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| -rw-r--r-- | Documentation/media/uapi/v4l/pixfmt-yuv422p.rst | 129 |
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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 000000000..a96f836c7 --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-yuv422p.rst @@ -0,0 +1,129 @@ +.. -*- coding: utf-8; mode: rst -*- + +.. _V4L2-PIX-FMT-YUV422P: + +***************************** +V4L2_PIX_FMT_YUV422P ('422P') +***************************** + + +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 + + * - 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` + - Cb\ :sub:`01` + * - start + 18: + - Cb\ :sub:`10` + - Cb\ :sub:`11` + * - start + 20: + - Cb\ :sub:`20` + - Cb\ :sub:`21` + * - start + 22: + - Cb\ :sub:`30` + - Cb\ :sub:`31` + * - start + 24: + - Cr\ :sub:`00` + - Cr\ :sub:`01` + * - start + 26: + - Cr\ :sub:`10` + - Cr\ :sub:`11` + * - start + 28: + - Cr\ :sub:`20` + - Cr\ :sub:`21` + * - start + 30: + - Cr\ :sub:`30` + - Cr\ :sub:`31` + + +**Color Sample Location:** + + + +.. flat-table:: + :header-rows: 0 + :stub-columns: 0 + + * - + - 0 + - + - 1 + - 2 + - + - 3 + * - 0 + - Y + - C + - Y + - Y + - C + - Y + * - 1 + - Y + - C + - Y + - Y + - C + - Y + * - 2 + - Y + - C + - Y + - Y + - C + - Y + * - 3 + - Y + - C + - Y + - Y + - C + - Y |