/**
 * @karaoke-migrate/kar-player
 *
 * KAR (Karaoke) file player library
 *
 * Features:
 * - Parse KAR files (MIDI + lyrics)
 * - Play MIDI audio using SpessaSynth
 * - Render synchronized lyrics
 * - Background playback support
 */
import { MIDIPlayer } from './core/MIDIPlayer';
import type { KaraokePlayerConfig, KaraokePlayerState, LoadKarFileResult } from './types';
declare const KarFile: any;
declare const MIDIFile: any;
export { KarFile, MIDIFile, MIDIPlayer };
export { convertEmkToKarBrowser, isEmkFile, isEmkFilename, getFileExtension, type EmkConversionResult } from './utils/EmkConverter';
export { SpessaSynthWrapper } from './utils/SpessaSynthWrapper';
export { AudioContextGuard, type AudioContextGuardConfig, type AudioContextState } from './utils/AudioContextGuard';
export { SequencerTimingHelper, type TimeSource } from './utils/SequencerTimingHelper';
export { LyricRenderer } from './utils/LyricRenderer';
export { PageVisibilityManager, getPageVisibilityManager, enableSmoothTabSwitching, type PageVisibilityOptions } from './utils/PageVisibilityManager';
export { loadGoogleFont, applyFontToLyrics, getFontConfig, getFontFamily, isValidThaiFont, getAvailableThaifonts, autoLoadFontFromEnv, THAI_FONTS } from './utils/GoogleFonts';
export type { ThaiGoogleFont } from './utils/GoogleFonts';
export { isThaiVowelOrDiacritic, isOnlyThaiVowels, mergeThaiVowelsWithPreviousParts, normalizeThaiText, splitThaiText } from './utils/ThaiTextUtils';
export { isProduction, devLog, devWarn, devError, rafThrottle, debounce, shallowArrayEqual, isLowEndDevice, requestIdleCallback, cancelIdleCallback, getGPUOptimizedStyle, batchDOMUpdates } from './utils/PerformanceOptimizer';
export { DOMElementPool, LazyRenderer, WeakCache, FrameBudgetManager, VirtualScroller, AdaptiveQuality, BatchScheduler, MemoryMonitor } from './utils/AdvancedPerformance';
export { MIDIEventCache, InstrumentCache, LyricCache, SeekOptimizer, ProgressivePreloader } from './utils/PreloadCache';
export type { PreloadRange, CacheStats } from './utils/PreloadCache';
export { LyricHighlighter, getLyricAtTime, getLyricsInRange, getLyricsDuration, searchLyrics, useLyricHighlight, useLyricRenderer, useLyricRendererOptimized, useLyricText, defaultTheme, karaokeTheme, minimalTheme, extremeKaraokeTheme, themes, getTheme, registerTheme, loadEnvConfig, envConfigToDisplayOptions, envConfigToTheme, createThemeFromEnv, loadDisplayOptionsFromEnv, mergeWithEnvConfig } from './components';
export type { UseLyricHighlightOptions, UseLyricHighlightReturn, UseLyricRendererOptions, UseLyricRendererReturn, UseLyricRendererOptimizedOptions, UseLyricRendererOptimizedReturn, UseLyricTextOptions, UseLyricTextReturn, LyricTextElement, EnvLyricConfig } from './components';
export type { KaraokePlayerConfig, KaraokePlayerState, LoadKarFileResult, KarFileLyricLine, KarFileLyricPart, KarFileMidiData, MIDISong, MIDITrack, MIDINote, MIDIBeat, MIDIBeatNote, LyricLine, LyricPart } from './types';
/**
 * Main KaraokePlayer class
 */
export declare class KaraokePlayer {
    private midiPlayer;
    private spessaWrapper;
    private audioGuard;
    private lyricRenderer;
    private timingHelper;
    private audioContext;
    private state;
    private onStateChange?;
    constructor(config: KaraokePlayerConfig);
    /**
     * Initialize SpessaSynth and load soundfont
     * @param soundFont - URL string or ArrayBuffer of the soundfont file
     * @param bankName - SoundFont bank name (default: 'main')
     * @param processorUrl - Required URL to spessasynth_processor.min.js
     */
    loadSoundFont(soundFont: string | ArrayBuffer, bankName: string | undefined, processorUrl: string): Promise<void>;
    /**
     * Load KAR file
     */
    loadKarFile(buffer: ArrayBuffer | Uint8Array): Promise<LoadKarFileResult>;
    /**
     * Set lyric renderer container
     */
    setLyricContainer(container: HTMLElement): void;
    /**
     * Play
     */
    play(): Promise<void>;
    /**
     * Pause
     */
    pause(): void;
    /**
     * Stop
     */
    stop(): void;
    /**
     * Seek to position
     */
    seek(time: number): void;
    /**
     * Set volume (0.0 - 1.0)
     */
    setVolume(volume: number): void;
    /**
     * Get current state
     */
    getState(): KaraokePlayerState;
    /**
     * Set state change callback
     */
    onStateChangeCallback(callback: (state: KaraokePlayerState) => void): void;
    /**
     * Cleanup
     */
    destroy(): void;
}