Re: [LAD] Segfault when trying to dereference __midi_event.buffer (c++ newbie question)

Am 21.11.2012 13:24, schrieb SxDx: here is how we access jack_midi in data. // ----- jack process callback for the midi input void MidiControllerList::compute_midi_in(void* midi_input_port_buf) { jack_midi_event_t in_event; jack_nframes_t event_count = jack_midi_get_event_count(midi_input_port_buf); unsigned int i; for (i = 0; i < event_count; i++) { jack_midi_event_get(&in_event, midi_input_port_buf, i); if ((in_event.buffer[0] & 0xf0) == 0xc0) { // program change on any midi channel gx_system::atomic_set(&program_change, in_event.buffer[1]); pgm_chg(); } else if ((in_event.buffer[0] & 0xf0) == 0xb0) { // controller set_ctr_val(in_event.buffer[1], in_event.buffer[2]); } } }