# PlaybackBackgroundView

Source: https://www.nianticspatial.com/docs/api/kotlin/com.nianticspatial.nsdk.playback.PlaybackBackgroundView/

PlaybackBackgroundView
> extends ImageView

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## Declaration

class PlaybackBackgroundView

## Summary

A view that displays the current playback frame image as the background.
Place this view behind your 3D/GL surface when in playback mode and call [setPlaybackFrame]
whenever a new [PlaybackFrame] is delivered so the recorded camera image is shown.
Orientation is corrected so that the image (which may be stored in sensor/landscape layout)
is rotated to match the current device orientation using [ImageMath.displayTransform].
Use with [PlaybackSession] and a frame listener: when the session delivers a frame,
build [FrameData] for NSDK and call [setPlaybackFrame] to update this view.

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## Functions

| Name | Type | Summary |
| --- | --- | --- |
| onSizeChanged | void | - |
| setPlaybackFrame | void | Updates the background image from the given playback frame.Call on the main thread when [PlaybackSession] delivers a new frame.If [frame] is null or [frame.image] is null, the view is cleared.Applies a display transform so the image orientation matches the current device orientation.Uses frame metadata [screenOrientation] when present, with fallback to resolution-based inference. |

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