Adds two helper macros:
Add a macro that returns true if the given field type is 'sequential',
that is a full frame is transmitted, or exists in memory, as all top
field lines followed by all bottom field lines, or vice-versa.
Add a macro that returns true if the given field type is 'interlaced',
that is a full frame is transmitted, or exists in memory, as top field
lines interlaced with bottom field lines.
Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
Changes since v1:
- add the complement macro V4L2_FIELD_IS_INTERLACED
- remove V4L2_FIELD_ALTERNATE from V4L2_FIELD_IS_SEQUENTIAL macro.
- moved new macros past end of existing V4L2_FIELD_HAS_* macros.
---
include/uapi/linux/videodev2.h | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 600877b..d4e12f4 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -130,6 +130,13 @@ enum v4l2_field {
((field) == V4L2_FIELD_BOTTOM ||\
(field) == V4L2_FIELD_TOP ||\
(field) == V4L2_FIELD_ALTERNATE)
+#define V4L2_FIELD_IS_INTERLACED(field) \
+ ((field) == V4L2_FIELD_INTERLACED ||\
+ (field) == V4L2_FIELD_INTERLACED_TB ||\
+ (field) == V4L2_FIELD_INTERLACED_BT)
+#define V4L2_FIELD_IS_SEQUENTIAL(field) \
+ ((field) == V4L2_FIELD_SEQ_TB ||\
+ (field) == V4L2_FIELD_SEQ_BT)
enum v4l2_buf_type {
V4L2_BUF_TYPE_VIDEO_CAPTURE = 1,
--
2.7.4
