linuxaudio.org

Am 21.11.2012 13:24, schrieb SxDx:

quoted text
> ----- Original Message -----

>> From: "Shani Hadiyanto Pribadi"

>> jack_midi_event_get(&in_event, midi_buf, event_index);

>> if ((*(in_event.buffer)&  0xf0) == 0x90) // Segfault happens here, on

>> boolean mask operation

>> {

>>      _note = *(in_event.buffer + 1);

>> }

> jack_midi_event_get may return ENODATA

> as explained in {wherever}/include/jack/midiport.h

> don't access in_event in that case, there is no data

> _______________________________________________

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]);

         }

     }

}
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