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<html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=ANSI_X3.4-1968" /><title>V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')</title><meta name="generator" content="DocBook XSL Stylesheets V1.75.2" /><link rel="home" href="index.html" title="LINUX MEDIA INFRASTRUCTURE API" /><link rel="up" href="ch02s05.html" title="YUV Formats" /><link rel="prev" href="re18.html" title="V4L2_PIX_FMT_NV12 ('NV12'), V4L2_PIX_FMT_NV21 ('NV21')" /><link rel="next" href="ch02s06.html" title="Compressed Formats" /></head><body><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="3" align="center">V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')</th></tr><tr><td width="20%" align="left"><a accesskey="p" href="re18.html">Prev</a> </td><th width="60%" align="center">YUV Formats</th><td width="20%" align="right"> <a accesskey="n" href="ch02s06.html">Next</a></td></tr></table><hr /></div><div class="refentry" title="V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')"><a id="id2817730"></a><div class="titlepage"></div><div class="refnamediv"><h2>Name</h2><p><code class="constant">V4L2_PIX_FMT_NV16</code>, <code class="constant">V4L2_PIX_FMT_NV61</code> — Formats with ½ horizontal
chroma resolution, also known as YUV 4:2:2. One luminance and one
chrominance plane with alternating chroma samples as opposed to
<code class="constant">V4L2_PIX_FMT_YVU420</code></p></div><div class="refsect1" title="Description"><a id="id2816686"></a><h2>Description</h2><p>These are two-plane versions of the YUV 4:2:2 format.
The three components are separated into two sub-images or planes. The
Y plane is first. The Y plane has one byte per pixel. For
<code class="constant">V4L2_PIX_FMT_NV16</code>, a combined CbCr plane
immediately follows the Y plane in memory. The CbCr plane is the same
width and height, in bytes, as the Y plane (and of the image).
Each CbCr pair belongs to two pixels. For example,
Cb<sub>0</sub>/Cr<sub>0</sub> belongs to
Y'<sub>00</sub>, Y'<sub>01</sub>.
<code class="constant">V4L2_PIX_FMT_NV61</code> is the same except the Cb and
Cr bytes are swapped, the CrCb plane starts with a Cr byte.</p><p>If the Y plane has pad bytes after each row, then the
CbCr plane has as many pad bytes after its rows.</p><div class="example"><a id="id2817776"></a><p class="title"><b>Example 2.19. <code class="constant">V4L2_PIX_FMT_NV16</code> 4 × 4
pixel image</b></p><div class="example-contents"><p title="Byte Order."><b>Byte Order. </b>Each cell is one byte.
</p><div class="informaltable"><table border="0"><colgroup><col align="left" /><col /><col /><col /><col /></colgroup><tbody valign="top"><tr><td align="left" valign="top">start + 0:</td><td align="center" valign="top">Y'<sub>00</sub></td><td align="center" valign="top">Y'<sub>01</sub></td><td align="center" valign="top">Y'<sub>02</sub></td><td align="center" valign="top">Y'<sub>03</sub></td></tr><tr><td align="left" valign="top">start + 4:</td><td align="center" valign="top">Y'<sub>10</sub></td><td align="center" valign="top">Y'<sub>11</sub></td><td align="center" valign="top">Y'<sub>12</sub></td><td align="center" valign="top">Y'<sub>13</sub></td></tr><tr><td align="left" valign="top">start + 8:</td><td align="center" valign="top">Y'<sub>20</sub></td><td align="center" valign="top">Y'<sub>21</sub></td><td align="center" valign="top">Y'<sub>22</sub></td><td align="center" valign="top">Y'<sub>23</sub></td></tr><tr><td align="left" valign="top">start + 12:</td><td align="center" valign="top">Y'<sub>30</sub></td><td align="center" valign="top">Y'<sub>31</sub></td><td align="center" valign="top">Y'<sub>32</sub></td><td align="center" valign="top">Y'<sub>33</sub></td></tr><tr><td align="left" valign="top">start + 16:</td><td align="center" valign="top">Cb<sub>00</sub></td><td align="center" valign="top">Cr<sub>00</sub></td><td align="center" valign="top">Cb<sub>01</sub></td><td align="center" valign="top">Cr<sub>01</sub></td></tr><tr><td align="left" valign="top">start + 20:</td><td align="center" valign="top">Cb<sub>10</sub></td><td align="center" valign="top">Cr<sub>10</sub></td><td align="center" valign="top">Cb<sub>11</sub></td><td align="center" valign="top">Cr<sub>11</sub></td></tr><tr><td align="left" valign="top">start + 24:</td><td align="center" valign="top">Cb<sub>20</sub></td><td align="center" valign="top">Cr<sub>20</sub></td><td align="center" valign="top">Cb<sub>21</sub></td><td align="center" valign="top">Cr<sub>21</sub></td></tr><tr><td align="left" valign="top">start + 28:</td><td align="center" valign="top">Cb<sub>30</sub></td><td align="center" valign="top">Cr<sub>30</sub></td><td align="center" valign="top">Cb<sub>31</sub></td><td align="center" valign="top">Cr<sub>31</sub></td></tr></tbody></table></div><p title="Byte Order.">
</p><p title="Color Sample Location."><b>Color Sample Location. </b>
</p><div class="informaltable"><table border="0"><colgroup><col /><col /><col /><col /><col /><col /><col /></colgroup><tbody valign="top"><tr><td align="center" valign="top"> </td><td align="center" valign="top">0</td><td align="center" valign="top"> </td><td align="center" valign="top">1</td><td align="center" valign="top"> </td><td align="center" valign="top">2</td><td align="center" valign="top"> </td><td align="center" valign="top">3</td></tr><tr><td align="center" valign="top">0</td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td></tr><tr><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td></tr><tr><td align="center" valign="top">1</td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td></tr><tr><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td></tr><tr><td align="center" valign="top"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td><td class="auto-generated"> </td></tr><tr><td align="center" valign="top">2</td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td></tr><tr><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td></tr><tr><td align="center" valign="top">3</td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td><td align="center" valign="top"> </td><td align="center" valign="top">Y</td></tr><tr><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top"> </td><td align="center" valign="top">C</td><td align="center" valign="top"> </td></tr></tbody></table></div><p title="Color Sample Location.">
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