First pass at Windows sensor implementation

2024-12-20 22:16:49 +01:00 · 2020-04-08 08:34:27 -07:00 · 2020-04-08 08:34:27 -07:00 · 3180ba81af
commit 3180ba81af
parent 6e6b517789
17 changed files with 770 additions and 5 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -1417,6 +1417,13 @@ elseif(WINDOWS)
    set(HAVE_SDL_THREADS TRUE)
  endif()

+  if(SDL_SENSOR)
+    set(SDL_SENSOR_WINDOWS 1)
+    set(HAVE_SDL_SENSORS TRUE)
+    file(GLOB WINDOWS_SENSOR_SOURCES ${SDL2_SOURCE_DIR}/src/sensor/windows/*.c)
+    set(SOURCE_FILES ${SOURCE_FILES} ${WINDOWS_SENSOR_SOURCES})
+  endif()
+
  if(SDL_POWER)
    set(SDL_POWER_WINDOWS 1)
    set(SOURCE_FILES ${SOURCE_FILES} ${SDL2_SOURCE_DIR}/src/power/windows/SDL_syspower.c)
--- a/VisualC/SDL.sln
+++ b/VisualC/SDL.sln
@ -52,6 +52,8 @@ Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testvulkan", "tests\testvul
 EndProject
 Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testyuv", "tests\testyuv\testyuv.vcxproj", "{40FB7794-D3C3-4CFE-BCF4-A80C97635682}"
 EndProject
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "testsensor", "tests\testsensor\testsensor.vcxproj", "{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Win32 = Debug|Win32
@ -260,6 +262,14 @@ Global
 		{40FB7794-D3C3-4CFE-BCF4-A80C97635682}.Release|Win32.Build.0 = Release|Win32
 		{40FB7794-D3C3-4CFE-BCF4-A80C97635682}.Release|x64.ActiveCfg = Release|x64
 		{40FB7794-D3C3-4CFE-BCF4-A80C97635682}.Release|x64.Build.0 = Release|x64
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Debug|Win32.ActiveCfg = Debug|Win32
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Debug|Win32.Build.0 = Debug|Win32
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Debug|x64.ActiveCfg = Debug|x64
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Debug|x64.Build.0 = Debug|x64
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|Win32.ActiveCfg = Release|Win32
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|Win32.Build.0 = Release|Win32
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|x64.ActiveCfg = Release|x64
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}.Release|x64.Build.0 = Release|x64
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@ -287,5 +297,6 @@ Global
 		{55812185-D13C-4022-9C81-32E0F4A08306} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
 		{0D604DFD-AAB6-442C-9368-F91A344146AB} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
 		{40FB7794-D3C3-4CFE-BCF4-A80C97635682} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
+		{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4} = {D69D5741-611F-4E14-8541-1FEE94F50B5A}
 	EndGlobalSection
 EndGlobal
--- a/VisualC/SDL/SDL.vcxproj
+++ b/VisualC/SDL/SDL.vcxproj
@ -352,6 +352,7 @@
    <ClInclude Include="..\..\src\sensor\dummy\SDL_dummysensor.h" />
    <ClInclude Include="..\..\src\sensor\SDL_sensor_c.h" />
    <ClInclude Include="..\..\src\sensor\SDL_syssensor.h" />
+    <ClInclude Include="..\..\src\sensor\windows\SDL_windowssensor.h" />
    <ClInclude Include="..\..\src\thread\SDL_systhread.h" />
    <ClInclude Include="..\..\src\thread\SDL_thread_c.h" />
    <ClInclude Include="..\..\src\thread\windows\SDL_systhread_c.h" />
@ -487,6 +488,7 @@
    <ClCompile Include="..\..\src\SDL_log.c" />
    <ClCompile Include="..\..\src\sensor\dummy\SDL_dummysensor.c" />
    <ClCompile Include="..\..\src\sensor\SDL_sensor.c" />
+    <ClCompile Include="..\..\src\sensor\windows\SDL_windowssensor.c" />
    <ClCompile Include="..\..\src\stdlib\SDL_getenv.c" />
    <ClCompile Include="..\..\src\stdlib\SDL_iconv.c" />
    <ClCompile Include="..\..\src\stdlib\SDL_malloc.c" />
--- a/VisualC/SDL/SDL.vcxproj.filters
+++ b/VisualC/SDL/SDL.vcxproj.filters
@ -326,6 +326,7 @@
    <ClInclude Include="..\..\src\joystick\windows\SDL_rawinputjoystick_c.h" />
    <ClInclude Include="..\..\src\hidapi\hidapi\hidapi.h" />
    <ClInclude Include="..\..\src\joystick\SDL_gamecontrollerdb.h" />
+    <ClInclude Include="..\..\src\sensor\windows\SDL_windowssensor.h" />
  </ItemGroup>
  <ItemGroup>
    <ClCompile Include="..\..\src\atomic\SDL_atomic.c" />
@ -482,6 +483,7 @@
    <ClCompile Include="..\..\src\video\windows\SDL_windowswindow.c" />
    <ClCompile Include="..\..\src\video\yuv2rgb\yuv_rgb.c" />
    <ClCompile Include="..\..\src\joystick\windows\SDL_rawinputjoystick.c" />
+    <ClCompile Include="..\..\src\sensor\windows\SDL_windowssensor.c" />
  </ItemGroup>
  <ItemGroup>
    <ResourceCompile Include="..\..\src\main\windows\version.rc" />
--- a/VisualC/tests/testsensor/testsensor.vcxproj
+++ b/VisualC/tests/testsensor/testsensor.vcxproj
@ -0,0 +1,199 @@
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+    <ProjectConfiguration Include="Release|x64">
+      <Configuration>Release</Configuration>
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+  <PropertyGroup Label="Globals">
+    <ProjectGuid>{C4E04D18-EF76-4B42-B4C2-16A1BACDC0A4}</ProjectGuid>
+    <RootNamespace>testsensor</RootNamespace>
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--- a/10
+++ b/10
@ -25018,6 +25018,15 @@ $as_echo "#define SDL_HAPTIC_DINPUT 1" >>confdefs.h
                have_haptic=yes
            fi
        fi
+        # Set up files for the sensor library
+        if test x$enable_sensor = xyes; then
+
+$as_echo "#define SDL_SENSOR_WINDOWS 1" >>confdefs.h
+
+            SOURCES="$SOURCES $srcdir/src/sensor/windows/*.c"
+            have_sensor=yes
+        fi
+        # Set up files for the power library
        if test x$enable_power = xyes; then

 $as_echo "#define SDL_POWER_WINDOWS 1" >>confdefs.h
@ -25025,6 +25034,7 @@ $as_echo "#define SDL_POWER_WINDOWS 1" >>confdefs.h
            SOURCES="$SOURCES $srcdir/src/power/windows/SDL_syspower.c"
            have_power=yes
        fi
+        # Set up files for the filesystem library
        if test x$enable_filesystem = xyes; then

 $as_echo "#define SDL_FILESYSTEM_WINDOWS 1" >>confdefs.h
--- a/configure.ac
+++ b/configure.ac
@ -3739,11 +3739,19 @@ AS_HELP_STRING([--enable-render-d3d], [enable the Direct3D render driver [[defau
                have_haptic=yes
            fi
        fi
+        # Set up files for the sensor library
+        if test x$enable_sensor = xyes; then
+            AC_DEFINE(SDL_SENSOR_WINDOWS, 1, [ ])
+            SOURCES="$SOURCES $srcdir/src/sensor/windows/*.c"
+            have_sensor=yes
+        fi
+        # Set up files for the power library
        if test x$enable_power = xyes; then
            AC_DEFINE(SDL_POWER_WINDOWS, 1, [ ])
            SOURCES="$SOURCES $srcdir/src/power/windows/SDL_syspower.c"
            have_power=yes
        fi
+        # Set up files for the filesystem library
        if test x$enable_filesystem = xyes; then
            AC_DEFINE(SDL_FILESYSTEM_WINDOWS, 1, [ ])
            SOURCES="$SOURCES $srcdir/src/filesystem/windows/SDL_sysfilesystem.c"
--- a/include/SDL_config_windows.h
+++ b/include/SDL_config_windows.h
@ -201,8 +201,8 @@ typedef unsigned int uintptr_t;
 #define SDL_HAPTIC_DINPUT   1
 #define SDL_HAPTIC_XINPUT   1

-/* Enable the dummy sensor driver */
-#define SDL_SENSOR_DUMMY  1
+/* Enable the sensor driver */
+#define SDL_SENSOR_WINDOWS  1

 /* Enable various shared object loading systems */
 #define SDL_LOADSO_WINDOWS  1
--- a/include/SDL_sensor.h
+++ b/include/SDL_sensor.h
@ -121,6 +121,19 @@ typedef enum

 /* Function prototypes */

+/**
+ * Locking for multi-threaded access to the sensor API
+ *
+ * If you are using the sensor API or handling events from multiple threads
+ * you should use these locking functions to protect access to the sensors.
+ *
+ * In particular, you are guaranteed that the sensor list won't change, so
+ * the API functions that take a sensor index will be valid, and sensor
+ * events will not be delivered.
+ */
+extern DECLSPEC void SDLCALL SDL_LockSensors(void);
+extern DECLSPEC void SDLCALL SDL_UnlockSensors(void);
+
 /**
 *  \brief Count the number of sensors attached to the system right now
 */
--- a/src/dynapi/SDL_dynapi_overrides.h
+++ b/src/dynapi/SDL_dynapi_overrides.h
@ -757,3 +757,5 @@
 #define SDL_JoystickSetVirtualButton SDL_JoystickSetVirtualButton_REAL
 #define SDL_JoystickSetVirtualHat SDL_JoystickSetVirtualHat_REAL
 #define SDL_GetErrorMsg SDL_GetErrorMsg_REAL
+#define SDL_LockSensors SDL_LockSensors_REAL
+#define SDL_UnlockSensors SDL_UnlockSensors_REAL
--- a/src/dynapi/SDL_dynapi_procs.h
+++ b/src/dynapi/SDL_dynapi_procs.h
@ -816,3 +816,5 @@ SDL_DYNAPI_PROC(int,SDL_JoystickSetVirtualAxis,(SDL_Joystick *a, int b, Sint16 c
 SDL_DYNAPI_PROC(int,SDL_JoystickSetVirtualButton,(SDL_Joystick *a, int b, Uint8 c),(a,b,c),return)
 SDL_DYNAPI_PROC(int,SDL_JoystickSetVirtualHat,(SDL_Joystick *a, int b, Uint8 c),(a,b,c),return)
 SDL_DYNAPI_PROC(char*,SDL_GetErrorMsg,(char *a, int b),(a,b),return)
+SDL_DYNAPI_PROC(void,SDL_LockSensors,(void),(),)
+SDL_DYNAPI_PROC(void,SDL_UnlockSensors,(void),(),)
--- a/src/sensor/SDL_sensor.c
+++ b/src/sensor/SDL_sensor.c
@ -39,6 +39,9 @@ static SDL_SensorDriver *SDL_sensor_drivers[] = {
 #ifdef SDL_SENSOR_COREMOTION
    &SDL_COREMOTION_SensorDriver,
 #endif
+#ifdef SDL_SENSOR_WINDOWS
+	&SDL_WINDOWS_SensorDriver,
+#endif
 #if defined(SDL_SENSOR_DUMMY) || defined(SDL_SENSOR_DISABLED)
    &SDL_DUMMY_SensorDriver
 #endif
@ -48,7 +51,7 @@ static SDL_bool SDL_updating_sensor = SDL_FALSE;
 static SDL_mutex *SDL_sensor_lock = NULL; /* This needs to support recursive locks */
 static SDL_atomic_t SDL_next_sensor_instance_id;

-static void
+void
 SDL_LockSensors(void)
 {
    if (SDL_sensor_lock) {
@ -56,7 +59,7 @@ SDL_LockSensors(void)
    }
 }

-static void
+void
 SDL_UnlockSensors(void)
 {
    if (SDL_sensor_lock) {
--- a/src/sensor/SDL_syssensor.h
+++ b/src/sensor/SDL_syssensor.h
@ -98,8 +98,9 @@ typedef struct _SDL_SensorDriver
 /* The available sensor drivers */
 extern SDL_SensorDriver SDL_ANDROID_SensorDriver;
 extern SDL_SensorDriver SDL_COREMOTION_SensorDriver;
+extern SDL_SensorDriver SDL_WINDOWS_SensorDriver;
 extern SDL_SensorDriver SDL_DUMMY_SensorDriver;

-#endif /* SDL_syssensor_c_h_ */
+#endif /* SDL_syssensor_h_ */

 /* vi: set ts=4 sw=4 expandtab: */
--- a/src/sensor/android/SDL_androidsensor.c
+++ b/src/sensor/android/SDL_androidsensor.c
@ -18,6 +18,7 @@
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
 */
+#include "../../SDL_internal.h"

 #include "SDL_config.h"

--- a/src/sensor/dummy/SDL_dummysensor.c
+++ b/src/sensor/dummy/SDL_dummysensor.c
@ -18,6 +18,7 @@
     misrepresented as being the original software.
  3. This notice may not be removed or altered from any source distribution.
 */
+#include "../../SDL_internal.h"

 #include "SDL_config.h"

--- a/src/sensor/windows/SDL_windowssensor.c
+++ b/src/sensor/windows/SDL_windowssensor.c
@ -0,0 +1,480 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "../../SDL_internal.h"
+
+#include "SDL_config.h"
+
+#if defined(SDL_SENSOR_WINDOWS)
+
+#include "SDL_error.h"
+#include "SDL_mutex.h"
+#include "SDL_sensor.h"
+#include "SDL_windowssensor.h"
+#include "../SDL_syssensor.h"
+#include "../../core/windows/SDL_windows.h"
+
+#define COBJMACROS
+#include <InitGuid.h>
+#include <SensorsApi.h>
+#include <Sensors.h>
+
+DEFINE_GUID(CLSID_SensorManager, 0x77A1C827, 0xFCD2, 0x4689, 0x89, 0x15, 0x9D, 0x61, 0x3C, 0xC5, 0xFA, 0x3E);
+DEFINE_GUID(IID_SensorManager, 0xBD77DB67, 0x45A8, 0x42DC, 0x8D, 0x00, 0x6D, 0xCF, 0x15, 0xF8, 0x37, 0x7A);
+DEFINE_GUID(IID_SensorManagerEvents, 0x9B3B0B86, 0x266A, 0x4AAD, 0xB2, 0x1F, 0xFD, 0xE5, 0x50, 0x10, 0x01, 0xB7);
+DEFINE_GUID(IID_SensorEvents, 0x5D8DCC91, 0x4641, 0x47E7, 0xB7, 0xC3, 0xB7, 0x4F, 0x48, 0xA6, 0xC3, 0x91);
+
+DEFINE_PROPERTYKEY(SENSOR_DATA_TYPE_ANGULAR_VELOCITY_X_DEGREES_PER_SECOND, 0X3F8A69A2, 0X7C5, 0X4E48, 0XA9, 0X65, 0XCD, 0X79, 0X7A, 0XAB, 0X56, 0XD5, 10); //[VT_R8]
+DEFINE_PROPERTYKEY(SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Y_DEGREES_PER_SECOND, 0X3F8A69A2, 0X7C5, 0X4E48, 0XA9, 0X65, 0XCD, 0X79, 0X7A, 0XAB, 0X56, 0XD5, 11); //[VT_R8]
+DEFINE_PROPERTYKEY(SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Z_DEGREES_PER_SECOND, 0X3F8A69A2, 0X7C5, 0X4E48, 0XA9, 0X65, 0XCD, 0X79, 0X7A, 0XAB, 0X56, 0XD5, 12); //[VT_R8]
+
+typedef struct
+{
+	SDL_SensorID id;
+	ISensor *sensor;
+	SENSOR_ID sensor_id;
+	char *name;
+	SDL_SensorType type;
+	SDL_Sensor *sensor_opened;
+
+} SDL_Windows_Sensor;
+
+static SDL_bool SDL_windowscoinit;
+static ISensorManager *SDL_sensor_manager;
+static int SDL_num_sensors;
+static SDL_Windows_Sensor *SDL_sensors;
+
+static int ConnectSensor(ISensor *sensor);
+static int DisconnectSensor(ISensor *sensor);
+
+static HRESULT STDMETHODCALLTYPE ISensorManagerEventsVtbl_QueryInterface(ISensorManagerEvents * This, REFIID riid, void **ppvObject)
+{
+	if (!ppvObject) {
+		return E_INVALIDARG;
+	}
+
+	*ppvObject = NULL;
+	if (WIN_IsEqualIID(riid, &IID_IUnknown) || WIN_IsEqualIID(riid, &IID_SensorManagerEvents)) {
+		*ppvObject = This;
+		return S_OK;
+	}
+	return E_NOINTERFACE;
+}
+
+static ULONG STDMETHODCALLTYPE ISensorManagerEventsVtbl_AddRef(ISensorManagerEvents * This)
+{
+	return 1;
+}
+
+static ULONG STDMETHODCALLTYPE ISensorManagerEventsVtbl_Release(ISensorManagerEvents * This)
+{
+	return 1;
+}
+
+static HRESULT STDMETHODCALLTYPE ISensorManagerEventsVtbl_OnSensorEnter(ISensorManagerEvents * This, ISensor *pSensor, SensorState state)
+{
+	ConnectSensor(pSensor);
+	return S_OK;
+}
+
+static ISensorManagerEventsVtbl sensor_manager_events_vtbl = {
+	ISensorManagerEventsVtbl_QueryInterface,
+	ISensorManagerEventsVtbl_AddRef,
+	ISensorManagerEventsVtbl_Release,
+	ISensorManagerEventsVtbl_OnSensorEnter
+};
+static ISensorManagerEvents sensor_manager_events = {
+	&sensor_manager_events_vtbl
+};
+
+static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_QueryInterface(ISensorEvents * This, REFIID riid, void **ppvObject)
+{
+	if (!ppvObject) {
+		return E_INVALIDARG;
+	}
+
+	*ppvObject = NULL;
+	if (WIN_IsEqualIID(riid, &IID_IUnknown) || WIN_IsEqualIID(riid, &IID_SensorEvents)) {
+		*ppvObject = This;
+		return S_OK;
+	}
+	return E_NOINTERFACE;
+}
+
+static ULONG STDMETHODCALLTYPE ISensorEventsVtbl_AddRef(ISensorEvents * This)
+{
+	return 1;
+}
+
+static ULONG STDMETHODCALLTYPE ISensorEventsVtbl_Release(ISensorEvents * This)
+{
+	return 1;
+}
+
+static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnStateChanged(ISensorEvents * This, ISensor *pSensor, SensorState state)
+{
+#ifdef DEBUG_SENSORS
+	int i;
+
+	SDL_LockSensors();
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		if (pSensor == SDL_sensors[i].sensor) {
+			SDL_Log("Sensor %s state changed to %d\n", SDL_sensors[i].name, state);
+		}
+	}
+	SDL_UnlockSensors();
+#endif
+	return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnDataUpdated(ISensorEvents * This, ISensor *pSensor, ISensorDataReport *pNewData)
+{
+	int i;
+
+	SDL_LockSensors();
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		if (pSensor == SDL_sensors[i].sensor) {
+			if (SDL_sensors[i].sensor_opened) {
+				HRESULT hrX, hrY, hrZ;
+				PROPVARIANT valueX, valueY, valueZ;
+
+#ifdef DEBUG_SENSORS
+				SDL_Log("Sensor %s data updated\n", SDL_sensors[i].name);
+#endif
+				switch (SDL_sensors[i].type) {
+				case SDL_SENSOR_ACCEL:
+					hrX = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ACCELERATION_X_G, &valueX);
+					hrY = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ACCELERATION_Y_G, &valueY);
+					hrZ = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ACCELERATION_Z_G, &valueZ);
+					if (SUCCEEDED(hrX) && SUCCEEDED(hrY) && SUCCEEDED(hrZ) &&
+						valueX.vt == VT_R8 && valueY.vt == VT_R8 && valueZ.vt == VT_R8) {
+						float values[3];
+
+						values[0] = (float)valueX.dblVal;
+						values[1] = (float)valueY.dblVal;
+						values[2] = (float)valueZ.dblVal;
+						SDL_PrivateSensorUpdate(SDL_sensors[i].sensor_opened, values, 3);
+					}
+					break;
+				case SDL_SENSOR_GYRO:
+					hrX = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ANGULAR_VELOCITY_X_DEGREES_PER_SECOND, &valueX);
+					hrY = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Y_DEGREES_PER_SECOND, &valueY);
+					hrZ = ISensorDataReport_GetSensorValue(pNewData, &SENSOR_DATA_TYPE_ANGULAR_VELOCITY_Z_DEGREES_PER_SECOND, &valueZ);
+					if (SUCCEEDED(hrX) && SUCCEEDED(hrY) && SUCCEEDED(hrZ) &&
+						valueX.vt == VT_R8 && valueY.vt == VT_R8 && valueZ.vt == VT_R8) {
+						float values[3];
+
+						values[0] = (float)(valueX.dblVal * (M_PI / 180.0));
+						values[1] = (float)(valueY.dblVal * (M_PI / 180.0));
+						values[2] = (float)(valueZ.dblVal * (M_PI / 180.0));
+						SDL_PrivateSensorUpdate(SDL_sensors[i].sensor_opened, values, 3);
+					}
+					break;
+				default:
+					/* FIXME: Need to know how to interpret the data for this sensor */
+					break;
+				}
+			}
+			break;
+		}
+	}
+	SDL_UnlockSensors();
+
+	return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnEvent(ISensorEvents * This, ISensor *pSensor, REFGUID eventID, IPortableDeviceValues *pEventData)
+{
+#ifdef DEBUG_SENSORS
+	int i;
+
+	SDL_LockSensors();
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		if (pSensor == SDL_sensors[i].sensor) {
+			SDL_Log("Sensor %s event occurred\n", SDL_sensors[i].name);
+		}
+	}
+	SDL_UnlockSensors();
+#endif
+	return S_OK;
+}
+
+static HRESULT STDMETHODCALLTYPE ISensorEventsVtbl_OnLeave(ISensorEvents * This, REFSENSOR_ID ID)
+{
+	int i;
+
+	SDL_LockSensors();
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		if (WIN_IsEqualIID(ID, &SDL_sensors[i].sensor_id)) {
+#ifdef DEBUG_SENSORS
+			SDL_Log("Sensor %s disconnected\n", SDL_sensors[i].name);
+#endif
+			DisconnectSensor(SDL_sensors[i].sensor);
+		}
+	}
+	SDL_UnlockSensors();
+
+	return S_OK;
+}
+
+static ISensorEventsVtbl sensor_events_vtbl = {
+	ISensorEventsVtbl_QueryInterface,
+	ISensorEventsVtbl_AddRef,
+	ISensorEventsVtbl_Release,
+	ISensorEventsVtbl_OnStateChanged,
+	ISensorEventsVtbl_OnDataUpdated,
+	ISensorEventsVtbl_OnEvent,
+	ISensorEventsVtbl_OnLeave
+};
+static ISensorEvents sensor_events = {
+	&sensor_events_vtbl
+};
+
+static int ConnectSensor(ISensor *sensor)
+{
+	SDL_Windows_Sensor *new_sensor, *new_sensors;
+	HRESULT hr;
+	SENSOR_ID sensor_id;
+	SENSOR_TYPE_ID type_id;
+	SDL_SensorType type;
+	BSTR bstr_name = NULL;
+	char *name;
+
+	hr = ISensor_GetID(sensor, &sensor_id);
+	if (FAILED(hr)) {
+		return SDL_SetError("Couldn't get sensor ID: 0x%.4x", hr);
+	}
+
+	hr = ISensor_GetType(sensor, &type_id);
+	if (FAILED(hr)) {
+		return SDL_SetError("Couldn't get sensor type: 0x%.4x", hr);
+	}
+
+	if (WIN_IsEqualIID(&type_id, &SENSOR_TYPE_ACCELEROMETER_3D)) {
+		type = SDL_SENSOR_ACCEL;
+	} else if (WIN_IsEqualIID(&type_id, &SENSOR_TYPE_GYROMETER_3D)) {
+		type = SDL_SENSOR_GYRO;
+	} else {
+		return SDL_SetError("Unknown sensor type");
+	}
+
+	hr = ISensor_GetFriendlyName(sensor, &bstr_name);
+	if (SUCCEEDED(hr) && bstr_name) {
+		name = WIN_StringToUTF8(bstr_name);
+	} else {
+		name = SDL_strdup("Unknown Sensor");
+	}
+	if (!name) {
+		return SDL_OutOfMemory();
+	}
+
+	SDL_LockSensors();
+	new_sensors = (SDL_Windows_Sensor *)SDL_realloc(SDL_sensors, (SDL_num_sensors + 1) * sizeof(SDL_Windows_Sensor));
+	if (new_sensors == NULL) {
+		SDL_UnlockSensors();
+		return SDL_OutOfMemory();
+	}
+
+	ISensor_AddRef(sensor);
+	ISensor_SetEventSink(sensor, &sensor_events);
+
+	SDL_sensors = new_sensors;
+	new_sensor = &SDL_sensors[SDL_num_sensors];
+	++SDL_num_sensors;
+
+	new_sensor->id = SDL_GetNextSensorInstanceID();
+	new_sensor->sensor = sensor;
+	new_sensor->type = type;
+	new_sensor->name = name;
+
+	SDL_UnlockSensors();
+
+	return 0;
+}
+
+static int DisconnectSensor(ISensor *sensor)
+{
+	SDL_Windows_Sensor *old_sensor;
+	int i;
+
+	SDL_LockSensors();
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		old_sensor = &SDL_sensors[i];
+		if (sensor == old_sensor->sensor) {
+			ISensor_SetEventSink(sensor, NULL);
+			ISensor_Release(sensor);
+			SDL_free(old_sensor->name);
+			--SDL_num_sensors;
+			if (i < SDL_num_sensors) {
+				SDL_memmove(&SDL_sensors[i], &SDL_sensors[i + 1], (SDL_num_sensors - i) * sizeof(SDL_sensors[i]));
+			}
+			break;
+		}
+	}
+	SDL_UnlockSensors();
+
+	return 0;
+}
+
+static int
+SDL_WINDOWS_SensorInit(void)
+{
+	HRESULT hr;
+	ISensorCollection *sensor_collection = NULL;
+
+	while (!IsDebuggerPresent()) Sleep(100);
+
+	if (WIN_CoInitialize() == S_OK) {
+		SDL_windowscoinit = SDL_TRUE;
+	}
+
+	hr = CoCreateInstance(&CLSID_SensorManager, NULL, CLSCTX_INPROC_SERVER, &IID_SensorManager, &SDL_sensor_manager);
+	if (FAILED(hr)) {
+		return SDL_SetError("Couldn't create the sensor manager: 0x%.4x", hr);
+	}
+
+	hr = ISensorManager_SetEventSink(SDL_sensor_manager, &sensor_manager_events);
+	if (FAILED(hr)) {
+		ISensorManager_Release(SDL_sensor_manager);
+		return SDL_SetError("Couldn't set the sensor manager event sink: 0x%.4x", hr);
+	}
+
+	hr = ISensorManager_GetSensorsByCategory(SDL_sensor_manager, &SENSOR_CATEGORY_ALL, &sensor_collection);
+	if (SUCCEEDED(hr)) {
+		ULONG i, count;
+
+		hr = ISensorCollection_GetCount(sensor_collection, &count);
+		if (SUCCEEDED(hr)) {
+			for (i = 0; i < count; ++i) {
+				ISensor *sensor;
+
+				hr = ISensorCollection_GetAt(sensor_collection, i, &sensor);
+				if (SUCCEEDED(hr)) {
+					SensorState state;
+
+					hr = ISensor_GetState(sensor, &state);
+					if (SUCCEEDED(hr)) {
+						ISensorManagerEventsVtbl_OnSensorEnter(&sensor_manager_events, sensor, state);
+					}
+					ISensorManager_Release(sensor);
+				}
+			}
+		}
+		ISensorCollection_Release(sensor_collection);
+	}
+    return 0;
+}
+
+static int
+SDL_WINDOWS_SensorGetCount(void)
+{
+    return SDL_num_sensors;
+}
+
+static void
+SDL_WINDOWS_SensorDetect(void)
+{
+}
+
+static const char *
+SDL_WINDOWS_SensorGetDeviceName(int device_index)
+{
+    return SDL_sensors[device_index].name;
+}
+
+static SDL_SensorType
+SDL_WINDOWS_SensorGetDeviceType(int device_index)
+{
+	return SDL_sensors[device_index].type;
+}
+
+static int
+SDL_WINDOWS_SensorGetDeviceNonPortableType(int device_index)
+{
+    return -1;
+}
+
+static SDL_SensorID
+SDL_WINDOWS_SensorGetDeviceInstanceID(int device_index)
+{
+    return SDL_sensors[device_index].id;
+}
+
+static int
+SDL_WINDOWS_SensorOpen(SDL_Sensor *sensor, int device_index)
+{
+	SDL_sensors[device_index].sensor_opened = sensor;
+    return 0;
+}
+
+static void
+SDL_WINDOWS_SensorUpdate(SDL_Sensor *sensor)
+{
+}
+
+static void
+SDL_WINDOWS_SensorClose(SDL_Sensor *sensor)
+{
+	int i;
+
+	for (i = 0; i < SDL_num_sensors; ++i) {
+		if (sensor == SDL_sensors[i].sensor_opened) {
+			SDL_sensors[i].sensor_opened = NULL;
+			break;
+		}
+	}
+}
+
+static void
+SDL_WINDOWS_SensorQuit(void)
+{
+	while (SDL_num_sensors > 0) {
+		DisconnectSensor(SDL_sensors[0].sensor);
+	}
+
+	if (SDL_sensor_manager) {
+		ISensorManager_SetEventSink(SDL_sensor_manager, NULL);
+		ISensorManager_Release(SDL_sensor_manager);
+		SDL_sensor_manager = NULL;
+	}
+
+	if (SDL_windowscoinit) {
+		WIN_CoUninitialize();
+	}
+}
+
+SDL_SensorDriver SDL_WINDOWS_SensorDriver =
+{
+    SDL_WINDOWS_SensorInit,
+    SDL_WINDOWS_SensorGetCount,
+    SDL_WINDOWS_SensorDetect,
+    SDL_WINDOWS_SensorGetDeviceName,
+    SDL_WINDOWS_SensorGetDeviceType,
+    SDL_WINDOWS_SensorGetDeviceNonPortableType,
+    SDL_WINDOWS_SensorGetDeviceInstanceID,
+    SDL_WINDOWS_SensorOpen,
+    SDL_WINDOWS_SensorUpdate,
+    SDL_WINDOWS_SensorClose,
+    SDL_WINDOWS_SensorQuit,
+};
+
+#endif /* SDL_SENSOR_WINDOWS */
+
+/* vi: set ts=4 sw=4 expandtab: */
--- a/src/sensor/windows/SDL_windowssensor.h
+++ b/src/sensor/windows/SDL_windowssensor.h
@ -0,0 +1,23 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+#include "SDL_config.h"
+
+/* vi: set ts=4 sw=4 expandtab: */