2.6.29. 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 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