2.6.21. V4L2_PIX_FMT_YVU410 (‘YVU9’), V4L2_PIX_FMT_YUV410 (‘YUV9’)

V4L2_PIX_FMT_YUV410 Planar formats with ¼ horizontal and vertical chroma resolution, also known as YUV 4:1:0

2.6.21.1. Description

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).

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