[Bug 721666] videodecoder: push newsegment earlier for reverse playback

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=721666
  GStreamer | gst-plugins-base | unspecified

--- Comment #1 from Thiago Sousa Santos <thiago.sousa.santos at collabora.co.uk> 2014-01-07 00:09:48 UTC ---
Created an attachment (id=265488)
 View: https://bugzilla.gnome.org/attachment.cgi?id=265488
 Review: https://bugzilla.gnome.org/review?bug=721666&attachment=265488

videodecoder: push newsegment earlier for reverse playback

As events are 'attached' to video frames in videodecoder, when doing
reverse playback the new segment event will be attached to the
first frame. And this frame is pushed last, so a few frames are
pushed before a new segment.

To prevent this, iterate over the list of pending frame events and push
the new segment event before processing the buffers.

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