如何使用swift同步核心音频的输入和播放

import AVFoundation

let audioSession = AVAudioSession.sharedInstance()
do {
    try audioSession.setCategory(.playAndRecord, mode: .default)
    try audioSession.setActive(true)
} catch {
    print("Failed to set audio session category.")
}

let audioEngine = AVAudioEngine()
let audioInputNode = audioEngine.inputNode

let audioOutputNode = audioEngine.outputNode
let mainMixer = audioEngine.mainMixerNode
audioEngine.connect(audioInputNode, to: mainMixer, format: nil)
audioEngine.connect(mainMixer, to: audioOutputNode, format: nil)

do {
    try audioEngine.start()
} catch {
    print("Failed to start audio engine.")
}

audioInputNode.installTap(onBus: 0, bufferSize: 1024, format: audioInputNode.inputFormat(forBus: 0)) { (buffer, time) in
    // 处理音频输入数据
}

let audioPlayerNode = AVAudioPlayerNode()
audioEngine.attach(audioPlayerNode)
audioEngine.connect(audioPlayerNode, to: mainMixer, format: nil)

audioPlayerNode.installTap(onBus: 0, bufferSize: 1024, format: mainMixer.outputFormat(forBus: 0)) { (buffer, time) in
    // 处理音频播放数据
}