[Bug 783314] Playbin Repeat play / pause , video playback hangs

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=783314

--- Comment #7 from shakin at outlook.com <shakin at outlook.com> ---
(In reply to shakin at outlook.com from comment #6)
> Created attachment 353654 [details]
> backtrace_paused_2_playing_playback_hang
> 
> Sorry, previously  provides a playing-> paused state of the stacktrace, It
> seems  nothing unusual.
> 
> I snapshoted the paused-> playing stacktrace.
> 
> 1.Thread 43 in gst_amc_video_dec_loop() L1250 hold
> GST_VIDEO_DECODER_STREAM_LOCK(self)
> 
> then call sequence(see Thread 33,bt49 ~ bt1):
see Thread 33,bt49 ~ bt1 => see Thread 43,bt49 ~ bt1

> gstvideodecoder.c:3055 gst_video_decoder_finish_frame()      =>
> gstvideodecoder.c:3200 gst_video_decoder_clip_and_push_buf() =>
> ...                      
> gstpad.c:4457          gst_pad_push_data()                   =>
> gstpad.c:4205          gst_pad_chain_data_unchecked()        =>
> gstghostpad.c:127      gst_proxy_pad_chain_default()         =>
> gstpad.c:4576          gst_pad_push()                        =>
> gstpad.c:4457          gst_pad_push_data()                   =>
> ...
> gstpad.c:4205          gst_pad_chain_data_unchecked()        =>
> gstqueue.c:1228        gst_queue_chain_buffer_or_list() 
> 
> vqueue blocked for full.
> 
> 2.Thread 23 
> bt 5:gst_amc_video_dec_handle_frame() L2198 want
> GST_VIDEO_DECODER_STREAM_LOCK (self),but the thread 33 hold at this time.
> 
but the thread 33 hold at this time. => but the thread 43 hold at this time.

> 3.Thread 24
> bt 7: gst_queue_chain_buffer_or_list() L1228 block for full.
> aqueue blocked for full.
> 
> 4.Thread 45
> bt 7,
>  gstaudioringbuffer.c:1591 default_commit(),
>      diff = 10
>      segtotal = 10
> 
> diff == segtotal ,
> 
> blocked in wait_segment() L1364
> 
> 
> Above 1,2, this situation will lead to deadlock well?
> and can't understand why thread 45, default_commit will block.

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