---
title: "init(mAudioDataBytesCapacity:mAudioData:mAudioDataByteSize:mUserData:mPacketDescriptionCapacity:mPacketDescriptions:mPacketDescriptionCount:)"
framework: audiotoolbox
role: symbol
role_heading: Initializer
path: "audiotoolbox/audioqueuebuffer/init(maudiodatabytescapacity:maudiodata:maudiodatabytesize:muserdata:mpacketdescriptioncapacity:mpacketdescriptions:mpacketdescriptioncount:)"
---

# init(mAudioDataBytesCapacity:mAudioData:mAudioDataByteSize:mUserData:mPacketDescriptionCapacity:mPacketDescriptions:mPacketDescriptionCount:)

## Declaration

```swift
init(mAudioDataBytesCapacity: UInt32, mAudioData: UnsafeMutableRawPointer, mAudioDataByteSize: UInt32, mUserData: UnsafeMutableRawPointer?, mPacketDescriptionCapacity: UInt32, mPacketDescriptions: UnsafeMutablePointer<AudioStreamPacketDescription>?, mPacketDescriptionCount: UInt32)
```