isobmff-inspector/src/boxes/dref.js

Simple ISOBMFF parser, compatible with JavaScript and Node.JS

export default {
  name: "Data Reference Box",
  description: "",
  container: true,

  parser(reader) {
    const version = reader.bytesToInt(1);
    const flags = reader.bytesToInt(3);
    if (version !== 0) {
      throw new Error("invalid version");
    }
    if (flags !== 0) {
      throw new Error("invalid flags");
    }

    const entry_count = reader.bytesToInt(4);

    return { version, flags, entry_count };
  },
};