[gstreamer-bugs] [Bug 563574] v4l2src should capture in non-blocking mode

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: HEAD CVS

Stefan Kost (gstreamer, gtkdoc dev) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |ensonic at sonicpulse.de
           Severity|normal                      |enhancement




------- Comment #1 from Stefan Kost (gstreamer, gtkdoc dev)  2008-12-10 09:37 UTC -------
gst-plugins-good/sys/v4l2$ grep -C1 -Hn " open (" *.c
gstv4l2object.c-108-
gstv4l2object.c:109:            if ((fd = open (device, O_RDWR | O_NONBLOCK)) >
0 || errno == EBUSY) {
gstv4l2object.c-110-              if (fd > 0)
--
v4l2_calls.c-422-  v4l2object->video_fd =
v4l2_calls.c:423:      open (v4l2object->videodev, O_RDWR /* | O_NONBLOCK */ );
v4l2_calls.c-424-

So I removed the uncommented /* | O_NONBLOCK */ in v4l2_calls.c:423 and that
leads to:

0:00:00.241962456 16029  0x88d7058 WARN               v4l2src
v4l2src_calls.c:998:gst_v4l2src_grab_frame:<v4l2src0> problem grabbing frame 0
(ix=0), trials=50, pool-ct=3, buf.flags=0
0:00:00.242056393 16029  0x88d7058 WARN               v4l2src
v4l2src_calls.c:1006:gst_v4l2src_grab_frame:<v4l2src0> Non-blocking I/O has
been selected using O_NONBLOCK and no buffer was in the outgoing queue. device
/dev/video0

The commented O_NONBLOCK was added in
http://webcvs.freedesktop.org/gstreamer/gst-plugins-good/sys/v4l2/v4l2_calls.c?r1=1.23&r2=1.24
by alima saying "Just make few things more robust and also some identation."

No idea how much changes it would need to support it.


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