[LAD] Need help with LV2 midi events.

Hello list, I never get a valid event iterator with lv2_event_is_valid(). Can somebody tell me why please? Thanks and regards #include <iostream> #include <ctime> #include <lv2plugin.hpp> #include <lv2_event_helpers.h> #include <sys/time.h> using namespace LV2; using namespace std; class Delay : public Plugin<Delay, URIMap<true>, EventRef<true> > { public: Delay(double rate) : Plugin<Delay, URIMap<true>, EventRef<true> >(7), m_midi_type(uri_to_id(LV2_EVENT_URI, "http://lv2plug.in/ns/ext/midi#MidiEvent")) { } void run(uint32_t nframes) { // initialise event buffer iterators LV2_Event_Buffer* inbuf = p<LV2_Event_Buffer>(*p(6)); LV2_Event_Iterator in; lv2_event_begin(&in, inbuf); while (lv2_event_is_valid(&in)) { cout << "event\n"; uint8_t* data; LV2_Event* ev = lv2_event_get(&in, &data); lv2_event_increment(&in); if (ev->type == 0) event_unref(ev); if (ev->type == m_midi_type) { gettimeofday(&m_now,NULL); cout << ev->frames << "\n"; m_last = m_now; } } } protected: uint32_t m_midi_type; timeval m_now, m_last; }; static int _ = Delay::register_class("http://uli-plugins.sourceforge.net/lv2/mtcsimpl…lay");