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   &#160;<span id="projectnumber">2.7.1</span>
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<a href="#nested-classes">Data Structures</a> &#124;
<a href="#enum-members">Enumerations</a> &#124;
<a href="#func-members">Functions</a>  </div>
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<div class="title">Audio downmix metadata</div>  </div>
<div class="ingroups"><a class="el" href="group__lavu__audio.html">Audio related</a></div></div><!--header-->
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Data Structures</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">struct &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="structAVDownmixInfo.html">AVDownmixInfo</a></td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">This structure describes optional metadata relevant to a downmix procedure.  <a href="structAVDownmixInfo.html#details">More...</a><br/></td></tr>
<tr><td colspan="2"><h2><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">enum &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521">AVDownmixType</a> { <br/>
&#160;&#160;<a class="el" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a1184863af0dcd15f6851f2db10fa355c">AV_DOWNMIX_TYPE_UNKNOWN</a>, 
<a class="el" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a63e63739b6ea34a5ec073ad6ead25f8e">AV_DOWNMIX_TYPE_LORO</a>, 
<a class="el" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a3737f8fe65fe8b805b256efa8d1328ef">AV_DOWNMIX_TYPE_LTRT</a>, 
<a class="el" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ac92fde94fbc0aa50b93071d995a36fca">AV_DOWNMIX_TYPE_DPLII</a>, 
<br/>
&#160;&#160;<a class="el" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ae8e1a1a755fccdddddbc9680694af182">AV_DOWNMIX_TYPE_NB</a>
<br/>
 }</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Possible downmix types.  <a href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521">More...</a><br/></td></tr>
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Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVDownmixInfo.html">AVDownmixInfo</a> *&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group__downmix__info.html#gadedd619e3fd3bb7732b917bfafba97a8">av_downmix_info_update_side_data</a> (<a class="el" href="structAVFrame.html">AVFrame</a> *<a class="el" href="extract__mvs_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>)</td></tr>
<tr><td class="mdescLeft">&#160;</td><td class="mdescRight">Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.  <a href="#gadedd619e3fd3bb7732b917bfafba97a8"></a><br/></td></tr>
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<hr/><h2>Enumeration Type Documentation</h2>
<a class="anchor" id="ga3e3654fedbe3e5485f00ea09396c3521"></a><!-- doxytag: member="downmix_info.h::AVDownmixType" ref="ga3e3654fedbe3e5485f00ea09396c3521" args="" -->
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          <td class="memname">enum <a class="el" href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521">AVDownmixType</a></td>
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<p>Possible downmix types. </p>
<dl><dt><b>Enumerator: </b></dt><dd><table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"><em><a class="anchor" id="gga3e3654fedbe3e5485f00ea09396c3521a1184863af0dcd15f6851f2db10fa355c"></a><!-- doxytag: member="AV_DOWNMIX_TYPE_UNKNOWN" ref="gga3e3654fedbe3e5485f00ea09396c3521a1184863af0dcd15f6851f2db10fa355c" args="" -->AV_DOWNMIX_TYPE_UNKNOWN</em>&nbsp;</td><td>
<p>Not indicated. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga3e3654fedbe3e5485f00ea09396c3521a63e63739b6ea34a5ec073ad6ead25f8e"></a><!-- doxytag: member="AV_DOWNMIX_TYPE_LORO" ref="gga3e3654fedbe3e5485f00ea09396c3521a63e63739b6ea34a5ec073ad6ead25f8e" args="" -->AV_DOWNMIX_TYPE_LORO</em>&nbsp;</td><td>
<p>Lo/Ro 2-channel downmix (Stereo). </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga3e3654fedbe3e5485f00ea09396c3521a3737f8fe65fe8b805b256efa8d1328ef"></a><!-- doxytag: member="AV_DOWNMIX_TYPE_LTRT" ref="gga3e3654fedbe3e5485f00ea09396c3521a3737f8fe65fe8b805b256efa8d1328ef" args="" -->AV_DOWNMIX_TYPE_LTRT</em>&nbsp;</td><td>
<p>Lt/Rt 2-channel downmix, Dolby Surround compatible. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga3e3654fedbe3e5485f00ea09396c3521ac92fde94fbc0aa50b93071d995a36fca"></a><!-- doxytag: member="AV_DOWNMIX_TYPE_DPLII" ref="gga3e3654fedbe3e5485f00ea09396c3521ac92fde94fbc0aa50b93071d995a36fca" args="" -->AV_DOWNMIX_TYPE_DPLII</em>&nbsp;</td><td>
<p>Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible. </p>
</td></tr>
<tr><td valign="top"><em><a class="anchor" id="gga3e3654fedbe3e5485f00ea09396c3521ae8e1a1a755fccdddddbc9680694af182"></a><!-- doxytag: member="AV_DOWNMIX_TYPE_NB" ref="gga3e3654fedbe3e5485f00ea09396c3521ae8e1a1a755fccdddddbc9680694af182" args="" -->AV_DOWNMIX_TYPE_NB</em>&nbsp;</td><td>
<p>Number of downmix types. </p>
<p>Not part of ABI. </p>
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<p>Definition at line <a class="el" href="downmix__info_8h_source.html#l00044">44</a> of file <a class="el" href="downmix__info_8h_source.html">downmix_info.h</a>.</p>

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<hr/><h2>Function Documentation</h2>
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          <td class="memname"><a class="el" href="structAVDownmixInfo.html">AVDownmixInfo</a>* <a class="el" href="group__downmix__info.html#gadedd619e3fd3bb7732b917bfafba97a8">av_downmix_info_update_side_data</a> </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="structAVFrame.html">AVFrame</a> *&#160;</td>
          <td class="paramname"><em>frame</em></td><td>)</td>
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<p>Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing. </p>
<p>If the side data is absent, it is created and added to the frame.</p>
<dl class="params"><dt><b>Parameters:</b></dt><dd>
  <table class="params">
    <tr><td class="paramname">frame</td><td>the frame for which the side data is to be obtained or created</td></tr>
  </table>
  </dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>the <a class="el" href="structAVDownmixInfo.html" title="This structure describes optional metadata relevant to a downmix procedure.">AVDownmixInfo</a> structure to be edited by the caller, or NULL if the structure cannot be allocated. </dd></dl>

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