[Bug 754183] New: rtpbuffer: avoid ensure buffers when setting extension data

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=754183

            Bug ID: 754183
           Summary: rtpbuffer: avoid ensure buffers when setting extension
                    data
    Classification: Platform
           Product: GStreamer
           Version: 1.5.2
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: mparisdiaz at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 310102
  --> https://bugzilla.gnome.org/attachment.cgi?id=310102&action=edit
rtpbuffer: avoid ensure buffers when setting extension data

gst_rtp_buffer_set_extension_data function is supposed to be called after
mapping the GstRTPBuffer, so we can avoid ensure buffers which supposes too
cost.
Instruction per call:
  Ensuring buffers: 4237
  Without ensuring buffers: 864
  Improvement: 1 - 864/4237 = 0.796

Callgrind graphs are also attached.

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