/**
 * @fileoverview BWF (`bext` + iXML) operations, factored out of AudioFileImpl
 * to keep that file under the size limit. Each function takes the raw FileHandle
 * plus the already-resolved format string (for the unsupported-format guard).
 */
import type { FileHandle } from "../wasm.js";
import type { BroadcastAudioExtension } from "../types/bwf.js";
export declare function getBextData(handle: FileHandle): Uint8Array | undefined;
export declare function setBextData(handle: FileHandle, format: string, data: Uint8Array | null): void;
export declare function getBext(handle: FileHandle): BroadcastAudioExtension | undefined;
export declare function setBext(handle: FileHandle, format: string, bext: BroadcastAudioExtension): void;
export declare function getIxml(handle: FileHandle): string | undefined;
export declare function setIxml(handle: FileHandle, format: string, data: string | null): void;
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