From 1e95f8948750dbf7b0b1bcd952749e2f01d6ab2b Mon Sep 17 00:00:00 2001
From: shogo4405 <shogo4405@gmail.com>
Date: Sat, 2 Nov 2024 01:51:49 +0900
Subject: [PATCH] Change in the option specification method for MediaMixer.

---
 Examples/iOS/IngestViewController.swift     |  1 -
 Examples/iOS/Screencast/SampleHandler.swift |  3 +-
 Sources/Mixer/MediaMixer.swift              | 45 ++++++++++++++-------
 3 files changed, 31 insertions(+), 18 deletions(-)

diff --git a/Examples/iOS/IngestViewController.swift b/Examples/iOS/IngestViewController.swift
index 00d005c05..a3abf058a 100644
--- a/Examples/iOS/IngestViewController.swift
+++ b/Examples/iOS/IngestViewController.swift
@@ -36,7 +36,6 @@ final class IngestViewController: UIViewController {
     override func viewDidLoad() {
         super.viewDidLoad()
         Task {
-            await mixer.setMultiCamSessionEnabled(true)
             // If you want to use the multi-camera feature, please make sure stream.isMultiCamSessionEnabled = true. Before attachCamera or attachAudio.
             // mixer.isMultiCamSessionEnabled = true
             if let orientation = DeviceUtil.videoOrientation(by: UIApplication.shared.statusBarOrientation) {
diff --git a/Examples/iOS/Screencast/SampleHandler.swift b/Examples/iOS/Screencast/SampleHandler.swift
index 50191fc59..5e824622d 100644
--- a/Examples/iOS/Screencast/SampleHandler.swift
+++ b/Examples/iOS/Screencast/SampleHandler.swift
@@ -30,7 +30,7 @@ final class SampleHandler: RPBroadcastSampleHandler, @unchecked Sendable {
             }
         }
     }
-    private var mixer = MediaMixer()
+    private var mixer = MediaMixer(multiCamSessionEnabled: false, multiTrackAudioMixingEnabled: true)
     private let netStreamSwitcher = HKStreamSwitcher()
     private var needVideoConfiguration = true
 
@@ -49,7 +49,6 @@ final class SampleHandler: RPBroadcastSampleHandler, @unchecked Sendable {
         // mixer.audioMixerSettings.tracks[1] = .default
         isVideoRotationEnabled = false
         Task {
-            await mixer.setMultiTrackAudioMixingEnabled(true)
             await netStreamSwitcher.setPreference(Preference.default)
             // ReplayKit is sensitive to memory, so we limit the queue to a maximum of five items.
             if let stream = await netStreamSwitcher.stream {
diff --git a/Sources/Mixer/MediaMixer.swift b/Sources/Mixer/MediaMixer.swift
index 0da0ea2a7..f6d00cf95 100644
--- a/Sources/Mixer/MediaMixer.swift
+++ b/Sources/Mixer/MediaMixer.swift
@@ -99,12 +99,31 @@ public final actor MediaMixer {
     @ScreenActor
     private lazy var displayLink = DisplayLinkChoreographer()
 
+    #if os(iOS) || os(tvOS)
+    /// Creates a new instance.
+    ///
+    /// - Parameters:
+    ///   - multiCamSessionEnabled: Specifies the AVCaptureMultiCamSession enabled.
+    ///   - multiTrackAudioMixingEnabled: Specifies the feature to mix multiple audio tracks. For example, it is possible to mix .appAudio and .micAudio from ReplayKit.
+    public init(multiCamSessionEnabled: Bool = true, multiTrackAudioMixingEnabled: Bool = false) {
+        Task {
+            await setMultiCamSessionEnabled(multiCamSessionEnabled)
+            await setMultiTrackAudioMixingEnabled(multiTrackAudioMixingEnabled)
+            await startRunning()
+        }
+    }
+    #else
     /// Creates a new instance.
-    public init() {
+    ///
+    /// - Parameters:
+    ///   - multiTrackAudioMixingEnabled: Specifies the feature to mix multiple audio tracks. For example, it is possible to mix .appAudio and .micAudio from ReplayKit.
+    public init(multiTrackAudioMixingEnabled: Bool = false) {
         Task {
+            await setMultiTrackAudioMixingEnabled(multiTrackAudioMixingEnabled)
             await startRunning()
         }
     }
+    #endif
 
     /// Attaches a video device.
     @available(tvOS 17.0, *)
@@ -246,20 +265,6 @@ public final actor MediaMixer {
         session.stopRunning()
     }
 
-    #if os(iOS) || os(tvOS)
-    /// Specifies the AVCaptureMultiCamSession enabled.
-    /// - Attention: If there is a possibility of using multiple cameras, please set it to true initially.
-    public func setMultiCamSessionEnabled(_ multiCamSessionEnabled: Bool) {
-        session.isMultiCamSessionEnabled = multiCamSessionEnabled
-    }
-    #endif
-
-    /// Specifies the feature to mix multiple audio tracks. For example, it is possible to mix .appAudio and .micAudio from ReplayKit.
-    /// - Attention: If there is a possibility of this feature, please set it to true initially.
-    public func setMultiTrackAudioMixingEnabled(_ multiTrackAudioMixingEnabled: Bool) {
-        audioIO.isMultiTrackAudioMixingEnabled = multiTrackAudioMixingEnabled
-    }
-
     /// Appends an AVAudioBuffer.
     /// - Parameters:
     ///   - audioBuffer:The audio buffer to append.
@@ -296,6 +301,16 @@ public final actor MediaMixer {
         }
     }
 
+    #if os(iOS) || os(tvOS)
+    func setMultiCamSessionEnabled(_ multiCamSessionEnabled: Bool) {
+        session.isMultiCamSessionEnabled = multiCamSessionEnabled
+    }
+    #endif
+
+    func setMultiTrackAudioMixingEnabled(_ multiTrackAudioMixingEnabled: Bool) {
+        audioIO.isMultiTrackAudioMixingEnabled = multiTrackAudioMixingEnabled
+    }
+
     func setVideoRenderingMode(_ mode: VideoMixerSettings.Mode) {
         switch mode {
         case .passthrough: