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@xxxxxx> --- Documentation/video4linux/4CCs.txt | 32 ++++++++++++++++++++++++++++++++ 1 files changed, 32 insertions(+), 0 deletions(-) create mode 100644 Documentation/video4linux/4CCs.txt diff --git a/Documentation/video4linux/4CCs.txt b/Documentation/video4linux/4CCs.txt new file mode 100644 index 0000000..41241af --- /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-- -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
