[Bug 740357] gstbasetextoverlay: emit signal when text chain is waiting for video buffer

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=740357
  GStreamer | gst-plugins-base | git

--- Comment #1 from Andreas Frisch <fraxinas at opendreambox.org> 2014-11-19 12:17:39 UTC ---
Created an attachment (id=290978)
 View: https://bugzilla.gnome.org/attachment.cgi?id=290978
 Review: https://bugzilla.gnome.org/review?bug=740357&attachment=290978

gstbasetextoverlay: emit signal when text chain is waiting for video buffer,
refs bug #740357

emit "wait-text" signal before gst_base_text_overlay_text_chain goes into cond
wait for a video buffer

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