2.7.30. 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

2.7.30.1. 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.

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