/** @packageDocumentation Audio properties for ScreamTracker III (S3M) module files. */
import { AudioProperties } from "../audioProperties.js";
import type { ReadStyle } from "../toolkit/types.js";
/**
 * Audio properties for ScreamTracker III (S3M) files.
 *
 * S3M is a tracker module format; it has no defined playback duration in
 * milliseconds. The properties describe module layout rather than a
 * continuous audio stream.
 */
export declare class S3mProperties extends AudioProperties {
    /** Number of active channels in the module. */
    private _channels;
    /** Number of orders (non-skip, non-end entries) in the play sequence. */
    private _lengthInPatterns;
    /** Whether the module uses stereo output (master volume byte bit 7). */
    private _stereo;
    /** Total number of samples/instruments declared in the module header. */
    private _sampleCount;
    /** Total number of pattern slots in the module header. */
    private _patternCount;
    /** Raw flags word from the S3M header. */
    private _flags;
    /** Tracker version encoded in the header (e.g. `0x1320` for ST3 v3.20). */
    private _trackerVersion;
    /** File format version byte from the header. */
    private _fileFormatVersion;
    /** Global volume level (0–64). */
    private _globalVolume;
    /** Master output volume (0–127; bit 7 is the stereo flag). */
    private _masterVolume;
    /** Initial tempo, expressed as rows per beat. */
    private _tempo;
    /** Initial BPM speed (beats per minute). */
    private _bpmSpeed;
    /**
     * Constructs a new `S3mProperties` instance.
     * @param readStyle - The level of detail used when parsing audio properties.
     */
    constructor(readStyle: ReadStyle);
    /**
     * Returns the duration of the track in milliseconds.
     * S3M files have no defined playback duration; always returns `0`.
     * @returns `0`.
     */
    get lengthInMilliseconds(): number;
    /**
     * Returns the number of active channels in the module.
     * @returns The channel count.
     */
    get channels(): number;
    /**
     * Sets the number of active channels.
     * @param value - The channel count.
     */
    set channels(value: number);
    /**
     * Returns the number of orders in the play sequence (real pattern length).
     * @returns The order count.
     */
    get lengthInPatterns(): number;
    /**
     * Sets the number of orders in the play sequence.
     * @param value - The order count.
     */
    set lengthInPatterns(value: number);
    /**
     * Returns whether the module uses stereo output.
     * @returns `true` for stereo, `false` for mono.
     */
    get stereo(): boolean;
    /**
     * Sets whether the module uses stereo output.
     * @param value - `true` for stereo, `false` for mono.
     */
    set stereo(value: boolean);
    /**
     * Returns the total number of samples/instruments in the module.
     * @returns The sample count.
     */
    get sampleCount(): number;
    /**
     * Sets the total number of samples/instruments.
     * @param value - The sample count.
     */
    set sampleCount(value: number);
    /**
     * Returns the total number of pattern slots in the module header.
     * @returns The pattern count.
     */
    get patternCount(): number;
    /**
     * Sets the total number of pattern slots.
     * @param value - The pattern count.
     */
    set patternCount(value: number);
    /**
     * Returns the raw flags word from the S3M header.
     * @returns The flags value.
     */
    get flags(): number;
    /**
     * Sets the raw flags word.
     * @param value - The flags value.
     */
    set flags(value: number);
    /**
     * Returns the tracker version encoded in the S3M header.
     * @returns The tracker version word (e.g. `0x1320` for ST3 v3.20).
     */
    get trackerVersion(): number;
    /**
     * Sets the tracker version word.
     * @param value - The tracker version word.
     */
    set trackerVersion(value: number);
    /**
     * Returns the file format version byte from the S3M header.
     * @returns The file format version.
     */
    get fileFormatVersion(): number;
    /**
     * Sets the file format version byte.
     * @param value - The file format version.
     */
    set fileFormatVersion(value: number);
    /**
     * Returns the global volume level (0–64).
     * @returns The global volume.
     */
    get globalVolume(): number;
    /**
     * Sets the global volume level.
     * @param value - The global volume (0–64).
     */
    set globalVolume(value: number);
    /**
     * Returns the master output volume (0–127; bit 7 is the stereo flag).
     * @returns The master volume.
     */
    get masterVolume(): number;
    /**
     * Sets the master output volume.
     * @param value - The master volume (0–127).
     */
    set masterVolume(value: number);
    /**
     * Returns the initial tempo, expressed as rows per beat.
     * @returns The tempo value.
     */
    get tempo(): number;
    /**
     * Sets the initial tempo.
     * @param value - The tempo (rows per beat).
     */
    set tempo(value: number);
    /**
     * Returns the initial BPM speed (beats per minute).
     * @returns The BPM speed.
     */
    get bpmSpeed(): number;
    /**
     * Sets the initial BPM speed.
     * @param value - The BPM speed (beats per minute).
     */
    set bpmSpeed(value: number);
}
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