V4L2_PIX_FMT_YVU410, V4L2_PIX_FMT_YUV410 — Planar formats with ¼ horizontal and
vertical chroma resolution, also known as YUV 4:1:0
These are planar formats, as opposed to a packed 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. For
V4L2_PIX_FMT_YVU410, the Cr plane immediately
follows the Y plane in memory. The Cr plane is ¼ the width and
¼ the height of the Y plane (and of the image). Each Cr belongs
to 16 pixels, a four-by-four square of the image. Following the Cr
plane is the Cb plane, just like the Cr plane.
V4L2_PIX_FMT_YUV410 is the same, except the Cb
plane comes first, then the Cr 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 Cx rows (including padding) are exactly as long as one Y row (including padding).
Example 2.28. V4L2_PIX_FMT_YVU410 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: | Cr00 | |||
| start + 17: | Cb00 |
Color Sample Location.
| 0 | 1 | 2 | 3 | ||||
| 0 | Y | Y | Y | Y | |||
| 1 | Y | Y | Y | Y | |||
| C | |||||||
| 2 | Y | Y | Y | Y | |||
| 3 | Y | Y | Y | Y |