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| author | Ezequiel Garcia <ezequiel@collabora.com> | 2019-03-28 21:07:04 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab+samsung@kernel.org> | 2019-04-22 17:33:06 +0300 |
| commit | f44b969aa3cddabe86e9aff411889643298e8d59 (patch) | |
| tree | 681cea20e3e60f1b1f89e94455d955ebfac86ace /include/media | |
| parent | 9fb10beb8a57f6fa9fdb592652f213df6b98600a (diff) | |
| download | linux-f44b969aa3cddabe86e9aff411889643298e8d59.tar.xz | |
media: Introduce helpers to fill pixel format structs
Add two new API helpers, v4l2_fill_pixfmt and v4l2_fill_pixfmt_mp,
to be used by drivers to calculate plane sizes and bytes per lines.
Note that driver-specific padding and alignment are not
taken into account, and must be done by drivers using this API.
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-common.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 2b93cb281fa5..0a41bbecf3d3 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -392,4 +392,37 @@ int v4l2_s_parm_cap(struct video_device *vdev, ((u64)(a).numerator * (b).denominator OP \ (u64)(b).numerator * (a).denominator) +/* ------------------------------------------------------------------------- */ + +/* Pixel format and FourCC helpers */ + +/** + * struct v4l2_format_info - information about a V4L2 format + * @format: 4CC format identifier (V4L2_PIX_FMT_*) + * @mem_planes: Number of memory planes, which includes the alpha plane (1 to 4). + * @comp_planes: Number of component planes, which includes the alpha plane (1 to 4). + * @bpp: Array of per-plane bytes per pixel + * @hdiv: Horizontal chroma subsampling factor + * @vdiv: Vertical chroma subsampling factor + * @block_w: Per-plane macroblock pixel width (optional) + * @block_h: Per-plane macroblock pixel height (optional) + */ +struct v4l2_format_info { + u32 format; + u8 mem_planes; + u8 comp_planes; + u8 bpp[4]; + u8 hdiv; + u8 vdiv; + u8 block_w[4]; + u8 block_h[4]; +}; + +const struct v4l2_format_info *v4l2_format_info(u32 format); + +int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, int pixelformat, + int width, int height); +int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, int pixelformat, + int width, int height); + #endif /* V4L2_COMMON_H_ */ |