export interface Interval {
    symbol: number;
    low: number;
    length: number;
    high: number;
}
export declare class Coder {
    protected probabilities_: number[];
    protected low_: number;
    protected high_: number;
    protected underflow_: number;
    protected working_: number;
    protected intervals_: {
        [index: number]: Interval;
    };
    protected total_: number;
    protected input_: number[];
    protected output_: number[];
    constructor(probs: number[]);
    static adjustProbs_: (probs: number[]) => number[];
}
export declare class Encoder extends Coder {
    encode: (input: ArrayBuffer) => ArrayBuffer;
    private init_;
    private encodeSymbol_;
    private renormalize_;
    private flush_;
    private write_;
}
export declare class Decoder extends Coder {
    decode: (input: ArrayBuffer) => ArrayBuffer;
    private init_;
    private decodeSymbols_;
    private decodeSymbol_;
    private renormalize_;
    private update_;
    private flush_;
}