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/*
* Copyright (C) 2008-2015 David Robillard <d@drobilla.net>
* Copyright (C) 2009-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2010-2011 Carl Hetherington <carl@carlh.net>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifndef __ardour_midi_state_tracker_h__
#define __ardour_midi_state_tracker_h__
#include <glibmm/threads.h>
#include "temporal/beats.h"
#include "ardour/midi_buffer.h"
namespace Evoral {
template <typename T> class EventSink;
}
namespace ARDOUR {
class MidiSource;
/** Tracks played notes, so they can be resolved in potential stuck note
* situations (e.g. looping, transport stop, etc).
*/
class LIBARDOUR_API MidiStateTracker
{
public:
MidiStateTracker();
void track (const MidiBuffer::const_iterator& from, const MidiBuffer::const_iterator& to);
void track (const uint8_t* evbuf);
void add (uint8_t note, uint8_t chn);
void remove (uint8_t note, uint8_t chn);
void resolve_notes (MidiBuffer& buffer, samplepos_t time);
void resolve_notes (Evoral::EventSink<samplepos_t>& buffer, samplepos_t time);
void resolve_notes (MidiSource& src, const Glib::Threads::Mutex::Lock& lock, Temporal::Beats time);
void dump (std::ostream&);
void reset ();
bool empty() const { return _on == 0; }
uint16_t on() const { return _on; }
bool active (uint8_t note, uint8_t channel) {
return _active_notes[(channel*128)+note] > 0;
}
template<typename Time>
void track (const Evoral::Event<Time>& ev) {
track (ev.buffer());
}
private:
uint8_t _active_notes[128*16];
uint16_t _on;
};
} // namespace ARDOUR
#endif // __ardour_midi_state_tracker_h__
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