[Bug 773165] New: add gst_video_decoder_allocate_output_frame_full to pass a custom GstBufferPoolAcquireParams

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=773165

            Bug ID: 773165
           Summary: add gst_video_decoder_allocate_output_frame_full to
                    pass a custom GstBufferPoolAcquireParams
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: Normal
         Component: gst-plugins-base
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: julien.isorce at gmail.com
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

It add a 3th argument GstBufferPoolAcquireParams to pass to
gst_buffer_pool_acquire_buffer.

If a user subclass GstBufferPoolAcquireParams, this allow to pass an updated
param to the underlying buffer pool at each
gst_video_decoder_allocate_output_frame_full call.

I need that in gstvaapidecode to pass the current "surface" (not exaclty but to
simplify) to the pool, when it calls
"gst_video_decoder_allocate_output_frame(_full)"

Patch will follow.

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