1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun.. _V4L2-PIX-FMT-NV12M: 4*4882a593Smuzhiyun.. _v4l2-pix-fmt-nv12mt-16x16: 5*4882a593Smuzhiyun.. _V4L2-PIX-FMT-NV21M: 6*4882a593Smuzhiyun 7*4882a593Smuzhiyun*********************************************************************************** 8*4882a593SmuzhiyunV4L2_PIX_FMT_NV12M ('NM12'), V4L2_PIX_FMT_NV21M ('NM21'), V4L2_PIX_FMT_NV12MT_16X16 9*4882a593Smuzhiyun*********************************************************************************** 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun 12*4882a593SmuzhiyunV4L2_PIX_FMT_NV21M 13*4882a593SmuzhiyunV4L2_PIX_FMT_NV12MT_16X16 14*4882a593SmuzhiyunVariation of ``V4L2_PIX_FMT_NV12`` and ``V4L2_PIX_FMT_NV21`` with planes 15*4882a593Smuzhiyunnon contiguous in memory. 16*4882a593Smuzhiyun 17*4882a593Smuzhiyun 18*4882a593SmuzhiyunDescription 19*4882a593Smuzhiyun=========== 20*4882a593Smuzhiyun 21*4882a593SmuzhiyunThis is a multi-planar, two-plane version of the YUV 4:2:0 format. The 22*4882a593Smuzhiyunthree components are separated into two sub-images or planes. 23*4882a593Smuzhiyun``V4L2_PIX_FMT_NV12M`` differs from ``V4L2_PIX_FMT_NV12`` in that the 24*4882a593Smuzhiyuntwo planes are non-contiguous in memory, i.e. the chroma plane do not 25*4882a593Smuzhiyunnecessarily immediately follows the luma plane. The luminance data 26*4882a593Smuzhiyunoccupies the first plane. The Y plane has one byte per pixel. In the 27*4882a593Smuzhiyunsecond plane there is a chrominance data with alternating chroma 28*4882a593Smuzhiyunsamples. The CbCr plane is the same width, in bytes, as the Y plane (and 29*4882a593Smuzhiyunof the image), but is half as tall in pixels. Each CbCr pair belongs to 30*4882a593Smuzhiyunfour pixels. For example, Cb\ :sub:`0`/Cr\ :sub:`0` belongs to 31*4882a593SmuzhiyunY'\ :sub:`00`, Y'\ :sub:`01`, Y'\ :sub:`10`, Y'\ :sub:`11`. 32*4882a593Smuzhiyun``V4L2_PIX_FMT_NV12MT_16X16`` is the tiled version of 33*4882a593Smuzhiyun``V4L2_PIX_FMT_NV12M`` with 16x16 macroblock tiles. Here pixels are 34*4882a593Smuzhiyunarranged in 16x16 2D tiles and tiles are arranged in linear order in 35*4882a593Smuzhiyunmemory. ``V4L2_PIX_FMT_NV21M`` is the same as ``V4L2_PIX_FMT_NV12M`` 36*4882a593Smuzhiyunexcept the Cb and Cr bytes are swapped, the CrCb plane starts with a Cr 37*4882a593Smuzhiyunbyte. 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun``V4L2_PIX_FMT_NV12M`` is intended to be used only in drivers and 40*4882a593Smuzhiyunapplications that support the multi-planar API, described in 41*4882a593Smuzhiyun:ref:`planar-apis`. 42*4882a593Smuzhiyun 43*4882a593SmuzhiyunIf the Y plane has pad bytes after each row, then the CbCr plane has as 44*4882a593Smuzhiyunmany pad bytes after its rows. 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun**Byte Order.** 47*4882a593SmuzhiyunEach cell is one byte. 48*4882a593Smuzhiyun 49*4882a593Smuzhiyun.. flat-table:: 50*4882a593Smuzhiyun :header-rows: 0 51*4882a593Smuzhiyun :stub-columns: 0 52*4882a593Smuzhiyun 53*4882a593Smuzhiyun * - start0 + 0: 54*4882a593Smuzhiyun - Y'\ :sub:`00` 55*4882a593Smuzhiyun - Y'\ :sub:`01` 56*4882a593Smuzhiyun - Y'\ :sub:`02` 57*4882a593Smuzhiyun - Y'\ :sub:`03` 58*4882a593Smuzhiyun * - start0 + 4: 59*4882a593Smuzhiyun - Y'\ :sub:`10` 60*4882a593Smuzhiyun - Y'\ :sub:`11` 61*4882a593Smuzhiyun - Y'\ :sub:`12` 62*4882a593Smuzhiyun - Y'\ :sub:`13` 63*4882a593Smuzhiyun * - start0 + 8: 64*4882a593Smuzhiyun - Y'\ :sub:`20` 65*4882a593Smuzhiyun - Y'\ :sub:`21` 66*4882a593Smuzhiyun - Y'\ :sub:`22` 67*4882a593Smuzhiyun - Y'\ :sub:`23` 68*4882a593Smuzhiyun * - start0 + 12: 69*4882a593Smuzhiyun - Y'\ :sub:`30` 70*4882a593Smuzhiyun - Y'\ :sub:`31` 71*4882a593Smuzhiyun - Y'\ :sub:`32` 72*4882a593Smuzhiyun - Y'\ :sub:`33` 73*4882a593Smuzhiyun * - 74*4882a593Smuzhiyun * - start1 + 0: 75*4882a593Smuzhiyun - Cb\ :sub:`00` 76*4882a593Smuzhiyun - Cr\ :sub:`00` 77*4882a593Smuzhiyun - Cb\ :sub:`01` 78*4882a593Smuzhiyun - Cr\ :sub:`01` 79*4882a593Smuzhiyun * - start1 + 4: 80*4882a593Smuzhiyun - Cb\ :sub:`10` 81*4882a593Smuzhiyun - Cr\ :sub:`10` 82*4882a593Smuzhiyun - Cb\ :sub:`11` 83*4882a593Smuzhiyun - Cr\ :sub:`11` 84*4882a593Smuzhiyun 85*4882a593Smuzhiyun 86*4882a593Smuzhiyun**Color Sample Location:** 87*4882a593Smuzhiyun 88*4882a593Smuzhiyun 89*4882a593Smuzhiyun 90*4882a593Smuzhiyun.. flat-table:: 91*4882a593Smuzhiyun :header-rows: 0 92*4882a593Smuzhiyun :stub-columns: 0 93*4882a593Smuzhiyun 94*4882a593Smuzhiyun * - 95*4882a593Smuzhiyun - 0 96*4882a593Smuzhiyun - 97*4882a593Smuzhiyun - 1 98*4882a593Smuzhiyun - 2 99*4882a593Smuzhiyun - 100*4882a593Smuzhiyun - 3 101*4882a593Smuzhiyun * - 0 102*4882a593Smuzhiyun - Y 103*4882a593Smuzhiyun - 104*4882a593Smuzhiyun - Y 105*4882a593Smuzhiyun - Y 106*4882a593Smuzhiyun - 107*4882a593Smuzhiyun - Y 108*4882a593Smuzhiyun * - 109*4882a593Smuzhiyun - 110*4882a593Smuzhiyun - C 111*4882a593Smuzhiyun - 112*4882a593Smuzhiyun - 113*4882a593Smuzhiyun - C 114*4882a593Smuzhiyun - 115*4882a593Smuzhiyun * - 1 116*4882a593Smuzhiyun - Y 117*4882a593Smuzhiyun - 118*4882a593Smuzhiyun - Y 119*4882a593Smuzhiyun - Y 120*4882a593Smuzhiyun - 121*4882a593Smuzhiyun - Y 122*4882a593Smuzhiyun * - 123*4882a593Smuzhiyun * - 2 124*4882a593Smuzhiyun - Y 125*4882a593Smuzhiyun - 126*4882a593Smuzhiyun - Y 127*4882a593Smuzhiyun - Y 128*4882a593Smuzhiyun - 129*4882a593Smuzhiyun - Y 130*4882a593Smuzhiyun * - 131*4882a593Smuzhiyun - 132*4882a593Smuzhiyun - C 133*4882a593Smuzhiyun - 134*4882a593Smuzhiyun - 135*4882a593Smuzhiyun - 136*4882a593Smuzhiyun - C 137*4882a593Smuzhiyun - 138*4882a593Smuzhiyun * - 3 139*4882a593Smuzhiyun - Y 140*4882a593Smuzhiyun - 141*4882a593Smuzhiyun - Y 142*4882a593Smuzhiyun - Y 143*4882a593Smuzhiyun - 144*4882a593Smuzhiyun - Y 145