[Jack-Devel] JACK midi events lost on 64 bit machines
I have an application using JACK MIDI under Linux. It works perfectly on 32
bit machines, but on my new one, which is 64 bits, I get event loss all the
time.
I checked:
- Values coming from jack_ringbuffer_read, they are OK (valid 2-3 bytes
MIDI messages);
- midi_out_port and client, they are OK (non-null) and appearing on my
JACK port list.
Here is part of my code:
#define MidiMessageSize 3
jack_client_t* client;
jack_port_t* midi_out_port;
char current_message[MidiMessageSize];
jack_ringbuffer_t* midi_rb;
int process (jack_nframes_t nframes, void *arg) {
void* output_buffer = jack_port_get_buffer(midi_out_port, nframes);
jack_midi_clear_buffer(output_buffer);
int read_space = jack_ringbuffer_read_space(midi_rb);
if (read_space == 0) return 0;
int i;
for (i = 0; i < read_space; i += MidiMessageSize) {
jack_ringbuffer_read(midi_rb, current_message, MidiMessageSize);
jack_midi_event_write(output_buffer, i/MidiMessageSize,
(jack_midi_data_t*)current_message, MidiMessageSize);
if (jack_midi_get_lost_event_count(midi_out_port)) {
printf("Lost\n"); /* Never get here on 32 bit but always on 64 */
}
}
jack_ringbuffer_reset(midi_rb);
return 0;
}
What may be wrong?
Thanks,
--
Carlos Eduardo da Fonseca
1309135855.10077_0.ltw:2,a <BANLkTimresrnUho=ztKJ0vgqueKJ5enmmg at mail dot gmail dot com>