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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 | .. Permission is granted to copy, distribute and/or modify this .. document under the terms of the GNU Free Documentation License, .. Version 1.1 or any later version published by the Free Software .. Foundation, with no Invariant Sections, no Front-Cover Texts .. and no Back-Cover Texts. A copy of the license is included at .. Documentation/media/uapi/fdl-appendix.rst. .. .. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections .. _V4L2-PIX-FMT-NV12M: .. _v4l2-pix-fmt-nv12mt-16x16: .. _V4L2-PIX-FMT-NV21M: *********************************************************************************** V4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16 *********************************************************************************** V4L2_PIX_FMT_NV21M V4L2_PIX_FMT_NV12MT_16X16 Variation of ``V4L2_PIX_FMT_NV12`` and ``V4L2_PIX_FMT_NV21`` with planes non contiguous in memory. Description =========== This is a multi-planar, two-plane version of the YUV 4:2:0 format. The three components are separated into two sub-images or planes. ``V4L2_PIX_FMT_NV12M`` differs from ``V4L2_PIX_FMT_NV12`` in that the two planes are non-contiguous in memory, i.e. the chroma plane do not necessarily immediately follows the luma plane. The luminance data occupies the first plane. The Y plane has one byte per pixel. In the second plane there is a chrominance data with alternating chroma samples. The CbCr plane is the same width, in bytes, as the Y plane (and of the image), but is half as tall in pixels. Each CbCr pair belongs to four pixels. For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`. ``V4L2_PIX_FMT_NV12MT_16X16`` is the tiled version of ``V4L2_PIX_FMT_NV12M`` with 16x16 macroblock tiles. Here pixels are arranged in 16x16 2D tiles and tiles are arranged in linear order in memory. ``V4L2_PIX_FMT_NV21M`` is the same as ``V4L2_PIX_FMT_NV12M`` except the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr byte. ``V4L2_PIX_FMT_NV12M`` is intended to be used only in drivers and applications that support the multi-planar API, described in :ref:`planar-apis`. If the Y plane has pad bytes after each row, then the CbCr plane has as many pad bytes after its rows. **Byte Order.** Each cell is one byte. .. flat-table:: :header-rows: 0 :stub-columns: 0 * - start0 + 0: - Y'\ :sub:`00` - Y'\ :sub:`01` - Y'\ :sub:`02` - Y'\ :sub:`03` * - start0 + 4: - Y'\ :sub:`10` - Y'\ :sub:`11` - Y'\ :sub:`12` - Y'\ :sub:`13` * - start0 + 8: - Y'\ :sub:`20` - Y'\ :sub:`21` - Y'\ :sub:`22` - Y'\ :sub:`23` * - start0 + 12: - Y'\ :sub:`30` - Y'\ :sub:`31` - Y'\ :sub:`32` - Y'\ :sub:`33` * - * - start1 + 0: - Cb\ :sub:`00` - Cr\ :sub:`00` - Cb\ :sub:`01` - Cr\ :sub:`01` * - start1 + 4: - Cb\ :sub:`10` - Cr\ :sub:`10` - Cb\ :sub:`11` - Cr\ :sub:`11` **Color Sample Location:** .. flat-table:: :header-rows: 0 :stub-columns: 0 * - - 0 - - 1 - 2 - - 3 * - 0 - Y - - Y - Y - - Y * - - - C - - - C - * - 1 - Y - - Y - Y - - Y * - * - 2 - Y - - Y - Y - - Y * - - - C - - - - C - * - 3 - Y - - Y - Y - - Y |