1 files changed, 112 insertions, 0 deletions
diff --git a/src/android/app/src/main/jni/game_metadata.cpp b/src/android/app/src/main/jni/game_metadata.cpp
new file mode 100644
index 000000000..24d9df702
--- /dev/null
+++ b/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"