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authorEzequiel Garcia <ezequiel@collabora.com>2019-03-28 14:07:04 -0400
committerMauro Carvalho Chehab <mchehab+samsung@kernel.org>2019-04-22 10:33:06 -0400
commitf44b969aa3cddabe86e9aff411889643298e8d59 (patch)
tree681cea20e3e60f1b1f89e94455d955ebfac86ace /include/media/v4l2-common.h
parent9fb10beb8a57f6fa9fdb592652f213df6b98600a (diff)
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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/v4l2-common.h')
-rw-r--r--include/media/v4l2-common.h33
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_ */