import { Timerange } from './time_util';
import { Media_segment } from './segment';
import { AudioMaterial } from './local_materials';
import { Effect_param_instance } from '../data';
import { Audio_scene_effect_type, Tone_effect_type, Speech_to_song_type } from '../data';
export declare class AudioFade {
    fade_id: string;
    in_duration: number;
    out_duration: number;
    effect_id: any;
    constructor(in_duration: number, out_duration: number);
    export_json(): Record<string, any>;
}
type AudioEffectCategory = "sound_effect" | "tone" | "speech_to_song";
type AudioEffectCategoryName = "场景音" | "音色" | "声音成曲";
export declare class AudioEffect {
    name: string;
    effect_id: string;
    resource_id: string;
    category_id: AudioEffectCategory;
    category_name: AudioEffectCategoryName;
    audio_adjust_params: Effect_param_instance[];
    constructor(effect_meta: Audio_scene_effect_type | Tone_effect_type | Speech_to_song_type | any, params?: (number | null)[]);
    export_json(): Record<string, any>;
}
export declare class AudioSegment extends Media_segment {
    material_instance: AudioMaterial;
    fade?: AudioFade;
    effects: AudioEffect[];
    constructor(material: AudioMaterial, targetTimerange: Timerange, { sourceTimerange, speed, volume }?: {
        sourceTimerange?: Timerange;
        speed?: number;
        volume?: number;
    });
    addEffect(effectType: Audio_scene_effect_type | Tone_effect_type | Speech_to_song_type | any, params?: (number | null)[]): this;
    addFade(inDuration: string | number, outDuration: string | number): this;
    addKeyframe(timeOffset: number, volume: number): this;
    export_json(): Record<string, any>;
}
export {};