import { Logger } from './logger';
/**
 * Represents transcription data received from the LiveKit room
 */
export interface TranscriptionData {
    /** Type of message (ai or human) */
    message_type: 'ai' | 'human';
    /** Content of the message */
    content: string;
}
/**
 * Configuration for the transcription manager
 */
export interface TranscriptionManagerConfig {
    /** Logger instance */
    logger?: Logger;
    /** Whether to enable debug mode */
    isDebug?: boolean;
    /** Callback for transcription updates */
    onTranscriptionUpdate?: (data: TranscriptionData) => void;
}
/**
 * Manages transcription data parsing, validation, and callbacks
 */
export declare class TranscriptionManager {
    private logger;
    private isDebug;
    private onTranscriptionUpdate;
    /**
     * Creates a new transcription manager
     * @param config Configuration options
     */
    constructor(config?: TranscriptionManagerConfig);
    /**
     * Sets the callback for transcription updates
     * @param callback The callback function
     */
    setTranscriptionCallback(callback: (data: TranscriptionData) => void): void;
    /**
     * Handles binary data received from the LiveKit room
     * @param payload The binary data payload
     * @throws AvatarStreamError if data handling fails
     */
    handleDataReceived(payload: Uint8Array): void;
    /**
     * Parses transcription data from a JSON string
     * @param jsonString The JSON string to parse
     * @returns The parsed data, or null if parsing failed
     * @private
     */
    private parseTranscriptionData;
    /**
     * Validates that data is a valid TranscriptionData object
     * @param data The data to validate
     * @returns Type guard for TranscriptionData
     * @private
     */
    private isValidTranscriptionData;
}