Add poll interval to libScePad (#1415)

src/emulator.cpp

@@ -257,6 +257,7 @@ void Emulator::Run(const std::filesystem::path& file) {
     std::jthread mainthread =
         std::jthread([this](std::stop_token stop_token) { linker->Execute(); });
 
+    window->initTimers();
     while (window->isOpen()) {
         window->waitEvent();
     }

src/input/controller.cpp

@@ -1,10 +1,13 @@
 // SPDX-FileCopyrightText: Copyright 2024 shadPS4 Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
-#include <SDL3/SDL.h>
+#include "controller.h"
+
+#include "common/assert.h"
 #include "core/libraries/kernel/time_management.h"
 #include "core/libraries/pad/pad.h"
-#include "input/controller.h"
+
+#include <SDL3/SDL.h>
 
 namespace Input {
 
@@ -157,4 +160,23 @@ void GameController::TryOpenSDLController() {
     }
 }
 
+u32 GameController::Poll() {
+    if (m_connected) {
+        auto time = Libraries::Kernel::sceKernelGetProcessTime();
+        if (m_states_num == 0) {
+            auto diff = (time - m_last_state.time) / 1000;
+            if (diff >= 100) {
+                AddState(GetLastState());
+            }
+        } else {
+            auto index = (m_first_state - 1 + m_states_num) % MAX_STATES;
+            auto diff = (time - m_states[index].time) / 1000;
+            if (m_private[index].obtained && diff >= 100) {
+                AddState(GetLastState());
+            }
+        }
+    }
+    return 100;
+}
+
 } // namespace Input

src/input/controller.h

@@ -56,6 +56,7 @@ public:
     bool SetVibration(u8 smallMotor, u8 largeMotor);
     void SetTouchpadState(int touchIndex, bool touchDown, float x, float y);
     void TryOpenSDLController();
+    u32 Poll();
 
 private:
     struct StateInternal {

src/sdl_window.cpp

@@ -4,6 +4,7 @@
 #include <SDL3/SDL_events.h>
 #include <SDL3/SDL_init.h>
 #include <SDL3/SDL_properties.h>
+#include <SDL3/SDL_timer.h>
 #include <SDL3/SDL_video.h>
 #include "common/assert.h"
 #include "common/config.h"
@@ -20,6 +21,11 @@
 
 namespace Frontend {
 
+static Uint32 SDLCALL PollController(void* userdata, SDL_TimerID timer_id, Uint32 interval) {
+    auto* controller = reinterpret_cast<Input::GameController*>(userdata);
+    return controller->Poll();
+}
+
 WindowSDL::WindowSDL(s32 width_, s32 height_, Input::GameController* controller_,
                      std::string_view window_title)
     : width{width_}, height{height_}, controller{controller_} {
@@ -119,6 +125,10 @@ void WindowSDL::waitEvent() {
     }
 }
 
+void WindowSDL::initTimers() {
+    SDL_AddTimer(100, &PollController, controller);
+}
+
 void WindowSDL::onResize() {
     SDL_GetWindowSizeInPixels(window, &width, &height);
     ImGui::Core::OnResize();

src/sdl_window.h

@@ -68,6 +68,8 @@ public:
 
     void waitEvent();
 
+    void initTimers();
+
 private:
     void onResize();
     void onKeyPress(const SDL_Event* event);