minf_(streamInfo) {
    const Mp4Generator = shaka.util.Mp4Generator;
    const ContentType = shaka.util.ManifestParserUtils.ContentType;
    switch (streamInfo.type) {
      case ContentType.VIDEO:
        return Mp4Generator.box(
            'minf', Mp4Generator.box('vmhd', Mp4Generator.VMHD_),
            Mp4Generator.DINF_, this.stbl_(streamInfo));
      case ContentType.AUDIO:
        return Mp4Generator.box(
            'minf', Mp4Generator.box('smhd', Mp4Generator.SMHD_),
            Mp4Generator.DINF_, this.stbl_(streamInfo));
    }
    return new Uint8Array([]);
  }
Generate a MINF box

@param {shaka.util.Mp4Generator.StreamInfo} streamInfo
@return {!Uint8Array}
@private