Introduce RMG-Input (for linux only)

Source/RMG-Input/Thread/SDLThread.cpp

@@ -0,0 +1,92 @@
+/*
+ * Rosalie's Mupen GUI - https://github.com/Rosalie241/RMG
+ *  Copyright (C) 2020 Rosalie Wanders <rosalie@mailbox.org>
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 3.
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+#include "SDLThread.hpp"
+
+#include <SDL.h>
+
+using namespace Thread;
+
+SDLThread::SDLThread(QObject *parent) : QThread(parent)
+{
+
+}
+
+SDLThread::~SDLThread()
+{
+    if (this->isRunning())
+    {
+        this->StopLoop();
+    }
+}
+
+void SDLThread::StopLoop(void)
+{
+    this->keepLoopRunning = false;
+    while (this->isRunning())
+    {
+        // wait until we're not running anymore
+    }
+}
+
+SDLThreadAction SDLThread::GetCurrentAction(void)
+{
+    return this->currentAction;
+}
+
+void SDLThread::SetAction(SDLThreadAction action)
+{
+    this->currentAction = action;
+}
+
+void SDLThread::run(void)
+{
+    while (this->keepLoopRunning)
+    {
+        switch (this->currentAction)
+        {
+            default:
+            case SDLThreadAction::None:
+                break;
+            case SDLThreadAction::SDLPumpEvents:
+            {
+                SDL_PumpEvents();
+            } break;
+            case SDLThreadAction::GetInputDevices:
+            {
+                // force re-fresh joystick list
+                SDL_JoystickUpdate();
+
+                for (int i = 0; i < SDL_NumJoysticks(); i++)
+                {
+                    const char* name;
+
+                    if (SDL_IsGameController(i))
+                    {
+                        name = SDL_GameControllerNameForIndex(i);
+                    }
+                    else
+                    {
+                        name = SDL_JoystickNameForIndex(i);
+                    }
+
+                    if (name != nullptr)
+                    {
+                        emit this->OnInputDeviceFound(QString(name), i);
+                    }
+                }
+                this->currentAction = SDLThreadAction::None;
+                emit this->OnDeviceSearchFinished();
+            } break;
+        }
+
+        // sleep for 10ms
+        QThread::msleep(10);
+    }
+}