void JVlibForm::on_System_PauseMidi_button_toggled(bool checked)
{
unsigned int current_tick;
if (checked) {
stopPlayer();
if (seqTimer->isActive()) {
disconnect(JVlibForm::seqTimer, SIGNAL(timeout()), this, SLOT(tickDisplay()));
seqTimer->stop();
}
snd_seq_get_queue_status(seq, queue, status);
current_tick = snd_seq_queue_status_get_tick_time(status);
snd_seq_stop_queue(seq,queue,NULL);
snd_seq_drain_output(seq);
stop_sound();
disconnect_port();
System_PauseMidi_button->setText("Resume");
}
else {
connect_port();
snd_seq_continue_queue(seq, queue, NULL);
snd_seq_drain_output(seq);
snd_seq_get_queue_status(seq, queue, status);
current_tick = snd_seq_queue_status_get_tick_time(status);
System_PauseMidi_button->setText("Pause");
connect(JVlibForm::seqTimer, SIGNAL(timeout()), this, SLOT(tickDisplay()));
startPlayer(current_tick);
seqTimer->start(100);
}
} // end on_System_PauseMidi_button_toggled
static guint32
get_current_tick (void)
{
snd_seq_queue_status_t *status;
snd_seq_queue_status_alloca (&status);
snd_seq_get_queue_status (seq, queue_id, status);
return snd_seq_queue_status_get_tick_time (status);
}
static unsigned int get_tick(void)
{
snd_seq_queue_status_t * status;
int result;
snd_seq_queue_status_alloca(&status);
result = snd_seq_get_queue_status(seq, seq_queue, status);
if (result < 0) {
fprintf(stderr, "ALSA snd_seq_get_queue_status err %d\n", result);
return 0;
}
return (unsigned int) snd_seq_queue_status_get_tick_time(status);
}
void JVlibForm::tickDisplay() {
// set timestamp display
snd_seq_get_queue_status(seq, queue, status);
unsigned int current_tick = snd_seq_queue_status_get_tick_time(status);
System_MIDI_progressBar->blockSignals(true);
System_MIDI_progressBar->setValue(current_tick);
System_MIDI_progressBar->blockSignals(false);
// set time label
double new_seconds = static_cast<double>(current_tick)/all_events.back().tick;
new_seconds *= song_length_seconds;
MIDI_time_display->setText(QString::number(static_cast<int>(new_seconds)/60).rightJustified(2,'0')+
":"+QString::number(static_cast<int>(new_seconds)%60).rightJustified(2,'0'));
if (current_tick >= all_events.back().tick) { // end of song
sleep(1);
System_PlayMidi_button->setChecked(false);
return;
}
while (all_events[event_num].tick<current_tick)
event_num++;
} // end tickDisplay
