GstMmapBuffer     472 plugins/elements/gstfilesrc.c #define GST_MMAP_BUFFER(obj)     (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MMAP_BUFFER, GstMmapBuffer))
GstMmapBuffer     507 plugins/elements/gstfilesrc.c       sizeof (GstMmapBuffer),