/** CRC-32 (IEEE, as gzip), which event-stream uses for both checksums. */
export declare function crc32(bytes: Uint8Array): number;
export type EventHeaders = Readonly<Record<string, string>>;
/** One event-stream message. */
export declare function encodeMessage(headers: EventHeaders, payload: Uint8Array): Uint8Array;
/** Reads one message. Throws on a truncated or corrupted frame. */
export declare function decodeMessage(buffer: ArrayBuffer): {
    headers: EventHeaders;
    payload: Uint8Array;
};
/** An AudioEvent carrying 16-bit PCM. An empty one ends the stream. */
export declare function audioEvent(pcm: Uint8Array): Uint8Array;
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