1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun.. _V4L2-PIX-FMT-YUV422M: 4*4882a593Smuzhiyun.. _v4l2-pix-fmt-yvu422m: 5*4882a593Smuzhiyun 6*4882a593Smuzhiyun************************************************************ 7*4882a593SmuzhiyunV4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61') 8*4882a593Smuzhiyun************************************************************ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun 11*4882a593SmuzhiyunV4L2_PIX_FMT_YVU422M 12*4882a593SmuzhiyunPlanar formats with ½ horizontal resolution, also known as YUV and YVU 13*4882a593Smuzhiyun4:2:2 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunDescription 17*4882a593Smuzhiyun=========== 18*4882a593Smuzhiyun 19*4882a593SmuzhiyunThis is a multi-planar format, as opposed to a packed format. The three 20*4882a593Smuzhiyuncomponents are separated into three sub-images or planes. 21*4882a593Smuzhiyun 22*4882a593SmuzhiyunThe Y plane is first. The Y plane has one byte per pixel. For 23*4882a593Smuzhiyun``V4L2_PIX_FMT_YUV422M`` the Cb data constitutes the second plane which 24*4882a593Smuzhiyunis half the width of the Y plane (and of the image). Each Cb belongs to 25*4882a593Smuzhiyuntwo pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, 26*4882a593SmuzhiyunY'\ :sub:`01`. The Cr data, just like the Cb plane, is in the third 27*4882a593Smuzhiyunplane. 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun``V4L2_PIX_FMT_YVU422M`` is the same except the Cr data is stored in the 30*4882a593Smuzhiyunsecond plane and the Cb data in the third plane. 31*4882a593Smuzhiyun 32*4882a593SmuzhiyunIf the Y plane has pad bytes after each row, then the Cb and Cr planes 33*4882a593Smuzhiyunhave half as many pad bytes after their rows. In other words, two Cx 34*4882a593Smuzhiyunrows (including padding) is exactly as long as one Y row (including 35*4882a593Smuzhiyunpadding). 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun``V4L2_PIX_FMT_YUV422M`` and ``V4L2_PIX_FMT_YVU422M`` are intended to be 38*4882a593Smuzhiyunused only in drivers and applications that support the multi-planar API, 39*4882a593Smuzhiyundescribed in :ref:`planar-apis`. 40*4882a593Smuzhiyun 41*4882a593Smuzhiyun**Byte Order.** 42*4882a593SmuzhiyunEach cell is one byte. 43*4882a593Smuzhiyun 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun 47*4882a593Smuzhiyun.. flat-table:: 48*4882a593Smuzhiyun :header-rows: 0 49*4882a593Smuzhiyun :stub-columns: 0 50*4882a593Smuzhiyun 51*4882a593Smuzhiyun * - start0 + 0: 52*4882a593Smuzhiyun - Y'\ :sub:`00` 53*4882a593Smuzhiyun - Y'\ :sub:`01` 54*4882a593Smuzhiyun - Y'\ :sub:`02` 55*4882a593Smuzhiyun - Y'\ :sub:`03` 56*4882a593Smuzhiyun * - start0 + 4: 57*4882a593Smuzhiyun - Y'\ :sub:`10` 58*4882a593Smuzhiyun - Y'\ :sub:`11` 59*4882a593Smuzhiyun - Y'\ :sub:`12` 60*4882a593Smuzhiyun - Y'\ :sub:`13` 61*4882a593Smuzhiyun * - start0 + 8: 62*4882a593Smuzhiyun - Y'\ :sub:`20` 63*4882a593Smuzhiyun - Y'\ :sub:`21` 64*4882a593Smuzhiyun - Y'\ :sub:`22` 65*4882a593Smuzhiyun - Y'\ :sub:`23` 66*4882a593Smuzhiyun * - start0 + 12: 67*4882a593Smuzhiyun - Y'\ :sub:`30` 68*4882a593Smuzhiyun - Y'\ :sub:`31` 69*4882a593Smuzhiyun - Y'\ :sub:`32` 70*4882a593Smuzhiyun - Y'\ :sub:`33` 71*4882a593Smuzhiyun * - 72*4882a593Smuzhiyun * - start1 + 0: 73*4882a593Smuzhiyun - Cb\ :sub:`00` 74*4882a593Smuzhiyun - Cb\ :sub:`01` 75*4882a593Smuzhiyun * - start1 + 2: 76*4882a593Smuzhiyun - Cb\ :sub:`10` 77*4882a593Smuzhiyun - Cb\ :sub:`11` 78*4882a593Smuzhiyun * - start1 + 4: 79*4882a593Smuzhiyun - Cb\ :sub:`20` 80*4882a593Smuzhiyun - Cb\ :sub:`21` 81*4882a593Smuzhiyun * - start1 + 6: 82*4882a593Smuzhiyun - Cb\ :sub:`30` 83*4882a593Smuzhiyun - Cb\ :sub:`31` 84*4882a593Smuzhiyun * - 85*4882a593Smuzhiyun * - start2 + 0: 86*4882a593Smuzhiyun - Cr\ :sub:`00` 87*4882a593Smuzhiyun - Cr\ :sub:`01` 88*4882a593Smuzhiyun * - start2 + 2: 89*4882a593Smuzhiyun - Cr\ :sub:`10` 90*4882a593Smuzhiyun - Cr\ :sub:`11` 91*4882a593Smuzhiyun * - start2 + 4: 92*4882a593Smuzhiyun - Cr\ :sub:`20` 93*4882a593Smuzhiyun - Cr\ :sub:`21` 94*4882a593Smuzhiyun * - start2 + 6: 95*4882a593Smuzhiyun - Cr\ :sub:`30` 96*4882a593Smuzhiyun - Cr\ :sub:`31` 97*4882a593Smuzhiyun 98*4882a593Smuzhiyun 99*4882a593Smuzhiyun**Color Sample Location:** 100*4882a593Smuzhiyun 101*4882a593Smuzhiyun 102*4882a593Smuzhiyun 103*4882a593Smuzhiyun.. flat-table:: 104*4882a593Smuzhiyun :header-rows: 0 105*4882a593Smuzhiyun :stub-columns: 0 106*4882a593Smuzhiyun 107*4882a593Smuzhiyun * - 108*4882a593Smuzhiyun - 0 109*4882a593Smuzhiyun - 110*4882a593Smuzhiyun - 1 111*4882a593Smuzhiyun - 2 112*4882a593Smuzhiyun - 113*4882a593Smuzhiyun - 3 114*4882a593Smuzhiyun * - 0 115*4882a593Smuzhiyun - Y 116*4882a593Smuzhiyun - C 117*4882a593Smuzhiyun - Y 118*4882a593Smuzhiyun - Y 119*4882a593Smuzhiyun - C 120*4882a593Smuzhiyun - Y 121*4882a593Smuzhiyun * - 1 122*4882a593Smuzhiyun - Y 123*4882a593Smuzhiyun - C 124*4882a593Smuzhiyun - Y 125*4882a593Smuzhiyun - Y 126*4882a593Smuzhiyun - C 127*4882a593Smuzhiyun - Y 128*4882a593Smuzhiyun * - 2 129*4882a593Smuzhiyun - Y 130*4882a593Smuzhiyun - C 131*4882a593Smuzhiyun - Y 132*4882a593Smuzhiyun - Y 133*4882a593Smuzhiyun - C 134*4882a593Smuzhiyun - Y 135*4882a593Smuzhiyun * - 3 136*4882a593Smuzhiyun - Y 137*4882a593Smuzhiyun - C 138*4882a593Smuzhiyun - Y 139*4882a593Smuzhiyun - Y 140*4882a593Smuzhiyun - C 141*4882a593Smuzhiyun - Y 142