bool MIDISequencer::GoToTime ( MIDIClockTime time_clk )
{
// temporarily disable the gui notifier
bool notifier_mode = false;
if ( state.notifier )
{
notifier_mode = state.notifier->GetEnable();
state.notifier->SetEnable ( false );
}
if ( time_clk < state.cur_clock || time_clk == 0 )
{
// start from zero if desired time is before where we are
for ( int i = 0; i < state.num_tracks; ++i )
{
state.track_state[i]->GoToZero();
}
state.iterator.GoToTime ( 0 );
state.cur_time_ms = 0.0;
state.cur_clock = 0;
// state.next_beat_time = state.multitrack->GetClksPerBeat();
state.next_beat_time =
state.multitrack->GetClksPerBeat()
* 4 / ( state.track_state[0]->timesig_denominator );
state.cur_beat = 0;
state.cur_measure = 0;
}
MIDIClockTime t = 0;
int trk;
MIDITimedBigMessage ev;
while (
GetNextEventTime ( &t )
&& t < time_clk
&& GetNextEvent ( &trk, &ev )
)
{
;
}
// examine all the events at this specific time
// and update the track states to reflect this time
ScanEventsAtThisTime();
// re-enable the gui notifier if it was enabled previously
if ( state.notifier )
{
state.notifier->SetEnable ( notifier_mode );
// cause a full gui refresh now
state.notifier->Notify ( this, MIDISequencerGUIEvent::GROUP_ALL );
}
return true;
}
void MIDISequencer::GoToZero()
{
// go to time zero
for ( int i = 0; i < num_tracks; ++i )
{
state.track_state[i]->GoToZero();
}
state.iterator.GoToTime ( 0 );
state.cur_time_ms = 0.0;
state.cur_clock = 0;
// state.next_beat_time = state.multitrack->GetClksPerBeat();
state.next_beat_time =
state.multitrack->GetClksPerBeat()
* 4 / ( state.track_state[0]->timesig_denominator );
// examine all the events at this specific time
// and update the track states to reflect this time
ScanEventsAtThisTime();
}
bool MIDISequencer::GoToMeasure( int measure, int beat )
{
// temporarily disable the gui notifier
bool notifier_mode=false;
if( state.notifier )
{
notifier_mode = state.notifier->GetEnable();
state.notifier->SetEnable(false);
}
if( measure < state.cur_measure || measure==0 )
{
for( int i=0; i<state.num_tracks; ++i )
{
state.track_state[i]->GoToZero();
}
state.iterator.GoToTime( 0 );
state.cur_time_ms = 0.0;
state.cur_clock = 0;
state.cur_beat = 0;
state.cur_measure = 0;
// state.next_beat_time = state.multitrack->GetClksPerBeat();
state.next_beat_time =
state.multitrack->GetClksPerBeat()
* 4 / (state.track_state[0]->timesig_denominator);
}
MIDIClockTime t=0;
int trk;
MIDITimedBigMessage ev;
// iterate thru all the events until cur-measure and cur_beat are
// where we want them.
while(
GetNextEventTime( &t )
&& GetNextEvent(&trk,&ev)
&& state.cur_measure<=measure
)
{
if( state.cur_measure==measure && state.cur_beat>=beat )
{
break;
}
}
// examine all the events at this specific time
// and update the track states to reflect this time
ScanEventsAtThisTime();
// re-enable the gui notifier if it was enabled previously
if( state.notifier )
{
state.notifier->SetEnable( notifier_mode );
// cause a full gui refresh now
state.notifier->Notify( this, MIDISequencerGUIEvent::GROUP_ALL );
}
// return true if we actually found the measure requested
return state.cur_measure == measure && state.cur_beat == beat;
}
