[Bug 756913] New: hlsdemux: fix race condition while changing bitrate and seeking

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=756913

            Bug ID: 756913
           Summary: hlsdemux: fix race condition while changing bitrate
                    and seeking
    Classification: Platform
           Product: GStreamer
           Version: 1.4.5
                OS: other
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: phmurphy at digisoft.tv
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

- Changed GST_M3U8_CLIENT_LOCK to a recursive mutex
  - This was needed as a race condition was present in
gst_hls_demux_change_playlist, while switching
    variant it was possible for a seek to occur because the mutex was unlocked.
This seek would fail at this point because
    client->current->endlist would not have been set to true yet. Changing
GST_M3U8_CLIENT_LOCK to a recursive mutex prevents
    a seek occurring while switching variant.
- This fix only applies to 1.4.5
- I understand that changing GST_M3U8_CLIENT_LOCK to a recursive mutex may not
be an ideal solution, so I am open to suggestions on a more appropriate
solution.

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