[input/sdl] nuke SDL_Vibration thread (#4299)

Signed-off-by: lizzie <lizzie@eden-emu.dev>

- [x] I have read and followed the [Contribution Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/CONTRIBUTING.md#code-contributions).
- [x] I have read and followed the [AI Policy](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/AI.md)
- [x] I have read and followed the [Coding Guidelines](https://git.eden-emu.dev/eden-emu/eden/src/branch/master/docs/policies/Coding.md) to the best of my ability.

-------------------

isn't it net faster to just...send things, serially?
especially since vibration occurs so non-often...
i dont think it would cause any issues

TEST: if this causes ANY sort of perf regression on games
when the thing vibrates WITH AN SDL CONFIGURED GAMEPAD OR WHATEVER

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4299
Reviewed-by: Maufeat <sahyno1996@gmail.com>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>

src/input_common/drivers/sdl_driver.cpp

@@ -697,16 +697,6 @@ SDLDriver::SDLDriver(std::string input_engine_) : InputEngine(std::move(input_en
     SDL_AddEventWatch(&SDLEventWatcher, this);
 
     initialized = true;
-    if (start_thread) {
-        vibration_thread = std::thread([this] {
-            Common::SetCurrentThreadName("SDL_Vibration");
-            using namespace std::chrono_literals;
-            while (initialized) {
-                SendVibrations();
-                std::this_thread::sleep_for(250ms); // 4 TPS
-            }
-        });
-    }
     // Because the events for joystick connection happens before we have our event watcher added, we
     // can just open all the joysticks right here
     int joystick_count = 0;
@@ -725,7 +715,6 @@ SDLDriver::~SDLDriver() {
 
     initialized = false;
     if (start_thread) {
-        vibration_thread.join();
         SDL_QuitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_GAMEPAD);
     }
 }
@@ -805,10 +794,7 @@ Common::Input::DriverResult SDLDriver::SetVibration(
         .type = Common::Input::VibrationAmplificationType::Exponential,
     };
 
-    vibration_queue.Push(VibrationRequest{
-        .identifier = identifier,
-        .vibration = new_vibration,
-    });
+    joystick->RumblePlay(new_vibration);
 
     return Common::Input::DriverResult::Success;
 }
@@ -852,31 +838,6 @@ bool SDLDriver::IsVibrationEnabled(const PadIdentifier& identifier) {
     return true;
 }
 
-void SDLDriver::SendVibrations() {
-    std::vector<VibrationRequest> filtered_vibrations{};
-    while (!vibration_queue.Empty()) {
-        VibrationRequest request;
-        vibration_queue.Pop(request);
-        const auto joystick = GetSDLJoystickByGUID(request.identifier.guid.RawString(),
-                                                   static_cast<int>(request.identifier.port));
-        const auto it = std::find_if(filtered_vibrations.begin(), filtered_vibrations.end(),
-                                     [request](VibrationRequest vibration) {
-                                         return vibration.identifier == request.identifier;
-                                     });
-        if (it == filtered_vibrations.end()) {
-            filtered_vibrations.push_back(std::move(request));
-            continue;
-        }
-        *it = request;
-    }
-
-    for (const auto& vibration : filtered_vibrations) {
-        const auto joystick = GetSDLJoystickByGUID(vibration.identifier.guid.RawString(),
-                                                   static_cast<int>(vibration.identifier.port));
-        joystick->RumblePlay(vibration.vibration);
-    }
-}
-
 Common::ParamPackage SDLDriver::BuildAnalogParamPackageForButton(int port, const Common::UUID& guid,
                                                                  s32 axis, float value) const {
     Common::ParamPackage params{};

src/input_common/drivers/sdl_driver.h

@@ -113,16 +113,11 @@ private:
     /// Returns true if the button is on the left joycon
     bool IsButtonOnLeftSide(Settings::NativeButton::Values button) const;
 
-    /// Queue of vibration request to controllers
-    Common::SPSCQueue<VibrationRequest> vibration_queue;
-
     /// Map of GUID of a list of corresponding virtual Joysticks
     ::Common::unordered_map<Common::UUID, std::vector<std::shared_ptr<SDLJoystick>>> joystick_map;
     std::mutex joystick_map_mutex;
 
-    bool start_thread = false;
     std::atomic<bool> initialized = false;
-
-    std::thread vibration_thread;
+    bool start_thread;
 };
 } // namespace InputCommon