# NSDKSessionDataSource

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.interface-NSDKSessionDataSource/

NSDKSessionDataSource

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## Declaration

protocol NSDKSessionDataSource : AnyObject

## Summary

Provides synchronous, pull-based access to the latest available sensor data
required by `NSDKSession`.
All methods must be non-blocking and thread-safe. Returned values represent
the most recent samples already captured by the underlying services.

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## Properties

| Name | Type | Summary |
| --- | --- | --- |
| var isReady | Bool | Indicates whether the data source is currently able to providemeaningful sensor data. |

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| latestCameraSample | (image: CVPixelBuffer, intrinsics: NSDKCameraIntrinsics, pose: NSDKCameraExtrinsics, orientation: NSDKScreenOrientation, timestamp: UInt64)? | Returns the most recent camera sample, if available. |
| latestCompassSample | NSDKFrameData.CompassData? | Returns the most recent compass (heading) sample, if available. |
| latestDepthMapSample | (image: CVPixelBuffer, confidence: CVPixelBuffer?, intrinsics: NSDKCameraIntrinsics, pose: NSDKCameraExtrinsics, orientation: NSDKScreenOrientation, timestamp: UInt64)? | Returns the most recent platform depth sample, if available. |
| latestGpsSample | NSDKFrameData.GpsData? | Returns the most recent GPS sample, if available. |
| latestTrackingStateSample | NsdkTrackingState | Returns the most recent VIO tracking state report |

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## Relationships

conformance:  DefaultSessionDataSource 

conformance:  PlaybackSessionDataSource