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March 28, 2021 14:41
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Samplem4a
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// | |
// ViewController.swift | |
// Samplem4a | |
// | |
// Created by 永田大祐 on 2021/03/28. | |
// | |
import UIKit | |
import AVFoundation | |
class ViewController: UIViewController { | |
private var btPlay = UIButton() | |
private var btRecord = UIButton() | |
private var player = AudioEnginePlayer() | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
btPlay.frame = CGRect(x: 0, | |
y: view.frame.height - 200, | |
width: self.view.frame.width, | |
height: 100) | |
btPlay.addTarget(self, action: #selector(playBack), for: .touchUpInside) | |
btPlay.setTitle("Play", for: .normal) | |
btPlay.setTitleColor(.black, for: .normal) | |
view.addSubview(btPlay) | |
btRecord.frame = CGRect(x: 0, | |
y: view.frame.height - 100, | |
width: self.view.frame.width, | |
height: 100) | |
btRecord.addTarget(self, action: #selector(record), for: .touchUpInside) | |
btRecord.setTitle("Record", for: .normal) | |
btRecord.setTitleColor(.black, for: .normal) | |
view.addSubview(btRecord) | |
} | |
@objc func playBack() { | |
player.stop() | |
player.play() | |
} | |
@objc func record() { | |
player.stop() | |
player.record() | |
} | |
} | |
class AudioEnginePlayer { | |
var audioPlayerNode: AVAudioPlayerNode = AVAudioPlayerNode() | |
var audioEngine: AVAudioEngine = AVAudioEngine() | |
private var audioFile: AVAudioFile? | |
private var session = AVAudioSession.sharedInstance() | |
init() { | |
setFile(url: getAudioFileUrl()) | |
} | |
func play() { | |
guard !audioEngine.isRunning, audioFile == nil else { return } | |
do { | |
let audioFile = try AVAudioFile(forReading: getAudioFileUrl()) | |
audioPlayerNode.scheduleFile(audioFile, at: nil, completionHandler: nil) | |
try audioEngine.start() | |
audioPlayerNode.play() | |
} catch let error { | |
print(error) | |
} | |
} | |
func record() { | |
setFile(url: getAudioFileUrl()) | |
audioEngine.inputNode.installTap(onBus: 0, bufferSize: 1024, format: audioEngine.inputNode.outputFormat(forBus: 0)) { [self] (buffer, time) in | |
do { | |
try audioFile?.write(from: buffer) | |
} catch let error { | |
print(error, "error") | |
} | |
} | |
setUrl() | |
} | |
// audioFile = nilをしないとファイルが動作しない | |
func stop() { | |
audioPlayerNode.stop() | |
audioEngine.stop() | |
audioEngine.inputNode.removeTap(onBus: 0) | |
audioFile = nil | |
} | |
func getAudioFileUrl() -> URL { | |
let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask)[0] | |
return documentsDirectory.appendingPathComponent("sample.m4a") | |
} | |
private func setUrl() { | |
// Prepare AVAudioPlayerNode | |
audioEngine.attach(audioPlayerNode) | |
audioEngine.connect(audioPlayerNode, to: audioEngine.mainMixerNode, format: audioFile?.processingFormat) | |
do { | |
audioEngine.prepare() | |
try audioEngine.start() | |
} catch let error { | |
print(error) | |
} | |
} | |
private func setFile(url: URL) { | |
do { | |
let format = AVAudioFormat(commonFormat: .pcmFormatInt32 , sampleRate: AVAudioSession.sharedInstance().sampleRate, channels: 1 , interleaved: false) | |
audioFile = try AVAudioFile(forWriting:url, settings: format!.settings) | |
sessionEngine() | |
} catch let error { | |
print(error) | |
} | |
} | |
private func sessionEngine() { | |
do { | |
try session.setCategory(.playAndRecord, mode: .default, options: .defaultToSpeaker) | |
try session.overrideOutputAudioPort(.speaker) | |
try session.setPreferredSampleRate(AVAudioSession.sharedInstance().sampleRate) | |
try session.setActive(true) | |
} catch let error { | |
print("engine.start() error:", error) | |
} | |
} | |
} |
Author
DaisukeNagata
commented
Mar 28, 2021
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