[Bug 750241] [API] GstBaseSrc: add support for buffer list

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=750241

Tim-Philipp Müller <t.i.m at zen.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED
   Target Milestone|git master                  |1.13.1

--- Comment #16 from Tim-Philipp Müller <t.i.m at zen.co.uk> ---
commit 18fe36a286d3dd806cfe645d643d9cdd8ea19237 (HEAD -> master, origin/master,
origin/HEAD)
Author: Tim-Philipp Müller <tim at centricular.com>
Date:   Wed Aug 30 13:03:28 2017 +0100

    basesrc: add buffer list support

    Add a gst_base_src_submit_buffer_list() function that allows subclasses
    to produce a bufferlist containing multiple buffers in the ::create()
    function. The buffers in the buffer list will then also be pushed out
    in one go as a GstBufferList. This can reduce push overhead
    significantly for sources with packetised inputs (such as udpsrc)
    in high-throughput scenarios.

    The _submit_buffer_list() approach was chosen because it is fairly
    straight-forward, backwards-compatible, bindings-friendly (as opposed
    to e.g. making the create function return a mini object instead),
    and it allows the subclass maximum control: the subclass can decide
    dynamically at runtime whether to return a list or a single buffer
    (which would be messier if we added a create_list virtual method).

    https://bugzilla.gnome.org/show_bug.cgi?id=750241

commit 880c573e8df17185f0773a2bbe412242e870907b
Author: Tim-Philipp Müller <tim at centricular.com>
Date:   Thu Aug 31 01:18:28 2017 +0100

    basesrc: minor code readability improvement

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