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<div class="header">
  <div class="summary">
<a href="#pub-attribs">Data Fields</a>  </div>
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<div class="title">AVDCT Struct Reference</div>  </div>
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<p><a class="el" href="structAVDCT.html" title="AVDCT context. ">AVDCT</a> context.  
 <a href="structAVDCT.html#details">More...</a></p>

<p><code>#include &lt;<a class="el" href="avdct_8h_source.html">libavcodec/avdct.h</a>&gt;</code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr class="memitem:a9cf1dfc2c85db6bf753182259116cba1"><td class="memItemLeft" align="right" valign="top">const <a class="el" href="structAVClass.html">AVClass</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#a9cf1dfc2c85db6bf753182259116cba1">av_class</a></td></tr>
<tr class="separator:a9cf1dfc2c85db6bf753182259116cba1"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a7bcd6a2bcf9d82e6305528a585485e90"><td class="memItemLeft" align="right" valign="top">void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#a7bcd6a2bcf9d82e6305528a585485e90">idct</a> )(int16_t *block)</td></tr>
<tr class="separator:a7bcd6a2bcf9d82e6305528a585485e90"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a0ec74ead791a02aa244ade41f1200f1e"><td class="memItemLeft" align="right" valign="top">uint8_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#a0ec74ead791a02aa244ade41f1200f1e">idct_permutation</a> [64]</td></tr>
<tr class="memdesc:a0ec74ead791a02aa244ade41f1200f1e"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDCT input permutation.  <a href="#a0ec74ead791a02aa244ade41f1200f1e">More...</a><br /></td></tr>
<tr class="separator:a0ec74ead791a02aa244ade41f1200f1e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac1068527f1f37bbe27d31be724f2c4d4"><td class="memItemLeft" align="right" valign="top">void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#ac1068527f1f37bbe27d31be724f2c4d4">fdct</a> )(int16_t *block)</td></tr>
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<tr class="memitem:afafee61c2c4c3cafd7a1433de9677be5"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#afafee61c2c4c3cafd7a1433de9677be5">dct_algo</a></td></tr>
<tr class="memdesc:afafee61c2c4c3cafd7a1433de9677be5"><td class="mdescLeft">&#160;</td><td class="mdescRight">DCT algorithm.  <a href="#afafee61c2c4c3cafd7a1433de9677be5">More...</a><br /></td></tr>
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<tr class="memitem:aed94b220afff7a9cec826c6347d7e859"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#aed94b220afff7a9cec826c6347d7e859">idct_algo</a></td></tr>
<tr class="memdesc:aed94b220afff7a9cec826c6347d7e859"><td class="mdescLeft">&#160;</td><td class="mdescRight">IDCT algorithm.  <a href="#aed94b220afff7a9cec826c6347d7e859">More...</a><br /></td></tr>
<tr class="separator:aed94b220afff7a9cec826c6347d7e859"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a28cd1e0bb3528d9451851dd105b4f10d"><td class="memItemLeft" align="right" valign="top">void(*&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#a28cd1e0bb3528d9451851dd105b4f10d">get_pixels</a> )(int16_t *block, const uint8_t *pixels, ptrdiff_t line_size)</td></tr>
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<tr class="memitem:aa81e0ecf9185352726fa6b5ab5bbcabf"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDCT.html#aa81e0ecf9185352726fa6b5ab5bbcabf">bits_per_sample</a></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p><a class="el" href="structAVDCT.html" title="AVDCT context. ">AVDCT</a> context. </p>
<dl class="section note"><dt>Note</dt><dd>function pointers can be NULL if the specific features have been disabled at build time. </dd></dl>

<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00029">29</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>
</div><h2 class="groupheader">Field Documentation</h2>
<a id="a9cf1dfc2c85db6bf753182259116cba1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a9cf1dfc2c85db6bf753182259116cba1">&#9670;&nbsp;</a></span>av_class</h2>

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          <td class="memname">const <a class="el" href="structAVClass.html">AVClass</a>* AVDCT::av_class</td>
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<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00030">30</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a7bcd6a2bcf9d82e6305528a585485e90">&#9670;&nbsp;</a></span>idct</h2>

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          <td class="memname">void(* AVDCT::idct) (int16_t *block)</td>
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<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00032">32</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a0ec74ead791a02aa244ade41f1200f1e">&#9670;&nbsp;</a></span>idct_permutation</h2>

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<p>IDCT input permutation. </p>
<p>Several optimized IDCTs need a permutated input (relative to the normal order of the reference IDCT). This permutation must be performed before the idct_put/add. Note, normally this can be merged with the zigzag/alternate scan<br />
 An example to avoid confusion:</p><ul>
<li>(-&gt;decode coeffs -&gt; zigzag reorder -&gt; dequant -&gt; reference IDCT -&gt; ...)</li>
<li>(x -&gt; reference DCT -&gt; reference IDCT -&gt; x)</li>
<li>(x -&gt; reference DCT -&gt; simple_mmx_perm = idct_permutation -&gt; simple_idct_mmx -&gt; x)</li>
<li>(-&gt; decode coeffs -&gt; zigzag reorder -&gt; simple_mmx_perm -&gt; dequant -&gt; simple_idct_mmx -&gt; ...) </li>
</ul>

<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00048">48</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#ac1068527f1f37bbe27d31be724f2c4d4">&#9670;&nbsp;</a></span>fdct</h2>

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          <td class="memname">void(* AVDCT::fdct) (int16_t *block)</td>
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<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00050">50</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#afafee61c2c4c3cafd7a1433de9677be5">&#9670;&nbsp;</a></span>dct_algo</h2>

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<p>DCT algorithm. </p>
<p>must use AVOptions to set this field. </p>

<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00057">57</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aed94b220afff7a9cec826c6347d7e859">&#9670;&nbsp;</a></span>idct_algo</h2>

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<p>IDCT algorithm. </p>
<p>must use AVOptions to set this field. </p>

<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00063">63</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#a28cd1e0bb3528d9451851dd105b4f10d">&#9670;&nbsp;</a></span>get_pixels</h2>

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          <td class="memname">void(* AVDCT::get_pixels) (int16_t *block, const uint8_t *pixels, ptrdiff_t line_size)</td>
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<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00065">65</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<h2 class="memtitle"><span class="permalink"><a href="#aa81e0ecf9185352726fa6b5ab5bbcabf">&#9670;&nbsp;</a></span>bits_per_sample</h2>

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<p class="definition">Definition at line <a class="el" href="avdct_8h_source.html#l00069">69</a> of file <a class="el" href="avdct_8h_source.html">avdct.h</a>.</p>

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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>libavcodec/<a class="el" href="avdct_8h_source.html">avdct.h</a></li>
</ul>
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