import type { StreamingPointSource } from './types.js';
export type DecodeWorkerFormat = 'las' | 'laz' | 'ply' | 'pcd' | 'e57' | 'pts' | 'xyz';
export interface DecodeWorkerOptions {
    /**
     * Override the worker constructor — useful for tests or custom bundlers.
     * May return a Worker synchronously or a Promise resolving to one; the
     * client handles both. Sync callbacks remain the common case and stay
     * type-compatible with the previous signature.
     */
    spawn?: () => Worker | Promise<Worker>;
}
/**
 * Reset hook for the module-level cache. Exported only for tests so the
 * "construction does not trigger spawn" and "rejected cache is cleared"
 * regression tests can start from a known clean slate.
 *
 * @internal
 */
export declare function __resetSharedSessionForTests(): void;
export interface CreateDecodeWorkerSourceOptions extends DecodeWorkerOptions {
    format: DecodeWorkerFormat;
    blob: Blob;
    label?: string;
    /** stride>1 → drop every Nth point on decode for memory bounds. */
    stride?: number;
}
/**
 * Build a `StreamingPointSource` that runs decode work in the shared
 * worker. The caller drives `open()` / `next()` / `close()` exactly
 * like the in-process `LasStreamingSource`.
 */
export declare function createDecodeWorkerSource(opts: CreateDecodeWorkerSourceOptions): StreamingPointSource;
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