documentation/code_VALSignal.signal_delay.html

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  20 <code class="code"><span class="keyword">let</span>&nbsp;signal_delay&nbsp;s1&nbsp;s2&nbsp;=&nbsp;<br>
  21 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">let</span>&nbsp;s1_mem&nbsp;=&nbsp;factory_add_memory&nbsp;(signal_fun&nbsp;s1)&nbsp;<br>
  22 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(signal_macro_to_int&nbsp;<span class="constructor">Delay_Memory_Length_int</span>)&nbsp;<span class="keyword">in</span><br>
  23 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">let</span>&nbsp;new_signal&nbsp;=&nbsp;<span class="keyword">fun</span>&nbsp;t&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<br>
  24 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">let</span>&nbsp;delay&nbsp;=&nbsp;(signal_fun&nbsp;s2)&nbsp;t&nbsp;<span class="keyword">in</span><br>
  25 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">match</span>&nbsp;delay&nbsp;<span class="keyword">with</span><br>
  26 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span><span class="constructor">N</span>&nbsp;i&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span>&nbsp;i&nbsp;&lt;&nbsp;0&nbsp;<span class="keyword">then</span>&nbsp;raise&nbsp;(<span class="constructor">Signal_operation</span>&nbsp;<span class="string">"Delay&nbsp;time&nbsp;&lt;&nbsp;0."</span>)&nbsp;<br>
  27 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">else</span>&nbsp;<span class="keyword">if</span>&nbsp;(t&nbsp;-&nbsp;i)&nbsp;&gt;=&nbsp;0&nbsp;<span class="keyword">then</span>&nbsp;s1_mem&nbsp;(t&nbsp;-&nbsp;i)&nbsp;<br>
  28 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">else</span>&nbsp;v_zero&nbsp;(s1_mem&nbsp;0)<br>
  29 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span><span class="constructor">R</span>&nbsp;f&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;<span class="keyword">let</span>&nbsp;i&nbsp;=&nbsp;int_of_float&nbsp;f&nbsp;<span class="keyword">in</span><br>
  30 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">if</span>&nbsp;i&nbsp;&lt;&nbsp;0&nbsp;<span class="keyword">then</span>&nbsp;raise&nbsp;(<span class="constructor">Signal_operation</span>&nbsp;<span class="string">"Delay&nbsp;time&nbsp;&lt;&nbsp;0."</span>)&nbsp;<br>
  31 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">else</span>&nbsp;<span class="keyword">if</span>&nbsp;(t&nbsp;-&nbsp;i)&nbsp;&gt;=&nbsp;0&nbsp;<span class="keyword">then</span>&nbsp;s1_mem&nbsp;(t&nbsp;-&nbsp;i)&nbsp;<br>
  32 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">else</span>&nbsp;v_zero&nbsp;(s1_mem&nbsp;0)<br>
  33 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span><span class="constructor">Vec</span>&nbsp;(size,&nbsp;vec)&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;raise&nbsp;(<span class="constructor">Signal_operation</span>&nbsp;<span class="string">"Delay&nbsp;time&nbsp;can&nbsp;not&nbsp;be&nbsp;a&nbsp;vector."</span>)<br>
  34 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span><span class="constructor">Zero</span>&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;s1_mem&nbsp;t<br>
  35 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keywordsign">|</span><span class="constructor">W</span>&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;raise&nbsp;(<span class="constructor">Signal_operation</span>&nbsp;<span class="string">"Delay&nbsp;time&nbsp;error."</span>)<br>
  36 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span class="keyword">in</span><br>
  37 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(frequency&nbsp;s1,&nbsp;new_signal)</code></body></html>