---
title: CMIOExtensionStream.Direction.sink
framework: coremediaio
role: symbol
role_heading: Case
path: coremediaio/cmioextensionstream/direction-swift.enum/sink
---

# CMIOExtensionStream.Direction.sink

A stream that consumes sample buffers for playback.

## Declaration

```swift
case sink
```

## See Also

### Directions

- [CMIOExtensionStream.Direction.source](coremediaio/cmioextensionstream/direction-swift.enum/source.md)