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 <span id="projectnumber">2.7.1</span>
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<div class="title">AVPixFmtDescriptor Struct Reference</div> </div>
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<!-- doxytag: class="AVPixFmtDescriptor" -->
<p>Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes of an image.
<a href="structAVPixFmtDescriptor.html#details">More...</a></p>
<p><code>#include <<a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>></code></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#a10736c3f1288eb87b23ede3ffdefb435">name</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#ae83de203f97288c9f4070212a5eac5de">nb_components</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">The number of components each pixel has, (1-4) <a href="#ae83de203f97288c9f4070212a5eac5de"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#a4abca4534188ff94627e88c0d8362058">log2_chroma_w</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Amount to shift the luma width right to find the chroma width. <a href="#a4abca4534188ff94627e88c0d8362058"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#abea8ed308fe00644fc066a00018afa95">log2_chroma_h</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Amount to shift the luma height right to find the chroma height. <a href="#abea8ed308fe00644fc066a00018afa95"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#a6da04fdde7dcfd348dede45c6a68c229">flags</a></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="structAVComponentDescriptor.html">AVComponentDescriptor</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#a17569c9349766c3b5201b33f84f19a25">comp</a> [4]</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Parameters that describe how pixels are packed. <a href="#a17569c9349766c3b5201b33f84f19a25"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">const char * </td><td class="memItemRight" valign="bottom"><a class="el" href="structAVPixFmtDescriptor.html#a85163c36645d2f372a4e98b314fa964b">alias</a></td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Alternative comma-separated names. <a href="#a85163c36645d2f372a4e98b314fa964b"></a><br/></td></tr>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes of an image. </p>
<p>It also stores the subsampling factors and number of components.</p>
<dl class="note"><dt><b>Note:</b></dt><dd>This is separate of the colorspace (RGB, YCbCr, YPbPr, JPEG-style YUV and all the YUV variants) <a class="el" href="structAVPixFmtDescriptor.html" title="Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...">AVPixFmtDescriptor</a> just stores how values are stored not what these values represent. </dd></dl>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00069">69</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
</div><hr/><h2>Field Documentation</h2>
<a class="anchor" id="a10736c3f1288eb87b23ede3ffdefb435"></a><!-- doxytag: member="AVPixFmtDescriptor::name" ref="a10736c3f1288eb87b23ede3ffdefb435" args="" -->
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<td class="memname">const char* <a class="el" href="structAVPixFmtDescriptor.html#a10736c3f1288eb87b23ede3ffdefb435">AVPixFmtDescriptor::name</a></td>
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<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00070">70</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="ae83de203f97288c9f4070212a5eac5de"></a><!-- doxytag: member="AVPixFmtDescriptor::nb_components" ref="ae83de203f97288c9f4070212a5eac5de" args="" -->
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<td class="memname">uint8_t <a class="el" href="structAVPixFmtDescriptor.html#ae83de203f97288c9f4070212a5eac5de">AVPixFmtDescriptor::nb_components</a></td>
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<p>The number of components each pixel has, (1-4) </p>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00071">71</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="a4abca4534188ff94627e88c0d8362058"></a><!-- doxytag: member="AVPixFmtDescriptor::log2_chroma_w" ref="a4abca4534188ff94627e88c0d8362058" args="" -->
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<td class="memname">uint8_t <a class="el" href="structAVPixFmtDescriptor.html#a4abca4534188ff94627e88c0d8362058">AVPixFmtDescriptor::log2_chroma_w</a></td>
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<p>Amount to shift the luma width right to find the chroma width. </p>
<p>For YV12 this is 1 for example. chroma_width = -((-luma_width) >> log2_chroma_w) The note above is needed to ensure rounding up. This value only refers to the chroma components. chroma_width = -((-luma_width )>>log2_chroma_w) </p>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00080">80</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="abea8ed308fe00644fc066a00018afa95"></a><!-- doxytag: member="AVPixFmtDescriptor::log2_chroma_h" ref="abea8ed308fe00644fc066a00018afa95" args="" -->
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<td class="memname">uint8_t <a class="el" href="structAVPixFmtDescriptor.html#abea8ed308fe00644fc066a00018afa95">AVPixFmtDescriptor::log2_chroma_h</a></td>
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<p>Amount to shift the luma height right to find the chroma height. </p>
<p>For YV12 this is 1 for example. chroma_height= -((-luma_height) >> log2_chroma_h) The note above is needed to ensure rounding up. This value only refers to the chroma components. </p>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00089">89</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="a6da04fdde7dcfd348dede45c6a68c229"></a><!-- doxytag: member="AVPixFmtDescriptor::flags" ref="a6da04fdde7dcfd348dede45c6a68c229" args="" -->
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<td class="memname">uint8_t <a class="el" href="structAVPixFmtDescriptor.html#a6da04fdde7dcfd348dede45c6a68c229">AVPixFmtDescriptor::flags</a></td>
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<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00090">90</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="a17569c9349766c3b5201b33f84f19a25"></a><!-- doxytag: member="AVPixFmtDescriptor::comp" ref="a17569c9349766c3b5201b33f84f19a25" args="[4]" -->
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<td class="memname"><a class="el" href="structAVComponentDescriptor.html">AVComponentDescriptor</a> <a class="el" href="structAVPixFmtDescriptor.html#a17569c9349766c3b5201b33f84f19a25">AVPixFmtDescriptor::comp</a>[4]</td>
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<p>Parameters that describe how pixels are packed. </p>
<p>If the format has 2 or 4 components, then alpha is last. If the format has 1 or 2 components, then luma is 0. If the format has 3 or 4 components: if the RGB flag is set then 0 is red, 1 is green and 2 is blue; otherwise 0 is luma, 1 is chroma-U and 2 is chroma-V. </p>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00100">100</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<a class="anchor" id="a85163c36645d2f372a4e98b314fa964b"></a><!-- doxytag: member="AVPixFmtDescriptor::alias" ref="a85163c36645d2f372a4e98b314fa964b" args="" -->
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<td class="memname">const char* <a class="el" href="structAVPixFmtDescriptor.html#a85163c36645d2f372a4e98b314fa964b">AVPixFmtDescriptor::alias</a></td>
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<p>Alternative comma-separated names. </p>
<p>Definition at line <a class="el" href="pixdesc_8h_source.html#l00105">105</a> of file <a class="el" href="pixdesc_8h_source.html">pixdesc.h</a>.</p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>libavutil/<a class="el" href="pixdesc_8h_source.html">pixdesc.h</a></li>
</ul>
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