Remove FeatureUtil for Swift 6.0.

Examples/iOS/Screencast/SampleHandler.swift

@@ -24,8 +24,9 @@ open class SampleHandler: RPBroadcastSampleHandler {
     }()
 
     private lazy var rtmpStream: RTMPStream = {
-        FeatureUtil.setEnabled(for: .multiTrackAudioMixing, isEnabled: true)
-        return RTMPStream(connection: rtmpConnection)
+        let stream = RTMPStream(connection: rtmpConnection)
+        stream.isMultiTrackAudioMixingEnabled = true
+        return stream
     }()
 
     private var needVideoConfiguration = true

Examples/macOS/AppDelegate.swift

@@ -10,6 +10,5 @@ class AppDelegate: NSObject, NSApplicationDelegate {
 
     func applicationDidFinishLaunching(_ aNotification: Notification) {
         LBLogger.with(HaishinKitIdentifier).level = .info
-        FeatureUtil.setEnabled(for: .multiTrackAudioMixing, isEnabled: true)
     }
 }

Examples/macOS/CameraIngestViewController.swift

@@ -34,6 +34,8 @@ final class CameraIngestViewController: NSViewController {
 
     override func viewDidAppear() {
         super.viewDidAppear()
+
+        stream.isMultiTrackAudioMixingEnabled = true
 
         stream.videoMixerSettings.mode = .offscreen
         stream.screen.startRunning()
@@ -80,7 +82,7 @@ final class CameraIngestViewController: NSViewController {
 
         var audios = AVCaptureDevice.devices(for: .audio)
         audios.removeFirst()
-        if let device = audios.first, FeatureUtil.isEnabled(for: .multiTrackAudioMixing) {
+        if let device = audios.first, stream.isMultiTrackAudioMixingEnabled {
             stream.attachAudio(device, track: 1)
         }
 

HaishinKit.xcodeproj/project.pbxproj

@@ -181,7 +181,6 @@
 		BC4078C42AD5CC7E00BBB4FA /* IOMuxer.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4078C32AD5CC7E00BBB4FA /* IOMuxer.swift */; };
 		BC4231642BCA5F28003A80DC /* IOAudioMixerByMultiTrack.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4231632BCA5F28003A80DC /* IOAudioMixerByMultiTrack.swift */; };
 		BC42316A2BCA8BE5003A80DC /* IOAudioMixerBySingleTrack.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4231692BCA8BE5003A80DC /* IOAudioMixerBySingleTrack.swift */; };
-		BC42316C2BCB7084003A80DC /* FeatureUtil.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC42316B2BCB7084003A80DC /* FeatureUtil.swift */; };
 		BC4914A228DDD33D009E2DF6 /* VTSessionConvertible.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4914A128DDD33D009E2DF6 /* VTSessionConvertible.swift */; };
 		BC4914A628DDD367009E2DF6 /* VTSessionOption.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4914A528DDD367009E2DF6 /* VTSessionOption.swift */; };
 		BC4914AE28DDF445009E2DF6 /* VTDecompressionSession+Extension.swift in Sources */ = {isa = PBXBuildFile; fileRef = BC4914AD28DDF445009E2DF6 /* VTDecompressionSession+Extension.swift */; };
@@ -661,7 +660,6 @@
 		BC4078C32AD5CC7E00BBB4FA /* IOMuxer.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IOMuxer.swift; sourceTree = "<group>"; };
 		BC4231632BCA5F28003A80DC /* IOAudioMixerByMultiTrack.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IOAudioMixerByMultiTrack.swift; sourceTree = "<group>"; };
 		BC4231692BCA8BE5003A80DC /* IOAudioMixerBySingleTrack.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = IOAudioMixerBySingleTrack.swift; sourceTree = "<group>"; };
-		BC42316B2BCB7084003A80DC /* FeatureUtil.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = FeatureUtil.swift; sourceTree = "<group>"; };
 		BC4914A128DDD33D009E2DF6 /* VTSessionConvertible.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VTSessionConvertible.swift; sourceTree = "<group>"; };
 		BC4914A528DDD367009E2DF6 /* VTSessionOption.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = VTSessionOption.swift; sourceTree = "<group>"; };
 		BC4914AD28DDF445009E2DF6 /* VTDecompressionSession+Extension.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = "VTDecompressionSession+Extension.swift"; sourceTree = "<group>"; };
@@ -877,7 +875,6 @@
 				BC0D236C26331BAB001DDA0C /* DataBuffer.swift */,
 				29B876671CD70AB300FC07DA /* DataConvertible.swift */,
 				2976A4851D4903C300B53EF2 /* DeviceUtil.swift */,
-				BC42316B2BCB7084003A80DC /* FeatureUtil.swift */,
 				BC32E88729C9971100051507 /* InstanceHolder.swift */,
 				2942424C1CF4C01300D65DCB /* MD5.swift */,
 				2942A4F721A9418A004E1BEE /* Running.swift */,
@@ -1920,7 +1917,6 @@
 				BC0F1FDC2ACC630400C326FF /* NSView+Extension.swift in Sources */,
 				BC16019C2BE0E4750061BD3E /* ScreenObject.swift in Sources */,
 				29EA87E21E79A1E90043A5F8 /* CMVideoFormatDescription+Extension.swift in Sources */,
-				BC42316C2BCB7084003A80DC /* FeatureUtil.swift in Sources */,
 				BC110253292DD6E900D48035 /* vImage_Buffer+Extension.swift in Sources */,
 				BC1DC4A429F4F74F00E928ED /* AVCaptureSession+Extension.swift in Sources */,
 				29EA87D81E79A0090043A5F8 /* URL+Extension.swift in Sources */,

README.md

@@ -308,9 +308,9 @@ stream.attachAudio(front, track: 0) { audioUnit, error in
 ```
 
 #### [AudioMixerSettings](https://shogo4405.github.io/HaishinKit.swift/Structs/IOAudioMixerSettings.html)
-If you want to mix multiple audio tracks, please enable the Feature flag.
+If you want to mix multiple audio tracks, please enable the feature flag.
 ```swift
-FeatureUtil.setEnabled(for: .multiTrackAudioMixing, isEnabled: true)
+stream.isMultiTrackAudioMixingEnabled = true
 ```
 
 When you specify the sampling rate, it will perform resampling. Additionally, in the case of multiple channels, downsampling can be applied.

Sources/IO/IOAudioUnit.swift

@@ -25,15 +25,6 @@ protocol IOAudioUnitDelegate: AnyObject {
 final class IOAudioUnit: IOUnit {
     let lockQueue = DispatchQueue(label: "com.haishinkit.HaishinKit.IOAudioUnit.lock")
     weak var mixer: IOMixer?
-    var isMonitoringEnabled = false {
-        didSet {
-            if isMonitoringEnabled {
-                monitor.startRunning()
-            } else {
-                monitor.stopRunning()
-            }
-        }
-    }
     var settings: AudioCodecSettings {
         get {
             codec.settings
@@ -50,6 +41,16 @@ final class IOAudioUnit: IOUnit {
             audioMixer.settings = newValue
         }
     }
+    var isMonitoringEnabled = false {
+        didSet {
+            if isMonitoringEnabled {
+                monitor.startRunning()
+            } else {
+                monitor.stopRunning()
+            }
+        }
+    }
+    var isMultiTrackAudioMixingEnabled = false
     var isRunning: Atomic<Bool> {
         return codec.isRunning
     }
@@ -65,7 +66,7 @@ final class IOAudioUnit: IOUnit {
         return codec
     }()
     private lazy var audioMixer: any IOAudioMixerConvertible = {
-        if FeatureUtil.isEnabled(for: .multiTrackAudioMixing) {
+        if isMultiTrackAudioMixingEnabled {
             var audioMixer = IOAudioMixerByMultiTrack()
             audioMixer.delegate = self
             return audioMixer

Sources/IO/IOStream.swift

@@ -145,6 +145,17 @@ open class IOStream: NSObject {
     }
     #endif
 
+    /// Specifies the feature to mix multiple audio tracks. For example, it is possible to mix .appAudio and .micAudio from ReplayKit.
+    /// Warning: If there is a possibility of this feature, please set it to true initially.
+    public var isMultiTrackAudioMixingEnabled: Bool {
+        get {
+            return mixer.audioIO.isMultiTrackAudioMixingEnabled
+        }
+        set {
+            mixer.audioIO.isMultiTrackAudioMixingEnabled = newValue
+        }
+    }
+
     /// Specifies the sessionPreset for the AVCaptureSession.
     @available(tvOS 17.0, *)
     public var sessionPreset: AVCaptureSession.Preset {

Sources/IO/PiPHKView.swift

@@ -204,10 +204,6 @@ public class PiPHKView: NSView {
         super.init(coder: aDecoder)
     }
 
-    deinit {
-        attachStream(nil)
-    }
-
     /// Prepares the receiver for service after it has been loaded from an Interface Builder archive, or nib file.
     override public func awakeFromNib() {
         super.awakeFromNib()