ptions of <a href="API-notes.html#errors">this convention</a>
      and <a href="#callbacks">LibRaw behavior in cases of fatal errors</a>.</p>
    <p><a name="dataload"></a></p>
    <h2>Methods Loading Data from a File</h2>
    <p><a name="open_datastream"></a></p>
    <h3>int LibRaw::open_datastream(LibRaw_abstract_datastream *stream)</h3>
    <p>Opens a datastream with RAW data, reads metadata (EXIF) from it, and
      fills the following structures:</p>
    <ul>
      <li>imgdata.idata (<a href="API-data