/**
 * ZBar C/C++ WASM decode — primary live camera engine for retail EAN/UPC/Code128 + QR.
 * Uses @undecaf/zbar-wasm (same engine as the BarcodeDetector polyfill).
 *
 * Apps must call {@link setZbarWasmUrl} once at boot with a same-origin
 * `zbar.wasm?url` (Vite) so CSP + bundlers resolve the binary.
 */
import { ZBarScanner } from '@undecaf/zbar-wasm';
import type { BarcodeScannerFormatProfile } from './scannerFormats.js';
export interface ZbarDecodeFrameOptions {
    /** When true, decode full frame only (every other ticks — G9 CPU bound). */
    readonly quickOnly?: boolean;
}
/**
 * CSP-safe same-origin URL for `zbar.wasm`. Call once before any scan session.
 */
export declare function setZbarWasmUrl(url: string): void;
export declare function isZbarWasmUrlConfigured(): boolean;
/** Test-only — reset boot flag between Jest cases. */
export declare function resetZbarWasmUrlForTests(): void;
/**
 * Build a ZBar scanner enabled only for the active format profile.
 * Dense X/Y scan + inverted retry for close / low-contrast retail labels.
 */
export declare function createConfiguredZbarScanner(formatProfile?: BarcodeScannerFormatProfile): Promise<ZBarScanner>;
/**
 * Multi-pass digital crops → ZBar `scanImageData`.
 * Returns first non-empty payload or null.
 */
export declare function decodeVideoFrameWithZbar(video: HTMLVideoElement, canvas: HTMLCanvasElement, scanner: ZBarScanner, options?: ZbarDecodeFrameOptions): Promise<string | null>;
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