1*4882a593Smuzhiyun.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 2*4882a593Smuzhiyun 3*4882a593Smuzhiyun.. _V4L2-PIX-FMT-M420: 4*4882a593Smuzhiyun 5*4882a593Smuzhiyun************************** 6*4882a593SmuzhiyunV4L2_PIX_FMT_M420 ('M420') 7*4882a593Smuzhiyun************************** 8*4882a593Smuzhiyun 9*4882a593SmuzhiyunFormat with ½ horizontal and vertical chroma resolution, also known as 10*4882a593SmuzhiyunYUV 4:2:0. Hybrid plane line-interleaved layout. 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun 13*4882a593SmuzhiyunDescription 14*4882a593Smuzhiyun=========== 15*4882a593Smuzhiyun 16*4882a593SmuzhiyunM420 is a YUV format with ½ horizontal and vertical chroma subsampling 17*4882a593Smuzhiyun(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes. 18*4882a593SmuzhiyunTwo lines of luma data are followed by one line of chroma data. 19*4882a593Smuzhiyun 20*4882a593SmuzhiyunThe luma plane has one byte per pixel. The chroma plane contains 21*4882a593Smuzhiyuninterleaved CbCr pixels subsampled by ½ in the horizontal and vertical 22*4882a593Smuzhiyundirections. Each CbCr pair belongs to four pixels. For example, 23*4882a593SmuzhiyunCb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, 24*4882a593SmuzhiyunY'\ :sub:`10`, Y'\ :sub:`11`. 25*4882a593Smuzhiyun 26*4882a593SmuzhiyunAll line lengths are identical: if the Y lines include pad bytes so do 27*4882a593Smuzhiyunthe CbCr lines. 28*4882a593Smuzhiyun 29*4882a593Smuzhiyun**Byte Order.** 30*4882a593SmuzhiyunEach cell is one byte. 31*4882a593Smuzhiyun 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun.. flat-table:: 34*4882a593Smuzhiyun :header-rows: 0 35*4882a593Smuzhiyun :stub-columns: 0 36*4882a593Smuzhiyun 37*4882a593Smuzhiyun * - start + 0: 38*4882a593Smuzhiyun - Y'\ :sub:`00` 39*4882a593Smuzhiyun - Y'\ :sub:`01` 40*4882a593Smuzhiyun - Y'\ :sub:`02` 41*4882a593Smuzhiyun - Y'\ :sub:`03` 42*4882a593Smuzhiyun * - start + 4: 43*4882a593Smuzhiyun - Y'\ :sub:`10` 44*4882a593Smuzhiyun - Y'\ :sub:`11` 45*4882a593Smuzhiyun - Y'\ :sub:`12` 46*4882a593Smuzhiyun - Y'\ :sub:`13` 47*4882a593Smuzhiyun * - start + 8: 48*4882a593Smuzhiyun - Cb\ :sub:`00` 49*4882a593Smuzhiyun - Cr\ :sub:`00` 50*4882a593Smuzhiyun - Cb\ :sub:`01` 51*4882a593Smuzhiyun - Cr\ :sub:`01` 52*4882a593Smuzhiyun * - start + 16: 53*4882a593Smuzhiyun - Y'\ :sub:`20` 54*4882a593Smuzhiyun - Y'\ :sub:`21` 55*4882a593Smuzhiyun - Y'\ :sub:`22` 56*4882a593Smuzhiyun - Y'\ :sub:`23` 57*4882a593Smuzhiyun * - start + 20: 58*4882a593Smuzhiyun - Y'\ :sub:`30` 59*4882a593Smuzhiyun - Y'\ :sub:`31` 60*4882a593Smuzhiyun - Y'\ :sub:`32` 61*4882a593Smuzhiyun - Y'\ :sub:`33` 62*4882a593Smuzhiyun * - start + 24: 63*4882a593Smuzhiyun - Cb\ :sub:`10` 64*4882a593Smuzhiyun - Cr\ :sub:`10` 65*4882a593Smuzhiyun - Cb\ :sub:`11` 66*4882a593Smuzhiyun - Cr\ :sub:`11` 67*4882a593Smuzhiyun 68*4882a593Smuzhiyun 69*4882a593Smuzhiyun**Color Sample Location:** 70*4882a593Smuzhiyun 71*4882a593Smuzhiyun 72*4882a593Smuzhiyun 73*4882a593Smuzhiyun.. flat-table:: 74*4882a593Smuzhiyun :header-rows: 0 75*4882a593Smuzhiyun :stub-columns: 0 76*4882a593Smuzhiyun 77*4882a593Smuzhiyun * - 78*4882a593Smuzhiyun - 0 79*4882a593Smuzhiyun - 80*4882a593Smuzhiyun - 1 81*4882a593Smuzhiyun - 2 82*4882a593Smuzhiyun - 83*4882a593Smuzhiyun - 3 84*4882a593Smuzhiyun * - 0 85*4882a593Smuzhiyun - Y 86*4882a593Smuzhiyun - 87*4882a593Smuzhiyun - Y 88*4882a593Smuzhiyun - Y 89*4882a593Smuzhiyun - 90*4882a593Smuzhiyun - Y 91*4882a593Smuzhiyun * - 92*4882a593Smuzhiyun - 93*4882a593Smuzhiyun - C 94*4882a593Smuzhiyun - 95*4882a593Smuzhiyun - 96*4882a593Smuzhiyun - C 97*4882a593Smuzhiyun - 98*4882a593Smuzhiyun * - 1 99*4882a593Smuzhiyun - Y 100*4882a593Smuzhiyun - 101*4882a593Smuzhiyun - Y 102*4882a593Smuzhiyun - Y 103*4882a593Smuzhiyun - 104*4882a593Smuzhiyun - Y 105*4882a593Smuzhiyun * - 106*4882a593Smuzhiyun * - 2 107*4882a593Smuzhiyun - Y 108*4882a593Smuzhiyun - 109*4882a593Smuzhiyun - Y 110*4882a593Smuzhiyun - Y 111*4882a593Smuzhiyun - 112*4882a593Smuzhiyun - Y 113*4882a593Smuzhiyun * - 114*4882a593Smuzhiyun - 115*4882a593Smuzhiyun - C 116*4882a593Smuzhiyun - 117*4882a593Smuzhiyun - 118*4882a593Smuzhiyun - C 119*4882a593Smuzhiyun - 120*4882a593Smuzhiyun * - 3 121*4882a593Smuzhiyun - Y 122*4882a593Smuzhiyun - 123*4882a593Smuzhiyun - Y 124*4882a593Smuzhiyun - Y 125*4882a593Smuzhiyun - 126*4882a593Smuzhiyun - Y 127