本文整理汇总了C++中MIDITimedBigMessage::IsNoOp方法的典型用法代码示例。如果您正苦于以下问题：C++ MIDITimedBigMessage::IsNoOp方法的具体用法？C++ MIDITimedBigMessage::IsNoOp怎么用？C++ MIDITimedBigMessage::IsNoOp使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类MIDITimedBigMessage的用法示例。
在下文中一共展示了MIDITimedBigMessage::IsNoOp方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: SoloMelodyConverter
void SoloMelodyConverter( const MIDIMultiTrack &src, MIDIMultiTrack &dst, int ignore_channel )
{
// this simple code works better for src MultiTrack with 1 track,
// if not, we can make before the call of CollapseMultiTrack()
dst.ClearAndResize( src.GetNumTracks() );
dst.SetClksPerBeat( src.GetClksPerBeat() );
MIDIClockTime ev_time = 0;
MIDISequencer seq( &src );
seq.GoToTime( 0 );
if ( !seq.GetNextEventTime ( &ev_time ) )
return; // empty src multitrack
MIDITimedBigMessage ev;
int ev_track;
int solo_note = -1; // highest midi note number in current time, valid values 0...127
bool solo_note_on = false;
MIDITimedBigMessage solo_note_on_ev; // last solo note on event
solo_note_on_ev.SetNoOp();
while ( seq.GetNextEvent( &ev_track, &ev ) )
{
if ( ev.IsServiceMsg() || ev.IsNoOp() )
continue;
if ( ev.IsChannelEvent() )
{
if ( ev.GetChannel() == ignore_channel )
continue;
// if ( ev.IsAllNotesOff() ) ... ; // for future work...
if ( ev.IsNote() )
{
int new_note = ev.GetNote();
// skip all note events if new note lower than solo note
if ( new_note < solo_note )
continue;
// else ( new_note >= solo_note )
if ( ev.ImplicitIsNoteOn() ) // new note on event
{
if ( solo_note_on ) // new note on after previous solo note on
{
// make noteoff message for previous solo note
solo_note_on_ev.SetTime( ev.GetTime() );
solo_note_on_ev.SetVelocity( 0 ); // note off
dst.GetTrack(ev_track)->PutEvent( solo_note_on_ev );
// make new solo note
solo_note_on_ev = ev;
solo_note = new_note;
}
else // ( solo_note_on == false ) - new note on after previous silence
{
// make new solo note
solo_note_on = true;
solo_note_on_ev = ev;
solo_note = new_note;
}
}
else // new note off event ( new_note >= solo_note )
{
if ( solo_note_on ) // new note off after previous solo note on
{
if ( new_note == solo_note ) // solo note off event
{
// test channels of the events
if ( ev.GetChannel() == solo_note_on_ev.GetChannel() )
{
solo_note_on = false;
solo_note = -1; // erase solo_note
}
else
continue; // skip other note off stuff
}
else // ( new_note > solo_note ) any other note off event
continue; // skip other note off stuff
}
else // ( solo_note_on == false ) - new note off after previous silence
continue; // skip other note off stuff
}
}
}
dst.GetTrack(ev_track)->PutEvent(ev);
}
}