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| author | Sakari Ailus <sakari.ailus@iki.fi> | 2012-09-15 12:51:47 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2012-12-21 13:53:43 +0100 |
| commit | abd23295648a9e3ae72a806e70a510d3dcd8b374 (patch) | |
| tree | ee7c891cca5336c934c55daa6ddfcbca52e7729a | |
| parent | [media] v4l: Define video buffer flags for timestamp types (diff) | |
| download | linux-abd23295648a9e3ae72a806e70a510d3dcd8b374.tar.xz linux-abd23295648a9e3ae72a806e70a510d3dcd8b374.zip | |
[media] v4l: Helper function for obtaining timestamps
v4l2_get_timestamp() produces a monotonic timestamp but unlike
ktime_get_ts(), it uses struct timeval instead of struct timespec, saving
the drivers the conversion job when getting timestamps for v4l2_buffer's
timestamp field.
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
| -rw-r--r-- | drivers/media/v4l2-core/v4l2-common.c | 10 | ||||
| -rw-r--r-- | include/media/v4l2-common.h | 2 |
2 files changed, 12 insertions, 0 deletions
diff --git a/drivers/media/v4l2-core/v4l2-common.c b/drivers/media/v4l2-core/v4l2-common.c index 380ddd89fa4c..614316f9b7a4 100644 --- a/drivers/media/v4l2-core/v4l2-common.c +++ b/drivers/media/v4l2-core/v4l2-common.c @@ -978,3 +978,13 @@ const struct v4l2_frmsize_discrete *v4l2_find_nearest_format( return best; } EXPORT_SYMBOL_GPL(v4l2_find_nearest_format); + +void v4l2_get_timestamp(struct timeval *tv) +{ + struct timespec ts; + + ktime_get_ts(&ts); + tv->tv_sec = ts.tv_sec; + tv->tv_usec = ts.tv_nsec / NSEC_PER_USEC; +} +EXPORT_SYMBOL_GPL(v4l2_get_timestamp); diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 1a0b2db4c5d3..ec7c9c00b256 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -225,4 +225,6 @@ bool v4l2_detect_gtf(unsigned frame_height, unsigned hfreq, unsigned vsync, struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait); +void v4l2_get_timestamp(struct timeval *tv); + #endif /* V4L2_COMMON_H_ */ |