V4L2_PIX_FMT_YUV422M ('YM16'), V4L2_PIX_FMT_YVU422M ('YM61')
&manvol;
V4L2_PIX_FMT_YUV422M
V4L2_PIX_FMT_YVU422M
Planar formats with ½ horizontal resolution, also
known as YUV and YVU 4:2:2
Description
This is a multi-planar format, 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_YUV422M the Cb data
constitutes the second plane which is half the width of the Y plane (and of the
image). Each Cb belongs to two pixels. For example,
Cb0 belongs to Y'00,
Y'01. The Cr data, just like the Cb plane, is
in the third plane.
V4L2_PIX_FMT_YVU422M is the same except
the Cr data is stored in the second plane and the Cb data in the third plane.
If the Y plane has pad bytes after each row, then the Cb
and Cr planes have half as many pad bytes after their rows. In other
words, two Cx rows (including padding) is exactly as long as one Y row
(including padding).
V4L2_PIX_FMT_YUV422M and
V4L2_PIX_FMT_YVU422M are intended to be
used only in drivers and applications that support the multi-planar API,
described in .
<constant>V4L2_PIX_FMT_YUV422M</constant> 4 × 4
pixel image
Byte Order.
Each cell is one byte.
start0 + 0:
Y'00
Y'01
Y'02
Y'03
start0 + 4:
Y'10
Y'11
Y'12
Y'13
start0 + 8:
Y'20
Y'21
Y'22
Y'23
start0 + 12:
Y'30
Y'31
Y'32
Y'33
|
start1 + 0:
Cb00
Cb01
start1 + 2:
Cb10
Cb11
start1 + 4:
Cb20
Cb21
start1 + 6:
Cb30
Cb31
|
start2 + 0:
Cr00
Cr01
start2 + 2:
Cr10
Cr11
start2 + 4:
Cr20
Cr21
start2 + 6:
Cr30
Cr31
Color Sample Location.
01
23
0
YCY
YCY
1
YCY
YCY
2
YCY
YCY
3
YCY
YCY