# CSJ2K.j2k.codestream.reader.BitstreamReaderAgent.getCodeBlock

## Content

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<h1 id="CSJ2K_j2k_codestream_reader_BitstreamReaderAgent_getCodeBlock_" data-uid="CSJ2K.j2k.codestream.reader.BitstreamReaderAgent.getCodeBlock*">getCodeBlock Method
</h1>
<div class="markdown level0 summary"></div>
<div class="markdown level0 conceptual"></div>



<a id="CSJ2K_j2k_codestream_reader_BitstreamReaderAgent_getCodeBlock_" data-uid="CSJ2K.j2k.codestream.reader.BitstreamReaderAgent.getCodeBlock*"></a>
<h4 id="CSJ2K_j2k_codestream_reader_BitstreamReaderAgent_getCodeBlock_System_Int32_System_Int32_System_Int32_CSJ2K_j2k_wavelet_synthesis_SubbandSyn_System_Int32_System_Int32_CSJ2K_j2k_entropy_decoder_DecLyrdCBlk_" data-uid="CSJ2K.j2k.codestream.reader.BitstreamReaderAgent.getCodeBlock(System.Int32,System.Int32,System.Int32,CSJ2K.j2k.wavelet.synthesis.SubbandSyn,System.Int32,System.Int32,CSJ2K.j2k.entropy.decoder.DecLyrdCBlk)">getCodeBlock(int, int, int, SubbandSyn, int, int, DecLyrdCBlk)</h4>
<div class="markdown level1 summary"><p>Returns the specified coded code-block, for the specified component, in
the current tile. The first layer to return is indicated by 'fl'. The
number of layers that is returned depends on 'nl' and the amount of
data available.</p>
<pre><code>       &lt;p&gt;The argument 'fl' is to be used by subsequent calls to this method
       for the same code-block. In this way supplamental data can be retrieved
       at a later time. The fact that data from more than one layer can be
       returned means that several packets from the same code-block, of the
       same component, and the same tile, have been concatenated.&lt;/p&gt;

       &lt;p&gt;The returned compressed code-block can have its progressive
       attribute set. If this attribute is set it means that more data can be
       obtained by subsequent calls to this method (subject to transmission
       delays, etc). If the progressive attribute is not set it means that the
       returned data is all the data that can be obtained for the specified
       subblock.&lt;/p&gt;

       &lt;p&gt;The compressed code-block is uniquely specified by the current tile,
       the component (identified by 'c'), the subband (indentified by 'sb')
       and the code-bock vertical and horizontal indexes 'm' and 'n'.&lt;/p&gt;

       &lt;p&gt;The 'ulx' and 'uly' members of the returned 'DecLyrdCBlk' object
       contain the coordinates of the top-left corner of the block, with
       respect to the tile, not the subband.&lt;/p&gt;
</code></pre>
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<div class="markdown level1 conceptual"></div>
<h5 class="declaration">Declaration</h5>
<div class="codewrapper">
  <pre><code class="lang-csharp hljs">public abstract DecLyrdCBlk getCodeBlock(int param1, int param2, int param3, SubbandSyn param4, int param5, int param6, DecLyrdCBlk param7)</code></pre>
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<div class="codewrapper">
  <pre><code class="lang-vbnet hljs">Public MustOverride Function getCodeBlock(param1 As Integer, param2 As Integer, param3 As Integer, param4 As SubbandSyn, param5 As Integer, param6 As Integer, param7 As DecLyrdCBlk) As DecLyrdCBlk</code></pre>
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<h5 class="parameters">Parameters</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Name</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">param1</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">param2</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">param3</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="CSJ2K.j2k.wavelet.synthesis.SubbandSyn.html">SubbandSyn</a></td>
      <td><span class="parametername">param4</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">param5</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="https://learn.microsoft.com/dotnet/api/system.int32">int</a></td>
      <td><span class="parametername">param6</span></td>
      <td></td>
    </tr>
    <tr>
      <td><a class="xref" href="CSJ2K.j2k.entropy.decoder.DecLyrdCBlk.html">DecLyrdCBlk</a></td>
      <td><span class="parametername">param7</span></td>
      <td></td>
    </tr>
  </tbody>
</table>
<h5 class="returns">Returns</h5>
<table class="table table-bordered table-condensed">
  <thead>
    <tr>
      <th>Type</th>
      <th>Description</th>
    </tr>
  </thead>
  <tbody>
    <tr>
      <td><a class="xref" href="CSJ2K.j2k.entropy.decoder.DecLyrdCBlk.html">DecLyrdCBlk</a></td>
      <td><p>The compressed code-block, with a certain number of layers
determined by the available data and 'nl'.</p>
</td>
    </tr>
  </tbody>
</table>
<h5 class="implements">Implements</h5>
    <div><a class="xref" href="CSJ2K.j2k.entropy.decoder.CodedCBlkDataSrcDec.getCodeBlock.html#CSJ2K_j2k_entropy_decoder_CodedCBlkDataSrcDec_getCodeBlock_System_Int32_System_Int32_System_Int32_CSJ2K_j2k_wavelet_synthesis_SubbandSyn_System_Int32_System_Int32_CSJ2K_j2k_entropy_decoder_DecLyrdCBlk_">CodedCBlkDataSrcDec.getCodeBlock(int, int, int, SubbandSyn, int, int, DecLyrdCBlk)</a></div>
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