C Specification

// Provided by XR_FB_face_tracking2
typedef struct XrSystemFaceTrackingProperties2FB {
    XrStructureType    type;
    void*              next;
    XrBool32           supportsVisualFaceTracking;
    XrBool32           supportsAudioFaceTracking;
} XrSystemFaceTrackingProperties2FB;

Members

Member Descriptions

  • type is the XrStructureType of this structure.

  • next is NULL or a pointer to the next structure in a structure chain. No such structures are defined in core OpenXR or this extension.

  • supportsVisualFaceTracking is an XrBool32, indicating if the current system is capable of receiving face tracking input that is estimated based on visual data source.

  • supportsAudioFaceTracking is an XrBool32, indicating if the current system is capable of receiving face tracking input that is estimated based on audio data source.

Description

An application can inspect whether the system is capable of receiving face tracking input by extending the XrSystemProperties with XrSystemFaceTrackingProperties2FB structure when calling xrGetSystemProperties.

If an application calls xrCreateFaceTracker2FB only with unsupported XrFaceTrackerCreateInfo2FB::requestedDataSources, the runtime must return XR_ERROR_FEATURE_UNSUPPORTED from xrCreateFaceTracker2FB. For example, if an application calls xrCreateFaceTracker2FB only with XR_FACE_TRACKING_DATA_SOURCE2_AUDIO_FB in XrFaceTrackerCreateInfo2FB::requestedDataSources when the runtime returns XR_FALSE for supportsAudioFaceTracking, the runtime must return XR_ERROR_FEATURE_UNSUPPORTED from xrCreateFaceTracker2FB.

Valid Usage (Implicit)

See Also

XR_FB_face_tracking2, XrBool32, XrStructureType

Document Notes

For more information, see the OpenXR Specification

This page is extracted from the OpenXR Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

This work is licensed under a Creative Commons Attribution 4.0 International License.