├── README.md ├── CoreAudioExamples ├── Assets.xcassets │ ├── Contents.json │ ├── AccentColor.colorset │ │ └── Contents.json │ └── AppIcon.appiconset │ │ └── Contents.json ├── MenuItemCell.swift ├── Samples │ ├── AudioUnitGenerateWave │ │ ├── AudioUnitGenerateWaveViewController.swift │ │ ├── AudioUnitGenerateWave.storyboard │ │ └── AudioUnitWaveGenerator.swift │ ├── AudioEngeneGenerateWave │ │ ├── AudioEngeneGenerateWaveViewController.swift │ │ ├── AudioEngeneWaveGenerator.swift │ │ └── AudioEngeneGenerateWave.storyboard │ ├── Synthesizer │ │ ├── SynthesizerViewController.swift │ │ ├── Synthesizer.swift │ │ └── Synthesizer.storyboard │ └── AudioUnitRecording │ │ ├── Base.lproj │ │ └── AudioUnitRecording.storyboard │ │ ├── AudioUnitRecordingViewController.swift │ │ ├── AudioWriter.swift │ │ └── AudioUnitRecorder.swift ├── MenuViewController.swift ├── AppDelegate.swift ├── MenuDataSource.swift ├── Base.lproj │ └── LaunchScreen.storyboard ├── Info.plist ├── SceneDelegate.swift └── Main.storyboard ├── CoreAudioExamples.xcodeproj ├── project.xcworkspace │ ├── contents.xcworkspacedata │ └── xcshareddata │ │ └── IDEWorkspaceChecks.plist ├── xcuserdata │ └── tokyomac.xcuserdatad │ │ └── xcschemes │ │ └── xcschememanagement.plist └── project.pbxproj ├── CoreAudioExamplesTests ├── Info.plist └── CoreAudioExamplesTests.swift ├── CoreAudioExamplesUITests ├── Info.plist └── CoreAudioExamplesUITests.swift └── .gitignore /README.md: -------------------------------------------------------------------------------- 1 | # CoreAudioExamples 2 | -------------------------------------------------------------------------------- /CoreAudioExamples/Assets.xcassets/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "info" : { 3 | "author" : "xcode", 4 | "version" : 1 5 | } 6 | } 7 | -------------------------------------------------------------------------------- /CoreAudioExamples.xcodeproj/project.xcworkspace/contents.xcworkspacedata: -------------------------------------------------------------------------------- 1 | 2 | 4 | 6 | 7 | 8 | -------------------------------------------------------------------------------- /CoreAudioExamples/Assets.xcassets/AccentColor.colorset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "colors" : [ 3 | { 4 | "idiom" : "universal" 5 | } 6 | ], 7 | "info" : { 8 | "author" : "xcode", 9 | "version" : 1 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /CoreAudioExamples.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | IDEDidComputeMac32BitWarning 6 | 7 | 8 | 9 | -------------------------------------------------------------------------------- /CoreAudioExamples.xcodeproj/xcuserdata/tokyomac.xcuserdatad/xcschemes/xcschememanagement.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | SchemeUserState 6 | 7 | CoreAudioExamples.xcscheme_^#shared#^_ 8 | 9 | orderHint 10 | 0 11 | 12 | 13 | 14 | 15 | -------------------------------------------------------------------------------- /CoreAudioExamples/MenuItemCell.swift: -------------------------------------------------------------------------------- 1 | // 2 | // MenuItemTableViewCell.swift 3 | // ExampleOfiOSLiDAR 4 | // 5 | // Created by TokyoYoshida on 2021/01/31. 6 | // 7 | 8 | import UIKit 9 | 10 | class MenuItemCell: UITableViewCell { 11 | @IBOutlet weak var titleLabel: UILabel! 12 | @IBOutlet weak var descriptionLabel: UILabel! 13 | 14 | override func awakeFromNib() { 15 | super.awakeFromNib() 16 | } 17 | 18 | override func setSelected(_ selected: Bool, animated: Bool) { 19 | super.setSelected(selected, animated: animated) 20 | } 21 | 22 | func update(item: MenuItem) { 23 | titleLabel.text = item.title 24 | descriptionLabel.text = item.description 25 | } 26 | } 27 | -------------------------------------------------------------------------------- /CoreAudioExamplesTests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | 22 | 23 | -------------------------------------------------------------------------------- /CoreAudioExamplesUITests/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | 22 | 23 | -------------------------------------------------------------------------------- /CoreAudioExamplesTests/CoreAudioExamplesTests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreAudioExamplesTests.swift 3 | // CoreAudioExamplesTests 4 | // 5 | // Created by TokyoYoshida on 2021/03/05. 6 | // 7 | 8 | import XCTest 9 | @testable import CoreAudioExamples 10 | 11 | class CoreAudioExamplesTests: XCTestCase { 12 | 13 | override func setUpWithError() throws { 14 | // Put setup code here. This method is called before the invocation of each test method in the class. 15 | } 16 | 17 | override func tearDownWithError() throws { 18 | // Put teardown code here. This method is called after the invocation of each test method in the class. 19 | } 20 | 21 | func testExample() throws { 22 | // This is an example of a functional test case. 23 | // Use XCTAssert and related functions to verify your tests produce the correct results. 24 | } 25 | 26 | func testPerformanceExample() throws { 27 | // This is an example of a performance test case. 28 | self.measure { 29 | // Put the code you want to measure the time of here. 30 | } 31 | } 32 | 33 | } 34 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitGenerateWave/AudioUnitGenerateWaveViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // GenerateWaveViewController.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/18. 6 | // 7 | 8 | import UIKit 9 | 10 | class GenerateWaveViewController: UIViewController { 11 | @IBOutlet weak var playButton: UIButton! 12 | var isPlaying = false 13 | let waveGenerator = AudioUnitWaveGenerator() 14 | 15 | override func viewDidLoad() { 16 | super.viewDidLoad() 17 | 18 | waveGenerator.prepare() 19 | // Do any additional setup after loading the view. 20 | } 21 | 22 | override func viewDidDisappear(_ animated: Bool) { 23 | super.viewDidDisappear(animated) 24 | 25 | waveGenerator.dispose() 26 | } 27 | 28 | @IBAction func tappedPlayButton(_ sender: Any) { 29 | func start() { 30 | playButton.setTitle("Stop", for: .normal) 31 | waveGenerator.start() 32 | } 33 | func stop() { 34 | playButton.setTitle("Play", for: .normal) 35 | waveGenerator.stop() 36 | } 37 | if isPlaying { 38 | isPlaying = false 39 | stop() 40 | } else { 41 | isPlaying = true 42 | start() 43 | } 44 | } 45 | } 46 | -------------------------------------------------------------------------------- /CoreAudioExamples/MenuViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // MenuViewController.swift 3 | // ExampleOfiOSLiDAR 4 | // 5 | // Created by TokyoYoshida on 2021/01/31. 6 | // 7 | 8 | import UIKit 9 | 10 | class MenuViewController: UITableViewController { 11 | let viewModel = MenuViewModel() 12 | 13 | override func viewDidLoad() { 14 | super.viewDidLoad() 15 | } 16 | 17 | override func numberOfSections(in tableView: UITableView) -> Int { 18 | return 1 19 | } 20 | 21 | override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int { 22 | return viewModel.count 23 | } 24 | 25 | override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell { 26 | let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath) as! MenuItemCell 27 | 28 | let item = viewModel.item(row: indexPath.row) 29 | cell.update(item: item) 30 | 31 | return cell 32 | } 33 | 34 | override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) { 35 | let vc = viewModel.viewController(row: indexPath.row) 36 | 37 | navigationController?.pushViewController(vc, animated: true) 38 | 39 | tableView.deselectRow(at: indexPath, animated: true) 40 | } 41 | } 42 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioEngeneGenerateWave/AudioEngeneGenerateWaveViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioEngeneGenerateWaveViewController.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/20. 6 | // 7 | 8 | import UIKit 9 | 10 | class AudioEngeneGenerateWaveViewController: UIViewController { 11 | @IBOutlet weak var playButton: UIButton! 12 | var isPlaying = false 13 | let waveGenerator = AudioEngeneWaveGenerator() 14 | 15 | override func viewDidLoad() { 16 | super.viewDidLoad() 17 | 18 | waveGenerator.prepare() 19 | // Do any additional setup after loading the view. 20 | } 21 | 22 | override func viewDidDisappear(_ animated: Bool) { 23 | super.viewDidDisappear(animated) 24 | 25 | waveGenerator.dispose() 26 | } 27 | 28 | @IBAction func tappedPlayButton(_ sender: Any) { 29 | func start() { 30 | playButton.setTitle("Stop", for: .normal) 31 | waveGenerator.start() 32 | } 33 | func stop() { 34 | playButton.setTitle("Play", for: .normal) 35 | waveGenerator.stop() 36 | } 37 | if isPlaying { 38 | isPlaying = false 39 | stop() 40 | } else { 41 | isPlaying = true 42 | start() 43 | } 44 | } 45 | } 46 | -------------------------------------------------------------------------------- /CoreAudioExamples/AppDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AppDelegate.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/05. 6 | // 7 | 8 | import UIKit 9 | 10 | @main 11 | class AppDelegate: UIResponder, UIApplicationDelegate { 12 | 13 | 14 | 15 | func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool { 16 | // Override point for customization after application launch. 17 | return true 18 | } 19 | 20 | // MARK: UISceneSession Lifecycle 21 | 22 | func application(_ application: UIApplication, configurationForConnecting connectingSceneSession: UISceneSession, options: UIScene.ConnectionOptions) -> UISceneConfiguration { 23 | // Called when a new scene session is being created. 24 | // Use this method to select a configuration to create the new scene with. 25 | return UISceneConfiguration(name: "Default Configuration", sessionRole: connectingSceneSession.role) 26 | } 27 | 28 | func application(_ application: UIApplication, didDiscardSceneSessions sceneSessions: Set) { 29 | // Called when the user discards a scene session. 30 | // If any sessions were discarded while the application was not running, this will be called shortly after application:didFinishLaunchingWithOptions. 31 | // Use this method to release any resources that were specific to the discarded scenes, as they will not return. 32 | } 33 | 34 | 35 | } 36 | 37 | -------------------------------------------------------------------------------- /CoreAudioExamplesUITests/CoreAudioExamplesUITests.swift: -------------------------------------------------------------------------------- 1 | // 2 | // CoreAudioExamplesUITests.swift 3 | // CoreAudioExamplesUITests 4 | // 5 | // Created by TokyoYoshida on 2021/03/05. 6 | // 7 | 8 | import XCTest 9 | 10 | class CoreAudioExamplesUITests: XCTestCase { 11 | 12 | override func setUpWithError() throws { 13 | // Put setup code here. This method is called before the invocation of each test method in the class. 14 | 15 | // In UI tests it is usually best to stop immediately when a failure occurs. 16 | continueAfterFailure = false 17 | 18 | // In UI tests it’s important to set the initial state - such as interface orientation - required for your tests before they run. The setUp method is a good place to do this. 19 | } 20 | 21 | override func tearDownWithError() throws { 22 | // Put teardown code here. This method is called after the invocation of each test method in the class. 23 | } 24 | 25 | func testExample() throws { 26 | // UI tests must launch the application that they test. 27 | let app = XCUIApplication() 28 | app.launch() 29 | 30 | // Use recording to get started writing UI tests. 31 | // Use XCTAssert and related functions to verify your tests produce the correct results. 32 | } 33 | 34 | func testLaunchPerformance() throws { 35 | if #available(macOS 10.15, iOS 13.0, tvOS 13.0, *) { 36 | // This measures how long it takes to launch your application. 37 | measure(metrics: [XCTApplicationLaunchMetric()]) { 38 | XCUIApplication().launch() 39 | } 40 | } 41 | } 42 | } 43 | -------------------------------------------------------------------------------- /CoreAudioExamples/MenuDataSource.swift: -------------------------------------------------------------------------------- 1 | // 2 | // MenuDataSource.swift 3 | // ExampleOfiOSLiDAR 4 | // 5 | // Created by TokyoYoshida on 2021/01/31. 6 | // 7 | 8 | import UIKit 9 | 10 | struct MenuItem { 11 | let title: String 12 | let description: String 13 | let prefix: String 14 | 15 | func viewController() -> UIViewController { 16 | let storyboard = UIStoryboard(name: prefix, bundle: nil) 17 | let vc = storyboard.instantiateInitialViewController()! 18 | vc.title = title 19 | 20 | return vc 21 | } 22 | } 23 | 24 | class MenuViewModel { 25 | private let dataSource = [ 26 | MenuItem ( 27 | title: "AudioUnit Recording", 28 | description: "Sound recording using AudioUnit.", 29 | prefix: "AudioUnitRecording" 30 | ), 31 | MenuItem ( 32 | title: "AudioUnit Generate Wave", 33 | description: "Generate sin wave using AudioUnit.", 34 | prefix: "AudioUnitGenerateWave" 35 | ), 36 | MenuItem ( 37 | title: "AVAudioEngene Generate Wave", 38 | description: "Generate sin wave using AVAudioEngene.", 39 | prefix: "AudioEngeneGenerateWave" 40 | ), 41 | MenuItem ( 42 | title: "Synthesizer", 43 | description: "Synthesizer using AVAudioEngene.", 44 | prefix: "Synthesizer" 45 | ) 46 | ] 47 | 48 | var count: Int { 49 | dataSource.count 50 | } 51 | 52 | func item(row: Int) -> MenuItem { 53 | dataSource[row] 54 | } 55 | 56 | func viewController(row: Int) -> UIViewController { 57 | dataSource[row].viewController() 58 | } 59 | } 60 | -------------------------------------------------------------------------------- /CoreAudioExamples/Base.lproj/LaunchScreen.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | -------------------------------------------------------------------------------- /CoreAudioExamples/Assets.xcassets/AppIcon.appiconset/Contents.json: -------------------------------------------------------------------------------- 1 | { 2 | "images" : [ 3 | { 4 | "idiom" : "iphone", 5 | "scale" : "2x", 6 | "size" : "20x20" 7 | }, 8 | { 9 | "idiom" : "iphone", 10 | "scale" : "3x", 11 | "size" : "20x20" 12 | }, 13 | { 14 | "idiom" : "iphone", 15 | "scale" : "2x", 16 | "size" : "29x29" 17 | }, 18 | { 19 | "idiom" : "iphone", 20 | "scale" : "3x", 21 | "size" : "29x29" 22 | }, 23 | { 24 | "idiom" : "iphone", 25 | "scale" : "2x", 26 | "size" : "40x40" 27 | }, 28 | { 29 | "idiom" : "iphone", 30 | "scale" : "3x", 31 | "size" : "40x40" 32 | }, 33 | { 34 | "idiom" : "iphone", 35 | "scale" : "2x", 36 | "size" : "60x60" 37 | }, 38 | { 39 | "idiom" : "iphone", 40 | "scale" : "3x", 41 | "size" : "60x60" 42 | }, 43 | { 44 | "idiom" : "ipad", 45 | "scale" : "1x", 46 | "size" : "20x20" 47 | }, 48 | { 49 | "idiom" : "ipad", 50 | "scale" : "2x", 51 | "size" : "20x20" 52 | }, 53 | { 54 | "idiom" : "ipad", 55 | "scale" : "1x", 56 | "size" : "29x29" 57 | }, 58 | { 59 | "idiom" : "ipad", 60 | "scale" : "2x", 61 | "size" : "29x29" 62 | }, 63 | { 64 | "idiom" : "ipad", 65 | "scale" : "1x", 66 | "size" : "40x40" 67 | }, 68 | { 69 | "idiom" : "ipad", 70 | "scale" : "2x", 71 | "size" : "40x40" 72 | }, 73 | { 74 | "idiom" : "ipad", 75 | "scale" : "1x", 76 | "size" : "76x76" 77 | }, 78 | { 79 | "idiom" : "ipad", 80 | "scale" : "2x", 81 | "size" : "76x76" 82 | }, 83 | { 84 | "idiom" : "ipad", 85 | "scale" : "2x", 86 | "size" : "83.5x83.5" 87 | }, 88 | { 89 | "idiom" : "ios-marketing", 90 | "scale" : "1x", 91 | "size" : "1024x1024" 92 | } 93 | ], 94 | "info" : { 95 | "author" : "xcode", 96 | "version" : 1 97 | } 98 | } 99 | -------------------------------------------------------------------------------- /CoreAudioExamples/Info.plist: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | CFBundleDevelopmentRegion 6 | $(DEVELOPMENT_LANGUAGE) 7 | CFBundleExecutable 8 | $(EXECUTABLE_NAME) 9 | CFBundleIdentifier 10 | $(PRODUCT_BUNDLE_IDENTIFIER) 11 | CFBundleInfoDictionaryVersion 12 | 6.0 13 | CFBundleName 14 | $(PRODUCT_NAME) 15 | CFBundlePackageType 16 | $(PRODUCT_BUNDLE_PACKAGE_TYPE) 17 | CFBundleShortVersionString 18 | 1.0 19 | CFBundleVersion 20 | 1 21 | LSRequiresIPhoneOS 22 | 23 | UIApplicationSceneManifest 24 | 25 | UIApplicationSupportsMultipleScenes 26 | 27 | UISceneConfigurations 28 | 29 | UIWindowSceneSessionRoleApplication 30 | 31 | 32 | UISceneConfigurationName 33 | Default Configuration 34 | UISceneDelegateClassName 35 | $(PRODUCT_MODULE_NAME).SceneDelegate 36 | UISceneStoryboardFile 37 | Main 38 | 39 | 40 | 41 | 42 | UIApplicationSupportsIndirectInputEvents 43 | 44 | UILaunchStoryboardName 45 | LaunchScreen 46 | UIMainStoryboardFile 47 | Main 48 | UIRequiredDeviceCapabilities 49 | 50 | armv7 51 | 52 | UISupportedInterfaceOrientations 53 | 54 | UIInterfaceOrientationPortrait 55 | UIInterfaceOrientationLandscapeLeft 56 | UIInterfaceOrientationLandscapeRight 57 | 58 | UISupportedInterfaceOrientations~ipad 59 | 60 | UIInterfaceOrientationPortrait 61 | UIInterfaceOrientationPortraitUpsideDown 62 | UIInterfaceOrientationLandscapeLeft 63 | UIInterfaceOrientationLandscapeRight 64 | 65 | NSMicrophoneUsageDescription 66 | Recording required. 67 | 68 | 69 | -------------------------------------------------------------------------------- /CoreAudioExamples/SceneDelegate.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SceneDelegate.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/05. 6 | // 7 | 8 | import UIKit 9 | 10 | class SceneDelegate: UIResponder, UIWindowSceneDelegate { 11 | 12 | var window: UIWindow? 13 | 14 | 15 | func scene(_ scene: UIScene, willConnectTo session: UISceneSession, options connectionOptions: UIScene.ConnectionOptions) { 16 | // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`. 17 | // If using a storyboard, the `window` property will automatically be initialized and attached to the scene. 18 | // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead). 19 | guard let _ = (scene as? UIWindowScene) else { return } 20 | } 21 | 22 | func sceneDidDisconnect(_ scene: UIScene) { 23 | // Called as the scene is being released by the system. 24 | // This occurs shortly after the scene enters the background, or when its session is discarded. 25 | // Release any resources associated with this scene that can be re-created the next time the scene connects. 26 | // The scene may re-connect later, as its session was not necessarily discarded (see `application:didDiscardSceneSessions` instead). 27 | } 28 | 29 | func sceneDidBecomeActive(_ scene: UIScene) { 30 | // Called when the scene has moved from an inactive state to an active state. 31 | // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive. 32 | } 33 | 34 | func sceneWillResignActive(_ scene: UIScene) { 35 | // Called when the scene will move from an active state to an inactive state. 36 | // This may occur due to temporary interruptions (ex. an incoming phone call). 37 | } 38 | 39 | func sceneWillEnterForeground(_ scene: UIScene) { 40 | // Called as the scene transitions from the background to the foreground. 41 | // Use this method to undo the changes made on entering the background. 42 | } 43 | 44 | func sceneDidEnterBackground(_ scene: UIScene) { 45 | // Called as the scene transitions from the foreground to the background. 46 | // Use this method to save data, release shared resources, and store enough scene-specific state information 47 | // to restore the scene back to its current state. 48 | } 49 | 50 | 51 | } 52 | 53 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioEngeneGenerateWave/AudioEngeneWaveGenerator.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioEngeneWaveGenerator.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/20. 6 | // 7 | 8 | import Foundation 9 | import AVFoundation 10 | 11 | class AudioEngeneWaveGenerator { 12 | var audioUnit: AudioUnit? 13 | var audioEngine: AVAudioEngine = AVAudioEngine() 14 | var sampleRate: Float = 44100.0 15 | var time: Float = 0 16 | var deltaTime: Float = 0 17 | static let toneA: Float = 440.0 18 | var mainMixer: AVAudioMixerNode? 19 | var outputNode: AVAudioOutputNode? 20 | var format: AVAudioFormat? 21 | 22 | lazy var sourceNode = AVAudioSourceNode { [self] (_, _, frameCount, audioBufferList) -> OSStatus in 23 | let abl = UnsafeMutableAudioBufferListPointer(audioBufferList) 24 | for frame in 0.. = UnsafeMutableBufferPointer(buffer) 29 | buf[frame] = sampleVal 30 | } 31 | } 32 | return noErr 33 | } 34 | 35 | class RefConData { 36 | var frame: Float = 0 37 | } 38 | var refData: RefConData = RefConData() 39 | 40 | 41 | func prepare() { 42 | func initAudioEngene() { 43 | mainMixer = audioEngine.mainMixerNode 44 | outputNode = audioEngine.outputNode 45 | format = outputNode!.inputFormat(forBus: 0) 46 | 47 | 48 | sampleRate = Float(format!.sampleRate) 49 | deltaTime = 1 / Float(sampleRate) 50 | 51 | } 52 | initAudioEngene() 53 | } 54 | 55 | func start() { 56 | refData.frame = 0 57 | let inputFormat = AVAudioFormat(commonFormat: format!.commonFormat, sampleRate: Double(sampleRate), channels: 1, interleaved: format!.isInterleaved) 58 | audioEngine.attach(sourceNode) 59 | audioEngine.connect(sourceNode, to: mainMixer!, format: inputFormat!) 60 | audioEngine.connect(mainMixer!, to: outputNode!, format: nil) 61 | mainMixer?.outputVolume = 1 62 | 63 | do { 64 | try audioEngine.start() 65 | } catch { 66 | fatalError("Coud not start engine: \(error.localizedDescription)") 67 | } 68 | } 69 | 70 | func stop() { 71 | audioEngine.stop() 72 | } 73 | 74 | func dispose() { 75 | stop() 76 | } 77 | } 78 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/Synthesizer/SynthesizerViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // SynthesizerViewController.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/20. 6 | // 7 | 8 | import UIKit 9 | 10 | class SynthesizerViewController: UIViewController { 11 | enum EffectorSwitch: Int { 12 | case Delay = 0 13 | case Phaser 14 | case Flanger 15 | case Distortion 16 | } 17 | @IBOutlet weak var playButton: UIButton! 18 | var isPlaying = false 19 | let waveGenerator = Synthesizer() 20 | var mixer = AudioMixer(TriangleOscillator()) 21 | 22 | override func viewDidLoad() { 23 | super.viewDidLoad() 24 | 25 | waveGenerator.prepare() 26 | // Do any additional setup after loading the view. 27 | } 28 | 29 | override func viewDidDisappear(_ animated: Bool) { 30 | super.viewDidDisappear(animated) 31 | 32 | waveGenerator.dispose() 33 | } 34 | 35 | @IBAction func tappedPlayButton(_ sender: Any) { 36 | func start() { 37 | playButton.setTitle("Stop", for: .normal) 38 | // mixer.addEffector(effector: FlangerEffector()) 39 | // mixer.addEffector(effector: DelayEffector()) 40 | waveGenerator.setAudioSource(audioSource: mixer) 41 | waveGenerator.start() 42 | waveGenerator.volume = 0.5 43 | } 44 | func stop() { 45 | playButton.setTitle("Play", for: .normal) 46 | waveGenerator.stop() 47 | } 48 | if isPlaying { 49 | isPlaying = false 50 | stop() 51 | } else { 52 | isPlaying = true 53 | start() 54 | } 55 | } 56 | 57 | @IBAction func movedSlider(_ sender: UISlider) { 58 | waveGenerator.volume = sender.value 59 | } 60 | 61 | @IBAction func movedTone(_ sender: UISlider) { 62 | let toneA0: Float = 27.50 63 | let toneA5: Float = 880.0 64 | 65 | waveGenerator.tone = (toneA5-toneA0) * sender.value + toneA0 66 | } 67 | 68 | @IBAction func tappedOscillator(_ sender: UISegmentedControl) { 69 | if sender.selectedSegmentIndex == 0 { 70 | mixer.setOscillator(oscillator: SinOscillator()) 71 | } else { 72 | mixer.setOscillator(oscillator: TriangleOscillator()) 73 | } 74 | } 75 | 76 | @IBAction func tappedEffector(_ sender: UISwitch) { 77 | let selectedSwitch = EffectorSwitch(rawValue: sender.tag) 78 | var effector: Effector 79 | switch selectedSwitch { 80 | case .Delay: 81 | effector = DelayEffector() 82 | case .Phaser: 83 | effector = PhaserEffector() 84 | case .Flanger: 85 | effector = FlangerEffector() 86 | case .Distortion: 87 | effector = DistortionEffector() 88 | case .none: 89 | return 90 | } 91 | if sender.isOn { 92 | mixer.addEffector(index: sender.tag, effector: effector) 93 | } else { 94 | mixer.removeEffector(at: sender.tag) 95 | } 96 | } 97 | } 98 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | ### https://raw.github.com/github/gitignore/e931ef7f3e7d8f7aa0e784c14bd291ad4448b1ab/Swift.gitignore 2 | 3 | # Xcode 4 | # 5 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 6 | 7 | ## User settings 8 | xcuserdata/ 9 | 10 | ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) 11 | *.xcscmblueprint 12 | *.xccheckout 13 | 14 | ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) 15 | build/ 16 | DerivedData/ 17 | *.moved-aside 18 | *.pbxuser 19 | !default.pbxuser 20 | *.mode1v3 21 | !default.mode1v3 22 | *.mode2v3 23 | !default.mode2v3 24 | *.perspectivev3 25 | !default.perspectivev3 26 | 27 | ## Obj-C/Swift specific 28 | *.hmap 29 | 30 | ## App packaging 31 | *.ipa 32 | *.dSYM.zip 33 | *.dSYM 34 | 35 | ## Playgrounds 36 | timeline.xctimeline 37 | playground.xcworkspace 38 | 39 | # Swift Package Manager 40 | # 41 | # Add this line if you want to avoid checking in source code from Swift Package Manager dependencies. 42 | # Packages/ 43 | # Package.pins 44 | # Package.resolved 45 | # *.xcodeproj 46 | # 47 | # Xcode automatically generates this directory with a .xcworkspacedata file and xcuserdata 48 | # hence it is not needed unless you have added a package configuration file to your project 49 | # .swiftpm 50 | 51 | .build/ 52 | 53 | # CocoaPods 54 | # 55 | # We recommend against adding the Pods directory to your .gitignore. However 56 | # you should judge for yourself, the pros and cons are mentioned at: 57 | # https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control 58 | # 59 | # Pods/ 60 | # 61 | # Add this line if you want to avoid checking in source code from the Xcode workspace 62 | # *.xcworkspace 63 | 64 | # Carthage 65 | # 66 | # Add this line if you want to avoid checking in source code from Carthage dependencies. 67 | # Carthage/Checkouts 68 | 69 | Carthage/Build/ 70 | 71 | # Accio dependency management 72 | Dependencies/ 73 | .accio/ 74 | 75 | # fastlane 76 | # 77 | # It is recommended to not store the screenshots in the git repo. 78 | # Instead, use fastlane to re-generate the screenshots whenever they are needed. 79 | # For more information about the recommended setup visit: 80 | # https://docs.fastlane.tools/best-practices/source-control/#source-control 81 | 82 | fastlane/report.xml 83 | fastlane/Preview.html 84 | fastlane/screenshots/**/*.png 85 | fastlane/test_output 86 | 87 | # Code Injection 88 | # 89 | # After new code Injection tools there's a generated folder /iOSInjectionProject 90 | # https://github.com/johnno1962/injectionforxcode 91 | 92 | iOSInjectionProject/ 93 | 94 | 95 | ### https://raw.github.com/github/gitignore/e931ef7f3e7d8f7aa0e784c14bd291ad4448b1ab/Global/Xcode.gitignore 96 | 97 | # Xcode 98 | # 99 | # gitignore contributors: remember to update Global/Xcode.gitignore, Objective-C.gitignore & Swift.gitignore 100 | 101 | ## User settings 102 | xcuserdata/ 103 | 104 | ## compatibility with Xcode 8 and earlier (ignoring not required starting Xcode 9) 105 | *.xcscmblueprint 106 | *.xccheckout 107 | 108 | ## compatibility with Xcode 3 and earlier (ignoring not required starting Xcode 4) 109 | build/ 110 | DerivedData/ 111 | *.moved-aside 112 | *.pbxuser 113 | !default.pbxuser 114 | *.mode1v3 115 | !default.mode1v3 116 | *.mode2v3 117 | !default.mode2v3 118 | *.perspectivev3 119 | !default.perspectivev3 120 | 121 | ## Gcc Patch 122 | /*.gcno 123 | 124 | 125 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitGenerateWave/AudioUnitGenerateWave.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioEngeneGenerateWave/AudioEngeneGenerateWave.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitGenerateWave/AudioUnitWaveGenerator.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioUnitWaveGenerator.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/18. 6 | // 7 | 8 | import Foundation 9 | import AVFoundation 10 | 11 | class AudioUnitWaveGenerator { 12 | var audioUnit: AudioUnit? 13 | static let sampleRate: Float = 44100.0 14 | static let toneA: Float = 440.0 15 | class RefConData { 16 | var frame: Float = 0 17 | } 18 | var refData: RefConData = RefConData() 19 | 20 | let renderCallBack: AURenderCallback = {( 21 | inRefCon: UnsafeMutableRawPointer, 22 | ioActionFlags: UnsafeMutablePointer, 23 | inTimeStamp: UnsafePointer, 24 | inBusNumber: UInt32, 25 | inNumberFrames: UInt32, 26 | ioData: UnsafeMutablePointer?) -> OSStatus in 27 | 28 | let refData = unsafeBitCast( inRefCon, to: AudioUnitWaveGenerator.RefConData.self) 29 | 30 | let abl = UnsafeMutableAudioBufferListPointer(ioData) 31 | let capacity = Int(abl![0].mDataByteSize) / MemoryLayout.size 32 | 33 | if let buffer = abl![0].mData?.bindMemory(to: Float.self, capacity: capacity) { 34 | for i in 0...passRetained(refData).toOpaque() ) 60 | 61 | AudioUnitSetProperty(audioUnit!, kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input, 0, &callBackStruct, UInt32(MemoryLayout.size(ofValue: callBackStruct))) 62 | } 63 | func setAudioInputFormat() { 64 | var asbd = AudioStreamBasicDescription() 65 | 66 | asbd.mSampleRate = Float64(AudioUnitWaveGenerator.sampleRate) 67 | asbd.mFormatID = kAudioFormatLinearPCM 68 | asbd.mFormatFlags = kAudioFormatFlagIsFloat 69 | asbd.mChannelsPerFrame = 1 70 | asbd.mBytesPerPacket = UInt32(MemoryLayout.size) 71 | asbd.mBytesPerFrame = UInt32(MemoryLayout.size) 72 | asbd.mFramesPerPacket = 1 73 | asbd.mBitsPerChannel = UInt32(8 * MemoryLayout.size) 74 | asbd.mReserved = 0 75 | 76 | AudioUnitSetProperty(audioUnit!, kAudioUnitProperty_StreamFormat, kAudioUnitScope_Input, 0, &asbd, UInt32(MemoryLayout.size(ofValue: asbd))) 77 | } 78 | initAudioUnit() 79 | setRenderCallBack() 80 | setAudioInputFormat() 81 | } 82 | 83 | func start() { 84 | refData.frame = 0 85 | AudioOutputUnitStart(audioUnit!) 86 | } 87 | 88 | func stop() { 89 | AudioOutputUnitStop(audioUnit!) 90 | } 91 | 92 | func dispose() { 93 | AudioUnitUninitialize(audioUnit!) 94 | AudioComponentInstanceDispose(audioUnit!) 95 | } 96 | } 97 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitRecording/Base.lproj/AudioUnitRecording.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 27 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitRecording/AudioUnitRecordingViewController.swift: -------------------------------------------------------------------------------- 1 | // 2 | // ViewController.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/05. 6 | // 7 | 8 | import UIKit 9 | import AVFoundation 10 | import AudioToolbox 11 | 12 | let kOutputBus: UInt32 = 0; 13 | let kInputBus: UInt32 = 1; 14 | 15 | class AudioUnitRecordingViewController: UIViewController { 16 | @IBOutlet weak var recordButton: UIButton! 17 | @IBOutlet weak var playButton: UIButton! 18 | 19 | var audioRecorder: AVAudioRecorder! 20 | 21 | var audioEngine: AVAudioEngine! 22 | var avAudioFile: AVAudioFile! 23 | var audioPlayerNode: AVAudioPlayerNode! 24 | var isRecording: Bool = false 25 | 26 | // for Audio Unit 27 | var mPlayerGraph: AUGraph? 28 | var inputNode: AUNode = 0 29 | var mixerNode: AUNode = 0 30 | var inputNodeUnit: AudioUnit? 31 | var mixerNodeUnit: AudioUnit? 32 | var mBuffers: AudioBufferList? 33 | // for Extended audio file service 34 | let audioWriter = AudioWriter() 35 | let auidoUnitRecorder = AudioUnitRecorder() 36 | 37 | override func viewDidLoad() { 38 | func initAudioRecorder() { 39 | let session = AVAudioSession.sharedInstance() 40 | do { 41 | try session.setCategory(.playAndRecord, mode: .default) 42 | try session.setActive(true) 43 | 44 | auidoUnitRecorder.initializeAudioUnit() 45 | } catch let error { 46 | fatalError(error.localizedDescription) 47 | } 48 | } 49 | 50 | super.viewDidLoad() 51 | 52 | initAudioRecorder() 53 | } 54 | 55 | @IBAction func tappedRecord(_ sender: Any) { 56 | if !isRecording { 57 | isRecording = true 58 | do { 59 | try startRecroding() 60 | } catch (let error) { 61 | print(error) 62 | } 63 | recordButton.setTitle("Stop", for: .normal) 64 | } else { 65 | isRecording = false 66 | endRecording() 67 | recordButton.setTitle("Record", for: .normal) 68 | } 69 | } 70 | 71 | @IBAction func tappedPlay(_ sender: Any) { 72 | func initPlayer() { 73 | do { 74 | audioEngine = AVAudioEngine() 75 | avAudioFile = try AVAudioFile(forReading: getAudioFileUrl()) 76 | audioPlayerNode = AVAudioPlayerNode() 77 | 78 | audioEngine.attach(audioPlayerNode) 79 | audioEngine.connect(audioPlayerNode, to: audioEngine.outputNode, format: avAudioFile.processingFormat) 80 | } catch let error { 81 | fatalError(error.localizedDescription) 82 | } 83 | } 84 | initPlayer() 85 | do { 86 | if !audioPlayerNode.isPlaying { 87 | audioPlayerNode.stop() 88 | audioPlayerNode.scheduleFile(avAudioFile, at: nil, completionCallbackType: .dataPlayedBack) {_ in 89 | DispatchQueue.main.async { 90 | self.playButton.setTitle("Play", for: .normal) 91 | } 92 | } 93 | 94 | try audioEngine.start() 95 | audioPlayerNode.play() 96 | playButton.setTitle("Stop", for: .normal) 97 | } else { 98 | audioPlayerNode.stop() 99 | playButton.setTitle("Play", for: .normal) 100 | } 101 | } catch let error { 102 | fatalError(error.localizedDescription) 103 | } 104 | } 105 | 106 | func getAudioFileUrl() -> URL { 107 | let paths = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask) 108 | let docsDirect = paths[0] 109 | let audioUrl = docsDirect.appendingPathComponent("recording.wav") 110 | 111 | return audioUrl 112 | } 113 | 114 | } 115 | 116 | extension AudioUnitRecordingViewController: AVAudioRecorderDelegate { 117 | } 118 | 119 | extension AudioUnitRecordingViewController { 120 | func startRecroding() throws { 121 | let fileUrl = getAudioFileUrl() 122 | audioWriter.createAudioFile(url: fileUrl, ofType: kAudioFileWAVEType, audioDesc: auidoUnitRecorder.audioFormat) 123 | auidoUnitRecorder.start(audioWriter) 124 | } 125 | 126 | func endRecording() { 127 | auidoUnitRecorder.stop() 128 | audioWriter.closeAudioFile() 129 | } 130 | } 131 | 132 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitRecording/AudioWriter.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioWriter.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/07. 6 | // 7 | 8 | import AVFoundation 9 | import AudioToolbox 10 | 11 | class AudioWriter { 12 | var audioFile: ExtAudioFileRef? 13 | 14 | func createAudioFile(url: URL, ofType type: AudioFileTypeID, audioDesc : AudioStreamBasicDescription) { 15 | var outputDesc = AudioStreamBasicDescription() 16 | 17 | if type == kAudioFileM4AType { 18 | outputDesc.mFormatID = kAudioFormatMPEG4AAC 19 | outputDesc.mFormatFlags = AudioFormatFlags(MPEG4ObjectID.AAC_LC.rawValue) 20 | outputDesc.mChannelsPerFrame = audioDesc.mChannelsPerFrame 21 | outputDesc.mSampleRate = audioDesc.mSampleRate 22 | outputDesc.mFramesPerPacket = 1024 23 | outputDesc.mBytesPerFrame = 0 24 | outputDesc.mBytesPerPacket = 0 25 | outputDesc.mBitsPerChannel = 0 26 | outputDesc.mReserved = 0 27 | } else if type == kAudioFileCAFType || type == kAudioFileWAVEType { 28 | outputDesc.mFormatID = kAudioFormatLinearPCM 29 | outputDesc.mFormatFlags = kAudioFormatFlagIsPacked | kAudioFormatFlagIsSignedInteger 30 | outputDesc.mChannelsPerFrame = 1 31 | outputDesc.mSampleRate = audioDesc.mSampleRate 32 | outputDesc.mFramesPerPacket = 1 33 | outputDesc.mBytesPerFrame = 2 34 | outputDesc.mBytesPerPacket = 2 35 | outputDesc.mBitsPerChannel = 16 36 | outputDesc.mReserved = 0 37 | } 38 | let result = ExtAudioFileCreateWithURL(url as CFURL, type, &outputDesc, nil, AudioFileFlags.eraseFile.rawValue, &self.audioFile) 39 | if result != noErr || self.audioFile == nil { 40 | fatalError("Cannot create audio file.") 41 | } 42 | } 43 | 44 | func writeToAudioFile(_ buffers: UnsafePointer, _ numFrames: UInt32) { 45 | guard let audioFile = self.audioFile else { 46 | return 47 | } 48 | let result = ExtAudioFileWrite(audioFile, numFrames, buffers) 49 | if result != noErr { 50 | fatalError("Error write file.\(result)") 51 | } 52 | } 53 | 54 | func closeAudioFile() { 55 | if let audioFile = self.audioFile { 56 | if ExtAudioFileDispose(audioFile) != noErr { 57 | fatalError("Cannot close file.") 58 | } 59 | } 60 | } 61 | } 62 | 63 | func RecordingCallback( inRefCon: UnsafeMutableRawPointer, 64 | ioActionFlags: UnsafeMutablePointer, 65 | inTimeStamp: UnsafePointer, 66 | inBusNumber: UInt32, 67 | inNumberFrames: UInt32, 68 | ioData: UnsafeMutablePointer?) -> (OSStatus) 69 | { 70 | let refData = unsafeBitCast( inRefCon, to: AudioUnitRecorder.RefConData.self) 71 | let dataSize = UInt32( 1 * inNumberFrames * UInt32( MemoryLayout.size ) ) 72 | let dataMem = malloc( Int( dataSize ) ) 73 | let audioBuffer = AudioBuffer.init( mNumberChannels: 1, mDataByteSize: dataSize, mData: dataMem ) 74 | var audioBufferList = AudioBufferList.init( mNumberBuffers: 1, mBuffers: audioBuffer ) 75 | 76 | // AudioUnitRender呼び出し 77 | AudioUnitRender( refData.audioUnit!, 78 | ioActionFlags, 79 | inTimeStamp, 80 | inBusNumber, 81 | inNumberFrames, 82 | &audioBufferList ) 83 | 84 | 85 | refData.writer?.writeToAudioFile(&audioBufferList, inNumberFrames) 86 | 87 | free(dataMem) 88 | 89 | return noErr 90 | } 91 | 92 | func RenderCallback( inRefCon: UnsafeMutableRawPointer, 93 | ioActionFlags: UnsafeMutablePointer, 94 | inTimeStamp: UnsafePointer, 95 | inBusNumber: UInt32, 96 | inNumberFrames: UInt32, 97 | ioData: UnsafeMutablePointer?) -> (OSStatus) 98 | { 99 | let refData = unsafeBitCast( inRefCon, to: AudioUnitRecorder.RefConData.self) 100 | // LoopSoundsから再生する範囲のAudioBufferを取得 101 | // let end = ( refData.currentLoop?.buffers.count )! % Int( refData.loopDatas.loopCount() ) 102 | // let start = end - Int( inNumberFrames ) >= 0 ? end - Int( inNumberFrames ) : 0 103 | 104 | // let arr = refData.loopDatas.get( beginIndex: start, endIndex: end ) 105 | 106 | // ioDataのバッファにコピー 107 | let buf = UnsafeMutableBufferPointer( (ioData?.pointee.mBuffers)! ) 108 | // for i in 0 ..< arr.count { 109 | // buf[ i ] = arr[ i ] 110 | // } 111 | 112 | return noErr 113 | } 114 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/AudioUnitRecording/AudioUnitRecorder.swift: -------------------------------------------------------------------------------- 1 | // 2 | // AudioUnitRecorder.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/07. 6 | // 7 | 8 | import AVFoundation 9 | import AudioToolbox 10 | 11 | class AudioUnitRecorder { 12 | class RefConData { 13 | var audioUnit: AudioUnit? = nil 14 | var index: Int = 0 15 | var writer: AudioWriter? = nil 16 | } 17 | 18 | var refData: RefConData = RefConData() 19 | var audioFormat = AudioStreamBasicDescription() 20 | 21 | func initializeAudioUnit() { 22 | var acd = AudioComponentDescription() 23 | acd.componentType = kAudioUnitType_Output 24 | acd.componentSubType = kAudioUnitSubType_RemoteIO 25 | acd.componentManufacturer = kAudioUnitManufacturer_Apple 26 | acd.componentFlags = 0 27 | acd.componentFlagsMask = 0 28 | 29 | guard let ac = AudioComponentFindNext(nil, &acd) else { return } 30 | AudioComponentInstanceNew( ac, &( refData.audioUnit ) ) 31 | 32 | initializeCallbacks() 33 | initializeEnableIO() 34 | initializeAudioFormat() 35 | initializeAudioUnitSetting() 36 | 37 | AudioUnitInitialize( refData.audioUnit! ) 38 | } 39 | 40 | func initializeCallbacks() { 41 | var inputCallback = AURenderCallbackStruct( inputProc: RecordingCallback, inputProcRefCon: Unmanaged.passRetained(refData).toOpaque() ) 42 | // var outputCallback = AURenderCallbackStruct( inputProc: RenderCallback, inputProcRefCon: Unmanaged.passRetained(refData).toOpaque() ) 43 | 44 | AudioUnitSetProperty( refData.audioUnit!, 45 | kAudioOutputUnitProperty_SetInputCallback, 46 | kAudioUnitScope_Global, 47 | kInputBus, 48 | &inputCallback, 49 | UInt32(MemoryLayout.size ) ) 50 | 51 | // AudioUnitSetProperty( refData.audioUnit!, 52 | // kAudioUnitProperty_SetRenderCallback, 53 | // kAudioUnitScope_Global, 54 | // kOutputBus, 55 | // &outputCallback, 56 | // UInt32(MemoryLayout.size ) ) 57 | } 58 | 59 | func initializeEnableIO() { 60 | var flag: UInt32 = 1 61 | AudioUnitSetProperty( refData.audioUnit!, 62 | kAudioOutputUnitProperty_EnableIO, 63 | kAudioUnitScope_Input, 64 | kInputBus, 65 | &flag, 66 | UInt32( MemoryLayout.size ) ) 67 | 68 | AudioUnitSetProperty( refData.audioUnit!, 69 | kAudioOutputUnitProperty_EnableIO, 70 | kAudioUnitScope_Output, 71 | kOutputBus, 72 | &flag, 73 | UInt32( MemoryLayout.size ) ) 74 | } 75 | 76 | func initializeAudioFormat() { 77 | 78 | audioFormat.mSampleRate = 44100.00 79 | audioFormat.mFormatID = kAudioFormatLinearPCM 80 | audioFormat.mFormatFlags = kAudioFormatFlagIsSignedInteger | kAudioFormatFlagIsPacked 81 | audioFormat.mFramesPerPacket = 1 82 | audioFormat.mChannelsPerFrame = 1 83 | audioFormat.mBitsPerChannel = 16 84 | audioFormat.mBytesPerPacket = 2 85 | audioFormat.mBytesPerFrame = 2 86 | 87 | AudioUnitSetProperty( refData.audioUnit!, 88 | kAudioUnitProperty_StreamFormat, 89 | kAudioUnitScope_Output, 90 | kInputBus, 91 | &audioFormat, 92 | UInt32( MemoryLayout.size ) ) 93 | 94 | AudioUnitSetProperty( refData.audioUnit!, 95 | kAudioUnitProperty_StreamFormat, 96 | kAudioUnitScope_Input, 97 | kOutputBus, 98 | &audioFormat, 99 | UInt32( MemoryLayout.size )) 100 | } 101 | 102 | func initializeAudioUnitSetting() { 103 | var flag = 0 104 | AudioUnitSetProperty( refData.audioUnit!, 105 | kAudioUnitProperty_ShouldAllocateBuffer, 106 | kAudioUnitScope_Output, 107 | kInputBus, 108 | &flag, 109 | UInt32( MemoryLayout.size ) ) 110 | } 111 | 112 | func start(_ writer: AudioWriter) { 113 | refData.writer = writer 114 | 115 | AudioOutputUnitStart( refData.audioUnit! ) 116 | } 117 | 118 | func stop() { 119 | AudioOutputUnitStop( refData.audioUnit! ) 120 | 121 | } 122 | } 123 | 124 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/Synthesizer/Synthesizer.swift: -------------------------------------------------------------------------------- 1 | // 2 | // Synthesizer.swift 3 | // CoreAudioExamples 4 | // 5 | // Created by TokyoYoshida on 2021/03/20. 6 | // 7 | 8 | import Foundation 9 | import AVFoundation 10 | 11 | class Synthesizer { 12 | private var audioEngine: AVAudioEngine = AVAudioEngine() 13 | private var sampleRate: Float = 44100.0 14 | private var time: Float = 0 15 | private var deltaTime: Float = 0 16 | private var mainMixer: AVAudioMixerNode? 17 | private var outputNode: AVAudioOutputNode? 18 | private var format: AVAudioFormat? 19 | private var audioSource: AudioSource? 20 | 21 | var volume: Float { 22 | set { 23 | audioEngine.mainMixerNode.outputVolume = newValue 24 | } 25 | get { 26 | return audioEngine.mainMixerNode.outputVolume 27 | } 28 | } 29 | 30 | var tone: Float? { 31 | set { 32 | if let newValue = newValue { 33 | audioSource?.tone = newValue 34 | } 35 | } 36 | get { 37 | audioSource?.tone 38 | } 39 | } 40 | 41 | lazy var sourceNode = AVAudioSourceNode { [self] (_, _, frameCount, audioBufferList) -> OSStatus in 42 | let abl = UnsafeMutableAudioBufferListPointer(audioBufferList) 43 | guard let oscillator = self.audioSource else {fatalError("Oscillator is nil")} 44 | for frame in 0.. = UnsafeMutableBufferPointer(buffer) 49 | buf[frame] = sampleVal 50 | } 51 | } 52 | return noErr 53 | } 54 | 55 | class RefConData { 56 | var frame: Float = 0 57 | } 58 | var refData: RefConData = RefConData() 59 | 60 | 61 | func prepare() { 62 | func initAudioEngene() { 63 | mainMixer = audioEngine.mainMixerNode 64 | outputNode = audioEngine.outputNode 65 | format = outputNode!.inputFormat(forBus: 0) 66 | 67 | 68 | sampleRate = Float(format!.sampleRate) 69 | deltaTime = 1 / Float(sampleRate) 70 | 71 | } 72 | initAudioEngene() 73 | } 74 | 75 | func start() { 76 | refData.frame = 0 77 | let inputFormat = AVAudioFormat(commonFormat: format!.commonFormat, sampleRate: Double(sampleRate), channels: 1, interleaved: format!.isInterleaved) 78 | audioEngine.attach(sourceNode) 79 | audioEngine.connect(sourceNode, to: mainMixer!, format: inputFormat!) 80 | audioEngine.connect(mainMixer!, to: outputNode!, format: nil) 81 | mainMixer?.outputVolume = 0 82 | 83 | do { 84 | try audioEngine.start() 85 | } catch { 86 | fatalError("Coud not start engine: \(error.localizedDescription)") 87 | } 88 | } 89 | 90 | func setAudioSource(audioSource: AudioSource) { 91 | self.audioSource = audioSource 92 | } 93 | 94 | func stop() { 95 | audioEngine.stop() 96 | } 97 | 98 | func dispose() { 99 | stop() 100 | } 101 | } 102 | 103 | protocol AudioSource { 104 | var tone: Float {get set} 105 | func signal(time: Float) -> Float 106 | } 107 | 108 | protocol Oscillator: AudioSource {} 109 | 110 | class ToneAdjuster: Oscillator { 111 | var currentTone: Float = 440.0 112 | var targetTone: Float = 440.0 113 | var tone: Float { 114 | set { 115 | targetTone = newValue 116 | } 117 | get { 118 | currentTone 119 | } 120 | } 121 | 122 | func signal(time: Float) -> Float { 123 | return 0 124 | } 125 | 126 | func updateTone() { 127 | currentTone += (targetTone - currentTone) / 1000000 128 | } 129 | } 130 | 131 | class SinOscillator: ToneAdjuster { 132 | override func signal(time: Float) -> Float { 133 | updateTone() 134 | return sin(currentTone * 2.0 * Float(Double.pi) * time) 135 | } 136 | 137 | } 138 | 139 | class TriangleOscillator: ToneAdjuster { 140 | override func signal(time: Float) -> Float { 141 | updateTone() 142 | 143 | let amplitude: Float = 1 144 | let periood = 1.0 / Double(currentTone) 145 | let currentTime = fmod(Double(time), periood) 146 | let value = currentTime / periood 147 | 148 | var result = 0.0 149 | 150 | switch value { 151 | case 0..<0.25: 152 | result = value * 4 153 | case 0.25..<0.75: 154 | result = 2.0 - (value * 4.0) 155 | default: 156 | result = value * 4 - 4.0 157 | } 158 | return amplitude * Float(result) 159 | } 160 | } 161 | 162 | class RingBuffer { 163 | let max: Int 164 | var data: [T?] 165 | var head: Int = 0 166 | var num: Int = 0 167 | 168 | init(_ max: Int) { 169 | self.max = max 170 | self.data = Array(repeating: nil, count: max) 171 | } 172 | 173 | func enqueue(_ data: T) -> Bool { 174 | guard num < max else { return false } 175 | 176 | self.data[(head + num) % max] = data 177 | num += 1 178 | return true 179 | } 180 | 181 | func dequeue() -> T? { 182 | guard num > 0 else { return nil } 183 | 184 | let ret = self.data[head] 185 | data[head] = nil 186 | num -= 1 187 | head = (head + 1) % max 188 | 189 | return ret 190 | } 191 | } 192 | 193 | protocol Effector { 194 | func signal(waveValue: Float, time: Float) -> Float 195 | } 196 | 197 | class DelayEffector: Effector { 198 | var delayCount = 22_100 199 | lazy var buffer = RingBuffer(delayCount + 1) 200 | var index: Int = 0 201 | 202 | func signal(waveValue: Float, time: Float) -> Float { 203 | func enqueue(_ value: Float) { 204 | if !buffer.enqueue(value) { 205 | fatalError("Cannot enqueue buffer.") 206 | } 207 | } 208 | if delayCount > 0 { 209 | delayCount -= 1 210 | enqueue(waveValue) 211 | return waveValue 212 | } 213 | if let delayValue = buffer.dequeue() { 214 | let ret = waveValue + delayValue*0.4 215 | enqueue(ret) 216 | return ret 217 | } 218 | fatalError("Cannot dequeue buffer.") 219 | } 220 | } 221 | 222 | class PhaserEffector: Effector { 223 | var delayCount = 2_100 224 | lazy var buffer = RingBuffer(delayCount + 1) 225 | var index: Int = 0 226 | 227 | func signal(waveValue: Float, time: Float) -> Float { 228 | func enqueue(_ value: Float) { 229 | if !buffer.enqueue(value) { 230 | fatalError("Cannot enqueue buffer.") 231 | } 232 | } 233 | enqueue(waveValue) 234 | if delayCount > 0 { 235 | delayCount -= 1 236 | return waveValue 237 | } 238 | if let delayValue = buffer.dequeue() { 239 | let ret = waveValue + delayValue 240 | return ret 241 | } 242 | fatalError("Cannot dequeue buffer.") 243 | } 244 | } 245 | 246 | class FlangerEffector: Effector { 247 | var delayCount = 210 248 | lazy var buffer = RingBuffer(delayCount + 1) 249 | var index: Int = 0 250 | var tone: Float = 200.0 251 | 252 | func signal(waveValue: Float, time: Float) -> Float { 253 | func enqueue(_ value: Float) { 254 | if !buffer.enqueue(value) { 255 | fatalError("Cannot enqueue buffer.") 256 | } 257 | } 258 | func lfo(_ waveValue: Float, time: Float) -> Float{ 259 | return waveValue * sin(tone * 2.0 * Float(Double.pi) * time) 260 | } 261 | enqueue(waveValue) 262 | if delayCount > 0 { 263 | delayCount -= 1 264 | return waveValue 265 | } 266 | if let delayValue = buffer.dequeue() { 267 | let ret = waveValue + lfo(delayValue, time: time) 268 | return ret 269 | } 270 | fatalError("Cannot dequeue buffer.") 271 | } 272 | } 273 | 274 | class DistortionEffector: Effector { 275 | var delayCount = 210 276 | lazy var buffer = RingBuffer(delayCount + 1) 277 | var index: Int = 0 278 | var tone: Float = 200.0 279 | var amplificationLevel: Float = 1.5 280 | var threshold: Float = 0.9 281 | 282 | func signal(waveValue: Float, time: Float) -> Float { 283 | let result = waveValue * amplificationLevel 284 | if result > threshold { 285 | return threshold 286 | } 287 | if result < -threshold { 288 | return -threshold 289 | } 290 | return result 291 | } 292 | } 293 | protocol Mixer: AudioSource { 294 | func addEffector(index: Int, effector: Effector) 295 | func removeEffector(at index: Int) 296 | } 297 | 298 | class AudioMixer: Mixer { 299 | let semaphore = DispatchSemaphore(value: 1) 300 | private var oscillator: Oscillator 301 | private var effectors: [Int:Effector] = [:] 302 | var tone: Float { 303 | set { 304 | oscillator.tone = newValue 305 | } 306 | get { 307 | oscillator.tone 308 | } 309 | } 310 | init(_ oscillator: Oscillator) { 311 | self.oscillator = oscillator 312 | } 313 | 314 | func signal(time: Float) -> Float { 315 | semaphore.wait() 316 | 317 | var waveValue = oscillator.signal(time: time) 318 | for (_,effector) in effectors { 319 | waveValue = effector.signal(waveValue: waveValue, time: time) 320 | } 321 | 322 | semaphore.signal() 323 | 324 | return waveValue 325 | } 326 | 327 | func addEffector(index: Int, effector: Effector) { 328 | semaphore.wait() 329 | 330 | effectors[index] = effector 331 | 332 | semaphore.signal() 333 | } 334 | 335 | func removeEffector(at index: Int) { 336 | semaphore.wait() 337 | 338 | effectors[index] = nil 339 | 340 | semaphore.signal() 341 | } 342 | 343 | func setOscillator(oscillator: Oscillator) { 344 | semaphore.wait() 345 | 346 | self.oscillator = oscillator 347 | 348 | semaphore.signal() 349 | } 350 | } 351 | -------------------------------------------------------------------------------- /CoreAudioExamples/Main.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 | 56 | 57 | 58 | 59 | 60 | 61 | 62 | 63 | 64 | 65 | 66 | 67 | 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | 78 | 79 | 80 | 81 | 82 | 83 | 84 | 85 | 86 | 87 | 88 | 89 | 90 | 91 | 92 | 93 | 94 | 95 | 96 | 97 | 98 | 99 | 100 | 101 | 102 | 103 | 104 | 105 | 106 | 107 | 108 | 109 | 110 | 111 | 112 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | 120 | 121 | 122 | 123 | 124 | -------------------------------------------------------------------------------- /CoreAudioExamples/Samples/Synthesizer/Synthesizer.storyboard: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49 | 50 | 51 | 52 | 53 | 54 | 55 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