+#ifdef LV2_SUPPORT
+ /** Get a MIDI buffer translated into an LV2 MIDI buffer for use with plugins.
+ * The index here corresponds directly to MIDI buffer numbers (i.e. the index
+ * passed to get_midi), translation back and forth will happen as needed.
+ * If atom_type is 0 the returned buffer will be in the old event API
+ * format. Otherwise, atom_type must be the URID for atom:Sequence.
+ */
+ LV2_Evbuf* get_lv2_midi(bool input, size_t i, uint32_t atom_type);
+
+ /** Flush modified LV2 event output buffers back to Ardour buffers */
+ void flush_lv2_midi(bool input, size_t i);
+#endif
+
+#if defined VST_SUPPORT || defined LXVST_SUPPORT
+ VstEvents* get_vst_midi (size_t);
+#endif
+
+ void read_from(const BufferSet& in, framecnt_t nframes);
+ void read_from(const BufferSet& in, framecnt_t nframes, DataType);
+ void merge_from(const BufferSet& in, framecnt_t nframes);
+
+ template <typename BS, typename B>
+ class iterator_base {