Expose RTCAudioProcessingModule and AudioTrack.add(audioRenderer:)

Package.swift

@@ -17,7 +17,7 @@ let package = Package(
         )
     ],
     dependencies: [
-        .package(name: "WebRTC", url: "https://github.com/webrtc-sdk/Specs.git", .exact("114.5735.02")),
+        .package(name: "WebRTC", url: "https://github.com/webrtc-sdk/Specs.git", .exact("114.5735.04")),
         .package(name: "SwiftProtobuf", url: "https://github.com/apple/swift-protobuf.git", .upToNextMajor(from: "1.21.0")),
         .package(name: "Promises", url: "https://github.com/google/promises.git", .upToNextMajor(from: "2.2.0")),
         .package(url: "https://github.com/apple/swift-log.git", .upToNextMajor(from: "1.5.2"))

Sources/LiveKit/Core/Engine+WebRTC.swift

@@ -79,6 +79,10 @@ internal extension Engine {
 
     static private let decoderFactory = VideoDecoderFactory()
 
+    static let audioProcessingModule: RTCDefaultAudioProcessingModule = {
+        RTCDefaultAudioProcessingModule()
+    }()
+
     static let peerConnectionFactory: RTCPeerConnectionFactory = {
 
         logger.log("Initializing SSL...", type: Engine.self)
@@ -94,7 +98,8 @@ internal extension Engine {
 
         return RTCPeerConnectionFactory(bypassVoiceProcessing: bypassVoiceProcessing,
                                         encoderFactory: encoderFactory,
-                                        decoderFactory: decoderFactory)
+                                        decoderFactory: decoderFactory,
+                                        audioProcessingModule: audioProcessingModule)
     }()
 
     // forbid direct access

Sources/LiveKit/Core/Room.swift

@@ -442,3 +442,13 @@ extension Room {
         set { Engine.bypassVoiceProcessing = newValue }
     }
 }
+
+// MARK: - Audio Processing
+
+extension Room {
+
+    @objc
+    public static var audioProcessingModule: RTCDefaultAudioProcessingModule {
+        Engine.audioProcessingModule
+    }
+}

Sources/LiveKit/Core/Transport.swift

@@ -297,7 +297,7 @@ extension Transport: RTCPeerConnectionDelegate {
             return
         }
 
-        log("didAdd track \(track.trackId)")
+        log("didAddTrack type: \(type(of: track)), id: \(track.trackId)")
         notify { $0.transport(self, didAddTrack: track, rtpReceiver: rtpReceiver, streams: mediaStreams) }
     }
 

Sources/LiveKit/Track/AudioTrack.swift

@@ -19,9 +19,4 @@ import WebRTC
 
 @objc
 public protocol AudioTrack where Self: Track {
-
-}
-
-extension AudioTrack {
-
 }

Sources/LiveKit/Track/Remote/RemoteAudioTrack.swift

@@ -60,4 +60,14 @@ public class RemoteAudioTrack: Track, RemoteTrack, AudioTrack {
             return didStop
         }
     }
+
+    public func add(audioRenderer: RTCAudioRenderer) {
+        guard let audioTrack = mediaTrack as? RTCAudioTrack else { return  }
+        audioTrack.add(audioRenderer)
+    }
+
+    public func remove(audioRenderer: RTCAudioRenderer) {
+        guard let audioTrack = mediaTrack as? RTCAudioTrack else { return }
+        audioTrack.remove(audioRenderer)
+    }
 }