xinput1_3: Only write haptics waveform reports when needed.

dlls/xinput1_3/main.c

@@ -286,11 +286,14 @@ static DWORD HID_set_state(struct xinput_controller *controller, XINPUT_VIBRATIO
     PHIDP_PREPARSED_DATA preparsed = controller->hid.preparsed;
     char *report_buf = controller->hid.output_report_buf;
     BYTE report_id = controller->hid.haptics_report;
+    BOOL update_rumble, update_buzz;
     NTSTATUS status;
 
     if (!(controller->caps.Flags & XINPUT_CAPS_FFB_SUPPORTED)) return ERROR_SUCCESS;
 
+    update_rumble = (controller->vibration.wLeftMotorSpeed != state->wLeftMotorSpeed);
     controller->vibration.wLeftMotorSpeed = state->wLeftMotorSpeed;
+    update_buzz = (controller->vibration.wRightMotorSpeed != state->wRightMotorSpeed);
     controller->vibration.wRightMotorSpeed = state->wRightMotorSpeed;
 
     if (!controller->enabled) return ERROR_SUCCESS;
@@ -311,6 +314,8 @@ static DWORD HID_set_state(struct xinput_controller *controller, XINPUT_VIBRATIO
         return 0;
     }
 
+    if (update_rumble)
+    {
         /* send haptics rumble report (left motor) */
         status = HidP_InitializeReportForID(HidP_Output, report_id, preparsed, report_buf, report_len);
         if (status != HIDP_STATUS_SUCCESS) WARN("HidP_InitializeReportForID returned %#lx\n", status);
@@ -328,7 +333,10 @@ static DWORD HID_set_state(struct xinput_controller *controller, XINPUT_VIBRATIO
             WARN("HidD_SetOutputReport failed with error %lu\n", GetLastError());
             return GetLastError();
         }
+    }
 
+    if (update_buzz)
+    {
         /* send haptics buzz report (right motor) */
         status = HidP_InitializeReportForID(HidP_Output, report_id, preparsed, report_buf, report_len);
         if (status != HIDP_STATUS_SUCCESS) WARN("HidP_InitializeReportForID returned %#lx\n", status);
@@ -346,7 +354,10 @@ static DWORD HID_set_state(struct xinput_controller *controller, XINPUT_VIBRATIO
             WARN("HidD_SetOutputReport failed with error %lu\n", GetLastError());
             return GetLastError();
         }
+    }
 
+    if (update_rumble || update_buzz)
+    {
         /* trigger haptics waveforms */
         status = HidP_InitializeReportForID(HidP_Output, report_id, preparsed, report_buf, report_len);
         if (status != HIDP_STATUS_SUCCESS) WARN("HidP_InitializeReportForID returned %#lx\n", status);
@@ -361,6 +372,7 @@ static DWORD HID_set_state(struct xinput_controller *controller, XINPUT_VIBRATIO
             WARN("HidD_SetOutputReport failed with error %lu\n", GetLastError());
             return GetLastError();
         }
+    }
 
     return ERROR_SUCCESS;
 }