added touch emulator

mercuryhook/touch.c

@@ -0,0 +1,164 @@
+#include <windows.h>
+
+#include <assert.h>
+#include <process.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include "board/slider-cmd.h"
+#include "board/slider-frame.h"
+
+#include "mercuryhook/mercury-dll.h"
+#include "mercuryhook/touch.h"
+
+#include "hook/iobuf.h"
+#include "hook/iohook.h"
+
+#include "hooklib/uart.h"
+
+#include "util/dprintf.h"
+#include "util/dump.h"
+
+static HRESULT touch0_handle_irp(struct irp *irp);
+static HRESULT touch0_handle_irp_locked(struct irp *irp);
+
+static HRESULT touch_req_dispatch(const union slider_req_any *req);
+
+static void touch_res_auto_scan(const uint8_t *state);
+
+static CRITICAL_SECTION touch0_lock;
+static struct uart touch0_uart;
+static uint8_t touch0_written_bytes[520];
+static uint8_t touch0_readable_bytes[520];
+
+static CRITICAL_SECTION touch1_lock;
+static struct uart touch1_uart;
+static uint8_t touch1_written_bytes[520];
+static uint8_t touch1_readable_bytes[520];
+
+HRESULT touch_hook_init(const struct touch_config *cfg)
+{    
+    assert(cfg != NULL);
+    assert(mercury_dll.touch_init != NULL);    
+
+    // not sure why this always returns false...
+    /*if (!cfg->enable) {
+        return S_FALSE;
+    }*/
+
+    InitializeCriticalSection(&touch0_lock);
+    InitializeCriticalSection(&touch1_lock);
+    dprintf("Wacca touch: init\n");
+
+    uart_init(&touch0_uart, 3);
+    touch0_uart.written.bytes = touch0_written_bytes;
+    touch0_uart.written.nbytes = sizeof(touch0_written_bytes);
+    touch0_uart.readable.bytes = touch0_readable_bytes;
+    touch0_uart.readable.nbytes = sizeof(touch0_readable_bytes);
+
+    uart_init(&touch1_uart, 4);
+    touch1_uart.written.bytes = touch1_written_bytes;
+    touch1_uart.written.nbytes = sizeof(touch1_written_bytes);
+    touch1_uart.readable.bytes = touch1_readable_bytes;
+    touch1_uart.readable.nbytes = sizeof(touch1_readable_bytes);
+
+    return iohook_push_handler(touch0_handle_irp);
+}
+
+static HRESULT touch0_handle_irp(struct irp *irp)
+{
+    HRESULT hr;
+
+    assert(irp != NULL);
+
+    if (!uart_match_irp(&touch0_uart, irp)) {
+        return iohook_invoke_next(irp);
+    }
+
+    EnterCriticalSection(&touch0_lock);
+    hr = touch0_handle_irp_locked(irp);
+    LeaveCriticalSection(&touch0_lock);
+
+    return hr;
+}
+
+static HRESULT touch0_handle_irp_locked(struct irp *irp)
+{
+    union slider_req_any req;
+    struct iobuf req_iobuf;
+    HRESULT hr;
+
+    if (irp->op == IRP_OP_OPEN) {
+        dprintf("Wacca touch: Starting backend\n");
+        hr = mercury_dll.touch_init();
+
+        if (FAILED(hr)) {
+            dprintf("Wacca touch: Backend error: %x\n", (int) hr);
+
+            return hr;
+        }
+    }
+
+    hr = uart_handle_irp(&touch0_uart, irp);
+
+    if (FAILED(hr) || irp->op != IRP_OP_WRITE) {
+        return hr;
+    }
+
+    for (;;) {
+#if 0
+        dprintf("TX Buffer:\n");
+        dump_iobuf(&touch0_uart.written);
+#endif
+
+        req_iobuf.bytes = req.bytes;
+        req_iobuf.nbytes = sizeof(req.bytes);
+        req_iobuf.pos = 0;
+
+        hr = slider_frame_decode(&req_iobuf, &touch0_uart.written);
+
+        if (hr != S_OK) {
+            if (FAILED(hr)) {
+                dprintf("Wacca touch: Deframe error: %x\n", (int) hr);
+            }
+
+            return hr;
+        }
+
+#if 0
+        dprintf("Deframe Buffer:\n");
+        dump_iobuf(&req_iobuf);
+#endif
+
+        hr = touch_req_dispatch(&req);
+
+        if (FAILED(hr)) {
+            dprintf("Wacca touch: Processing error: %x\n", (int) hr);
+        }
+    }
+}
+
+static HRESULT touch_req_dispatch(const union slider_req_any *req)
+{
+    switch (req->hdr.cmd) {
+    default:
+        dprintf("Unhandled command %02x\n", req->hdr.cmd);
+
+        return S_OK;
+    }
+}
+
+static void slider_res_auto_scan(const uint8_t *state)
+{
+    struct slider_resp_auto_scan resp;
+
+    resp.hdr.sync = SLIDER_FRAME_SYNC;
+    resp.hdr.cmd = SLIDER_CMD_AUTO_SCAN;
+    resp.hdr.nbytes = sizeof(resp.pressure);
+    memcpy(resp.pressure, state, sizeof(resp.pressure));
+
+    EnterCriticalSection(&touch0_lock);
+    slider_frame_encode(&touch0_uart.readable, &resp, sizeof(resp));
+    LeaveCriticalSection(&touch0_lock);
+}