From 6776b08bce059f263a9a74f1b23eb0816bfc7aba Mon Sep 17 00:00:00 2001
From: cchike <cchike4@gmail.com>
Date: Sun, 21 Dec 2025 20:49:39 -0800
Subject: [PATCH] MDX: Refactored p4io.cpp (#467)

## Link to GitHub Issue, if one exists
#452

## Description of change
Added `Sleep(4)` call to regulate how fast the `device_io` function will
call `getState` for each button. The panel buttons were commented out
because those are handled by the MDXF Control Status Buffer functions
anyways, so the work was redundant. It's also why the timing precision
from this function doesn't matter, so it can afford a longer sleep

## Testing
- Verified IO still functions properly
- Verified decrease in overall CPU usage
---
 src/spice2x/games/ddr/p4io/p4io.cpp | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/src/spice2x/games/ddr/p4io/p4io.cpp b/src/spice2x/games/ddr/p4io/p4io.cpp
index 2ea4a1b..dd13a90 100644
--- a/src/spice2x/games/ddr/p4io/p4io.cpp
+++ b/src/spice2x/games/ddr/p4io/p4io.cpp
@@ -253,28 +253,25 @@ namespace games::ddr {
         if(((dwIoControlCode>>16)&0xFFFF) == FILE_DEVICE_UNKNOWN) {
             switch((dwIoControlCode>>2)&0x3FFF) {
                 case P4IO_IOCTL_GET_INPUTS: {
+                    
+                    // Prevents this function from being called at its normal 2000-2500 kHz cadence and overloading the CPU, instead reduces it to 250 Hz
+                    Sleep(4);
+                    
                     memset(lpOutBuffer, 0, 16);
                     auto controls = (uint32_t*) lpOutBuffer;
 
                     const std::pair<size_t, uint8_t> buttonMapping[] =
                     {
+                        // Panel input comes from MDXF Control Status Buffer functions
                         {Buttons::SERVICE, 25}, //Good
                         {Buttons::TEST, 28}, //Good
                         {Buttons::COIN_MECH, 24}, //Good
                         {Buttons::P1_START, 0}, //Good
-                        {Buttons::P1_PANEL_UP, 5}, //Good
-                        {Buttons::P1_PANEL_DOWN, 6}, //Good
-                        {Buttons::P1_PANEL_LEFT, 7}, //Goood
-                        {Buttons::P1_PANEL_RIGHT, 16}, //Good
                         {Buttons::P1_MENU_UP, 1}, //Good
                         {Buttons::P1_MENU_DOWN, 2}, //Good
                         {Buttons::P1_MENU_LEFT, 3}, //Good
                         {Buttons::P1_MENU_RIGHT, 4}, //Good
                         {Buttons::P2_START, 8}, //Good
-                        {Buttons::P2_PANEL_UP, 13}, //Good
-                        {Buttons::P2_PANEL_DOWN, 14}, //Good
-                        {Buttons::P2_PANEL_LEFT, 15}, //Good
-                        {Buttons::P2_PANEL_RIGHT, 20}, //Good
                         {Buttons::P2_MENU_UP, 9}, //Good
                         {Buttons::P2_MENU_DOWN, 10}, //Good
                         {Buttons::P2_MENU_LEFT, 11}, //Good