clean up config object types

Author: David Motsonashvili

firebase-ai/src/main/kotlin/com/google/firebase/ai/type/AudioTranscriptionConfig.kt

@@ -16,20 +16,12 @@
 
 package com.google.firebase.ai.type
 
-import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.Serializable
 
-/**
- * The audio transcription configuration.
- * @property enable If true, the server will use Gemini to transcribe the audio.
- * @property prefixPrompt Prefix prompt for the audio transcription op. This is useful to override
- * the default prefix prompt that only asks the model to transcribe the audio. Overriding can be
- * useful to provide additional context to the model such as what language is expected to be spoken
- * in the audio.
- */
-public class AudioTranscriptionConfig(
-  internal val enable: Boolean? = null,
-  internal val prefixPrompt: String? = null
-) {
+/** The audio transcription configuration. Its presence enables audio transcription */
+public class AudioTranscriptionConfig() {
+
+  @Serializable internal object Internal
 
-  internal fun toInternal() = JsonObject(emptyMap())
+  internal fun toInternal() = Internal
 }

firebase-ai/src/main/kotlin/com/google/firebase/ai/type/LiveClientSetupMessage.kt

@@ -18,7 +18,6 @@ package com.google.firebase.ai.type
 
 import kotlinx.serialization.ExperimentalSerializationApi
 import kotlinx.serialization.Serializable
-import kotlinx.serialization.json.JsonObject
 
 /**
  * First message in a live session.
@@ -34,8 +33,8 @@ internal class LiveClientSetupMessage(
   val generationConfig: LiveGenerationConfig.Internal?,
   val tools: List<Tool.Internal>?,
   val systemInstruction: Content.Internal?,
-  val inputAudioTranscription: JsonObject?,
-  val outputAudioTranscription: JsonObject?,
+  val inputAudioTranscription: AudioTranscriptionConfig.Internal?,
+  val outputAudioTranscription: AudioTranscriptionConfig.Internal?,
 ) {
   @Serializable
   internal class Internal(val setup: LiveClientSetup) {
@@ -45,8 +44,8 @@ internal class LiveClientSetupMessage(
       val generationConfig: LiveGenerationConfig.Internal?,
       val tools: List<Tool.Internal>?,
       val systemInstruction: Content.Internal?,
-      val inputAudioTranscription: JsonObject?,
-      val outputAudioTranscription: JsonObject?,
+      val inputAudioTranscription: AudioTranscriptionConfig.Internal?,
+      val outputAudioTranscription: AudioTranscriptionConfig.Internal?,
     )
   }