[PATCH 3/9] media: v4l2: Introduce compressed pixel encoding definition and helper

Paul Kocialkowski
2023-03-24T15:12:52Z

Some pixel formats (such as JPEG) have their data compressed and
encoded in a specific way, which is not directly YUV, RGB or Bayer.

Add a new definition and helper for compressed pixel encoding to
represent this situation.

Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
---
include/media/v4l2-common.h | 7 +++++++
1 file changed, 7 insertions(+)

diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h
index 1bdaea248089..37554bc10e2a 100644
--- a/include/media/v4l2-common.h
+++ b/include/media/v4l2-common.h
@@ -465,12 +465,14 @@ int v4l2_s_parm_cap(struct video_device *vdev,
* @V4L2_PIXEL_ENC_YUV: Pixel encoding is YUV
* @V4L2_PIXEL_ENC_RGB: Pixel encoding is RGB
* @V4L2_PIXEL_ENC_BAYER: Pixel encoding is Bayer
+ * @V4L2_PIXEL_ENC_COMPRESSED: Pixel encoding is compressed
*/
enum v4l2_pixel_encoding {
V4L2_PIXEL_ENC_UNKNOWN = 0,
V4L2_PIXEL_ENC_YUV = 1,
V4L2_PIXEL_ENC_RGB = 2,
V4L2_PIXEL_ENC_BAYER = 3,
+ V4L2_PIXEL_ENC_COMPRESSED = 4,
};

/**
@@ -512,6 +514,11 @@ static inline bool v4l2_is_format_bayer(const struct v4l2_format_info *f)
return f && f->pixel_enc == V4L2_PIXEL_ENC_BAYER;
}

+static inline bool v4l2_is_format_compressed(const struct v4l2_format_info *f)
+{
+ return f && f->pixel_enc == V4L2_PIXEL_ENC_COMPRESSED;
+}
+
const struct v4l2_format_info *v4l2_format_info(u32 format);
void v4l2_apply_frmsize_constraints(u32 *width, u32 *height,
const struct v4l2_frmsize_stepwise *frmsize);
--
2.39.2