/**
 * Copyright 2025 Angus.Fenying <fenying@litert.org>
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import type * as dL from '../../Decl';
export declare class WsStandardDecoder implements dL.IDecoder {
    readonly maxMessageSize: number;
    /**
     * The current state of the decoder.
     */
    private _state;
    /**
     * The buffer for reading header of each frame.
     */
    private readonly _bdrBuf;
    /**
     * How many bytes have been read into `_bdrBuf`.
     */
    private _hdrBufFilled;
    /**
     * The expected size of header of each frame.
     */
    private _hdrSize;
    /**
     * The header of each frame
     */
    private _frameHeader;
    /**
     * The reader for a whole message.
     */
    private _msg;
    /**
     * How many bytes have been read from current frame.
     */
    private _frameFilled;
    /**
     * How many bytes have been read into the reader stream.
     */
    private _frameTotal;
    constructor(maxMessageSize: number);
    protected _resetFrame(): void;
    reset(): void;
    private _calcFrameHeaderSize;
    private _setupFrame;
    decode(buf: Buffer): dL.IMessageReadStream[];
}
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