[Windows] Cleanup COM library initialization/uninitialization.

drivers/wasapi/audio_driver_wasapi.cpp

@@ -206,8 +206,6 @@ Error AudioDriverWASAPI::audio_device_init(AudioDeviceWASAPI *p_device, bool p_i
 	IMMDeviceEnumerator *enumerator = nullptr;
 	IMMDevice *output_device = nullptr;
 
-	CoInitialize(nullptr);
-
 	HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
 	ERR_FAIL_COND_V(hr != S_OK, ERR_CANT_OPEN);
 
@@ -582,8 +580,6 @@ PackedStringArray AudioDriverWASAPI::audio_device_get_list(bool p_input) {
 
 	list.push_back(String("Default"));
 
-	CoInitialize(nullptr);
-
 	HRESULT hr = CoCreateInstance(CLSID_MMDeviceEnumerator, nullptr, CLSCTX_ALL, IID_IMMDeviceEnumerator, (void **)&enumerator);
 	ERR_FAIL_COND_V(hr != S_OK, PackedStringArray());
 
@@ -702,6 +698,8 @@ void AudioDriverWASAPI::write_sample(WORD format_tag, int bits_per_sample, BYTE
 }
 
 void AudioDriverWASAPI::thread_func(void *p_udata) {
+	CoInitializeEx(nullptr, COINIT_MULTITHREADED);
+
 	AudioDriverWASAPI *ad = static_cast<AudioDriverWASAPI *>(p_udata);
 	uint32_t avail_frames = 0;
 	uint32_t write_ofs = 0;
@@ -908,6 +906,7 @@ void AudioDriverWASAPI::thread_func(void *p_udata) {
 			OS::get_singleton()->delay_usec(1000);
 		}
 	}
+	CoUninitialize();
 }
 
 void AudioDriverWASAPI::start() {

platform/windows/display_server_windows.cpp

@@ -4412,5 +4412,4 @@ DisplayServerWindows::~DisplayServerWindows() {
 	if (tts) {
 		memdelete(tts);
 	}
-	CoUninitialize();
 }

platform/windows/os_windows.cpp

@@ -195,7 +195,6 @@ void OS_Windows::initialize() {
 	IPUnix::make_default();
 	main_loop = nullptr;
 
-	CoInitialize(nullptr);
 	HRESULT hr = DWriteCreateFactory(DWRITE_FACTORY_TYPE_SHARED, __uuidof(IDWriteFactory), reinterpret_cast<IUnknown **>(&dwrite_factory));
 	if (SUCCEEDED(hr)) {
 		hr = dwrite_factory->GetSystemFontCollection(&font_collection, false);
@@ -373,8 +372,6 @@ Vector<String> OS_Windows::get_video_adapter_driver_info() const {
 		return Vector<String>();
 	}
 
-	CoInitialize(nullptr);
-
 	HRESULT hr = CoCreateInstance(clsid, NULL, CLSCTX_INPROC_SERVER, uuid, (LPVOID *)&wbemLocator);
 	if (hr != S_OK) {
 		return Vector<String>();
@@ -1505,6 +1502,8 @@ Error OS_Windows::move_to_trash(const String &p_path) {
 OS_Windows::OS_Windows(HINSTANCE _hInstance) {
 	hInstance = _hInstance;
 
+	CoInitializeEx(nullptr, COINIT_MULTITHREADED);
+
 #ifdef WASAPI_ENABLED
 	AudioDriverManager::add_driver(&driver_wasapi);
 #endif
@@ -1532,4 +1531,5 @@ OS_Windows::OS_Windows(HINSTANCE _hInstance) {
 }
 
 OS_Windows::~OS_Windows() {
+	CoUninitialize();
 }

platform/windows/tts_windows.cpp

@@ -249,7 +249,6 @@ TTS_Windows *TTS_Windows::get_singleton() {
 
 TTS_Windows::TTS_Windows() {
 	singleton = this;
-	CoInitialize(nullptr);
 
 	if (SUCCEEDED(CoCreateInstance(CLSID_SpVoice, nullptr, CLSCTX_ALL, IID_ISpVoice, (void **)&synth))) {
 		ULONGLONG event_mask = SPFEI(SPEI_END_INPUT_STREAM) | SPFEI(SPEI_START_INPUT_STREAM) | SPFEI(SPEI_WORD_BOUNDARY);