Remove 1 frame of input lag

libretro · Nov 3, 2021 · 1a4d34b · 1a4d34b
1 parent 0eab2fe
commit 1a4d34b
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Showing 3 changed files with 11 additions and 2 deletions.
diff --git a/src/emu/machine.cpp b/src/emu/machine.cpp
@@ -1449,6 +1449,11 @@ void running_machine::retro_machineexit(){
 
 void running_machine::retro_loop(){
 
+	// get most recent input now 
+	m_manager.osd().input_update();
+	// perform tasks for this frame
+	call_notifiers(MACHINE_NOTIFY_FRAME);
+
 	while (RLOOP==1) {
 
 		// execute CPUs if not paused

diff --git a/src/emu/video.cpp b/src/emu/video.cpp
@@ -243,15 +243,19 @@ void video_manager::frame_update(bool from_debugger)
 	if (!from_debugger && !skipped_it && phase > machine_phase::INIT && m_low_latency && effective_throttle())
 		update_throttle(current_time);
 
+#if !defined(__LIBRETRO__)
 	// get most recent input now
 	machine().osd().input_update();
+#endif
 
 	emulator_info::periodic_check();
 
 	if (!from_debugger)
 	{
+#if !defined(__LIBRETRO__)
 		// perform tasks for this frame
 		machine().call_notifiers(MACHINE_NOTIFY_FRAME);
+#endif
 
 		// update frameskipping
 		if (phase > machine_phase::INIT)

diff --git a/src/osd/libretro/video.cpp b/src/osd/libretro/video.cpp
@@ -120,6 +120,8 @@ void retro_osd_interface::update(bool skip_redraw)
 	// if we're running, disable some parts of the debugger
  	if ((machine().debug_flags & DEBUG_FLAG_OSD_ENABLED) != 0)
 		debugger_update();
+
+	RLOOP=0;
 }
 
 //============================================================
@@ -131,8 +133,6 @@ void retro_osd_interface::input_update()
 	process_events_buf();
 	poll_inputs(machine());
 	check_osd_inputs(machine());
-
-	RLOOP=0;
 }
 
 //============================================================