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/*! \page structure Structure of the decoders
<p>The PSI decoder and the specific decoder:</p>
<img src="decoder.png" />
<p>Each decoder is split into two entities:</p>
<ul>
<li>the <em>PSI decoder</em></li>
<li>the <em>specific decoder</em></li>
</ul>
<p>The reason of this split is that each PSI section has a common
format. The main task of the <em>PSI decoder</em> is to get the TS
packets given by the <em>application</em> and send complete PSI sections
to the <em>specific decoder</em>. The <em>PSI decoder</em> must be
reliable on TS discontinuities and signal them to the <em>specific
decoder</em>.</p>
<p>The task of the <em>specific decoder</em> is to get the PSI sections
given by the <em>PSI decoder</em>, to build complete tables and to send
them back to the <em>application</em>. At the same time it has to check
TS discontinuities signaled by the <em>PSI decoder</em>. </p>
<p>The <em>PSI decoder</em> is common to all the decoders wheras the
<em>specific decoder</em> must be implemented for all the PSI
tables.</p>
<ul>
<li>\ref usage</li>
<li>\ref howto-new-api</li>
</ul>
*/
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