/** @packageDocumentation Audio properties implementation for the DSF (DSD Stream File) format. */
import { AudioProperties } from "../audioProperties.js";
import { ByteVector } from "../byteVector.js";
import type { ReadStyle } from "../toolkit/types.js";
/**
 * Audio properties for DSD Stream File (DSF) format.
 *
 * Constructed from the 36-byte payload of the "fmt " chunk (after chunk
 * header). The data layout is all little-endian:
 *   formatVersion (4) + formatID (4) + channelType (4) + channels (4) +
 *   sampleRate (4) + bitsPerSample (4) + sampleCount (8) +
 *   blockSizePerChannel (4)
 */
export declare class DsfProperties extends AudioProperties {
    /** Format version from the "fmt " chunk (must be 1). */
    private _formatVersion;
    /** Format ID: 0 = DSD uncompressed. */
    private _formatID;
    /** Channel type identifier (e.g. 2 = stereo). */
    private _channelType;
    /** Number of audio channels. */
    private _channels;
    /** Sample rate in Hz (e.g. 2822400 for DSD64). */
    private _sampleRate;
    /** Number of bits per sample (typically 1 for DSD). */
    private _bitsPerSample;
    /** Total number of sample frames across all channels. */
    private _sampleCount;
    /** Block size per channel in bytes. */
    private _blockSizePerChannel;
    /** Approximate bitrate in kbit/s. */
    private _bitrate;
    /** Track duration in milliseconds. */
    private _lengthInMs;
    /**
     * Constructs DSF audio properties by parsing the "fmt " chunk payload.
     * @param data Raw bytes from the "fmt " chunk payload (at least 36 bytes).
     * @param readStyle Read style hint (passed to the base class).
     */
    constructor(data: ByteVector, readStyle: ReadStyle);
    /** Track duration in milliseconds. */
    get lengthInMilliseconds(): number;
    /** Approximate bitrate in kbit/s. */
    get bitrate(): number;
    /** Sample rate in Hz. */
    get sampleRate(): number;
    /** Number of audio channels. */
    get channels(): number;
    /** Format version number from the "fmt " chunk (must be 1). */
    get formatVersion(): number;
    /** Format ID: 0 indicates DSD uncompressed audio. */
    get formatID(): number;
    /** Channel type identifier (e.g. 2 = stereo, 3 = 3 channels). */
    get channelType(): number;
    /** Number of bits per sample (typically 1 for DSD). */
    get bitsPerSample(): number;
    /** Total number of sample frames across all channels. */
    get sampleCount(): bigint;
    /** Block size per channel in bytes. */
    get blockSizePerChannel(): number;
    /**
     * Parses the "fmt " chunk payload into audio property fields.
     * @param data Raw bytes from the "fmt " chunk (at least 36 bytes, little-endian).
     */
    private read;
}
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