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Fix O(n) search on MIDI rec region update (now O(log(n)) per update, but could be O(1) with caching...)

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git-svn-id: svn://localhost/ardour2/branches/3.0@5843 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
David Robillard 2009-10-21 16:39:39 +00:00
parent 2c59ddede5
commit 86a09c58e3
3 changed files with 18 additions and 7 deletions
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4
gtk2_ardour/midi_streamview.cc
View file

@ -575,12 +575,12 @@ MidiStreamView::update_rec_regions (boost::shared_ptr<MidiModel> data, nframes_t
rect->property_x2() = xend;
ARDOUR::BeatsFramesConverter tconv(_trackview.session(), region->position());
const MidiModel::TimeType start_beats = tconv.from(start);
/* draw events */
MidiRegionView* mrv = (MidiRegionView*)iter->second;
// FIXME: this is offensively slow (linear search)
for (MidiModel::Notes::const_iterator i = data->notes().begin();
for (MidiModel::Notes::const_iterator i = data->note_lower_bound(start_beats);
i != data->notes().end(); ++i) {
const boost::shared_ptr<MidiRegionView::NoteType>& note = *i;

2
libs/evoral/evoral/Sequence.hpp
View file

@ -179,6 +179,8 @@ public:
const_iterator begin(Time t=0) const { return const_iterator(*this, t); }
const const_iterator& end() const { return _end_iter; }
typename Notes::const_iterator note_lower_bound (Time t) const;
bool control_to_midi_event(boost::shared_ptr< Event<Time> >& ev,
const ControlIterator& iter) const;

19
libs/evoral/src/Sequence.cpp
View file

@ -99,12 +99,10 @@ Sequence<Time>::const_iterator::const_iterator(const Sequence<Time>& seq, Time t
seq.read_lock();
// Find first note which begins after t
boost::shared_ptr< Note<Time> > search_note(new Note<Time>(0, t, 0, 0, 0));
_note_iter = seq.notes().lower_bound(search_note);
assert(_note_iter == seq.notes().end() || (*_note_iter)->time() >= t);
// Find first note which begins at or after t
_note_iter = seq.note_lower_bound(t);
// Find first sysex event after t
// Find first sysex event at or after t
for (typename Sequence<Time>::SysExes::const_iterator i = seq.sysexes().begin();
i != seq.sysexes().end(); ++i) {
if ((*i)->time() >= t) {
@ -776,6 +774,17 @@ Sequence<Time>::set_notes (const Sequence<Time>::Notes& n)
_notes = n;
}
/** Return the earliest note with time >= t */
template<typename Time>
typename Sequence<Time>::Notes::const_iterator
Sequence<Time>::note_lower_bound (Time t) const
{
boost::shared_ptr< Note<Time> > search_note(new Note<Time>(0, t, 0, 0, 0));
typename Sequence<Time>::Notes::const_iterator i = _notes.lower_bound(search_note);
assert(i == _notes.end() || (*i)->time() >= t);
return i;
}
template class Sequence<Evoral::MusicalTime>;
} // namespace Evoral