Move solution and projects to src

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountManager.cs

@@ -0,0 +1,241 @@
+using LibHac;
+using LibHac.Common;
+using LibHac.Fs;
+using LibHac.Fs.Shim;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    public class AccountManager
+    {
+        public static readonly UserId DefaultUserId = new UserId("00000000000000010000000000000000");
+
+        private readonly AccountSaveDataManager _accountSaveDataManager;
+
+        // Todo: The account service doesn't have the permissions to delete save data. Qlaunch takes care of deleting
+        // save data, so we're currently passing a client with full permissions. Consider moving save data deletion
+        // outside of the AccountManager.
+        private readonly HorizonClient _horizonClient;
+
+        private readonly ConcurrentDictionary<string, UserProfile> _profiles;
+        private UserProfile[] _storedOpenedUsers;
+
+        public UserProfile LastOpenedUser { get; private set; }
+
+        public AccountManager(HorizonClient horizonClient, string initialProfileName = null)
+        {
+            _horizonClient = horizonClient;
+
+            _profiles = new ConcurrentDictionary<string, UserProfile>();
+            _storedOpenedUsers = Array.Empty<UserProfile>();
+
+            _accountSaveDataManager = new AccountSaveDataManager(_profiles);
+
+            if (!_profiles.TryGetValue(DefaultUserId.ToString(), out _))
+            {
+                byte[] defaultUserImage = EmbeddedResources.Read("Ryujinx.HLE/HOS/Services/Account/Acc/DefaultUserImage.jpg");
+
+                AddUser("RyuPlayer", defaultUserImage, DefaultUserId);
+
+                OpenUser(DefaultUserId);
+            }
+            else
+            {
+                UserId commandLineUserProfileOverride = default;
+                if (!string.IsNullOrEmpty(initialProfileName))
+                {
+                    commandLineUserProfileOverride = _profiles.Values.FirstOrDefault(x => x.Name == initialProfileName)?.UserId ?? default;
+                    if (commandLineUserProfileOverride.IsNull)
+                        Logger.Warning?.Print(LogClass.Application, $"The command line specified profile named '{initialProfileName}' was not found");
+                }
+                OpenUser(commandLineUserProfileOverride.IsNull ? _accountSaveDataManager.LastOpened : commandLineUserProfileOverride);
+            }
+        }
+
+        public void AddUser(string name, byte[] image, UserId userId = new UserId())
+        {
+            if (userId.IsNull)
+            {
+                userId = new UserId(Guid.NewGuid().ToString().Replace("-", ""));
+            }
+
+            UserProfile profile = new UserProfile(userId, name, image);
+
+            _profiles.AddOrUpdate(userId.ToString(), profile, (key, old) => profile);
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void OpenUser(UserId userId)
+        {
+            if (_profiles.TryGetValue(userId.ToString(), out UserProfile profile))
+            {
+                // TODO: Support multiple open users ?
+                foreach (UserProfile userProfile in GetAllUsers())
+                {
+                    if (userProfile == LastOpenedUser)
+                    {
+                        userProfile.AccountState = AccountState.Closed;
+
+                        break;
+                    }
+                }
+
+                (LastOpenedUser = profile).AccountState = AccountState.Open;
+
+                _accountSaveDataManager.LastOpened = userId;
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void CloseUser(UserId userId)
+        {
+            if (_profiles.TryGetValue(userId.ToString(), out UserProfile profile))
+            {
+                profile.AccountState = AccountState.Closed;
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void OpenUserOnlinePlay(UserId userId)
+        {
+            if (_profiles.TryGetValue(userId.ToString(), out UserProfile profile))
+            {
+                // TODO: Support multiple open online users ?
+                foreach (UserProfile userProfile in GetAllUsers())
+                {
+                    if (userProfile == LastOpenedUser)
+                    {
+                        userProfile.OnlinePlayState = AccountState.Closed;
+
+                        break;
+                    }
+                }
+
+                profile.OnlinePlayState = AccountState.Open;
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void CloseUserOnlinePlay(UserId userId)
+        {
+            if (_profiles.TryGetValue(userId.ToString(), out UserProfile profile))
+            {
+                profile.OnlinePlayState = AccountState.Closed;
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void SetUserImage(UserId userId, byte[] image)
+        {
+            foreach (UserProfile userProfile in GetAllUsers())
+            {
+                if (userProfile.UserId == userId)
+                {
+                    userProfile.Image = image;
+
+                    break;
+                }
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void SetUserName(UserId userId, string name)
+        {
+            foreach (UserProfile userProfile in GetAllUsers())
+            {
+                if (userProfile.UserId == userId)
+                {
+                    userProfile.Name = name;
+
+                    break;
+                }
+            }
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        public void DeleteUser(UserId userId)
+        {
+            DeleteSaveData(userId);
+
+            _profiles.Remove(userId.ToString(), out _);
+
+            OpenUser(DefaultUserId);
+
+            _accountSaveDataManager.Save(_profiles);
+        }
+
+        private void DeleteSaveData(UserId userId)
+        {
+            var saveDataFilter = SaveDataFilter.Make(programId: default, saveType: default,
+                new LibHac.Fs.UserId((ulong)userId.High, (ulong)userId.Low), saveDataId: default, index: default);
+
+            using var saveDataIterator = new UniqueRef<SaveDataIterator>();
+
+            _horizonClient.Fs.OpenSaveDataIterator(ref saveDataIterator.Ref, SaveDataSpaceId.User, in saveDataFilter).ThrowIfFailure();
+
+            Span<SaveDataInfo> saveDataInfo = stackalloc SaveDataInfo[10];
+
+            while (true)
+            {
+                saveDataIterator.Get.ReadSaveDataInfo(out long readCount, saveDataInfo).ThrowIfFailure();
+
+                if (readCount == 0)
+                {
+                    break;
+                }
+
+                for (int i = 0; i < readCount; i++)
+                {
+                    _horizonClient.Fs.DeleteSaveData(SaveDataSpaceId.User, saveDataInfo[i].SaveDataId).ThrowIfFailure();
+                }
+            }
+        }
+
+        internal int GetUserCount()
+        {
+            return _profiles.Count;
+        }
+
+        internal bool TryGetUser(UserId userId, out UserProfile profile)
+        {
+            return _profiles.TryGetValue(userId.ToString(), out profile);
+        }
+
+        public IEnumerable<UserProfile> GetAllUsers()
+        {
+            return _profiles.Values;
+        }
+
+        internal IEnumerable<UserProfile> GetOpenedUsers()
+        {
+            return _profiles.Values.Where(x => x.AccountState == AccountState.Open);
+        }
+
+        internal IEnumerable<UserProfile> GetStoredOpenedUsers()
+        {
+            return _storedOpenedUsers;
+        }
+
+        internal void StoreOpenedUsers()
+        {
+            _storedOpenedUsers = _profiles.Values.Where(x => x.AccountState == AccountState.Open).ToArray();
+        }
+
+        internal UserProfile GetFirst()
+        {
+            return _profiles.First().Value;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountSaveDataManager.cs

@@ -0,0 +1,76 @@
+using Ryujinx.Common.Configuration;
+using Ryujinx.Common.Logging;
+using Ryujinx.Common.Utilities;
+using Ryujinx.HLE.HOS.Services.Account.Acc.Types;
+using System;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    class AccountSaveDataManager
+    {
+        private readonly string _profilesJsonPath = Path.Join(AppDataManager.BaseDirPath, "system", "Profiles.json");
+
+        private static readonly ProfilesJsonSerializerContext SerializerContext = new(JsonHelper.GetDefaultSerializerOptions());
+
+        public UserId LastOpened { get; set; }
+
+        public AccountSaveDataManager(ConcurrentDictionary<string, UserProfile> profiles)
+        {
+            // TODO: Use 0x8000000000000010 system savedata instead of a JSON file if needed.
+
+            if (File.Exists(_profilesJsonPath))
+            {
+                try 
+                {
+                    ProfilesJson profilesJson = JsonHelper.DeserializeFromFile(_profilesJsonPath, SerializerContext.ProfilesJson);
+
+                    foreach (var profile in profilesJson.Profiles)
+                    {
+                        UserProfile addedProfile = new UserProfile(new UserId(profile.UserId), profile.Name, profile.Image, profile.LastModifiedTimestamp);
+
+                        profiles.AddOrUpdate(profile.UserId, addedProfile, (key, old) => addedProfile);
+                    }
+
+                    LastOpened = new UserId(profilesJson.LastOpened);
+                }
+                catch (Exception e) 
+                {
+                    Logger.Error?.Print(LogClass.Application, $"Failed to parse {_profilesJsonPath}: {e.Message} Loading default profile!");
+
+                    LastOpened = AccountManager.DefaultUserId;
+                }
+            }
+            else
+            {
+                LastOpened = AccountManager.DefaultUserId;
+            }
+        }
+
+        public void Save(ConcurrentDictionary<string, UserProfile> profiles)
+        {
+            ProfilesJson profilesJson = new ProfilesJson()
+            {
+                Profiles   = new List<UserProfileJson>(),
+                LastOpened = LastOpened.ToString()
+            };
+
+            foreach (var profile in profiles)
+            {
+                profilesJson.Profiles.Add(new UserProfileJson()
+                {
+                    UserId                = profile.Value.UserId.ToString(),
+                    Name                  = profile.Value.Name,
+                    AccountState          = profile.Value.AccountState,
+                    OnlinePlayState       = profile.Value.OnlinePlayState,
+                    LastModifiedTimestamp = profile.Value.LastModifiedTimestamp,
+                    Image                 = profile.Value.Image,
+                });
+            }
+
+            JsonHelper.SerializeToFile(_profilesJsonPath, profilesJson, SerializerContext.ProfilesJson);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/IManagerForApplication.cs

@@ -0,0 +1,75 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class IManagerForApplication : IpcService
+    {
+        private ManagerServer _managerServer;
+
+        public IManagerForApplication(UserId userId)
+        {
+            _managerServer = new ManagerServer(userId);
+        }
+
+        [CommandCmif(0)]
+        // CheckAvailability()
+        public ResultCode CheckAvailability(ServiceCtx context)
+        {
+            return _managerServer.CheckAvailability(context);
+        }
+
+        [CommandCmif(1)]
+        // GetAccountId() -> nn::account::NetworkServiceAccountId
+        public ResultCode GetAccountId(ServiceCtx context)
+        {
+            return _managerServer.GetAccountId(context);
+        }
+
+        [CommandCmif(2)]
+        // EnsureIdTokenCacheAsync() -> object<nn::account::detail::IAsyncContext>
+        public ResultCode EnsureIdTokenCacheAsync(ServiceCtx context)
+        {
+            ResultCode resultCode = _managerServer.EnsureIdTokenCacheAsync(context, out IAsyncContext asyncContext);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, asyncContext);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(3)]
+        // LoadIdTokenCache() -> (u32 id_token_cache_size, buffer<bytes, 6>)
+        public ResultCode LoadIdTokenCache(ServiceCtx context)
+        {
+            return _managerServer.LoadIdTokenCache(context);
+        }
+
+        [CommandCmif(130)]
+        // GetNintendoAccountUserResourceCacheForApplication() -> (nn::account::NintendoAccountId, nn::account::nas::NasUserBaseForApplication, buffer<bytes, 6>)
+        public ResultCode GetNintendoAccountUserResourceCacheForApplication(ServiceCtx context)
+        {
+            return _managerServer.GetNintendoAccountUserResourceCacheForApplication(context);
+        }
+
+        [CommandCmif(160)] // 5.0.0+
+        // StoreOpenContext()
+        public ResultCode StoreOpenContext(ServiceCtx context)
+        {
+            return _managerServer.StoreOpenContext(context);
+        }
+
+        [CommandCmif(170)] // 6.0.0+
+        // LoadNetworkServiceLicenseKindAsync() -> object<nn::account::detail::IAsyncNetworkServiceLicenseKindContext>
+        public ResultCode LoadNetworkServiceLicenseKindAsync(ServiceCtx context)
+        {
+            ResultCode resultCode = _managerServer.LoadNetworkServiceLicenseKindAsync(context, out IAsyncNetworkServiceLicenseKindContext asyncContext);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, asyncContext);
+            }
+
+            return resultCode;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/IManagerForSystemService.cs

@@ -0,0 +1,47 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class IManagerForSystemService : IpcService
+    {
+        private ManagerServer _managerServer;
+
+        public IManagerForSystemService(UserId userId)
+        {
+            _managerServer = new ManagerServer(userId);
+        }
+
+        [CommandCmif(0)]
+        // CheckAvailability()
+        public ResultCode CheckAvailability(ServiceCtx context)
+        {
+            return _managerServer.CheckAvailability(context);
+        }
+
+        [CommandCmif(1)]
+        // GetAccountId() -> nn::account::NetworkServiceAccountId
+        public ResultCode GetAccountId(ServiceCtx context)
+        {
+            return _managerServer.GetAccountId(context);
+        }
+
+        [CommandCmif(2)]
+        // EnsureIdTokenCacheAsync() -> object<nn::account::detail::IAsyncContext>
+        public ResultCode EnsureIdTokenCacheAsync(ServiceCtx context)
+        {
+            ResultCode resultCode = _managerServer.EnsureIdTokenCacheAsync(context, out IAsyncContext asyncContext);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, asyncContext);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(3)]
+        // LoadIdTokenCache() -> (u32 id_token_cache_size, buffer<bytes, 6>)
+        public ResultCode LoadIdTokenCache(ServiceCtx context)
+        {
+            return _managerServer.LoadIdTokenCache(context);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/IProfile.cs

@@ -0,0 +1,40 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class IProfile : IpcService
+    {
+        private ProfileServer _profileServer;
+
+        public IProfile(UserProfile profile)
+        {
+            _profileServer = new ProfileServer(profile);
+        }
+
+        [CommandCmif(0)]
+        // Get() -> (nn::account::profile::ProfileBase, buffer<nn::account::profile::UserData, 0x1a>)
+        public ResultCode Get(ServiceCtx context)
+        {
+            return _profileServer.Get(context);
+        }
+
+        [CommandCmif(1)]
+        // GetBase() -> nn::account::profile::ProfileBase
+        public ResultCode GetBase(ServiceCtx context)
+        {
+            return _profileServer.GetBase(context);
+        }
+
+        [CommandCmif(10)]
+        // GetImageSize() -> u32
+        public ResultCode GetImageSize(ServiceCtx context)
+        {
+            return _profileServer.GetImageSize(context);
+        }
+
+        [CommandCmif(11)]
+        // LoadImage() -> (u32, buffer<bytes, 6>)
+        public ResultCode LoadImage(ServiceCtx context)
+        {
+            return _profileServer.LoadImage(context);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/IProfileEditor.cs

@@ -0,0 +1,54 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class IProfileEditor : IpcService
+    {
+        private ProfileServer _profileServer;
+
+        public IProfileEditor(UserProfile profile)
+        {
+            _profileServer = new ProfileServer(profile);
+        }
+
+        [CommandCmif(0)]
+        // Get() -> (nn::account::profile::ProfileBase, buffer<nn::account::profile::UserData, 0x1a>)
+        public ResultCode Get(ServiceCtx context)
+        {
+            return _profileServer.Get(context);
+        }
+
+        [CommandCmif(1)]
+        // GetBase() -> nn::account::profile::ProfileBase
+        public ResultCode GetBase(ServiceCtx context)
+        {
+            return _profileServer.GetBase(context);
+        }
+
+        [CommandCmif(10)]
+        // GetImageSize() -> u32
+        public ResultCode GetImageSize(ServiceCtx context)
+        {
+            return _profileServer.GetImageSize(context);
+        }
+
+        [CommandCmif(11)]
+        // LoadImage() -> (u32, buffer<bytes, 6>)
+        public ResultCode LoadImage(ServiceCtx context)
+        {
+            return _profileServer.LoadImage(context);
+        }
+
+        [CommandCmif(100)]
+        // Store(nn::account::profile::ProfileBase, buffer<nn::account::profile::UserData, 0x19>)
+        public ResultCode Store(ServiceCtx context)
+        {
+            return _profileServer.Store(context);
+        }
+
+        [CommandCmif(101)]
+        // StoreWithImage(nn::account::profile::ProfileBase, buffer<nn::account::profile::UserData, 0x19>, buffer<bytes, 5>)
+        public ResultCode StoreWithImage(ServiceCtx context)
+        {
+            return _profileServer.StoreWithImage(context);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/ManagerServer.cs

@@ -0,0 +1,187 @@
+using Microsoft.IdentityModel.Tokens;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext;
+using System;
+using System.IdentityModel.Tokens.Jwt;
+using System.Security.Cryptography;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class ManagerServer
+    {
+        // TODO: Determine where and how NetworkServiceAccountId is set.
+        private const long NetworkServiceAccountId = 0xcafe;
+
+        private UserId _userId;
+
+        public ManagerServer(UserId userId)
+        {
+            _userId = userId;
+        }
+
+        private static string GenerateIdToken()
+        {
+            using RSA provider = RSA.Create(2048);
+
+            RSAParameters parameters = provider.ExportParameters(true);
+
+            RsaSecurityKey secKey = new RsaSecurityKey(parameters);
+
+            SigningCredentials credentials = new SigningCredentials(secKey, "RS256");
+
+            credentials.Key.KeyId = parameters.ToString();
+
+            var header = new JwtHeader(credentials)
+            {
+                { "jku", "https://e0d67c509fb203858ebcb2fe3f88c2aa.baas.nintendo.com/1.0.0/certificates" }
+            };
+
+            byte[] rawUserId = new byte[0x10];
+            RandomNumberGenerator.Fill(rawUserId);
+
+            byte[] deviceId = new byte[0x10];
+            RandomNumberGenerator.Fill(deviceId);
+
+            byte[] deviceAccountId = new byte[0x10];
+            RandomNumberGenerator.Fill(deviceId);
+
+            var payload = new JwtPayload
+            {
+                { "sub", Convert.ToHexString(rawUserId).ToLower() },
+                { "aud", "ed9e2f05d286f7b8" },
+                { "di", Convert.ToHexString(deviceId).ToLower() },
+                { "sn", "XAW10000000000" },
+                { "bs:did", Convert.ToHexString(deviceAccountId).ToLower() },
+                { "iss", "https://e0d67c509fb203858ebcb2fe3f88c2aa.baas.nintendo.com" },
+                { "typ", "id_token" },
+                { "iat", DateTimeOffset.UtcNow.ToUnixTimeSeconds() },
+                { "jti", Guid.NewGuid().ToString() },
+                { "exp", (DateTimeOffset.UtcNow + TimeSpan.FromHours(3)).ToUnixTimeSeconds() }
+            };
+
+            JwtSecurityToken securityToken = new JwtSecurityToken(header, payload);
+
+            return new JwtSecurityTokenHandler().WriteToken(securityToken);
+        }
+
+        public ResultCode CheckAvailability(ServiceCtx context)
+        {
+            // NOTE: This opens the file at "su/baas/USERID_IN_UUID_STRING.dat" where USERID_IN_UUID_STRING is formatted as "%08x-%04x-%04x-%02x%02x-%08x%04x".
+            //       Then it searches the Availability of Online Services related to the UserId in this file and returns it.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            // NOTE: Even if we try to return different error codes here, the guest still needs other calls.
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetAccountId(ServiceCtx context)
+        {
+            // NOTE: This opens the file at "su/baas/USERID_IN_UUID_STRING.dat" (where USERID_IN_UUID_STRING is formatted
+            //       as "%08x-%04x-%04x-%02x%02x-%08x%04x") in the account:/ savedata.
+            //       Then it searches the NetworkServiceAccountId related to the UserId in this file and returns it.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { NetworkServiceAccountId });
+
+            context.ResponseData.Write(NetworkServiceAccountId);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode EnsureIdTokenCacheAsync(ServiceCtx context, out IAsyncContext asyncContext)
+        {
+            KEvent         asyncEvent     = new KEvent(context.Device.System.KernelContext);
+            AsyncExecution asyncExecution = new AsyncExecution(asyncEvent);
+
+            asyncExecution.Initialize(1000, EnsureIdTokenCacheAsyncImpl);
+
+            asyncContext = new IAsyncContext(asyncExecution);
+
+            // return ResultCode.NullObject if the IAsyncContext pointer is null. Doesn't occur in our case.
+
+            return ResultCode.Success;
+        }
+
+        private async Task EnsureIdTokenCacheAsyncImpl(CancellationToken token)
+        {
+            // NOTE: This open the file at "su/baas/USERID_IN_UUID_STRING.dat" (where USERID_IN_UUID_STRING is formatted as "%08x-%04x-%04x-%02x%02x-%08x%04x")
+            //       in the "account:/" savedata.
+            //       Then its read data, use dauth API with this data to get the Token Id and probably store the dauth response
+            //       in "su/cache/USERID_IN_UUID_STRING.dat" (where USERID_IN_UUID_STRING is formatted as "%08x-%04x-%04x-%02x%02x-%08x%04x") in the "account:/" savedata.
+            //       Since we don't support online services, we can stub it.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            // TODO: Use a real function instead, with the CancellationToken.
+            await Task.CompletedTask;
+        }
+
+        public ResultCode LoadIdTokenCache(ServiceCtx context)
+        {
+            ulong bufferPosition = context.Request.ReceiveBuff[0].Position;
+            ulong bufferSize     = context.Request.ReceiveBuff[0].Size;
+
+            // NOTE: This opens the file at "su/cache/USERID_IN_UUID_STRING.dat" (where USERID_IN_UUID_STRING is formatted as "%08x-%04x-%04x-%02x%02x-%08x%04x")
+            //       in the "account:/" savedata and writes some data in the buffer.
+            //       Since we don't support online services, we can stub it.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            /*
+            if (internal_object != null)
+            {
+                if (bufferSize > 0xC00)
+                {
+                    return ResultCode.InvalidIdTokenCacheBufferSize;
+                }
+            }
+            */
+
+            byte[] tokenData = Encoding.ASCII.GetBytes(GenerateIdToken());
+
+            context.Memory.Write(bufferPosition, tokenData);
+            context.ResponseData.Write(tokenData.Length);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetNintendoAccountUserResourceCacheForApplication(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { NetworkServiceAccountId });
+
+            context.ResponseData.Write(NetworkServiceAccountId);
+
+            // TODO: determine and fill the output IPC buffer.
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode StoreOpenContext(ServiceCtx context)
+        {
+            context.Device.System.AccountManager.StoreOpenedUsers();
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode LoadNetworkServiceLicenseKindAsync(ServiceCtx context, out IAsyncNetworkServiceLicenseKindContext asyncContext)
+        {
+            KEvent asyncEvent = new KEvent(context.Device.System.KernelContext);
+            AsyncExecution asyncExecution = new AsyncExecution(asyncEvent);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            // NOTE: This is an extension of the data retrieved from the id token cache.
+            asyncExecution.Initialize(1000, EnsureIdTokenCacheAsyncImpl);
+
+            asyncContext = new IAsyncNetworkServiceLicenseKindContext(asyncExecution, NetworkServiceLicenseKind.Subscribed);
+
+            // return ResultCode.NullObject if the IAsyncNetworkServiceLicenseKindContext pointer is null. Doesn't occur in our case.
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AccountService/ProfileServer.cs

@@ -0,0 +1,114 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.Utilities;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AccountService
+{
+    class ProfileServer
+    {
+        private UserProfile _profile;
+
+        public ProfileServer(UserProfile profile)
+        {
+            _profile = profile;
+        }
+
+        public ResultCode Get(ServiceCtx context)
+        {
+            context.Response.PtrBuff[0] = context.Response.PtrBuff[0].WithSize(0x80UL);
+
+            ulong bufferPosition = context.Request.RecvListBuff[0].Position;
+
+            MemoryHelper.FillWithZeros(context.Memory, bufferPosition, 0x80);
+
+            // TODO: Determine the struct.
+            context.Memory.Write(bufferPosition,           0); // Unknown
+            context.Memory.Write(bufferPosition + 4,       1); // Icon ID. 0 = Mii, the rest are character icon IDs.
+            context.Memory.Write(bufferPosition + 8, (byte)1); // Profile icon background color ID
+            // 0x07 bytes - Unknown
+            // 0x10 bytes - Some ID related to the Mii? All zeros when a character icon is used.
+            // 0x60 bytes - Usually zeros?
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            return GetBase(context);
+        }
+
+        public ResultCode GetBase(ServiceCtx context)
+        {
+            _profile.UserId.Write(context.ResponseData);
+
+            context.ResponseData.Write(_profile.LastModifiedTimestamp);
+
+            byte[] username = StringUtils.GetFixedLengthBytes(_profile.Name, 0x20, Encoding.UTF8);
+
+            context.ResponseData.Write(username);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetImageSize(ServiceCtx context)
+        {
+            context.ResponseData.Write(_profile.Image.Length);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode LoadImage(ServiceCtx context)
+        {
+            ulong bufferPosition = context.Request.ReceiveBuff[0].Position;
+            ulong bufferLen      = context.Request.ReceiveBuff[0].Size;
+
+            if ((ulong)_profile.Image.Length > bufferLen)
+            {
+                return ResultCode.InvalidBufferSize;
+            }
+
+            context.Memory.Write(bufferPosition, _profile.Image);
+
+            context.ResponseData.Write(_profile.Image.Length);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode Store(ServiceCtx context)
+        {
+            ulong userDataPosition = context.Request.PtrBuff[0].Position;
+            ulong userDataSize     = context.Request.PtrBuff[0].Size;
+
+            byte[] userData = new byte[userDataSize];
+
+            context.Memory.Read(userDataPosition, userData);
+
+            // TODO: Read the nn::account::profile::ProfileBase and store everything in the savedata.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { userDataSize });
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode StoreWithImage(ServiceCtx context)
+        {
+            ulong userDataPosition = context.Request.PtrBuff[0].Position;
+            ulong userDataSize     = context.Request.PtrBuff[0].Size;
+
+            byte[] userData = new byte[userDataSize];
+
+            context.Memory.Read(userDataPosition, userData);
+
+            ulong profileImagePosition = context.Request.SendBuff[0].Position;
+            ulong profileImageSize     = context.Request.SendBuff[0].Size;
+
+            byte[] profileImageData = new byte[profileImageSize];
+
+            context.Memory.Read(profileImagePosition, profileImageData);
+
+            // TODO: Read the nn::account::profile::ProfileBase and store everything in the savedata.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { userDataSize, profileImageSize });
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/ApplicationServiceServer.cs

@@ -0,0 +1,254 @@
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AccountService;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext;
+using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    class ApplicationServiceServer
+    {
+        readonly AccountServiceFlag _serviceFlag;
+
+        public ApplicationServiceServer(AccountServiceFlag serviceFlag)
+        {
+            _serviceFlag = serviceFlag;
+        }
+
+        public ResultCode GetUserCountImpl(ServiceCtx context)
+        {
+            context.ResponseData.Write(context.Device.System.AccountManager.GetUserCount());
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetUserExistenceImpl(ServiceCtx context)
+        {
+            ResultCode resultCode = CheckUserId(context, out UserId userId);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            context.ResponseData.Write(context.Device.System.AccountManager.TryGetUser(userId, out _));
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode ListAllUsers(ServiceCtx context)
+        {
+            return WriteUserList(context, context.Device.System.AccountManager.GetAllUsers());
+        }
+
+        public ResultCode ListOpenUsers(ServiceCtx context)
+        {
+            return WriteUserList(context, context.Device.System.AccountManager.GetOpenedUsers());
+        }
+
+        private ResultCode WriteUserList(ServiceCtx context, IEnumerable<UserProfile> profiles)
+        {
+            if (context.Request.RecvListBuff.Count == 0)
+            {
+                return ResultCode.InvalidBuffer;
+            }
+
+            ulong outputPosition = context.Request.RecvListBuff[0].Position;
+            ulong outputSize     = context.Request.RecvListBuff[0].Size;
+
+            MemoryHelper.FillWithZeros(context.Memory, outputPosition, (int)outputSize);
+
+            ulong offset = 0;
+
+            foreach (UserProfile userProfile in profiles)
+            {
+                if (offset + 0x10 > outputSize)
+                {
+                    break;
+                }
+
+                context.Memory.Write(outputPosition + offset,     userProfile.UserId.High);
+                context.Memory.Write(outputPosition + offset + 8, userProfile.UserId.Low);
+
+                offset += 0x10;
+            }
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetLastOpenedUser(ServiceCtx context)
+        {
+            context.Device.System.AccountManager.LastOpenedUser.UserId.Write(context.ResponseData);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode GetProfile(ServiceCtx context, out IProfile profile)
+        {
+            profile = default;
+
+            ResultCode resultCode = CheckUserId(context, out UserId userId);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            if (!context.Device.System.AccountManager.TryGetUser(userId, out UserProfile userProfile))
+            {
+                Logger.Warning?.Print(LogClass.ServiceAcc, $"User 0x{userId} not found!");
+
+                return ResultCode.UserNotFound;
+            }
+
+            profile = new IProfile(userProfile);
+
+            // Doesn't occur in our case.
+            // return ResultCode.NullObject;
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode IsUserRegistrationRequestPermitted(ServiceCtx context)
+        {
+            context.ResponseData.Write(_serviceFlag != AccountServiceFlag.Application);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode TrySelectUserWithoutInteraction(ServiceCtx context)
+        {
+            if (context.Device.System.AccountManager.GetUserCount() < 1)
+            {
+                // Invalid UserId.
+                UserId.Null.Write(context.ResponseData);
+
+                return ResultCode.UserNotFound;
+            }
+
+            bool isNetworkServiceAccountRequired = context.RequestData.ReadBoolean();
+
+            if (isNetworkServiceAccountRequired)
+            {
+                // NOTE: This checks something related to baas (online), and then return an invalid UserId if the check in baas returns an error code.
+                //       In our case, we can just log it for now.
+
+                Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { isNetworkServiceAccountRequired });
+            }
+
+            // NOTE: As we returned an invalid UserId if there is more than one user earlier, now we can return only the first one.
+            context.Device.System.AccountManager.GetFirst().UserId.Write(context.ResponseData);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode CheckNetworkServiceAvailabilityAsync(ServiceCtx context, out IAsyncContext asyncContext)
+        {
+            KEvent         asyncEvent     = new(context.Device.System.KernelContext);
+            AsyncExecution asyncExecution = new(asyncEvent);
+
+            asyncExecution.Initialize(1000, CheckNetworkServiceAvailabilityAsyncImpl);
+
+            asyncContext = new IAsyncContext(asyncExecution);
+
+            // return ResultCode.NullObject if the IAsyncContext pointer is null. Doesn't occur in our case.
+
+            return ResultCode.Success;
+        }
+
+        private async Task CheckNetworkServiceAvailabilityAsyncImpl(CancellationToken token)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            // TODO: Use a real function instead, with the CancellationToken.
+            await Task.CompletedTask;
+        }
+
+        public ResultCode StoreSaveDataThumbnail(ServiceCtx context)
+        {
+            ResultCode resultCode = CheckUserId(context, out UserId _);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            if (context.Request.SendBuff.Count == 0)
+            {
+                return ResultCode.InvalidBuffer;
+            }
+
+            ulong inputPosition = context.Request.SendBuff[0].Position;
+            ulong inputSize     = context.Request.SendBuff[0].Size;
+
+            if (inputSize != 0x24000)
+            {
+                return ResultCode.InvalidBufferSize;
+            }
+
+            byte[] thumbnailBuffer = new byte[inputSize];
+
+            context.Memory.Read(inputPosition, thumbnailBuffer);
+
+            // NOTE: Account service call nn::fs::WriteSaveDataThumbnailFile().
+            // TODO: Store thumbnailBuffer somewhere, in save data 0x8000000000000010 ?
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode ClearSaveDataThumbnail(ServiceCtx context)
+        {
+            ResultCode resultCode = CheckUserId(context, out UserId _);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            /*
+            // NOTE: Doesn't occur in our case.
+            if (userId == null)
+            {
+                return ResultCode.InvalidArgument;
+            }
+            */
+
+            // NOTE: Account service call nn::fs::WriteSaveDataThumbnailFileHeader();
+            // TODO: Clear the Thumbnail somewhere, in save data 0x8000000000000010 ?
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode ListOpenContextStoredUsers(ServiceCtx context)
+        {
+            return WriteUserList(context, context.Device.System.AccountManager.GetStoredOpenedUsers());
+        }
+
+        public ResultCode ListQualifiedUsers(ServiceCtx context)
+        {
+            // TODO: Determine how users are "qualified". We assume all users are "qualified" for now.
+
+            return WriteUserList(context, context.Device.System.AccountManager.GetAllUsers());
+        }
+
+        public ResultCode CheckUserId(ServiceCtx context, out UserId userId)
+        {
+            userId = context.RequestData.ReadStruct<UserId>();
+
+            if (userId.IsNull)
+            {
+                return ResultCode.NullArgument;
+            }
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/AsyncContext/AsyncExecution.cs

@@ -0,0 +1,56 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext
+{
+    class AsyncExecution
+    {
+        private readonly CancellationTokenSource _tokenSource;
+        private readonly CancellationToken       _token;
+
+        public KEvent SystemEvent   { get; }
+        public bool   IsInitialized { get; private set; }
+        public bool   IsRunning     { get; private set; }
+
+        public AsyncExecution(KEvent asyncEvent)
+        {
+            SystemEvent = asyncEvent;
+
+            _tokenSource = new CancellationTokenSource();
+            _token       = _tokenSource.Token;
+        }
+
+        public void Initialize(int timeout, Func<CancellationToken, Task> taskAsync)
+        {
+            Task.Run(async () =>
+            {
+                IsRunning = true;
+
+                _tokenSource.CancelAfter(timeout);
+
+                try
+                {
+                    await taskAsync(_token);
+                }
+                catch (Exception ex)
+                {
+                    Logger.Warning?.Print(LogClass.ServiceAcc, $"Exception: {ex.Message}");
+                }
+
+                SystemEvent.ReadableEvent.Signal();
+
+                IsRunning = false;
+            }, _token);
+
+            IsInitialized = true;
+        }
+
+        public void Cancel()
+        {
+            _tokenSource.Cancel();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IAccountServiceForAdministrator.cs

@@ -0,0 +1,129 @@
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AccountService;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [Service("acc:su", AccountServiceFlag.Administrator)] // Max Sessions: 8
+    class IAccountServiceForAdministrator : IpcService
+    {
+        private ApplicationServiceServer _applicationServiceServer;
+
+        public IAccountServiceForAdministrator(ServiceCtx context, AccountServiceFlag serviceFlag)
+        {
+            _applicationServiceServer = new ApplicationServiceServer(serviceFlag);
+        }
+
+        [CommandCmif(0)]
+        // GetUserCount() -> i32
+        public ResultCode GetUserCount(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserCountImpl(context);
+        }
+
+        [CommandCmif(1)]
+        // GetUserExistence(nn::account::Uid) -> bool
+        public ResultCode GetUserExistence(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserExistenceImpl(context);
+        }
+
+        [CommandCmif(2)]
+        // ListAllUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListAllUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListAllUsers(context);
+        }
+
+        [CommandCmif(3)]
+        // ListOpenUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListOpenUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListOpenUsers(context);
+        }
+
+        [CommandCmif(4)]
+        // GetLastOpenedUser() -> nn::account::Uid
+        public ResultCode GetLastOpenedUser(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetLastOpenedUser(context);
+        }
+
+        [CommandCmif(5)]
+        // GetProfile(nn::account::Uid) -> object<nn::account::profile::IProfile>
+        public ResultCode GetProfile(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.GetProfile(context, out IProfile iProfile);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, iProfile);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(50)]
+        // IsUserRegistrationRequestPermitted(pid) -> bool
+        public ResultCode IsUserRegistrationRequestPermitted(ServiceCtx context)
+        {
+            // NOTE: pid is unused.
+
+            return _applicationServiceServer.IsUserRegistrationRequestPermitted(context);
+        }
+
+        [CommandCmif(51)]
+        // TrySelectUserWithoutInteraction(bool) -> nn::account::Uid
+        public ResultCode TrySelectUserWithoutInteraction(ServiceCtx context)
+        {
+            return _applicationServiceServer.TrySelectUserWithoutInteraction(context);
+        }
+
+        [CommandCmif(102)]
+        // GetBaasAccountManagerForSystemService(nn::account::Uid) -> object<nn::account::baas::IManagerForApplication>
+        public ResultCode GetBaasAccountManagerForSystemService(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.CheckUserId(context, out UserId userId);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            MakeObject(context, new IManagerForSystemService(userId));
+
+            // Doesn't occur in our case.
+            // return ResultCode.NullObject;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(140)] // 6.0.0+
+        // ListQualifiedUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListQualifiedUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListQualifiedUsers(context);
+        }
+
+        [CommandCmif(205)]
+        // GetProfileEditor(nn::account::Uid) -> object<nn::account::profile::IProfileEditor>
+        public ResultCode GetProfileEditor(ServiceCtx context)
+        {
+            UserId userId = context.RequestData.ReadStruct<UserId>();
+
+            if (!context.Device.System.AccountManager.TryGetUser(userId, out UserProfile userProfile))
+            {
+                Logger.Warning?.Print(LogClass.ServiceAcc, $"User 0x{userId} not found!");
+
+                return ResultCode.UserNotFound;
+            }
+
+            MakeObject(context, new IProfileEditor(userProfile));
+
+            // Doesn't occur in our case.
+            // return ResultCode.NullObject;
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IAccountServiceForApplication.cs

@@ -0,0 +1,200 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AccountService;
+using Ryujinx.HLE.HOS.Services.Arp;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [Service("acc:u0", AccountServiceFlag.Application)] // Max Sessions: 4
+    class IAccountServiceForApplication : IpcService
+    {
+        private ApplicationServiceServer _applicationServiceServer;
+
+        public IAccountServiceForApplication(ServiceCtx context, AccountServiceFlag serviceFlag)
+        {
+            _applicationServiceServer = new ApplicationServiceServer(serviceFlag);
+        }
+
+        [CommandCmif(0)]
+        // GetUserCount() -> i32
+        public ResultCode GetUserCount(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserCountImpl(context);
+        }
+
+        [CommandCmif(1)]
+        // GetUserExistence(nn::account::Uid) -> bool
+        public ResultCode GetUserExistence(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserExistenceImpl(context);
+        }
+
+        [CommandCmif(2)]
+        // ListAllUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListAllUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListAllUsers(context);
+        }
+
+        [CommandCmif(3)]
+        // ListOpenUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListOpenUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListOpenUsers(context);
+        }
+
+        [CommandCmif(4)]
+        // GetLastOpenedUser() -> nn::account::Uid
+        public ResultCode GetLastOpenedUser(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetLastOpenedUser(context);
+        }
+
+        [CommandCmif(5)]
+        // GetProfile(nn::account::Uid) -> object<nn::account::profile::IProfile>
+        public ResultCode GetProfile(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.GetProfile(context, out IProfile iProfile);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, iProfile);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(50)]
+        // IsUserRegistrationRequestPermitted(pid) -> bool
+        public ResultCode IsUserRegistrationRequestPermitted(ServiceCtx context)
+        {
+            // NOTE: pid is unused.
+            return _applicationServiceServer.IsUserRegistrationRequestPermitted(context);
+        }
+
+        [CommandCmif(51)]
+        // TrySelectUserWithoutInteraction(bool) -> nn::account::Uid
+        public ResultCode TrySelectUserWithoutInteraction(ServiceCtx context)
+        {
+            return _applicationServiceServer.TrySelectUserWithoutInteraction(context);
+        }
+
+        [CommandCmif(100)]
+        [CommandCmif(140)] // 6.0.0+
+        [CommandCmif(160)] // 13.0.0+
+        // InitializeApplicationInfo(u64 pid_placeholder, pid)
+        public ResultCode InitializeApplicationInfo(ServiceCtx context)
+        {
+            // NOTE: In call 100, account service use the pid_placeholder instead of the real pid, which is wrong, call 140 fix that.
+
+            /*
+
+            // TODO: Account actually calls nn::arp::detail::IReader::GetApplicationLaunchProperty() with the current PID and store the result (ApplicationLaunchProperty) internally.
+            //       For now we can hardcode values, and fix it after GetApplicationLaunchProperty is implemented.
+            if (nn::arp::detail::IReader::GetApplicationLaunchProperty() == 0xCC9D) // ResultCode.InvalidProcessId
+            {
+                return ResultCode.InvalidArgument;
+            }
+
+            */
+
+            // TODO: Determine where ApplicationLaunchProperty is used.
+            ApplicationLaunchProperty applicationLaunchProperty = ApplicationLaunchProperty.GetByPid(context);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc, new { applicationLaunchProperty.TitleId });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(101)]
+        // GetBaasAccountManagerForApplication(nn::account::Uid) -> object<nn::account::baas::IManagerForApplication>
+        public ResultCode GetBaasAccountManagerForApplication(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.CheckUserId(context, out UserId userId);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            MakeObject(context, new IManagerForApplication(userId));
+
+            // Doesn't occur in our case.
+            // return ResultCode.NullObject;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(103)] // 4.0.0+
+        // CheckNetworkServiceAvailabilityAsync() -> object<nn::account::detail::IAsyncContext>
+        public ResultCode CheckNetworkServiceAvailabilityAsync(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.CheckNetworkServiceAvailabilityAsync(context, out IAsyncContext asyncContext);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, asyncContext);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(110)]
+        // StoreSaveDataThumbnail(nn::account::Uid, buffer<bytes, 5>)
+        public ResultCode StoreSaveDataThumbnail(ServiceCtx context)
+        {
+            return _applicationServiceServer.StoreSaveDataThumbnail(context);
+        }
+
+        [CommandCmif(111)]
+        // ClearSaveDataThumbnail(nn::account::Uid)
+        public ResultCode ClearSaveDataThumbnail(ServiceCtx context)
+        {
+            return _applicationServiceServer.ClearSaveDataThumbnail(context);
+        }
+
+        [CommandCmif(130)] // 5.0.0+
+        // LoadOpenContext(nn::account::Uid) -> object<nn::account::baas::IManagerForApplication>
+        public ResultCode LoadOpenContext(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.CheckUserId(context, out UserId userId);
+
+            if (resultCode != ResultCode.Success)
+            {
+                return resultCode;
+            }
+
+            MakeObject(context, new IManagerForApplication(userId));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(60)] // 5.0.0-5.1.0
+        [CommandCmif(131)] // 6.0.0+
+        // ListOpenContextStoredUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListOpenContextStoredUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListOpenContextStoredUsers(context);
+        }
+
+        [CommandCmif(141)] // 6.0.0+
+        // ListQualifiedUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListQualifiedUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListQualifiedUsers(context);
+        }
+
+        [CommandCmif(150)] // 6.0.0+
+        // IsUserAccountSwitchLocked() -> bool
+        public ResultCode IsUserAccountSwitchLocked(ServiceCtx context)
+        {
+            // TODO: Account actually calls nn::arp::detail::IReader::GetApplicationControlProperty() with the current Pid and store the result (NACP file) internally.
+            //       But since we use LibHac and we load one Application at a time, it's not necessary.
+
+            context.ResponseData.Write((byte)context.Device.Processes.ActiveApplication.ApplicationControlProperties.UserAccountSwitchLock);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAcc);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IAccountServiceForSystemService.cs

@@ -0,0 +1,107 @@
+using Ryujinx.Common;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AccountService;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [Service("acc:u1", AccountServiceFlag.SystemService)] // Max Sessions: 16
+    class IAccountServiceForSystemService : IpcService
+    {
+        private ApplicationServiceServer _applicationServiceServer;
+
+        public IAccountServiceForSystemService(ServiceCtx context, AccountServiceFlag serviceFlag)
+        {
+            _applicationServiceServer = new ApplicationServiceServer(serviceFlag);
+        }
+
+        [CommandCmif(0)]
+        // GetUserCount() -> i32
+        public ResultCode GetUserCount(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserCountImpl(context);
+        }
+
+        [CommandCmif(1)]
+        // GetUserExistence(nn::account::Uid) -> bool
+        public ResultCode GetUserExistence(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetUserExistenceImpl(context);
+        }
+
+        [CommandCmif(2)]
+        // ListAllUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListAllUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListAllUsers(context);
+        }
+
+        [CommandCmif(3)]
+        // ListOpenUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListOpenUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListOpenUsers(context);
+        }
+
+        [CommandCmif(4)]
+        // GetLastOpenedUser() -> nn::account::Uid
+        public ResultCode GetLastOpenedUser(ServiceCtx context)
+        {
+            return _applicationServiceServer.GetLastOpenedUser(context);
+        }
+
+        [CommandCmif(5)]
+        // GetProfile(nn::account::Uid) -> object<nn::account::profile::IProfile>
+        public ResultCode GetProfile(ServiceCtx context)
+        {
+            ResultCode resultCode = _applicationServiceServer.GetProfile(context, out IProfile iProfile);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, iProfile);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(50)]
+        // IsUserRegistrationRequestPermitted(pid) -> bool
+        public ResultCode IsUserRegistrationRequestPermitted(ServiceCtx context)
+        {
+            // NOTE: pid is unused.
+
+            return _applicationServiceServer.IsUserRegistrationRequestPermitted(context);
+        }
+
+        [CommandCmif(51)]
+        // TrySelectUserWithoutInteraction(bool) -> nn::account::Uid
+        public ResultCode TrySelectUserWithoutInteraction(ServiceCtx context)
+        {
+            return _applicationServiceServer.TrySelectUserWithoutInteraction(context);
+        }
+
+        [CommandCmif(102)]
+        // GetBaasAccountManagerForSystemService(nn::account::Uid) -> object<nn::account::baas::IManagerForApplication>
+        public ResultCode GetBaasAccountManagerForSystemService(ServiceCtx context)
+        {
+            UserId userId = context.RequestData.ReadStruct<UserId>();
+
+            if (userId.IsNull)
+            {
+                return ResultCode.NullArgument;
+            }
+
+            MakeObject(context, new IManagerForSystemService(userId));
+
+            // Doesn't occur in our case.
+            // return ResultCode.NullObject;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(140)] // 6.0.0+
+        // ListQualifiedUsers() -> array<nn::account::Uid, 0xa>
+        public ResultCode ListQualifiedUsers(ServiceCtx context)
+        {
+            return _applicationServiceServer.ListQualifiedUsers(context);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IAsyncContext.cs

@@ -0,0 +1,79 @@
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    class IAsyncContext : IpcService
+    {
+        protected AsyncExecution AsyncExecution;
+
+        public IAsyncContext(AsyncExecution asyncExecution)
+        {
+            AsyncExecution = asyncExecution;
+        }
+
+        [CommandCmif(0)]
+        // GetSystemEvent() -> handle<copy>
+        public ResultCode GetSystemEvent(ServiceCtx context)
+        {
+            if (context.Process.HandleTable.GenerateHandle(AsyncExecution.SystemEvent.ReadableEvent, out int _systemEventHandle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_systemEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // Cancel()
+        public ResultCode Cancel(ServiceCtx context)
+        {
+            if (!AsyncExecution.IsInitialized)
+            {
+                return ResultCode.AsyncExecutionNotInitialized;
+            }
+
+            if (AsyncExecution.IsRunning)
+            {
+                AsyncExecution.Cancel();
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // HasDone() -> b8
+        public ResultCode HasDone(ServiceCtx context)
+        {
+            if (!AsyncExecution.IsInitialized)
+            {
+                return ResultCode.AsyncExecutionNotInitialized;
+            }
+
+            context.ResponseData.Write(AsyncExecution.SystemEvent.ReadableEvent.IsSignaled());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)]
+        // GetResult()
+        public ResultCode GetResult(ServiceCtx context)
+        {
+            if (!AsyncExecution.IsInitialized)
+            {
+                return ResultCode.AsyncExecutionNotInitialized;
+            }
+
+            if (!AsyncExecution.SystemEvent.ReadableEvent.IsSignaled())
+            {
+                return ResultCode.Unknown41;
+            }
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IAsyncNetworkServiceLicenseKindContext.cs

@@ -0,0 +1,38 @@
+using Ryujinx.HLE.HOS.Services.Account.Acc.AsyncContext;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    class IAsyncNetworkServiceLicenseKindContext : IAsyncContext
+    {
+        private NetworkServiceLicenseKind? _serviceLicenseKind;
+
+        public IAsyncNetworkServiceLicenseKindContext(AsyncExecution asyncExecution, NetworkServiceLicenseKind? serviceLicenseKind) : base(asyncExecution)
+        {
+            _serviceLicenseKind = serviceLicenseKind;
+        }
+
+        [CommandCmif(100)]
+        // GetNetworkServiceLicenseKind() -> nn::account::NetworkServiceLicenseKind
+        public ResultCode GetNetworkServiceLicenseKind(ServiceCtx context)
+        {
+            if (!AsyncExecution.IsInitialized)
+            {
+                return ResultCode.AsyncExecutionNotInitialized;
+            }
+
+            if (!AsyncExecution.SystemEvent.ReadableEvent.IsSignaled())
+            {
+                return ResultCode.Unknown41;
+            }
+
+            if (!_serviceLicenseKind.HasValue)
+            {
+                return ResultCode.MissingNetworkServiceLicenseKind;
+            }
+
+            context.ResponseData.Write((uint)_serviceLicenseKind.Value);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/IBaasAccessTokenAccessor.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [Service("acc:aa", AccountServiceFlag.BaasAccessTokenAccessor)] // Max Sessions: 4
+    class IBaasAccessTokenAccessor : IpcService
+    {
+        public IBaasAccessTokenAccessor(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/ProfilesJsonSerializerContext.cs

@@ -0,0 +1,11 @@
+using Ryujinx.HLE.HOS.Services.Account.Acc.Types;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [JsonSourceGenerationOptions(WriteIndented = true)]
+    [JsonSerializable(typeof(ProfilesJson))]
+    internal partial class ProfilesJsonSerializerContext : JsonSerializerContext
+    {
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/AccountServiceFlag.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    enum AccountServiceFlag
+    {
+        Administrator           = 100,
+        SystemService           = 101,
+        Application             = 102,
+        BaasAccessTokenAccessor = 200
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/AccountState.cs

@@ -0,0 +1,12 @@
+using Ryujinx.Common.Utilities;
+using System.Text.Json.Serialization;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [JsonConverter(typeof(TypedStringEnumConverter<AccountState>))]
+    public enum AccountState
+    {
+        Closed,
+        Open
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/NetworkServiceLicenseKind.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    enum NetworkServiceLicenseKind : uint
+    {
+        NoSubscription,
+        Subscribed
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/ProfilesJson.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.Types
+{
+    internal struct ProfilesJson
+    {
+        public List<UserProfileJson> Profiles { get; set; }
+        public string LastOpened { get; set; }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/UserId.cs

@@ -0,0 +1,64 @@
+using LibHac.Account;
+using System;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public readonly record struct UserId
+    {
+        public readonly long High;
+        public readonly long Low;
+
+        public bool IsNull => (Low | High) == 0;
+
+        public static UserId Null => new UserId(0, 0);
+
+        public UserId(long low, long high)
+        {
+            Low  = low;
+            High = high;
+        }
+
+        public UserId(byte[] bytes)
+        {
+            High = BitConverter.ToInt64(bytes, 0);
+            Low  = BitConverter.ToInt64(bytes, 8);
+        }
+
+        public UserId(string hex)
+        {
+            if (hex == null || hex.Length != 32 || !hex.All("0123456789abcdefABCDEF".Contains))
+            {
+                throw new ArgumentException("Invalid Hex value!", nameof(hex));
+            }
+
+            Low  = long.Parse(hex.AsSpan(16), NumberStyles.HexNumber);
+            High = long.Parse(hex.AsSpan(0, 16), NumberStyles.HexNumber);
+        }
+
+        public void Write(BinaryWriter binaryWriter)
+        {
+            binaryWriter.Write(High);
+            binaryWriter.Write(Low);
+        }
+
+        public override string ToString()
+        {
+            return High.ToString("x16") + Low.ToString("x16");
+        }
+
+        public Uid ToLibHacUid()
+        {
+            return new Uid((ulong)High, (ulong)Low);
+        }
+
+        public UInt128 ToUInt128()
+        {
+            return new UInt128((ulong)High, (ulong)Low);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/UserProfile.cs

@@ -0,0 +1,87 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Account.Acc
+{
+    public class UserProfile
+    {
+        public UserId UserId { get; }
+
+        public long LastModifiedTimestamp { get; set; }
+
+        private string _name;
+
+        public string Name
+        {
+            get => _name;
+            set
+            {
+                _name = value;
+
+                UpdateLastModifiedTimestamp();
+            }
+        }
+
+        private byte[] _image;
+
+        public byte[] Image
+        {
+            get => _image;
+            set
+            {
+                _image = value;
+
+                UpdateLastModifiedTimestamp();
+            }
+        }
+
+        private AccountState _accountState;
+
+        public AccountState AccountState
+        {
+            get => _accountState;
+            set
+            {
+                _accountState = value;
+
+                UpdateLastModifiedTimestamp();
+            }
+        }
+
+        public AccountState _onlinePlayState;
+
+        public AccountState OnlinePlayState
+        {
+            get => _onlinePlayState;
+            set
+            {
+                _onlinePlayState = value;
+
+                UpdateLastModifiedTimestamp();
+            }
+        }
+
+        public UserProfile(UserId userId, string name, byte[] image, long lastModifiedTimestamp = 0)
+        {
+            UserId = userId;
+            Name   = name;
+            Image  = image;
+
+            AccountState    = AccountState.Closed;
+            OnlinePlayState = AccountState.Closed;
+
+            if (lastModifiedTimestamp != 0)
+            {
+                LastModifiedTimestamp = lastModifiedTimestamp;
+            }
+            else
+            {
+                UpdateLastModifiedTimestamp();
+            }
+        }
+
+        private void UpdateLastModifiedTimestamp()
+        {
+            LastModifiedTimestamp = (long)(DateTime.Now - DateTime.UnixEpoch).TotalSeconds;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Acc/Types/UserProfileJson.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Acc.Types
+{
+    internal struct UserProfileJson
+    {
+        public string UserId { get; set; }
+        public string Name { get; set; }
+        public AccountState AccountState { get; set; }
+        public AccountState OnlinePlayState { get; set; }
+        public long LastModifiedTimestamp { get; set; }
+        public byte[] Image { get; set; }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/Dauth/IService.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Account.Dauth
+{
+    [Service("dauth:0")] // 5.0.0+
+    class IService : IpcService
+    {
+        public IService(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Account/ResultCode.cs

@@ -0,0 +1,24 @@
+namespace Ryujinx.HLE.HOS.Services.Account
+{
+    enum ResultCode
+    {
+        ModuleId       = 124,
+        ErrorCodeShift = 9,
+
+        Success = 0,
+
+        NullArgument                     = (20  << ErrorCodeShift) | ModuleId,
+        InvalidArgument                  = (22  << ErrorCodeShift) | ModuleId,
+        NullInputBuffer                  = (30  << ErrorCodeShift) | ModuleId,
+        InvalidBufferSize                = (31  << ErrorCodeShift) | ModuleId,
+        InvalidBuffer                    = (32  << ErrorCodeShift) | ModuleId,
+        AsyncExecutionNotInitialized     = (40  << ErrorCodeShift) | ModuleId,
+        Unknown41                        = (41  << ErrorCodeShift) | ModuleId,
+        InternetRequestDenied            = (59  << ErrorCodeShift) | ModuleId,
+        UserNotFound                     = (100 << ErrorCodeShift) | ModuleId,
+        NullObject                       = (302 << ErrorCodeShift) | ModuleId,
+        Unknown341                       = (341 << ErrorCodeShift) | ModuleId,
+        MissingNetworkServiceLicenseKind = (400 << ErrorCodeShift) | ModuleId,
+        InvalidIdTokenCacheBufferSize    = (451 << ErrorCodeShift) | ModuleId
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/ILibraryAppletProxy.cs

@@ -0,0 +1,105 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletProxy;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService
+{
+    class ILibraryAppletProxy : IpcService
+    {
+        private readonly ulong _pid;
+
+        public ILibraryAppletProxy(ulong pid)
+        {
+            _pid = pid;
+        }
+
+        [CommandCmif(0)]
+        // GetCommonStateGetter() -> object<nn::am::service::ICommonStateGetter>
+        public ResultCode GetCommonStateGetter(ServiceCtx context)
+        {
+            MakeObject(context, new ICommonStateGetter(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // GetSelfController() -> object<nn::am::service::ISelfController>
+        public ResultCode GetSelfController(ServiceCtx context)
+        {
+            MakeObject(context, new ISelfController(context, _pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // GetWindowController() -> object<nn::am::service::IWindowController>
+        public ResultCode GetWindowController(ServiceCtx context)
+        {
+            MakeObject(context, new IWindowController(_pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)]
+        // GetAudioController() -> object<nn::am::service::IAudioController>
+        public ResultCode GetAudioController(ServiceCtx context)
+        {
+            MakeObject(context, new IAudioController());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)]
+        // GetDisplayController() -> object<nn::am::service::IDisplayController>
+        public ResultCode GetDisplayController(ServiceCtx context)
+        {
+            MakeObject(context, new IDisplayController(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // GetProcessWindingController() -> object<nn::am::service::IProcessWindingController>
+        public ResultCode GetProcessWindingController(ServiceCtx context)
+        {
+            MakeObject(context, new IProcessWindingController());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // GetLibraryAppletCreator() -> object<nn::am::service::ILibraryAppletCreator>
+        public ResultCode GetLibraryAppletCreator(ServiceCtx context)
+        {
+            MakeObject(context, new ILibraryAppletCreator());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(20)]
+        // OpenLibraryAppletSelfAccessor() -> object<nn::am::service::ILibraryAppletSelfAccessor>
+        public ResultCode OpenLibraryAppletSelfAccessor(ServiceCtx context)
+        {
+            MakeObject(context, new ILibraryAppletSelfAccessor(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(21)]
+        // GetAppletCommonFunctions() -> object<nn::am::service::IAppletCommonFunctions>
+        public ResultCode GetAppletCommonFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IAppletCommonFunctions());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1000)]
+        // GetDebugFunctions() -> object<nn::am::service::IDebugFunctions>
+        public ResultCode GetDebugFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IDebugFunctions());
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/ISystemAppletProxy.cs

@@ -0,0 +1,104 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService
+{
+    class ISystemAppletProxy : IpcService
+    {
+        private readonly ulong _pid;
+
+        public ISystemAppletProxy(ulong pid)
+        {
+            _pid = pid;
+        }
+
+        [CommandCmif(0)]
+        // GetCommonStateGetter() -> object<nn::am::service::ICommonStateGetter>
+        public ResultCode GetCommonStateGetter(ServiceCtx context)
+        {
+            MakeObject(context, new ICommonStateGetter(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // GetSelfController() -> object<nn::am::service::ISelfController>
+        public ResultCode GetSelfController(ServiceCtx context)
+        {
+            MakeObject(context, new ISelfController(context, _pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // GetWindowController() -> object<nn::am::service::IWindowController>
+        public ResultCode GetWindowController(ServiceCtx context)
+        {
+            MakeObject(context, new IWindowController(_pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)]
+        // GetAudioController() -> object<nn::am::service::IAudioController>
+        public ResultCode GetAudioController(ServiceCtx context)
+        {
+            MakeObject(context, new IAudioController());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)]
+        // GetDisplayController() -> object<nn::am::service::IDisplayController>
+        public ResultCode GetDisplayController(ServiceCtx context)
+        {
+            MakeObject(context, new IDisplayController(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // GetLibraryAppletCreator() -> object<nn::am::service::ILibraryAppletCreator>
+        public ResultCode GetLibraryAppletCreator(ServiceCtx context)
+        {
+            MakeObject(context, new ILibraryAppletCreator());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(20)]
+        // GetHomeMenuFunctions() -> object<nn::am::service::IHomeMenuFunctions>
+        public ResultCode GetHomeMenuFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IHomeMenuFunctions(context.Device.System));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(21)]
+        // GetGlobalStateController() -> object<nn::am::service::IGlobalStateController>
+        public ResultCode GetGlobalStateController(ServiceCtx context)
+        {
+            MakeObject(context, new IGlobalStateController());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(22)]
+        // GetApplicationCreator() -> object<nn::am::service::IApplicationCreator>
+        public ResultCode GetApplicationCreator(ServiceCtx context)
+        {
+            MakeObject(context, new IApplicationCreator());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1000)]
+        // GetDebugFunctions() -> object<nn::am::service::IDebugFunctions>
+        public ResultCode GetDebugFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IDebugFunctions());
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletCreator/ILibraryAppletAccessor.cs

@@ -0,0 +1,261 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Applets;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletCreator
+{
+    class ILibraryAppletAccessor : DisposableIpcService
+    {
+        private KernelContext _kernelContext;
+
+        private IApplet _applet;
+
+        private AppletSession _normalSession;
+        private AppletSession _interactiveSession;
+
+        private KEvent _stateChangedEvent;
+        private KEvent _normalOutDataEvent;
+        private KEvent _interactiveOutDataEvent;
+
+        private int _stateChangedEventHandle;
+        private int _normalOutDataEventHandle;
+        private int _interactiveOutDataEventHandle;
+
+        private int _indirectLayerHandle;
+
+        public ILibraryAppletAccessor(AppletId appletId, Horizon system)
+        {
+            _kernelContext = system.KernelContext;
+
+            _stateChangedEvent       = new KEvent(system.KernelContext);
+            _normalOutDataEvent      = new KEvent(system.KernelContext);
+            _interactiveOutDataEvent = new KEvent(system.KernelContext);
+
+            _applet = AppletManager.Create(appletId, system);
+
+            _normalSession      = new AppletSession();
+            _interactiveSession = new AppletSession();
+
+            _applet.AppletStateChanged        += OnAppletStateChanged;
+            _normalSession.DataAvailable      += OnNormalOutData;
+            _interactiveSession.DataAvailable += OnInteractiveOutData;
+
+            Logger.Info?.Print(LogClass.ServiceAm, $"Applet '{appletId}' created.");
+        }
+
+        private void OnAppletStateChanged(object sender, EventArgs e)
+        {
+            _stateChangedEvent.WritableEvent.Signal();
+        }
+
+        private void OnNormalOutData(object sender, EventArgs e)
+        {
+            _normalOutDataEvent.WritableEvent.Signal();
+        }
+
+        private void OnInteractiveOutData(object sender, EventArgs e)
+        {
+            _interactiveOutDataEvent.WritableEvent.Signal();
+        }
+
+        [CommandCmif(0)]
+        // GetAppletStateChangedEvent() -> handle<copy>
+        public ResultCode GetAppletStateChangedEvent(ServiceCtx context)
+        {
+            if (_stateChangedEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_stateChangedEvent.ReadableEvent, out _stateChangedEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_stateChangedEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // Start()
+        public ResultCode Start(ServiceCtx context)
+        {
+            return (ResultCode)_applet.Start(_normalSession.GetConsumer(), _interactiveSession.GetConsumer());
+        }
+
+        [CommandCmif(20)]
+        // RequestExit()
+        public ResultCode RequestExit(ServiceCtx context)
+        {
+            // TODO: Since we don't support software Applet for now, we can just signals the changed state of the applet.
+            _stateChangedEvent.ReadableEvent.Signal();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(30)]
+        // GetResult()
+        public ResultCode GetResult(ServiceCtx context)
+        {
+            return (ResultCode)_applet.GetResult();
+        }
+
+        [CommandCmif(60)]
+        // PresetLibraryAppletGpuTimeSliceZero()
+        public ResultCode PresetLibraryAppletGpuTimeSliceZero(ServiceCtx context)
+        {
+            // NOTE: This call reset two internal fields to 0 and one internal field to "true".
+            //       It seems to be used only with software keyboard inline.
+            //       Since we doesn't support applets for now, it's fine to stub it.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(100)]
+        // PushInData(object<nn::am::service::IStorage>)
+        public ResultCode PushInData(ServiceCtx context)
+        {
+            IStorage data = GetObject<IStorage>(context, 0);
+
+            _normalSession.Push(data.Data);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(101)]
+        // PopOutData() -> object<nn::am::service::IStorage>
+        public ResultCode PopOutData(ServiceCtx context)
+        {
+            if (_normalSession.TryPop(out byte[] data))
+            {
+                MakeObject(context, new IStorage(data));
+
+                _normalOutDataEvent.WritableEvent.Clear();
+
+                return ResultCode.Success;
+            }
+
+            return ResultCode.NotAvailable;
+        }
+
+        [CommandCmif(103)]
+        // PushInteractiveInData(object<nn::am::service::IStorage>)
+        public ResultCode PushInteractiveInData(ServiceCtx context)
+        {
+            IStorage data = GetObject<IStorage>(context, 0);
+
+            _interactiveSession.Push(data.Data);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(104)]
+        // PopInteractiveOutData() -> object<nn::am::service::IStorage>
+        public ResultCode PopInteractiveOutData(ServiceCtx context)
+        {
+            if (_interactiveSession.TryPop(out byte[] data))
+            {
+                MakeObject(context, new IStorage(data));
+
+                _interactiveOutDataEvent.WritableEvent.Clear();
+
+                return ResultCode.Success;
+            }
+
+            return ResultCode.NotAvailable;
+        }
+
+        [CommandCmif(105)]
+        // GetPopOutDataEvent() -> handle<copy>
+        public ResultCode GetPopOutDataEvent(ServiceCtx context)
+        {
+            if (_normalOutDataEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_normalOutDataEvent.ReadableEvent, out _normalOutDataEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_normalOutDataEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(106)]
+        // GetPopInteractiveOutDataEvent() -> handle<copy>
+        public ResultCode GetPopInteractiveOutDataEvent(ServiceCtx context)
+        {
+            if (_interactiveOutDataEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_interactiveOutDataEvent.ReadableEvent, out _interactiveOutDataEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_interactiveOutDataEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(110)]
+        // NeedsToExitProcess()
+        public ResultCode NeedsToExitProcess(ServiceCtx context)
+        {
+            return ResultCode.Stubbed;
+        }
+
+        [CommandCmif(150)]
+        // RequestForAppletToGetForeground()
+        public ResultCode RequestForAppletToGetForeground(ServiceCtx context)
+        {
+            return ResultCode.Stubbed;
+        }
+
+        [CommandCmif(160)] // 2.0.0+
+        // GetIndirectLayerConsumerHandle() -> u64 indirect_layer_consumer_handle
+        public ResultCode GetIndirectLayerConsumerHandle(ServiceCtx context)
+        {
+            Horizon horizon = _kernelContext.Device.System;
+
+            _indirectLayerHandle = horizon.AppletState.IndirectLayerHandles.Add(_applet);
+
+            context.ResponseData.Write((ulong)_indirectLayerHandle);
+
+            return ResultCode.Success;
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            if (isDisposing)
+            {
+                if (_stateChangedEventHandle != 0)
+                {
+                    _kernelContext.Syscall.CloseHandle(_stateChangedEventHandle);
+                }
+
+                if (_normalOutDataEventHandle != 0)
+                {
+                    _kernelContext.Syscall.CloseHandle(_normalOutDataEventHandle);
+                }
+
+                if (_interactiveOutDataEventHandle != 0)
+                {
+                    _kernelContext.Syscall.CloseHandle(_interactiveOutDataEventHandle);
+                }
+            }
+
+            Horizon horizon = _kernelContext.Device.System;
+
+            horizon.AppletState.IndirectLayerHandles.Delete(_indirectLayerHandle);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletProxy/AppletStandalone.cs

@@ -0,0 +1,16 @@
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletProxy
+{
+    class AppletStandalone
+    {
+        public AppletId          AppletId;
+        public LibraryAppletMode LibraryAppletMode;
+        public Queue<byte[]>     InputData;
+
+        public AppletStandalone()
+        {
+            InputData = new Queue<byte[]>();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletProxy/ILibraryAppletSelfAccessor.cs

@@ -0,0 +1,78 @@
+using Ryujinx.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletProxy
+{
+    class ILibraryAppletSelfAccessor : IpcService
+    {
+        private AppletStandalone _appletStandalone = new AppletStandalone();
+
+        public ILibraryAppletSelfAccessor(ServiceCtx context)
+        {
+            if (context.Device.Processes.ActiveApplication.ProgramId == 0x0100000000001009)
+            {
+                // Create MiiEdit data.
+                _appletStandalone = new AppletStandalone()
+                {
+                    AppletId          = AppletId.MiiEdit,
+                    LibraryAppletMode = LibraryAppletMode.AllForeground
+                };
+
+                byte[] miiEditInputData = new byte[0x100];
+                miiEditInputData[0] = 0x03; // Hardcoded unknown value.
+
+                _appletStandalone.InputData.Enqueue(miiEditInputData);
+            }
+            else
+            {
+                throw new NotImplementedException($"{context.Device.Processes.ActiveApplication.ProgramId} applet is not implemented.");
+            }
+        }
+
+        [CommandCmif(0)]
+        // PopInData() -> object<nn::am::service::IStorage>
+        public ResultCode PopInData(ServiceCtx context)
+        {
+            byte[] appletData = _appletStandalone.InputData.Dequeue();
+
+            if (appletData.Length == 0)
+            {
+                return ResultCode.NotAvailable;
+            }
+
+            MakeObject(context, new IStorage(appletData));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // GetLibraryAppletInfo() -> nn::am::service::LibraryAppletInfo
+        public ResultCode GetLibraryAppletInfo(ServiceCtx context)
+        {
+            LibraryAppletInfo libraryAppletInfo = new LibraryAppletInfo()
+            {
+                AppletId          = _appletStandalone.AppletId,
+                LibraryAppletMode = _appletStandalone.LibraryAppletMode
+            };
+
+            context.ResponseData.WriteStruct(libraryAppletInfo);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(14)]
+        // GetCallerAppletIdentityInfo() -> nn::am::service::AppletIdentityInfo
+        public ResultCode GetCallerAppletIdentityInfo(ServiceCtx context)
+        {
+            AppletIdentifyInfo appletIdentifyInfo = new AppletIdentifyInfo()
+            {
+                AppletId = AppletId.QLaunch,
+                TitleId  = 0x0100000000001000
+            };
+
+            context.ResponseData.WriteStruct(appletIdentifyInfo);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/LibraryAppletProxy/IProcessWindingController.cs

@@ -0,0 +1,24 @@
+using Ryujinx.Common;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletProxy
+{
+    class IProcessWindingController : IpcService
+    {
+        public IProcessWindingController() { }
+
+        [CommandCmif(0)]
+        // GetLaunchReason() -> nn::am::service::AppletProcessLaunchReason
+        public ResultCode GetLaunchReason(ServiceCtx context)
+        {
+            // NOTE: Flag is set by using an internal field.
+            AppletProcessLaunchReason appletProcessLaunchReason = new AppletProcessLaunchReason()
+            {
+                Flag = 0
+            };
+
+            context.ResponseData.WriteStruct(appletProcessLaunchReason);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IAppletCommonFunctions.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IAppletCommonFunctions : IpcService
+    {
+        public IAppletCommonFunctions() { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IApplicationCreator.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IApplicationCreator : IpcService
+    {
+        public IApplicationCreator() { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IAudioController.cs

@@ -0,0 +1,66 @@
+using Ryujinx.Common.Logging;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IAudioController : IpcService
+    {
+        public IAudioController() { }
+
+        [CommandCmif(0)]
+        // SetExpectedMasterVolume(f32, f32)
+        public ResultCode SetExpectedMasterVolume(ServiceCtx context)
+        {
+            float appletVolume        = context.RequestData.ReadSingle();
+            float libraryAppletVolume = context.RequestData.ReadSingle();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // GetMainAppletExpectedMasterVolume() -> f32
+        public ResultCode GetMainAppletExpectedMasterVolume(ServiceCtx context)
+        {
+            context.ResponseData.Write(1f);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // GetLibraryAppletExpectedMasterVolume() -> f32
+        public ResultCode GetLibraryAppletExpectedMasterVolume(ServiceCtx context)
+        {
+            context.ResponseData.Write(1f);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)]
+        // ChangeMainAppletMasterVolume(f32, u64)
+        public ResultCode ChangeMainAppletMasterVolume(ServiceCtx context)
+        {
+            float unknown0 = context.RequestData.ReadSingle();
+            long  unknown1 = context.RequestData.ReadInt64();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)]
+        // SetTransparentVolumeRate(f32)
+        public ResultCode SetTransparentVolumeRate(ServiceCtx context)
+        {
+            float unknown0 = context.RequestData.ReadSingle();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/ICommonStateGetter.cs

@@ -0,0 +1,285 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Settings.Types;
+using Ryujinx.HLE.HOS.Services.Vi.RootService.ApplicationDisplayService;
+using Ryujinx.HLE.HOS.SystemState;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class ICommonStateGetter : IpcService
+    {
+        private Apm.ManagerServer       _apmManagerServer;
+        private Apm.SystemManagerServer _apmSystemManagerServer;
+        private Lbl.LblControllerServer _lblControllerServer;
+
+        private bool _vrModeEnabled;
+#pragma warning disable CS0414
+        private bool _lcdBacklighOffEnabled;
+        private bool _requestExitToLibraryAppletAtExecuteNextProgramEnabled;
+#pragma warning restore CS0414
+        private int  _messageEventHandle;
+        private int  _displayResolutionChangedEventHandle;
+
+        public ICommonStateGetter(ServiceCtx context)
+        {
+            _apmManagerServer       = new Apm.ManagerServer(context);
+            _apmSystemManagerServer = new Apm.SystemManagerServer(context);
+            _lblControllerServer    = new Lbl.LblControllerServer(context);
+        }
+
+        [CommandCmif(0)]
+        // GetEventHandle() -> handle<copy>
+        public ResultCode GetEventHandle(ServiceCtx context)
+        {
+            KEvent messageEvent = context.Device.System.AppletState.MessageEvent;
+
+            if (_messageEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(messageEvent.ReadableEvent, out _messageEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_messageEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // ReceiveMessage() -> nn::am::AppletMessage
+        public ResultCode ReceiveMessage(ServiceCtx context)
+        {
+            if (!context.Device.System.AppletState.Messages.TryDequeue(out AppletMessage message))
+            {
+                return ResultCode.NoMessages;
+            }
+
+            KEvent messageEvent = context.Device.System.AppletState.MessageEvent;
+
+            // NOTE: Service checks if current states are different than the stored ones.
+            //       Since we don't support any states for now, it's fine to check if there is still messages available.
+
+            if (context.Device.System.AppletState.Messages.IsEmpty)
+            {
+                messageEvent.ReadableEvent.Clear();
+            }
+            else
+            {
+                messageEvent.ReadableEvent.Signal();
+            }
+
+            context.ResponseData.Write((int)message);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(5)]
+        // GetOperationMode() -> u8
+        public ResultCode GetOperationMode(ServiceCtx context)
+        {
+            OperationMode mode = context.Device.System.State.DockedMode
+                ? OperationMode.Docked
+                : OperationMode.Handheld;
+
+            context.ResponseData.Write((byte)mode);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(6)]
+        // GetPerformanceMode() -> nn::apm::PerformanceMode
+        public ResultCode GetPerformanceMode(ServiceCtx context)
+        {
+            return (ResultCode)_apmManagerServer.GetPerformanceMode(context);
+        }
+
+        [CommandCmif(8)]
+        // GetBootMode() -> u8
+        public ResultCode GetBootMode(ServiceCtx context)
+        {
+            context.ResponseData.Write((byte)0); //Unknown value.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(9)]
+        // GetCurrentFocusState() -> u8
+        public ResultCode GetCurrentFocusState(ServiceCtx context)
+        {
+            context.ResponseData.Write((byte)context.Device.System.AppletState.FocusState);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(50)] // 3.0.0+
+        // IsVrModeEnabled() -> b8
+        public ResultCode IsVrModeEnabled(ServiceCtx context)
+        {
+            context.ResponseData.Write(_vrModeEnabled);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(51)] // 3.0.0+
+        // SetVrModeEnabled(b8)
+        public ResultCode SetVrModeEnabled(ServiceCtx context)
+        {
+            bool vrModeEnabled = context.RequestData.ReadBoolean();
+
+            UpdateVrMode(vrModeEnabled);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(52)] // 4.0.0+
+        // SetLcdBacklighOffEnabled(b8)
+        public ResultCode SetLcdBacklighOffEnabled(ServiceCtx context)
+        {
+            // NOTE: Service sets a private field here, maybe this field is used somewhere else to turned off the backlight.
+            //       Since we don't support backlight, it's fine to do nothing.
+
+            _lcdBacklighOffEnabled = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(53)] // 7.0.0+
+        // BeginVrModeEx()
+        public ResultCode BeginVrModeEx(ServiceCtx context)
+        {
+            UpdateVrMode(true);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(54)] // 7.0.0+
+        // EndVrModeEx()
+        public ResultCode EndVrModeEx(ServiceCtx context)
+        {
+            UpdateVrMode(false);
+
+            return ResultCode.Success;
+        }
+
+        private void UpdateVrMode(bool vrModeEnabled)
+        {
+            if (_vrModeEnabled == vrModeEnabled)
+            {
+                return;
+            }
+
+            _vrModeEnabled = vrModeEnabled;
+
+            if (vrModeEnabled)
+            {
+                _lblControllerServer.EnableVrMode();
+            }
+            else
+            {
+                _lblControllerServer.DisableVrMode();
+            }
+
+            // TODO: It signals an internal event of ICommonStateGetter. We have to determine where this event is used.
+        }
+
+        [CommandCmif(60)] // 3.0.0+
+        // GetDefaultDisplayResolution() -> (u32, u32)
+        public ResultCode GetDefaultDisplayResolution(ServiceCtx context)
+        {
+            // NOTE: Original service calls IOperationModeManager::GetDefaultDisplayResolution of omm service.
+            //       IOperationModeManager::GetDefaultDisplayResolution of omm service call IManagerDisplayService::GetDisplayResolution of vi service.
+            (ulong width, ulong height) = AndroidSurfaceComposerClient.GetDisplayInfo(context);
+
+            context.ResponseData.Write((uint)width);
+            context.ResponseData.Write((uint)height);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(61)] // 3.0.0+
+        // GetDefaultDisplayResolutionChangeEvent() -> handle<copy>
+        public ResultCode GetDefaultDisplayResolutionChangeEvent(ServiceCtx context)
+        {
+            // NOTE: Original service calls IOperationModeManager::GetDefaultDisplayResolutionChangeEvent of omm service.
+            if (_displayResolutionChangedEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(context.Device.System.DisplayResolutionChangeEvent.ReadableEvent, out _displayResolutionChangedEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_displayResolutionChangedEventHandle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(62)] // 4.0.0+
+        // GetHdcpAuthenticationState() -> s32 state
+        public ResultCode GetHdcpAuthenticationState(ServiceCtx context)
+        {
+            context.ResponseData.Write(0);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(66)] // 6.0.0+
+        // SetCpuBoostMode(u32 cpu_boost_mode)
+        public ResultCode SetCpuBoostMode(ServiceCtx context)
+        {
+            uint cpuBoostMode = context.RequestData.ReadUInt32();
+
+            if (cpuBoostMode > 1)
+            {
+                return ResultCode.InvalidParameters;
+            }
+
+            _apmSystemManagerServer.SetCpuBoostMode((Apm.CpuBoostMode)cpuBoostMode);
+
+            // TODO: It signals an internal event of ICommonStateGetter. We have to determine where this event is used.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(91)] // 7.0.0+
+        // GetCurrentPerformanceConfiguration() -> nn::apm::PerformanceConfiguration
+        public ResultCode GetCurrentPerformanceConfiguration(ServiceCtx context)
+        {
+            return (ResultCode)_apmSystemManagerServer.GetCurrentPerformanceConfiguration(context);
+        }
+
+        [CommandCmif(300)] // 9.0.0+
+        // GetSettingsPlatformRegion() -> u8
+        public ResultCode GetSettingsPlatformRegion(ServiceCtx context)
+        {
+            PlatformRegion platformRegion = context.Device.System.State.DesiredRegionCode == (uint)RegionCode.China ? PlatformRegion.China : PlatformRegion.Global;
+
+            // FIXME: Call set:sys GetPlatformRegion
+            context.ResponseData.Write((byte)platformRegion);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(900)] // 11.0.0+
+        // SetRequestExitToLibraryAppletAtExecuteNextProgramEnabled()
+        public ResultCode SetRequestExitToLibraryAppletAtExecuteNextProgramEnabled(ServiceCtx context)
+        {
+            // TODO : Find where the field is used.
+            _requestExitToLibraryAppletAtExecuteNextProgramEnabled = true;
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IDebugFunctions.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IDebugFunctions : IpcService
+    {
+        public IDebugFunctions() { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IDisplayController.cs

@@ -0,0 +1,106 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Memory;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IDisplayController : IpcService
+    {
+        private KTransferMemory _transferMem;
+        private bool            _lastApplicationCaptureBufferAcquired;
+        private bool            _callerAppletCaptureBufferAcquired;
+
+        public IDisplayController(ServiceCtx context)
+        {
+            _transferMem = context.Device.System.AppletCaptureBufferTransfer;
+        }
+
+        [CommandCmif(8)] // 2.0.0+
+        // TakeScreenShotOfOwnLayer(b8, s32)
+        public ResultCode TakeScreenShotOfOwnLayer(ServiceCtx context)
+        {
+            bool unknown1 = context.RequestData.ReadBoolean();
+            int  unknown2 = context.RequestData.ReadInt32();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { unknown1, unknown2 });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // ReleaseLastApplicationCaptureBuffer()
+        public ResultCode ReleaseLastApplicationCaptureBuffer(ServiceCtx context)
+        {
+            if (!_lastApplicationCaptureBufferAcquired)
+            {
+                return ResultCode.BufferNotAcquired;
+            }
+
+            _lastApplicationCaptureBufferAcquired = false;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(15)]
+        // ReleaseCallerAppletCaptureBuffer()
+        public ResultCode ReleaseCallerAppletCaptureBuffer(ServiceCtx context)
+        {
+            if (!_callerAppletCaptureBufferAcquired)
+            {
+                return ResultCode.BufferNotAcquired;
+            }
+
+            _callerAppletCaptureBufferAcquired = false;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(16)]
+        // AcquireLastApplicationCaptureBufferEx() -> (b8, handle<copy>)
+        public ResultCode AcquireLastApplicationCaptureBufferEx(ServiceCtx context)
+        {
+            if (_lastApplicationCaptureBufferAcquired)
+            {
+                return ResultCode.BufferAlreadyAcquired;
+            }
+
+            if (context.Process.HandleTable.GenerateHandle(_transferMem, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            _lastApplicationCaptureBufferAcquired = true;
+
+            context.ResponseData.Write(_lastApplicationCaptureBufferAcquired);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(18)]
+        // AcquireCallerAppletCaptureBufferEx() -> (b8, handle<copy>)
+        public ResultCode AcquireCallerAppletCaptureBufferEx(ServiceCtx context)
+        {
+            if (_callerAppletCaptureBufferAcquired)
+            {
+                return ResultCode.BufferAlreadyAcquired;
+            }
+
+            if (context.Process.HandleTable.GenerateHandle(_transferMem, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            _callerAppletCaptureBufferAcquired = true;
+
+            context.ResponseData.Write(_callerAppletCaptureBufferAcquired);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IGlobalStateController.cs

@@ -0,0 +1,7 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IGlobalStateController : IpcService
+    {
+        public IGlobalStateController() { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IHomeMenuFunctions.cs

@@ -0,0 +1,48 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IHomeMenuFunctions : IpcService
+    {
+        private KEvent _channelEvent;
+        private int    _channelEventHandle;
+
+        public IHomeMenuFunctions(Horizon system)
+        {
+            // TODO: Signal this Event somewhere in future.
+            _channelEvent = new KEvent(system.KernelContext);
+        }
+
+        [CommandCmif(10)]
+        // RequestToGetForeground()
+        public ResultCode RequestToGetForeground(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(21)]
+        // GetPopFromGeneralChannelEvent() -> handle<copy>
+        public ResultCode GetPopFromGeneralChannelEvent(ServiceCtx context)
+        {
+            if (_channelEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_channelEvent.ReadableEvent, out _channelEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_channelEventHandle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/ILibraryAppletCreator.cs

@@ -0,0 +1,91 @@
+using Ryujinx.HLE.HOS.Kernel.Memory;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.LibraryAppletCreator;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class ILibraryAppletCreator : IpcService
+    {
+        public ILibraryAppletCreator() { }
+
+        [CommandCmif(0)]
+        // CreateLibraryApplet(u32, u32) -> object<nn::am::service::ILibraryAppletAccessor>
+        public ResultCode CreateLibraryApplet(ServiceCtx context)
+        {
+            AppletId appletId          = (AppletId)context.RequestData.ReadInt32();
+            int      libraryAppletMode = context.RequestData.ReadInt32();
+
+            MakeObject(context, new ILibraryAppletAccessor(appletId, context.Device.System));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // CreateStorage(u64) -> object<nn::am::service::IStorage>
+        public ResultCode CreateStorage(ServiceCtx context)
+        {
+            long size = context.RequestData.ReadInt64();
+
+            if (size <= 0)
+            {
+                return ResultCode.ObjectInvalid;
+            }
+
+            MakeObject(context, new IStorage(new byte[size]));
+
+            // NOTE: Returns ResultCode.MemoryAllocationFailed if IStorage is null, it doesn't occur in our case.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // CreateTransferMemoryStorage(b8, u64, handle<copy>) -> object<nn::am::service::IStorage>
+        public ResultCode CreateTransferMemoryStorage(ServiceCtx context)
+        {
+            bool isReadOnly = (context.RequestData.ReadInt64() & 1) == 0;
+            long size       = context.RequestData.ReadInt64();
+            int  handle     = context.Request.HandleDesc.ToCopy[0];
+
+            KTransferMemory transferMem = context.Process.HandleTable.GetObject<KTransferMemory>(handle);
+
+            if (size <= 0)
+            {
+                return ResultCode.ObjectInvalid;
+            }
+
+            byte[] data = new byte[transferMem.Size];
+
+            transferMem.Creator.CpuMemory.Read(transferMem.Address, data);
+
+            context.Device.System.KernelContext.Syscall.CloseHandle(handle);
+
+            MakeObject(context, new IStorage(data, isReadOnly));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)] // 2.0.0+
+        // CreateHandleStorage(u64, handle<copy>) -> object<nn::am::service::IStorage>
+        public ResultCode CreateHandleStorage(ServiceCtx context)
+        {
+            long size   = context.RequestData.ReadInt64();
+            int  handle = context.Request.HandleDesc.ToCopy[0];
+
+            KTransferMemory transferMem = context.Process.HandleTable.GetObject<KTransferMemory>(handle);
+
+            if (size <= 0)
+            {
+                return ResultCode.ObjectInvalid;
+            }
+
+            byte[] data = new byte[transferMem.Size];
+
+            transferMem.Creator.CpuMemory.Read(transferMem.Address, data);
+
+            context.Device.System.KernelContext.Syscall.CloseHandle(handle);
+
+            MakeObject(context, new IStorage(data));
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/ISelfController.cs

@@ -0,0 +1,432 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy.Types;
+using Ryujinx.Horizon.Common;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class ISelfController : IpcService
+    {
+        private readonly ulong _pid;
+
+        private KEvent _libraryAppletLaunchableEvent;
+        private int    _libraryAppletLaunchableEventHandle;
+
+        private KEvent _accumulatedSuspendedTickChangedEvent;
+        private int    _accumulatedSuspendedTickChangedEventHandle;
+
+        private object _fatalSectionLock = new object();
+        private int    _fatalSectionCount;
+
+        // TODO: Set this when the game goes in suspension (go back to home menu ect), we currently don't support that so we can keep it set to 0.
+        private ulong _accumulatedSuspendedTickValue = 0;
+
+        // TODO: Determine where those fields are used.
+        private bool _screenShotPermission               = false;
+        private bool _operationModeChangedNotification   = false;
+        private bool _performanceModeChangedNotification = false;
+        private bool _restartMessageEnabled              = false;
+        private bool _outOfFocusSuspendingEnabled        = false;
+        private bool _handlesRequestToDisplay            = false;
+        private bool _autoSleepDisabled                  = false;
+        private bool _albumImageTakenNotificationEnabled = false;
+        private bool _recordVolumeMuted = false;
+
+        private uint _screenShotImageOrientation = 0;
+        private uint _idleTimeDetectionExtension = 0;
+
+        public ISelfController(ServiceCtx context, ulong pid)
+        {
+            _libraryAppletLaunchableEvent = new KEvent(context.Device.System.KernelContext);
+            _pid = pid;
+        }
+
+        [CommandCmif(0)]
+        // Exit()
+        public ResultCode Exit(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // LockExit()
+        public ResultCode LockExit(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // UnlockExit()
+        public ResultCode UnlockExit(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)] // 2.0.0+
+        // EnterFatalSection()
+        public ResultCode EnterFatalSection(ServiceCtx context)
+        {
+            lock (_fatalSectionLock)
+            {
+                _fatalSectionCount++;
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)] // 2.0.0+
+        // LeaveFatalSection()
+        public ResultCode LeaveFatalSection(ServiceCtx context)
+        {
+            ResultCode result = ResultCode.Success;
+
+            lock (_fatalSectionLock)
+            {
+                if (_fatalSectionCount != 0)
+                {
+                    _fatalSectionCount--;
+                }
+                else
+                {
+                    result = ResultCode.UnbalancedFatalSection;
+                }
+            }
+
+            return result;
+        }
+
+        [CommandCmif(9)]
+        // GetLibraryAppletLaunchableEvent() -> handle<copy>
+        public ResultCode GetLibraryAppletLaunchableEvent(ServiceCtx context)
+        {
+            _libraryAppletLaunchableEvent.ReadableEvent.Signal();
+
+            if (_libraryAppletLaunchableEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_libraryAppletLaunchableEvent.ReadableEvent, out _libraryAppletLaunchableEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_libraryAppletLaunchableEventHandle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // SetScreenShotPermission(u32)
+        public ResultCode SetScreenShotPermission(ServiceCtx context)
+        {
+            bool screenShotPermission = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { screenShotPermission });
+
+            _screenShotPermission = screenShotPermission;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // SetOperationModeChangedNotification(b8)
+        public ResultCode SetOperationModeChangedNotification(ServiceCtx context)
+        {
+            bool operationModeChangedNotification = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { operationModeChangedNotification });
+
+            _operationModeChangedNotification = operationModeChangedNotification;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)]
+        // SetPerformanceModeChangedNotification(b8)
+        public ResultCode SetPerformanceModeChangedNotification(ServiceCtx context)
+        {
+            bool performanceModeChangedNotification = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { performanceModeChangedNotification });
+
+            _performanceModeChangedNotification = performanceModeChangedNotification;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(13)]
+        // SetFocusHandlingMode(b8, b8, b8)
+        public ResultCode SetFocusHandlingMode(ServiceCtx context)
+        {
+            bool unknownFlag1 = context.RequestData.ReadBoolean();
+            bool unknownFlag2 = context.RequestData.ReadBoolean();
+            bool unknownFlag3 = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { unknownFlag1, unknownFlag2, unknownFlag3 });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(14)]
+        // SetRestartMessageEnabled(b8)
+        public ResultCode SetRestartMessageEnabled(ServiceCtx context)
+        {
+            bool restartMessageEnabled = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { restartMessageEnabled });
+
+            _restartMessageEnabled = restartMessageEnabled;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(16)] // 2.0.0+
+        // SetOutOfFocusSuspendingEnabled(b8)
+        public ResultCode SetOutOfFocusSuspendingEnabled(ServiceCtx context)
+        {
+            bool outOfFocusSuspendingEnabled = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { outOfFocusSuspendingEnabled });
+
+            _outOfFocusSuspendingEnabled = outOfFocusSuspendingEnabled;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(19)] // 3.0.0+
+        // SetScreenShotImageOrientation(u32)
+        public ResultCode SetScreenShotImageOrientation(ServiceCtx context)
+        {
+            uint screenShotImageOrientation = context.RequestData.ReadUInt32();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { screenShotImageOrientation });
+
+            _screenShotImageOrientation = screenShotImageOrientation;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(40)]
+        // CreateManagedDisplayLayer() -> u64
+        public ResultCode CreateManagedDisplayLayer(ServiceCtx context)
+        {
+            context.Device.System.SurfaceFlinger.CreateLayer(out long layerId, _pid);
+            context.Device.System.SurfaceFlinger.SetRenderLayer(layerId);
+
+            context.ResponseData.Write(layerId);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(41)] // 4.0.0+
+        // IsSystemBufferSharingEnabled()
+        public ResultCode IsSystemBufferSharingEnabled(ServiceCtx context)
+        {
+            // NOTE: Service checks a private field and return an error if the SystemBufferSharing is disabled.
+
+            return ResultCode.NotImplemented;
+        }
+
+        [CommandCmif(44)] // 10.0.0+
+        // CreateManagedDisplaySeparableLayer() -> (u64, u64)
+        public ResultCode CreateManagedDisplaySeparableLayer(ServiceCtx context)
+        {
+            context.Device.System.SurfaceFlinger.CreateLayer(out long displayLayerId, _pid);
+            context.Device.System.SurfaceFlinger.CreateLayer(out long recordingLayerId, _pid);
+            context.Device.System.SurfaceFlinger.SetRenderLayer(displayLayerId);
+
+            context.ResponseData.Write(displayLayerId);
+            context.ResponseData.Write(recordingLayerId);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(50)]
+        // SetHandlesRequestToDisplay(b8)
+        public ResultCode SetHandlesRequestToDisplay(ServiceCtx context)
+        {
+            bool handlesRequestToDisplay = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { handlesRequestToDisplay });
+
+            _handlesRequestToDisplay = handlesRequestToDisplay;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(62)]
+        // SetIdleTimeDetectionExtension(u32)
+        public ResultCode SetIdleTimeDetectionExtension(ServiceCtx context)
+        {
+            uint idleTimeDetectionExtension = context.RequestData.ReadUInt32();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { idleTimeDetectionExtension });
+
+            _idleTimeDetectionExtension = idleTimeDetectionExtension;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(63)]
+        // GetIdleTimeDetectionExtension() -> u32
+        public ResultCode GetIdleTimeDetectionExtension(ServiceCtx context)
+        {
+            context.ResponseData.Write(_idleTimeDetectionExtension);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { _idleTimeDetectionExtension });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(65)]
+        // ReportUserIsActive()
+        public ResultCode ReportUserIsActive(ServiceCtx context)
+        {
+            // TODO: Call idle:sys ReportUserIsActive when implemented.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(67)] //3.0.0+
+        // IsIlluminanceAvailable() -> bool
+        public ResultCode IsIlluminanceAvailable(ServiceCtx context)
+        {
+            // NOTE: This should call IsAmbientLightSensorAvailable through to Lbl, but there's no situation where we'd want false.
+            context.ResponseData.Write(true);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(68)]
+        // SetAutoSleepDisabled(u8)
+        public ResultCode SetAutoSleepDisabled(ServiceCtx context)
+        {
+            bool autoSleepDisabled = context.RequestData.ReadBoolean();
+
+            _autoSleepDisabled = autoSleepDisabled;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(69)]
+        // IsAutoSleepDisabled() -> u8
+        public ResultCode IsAutoSleepDisabled(ServiceCtx context)
+        {
+            context.ResponseData.Write(_autoSleepDisabled);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(71)] //5.0.0+
+        // GetCurrentIlluminanceEx() -> (bool, f32)
+        public ResultCode GetCurrentIlluminanceEx(ServiceCtx context)
+        {
+            // TODO: The light value should be configurable - presumably users using software that takes advantage will want control.
+            context.ResponseData.Write(1); // OverLimit
+            context.ResponseData.Write(10000f); // Lux - 10K lux is ambient light.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(80)] // 4.0.0+
+        // SetWirelessPriorityMode(s32 wireless_priority_mode)
+        public ResultCode SetWirelessPriorityMode(ServiceCtx context)
+        {
+            WirelessPriorityMode wirelessPriorityMode = (WirelessPriorityMode)context.RequestData.ReadInt32();
+
+            if (wirelessPriorityMode > WirelessPriorityMode.Unknown2)
+            {
+                return ResultCode.InvalidParameters;
+            }
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { wirelessPriorityMode });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(90)] // 6.0.0+
+        // GetAccumulatedSuspendedTickValue() -> u64
+        public ResultCode GetAccumulatedSuspendedTickValue(ServiceCtx context)
+        {
+            context.ResponseData.Write(_accumulatedSuspendedTickValue);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(91)] // 6.0.0+
+        // GetAccumulatedSuspendedTickChangedEvent() -> handle<copy>
+        public ResultCode GetAccumulatedSuspendedTickChangedEvent(ServiceCtx context)
+        {
+            if (_accumulatedSuspendedTickChangedEventHandle == 0)
+            {
+                _accumulatedSuspendedTickChangedEvent = new KEvent(context.Device.System.KernelContext);
+
+                _accumulatedSuspendedTickChangedEvent.ReadableEvent.Signal();
+
+                if (context.Process.HandleTable.GenerateHandle(_accumulatedSuspendedTickChangedEvent.ReadableEvent, out _accumulatedSuspendedTickChangedEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_accumulatedSuspendedTickChangedEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(100)] // 7.0.0+
+        // SetAlbumImageTakenNotificationEnabled(u8)
+        public ResultCode SetAlbumImageTakenNotificationEnabled(ServiceCtx context)
+        {
+            bool albumImageTakenNotificationEnabled = context.RequestData.ReadBoolean();
+
+            _albumImageTakenNotificationEnabled = albumImageTakenNotificationEnabled;
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(120)] // 11.0.0+
+        // SaveCurrentScreenshot(s32 album_report_option)
+        public ResultCode SaveCurrentScreenshot(ServiceCtx context)
+        {
+            AlbumReportOption albumReportOption = (AlbumReportOption)context.RequestData.ReadInt32();
+
+            if (albumReportOption > AlbumReportOption.Unknown3)
+            {
+                return ResultCode.InvalidParameters;
+            }
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { albumReportOption });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(130)] // 13.0.0+
+        // SetRecordVolumeMuted(b8)
+        public ResultCode SetRecordVolumeMuted(ServiceCtx context)
+        {
+            bool recordVolumeMuted = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { recordVolumeMuted });
+
+            _recordVolumeMuted = recordVolumeMuted;
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/IWindowController.cs

@@ -0,0 +1,36 @@
+using Ryujinx.Common.Logging;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    class IWindowController : IpcService
+    {
+        private readonly ulong _pid;
+
+        public IWindowController(ulong pid)
+        {
+            _pid = pid;
+        }
+
+        [CommandCmif(1)]
+        // GetAppletResourceUserId() -> nn::applet::AppletResourceUserId
+        public ResultCode GetAppletResourceUserId(ServiceCtx context)
+        {
+            long appletResourceUserId = context.Device.System.AppletState.AppletResourceUserIds.Add(_pid);
+
+            context.ResponseData.Write(appletResourceUserId);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { appletResourceUserId });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // AcquireForegroundRights()
+        public ResultCode AcquireForegroundRights(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/Types/AlbumReportOption.cs

@@ -0,0 +1,10 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy.Types
+{
+    enum AlbumReportOption
+    {
+        OverlayNotDisplayed,
+        OverlayDisplayed,
+        Unknown2,
+        Unknown3
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/Types/AppletMessage.cs

@@ -0,0 +1,36 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    enum AppletMessage
+    {
+        None                             = 0,
+        ChangeIntoForeground             = 1,
+        ChangeIntoBackground             = 2,
+        Exit                             = 4,
+        ApplicationExited                = 6,
+        FocusStateChanged                = 15,
+        Resume                           = 16,
+        DetectShortPressingHomeButton    = 20,
+        DetectLongPressingHomeButton     = 21,
+        DetectShortPressingPowerButton   = 22,
+        DetectMiddlePressingPowerButton  = 23,
+        DetectLongPressingPowerButton    = 24,
+        RequestToPrepareSleep            = 25,
+        FinishedSleepSequence            = 26,
+        SleepRequiredByHighTemperature   = 27,
+        SleepRequiredByLowBattery        = 28,
+        AutoPowerDown                    = 29,
+        OperationModeChanged             = 30,
+        PerformanceModeChanged           = 31,
+        DetectReceivingCecSystemStandby  = 32,
+        SdCardRemoved                    = 33,
+        LaunchApplicationRequested       = 50,
+        RequestToDisplay                 = 51,
+        ShowApplicationLogo              = 55,
+        HideApplicationLogo              = 56,
+        ForceHideApplicationLogo         = 57,
+        FloatingApplicationDetected      = 60,
+        DetectShortPressingCaptureButton = 90,
+        AlbumScreenShotTaken             = 92,
+        AlbumRecordingSaved              = 93
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/Types/FocusState.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    enum FocusState
+    {
+        InFocus    = 1,
+        OutOfFocus = 2
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/Types/OperationMode.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy
+{
+    enum OperationMode
+    {
+        Handheld = 0,
+        Docked   = 1
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AllSystemAppletProxiesService/SystemAppletProxy/Types/WirelessPriorityMode.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy.Types
+{
+    enum WirelessPriorityMode
+    {
+        Default,
+        OptimizedForWlan,
+        Unknown2
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AppletFifo.cs

@@ -0,0 +1,120 @@
+using System;
+using System.Collections;
+using System.Collections.Concurrent;
+using System.Collections.Generic;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    internal class AppletFifo<T> : IAppletFifo<T>
+    {
+        private ConcurrentQueue<T> _dataQueue;
+
+        public event EventHandler DataAvailable;
+
+        public bool IsSynchronized
+        {
+            get { return ((ICollection)_dataQueue).IsSynchronized; }
+        }
+
+        public object SyncRoot
+        {
+            get { return ((ICollection)_dataQueue).SyncRoot; }
+        }
+
+        public int Count
+        {
+            get { return _dataQueue.Count; }
+        }
+
+        public AppletFifo()
+        {
+            _dataQueue = new ConcurrentQueue<T>();
+        }
+
+        public void Push(T item)
+        {
+            _dataQueue.Enqueue(item);
+
+            DataAvailable?.Invoke(this, null);
+        }
+
+        public bool TryAdd(T item)
+        {
+            try
+            {
+                this.Push(item);
+
+                return true;
+            }
+            catch
+            {
+                return false;
+            }
+        }
+
+        public T Pop()
+        {
+            if (_dataQueue.TryDequeue(out T result))
+            {
+                return result;
+            }
+
+            throw new InvalidOperationException("FIFO empty.");
+        }
+
+        public bool TryPop(out T result)
+        {
+            return _dataQueue.TryDequeue(out result);
+        }
+
+        public bool TryTake(out T item)
+        {
+            return this.TryPop(out item);
+        }
+
+        public T Peek()
+        {
+            if (_dataQueue.TryPeek(out T result))
+            {
+                return result;
+            }
+
+            throw new InvalidOperationException("FIFO empty.");
+        }
+
+        public bool TryPeek(out T result)
+        {
+            return _dataQueue.TryPeek(out result);
+        }
+
+        public void Clear()
+        {
+            _dataQueue.Clear();
+        }
+
+        public T[] ToArray()
+        {
+            return _dataQueue.ToArray();
+        }
+
+        public void CopyTo(T[] array, int arrayIndex)
+        {
+            _dataQueue.CopyTo(array, arrayIndex);
+        }
+
+        public void CopyTo(Array array, int index)
+        {
+            this.CopyTo((T[])array, index);
+        }
+
+        public IEnumerator<T> GetEnumerator()
+        {
+            return _dataQueue.GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return _dataQueue.GetEnumerator();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/AppletSession.cs

@@ -0,0 +1,77 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    internal class AppletSession
+    {
+        private IAppletFifo<byte[]> _inputData;
+        private IAppletFifo<byte[]> _outputData;
+
+        public event EventHandler DataAvailable;
+
+        public int Length
+        {
+            get { return _inputData.Count; }
+        }
+
+        public AppletSession()
+            : this(new AppletFifo<byte[]>(),
+                   new AppletFifo<byte[]>())
+        { }
+
+        public AppletSession(
+            IAppletFifo<byte[]> inputData,
+            IAppletFifo<byte[]> outputData)
+        {
+            _inputData  = inputData;
+            _outputData = outputData;
+
+            _inputData.DataAvailable += OnDataAvailable;
+        }
+
+        private void OnDataAvailable(object sender, EventArgs e)
+        {
+            DataAvailable?.Invoke(this, null);
+        }
+
+        public void Push(byte[] item)
+        {
+            if (!this.TryPush(item))
+            {
+                // TODO(jduncanator): Throw a proper exception
+                throw new InvalidOperationException();
+            }
+        }
+
+        public bool TryPush(byte[] item)
+        {
+            return _outputData.TryAdd(item);
+        }
+
+        public byte[] Pop()
+        {
+            if (this.TryPop(out byte[] item))
+            {
+                return item;
+            }
+
+            throw new InvalidOperationException("Input data empty.");
+        }
+
+        public bool TryPop(out byte[] item)
+        {
+            return _inputData.TryTake(out item);
+        }
+
+        /// <summary>
+        /// This returns an AppletSession that can be used at the
+        /// other end of the pipe. Pushing data into this new session
+        /// will put it in the first session's input buffer, and vice
+        /// versa.
+        /// </summary>
+        public AppletSession GetConsumer()
+        {
+            return new AppletSession(this._outputData, this._inputData);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/IAllSystemAppletProxiesService.cs

@@ -0,0 +1,29 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    [Service("appletAE")]
+    class IAllSystemAppletProxiesService : IpcService
+    {
+        public IAllSystemAppletProxiesService(ServiceCtx context) { }
+
+        [CommandCmif(100)]
+        // OpenSystemAppletProxy(u64, pid, handle<copy>) -> object<nn::am::service::ISystemAppletProxy>
+        public ResultCode OpenSystemAppletProxy(ServiceCtx context)
+        {
+            MakeObject(context, new ISystemAppletProxy(context.Request.HandleDesc.PId));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(200)]
+        [CommandCmif(201)] // 3.0.0+
+        // OpenLibraryAppletProxy(u64, pid, handle<copy>) -> object<nn::am::service::ILibraryAppletProxy>
+        public ResultCode OpenLibraryAppletProxy(ServiceCtx context)
+        {
+            MakeObject(context, new ILibraryAppletProxy(context.Request.HandleDesc.PId));
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/IAppletFifo.cs

@@ -0,0 +1,10 @@
+using System;
+using System.Collections.Concurrent;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    interface IAppletFifo<T> : IProducerConsumerCollection<T>
+    {
+        event EventHandler DataAvailable;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/IStorage.cs

@@ -0,0 +1,23 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    class IStorage : IpcService
+    {
+        public bool   IsReadOnly { get; private set; }
+        public byte[] Data       { get; private set; }
+
+        public IStorage(byte[] data, bool isReadOnly = false)
+        {
+            IsReadOnly = isReadOnly;
+            Data       = data;
+        }
+
+        [CommandCmif(0)]
+        // Open() -> object<nn::am::service::IStorageAccessor>
+        public ResultCode Open(ServiceCtx context)
+        {
+            MakeObject(context, new IStorageAccessor(this));
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/IStorageAccessor.cs

@@ -0,0 +1,86 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    class IStorageAccessor : IpcService
+    {
+        private IStorage _storage;
+
+        public IStorageAccessor(IStorage storage)
+        {
+            _storage = storage;
+        }
+
+        [CommandCmif(0)]
+        // GetSize() -> u64
+        public ResultCode GetSize(ServiceCtx context)
+        {
+            context.ResponseData.Write((long)_storage.Data.Length);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)]
+        // Write(u64, buffer<bytes, 0x21>)
+        public ResultCode Write(ServiceCtx context)
+        {
+            if (_storage.IsReadOnly)
+            {
+                return ResultCode.ObjectInvalid;
+            }
+
+            ulong writePosition = context.RequestData.ReadUInt64();
+
+            if (writePosition > (ulong)_storage.Data.Length)
+            {
+                return ResultCode.OutOfBounds;
+            }
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x21();
+
+            size = Math.Min(size, (ulong)_storage.Data.Length - writePosition);
+
+            if (size > 0)
+            {
+                ulong maxSize = (ulong)_storage.Data.Length - writePosition;
+
+                if (size > maxSize)
+                {
+                    size = maxSize;
+                }
+
+                byte[] data = new byte[size];
+
+                context.Memory.Read(position, data);
+
+                Buffer.BlockCopy(data, 0, _storage.Data, (int)writePosition, (int)size);
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // Read(u64) -> buffer<bytes, 0x22>
+        public ResultCode Read(ServiceCtx context)
+        {
+            ulong readPosition = context.RequestData.ReadUInt64();
+
+            if (readPosition > (ulong)_storage.Data.Length)
+            {
+                return ResultCode.OutOfBounds;
+            }
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            size = Math.Min(size, (ulong)_storage.Data.Length - readPosition);
+
+            byte[] data = new byte[size];
+
+            Buffer.BlockCopy(_storage.Data, (int)readPosition, data, 0, (int)size);
+
+            context.Memory.Write(position, data);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Storage/StorageHelper.cs

@@ -0,0 +1,28 @@
+using Ryujinx.Common.Memory;
+using Ryujinx.HLE.HOS.Services.Account.Acc;
+using System.IO;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE.Storage
+{
+    class StorageHelper
+    {
+        private const uint LaunchParamsMagic = 0xc79497ca;
+
+        public static byte[] MakeLaunchParams(UserProfile userProfile)
+        {
+            // Size needs to be at least 0x88 bytes otherwise application errors.
+            using (MemoryStream ms = MemoryStreamManager.Shared.GetStream())
+            {
+                BinaryWriter writer = new BinaryWriter(ms);
+
+                ms.SetLength(0x88);
+
+                writer.Write(LaunchParamsMagic);
+                writer.Write(1);  // IsAccountSelected? Only lower 8 bits actually used.
+                userProfile.UserId.Write(writer);
+
+                return ms.ToArray();
+            }
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Types/AppletId.cs

@@ -0,0 +1,27 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    enum AppletId
+    {
+        Application          = 0x01,
+        OverlayDisplay       = 0x02,
+        QLaunch              = 0x03,
+        Starter              = 0x04,
+        Auth                 = 0x0A,
+        Cabinet              = 0x0B,
+        Controller           = 0x0C,
+        DataErase            = 0x0D,
+        Error                = 0x0E,
+        NetConnect           = 0x0F,
+        PlayerSelect         = 0x10,
+        SoftwareKeyboard     = 0x11,
+        MiiEdit              = 0x12,
+        LibAppletWeb         = 0x13,
+        LibAppletShop        = 0x14,
+        PhotoViewer          = 0x15,
+        Settings             = 0x16,
+        LibAppletOff         = 0x17,
+        LibAppletWhitelisted = 0x18,
+        LibAppletAuth        = 0x19,
+        MyPage               = 0x1A
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Types/AppletIdentityInfo.cs

@@ -0,0 +1,12 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x10)]
+    struct AppletIdentifyInfo
+    {
+        public AppletId AppletId;
+        public uint     Padding;
+        public ulong    TitleId;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Types/AppletProcessLaunchReason.cs

@@ -0,0 +1,12 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x4)]
+    struct AppletProcessLaunchReason
+    {
+        public byte   Flag;
+        public ushort Unknown1;
+        public byte   Unknown2;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Types/LibraryAppletInfo.cs

@@ -0,0 +1,11 @@
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    [StructLayout(LayoutKind.Sequential, Size = 0x8)]
+    struct LibraryAppletInfo
+    {
+        public AppletId          AppletId;
+        public LibraryAppletMode LibraryAppletMode;
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletAE/Types/LibraryAppletMode.cs

@@ -0,0 +1,14 @@
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletAE
+{
+    [Flags]
+    enum LibraryAppletMode : uint
+    {
+        AllForeground,
+        PartialForeground,
+        NoUi,
+        PartialForegroundWithIndirectDisplay,
+        AllForegroundInitiallyHidden
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletOE/ApplicationProxyService/ApplicationProxy/IApplicationFunctions.cs

@@ -0,0 +1,675 @@
+using LibHac.Account;
+using LibHac.Common;
+using LibHac.Fs;
+using LibHac.Ncm;
+using LibHac.Ns;
+using LibHac.Tools.FsSystem.NcaUtils;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.HLE.Exceptions;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Memory;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.Storage;
+using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types;
+using Ryujinx.HLE.HOS.Services.Sdb.Pdm.QueryService;
+using Ryujinx.HLE.HOS.SystemState;
+using Ryujinx.Horizon.Common;
+using System;
+using System.Numerics;
+using System.Threading;
+using AccountUid    = Ryujinx.HLE.HOS.Services.Account.Acc.UserId;
+using ApplicationId = LibHac.Ncm.ApplicationId;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy
+{
+    class IApplicationFunctions : IpcService
+    {
+        private long _defaultSaveDataSize        = 200000000;
+        private long _defaultJournalSaveDataSize = 200000000;
+
+        private KEvent _gpuErrorDetectedSystemEvent;
+        private KEvent _friendInvitationStorageChannelEvent;
+        private KEvent _notificationStorageChannelEvent;
+        private KEvent _healthWarningDisappearedSystemEvent;
+
+        private int _gpuErrorDetectedSystemEventHandle;
+        private int _friendInvitationStorageChannelEventHandle;
+        private int _notificationStorageChannelEventHandle;
+        private int _healthWarningDisappearedSystemEventHandle;
+
+        private bool _gamePlayRecordingState;
+
+        private int _jitLoaded;
+
+        private LibHac.HorizonClient _horizon;
+
+        public IApplicationFunctions(Horizon system)
+        {
+            // TODO: Find where they are signaled.
+            _gpuErrorDetectedSystemEvent         = new KEvent(system.KernelContext);
+            _friendInvitationStorageChannelEvent = new KEvent(system.KernelContext);
+            _notificationStorageChannelEvent     = new KEvent(system.KernelContext);
+            _healthWarningDisappearedSystemEvent = new KEvent(system.KernelContext);
+
+            _horizon = system.LibHacHorizonManager.AmClient;
+        }
+
+        [CommandCmif(1)]
+        // PopLaunchParameter(LaunchParameterKind kind) -> object<nn::am::service::IStorage>
+        public ResultCode PopLaunchParameter(ServiceCtx context)
+        {
+            LaunchParameterKind kind = (LaunchParameterKind)context.RequestData.ReadUInt32();
+
+            byte[] storageData;
+
+            switch (kind)
+            {
+                case LaunchParameterKind.UserChannel:
+                    storageData = context.Device.Configuration.UserChannelPersistence.Pop();
+                    break;
+                case LaunchParameterKind.PreselectedUser:
+                    // Only the first 0x18 bytes of the Data seems to be actually used.
+                    storageData = StorageHelper.MakeLaunchParams(context.Device.System.AccountManager.LastOpenedUser);
+                    break;
+                case LaunchParameterKind.Unknown:
+                    throw new NotImplementedException("Unknown LaunchParameterKind.");
+                default:
+                    return ResultCode.ObjectInvalid;
+            }
+
+            if (storageData == null)
+            {
+                return ResultCode.NotAvailable;
+            }
+
+            MakeObject(context, new AppletAE.IStorage(storageData));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)] // 4.0.0+
+        // CreateApplicationAndRequestToStart(u64 title_id)
+        public ResultCode CreateApplicationAndRequestToStart(ServiceCtx context)
+        {
+            ulong titleId = context.RequestData.ReadUInt64();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { titleId });
+
+            if (titleId == 0)
+            {
+                context.Device.UiHandler.ExecuteProgram(context.Device, ProgramSpecifyKind.RestartProgram, titleId);
+            }
+            else
+            {
+                throw new NotImplementedException();
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(20)]
+        // EnsureSaveData(nn::account::Uid) -> u64
+        public ResultCode EnsureSaveData(ServiceCtx context)
+        {
+            Uid userId = context.RequestData.ReadStruct<AccountUid>().ToLibHacUid();
+
+            // Mask out the low nibble of the program ID to get the application ID
+            ApplicationId applicationId = new ApplicationId(context.Device.Processes.ActiveApplication.ProgramId & ~0xFul);
+
+            ApplicationControlProperty nacp = context.Device.Processes.ActiveApplication.ApplicationControlProperties;
+
+            LibHac.HorizonClient hos = context.Device.System.LibHacHorizonManager.AmClient;
+            LibHac.Result result = hos.Fs.EnsureApplicationSaveData(out long requiredSize, applicationId, in nacp, in userId);
+
+            context.ResponseData.Write(requiredSize);
+
+            return (ResultCode)result.Value;
+        }
+
+        [CommandCmif(21)]
+        // GetDesiredLanguage() -> nn::settings::LanguageCode
+        public ResultCode GetDesiredLanguage(ServiceCtx context)
+        {
+            // This seems to be calling ns:am GetApplicationDesiredLanguage followed by ConvertApplicationLanguageToLanguageCode
+            // Calls are from a IReadOnlyApplicationControlDataInterface object
+            // ConvertApplicationLanguageToLanguageCode compares language code strings and returns the index
+            // TODO: When above calls are implemented, switch to using ns:am
+
+            long desiredLanguageCode = context.Device.System.State.DesiredLanguageCode;
+            int  supportedLanguages  = (int)context.Device.Processes.ActiveApplication.ApplicationControlProperties.SupportedLanguageFlag;
+            int  firstSupported      = BitOperations.TrailingZeroCount(supportedLanguages);
+
+            if (firstSupported > (int)TitleLanguage.BrazilianPortuguese)
+            {
+                Logger.Warning?.Print(LogClass.ServiceAm, "Application has zero supported languages");
+
+                context.ResponseData.Write(desiredLanguageCode);
+
+                return ResultCode.Success;
+            }
+
+            // If desired language is not supported by application, use first supported language from TitleLanguage.
+            // TODO: In the future, a GUI could enable user-specified search priority
+            if (((1 << (int)context.Device.System.State.DesiredTitleLanguage) & supportedLanguages) == 0)
+            {
+                SystemLanguage newLanguage = Enum.Parse<SystemLanguage>(Enum.GetName(typeof(TitleLanguage), firstSupported));
+                desiredLanguageCode = SystemStateMgr.GetLanguageCode((int)newLanguage);
+
+                Logger.Info?.Print(LogClass.ServiceAm, $"Application doesn't support configured language. Using {newLanguage}");
+            }
+
+            context.ResponseData.Write(desiredLanguageCode);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(22)]
+        // SetTerminateResult(u32)
+        public ResultCode SetTerminateResult(ServiceCtx context)
+        {
+            LibHac.Result result = new LibHac.Result(context.RequestData.ReadUInt32());
+
+            Logger.Info?.Print(LogClass.ServiceAm, $"Result = 0x{result.Value:x8} ({result.ToStringWithName()}).");
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(23)]
+        // GetDisplayVersion() -> nn::oe::DisplayVersion
+        public ResultCode GetDisplayVersion(ServiceCtx context)
+        {
+            // If an NACP isn't found, the buffer will be all '\0' which seems to be the correct implementation.
+            context.ResponseData.Write(context.Device.Processes.ActiveApplication.ApplicationControlProperties.DisplayVersion);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(25)] // 3.0.0+
+        // ExtendSaveData(u8 save_data_type, nn::account::Uid, s64 save_size, s64 journal_size) -> u64 result_code
+        public ResultCode ExtendSaveData(ServiceCtx context)
+        {
+            SaveDataType saveDataType = (SaveDataType)context.RequestData.ReadUInt64();
+            Uid          userId       = context.RequestData.ReadStruct<Uid>();
+            long        saveDataSize  = context.RequestData.ReadInt64();
+            long        journalSize   = context.RequestData.ReadInt64();
+
+            // NOTE: Service calls nn::fs::ExtendApplicationSaveData.
+            //       Since LibHac currently doesn't support this method, we can stub it for now.
+
+            _defaultSaveDataSize        = saveDataSize;
+            _defaultJournalSaveDataSize = journalSize;
+
+            context.ResponseData.Write((uint)ResultCode.Success);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { saveDataType, userId, saveDataSize, journalSize });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(26)] // 3.0.0+
+        // GetSaveDataSize(u8 save_data_type, nn::account::Uid) -> (s64 save_size, s64 journal_size)
+        public ResultCode GetSaveDataSize(ServiceCtx context)
+        {
+            SaveDataType saveDataType = (SaveDataType)context.RequestData.ReadUInt64();
+            Uid          userId       = context.RequestData.ReadStruct<Uid>();
+
+            // NOTE: Service calls nn::fs::FindSaveDataWithFilter with SaveDataType = 1 hardcoded.
+            //       Then it calls nn::fs::GetSaveDataAvailableSize and nn::fs::GetSaveDataJournalSize to get the sizes.
+            //       Since LibHac currently doesn't support the 2 last methods, we can hardcode the values to 200mb.
+
+            context.ResponseData.Write(_defaultSaveDataSize);
+            context.ResponseData.Write(_defaultJournalSaveDataSize);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { saveDataType, userId });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(27)] // 5.0.0+
+        // CreateCacheStorage(u16 index, s64 save_size, s64 journal_size) -> (u32 storageTarget, u64 requiredSize)
+        public ResultCode CreateCacheStorage(ServiceCtx context)
+        {
+            ushort index = (ushort)context.RequestData.ReadUInt64();
+            long saveSize = context.RequestData.ReadInt64();
+            long journalSize = context.RequestData.ReadInt64();
+
+            // Mask out the low nibble of the program ID to get the application ID
+            ApplicationId applicationId = new ApplicationId(context.Device.Processes.ActiveApplication.ProgramId & ~0xFul);
+
+            ApplicationControlProperty nacp = context.Device.Processes.ActiveApplication.ApplicationControlProperties;
+
+            LibHac.Result result = _horizon.Fs.CreateApplicationCacheStorage(out long requiredSize,
+                out CacheStorageTargetMedia storageTarget, applicationId, in nacp, index, saveSize, journalSize);
+
+            if (result.IsFailure()) return (ResultCode)result.Value;
+
+            context.ResponseData.Write((ulong)storageTarget);
+            context.ResponseData.Write(requiredSize);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(28)] // 11.0.0+
+        // GetSaveDataSizeMax() -> (s64 save_size_max, s64 journal_size_max)
+        public ResultCode GetSaveDataSizeMax(ServiceCtx context)
+        {
+            // NOTE: We are currently using a stub for GetSaveDataSize() which returns the default values.
+            //       For this method we shouldn't return anything lower than that, but since we aren't interacting
+            //       with fs to get the actual sizes, we return the default values here as well.
+            //       This also helps in case ExtendSaveData() has been executed and the default values were modified.
+
+            context.ResponseData.Write(_defaultSaveDataSize);
+            context.ResponseData.Write(_defaultJournalSaveDataSize);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(30)]
+        // BeginBlockingHomeButtonShortAndLongPressed()
+        public ResultCode BeginBlockingHomeButtonShortAndLongPressed(ServiceCtx context)
+        {
+            // NOTE: This set two internal fields at offsets 0x89 and 0x8B to value 1 then it signals an internal event.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(31)]
+        // EndBlockingHomeButtonShortAndLongPressed()
+        public ResultCode EndBlockingHomeButtonShortAndLongPressed(ServiceCtx context)
+        {
+            // NOTE: This set two internal fields at offsets 0x89 and 0x8B to value 0 then it signals an internal event.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(32)] // 2.0.0+
+        // BeginBlockingHomeButton(u64 nano_second)
+        public ResultCode BeginBlockingHomeButton(ServiceCtx context)
+        {
+            ulong nanoSeconds = context.RequestData.ReadUInt64();
+
+            // NOTE: This set two internal fields at offsets 0x89 to value 1 and 0x90 to value of "nanoSeconds" then it signals an internal event.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { nanoSeconds });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(33)] // 2.0.0+
+        // EndBlockingHomeButton()
+        public ResultCode EndBlockingHomeButton(ServiceCtx context)
+        {
+            // NOTE: This set two internal fields at offsets 0x89 and 0x90 to value 0 then it signals an internal event.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(40)]
+        // NotifyRunning() -> b8
+        public ResultCode NotifyRunning(ServiceCtx context)
+        {
+            context.ResponseData.Write(true);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(50)] // 2.0.0+
+        // GetPseudoDeviceId() -> nn::util::Uuid
+        public ResultCode GetPseudoDeviceId(ServiceCtx context)
+        {
+            context.ResponseData.Write(0L);
+            context.ResponseData.Write(0L);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(60)] // 2.0.0+
+        // SetMediaPlaybackStateForApplication(bool enabled)
+        public ResultCode SetMediaPlaybackStateForApplication(ServiceCtx context)
+        {
+            bool enabled = context.RequestData.ReadBoolean();
+
+            // NOTE: Service stores the "enabled" value in a private field, when enabled is false, it stores nn::os::GetSystemTick() too.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { enabled });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(65)] // 3.0.0+
+        // IsGamePlayRecordingSupported() -> u8
+        public ResultCode IsGamePlayRecordingSupported(ServiceCtx context)
+        {
+            context.ResponseData.Write(_gamePlayRecordingState);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(66)] // 3.0.0+
+        // InitializeGamePlayRecording(u64, handle<copy>)
+        public ResultCode InitializeGamePlayRecording(ServiceCtx context)
+        {
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(67)] // 3.0.0+
+        // SetGamePlayRecordingState(u32)
+        public ResultCode SetGamePlayRecordingState(ServiceCtx context)
+        {
+            _gamePlayRecordingState = context.RequestData.ReadInt32() != 0;
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { _gamePlayRecordingState });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(90)] // 4.0.0+
+        // EnableApplicationCrashReport(u8)
+        public ResultCode EnableApplicationCrashReport(ServiceCtx context)
+        {
+            bool applicationCrashReportEnabled = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { applicationCrashReportEnabled });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(100)] // 5.0.0+
+        // InitializeApplicationCopyrightFrameBuffer(s32 width, s32 height, handle<copy, transfer_memory> transfer_memory, u64 transfer_memory_size)
+        public ResultCode InitializeApplicationCopyrightFrameBuffer(ServiceCtx context)
+        {
+            int   width                 = context.RequestData.ReadInt32();
+            int   height                = context.RequestData.ReadInt32();
+            ulong transferMemorySize    = context.RequestData.ReadUInt64();
+            int   transferMemoryHandle  = context.Request.HandleDesc.ToCopy[0];
+            ulong transferMemoryAddress = context.Process.HandleTable.GetObject<KTransferMemory>(transferMemoryHandle).Address;
+
+            ResultCode resultCode = ResultCode.InvalidParameters;
+
+            if (((transferMemorySize & 0x3FFFF) == 0) && width <= 1280 && height <= 720)
+            {
+                resultCode = InitializeApplicationCopyrightFrameBufferImpl(transferMemoryAddress, transferMemorySize, width, height);
+            }
+
+            if (transferMemoryHandle != 0)
+            {
+                context.Device.System.KernelContext.Syscall.CloseHandle(transferMemoryHandle);
+            }
+
+            return resultCode;
+        }
+
+        private ResultCode InitializeApplicationCopyrightFrameBufferImpl(ulong transferMemoryAddress, ulong transferMemorySize, int width, int height)
+        {
+            if ((transferMemorySize & 0x3FFFF) != 0)
+            {
+                return ResultCode.InvalidParameters;
+            }
+
+            ResultCode resultCode;
+
+            // if (_copyrightBuffer == null)
+            {
+                // TODO: Initialize buffer and object.
+
+                Logger.Stub?.PrintStub(LogClass.ServiceAm, new { transferMemoryAddress, transferMemorySize, width, height });
+
+                resultCode = ResultCode.Success;
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(101)] // 5.0.0+
+        // SetApplicationCopyrightImage(buffer<bytes, 0x45> frame_buffer, s32 x, s32 y, s32 width, s32 height, s32 window_origin_mode)
+        public ResultCode SetApplicationCopyrightImage(ServiceCtx context)
+        {
+            ulong frameBufferPos   = context.Request.SendBuff[0].Position;
+            ulong frameBufferSize  = context.Request.SendBuff[0].Size;
+            int   x                = context.RequestData.ReadInt32();
+            int   y                = context.RequestData.ReadInt32();
+            int   width            = context.RequestData.ReadInt32();
+            int   height           = context.RequestData.ReadInt32();
+            uint  windowOriginMode = context.RequestData.ReadUInt32();
+
+            ResultCode resultCode = ResultCode.InvalidParameters;
+
+            if (((y | x) >= 0) && width >= 1 && height >= 1)
+            {
+                ResultCode result = SetApplicationCopyrightImageImpl(x, y, width, height, frameBufferPos, frameBufferSize, windowOriginMode);
+
+                if (result != ResultCode.Success)
+                {
+                    resultCode = result;
+                }
+                else
+                {
+                    resultCode = ResultCode.Success;
+                }
+            }
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { frameBufferPos, frameBufferSize, x, y, width, height, windowOriginMode });
+
+            return resultCode;
+        }
+
+        private ResultCode SetApplicationCopyrightImageImpl(int x, int y, int width, int height, ulong frameBufferPos, ulong frameBufferSize, uint windowOriginMode)
+        {
+            /*
+            if (_copyrightBuffer == null)
+            {
+                return ResultCode.NullCopyrightObject;
+            }
+            */
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { x, y, width, height, frameBufferPos, frameBufferSize, windowOriginMode });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(102)] // 5.0.0+
+        // SetApplicationCopyrightVisibility(bool visible)
+        public ResultCode SetApplicationCopyrightVisibility(ServiceCtx context)
+        {
+            bool visible = context.RequestData.ReadBoolean();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { visible });
+
+            // NOTE: It sets an internal field and return ResultCode.Success in all case.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(110)] // 5.0.0+
+        // QueryApplicationPlayStatistics(buffer<bytes, 5> title_id_list) -> (buffer<bytes, 6> entries, s32 entries_count)
+        public ResultCode QueryApplicationPlayStatistics(ServiceCtx context)
+        {
+            // TODO: Call pdm:qry cmd 13 when IPC call between services will be implemented.
+            return (ResultCode)QueryPlayStatisticsManager.GetPlayStatistics(context);
+        }
+
+        [CommandCmif(111)] // 6.0.0+
+        // QueryApplicationPlayStatisticsByUid(nn::account::Uid, buffer<bytes, 5> title_id_list) -> (buffer<bytes, 6> entries, s32 entries_count)
+        public ResultCode QueryApplicationPlayStatisticsByUid(ServiceCtx context)
+        {
+            // TODO: Call pdm:qry cmd 16 when IPC call between services will be implemented.
+            return (ResultCode)QueryPlayStatisticsManager.GetPlayStatistics(context, true);
+        }
+
+        [CommandCmif(120)] // 5.0.0+
+        // ExecuteProgram(ProgramSpecifyKind kind, u64 value)
+        public ResultCode ExecuteProgram(ServiceCtx context)
+        {
+            ProgramSpecifyKind kind = (ProgramSpecifyKind)context.RequestData.ReadUInt32();
+
+            // padding
+            context.RequestData.ReadUInt32();
+
+            ulong value = context.RequestData.ReadUInt64();
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { kind, value });
+
+            context.Device.UiHandler.ExecuteProgram(context.Device, kind, value);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(121)] // 5.0.0+
+        // ClearUserChannel()
+        public ResultCode ClearUserChannel(ServiceCtx context)
+        {
+            context.Device.Configuration.UserChannelPersistence.Clear();
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(122)] // 5.0.0+
+        // UnpopToUserChannel(object<nn::am::service::IStorage> input_storage)
+        public ResultCode UnpopToUserChannel(ServiceCtx context)
+        {
+            AppletAE.IStorage data = GetObject<AppletAE.IStorage>(context, 0);
+
+            context.Device.Configuration.UserChannelPersistence.Push(data.Data);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(123)] // 5.0.0+
+        // GetPreviousProgramIndex() -> s32 program_index
+        public ResultCode GetPreviousProgramIndex(ServiceCtx context)
+        {
+            int previousProgramIndex = context.Device.Configuration.UserChannelPersistence.PreviousIndex;
+
+            context.ResponseData.Write(previousProgramIndex);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm, new { previousProgramIndex });
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(130)] // 8.0.0+
+        // GetGpuErrorDetectedSystemEvent() -> handle<copy>
+        public ResultCode GetGpuErrorDetectedSystemEvent(ServiceCtx context)
+        {
+            if (_gpuErrorDetectedSystemEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_gpuErrorDetectedSystemEvent.ReadableEvent, out _gpuErrorDetectedSystemEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_gpuErrorDetectedSystemEventHandle);
+
+            // NOTE: This is used by "sdk" NSO during applet-application initialization.
+            //       A separate thread is setup where event-waiting is handled.
+            //       When the Event is signaled, official sw will assert.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(140)] // 9.0.0+
+        // GetFriendInvitationStorageChannelEvent() -> handle<copy>
+        public ResultCode GetFriendInvitationStorageChannelEvent(ServiceCtx context)
+        {
+            if (_friendInvitationStorageChannelEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_friendInvitationStorageChannelEvent.ReadableEvent, out _friendInvitationStorageChannelEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_friendInvitationStorageChannelEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(141)] // 9.0.0+
+        // TryPopFromFriendInvitationStorageChannel() -> object<nn::am::service::IStorage>
+        public ResultCode TryPopFromFriendInvitationStorageChannel(ServiceCtx context)
+        {
+            // NOTE: IStorage are pushed in the channel with IApplicationAccessor PushToFriendInvitationStorageChannel
+            //       If _friendInvitationStorageChannelEvent is signaled, the event is cleared.
+            //       If an IStorage is available, returns it with ResultCode.Success.
+            //       If not, just returns ResultCode.NotAvailable. Since we don't support friend feature for now, it's fine to do the same.
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAm);
+
+            return ResultCode.NotAvailable;
+        }
+
+        [CommandCmif(150)] // 9.0.0+
+        // GetNotificationStorageChannelEvent() -> handle<copy>
+        public ResultCode GetNotificationStorageChannelEvent(ServiceCtx context)
+        {
+            if (_notificationStorageChannelEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_notificationStorageChannelEvent.ReadableEvent, out _notificationStorageChannelEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_notificationStorageChannelEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(160)] // 9.0.0+
+        // GetHealthWarningDisappearedSystemEvent() -> handle<copy>
+        public ResultCode GetHealthWarningDisappearedSystemEvent(ServiceCtx context)
+        {
+            if (_healthWarningDisappearedSystemEventHandle == 0)
+            {
+                if (context.Process.HandleTable.GenerateHandle(_healthWarningDisappearedSystemEvent.ReadableEvent, out _healthWarningDisappearedSystemEventHandle) != Result.Success)
+                {
+                    throw new InvalidOperationException("Out of handles!");
+                }
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(_healthWarningDisappearedSystemEventHandle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1001)] // 10.0.0+
+        // PrepareForJit()
+        public ResultCode PrepareForJit(ServiceCtx context)
+        {
+            if (Interlocked.Exchange(ref _jitLoaded, 1) == 0)
+            {
+                string jitPath = context.Device.System.ContentManager.GetInstalledContentPath(0x010000000000003B, StorageId.BuiltInSystem, NcaContentType.Program);
+                string filePath = context.Device.FileSystem.SwitchPathToSystemPath(jitPath);
+
+                if (string.IsNullOrWhiteSpace(filePath))
+                {
+                    throw new InvalidSystemResourceException($"JIT (010000000000003B) system title not found! The JIT will not work, provide the system archive to fix this error. (See https://github.com/Ryujinx/Ryujinx#requirements for more information)");
+                }
+
+                context.Device.LoadNca(filePath);
+
+                // FIXME: Most likely not how this should be done?
+                while (!context.Device.System.SmRegistry.IsServiceRegistered("jit:u"))
+                {
+                    context.Device.System.SmRegistry.WaitForServiceRegistration();
+                }
+            }
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletOE/ApplicationProxyService/ApplicationProxy/Types/LaunchParameterKind.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types
+{
+    public enum LaunchParameterKind : uint
+    {
+        UserChannel = 1,
+        PreselectedUser,
+        Unknown
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletOE/ApplicationProxyService/ApplicationProxy/Types/ProgramSpecifyKind.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy.Types
+{
+    public enum ProgramSpecifyKind : uint
+    {
+        ExecuteProgram,
+        SubApplicationProgram,
+        RestartProgram
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletOE/ApplicationProxyService/IApplicationProxy.cs

@@ -0,0 +1,87 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletAE.AllSystemAppletProxiesService.SystemAppletProxy;
+using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService.ApplicationProxy;
+
+namespace Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService
+{
+    class IApplicationProxy : IpcService
+    {
+        private readonly ulong _pid;
+
+        public IApplicationProxy(ulong pid)
+        {
+            _pid = pid;
+        }
+
+        [CommandCmif(0)]
+        // GetCommonStateGetter() -> object<nn::am::service::ICommonStateGetter>
+        public ResultCode GetCommonStateGetter(ServiceCtx context)
+        {
+            MakeObject(context, new ICommonStateGetter(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // GetSelfController() -> object<nn::am::service::ISelfController>
+        public ResultCode GetSelfController(ServiceCtx context)
+        {
+            MakeObject(context, new ISelfController(context, _pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(2)]
+        // GetWindowController() -> object<nn::am::service::IWindowController>
+        public ResultCode GetWindowController(ServiceCtx context)
+        {
+            MakeObject(context, new IWindowController(_pid));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)]
+        // GetAudioController() -> object<nn::am::service::IAudioController>
+        public ResultCode GetAudioController(ServiceCtx context)
+        {
+            MakeObject(context, new IAudioController());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)]
+        // GetDisplayController() -> object<nn::am::service::IDisplayController>
+        public ResultCode GetDisplayController(ServiceCtx context)
+        {
+            MakeObject(context, new IDisplayController(context));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)]
+        // GetLibraryAppletCreator() -> object<nn::am::service::ILibraryAppletCreator>
+        public ResultCode GetLibraryAppletCreator(ServiceCtx context)
+        {
+            MakeObject(context, new ILibraryAppletCreator());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(20)]
+        // GetApplicationFunctions() -> object<nn::am::service::IApplicationFunctions>
+        public ResultCode GetApplicationFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IApplicationFunctions(context.Device.System));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1000)]
+        // GetDebugFunctions() -> object<nn::am::service::IDebugFunctions>
+        public ResultCode GetDebugFunctions(ServiceCtx context)
+        {
+            MakeObject(context, new IDebugFunctions());
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/AppletOE/IApplicationProxyService.cs

@@ -0,0 +1,19 @@
+using Ryujinx.HLE.HOS.Services.Am.AppletOE.ApplicationProxyService;
+
+namespace Ryujinx.HLE.HOS.Services.Am
+{
+    [Service("appletOE")]
+    class IApplicationProxyService : IpcService
+    {
+        public IApplicationProxyService(ServiceCtx context) { }
+
+        [CommandCmif(0)]
+        // OpenApplicationProxy(u64, pid, handle<copy>) -> object<nn::am::service::IApplicationProxy>
+        public ResultCode OpenApplicationProxy(ServiceCtx context)
+        {
+            MakeObject(context, new IApplicationProxy(context.Request.HandleDesc.PId));
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/Idle/IPolicyManagerSystem.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.Idle
+{
+    [Service("idle:sys")]
+    class IPolicyManagerSystem : IpcService
+    {
+        public IPolicyManagerSystem(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/Omm/IOperationModeManager.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.Omm
+{
+    [Service("omm")]
+    class IOperationModeManager : IpcService
+    {
+        public IOperationModeManager(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/ResultCode.cs

@@ -0,0 +1,30 @@
+namespace Ryujinx.HLE.HOS.Services.Am
+{
+    enum ResultCode
+    {
+        ModuleId       = 128,
+        ErrorCodeShift = 9,
+
+        Success = 0,
+
+        NotAvailable           = (2   << ErrorCodeShift) | ModuleId,
+        NoMessages             = (3   << ErrorCodeShift) | ModuleId,
+        AppletLaunchFailed     = (35  << ErrorCodeShift) | ModuleId,
+        TitleIdNotFound        = (37  << ErrorCodeShift) | ModuleId,
+        ObjectInvalid          = (500 << ErrorCodeShift) | ModuleId,
+        IStorageInUse          = (502 << ErrorCodeShift) | ModuleId,
+        OutOfBounds            = (503 << ErrorCodeShift) | ModuleId,
+        BufferNotAcquired      = (504 << ErrorCodeShift) | ModuleId,
+        BufferAlreadyAcquired  = (505 << ErrorCodeShift) | ModuleId,
+        InvalidParameters      = (506 << ErrorCodeShift) | ModuleId,
+        OpenedAsWrongType      = (511 << ErrorCodeShift) | ModuleId,
+        UnbalancedFatalSection = (512 << ErrorCodeShift) | ModuleId,
+        NullObject             = (518 << ErrorCodeShift) | ModuleId,
+        MemoryAllocationFailed = (600 << ErrorCodeShift) | ModuleId,
+        StackPoolExhausted     = (712 << ErrorCodeShift) | ModuleId,
+        DebugModeNotEnabled    = (974 << ErrorCodeShift) | ModuleId,
+        DevFunctionNotEnabled  = (980 << ErrorCodeShift) | ModuleId,
+        NotImplemented         = (998 << ErrorCodeShift) | ModuleId,
+        Stubbed                = (999 << ErrorCodeShift) | ModuleId
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/Spsm/IPowerStateInterface.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.Spsm
+{
+    [Service("spsm")]
+    class IPowerStateInterface : IpcService
+    {
+        public IPowerStateInterface(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Am/Tcap/IManager.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Am.Tcap
+{
+    [Service("tcap")]
+    class IManager : IpcService
+    {
+        public IManager(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/IManager.cs

@@ -0,0 +1,43 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    abstract class IManager : IpcService
+    {
+        public IManager(ServiceCtx context) { }
+
+        protected abstract ResultCode OpenSession(out SessionServer sessionServer);
+        protected abstract PerformanceMode GetPerformanceMode();
+        protected abstract bool IsCpuOverclockEnabled();
+
+        [CommandCmif(0)]
+        // OpenSession() -> object<nn::apm::ISession>
+        public ResultCode OpenSession(ServiceCtx context)
+        {
+            ResultCode resultCode = OpenSession(out SessionServer sessionServer);
+
+            if (resultCode == ResultCode.Success)
+            {
+                MakeObject(context, sessionServer);
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(1)]
+        // GetPerformanceMode() -> nn::apm::PerformanceMode
+        public ResultCode GetPerformanceMode(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)GetPerformanceMode());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(6)] // 7.0.0+
+        // IsCpuOverclockEnabled() -> bool
+        public ResultCode IsCpuOverclockEnabled(ServiceCtx context)
+        {
+            context.ResponseData.Write(IsCpuOverclockEnabled());
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/IManagerPrivileged.cs

@@ -0,0 +1,19 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    // NOTE: This service doesn’t exist anymore after firmware 7.0.1. But some outdated homebrew still uses it.
+
+    [Service("apm:p")] // 1.0.0-7.0.1
+    class IManagerPrivileged : IpcService
+    {
+        public IManagerPrivileged(ServiceCtx context) { }
+
+        [CommandCmif(0)]
+        // OpenSession() -> object<nn::apm::ISession>
+        public ResultCode OpenSession(ServiceCtx context)
+        {
+            MakeObject(context, new SessionServer(context));
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/ISession.cs

@@ -0,0 +1,45 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    abstract class ISession : IpcService
+    {
+        public ISession(ServiceCtx context) { }
+
+        protected abstract ResultCode SetPerformanceConfiguration(PerformanceMode performanceMode, PerformanceConfiguration performanceConfiguration);
+        protected abstract ResultCode GetPerformanceConfiguration(PerformanceMode performanceMode, out PerformanceConfiguration performanceConfiguration);
+        protected abstract void SetCpuOverclockEnabled(bool enabled);
+
+        [CommandCmif(0)]
+        // SetPerformanceConfiguration(nn::apm::PerformanceMode, nn::apm::PerformanceConfiguration)
+        public ResultCode SetPerformanceConfiguration(ServiceCtx context)
+        {
+            PerformanceMode          performanceMode          = (PerformanceMode)context.RequestData.ReadInt32();
+            PerformanceConfiguration performanceConfiguration = (PerformanceConfiguration)context.RequestData.ReadInt32();
+
+            return SetPerformanceConfiguration(performanceMode, performanceConfiguration);
+        }
+
+        [CommandCmif(1)]
+        // GetPerformanceConfiguration(nn::apm::PerformanceMode) -> nn::apm::PerformanceConfiguration
+        public ResultCode GetPerformanceConfiguration(ServiceCtx context)
+        {
+            PerformanceMode performanceMode = (PerformanceMode)context.RequestData.ReadInt32();
+
+            ResultCode resultCode = GetPerformanceConfiguration(performanceMode, out PerformanceConfiguration performanceConfiguration);
+
+            context.ResponseData.Write((uint)performanceConfiguration);
+
+            return resultCode;
+        }
+
+        [CommandCmif(2)] // 8.0.0+
+        // SetCpuOverclockEnabled(bool)
+        public ResultCode SetCpuOverclockEnabled(ServiceCtx context)
+        {
+            bool enabled = context.RequestData.ReadBoolean();
+
+            SetCpuOverclockEnabled(enabled);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/ISystemManager.cs

@@ -0,0 +1,42 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    abstract class ISystemManager : IpcService
+    {
+        public ISystemManager(ServiceCtx context) { }
+
+        protected abstract void RequestPerformanceMode(PerformanceMode performanceMode);
+        internal abstract void SetCpuBoostMode(CpuBoostMode cpuBoostMode);
+        protected abstract PerformanceConfiguration GetCurrentPerformanceConfiguration();
+
+        [CommandCmif(0)]
+        // RequestPerformanceMode(nn::apm::PerformanceMode)
+        public ResultCode RequestPerformanceMode(ServiceCtx context)
+        {
+            RequestPerformanceMode((PerformanceMode)context.RequestData.ReadInt32());
+
+            // NOTE: This call seems to overclock the system related to the PerformanceMode, since we emulate it, it's fine to do nothing instead.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(6)] // 7.0.0+
+        // SetCpuBoostMode(nn::apm::CpuBootMode)
+        public ResultCode SetCpuBoostMode(ServiceCtx context)
+        {
+            SetCpuBoostMode((CpuBoostMode)context.RequestData.ReadUInt32());
+
+            // NOTE: This call seems to overclock the system related to the CpuBoostMode, since we emulate it, it's fine to do nothing instead.
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(7)] // 7.0.0+
+        // GetCurrentPerformanceConfiguration() -> nn::apm::PerformanceConfiguration
+        public ResultCode GetCurrentPerformanceConfiguration(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)GetCurrentPerformanceConfiguration());
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/ManagerServer.cs

@@ -0,0 +1,31 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    [Service("apm")]
+    [Service("apm:am")] // 8.0.0+
+    class ManagerServer : IManager
+    {
+        private readonly ServiceCtx _context;
+
+        public ManagerServer(ServiceCtx context) : base(context)
+        {
+            _context = context;
+        }
+
+        protected override ResultCode OpenSession(out SessionServer sessionServer)
+        {
+            sessionServer = new SessionServer(_context);
+
+            return ResultCode.Success;
+        }
+
+        protected override PerformanceMode GetPerformanceMode()
+        {
+            return _context.Device.System.PerformanceState.PerformanceMode;
+        }
+
+        protected override bool IsCpuOverclockEnabled()
+        {
+            return _context.Device.System.PerformanceState.CpuOverclockEnabled;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/PerformanceState.cs

@@ -0,0 +1,25 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    class PerformanceState
+    {
+        public PerformanceState() { }
+
+        public bool CpuOverclockEnabled = false;
+
+        public PerformanceMode PerformanceMode = PerformanceMode.Default;
+        public CpuBoostMode    CpuBoostMode    = CpuBoostMode.Disabled;
+
+        public PerformanceConfiguration DefaultPerformanceConfiguration = PerformanceConfiguration.PerformanceConfiguration7;
+        public PerformanceConfiguration BoostPerformanceConfiguration   = PerformanceConfiguration.PerformanceConfiguration8;
+
+        public PerformanceConfiguration GetCurrentPerformanceConfiguration(PerformanceMode performanceMode)
+        {
+            return performanceMode switch
+            {
+                PerformanceMode.Default => DefaultPerformanceConfiguration,
+                PerformanceMode.Boost   => BoostPerformanceConfiguration,
+                _                       => PerformanceConfiguration.PerformanceConfiguration7
+            };
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/ResultCode.cs

@@ -0,0 +1,12 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum ResultCode
+    {
+        ModuleId       = 148,
+        ErrorCodeShift = 9,
+
+        Success = 0,
+
+        InvalidParameters = (1 << ErrorCodeShift) | ModuleId
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/SessionServer.cs

@@ -0,0 +1,58 @@
+using Ryujinx.Common.Logging;
+
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    class SessionServer : ISession
+    {
+        private readonly ServiceCtx _context;
+
+        public SessionServer(ServiceCtx context) : base(context) 
+        {
+            _context = context;
+        }
+
+        protected override ResultCode SetPerformanceConfiguration(PerformanceMode performanceMode, PerformanceConfiguration performanceConfiguration)
+        {
+            if (performanceMode > PerformanceMode.Boost)
+            {
+                return ResultCode.InvalidParameters;
+            }
+
+            switch (performanceMode)
+            {
+                case PerformanceMode.Default:
+                    _context.Device.System.PerformanceState.DefaultPerformanceConfiguration = performanceConfiguration;
+                    break;
+                case PerformanceMode.Boost:
+                    _context.Device.System.PerformanceState.BoostPerformanceConfiguration = performanceConfiguration;
+                    break;
+                default:
+                    Logger.Error?.Print(LogClass.ServiceApm, $"PerformanceMode isn't supported: {performanceMode}");
+                    break;
+            }
+
+            return ResultCode.Success;
+        }
+
+        protected override ResultCode GetPerformanceConfiguration(PerformanceMode performanceMode, out PerformanceConfiguration performanceConfiguration)
+        {
+            if (performanceMode > PerformanceMode.Boost)
+            {
+                performanceConfiguration = 0;
+
+                return ResultCode.InvalidParameters;
+            }
+
+            performanceConfiguration = _context.Device.System.PerformanceState.GetCurrentPerformanceConfiguration(performanceMode);
+
+            return ResultCode.Success;
+        }
+
+        protected override void SetCpuOverclockEnabled(bool enabled)
+        {
+            _context.Device.System.PerformanceState.CpuOverclockEnabled = enabled;
+
+            // NOTE: This call seems to overclock the system, since we emulate it, it's fine to do nothing instead.
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/SystemManagerServer.cs

@@ -0,0 +1,28 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    [Service("apm:sys")]
+    class SystemManagerServer : ISystemManager
+    {
+        private readonly ServiceCtx _context;
+
+        public SystemManagerServer(ServiceCtx context) : base(context)
+        {
+            _context = context;
+        }
+
+        protected override void RequestPerformanceMode(PerformanceMode performanceMode)
+        {
+            _context.Device.System.PerformanceState.PerformanceMode = performanceMode;
+        }
+
+        internal override void SetCpuBoostMode(CpuBoostMode cpuBoostMode)
+        {
+            _context.Device.System.PerformanceState.CpuBoostMode = cpuBoostMode;
+        }
+
+        protected override PerformanceConfiguration GetCurrentPerformanceConfiguration()
+        {
+            return _context.Device.System.PerformanceState.GetCurrentPerformanceConfiguration(_context.Device.System.PerformanceState.PerformanceMode);
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/Types/CpuBoostMode.cs

@@ -0,0 +1,9 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum CpuBoostMode
+    {
+        Disabled      = 0,
+        BoostCPU      = 1, // Uses PerformanceConfiguration13 and PerformanceConfiguration14, or PerformanceConfiguration15 and PerformanceConfiguration16
+        ConservePower = 2  // Uses PerformanceConfiguration15 and PerformanceConfiguration16.
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/Types/PerformanceConfiguration.cs

@@ -0,0 +1,22 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum PerformanceConfiguration : uint  // Clocks are all in MHz.
+    {                                            // CPU  | GPU   | RAM    | NOTE
+        PerformanceConfiguration1  = 0x00010000, // 1020 | 384   | 1600   | Only available while docked.
+        PerformanceConfiguration2  = 0x00010001, // 1020 | 768   | 1600   | Only available while docked.
+        PerformanceConfiguration3  = 0x00010002, // 1224 | 691.2 | 1600   | Only available for SDEV units.
+        PerformanceConfiguration4  = 0x00020000, // 1020 | 230.4 | 1600   | Only available for SDEV units.
+        PerformanceConfiguration5  = 0x00020001, // 1020 | 307.2 | 1600   |
+        PerformanceConfiguration6  = 0x00020002, // 1224 | 230.4 | 1600   |
+        PerformanceConfiguration7  = 0x00020003, // 1020 | 307   | 1331.2 |
+        PerformanceConfiguration8  = 0x00020004, // 1020 | 384   | 1331.2 |
+        PerformanceConfiguration9  = 0x00020005, // 1020 | 307.2 | 1065.6 |
+        PerformanceConfiguration10 = 0x00020006, // 1020 | 384   | 1065.6 |
+        PerformanceConfiguration11 = 0x92220007, // 1020 | 460.8 | 1600   |
+        PerformanceConfiguration12 = 0x92220008, // 1020 | 460.8 | 1331.2 |
+        PerformanceConfiguration13 = 0x92220009, // 1785 | 768   | 1600   | 7.0.0+
+        PerformanceConfiguration14 = 0x9222000A, // 1785 | 768   | 1331.2 | 7.0.0+
+        PerformanceConfiguration15 = 0x9222000B, // 1020 | 768   | 1600   | 7.0.0+
+        PerformanceConfiguration16 = 0x9222000C  // 1020 | 768   | 1331.2 | 7.0.0+
+    }
+}

src/Ryujinx.HLE/HOS/Services/Apm/Types/PerformanceMode.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Apm
+{
+    enum PerformanceMode : uint
+    {
+        Default = 0,
+        Boost   = 1
+    }
+}

src/Ryujinx.HLE/HOS/Services/Arp/ApplicationLaunchProperty.cs

@@ -0,0 +1,43 @@
+using LibHac.Ncm;
+
+namespace Ryujinx.HLE.HOS.Services.Arp
+{
+    class ApplicationLaunchProperty
+    {
+        public ulong TitleId;
+        public int   Version;
+        public byte  BaseGameStorageId;
+        public byte  UpdateGameStorageId;
+#pragma warning disable CS0649
+        public short Padding;
+#pragma warning restore CS0649
+
+        public static ApplicationLaunchProperty Default
+        {
+            get
+            {
+                return new ApplicationLaunchProperty
+                {
+                    TitleId             = 0x00,
+                    Version             = 0x00,
+                    BaseGameStorageId   = (byte)StorageId.BuiltInSystem,
+                    UpdateGameStorageId = (byte)StorageId.None
+                };
+            }
+        }
+
+        public static ApplicationLaunchProperty GetByPid(ServiceCtx context)
+        {
+            // TODO: Handle ApplicationLaunchProperty as array when pid will be supported and return the right item.
+            //       For now we can hardcode values, and fix it after GetApplicationLaunchProperty is implemented.
+
+            return new ApplicationLaunchProperty
+            {
+                TitleId             = context.Device.Processes.ActiveApplication.ProgramId,
+                Version             = 0x00,
+                BaseGameStorageId   = (byte)StorageId.BuiltInSystem,
+                UpdateGameStorageId = (byte)StorageId.None
+            };
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Arp/IReader.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Arp
+{
+    [Service("arp:r")]
+    class IReader : IpcService
+    {
+        public IReader(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Arp/IWriter.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.HLE.HOS.Services.Arp
+{
+    [Service("arp:w")]
+    class IWriter : IpcService
+    {
+        public IWriter(ServiceCtx context) { }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Arp/LibHacIReader.cs

@@ -0,0 +1,76 @@
+using LibHac;
+using LibHac.Common;
+using LibHac.Ncm;
+using LibHac.Ns;
+using System;
+
+using ApplicationId = LibHac.ApplicationId;
+
+namespace Ryujinx.HLE.HOS.Services.Arp
+{
+    class LibHacIReader : LibHac.Arp.Impl.IReader
+    {
+        public ApplicationId ApplicationId { get; set; }
+
+        public Result GetApplicationLaunchProperty(out LibHac.Arp.ApplicationLaunchProperty launchProperty, ulong processId)
+        {
+            launchProperty = new LibHac.Arp.ApplicationLaunchProperty
+            {
+                StorageId = StorageId.BuiltInUser,
+                ApplicationId = ApplicationId
+            };
+
+            return Result.Success;
+        }
+
+        public void Dispose() { }
+
+        public Result GetApplicationLaunchPropertyWithApplicationId(out LibHac.Arp.ApplicationLaunchProperty launchProperty, ApplicationId applicationId)
+        {
+            launchProperty = new LibHac.Arp.ApplicationLaunchProperty
+            {
+                StorageId = StorageId.BuiltInUser,
+                ApplicationId = applicationId
+            };
+
+            return Result.Success;
+        }
+
+        public Result GetApplicationControlProperty(out ApplicationControlProperty controlProperty, ulong processId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetApplicationControlPropertyWithApplicationId(out ApplicationControlProperty controlProperty, ApplicationId applicationId)
+        {
+            throw new NotImplementedException();
+        }
+
+        public Result GetServiceObject(out object serviceObject)
+        {
+            throw new NotImplementedException();
+        }
+    }
+
+    internal class LibHacArpServiceObject : LibHac.Sm.IServiceObject
+    {
+        private SharedRef<LibHacIReader> _serviceObject;
+
+        public LibHacArpServiceObject(ref SharedRef<LibHacIReader> serviceObject)
+        {
+            _serviceObject = SharedRef<LibHacIReader>.CreateCopy(in serviceObject);
+        }
+
+        public void Dispose()
+        {
+            _serviceObject.Destroy();
+        }
+
+        public Result GetServiceObject(ref SharedRef<IDisposable> serviceObject)
+        {
+            serviceObject.SetByCopy(in _serviceObject);
+
+            return Result.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioIn/AudioIn.cs

@@ -0,0 +1,108 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Input;
+using Ryujinx.Audio.Integration;
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Audio.AudioRenderer;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioIn
+{
+    class AudioIn : IAudioIn
+    {
+        private AudioInputSystem _system;
+        private uint _processHandle;
+        private KernelContext _kernelContext;
+
+        public AudioIn(AudioInputSystem system, KernelContext kernelContext, uint processHandle)
+        {
+            _system = system;
+            _kernelContext = kernelContext;
+            _processHandle = processHandle;
+        }
+
+        public ResultCode AppendBuffer(ulong bufferTag, ref AudioUserBuffer buffer)
+        {
+            return (ResultCode)_system.AppendBuffer(bufferTag, ref buffer);
+        }
+
+        public ResultCode AppendUacBuffer(ulong bufferTag, ref AudioUserBuffer buffer, uint handle)
+        {
+            return (ResultCode)_system.AppendUacBuffer(bufferTag, ref buffer, handle);
+        }
+
+        public bool ContainsBuffer(ulong bufferTag)
+        {
+            return _system.ContainsBuffer(bufferTag);
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _system.Dispose();
+
+                _kernelContext.Syscall.CloseHandle((int)_processHandle);
+            }
+        }
+
+        public bool FlushBuffers()
+        {
+            return _system.FlushBuffers();
+        }
+
+        public uint GetBufferCount()
+        {
+            return _system.GetBufferCount();
+        }
+
+        public ResultCode GetReleasedBuffers(Span<ulong> releasedBuffers, out uint releasedCount)
+        {
+            return (ResultCode)_system.GetReleasedBuffers(releasedBuffers, out releasedCount);
+        }
+
+        public AudioDeviceState GetState()
+        {
+            return _system.GetState();
+        }
+
+        public float GetVolume()
+        {
+            return _system.GetVolume();
+        }
+
+        public KEvent RegisterBufferEvent()
+        {
+            IWritableEvent outEvent = _system.RegisterBufferEvent();
+
+            if (outEvent is AudioKernelEvent)
+            {
+                return ((AudioKernelEvent)outEvent).Event;
+            }
+            else
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        public void SetVolume(float volume)
+        {
+            _system.SetVolume(volume);
+        }
+
+        public ResultCode Start()
+        {
+            return (ResultCode)_system.Start();
+        }
+
+        public ResultCode Stop()
+        {
+            return (ResultCode)_system.Stop();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioIn/AudioInServer.cs

@@ -0,0 +1,204 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioIn
+{
+    class AudioInServer : DisposableIpcService
+    {
+        private IAudioIn _impl;
+
+        public AudioInServer(IAudioIn impl)
+        {
+            _impl = impl;
+        }
+
+        [CommandCmif(0)]
+        // GetAudioInState() -> u32 state
+        public ResultCode GetAudioInState(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)_impl.GetState());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // Start()
+        public ResultCode Start(ServiceCtx context)
+        {
+            return _impl.Start();
+        }
+
+        [CommandCmif(2)]
+        // Stop()
+        public ResultCode StopAudioIn(ServiceCtx context)
+        {
+            return _impl.Stop();
+        }
+
+        [CommandCmif(3)]
+        // AppendAudioInBuffer(u64 tag, buffer<nn::audio::AudioInBuffer, 5>)
+        public ResultCode AppendAudioInBuffer(ServiceCtx context)
+        {
+            ulong position = context.Request.SendBuff[0].Position;
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendBuffer(bufferTag, ref data);
+        }
+
+        [CommandCmif(4)]
+        // RegisterBufferEvent() -> handle<copy>
+        public ResultCode RegisterBufferEvent(ServiceCtx context)
+        {
+            KEvent bufferEvent = _impl.RegisterBufferEvent();
+
+            if (context.Process.HandleTable.GenerateHandle(bufferEvent.ReadableEvent, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(5)]
+        // GetReleasedAudioInBuffers() -> (u32 count, buffer<u64, 6> tags)
+        public ResultCode GetReleasedAudioInBuffers(ServiceCtx context)
+        {
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            using (WritableRegion outputRegion = context.Memory.GetWritableRegion((ulong)position, (int)size))
+            {
+                ResultCode result = _impl.GetReleasedBuffers(MemoryMarshal.Cast<byte, ulong>(outputRegion.Memory.Span), out uint releasedCount);
+
+                context.ResponseData.Write(releasedCount);
+
+                return result;
+            }
+        }
+
+        [CommandCmif(6)]
+        // ContainsAudioInBuffer(u64 tag) -> b8
+        public ResultCode ContainsAudioInBuffer(ServiceCtx context)
+        {
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            context.ResponseData.Write(_impl.ContainsBuffer(bufferTag));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(7)] // 3.0.0+
+        // AppendUacInBuffer(u64 tag, handle<copy, unknown>, buffer<nn::audio::AudioInBuffer, 5>)
+        public ResultCode AppendUacInBuffer(ServiceCtx context)
+        {
+            ulong position = context.Request.SendBuff[0].Position;
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+            uint handle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendUacBuffer(bufferTag, ref data, handle);
+        }
+
+        [CommandCmif(8)] // 3.0.0+
+        // AppendAudioInBufferAuto(u64 tag, buffer<nn::audio::AudioInBuffer, 0x21>)
+        public ResultCode AppendAudioInBufferAuto(ServiceCtx context)
+        {
+            (ulong position, _) = context.Request.GetBufferType0x21();
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendBuffer(bufferTag, ref data);
+        }
+
+        [CommandCmif(9)] // 3.0.0+
+        // GetReleasedAudioInBuffersAuto() -> (u32 count, buffer<u64, 0x22> tags)
+        public ResultCode GetReleasedAudioInBuffersAuto(ServiceCtx context)
+        {
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            using (WritableRegion outputRegion = context.Memory.GetWritableRegion(position, (int)size))
+            {
+                ResultCode result = _impl.GetReleasedBuffers(MemoryMarshal.Cast<byte, ulong>(outputRegion.Memory.Span), out uint releasedCount);
+
+                context.ResponseData.Write(releasedCount);
+
+                return result;
+            }
+        }
+
+        [CommandCmif(10)] // 3.0.0+
+        // AppendUacInBufferAuto(u64 tag, handle<copy, event>, buffer<nn::audio::AudioInBuffer, 0x21>)
+        public ResultCode AppendUacInBufferAuto(ServiceCtx context)
+        {
+            (ulong position, _) = context.Request.GetBufferType0x21();
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+            uint handle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendUacBuffer(bufferTag, ref data, handle);
+        }
+
+        [CommandCmif(11)] // 4.0.0+
+        // GetAudioInBufferCount() -> u32
+        public ResultCode GetAudioInBufferCount(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetBufferCount());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)] // 4.0.0+
+        // SetAudioInVolume(s32)
+        public ResultCode SetAudioInVolume(ServiceCtx context)
+        {
+            float volume = context.RequestData.ReadSingle();
+
+            _impl.SetVolume(volume);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(13)] // 4.0.0+
+        // GetAudioInVolume() -> s32
+        public ResultCode GetAudioInVolume(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetVolume());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(14)] // 6.0.0+
+        // FlushAudioInBuffers() -> b8
+        public ResultCode FlushAudioInBuffers(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.FlushBuffers());
+
+            return ResultCode.Success;
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            if (isDisposing)
+            {
+                _impl.Dispose();
+            }
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioIn/IAudioIn.cs

@@ -0,0 +1,34 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioIn
+{
+    interface IAudioIn : IDisposable
+    {
+        AudioDeviceState GetState();
+
+        ResultCode Start();
+
+        ResultCode Stop();
+
+        ResultCode AppendBuffer(ulong bufferTag, ref AudioUserBuffer buffer);
+
+        // NOTE: This is broken by design... not quite sure what it's used for (if anything in production).
+        ResultCode AppendUacBuffer(ulong bufferTag, ref AudioUserBuffer buffer, uint handle);
+
+        KEvent RegisterBufferEvent();
+
+        ResultCode GetReleasedBuffers(Span<ulong> releasedBuffers, out uint releasedCount);
+
+        bool ContainsBuffer(ulong bufferTag);
+
+        uint GetBufferCount();
+
+        bool FlushBuffers();
+
+        void SetVolume(float volume);
+
+        float GetVolume();
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioInManager.cs

@@ -0,0 +1,41 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Input;
+using Ryujinx.HLE.HOS.Services.Audio.AudioIn;
+
+using AudioInManagerImpl = Ryujinx.Audio.Input.AudioInputManager;
+
+namespace Ryujinx.HLE.HOS.Services.Audio
+{
+    class AudioInManager : IAudioInManager
+    {
+        private AudioInManagerImpl _impl;
+
+        public AudioInManager(AudioInManagerImpl impl)
+        {
+            _impl = impl;
+        }
+
+        public string[] ListAudioIns(bool filtered)
+        {
+            return _impl.ListAudioIns(filtered);
+        }
+
+        public ResultCode OpenAudioIn(ServiceCtx context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioIn obj, string inputDeviceName, ref AudioInputConfiguration parameter, ulong appletResourceUserId, uint processHandle)
+        {
+            var memoryManager = context.Process.HandleTable.GetKProcess((int)processHandle).CpuMemory;
+
+            ResultCode result = (ResultCode)_impl.OpenAudioIn(out outputDeviceName, out outputConfiguration, out AudioInputSystem inSystem, memoryManager, inputDeviceName, SampleFormat.PcmInt16, ref parameter, appletResourceUserId, processHandle);
+
+            if (result == ResultCode.Success)
+            {
+                obj = new AudioIn.AudioIn(inSystem, context.Device.System.KernelContext, processHandle);
+            }
+            else
+            {
+                obj = null;
+            }
+
+            return result;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioInManagerServer.cs

@@ -0,0 +1,235 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Services.Audio.AudioIn;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Audio
+{
+    [Service("audin:u")]
+    class AudioInManagerServer : IpcService
+    {
+        private const int AudioInNameSize = 0x100;
+
+        private IAudioInManager _impl;
+
+        public AudioInManagerServer(ServiceCtx context) : this(context, new AudioInManager(context.Device.System.AudioInputManager)) { }
+
+        public AudioInManagerServer(ServiceCtx context, IAudioInManager impl) : base(context.Device.System.AudOutServer)
+        {
+            _impl = impl;
+        }
+
+        [CommandCmif(0)]
+        // ListAudioIns() -> (u32, buffer<bytes, 6>)
+        public ResultCode ListAudioIns(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioIns(false);
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioInNameSize - buffer.Length);
+
+                position += AudioInNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // OpenAudioIn(AudioInInputConfiguration input_config, nn::applet::AppletResourceUserId, pid, handle<copy, process>, buffer<bytes, 5> name)
+        // -> (u32 sample_rate, u32 channel_count, u32 pcm_format, u32, object<nn::audio::detail::IAudioIn>, buffer<bytes, 6> name)
+        public ResultCode OpenAudioIn(ServiceCtx context)
+        {
+            AudioInputConfiguration inputConfiguration = context.RequestData.ReadStruct<AudioInputConfiguration>();
+            ulong appletResourceUserId = context.RequestData.ReadUInt64();
+
+            ulong deviceNameInputPosition = context.Request.SendBuff[0].Position;
+            ulong deviceNameInputSize = context.Request.SendBuff[0].Size;
+
+            ulong deviceNameOutputPosition = context.Request.ReceiveBuff[0].Position;
+            ulong deviceNameOutputSize = context.Request.ReceiveBuff[0].Size;
+
+            uint processHandle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            string inputDeviceName = MemoryHelper.ReadAsciiString(context.Memory, deviceNameInputPosition, (long)deviceNameInputSize);
+
+            ResultCode resultCode = _impl.OpenAudioIn(context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioIn obj, inputDeviceName, ref inputConfiguration, appletResourceUserId, processHandle);
+
+            if (resultCode == ResultCode.Success)
+            {
+                context.ResponseData.WriteStruct(outputConfiguration);
+
+                byte[] outputDeviceNameRaw = Encoding.ASCII.GetBytes(outputDeviceName);
+
+                context.Memory.Write(deviceNameOutputPosition, outputDeviceNameRaw);
+                MemoryHelper.FillWithZeros(context.Memory, deviceNameOutputPosition + (ulong)outputDeviceNameRaw.Length, AudioInNameSize - outputDeviceNameRaw.Length);
+
+                MakeObject(context, new AudioInServer(obj));
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(2)] // 3.0.0+
+        // ListAudioInsAuto() -> (u32, buffer<bytes, 0x22>)
+        public ResultCode ListAudioInsAuto(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioIns(false);
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioInNameSize - buffer.Length);
+
+                position += AudioInNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)] // 3.0.0+
+        // OpenAudioInAuto(AudioInInputConfiguration input_config, nn::applet::AppletResourceUserId, pid, handle<copy, process>, buffer<bytes, 0x21>)
+        // -> (u32 sample_rate, u32 channel_count, u32 pcm_format, u32, object<nn::audio::detail::IAudioIn>, buffer<bytes, 0x22> name)
+        public ResultCode OpenAudioInAuto(ServiceCtx context)
+        {
+            AudioInputConfiguration inputConfiguration = context.RequestData.ReadStruct<AudioInputConfiguration>();
+            ulong appletResourceUserId = context.RequestData.ReadUInt64();
+
+            (ulong deviceNameInputPosition, ulong deviceNameInputSize) = context.Request.GetBufferType0x21();
+            (ulong deviceNameOutputPosition, ulong deviceNameOutputSize) = context.Request.GetBufferType0x22();
+
+            uint processHandle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            string inputDeviceName = MemoryHelper.ReadAsciiString(context.Memory, deviceNameInputPosition, (long)deviceNameInputSize);
+
+            ResultCode resultCode = _impl.OpenAudioIn(context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioIn obj, inputDeviceName, ref inputConfiguration, appletResourceUserId, processHandle);
+
+            if (resultCode == ResultCode.Success)
+            {
+                context.ResponseData.WriteStruct(outputConfiguration);
+
+                byte[] outputDeviceNameRaw = Encoding.ASCII.GetBytes(outputDeviceName);
+
+                context.Memory.Write(deviceNameOutputPosition, outputDeviceNameRaw);
+                MemoryHelper.FillWithZeros(context.Memory, deviceNameOutputPosition + (ulong)outputDeviceNameRaw.Length, AudioInNameSize - outputDeviceNameRaw.Length);
+
+                MakeObject(context, new AudioInServer(obj));
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(4)] // 3.0.0+
+        // ListAudioInsAutoFiltered() -> (u32, buffer<bytes, 0x22>)
+        public ResultCode ListAudioInsAutoFiltered(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioIns(true);
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioInNameSize - buffer.Length);
+
+                position += AudioInNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(5)] // 5.0.0+
+        // OpenAudioInProtocolSpecified(b64 protocol_specified_related, AudioInInputConfiguration input_config, nn::applet::AppletResourceUserId, pid, handle<copy, process>, buffer<bytes, 5> name)
+        // -> (u32 sample_rate, u32 channel_count, u32 pcm_format, u32, object<nn::audio::detail::IAudioIn>, buffer<bytes, 6> name)
+        public ResultCode OpenAudioInProtocolSpecified(ServiceCtx context)
+        {
+            // NOTE: We always assume that only the default device will be plugged (we never report any USB Audio Class type devices).
+            bool protocolSpecifiedRelated = context.RequestData.ReadUInt64() == 1;
+
+            AudioInputConfiguration inputConfiguration = context.RequestData.ReadStruct<AudioInputConfiguration>();
+            ulong appletResourceUserId = context.RequestData.ReadUInt64();
+
+            ulong deviceNameInputPosition = context.Request.SendBuff[0].Position;
+            ulong deviceNameInputSize = context.Request.SendBuff[0].Size;
+
+            ulong deviceNameOutputPosition = context.Request.ReceiveBuff[0].Position;
+            ulong deviceNameOutputSize = context.Request.ReceiveBuff[0].Size;
+
+            uint processHandle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            string inputDeviceName = MemoryHelper.ReadAsciiString(context.Memory, deviceNameInputPosition, (long)deviceNameInputSize);
+
+            ResultCode resultCode = _impl.OpenAudioIn(context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioIn obj, inputDeviceName, ref inputConfiguration, appletResourceUserId, processHandle);
+
+            if (resultCode == ResultCode.Success)
+            {
+                context.ResponseData.WriteStruct(outputConfiguration);
+
+                byte[] outputDeviceNameRaw = Encoding.ASCII.GetBytes(outputDeviceName);
+
+                context.Memory.Write(deviceNameOutputPosition, outputDeviceNameRaw);
+                MemoryHelper.FillWithZeros(context.Memory, deviceNameOutputPosition + (ulong)outputDeviceNameRaw.Length, AudioInNameSize - outputDeviceNameRaw.Length);
+
+                MakeObject(context, new AudioInServer(obj));
+            }
+
+            return resultCode;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioOut/AudioOut.cs

@@ -0,0 +1,108 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Integration;
+using Ryujinx.Audio.Output;
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.HLE.HOS.Services.Audio.AudioRenderer;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioOut
+{
+    class AudioOut : IAudioOut
+    {
+        private AudioOutputSystem _system;
+        private uint _processHandle;
+        private KernelContext _kernelContext;
+
+        public AudioOut(AudioOutputSystem system, KernelContext kernelContext, uint processHandle)
+        {
+            _system = system;
+            _kernelContext = kernelContext;
+            _processHandle = processHandle;
+        }
+
+        public ResultCode AppendBuffer(ulong bufferTag, ref AudioUserBuffer buffer)
+        {
+            return (ResultCode)_system.AppendBuffer(bufferTag, ref buffer);
+        }
+
+        public bool ContainsBuffer(ulong bufferTag)
+        {
+            return _system.ContainsBuffer(bufferTag);
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing)
+            {
+                _system.Dispose();
+
+                _kernelContext.Syscall.CloseHandle((int)_processHandle);
+            }
+        }
+
+        public bool FlushBuffers()
+        {
+            return _system.FlushBuffers();
+        }
+
+        public uint GetBufferCount()
+        {
+            return _system.GetBufferCount();
+        }
+
+        public ulong GetPlayedSampleCount()
+        {
+            return _system.GetPlayedSampleCount();
+        }
+
+        public ResultCode GetReleasedBuffers(Span<ulong> releasedBuffers, out uint releasedCount)
+        {
+            return (ResultCode)_system.GetReleasedBuffer(releasedBuffers, out releasedCount);
+        }
+
+        public AudioDeviceState GetState()
+        {
+            return _system.GetState();
+        }
+
+        public float GetVolume()
+        {
+            return _system.GetVolume();
+        }
+
+        public KEvent RegisterBufferEvent()
+        {
+            IWritableEvent outEvent = _system.RegisterBufferEvent();
+
+            if (outEvent is AudioKernelEvent)
+            {
+                return ((AudioKernelEvent)outEvent).Event;
+            }
+            else
+            {
+                throw new NotImplementedException();
+            }
+        }
+
+        public void SetVolume(float volume)
+        {
+            _system.SetVolume(volume);
+        }
+
+        public ResultCode Start()
+        {
+            return (ResultCode)_system.Start();
+        }
+
+        public ResultCode Stop()
+        {
+            return (ResultCode)_system.Stop();
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioOut/AudioOutServer.cs

@@ -0,0 +1,185 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+using Ryujinx.Memory;
+using System;
+using System.Runtime.InteropServices;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioOut
+{
+    class AudioOutServer : DisposableIpcService
+    {
+        private IAudioOut _impl;
+
+        public AudioOutServer(IAudioOut impl)
+        {
+            _impl = impl;
+        }
+
+        [CommandCmif(0)]
+        // GetAudioOutState() -> u32 state
+        public ResultCode GetAudioOutState(ServiceCtx context)
+        {
+            context.ResponseData.Write((uint)_impl.GetState());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // Start()
+        public ResultCode Start(ServiceCtx context)
+        {
+            return _impl.Start();
+        }
+
+        [CommandCmif(2)]
+        // Stop()
+        public ResultCode Stop(ServiceCtx context)
+        {
+            return _impl.Stop();
+        }
+
+        [CommandCmif(3)]
+        // AppendAudioOutBuffer(u64 bufferTag, buffer<nn::audio::AudioOutBuffer, 5> buffer)
+        public ResultCode AppendAudioOutBuffer(ServiceCtx context)
+        {
+            ulong position = context.Request.SendBuff[0].Position;
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendBuffer(bufferTag, ref data);
+        }
+
+        [CommandCmif(4)]
+        // RegisterBufferEvent() -> handle<copy>
+        public ResultCode RegisterBufferEvent(ServiceCtx context)
+        {
+            KEvent bufferEvent = _impl.RegisterBufferEvent();
+
+            if (context.Process.HandleTable.GenerateHandle(bufferEvent.ReadableEvent, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(5)]
+        // GetReleasedAudioOutBuffers() -> (u32 count, buffer<u64, 6> tags)
+        public ResultCode GetReleasedAudioOutBuffers(ServiceCtx context)
+        {
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            using (WritableRegion outputRegion = context.Memory.GetWritableRegion(position, (int)size))
+            {
+                ResultCode result = _impl.GetReleasedBuffers(MemoryMarshal.Cast<byte, ulong>(outputRegion.Memory.Span), out uint releasedCount);
+
+                context.ResponseData.Write(releasedCount);
+
+                return result;
+            }
+        }
+
+        [CommandCmif(6)]
+        // ContainsAudioOutBuffer(u64 tag) -> b8
+        public ResultCode ContainsAudioOutBuffer(ServiceCtx context)
+        {
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            context.ResponseData.Write(_impl.ContainsBuffer(bufferTag));
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(7)] // 3.0.0+
+        // AppendAudioOutBufferAuto(u64 tag, buffer<nn::audio::AudioOutBuffer, 0x21>)
+        public ResultCode AppendAudioOutBufferAuto(ServiceCtx context)
+        {
+            (ulong position, _) = context.Request.GetBufferType0x21();
+
+            ulong bufferTag = context.RequestData.ReadUInt64();
+
+            AudioUserBuffer data = MemoryHelper.Read<AudioUserBuffer>(context.Memory, position);
+
+            return _impl.AppendBuffer(bufferTag, ref data);
+        }
+
+        [CommandCmif(8)] // 3.0.0+
+        // GetReleasedAudioOutBuffersAuto() -> (u32 count, buffer<u64, 0x22> tags)
+        public ResultCode GetReleasedAudioOutBuffersAuto(ServiceCtx context)
+        {
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            using (WritableRegion outputRegion = context.Memory.GetWritableRegion(position, (int)size))
+            {
+                ResultCode result = _impl.GetReleasedBuffers(MemoryMarshal.Cast<byte, ulong>(outputRegion.Memory.Span), out uint releasedCount);
+
+                context.ResponseData.Write(releasedCount);
+
+                return result;
+            }
+        }
+
+        [CommandCmif(9)] // 4.0.0+
+        // GetAudioOutBufferCount() -> u32
+        public ResultCode GetAudioOutBufferCount(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetBufferCount());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)] // 4.0.0+
+        // GetAudioOutPlayedSampleCount() -> u64
+        public ResultCode GetAudioOutPlayedSampleCount(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetPlayedSampleCount());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)] // 4.0.0+
+        // FlushAudioOutBuffers() -> b8
+        public ResultCode FlushAudioOutBuffers(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.FlushBuffers());
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)] // 6.0.0+
+        // SetAudioOutVolume(s32)
+        public ResultCode SetAudioOutVolume(ServiceCtx context)
+        {
+            float volume = context.RequestData.ReadSingle();
+
+            _impl.SetVolume(volume);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(13)] // 6.0.0+
+        // GetAudioOutVolume() -> s32
+        public ResultCode GetAudioOutVolume(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetVolume());
+
+            return ResultCode.Success;
+        }
+
+        protected override void Dispose(bool isDisposing)
+        {
+            if (isDisposing)
+            {
+                _impl.Dispose();
+            }
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioOut/IAudioOut.cs

@@ -0,0 +1,33 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using System;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioOut
+{
+    interface IAudioOut : IDisposable
+    {
+        AudioDeviceState GetState();
+
+        ResultCode Start();
+
+        ResultCode Stop();
+
+        ResultCode AppendBuffer(ulong bufferTag, ref AudioUserBuffer buffer);
+
+        KEvent RegisterBufferEvent();
+
+        ResultCode GetReleasedBuffers(Span<ulong> releasedBuffers, out uint releasedCount);
+
+        bool ContainsBuffer(ulong bufferTag);
+
+        uint GetBufferCount();
+
+        ulong GetPlayedSampleCount();
+
+        bool FlushBuffers();
+
+        void SetVolume(float volume);
+
+        float GetVolume();
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioOutManager.cs

@@ -0,0 +1,41 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Audio.Output;
+using Ryujinx.HLE.HOS.Services.Audio.AudioOut;
+
+using AudioOutManagerImpl = Ryujinx.Audio.Output.AudioOutputManager;
+
+namespace Ryujinx.HLE.HOS.Services.Audio
+{
+    class AudioOutManager : IAudioOutManager
+    {
+        private AudioOutManagerImpl _impl;
+
+        public AudioOutManager(AudioOutManagerImpl impl)
+        {
+            _impl = impl;
+        }
+
+        public string[] ListAudioOuts()
+        {
+            return _impl.ListAudioOuts();
+        }
+
+        public ResultCode OpenAudioOut(ServiceCtx context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioOut obj, string inputDeviceName, ref AudioInputConfiguration parameter, ulong appletResourceUserId, uint processHandle, float volume)
+        {
+            var memoryManager = context.Process.HandleTable.GetKProcess((int)processHandle).CpuMemory;
+
+            ResultCode result = (ResultCode)_impl.OpenAudioOut(out outputDeviceName, out outputConfiguration, out AudioOutputSystem outSystem, memoryManager, inputDeviceName, SampleFormat.PcmInt16, ref parameter, appletResourceUserId, processHandle, volume);
+
+            if (result == ResultCode.Success)
+            {
+                obj = new AudioOut.AudioOut(outSystem, context.Device.System.KernelContext, processHandle);
+            }
+            else
+            {
+                obj = null;
+            }
+
+            return result;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioOutManagerServer.cs

@@ -0,0 +1,162 @@
+using Ryujinx.Audio.Common;
+using Ryujinx.Common;
+using Ryujinx.Common.Logging;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Services.Audio.AudioOut;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Audio
+{
+    [Service("audout:u")]
+    class AudioOutManagerServer : IpcService
+    {
+        private const int AudioOutNameSize = 0x100;
+
+        private IAudioOutManager _impl;
+
+        public AudioOutManagerServer(ServiceCtx context) : this(context, new AudioOutManager(context.Device.System.AudioOutputManager)) { }
+
+        public AudioOutManagerServer(ServiceCtx context, IAudioOutManager impl) : base(context.Device.System.AudOutServer)
+        {
+            _impl = impl;
+        }
+
+        [CommandCmif(0)]
+        // ListAudioOuts() -> (u32, buffer<bytes, 6>)
+        public ResultCode ListAudioOuts(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioOuts();
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioOutNameSize - buffer.Length);
+
+                position += AudioOutNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // OpenAudioOut(AudioOutInputConfiguration input_config, nn::applet::AppletResourceUserId, pid, handle<copy, process> process_handle, buffer<bytes, 5> name_in)
+        // -> (AudioOutInputConfiguration output_config, object<nn::audio::detail::IAudioOut>, buffer<bytes, 6> name_out)
+        public ResultCode OpenAudioOut(ServiceCtx context)
+        {
+            AudioInputConfiguration inputConfiguration = context.RequestData.ReadStruct<AudioInputConfiguration>();
+            ulong appletResourceUserId = context.RequestData.ReadUInt64();
+
+            ulong deviceNameInputPosition = context.Request.SendBuff[0].Position;
+            ulong deviceNameInputSize = context.Request.SendBuff[0].Size;
+
+            ulong deviceNameOutputPosition = context.Request.ReceiveBuff[0].Position;
+            ulong deviceNameOutputSize = context.Request.ReceiveBuff[0].Size;
+
+            uint processHandle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            string inputDeviceName = MemoryHelper.ReadAsciiString(context.Memory, deviceNameInputPosition, (long)deviceNameInputSize);
+
+            ResultCode resultCode = _impl.OpenAudioOut(context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioOut obj, inputDeviceName, ref inputConfiguration, appletResourceUserId, processHandle, context.Device.Configuration.AudioVolume);
+
+            if (resultCode == ResultCode.Success)
+            {
+                context.ResponseData.WriteStruct(outputConfiguration);
+
+                byte[] outputDeviceNameRaw = Encoding.ASCII.GetBytes(outputDeviceName);
+
+                context.Memory.Write(deviceNameOutputPosition, outputDeviceNameRaw);
+                MemoryHelper.FillWithZeros(context.Memory, deviceNameOutputPosition + (ulong)outputDeviceNameRaw.Length, AudioOutNameSize - outputDeviceNameRaw.Length);
+
+                MakeObject(context, new AudioOutServer(obj));
+            }
+
+            return resultCode;
+        }
+
+        [CommandCmif(2)] // 3.0.0+
+        // ListAudioOutsAuto() -> (u32, buffer<bytes, 0x22>)
+        public ResultCode ListAudioOutsAuto(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioOuts();
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioOutNameSize - buffer.Length);
+
+                position += AudioOutNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(3)] // 3.0.0+
+        // OpenAudioOut(AudioOutInputConfiguration input_config, nn::applet::AppletResourceUserId, pid, handle<copy, process> process_handle, buffer<bytes, 0x21> name_in)
+        // -> (AudioOutInputConfiguration output_config, object<nn::audio::detail::IAudioOut>, buffer<bytes, 0x22> name_out)
+        public ResultCode OpenAudioOutAuto(ServiceCtx context)
+        {
+            AudioInputConfiguration inputConfiguration = context.RequestData.ReadStruct<AudioInputConfiguration>();
+            ulong appletResourceUserId = context.RequestData.ReadUInt64();
+
+            (ulong deviceNameInputPosition, ulong deviceNameInputSize) = context.Request.GetBufferType0x21();
+            (ulong deviceNameOutputPosition, ulong deviceNameOutputSize) = context.Request.GetBufferType0x22();
+
+            uint processHandle = (uint)context.Request.HandleDesc.ToCopy[0];
+
+            string inputDeviceName = MemoryHelper.ReadAsciiString(context.Memory, deviceNameInputPosition, (long)deviceNameInputSize);
+
+            ResultCode resultCode = _impl.OpenAudioOut(context, out string outputDeviceName, out AudioOutputConfiguration outputConfiguration, out IAudioOut obj, inputDeviceName, ref inputConfiguration, appletResourceUserId, processHandle, context.Device.Configuration.AudioVolume);
+
+            if (resultCode == ResultCode.Success)
+            {
+                context.ResponseData.WriteStruct(outputConfiguration);
+
+                byte[] outputDeviceNameRaw = Encoding.ASCII.GetBytes(outputDeviceName);
+
+                context.Memory.Write(deviceNameOutputPosition, outputDeviceNameRaw);
+                MemoryHelper.FillWithZeros(context.Memory, deviceNameOutputPosition + (ulong)outputDeviceNameRaw.Length, AudioOutNameSize - outputDeviceNameRaw.Length);
+
+                MakeObject(context, new AudioOutServer(obj));
+            }
+
+            return resultCode;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioRenderer/AudioDevice.cs

@@ -0,0 +1,172 @@
+using Ryujinx.Audio.Renderer.Device;
+using Ryujinx.Audio.Renderer.Server;
+using Ryujinx.HLE.HOS.Kernel;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioRenderer
+{
+    class AudioDevice : IAudioDevice
+    {
+        private VirtualDeviceSession[] _sessions;
+        private ulong _appletResourceId;
+        private int _revision;
+        private bool _isUsbDeviceSupported;
+
+        private VirtualDeviceSessionRegistry _registry;
+        private KEvent _systemEvent;
+
+        public AudioDevice(VirtualDeviceSessionRegistry registry, KernelContext context, ulong appletResourceId, int revision)
+        {
+            _registry = registry;
+            _appletResourceId = appletResourceId;
+            _revision = revision;
+
+            BehaviourContext behaviourContext = new BehaviourContext();
+            behaviourContext.SetUserRevision(revision);
+
+            _isUsbDeviceSupported = behaviourContext.IsAudioUsbDeviceOutputSupported();
+            _sessions = _registry.GetSessionByAppletResourceId(appletResourceId);
+
+            // TODO: support the 3 different events correctly when we will have hot plugable audio devices.
+            _systemEvent = new KEvent(context);
+            _systemEvent.ReadableEvent.Signal();
+        }
+
+        private bool TryGetDeviceByName(out VirtualDeviceSession result, string name, bool ignoreRevLimitation = false)
+        {
+            result = null;
+
+            foreach (VirtualDeviceSession session in _sessions)
+            {
+                if (session.Device.Name.Equals(name))
+                {
+                    if (!ignoreRevLimitation && !_isUsbDeviceSupported && session.Device.IsUsbDevice())
+                    {
+                        return false;
+                    }
+
+                    result = session;
+
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public string GetActiveAudioDeviceName()
+        {
+            VirtualDevice device = _registry.ActiveDevice;
+
+            if (!_isUsbDeviceSupported && device.IsUsbDevice())
+            {
+                device = _registry.DefaultDevice;
+            }
+
+            return device.Name;
+        }
+
+        public uint GetActiveChannelCount()
+        {
+            VirtualDevice device = _registry.ActiveDevice;
+
+            if (!_isUsbDeviceSupported && device.IsUsbDevice())
+            {
+                device = _registry.DefaultDevice;
+            }
+
+            return device.ChannelCount;
+        }
+
+        public ResultCode GetAudioDeviceOutputVolume(string name, out float volume)
+        {
+            if (TryGetDeviceByName(out VirtualDeviceSession result, name))
+            {
+                volume = result.Volume;
+            }
+            else
+            {
+                volume = 0.0f;
+            }
+
+            return ResultCode.Success;
+        }
+
+        public ResultCode SetAudioDeviceOutputVolume(string name, float volume)
+        {
+            if (TryGetDeviceByName(out VirtualDeviceSession result, name, true))
+            {
+                if (!_isUsbDeviceSupported && result.Device.IsUsbDevice())
+                {
+                    result = _sessions[0];
+                }
+
+                result.Volume = volume;
+            }
+
+            return ResultCode.Success;
+        }
+
+        public string GetActiveAudioOutputDeviceName()
+        {
+            return _registry.ActiveDevice.GetOutputDeviceName();
+        }
+
+        public string[] ListAudioDeviceName()
+        {
+            int deviceCount = _sessions.Length;
+
+            if (!_isUsbDeviceSupported)
+            {
+                deviceCount--;
+            }
+
+            string[] result = new string[deviceCount];
+
+            int i = 0;
+
+            foreach (VirtualDeviceSession session in _sessions)
+            {
+                if (!_isUsbDeviceSupported && session.Device.IsUsbDevice())
+                {
+                    continue;
+                }
+
+                result[i] = session.Device.Name;
+
+                i++;
+            }
+
+            return result;
+        }
+
+        public string[] ListAudioOutputDeviceName()
+        {
+            int deviceCount = _sessions.Length;
+
+            string[] result = new string[deviceCount];
+
+            for (int i = 0; i < deviceCount; i++)
+            {
+                result[i] = _sessions[i].Device.GetOutputDeviceName();
+            }
+
+            return result;
+        }
+
+        public KEvent QueryAudioDeviceInputEvent()
+        {
+            return _systemEvent;
+        }
+
+        public KEvent QueryAudioDeviceOutputEvent()
+        {
+            return _systemEvent;
+        }
+
+        public KEvent QueryAudioDeviceSystemEvent()
+        {
+            return _systemEvent;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioRenderer/AudioDeviceServer.cs

@@ -0,0 +1,320 @@
+using Ryujinx.Common.Logging;
+using Ryujinx.Cpu;
+using Ryujinx.HLE.HOS.Ipc;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+using Ryujinx.Horizon.Common;
+using System;
+using System.Text;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioRenderer
+{
+    class AudioDeviceServer : IpcService
+    {
+        private const int AudioDeviceNameSize = 0x100;
+
+        private IAudioDevice _impl;
+
+        public AudioDeviceServer(IAudioDevice impl)
+        {
+            _impl = impl;
+        }
+
+        [CommandCmif(0)]
+        // ListAudioDeviceName() -> (u32, buffer<bytes, 6>)
+        public ResultCode ListAudioDeviceName(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioDeviceName();
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioDeviceNameSize - buffer.Length);
+
+                position += AudioDeviceNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(1)]
+        // SetAudioDeviceOutputVolume(f32 volume, buffer<bytes, 5> name)
+        public ResultCode SetAudioDeviceOutputVolume(ServiceCtx context)
+        {
+            float volume = context.RequestData.ReadSingle();
+
+            ulong position = context.Request.SendBuff[0].Position;
+            ulong size = context.Request.SendBuff[0].Size;
+
+            string deviceName = MemoryHelper.ReadAsciiString(context.Memory, position, (long)size);
+
+            return _impl.SetAudioDeviceOutputVolume(deviceName, volume);
+        }
+
+        [CommandCmif(2)]
+        // GetAudioDeviceOutputVolume(buffer<bytes, 5> name) -> f32 volume
+        public ResultCode GetAudioDeviceOutputVolume(ServiceCtx context)
+        {
+            ulong position = context.Request.SendBuff[0].Position;
+            ulong size = context.Request.SendBuff[0].Size;
+
+            string deviceName = MemoryHelper.ReadAsciiString(context.Memory, position, (long)size);
+
+            ResultCode result = _impl.GetAudioDeviceOutputVolume(deviceName, out float volume);
+
+            if (result == ResultCode.Success)
+            {
+                context.ResponseData.Write(volume);
+            }
+
+            return result;
+        }
+
+        [CommandCmif(3)]
+        // GetActiveAudioDeviceName() -> buffer<bytes, 6>
+        public ResultCode GetActiveAudioDeviceName(ServiceCtx context)
+        {
+            string name = _impl.GetActiveAudioDeviceName();
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            byte[] deviceNameBuffer = Encoding.ASCII.GetBytes(name + "\0");
+
+            if ((ulong)deviceNameBuffer.Length <= size)
+            {
+                context.Memory.Write(position, deviceNameBuffer);
+            }
+            else
+            {
+                Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(4)]
+        // QueryAudioDeviceSystemEvent() -> handle<copy, event>
+        public ResultCode QueryAudioDeviceSystemEvent(ServiceCtx context)
+        {
+            KEvent deviceSystemEvent = _impl.QueryAudioDeviceSystemEvent();
+
+            if (context.Process.HandleTable.GenerateHandle(deviceSystemEvent.ReadableEvent, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAudio);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(5)]
+        // GetActiveChannelCount() -> u32
+        public ResultCode GetActiveChannelCount(ServiceCtx context)
+        {
+            context.ResponseData.Write(_impl.GetActiveChannelCount());
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAudio);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(6)] // 3.0.0+
+        // ListAudioDeviceNameAuto() -> (u32, buffer<bytes, 0x22>)
+        public ResultCode ListAudioDeviceNameAuto(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioDeviceName();
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioDeviceNameSize - buffer.Length);
+
+                position += AudioDeviceNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(7)] // 3.0.0+
+        // SetAudioDeviceOutputVolumeAuto(f32 volume, buffer<bytes, 0x21> name)
+        public ResultCode SetAudioDeviceOutputVolumeAuto(ServiceCtx context)
+        {
+            float volume = context.RequestData.ReadSingle();
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x21();
+
+            string deviceName = MemoryHelper.ReadAsciiString(context.Memory, position, (long)size);
+
+            return _impl.SetAudioDeviceOutputVolume(deviceName, volume);
+        }
+
+        [CommandCmif(8)] // 3.0.0+
+        // GetAudioDeviceOutputVolumeAuto(buffer<bytes, 0x21> name) -> f32
+        public ResultCode GetAudioDeviceOutputVolumeAuto(ServiceCtx context)
+        {
+            (ulong position, ulong size) = context.Request.GetBufferType0x21();
+
+            string deviceName = MemoryHelper.ReadAsciiString(context.Memory, position, (long)size);
+
+            ResultCode result = _impl.GetAudioDeviceOutputVolume(deviceName, out float volume);
+
+            if (result == ResultCode.Success)
+            {
+                context.ResponseData.Write(volume);
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(10)] // 3.0.0+
+        // GetActiveAudioDeviceNameAuto() -> buffer<bytes, 0x22>
+        public ResultCode GetActiveAudioDeviceNameAuto(ServiceCtx context)
+        {
+            string name = _impl.GetActiveAudioDeviceName();
+
+            (ulong position, ulong size) = context.Request.GetBufferType0x22();
+
+            byte[] deviceNameBuffer = Encoding.UTF8.GetBytes(name + '\0');
+
+            if ((ulong)deviceNameBuffer.Length <= size)
+            {
+                context.Memory.Write(position, deviceNameBuffer);
+            }
+            else
+            {
+                Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(11)] // 3.0.0+
+        // QueryAudioDeviceInputEvent() -> handle<copy, event>
+        public ResultCode QueryAudioDeviceInputEvent(ServiceCtx context)
+        {
+            KEvent deviceInputEvent = _impl.QueryAudioDeviceInputEvent();
+
+            if (context.Process.HandleTable.GenerateHandle(deviceInputEvent.ReadableEvent, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAudio);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(12)] // 3.0.0+
+        // QueryAudioDeviceOutputEvent() -> handle<copy, event>
+        public ResultCode QueryAudioDeviceOutputEvent(ServiceCtx context)
+        {
+            KEvent deviceOutputEvent = _impl.QueryAudioDeviceOutputEvent();
+
+            if (context.Process.HandleTable.GenerateHandle(deviceOutputEvent.ReadableEvent, out int handle) != Result.Success)
+            {
+                throw new InvalidOperationException("Out of handles!");
+            }
+
+            context.Response.HandleDesc = IpcHandleDesc.MakeCopy(handle);
+
+            Logger.Stub?.PrintStub(LogClass.ServiceAudio);
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(13)] // 13.0.0+
+        // GetActiveAudioOutputDeviceName() -> buffer<bytes, 6>
+        public ResultCode GetActiveAudioOutputDeviceName(ServiceCtx context)
+        {
+            string name = _impl.GetActiveAudioOutputDeviceName();
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            byte[] deviceNameBuffer = Encoding.ASCII.GetBytes(name + "\0");
+
+            if ((ulong)deviceNameBuffer.Length <= size)
+            {
+                context.Memory.Write(position, deviceNameBuffer);
+            }
+            else
+            {
+                Logger.Error?.Print(LogClass.ServiceAudio, $"Output buffer size {size} too small!");
+            }
+
+            return ResultCode.Success;
+        }
+
+        [CommandCmif(14)] // 13.0.0+
+        // ListAudioOutputDeviceName() -> (u32, buffer<bytes, 6>)
+        public ResultCode ListAudioOutputDeviceName(ServiceCtx context)
+        {
+            string[] deviceNames = _impl.ListAudioOutputDeviceName();
+
+            ulong position = context.Request.ReceiveBuff[0].Position;
+            ulong size = context.Request.ReceiveBuff[0].Size;
+
+            ulong basePosition = position;
+
+            int count = 0;
+
+            foreach (string name in deviceNames)
+            {
+                byte[] buffer = Encoding.ASCII.GetBytes(name);
+
+                if ((position - basePosition) + (ulong)buffer.Length > size)
+                {
+                    break;
+                }
+
+                context.Memory.Write(position, buffer);
+                MemoryHelper.FillWithZeros(context.Memory, position + (ulong)buffer.Length, AudioDeviceNameSize - buffer.Length);
+
+                position += AudioDeviceNameSize;
+                count++;
+            }
+
+            context.ResponseData.Write(count);
+
+            return ResultCode.Success;
+        }
+    }
+}

src/Ryujinx.HLE/HOS/Services/Audio/AudioRenderer/AudioKernelEvent.cs

@@ -0,0 +1,25 @@
+using Ryujinx.Audio.Integration;
+using Ryujinx.HLE.HOS.Kernel.Threading;
+
+namespace Ryujinx.HLE.HOS.Services.Audio.AudioRenderer
+{
+    class AudioKernelEvent : IWritableEvent
+    {
+        public KEvent Event { get; }
+
+        public AudioKernelEvent(KEvent evnt)
+        {
+            Event = evnt;
+        }
+
+        public void Clear()
+        {
+            Event.WritableEvent.Clear();
+        }
+
+        public void Signal()
+        {
+            Event.WritableEvent.Signal();
+        }
+    }
+}