add pause hotkey (#509)

parallel-rdp/interface.cpp

@@ -151,6 +151,7 @@ bool sdl_event_filter(void *userdata, SDL_Event *event)
 {
 	if (event->type == SDL_EVENT_WINDOW_CLOSE_REQUESTED)
 	{
+		callback.paused = false;
 		callback.emu_running = false;
 	}
 	else if (event->type == SDL_EVENT_WINDOW_RESIZED && callback.emu_running)
@@ -174,6 +175,12 @@ bool sdl_event_filter(void *userdata, SDL_Event *event)
 				callback.enable_speedlimiter = !callback.enable_speedlimiter;
 			}
 			break;
+		case SDL_SCANCODE_P:
+			if (event->key.mod & SDL_KMOD_ALT)
+			{
+				callback.paused = !callback.paused;
+			}
+			break;
 		case SDL_SCANCODE_ESCAPE:
 			if (gfx_info.fullscreen)
 				callback.emu_running = false;
@@ -281,6 +288,7 @@ void rdp_init(void *_window, GFX_INFO _gfx_info)
 
 	callback.emu_running = true;
 	callback.enable_speedlimiter = true;
+	callback.paused = false;
 	crop_letterbox = false;
 }
 

parallel-rdp/interface.hpp

@@ -33,6 +33,7 @@ extern "C"
 		bool enable_speedlimiter;
 		bool lower_volume;
 		bool raise_volume;
+		bool paused;
 	} CALL_BACK;
 
 	void rdp_init(void *_window, GFX_INFO _gfx_info);

src/ui/video.rs

@@ -124,7 +124,7 @@ pub fn load_state(device: &mut device::Device, rdp_state: *const u8) {
 
 pub fn check_callback(device: &mut device::Device) -> bool {
     let mut speed_limiter_toggled = false;
-    let callback = unsafe { rdp_check_callback() };
+    let mut callback = unsafe { rdp_check_callback() };
     device.cpu.running = callback.emu_running;
     if device.netplay.is_none() {
         if callback.save_state {
@@ -136,6 +136,11 @@ pub fn check_callback(device: &mut device::Device) -> bool {
             speed_limiter_toggled = true;
             device.vi.enable_speed_limiter = callback.enable_speedlimiter;
         }
+        while callback.paused {
+            std::thread::sleep(std::time::Duration::from_secs_f64(1.0 / 60.0));
+            unsafe { sdl3_sys::events::SDL_PumpEvents() };
+            callback = unsafe { rdp_check_callback() };
+        }
     }
 
     if callback.lower_volume {