1059b1c5bSMauro Carvalho Chehab.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 254f38fcaSMauro Carvalho Chehab 354f38fcaSMauro Carvalho Chehab.. _V4L2-PIX-FMT-M420: 454f38fcaSMauro Carvalho Chehab 554f38fcaSMauro Carvalho Chehab************************** 654f38fcaSMauro Carvalho ChehabV4L2_PIX_FMT_M420 ('M420') 754f38fcaSMauro Carvalho Chehab************************** 854f38fcaSMauro Carvalho Chehab 954f38fcaSMauro Carvalho ChehabFormat with ½ horizontal and vertical chroma resolution, also known as 1054f38fcaSMauro Carvalho ChehabYUV 4:2:0. Hybrid plane line-interleaved layout. 1154f38fcaSMauro Carvalho Chehab 1254f38fcaSMauro Carvalho Chehab 1354f38fcaSMauro Carvalho ChehabDescription 1454f38fcaSMauro Carvalho Chehab=========== 1554f38fcaSMauro Carvalho Chehab 1654f38fcaSMauro Carvalho ChehabM420 is a YUV format with ½ horizontal and vertical chroma subsampling 1754f38fcaSMauro Carvalho Chehab(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes. 1854f38fcaSMauro Carvalho ChehabTwo lines of luma data are followed by one line of chroma data. 1954f38fcaSMauro Carvalho Chehab 2054f38fcaSMauro Carvalho ChehabThe luma plane has one byte per pixel. The chroma plane contains 2154f38fcaSMauro Carvalho Chehabinterleaved CbCr pixels subsampled by ½ in the horizontal and vertical 2254f38fcaSMauro Carvalho Chehabdirections. Each CbCr pair belongs to four pixels. For example, 2354f38fcaSMauro Carvalho ChehabCb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, 2454f38fcaSMauro Carvalho ChehabY'\ :sub:`10`, Y'\ :sub:`11`. 2554f38fcaSMauro Carvalho Chehab 2654f38fcaSMauro Carvalho ChehabAll line lengths are identical: if the Y lines include pad bytes so do 2754f38fcaSMauro Carvalho Chehabthe CbCr lines. 2854f38fcaSMauro Carvalho Chehab 2954f38fcaSMauro Carvalho Chehab**Byte Order.** 3054f38fcaSMauro Carvalho ChehabEach cell is one byte. 3154f38fcaSMauro Carvalho Chehab 3254f38fcaSMauro Carvalho Chehab 3354f38fcaSMauro Carvalho Chehab.. flat-table:: 3454f38fcaSMauro Carvalho Chehab :header-rows: 0 3554f38fcaSMauro Carvalho Chehab :stub-columns: 0 3654f38fcaSMauro Carvalho Chehab 3754f38fcaSMauro Carvalho Chehab * - start + 0: 3854f38fcaSMauro Carvalho Chehab - Y'\ :sub:`00` 3954f38fcaSMauro Carvalho Chehab - Y'\ :sub:`01` 4054f38fcaSMauro Carvalho Chehab - Y'\ :sub:`02` 4154f38fcaSMauro Carvalho Chehab - Y'\ :sub:`03` 4254f38fcaSMauro Carvalho Chehab * - start + 4: 4354f38fcaSMauro Carvalho Chehab - Y'\ :sub:`10` 4454f38fcaSMauro Carvalho Chehab - Y'\ :sub:`11` 4554f38fcaSMauro Carvalho Chehab - Y'\ :sub:`12` 4654f38fcaSMauro Carvalho Chehab - Y'\ :sub:`13` 4754f38fcaSMauro Carvalho Chehab * - start + 8: 4854f38fcaSMauro Carvalho Chehab - Cb\ :sub:`00` 4954f38fcaSMauro Carvalho Chehab - Cr\ :sub:`00` 5054f38fcaSMauro Carvalho Chehab - Cb\ :sub:`01` 5154f38fcaSMauro Carvalho Chehab - Cr\ :sub:`01` 5254f38fcaSMauro Carvalho Chehab * - start + 16: 5354f38fcaSMauro Carvalho Chehab - Y'\ :sub:`20` 5454f38fcaSMauro Carvalho Chehab - Y'\ :sub:`21` 5554f38fcaSMauro Carvalho Chehab - Y'\ :sub:`22` 5654f38fcaSMauro Carvalho Chehab - Y'\ :sub:`23` 5754f38fcaSMauro Carvalho Chehab * - start + 20: 5854f38fcaSMauro Carvalho Chehab - Y'\ :sub:`30` 5954f38fcaSMauro Carvalho Chehab - Y'\ :sub:`31` 6054f38fcaSMauro Carvalho Chehab - Y'\ :sub:`32` 6154f38fcaSMauro Carvalho Chehab - Y'\ :sub:`33` 6254f38fcaSMauro Carvalho Chehab * - start + 24: 6354f38fcaSMauro Carvalho Chehab - Cb\ :sub:`10` 6454f38fcaSMauro Carvalho Chehab - Cr\ :sub:`10` 6554f38fcaSMauro Carvalho Chehab - Cb\ :sub:`11` 6654f38fcaSMauro Carvalho Chehab - Cr\ :sub:`11` 6754f38fcaSMauro Carvalho Chehab 6854f38fcaSMauro Carvalho Chehab 6954f38fcaSMauro Carvalho Chehab**Color Sample Location:** 70*e3ae4c20SLaurent PinchartChroma samples are :ref:`interstitially sited<yuv-chroma-centered>` 71*e3ae4c20SLaurent Pincharthorizontally and vertically. 72