public static extern void *av_tree_find(libavutil.AVTreeNode *root, void *key, global::System.IntPtr cmp, void **next);
public static extern void av_tree_destroy(libavutil.AVTreeNode *t);
public static extern void av_tree_enumerate(libavutil.AVTreeNode *t, void *opaque, global::System.IntPtr cmp, global::System.IntPtr enu);
public static extern void *av_tree_insert(ref libavutil.AVTreeNode *rootp, void *key, global::System.IntPtr cmp, ref libavutil.AVTreeNode *next);