mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
1e3afaea56
Document guidelines how 4CC codes should be named. Only raw bayer is included currently. Other formats should be documented later on. Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
33 lines
776 B
Plaintext
33 lines
776 B
Plaintext
Guidelines for Linux4Linux pixel format 4CCs
|
|
============================================
|
|
|
|
Guidelines for Video4Linux 4CC codes defined using v4l2_fourcc() are
|
|
specified in this document. First of the characters defines the nature of
|
|
the pixel format, compression and colour space. The interpretation of the
|
|
other three characters depends on the first one.
|
|
|
|
Existing 4CCs may not obey these guidelines.
|
|
|
|
Formats
|
|
=======
|
|
|
|
Raw bayer
|
|
---------
|
|
|
|
The following first characters are used by raw bayer formats:
|
|
|
|
B: raw bayer, uncompressed
|
|
b: raw bayer, DPCM compressed
|
|
a: A-law compressed
|
|
u: u-law compressed
|
|
|
|
2nd character: pixel order
|
|
B: BGGR
|
|
G: GBRG
|
|
g: GRBG
|
|
R: RGGB
|
|
|
|
3rd character: uncompressed bits-per-pixel 0--9, A--
|
|
|
|
4th character: compressed bits-per-pixel 0--9, A--
|