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segatools/idacio/di.c

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#include <windows.h>
#include <dinput.h>
#include <stddef.h>
#include <stdint.h>
#include <wchar.h>
#include "idacio/backend.h"
#include "idacio/config.h"
#include "idacio/di.h"
#include "idacio/di-dev.h"
#include "idacio/idacio.h"
#include "idacio/shifter.h"
#include "idacio/wnd.h"
#include "util/dprintf.h"
#include "util/str.h"
struct idac_di_axis {
wchar_t name[4];
size_t off;
};
static HRESULT idac_di_config_apply(const struct idac_di_config *cfg);
static const struct idac_di_axis *idac_di_get_axis(const wchar_t *name);
static BOOL CALLBACK idac_di_enum_callback(
const DIDEVICEINSTANCEW *dev,
void *ctx);
static BOOL CALLBACK idac_di_enum_callback_pedals(
const DIDEVICEINSTANCEW *dev,
void *ctx);
static BOOL CALLBACK idac_di_enum_callback_shifter(
const DIDEVICEINSTANCEW *dev,
void *ctx);
static void idac_di_get_buttons(uint8_t *gamebtn_out);
static uint8_t idac_di_decode_pov(DWORD pov);
static void idac_di_get_shifter(uint8_t *gear);
static void idac_di_get_shifter_pos(uint8_t *gear);
static void idac_di_get_shifter_virt(uint8_t *gear);
static void idac_di_get_analogs(struct idac_io_analog_state *out);
static const struct idac_di_axis idac_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 idac_io_backend idac_di_backend = {
.get_gamebtns = idac_di_get_buttons,
.get_shifter = idac_di_get_shifter,
.get_analogs = idac_di_get_analogs,
};
static HWND idac_di_wnd;
static IDirectInput8W *idac_di_api;
static IDirectInputDevice8W *idac_di_dev;
static IDirectInputDevice8W *idac_di_pedals;
static IDirectInputDevice8W *idac_di_shifter;
static IDirectInputEffect *idac_di_fx;
static size_t idac_di_off_brake;
static size_t idac_di_off_accel;
static uint8_t idac_di_shift_dn;
static uint8_t idac_di_shift_up;
static uint8_t idac_di_view_chg;
static uint8_t idac_di_start;
static uint8_t idac_di_left;
static uint8_t idac_di_right;
static uint8_t idac_di_gear[6];
static bool idac_di_use_pedals;
static bool idac_di_reverse_brake_axis;
static bool idac_di_reverse_accel_axis;
static uint16_t idac_di_center_spring_strength;
HRESULT idac_di_init(
const struct idac_di_config *cfg,
HINSTANCE inst,
const struct idac_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 = idac_di_config_apply(cfg);
if (FAILED(hr)) {
return hr;
}
hr = idac_io_wnd_create(inst, &idac_di_wnd);
if (FAILED(hr)) {
return hr;
}
/* Initial D Zero has some built-in DirectInput support that is not
particularly useful. idachook shorts this out by redirecting dinput8.dll
to a no-op implementation of DirectInput. However, idacio 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 **) &idac_di_api,
NULL);
if (FAILED(hr)) {
dprintf("DirectInput: API create failed: %08x\n", (int) hr);
return hr;
}
hr = IDirectInput8_EnumDevices(
idac_di_api,
DI8DEVCLASS_GAMECTRL,
idac_di_enum_callback,
(void *) cfg,
DIEDFL_ATTACHEDONLY);
if (FAILED(hr)) {
dprintf("DirectInput: EnumDevices failed: %08x\n", (int) hr);
return hr;
}
if (idac_di_dev == NULL) {
dprintf("Wheel: Controller not found\n");
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
}
hr = idac_di_dev_start(idac_di_dev, idac_di_wnd);
if (FAILED(hr)) {
return hr;
}
// Convert the strength from 0-100 to 0-10000 for DirectInput
idac_di_dev_start_fx(idac_di_dev, &idac_di_fx,
idac_di_center_spring_strength * 100);
if (cfg->pedals_name[0] != L'\0') {
hr = IDirectInput8_EnumDevices(
idac_di_api,
DI8DEVCLASS_GAMECTRL,
idac_di_enum_callback_pedals,
(void *) cfg,
DIEDFL_ATTACHEDONLY);
if (FAILED(hr)) {
dprintf("DirectInput: EnumDevices failed: %08x\n", (int) hr);
return hr;
}
if (idac_di_dev == NULL) {
dprintf("Pedals: Controller not found\n");
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
}
hr = idac_di_dev_start(idac_di_pedals, idac_di_wnd);
if (FAILED(hr)) {
return hr;
}
idac_di_use_pedals = true;
} else {
idac_di_use_pedals = false;
}
if (cfg->shifter_name[0] != L'\0') {
hr = IDirectInput8_EnumDevices(
idac_di_api,
DI8DEVCLASS_GAMECTRL,
idac_di_enum_callback_shifter,
(void *) cfg,
DIEDFL_ATTACHEDONLY);
if (FAILED(hr)) {
dprintf("DirectInput: EnumDevices failed: %08x\n", (int) hr);
return hr;
}
if (idac_di_dev == NULL) {
dprintf("Shifter: Controller not found\n");
return HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND);
}
hr = idac_di_dev_start(idac_di_shifter, idac_di_wnd);
if (FAILED(hr)) {
return hr;
}
}
dprintf("DirectInput: Controller initialized\n");
*backend = &idac_di_backend;
return S_OK;
}
static HRESULT idac_di_config_apply(const struct idac_di_config *cfg)
{
const struct idac_di_axis *brake_axis;
const struct idac_di_axis *accel_axis;
int i;
brake_axis = idac_di_get_axis(cfg->brake_axis);
accel_axis = idac_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->left > 32) {
dprintf("Wheel: Invalid left button: %i\n", cfg->left);
return E_INVALIDARG;
}
if (cfg->right > 32) {
dprintf("Wheel: Invalid right button: %i\n", cfg->right);
return E_INVALIDARG;
}
if (cfg->shift_dn > 32) {
dprintf("Wheel: Invalid shift down button: %i\n", cfg->shift_dn);
return E_INVALIDARG;
}
if (cfg->shift_up > 32) {
dprintf("Wheel: Invalid shift up button: %i\n", cfg->shift_up);
return E_INVALIDARG;
}
for (i = 0 ; i < 6 ; i++) {
if (cfg->gear[i] > 32) {
dprintf("Shifter: Invalid gear %i button: %i\n",
i + 1,
cfg->gear[i]);
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: Left button . . . . : %i\n", cfg->left);
dprintf("Wheel: Right button . . . : %i\n", cfg->right);
dprintf("Wheel: Shift Down button . : %i\n", cfg->shift_dn);
dprintf("Wheel: Shift Up button . . : %i\n", cfg->shift_up);
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");
}
if (cfg->shifter_name[0] != L'\0') {
dprintf("Shifter: --- Begin configuration ---\n");
dprintf("Shifter: Device name . . . : Contains \"%S\"\n",
cfg->shifter_name);
dprintf("Shifter: Gear buttons . . : %i %i %i %i %i %i\n",
cfg->gear[0],
cfg->gear[1],
cfg->gear[2],
cfg->gear[3],
cfg->gear[4],
cfg->gear[5]);
dprintf("Shifter: --- End configuration ---\n");
}
idac_di_off_brake = brake_axis->off;
idac_di_off_accel = accel_axis->off;
idac_di_start = cfg->start;
idac_di_view_chg = cfg->view_chg;
idac_di_left = cfg->left;
idac_di_right = cfg->right;
idac_di_shift_dn = cfg->shift_dn;
idac_di_shift_up = cfg->shift_up;
idac_di_reverse_brake_axis = cfg->reverse_brake_axis;
idac_di_reverse_accel_axis = cfg->reverse_accel_axis;
for (i = 0 ; i < 6 ; i++) {
idac_di_gear[i] = cfg->gear[i];
}
// 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;
}
idac_di_center_spring_strength = cfg->center_spring_strength;
return S_OK;
}
static const struct idac_di_axis *idac_di_get_axis(const wchar_t *name)
{
const struct idac_di_axis *axis;
size_t i;
for (i = 0 ; i < _countof(idac_di_axes) ; i++) {
axis = &idac_di_axes[i];
if (wstr_ieq(name, axis->name)) {
return axis;
}
}
return NULL;
}
static BOOL CALLBACK idac_di_enum_callback(
const DIDEVICEINSTANCEW *dev,
void *ctx)
{
const struct idac_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(
idac_di_api,
&dev->guidInstance,
&idac_di_dev,
NULL);
if (FAILED(hr)) {
dprintf("Wheel: CreateDevice failed: %08x\n", (int) hr);
}
return DIENUM_STOP;
}
static BOOL CALLBACK idac_di_enum_callback_pedals(
const DIDEVICEINSTANCEW *dev,
void *ctx)
{
const struct idac_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(
idac_di_api,
&dev->guidInstance,
&idac_di_pedals,
NULL);
if (FAILED(hr)) {
dprintf("Pedals: CreateDevice failed: %08x\n", (int) hr);
}
return DIENUM_STOP;
}
static BOOL CALLBACK idac_di_enum_callback_shifter(
const DIDEVICEINSTANCEW *dev,
void *ctx)
{
const struct idac_di_config *cfg;
HRESULT hr;
cfg = ctx;
if (wcsstr(dev->tszProductName, cfg->shifter_name) == NULL) {
return DIENUM_CONTINUE;
}
dprintf("Shifter: Using DirectInput device \"%S\"\n", dev->tszProductName);
hr = IDirectInput8_CreateDevice(
idac_di_api,
&dev->guidInstance,
&idac_di_shifter,
NULL);
if (FAILED(hr)) {
dprintf("Shifter: CreateDevice failed: %08x\n", (int) hr);
}
return DIENUM_STOP;
}
static void idac_di_get_buttons(uint8_t *gamebtn_out)
{
union idac_di_state state;
uint8_t gamebtn;
HRESULT hr;
assert(gamebtn_out != NULL);
hr = idac_di_dev_poll(idac_di_dev, idac_di_wnd, &state);
if (FAILED(hr)) {
return;
}
gamebtn = idac_di_decode_pov(state.st.rgdwPOV[0]);
if (idac_di_start && state.st.rgbButtons[idac_di_start - 1]) {
gamebtn |= IDAC_IO_GAMEBTN_START;
}
if (idac_di_view_chg && state.st.rgbButtons[idac_di_view_chg - 1]) {
gamebtn |= IDAC_IO_GAMEBTN_VIEW_CHANGE;
}
if (idac_di_left && state.st.rgbButtons[idac_di_left - 1]) {
gamebtn |= IDAC_IO_GAMEBTN_LEFT;
}
if (idac_di_right && state.st.rgbButtons[idac_di_right - 1]) {
gamebtn |= IDAC_IO_GAMEBTN_RIGHT;
}
*gamebtn_out = gamebtn;
}
static uint8_t idac_di_decode_pov(DWORD pov)
{
switch (pov) {
case 0: return IDAC_IO_GAMEBTN_UP;
case 4500: return IDAC_IO_GAMEBTN_UP | IDAC_IO_GAMEBTN_RIGHT;
case 9000: return IDAC_IO_GAMEBTN_RIGHT;
case 13500: return IDAC_IO_GAMEBTN_RIGHT | IDAC_IO_GAMEBTN_DOWN;
case 18000: return IDAC_IO_GAMEBTN_DOWN;
case 22500: return IDAC_IO_GAMEBTN_DOWN | IDAC_IO_GAMEBTN_LEFT;
case 27000: return IDAC_IO_GAMEBTN_LEFT;
case 31500: return IDAC_IO_GAMEBTN_LEFT | IDAC_IO_GAMEBTN_UP;
default: return 0;
}
}
static void idac_di_get_shifter(uint8_t *gear)
{
assert(gear != NULL);
if (idac_di_shifter != NULL) {
idac_di_get_shifter_pos(gear);
} else {
idac_di_get_shifter_virt(gear);
}
}
static void idac_di_get_shifter_pos(uint8_t *out)
{
union idac_di_state state;
uint8_t btn_no;
uint8_t gear;
uint8_t i;
HRESULT hr;
assert(out != NULL);
assert(idac_di_shifter != NULL);
hr = idac_di_dev_poll(idac_di_shifter, idac_di_wnd, &state);
if (FAILED(hr)) {
return;
}
gear = 0;
for (i = 0 ; i < 6 ; i++) {
btn_no = idac_di_gear[i];
if (btn_no && state.st.rgbButtons[btn_no - 1]) {
gear = i + 1;
}
}
*out = gear;
}
static void idac_di_get_shifter_virt(uint8_t *gear)
{
union idac_di_state state;
bool shift_dn;
bool shift_up;
HRESULT hr;
assert(gear != NULL);
hr = idac_di_dev_poll(idac_di_dev, idac_di_wnd, &state);
if (FAILED(hr)) {
return;
}
if (idac_di_shift_dn) {
shift_dn = state.st.rgbButtons[idac_di_shift_dn - 1];
} else {
shift_dn = false;
}
if (idac_di_shift_up) {
shift_up = state.st.rgbButtons[idac_di_shift_up - 1];
} else {
shift_up = false;
}
idac_shifter_update(shift_dn, shift_up);
*gear = idac_shifter_current_gear();
}
static void idac_di_get_analogs(struct idac_io_analog_state *out)
{
union idac_di_state state;
union idac_di_state pedals_state;
const LONG *brake;
const LONG *accel;
HRESULT hr;
assert(out != NULL);
hr = idac_di_dev_poll(idac_di_dev, idac_di_wnd, &state);
if (FAILED(hr)) {
return;
}
if (idac_di_use_pedals) {
hr = idac_di_dev_poll(idac_di_pedals, idac_di_wnd, &pedals_state);
if (FAILED(hr)) {
return;
}
brake = (LONG *) &pedals_state.bytes[idac_di_off_brake];
accel = (LONG *) &pedals_state.bytes[idac_di_off_accel];
} else {
brake = (LONG *) &state.bytes[idac_di_off_brake];
accel = (LONG *) &state.bytes[idac_di_off_accel];
}
out->wheel = state.st.lX - 32768;
if (idac_di_reverse_brake_axis) {
out->brake = *brake;
} else {
out->brake = 65535 - *brake;
}
if (idac_di_reverse_accel_axis) {
out->accel = *accel;
} else {
out->accel = 65535 - *accel;
}
}
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