Based on kernel version 4.7.2. Page generated on 2016-08-22 22:45 EST.
1 <refentry> 2 <refmeta> 3 <refentrytitle>V4L2_PIX_FMT_NV16 ('NV16'), V4L2_PIX_FMT_NV61 ('NV61')</refentrytitle> 4 &manvol; 5 </refmeta> 6 <refnamediv> 7 <refname id="V4L2-PIX-FMT-NV16"><constant>V4L2_PIX_FMT_NV16</constant></refname> 8 <refname id="V4L2-PIX-FMT-NV61"><constant>V4L2_PIX_FMT_NV61</constant></refname> 9 <refpurpose>Formats with ½ horizontal 10 chroma resolution, also known as YUV 4:2:2. One luminance and one 11 chrominance plane with alternating chroma samples as opposed to 12 <constant>V4L2_PIX_FMT_YVU420</constant></refpurpose> 13 </refnamediv> 14 <refsect1> 15 <title>Description</title> 16 17 <para>These are two-plane versions of the YUV 4:2:2 format. 18 The three components are separated into two sub-images or planes. The 19 Y plane is first. The Y plane has one byte per pixel. For 20 <constant>V4L2_PIX_FMT_NV16</constant>, a combined CbCr plane 21 immediately follows the Y plane in memory. The CbCr plane is the same 22 width and height, in bytes, as the Y plane (and of the image). 23 Each CbCr pair belongs to two pixels. For example, 24 Cb<subscript>0</subscript>/Cr<subscript>0</subscript> belongs to 25 Y'<subscript>00</subscript>, Y'<subscript>01</subscript>. 26 <constant>V4L2_PIX_FMT_NV61</constant> is the same except the Cb and 27 Cr bytes are swapped, the CrCb plane starts with a Cr byte.</para> 28 29 <para>If the Y plane has pad bytes after each row, then the 30 CbCr plane has as many pad bytes after its rows.</para> 31 32 <example> 33 <title><constant>V4L2_PIX_FMT_NV16</constant> 4 × 4 34 pixel image</title> 35 36 <formalpara> 37 <title>Byte Order.</title> 38 <para>Each cell is one byte. 39 <informaltable frame="none"> 40 <tgroup cols="5" align="center"> 41 <colspec align="left" colwidth="2*" /> 42 <tbody valign="top"> 43 <row> 44 <entry>start + 0:</entry> 45 <entry>Y'<subscript>00</subscript></entry> 46 <entry>Y'<subscript>01</subscript></entry> 47 <entry>Y'<subscript>02</subscript></entry> 48 <entry>Y'<subscript>03</subscript></entry> 49 </row> 50 <row> 51 <entry>start + 4:</entry> 52 <entry>Y'<subscript>10</subscript></entry> 53 <entry>Y'<subscript>11</subscript></entry> 54 <entry>Y'<subscript>12</subscript></entry> 55 <entry>Y'<subscript>13</subscript></entry> 56 </row> 57 <row> 58 <entry>start + 8:</entry> 59 <entry>Y'<subscript>20</subscript></entry> 60 <entry>Y'<subscript>21</subscript></entry> 61 <entry>Y'<subscript>22</subscript></entry> 62 <entry>Y'<subscript>23</subscript></entry> 63 </row> 64 <row> 65 <entry>start + 12:</entry> 66 <entry>Y'<subscript>30</subscript></entry> 67 <entry>Y'<subscript>31</subscript></entry> 68 <entry>Y'<subscript>32</subscript></entry> 69 <entry>Y'<subscript>33</subscript></entry> 70 </row> 71 <row> 72 <entry>start + 16:</entry> 73 <entry>Cb<subscript>00</subscript></entry> 74 <entry>Cr<subscript>00</subscript></entry> 75 <entry>Cb<subscript>01</subscript></entry> 76 <entry>Cr<subscript>01</subscript></entry> 77 </row> 78 <row> 79 <entry>start + 20:</entry> 80 <entry>Cb<subscript>10</subscript></entry> 81 <entry>Cr<subscript>10</subscript></entry> 82 <entry>Cb<subscript>11</subscript></entry> 83 <entry>Cr<subscript>11</subscript></entry> 84 </row> 85 <row> 86 <entry>start + 24:</entry> 87 <entry>Cb<subscript>20</subscript></entry> 88 <entry>Cr<subscript>20</subscript></entry> 89 <entry>Cb<subscript>21</subscript></entry> 90 <entry>Cr<subscript>21</subscript></entry> 91 </row> 92 <row> 93 <entry>start + 28:</entry> 94 <entry>Cb<subscript>30</subscript></entry> 95 <entry>Cr<subscript>30</subscript></entry> 96 <entry>Cb<subscript>31</subscript></entry> 97 <entry>Cr<subscript>31</subscript></entry> 98 </row> 99 </tbody> 100 </tgroup> 101 </informaltable> 102 </para> 103 </formalpara> 104 105 <formalpara> 106 <title>Color Sample Location.</title> 107 <para> 108 <informaltable frame="none"> 109 <tgroup cols="7" align="center"> 110 <tbody valign="top"> 111 <row> 112 <entry></entry> 113 <entry>0</entry><entry></entry><entry>1</entry><entry></entry> 114 <entry>2</entry><entry></entry><entry>3</entry> 115 </row> 116 <row> 117 <entry>0</entry> 118 <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> 119 <entry>Y</entry><entry></entry><entry>Y</entry> 120 </row> 121 <row> 122 <entry></entry> 123 <entry></entry><entry>C</entry><entry></entry><entry></entry> 124 <entry></entry><entry>C</entry><entry></entry> 125 </row> 126 <row> 127 <entry>1</entry> 128 <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> 129 <entry>Y</entry><entry></entry><entry>Y</entry> 130 </row> 131 <row> 132 <entry></entry> 133 <entry></entry><entry>C</entry><entry></entry><entry></entry> 134 <entry></entry><entry>C</entry><entry></entry> 135 </row> 136 <row> 137 <entry></entry> 138 </row> 139 <row> 140 <entry>2</entry> 141 <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> 142 <entry>Y</entry><entry></entry><entry>Y</entry> 143 </row> 144 <row> 145 <entry></entry> 146 <entry></entry><entry>C</entry><entry></entry><entry></entry> 147 <entry></entry><entry>C</entry><entry></entry> 148 </row> 149 <row> 150 <entry>3</entry> 151 <entry>Y</entry><entry></entry><entry>Y</entry><entry></entry> 152 <entry>Y</entry><entry></entry><entry>Y</entry> 153 </row> 154 <row> 155 <entry></entry> 156 <entry></entry><entry>C</entry><entry></entry><entry></entry> 157 <entry></entry><entry>C</entry><entry></entry> 158 </row> 159 </tbody> 160 </tgroup> 161 </informaltable> 162 </para> 163 </formalpara> 164 </example> 165 </refsect1> 166 </refentry>
