[Bug 772841] udpsrc: high CPU usage at high packet rate

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=772841

--- Comment #36 from Mathieu Duponchelle <mduponchelle1 at gmail.com> ---
Created attachment 369368
  --> https://bugzilla.gnome.org/attachment.cgi?id=369368&action=edit
udpsrc: switch to using a buffer pool

This exposes a new property, mtu, which is used to determine the
initial size of buffers from the buffer pool. If received data
exceeds this, the element gracefully handles that in a manner similar
to what we had previously: a large memory gets filled and reallocated
at the next call to "fill".

The default size is set to 1500, which should cover most use cases.

With contributions from Mathieu Duponchelle <mathieu at centricular.com>

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