import { AudioRangeExportOptions, AudioExtensions, ExportOptions, ExportResult, MediaExtensions } from '../../index';
import { FFmpeg as RootFFmpeg } from '../../libs/ffmpeg';
declare enum AudioMixResults {
    SUCCESS = "success",
    ERROR = "error",
    NO_OUTPUT = "no_output"
}
export declare class Renderer {
    private static readonly AUDIO_MIX_SAMPLE_RATE;
    private rendering;
    private isBackgrounded;
    private isCanceled;
    private watermarkSprite;
    private audioWorker;
    private originalWidth;
    private originalHeight;
    private originalResolution;
    private ensureWorkerDir;
    private mountMediaInWorker;
    constructor();
    destroy(): void;
    private visibilityChangeHandler;
    private residentTimeout;
    isRendering(): boolean;
    /**
     * Cancels the current render.
     *
     * Returns a promise that is resolved when the render is canceled or times out (10 seconds).
     * If the render is not currently running, the promise is resolved immediately.
     * If the render times out, the promise is rejected with an error.
     */
    cancelExport(): Promise<void>;
    private generateAudioMixWorker;
    private buildATempoChain;
    private getMixedAudioOutputPath;
    private getAudioMixSamplePosition;
    private generateAudioMix;
    private glClientWaitAsync;
    private getBufferSubDataAsync;
    private readPixelsAsync;
    private flipPixelsYInPlace;
    private waitForClipsProcessing;
    private preRender;
    private postRender;
    private resetAfterAudioOnlyRender;
    private getAudioMimeType;
    private buildRangeAwareFadeInFilter;
    private buildRangeAwareFadeOutFilter;
    renderAudioRange(payload: AudioRangeExportOptions): Promise<ExportResult | null>;
    private sleep;
    render(payload?: ExportOptions): Promise<ExportResult | null>;
    render_with_frames(payload?: ExportOptions): Promise<ExportResult | null>;
    muxVideo(ffmpeg: RootFFmpeg, mixGenerated: AudioMixResults, extension: MediaExtensions, audioExtension: AudioExtensions): Promise<ExportResult>;
    muxChunkedVideo(ffmpeg: RootFFmpeg, mixGenerated: AudioMixResults, extension: MediaExtensions, audioExtension: AudioExtensions, from: number, to: number, outputFiles: string[]): Promise<ExportResult>;
}
export {};