---
title: ReadBytesFDF
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/readbytesfdf
---

# ReadBytesFDF

## Declaration

```swift
typealias ReadBytesFDF = (UnsafeMutableRawPointer, DarwinBoolean, Int64, UnsafeMutablePointer<UInt32>, UnsafeMutableRawPointer) -> OSStatus
```

## See Also

### Data Types

- [ExtendedControlEvent](audiotoolbox/extendedcontrolevent.md)
- [MIDIEndpointRef](coremidi/midiendpointref.md)
- [MagicCookieInfo](audiotoolbox/magiccookieinfo.md)
- [NoteInstanceID](audiotoolbox/noteinstanceid.md)
- [ReadPacketDataFDF](audiotoolbox/readpacketdatafdf.md)
- [ReadPacketsFDF](audiotoolbox/readpacketsfdf.md)
- [SetPropertyFDF](audiotoolbox/setpropertyfdf.md)
- [SetUserDataFDF](audiotoolbox/setuserdatafdf.md)
- [WriteBytesFDF](audiotoolbox/writebytesfdf.md)
- [WritePacketsFDF](audiotoolbox/writepacketsfdf.md)
- [AudioSessionPropertyID](audiotoolbox/audiosessionpropertyid.md)