import { ImageDataLike, WasmSource } from "./common.js";
export declare enum ColorSpace {
    GRAYSCALE = 1,
    RGB = 2,
    YCbCr = 3
}
export declare enum Quantization {
    JPEG_Annex_K = 0,
    Flat = 1,
    MSSIM_Tuned_Kodak = 2,
    ImageMagick = 3,
    PSNR_HVS_M_Tuned_Kodak = 4,
    Klein_Silverstein_Carney = 5,
    Watson_Taylor_Borthwick = 6,
    Ahumada_Watson_Peterson = 7,
    Peterson_Ahumada_Watson = 8
}
export interface Options {
    /**
     * Compression quality [0..100], 5-95 is most useful range.
     *
     * @default 75
     */
    quality?: number;
    /**
     * Create baseline JPEG file (disable progressive coding).
     *
     * @default false
     */
    baseline?: boolean;
    /**
     * Use arithmetic coding.
     *
     * @default false
     */
    arithmetic?: boolean;
    /**
     * Create progressive JPEG file.
     *
     * @default true
     */
    progressive?: boolean;
    /**
     * Optimize Huffman table (smaller file, but slow compression)
     *
     * @default true
     */
    optimizeCoding?: boolean;
    /**
     * Smooth dithered input (N=1..100 is strength)
     *
     * @default 0
     */
    smoothing?: number;
    /**
     * @default ColorSpace.YCbCr
     */
    colorSpace?: ColorSpace;
    /**
     * Select the predefined quantization table to use.
     *
     * @default Quantization.ImageMagick
     */
    quantTable?: Quantization;
    /**
     * use scans in trellis optimization.
     *
     * @default false
     */
    trellisMultipass?: boolean;
    /**
     * optimize for sequences of EOB
     */
    trellisOptZero?: boolean;
    /**
     * optimize quant table in trellis loop.
     *
     * @default false
     */
    trellisOptTable?: boolean;
    /**
     * number of trellis loops.
     *
     * @default 1
     */
    trellisLoops?: number;
    autoSubsample?: boolean;
    chromaSubsample?: number;
    separateChromaQuality?: boolean;
    chromaQuality?: number;
}
export declare const defaultOptions: Required<Options>;
export declare const bitDepth: number[];
export declare const mimeType = "image/jpeg";
export declare const extension = "jpg";
export declare function loadEncoder(input?: WasmSource): Promise<any>;
export declare const loadDecoder: typeof loadEncoder;
export declare function encode(image: ImageDataLike, options?: Options): Uint8Array;
export declare function decode(input: BufferSource): ImageData;