[Bug 699447] New: v4l2: try to allocate new buffers with VIDIOC_CREATE_BUFS if needed

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=699447
  GStreamer | gst-plugins-good | git

           Summary: v4l2: try to allocate new buffers with
                    VIDIOC_CREATE_BUFS if needed
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-good
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: m.olbrich at pengutronix.de
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=243024)
 --> (https://bugzilla.gnome.org/attachment.cgi?id=243024)
patch

If max_buffers is 0 then an arbitrary number of buffers (currently 4) is
allocated. If this is not enough v4l2src starts copying buffers.
With this patch VIDIOC_CREATE_BUFS is used to allocate a new buffer. If
this fails v4l2src falls back to copying buffers.

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