eam - file
                  input interface</a></li>
              <li><a href="#bigfile_datastream">class LibRaw_file_datastream -
                  file input interface for large files</a></li>
              <li><a href="#buffer_datastream">class LibRaw_buffer_datastream -
                  input from memory buffer</a></li>
            </ul>
          </li>
          <li><a href="#own_datastreams">Own datastream derived classes</a>
            <ul>
              <li><a href="#substream">substream field: 