---
title: CountUserDataFDF
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/countuserdatafdf
---

# CountUserDataFDF

## Declaration

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

## See Also

### Accessing the User Data

- [AudioFileComponentGetUserData(_:_:_:_:_:)](audiotoolbox/audiofilecomponentgetuserdata(_:_:_:_:_:).md)
- [AudioFileComponentSetUserData(_:_:_:_:_:)](audiotoolbox/audiofilecomponentsetuserdata(_:_:_:_:_:).md)
- [AudioFileComponentCountUserData(_:_:_:)](audiotoolbox/audiofilecomponentcountuserdata(_:_:_:).md)
- [AudioFileComponentGetUserDataSize(_:_:_:_:)](audiotoolbox/audiofilecomponentgetuserdatasize(_:_:_:_:).md)
- [AudioFileComponentRemoveUserData(_:_:_:)](audiotoolbox/audiofilecomponentremoveuserdata(_:_:_:).md)
- [AudioFileComponentCountUserDataProc](audiotoolbox/audiofilecomponentcountuserdataproc.md)
- [AudioFileComponentGetUserDataProc](audiotoolbox/audiofilecomponentgetuserdataproc.md)
- [AudioFileComponentGetUserDataSizeProc](audiotoolbox/audiofilecomponentgetuserdatasizeproc.md)
- [AudioFileComponentRemoveUserDataProc](audiotoolbox/audiofilecomponentremoveuserdataproc.md)
- [AudioFileComponentSetUserDataProc](audiotoolbox/audiofilecomponentsetuserdataproc.md)
- [GetUserDataFDF](audiotoolbox/getuserdatafdf.md)
- [GetUserDataSizeFDF](audiotoolbox/getuserdatasizefdf.md)