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segatools/swdcio/di.c

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#include <windows.h>
#include <dinput.h>
#include <stddef.h>
#include <stdint.h>
#include <wchar.h>
#include "swdcio/backend.h"
#include "swdcio/config.h"
#include "swdcio/di.h"
#include "swdcio/di-dev.h"
#include "swdcio/swdcio.h"
#include "swdcio/wnd.h"
#include "util/dprintf.h"
#include "util/str.h"
struct swdc_di_axis {
wchar_t name[4];
size_t off;
};
static HRESULT swdc_di_config_apply(const struct swdc_di_config *cfg);
static const struct swdc_di_axis *swdc_di_get_axis(const wchar_t *name);
static BOOL CALLBACK swdc_di_enum_callback(
const DIDEVICEINSTANCEW *dev,
void *ctx);
static BOOL CALLBACK swdc_di_enum_callback_pedals(
const DIDEVICEINSTANCEW *dev,
void *ctx);
static void swdc_di_get_buttons(uint16_t *gamebtn_out);
static uint8_t swdc_di_decode_pov(DWORD pov);
static void swdc_di_get_analogs(struct swdc_io_analog_state *out);
static const struct swdc_di_axis swdc_di_axes[] = {
/* Just map DIJOYSTATE for now, we can map DIJOYSTATE2 later if needed */
{ .name = L"X", .off = DIJOFS_X },
{ .name = L"Y", .off = DIJOFS_Y },
{ .name = L"Z", .off = DIJOFS_Z },
{ .name = L"RX", .off = DIJOFS_RX },
{ .name = L"RY", .off = DIJOFS_RY },
{ .name = L"RZ", .off = DIJOFS_RZ },
{ .name = L"U", .off = DIJOFS_SLIDER(0) },
{ .name = L"V", .off = DIJOFS_SLIDER(1) },
};
static const struct swdc_io_backend swdc_di_backend = {
.get_gamebtns = swdc_di_get_buttons,
.get_analogs = swdc_di_get_analogs,
};
static HWND swdc_di_wnd;
static IDirectInput8W *swdc_di_api;
static IDirectInputDevice8W *swdc_di_dev;
static IDirectInputDevice8W *swdc_di_pedals;
static IDirectInputEffect *swdc_di_fx;
static size_t swdc_di_off_brake;
static size_t swdc_di_off_accel;
static uint8_t swdc_di_paddle_left;
static uint8_t swdc_di_paddle_right;
static uint8_t swdc_di_view_chg;
static uint8_t swdc_di_start;
static uint8_t swdc_di_wheel_green;
static uint8_t swdc_di_wheel_red;
static uint8_t swdc_di_wheel_blue;
static uint8_t swdc_di_wheel_yellow;
static bool swdc_di_use_pedals;
static bool swdc_di_reverse_brake_axis;
static bool swdc_di_reverse_accel_axis;
static uint16_t swdc_di_center_spring_strength;
HRESULT swdc_di_init(
const struct swdc_di_config *cfg,
HINSTANCE inst,
const struct swdc_io_backend **backend)
{
HRESULT hr;
HMODULE dinput8;
HRESULT (WINAPI *api_entry)(HINSTANCE,DWORD,REFIID,LPVOID *,LPUNKNOWN);
wchar_t dll_path[MAX_PATH];
UINT path_pos;
assert(cfg != NULL);
assert(backend != NULL);
*backend = NULL;
hr = swdc_di_config_apply(cfg);
if (FAILED(hr)) {
return hr;
}
hr = swdc_io_wnd_create(inst, &swdc_di_wnd);
if (FAILED(hr)) {
return hr;
}
/* SWDC has some built-in DirectInput support that is not
particularly useful. swdchook shorts this out by redirecting dinput8.dll
to a no-op implementation of DirectInput. However, swdcio does need to
talk to the real operating system implementation of DirectInput without
the stub DLL interfering, so build a path to
C:\Windows\System32\dinput.dll here. */
dll_path[0] = L'\0';
path_pos = GetSystemDirectoryW(dll_path, _countof(dll_path));
wcscat_s(
dll_path + path_pos,
_countof(dll_path) - path_pos,
L"\\dinput8.dll");
dinput8 = LoadLibraryW(dll_path);
if (dinput8 == NULL) {
hr = HRESULT_FROM_WIN32(GetLastError());
dprintf("DirectInput: LoadLibrary failed: %08x\n", (int) hr);
return hr;
}
api_entry = (void *) GetProcAddress(dinput8, "DirectInput8Create");
if (api_entry == NULL) {
dprintf("DirectInput: GetProcAddress failed\n");
return E_FAIL;
}
hr = api_entry(
inst,
DIRECTINPUT_VERSION,
&IID_IDirectInput8W,
(void **) &swdc_di_api,
NULL);
if (FAILED(hr)) {
dprintf("DirectInput: API create failed: %08x\n", (int) hr);
return hr;
}
hr = IDirectInput8_EnumDevices(
swdc_di_api,
DI8DEVCLASS_GAMECTRL,
swdc_di_enum_callback,
(void *) cfg,
DIEDFL_ATTACHEDONLY);
if (FAILED(hr)) {
dprintf("DirectInput: EnumDevices failed: %08x\n", (int) hr);
return hr;
}
if (swdc_di_dev == NULL) {
dprintf("Wheel: Controller not found\n");
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
}
hr = swdc_di_dev_start(swdc_di_dev, swdc_di_wnd);
if (FAILED(hr)) {
return hr;
}
// Convert the strength from 0-100 to 0-10000 for DirectInput
swdc_di_dev_start_fx(swdc_di_dev, &swdc_di_fx,
swdc_di_center_spring_strength * 100);
if (cfg->pedals_name[0] != L'\0') {
hr = IDirectInput8_EnumDevices(
swdc_di_api,
DI8DEVCLASS_GAMECTRL,
swdc_di_enum_callback_pedals,
(void *) cfg,
DIEDFL_ATTACHEDONLY);
if (FAILED(hr)) {
dprintf("DirectInput: EnumDevices failed: %08x\n", (int) hr);
return hr;
}
if (swdc_di_dev == NULL) {
dprintf("Pedals: Controller not found\n");
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
}
hr = swdc_di_dev_start(swdc_di_pedals, swdc_di_wnd);
if (FAILED(hr)) {
return hr;
}
swdc_di_use_pedals = true;
} else {
swdc_di_use_pedals = false;
}
dprintf("DirectInput: Controller initialized\n");
*backend = &swdc_di_backend;
return S_OK;
}
static HRESULT swdc_di_config_apply(const struct swdc_di_config *cfg)
{
const struct swdc_di_axis *brake_axis;
const struct swdc_di_axis *accel_axis;
int i;
brake_axis = swdc_di_get_axis(cfg->brake_axis);
accel_axis = swdc_di_get_axis(cfg->accel_axis);
if (brake_axis == NULL) {
dprintf("Wheel: Invalid brake axis: %S\n", cfg->brake_axis);
return E_INVALIDARG;
}
if (accel_axis == NULL) {
dprintf("Wheel: Invalid accel axis: %S\n", cfg->accel_axis);
return E_INVALIDARG;
}
if (cfg->start > 32) {
dprintf("Wheel: Invalid start button: %i\n", cfg->start);
return E_INVALIDARG;
}
if (cfg->view_chg > 32) {
dprintf("Wheel: Invalid view change button: %i\n", cfg->view_chg);
return E_INVALIDARG;
}
if (cfg->paddle_left > 32) {
dprintf("Wheel: Invalid left paddle button: %i\n", cfg->paddle_left);
return E_INVALIDARG;
}
if (cfg->paddle_right > 32) {
dprintf("Wheel: Invalid right paddle button: %i\n", cfg->paddle_right);
return E_INVALIDARG;
}
if (cfg->wheel_green > 32) {
dprintf("Wheel: Invalid steering wheel green button: %i\n", cfg->wheel_green);
return E_INVALIDARG;
}
if (cfg->wheel_red > 32) {
dprintf("Wheel: Invalid steering wheel red button: %i\n", cfg->wheel_red);
return E_INVALIDARG;
}
if (cfg->wheel_blue > 32) {
dprintf("Wheel: Invalid steering wheel blue button: %i\n", cfg->wheel_blue);
return E_INVALIDARG;
}
if (cfg->wheel_yellow > 32) {
dprintf("Wheel: Invalid steering wheel yellow button: %i\n", cfg->wheel_yellow);
return E_INVALIDARG;
}
/* Print some debug output to make sure config works... */
dprintf("Wheel: --- Begin configuration ---\n");
dprintf("Wheel: Device name . . . . : Contains \"%S\"\n",
cfg->device_name);
if (cfg->pedals_name[0] == L'\0') {
dprintf("Wheel: Brake axis . . . . : %S\n", brake_axis->name);
dprintf("Wheel: Accel axis . . . . : %S\n", accel_axis->name);
}
dprintf("Wheel: Start button . . . . . : %i\n", cfg->start);
dprintf("Wheel: View Change button . . : %i\n", cfg->view_chg);
dprintf("Wheel: Paddle Left button . . : %i\n", cfg->paddle_left);
dprintf("Wheel: Paddle Right button . : %i\n", cfg->paddle_right);
dprintf("Wheel: Steering Green button : %i\n", cfg->wheel_green);
dprintf("Wheel: Steering Red button . : %i\n", cfg->wheel_red);
dprintf("Wheel: Steering Blue button . : %i\n", cfg->wheel_blue);
dprintf("Wheel: Steering Yellow button : %i\n", cfg->wheel_yellow);
dprintf("Wheel: Reverse Brake Axis . . : %i\n", cfg->reverse_brake_axis);
dprintf("Wheel: Reverse Accel Axis . . : %i\n", cfg->reverse_accel_axis);
dprintf("Wheel: --- End configuration ---\n");
if (cfg->pedals_name[0] != L'\0') {
dprintf("Pedals: --- Begin configuration ---\n");
dprintf("Pedals: Device name . . . : Contains \"%S\"\n",
cfg->pedals_name);
dprintf("Pedals: Brake axis . . . . : %S\n", brake_axis->name);
dprintf("Pedals: Accel axis . . . . : %S\n", accel_axis->name);
dprintf("Pedals: --- End configuration ---\n");
}
swdc_di_off_brake = brake_axis->off;
swdc_di_off_accel = accel_axis->off;
swdc_di_start = cfg->start;
swdc_di_view_chg = cfg->view_chg;
swdc_di_paddle_left = cfg->paddle_left;
swdc_di_paddle_right = cfg->paddle_right;
swdc_di_wheel_green = cfg->wheel_green;
swdc_di_wheel_red = cfg->wheel_red;
swdc_di_wheel_blue = cfg->wheel_blue;
swdc_di_wheel_yellow = cfg->wheel_yellow;
swdc_di_reverse_brake_axis = cfg->reverse_brake_axis;
swdc_di_reverse_accel_axis = cfg->reverse_accel_axis;
// FFB configuration
if (cfg->center_spring_strength < 0 || cfg->center_spring_strength > 100) {
dprintf("Wheel: Invalid center spring strength: %i\n", cfg->center_spring_strength);
return E_INVALIDARG;
}
swdc_di_center_spring_strength = cfg->center_spring_strength;
return S_OK;
}
static const struct swdc_di_axis *swdc_di_get_axis(const wchar_t *name)
{
const struct swdc_di_axis *axis;
size_t i;
for (i = 0 ; i < _countof(swdc_di_axes) ; i++) {
axis = &swdc_di_axes[i];
if (wstr_ieq(name, axis->name)) {
return axis;
}
}
return NULL;
}
static BOOL CALLBACK swdc_di_enum_callback(
const DIDEVICEINSTANCEW *dev,
void *ctx)
{
const struct swdc_di_config *cfg;
HRESULT hr;
cfg = ctx;
if (wcsstr(dev->tszProductName, cfg->device_name) == NULL) {
return DIENUM_CONTINUE;
}
dprintf("Wheel: Using DirectInput device \"%S\"\n", dev->tszProductName);
hr = IDirectInput8_CreateDevice(
swdc_di_api,
&dev->guidInstance,
&swdc_di_dev,
NULL);
if (FAILED(hr)) {
dprintf("Wheel: CreateDevice failed: %08x\n", (int) hr);
}
return DIENUM_STOP;
}
static BOOL CALLBACK swdc_di_enum_callback_pedals(
const DIDEVICEINSTANCEW *dev,
void *ctx)
{
const struct swdc_di_config *cfg;
HRESULT hr;
cfg = ctx;
if (wcsstr(dev->tszProductName, cfg->pedals_name) == NULL) {
return DIENUM_CONTINUE;
}
dprintf("Pedals: Using DirectInput device \"%S\"\n", dev->tszProductName);
hr = IDirectInput8_CreateDevice(
swdc_di_api,
&dev->guidInstance,
&swdc_di_pedals,
NULL);
if (FAILED(hr)) {
dprintf("Pedals: CreateDevice failed: %08x\n", (int) hr);
}
return DIENUM_STOP;
}
static void swdc_di_get_buttons(uint16_t *gamebtn_out)
{
union swdc_di_state state;
uint8_t gamebtn;
HRESULT hr;
assert(gamebtn_out != NULL);
hr = swdc_di_dev_poll(swdc_di_dev, swdc_di_wnd, &state);
if (FAILED(hr)) {
return;
}
gamebtn = swdc_di_decode_pov(state.st.rgdwPOV[0]);
if (swdc_di_start && state.st.rgbButtons[swdc_di_start - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_START;
}
if (swdc_di_view_chg && state.st.rgbButtons[swdc_di_view_chg - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_VIEW_CHANGE;
}
if (swdc_di_paddle_left && state.st.rgbButtons[swdc_di_paddle_left - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_PADDLE_LEFT;
}
if (swdc_di_paddle_right && state.st.rgbButtons[swdc_di_paddle_right - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_PADDLE_RIGHT;
}
if (swdc_di_wheel_green && state.st.rgbButtons[swdc_di_wheel_green - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_GREEN;
}
if (swdc_di_wheel_red && state.st.rgbButtons[swdc_di_wheel_red - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_RED;
}
if (swdc_di_wheel_blue && state.st.rgbButtons[swdc_di_wheel_blue - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_BLUE;
}
if (swdc_di_wheel_yellow && state.st.rgbButtons[swdc_di_wheel_yellow - 1]) {
gamebtn |= SWDC_IO_GAMEBTN_STEERING_YELLOW;
}
*gamebtn_out = gamebtn;
}
static uint8_t swdc_di_decode_pov(DWORD pov)
{
switch (pov) {
case 0: return SWDC_IO_GAMEBTN_UP;
case 4500: return SWDC_IO_GAMEBTN_UP | SWDC_IO_GAMEBTN_RIGHT;
case 9000: return SWDC_IO_GAMEBTN_RIGHT;
case 13500: return SWDC_IO_GAMEBTN_RIGHT | SWDC_IO_GAMEBTN_DOWN;
case 18000: return SWDC_IO_GAMEBTN_DOWN;
case 22500: return SWDC_IO_GAMEBTN_DOWN | SWDC_IO_GAMEBTN_LEFT;
case 27000: return SWDC_IO_GAMEBTN_LEFT;
case 31500: return SWDC_IO_GAMEBTN_LEFT | SWDC_IO_GAMEBTN_UP;
default: return 0;
}
}
static void swdc_di_get_analogs(struct swdc_io_analog_state *out)
{
union swdc_di_state state;
union swdc_di_state pedals_state;
const LONG *brake;
const LONG *accel;
HRESULT hr;
assert(out != NULL);
hr = swdc_di_dev_poll(swdc_di_dev, swdc_di_wnd, &state);
if (FAILED(hr)) {
return;
}
if (swdc_di_use_pedals) {
hr = swdc_di_dev_poll(swdc_di_pedals, swdc_di_wnd, &pedals_state);
if (FAILED(hr)) {
return;
}
brake = (LONG *) &pedals_state.bytes[swdc_di_off_brake];
accel = (LONG *) &pedals_state.bytes[swdc_di_off_accel];
} else {
brake = (LONG *) &state.bytes[swdc_di_off_brake];
accel = (LONG *) &state.bytes[swdc_di_off_accel];
}
out->wheel = state.st.lX - 32768;
if (swdc_di_reverse_brake_axis) {
out->brake = *brake;
} else {
out->brake = 65535 - *brake;
}
if (swdc_di_reverse_accel_axis) {
out->accel = *accel;
} else {
out->accel = 65535 - *accel;
}
}
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