/**
 * Transform name constants to ensure consistency between worker and manager.
 */
export declare const TRANSFORM_NAMES: {
    readonly REDUNDANT_AUDIO: "AudioRed";
    readonly AUDIO_SENDER: "AudioSender";
    readonly AUDIO_RECEIVER: "AudioReceiver";
    readonly VIDEO_SENDER: "VideoSender";
    readonly VIDEO_RECEIVER: "VideoReceiver";
};
/**
 * Common message types used by all transforms.
 */
export declare const COMMON_MESSAGE_TYPES: {
    readonly LOG: "Log";
    readonly METRICS: "Metrics";
};
/**
 * Messages exchanged between main thread and Web Worker for transform configuration.
 */
export interface EncodedTransformMessage {
    type: string;
    transformName: string;
    message?: Record<string, string>;
}
/**
 * Abstract base class for WebRTC encoded media transforms running in a Web Worker.
 * Provides logging infrastructure and message handling for transform implementations.
 */
export default abstract class EncodedTransform {
    protected shouldLog: boolean;
    protected transformName(): string;
    /**
     * Processes an encoded frame. Implements TransformStream transformer interface.
     */
    abstract transform(frame: RTCEncodedAudioFrame | RTCEncodedVideoFrame, controller: TransformStreamDefaultController<RTCEncodedAudioFrame | RTCEncodedVideoFrame>): void;
    /**
     * Handles configuration messages from the main thread. Override in subclasses.
     */
    handleMessage(_message: EncodedTransformMessage): void;
    protected log(message: string): void;
}