segatools/idzhook/jvs.c

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C
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#include <windows.h>
#include <xinput.h>
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#include <math.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include "amex/jvs.h"
#include "board/io3.h"
#include "idzhook/jvs.h"
#include "jvs/jvs-bus.h"
#include "util/dprintf.h"
static void idz_jvs_read_switches(void *ctx, struct io3_switch_state *out);
static uint16_t idz_jvs_read_analog(void *ctx, uint8_t analog_no);
static uint16_t idz_jvs_read_coin_counter(void *ctx, uint8_t slot_no);
static const struct io3_ops idz_jvs_io3_ops = {
.read_switches = idz_jvs_read_switches,
.read_analog = idz_jvs_read_analog,
.read_coin_counter = idz_jvs_read_coin_counter,
};
static struct io3 idz_jvs_io3;
static bool idz_jvs_coin;
static uint16_t idz_jvs_coins;
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static bool idz_jvs_shifting;
static uint8_t idz_jvs_gear;
static const uint16_t idz_jvs_gear_signals[] = {
/* Neutral */
0x0000,
/* 1: Left|Up */
0x2800,
/* 2: Left|Down */
0x1800,
/* 3: Up */
0x2000,
/* 4: Down */
0x1000,
/* 5: Right|Up */
0x2400,
/* 6: Right|Down */
0x1400,
};
void idz_jvs_init(void)
{
io3_init(&idz_jvs_io3, NULL, &idz_jvs_io3_ops, NULL);
jvs_attach(&idz_jvs_io3.jvs);
}
static void idz_jvs_read_switches(void *ctx, struct io3_switch_state *out)
{
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bool shift_inc;
bool shift_dec;
XINPUT_STATE xi;
WORD xb;
assert(out != NULL);
memset(&xi, 0, sizeof(xi));
XInputGetState(0, &xi);
xb = xi.Gamepad.wButtons;
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/* Update gameplay buttons */
if (xb & XINPUT_GAMEPAD_START) {
out->p1 |= 1 << 15;
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idz_jvs_gear = 0; /* Reset to Neutral when start is pressed */
}
if (xb & XINPUT_GAMEPAD_DPAD_UP) {
out->p1 |= 1 << 13;
}
if (xb & XINPUT_GAMEPAD_DPAD_DOWN) {
out->p1 |= 1 << 12;
}
if (xb & XINPUT_GAMEPAD_DPAD_LEFT) {
out->p1 |= 1 << 11;
}
if (xb & XINPUT_GAMEPAD_DPAD_RIGHT) {
out->p1 |= 1 << 10;
}
if (xb & XINPUT_GAMEPAD_BACK) {
out->p1 |= 1 << 9;
}
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/* Update simulated six-speed shifter */
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shift_inc = xb & (XINPUT_GAMEPAD_X | XINPUT_GAMEPAD_RIGHT_SHOULDER);
shift_dec = xb & (XINPUT_GAMEPAD_Y | XINPUT_GAMEPAD_LEFT_SHOULDER);
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if (!idz_jvs_shifting) {
if (shift_inc && idz_jvs_gear < 6) {
idz_jvs_gear++;
}
if (shift_dec && idz_jvs_gear > 0) {
idz_jvs_gear--;
}
}
idz_jvs_shifting = shift_inc || shift_dec;
out->p2 = idz_jvs_gear_signals[idz_jvs_gear];
/* Update test/service buttons */
if (GetAsyncKeyState('1')) {
out->system = 0x80;
} else {
out->system = 0;
}
if (GetAsyncKeyState('2')) {
out->p1 |= 1 << 14;
}
}
static uint16_t idz_jvs_read_analog(void *ctx, uint8_t analog_no)
{
XINPUT_STATE xi;
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int left;
int right;
if (analog_no > 2) {
return 0;
}
memset(&xi, 0, sizeof(xi));
XInputGetState(0, &xi);
switch (analog_no) {
case 0:
/* Wheel */
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left = xi.Gamepad.sThumbLX;
if (left < -XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
left += XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE;
} else if (left > XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE) {
left -= XINPUT_GAMEPAD_LEFT_THUMB_DEADZONE;
} else {
left = 0;
}
right = xi.Gamepad.sThumbRX;
if (right < -XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE) {
right += XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE;
} else if (right > XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE) {
right -= XINPUT_GAMEPAD_RIGHT_THUMB_DEADZONE;
} else {
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right = 0;
}
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return 0x8000 + (left + right) / 2;
case 1:
/* Accel */
return xi.Gamepad.bRightTrigger << 8;
case 2:
/* Brake */
return xi.Gamepad.bLeftTrigger << 8;
default:
return 0;
}
}
static uint16_t idz_jvs_read_coin_counter(void *ctx, uint8_t slot_no)
{
if (slot_no > 0) {
return 0;
}
if (GetAsyncKeyState('3')) {
if (!idz_jvs_coin) {
dprintf("IDZero JVS: Coin drop\n");
idz_jvs_coin = true;
idz_jvs_coins++;
}
} else {
idz_jvs_coin = false;
}
return idz_jvs_coins;
}