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diff --git a/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst b/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst new file mode 100644 index 000000000000..c6fb97bd0472 --- /dev/null +++ b/Documentation/userspace-api/media/v4l/pixfmt-nv24.rst @@ -0,0 +1,102 @@ +.. Permission is granted to copy, distribute and/or modify this +.. document under the terms of the GNU Free Documentation License, +.. Version 1.1 or any later version published by the Free Software +.. Foundation, with no Invariant Sections, no Front-Cover Texts +.. and no Back-Cover Texts. A copy of the license is included at +.. Documentation/userspace-api/media/fdl-appendix.rst. +.. +.. TODO: replace it to GFDL-1.1-or-later WITH no-invariant-sections + +.. _V4L2-PIX-FMT-NV24: +.. _V4L2-PIX-FMT-NV42: + +****************************************************** +V4L2_PIX_FMT_NV24 ('NV24'), V4L2_PIX_FMT_NV42 ('NV42') +****************************************************** + +V4L2_PIX_FMT_NV42 +Formats with full horizontal and vertical chroma resolutions, also known +as YUV 4:4:4. One luminance and one chrominance plane with alternating +chroma samples as opposed to ``V4L2_PIX_FMT_YVU420`` + + +Description +=========== + +These are two-plane versions of the YUV 4:4:4 format. The three +components are separated into two sub-images or planes. The Y plane is +first, with each Y sample stored in one byte per pixel. For +``V4L2_PIX_FMT_NV24``, a combined CbCr plane immediately follows the Y +plane in memory. The CbCr plane has the same width and height, in +pixels, as the Y plane (and the image). Each line contains one CbCr pair +per pixel, with each Cb and Cr sample stored in one byte. +``V4L2_PIX_FMT_NV42`` is the same except that the Cb and Cr samples are +swapped, the CrCb plane starts with a Cr sample. + +If the Y plane has pad bytes after each row, then the CbCr plane has +twice as many pad bytes after its rows. + +**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` + - Cr\ :sub:`00` + - Cb\ :sub:`01` + - Cr\ :sub:`01` + - Cb\ :sub:`02` + - Cr\ :sub:`02` + - Cb\ :sub:`03` + - Cr\ :sub:`03` + * - start + 24: + - Cb\ :sub:`10` + - Cr\ :sub:`10` + - Cb\ :sub:`11` + - Cr\ :sub:`11` + - Cb\ :sub:`12` + - Cr\ :sub:`12` + - Cb\ :sub:`13` + - Cr\ :sub:`13` + * - start + 32: + - Cb\ :sub:`20` + - Cr\ :sub:`20` + - Cb\ :sub:`21` + - Cr\ :sub:`21` + - Cb\ :sub:`22` + - Cr\ :sub:`22` + - Cb\ :sub:`23` + - Cr\ :sub:`23` + * - start + 40: + - Cb\ :sub:`30` + - Cr\ :sub:`30` + - Cb\ :sub:`31` + - Cr\ :sub:`31` + - Cb\ :sub:`32` + - Cr\ :sub:`32` + - Cb\ :sub:`33` + - Cr\ :sub:`33` |