add package files
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VR164000
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using System;
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using System.Runtime.InteropServices;
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using UnityEditor;
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using UnityEngine.XR.OpenXR.Features;
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#if UNITY_EDITOR
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using UnityEditor.XR.OpenXR.Features;
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#endif
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namespace VIVE
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{
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namespace FacialTracking
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{
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#if UNITY_EDITOR
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[OpenXRFeature(UiName = "Facial Tracking",
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BuildTargetGroups = new[] { BuildTargetGroup.Standalone },
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Company = "HTC",
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Desc = "Facial Tracking OpenXR Feature",
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DocumentationLink = "https://developer.vive.com/resources/openxr/openxr-pcvr/tutorials/unity/integrate-facial-tracking-your-avatar/",
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OpenxrExtensionStrings = "XR_HTC_facial_tracking",
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Version = "0.0.1",
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FeatureId = featureId)]
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#endif
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public class VIVE_FacialTracking_OpenXR_API : OpenXRFeature
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{
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/// <summary>
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/// The feature id string. This is used to give the feature a well known id for reference.
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/// </summary>
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public const string featureId = "com.htc.openxr.facialtracking.feature";
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private ulong m_XrInstance;
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private ulong m_XrSession;
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private ulong m_systemid;
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[Obsolete] XrSystemProperties systemProperties;
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[Obsolete] public ulong m_expressionHandle;
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[Obsolete] public ulong m_expressionHandle_Lip;
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public bool IsInitialized { get { return m_xrGetSystemProperties != null; } }
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public bool IsEnabledAndInitialized { get { return enabled && IsInitialized; } }
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public bool IsSessionCreated { get { return XrSession != default; } }
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public ulong XrInstance { get { return m_XrInstance; } }
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public ulong XrSession { get { return m_XrSession; } }
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public ulong SystemId { get { return m_systemid; } }
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public event Action<ulong> onSessionCreate;
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public event Action<ulong> onSessionDestroy;
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public event Action<ulong> onSystemChange;
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/// <inheritdoc />
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protected override bool OnInstanceCreate(ulong xrInstance)
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{
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UnityEngine.Debug.Log($"OnInstanceCreate({xrInstance:X})");
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m_XrInstance = xrInstance;
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return GetXrFunctionDelegates(xrInstance);
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}
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/// <inheritdoc />
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protected override void OnInstanceDestroy(ulong xrInstance)
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{
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UnityEngine.Debug.Log($"OnInstanceDestroy({xrInstance:X})");
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m_XrInstance = default;
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}
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protected override void OnSessionCreate(ulong xrSession)
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{
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UnityEngine.Debug.Log($"OnSessionCreate({xrSession:X})");
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m_XrSession = xrSession;
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try { onSessionCreate?.Invoke(xrSession); }
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catch (Exception e) { UnityEngine.Debug.LogError(e); }
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}
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protected override void OnSystemChange(ulong xrSystem)
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{
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UnityEngine.Debug.Log($"OnSystemChange({xrSystem:X})");
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m_systemid = xrSystem;
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try { onSystemChange?.Invoke(xrSystem); }
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catch (Exception e) { UnityEngine.Debug.LogError(e); }
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}
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protected override void OnSessionDestroy(ulong xrSession)
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{
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UnityEngine.Debug.Log($"OnSessionDestroy({xrSession:X})");
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m_XrSession = default;
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try { onSessionDestroy?.Invoke(xrSession); }
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catch (Exception e) { UnityEngine.Debug.LogError(e); }
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}
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private bool GetXrFunctionDelegates(ulong xrInstance)
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{
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if (xrGetInstanceProcAddr == null || xrGetInstanceProcAddr == IntPtr.Zero)
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UnityEngine.Debug.LogError("xrGetInstanceProcAddr is null");
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// Get delegate of xrGetInstanceProcAddr.
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var xrGetProc = Marshal.GetDelegateForFunctionPointer<xrGetInstanceProcDelegate>(xrGetInstanceProcAddr);
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// Get delegate of other OpenXR functions using xrGetInstanceProcAddr.
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if (!MarshelFunc(xrInstance, xrGetProc, "xrGetSystemProperties", ref m_xrGetSystemProperties)) { return false; }
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if (!MarshelFunc(xrInstance, xrGetProc, "xrCreateFacialTrackerHTC", ref m_xrCreateFacialTrackerHTC)) { return false; }
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if (!MarshelFunc(xrInstance, xrGetProc, "xrDestroyFacialTrackerHTC", ref m_xrDestroyFacialTrackerHTC)) { return false; }
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if (!MarshelFunc(xrInstance, xrGetProc, "xrGetFacialExpressionsHTC", ref m_xrGetFacialExpressionsHTC)) { return false; }
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return true;
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}
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private static bool MarshelFunc<T>(ulong instance, xrGetInstanceProcDelegate instanceProc, string funcName, ref T func, bool verbose = true)
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where T : Delegate
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{
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if (instanceProc(instance, funcName, out var fp) != 0)
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{
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if (verbose)
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{
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UnityEngine.Debug.LogError("Fail getting function " + funcName);
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}
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return false;
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}
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func = Marshal.GetDelegateForFunctionPointer<T>(fp);
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return true;
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}
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delegate int XrGetInstanceProcAddrDelegate(ulong instance, string name, out IntPtr function);
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XrGetInstanceProcAddrDelegate m_XrGetInstanceProcAddr;
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delegate int xrGetSystemPropertiesDelegate(ulong instance, ulong systemId, ref XrSystemProperties properties);
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xrGetSystemPropertiesDelegate m_xrGetSystemProperties;
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public int xrGetSystemProperties(ref XrSystemProperties properties) =>
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m_xrGetSystemProperties(m_XrInstance, m_systemid, ref properties);
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public int xrGetSystemProperties(ulong instance, ulong systemId, ref XrSystemProperties properties) =>
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m_xrGetSystemProperties(instance, systemId, ref properties);
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delegate int xrCreateFacialTrackerHTCDelegate(ulong session, XrFacialTrackerCreateInfoHTC createInfo, out ulong expression);
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xrCreateFacialTrackerHTCDelegate m_xrCreateFacialTrackerHTC;
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public int xrCreateFacialTrackerHTC(XrFacialTrackerCreateInfoHTC createInfo ,out ulong handle) =>
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m_xrCreateFacialTrackerHTC(m_XrSession, createInfo, out handle);
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public int xrCreateFacialTrackerHTC(ulong session, XrFacialTrackerCreateInfoHTC createInfo, out ulong handle) =>
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m_xrCreateFacialTrackerHTC(session, createInfo, out handle);
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delegate int xrDestroyFacialTrackerHTCDelegate(ulong facialTracker);
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xrDestroyFacialTrackerHTCDelegate m_xrDestroyFacialTrackerHTC;
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public int xrDestroyFacialTrackerHTC(ulong handle) =>
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m_xrDestroyFacialTrackerHTC(handle);
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delegate int xrGetFacialExpressionsHTCDelegate(ulong facialTracker, ref XrFacialExpressionsHTC eyeExpressionData);
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xrGetFacialExpressionsHTCDelegate m_xrGetFacialExpressionsHTC;
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public int xrGetFacialExpressionsHTC(ulong handle,ref XrFacialExpressionsHTC eyeExpressionData) =>
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m_xrGetFacialExpressionsHTC(handle, ref eyeExpressionData);
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public unsafe void SystemSupportsFacialTracking(out XrResult result,out bool isSupportEye,out bool isSupportLip)
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{
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XrSystemFacialTrackingPropertiesHTC expressionProperties = new XrSystemFacialTrackingPropertiesHTC
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{
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type = XrStructureType.XR_TYPE_SYSTEM_FACIAL_TRACKING_PROPERTIES_HTC,
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next = IntPtr.Zero,
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};
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var systemProp = new XrSystemProperties()
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{
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type = XrStructureType.XR_TYPE_SYSTEM_PROPERTIES,
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next = (IntPtr)(&expressionProperties),
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};
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result = (XrResult)xrGetSystemProperties(XrInstance, SystemId ,ref systemProp);
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isSupportEye = expressionProperties.supportEyeFacialTracking != 0;
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isSupportLip = expressionProperties.supportLipFacialTracking != 0;
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}
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public bool TryCreateFacialTracker(XrFacialTrackingTypeHTC type,out ulong handle, out XrResult result)
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{
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XrFacialTrackerCreateInfoHTC createInfo = new XrFacialTrackerCreateInfoHTC(
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XrStructureType.XR_TYPE_FACIAL_TRACKER_CREATE_INFO_HTC,
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IntPtr.Zero,
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type);
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result = (XrResult)xrCreateFacialTrackerHTC(XrSession,createInfo, out handle);
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return result == XrResult.XR_SUCCESS;
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}
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public bool TryDestroFacialTracker(ulong handle, out XrResult result)
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{
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result= (XrResult)xrDestroyFacialTrackerHTC(handle);
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return result == XrResult.XR_SUCCESS;
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}
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public bool TryGetFacialData(ulong handle,out bool isActive,int maxExpressioncount,out XrResult result,float[] blendshapes)
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{
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XrFacialExpressionsHTC facialExpression = new XrFacialExpressionsHTC()
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{
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type = XrStructureType.XR_TYPE_FACIAL_EXPRESSIONS_HTC,
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expressionCount = maxExpressioncount,
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sampleTime = 10L, //An arbitrary number greater than 0
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blendShapeWeightings = Marshal.AllocCoTaskMem(sizeof(float) * maxExpressioncount),
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};
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result = (XrResult)xrGetFacialExpressionsHTC(handle, ref facialExpression);
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Marshal.Copy(facialExpression.blendShapeWeightings, blendshapes, 0, maxExpressioncount);
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isActive = facialExpression.isActive != 0u;
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return result == XrResult.XR_SUCCESS;
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}
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}
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}
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}
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