static parseDVCC(codecBase, reader, boxName) {
    const Mp4BoxParsers = shaka.util.Mp4BoxParsers;
    reader.skip(2); // Skip "dv_version_major" and "dv_version_minor"
    const thirdByte = reader.readUint8();
    const fourthByte = reader.readUint8();
    const profile = (thirdByte >> 1) & 0x7f;
    const level = ((thirdByte << 5) & 0x20) | ((fourthByte >> 3) & 0x1f);
    const codec = codecBase + '.' +
        Mp4BoxParsers.addLeadingZero_(profile) + '.' +
        Mp4BoxParsers.addLeadingZero_(level);

    return {codec};
  }
Parses a DVCC box.
@param {string} codecBase
@param {!shaka.util.DataViewReader} reader
@param {string} boxName
@return {!shaka.util.ParsedDVCCBox}