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50<title>nn::snd::CTR::AdpcmContext</title>
51  </head>
52  <body>
53<h1><CODE>nn::snd::CTR::AdpcmContext</CODE> Structure</h1>
54<h2>Syntax</h2>
55    <div class="section">
56      <pre class="definition">struct AdpcmContext
57{
58   u16 pred_scale;
59   s16 yn1;
60   s16 yn2;
61};
62</pre>
63    </div>
64<h2>Description</h2>
65    <div class="section">
66<p>A structure that stores an ADPCM context.</p><!-- write here --></div>
67    <a name="variable" id="variable">
68<h2>Member Variables</h2>
69      <div class="section">
70        <table class="members">
71          <tr>
72            <td width="100"> </td>
73            <th>
74<span class="argument">pred_scale</span>
75            </th>
76<td>Stores the (4-bit) predicted and (4-bit) scale ADPCM values. The upper 8 bits are not accessed.</td>
77          </tr>
78          <tr>
79            <td width="100"> </td>
80            <th>
81<span class="argument">yn1</span>
82            </th>
83<td>Past data (the previous sample).</td>
84          </tr>
85          <tr>
86            <td width="100"> </td>
87            <th>
88<span class="argument">yn2</span>
89            </th>
90<td>Past data (the sample before the previous sample).</td>
91          </tr> </table>
92      </div>
93    </a>
94<h2>Revision History</h2>
95    <div class="section">
96      <dl class="history">
97        <dt>2010/02/02</dt>
98<dd>Initial version.<br />
99        </dd>
100      </dl>
101    </div>
102  <hr><p>CONFIDENTIAL</p></body>
103</html>