[gstreamer-bugs] [Bug 583890] v4l2: should use pad_alloc

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-good | Ver: git




------- Comment #1 from Stefan Kost (gstreamer, gtkdoc dev)  2009-05-26 13:41 UTC -------
Created an attachment (id=135383)
 --> (http://bugzilla.gnome.org/attachment.cgi?id=135383&action=view)
implement pad_alloc_buffer usage

For testing, please run:
GST_DEBUG="v4l2*:3" gst-launch-0.10 2>&1 v4l2src always-copy=false !
"video/x-raw-yuv,width=640,height=480" ! xvimagesink

if you get this, then the driver does not support userspace pointers when
streaming :/
v4l2src_calls.c:1437:gst_v4l2src_capture_init:<v4l2src0> allocate buffers via
mmap
v4l2src_calls.c:1459:gst_v4l2src_capture_init:<v4l2src0> capturing buffers via
streaming

If you see this, it works
v4l2src_calls.c:1450:gst_v4l2src_capture_init:<v4l2src0> allocate buffers via
pad_alloc
v4l2src_calls.c:1460:gst_v4l2src_capture_init:<v4l2src0> capturing buffers via
streaming

Another test is to use GST_DEBUG="xv*:5" and grep for "slow". It should not
appear anymore when userspace pointer are in use.


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