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

A common library for media playback in JavaScript

/**
 * Parse a MediaHeaderBox from an IsoView
 *
 * @param view - The IsoView to read data from
 *
 * @returns A parsed MediaHeaderBox
 *
 * @group ISOBMFF
 *
 * @beta
 */
export function mdhd(view) {
    const { version, flags } = view.readFullBox();
    const creationTime = view.readUint(version == 1 ? 8 : 4);
    const modificationTime = view.readUint(version == 1 ? 8 : 4);
    const timescale = view.readUint(4);
    const duration = view.readUint(version == 1 ? 8 : 4);
    const lang = view.readUint(2);
    const language = String.fromCharCode(((lang >> 10) & 0x1F) + 0x60, ((lang >> 5) & 0x1F) + 0x60, (lang & 0x1F) + 0x60);
    const preDefined = view.readUint(2);
    return {
        version,
        flags,
        creationTime,
        modificationTime,
        timescale,
        duration,
        language,
        preDefined,
    };
}
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