segatools/chusanhook/io4.c

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#include <windows.h>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include "board/io4.h"
#include "chusanhook/chuni-dll.h"
#include "util/dprintf.h"
struct chunithm_jvs_ir_mask {
uint16_t p1;
uint16_t p2;
};
// Incorrect IR beam mappings retained for backward compatibility
static const struct chunithm_jvs_ir_mask chunithm_jvs_ir_masks_v1[] = {
{ 0, 1 << 13 },
{ 1 << 13, 0 },
{ 0, 1 << 12 },
{ 1 << 12, 0 },
{ 0, 1 << 11 },
{ 1 << 11, 0 },
};
static const struct chunithm_jvs_ir_mask chunithm_jvs_ir_masks[] = {
{ 1 << 13, 0 },
{ 0, 1 << 13 },
{ 1 << 12, 0 },
{ 0, 1 << 12 },
{ 1 << 11, 0 },
{ 0, 1 << 11 },
};
static HRESULT chusan_io4_poll(void* ctx, struct io4_state* state);
static uint16_t coins;
static const struct io4_ops chusan_io4_ops = {
.poll = chusan_io4_poll,
};
HRESULT chusan_io4_hook_init(const struct io4_config* cfg)
{
HRESULT hr;
assert(chuni_dll.jvs_init != NULL);
dprintf("USB I/O: Starting IO backend\n");
hr = chuni_dll.jvs_init();
if (FAILED(hr)) {
dprintf("USB I/O: Backend error, I/O disconnected: %x\n", (int)hr);
return hr;
}
io4_hook_init(cfg, &chusan_io4_ops, NULL);
return S_OK;
}
static HRESULT chusan_io4_poll(void* ctx, struct io4_state* state)
{
const struct chunithm_jvs_ir_mask *masks;
uint8_t opbtn;
uint8_t beams;
size_t i;
memset(state, 0, sizeof(*state));
opbtn = 0;
beams = 0;
chuni_dll.jvs_poll(&opbtn, &beams);
chuni_dll.jvs_read_coin_counter(&coins);
if (chuni_dll.api_version >= 0x0101) {
// Use correct mapping
masks = chunithm_jvs_ir_masks;
} else {
// Use backwards-compatible incorrect mapping
masks = chunithm_jvs_ir_masks_v1;
}
if (opbtn & CHUNI_IO_OPBTN_TEST) {
state->buttons[0] |= IO4_BUTTON_TEST;
}
if (opbtn & CHUNI_IO_OPBTN_SERVICE) {
state->buttons[0] |= IO4_BUTTON_SERVICE;
}
// Update the coin counter with the value from jvs_read_coin_counter
state->chutes[0] = coins << 8;
for (i = 0; i < 6; i++) {
/* Beam "press" is active-low hence the ~ */
if (~beams & (1 << i)) {
state->buttons[0] |= masks[i].p1;
state->buttons[1] |= masks[i].p2;
}
}
return S_OK;
}