/** @packageDocumentation Synchsafe integer encoding and decoding utilities for ID3v2 tags. */
import { ByteVector } from "../../byteVector.js";
/**
 * Synchsafe integer encoding/decoding for ID3v2.
 *
 * ID3v2 uses "synchsafe integers" where the most significant bit of each byte
 * is always zero, giving 7 bits of data per byte. This avoids false MPEG sync
 * signals (0xFF followed by a byte with bit 7 set) in the tag data.
 */
export declare class SynchData {
    /**
     * Decode a synchsafe integer to a normal unsigned number.
     * Each byte contributes 7 bits. Up to 4 bytes are read (28 bits of data).
     *
     * If any byte has bit 7 set, the data is assumed to have been written by
     * buggy software as a normal big-endian integer and is decoded accordingly.
     */
    static toUInt(data: ByteVector): number;
    /**
     * Encode a normal unsigned number to a 4-byte synchsafe ByteVector.
     */
    static fromUInt(value: number): ByteVector;
    /**
     * Decode synchsafe data by removing false sync bytes.
     * Any 0x00 byte following a 0xFF byte is stripped out.
     */
    static decode(data: ByteVector): ByteVector;
    /**
     * Encode data to synchsafe form by inserting a 0x00 byte after every 0xFF.
     */
    static encode(data: ByteVector): ByteVector;
}
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