V4L2_PIX_FMT_YVU410 ('YVU9'), V4L2_PIX_FMT_YUV410 ('YUV9')


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 2-1. V4L2_PIX_FMT_YVU410 4 × 4 pixel image

Byte Order. Each cell is one byte.

start + 0:Y'00Y'01Y'02Y'03
start + 4:Y'10Y'11Y'12Y'13
start + 8:Y'20Y'21Y'22Y'23
start + 12:Y'30Y'31Y'32Y'33
start + 16:Cr00   
start + 17:Cb00   

Color Sample Location.

 0 1 2 3
0Y Y Y Y
1Y Y Y Y
2Y Y Y Y
3Y Y Y Y