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RetroArch/input/drivers_joypad/xinput_joypad.c
twinaphex 38d099654e Cleanups
2015-09-05 20:49:57 +02:00

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2013-2015 - pinumbernumber
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
* PURPOSE. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
/* Support 360 controllers on Windows.
* Said controllers do show under DInput but they have limitations in this mode;
* The triggers are combined rather than seperate and it is not possible to use
* the guide button.
*
* Some wrappers for other controllers also simulate xinput (as it is easier to implement)
* so this may be useful for those also.
**/
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <retro_inline.h>
#include <dynamic/dylib.h>
#include <boolean.h>
#include "../input_autodetect.h"
#include "../input_common.h"
#include "../../general.h"
/* Check if the definitions do not already exist.
* Official and mingw xinput headers have different include guards.
*/
#if ((!_XINPUT_H_) && (!__WINE_XINPUT_H))
#define XINPUT_GAMEPAD_DPAD_UP 0x0001
#define XINPUT_GAMEPAD_DPAD_DOWN 0x0002
#define XINPUT_GAMEPAD_DPAD_LEFT 0x0004
#define XINPUT_GAMEPAD_DPAD_RIGHT 0x0008
#define XINPUT_GAMEPAD_START 0x0010
#define XINPUT_GAMEPAD_BACK 0x0020
#define XINPUT_GAMEPAD_LEFT_THUMB 0x0040
#define XINPUT_GAMEPAD_RIGHT_THUMB 0x0080
#define XINPUT_GAMEPAD_LEFT_SHOULDER 0x0100
#define XINPUT_GAMEPAD_RIGHT_SHOULDER 0x0200
#define XINPUT_GAMEPAD_A 0x1000
#define XINPUT_GAMEPAD_B 0x2000
#define XINPUT_GAMEPAD_X 0x4000
#define XINPUT_GAMEPAD_Y 0x8000
typedef struct
{
uint16_t wButtons;
uint8_t bLeftTrigger;
uint8_t bRightTrigger;
int16_t sThumbLX;
int16_t sThumbLY;
int16_t sThumbRX;
int16_t sThumbRY;
} XINPUT_GAMEPAD;
typedef struct
{
uint32_t dwPacketNumber;
XINPUT_GAMEPAD Gamepad;
} XINPUT_STATE;
typedef struct
{
uint16_t wLeftMotorSpeed;
uint16_t wRightMotorSpeed;
} XINPUT_VIBRATION;
#endif
/* Guide constant is not officially documented. */
#define XINPUT_GAMEPAD_GUIDE 0x0400
#ifndef ERROR_DEVICE_NOT_CONNECTED
#define ERROR_DEVICE_NOT_CONNECTED 1167
#endif
#ifndef HAVE_DINPUT
#error Cannot compile xinput without dinput.
#endif
/* Due to 360 pads showing up under both XInput and DirectInput,
* and since we are going to have to pass through unhandled
* joypad numbers to DirectInput, a slightly ugly
* hack is required here. dinput_joypad_init will fill this.
*
* For each pad index, the appropriate entry will be set to -1 if it is not
* a 360 pad, or the correct XInput user number (0..3 inclusive) if it is.
*/
extern int g_xinput_pad_indexes[MAX_USERS];
extern bool g_xinput_block_pads;
/* For xinput1_n.dll */
static dylib_t g_xinput_dll;
/* Function pointer, to be assigned with dylib_proc */
typedef uint32_t (__stdcall *XInputGetStateEx_t)(uint32_t, XINPUT_STATE*);
static XInputGetStateEx_t g_XInputGetStateEx;
typedef uint32_t (__stdcall *XInputSetState_t)(uint32_t, XINPUT_VIBRATION*);
static XInputSetState_t g_XInputSetState;
/* Guide button may or may not be available */
static bool g_xinput_guide_button_supported;
typedef struct
{
XINPUT_STATE xstate;
bool connected;
} xinput_joypad_state;
static XINPUT_VIBRATION g_xinput_rumble_states[4];
static xinput_joypad_state g_xinput_states[4];
static INLINE int pad_index_to_xuser_index(unsigned pad)
{
return g_xinput_pad_indexes[pad];
}
/* Generic "XInput" instead of "Xbox 360", because there are
* some other non-xbox third party PC controllers.
*/
static const char* const XBOX_CONTROLLER_NAMES[4] =
{
"XInput Controller (User 1)",
"XInput Controller (User 2)",
"XInput Controller (User 3)",
"XInput Controller (User 4)"
};
const char *xinput_joypad_name(unsigned pad)
{
int xuser = pad_index_to_xuser_index(pad);
if (xuser < 0)
return dinput_joypad.name(pad);
/* TODO: Different name if disconnected? */
return XBOX_CONTROLLER_NAMES[xuser];
}
static bool xinput_joypad_init(void *data)
{
unsigned i, autoconf_pad;
XINPUT_STATE dummy_state;
const char *version = "1.4";
settings_t *settings = config_get_ptr();
(void)data;
g_xinput_dll = NULL;
/* Find the correct path to load the DLL from.
* Usually this will be from the system directory,
* but occasionally a user may wish to use a third-party
* wrapper DLL (such as x360ce); support these by checking
* the working directory first.
*
* No need to check for existance as we will be checking dylib_load's
* success anyway.
*/
g_xinput_dll = dylib_load("xinput1_4.dll");
if (!g_xinput_dll)
{
g_xinput_dll = dylib_load("xinput1_3.dll");
version = "1.3";
}
if (!g_xinput_dll)
{
RARCH_ERR("Failed to load XInput, ensure DirectX and controller drivers are up to date.\n");
return false;
}
RARCH_LOG("Found XInput v%s.\n", version);
/* If we get here then an xinput DLL is correctly loaded.
* First try to load ordinal 100 (XInputGetStateEx).
*/
g_XInputGetStateEx = (XInputGetStateEx_t)dylib_proc(g_xinput_dll, (const char*)100);
g_xinput_guide_button_supported = true;
if (!g_XInputGetStateEx)
{
/* no ordinal 100. (Presumably a wrapper.) Load the ordinary
* XInputGetState, at the cost of losing guide button support.
*/
g_xinput_guide_button_supported = false;
g_XInputGetStateEx = (XInputGetStateEx_t)dylib_proc(g_xinput_dll, "XInputGetState");
if (!g_XInputGetStateEx)
{
RARCH_ERR("Failed to init XInput: DLL is invalid or corrupt.\n");
dylib_close(g_xinput_dll);
return false; /* DLL was loaded but did not contain the correct function. */
}
RARCH_WARN("XInput: No guide button support.\n");
}
g_XInputSetState = (XInputSetState_t)dylib_proc(g_xinput_dll, "XInputSetState");
if (!g_XInputSetState)
{
RARCH_ERR("Failed to init XInput: DLL is invalid or corrupt.\n");
dylib_close(g_xinput_dll);
return false; /* DLL was loaded but did not contain the correct function. */
}
/* Zero out the states. */
for (i = 0; i < 4; ++i)
memset(&g_xinput_states[i], 0, sizeof(xinput_joypad_state));
/* Do a dummy poll to check which controllers are connected. */
for (i = 0; i < 4; ++i)
{
g_xinput_states[i].connected = !(g_XInputGetStateEx(i, &dummy_state) == ERROR_DEVICE_NOT_CONNECTED);
if (g_xinput_states[i].connected)
RARCH_LOG("Found XInput controller, user #%u\n", i);
}
if ((!g_xinput_states[0].connected) &&
(!g_xinput_states[1].connected) &&
(!g_xinput_states[2].connected) &&
(!g_xinput_states[3].connected))
return false;
g_xinput_block_pads = true;
/* We're going to have to be buddies with dinput if we want to be able
* to use XInput and non-XInput controllers together. */
if (!dinput_joypad.init(data))
{
g_xinput_block_pads = false;
return false;
}
for (autoconf_pad = 0; autoconf_pad < MAX_USERS; autoconf_pad++)
{
if (pad_index_to_xuser_index(autoconf_pad) > -1)
{
autoconfig_params_t params = {{0}};
strlcpy(settings->input.device_names[autoconf_pad],
xinput_joypad_name(autoconf_pad),
sizeof(settings->input.device_names[autoconf_pad]));
/* TODO - implement VID/PID? */
params.idx = autoconf_pad;
strlcpy(params.name, xinput_joypad_name(autoconf_pad), sizeof(params.name));
strlcpy(params.driver, xinput_joypad.ident, sizeof(params.driver));
input_config_autoconfigure_joypad(&params);
}
}
return true;
}
static bool xinput_joypad_query_pad(unsigned pad)
{
int xuser = pad_index_to_xuser_index(pad);
if (xuser > -1)
return g_xinput_states[xuser].connected;
return dinput_joypad.query_pad(pad);
}
static void xinput_joypad_destroy(void)
{
unsigned i;
for (i = 0; i < 4; ++i)
memset(&g_xinput_states[i], 0, sizeof(xinput_joypad_state));
dylib_close(g_xinput_dll);
g_xinput_dll = NULL;
g_XInputGetStateEx = NULL;
g_XInputSetState = NULL;
dinput_joypad.destroy();
g_xinput_block_pads = false;
}
/* Buttons are provided by XInput as bits of a uint16.
* Map from rarch button index (0..10) to a mask to bitwise-& the buttons against.
* dpad is handled seperately. */
static const uint16_t button_index_to_bitmap_code[] = {
XINPUT_GAMEPAD_A,
XINPUT_GAMEPAD_B,
XINPUT_GAMEPAD_X,
XINPUT_GAMEPAD_Y,
XINPUT_GAMEPAD_LEFT_SHOULDER,
XINPUT_GAMEPAD_RIGHT_SHOULDER,
XINPUT_GAMEPAD_START,
XINPUT_GAMEPAD_BACK,
XINPUT_GAMEPAD_LEFT_THUMB,
XINPUT_GAMEPAD_RIGHT_THUMB,
XINPUT_GAMEPAD_GUIDE
};
static bool xinput_joypad_button(unsigned port_num, uint16_t joykey)
{
uint16_t btn_word;
int xuser;
unsigned num_buttons = 0;
if (joykey == NO_BTN)
return false;
xuser = pad_index_to_xuser_index(port_num);
if (xuser == -1)
return dinput_joypad.button(port_num, joykey);
if (!(g_xinput_states[xuser].connected))
return false;
btn_word = g_xinput_states[xuser].xstate.Gamepad.wButtons;
if (GET_HAT_DIR(joykey))
{
switch (GET_HAT_DIR(joykey))
{
case HAT_UP_MASK:
return btn_word & XINPUT_GAMEPAD_DPAD_UP;
case HAT_DOWN_MASK:
return btn_word & XINPUT_GAMEPAD_DPAD_DOWN;
case HAT_LEFT_MASK:
return btn_word & XINPUT_GAMEPAD_DPAD_LEFT;
case HAT_RIGHT_MASK:
return btn_word & XINPUT_GAMEPAD_DPAD_RIGHT;
}
return false; /* hat requested and no hat button down. */
}
/* non-hat button. */
num_buttons = g_xinput_guide_button_supported ? 11 : 10;
if (joykey < num_buttons)
return btn_word & button_index_to_bitmap_code[joykey];
return false;
}
static int16_t xinput_joypad_axis (unsigned port_num, uint32_t joyaxis)
{
int xuser;
int16_t val = 0;
int axis = -1;
bool is_neg = false;
bool is_pos = false;
if (joyaxis == AXIS_NONE)
return 0;
xuser = pad_index_to_xuser_index(port_num);
if (xuser == -1)
return dinput_joypad.axis(port_num, joyaxis);
if (!(g_xinput_states[xuser].connected))
return 0;
/* triggers (axes 4,5) cannot be negative */
if (AXIS_NEG_GET(joyaxis) <= 3)
{
axis = AXIS_NEG_GET(joyaxis);
is_neg = true;
}
else if (AXIS_POS_GET(joyaxis) <= 5)
{
axis = AXIS_POS_GET(joyaxis);
is_pos = true;
}
XINPUT_GAMEPAD* pad = &(g_xinput_states[xuser].xstate.Gamepad);
switch (axis)
{
case 0:
val = pad->sThumbLX;
break;
case 1:
val = pad->sThumbLY;
break;
case 2:
val = pad->sThumbRX;
break;
case 3:
val = pad->sThumbRY;
break;
case 4:
val = pad->bLeftTrigger * 32767 / 255;
break; /* map 0..255 to 0..32767 */
case 5:
val = pad->bRightTrigger * 32767 / 255;
break;
}
if (is_neg && val > 0)
val = 0;
else if (is_pos && val < 0)
val = 0;
/* Clamp to avoid overflow error. */
if (val == -32768)
val = -32767;
return val;
}
static void xinput_joypad_poll(void)
{
unsigned i;
for (i = 0; i < 4; ++i)
{
if (g_xinput_states[i].connected)
{
if (g_XInputGetStateEx(i,
&(g_xinput_states[i].xstate))
== ERROR_DEVICE_NOT_CONNECTED)
g_xinput_states[i].connected = false;
}
}
dinput_joypad.poll();
}
static bool xinput_joypad_rumble(unsigned pad,
enum retro_rumble_effect effect, uint16_t strength)
{
int xuser = pad_index_to_xuser_index(pad);
if (xuser == -1)
{
if (dinput_joypad.set_rumble)
return dinput_joypad.set_rumble(pad, effect, strength);
return false;
}
/* Consider the low frequency (left) motor the "strong" one. */
if (effect == RETRO_RUMBLE_STRONG)
g_xinput_rumble_states[xuser].wLeftMotorSpeed = strength;
else if (effect == RETRO_RUMBLE_WEAK)
g_xinput_rumble_states[xuser].wRightMotorSpeed = strength;
return (g_XInputSetState(xuser, &g_xinput_rumble_states[xuser])
== 0);
}
input_device_driver_t xinput_joypad = {
xinput_joypad_init,
xinput_joypad_query_pad,
xinput_joypad_destroy,
xinput_joypad_button,
NULL,
xinput_joypad_axis,
xinput_joypad_poll,
xinput_joypad_rumble,
xinput_joypad_name,
"xinput",
};
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