[Bug 787290] omxvideodec: Stuck after several seeks on Raspberry Pi3

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=787290

--- Comment #12 from Nicolas Dufresne (stormer) <nicolas at ndufresne.ca> ---
(In reply to Yuji Kuwabara from comment #10)
> Thanks for comments.
> 
> --------------------------------
> This is not correct, the FLUSH_START event need to be propagated before you
> can take the stream lock. That's why the base class will call flush on
> FLUSH_STOP event, which hold the stream-lock.
> --------------------------------
> 
> In my modification, GST_EVENT_FLUSH_START event is propagated before LOCK
> and FLUSH. 
> Similar pattern is seen in gst_rtp_rtx_send_sink_event().
> ---------------------------------
>     case GST_EVENT_FLUSH_START:
>       gst_pad_push_event (rtx->srcpad, event);
>       gst_rtp_rtx_send_set_flushing (rtx, TRUE);
>       gst_pad_pause_task (rtx->srcpad);
>       return TRUE;
> ---------------------------------
> LOCK is used in gst_rtp_rtx_send_set_flushing()

This is not similar pattern since it does not take the stream lock. It only
triggers to stop.

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