diff options
| -rw-r--r-- | libs/ardour/ardour/midi_state_tracker.h | 51 | ||||
| -rw-r--r-- | libs/ardour/midi_state_tracker.cc | 79 |
2 files changed, 130 insertions, 0 deletions
diff --git a/libs/ardour/ardour/midi_state_tracker.h b/libs/ardour/ardour/midi_state_tracker.h new file mode 100644 index 0000000000..ff9fb71ccc --- /dev/null +++ b/libs/ardour/ardour/midi_state_tracker.h @@ -0,0 +1,51 @@ +/* + Copyright (C) 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. +*/ + +#ifndef __ardour_midi_state_tracker_h__ +#define __ardour_midi_state_tracker_h__ + +#include <bitset> + +#include <ardour/midi_buffer.h> + + +namespace ARDOUR { + + +/** Tracks played notes, so they can be resolved in potential stuck note + * situations (e.g. looping, transport stop, etc). + */ +class MidiStateTracker +{ +public: + MidiStateTracker(); + + bool track (const MidiBuffer::iterator& from, const MidiBuffer::iterator& to); + void resolve_notes (MidiBuffer& buffer, nframes_t time); + +private: + void track_note_onoffs(Evoral::MIDIEvent& event); + + std::bitset<128*16> _active_notes; +}; + + +} // namespace ARDOUR + +#endif // __ardour_midi_state_tracker_h__ diff --git a/libs/ardour/midi_state_tracker.cc b/libs/ardour/midi_state_tracker.cc new file mode 100644 index 0000000000..c2aa19e5c8 --- /dev/null +++ b/libs/ardour/midi_state_tracker.cc @@ -0,0 +1,79 @@ +/* + 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 (Evoral::MIDIEvent &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) { + if ((*i).event_type() == LoopEventType) { + ret = true; + continue; + } + + track_note_onoffs (*i); + } + 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 noteoff (time, MIDI_CMD_NOTE_OFF, 3, buffer, false); + + dst.push_back (noteoff); + + _active_notes [channel * 128 + note] = false; + } + } + } +} + |