From: Sakari Ailus Date: Tue, 17 Jan 2012 20:47:22 +0000 (-0300) Subject: [media] v4l: Document raw bayer 4CC codes X-Git-Url: https://openfabrics.org/gitweb/?a=commitdiff_plain;h=1e3afaea569cc12ef02cced0acb6c7e39067b169;p=~shefty%2Frdma-dev.git [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: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- diff --git a/Documentation/video4linux/4CCs.txt b/Documentation/video4linux/4CCs.txt new file mode 100644 index 00000000000..41241af1ebf --- /dev/null +++ b/Documentation/video4linux/4CCs.txt @@ -0,0 +1,32 @@ +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--