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[media] v4l: Add metadata buffer type and format

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The metadata buffer type is used to transfer metadata between userspace
and kernelspace through a V4L2 buffers queue. It comes with a new
metadata capture capability and format description.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Tested-by: Guennadi Liakhovetski <guennadi.liakhovetski@intel.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
[hans.verkuil@cisco.com: removed left-over 'experimental' note]
[hans.verkuil@cisco.com: add newline after _v4l2-meta-format label]

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Laurent Pinchart
2016-04-12 19:40:46 -03:00
committed by Mauro Carvalho Chehab
parent 3e9a0e0bfa
commit fb9ffa6a7f
12 changed files with 164 additions and 6 deletions
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13
include/uapi/linux/videodev2.h
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@@ -143,6 +143,7 @@ enum v4l2_buf_type {
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE = 10,
V4L2_BUF_TYPE_SDR_CAPTURE = 11,
V4L2_BUF_TYPE_SDR_OUTPUT = 12,
V4L2_BUF_TYPE_META_CAPTURE = 13,
/* Deprecated, do not use */
V4L2_BUF_TYPE_PRIVATE = 0x80,
};
@@ -451,6 +452,7 @@ struct v4l2_capability {
#define V4L2_CAP_SDR_CAPTURE 0x00100000 /* Is a SDR capture device */
#define V4L2_CAP_EXT_PIX_FORMAT 0x00200000 /* Supports the extended pixel format */
#define V4L2_CAP_SDR_OUTPUT 0x00400000 /* Is a SDR output device */
#define V4L2_CAP_META_CAPTURE 0x00800000 /* Is a metadata capture device */
#define V4L2_CAP_READWRITE 0x01000000 /* read/write systemcalls */
#define V4L2_CAP_ASYNCIO 0x02000000 /* async I/O */
@@ -2085,6 +2087,16 @@ struct v4l2_sdr_format {
__u8 reserved[24];
} __attribute__ ((packed));
/**
* struct v4l2_meta_format - metadata format definition
* @dataformat: little endian four character code (fourcc)
* @buffersize: maximum size in bytes required for data
*/
struct v4l2_meta_format {
__u32 dataformat;
__u32 buffersize;
} __attribute__ ((packed));
/**
* struct v4l2_format - stream data format
* @type: enum v4l2_buf_type; type of the data stream
@@ -2104,6 +2116,7 @@ struct v4l2_format {
struct v4l2_vbi_format vbi; /* V4L2_BUF_TYPE_VBI_CAPTURE */
struct v4l2_sliced_vbi_format sliced; /* V4L2_BUF_TYPE_SLICED_VBI_CAPTURE */
struct v4l2_sdr_format sdr; /* V4L2_BUF_TYPE_SDR_CAPTURE */
struct v4l2_meta_format meta; /* V4L2_BUF_TYPE_META_CAPTURE */
__u8 raw_data[200]; /* user-defined */
} fmt;
};