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Commit 1e3afaea authored by Sakari Ailus's avatar Sakari Ailus Committed by Mauro Carvalho Chehab
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[media] v4l: Document raw bayer 4CC codes 



Document guidelines how 4CC codes should be named. Only raw bayer is
included currently. Other formats should be documented later on.

Signed-off-by: default avatarSakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent c643ee13

Documentation/video4linux/4CCs.txt

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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--