/** @packageDocumentation Audio properties for Matroska/WebM files. */
import { AudioProperties } from "../audioProperties.js";
import { ReadStyle } from "../toolkit/types.js";
/**
 * Audio properties for Matroska files (MKV, MKA, WebM).
 */
export declare class MatroskaProperties extends AudioProperties {
    /** Playback duration in milliseconds. */
    private _lengthMs;
    /** Bitrate in kbit/s, or -1 if not yet computed. */
    private _bitrate;
    /** Sample rate in Hz. */
    private _sampleRate;
    /** Number of audio channels. */
    private _channels;
    /** Bits per sample (bit depth), or 0 if unspecified. */
    private _bitsPerSample;
    /** Codec identifier string (e.g. `"A_AAC"`, `"A_FLAC"`). */
    private _codecName;
    /** EBML DocType string (e.g. `"matroska"`, `"webm"`). */
    private _docType;
    /** EBML DocTypeVersion number. */
    private _docTypeVersion;
    /** Segment title from the Info element. */
    private _title;
    /** Total file length in bytes, used for bitrate estimation. */
    private _fileLength;
    /**
     * Construct audio properties with the given read style.
     * @param readStyle - Detail level for audio property parsing.
     */
    constructor(readStyle?: ReadStyle);
    /** Playback duration in milliseconds. */
    get lengthInMilliseconds(): number;
    /** Bitrate in kbit/s, computed lazily from file length and duration. */
    get bitrate(): number;
    /** Sample rate in Hz. */
    get sampleRate(): number;
    /** Number of audio channels. */
    get channels(): number;
    /** Bits per sample (bit depth), or 0 if unspecified. */
    get bitsPerSample(): number;
    /** Codec identifier string (e.g. `"A_AAC"`, `"A_FLAC"`). */
    get codecName(): string;
    /** EBML DocType string (e.g. `"matroska"`, `"webm"`). */
    get docType(): string;
    /** EBML DocTypeVersion number. */
    get docTypeVersion(): number;
    /** Segment title from the Info element. */
    get title(): string;
    /** @param ms - Playback duration in milliseconds. */
    setLengthInMilliseconds(ms: number): void;
    /** @param rate - Sample rate in Hz. */
    setSampleRate(rate: number): void;
    /** @param ch - Number of audio channels. */
    setChannels(ch: number): void;
    /** @param bits - Bits per sample (bit depth). */
    setBitsPerSample(bits: number): void;
    /** @param name - Codec identifier string. */
    setCodecName(name: string): void;
    /** @param type - EBML DocType string. */
    setDocType(type: string): void;
    /** @param version - EBML DocTypeVersion number. */
    setDocTypeVersion(version: number): void;
    /** @param title - Segment title. */
    setTitle(title: string): void;
    /** @param length - Total file length in bytes. */
    setFileLength(length: number): void;
}
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