e="l00122"></a><span class="lineno">  122</span>&#160;  <span class="keyword">volatile</span> <a class="code" href="group__fixmath.html#ga3e1cab88474edfa08535402573125cae">Q15n16</a> f;</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;</div><div class="line"><a name="l00124"></a><span class="lineno">  124</span>&#160;  <span class="comment">/** Calculate the next sample, given an input signal.</span></div><div class="line"><a name="l00125"></a><span class="lineno">  125</sp