@isomp4/box-moof/dist/mfhd.js

Implements encoding and decoding of the moof box type

import { FullBoxEncoding } from "@isomp4/core";
class MovieFragmentHeaderBoxEncoding extends FullBoxEncoding {
    constructor() {
        super("mfhd");
    }
    encodingLength(obj) {
        return super.encodingLength(obj); // TODO implement
    }
    encodeTo(obj, buffer) {
        const requiredBytes = super.encodeTo(obj, buffer);
        if (requiredBytes > 0) {
            return requiredBytes;
        }
        // let offset = this.encodedBytes;
        // // TODO implementing encoding
        // this.encodedBytes = offset;
        return 0;
    }
    decode(buffer, header) {
        const superBox = super.decode(buffer, header);
        if (typeof superBox === "number") {
            return superBox;
        }
        let offset = this.decodedBytes;
        if (buffer.length < offset + 4) {
            return offset + 4;
        }
        const sequenceNumber = buffer.readUInt32BE(offset);
        offset += 4;
        this.decodedBytes = offset;
        return {
            ...superBox,
            sequenceNumber,
        };
    }
}
export const mfhd = new MovieFragmentHeaderBoxEncoding();