V4L2_PIX_FMT_NV24, 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
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.
Example 2.32. V4L2_PIX_FMT_NV24 4 × 4
pixel image
Byte Order. Each cell is one byte.
| start + 0: | Y'00 | Y'01 | Y'02 | Y'03 | ||||
| start + 4: | Y'10 | Y'11 | Y'12 | Y'13 | ||||
| start + 8: | Y'20 | Y'21 | Y'22 | Y'23 | ||||
| start + 12: | Y'30 | Y'31 | Y'32 | Y'33 | ||||
| start + 16: | Cb00 | Cr00 | Cb01 | Cr01 | Cb02 | Cr02 | Cb03 | Cr03 |
| start + 24: | Cb10 | Cr10 | Cb11 | Cr11 | Cb12 | Cr12 | Cb13 | Cr13 |
| start + 32: | Cb20 | Cr20 | Cb21 | Cr21 | Cb22 | Cr22 | Cb23 | Cr23 |
| start + 40: | Cb30 | Cr30 | Cb31 | Cr31 | Cb32 | Cr32 | Cb33 | Cr33 |