/**
 * SpzCodec - Niantic SPZ v2/v3 Gaussian Splat Codec
 *
 * Production-quality codec implementing the Niantic SPZ compressed format
 * for 3D Gaussian splats. Achieves ~90% compression vs PLY with virtually
 * no perceptible quality loss.
 *
 * SPZ binary layout (after gzip decompression):
 *   [Header: 16 bytes]
 *   [Positions: N * 9 bytes (3 coords * 3 bytes, 24-bit signed fixed-point)]
 *   [Alphas: N * 1 byte (sigmoid-compressed opacity)]
 *   [Colors: N * 3 bytes (SH DC coefficients, uint8)]
 *   [Scales: N * 3 bytes (log-encoded, uint8)]
 *   [Rotations: N * 3 bytes (v2, first-three) or N * 4 bytes (v3, smallest-three)]
 *   [SH coefficients: N * shDim * 3 bytes (optional higher-order SH)]
 *
 * Supports:
 *   - SPZ v1, v2, v3 decoding
 *   - SPZ v2 encoding (3-byte first-three quaternion packing)
 *   - SPZ v3 encoding (4-byte smallest-three quaternion packing, default)
 *   - Streaming decode via gzip DecompressionStream
 *   - Memory budget pre-check (G.030.06)
 *
 * References:
 *   - W.031: SPZ decompression with fixed-point dequantization
 *   - W.038: Dual standardization track codec abstraction
 *   - G.030.04: SPZ buffer validation
 *   - G.030.06: WebGPU memory ceiling on mobile VR
 *
 * @module gpu/codecs
 * @version 1.0.0
 */
import { AbstractGaussianCodec } from './IGaussianCodec.js';
import type { GaussianSplatData, EncodedGaussianData, GaussianCodecCapabilities, GaussianEncodeOptions, GaussianDecodeOptions, GaussianStreamDecodeOptions, CodecResult, CodecMetadata } from './types.js';
export declare class SpzCodec extends AbstractGaussianCodec {
    private readonly codecId;
    constructor();
    getCapabilities(): GaussianCodecCapabilities;
    canDecode(buffer: ArrayBuffer): boolean;
    decompress(compressed: ArrayBuffer): Promise<ArrayBuffer>;
    extractMetadata(buffer: ArrayBuffer): Promise<CodecMetadata>;
    decode(buffer: ArrayBuffer, options?: GaussianDecodeOptions): Promise<CodecResult<GaussianSplatData>>;
    encode(data: GaussianSplatData, options?: GaussianEncodeOptions): Promise<CodecResult<EncodedGaussianData>>;
    stream(source: string | ReadableStream<Uint8Array>, options?: GaussianStreamDecodeOptions): AsyncIterable<CodecResult<GaussianSplatData>>;
}
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