diff options
| author | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2020-12-07 00:03:06 +0100 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-12-07 14:02:37 +0100 |
| commit | e9a66489c383bc11f786db1d79e952e89cb137fe (patch) | |
| tree | 6dce250fbd7ea3d0ecbf521d86470ee273f880e1 /include/uapi/linux/videodev2.h | |
| parent | 67c2a10bff74e938279bb519d2853babbd52c1d7 (diff) | |
media: doc: pixfmt-rgb: Clarify naming scheme for RGB formats
The naming scheme for the RGB pixel formats has been developed
organically, and isn't consistent between formats using less than 8 bits
per pixels (mostly stored in 1 or 2 bytes per pixel, except for RGB666
that uses 4 bytes per pixel) and formats with 8 bits per pixel (stored
in 3 or 4 bytes). For the latter category, the names use a components
order convention that is the opposite of the first category, and the
opposite of DRM pixel formats. This has led to lots of confusion in the
past, and would really benefit from being explained more precisely. Do
so, which also prepares for the addition of additional RGB pixels
formats.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/uapi/linux/videodev2.h')
| -rw-r--r-- | include/uapi/linux/videodev2.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h index be07bb01d936..79dbde3bcf8d 100644 --- a/include/uapi/linux/videodev2.h +++ b/include/uapi/linux/videodev2.h @@ -515,7 +515,7 @@ struct v4l2_pix_format { /* Pixel format FOURCC depth Description */ -/* RGB formats */ +/* RGB formats (1 or 2 bytes per pixel) */ #define V4L2_PIX_FMT_RGB332 v4l2_fourcc('R', 'G', 'B', '1') /* 8 RGB-3-3-2 */ #define V4L2_PIX_FMT_RGB444 v4l2_fourcc('R', '4', '4', '4') /* 16 xxxxrrrr ggggbbbb */ #define V4L2_PIX_FMT_ARGB444 v4l2_fourcc('A', 'R', '1', '2') /* 16 aaaarrrr ggggbbbb */ @@ -540,6 +540,8 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_ARGB555X v4l2_fourcc_be('A', 'R', '1', '5') /* 16 ARGB-5-5-5 BE */ #define V4L2_PIX_FMT_XRGB555X v4l2_fourcc_be('X', 'R', '1', '5') /* 16 XRGB-5-5-5 BE */ #define V4L2_PIX_FMT_RGB565X v4l2_fourcc('R', 'G', 'B', 'R') /* 16 RGB-5-6-5 BE */ + +/* RGB formats (3 or 4 bytes per pixel) */ #define V4L2_PIX_FMT_BGR666 v4l2_fourcc('B', 'G', 'R', 'H') /* 18 BGR-6-6-6 */ #define V4L2_PIX_FMT_BGR24 v4l2_fourcc('B', 'G', 'R', '3') /* 24 BGR-8-8-8 */ #define V4L2_PIX_FMT_RGB24 v4l2_fourcc('R', 'G', 'B', '3') /* 24 RGB-8-8-8 */ |