lineno">  152</span>&#160;  }</div><div class="line"><a name="l00153"></a><span class="lineno">  153</span>&#160;</div><div class="line"><a name="l00154"></a><span class="lineno">  154</span>&#160;  <span class="comment">/** Calculate the next sample, given an input signal.</span></div><div class="line"><a name="l00155"></a><span class="lineno">  155</span>&#160;<span class="comment">  @param input the signal input.</span></div><div class="line"><a name="l00156"></a><span class="lineno">  156</span>&#160;<s