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

# CMIOExtensionStream.Direction.source

A stream that provides sample buffers for capture.

## Declaration

```swift
case source
```

## See Also

### Directions

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