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diff --git a/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst b/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst new file mode 100644 index 000000000000..9f34762adf18 --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst @@ -0,0 +1,240 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _V4L2-PIX-FMT-YUV422P: + +***************************** +V4L2_PIX_FMT_YUV422P ('422P') +***************************** + +*man V4L2_PIX_FMT_YUV422P(2)* + +Format with ½ horizontal chroma resolution, also known as YUV 4:2:2. +Planar layout as opposed to ``V4L2_PIX_FMT_YUYV`` + + +Description +=========== + +This format is not commonly used. This is a planar version of the YUYV +format. 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 half +the width of the Y plane (and of the image). Each Cb belongs to two +pixels. For example, Cb\ :sub:`0` belongs to Y'\ :sub:`00`, +Y'\ :sub:`01`. 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 half as many pad bytes after their rows. In other words, two Cx +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 + :widths: 2 1 1 1 1 + + + - .. row 1 + + - start + 0: + + - Y'\ :sub:`00` + + - Y'\ :sub:`01` + + - Y'\ :sub:`02` + + - Y'\ :sub:`03` + + - .. row 2 + + - start + 4: + + - Y'\ :sub:`10` + + - Y'\ :sub:`11` + + - Y'\ :sub:`12` + + - Y'\ :sub:`13` + + - .. row 3 + + - start + 8: + + - Y'\ :sub:`20` + + - Y'\ :sub:`21` + + - Y'\ :sub:`22` + + - Y'\ :sub:`23` + + - .. row 4 + + - start + 12: + + - Y'\ :sub:`30` + + - Y'\ :sub:`31` + + - Y'\ :sub:`32` + + - Y'\ :sub:`33` + + - .. row 5 + + - start + 16: + + - Cb\ :sub:`00` + + - Cb\ :sub:`01` + + - .. row 6 + + - start + 18: + + - Cb\ :sub:`10` + + - Cb\ :sub:`11` + + - .. row 7 + + - start + 20: + + - Cb\ :sub:`20` + + - Cb\ :sub:`21` + + - .. row 8 + + - start + 22: + + - Cb\ :sub:`30` + + - Cb\ :sub:`31` + + - .. row 9 + + - start + 24: + + - Cr\ :sub:`00` + + - Cr\ :sub:`01` + + - .. row 10 + + - start + 26: + + - Cr\ :sub:`10` + + - Cr\ :sub:`11` + + - .. row 11 + + - start + 28: + + - Cr\ :sub:`20` + + - Cr\ :sub:`21` + + - .. row 12 + + - start + 30: + + - Cr\ :sub:`30` + + - Cr\ :sub:`31` + + +**Color Sample Location..** + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + + - .. row 1 + + - + - 0 + + - + - 1 + + - 2 + + - + - 3 + + - .. row 2 + + - 0 + + - Y + + - C + + - Y + + - Y + + - C + + - Y + + - .. row 3 + + - 1 + + - Y + + - C + + - Y + + - Y + + - C + + - Y + + - .. row 4 + + - 2 + + - Y + + - C + + - Y + + - Y + + - C + + - Y + + - .. row 5 + + - 3 + + - Y + + - C + + - Y + + - Y + + - C + + - Y |