/**
 * PTS / XYZ streaming source — whole-file ASCII decode.
 *
 * ASCII formats don't support random-access seek by point index, so
 * we read the whole blob, decode once, and serve as a single chunk.
 * Memory is still bounded by the host's 25M-point cap via the
 * `stride` downsample applied here.
 *
 * The whole-file approach is simpler and matches PLY's behaviour;
 * for files past the cap we apply stride downsampling on the way
 * out so the GPU upload stays bounded.
 */
import type { DecodedPointChunk } from '../types.js';
import { type AsciiPointsFormat } from '../formats/ascii-points.js';
import type { DownsampleHint, PointSourceInfo, StreamingPointSource } from './types.js';
export declare class AsciiPointsStreamingSource implements StreamingPointSource {
    private blob;
    private format;
    private downsample;
    private label?;
    private chunk;
    private served;
    constructor(blob: Blob, format: AsciiPointsFormat, options?: {
        label?: string;
        downsample?: DownsampleHint;
    });
    open(signal?: AbortSignal): Promise<PointSourceInfo>;
    next(maxPoints: number, signal?: AbortSignal): Promise<DecodedPointChunk | null>;
    close(): void;
}
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