Add a macro that returns true if the given field type is 'sequential',
that is, the data is transmitted, or exists in memory, as all top field
lines followed by all bottom field lines, or vice-versa.
Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
include/uapi/linux/videodev2.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 600877b..408ee96 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -126,6 +126,10 @@ enum v4l2_field {
(field) == V4L2_FIELD_INTERLACED_BT ||\
(field) == V4L2_FIELD_SEQ_TB ||\
(field) == V4L2_FIELD_SEQ_BT)
+#define V4L2_FIELD_IS_SEQUENTIAL(field) \
+ ((field) == V4L2_FIELD_SEQ_TB ||\
+ (field) == V4L2_FIELD_SEQ_BT ||\
+ (field) == V4L2_FIELD_ALTERNATE)
#define V4L2_FIELD_HAS_T_OR_B(field) \
((field) == V4L2_FIELD_BOTTOM ||\
(field) == V4L2_FIELD_TOP ||\
--
2.7.4
