/**
 * PLY streaming source — whole-file decode, single chunk.
 *
 * PLY isn't an octree format, so we don't get incremental visibility
 * benefits from chunked decode. Reading the whole file once and emitting
 * one chunk is simpler and correct.  Memory is still bounded by
 * `streamPointCloud`'s 25M-point cap — for files past that, the stride
 * downsample applies on the way out.
 */
import type { DecodedPointChunk } from '../types.js';
import type { DownsampleHint, PointSourceInfo, StreamingPointSource } from './types.js';
export declare class PlyStreamingSource implements StreamingPointSource {
    private blob;
    private downsample;
    private label?;
    private chunk;
    private served;
    constructor(blob: Blob, options?: {
        label?: string;
        downsample?: DownsampleHint;
    });
    open(signal?: AbortSignal): Promise<PointSourceInfo>;
    next(maxPoints: number, signal?: AbortSignal): Promise<DecodedPointChunk | null>;
    close(): void;
}
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