---
title: HostCallback_GetTransportState2
framework: audiotoolbox
role: symbol
role_heading: Type Alias
path: audiotoolbox/hostcallback_gettransportstate2
---

# HostCallback_GetTransportState2

## Declaration

```swift
typealias HostCallback_GetTransportState2 = (UnsafeMutableRawPointer?, UnsafeMutablePointer<DarwinBoolean>?, UnsafeMutablePointer<DarwinBoolean>?, UnsafeMutablePointer<DarwinBoolean>?, UnsafeMutablePointer<Float64>?, UnsafeMutablePointer<DarwinBoolean>?, UnsafeMutablePointer<Float64>?, UnsafeMutablePointer<Float64>?) -> OSStatus
```

## See Also

### Getting Information from the Host

- [HostCallback_GetBeatAndTempo](audiotoolbox/hostcallback_getbeatandtempo.md)
- [HostCallback_GetMusicalTimeLocation](audiotoolbox/hostcallback_getmusicaltimelocation.md)
- [HostCallback_GetTransportState](audiotoolbox/hostcallback_gettransportstate.md)
- [AUInputSamplesInOutputCallback](audiotoolbox/auinputsamplesinoutputcallback.md)
- [AUMIDIOutputCallback](audiotoolbox/aumidioutputcallback.md)