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/*
Copyright (C) 2006-2008 Paul Davis
Author: Torben Hohn
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2 of the License, or (at your option)
any later version.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <iostream>
#include <ardour/event_type_map.h>
#include <ardour/midi_state_tracker.h>
using namespace std;
using namespace ARDOUR;
MidiStateTracker::MidiStateTracker ()
{
_active_notes.reset();
}
void
MidiStateTracker::track_note_onoffs (const Evoral::MIDIEvent<MidiBuffer::TimeType>& event)
{
if (event.is_note_on()) {
_active_notes [event.note() + 128 * event.channel()] = true;
} else if (event.is_note_off()){
_active_notes [event.note() + 128 * event.channel()] = false;
}
}
bool
MidiStateTracker::track (const MidiBuffer::iterator &from, const MidiBuffer::iterator &to)
{
bool ret = false;
for (MidiBuffer::iterator i = from; i != to; ++i) {
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev(*i, false);
if (ev.event_type() == LoopEventType) {
ret = true;
continue;
}
track_note_onoffs (ev);
}
return ret;
}
void
MidiStateTracker::resolve_notes (MidiBuffer &dst, nframes_t time)
{
// Dunno if this is actually faster but at least it fills our cacheline.
if (_active_notes.none ())
return;
for (int channel = 0; channel < 16; ++channel) {
for (int note = 0; note < 128; ++note) {
if (_active_notes[channel * 128 + note]) {
uint8_t buffer[3] = { MIDI_CMD_NOTE_OFF | channel, note, 0 };
Evoral::MIDIEvent<MidiBuffer::TimeType> noteoff
(time, MIDI_CMD_NOTE_OFF, 3, buffer, false);
dst.push_back (noteoff);
_active_notes [channel * 128 + note] = false;
}
}
}
}
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