2.6.28. V4L2_PIX_FMT_NV24 (‘NV24’), V4L2_PIX_FMT_NV42 (‘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
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|