAndroid && await PlatformFeatures.usesAndroidMediaPlayerImpl();
   final audioTestDataList = await getAudioTestDataList();
 
+  // Ensure global platform scope is initialized.
+  await AudioPlayer.global.ensureInitialized();
+
   group('Platform method channel', () {
     late AudioplayersPlatformInterface platform;
     late String playerId;

packages/audioplayers_windows/windows/CMakeLists.txt

@@ -48,13 +48,16 @@ set_target_properties(${PLUGIN_NAME} PROPERTIES
 target_compile_features(${PLUGIN_NAME} PRIVATE cxx_std_20)
 
 target_link_libraries(${PLUGIN_NAME} PRIVATE ${CMAKE_BINARY_DIR}/packages/Microsoft.Windows.ImplementationLibrary/build/native/Microsoft.Windows.ImplementationLibrary.targets)
-target_link_libraries(${PLUGIN_NAME} PRIVATE Mfplat windowsapp)
+target_link_libraries(${PLUGIN_NAME} PRIVATE windowsapp)
 
 target_compile_definitions(${PLUGIN_NAME} PRIVATE FLUTTER_PLUGIN_IMPL)
 target_include_directories(${PLUGIN_NAME} INTERFACE
   "${CMAKE_CURRENT_SOURCE_DIR}/include")
 target_link_libraries(${PLUGIN_NAME} PRIVATE flutter flutter_wrapper_plugin)
-target_link_libraries(${PLUGIN_NAME} PRIVATE shlwapi)
+target_link_libraries(${PLUGIN_NAME} PRIVATE shlwapi Mfplat)
+
+target_link_libraries(${PLUGIN_NAME} PRIVATE delayimp)
+target_link_options(${PLUGIN_NAME} PRIVATE "/DELAYLOAD:Mfplat.dll")
 
 # List of absolute paths to libraries that should be bundled with the plugin
 set(audioplayers_windows_bundled_libraries

packages/audioplayers_windows/windows/audioplayers_windows_plugin.cpp

@@ -75,6 +75,10 @@ class AudioplayersWindowsPlugin : public Plugin {
   AudioPlayer* GetPlayer(std::string playerId);
 
   void OnGlobalLog(const std::string& message);
+
+  bool isMediaFoundationSupported = false;
+
+  void CheckMediaFoundationSupport();
 };
 
 // static
@@ -118,12 +122,38 @@ AudioplayersWindowsPlugin::AudioplayersWindowsPlugin() {}
 
 AudioplayersWindowsPlugin::~AudioplayersWindowsPlugin() {}
 
+// Test if on Windows N without Media Feature Pack installed
+void AudioplayersWindowsPlugin::CheckMediaFoundationSupport() {
+  HMODULE hMfplat =
+      LoadLibraryEx(L"Mfplat.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
+  HMODULE hMfreadwrite =
+      LoadLibraryEx(L"mfreadwrite.dll", NULL, LOAD_LIBRARY_SEARCH_SYSTEM32);
+  isMediaFoundationSupported = hMfplat && hMfreadwrite;
+  if (hMfplat)
+    FreeLibrary(hMfplat);
+  if (hMfreadwrite)
+    FreeLibrary(hMfreadwrite);
+}
+
 void AudioplayersWindowsPlugin::HandleGlobalMethodCall(
     const MethodCall<EncodableValue>& method_call,
     std::unique_ptr<MethodResult<EncodableValue>> result) {
   auto args = method_call.arguments();
 
   if (method_call.method_name().compare("init") == 0) {
+    CheckMediaFoundationSupport();
+    if (!isMediaFoundationSupported) {
+      // Just log without returning an error: the global channel works fine
+      // nontheless.
+      if (globalEvents) {
+        globalEvents->Error(
+            "WindowsAudioError",
+            "Media Feature Pack not found. Please install it from "
+            "Windows Settings > Optional Features.",
+            nullptr);
+      }
+    }
+
     for (const auto& entry : audioPlayers) {
       entry.second->Dispose();
     }
@@ -168,9 +198,22 @@ void AudioplayersWindowsPlugin::HandleMethodCall(
 
   auto player = GetPlayer(playerId);
   if (!player) {
-    result->Error(
-        "WindowsAudioError",
-        "Player has not yet been created or has already been disposed.");
+    if (method_call.method_name().compare("dispose") == 0) {
+      // If no player is available, still can dispose the event channel,
+      // e.g. when isMediaFoundationSupported is false.
+      playerEventChannels.erase(playerId);
+      result->Success();
+      return;
+    }
+    if (isMediaFoundationSupported) {
+      result->Error(
+          "WindowsAudioError",
+          "Player has not yet been created or has already been disposed.");
+    } else {
+      result->Error("WindowsAudioError",
+                    "Media Feature Pack not found. Please install it from "
+                    "Windows Settings > Optional Features.");
+    }
     return;
   }
 
@@ -275,9 +318,11 @@ void AudioplayersWindowsPlugin::CreatePlayer(std::string playerId) {
   EventStreamHandler<EncodableValue>* eventHandlerPtr = eventHandler.get();
   eventChannel->SetStreamHandler(std::move(eventHandler));
 
-  auto player =
-      std::make_unique<AudioPlayer>(playerId, methods.get(), eventHandlerPtr);
-  audioPlayers.insert(std::make_pair(playerId, std::move(player)));
+  if (isMediaFoundationSupported) {
+    auto player =
+        std::make_unique<AudioPlayer>(playerId, methods.get(), eventHandlerPtr);
+    audioPlayers.insert(std::make_pair(playerId, std::move(player)));
+  }
 
   // Keep the event channel and handler alive as long as the plugin/player
   // exists