import * as spec from '@galacean/effects-specification';
import { Playable, PlayableAsset, PlayableOutput } from './playable';
import { ParticleSystem } from '../particle/particle-system';
import type { Constructor } from '../../utils';
import { TrackMixerPlayable } from './playables';
/**
 * @since 2.0.0
 */
export declare class TimelineClip {
    id: string;
    name: string;
    start: number;
    duration: number;
    asset: PlayableAsset;
    endBehavior: spec.EndBehavior;
    constructor();
    toLocalTime(time: number): number;
}
/**
 * @since 2.0.0
 */
export declare class TrackAsset extends PlayableAsset {
    name: string;
    parent: TrackAsset;
    trackType: TrackType;
    private clipSeed;
    private clips;
    protected children: TrackAsset[];
    /**
     * 重写该方法以获取自定义对象绑定
     */
    updateAnimatedObject(boundObject: object): object;
    /**
     * 重写该方法以创建自定义混合器
     */
    createTrackMixer(): TrackMixerPlayable;
    createOutput(): PlayableOutput;
    createPlayableGraph(runtimeClips: RuntimeClip[]): TrackMixerPlayable;
    createMixerPlayableGraph(runtimeClips: RuntimeClip[]): TrackMixerPlayable;
    compileClips(timelineClips: TimelineClip[], runtimeClips: RuntimeClip[]): TrackMixerPlayable;
    createPlayable(): Playable;
    getChildTracks(): TrackAsset[];
    addChild(child: TrackAsset): void;
    createClip<T extends PlayableAsset>(classConstructor: Constructor<T>, name?: string): TimelineClip;
    getClips(): TimelineClip[];
    findClip(name: string): TimelineClip | undefined;
    addClip(clip: TimelineClip): void;
    private createClipPlayable;
    fromData(data: spec.EffectsObjectData): void;
}
export declare enum TrackType {
    MasterTrack = 0,
    ObjectTrack = 1
}
export declare class RuntimeClip {
    clip: TimelineClip;
    playable: Playable;
    parentMixer: TrackMixerPlayable;
    private particleSystem;
    constructor(clip: TimelineClip, clipPlayable: Playable, parentMixer: TrackMixerPlayable);
    set enable(value: boolean);
    getParticleSystem(): ParticleSystem;
    evaluateAt(localTime: number): void;
}
/**
 * @since 2.0.0
 */
export interface TimelineClipData {
    asset: PlayableAsset;
}