[Bug 750252] New: audiointerleave: Crash when channel-positions-from-input=1 and channel-positions unset

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=750252

            Bug ID: 750252
           Summary: audiointerleave: Crash when
                    channel-positions-from-input=1 and channel-positions
                    unset
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: nicolas.dufresne at collabora.co.uk
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Audio interleave crash if channel-positions-from-input is set to FALSE and
channel-positions is not set. The reason of the crash is that there is no
default positionning, which lead to channels=0, bps=0, hence an allocation of
size 0 and call to gst_buffer_map() to fail. Additionnally, gst_buffer_map()
calles are systematically unchecked (even the one from the outside world.

To reproduce:
gst-launch-1.0 pulsesrc ! audiointerleave channel-positions-from-input=0 !
pulsesink

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