[Bug 721548] New: pad: Add API to wakeup pad blocks

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=721548
  GStreamer | gstreamer (core) | git

           Summary: pad: Add API to wakeup pad blocks
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: slomo at coaxion.net
         QAContact: gstreamer-bugs at lists.freedesktop.org
                CC: pedro at pedrocr.net, wim.taymans at gmail.com,
                    slomo at coaxion.net, todd at agulnick.com
     GNOME version: ---


+++ This bug was initially created as a clone of Bug #721289 +++

See the original bug for a use case. API should probably be something like

void gst_pad_unblock(pad, probe_return);

Which then broadcasts the GCond and stores the probe_return somewhere. What
should then happen is:

a) PROBE_OK
- Run all probes another time

b) PROBE_PASS
- Do as if one of the probes had returned PASS

c) PROBE_DROP
- Do as if one of the probes had returned DROP

d) PROBE_REMOVE
- Nothing

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