我想使用 AVAudioEngine 录制音频文件,从麦克风到输出文件。之后我会添加一些效果,但现在我只想让它工作。
有人可以提供给我步骤或示例代码吗,以便我可以开始吗?
这是我的简单解决方案。输出文件将位于文档目录中。请注意,为了简洁起见,我删除了错误处理。
var engine = AVAudioEngine()
var file: AVAudioFile?
var player = AVAudioPlayerNode() // if you need play record later
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
file = AVAudioFile(forWriting: URLFor("my_file.caf")!, settings: engine.inputNode.inputFormatForBus(0).settings, error: nil)
engine.attachNode(player)
engine.connect(player, to: engine.mainMixerNode, format: engine.mainMixerNode.outputFormatForBus(0)) //configure graph
engine.startAndReturnError(nil)
}
func record() {
engine.inputNode.installTap(onBus: 0, bufferSize: 1024, format: engine.mainMixerNode.outputFormat(forBus: 0)) { (buffer, time) -> Void in
try! self.file?.write(from: buffer)
return
}
}
@IBAction func stop(sender: AnyObject) {
engine.inputNode.removeTap(onBus: 0)
}
func URLFor(filename: String) -> NSURL? {
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
return documentsDirectory.appendingPathComponent(filename)
}