OpenVR SDK 1.4.18

General:
* vr::VR_GetRunTimePath now takes a buffer to fill with the returned path. This form of the function is now thread-safe.

Driver Interface:
*  Prop_DashboardLayoutPathName_String - specified the name of the dashboard layout control file. Allows per-HMD control over settings like dashboard distance, etc.

HelloVR Sample:
* Added an example of generic bindings that will work ifno device-specific bindings are specified.

Valve Index Controller:
* Renamed some references from Knuckles to Index Controller

IVRChaperoneSetup:
* Added RoomSetupStarting - This fires an event that the tracking system can use to know room setup is about to begin. This lets the tracking system make any last minute adjustments that should be incorporated into the new setup.  If the user is adjusting live in HMD using a tweak tool, keep in mind that calling this might cause the user to see the room jump.

IVRCompositor: 
* Added IsMotionSmoothingSupported - This returns true if Motion Smoothing is supported by the current hardware.
* Added IsCurrentSceneFocusAppLoading - This indicates whether or not the current scene focus app is currently loading.  The return value is inferred from its use of FadeGrid to explicitly fade to the compositor to cover up the fact that it cannot render at a sustained full framerate during this time.

IVRInput:
* Split GetPoseActionData into two functions
  * GetPoseActionRelativeToNow - returns the data for the pose action for any time, given a relative number of seconds.
  * GetPoseActionDataForNextFrame - returns the data for the pose action that matches the application's most recent call to WaitGetPoses
* Added a eSummaryType argument to GetSkeletalSummaryData - This allows applications to specify how much filtering should be applied to the data:
  * VRSummaryType_FromAnimation - The data should match the animated transforms in the skeleton transforms. This data will probably be smoothed and may be more latent
  * VRSummaryType_FromDevice - The data should be the unprocessed values from the device when available. This data may include more jitter but may be provided with less latency.

[git-p4: depot-paths = "//vr/steamvr/sdk_release/": change = 5123272]

headers/openvr.h

@@ -15,8 +15,8 @@
 namespace vr
 {
 	static const uint32_t k_nSteamVRVersionMajor = 1;
-	static const uint32_t k_nSteamVRVersionMinor = 3;
-	static const uint32_t k_nSteamVRVersionBuild = 20;
+	static const uint32_t k_nSteamVRVersionMinor = 4;
+	static const uint32_t k_nSteamVRVersionBuild = 18;
 } // namespace vr
 
 // vrtypes.h
@@ -207,7 +207,7 @@ enum ETrackedControllerRole
 	TrackedControllerRole_RightHand = 2,				// Tracked device associated with the right hand
 	TrackedControllerRole_OptOut = 3,					// Tracked device is opting out of left/right hand selection
 	TrackedControllerRole_Treadmill = 4,				// Tracked device is a treadmill
-	TrackedControllerRole_Max = 4
+	TrackedControllerRole_Max = 5
 };
 
 
@@ -430,6 +430,11 @@ enum ETrackedDeviceProperty
 	Prop_CameraDistortionCoefficients_Float_Array = 2073, // Prop_NumCameras_Int32-sized array of double[vr::k_unMaxDistortionFunctionParameters] (max size is vr::k_unMaxCameras)
 	Prop_ExpectedControllerType_String			= 2074,
 
+	Prop_DisplayAvailableFrameRates_Float_Array = 2080, // populated by compositor from actual EDID list when available from GPU driver
+	Prop_DisplaySupportsMultipleFramerates_Bool = 2081, // if this is true but Prop_DisplayAvailableFrameRates_Float_Array is empty, explain to user
+
+	Prop_DashboardLayoutPathName_String			= 2090,
+
 	// Driver requested mura correction properties
 	Prop_DriverRequestedMuraCorrectionMode_Int32		= 2200,
 	Prop_DriverRequestedMuraFeather_InnerLeft_Int32		= 2201,
@@ -490,7 +495,7 @@ enum ETrackedDeviceProperty
 
 	// Properties that are set internally based on other information provided by drivers
 	Prop_ControllerType_String					= 7000,
-	Prop_LegacyInputProfile_String				= 7001,
+	//Prop_LegacyInputProfile_String				= 7001, // This is no longer used. See "legacy_binding" in the input profile instead.
 	Prop_ControllerHandSelectionPriority_Int32	= 7002, // Allows hand assignments to prefer some controllers over others. High numbers are selected over low numbers
 
 	// Vendors are free to expose private debug data in this reserved region
@@ -734,12 +739,14 @@ enum EVREventType
 	VREvent_DriverRequestedQuit				= 704, // The driver has requested that SteamVR shut down
 	VREvent_RestartRequested				= 705, // A driver or other component wants the user to restart SteamVR
 
-	VREvent_ChaperoneDataHasChanged			= 800, // Sent when the process needs to call VRChaperone()->ReloadInfo()
+	VREvent_ChaperoneDataHasChanged			= 800, // this will never happen with the new chaperone system
 	VREvent_ChaperoneUniverseHasChanged		= 801,
-	VREvent_ChaperoneTempDataHasChanged		= 802,
+	VREvent_ChaperoneTempDataHasChanged		= 802, // this will never happen with the new chaperone system
 	VREvent_ChaperoneSettingsHaveChanged	= 803,
 	VREvent_SeatedZeroPoseReset				= 804,
 	VREvent_ChaperoneFlushCache				= 805, // Sent when the process needs to reload any cached data it retrieved from VRChaperone()
+	VREvent_ChaperoneRoomSetupStarting	    = 806, // Triggered by CVRChaperoneClient::RoomSetupStarting
+	VREvent_ChaperoneRoomSetupFinished	    = 807, // Triggered by CVRChaperoneClient::CommitWorkingCopy
 
 	VREvent_AudioSettingsHaveChanged		= 820,
 
@@ -794,6 +801,7 @@ enum EVREventType
 	VREvent_Compositor_HDCPError				= 1414, // data is hdcpError
 	VREvent_Compositor_ApplicationNotResponding	= 1415,
 	VREvent_Compositor_ApplicationResumed		= 1416,
+	VREvent_Compositor_OutOfVideoMemory			= 1417,
 
 	VREvent_TrackedCamera_StartVideoStream  = 1500,
 	VREvent_TrackedCamera_StopVideoStream   = 1501,
@@ -871,9 +879,9 @@ enum EVRButtonId
 
 	k_EButton_Dashboard_Back	= k_EButton_Grip,
 
-	k_EButton_Knuckles_A		= k_EButton_Grip,
-	k_EButton_Knuckles_B		= k_EButton_ApplicationMenu,
-	k_EButton_Knuckles_JoyStick	= k_EButton_Axis3,
+	k_EButton_IndexController_A		= k_EButton_Grip,
+	k_EButton_IndexController_B		= k_EButton_ApplicationMenu,
+	k_EButton_IndexController_JoyStick	= k_EButton_Axis3,
 
 	k_EButton_Max				= 64
 };
@@ -1099,7 +1107,7 @@ enum EShowUIType
 {
 	ShowUI_ControllerBinding = 0,
 	ShowUI_ManageTrackers = 1,
-	ShowUI_QuickStart = 2,
+	// ShowUI_QuickStart = 2, // Deprecated
 	ShowUI_Pairing = 3,
 	ShowUI_Settings = 4,
 };
@@ -1428,7 +1436,7 @@ enum EVRSkeletalTrackingLevel
 
 	// body part location can be measured directly but with fewer degrees of freedom than the actual body 
 	// part. Certain body part positions may be unmeasured by the device and estimated from other input data. 
-	// E.g. Knuckles, gloves that only measure finger curl
+	// E.g. Index Controllers, gloves that only measure finger curl
 	VRSkeletalTracking_Partial,
 
 	// Body part location can be measured directly throughout the entire range of motion of the body part. 
@@ -1505,6 +1513,7 @@ enum EVRInitError
 	VRInitError_Init_VRWebHelperStartupFailed		= 141,
 	VRInitError_Init_TrackerManagerInitFailed		= 142,
 	VRInitError_Init_AlreadyRunning					= 143,
+	VRInitError_Init_FailedForVrMonitor				= 144,
 
 	VRInitError_Driver_Failed						= 200,
 	VRInitError_Driver_Unknown						= 201,
@@ -1519,6 +1528,7 @@ enum EVRInitError
 	// VRInitError_Driver_HmdDisplayNotFoundAfterFix = 210, // not needed: here for historic reasons
 	VRInitError_Driver_HmdDriverIdOutOfBounds		= 211,
 	VRInitError_Driver_HmdDisplayMirrored			= 212,
+	VRInitError_Driver_HmdDisplayNotFoundLaptop		= 213,
 
 	VRInitError_IPC_ServerInitFailed				= 300,
 	VRInitError_IPC_ConnectFailed					= 301,
@@ -2523,6 +2533,7 @@ namespace vr
 	static const char * const k_pch_SteamVR_ForceWindows32bitVRMonitor = "forceWindows32BitVRMonitor";
 	static const char * const k_pch_SteamVR_DebugInput = "debugInput";
 	static const char * const k_pch_SteamVR_DebugInputBinding = "debugInputBinding";
+	static const char * const k_pch_SteamVR_DoNotFadeToGrid = "doNotFadeToGrid";
 	static const char * const k_pch_SteamVR_InputBindingUIBlock = "inputBindingUI";
 	static const char * const k_pch_SteamVR_RenderCameraMode = "renderCameraMode";
 	static const char * const k_pch_SteamVR_EnableSharedResourceJournaling = "enableSharedResourceJournaling";
@@ -2551,6 +2562,7 @@ namespace vr
 	static const char * const k_pch_Lighthouse_EnableBluetooth_Bool = "enableBluetooth";
 	static const char * const k_pch_Lighthouse_PowerManagedBaseStations_String = "PowerManagedBaseStations";
 	static const char * const k_pch_Lighthouse_PowerManagedBaseStations2_String = "PowerManagedBaseStations2";
+	static const char * const k_pch_Lighthouse_InactivityTimeoutForBaseStations_Int32 = "InactivityTimeoutForBaseStations";
 	static const char * const k_pch_Lighthouse_EnableImuFallback_Bool = "enableImuFallback";
 	static const char * const k_pch_Lighthouse_NewPairing_Bool = "newPairing";
 
@@ -2600,7 +2612,7 @@ namespace vr
 	static const char * const k_pch_Perf_AllowTimingStore_Bool = "allowTimingStore";
 	static const char * const k_pch_Perf_SaveTimingsOnExit_Bool = "saveTimingsOnExit";
 	static const char * const k_pch_Perf_TestData_Float = "perfTestData";
-	static const char * const k_pch_Perf_LinuxGPUProfiling_Bool = "linuxGPUProfiling";
+	static const char * const k_pch_Perf_GPUProfiling_Bool = "GPUProfiling";
 
 	//-----------------------------------------------------------------------------
 	// collision bounds keys
@@ -2867,6 +2879,11 @@ class IVRChaperoneSetup
 
 	/** Hides the chaperone data in the working set to preview in the compositor (if it was visible).*/
 	virtual void HideWorkingSetPreview() = 0;
+
+	/** Fire an event that the tracking system can use to know room setup is about to begin. This lets the tracking
+	 * system make any last minute adjustments that should be incorporated into the new setup.  If the user is adjusting
+	 * live in HMD using a tweak tool, keep in mind that calling this might cause the user to see the room jump. */
+	virtual void RoomSetupStarting() = 0;
 };
 
 static const char * const IVRChaperoneSetup_Version = "IVRChaperoneSetup_006";
@@ -3201,6 +3218,13 @@ class IVRCompositor
 	* If you want to know if motion smoothing actually triggered due to a late frame, check Compositor_FrameTiming
 	* m_nReprojectionFlags & VRCompositor_ReprojectionMotion instead. */
 	virtual bool IsMotionSmoothingEnabled() = 0;
+
+	/** Indicates whether or not motion smoothing is supported by the current hardware. */
+	virtual bool IsMotionSmoothingSupported() = 0;
+
+	/** Indicates whether or not the current scene focus app is currently loading.  This is inferred from its use of FadeGrid to
+	* explicitly fade to the compositor to cover up the fact that it cannot render at a sustained full framerate during this time. */
+	virtual bool IsCurrentSceneFocusAppLoading() = 0;
 };
 
 static const char * const IVRCompositor_Version = "IVRCompositor_022";
@@ -4296,6 +4320,16 @@ namespace vr
 		VRFingerSplay_Count
 	};
 
+	enum EVRSummaryType
+	{
+		// The skeletal summary data will match the animated bone transforms for the action.
+		VRSummaryType_FromAnimation = 0,	
+
+		// The skeletal summary data will include unprocessed data directly from the device when available. 
+		// This data is generally less latent than the data that is computed from the animations.
+		VRSummaryType_FromDevice = 1,		
+	};
+
 	enum EVRInputFilterCancelType
 	{
 		VRInputFilterCancel_Timers = 0,
@@ -4448,8 +4482,13 @@ namespace vr
 		* action is something other than analog */
 		virtual EVRInputError GetAnalogActionData( VRActionHandle_t action, InputAnalogActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice ) = 0;
 
-		/** Reads the state of a pose action given its handle. */
-		virtual EVRInputError GetPoseActionData( VRActionHandle_t action, ETrackingUniverseOrigin eOrigin, float fPredictedSecondsFromNow, InputPoseActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice ) = 0;
+		/** Reads the state of a pose action given its handle for the number of seconds relative to now. This
+		* will generally be called with negative times from the fUpdateTime fields in other actions. */
+		virtual EVRInputError GetPoseActionDataRelativeToNow( VRActionHandle_t action, ETrackingUniverseOrigin eOrigin, float fPredictedSecondsFromNow, InputPoseActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice ) = 0;
+
+		/** Reads the state of a pose action given its handle. The returned values will match the values returned
+		* by the last call to IVRCompositor::WaitGetPoses(). */
+		virtual EVRInputError GetPoseActionDataForNextFrame( VRActionHandle_t action, ETrackingUniverseOrigin eOrigin, InputPoseActionData_t *pActionData, uint32_t unActionDataSize, VRInputValueHandle_t ulRestrictToDevice ) = 0;
 
 		/** Reads the state of a skeletal action given its handle. */
 		virtual EVRInputError GetSkeletalActionData( VRActionHandle_t action, InputSkeletalActionData_t *pActionData, uint32_t unActionDataSize ) = 0;
@@ -4477,7 +4516,7 @@ namespace vr
 		virtual EVRInputError GetSkeletalBoneData( VRActionHandle_t action, EVRSkeletalTransformSpace eTransformSpace, EVRSkeletalMotionRange eMotionRange, VR_ARRAY_COUNT( unTransformArrayCount ) VRBoneTransform_t *pTransformArray, uint32_t unTransformArrayCount ) = 0;
 
 		/** Reads summary information about the current pose of the skeleton associated with the given action.   */
-		virtual EVRInputError GetSkeletalSummaryData( VRActionHandle_t action, VRSkeletalSummaryData_t * pSkeletalSummaryData ) = 0;
+		virtual EVRInputError GetSkeletalSummaryData( VRActionHandle_t action, EVRSummaryType eSummaryType, VRSkeletalSummaryData_t * pSkeletalSummaryData ) = 0;
 
 		/** Reads the state of the skeletal bone data in a compressed form that is suitable for
 		* sending over the network. The required buffer size will never exceed ( sizeof(VR_BoneTransform_t)*boneCount + 2).
@@ -4514,7 +4553,7 @@ namespace vr
 		virtual bool IsUsingLegacyInput() = 0;
 	};
 
-	static const char * const IVRInput_Version = "IVRInput_005";
+	static const char * const IVRInput_Version = "IVRInput_006";
 
 } // namespace vr
 
@@ -4656,8 +4695,8 @@ namespace vr
 	VR_INTERFACE bool VR_CALLTYPE VR_IsRuntimeInstalled();
 
 	/** Returns where the OpenVR runtime is installed. */
-	VR_INTERFACE const char *VR_CALLTYPE VR_RuntimePath();
-
+	VR_INTERFACE bool VR_GetRuntimePath( VR_OUT_STRING() char *pchPathBuffer, uint32_t unBufferSize, uint32_t *punRequiredBufferSize );
+	
 	/** Returns the name of the enum value for an EVRInitError. This function may be called outside of VR_Init()/VR_Shutdown(). */
 	VR_INTERFACE const char *VR_CALLTYPE VR_GetVRInitErrorAsSymbol( EVRInitError error );