---
title: AudioFileComponentExtensionIsThisFormatProc
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/audiofilecomponentextensionisthisformatproc
---

# AudioFileComponentExtensionIsThisFormatProc

## Declaration

```swift
typealias AudioFileComponentExtensionIsThisFormatProc = (UnsafeMutableRawPointer, CFString, UnsafeMutablePointer<UInt32>) -> OSStatus
```

## See Also

### Checking the File Format

- [AudioFileComponentFileDataIsThisFormat(_:_:_:_:)](audiotoolbox/audiofilecomponentfiledataisthisformat(_:_:_:_:).md)
- [AudioFileComponentExtensionIsThisFormat(_:_:_:)](audiotoolbox/audiofilecomponentextensionisthisformat(_:_:_:).md)
- [AudioFileComponentFileDataIsThisFormatProc](audiotoolbox/audiofilecomponentfiledataisthisformatproc.md)
- [GetPropertyFDF](audiotoolbox/getpropertyfdf.md)
- [GetPropertyInfoFDF](audiotoolbox/getpropertyinfofdf.md)