Add support for games in NUS format (.app)

Requires title.tmd and title.tik in same directory

src/Cafe/OS/RPL/rpl.cpp

@@ -78,13 +78,6 @@ struct RPLRegionMappingTable
 void RPLLoader_UnloadModule(RPLModule* rpl);
 void RPLLoader_RemoveDependency(const char* name);
 
-char _ansiToLower(char c)
-{
-	if (c >= 'A' && c <= 'Z')
-		c -= ('A' - 'a');
-	return c;
-}
-
 uint8* RPLLoader_AllocateTrampolineCodeSpace(RPLModule* rplLoaderContext, sint32 size)
 {	
 	if (rplLoaderContext)

src/Cafe/TitleList/TitleInfo.cpp

@@ -99,6 +99,7 @@ TitleInfo::TitleInfo(const TitleInfo::CachedInfo& cachedInfo)
 	if (cachedInfo.titleDataFormat != TitleDataFormat::HOST_FS &&
 		cachedInfo.titleDataFormat != TitleDataFormat::WIIU_ARCHIVE &&
 		cachedInfo.titleDataFormat != TitleDataFormat::WUD &&
+		cachedInfo.titleDataFormat != TitleDataFormat::NUS &&
 		cachedInfo.titleDataFormat != TitleDataFormat::INVALID_STRUCTURE)
 		return;
 	if (cachedInfo.path.empty())
@@ -204,6 +205,12 @@ bool TitleInfo::DetectFormat(const fs::path& path, fs::path& pathOut, TitleDataF
 			pathOut = path;
 			return true;
 		}
+		else if (boost::iequals(filenameStr, "title.tmd"))
+		{
+			formatOut = TitleDataFormat::NUS;
+			pathOut = path;
+			return true;
+		}
 		else if (boost::iends_with(filenameStr, ".wua"))
 		{
 			formatOut = TitleDataFormat::WIIU_ARCHIVE;
@@ -378,12 +385,15 @@ bool TitleInfo::Mount(std::string_view virtualPath, std::string_view subfolder,
 			return false;
 		}
 	}
-	else if (m_titleFormat == TitleDataFormat::WUD)
+	else if (m_titleFormat == TitleDataFormat::WUD || m_titleFormat == TitleDataFormat::NUS)
 	{
 		if (m_mountpoints.empty())
 		{
 			cemu_assert_debug(!m_wudVolume);
-			m_wudVolume = FSTVolume::OpenFromDiscImage(m_fullPath);
+			if(m_titleFormat == TitleDataFormat::WUD)
+				m_wudVolume = FSTVolume::OpenFromDiscImage(m_fullPath); // open wud/wux
+			else
+				m_wudVolume = FSTVolume::OpenFromContentFolder(m_fullPath.parent_path());	// open from .app files directory, the path points to /title.tmd
 		}
 		if (!m_wudVolume)
 			return false;
@@ -433,7 +443,7 @@ void TitleInfo::Unmount(std::string_view virtualPath)
 		{
 			if (m_wudVolume)
 			{
-				cemu_assert_debug(m_titleFormat == TitleDataFormat::WUD);
+				cemu_assert_debug(m_titleFormat == TitleDataFormat::WUD || m_titleFormat == TitleDataFormat::NUS);
 				delete m_wudVolume;
 				m_wudVolume = nullptr;
 			}
@@ -664,6 +674,9 @@ std::string TitleInfo::GetPrintPath() const
 	case TitleDataFormat::WUD:
 		tmp.append(" [WUD]");
 		break;
+	case TitleDataFormat::NUS:
+		tmp.append(" [NUS]");
+		break;
 	case TitleDataFormat::WIIU_ARCHIVE:
 		tmp.append(" [WUA]");
 		break;

src/Cafe/TitleList/TitleInfo.h

@@ -60,6 +60,7 @@ public:
 		HOST_FS = 1, // host filesystem directory (fullPath points to root with content/code/meta subfolders)
 		WUD = 2, // WUD or WUX
 		WIIU_ARCHIVE = 3, // Wii U compressed single-file archive (.wua)
+	  	NUS = 4, // NUS format. Directory with .app files, title.tik and title.tmd
 		// error
 		INVALID_STRUCTURE = 0,
 	};

src/Cafe/TitleList/TitleList.cpp

@@ -324,17 +324,25 @@ bool CafeTitleList::RefreshWorkerThread()
 	return true;
 }
 
-bool _IsKnownFileExtension(std::string fileExtension)
+bool _IsKnownFileNameOrExtension(const fs::path& path)
 {
+	std::string fileExtension = _pathToUtf8(path.extension());
 	for (auto& it : fileExtension)
-		if (it >= 'A' && it <= 'Z')
+		it = _ansiToLower(it);
-			it -= ('A' - 'a');
+	if(fileExtension == ".tmd")
+	{
+		// must be "title.tmd"
+		std::string fileName = _pathToUtf8(path.filename());
+		for (auto& it : fileName)
+			it = _ansiToLower(it);
+		return fileName == "title.tmd";
+	}
 	return
 		fileExtension == ".wud" ||
 		fileExtension == ".wux" ||
 		fileExtension == ".iso" ||
 		fileExtension == ".wua";
-	// note: To detect extracted titles with RPX we use the content/code/meta folder structure
+	// note: To detect extracted titles with RPX we rely on the presence of the content,code,meta directory structure
 }
 
 void CafeTitleList::ScanGamePath(const fs::path& path)
@@ -353,7 +361,6 @@ void CafeTitleList::ScanGamePath(const fs::path& path)
 		else if (it.is_directory(ec))
 		{
 			dirsInDirectory.emplace_back(it.path());
-
 			std::string dirName = _pathToUtf8(it.path().filename());
 			if (boost::iequals(dirName, "content"))
 				hasContentFolder = true;
@@ -366,10 +373,10 @@ void CafeTitleList::ScanGamePath(const fs::path& path)
 	// always check individual files
 	for (auto& it : filesInDirectory)
 	{
-		// since checking files is slow, we only do it for known file extensions
+		// since checking individual files is slow, we limit it to known file names or extensions
 		if (!it.has_extension())
 			continue;
-		if (!_IsKnownFileExtension(_pathToUtf8(it.extension())))
+		if (!_IsKnownFileNameOrExtension(it))
 			continue;
 		AddTitleFromPath(it);
 	}

src/Common/precompiled.h

@@ -468,6 +468,14 @@ inline fs::path _utf8ToPath(std::string_view input)
     return fs::path(v);
 }
 
+// locale-independent variant of tolower() which also matches Wii U behavior
+inline char _ansiToLower(char c)
+{
+	if (c >= 'A' && c <= 'Z')
+		c -= ('A' - 'a');
+	return c;
+}
+
 class RunAtCemuBoot // -> replaces this with direct function calls. Linkers other than MSVC may optimize way object files entirely if they are not referenced from outside. So a source file self-registering using this would be causing issues
 {
 public:

src/gui/MainWindow.cpp

@@ -639,13 +639,15 @@ void MainWindow::OnFileMenu(wxCommandEvent& event)
 	if (menuId == MAINFRAME_MENU_ID_FILE_LOAD)
 	{
 		const auto wildcard = formatWxString(
-			"{}|*.wud;*.wux;*.wua;*.iso;*.rpx;*.elf"
+			"{}|*.wud;*.wux;*.wua;*.iso;*.rpx;*.elf;title.tmd"
 			"|{}|*.wud;*.wux;*.iso"
+			"|{}|title.tmd"
 			"|{}|*.wua"
 			"|{}|*.rpx;*.elf"
 			"|{}|*",
 			_("All Wii U files (*.wud, *.wux, *.wua, *.iso, *.rpx, *.elf)"),
 			_("Wii U image (*.wud, *.wux, *.iso, *.wad)"),
+			_("Wii U NUS content"),
 			_("Wii U archive (*.wua)"),
 			_("Wii U executable (*.rpx, *.elf)"),
 			_("All files (*.*)")

src/gui/components/wxTitleManagerList.cpp

@@ -941,6 +941,8 @@ wxString wxTitleManagerList::GetTitleEntryText(const TitleEntry& entry, ItemColu
 			return _("Folder");
 		case wxTitleManagerList::EntryFormat::WUD:
 			return _("WUD");
+		case wxTitleManagerList::EntryFormat::NUS:
+			return _("NUS");
 		case wxTitleManagerList::EntryFormat::WUA:
 			return _("WUA");
 		}
@@ -1010,16 +1012,19 @@ void wxTitleManagerList::HandleTitleListCallback(CafeTitleListCallbackEvent* evt
 	wxTitleManagerList::EntryFormat entryFormat;
 	switch (titleInfo.GetFormat())
 	{
-	case TitleInfo::TitleDataFormat::HOST_FS:
-	default:
-		entryFormat = EntryFormat::Folder;
-		break;
 	case TitleInfo::TitleDataFormat::WUD:
 		entryFormat = EntryFormat::WUD;
 		break;
+	case TitleInfo::TitleDataFormat::NUS:
+		entryFormat = EntryFormat::NUS;
+		break;
 	case TitleInfo::TitleDataFormat::WIIU_ARCHIVE:
 		entryFormat = EntryFormat::WUA;
 		break;
+	case TitleInfo::TitleDataFormat::HOST_FS:
+	default:
+		entryFormat = EntryFormat::Folder;
+		break;
 	}
 
 	if (evt->eventType == CafeTitleListCallbackEvent::TYPE::TITLE_DISCOVERED)

src/gui/components/wxTitleManagerList.h

@@ -42,6 +42,7 @@ public:
 	{
 		Folder,
 		WUD,
+		NUS,
 		WUA,
 	};