/** @packageDocumentation ID3v2 podcast marker frame (PCST). An iTunes-specific 4-byte marker that identifies a file as a podcast. */
import { ByteVector } from "../../../byteVector.js";
import { Id3v2Frame, Id3v2FrameHeader } from "../id3v2Frame.js";
/**
 * Podcast frame (PCST) – an iTunes-specific marker frame.
 *
 * This is a simple frame with a fixed 4-byte payload of 0x00000000.
 */
export declare class PodcastFrame extends Id3v2Frame {
    /** Creates a new PCST frame with the fixed iTunes podcast marker payload. */
    constructor();
    /**
     * Returns the frame identifier string.
     * @returns The string `"PCST"`.
     */
    toString(): string;
    /** @internal Create from raw frame data. */
    static fromData(data: ByteVector, header: Id3v2FrameHeader, version: number): PodcastFrame;
    /**
     * No fields to parse; the payload is ignored.
     * @param _data - Raw field bytes (ignored).
     * @param _version - ID3v2 version (ignored).
     */
    protected parseFields(_data: ByteVector, _version: number): void;
    /**
     * Serialises the frame as a fixed 4-byte zero-filled payload.
     * @param _version - ID3v2 version (ignored).
     * @returns Always returns a 4-byte zero-filled `ByteVector`.
     */
    protected renderFields(_version: number): ByteVector;
}
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