1<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2<html xml:lang="en-US" lang="en-US" xmlns="http://www.w3.org/1999/xhtml">
3  <head>
4    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
5    <meta http-equiv="Content-Style-Type" content="text/css" />
6    <link rel="stylesheet" href="../../../../css/manpage.css" type="text/css" />
7<title>GetLastImageUid</title>
8  </head>
9  <body>
10<h1><CODE>nn::jpeg::CTR::JpegMpDecoder::GetLastImageUid</CODE> Member Function</h1>
11<h2>Syntax</h2>
12    <div class="section">
13      <pre class="definition">#include &lt;nn/jpeg.h&gt;
14
15size_t GetLastImageUid(
16     char * pBuffer
17);
18</pre>
19    </div>
20<h2>Arguments</h2>
21    <div class="section">
22      <table class="arguments">
23        <thead>
24          <tr>
25            <td width="15" />
26<th>Name</th>
27<td>Description</td>
28          </tr>
29        </thead>
30        <tr>
31<td>out</td>
32<th>pBuffer</th>
33<td>Buffer storing the unique image ID.<br />The ID is a 128-bit integer value represented as a 32-character hexadecimal ASCII string. When the terminating <CODE>&quot;</CODE> character is included, this value has a byte length of <a href="../../../../nn/jpeg/CTR/IMAGE_UID_SIZE.html"><CODE>IMAGE_UID_SIZE</CODE></a> (33) bytes.</td>
34        </tr> </table>
35    </div>
36<h2>Return Values</h2>
37<div class="section">Returns <a href="../../../../nn/jpeg/CTR/IMAGE_UID_SIZE.html"><CODE>IMAGE_UID_SIZE</CODE></a> (33) on success. Returns <CODE>0</CODE> on failure. </div>
38<h2>Description</h2>
39    <div class="section">
40<p>Gets the EXIF IFD unique image ID of the image that was either decoded or whose EXIF information was extracted immediately previous to this call.</p><p>If that previous operation failed, this function also fails. This function needs the image data to get the information.  So do not destroy the image data.<br />This information is the information registered in the EXIF IFD's <CODE>ImageUniqueID</CODE> tag.</p><p>Use the <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpImageUidListOffset.html">GetMpImageUidListOffset</a></CODE> and <CODE><a href="../../../../nn/jpeg/CTR/JpegMpDecoder/GetMpImageUidListSize.html">GetMpImageUidListSize</a></CODE> functions to get the list of individual image unique IDs, which is included in the MP index IFD.</p><!-- write here --></div>
41<h2>Revision History</h2>
42    <div class="section">
43      <dl class="history">
44        <dt>2010/06/14</dt>
45<dd>Initial version.<br />
46        </dd>
47      </dl>
48    </div>
49  <hr><p>CONFIDENTIAL</p></body>
50</html>