libretro: Fix input handling for multiplayer games

negativeExponent · negativeExponent · commit d6d5d956793d · 2025-12-05T08:59:12.000+08:00
Input handler was just previously reading from port 1
diff --git a/src/libretro/libretro.cpp b/src/libretro/libretro.cpp
@@ -1640,11 +1640,11 @@ static void updateInput_Joypad(void)
 
         if (retropad_device[port] == RETRO_DEVICE_JOYPAD) {
             if (libretro_supports_bitmasks)
-                inbuf = input_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);
+                inbuf = input_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);
             else
             {
                 for (int i = 0; i < (RETRO_DEVICE_ID_JOYPAD_R3 + 1); i++)
-                    inbuf |= input_cb(0, RETRO_DEVICE_JOYPAD, 0, i) ? (1 << i) : 0;
+                    inbuf |= input_cb(port, RETRO_DEVICE_JOYPAD, 0, i) ? (1 << i) : 0;
             }
 
             for (unsigned button = 0; button < max_buttons; button++)

Original file line number	Diff line number	Diff line change
`@@ -1640,11 +1640,11 @@ static void updateInput_Joypad(void)`
`1640`	`1640`
`1641`	`1641`	`if (retropad_device[port] == RETRO_DEVICE_JOYPAD) {`
`1642`	`1642`	`if (libretro_supports_bitmasks)`
`1643`		`- inbuf = input_cb(0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);`
	`1643`	`+ inbuf = input_cb(port, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_MASK);`
`1644`	`1644`	`else`
`1645`	`1645`	`{`
`1646`	`1646`	`for (int i = 0; i < (RETRO_DEVICE_ID_JOYPAD_R3 + 1); i++)`
`1647`		`- inbuf \|= input_cb(0, RETRO_DEVICE_JOYPAD, 0, i) ? (1 << i) : 0;`
	`1647`	`+ inbuf \|= input_cb(port, RETRO_DEVICE_JOYPAD, 0, i) ? (1 << i) : 0;`
`1648`	`1648`	`}`
`1649`	`1649`
`1650`	`1650`	`for (unsigned button = 0; button < max_buttons; button++)`