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@@ -18,7 +18,6 @@
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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-
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#include "SDL_internal.h"
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#ifdef SDL_JOYSTICK_HIDAPI
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@@ -27,6 +26,158 @@
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#include "SDL_hidapijoystick_c.h"
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#include "SDL_hidapi_rumble.h"
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+/* ========================================================================= */
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+/* Win32 HID helper */
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+/* ========================================================================= */
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+
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+/* This helper requires full desktop Win32 HID APIs.
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+ * These APIs are NOT available on GDK platforms.
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+ */
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+#if defined(SDL_PLATFORM_WIN32) && !defined(SDL_PLATFORM_GDK)
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+#define SDL_HAS_WIN32_HID 1
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+#else
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+#define SDL_HAS_WIN32_HID 0
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+#endif
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+
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+#if SDL_HAS_WIN32_HID
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+
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+/* --- Win32 HID includes ------------------------------------------------- */
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+#include <windows.h>
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+#include <setupapi.h>
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+#include <hidsdi.h>
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+
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+#if defined(_MSC_VER)
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+#pragma comment(lib, "setupapi.lib")
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+#pragma comment(lib, "hid.lib")
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+#endif
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+
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+static char *FindHIDInterfacePath(Uint16 vid, Uint16 pid, int collection_index)
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+{
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+ GUID hidGuid;
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+ HidD_GetHidGuid(&hidGuid);
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+
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+ HDEVINFO deviceInfoSet = SetupDiGetClassDevs(
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+ &hidGuid, NULL, NULL,
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+ DIGCF_PRESENT | DIGCF_DEVICEINTERFACE
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+ );
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+ if (deviceInfoSet == INVALID_HANDLE_VALUE) {
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+ return NULL;
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+ }
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+
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+ SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
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+ deviceInterfaceData.cbSize = sizeof(deviceInterfaceData);
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+
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+ for (DWORD i = 0;
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+ SetupDiEnumDeviceInterfaces(deviceInfoSet, NULL, &hidGuid, i, &deviceInterfaceData);
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+ i++) {
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+
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+ DWORD requiredSize = 0;
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+ SetupDiGetDeviceInterfaceDetail(
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+ deviceInfoSet, &deviceInterfaceData,
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+ NULL, 0, &requiredSize, NULL
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+ );
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+
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+ PSP_DEVICE_INTERFACE_DETAIL_DATA deviceDetail =
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+ (PSP_DEVICE_INTERFACE_DETAIL_DATA)SDL_malloc(requiredSize);
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+ if (!deviceDetail) {
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+ continue;
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+ }
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+
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+ deviceDetail->cbSize = sizeof(*deviceDetail);
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+
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+ if (!SetupDiGetDeviceInterfaceDetail(
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+ deviceInfoSet, &deviceInterfaceData,
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+ deviceDetail, requiredSize, NULL, NULL)) {
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+ SDL_free(deviceDetail);
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+ continue;
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+ }
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+
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+ HANDLE hDevice = CreateFile(
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+ deviceDetail->DevicePath,
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+ GENERIC_READ | GENERIC_WRITE,
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+ FILE_SHARE_READ | FILE_SHARE_WRITE,
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+ NULL,
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+ OPEN_EXISTING,
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+ FILE_FLAG_OVERLAPPED,
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+ NULL
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+ );
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+
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+ if (hDevice == INVALID_HANDLE_VALUE) {
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+ SDL_free(deviceDetail);
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+ continue;
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+ }
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+
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+ HIDD_ATTRIBUTES attributes;
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+ attributes.Size = sizeof(attributes);
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+
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+ if (!HidD_GetAttributes(hDevice, &attributes) ||
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+ attributes.VendorID != vid ||
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+ attributes.ProductID != pid) {
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+ CloseHandle(hDevice);
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+ SDL_free(deviceDetail);
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+ continue;
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+ }
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+
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+ PHIDP_PREPARSED_DATA preparsedData = NULL;
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+ if (!HidD_GetPreparsedData(hDevice, &preparsedData) || !preparsedData) {
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+ CloseHandle(hDevice);
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+ SDL_free(deviceDetail);
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+ continue;
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+ }
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+
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+ HIDP_CAPS caps;
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+ if (HidP_GetCaps(preparsedData, &caps) != HIDP_STATUS_SUCCESS) {
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+ HidD_FreePreparsedData(preparsedData);
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+ CloseHandle(hDevice);
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+ SDL_free(deviceDetail);
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+ continue;
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+ }
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+
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+ if ((caps.InputReportByteLength == 64 && caps.OutputReportByteLength == 64) ||
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+ (caps.InputReportByteLength == 37 && caps.OutputReportByteLength == 37)) {
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+
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+ char col_str[16];
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+ SDL_snprintf(col_str, sizeof(col_str), "col%02d", collection_index);
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+
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+ if (SDL_strcasestr(deviceDetail->DevicePath, col_str)) {
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+ char *result = SDL_strdup(deviceDetail->DevicePath);
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+ HidD_FreePreparsedData(preparsedData);
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+ CloseHandle(hDevice);
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+ SDL_free(deviceDetail);
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+ SetupDiDestroyDeviceInfoList(deviceInfoSet);
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+ return result;
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+ }
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+ }
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+
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+ HidD_FreePreparsedData(preparsedData);
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+ CloseHandle(hDevice);
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+ SDL_free(deviceDetail);
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+ }
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+
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+ SetupDiDestroyDeviceInfoList(deviceInfoSet);
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+ return NULL;
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+}
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+
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+#else /* !SDL_HAS_WIN32_HID */
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+/* Stub for GDK / non-Win32 platforms */
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+
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+#if defined(__GNUC__) || defined(__clang__)
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+#define SDL_UNUSED_FUNC __attribute__((unused))
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+#else
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+#define SDL_UNUSED_FUNC
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+#endif
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+
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+static char *FindHIDInterfacePath(Uint16 vid, Uint16 pid, int collection_index) SDL_UNUSED_FUNC;
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+static char *FindHIDInterfacePath(Uint16 vid, Uint16 pid, int collection_index)
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+{
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+ (void)vid;
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+ (void)pid;
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+ (void)collection_index;
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+ return NULL;
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+}
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+
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+#endif /* SDL_HAS_WIN32_HID */
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+
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#ifdef SDL_JOYSTICK_HIDAPI_GAMESIR
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#define GAMESIR_PACKET_HEADER_0 0xA1
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@@ -175,109 +326,6 @@ static bool SendGameSirModeSwitch(SDL_HIDAPI_Device *device)
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return true;
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}
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-#if defined(SDL_PLATFORM_WIN32) || defined(SDL_PLATFORM_WINGDK)
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-#include <windows.h>
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-#include <setupapi.h>
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-#include <hidsdi.h>
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-#if defined(SDL_PLATFORM_WIN32) && defined(_MSC_VER)
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- #pragma comment(lib, "setupapi.lib")
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- #pragma comment(lib, "hid.lib")
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-#endif
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-
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-
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-static char *FindHIDInterfacePath(USHORT vid, USHORT pid, int collection_index ) {
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- GUID hidGuid;
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- HidD_GetHidGuid(&hidGuid);
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-
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- HDEVINFO deviceInfoSet = SetupDiGetClassDevs(&hidGuid, NULL, NULL, DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
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- if (deviceInfoSet == INVALID_HANDLE_VALUE) {
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- return NULL;
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- }
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-
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- SP_DEVICE_INTERFACE_DATA deviceInterfaceData;
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- deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
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-
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- for (DWORD i = 0; SetupDiEnumDeviceInterfaces(deviceInfoSet, NULL, &hidGuid, i, &deviceInterfaceData); i++) {
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- DWORD requiredSize = 0;
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- SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, NULL, 0, &requiredSize, NULL);
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-
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- PSP_DEVICE_INTERFACE_DETAIL_DATA deviceDetail = (PSP_DEVICE_INTERFACE_DETAIL_DATA)SDL_malloc(requiredSize);
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- if (!deviceDetail) continue;
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- deviceDetail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
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-
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- if (!SetupDiGetDeviceInterfaceDetail(deviceInfoSet, &deviceInterfaceData, deviceDetail, requiredSize, NULL, NULL)) {
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- SDL_free(deviceDetail);
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- continue;
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- }
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-
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-
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- HANDLE hDevice = CreateFile(deviceDetail->DevicePath,
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- GENERIC_READ | GENERIC_WRITE,
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- FILE_SHARE_READ | FILE_SHARE_WRITE,
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- NULL,
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- OPEN_EXISTING,
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- FILE_FLAG_OVERLAPPED,
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- NULL);
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-
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- if (hDevice == INVALID_HANDLE_VALUE) {
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- SDL_free(deviceDetail);
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- continue;
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- }
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-
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-
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- HIDD_ATTRIBUTES attributes;
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- attributes.Size = sizeof(attributes);
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- if (!HidD_GetAttributes(hDevice, &attributes) ||
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- attributes.VendorID != vid ||
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- attributes.ProductID != pid) {
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- CloseHandle(hDevice);
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- SDL_free(deviceDetail);
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- continue;
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- }
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-
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-
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- PHIDP_PREPARSED_DATA preparsedData = NULL;
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- if (!HidD_GetPreparsedData(hDevice, &preparsedData) || !preparsedData) {
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- CloseHandle(hDevice);
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- SDL_free(deviceDetail);
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- continue;
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- }
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-
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- HIDP_CAPS caps;
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- if (HidP_GetCaps(preparsedData, &caps) != HIDP_STATUS_SUCCESS) {
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- HidD_FreePreparsedData(preparsedData);
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- CloseHandle(hDevice);
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- SDL_free(deviceDetail);
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- continue;
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- }
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-
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-
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- if (caps.InputReportByteLength == 64 && caps.OutputReportByteLength == 64 ||
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- caps.InputReportByteLength == 37 && caps.OutputReportByteLength == 37) {
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-
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- char col_str[16];
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- snprintf(col_str, sizeof(col_str), "col%02d", collection_index);
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- if (SDL_strcasestr(deviceDetail->DevicePath, col_str)) {
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- char *result = SDL_strdup(deviceDetail->DevicePath);
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- HidD_FreePreparsedData(preparsedData);
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- CloseHandle(hDevice);
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- SDL_free(deviceDetail);
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- SetupDiDestroyDeviceInfoList(deviceInfoSet);
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- return result;
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- }
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- }
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-
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- HidD_FreePreparsedData(preparsedData);
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- CloseHandle(hDevice);
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- SDL_free(deviceDetail);
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- }
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-
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- SetupDiDestroyDeviceInfoList(deviceInfoSet);
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- return NULL;
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-}
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-#endif
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-
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-
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static bool HIDAPI_DriverGameSir_InitDevice(SDL_HIDAPI_Device *device)
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{
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Uint16 vendor_id = device->vendor_id;
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@@ -287,7 +335,7 @@ static bool HIDAPI_DriverGameSir_InitDevice(SDL_HIDAPI_Device *device)
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struct SDL_hid_device_info *devs = SDL_hid_enumerate(vendor_id, product_id);
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for (struct SDL_hid_device_info *info = devs; info; info = info->next) {
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if (info->interface_number == 0) {
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-#if defined(SDL_PLATFORM_WIN32) || defined(SDL_PLATFORM_WINGDK)
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+#if defined(SDL_PLATFORM_WIN32) || defined(SDL_PLATFORM_GDK)
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if (!output_handle) {
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char *col02_path = FindHIDInterfacePath(vendor_id, product_id, 2);
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if (col02_path) {
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@@ -412,14 +460,14 @@ static bool HIDAPI_DriverGameSir_OpenJoystick(SDL_HIDAPI_Device *device, SDL_Joy
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ctx->sensor_timestamp_step_ns = SDL_NS_PER_SECOND / 125;
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- // 加速度计缩放因子:假设范围为±2g,16位带符号值(-32768到32767)
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- // 32768对应2g,所以缩放因子 = 2 * SDL_STANDARD_GRAVITY / 32768.0f
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+ // Accelerometer scale factor: assume a range of ±2g, 16-bit signed values (-32768 to 32767)
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+ // 32768 corresponds to 2g, so the scale factor = 2 * SDL_STANDARD_GRAVITY / 32768.0f
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ctx->accelScale = 2.0f * SDL_STANDARD_GRAVITY / 32768.0f;
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- // 陀螺仪缩放因子:参考PS4的实现方式
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- // PS4使用 (gyro_numerator / gyro_denominator) * (π / 180)
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- // 默认值为 (1 / 16) * (π / 180),对应量程约为 ±2048 度/秒
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- // 这是游戏手柄陀螺仪的常见量程
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+ // Gyro scale factor: based on the PS4 implementation
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+ // PS4 uses (gyro_numerator / gyro_denominator) * (π / 180)
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+ // The default value is (1 / 16) * (π / 180), corresponding to a range of approximately ±2048 degrees/second
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+ // This is a common range for gamepad gyroscopes
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const float gyro_numerator = 1.0f;
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const float gyro_denominator = 16.0f;
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ctx->gyroScale = (gyro_numerator / gyro_denominator) * (SDL_PI_F / 180.0f);
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@@ -642,22 +690,19 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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return;
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}
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- // 检查数据包格式:可能包含报告ID(0x43)作为第一个字节
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- // 实际数据包格式:43 a1 c8 [按钮数据...]
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- // 如果第一个字节是0x43,第二个字节是0xa1,第三个字节是0xc8,则跳过报告ID
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- Uint8 *packet_data = data;
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+ // Check packet format: it may include a report ID (0x43) as the first byte
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+ // Actual packet format: 43 a1 c8 [button data...]
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+ // If the first byte is 0x43, the second is 0xA1 and the third is 0xC8, skip the report ID
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int packet_size = size;
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if (size >= 3 && data[0] == 0x43 && data[1] == GAMESIR_PACKET_HEADER_0 && data[2] == GAMESIR_PACKET_HEADER_1_GAMEPAD) {
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- // 数据包包含报告ID,跳过第一个字节
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- packet_data = data + 1;
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+ // Packet contains a report ID; skip the first byte
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packet_size = size - 1;
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} else if (size >= 2 && data[0] == GAMESIR_PACKET_HEADER_0 && data[1] == GAMESIR_PACKET_HEADER_1_GAMEPAD) {
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- // 标准格式:没有报告ID,直接是头部字节
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- packet_data = data;
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+ // Standard format: no report ID, header bytes directly
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packet_size = size;
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} else {
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- // 不匹配的数据包格式,直接返回
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+ // Packet format does not match; return immediately
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return;
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}
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@@ -671,8 +716,8 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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if (ctx->last_state[3] != data[3]) {
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Uint8 buttons = data[3];
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// BTN1: A B C X Y Z L1 R1
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- // 使用位运算检查每个按钮是否被按下
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- // buttons & BTN_A 会返回 BTN_A 的值(如果按下)或 0(如果未按下)
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+ // Use bitwise operations to check whether each button is pressed
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+ // buttons & BTN_A returns the value of BTN_A (if pressed) or 0 (if not pressed)
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_SOUTH, buttons & BTN_A);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_EAST, buttons & BTN_B);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_WEST, buttons & BTN_X);
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@@ -685,8 +730,8 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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if (ctx->last_state[4] != data[4]) {
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Uint8 buttons = data[4];
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// BTN2: L2 R2 SELECT START HOME L3 R3 CAPTURE
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- // 注意:L2/R2 作为数字按钮在 data[4] 中,但实际的模拟值在 data[15]/data[16] 中
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- // 这里只处理其他按钮,扳机轴的模拟值在后面的代码中处理
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+ // Note: L2/R2 appear as digital buttons in data[4], but their actual analog values are in data[15]/data[16].
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+ // Only handle the other buttons here; trigger analog values are processed later in the code.
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_BACK, buttons & BTN_SELECT);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_START, buttons & BTN_START);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_GUIDE, buttons & BTN_HOME);
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@@ -699,7 +744,7 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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if (ctx->last_state[5] != data[5]) {
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Uint8 buttons = data[5];
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// BTN3: UP DOWN LEFT RIGHT M MUTE L4 R4
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- // 处理方向键(十字键)
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+ // Handle the directional pad (D-pad)
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Uint8 hat = SDL_HAT_CENTERED;
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@@ -725,7 +770,7 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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SDL_SendJoystickHat(timestamp, joystick, 0, hat);
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- // 处理其他按钮
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+ // Handle other buttons
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_RIGHT_PADDLE1, buttons & BTN_L4);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_LEFT_PADDLE1, buttons & BTN_R4);
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SDL_SendJoystickButton(timestamp, joystick, SDL_GAMEPAD_BUTTON_MISC2, buttons & BTN_MUTE);
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@@ -746,27 +791,27 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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}
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if (is_initial_packet) {
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- // 初始化所有摇杆轴到中心位置
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+ // Initialize all joystick axes to center positions
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SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFTX, 0);
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SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFTY, 0);
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SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_RIGHTX, 0);
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SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_RIGHTY, 0);
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} else {
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- // 左摇杆处理
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- // 左摇杆:字节 7-10 (16位值)
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- // 字节 7-8: X轴 (Hi/Low组合成带符号16位值,例如0x7df6)
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- // 字节 9-10: Y轴 (Hi/Low组合成带符号16位值)
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+ // Left stick handling
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+ // Left stick: bytes 7-10 (16-bit values)
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+ // Bytes 7-8: X axis (Hi/Low combined into a signed 16-bit value, e.g. 0x7df6)
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+ // Bytes 9-10: Y axis (Hi/Low combined into a signed 16-bit value)
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if (size >= 11) {
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- // 组合字节7-8为16位值,例如:data[7]=0x7d, data[8]=0xf6 -> 0x7df6
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+ // Combine bytes 7-8 into a 16-bit value, e.g.: data[7]=0x7d, data[8]=0xf6 -> 0x7df6
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Uint16 raw_x_unsigned = ((Uint16)data[7] << 8) | data[8];
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Uint16 raw_y_unsigned = ((Uint16)data[9] << 8) | data[10];
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- // 将无符号16位值解释为带符号16位值
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+ // Interpret the unsigned 16-bit value as a signed 16-bit value
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Sint16 raw_x = (Sint16)raw_x_unsigned;
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Sint16 raw_y = (Sint16)raw_y_unsigned;
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Sint16 left_x, left_y;
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- // 直接使用带符号16位值,Y轴反转(SDL约定:向上为负值)
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+ // Use signed 16-bit values directly; invert Y-axis (SDL convention: up is negative)
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left_x = raw_x;
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left_y = -raw_y;
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@@ -782,7 +827,7 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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Sint16 last_left_x, last_left_y;
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last_left_x = last_raw_x;
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- last_left_y = -last_raw_y; // Y轴反转
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+ last_left_y = -last_raw_y; // invert Y axis
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Sint16 last_deadzone_x, last_deadzone_y;
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ApplyCircularDeadzone(last_left_x, last_left_y, &last_deadzone_x, &last_deadzone_y);
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@@ -794,22 +839,22 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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}
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}
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- // 右摇杆处理
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- // 右摇杆:字节 11-14 (16位值)
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- // 字节 11-12: X轴 (Hi/Low组合成带符号16位值)
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- // 字节 13-14: Y轴 (Hi/Low组合成带符号16位值)
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+ // Right stick handling
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+ // Right stick: bytes 11-14 (16-bit values)
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+ // Bytes 11-12: X axis (Hi/Low combined into a signed 16-bit value)
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+ // Bytes 13-14: Y axis (Hi/Low combined into a signed 16-bit value)
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if (size >= 15) {
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- // 组合字节11-12为16位值
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+ // Combine bytes 11-12 into a 16-bit value
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Uint16 raw_x_unsigned = ((Uint16)data[11] << 8) | data[12];
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- // 组合字节13-14为16位值
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+ // Combine bytes 13-14 into a 16-bit value
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Uint16 raw_y_unsigned = ((Uint16)data[13] << 8) | data[14];
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- // 将无符号16位值解释为带符号16位值
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+ // Interpret the unsigned 16-bit value as a signed 16-bit value
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Sint16 raw_x = (Sint16)raw_x_unsigned;
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Sint16 raw_y = (Sint16)raw_y_unsigned;
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Sint16 right_x, right_y;
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- // 直接使用带符号16位值,Y轴反转(SDL约定:向上为负值)
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+ // Use signed 16-bit values directly; invert Y-axis (SDL convention: up is negative)
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right_x = raw_x;
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right_y = -raw_y;
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@@ -825,7 +870,7 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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Sint16 last_right_x, last_right_y;
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last_right_x = last_raw_x;
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- last_right_y = -last_raw_y; // Y轴反转
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+ last_right_y = -last_raw_y; // invert Y axis
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Sint16 last_deadzone_x, last_deadzone_y;
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ApplyCircularDeadzone(last_right_x, last_right_y, &last_deadzone_x, &last_deadzone_y);
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@@ -837,11 +882,11 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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}
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}
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- // 处理扳机轴
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- // 协议:L2(15) - AXIS 左扳机模拟量 0-255,弹起0/按下255
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- // R2(16) - AXIS 右扳机模拟量 0-255,弹起0/按下255
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- // SDL 范围:0-32767(0=未按下,32767=完全按下)
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- // 线性映射:0-255 -> 0-32767
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+ // Handle trigger axes
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+ // Protocol: L2 (byte 15) - analog left trigger 0-255, 0 = released, 255 = pressed
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+ // R2 (byte 16) - analog right trigger 0-255, 0 = released, 255 = pressed
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+ // SDL range: 0-32767 (0 = released, 32767 = fully pressed)
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+ // Linear mapping: 0-255 -> 0-32767
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if (ctx->last_state[15] != data[15]) {
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axis = (Sint16)(((int)data[15] * 255) - 32767);
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SDL_SendJoystickAxis(timestamp, joystick, SDL_GAMEPAD_AXIS_LEFT_TRIGGER, axis);
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@@ -861,43 +906,44 @@ static void HIDAPI_DriverGameSir_HandleStatePacket(SDL_Joystick *joystick, SDL_D
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sensor_timestamp = ctx->sensor_timestamp_ns;
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ctx->sensor_timestamp_ns += ctx->sensor_timestamp_step_ns;
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- // 加速度计数据(字节 17-22)
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- // 字节 17-18: Acc X (Hi/Low组合成带符号16位值)
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- // 字节 19-20: Acc Y (Hi/Low组合成带符号16位值)
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- // 字节 21-22: Acc Z (Hi/Low组合成带符号16位值)
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+ // Accelerometer data (bytes 17-22)
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+ // Bytes 17-18: Acc X (Hi/Low combined into a signed 16-bit value)
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+ // Bytes 19-20: Acc Y (Hi/Low combined into a signed 16-bit value)
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+ // Bytes 21-22: Acc Z (Hi/Low combined into a signed 16-bit value)
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Uint16 acc_x_unsigned = ((Uint16)data[17] << 8) | data[18];
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Uint16 acc_y_unsigned = ((Uint16)data[19] << 8) | data[20];
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Uint16 acc_z_unsigned = ((Uint16)data[21] << 8) | data[22];
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- // 将无符号16位值转换为带符号16位值
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+ // Convert the unsigned 16-bit values to signed 16-bit values
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Sint16 acc_x = (Sint16)acc_x_unsigned;
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Sint16 acc_y = (Sint16)acc_y_unsigned;
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Sint16 acc_z = (Sint16)acc_z_unsigned;
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- // 应用缩放因子并转换为浮点数
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- // 坐标系与PS4一致,直接使用原始值,无符号反转
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+ // Apply scale factor and convert to floating point
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+ // Coordinate system matches PS4; use raw values directly without sign inversion
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values[0] = (float)acc_x * ctx->accelScale; // Acc X
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values[1] = (float)acc_y * ctx->accelScale; // Acc Y
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values[2] = (float)acc_z * ctx->accelScale; // Acc Z
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SDL_SendJoystickSensor(timestamp, joystick, SDL_SENSOR_ACCEL, sensor_timestamp, values, 3);
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- // 陀螺仪数据(字节 23-28)
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- // 字节 23-24: Gyro X (Hi/Low组合成带符号16位值)
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- // 字节 25-26: Gyro Y (Hi/Low组合成带符号16位值)
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- // 字节 27-28: Gyro Z (Hi/Low组合成带符号16位值)
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+ // Gyroscope data (bytes 23-28)
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+ // Bytes 23-24: Gyro X (Hi/Low combined into a signed 16-bit value)
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+ // Bytes 25-26: Gyro Y (Hi/Low combined into a signed 16-bit value)
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+ // Bytes 27-28: Gyro Z (Hi/Low combined into a signed 16-bit value)
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Uint16 gyro_x_unsigned = ((Uint16)data[23] << 8) | data[24];
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Uint16 gyro_y_unsigned = ((Uint16)data[25] << 8) | data[26];
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Uint16 gyro_z_unsigned = ((Uint16)data[27] << 8) | data[28];
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- // 将无符号16位值转换为带符号16位值
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+ // Convert the unsigned 16-bit values to signed 16-bit values
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Sint16 gyro_x = (Sint16)gyro_x_unsigned;
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Sint16 gyro_y = (Sint16)gyro_y_unsigned;
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Sint16 gyro_z = (Sint16)gyro_z_unsigned;
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- // 应用缩放因子并转换为浮点数(弧度/秒)
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- // 参考PS4的实现:使用 (gyro_numerator / gyro_denominator) * (π / 180)
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- // 默认配置对应量程约为 ±2048 度/秒,这是游戏手柄陀螺仪的常见量程
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- // 坐标系与PS4一致,直接使用原始值,无符号反转
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+ // Apply scale factor and convert to floating point (radians/second)
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+ // Based on the PS4 implementation: use (gyro_numerator / gyro_denominator) * (π / 180)
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+ // The default configuration corresponds to a range of approximately ±2048 degrees/second,
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+ // which is a common range for gamepad gyroscopes
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+ // Coordinate system matches the PS4; use raw values directly without sign inversion
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values[0] = (float)gyro_x * ctx->gyroScale; // Gyro X (Pitch)
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values[1] = (float)gyro_y * ctx->gyroScale; // Gyro Y (Yaw)
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values[2] = (float)gyro_z * ctx->gyroScale; // Gyro Z (Roll)
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@@ -966,7 +1012,7 @@ static bool HIDAPI_DriverGameSir_UpdateDevice(SDL_HIDAPI_Device *device)
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while ((size = SDL_hid_read_timeout(handle, data, sizeof(data), 0)) > 0) {
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if (joystick) {
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- // 取消注释以处理数据包
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+ // Uncomment to handle the packet
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HIDAPI_DriverGameSir_HandleStatePacket(joystick, ctx, data, size);
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}
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}
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