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| -rw-r--r-- | Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst | 115 |
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diff --git a/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst b/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst new file mode 100644 index 000000000..998aa9b13 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-yuv411p.rst @@ -0,0 +1,115 @@ +.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later + +.. _V4L2-PIX-FMT-YUV411P: + +***************************** +V4L2_PIX_FMT_YUV411P ('411P') +***************************** + + +Format with ¼ horizontal chroma resolution, also known as YUV 4:1:1. +Planar layout as opposed to ``V4L2_PIX_FMT_Y41P`` + + +Description +=========== + +This format is not commonly used. This is a planar format similar to the +4:2:2 planar format except with half as many chroma. The three +components are separated into three sub-images or planes. The Y plane is +first. The Y plane has one byte per pixel. The Cb plane immediately +follows the Y plane in memory. The Cb plane is ¼ the width of the Y +plane (and of the image). Each Cb belongs to 4 pixels all on the same +row. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, Y'\ :sub:`01`, +Y'\ :sub:`02` and Y'\ :sub:`03`. Following the Cb plane is the Cr plane, +just like the Cb plane. + +If the Y plane has pad bytes after each row, then the Cr and Cb planes +have ¼ as many pad bytes after their rows. In other words, four C x rows +(including padding) is exactly as long as one Y row (including padding). + +**Byte Order.** +Each cell is one byte. + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + * - start + 0: + - Y'\ :sub:`00` + - Y'\ :sub:`01` + - Y'\ :sub:`02` + - Y'\ :sub:`03` + * - start + 4: + - Y'\ :sub:`10` + - Y'\ :sub:`11` + - Y'\ :sub:`12` + - Y'\ :sub:`13` + * - start + 8: + - Y'\ :sub:`20` + - Y'\ :sub:`21` + - Y'\ :sub:`22` + - Y'\ :sub:`23` + * - start + 12: + - Y'\ :sub:`30` + - Y'\ :sub:`31` + - Y'\ :sub:`32` + - Y'\ :sub:`33` + * - start + 16: + - Cb\ :sub:`00` + * - start + 17: + - Cb\ :sub:`10` + * - start + 18: + - Cb\ :sub:`20` + * - start + 19: + - Cb\ :sub:`30` + * - start + 20: + - Cr\ :sub:`00` + * - start + 21: + - Cr\ :sub:`10` + * - start + 22: + - Cr\ :sub:`20` + * - start + 23: + - Cr\ :sub:`30` + + +**Color Sample Location:** + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + * - + - 0 + - 1 + - + - 2 + - 3 + * - 0 + - Y + - Y + - C + - Y + - Y + * - 1 + - Y + - Y + - C + - Y + - Y + * - 2 + - Y + - Y + - C + - Y + - Y + * - 3 + - Y + - Y + - C + - Y + - Y |