[gstreamer-bugs] [Bug 571299] New: [appsink] Handoff callback API

[GStreamer (bugzilla.gnome.org)]

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  GStreamer | gst-plugins-base | Ver: git
           Summary: [appsink] Handoff callback API
           Product: GStreamer
           Version: git
          Platform: Other
        OS/Version: All
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.sourceforge.net
        ReportedBy: martin.samuelsson at axis.com
         QAContact: gstreamer-bugs at lists.sourceforge.net
     GNOME version: Unspecified
   GNOME milestone: Unspecified


Using the new-buffer signal has a substantial impact on performance when having
streams with new buffers every 30th millisecond. The second possibility,
polling for new buffers is not always desired. Having the render function run a
callback, adds a third way to use appsink and can be used where the two others
are not suitable. This makes appsink more flexible, as the documentation
statement: "Appsink is a sink plugin that supports many different methods for
making the application get a handle on the GStreamer data in a pipeline."
suggests it should be.

The attached patch implements such a callback with addition of a set function
to the API.


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