[Bug 760822] New: audiobasesink: consuming too much data after EOS and seek back to 0

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=760822

            Bug ID: 760822
           Summary: audiobasesink: consuming too much data after EOS and
                    seek back to 0
    Classification: Platform
           Product: GStreamer
           Version: 0.10.x
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: awabik at opera.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Reproduction steps:

- have a sink working in a push mode
- play some content till EOS
- after EOS, leave the pipeline in playing state for some time (a minute will
do good)
- pause the pipeline,
- flushing seek to 0
- unpause the pipeline

Observed effects (bug):
- the audio sink consumes all data that is provided to it immediately,
- if a queue is put before the sink, it will not fill
- if a queue is put before the *video* sink, and the queue before audio sink,
and the application unpauses only when both queues fill, it will never happen.

I will try to write a minimized testcase.

The root cause of the problem seems to be handling of the EOS event in
audiobasesink. It calls gst_audio_base_sink_drain(), but does not call
gst_audio_ring_buffer_pause(). Adding gst_audio_ring_buffer_pause() fixes the
problem.

If the sink works in a pull mode, and gst_pad_pull_range() returns EOS, then
the bug should not reproduce - then gst_audio_ring_buffer_pause() is called
after draining the sink.

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