[Bug 667221] New: dvdspu: some optimizations

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=667221
  GStreamer | gst-plugins-bad | git

           Summary: dvdspu: some optimizations
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: rob at ti.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Detect invisible pixels, and skip gstspu_vobsub_blend_comp_buffers()
when there are only invisible pixels.  This significantly reduces the
CPU load in cases of DVDs which don't use the clip_rect to exclude
processing for parts of the screen where the video is visible.

patch attached

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