src/Ryujinx.Input.SDL2/SDL2GamepadDriver.cs

@@ -1,3 +1,4 @@
+using Ryujinx.Common.Logging;
 using Ryujinx.SDL2.Common;
 using System;
 using System.Collections.Generic;
@@ -36,6 +37,7 @@ namespace Ryujinx.Input.SDL2
             SDL2Driver.Instance.Initialize();
             SDL2Driver.Instance.OnJoyStickConnected += HandleJoyStickConnected;
             SDL2Driver.Instance.OnJoystickDisconnected += HandleJoyStickDisconnected;
+            SDL2Driver.Instance.OnJoyBatteryUpdated += HandleJoyBatteryUpdated;
 
             // Add already connected gamepads
             int numJoysticks = SDL_NumJoysticks();
@@ -83,19 +85,30 @@ namespace Ryujinx.Input.SDL2
 
         private void HandleJoyStickDisconnected(int joystickInstanceId)
         {
+            bool joyConPairDisconnected = false;
             if (!_gamepadsInstanceIdsMapping.Remove(joystickInstanceId, out string id))
                 return;
 
             lock (_lock)
             {
                 _gamepadsIds.Remove(id);
+                if (!SDL2JoyConPair.IsCombinable(_gamepadsIds))
+                {
+                    _gamepadsIds.Remove(SDL2JoyConPair.Id);
+                    joyConPairDisconnected = true;
+                }
             }
 
             OnGamepadDisconnected?.Invoke(id);
+            if (joyConPairDisconnected)
+            {
+                OnGamepadDisconnected?.Invoke(SDL2JoyConPair.Id);
+            }
         }
 
         private void HandleJoyStickConnected(int joystickDeviceId, int joystickInstanceId)
         {
+            bool joyConPairConnected = false;
             if (SDL_IsGameController(joystickDeviceId) == SDL_bool.SDL_TRUE)
             {
                 if (_gamepadsInstanceIdsMapping.ContainsKey(joystickInstanceId))
@@ -120,13 +133,29 @@ namespace Ryujinx.Input.SDL2
                             _gamepadsIds.Insert(joystickDeviceId, id);
                         else
                             _gamepadsIds.Add(id);
+                        if (SDL2JoyConPair.IsCombinable(_gamepadsIds))
+                        {
+                            _gamepadsIds.Remove(SDL2JoyConPair.Id);
+                            _gamepadsIds.Add(SDL2JoyConPair.Id);
+                            joyConPairConnected = true;
+                        }
                     }
 
                     OnGamepadConnected?.Invoke(id);
+                    if (joyConPairConnected)
+                    {
+                        OnGamepadConnected?.Invoke(SDL2JoyConPair.Id);
+                    }
                 }
             }
         }
 
+        private void HandleJoyBatteryUpdated(int joystickDeviceId, SDL_JoystickPowerLevel powerLevel)
+        {
+            Logger.Info?.Print(LogClass.Hid,
+                $"{SDL_GameControllerNameForIndex(joystickDeviceId)} power level: {powerLevel}");
+        }
+
         protected virtual void Dispose(bool disposing)
         {
             if (disposing)
@@ -157,6 +186,14 @@ namespace Ryujinx.Input.SDL2
 
         public IGamepad GetGamepad(string id)
         {
+            if (id == SDL2JoyConPair.Id)
+            {
+                lock (_lock)
+                {
+                    return SDL2JoyConPair.GetGamepad(_gamepadsIds);
+                }
+            }
+
             int joystickIndex = GetJoystickIndexByGamepadId(id);
 
             if (joystickIndex == -1)
@@ -165,12 +202,16 @@ namespace Ryujinx.Input.SDL2
             }
 
             nint gamepadHandle = SDL_GameControllerOpen(joystickIndex);
-
             if (gamepadHandle == nint.Zero)
             {
                 return null;
             }
 
+            if (SDL_GameControllerName(gamepadHandle).StartsWith(SDL2JoyCon.Prefix))
+            {
+                return new SDL2JoyCon(gamepadHandle, id);    
+            }
+
             return new SDL2Gamepad(gamepadHandle, id);
         }
 

src/Ryujinx.Input.SDL2/SDL2JoyCon.cs

@@ -0,0 +1,413 @@
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Common.Configuration.Hid.Controller;
+using Ryujinx.Common.Logging;
+using System;
+using System.Collections.Generic;
+using System.Numerics;
+using System.Threading;
+using static SDL2.SDL;
+
+namespace Ryujinx.Input.SDL2
+{
+    internal class SDL2JoyCon : IGamepad
+    {
+        private bool HasConfiguration => _configuration != null;
+
+        private readonly record struct ButtonMappingEntry(GamepadButtonInputId To, GamepadButtonInputId From)
+        {
+            public bool IsValid => To is not GamepadButtonInputId.Unbound && From is not GamepadButtonInputId.Unbound;
+        }
+
+        private StandardControllerInputConfig _configuration;
+
+        private readonly Dictionary<GamepadButtonInputId,SDL_GameControllerButton> _leftButtonsDriverMapping = new()
+        {
+            { GamepadButtonInputId.LeftStick , SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_LEFTSTICK },
+             {GamepadButtonInputId.DpadUp ,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_Y},
+             {GamepadButtonInputId.DpadDown ,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_A},
+             {GamepadButtonInputId.DpadLeft ,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_B},
+             {GamepadButtonInputId.DpadRight ,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_X},
+             {GamepadButtonInputId.Minus ,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_START},
+             {GamepadButtonInputId.LeftShoulder,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_PADDLE2},
+             {GamepadButtonInputId.LeftTrigger,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_PADDLE4},
+             {GamepadButtonInputId.SingleRightTrigger0,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+             {GamepadButtonInputId.SingleLeftTrigger0,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_LEFTSHOULDER},
+        };
+        private readonly Dictionary<GamepadButtonInputId,SDL_GameControllerButton> _rightButtonsDriverMapping = new()
+        {
+             {GamepadButtonInputId.RightStick,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_LEFTSTICK},
+             {GamepadButtonInputId.A,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_B},
+             {GamepadButtonInputId.B,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_Y},
+             {GamepadButtonInputId.X,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_A},
+             {GamepadButtonInputId.Y,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_X},
+             {GamepadButtonInputId.Plus,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_START},
+             {GamepadButtonInputId.RightShoulder,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_PADDLE1},
+             {GamepadButtonInputId.RightTrigger,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_PADDLE3},
+             {GamepadButtonInputId.SingleRightTrigger1,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_RIGHTSHOULDER},
+             {GamepadButtonInputId.SingleLeftTrigger1,SDL_GameControllerButton.SDL_CONTROLLER_BUTTON_LEFTSHOULDER}
+        };
+
+        private readonly Dictionary<GamepadButtonInputId, SDL_GameControllerButton> _buttonsDriverMapping;
+        private readonly Lock _userMappingLock = new();
+
+        private readonly List<ButtonMappingEntry> _buttonsUserMapping;
+
+        private readonly StickInputId[] _stickUserMapping = new StickInputId[(int)StickInputId.Count]
+        {
+            StickInputId.Unbound, StickInputId.Left, StickInputId.Right,
+        };
+
+        public GamepadFeaturesFlag Features { get; }
+
+        private nint _gamepadHandle;
+
+        private enum JoyConType
+        {
+            Left, Right
+        }
+
+        public const string Prefix = "Nintendo Switch Joy-Con";
+        public const string LeftName = "Nintendo Switch Joy-Con (L)";
+        public const string RightName = "Nintendo Switch Joy-Con (R)";
+
+        private readonly JoyConType _joyConType;
+
+        public SDL2JoyCon(nint gamepadHandle, string driverId)
+        {
+            _gamepadHandle = gamepadHandle;
+            _buttonsUserMapping = new List<ButtonMappingEntry>(10);
+
+            Name = SDL_GameControllerName(_gamepadHandle);
+            Id = driverId;
+            Features = GetFeaturesFlag();
+
+            // Enable motion tracking
+            if (Features.HasFlag(GamepadFeaturesFlag.Motion))
+            {
+                if (SDL_GameControllerSetSensorEnabled(_gamepadHandle, SDL_SensorType.SDL_SENSOR_ACCEL,
+                        SDL_bool.SDL_TRUE) != 0)
+                {
+                    Logger.Error?.Print(LogClass.Hid,
+                        $"Could not enable data reporting for SensorType {SDL_SensorType.SDL_SENSOR_ACCEL}.");
+                }
+
+                if (SDL_GameControllerSetSensorEnabled(_gamepadHandle, SDL_SensorType.SDL_SENSOR_GYRO,
+                        SDL_bool.SDL_TRUE) != 0)
+                {
+                    Logger.Error?.Print(LogClass.Hid,
+                        $"Could not enable data reporting for SensorType {SDL_SensorType.SDL_SENSOR_GYRO}.");
+                }
+            }
+
+            switch (Name)
+            {
+                case LeftName:
+                    {
+                        _buttonsDriverMapping = _leftButtonsDriverMapping;
+                        _joyConType = JoyConType.Left;
+                        break;
+                    }
+                case RightName:
+                    {
+                        _buttonsDriverMapping = _rightButtonsDriverMapping;
+                        _joyConType = JoyConType.Right;
+                        break;
+                    }
+            }
+        }
+
+        private GamepadFeaturesFlag GetFeaturesFlag()
+        {
+            GamepadFeaturesFlag result = GamepadFeaturesFlag.None;
+
+            if (SDL_GameControllerHasSensor(_gamepadHandle, SDL_SensorType.SDL_SENSOR_ACCEL) == SDL_bool.SDL_TRUE &&
+                SDL_GameControllerHasSensor(_gamepadHandle, SDL_SensorType.SDL_SENSOR_GYRO) == SDL_bool.SDL_TRUE)
+            {
+                result |= GamepadFeaturesFlag.Motion;
+            }
+
+            int error = SDL_GameControllerRumble(_gamepadHandle, 0, 0, 100);
+
+            if (error == 0)
+            {
+                result |= GamepadFeaturesFlag.Rumble;
+            }
+
+            return result;
+        }
+
+        public string Id { get; }
+        public string Name { get; }
+        public bool IsConnected => SDL_GameControllerGetAttached(_gamepadHandle) == SDL_bool.SDL_TRUE;
+
+        protected virtual void Dispose(bool disposing)
+        {
+            if (disposing && _gamepadHandle != nint.Zero)
+            {
+                SDL_GameControllerClose(_gamepadHandle);
+
+                _gamepadHandle = nint.Zero;
+            }
+        }
+
+        public void Dispose()
+        {
+            Dispose(true);
+        }
+
+
+        public void SetTriggerThreshold(float triggerThreshold)
+        {
+
+        }
+
+        public void Rumble(float lowFrequency, float highFrequency, uint durationMs)
+        {
+            if (!Features.HasFlag(GamepadFeaturesFlag.Rumble))
+                return;
+
+            ushort lowFrequencyRaw = (ushort)(lowFrequency * ushort.MaxValue);
+            ushort highFrequencyRaw = (ushort)(highFrequency * ushort.MaxValue);
+
+            if (durationMs == uint.MaxValue)
+            {
+                if (SDL_GameControllerRumble(_gamepadHandle, lowFrequencyRaw, highFrequencyRaw, SDL_HAPTIC_INFINITY) !=
+                    0)
+                    Logger.Error?.Print(LogClass.Hid, "Rumble is not supported on this game controller.");
+            }
+            else if (durationMs > SDL_HAPTIC_INFINITY)
+            {
+                Logger.Error?.Print(LogClass.Hid, $"Unsupported rumble duration {durationMs}");
+            }
+            else
+            {
+                if (SDL_GameControllerRumble(_gamepadHandle, lowFrequencyRaw, highFrequencyRaw, durationMs) != 0)
+                    Logger.Error?.Print(LogClass.Hid, "Rumble is not supported on this game controller.");
+            }
+        }
+
+        public Vector3 GetMotionData(MotionInputId inputId)
+        {
+            SDL_SensorType sensorType = inputId switch
+            {
+                MotionInputId.Accelerometer => SDL_SensorType.SDL_SENSOR_ACCEL,
+                MotionInputId.Gyroscope => SDL_SensorType.SDL_SENSOR_GYRO,
+                _ => SDL_SensorType.SDL_SENSOR_INVALID
+            };
+
+            if (!Features.HasFlag(GamepadFeaturesFlag.Motion) || sensorType is SDL_SensorType.SDL_SENSOR_INVALID)
+                return Vector3.Zero;
+
+            const int ElementCount = 3;
+
+            unsafe
+            {
+                float* values = stackalloc float[ElementCount];
+
+                int result = SDL_GameControllerGetSensorData(_gamepadHandle, sensorType, (nint)values, ElementCount);
+
+                if (result != 0)
+                    return Vector3.Zero;
+
+                Vector3 value = _joyConType switch
+                {
+                    JoyConType.Left => new Vector3(-values[2], values[1], values[0]),
+                    JoyConType.Right => new Vector3(values[2], values[1], -values[0])
+                };
+
+                return inputId switch
+                {
+                    MotionInputId.Gyroscope => RadToDegree(value),
+                    MotionInputId.Accelerometer => GsToMs2(value),
+                    _ => value
+                };
+            }
+        }
+
+        private static Vector3 RadToDegree(Vector3 rad) => rad * (180 / MathF.PI);
+
+        private static Vector3 GsToMs2(Vector3 gs) => gs / SDL_STANDARD_GRAVITY;
+
+        public void SetConfiguration(InputConfig configuration)
+        {
+            lock (_userMappingLock)
+            {
+                _configuration = (StandardControllerInputConfig)configuration;
+
+                _buttonsUserMapping.Clear();
+
+                // First update sticks
+                _stickUserMapping[(int)StickInputId.Left] = (StickInputId)_configuration.LeftJoyconStick.Joystick;
+                _stickUserMapping[(int)StickInputId.Right] = (StickInputId)_configuration.RightJoyconStick.Joystick;
+
+
+                switch (_joyConType)
+                {
+                    case JoyConType.Left:
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.LeftStick, (GamepadButtonInputId)_configuration.LeftJoyconStick.StickButton));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.DpadUp, (GamepadButtonInputId)_configuration.LeftJoycon.DpadUp));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.DpadDown, (GamepadButtonInputId)_configuration.LeftJoycon.DpadDown));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.DpadLeft, (GamepadButtonInputId)_configuration.LeftJoycon.DpadLeft));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.DpadRight, (GamepadButtonInputId)_configuration.LeftJoycon.DpadRight));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.Minus, (GamepadButtonInputId)_configuration.LeftJoycon.ButtonMinus));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.LeftShoulder, (GamepadButtonInputId)_configuration.LeftJoycon.ButtonL));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.LeftTrigger, (GamepadButtonInputId)_configuration.LeftJoycon.ButtonZl));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.SingleRightTrigger0, (GamepadButtonInputId)_configuration.LeftJoycon.ButtonSr));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.SingleLeftTrigger0, (GamepadButtonInputId)_configuration.LeftJoycon.ButtonSl));
+                        break;
+                    case JoyConType.Right:
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.RightStick, (GamepadButtonInputId)_configuration.RightJoyconStick.StickButton));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.A, (GamepadButtonInputId)_configuration.RightJoycon.ButtonA));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.B, (GamepadButtonInputId)_configuration.RightJoycon.ButtonB));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.X, (GamepadButtonInputId)_configuration.RightJoycon.ButtonX));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.Y, (GamepadButtonInputId)_configuration.RightJoycon.ButtonY));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.Plus, (GamepadButtonInputId)_configuration.RightJoycon.ButtonPlus));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.RightShoulder, (GamepadButtonInputId)_configuration.RightJoycon.ButtonR));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.RightTrigger, (GamepadButtonInputId)_configuration.RightJoycon.ButtonZr));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.SingleRightTrigger1, (GamepadButtonInputId)_configuration.RightJoycon.ButtonSr));
+                        _buttonsUserMapping.Add(new ButtonMappingEntry(GamepadButtonInputId.SingleLeftTrigger1, (GamepadButtonInputId)_configuration.RightJoycon.ButtonSl));
+                        break;
+                    default:
+                        throw new ArgumentOutOfRangeException();
+                }
+                
+                SetTriggerThreshold(_configuration.TriggerThreshold);
+            }
+        }
+
+        public void SetLed(uint packedRgb)
+        {
+        }
+
+        public GamepadStateSnapshot GetStateSnapshot()
+        {
+            return IGamepad.GetStateSnapshot(this);
+        }
+
+        public GamepadStateSnapshot GetMappedStateSnapshot()
+        {
+            GamepadStateSnapshot rawState = GetStateSnapshot();
+            GamepadStateSnapshot result = default;
+
+            lock (_userMappingLock)
+            {
+                if (_buttonsUserMapping.Count == 0)
+                    return rawState;
+
+
+                // ReSharper disable once ForeachCanBePartlyConvertedToQueryUsingAnotherGetEnumerator
+                foreach (ButtonMappingEntry entry in _buttonsUserMapping)
+                {
+                    if (!entry.IsValid)
+                        continue;
+
+                    // Do not touch state of button already pressed
+                    if (!result.IsPressed(entry.To))
+                    {
+                        result.SetPressed(entry.To, rawState.IsPressed(entry.From));
+                    }
+                }
+
+                (float leftStickX, float leftStickY) = rawState.GetStick(_stickUserMapping[(int)StickInputId.Left]);
+                (float rightStickX, float rightStickY) = rawState.GetStick(_stickUserMapping[(int)StickInputId.Right]);
+
+                result.SetStick(StickInputId.Left, leftStickX, leftStickY);
+                result.SetStick(StickInputId.Right, rightStickX, rightStickY);
+            }
+
+            return result;
+        }
+
+
+        private static float ConvertRawStickValue(short value)
+        {
+            const float ConvertRate = 1.0f / (short.MaxValue + 0.5f);
+
+            return value * ConvertRate;
+        }
+
+        private JoyconConfigControllerStick<GamepadInputId, Common.Configuration.Hid.Controller.StickInputId>
+            GetLogicalJoyStickConfig(StickInputId inputId)
+        {
+            switch (inputId)
+            {
+                case StickInputId.Left:
+                    if (_configuration.RightJoyconStick.Joystick ==
+                        Common.Configuration.Hid.Controller.StickInputId.Left)
+                        return _configuration.RightJoyconStick;
+                    else
+                        return _configuration.LeftJoyconStick;
+                case StickInputId.Right:
+                    if (_configuration.LeftJoyconStick.Joystick ==
+                        Common.Configuration.Hid.Controller.StickInputId.Right)
+                        return _configuration.LeftJoyconStick;
+                    else
+                        return _configuration.RightJoyconStick;
+            }
+
+            return null;
+        }
+
+
+        public (float, float) GetStick(StickInputId inputId)
+        {
+            if (inputId == StickInputId.Unbound)
+                return (0.0f, 0.0f);
+
+            if (inputId == StickInputId.Left && _joyConType == JoyConType.Right || inputId == StickInputId.Right && _joyConType == JoyConType.Left)
+            {
+                return (0.0f, 0.0f);
+            }
+            
+            (short stickX, short stickY) = GetStickXY();
+
+            float resultX = ConvertRawStickValue(stickX);
+            float resultY = -ConvertRawStickValue(stickY);
+
+            if (HasConfiguration)
+            {
+                var joyconStickConfig = GetLogicalJoyStickConfig(inputId);
+
+                if (joyconStickConfig != null)
+                {
+                    if (joyconStickConfig.InvertStickX)
+                        resultX = -resultX;
+
+                    if (joyconStickConfig.InvertStickY)
+                        resultY = -resultY;
+
+                    if (joyconStickConfig.Rotate90CW)
+                    {
+                        float temp = resultX;
+                        resultX = resultY;
+                        resultY = -temp;
+                    }
+                }
+            }
+
+            return inputId switch
+            {
+                StickInputId.Left when _joyConType == JoyConType.Left => (resultY, -resultX),
+                StickInputId.Right when _joyConType == JoyConType.Right => (-resultY, resultX),
+                _ => (0.0f, 0.0f)
+            };
+        }
+
+        private (short, short) GetStickXY()
+        {
+            return (
+                SDL_GameControllerGetAxis(_gamepadHandle, SDL_GameControllerAxis.SDL_CONTROLLER_AXIS_LEFTX),
+                SDL_GameControllerGetAxis(_gamepadHandle, SDL_GameControllerAxis.SDL_CONTROLLER_AXIS_LEFTY));
+        }
+        
+        public bool IsPressed(GamepadButtonInputId inputId)
+        {
+            if (!_buttonsDriverMapping.TryGetValue(inputId, out var button))
+            {
+                return false;
+            }
+
+            return SDL_GameControllerGetButton(_gamepadHandle, button) == 1;
+        }
+    }
+}

src/Ryujinx.Input.SDL2/SDL2JoyConPair.cs

@@ -0,0 +1,146 @@
+using Ryujinx.Common.Configuration.Hid;
+using Ryujinx.Common.Configuration.Hid.Controller;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using static SDL2.SDL;
+
+namespace Ryujinx.Input.SDL2
+{
+    internal class SDL2JoyConPair(IGamepad left, IGamepad right) : IGamepad
+    {
+        private StandardControllerInputConfig _configuration;
+
+        private readonly StickInputId[] _stickUserMapping =
+        [
+            StickInputId.Unbound,
+            StickInputId.Left,
+            StickInputId.Right
+        ];
+
+        public GamepadFeaturesFlag Features => (left?.Features ?? GamepadFeaturesFlag.None) |
+                                               (right?.Features ?? GamepadFeaturesFlag.None);
+
+        public const string Id = "JoyConPair";
+        string IGamepad.Id => Id;
+
+        public string Name => "* Nintendo Switch Joy-Con (L/R)";
+        public bool IsConnected => left is { IsConnected: true } && right is { IsConnected: true };
+
+        public void Dispose()
+        {
+            left?.Dispose();
+            right?.Dispose();
+        }
+
+        public GamepadStateSnapshot GetMappedStateSnapshot()
+        {
+            return GetStateSnapshot();
+        }
+
+        public Vector3 GetMotionData(MotionInputId inputId)
+        {
+            return inputId switch
+            {
+                MotionInputId.Accelerometer or
+                    MotionInputId.Gyroscope => left.GetMotionData(inputId),
+                MotionInputId.SecondAccelerometer => right.GetMotionData(MotionInputId.Accelerometer),
+                MotionInputId.SecondGyroscope => right.GetMotionData(MotionInputId.Gyroscope),
+                _ => Vector3.Zero
+            };
+        }
+
+        public GamepadStateSnapshot GetStateSnapshot()
+        {
+            return IGamepad.GetStateSnapshot(this);
+        }
+
+        public (float, float) GetStick(StickInputId inputId)
+        {
+            return inputId switch
+            {
+                StickInputId.Left => left.GetStick(StickInputId.Left),
+                StickInputId.Right => right.GetStick(StickInputId.Right),
+                _ => (0, 0)
+            };
+        }
+
+        public bool IsPressed(GamepadButtonInputId inputId)
+        {
+            return left.IsPressed(inputId) || right.IsPressed(inputId);
+        }
+
+        public void Rumble(float lowFrequency, float highFrequency, uint durationMs)
+        {
+            if (lowFrequency != 0)
+            {
+                right.Rumble(lowFrequency, lowFrequency, durationMs);
+            }
+
+            if (highFrequency != 0)
+            {
+                left.Rumble(highFrequency, highFrequency, durationMs);
+            }
+
+            if (lowFrequency == 0 && highFrequency == 0)
+            {
+                left.Rumble(0, 0, durationMs);
+                right.Rumble(0, 0, durationMs);
+            }
+        }
+
+        public void SetConfiguration(InputConfig configuration)
+        {
+            left.SetConfiguration(configuration);
+            right.SetConfiguration(configuration);
+        }
+
+        public void SetLed(uint packedRgb)
+        {
+        }
+
+        public void SetTriggerThreshold(float triggerThreshold)
+        {
+            left.SetTriggerThreshold(triggerThreshold);
+            right.SetTriggerThreshold(triggerThreshold);
+        }
+
+        public static bool IsCombinable(List<string> gamepadsIds)
+        {
+            (int leftIndex, int rightIndex) = DetectJoyConPair(gamepadsIds);
+            return leftIndex >= 0 && rightIndex >= 0;
+        }
+
+        private static (int leftIndex, int rightIndex) DetectJoyConPair(List<string> gamepadsIds)
+        {
+            var gamepadNames = gamepadsIds.Where(gamepadId => gamepadId != Id)
+                .Select((_, index) => SDL_GameControllerNameForIndex(index)).ToList();
+            int leftIndex = gamepadNames.IndexOf(SDL2JoyCon.LeftName);
+            int rightIndex = gamepadNames.IndexOf(SDL2JoyCon.RightName);
+
+            return (leftIndex, rightIndex);
+        }
+
+        public static IGamepad GetGamepad(List<string> gamepadsIds)
+        {
+            (int leftIndex, int rightIndex) = DetectJoyConPair(gamepadsIds);
+            if (leftIndex == -1 || rightIndex == -1)
+            {
+                return null;
+            }
+
+            nint leftGamepadHandle = SDL_GameControllerOpen(leftIndex);
+            nint rightGamepadHandle = SDL_GameControllerOpen(rightIndex);
+
+            if (leftGamepadHandle == nint.Zero || rightGamepadHandle == nint.Zero)
+            {
+                return null;
+            }
+
+
+            return new SDL2JoyConPair(new SDL2JoyCon(leftGamepadHandle, gamepadsIds[leftIndex]),
+                new SDL2JoyCon(rightGamepadHandle, gamepadsIds[rightIndex]));
+        }
+    }
+}

src/Ryujinx.Input/HLE/NpadController.cs

@@ -269,6 +269,7 @@ namespace Ryujinx.Input.HLE
             if (motionConfig.MotionBackend != MotionInputBackendType.CemuHook)
             {
                 _leftMotionInput = new MotionInput();
+                _rightMotionInput = new MotionInput();
             }
             else
             {
@@ -301,7 +302,20 @@ namespace Ryujinx.Input.HLE
 
                             if (controllerConfig.ControllerType == ConfigControllerType.JoyconPair)
                             {
-                                _rightMotionInput = _leftMotionInput;
+                                if (gamepad.Id== "JoyConPair")
+                                {
+                                    Vector3 rightAccelerometer = gamepad.GetMotionData(MotionInputId.SecondAccelerometer);
+                                    Vector3 rightGyroscope = gamepad.GetMotionData(MotionInputId.SecondGyroscope);
+
+                                    rightAccelerometer = new Vector3(rightAccelerometer.X, -rightAccelerometer.Z, rightAccelerometer.Y);
+                                    rightGyroscope = new Vector3(rightGyroscope.X, -rightGyroscope.Z, rightGyroscope.Y);
+
+                                    _rightMotionInput.Update(rightAccelerometer, rightGyroscope, (ulong)PerformanceCounter.ElapsedNanoseconds / 1000, controllerConfig.Motion.Sensitivity, (float)controllerConfig.Motion.GyroDeadzone);
+                                }
+                                else
+                                {
+                                    _rightMotionInput = _leftMotionInput;
+                                }
                             }
                         }
                     }
@@ -336,6 +350,7 @@ namespace Ryujinx.Input.HLE
                 // Reset states
                 State = default;
                 _leftMotionInput = null;
+                _rightMotionInput = null;
             }
         }
 

src/Ryujinx.Input/MotionInputId.cs

@@ -21,5 +21,17 @@ namespace Ryujinx.Input
         /// </summary>
         /// <remarks>Values are in degrees</remarks>
         Gyroscope,
+
+        /// <summary>
+        /// Second accelerometer.
+        /// </summary>
+        /// <remarks>Values are in m/s^2</remarks>
+        SecondAccelerometer,
+
+        /// <summary>
+        /// Second gyroscope.
+        /// </summary>
+        /// <remarks>Values are in degrees</remarks>
+        SecondGyroscope
     }
 }

src/Ryujinx.SDL2.Common/SDL2Driver.cs

@@ -25,14 +25,17 @@ namespace Ryujinx.SDL2.Common
 
         public static Action<Action> MainThreadDispatcher { get; set; }
 
-        private const uint SdlInitFlags = SDL_INIT_EVENTS | SDL_INIT_GAMECONTROLLER | SDL_INIT_JOYSTICK | SDL_INIT_AUDIO | SDL_INIT_VIDEO;
+        private const uint SdlInitFlags = SDL_INIT_EVENTS | SDL_INIT_GAMECONTROLLER | SDL_INIT_JOYSTICK |
+                                          SDL_INIT_AUDIO | SDL_INIT_VIDEO;
 
         private bool _isRunning;
         private uint _refereceCount;
         private Thread _worker;
 
+        private const uint SDL_JOYBATTERYUPDATED = 1543;
         public event Action<int, int> OnJoyStickConnected;
         public event Action<int> OnJoystickDisconnected;
+        public event Action<int, SDL_JoystickPowerLevel> OnJoyBatteryUpdated;
 
         private ConcurrentDictionary<uint, Action<SDL_Event>> _registeredWindowHandlers;
 
@@ -78,12 +81,14 @@ namespace Ryujinx.SDL2.Common
                 // First ensure that we only enable joystick events (for connected/disconnected).
                 if (SDL_GameControllerEventState(SDL_IGNORE) != SDL_IGNORE)
                 {
-                    Logger.Error?.PrintMsg(LogClass.Application, "Couldn't change the state of game controller events.");
+                    Logger.Error?.PrintMsg(LogClass.Application,
+                        "Couldn't change the state of game controller events.");
                 }
 
                 if (SDL_JoystickEventState(SDL_ENABLE) < 0)
                 {
-                    Logger.Error?.PrintMsg(LogClass.Application, $"Failed to enable joystick event polling: {SDL_GetError()}");
+                    Logger.Error?.PrintMsg(LogClass.Application,
+                        $"Failed to enable joystick event polling: {SDL_GetError()}");
                 }
 
                 // Disable all joysticks information, we don't need them no need to flood the event queue for that.
@@ -143,7 +148,12 @@ namespace Ryujinx.SDL2.Common
 
                 OnJoystickDisconnected?.Invoke(evnt.cbutton.which);
             }
-            else if (evnt.type is SDL_EventType.SDL_WINDOWEVENT or SDL_EventType.SDL_MOUSEBUTTONDOWN or SDL_EventType.SDL_MOUSEBUTTONUP)
+            else if ((uint)evnt.type == SDL_JOYBATTERYUPDATED)
+            {
+                OnJoyBatteryUpdated?.Invoke(evnt.cbutton.which, (SDL_JoystickPowerLevel)evnt.user.code);
+            }
+            else if (evnt.type is SDL_EventType.SDL_WINDOWEVENT or SDL_EventType.SDL_MOUSEBUTTONDOWN
+                     or SDL_EventType.SDL_MOUSEBUTTONUP)
             {
                 if (_registeredWindowHandlers.TryGetValue(evnt.window.windowID, out Action<SDL_Event> handler))
                 {