android: Refactor game metadata collection to new file

This also removes irrelevant data and adds new information from/to the Game data class and RomMetadata struct

src/android/app/src/main/java/org/yuzu/yuzu_emu/NativeLibrary.kt

@@ -215,32 +215,6 @@ object NativeLibrary {
 
     external fun initGameIni(gameID: String?)
 
-    /**
-     * Gets the embedded icon within the given ROM.
-     *
-     * @param filename the file path to the ROM.
-     * @return a byte array containing the JPEG data for the icon.
-     */
-    external fun getIcon(filename: String): ByteArray
-
-    /**
-     * Gets the embedded title of the given ISO/ROM.
-     *
-     * @param filename The file path to the ISO/ROM.
-     * @return the embedded title of the ISO/ROM.
-     */
-    external fun getTitle(filename: String): String
-
-    external fun getDescription(filename: String): String
-
-    external fun getGameId(filename: String): String
-
-    external fun getRegions(filename: String): String
-
-    external fun getCompany(filename: String): String
-
-    external fun isHomebrew(filename: String): Boolean
-
     external fun setAppDirectory(directory: String)
 
     /**
@@ -293,11 +267,6 @@ object NativeLibrary {
      */
     external fun stopEmulation()
 
-    /**
-     * Resets the in-memory ROM metadata cache.
-     */
-    external fun resetRomMetadata()
-
     /**
      * Returns true if emulation is running (or is paused).
      */

src/android/app/src/main/java/org/yuzu/yuzu_emu/adapters/GameAdapter.kt

@@ -147,7 +147,7 @@ class GameAdapter(private val activity: AppCompatActivity) :
 
     private class DiffCallback : DiffUtil.ItemCallback<Game>() {
         override fun areItemsTheSame(oldItem: Game, newItem: Game): Boolean {
-            return oldItem.gameId == newItem.gameId
+            return oldItem.programId == newItem.programId
         }
 
         override fun areContentsTheSame(oldItem: Game, newItem: Game): Boolean {

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/Game.kt

@@ -12,15 +12,14 @@ import kotlinx.serialization.Serializable
 @Serializable
 class Game(
     val title: String,
-    val description: String,
-    val regions: String,
     val path: String,
-    val gameId: String,
+    val programId: String,
-    val company: String,
+    val developer: String,
+    val version: String,
     val isHomebrew: Boolean
 ) : Parcelable {
-    val keyAddedToLibraryTime get() = "${gameId}_AddedToLibraryTime"
+    val keyAddedToLibraryTime get() = "${programId}_AddedToLibraryTime"
-    val keyLastPlayedTime get() = "${gameId}_LastPlayed"
+    val keyLastPlayedTime get() = "${programId}_LastPlayed"
 
     override fun equals(other: Any?): Boolean {
         if (other !is Game) {
@@ -32,11 +31,9 @@ class Game(
 
     override fun hashCode(): Int {
         var result = title.hashCode()
-        result = 31 * result + description.hashCode()
-        result = 31 * result + regions.hashCode()
         result = 31 * result + path.hashCode()
-        result = 31 * result + gameId.hashCode()
+        result = 31 * result + programId.hashCode()
-        result = 31 * result + company.hashCode()
+        result = 31 * result + developer.hashCode()
         result = 31 * result + isHomebrew.hashCode()
         return result
     }

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/GamesViewModel.kt

@@ -14,15 +14,13 @@ import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.launch
 import kotlinx.coroutines.withContext
-import kotlinx.serialization.ExperimentalSerializationApi
-import kotlinx.serialization.MissingFieldException
 import kotlinx.serialization.decodeFromString
 import kotlinx.serialization.json.Json
 import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.YuzuApplication
 import org.yuzu.yuzu_emu.utils.GameHelper
+import org.yuzu.yuzu_emu.utils.GameMetadata
 
-@OptIn(ExperimentalSerializationApi::class)
 class GamesViewModel : ViewModel() {
     val games: StateFlow<List<Game>> get() = _games
     private val _games = MutableStateFlow(emptyList<Game>())
@@ -58,7 +56,8 @@ class GamesViewModel : ViewModel() {
                         val game: Game
                         try {
                             game = Json.decodeFromString(it)
-                        } catch (e: MissingFieldException) {
+                        } catch (e: Exception) {
+                            // We don't care about any errors related to parsing the game cache
                             return@forEach
                         }
 
@@ -113,7 +112,7 @@ class GamesViewModel : ViewModel() {
 
         viewModelScope.launch {
             withContext(Dispatchers.IO) {
-                NativeLibrary.resetRomMetadata()
+                GameMetadata.resetMetadata()
                 setGames(GameHelper.getGames())
                 _isReloading.value = false
 

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/GameHelper.kt

@@ -71,27 +71,26 @@ object GameHelper {
 
     fun getGame(uri: Uri, addedToLibrary: Boolean): Game {
         val filePath = uri.toString()
-        var name = NativeLibrary.getTitle(filePath)
+        var name = GameMetadata.getTitle(filePath)
 
         // If the game's title field is empty, use the filename.
         if (name.isEmpty()) {
             name = FileUtil.getFilename(uri)
         }
-        var gameId = NativeLibrary.getGameId(filePath)
+        var programId = GameMetadata.getProgramId(filePath)
 
         // If the game's ID field is empty, use the filename without extension.
-        if (gameId.isEmpty()) {
+        if (programId.isEmpty()) {
-            gameId = name.substring(0, name.lastIndexOf("."))
+            programId = name.substring(0, name.lastIndexOf("."))
         }
 
         val newGame = Game(
             name,
-            NativeLibrary.getDescription(filePath).replace("\n", " "),
-            NativeLibrary.getRegions(filePath),
             filePath,
-            gameId,
+            programId,
-            NativeLibrary.getCompany(filePath),
+            GameMetadata.getDeveloper(filePath),
-            NativeLibrary.isHomebrew(filePath)
+            GameMetadata.getVersion(filePath),
+            GameMetadata.getIsHomebrew(filePath)
         )
 
         if (addedToLibrary) {

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/GameIconUtils.kt

@@ -18,7 +18,6 @@ import coil.key.Keyer
 import coil.memory.MemoryCache
 import coil.request.ImageRequest
 import coil.request.Options
-import org.yuzu.yuzu_emu.NativeLibrary
 import org.yuzu.yuzu_emu.R
 import org.yuzu.yuzu_emu.YuzuApplication
 import org.yuzu.yuzu_emu.model.Game
@@ -36,7 +35,7 @@ class GameIconFetcher(
     }
 
     private fun decodeGameIcon(uri: String): Bitmap? {
-        val data = NativeLibrary.getIcon(uri)
+        val data = GameMetadata.getIcon(uri)
         return BitmapFactory.decodeByteArray(
             data,
             0,

src/android/app/src/main/java/org/yuzu/yuzu_emu/utils/GameMetadata.kt

@@ -0,0 +1,20 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+package org.yuzu.yuzu_emu.utils
+
+object GameMetadata {
+    external fun getTitle(path: String): String
+
+    external fun getProgramId(path: String): String
+
+    external fun getDeveloper(path: String): String
+
+    external fun getVersion(path: String): String
+
+    external fun getIcon(path: String): ByteArray
+
+    external fun getIsHomebrew(path: String): Boolean
+
+    external fun resetMetadata()
+}

src/android/app/src/main/jni/CMakeLists.txt

@@ -17,6 +17,7 @@ add_library(yuzu-android SHARED
     native.h
     native_config.cpp
     uisettings.cpp
+    game_metadata.cpp
 )
 
 set_property(TARGET yuzu-android PROPERTY IMPORTED_LOCATION ${FFmpeg_LIBRARY_DIR})

src/android/app/src/main/jni/game_metadata.cpp

@@ -0,0 +1,112 @@
+// SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <core/core.h>
+#include <core/file_sys/patch_manager.h>
+#include <core/loader/nro.h>
+#include <jni.h>
+#include "core/loader/loader.h"
+#include "jni/android_common/android_common.h"
+#include "native.h"
+
+struct RomMetadata {
+    std::string title;
+    u64 programId;
+    std::string developer;
+    std::string version;
+    std::vector<u8> icon;
+    bool isHomebrew;
+};
+
+std::unordered_map<std::string, RomMetadata> m_rom_metadata_cache;
+
+RomMetadata CacheRomMetadata(const std::string& path) {
+    const auto file =
+        Core::GetGameFileFromPath(EmulationSession::GetInstance().System().GetFilesystem(), path);
+    auto loader = Loader::GetLoader(EmulationSession::GetInstance().System(), file, 0, 0);
+
+    RomMetadata entry;
+    loader->ReadTitle(entry.title);
+    loader->ReadProgramId(entry.programId);
+    loader->ReadIcon(entry.icon);
+
+    const FileSys::PatchManager pm{
+        entry.programId, EmulationSession::GetInstance().System().GetFileSystemController(),
+        EmulationSession::GetInstance().System().GetContentProvider()};
+    const auto control = pm.GetControlMetadata();
+
+    if (control.first != nullptr) {
+        entry.developer = control.first->GetDeveloperName();
+        entry.version = control.first->GetVersionString();
+    } else {
+        FileSys::NACP nacp;
+        if (loader->ReadControlData(nacp) == Loader::ResultStatus::Success) {
+            entry.developer = nacp.GetDeveloperName();
+        } else {
+            entry.developer = "";
+        }
+
+        entry.version = "1.0.0";
+    }
+
+    if (loader->GetFileType() == Loader::FileType::NRO) {
+        auto loader_nro = reinterpret_cast<Loader::AppLoader_NRO*>(loader.get());
+        entry.isHomebrew = loader_nro->IsHomebrew();
+    } else {
+        entry.isHomebrew = false;
+    }
+
+    m_rom_metadata_cache[path] = entry;
+
+    return entry;
+}
+
+RomMetadata GetRomMetadata(const std::string& path) {
+    if (auto search = m_rom_metadata_cache.find(path); search != m_rom_metadata_cache.end()) {
+        return search->second;
+    }
+
+    return CacheRomMetadata(path);
+}
+
+extern "C" {
+
+jstring Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getTitle(JNIEnv* env, jobject obj,
+                                                            jstring jpath) {
+    return ToJString(env, GetRomMetadata(GetJString(env, jpath)).title);
+}
+
+jstring Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getProgramId(JNIEnv* env, jobject obj,
+                                                                jstring jpath) {
+    return ToJString(env, std::to_string(GetRomMetadata(GetJString(env, jpath)).programId));
+}
+
+jstring Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getDeveloper(JNIEnv* env, jobject obj,
+                                                                jstring jpath) {
+    return ToJString(env, GetRomMetadata(GetJString(env, jpath)).developer);
+}
+
+jstring Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getVersion(JNIEnv* env, jobject obj,
+                                                              jstring jpath) {
+    return ToJString(env, GetRomMetadata(GetJString(env, jpath)).version);
+}
+
+jbyteArray Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getIcon(JNIEnv* env, jobject obj,
+                                                              jstring jpath) {
+    auto icon_data = GetRomMetadata(GetJString(env, jpath)).icon;
+    jbyteArray icon = env->NewByteArray(static_cast<jsize>(icon_data.size()));
+    env->SetByteArrayRegion(icon, 0, env->GetArrayLength(icon),
+                            reinterpret_cast<jbyte*>(icon_data.data()));
+    return icon;
+}
+
+jboolean Java_org_yuzu_yuzu_1emu_utils_GameMetadata_getIsHomebrew(JNIEnv* env, jobject obj,
+                                                                  jstring jpath) {
+    return static_cast<jboolean>(GetRomMetadata(GetJString(env, jpath)).isHomebrew);
+}
+
+void Java_org_yuzu_yuzu_1emu_utils_GameMetadata_resetMetadata(JNIEnv* env, jobject obj) {
+    return m_rom_metadata_cache.clear();
+}
+
+} // extern "C"

src/android/app/src/main/jni/native.cpp

@@ -558,10 +558,6 @@ void Java_org_yuzu_yuzu_1emu_NativeLibrary_stopEmulation(JNIEnv* env, jclass cla
     EmulationSession::GetInstance().HaltEmulation();
 }
 
-void Java_org_yuzu_yuzu_1emu_NativeLibrary_resetRomMetadata(JNIEnv* env, jclass clazz) {
-    EmulationSession::GetInstance().ResetRomMetadata();
-}
-
 jboolean Java_org_yuzu_yuzu_1emu_NativeLibrary_isRunning(JNIEnv* env, jclass clazz) {
     return static_cast<jboolean>(EmulationSession::GetInstance().IsRunning());
 }
@@ -667,46 +663,6 @@ void Java_org_yuzu_yuzu_1emu_NativeLibrary_onTouchReleased(JNIEnv* env, jclass c
     }
 }
 
-jbyteArray Java_org_yuzu_yuzu_1emu_NativeLibrary_getIcon(JNIEnv* env, jclass clazz,
-                                                         jstring j_filename) {
-    jauto icon_data = EmulationSession::GetInstance().GetRomIcon(GetJString(env, j_filename));
-    jbyteArray icon = env->NewByteArray(static_cast<jsize>(icon_data.size()));
-    env->SetByteArrayRegion(icon, 0, env->GetArrayLength(icon),
-                            reinterpret_cast<jbyte*>(icon_data.data()));
-    return icon;
-}
-
-jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getTitle(JNIEnv* env, jclass clazz,
-                                                       jstring j_filename) {
-    jauto title = EmulationSession::GetInstance().GetRomTitle(GetJString(env, j_filename));
-    return env->NewStringUTF(title.c_str());
-}
-
-jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getDescription(JNIEnv* env, jclass clazz,
-                                                             jstring j_filename) {
-    return j_filename;
-}
-
-jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getGameId(JNIEnv* env, jclass clazz,
-                                                        jstring j_filename) {
-    return j_filename;
-}
-
-jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getRegions(JNIEnv* env, jclass clazz,
-                                                         jstring j_filename) {
-    return env->NewStringUTF("");
-}
-
-jstring Java_org_yuzu_yuzu_1emu_NativeLibrary_getCompany(JNIEnv* env, jclass clazz,
-                                                         jstring j_filename) {
-    return env->NewStringUTF("");
-}
-
-jboolean Java_org_yuzu_yuzu_1emu_NativeLibrary_isHomebrew(JNIEnv* env, jclass clazz,
-                                                          jstring j_filename) {
-    return EmulationSession::GetInstance().GetIsHomebrew(GetJString(env, j_filename));
-}
-
 void Java_org_yuzu_yuzu_1emu_NativeLibrary_initializeEmulation(JNIEnv* env, jclass clazz) {
     // Create the default config.ini.
     Config{};