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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_ring_buffer.h"
#include "ardour/midi_source.h"
#include "ardour/midi_state_tracker.h"
using namespace std;
using namespace ARDOUR;
MidiStateTracker::MidiStateTracker ()
{
reset ();
}
void
MidiStateTracker::reset ()
{
memset (_active_notes, 0, sizeof (_active_notes));
_on = 0;
}
void
MidiStateTracker::track_note_onoffs (const Evoral::MIDIEvent<MidiBuffer::TimeType>& event)
{
if (event.is_note_on()) {
add (event.note(), event.channel());
} else if (event.is_note_off()){
remove (event.note(), event.channel());
}
}
void
MidiStateTracker::add (uint8_t note, uint8_t chn)
{
++_active_notes[note + 128 * chn];
++_on;
}
void
MidiStateTracker::remove (uint8_t note, uint8_t chn)
{
switch (_active_notes[note + 128 * chn]) {
case 0:
break;
case 1:
--_on;
_active_notes [note + 128 * chn] = 0;
break;
default:
--_active_notes [note + 128 * chn];
break;
}
}
void
MidiStateTracker::track (const MidiBuffer::iterator &from, const MidiBuffer::iterator &to, bool& looped)
{
looped = false;
for (MidiBuffer::iterator i = from; i != to; ++i) {
const Evoral::MIDIEvent<MidiBuffer::TimeType> ev(*i, false);
if (ev.event_type() == LoopEventType) {
looped = true;
continue;
}
track_note_onoffs (ev);
}
}
void
MidiStateTracker::resolve_notes (MidiBuffer &dst, framepos_t time)
{
if (!_on) {
return;
}
for (int channel = 0; channel < 16; ++channel) {
for (int note = 0; note < 128; ++note) {
while (_active_notes[note + 128 * channel]) {
uint8_t buffer[3] = { MIDI_CMD_NOTE_OFF | channel, note, 0 };
Evoral::MIDIEvent<MidiBuffer::TimeType> noteoff
(MIDI_CMD_NOTE_OFF, time, 3, buffer, false);
dst.push_back (noteoff);
_active_notes[note + 128 * channel]--;
}
}
}
_on = 0;
}
void
MidiStateTracker::resolve_notes (Evoral::EventSink<framepos_t> &dst, framepos_t time)
{
uint8_t buf[3];
if (!_on) {
return;
}
for (int channel = 0; channel < 16; ++channel) {
for (int note = 0; note < 128; ++note) {
while (_active_notes[note + 128 * channel]) {
buf[0] = MIDI_CMD_NOTE_OFF|channel;
buf[1] = note;
buf[2] = 0;
dst.write (time, EventTypeMap::instance().midi_event_type (buf[0]), 3, buf);
_active_notes[note + 128 * channel]--;
}
}
}
_on = 0;
}
void
MidiStateTracker::resolve_notes (MidiSource& src, Evoral::MusicalTime time)
{
if (!_on) {
return;
}
/* NOTE: the src must be locked */
for (int channel = 0; channel < 16; ++channel) {
for (int note = 0; note < 128; ++note) {
while (_active_notes[note + 128 * channel]) {
Evoral::MIDIEvent<Evoral::MusicalTime> ev ((MIDI_CMD_NOTE_OFF|channel), time, 3, 0, true);
ev.set_type (MIDI_CMD_NOTE_OFF);
ev.set_channel (channel);
ev.set_note (note);
ev.set_velocity (0);
src.append_event_unlocked_beats (ev);
_active_notes[note + 128 * channel]--;
/* don't stack events up at the same time */
time += 1.0/128.0;
}
}
}
_on = 0;
}
void
MidiStateTracker::dump (ostream& o)
{
o << "******\n";
for (int c = 0; c < 16; ++c) {
for (int x = 0; x < 128; ++x) {
if (_active_notes[c * 128 + x]) {
o << "Channel " << c+1 << " Note " << x << " is on ("
<< (int) _active_notes[c*128+x] << "times)\n";
}
}
}
o << "+++++\n";
}
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