[Bug 700411] New: [dmabuf allocator]: optimize map/unmap call

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=700411
  GStreamer | gst-plugins-base | 1.x

           Summary: [dmabuf allocator]: optimize map/unmap call
    Classification: Platform
           Product: GStreamer
           Version: 1.x
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-base
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: benjamin.gaignard at gmail.com
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=244354)
 View: https://bugzilla.gnome.org/attachment.cgi?id=244354
 Review: https://bugzilla.gnome.org/review?bug=700411&attachment=244354

optimize dmabuf map/unmap

Simplify dmabuf allocator to avoid call mmap and munmap after each
gst_buffer_{map/unmap} request.

Memory is mmap at the first call of gst_buffer_map and is unmap when the buffer
released.

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