@svta/common-media-library/dist/iso/bmff/parsers/tkhd.js

A common library for media playback in JavaScript

import { TEMPLATE } from '../fields/TEMPLATE.js';
import { UINT } from '../fields/UINT.js';
/**
 * Parse a TrackHeaderBox from an IsoView
 *
 * @param view - The IsoView to read data from
 *
 * @returns A parsed TrackHeaderBox
 *
 * @group ISOBMFF
 *
 * @beta
 */
export function tkhd(view) {
    const { version, flags } = view.readFullBox();
    const size = version === 1 ? 8 : 4;
    return {
        version,
        flags,
        creationTime: view.readUint(size),
        modificationTime: view.readUint(size),
        trackId: view.readUint(4),
        reserved1: view.readUint(4),
        duration: view.readUint(size),
        reserved2: view.readArray(UINT, 4, 2),
        layer: view.readUint(2),
        alternateGroup: view.readUint(2),
        volume: view.readTemplate(2),
        reserved3: view.readUint(2),
        matrix: view.readArray(TEMPLATE, 4, 9),
        width: view.readTemplate(4),
        height: view.readTemplate(4),
    };
}
;
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