import { ArgumentMetadata, PipeTransform } from '@nestjs/common';
export interface JpegParam {
    quality?: number;
    progressive?: boolean;
}
export declare type JpegPipeOptions = {
    opts?: JpegParam;
    param?: string;
};
/**
 * jpeg 专用的配置信息处理器
 */
export declare class JpegPipe implements PipeTransform {
    transform(value: any, { metatype }: ArgumentMetadata): Promise<JpegPipeOptions>;
}