segatools/carolhook/touch.c

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#include <windows.h>
#include <assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <string.h>
#include "carolhook/carol-dll.h"
#include "carolhook/touch.h"
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#include "hook/table.h"
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#include "hooklib/uart.h"
#include "util/dprintf.h"
#include "util/dump.h"
/**
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* CMDS for touch thing
* CX -> Calibrate Extend, preform callibration
* MS -> Mode Stream, enters stream mode
* R -> Reset, resets the device
* RD -> Reset Default, Resets the device to factory
* Z -> Null, keepalive command
* NM -> Name, return the name of the device (not documented?)
* OI -> Output Identity, output unique device identity, SC followed by 4 characters
* UT -> Unit Type, returns controller unit type + status
*/
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static HRESULT touch_handle_irp(struct irp *irp);
static HRESULT touch_handle_irp_locked(struct irp *irp);
static HRESULT touch_frame_decode(struct touch_req *dest, struct iobuf *iobuf);
static HRESULT handle_touch_ack_cmd(const struct touch_req *req);
static HRESULT handle_touch_name_cmd(const struct touch_req *req);
static HRESULT handle_touch_id_cmd(const struct touch_req *req);
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static HRESULT handle_touch_unit_type_cmd(const struct touch_req *req);
static void touch_scan_auto(const bool is_pressed, const uint16_t mouse_x, const uint16_t mouse_y);
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static CRITICAL_SECTION touch_lock;
static struct uart touch_uart;
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static uint8_t touch_written_bytes[528];
static uint8_t touch_readable_bytes[528];
static bool should_stream = false;
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static bool last_pressed;
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static uint8_t last_x1;
static uint8_t last_x2;
static uint8_t last_y1;
static uint8_t last_y2;
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HRESULT touch_hook_init(const struct touch_config *cfg)
{
if (!cfg->enable) {
return S_OK;
}
InitializeCriticalSection(&touch_lock);
uart_init(&touch_uart, 1);
touch_uart.written.bytes = touch_written_bytes;
touch_uart.written.nbytes = sizeof(touch_written_bytes);
touch_uart.readable.bytes = touch_readable_bytes;
touch_uart.readable.nbytes = sizeof(touch_readable_bytes);
dprintf("Touchscreen: Init\n");
return iohook_push_handler(touch_handle_irp);
return S_OK;
}
static HRESULT touch_handle_irp(struct irp *irp)
{
HRESULT hr;
assert(irp != NULL);
if (!uart_match_irp(&touch_uart, irp)) {
return iohook_invoke_next(irp);
}
EnterCriticalSection(&touch_lock);
hr = touch_handle_irp_locked(irp);
LeaveCriticalSection(&touch_lock);
return hr;
}
static HRESULT touch_handle_irp_locked(struct irp *irp)
{
struct touch_req req;
HRESULT hr;
assert(carol_dll.touch_init != NULL);
if (irp->op == IRP_OP_OPEN) {
dprintf("Touchscreen: Starting backend DLL\n");
hr = carol_dll.touch_init();
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carol_dll.touch_start(touch_scan_auto);
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if (FAILED(hr)) {
dprintf("Touchscreen: Backend DLL error: %X\n", (int) hr);
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return hr;
}
}
hr = uart_handle_irp(&touch_uart, irp);
if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
return hr;
}
for (;;) {
#if 0
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dprintf("Touchscreen: TX Buffer:\n");
dump_iobuf(&touch_uart.written);
#endif
hr = touch_frame_decode(&req, &touch_uart.written);
if (FAILED(hr)) {
dprintf("Touchscreen: Deframe Error: %X\n", (int) hr);
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return hr;
}
if (!strcmp("Z", (char *)req.cmd)) {
hr = handle_touch_ack_cmd(&req);
}
else if (!strcmp("OI", (char *)req.cmd)) {
hr = handle_touch_id_cmd(&req);
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}
else if (!strcmp("UT", (char *)req.cmd)) {
hr = handle_touch_unit_type_cmd(&req);
}
else if (!strcmp("NM", (char *)req.cmd)) {
hr = handle_touch_name_cmd(&req);
}
else if (!strcmp("R", (char *)req.cmd)) {
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carol_dll.touch_stop();
dprintf("Touch: Reset\n");
hr = handle_touch_ack_cmd(&req);
}
else {
dprintf("Touchscreen: Unhandled cmd %s\n", (char *)req.cmd);
hr = handle_touch_ack_cmd(&req);
}
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return hr;
}
}
static HRESULT handle_touch_ack_cmd(const struct touch_req *req)
{
return iobuf_write(&touch_uart.readable, "\0010\015", 3);
}
static HRESULT handle_touch_name_cmd(const struct touch_req *req)
{
dprintf("Touch: Get Name\n");
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return iobuf_write(&touch_uart.readable, "\001AD1000\015", 15);
}
static HRESULT handle_touch_id_cmd(const struct touch_req *req)
{
dprintf("Touch: Get ID\n");
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return iobuf_write(&touch_uart.readable, "\001AD1000\015", 8);
}
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static HRESULT handle_touch_unit_type_cmd(const struct touch_req *req)
{
dprintf("Touch: Get Unit Type\n");
return iobuf_write(&touch_uart.readable, "\001AD****00\015", 8);
}
static void touch_scan_auto(const bool is_pressed, const uint16_t mouse_x, const uint16_t mouse_y)
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{
struct touch_auto_resp resp;
uint16_t tmp_x;
uint16_t tmp_y;
bool flg = false;
memset(&resp, 0, sizeof(resp));
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resp.touches[0].status |= 1 << 7;
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if (is_pressed) {
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resp.touches[0].status |= (1 << 7) | (1 << 6);
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resp.touches[0].touch_id = 1;
tmp_x = mouse_x & 0x7FFF;
tmp_y = mouse_y & 0x7FFF;
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resp.touches[0].x1 = tmp_x & 0x7F;
resp.touches[0].x2 = (tmp_x >> 7) & 0x7F;
resp.touches[0].y1 = tmp_y & 0x7F;
resp.touches[0].y2 = (tmp_y >> 7) & 0x7F;
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flg = resp.touches[0].x1 != last_x1 || resp.touches[0].x2 != last_x2 || resp.touches[0].y1 != last_y1 || resp.touches[0].y2 != last_y2;
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#if 1
if (flg)
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dprintf("Touch: Mouse down! x %02X %02X y: %02X %02X\n", resp.touches[0].x1, resp.touches[0].x2, resp.touches[0].y1, resp.touches[0].y2);
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#endif
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last_x1 = resp.touches[0].x1;
last_x2 = resp.touches[0].x2;
last_y1 = resp.touches[0].y1;
last_y2 = resp.touches[0].y2;
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} else if (last_pressed) {
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resp.touches[0].x1 = last_x1;
resp.touches[0].x2 = last_x2;
resp.touches[0].y1 = last_y1;
resp.touches[0].y2 = last_y2;
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}
last_pressed = is_pressed;
EnterCriticalSection(&touch_lock);
iobuf_write(&touch_uart.readable, &resp, sizeof(resp));
LeaveCriticalSection(&touch_lock);
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#if 0
dprintf("Touch: RX Buffer: (pos %08x)\n", (uint32_t)touch_uart.readable.pos);
dump_iobuf(&touch_uart.readable);
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#endif
}
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/* Decodes the response into a struct that's easier to work with. */
static HRESULT touch_frame_decode(struct touch_req *dest, struct iobuf *iobuf)
{
dest->sync = iobuf->bytes[0];
memset(dest->cmd, 0, sizeof(dest->cmd));
size_t data_len = 0;
for (int i = 1; i < 255; i++) {
if (iobuf->bytes[i] == 0x0D) { break; }
dest->cmd[i - 1] = iobuf->bytes[i];
data_len++;
}
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dest->tail = iobuf->bytes[data_len + 1];
dest->data_len = data_len;
iobuf->pos = 0;
if (dest->sync != 1 || dest->tail != 0x0D) {
dprintf("Touch: Data recieve error, sync: 0x%02X (expected 0x01) tail: 0x%02X (expected 0x0D)", dest->sync, dest->tail);
return E_FAIL;
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}
return S_OK;
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}