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| author | Sakari Ailus <sakari.ailus@iki.fi> | 2012-01-17 17:47:22 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-05-14 08:38:17 -0300 |
| commit | 1e3afaea569cc12ef02cced0acb6c7e39067b169 (patch) | |
| tree | d4c92ef8477af55da02af0e32227ce4fc853d878 | |
| parent | c643ee135190389e03cffd80e762c9c71dc9a165 (diff) | |
[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 <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | Documentation/video4linux/4CCs.txt | 32 |
1 files changed, 32 insertions, 0 deletions
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-- |