/**
 * Format detection by magic bytes.
 *
 * Never trust a file extension — uploads are routinely mislabelled, and a
 * `.wav` that is really an MP3 is common enough that content sniffing is the
 * only reliable path.
 *
 * Formats audiobox cannot decode are still *detected*, so the error can say
 * "this is an Ogg file, which audiobox doesn't read" instead of the useless
 * "unrecognised data". Knowing what you handed over is most of the debugging.
 */
import type { AudioFormat } from '../types.js';
/** A container audiobox recognises but does not decode. */
export type KnownUndecodableFormat = 'ogg' | 'mp4' | 'webm' | 'wavpack' | 'ape' | 'musepack' | 'amr' | 'midi';
export type SniffResult = {
    kind: 'supported';
    format: AudioFormat;
} | {
    kind: 'unsupported';
    format: KnownUndecodableFormat;
    label: string;
} | {
    kind: 'unknown';
};
/** Identifies the container in `input` from its leading bytes. */
export declare function sniff(input: Uint8Array): SniffResult;
//# sourceMappingURL=sniff.d.ts.map