1.. Permission is granted to copy, distribute and/or modify this 2.. document under the terms of the GNU Free Documentation License, 3.. Version 1.1 or any later version published by the Free Software 4.. Foundation, with no Invariant Sections, no Front-Cover Texts 5.. and no Back-Cover Texts. A copy of the license is included at 6.. Documentation/media/uapi/fdl-appendix.rst. 7.. 8.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections 9 10.. _V4L2-PIX-FMT-YUV422M: 11.. _v4l2-pix-fmt-yvu422m: 12 13************************************************************ 14V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61') 15************************************************************ 16 17 18V4L2_PIX_FMT_YVU422M 19Planar formats with ½ horizontal resolution, also known as YUV and YVU 204:2:2 21 22 23Description 24=========== 25 26This is a multi-planar format, as opposed to a packed format. The three 27components are separated into three sub-images or planes. 28 29The Y plane is first. The Y plane has one byte per pixel. For 30``V4L2_PIX_FMT_YUV422M`` the Cb data constitutes the second plane which 31is half the width of the Y plane (and of the image). Each Cb belongs to 32two pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, 33Y'\ :sub:`01`. The Cr data, just like the Cb plane, is in the third 34plane. 35 36``V4L2_PIX_FMT_YVU422M`` is the same except the Cr data is stored in the 37second plane and the Cb data in the third plane. 38 39If the Y plane has pad bytes after each row, then the Cb and Cr planes 40have half as many pad bytes after their rows. In other words, two Cx 41rows (including padding) is exactly as long as one Y row (including 42padding). 43 44``V4L2_PIX_FMT_YUV422M`` and ``V4L2_PIX_FMT_YVU422M`` are intended to be 45used only in drivers and applications that support the multi-planar API, 46described in :ref:`planar-apis`. 47 48**Byte Order.** 49Each cell is one byte. 50 51 52 53 54.. flat-table:: 55 :header-rows: 0 56 :stub-columns: 0 57 58 * - start0 + 0: 59 - Y'\ :sub:`00` 60 - Y'\ :sub:`01` 61 - Y'\ :sub:`02` 62 - Y'\ :sub:`03` 63 * - start0 + 4: 64 - Y'\ :sub:`10` 65 - Y'\ :sub:`11` 66 - Y'\ :sub:`12` 67 - Y'\ :sub:`13` 68 * - start0 + 8: 69 - Y'\ :sub:`20` 70 - Y'\ :sub:`21` 71 - Y'\ :sub:`22` 72 - Y'\ :sub:`23` 73 * - start0 + 12: 74 - Y'\ :sub:`30` 75 - Y'\ :sub:`31` 76 - Y'\ :sub:`32` 77 - Y'\ :sub:`33` 78 * - 79 * - start1 + 0: 80 - Cb\ :sub:`00` 81 - Cb\ :sub:`01` 82 * - start1 + 2: 83 - Cb\ :sub:`10` 84 - Cb\ :sub:`11` 85 * - start1 + 4: 86 - Cb\ :sub:`20` 87 - Cb\ :sub:`21` 88 * - start1 + 6: 89 - Cb\ :sub:`30` 90 - Cb\ :sub:`31` 91 * - 92 * - start2 + 0: 93 - Cr\ :sub:`00` 94 - Cr\ :sub:`01` 95 * - start2 + 2: 96 - Cr\ :sub:`10` 97 - Cr\ :sub:`11` 98 * - start2 + 4: 99 - Cr\ :sub:`20` 100 - Cr\ :sub:`21` 101 * - start2 + 6: 102 - Cr\ :sub:`30` 103 - Cr\ :sub:`31` 104 105 106**Color Sample Location:** 107 108 109 110.. flat-table:: 111 :header-rows: 0 112 :stub-columns: 0 113 114 * - 115 - 0 116 - 117 - 1 118 - 2 119 - 120 - 3 121 * - 0 122 - Y 123 - C 124 - Y 125 - Y 126 - C 127 - Y 128 * - 1 129 - Y 130 - C 131 - Y 132 - Y 133 - C 134 - Y 135 * - 2 136 - Y 137 - C 138 - Y 139 - Y 140 - C 141 - Y 142 * - 3 143 - Y 144 - C 145 - Y 146 - Y 147 - C 148 - Y 149