having fun with fatfs (#1189)

* patch TSC coords in DSi mode
* DSiware importer and shit

7 files changed, 997 insertions, 5 deletions

diff --git a/src/frontend/qt_sdl/CMakeLists.txt b/src/frontend/qt_sdl/CMakeLists.txt
index 1ec01b1..3de536c 100644
--- a/src/frontend/qt_sdl/CMakeLists.txt
+++ b/src/frontend/qt_sdl/CMakeLists.txt
@@ -11,6 +11,7 @@ SET(SOURCES_QT_SDL
     WifiSettingsDialog.cpp
     InterfaceSettingsDialog.cpp
     ROMInfoDialog.cpp
+	TitleManagerDialog.cpp
     Input.cpp
     LAN_PCap.cpp
     LAN_Socket.cpp
@@ -46,11 +47,12 @@ if (USE_QT6)
         set(Qt6Core_DIR ${QT6_STATIC_BASE}Core)
         set(Qt6Gui_DIR ${QT6_STATIC_BASE}Gui)
         set(Qt6Widgets_DIR ${QT6_STATIC_BASE}Widgets)
+        set(Qt6Network_DIR ${QT6_STATIC_BASE}Network)
         set(Qt6OpenGL_DIR ${QT6_STATIC_BASE}OpenGL)
         set(Qt6OpenGLWidgets_DIR ${QT6_STATIC_BASE}OpenGLWidgets)
     endif()
-    find_package(Qt6 COMPONENTS Core Gui Widgets OpenGL OpenGLWidgets REQUIRED)
-    set(QT_LINK_LIBS Qt6::Core Qt6::Gui Qt6::Widgets Qt6::OpenGL Qt6::OpenGLWidgets)
+    find_package(Qt6 COMPONENTS Core Gui Widgets Network OpenGL OpenGLWidgets REQUIRED)
+    set(QT_LINK_LIBS Qt6::Core Qt6::Gui Qt6::Widgets Qt6::Network Qt6::OpenGL Qt6::OpenGLWidgets)
 else()
     if (BUILD_STATIC AND QT5_STATIC_DIR)
         set(QT5_STATIC_BASE ${QT5_STATIC_DIR}/lib/cmake/Qt5)
@@ -58,9 +60,10 @@ else()
         set(Qt5Core_DIR ${QT5_STATIC_BASE}Core)
         set(Qt5Gui_DIR ${QT5_STATIC_BASE}Gui)
         set(Qt5Widgets_DIR ${QT5_STATIC_BASE}Widgets)
+        set(Qt5Network_DIR ${QT5_STATIC_BASE}Network)
     endif()
-    find_package(Qt5 COMPONENTS Core Gui Widgets REQUIRED)
-    set(QT_LINK_LIBS Qt5::Core Qt5::Gui Qt5::Widgets)
+    find_package(Qt5 COMPONENTS Core Gui Widgets Network REQUIRED)
+    set(QT_LINK_LIBS Qt5::Core Qt5::Gui Qt5::Widgets Qt5::Network)
 endif()
 
 set(CMAKE_AUTOMOC ON)
diff --git a/src/frontend/qt_sdl/TitleImportDialog.ui b/src/frontend/qt_sdl/TitleImportDialog.ui
new file mode 100644
index 0000000..ca2010b
--- /dev/null
+++ b/src/frontend/qt_sdl/TitleImportDialog.ui
@@ -0,0 +1,142 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TitleImportDialog</class>
+ <widget class="QDialog" name="TitleImportDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>495</width>
+    <height>202</height>
+   </rect>
+  </property>
+  <property name="sizePolicy">
+   <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+    <horstretch>0</horstretch>
+    <verstretch>0</verstretch>
+   </sizepolicy>
+  </property>
+  <property name="windowTitle">
+   <string>Import title - melonDS</string>
+  </property>
+  <layout class="QGridLayout" name="gridLayout">
+   <item row="3" column="2">
+    <widget class="QPushButton" name="btnTmdBrowse">
+     <property name="text">
+      <string>Browse...</string>
+     </property>
+    </widget>
+   </item>
+   <item row="4" column="0" colspan="3">
+    <widget class="QRadioButton" name="rbTmdFromNUS">
+     <property name="text">
+      <string>Download from NUS</string>
+     </property>
+    </widget>
+   </item>
+   <item row="2" column="0" colspan="3">
+    <widget class="QLabel" name="label_2">
+     <property name="text">
+      <string>Metadata (TMD):</string>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="0">
+    <widget class="QRadioButton" name="rbTmdFromFile">
+     <property name="text">
+      <string>From file:</string>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="1">
+    <widget class="QLineEdit" name="txtAppFile"/>
+   </item>
+   <item row="7" column="0" colspan="3">
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="orientation">
+      <enum>Qt::Horizontal</enum>
+     </property>
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+     </property>
+    </widget>
+   </item>
+   <item row="1" column="0" colspan="3">
+    <widget class="QLabel" name="label_4">
+     <property name="text">
+      <string/>
+     </property>
+    </widget>
+   </item>
+   <item row="0" column="0">
+    <widget class="QLabel" name="label">
+     <property name="text">
+      <string>Executable:</string>
+     </property>
+    </widget>
+   </item>
+   <item row="5" column="0" colspan="3">
+    <widget class="QLabel" name="label_3">
+     <property name="text">
+      <string/>
+     </property>
+    </widget>
+   </item>
+   <item row="3" column="1">
+    <widget class="QLineEdit" name="txtTmdFile"/>
+   </item>
+   <item row="0" column="2">
+    <widget class="QPushButton" name="btnAppBrowse">
+     <property name="text">
+      <string>Browse...</string>
+     </property>
+    </widget>
+   </item>
+   <item row="6" column="0" colspan="3">
+    <widget class="QCheckBox" name="cbReadOnly">
+     <property name="whatsThis">
+      <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Makes the title executable and TMD read-only. Prevents DSi system utilities from deleting them.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+     </property>
+     <property name="text">
+      <string>Make title files read-only</string>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>TitleImportDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>TitleImportDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/src/frontend/qt_sdl/TitleManagerDialog.cpp b/src/frontend/qt_sdl/TitleManagerDialog.cpp
new file mode 100644
index 0000000..b51475f
--- /dev/null
+++ b/src/frontend/qt_sdl/TitleManagerDialog.cpp
@@ -0,0 +1,564 @@
+/*
+    Copyright 2016-2021 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#include <stdio.h>
+#include <QFileDialog>
+#include <QMenu>
+
+#include "types.h"
+#include "Platform.h"
+#include "Config.h"
+#include "PlatformConfig.h"
+#include "FrontendUtil.h"
+#include "DSi_NAND.h"
+
+#include "TitleManagerDialog.h"
+#include "ui_TitleManagerDialog.h"
+#include "ui_TitleImportDialog.h"
+
+
+FILE* TitleManagerDialog::curNAND = nullptr;
+TitleManagerDialog* TitleManagerDialog::currentDlg = nullptr;
+
+extern char* EmuDirectory;
+
+
+TitleManagerDialog::TitleManagerDialog(QWidget* parent) : QDialog(parent), ui(new Ui::TitleManagerDialog)
+{
+    ui->setupUi(this);
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    ui->lstTitleList->setIconSize(QSize(32, 32));
+
+    const u32 category = 0x00030004;
+    std::vector<u32> titlelist;
+    DSi_NAND::ListTitles(category, titlelist);
+
+    for (std::vector<u32>::iterator it = titlelist.begin(); it != titlelist.end(); it++)
+    {
+        u32 titleid = *it;
+        createTitleItem(category, titleid);
+    }
+
+    ui->lstTitleList->sortItems();
+
+    ui->btnImportTitleData->setEnabled(false);
+    ui->btnExportTitleData->setEnabled(false);
+    ui->btnDeleteTitle->setEnabled(false);
+
+    {
+        QMenu* menu = new QMenu(ui->btnImportTitleData);
+
+        actImportTitleData[0] = menu->addAction("public.sav");
+        actImportTitleData[0]->setData(QVariant(DSi_NAND::TitleData_PublicSav));
+        connect(actImportTitleData[0], &QAction::triggered, this, &TitleManagerDialog::onImportTitleData);
+
+        actImportTitleData[1] = menu->addAction("private.sav");
+        actImportTitleData[1]->setData(QVariant(DSi_NAND::TitleData_PrivateSav));
+        connect(actImportTitleData[1], &QAction::triggered, this, &TitleManagerDialog::onImportTitleData);
+
+        actImportTitleData[2] = menu->addAction("banner.sav");
+        actImportTitleData[2]->setData(QVariant(DSi_NAND::TitleData_BannerSav));
+        connect(actImportTitleData[2], &QAction::triggered, this, &TitleManagerDialog::onImportTitleData);
+
+        ui->btnImportTitleData->setMenu(menu);
+    }
+
+    {
+        QMenu* menu = new QMenu(ui->btnExportTitleData);
+
+        actExportTitleData[0] = menu->addAction("public.sav");
+        actExportTitleData[0]->setData(QVariant(DSi_NAND::TitleData_PublicSav));
+        connect(actExportTitleData[0], &QAction::triggered, this, &TitleManagerDialog::onExportTitleData);
+
+        actExportTitleData[1] = menu->addAction("private.sav");
+        actExportTitleData[1]->setData(QVariant(DSi_NAND::TitleData_PrivateSav));
+        connect(actExportTitleData[1], &QAction::triggered, this, &TitleManagerDialog::onExportTitleData);
+
+        actExportTitleData[2] = menu->addAction("banner.sav");
+        actExportTitleData[2]->setData(QVariant(DSi_NAND::TitleData_BannerSav));
+        connect(actExportTitleData[2], &QAction::triggered, this, &TitleManagerDialog::onExportTitleData);
+
+        ui->btnExportTitleData->setMenu(menu);
+    }
+}
+
+TitleManagerDialog::~TitleManagerDialog()
+{
+    delete ui;
+}
+
+void TitleManagerDialog::createTitleItem(u32 category, u32 titleid)
+{
+    u32 version;
+    u8 header[0x1000];
+    u8 banner[0x2400];
+
+    DSi_NAND::GetTitleInfo(category, titleid, version, header, banner);
+
+    u8 icongfx[512];
+    u16 iconpal[16];
+    memcpy(icongfx, &banner[0x20], 512);
+    memcpy(iconpal, &banner[0x220], 16*2);
+    u32 icondata[32*32];
+    Frontend::ROMIcon(icongfx, iconpal, icondata);
+    QImage iconimg((const uchar*)icondata, 32, 32, QImage::Format_ARGB32);
+    QIcon icon(QPixmap::fromImage(iconimg.copy()));
+
+    // TODO: make it possible to select other languages?
+    u16 titleraw[129];
+    memcpy(titleraw, &banner[0x340], 128*sizeof(u16));
+    titleraw[128] = '\0';
+    QString title = QString::fromUtf16(titleraw);
+    title.replace("\n", " · ");
+
+    char gamecode[5];
+    *(u32*)&gamecode[0] = *(u32*)&header[0xC];
+    gamecode[4] = '\0';
+    char extra[128];
+    sprintf(extra, "\n(title ID: %s · %08x/%08x · version %08x)", gamecode, category, titleid, version);
+
+    QListWidgetItem* item = new QListWidgetItem(title + QString(extra));
+    item->setIcon(icon);
+    item->setData(Qt::UserRole, QVariant((qulonglong)(((u64)category<<32) | (u64)titleid)));
+    item->setData(Qt::UserRole+1, QVariant(*(u32*)&header[0x238])); // public.sav size
+    item->setData(Qt::UserRole+2, QVariant(*(u32*)&header[0x23C])); // private.sav size
+    item->setData(Qt::UserRole+3, QVariant((u32)((header[0x1BF] & 0x04) ? 0x4000 : 0))); // banner.sav size
+    ui->lstTitleList->addItem(item);
+}
+
+bool TitleManagerDialog::openNAND()
+{
+    FILE* bios7i = Platform::OpenLocalFile(Config::DSiBIOS7Path, "rb");
+    if (!bios7i)
+        return false;
+
+    u8 es_keyY[16];
+    fseek(bios7i, 0x8308, SEEK_SET);
+    fread(es_keyY, 16, 1, bios7i);
+    fclose(bios7i);
+
+    curNAND = Platform::OpenLocalFile(Config::DSiNANDPath, "r+b");
+    if (!curNAND)
+        return false;
+
+    if (!DSi_NAND::Init(curNAND, es_keyY))
+    {
+        fclose(curNAND);
+        curNAND = nullptr;
+        return false;
+    }
+
+    return true;
+}
+
+void TitleManagerDialog::closeNAND()
+{
+    if (curNAND)
+    {
+        DSi_NAND::DeInit();
+
+        fclose(curNAND);
+        curNAND = nullptr;
+    }
+}
+
+void TitleManagerDialog::done(int r)
+{
+    QDialog::done(r);
+
+    closeDlg();
+}
+
+void TitleManagerDialog::on_btnImportTitle_clicked()
+{
+    TitleImportDialog* importdlg = new TitleImportDialog(this, importAppPath, importTmdData, importReadOnly);
+    importdlg->open();
+    connect(importdlg, &TitleImportDialog::finished, this, &TitleManagerDialog::onImportTitleFinished);
+
+    importdlg->show();
+}
+
+void TitleManagerDialog::onImportTitleFinished(int res)
+{
+    if (res != QDialog::Accepted) return;
+
+    u32 titleid[2];
+    titleid[0] = (importTmdData[0x18C] << 24) | (importTmdData[0x18D] << 16) | (importTmdData[0x18E] << 8) | importTmdData[0x18F];
+    titleid[1] = (importTmdData[0x190] << 24) | (importTmdData[0x191] << 16) | (importTmdData[0x192] << 8) | importTmdData[0x193];
+
+    // remove anything that might hinder the install
+    DSi_NAND::DeleteTitle(titleid[0], titleid[1]);
+
+    bool importres = DSi_NAND::ImportTitle(importAppPath.toStdString().c_str(), importTmdData, importReadOnly);
+    if (!importres)
+    {
+        // remove a potential half-completed install
+        DSi_NAND::DeleteTitle(titleid[0], titleid[1]);
+
+        QMessageBox::critical(this,
+                              "Import title - melonDS",
+                              "An error occured while installing the title to the NAND.\nCheck that your NAND dump is valid.");
+    }
+    else
+    {
+        // it worked, wee!
+        createTitleItem(titleid[0], titleid[1]);
+        ui->lstTitleList->sortItems();
+    }
+}
+
+void TitleManagerDialog::on_btnDeleteTitle_clicked()
+{
+    QListWidgetItem* cur = ui->lstTitleList->currentItem();
+    if (!cur) return;
+
+    if (QMessageBox::question(this,
+                              "Delete title - melonDS",
+                              "The title and its associated data will be permanently deleted. Are you sure?",
+                              QMessageBox::StandardButtons(QMessageBox::Yes|QMessageBox::No),
+                              QMessageBox::No) != QMessageBox::Yes)
+        return;
+
+    u64 titleid = cur->data(Qt::UserRole).toULongLong();
+    DSi_NAND::DeleteTitle((u32)(titleid >> 32), (u32)titleid);
+
+    delete cur;
+}
+
+void TitleManagerDialog::on_lstTitleList_currentItemChanged(QListWidgetItem* cur, QListWidgetItem* prev)
+{
+    if (!cur)
+    {
+        ui->btnImportTitleData->setEnabled(false);
+        ui->btnExportTitleData->setEnabled(false);
+        ui->btnDeleteTitle->setEnabled(false);
+    }
+    else
+    {
+        ui->btnImportTitleData->setEnabled(true);
+        ui->btnExportTitleData->setEnabled(true);
+        ui->btnDeleteTitle->setEnabled(true);
+
+        u32 val;
+        val = cur->data(Qt::UserRole+1).toUInt();
+        actImportTitleData[0]->setEnabled(val != 0);
+        actExportTitleData[0]->setEnabled(val != 0);
+        val = cur->data(Qt::UserRole+2).toUInt();
+        actImportTitleData[1]->setEnabled(val != 0);
+        actExportTitleData[1]->setEnabled(val != 0);
+        val = cur->data(Qt::UserRole+3).toUInt();
+        actImportTitleData[2]->setEnabled(val != 0);
+        actExportTitleData[2]->setEnabled(val != 0);
+    }
+}
+
+void TitleManagerDialog::onImportTitleData()
+{
+    int type = ((QAction*)sender())->data().toInt();
+
+    QListWidgetItem* cur = ui->lstTitleList->currentItem();
+    if (!cur)
+    {
+        printf("what??\n");
+        return;
+    }
+
+    u32 wantedsize;
+    switch (type)
+    {
+    case DSi_NAND::TitleData_PublicSav:  wantedsize = cur->data(Qt::UserRole+1).toUInt(); break;
+    case DSi_NAND::TitleData_PrivateSav: wantedsize = cur->data(Qt::UserRole+2).toUInt(); break;
+    case DSi_NAND::TitleData_BannerSav:  wantedsize = cur->data(Qt::UserRole+3).toUInt(); break;
+    default:
+        printf("what??\n");
+        return;
+    }
+
+    QString file = QFileDialog::getOpenFileName(this,
+                                                "Select file to import...",
+                                                EmuDirectory,
+                                                "Title data files (*.sav);;Any file (*.*)");
+
+    if (file.isEmpty()) return;
+
+    FILE* f = fopen(file.toStdString().c_str(), "rb");
+    if (!f)
+    {
+        QMessageBox::critical(this,
+                              "Import title data - melonDS",
+                              "Could not open data file.\nCheck that the file is accessible.");
+        return;
+    }
+
+    fseek(f, 0, SEEK_END);
+    u64 len = ftell(f);
+    fclose(f);
+
+    if (len != wantedsize)
+    {
+        QMessageBox::critical(this,
+                              "Import title data - melonDS",
+                              QString("Cannot import this data file: size is incorrect (expected: %1 bytes).").arg(wantedsize));
+        return;
+    }
+
+    u64 titleid = cur->data(Qt::UserRole).toULongLong();
+    bool res = DSi_NAND::ImportTitleData((u32)(titleid >> 32), (u32)titleid, type, file.toStdString().c_str());
+    if (!res)
+    {
+        QMessageBox::critical(this,
+                              "Import title data - melonDS",
+                              "Failed to import the data file. Check that your NAND is accessible and valid.");
+    }
+}
+
+void TitleManagerDialog::onExportTitleData()
+{
+    int type = ((QAction*)sender())->data().toInt();
+
+    QListWidgetItem* cur = ui->lstTitleList->currentItem();
+    if (!cur)
+    {
+        printf("what??\n");
+        return;
+    }
+
+    QString exportname;
+    u32 wantedsize;
+    switch (type)
+    {
+    case DSi_NAND::TitleData_PublicSav:
+        exportname = "/public.sav";
+        wantedsize = cur->data(Qt::UserRole+1).toUInt();
+        break;
+    case DSi_NAND::TitleData_PrivateSav:
+        exportname = "/private.sav";
+        wantedsize = cur->data(Qt::UserRole+2).toUInt();
+        break;
+    case DSi_NAND::TitleData_BannerSav:
+        exportname = "/banner.sav";
+        wantedsize = cur->data(Qt::UserRole+3).toUInt();
+        break;
+    default:
+        printf("what??\n");
+        return;
+    }
+
+    QString file = QFileDialog::getSaveFileName(this,
+                                                "Select path to export to...",
+                                                QString(EmuDirectory) + exportname,
+                                                "Title data files (*.sav);;Any file (*.*)");
+
+    if (file.isEmpty()) return;
+
+    u64 titleid = cur->data(Qt::UserRole).toULongLong();
+    bool res = DSi_NAND::ExportTitleData((u32)(titleid >> 32), (u32)titleid, type, file.toStdString().c_str());
+    if (!res)
+    {
+        QMessageBox::critical(this,
+                              "Export title data - melonDS",
+                              "Failed to Export the data file. Check that the destination directory is writable.");
+    }
+}
+
+
+TitleImportDialog::TitleImportDialog(QWidget* parent, QString& apppath, u8* tmd, bool& readonly)
+: QDialog(parent), ui(new Ui::TitleImportDialog), appPath(apppath), tmdData(tmd), readOnly(readonly)
+{
+    ui->setupUi(this);
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    grpTmdSource = new QButtonGroup(this);
+    grpTmdSource->addButton(ui->rbTmdFromFile, 0);
+    grpTmdSource->addButton(ui->rbTmdFromNUS, 1);
+    connect(grpTmdSource, SIGNAL(buttonClicked(int)), this, SLOT(onChangeTmdSource(int)));
+    grpTmdSource->button(0)->setChecked(true);
+}
+
+TitleImportDialog::~TitleImportDialog()
+{
+    delete ui;
+}
+
+void TitleImportDialog::accept()
+{
+    QString path;
+    FILE* f;
+
+    bool tmdfromfile = (grpTmdSource->checkedId() == 0);
+
+    path = ui->txtAppFile->text();
+    f = fopen(path.toStdString().c_str(), "rb");
+    if (!f)
+    {
+        QMessageBox::critical(this,
+                              "Import title - melonDS",
+                              "Could not open executable file.\nCheck that the path is correct and that the file is accessible.");
+        return;
+    }
+
+    fseek(f, 0x230, SEEK_SET);
+    fread(titleid, 8, 1, f);
+    fclose(f);
+
+    if (titleid[1] != 0x00030004)
+    {
+        QMessageBox::critical(this,
+                              "Import title - melonDS",
+                              "Executable file is not a DSiware title.");
+        return;
+    }
+
+    if (tmdfromfile)
+    {
+        path = ui->txtTmdFile->text();
+        f = fopen(path.toStdString().c_str(), "rb");
+        if (!f)
+        {
+            QMessageBox::critical(this,
+                                  "Import title - melonDS",
+                                  "Could not open metadata file.\nCheck that the path is correct and that the file is accessible.");
+            return;
+        }
+
+        fread(tmdData, 0x208, 1, f);
+        fclose(f);
+
+        u32 tmdtitleid[2];
+        tmdtitleid[0] = (tmdData[0x18C] << 24) | (tmdData[0x18D] << 16) | (tmdData[0x18E] << 8) | tmdData[0x18F];
+        tmdtitleid[1] = (tmdData[0x190] << 24) | (tmdData[0x191] << 16) | (tmdData[0x192] << 8) | tmdData[0x193];
+
+        if (tmdtitleid[1] != titleid[0] || tmdtitleid[0] != titleid[1])
+        {
+            QMessageBox::critical(this,
+                                  "Import title - melonDS",
+                                  "Title ID in metadata file does not match executable file.");
+            return;
+        }
+    }
+
+    if (DSi_NAND::TitleExists(titleid[1], titleid[0]))
+    {
+        if (QMessageBox::question(this,
+                                  "Import title - melonDS",
+                                  "The selected title is already installed. Overwrite it?",
+                                  QMessageBox::StandardButtons(QMessageBox::Yes|QMessageBox::No),
+                                  QMessageBox::No) != QMessageBox::Yes)
+            return;
+    }
+
+    if (!tmdfromfile)
+    {
+        network = new QNetworkAccessManager(this);
+
+        char url[256];
+        sprintf(url, "http://nus.cdn.t.shop.nintendowifi.net/ccs/download/%08x%08x/tmd", titleid[1], titleid[0]);
+
+        QNetworkRequest req;
+        req.setUrl(QUrl(url));
+
+        netreply = network->get(req);
+        connect(netreply, &QNetworkReply::finished, this, &TitleImportDialog::tmdDownloaded);
+
+        setEnabled(false);
+    }
+    else
+    {
+        appPath = ui->txtAppFile->text();
+        readOnly = ui->cbReadOnly->isChecked();
+        QDialog::accept();
+    }
+}
+
+void TitleImportDialog::tmdDownloaded()
+{
+    bool good = false;
+
+    if (netreply->error() != QNetworkReply::NoError)
+    {
+        QMessageBox::critical(this,
+                              "Import title - melonDS",
+                              QString("An error occurred while trying to download the metadata file:\n\n") + netreply->errorString());
+    }
+    else if (netreply->bytesAvailable() < 2312)
+    {
+        QMessageBox::critical(this,
+                              "Import title - melonDS",
+                              "NUS returned a malformed metadata file.");
+    }
+    else
+    {
+        netreply->read((char*)tmdData, 520);
+
+        u32 tmdtitleid[2];
+        tmdtitleid[0] = (tmdData[0x18C] << 24) | (tmdData[0x18D] << 16) | (tmdData[0x18E] << 8) | tmdData[0x18F];
+        tmdtitleid[1] = (tmdData[0x190] << 24) | (tmdData[0x191] << 16) | (tmdData[0x192] << 8) | tmdData[0x193];
+
+        if (tmdtitleid[1] != titleid[0] || tmdtitleid[0] != titleid[1])
+        {
+            QMessageBox::critical(this,
+                                  "Import title - melonDS",
+                                  "NUS returned a malformed metadata file.");
+        }
+        else
+            good = true;
+    }
+
+    netreply->deleteLater();
+    setEnabled(true);
+
+    if (good)
+    {
+        appPath = ui->txtAppFile->text();
+        readOnly = ui->cbReadOnly->isChecked();
+        QDialog::accept();
+    }
+}
+
+void TitleImportDialog::on_btnAppBrowse_clicked()
+{
+    QString file = QFileDialog::getOpenFileName(this,
+                                                "Select title executable...",
+                                                EmuDirectory,
+                                                "DSiware executables (*.app *.nds *.dsi *.srl);;Any file (*.*)");
+
+    if (file.isEmpty()) return;
+
+    ui->txtAppFile->setText(file);
+}
+
+void TitleImportDialog::on_btnTmdBrowse_clicked()
+{
+    QString file = QFileDialog::getOpenFileName(this,
+                                                "Select title metadata...",
+                                                EmuDirectory,
+                                                "DSiware metadata (*.tmd);;Any file (*.*)");
+
+    if (file.isEmpty()) return;
+
+    ui->txtTmdFile->setText(file);
+}
+
+void TitleImportDialog::onChangeTmdSource(int id)
+{
+    bool pathenable = (id==0);
+
+    ui->txtTmdFile->setEnabled(pathenable);
+    ui->btnTmdBrowse->setEnabled(pathenable);
+}
diff --git a/src/frontend/qt_sdl/TitleManagerDialog.h b/src/frontend/qt_sdl/TitleManagerDialog.h
new file mode 100644
index 0000000..682362a
--- /dev/null
+++ b/src/frontend/qt_sdl/TitleManagerDialog.h
@@ -0,0 +1,133 @@
+/*
+    Copyright 2016-2021 Arisotura
+
+    This file is part of melonDS.
+
+    melonDS is free software: you can redistribute it and/or modify it under
+    the terms of the GNU General Public License as published by the Free
+    Software Foundation, either version 3 of the License, or (at your option)
+    any later version.
+
+    melonDS is distributed in the hope that it will be useful, but WITHOUT ANY
+    WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+    FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License along
+    with melonDS. If not, see http://www.gnu.org/licenses/.
+*/
+
+#ifndef TITLEMANAGERDIALOG_H
+#define TITLEMANAGERDIALOG_H
+
+#include <QDialog>
+#include <QMessageBox>
+#include <QListWidget>
+#include <QButtonGroup>
+
+#include <QUrl>
+#include <QNetworkRequest>
+#include <QNetworkReply>
+#include <QNetworkAccessManager>
+
+namespace Ui
+{
+    class TitleManagerDialog;
+    class TitleImportDialog;
+}
+class TitleManagerDialog;
+class TitleImportDialog;
+
+class TitleManagerDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit TitleManagerDialog(QWidget* parent);
+    ~TitleManagerDialog();
+
+    static FILE* curNAND;
+    static bool openNAND();
+    static void closeNAND();
+
+    static TitleManagerDialog* currentDlg;
+    static TitleManagerDialog* openDlg(QWidget* parent)
+    {
+        if (currentDlg)
+        {
+            currentDlg->activateWindow();
+            return currentDlg;
+        }
+
+        if (!openNAND())
+        {
+            QMessageBox::critical(parent,
+                                  "DSi title manager - melonDS",
+                                  "Failed to mount the DSi NAND. Check that your NAND dump is accessible and valid.");
+            return nullptr;
+        }
+
+        currentDlg = new TitleManagerDialog(parent);
+        currentDlg->open();
+        return currentDlg;
+    }
+    static void closeDlg()
+    {
+        currentDlg = nullptr;
+        closeNAND();
+    }
+
+private slots:
+    void done(int r);
+
+    void on_btnImportTitle_clicked();
+    void onImportTitleFinished(int res);
+    void on_btnDeleteTitle_clicked();
+    void on_lstTitleList_currentItemChanged(QListWidgetItem* cur, QListWidgetItem* prev);
+    void onImportTitleData();
+    void onExportTitleData();
+
+private:
+    Ui::TitleManagerDialog* ui;
+
+    QString importAppPath;
+    u8 importTmdData[0x208];
+    bool importReadOnly;
+
+    QAction* actImportTitleData[3];
+    QAction* actExportTitleData[3];
+
+    void createTitleItem(u32 category, u32 titleid);
+};
+
+class TitleImportDialog : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit TitleImportDialog(QWidget* parent, QString& apppath, u8* tmd, bool& readonly);
+    ~TitleImportDialog();
+
+private slots:
+    void accept() override;
+    void tmdDownloaded();
+
+    void on_btnAppBrowse_clicked();
+    void on_btnTmdBrowse_clicked();
+    void onChangeTmdSource(int id);
+
+private:
+    Ui::TitleImportDialog* ui;
+
+    QButtonGroup* grpTmdSource;
+
+    QNetworkAccessManager* network;
+    QNetworkReply* netreply;
+
+    QString& appPath;
+    u8* tmdData;
+    bool& readOnly;
+
+    u32 titleid[2];
+};
+
+#endif // TITLEMANAGERDIALOG_H
diff --git a/src/frontend/qt_sdl/TitleManagerDialog.ui b/src/frontend/qt_sdl/TitleManagerDialog.ui
new file mode 100644
index 0000000..8e84681
--- /dev/null
+++ b/src/frontend/qt_sdl/TitleManagerDialog.ui
@@ -0,0 +1,133 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>TitleManagerDialog</class>
+ <widget class="QDialog" name="TitleManagerDialog">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>608</width>
+    <height>466</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>DSi title manager - melonDS</string>
+  </property>
+  <layout class="QVBoxLayout" name="verticalLayout_2">
+   <property name="leftMargin">
+    <number>6</number>
+   </property>
+   <property name="topMargin">
+    <number>6</number>
+   </property>
+   <property name="rightMargin">
+    <number>6</number>
+   </property>
+   <property name="bottomMargin">
+    <number>6</number>
+   </property>
+   <item>
+    <layout class="QHBoxLayout" name="horizontalLayout">
+     <item>
+      <widget class="QPushButton" name="btnImportTitle">
+       <property name="whatsThis">
+        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Import a DSiware title to your emulated DSi system.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+       </property>
+       <property name="text">
+        <string>Import title...</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="btnImportTitleData">
+       <property name="whatsThis">
+        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Import data (save, banner...) for the selected title.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+       </property>
+       <property name="text">
+        <string>Import title data</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="btnExportTitleData">
+       <property name="whatsThis">
+        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Export the data (save, banner...) associated with the selected title.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+       </property>
+       <property name="text">
+        <string>Export title data</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <widget class="QPushButton" name="btnDeleteTitle">
+       <property name="whatsThis">
+        <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;Permanently delete the selected title and its associated data from your emulated DSi.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+       </property>
+       <property name="text">
+        <string>Delete title</string>
+       </property>
+      </widget>
+     </item>
+     <item>
+      <spacer name="horizontalSpacer">
+       <property name="orientation">
+        <enum>Qt::Horizontal</enum>
+       </property>
+       <property name="sizeHint" stdset="0">
+        <size>
+         <width>40</width>
+         <height>20</height>
+        </size>
+       </property>
+      </spacer>
+     </item>
+    </layout>
+   </item>
+   <item>
+    <widget class="QListWidget" name="lstTitleList"/>
+   </item>
+   <item>
+    <widget class="QDialogButtonBox" name="buttonBox">
+     <property name="standardButtons">
+      <set>QDialogButtonBox::Close</set>
+     </property>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>TitleManagerDialog</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>303</x>
+     <y>448</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>303</x>
+     <y>232</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>TitleManagerDialog</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>303</x>
+     <y>448</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>303</x>
+     <y>232</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/src/frontend/qt_sdl/main.cpp b/src/frontend/qt_sdl/main.cpp
index 1146a84..73fcf5a 100644
--- a/src/frontend/qt_sdl/main.cpp
+++ b/src/frontend/qt_sdl/main.cpp
@@ -58,6 +58,7 @@
 #include "WifiSettingsDialog.h"
 #include "InterfaceSettingsDialog.h"
 #include "ROMInfoDialog.h"
+#include "TitleManagerDialog.h"
 
 #include "types.h"
 #include "version.h"
@@ -1377,8 +1378,11 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent)
         connect(actSetupCheats, &QAction::triggered, this, &MainWindow::onSetupCheats);
 
         menu->addSeparator();
-        actROMInfo = menu->addAction("ROM Info");
+        actROMInfo = menu->addAction("ROM info");
         connect(actROMInfo, &QAction::triggered, this, &MainWindow::onROMInfo);
+
+        actTitleManager = menu->addAction("Manage DSi titles");
+        connect(actTitleManager, &QAction::triggered, this, &MainWindow::onOpenTitleManager);
     }
     {
         QMenu* menu = menubar->addMenu("Config");
@@ -1580,6 +1584,7 @@ MainWindow::MainWindow(QWidget* parent) : QMainWindow(parent)
     actFrameStep->setEnabled(false);
 
     actSetupCheats->setEnabled(false);
+    actTitleManager->setEnabled(strlen(Config::DSiNANDPath) > 0);
 
     actEnableCheats->setChecked(Config::EnableCheats != 0);
 
@@ -2391,6 +2396,11 @@ void MainWindow::onROMInfo()
     ROMInfoDialog* dlg = ROMInfoDialog::openDlg(this);
 }
 
+void MainWindow::onOpenTitleManager()
+{
+    TitleManagerDialog* dlg = TitleManagerDialog::openDlg(this);
+}
+
 void MainWindow::onOpenEmuSettings()
 {
     emuThread->emuPause();
@@ -2405,6 +2415,9 @@ void MainWindow::onEmuSettingsDialogFinished(int res)
 
     if (EmuSettingsDialog::needsReset)
         onReset();
+
+    if (!RunningSomething)
+        actTitleManager->setEnabled(strlen(Config::DSiNANDPath) > 0);
 }
 
 void MainWindow::onOpenInputConfig()
@@ -2661,6 +2674,7 @@ void MainWindow::onEmuStart()
     actImportSavefile->setEnabled(true);
 
     actSetupCheats->setEnabled(true);
+    actTitleManager->setEnabled(false);
 
     actROMInfo->setEnabled(true);
 }
@@ -2683,6 +2697,7 @@ void MainWindow::onEmuStop()
     actFrameStep->setEnabled(false);
 
     actSetupCheats->setEnabled(false);
+    actTitleManager->setEnabled(strlen(Config::DSiNANDPath) > 0);
 
     actROMInfo->setEnabled(false);
 }
diff --git a/src/frontend/qt_sdl/main.h b/src/frontend/qt_sdl/main.h
index 2b93543..1378417 100644
--- a/src/frontend/qt_sdl/main.h
+++ b/src/frontend/qt_sdl/main.h
@@ -248,6 +248,7 @@ private slots:
     void onSetupCheats();
     void onCheatsDialogFinished(int res);
     void onROMInfo();
+    void onOpenTitleManager();
 
     void onOpenEmuSettings();
     void onEmuSettingsDialogFinished(int res);
@@ -323,6 +324,7 @@ public:
     QAction* actEnableCheats;
     QAction* actSetupCheats;
     QAction* actROMInfo;
+    QAction* actTitleManager;
 
     QAction* actEmuSettings;
     QAction* actInputConfig;