-void E_(I420_R5G5B5) ( vout_thread_t *, picture_t *, picture_t * );
-void E_(I420_R5G6B5) ( vout_thread_t *, picture_t *, picture_t * );
-void E_(I420_A8R8G8B8) ( vout_thread_t *, picture_t *, picture_t * );
-void E_(I420_R8G8B8A8) ( vout_thread_t *, picture_t *, picture_t * );
-void E_(I420_B8G8R8A8) ( vout_thread_t *, picture_t *, picture_t * );
-void E_(I420_A8B8G8R8) ( vout_thread_t *, picture_t *, picture_t * );
+void I420_R5G5B5 ( filter_t *, picture_t *, picture_t * );
+void I420_R5G6B5 ( filter_t *, picture_t *, picture_t * );
+void I420_A8R8G8B8 ( filter_t *, picture_t *, picture_t * );
+void I420_R8G8B8A8 ( filter_t *, picture_t *, picture_t * );
+void I420_B8G8R8A8 ( filter_t *, picture_t *, picture_t * );
+void I420_A8B8G8R8 ( filter_t *, picture_t *, picture_t * );
+static picture_t *I420_R5G5B5_Filter ( filter_t *, picture_t * );
+static picture_t *I420_R5G6B5_Filter ( filter_t *, picture_t * );
+static picture_t *I420_A8R8G8B8_Filter ( filter_t *, picture_t * );
+static picture_t *I420_R8G8B8A8_Filter ( filter_t *, picture_t * );
+static picture_t *I420_B8G8R8A8_Filter ( filter_t *, picture_t * );
+static picture_t *I420_A8B8G8R8_Filter ( filter_t *, picture_t * );