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[media] videodev2.h: add V4L2_FIELD_HAS_T_OR_B macro

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Add a macro to test if the field consists of a single top
or bottom field. Anyone who needs to work with fields as opposed to
frame will need this.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Hans Verkuil 2014-02-26 18:22:05 -03:00 committed by Mauro Carvalho Chehab
parent 72be89c84c
commit e34c4db8fe
1 changed files with 4 additions and 0 deletions
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4
include/uapi/linux/videodev2.h
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@ -124,6 +124,10 @@ enum v4l2_field {
(field) == V4L2_FIELD_INTERLACED_BT ||\
(field) == V4L2_FIELD_SEQ_TB ||\
(field) == V4L2_FIELD_SEQ_BT)
#define V4L2_FIELD_HAS_T_OR_B(field) \
((field) == V4L2_FIELD_BOTTOM ||\
(field) == V4L2_FIELD_TOP ||\
(field) == V4L2_FIELD_ALTERNATE)
enum v4l2_buf_type {
V4L2_BUF_TYPE_VIDEO_CAPTURE = 1,