/**
 * TrackManager - Manages multi-track selection and switching
 */
import type { Track, VideoTrack, AudioTrack, SubtitleTrack } from '../types';
import { EventEmitter } from '../events/EventEmitter';
interface TrackManagerEvents {
    videoTrackChange: VideoTrack | null;
    audioTrackChange: AudioTrack | null;
    subtitleTrackChange: SubtitleTrack | null;
    tracksChange: Track[];
}
export declare class TrackManager extends EventEmitter<TrackManagerEvents> {
    private tracks;
    private activeVideoTrack;
    private activeAudioTrack;
    private activeSubtitleTrack;
    /**
     * Set available tracks
     */
    setTracks(tracks: Track[]): void;
    /**
     * Get all tracks
     */
    getTracks(): Track[];
    /**
     * Identify cover-art / attached-picture video streams (ID3v2 APIC,
     * FLAC PICTURE, MP4 covr, Matroska attachment) so they're excluded
     * from the playable video list and surfaced separately for artwork.
     *
     * Detection is a pure-JS heuristic: a still-image codec (mjpeg / png /
     * jpeg) reporting frameRate 0 (a single cached picture, not a motion
     * stream). We can't use a WASM-side disposition flag — adding the
     * is_attached_pic field to the StreamInfo struct shifts the WASM
     * memory layout and trips a latent FFmpeg audio overflow into a
     * production OOB (see project memory "Album Art Crashes WASM"), so the
     * whole album-art path stays JS-only. Real video is essentially never
     * mjpeg/png-with-zero-fps, so the heuristic is safe in practice.
     */
    private isLikelyCoverArt;
    /**
     * Get video tracks. Excludes embedded cover-art streams (ID3v2 APIC,
     * FLAC PICTURE, etc.) — those are exposed separately via
     * getAttachedPicTracks() so the player doesn't try to feed a one-frame
     * PNG into the video decoder and stall on a never-arriving second frame.
     */
    getVideoTracks(): VideoTrack[];
    /**
     * Cover-art / attached-picture tracks (audio file embedded artwork).
     * Empty for the usual video-with-audio case.
     */
    getAttachedPicTracks(): VideoTrack[];
    /**
     * Get audio tracks
     */
    getAudioTracks(): AudioTrack[];
    /**
     * Get subtitle tracks
     */
    getSubtitleTracks(): SubtitleTrack[];
    /**
     * Get active video track
     */
    getActiveVideoTrack(): VideoTrack | null;
    /**
     * Get active audio track
     */
    getActiveAudioTrack(): AudioTrack | null;
    /**
     * Get active subtitle track
     */
    getActiveSubtitleTrack(): SubtitleTrack | null;
    /**
     * Select video track
     */
    selectVideoTrack(trackId: number): boolean;
    /**
     * Select audio track
     */
    selectAudioTrack(trackId: number): boolean;
    /**
     * Select subtitle track (null to disable)
     */
    selectSubtitleTrack(trackId: number | null): boolean;
    /**
     * Check if packet belongs to an active track
     */
    isActiveStream(streamIndex: number): boolean;
    /**
     * Get track by ID
     */
    getTrackById(trackId: number): Track | undefined;
    /**
     * Clear all tracks
     */
    clear(): void;
}
export {};
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