@omnimedia/omnitool/x/timeline/sugar/o.js

open source video processing tools

import { MapG } from "@e280/stz";
import { Effect, Kind } from "../parts/item.js";
export class O {
    #nextId = 0;
    #items = new MapG();
    #getId() {
        return this.#nextId++;
    }
    register(item) {
        if (!this.#items.has(item.id))
            this.#items.set(item.id, item);
        return item.id;
    }
    get items() {
        return [...this.#items.values()];
    }
    sequence = (...items) => ({
        id: this.#getId(),
        kind: Kind.Sequence,
        children: items.map(item => this.register(item)),
    });
    stack = (...items) => ({
        id: this.#getId(),
        kind: Kind.Stack,
        children: items.map(item => this.register(item)),
    });
    clip = (media, start, duration) => ({
        id: this.#getId(),
        kind: Kind.Clip,
        mediaHash: media.datafile.checksum.hash,
        start: start ?? 0,
        duration: duration ?? media.duration,
    });
    text = (content) => ({
        id: this.#getId(),
        kind: Kind.Text,
        content,
    });
    transition = {
        crossfade: (duration) => ({
            id: this.#getId(),
            kind: Kind.Transition,
            effect: Effect.Crossfade,
            duration,
        }),
    };
}
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