ios - 将 C 指针转换为 Swift 3

Question

我有代码:

let data = Data(bytes: UnsafePointer<UInt8>(audioBuffer.mData), count: Int(bufferSize))

和

let u16 = UnsafePointer<Int32>(audioBuffer.mData).pointee

两者都可以在 Swift 2.3 中工作，但不能在 Swift 3 中工作。如何转换它们以使它们的行为等效？ (为什么？)

Answer 1

要从 Swift 3 中的音频单元回调缓冲区读取 16 位音频样本，我使用:

let bufferPointer = UnsafeMutableRawPointer(mBuffers.mData)
if var bptr = bufferPointer {
  for i in 0..<(Int(frameCount)) {
    let oneSampleI16 = bptr.assumingMemoryBound(to: Int16.self).pointee
    // do something with the audio sample
    bptr += 1
  }
}

Audio Session 和音频单元代码的其余部分如下:https://gist.github.com/hotpaw2/630a466cc830e3d129b9