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| author |   mglocker <mglocker@openbsd.org> | 2010-07-19 08:59:38 +0000 |
|---|---|---|
| committer | mglocker <mglocker@openbsd.org> | 2010-07-19 08:59:38 +0000 |
| commit | b29d3e215f1ede2c3fcbc36e4a86461ebd6cc2c2 (patch) | |
| tree | 3b690134bd0c231fbc3e2994b220877b4adae7a4 | |
| parent | * don't round blocksize to multiples of 16; can cause problems when (diff) | |
| download | wireguard-openbsd-b29d3e215f1ede2c3fcbc36e4a86461ebd6cc2c2.tar.xz wireguard-openbsd-b29d3e215f1ede2c3fcbc36e4a86461ebd6cc2c2.zip | |
Document the recently introduced select(2) / poll(2) support for video(4).
| -rw-r--r-- | share/man/man4/video.4 | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/share/man/man4/video.4 b/share/man/man4/video.4 index 6c62d6c6b02..941f1d51340 100644 --- a/share/man/man4/video.4 +++ b/share/man/man4/video.4 @@ -1,4 +1,4 @@ -.\" $OpenBSD: video.4,v 1.6 2010/04/28 05:16:17 mglocker Exp $ +.\" $OpenBSD: video.4,v 1.7 2010/07/19 08:59:38 mglocker Exp $ .\" .\" Copyright (c) 2008 Marcus Glocker <mglocker@openbsd.org> .\" @@ -14,7 +14,7 @@ .\" ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF .\" OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. .\" -.Dd $Mdocdate: April 28 2010 $ +.Dd $Mdocdate: July 19 2010 $ .Dt VIDEO 4 .Os .Sh NAME @@ -249,6 +249,13 @@ When finished stop the video stream via the .Xr close 2 system call. .El +.Pp +The +.Xr select 2 +and +.Xr poll 2 +system calls are supported for this access type. +They will signal when a frame is ready for reading without blocking. .Sh MMAP Video data can be accessed via the .Xr mmap 2 @@ -284,6 +291,14 @@ Process video data and start over again with step 6. .It When finished stop the video stream via the VIDIOC_STREAMOFF ioctl command. .El +.Pp +The +.Xr select 2 +and +.Xr poll 2 +system calls are supported for this access type. +They will signal when at least one frame is ready for dequeuing, +allowing to call the VIDIOC_DQBUF ioctl command without blocking. .Sh FILES .Bl -tag -width /dev/video -compact .It Pa /dev/video |