Add CPU string in Windows ARM

Common/ArmCPUDetect.cpp

@@ -23,6 +23,39 @@
 #include "CPUDetect.h"
 #include "StringUtils.h"
 #include "FileUtil.h"
+#include "util/text/utf8.h"
+
+#if PPSSPP_PLATFORM(WINDOWS) 
+#if PPSSPP_PLATFORM(UWP)
+// TODO: Maybe we can move the implementation here? 
+std::string GetCPUBrandString();
+#else
+// No CPUID on ARM, so we'll have to read the registry
+#include <windows.h>
+std::string GetCPUBrandString() {
+	std::string cpu_string;
+	
+	HKEY key;
+	LSTATUS result = RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", 0, KEY_READ, &key);
+	if (result == ERROR_SUCCESS) {
+		DWORD size = 0;
+		DWORD type = REG_SZ;
+		RegQueryValueEx(key, L"ProcessorNameString", NULL, &type, NULL, &size);
+		LPBYTE buff = (LPBYTE)malloc(size);
+		if (buff != NULL) {
+			RegQueryValueEx(key, L"ProcessorNameString", NULL, &type, buff, &size);
+			cpu_string = ConvertWStringToUTF8((wchar_t*)buff);
+			free(buff);
+		}
+	}
+
+	if (cpu_string.empty())
+		return "Unknown";
+	else
+		return cpu_string;
+}
+#endif
+#endif
 
 // Only Linux platforms have /proc/cpuinfo
 #if PPSSPP_PLATFORM(LINUX)
@@ -209,7 +242,7 @@ void CPUInfo::Detect()
 	strcpy(brand_string, "Apple A");
 	num_cores = 2;
 #elif PPSSPP_PLATFORM(WINDOWS)
-	strcpy(brand_string, "Unknown");
+	truncate_cpy(brand_string, GetCPUBrandString().c_str());
 	isVFP3 = true;
 	isVFP4 = false;
 	SYSTEM_INFO sysInfo;

UWP/PPSSPP_UWPMain.cpp

@@ -36,6 +36,7 @@ using namespace Windows::Storage;
 using namespace Windows::Storage::Streams;
 using namespace Windows::System::Threading;
 using namespace Windows::ApplicationModel::DataTransfer;
+using namespace Windows::Devices::Enumeration;
 using namespace Concurrency;
 
 // UGLY!
@@ -465,6 +466,61 @@ bool System_InputBoxGetWString(const wchar_t *title, const std::wstring &default
 	return false;
 }
 
+std::string GetCPUBrandString() {
+	Platform::String^ cpu_id = nullptr;
+	Platform::String^ cpu_name = nullptr;
+	
+	// GUID_DEVICE_PROCESSOR: {97FADB10-4E33-40AE-359C-8BEF029DBDD0}
+	Platform::String^ if_filter = L"System.Devices.InterfaceClassGuid:=\"{97FADB10-4E33-40AE-359C-8BEF029DBDD0}\"";
+
+	// Enumerate all CPU DeviceInterfaces, and get DeviceInstanceID of the first one.
+	auto if_task = create_task(
+		DeviceInformation::FindAllAsync(if_filter)).then([&](DeviceInformationCollection ^ collection) {
+			if (collection->Size > 0) {
+				auto cpu = collection->GetAt(0);
+				auto id = cpu->Properties->Lookup(L"System.Devices.DeviceInstanceID");
+				cpu_id = dynamic_cast<Platform::String^>(id);
+			}
+	});
+
+	try {
+		if_task.wait();
+	}
+	catch (const std::exception & e) {
+		const char* what = e.what();
+		ILOG("%s", what);
+	}
+
+	if (cpu_id != nullptr) {
+		// Get the Device with the same ID as the DeviceInterface
+		// Then get the name (description) of that Device
+		// We have to do this because the DeviceInterface we get doesn't have a proper description.
+		Platform::String^ dev_filter = L"System.Devices.DeviceInstanceID:=\"" + cpu_id + L"\"";
+
+		auto dev_task = create_task(
+			DeviceInformation::FindAllAsync(dev_filter, {}, DeviceInformationKind::Device)).then(
+				[&](DeviceInformationCollection ^ collection) {
+					if (collection->Size > 0) {
+						cpu_name = collection->GetAt(0)->Name;
+					}
+		});
+
+		try {
+			dev_task.wait();
+		}
+		catch (const std::exception & e) {
+			const char* what = e.what();
+			ILOG("%s", what);
+		}
+	}
+
+	if (cpu_name != nullptr) {
+		return FromPlatformString(cpu_name);
+	} else {
+		return "Unknown";
+	}
+}
+
 // Emulation of TlsAlloc for Windows 10. Used by glslang. Doesn't actually seem to work, other than fixing the linking errors?
 
 extern "C" {