export interface Webcam {
    (this: Webcam, config: Config): Inst;
    _init(config: Config): Inst | void;
    get_device_list(): Promise<MediaDeviceInfo[] | void>;
    get_inst_by_guid(guid: Guid): Inst | void;
    get_insts(): Inst[] | void;
    destroy(): void;
    fn: WebcamFn;
    v: string;
}
export interface WebcamFn {
    init: Init;
    [s: string]: any;
}
export interface Init {
    new (config: Config): Inst;
    (this: Inst, config: Config): Inst;
    fn: InitFn;
}
export declare const Webcam: Webcam;
export declare type Guid = number;
export declare type CamIdx = number;
export declare type StreamIdx = number;
export declare type DevLabel = string;
export declare type stor = string | HTMLElement;
export declare type ImgDataType = 'dataURL' | 'dataurl' | 'objectURL' | 'objecturl';
export interface BaseConfig {
    debug: boolean;
    useDefault: boolean;
    ctx: stor;
    fps: number;
    previewWidth: number;
    previewHeight: number;
    flipHoriz: boolean;
    width: number;
    height: number;
    imageFormat: 'jpeg' | 'png';
    jpegQuality: number;
    dataType: ImgDataType;
    switchDelay: number;
    snapDelay: number;
    devLabels: string[] | null;
}
export interface Config extends BaseConfig {
    multiOptions?: StreamConfig[] | null;
}
export interface StreamConfig extends BaseConfig {
    streamIdx: StreamIdx;
    deviceName?: string;
    deviceId?: string;
    [prop: string]: any;
}
export interface SnapParams {
    streamIdx: StreamIdx;
    width: number;
    height: number;
    flipHoriz: boolean;
    imageFormat: 'jpeg' | 'png';
    jpegQuality: number;
    dataType: ImgDataType;
    switchDelay: number;
    snapDelay: number;
}
export interface VideoConstraints {
    width: {
        ideal: number;
    };
    height: {
        ideal: number;
    };
    deviceId?: {
        exact: string;
    };
}
export interface InitFn {
    reset(this: Inst): Inst;
    _reset(this: Inst, sidx: StreamIdx): Inst;
    set(this: Inst, sconfig: StreamConfig | StreamConfig[]): Inst;
    _set(this: Inst, sconfig: StreamConfig): void;
    _set_stream_device_label(this: Inst, sconfig: StreamConfig): Inst;
    sidx_exists(this: Inst, sidx: StreamIdx): boolean;
    get_stream_config(this: Inst, sidx: StreamIdx): StreamConfig | void;
    get_all_stream_idx(this: Inst): StreamIdx[];
    release_stream(this: Inst, sidx: StreamIdx): Inst;
    stop_media(this: Inst, sidx: StreamIdx): Inst;
    connect(this: Inst, sidx: StreamIdx): Promise<Inst>;
    connect_next(this: Inst, sidx?: StreamIdx): Promise<Inst>;
    snap(this: Inst, opts?: StreamIdx | SnapParams): Promise<string>;
    prepare_snap_opts(this: Inst, opts: SnapParams | undefined | null): SnapParams | void;
    get_next_sidx(this: Inst, sidx: StreamIdx): StreamIdx;
    get_first_sidx(this: Inst): StreamIdx | void;
}
export interface Inst extends InitFn {
    guid: Guid;
    ctx: HTMLElement | null;
    holder: HTMLDivElement | null;
    video: HTMLVideoElement | null;
    streamMap: Map<StreamIdx, MediaStream>;
    streamConfigMap: Map<StreamIdx, StreamConfig>;
    config: Config;
    inited: boolean;
    live: boolean;
    currStreamIdx: number;
    retryCount: number;
}
export default Webcam;