Question

正如标题所述，我需要将音频数据从手机的麦克风路由到AirPods或其他具有AVAudioEngine的连接耳机。我已经能够从AirPods麦克风获得输入的这种工作方式，但是当我将AVAudioSession的首选输入源设置为内置iPhone麦克风时，没有任何输出。

我的代码的一些相关摘要：

try AVAudioSession.sharedInstance().setCategory(.playAndRecord, options: [.allowBluetooth])
try AVAudioSession.sharedInstance().setMode(.voiceChat)

if let phoneMicIndex = AVAudioSession.sharedInstance().availableInputs?.firstIndex(where: { $0.portType == .builtInMic }) {
    try AVAudioSession.sharedInstance().setPreferredInput(AVAudioSession.sharedInstance().availableInputs?[phoneMicIndex])
}

self.audioEngine.connect(self.audioEngine.inputNode, to: drc, format: self.audioEngine.inputNode.outputFormat(forBus: Config.bus))
self.audioEngine.connect(drc, to: self.audioEngine.mainMixerNode, format: self.audioEngine.outputNode.outputFormat(forBus: Config.bus))

// drc is just an audio unit...

self.audioEngine.inputNode.installTap(onBus: Config.bus, bufferSize: AVAudioFrameCount(Config.bufferSize), format: self.audioEngine.inputNode.inputFormat(forBus: Config.bus), block: { (buffer: AVAudioPCMBuffer, time: AVAudioTime) in
    // I get audio data here, it just isn't played out via the AirPods...
})

通过AVAudioEngine使用电话麦克风作为输入并使用AirPods /耳机作为输出

0 个答案: