import { QrcodeResult, Html5QrcodeSupportedFormats, Logger, RobustQrcodeDecoderAsync } from "./core";
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export declare class Html5QrcodeShim implements RobustQrcodeDecoderAsync {
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private verbose;
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private primaryDecoder;
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private secondaryDecoder;
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private readonly EXECUTIONS_TO_REPORT_PERFORMANCE;
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private executions;
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private executionResults;
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private wasPrimaryDecoderUsedInLastDecode;
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constructor(requestedFormats: Array<Html5QrcodeSupportedFormats>, useBarCodeDetectorIfSupported: boolean, verbose: boolean, logger: Logger);
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decodeAsync(canvas: HTMLCanvasElement): Promise<QrcodeResult>;
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decodeRobustlyAsync(canvas: HTMLCanvasElement): Promise<QrcodeResult>;
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private getDecoder;
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private possiblyLogPerformance;
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possiblyFlushPerformanceReport(): void;
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}
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