[Bug 768794] ion: DMA Buf allocator based on ion

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=768794

--- Comment #19 from kevin <kevinbing.song at gmail.com> ---
After changed dmabuf allocator to sub-classable. Below function need changed
too. Below function needn't allocate GstFdMemory, it should use received
GstMemory from input parameter. And the user of the function need modify. such
as v4l2 element, kmssink.

GstMemory *
gst_fd_allocator_alloc (GstAllocator * allocator, gint fd, gsize size,
    GstFdMemoryFlags flags)
{
#ifdef HAVE_MMAP
  GstFdMemory *mem;

  g_return_val_if_fail (GST_IS_FD_ALLOCATOR (allocator), NULL);

  mem = g_slice_new0 (GstFdMemory);
  gst_memory_init (GST_MEMORY_CAST (mem), 0, GST_ALLOCATOR_CAST (allocator),
      NULL, size, 0, 0, size);
}

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