Clever Geek Handbook

AudioBufferList highlights in Swift

I am struggling with this API and syntax in Swift

audioBufferList = AudioBufferList(mNumberBuffers: 2, mBuffers: (AudioBuffer))

I don't know what (AudioBuffer) with () means? Any ideas and how to initialize them? This is from the headers:

  public struct AudioBufferList {

      public var mNumberBuffers: UInt32
      public var mBuffers: (AudioBuffer) // this is a variable length array of mNumberBuffers elements
      public init()
      public init(mNumberBuffers: UInt32, mBuffers: (AudioBuffer))
 }
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Here is one way to initialize an AudioBufferList with one empty array, a mono buffer that you can pass to Audio Unit calls such as AudioUnitRender (), which then allocates and fills the buffer as needed:



var bufferList = AudioBufferList(
        mNumberBuffers: 1,
        mBuffers: AudioBuffer(
            mNumberChannels: UInt32(1),
            mDataByteSize: 1024,
            mData: nil))
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