2.10.28. 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

2.10.28.1. 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