/**
 * @holoscript/core Asset Streamer Interface
 *
 * Defines the @builtin runtime interface for predictive asset streaming.
 * Runtimes implement this to manage low-priority background loading and decompression.
 */
/**
 * Asset streaming priority
 */
export declare enum StreamPriority {
    IMMEDIATE = 0,
    PREDICTIVE_HIGH = 1,
    PREDICTIVE_LOW = 2,
    BACKGROUND = 3
}
/**
 * Asset metadata for streaming
 */
export interface AssetStreamRequest {
    id: string;
    url: string;
    type: 'mesh' | 'texture' | 'audio' | 'script';
    priority: StreamPriority;
    size?: number;
    compression?: 'draco' | 'meshopt' | 'none';
}
/**
 * Streaming status
 */
export interface StreamStatus {
    id: string;
    progress: number;
    state: 'queued' | 'loading' | 'decompressing' | 'ready' | 'error';
    error?: string;
}
/**
 * AssetStreamer @builtin Interface
 */
export interface AssetStreamer {
    /** Initialize the streamer with config */
    initialize(config: {
        workerPoolSize?: number;
        memoryLimitMB?: number;
    }): Promise<void>;
    /**
     * Request an asset to be streamed.
     * If priority is PREDICTIVE, it will be loaded in the background.
     */
    requestAsset(request: AssetStreamRequest): void;
    /** Cancel a pending stream request */
    cancelRequest(id: string): void;
    /** Get the status of a specific asset stream */
    getStatus(id: string): StreamStatus | undefined;
    /** Purge old or distant assets from memory */
    purgeAssets(distanceThreshold: number, currentPlayerPos: [number, number, number]): void;
    /** Dispose resources */
    dispose(): void;
}
/**
 * Global registry for builtin AssetStreamers
 */
export declare const assetStreamerRegistry: Map<string, AssetStreamer>;
/**
 * Register an asset streamer implementation
 */
export declare function registerAssetStreamer(name: string, streamer: AssetStreamer): void;
/**
 * Get a registered asset streamer
 */
export declare function getAssetStreamer(name: string): AssetStreamer | undefined;
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