162306a36Sopenharmony_ci.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later 262306a36Sopenharmony_ci 362306a36Sopenharmony_ci.. _V4L2-PIX-FMT-M420: 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci************************** 662306a36Sopenharmony_ciV4L2_PIX_FMT_M420 ('M420') 762306a36Sopenharmony_ci************************** 862306a36Sopenharmony_ci 962306a36Sopenharmony_ciFormat with ½ horizontal and vertical chroma resolution, also known as 1062306a36Sopenharmony_ciYUV 4:2:0. Hybrid plane line-interleaved layout. 1162306a36Sopenharmony_ci 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_ciDescription 1462306a36Sopenharmony_ci=========== 1562306a36Sopenharmony_ci 1662306a36Sopenharmony_ciM420 is a YUV format with ½ horizontal and vertical chroma subsampling 1762306a36Sopenharmony_ci(YUV 4:2:0). Pixels are organized as interleaved luma and chroma planes. 1862306a36Sopenharmony_ciTwo lines of luma data are followed by one line of chroma data. 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_ciThe luma plane has one byte per pixel. The chroma plane contains 2162306a36Sopenharmony_ciinterleaved CbCr pixels subsampled by ½ in the horizontal and vertical 2262306a36Sopenharmony_cidirections. Each CbCr pair belongs to four pixels. For example, 2362306a36Sopenharmony_ciCb\ :sub:`0`/Cr\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, 2462306a36Sopenharmony_ciY'\ :sub:`10`, Y'\ :sub:`11`. 2562306a36Sopenharmony_ci 2662306a36Sopenharmony_ciAll line lengths are identical: if the Y lines include pad bytes so do 2762306a36Sopenharmony_cithe CbCr lines. 2862306a36Sopenharmony_ci 2962306a36Sopenharmony_ci**Byte Order.** 3062306a36Sopenharmony_ciEach cell is one byte. 3162306a36Sopenharmony_ci 3262306a36Sopenharmony_ci 3362306a36Sopenharmony_ci.. flat-table:: 3462306a36Sopenharmony_ci :header-rows: 0 3562306a36Sopenharmony_ci :stub-columns: 0 3662306a36Sopenharmony_ci 3762306a36Sopenharmony_ci * - start + 0: 3862306a36Sopenharmony_ci - Y'\ :sub:`00` 3962306a36Sopenharmony_ci - Y'\ :sub:`01` 4062306a36Sopenharmony_ci - Y'\ :sub:`02` 4162306a36Sopenharmony_ci - Y'\ :sub:`03` 4262306a36Sopenharmony_ci * - start + 4: 4362306a36Sopenharmony_ci - Y'\ :sub:`10` 4462306a36Sopenharmony_ci - Y'\ :sub:`11` 4562306a36Sopenharmony_ci - Y'\ :sub:`12` 4662306a36Sopenharmony_ci - Y'\ :sub:`13` 4762306a36Sopenharmony_ci * - start + 8: 4862306a36Sopenharmony_ci - Cb\ :sub:`00` 4962306a36Sopenharmony_ci - Cr\ :sub:`00` 5062306a36Sopenharmony_ci - Cb\ :sub:`01` 5162306a36Sopenharmony_ci - Cr\ :sub:`01` 5262306a36Sopenharmony_ci * - start + 16: 5362306a36Sopenharmony_ci - Y'\ :sub:`20` 5462306a36Sopenharmony_ci - Y'\ :sub:`21` 5562306a36Sopenharmony_ci - Y'\ :sub:`22` 5662306a36Sopenharmony_ci - Y'\ :sub:`23` 5762306a36Sopenharmony_ci * - start + 20: 5862306a36Sopenharmony_ci - Y'\ :sub:`30` 5962306a36Sopenharmony_ci - Y'\ :sub:`31` 6062306a36Sopenharmony_ci - Y'\ :sub:`32` 6162306a36Sopenharmony_ci - Y'\ :sub:`33` 6262306a36Sopenharmony_ci * - start + 24: 6362306a36Sopenharmony_ci - Cb\ :sub:`10` 6462306a36Sopenharmony_ci - Cr\ :sub:`10` 6562306a36Sopenharmony_ci - Cb\ :sub:`11` 6662306a36Sopenharmony_ci - Cr\ :sub:`11` 6762306a36Sopenharmony_ci 6862306a36Sopenharmony_ci 6962306a36Sopenharmony_ci**Color Sample Location:** 7062306a36Sopenharmony_ciChroma samples are :ref:`interstitially sited<yuv-chroma-centered>` 7162306a36Sopenharmony_cihorizontally and vertically. 72