/**
 * postMessage protocol shared between the main thread and decode-worker.
 *
 * Direction is encoded by message kind. Typed arrays are always carried
 * in transferable buffers so we don't double-allocate.
 */
import type { DecodedPointChunk, PointCloudBBox } from '../types.js';
import type { PointSourceInfo } from './types.js';
export type WorkerSourceFormat = 'las' | 'laz' | 'ply' | 'pcd' | 'e57' | 'pts' | 'xyz';
/** main → worker */
export type WorkerRequest = {
    kind: 'open';
    requestId: number;
    format: WorkerSourceFormat;
    blob: Blob;
    label?: string;
    stride: number;
} | {
    kind: 'next';
    requestId: number;
    sourceId: number;
    maxPoints: number;
} | {
    kind: 'close';
    sourceId: number;
} | {
    kind: 'abort';
    sourceId: number;
};
/** worker → main */
export type WorkerResponse = {
    kind: 'opened';
    requestId: number;
    sourceId: number;
    info: PointSourceInfo;
} | {
    kind: 'chunk';
    requestId: number;
    sourceId: number;
    chunk: SerializedChunk | null;
} | {
    kind: 'error';
    requestId: number;
    message: string;
};
/** Wire-friendly chunk: typed-array views replaced by their underlying buffers. */
export interface SerializedChunk {
    positions: ArrayBuffer;
    colors?: ArrayBuffer;
    classifications?: ArrayBuffer;
    intensities?: ArrayBuffer;
    pointCount: number;
    bbox: PointCloudBBox;
}
/** Convert a chunk into a transferable wire payload + transfer list. */
export declare function chunkToWire(chunk: DecodedPointChunk): {
    payload: SerializedChunk;
    transfer: ArrayBuffer[];
};
/** Inverse of `chunkToWire`. */
export declare function chunkFromWire(payload: SerializedChunk): DecodedPointChunk;
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