[gstreamer-bugs] [Bug 500653] New: reuse qos event in basesink

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gstreamer (core) | Ver: HEAD CVS
           Summary: reuse qos event in basesink
           Product: GStreamer
           Version: HEAD CVS
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gstreamer (core)
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: ensonic at sonicpulse.de
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Basesink creates a new qos event for each frame. It would be nice to reduce the
number of allocations during playtime. The attached patche does that.

I meassured with this pipeline:
MP_LOG_START=0.3 G_SLICE=always-malloc G_DEBUG=gc-friendly
LD_PRELOAD=libmempattern.so gst-launch-0.10 --gst-disable-registry-fork
videotestsrc num-buffers=50 ! xvimagesink

and got this result:
$ # before
$ wc -l /tmp/mp_use.log
35406 /tmp/mp_use.log
$ # after
$ wc -l /tmp/mp_use.log 
34777 /tmp/mp_use.log
$ # savings = 629


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