Fix Realtime API issues and audio engine crash

Sources/OpenAI/Private/Audio/MicrophonePCMSampleVendorAE.swift

@@ -62,7 +62,7 @@ class MicrophonePCMSampleVendorAE: MicrophonePCMSampleVendor {
     logger.debug("MicrophonePCMSampleVendorAE is being freed")
   }
 
-  public func start() throws -> AsyncStream<AVAudioPCMBuffer> {
+  func start() throws -> AsyncStream<AVAudioPCMBuffer> {
     guard
       let desiredTapFormat = AVAudioFormat(
         commonFormat: .pcmFormatInt16,
@@ -87,14 +87,10 @@ class MicrophonePCMSampleVendorAE: MicrophonePCMSampleVendor {
     return AsyncStream<AVAudioPCMBuffer> { [weak self] continuation in
       guard let this = self else { return }
       this.continuation = continuation
-      this.inputNode.installTap(onBus: 0, bufferSize: targetBufferSize, format: desiredTapFormat) { [weak this] sampleBuffer, _ in
-        if let accumulatedBuffer = this?.microphonePCMSampleVendorCommon.resampleAndAccumulate(sampleBuffer) {
-          // If the buffer has accumulated to a sufficient level, give it back to the caller
-          Task { @RealtimeActor in
-            this?.continuation?.yield(accumulatedBuffer)
-          }
-        }
-      }
+      this.installTapNonIsolated(
+        inputNode: this.inputNode,
+        bufferSize: targetBufferSize,
+        format: desiredTapFormat)
     }
   }
 
@@ -111,5 +107,22 @@ class MicrophonePCMSampleVendorAE: MicrophonePCMSampleVendor {
   private let microphonePCMSampleVendorCommon = MicrophonePCMSampleVendorCommon()
   private var continuation: AsyncStream<AVAudioPCMBuffer>.Continuation?
 
+  private nonisolated func installTapNonIsolated(
+    inputNode: AVAudioInputNode,
+    bufferSize: AVAudioFrameCount,
+    format: AVAudioFormat)
+  {
+    inputNode.installTap(onBus: 0, bufferSize: bufferSize, format: format) { [weak self] sampleBuffer, _ in
+      guard let self else { return }
+      Task { await self.processBuffer(sampleBuffer) }
+    }
+  }
+
+  private func processBuffer(_ buffer: AVAudioPCMBuffer) {
+    if let accumulatedBuffer = microphonePCMSampleVendorCommon.resampleAndAccumulate(buffer) {
+      continuation?.yield(accumulatedBuffer)
+    }
+  }
+
 }
 #endif

Sources/OpenAI/Private/Realtime/OpenAIRealtimeSession.swift

@@ -273,6 +273,62 @@ open class OpenAIRealtimeSession {
         logger.warning("Received response.done with unexpected format")
       }
 
+    case "response.text.delta":
+      if let delta = json["delta"] as? String {
+        continuation?.yield(.responseTextDelta(delta))
+      }
+
+    case "response.text.done":
+      if let text = json["text"] as? String {
+        continuation?.yield(.responseTextDone(text))
+      }
+
+    case "response.output_item.added":
+      if
+        let item = json["item"] as? [String: Any],
+        let itemId = item["id"] as? String,
+        let type = item["type"] as? String
+      {
+        continuation?.yield(.responseOutputItemAdded(itemId: itemId, type: type))
+      }
+
+    case "response.output_item.done":
+      if
+        let item = json["item"] as? [String: Any],
+        let itemId = item["id"] as? String,
+        let type = item["type"] as? String
+      {
+        let content = item["content"] as? [[String: Any]]
+        continuation?.yield(.responseOutputItemDone(itemId: itemId, type: type, content: content))
+      }
+
+    case "response.content_part.added":
+      if
+        let part = json["part"] as? [String: Any],
+        let type = part["type"] as? String
+      {
+        continuation?.yield(.responseContentPartAdded(type: type))
+      }
+
+    case "response.content_part.done":
+      if
+        let part = json["part"] as? [String: Any],
+        let type = part["type"] as? String
+      {
+        let text = part["text"] as? String
+        continuation?.yield(.responseContentPartDone(type: type, text: text))
+      }
+
+    case "conversation.item.created":
+      if
+        let item = json["item"] as? [String: Any],
+        let itemId = item["id"] as? String,
+        let type = item["type"] as? String
+      {
+        let role = item["role"] as? String
+        continuation?.yield(.conversationItemCreated(itemId: itemId, type: type, role: role))
+      }
+
     default:
       // Log unhandled message types with more detail for debugging
       logger.warning("⚠️ Unhandled message type: \(messageType)")

Sources/OpenAI/Public/Parameters/Realtime/OpenAIRealtimeSessionConfiguration.swift

@@ -11,7 +11,6 @@
 /// Realtime session configuration
 /// https://platform.openai.com/docs/api-reference/realtime-client-events/session/update#realtime-client-events/session/update-session
 public struct OpenAIRealtimeSessionConfiguration: Encodable, Sendable {
-
   public init(
     inputAudioFormat: OpenAIRealtimeSessionConfiguration.AudioFormat? = nil,
     inputAudioTranscription: OpenAIRealtimeSessionConfiguration.InputAudioTranscription? = nil,
@@ -41,7 +40,6 @@ public struct OpenAIRealtimeSessionConfiguration: Encodable, Sendable {
   }
 
   public enum ToolChoice: Encodable, Sendable {
-
     /// The model will not call any tool and instead generates a message.
     /// This is the default when no tools are present in the request body
     case none
@@ -73,22 +71,14 @@ public struct OpenAIRealtimeSessionConfiguration: Encodable, Sendable {
       case .specific(let functionName):
         var container = encoder.container(keyedBy: RootKey.self)
         try container.encode("function", forKey: .type)
-        var functionContainer = container.nestedContainer(
-          keyedBy: FunctionKey.self,
-          forKey: .function)
-        try functionContainer.encode(functionName, forKey: .name)
+        try container.encode(functionName, forKey: .name)
       }
     }
 
     private enum RootKey: CodingKey {
       case type
-      case function
-    }
-
-    private enum FunctionKey: CodingKey {
       case name
     }
-
   }
 
   /// The format of input audio. Options are `pcm16`, `g711_ulaw`, or `g711_alaw`.
@@ -157,7 +147,6 @@ public struct OpenAIRealtimeSessionConfiguration: Encodable, Sendable {
     case turnDetection = "turn_detection"
     case voice
   }
-
 }
 
 // MARK: OpenAIRealtimeSessionConfiguration.InputAudioTranscription
@@ -238,7 +227,6 @@ extension OpenAIRealtimeSessionConfiguration {
 
 extension OpenAIRealtimeSessionConfiguration {
   public struct TurnDetection: Encodable, Sendable {
-
     public init(
       type: DetectionType)
     {
@@ -270,7 +258,6 @@ extension OpenAIRealtimeSessionConfiguration {
       case type
       case eagerness
     }
-
   }
 }
 
@@ -321,6 +308,5 @@ extension OpenAIRealtimeSessionConfiguration.TurnDetection {
       case medium
       case high
     }
-
   }
 }

Sources/OpenAI/Public/ResponseModels/Realtime/OpenAIRealtimeMessage.swift

@@ -29,4 +29,19 @@ public enum OpenAIRealtimeMessage: Sendable {
 
   /// Response completion with potential errors
   case responseDone(status: String, statusDetails: [String: Any]?) // "response.done"
+
+  // Text streaming (for text-only responses)
+  case responseTextDelta(String) // "response.text.delta"
+  case responseTextDone(String) // "response.text.done"
+
+  // Output item lifecycle
+  case responseOutputItemAdded(itemId: String, type: String) // "response.output_item.added"
+  case responseOutputItemDone(itemId: String, type: String, content: [[String: Any]]?) // "response.output_item.done"
+
+  // Content part lifecycle
+  case responseContentPartAdded(type: String) // "response.content_part.added"
+  case responseContentPartDone(type: String, text: String?) // "response.content_part.done"
+
+  /// Conversation item
+  case conversationItemCreated(itemId: String, type: String, role: String?) // "conversation.item.created"
 }