import type { Project } from '../app/Project';
import type { AssetInfo, RendererResult, RendererSettings } from '../app/Renderer';
/**
 * The static interface for exporters.
 */
export interface ExporterClass {
    /**
     * The unique identifier of this exporter.
     *
     * @remarks
     * This identifier will be used to store the settings of this exporter.
     * It's recommended to prepend it with the name of the package to avoid
     * collisions.
     */
    readonly id: string;
    /**
     * The name of this exporter.
     *
     * @remarks
     * This name will be displayed in the editor.
     */
    readonly displayName: string;
    /**
     * Create an instance of this exporter.
     *
     * @remarks
     * A new exporter is created whenever the user starts a new rendering process.
     *
     * @param project - The current project.
     * @param settings - The rendering settings.
     */
    create(project: Project, settings: RendererSettings): Promise<Exporter>;
}
/**
 * The main interface for implementing custom exporters.
 */
export interface Exporter {
    /**
     * Prepare the rendering configuration.
     *
     * @remarks
     * Called at the beginning of the rendering process, before anything else has
     * been set up. The returned value can be used to override the rendering
     * settings provided by the user.
     */
    configuration?(): Promise<RendererSettings | void>;
    /**
     * Begin the rendering process.
     *
     * @remarks
     * Called after the rendering has been set up, right before the first frame
     * is rendered. Once `start()` is called, it is guaranteed that the `stop()`
     * method will be called as well. Can be used to initialize any resources that
     * require a clean-up.
     */
    start?(): Promise<void>;
    /**
     * Export a frame.
     *
     * @remarks
     * Called each time after a frame is rendered.
     *
     * @param canvas - A canvas containing the rendered frame.
     * @param frame - The frame number.
     * @param sceneFrame - The frame number within the scene.
     * @param sceneName - The name of the scene with which the frame is associated.
     * @param signal - An abort signal triggered if the user aborts the rendering.
     */
    handleFrame(canvas: HTMLCanvasElement, frame: number, sceneFrame: number, sceneName: string, signal: AbortSignal): Promise<void>;
    /**
     * after processing the image stream and generating an audio file, merge the video and audio stream as the final video
     */
    mergeMedia?(): Promise<void>;
    /**
     * Take in media assets per frame and generate audio track for the video.
     */
    generateAudio?(assetsInfo: AssetInfo[][], startFrame: number, endFrame: number): Promise<void>;
    /**
     * Download all assets necessary for the export process
     */
    downloadVideos?(assetsInfo: AssetInfo[][]): Promise<void>;
    /**
     * Finish the rendering process.
     *
     * @remarks
     * Called after rendering the visual elements has finished and audio so that audio track can be merged.
     *
     * @param result - The result of the rendering.
     */
    stop?(result: RendererResult): Promise<void>;
    /**
     * Finish the rendering process.
     *
     * @remarks
     * Guaranteed to be called after the rendering has finished - no matter the
     * result. Performs clean-up.
     *
     */
    kill?(): Promise<void>;
}
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