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7<title>GetLastImageUid</title>
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9  <body>
10<h1><CODE><a href="../../../../nn/Overview.html">nn</a>::<a href="../../../../nn/jpeg/Overview.html">jpeg</a>::<a href="../../../../nn/jpeg/CTR/Overview.html">CTR</a>::<a href="../../../../nn/jpeg/CTR/JpegMpDecoder/Overview.html">JpegMpDecoder</a>::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>Parameters</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>0x00</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.<br /></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 unique ID from the EXIF IFD of the image that was either decoded or whose EXIF information was extracted immediately previous to this call.</p><p>If that processing fails, this function also fails. This function needs image data to get the information. Do not destroy the image data. 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 unique ID list for individual images, 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>
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51