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Diffstat (limited to 'libs/ardour/midi_model.cc')
| -rw-r--r-- | libs/ardour/midi_model.cc | 953 |
1 files changed, 953 insertions, 0 deletions
diff --git a/libs/ardour/midi_model.cc b/libs/ardour/midi_model.cc new file mode 100644 index 0000000000..b21bf38873 --- /dev/null +++ b/libs/ardour/midi_model.cc @@ -0,0 +1,953 @@ +/* + Copyright (C) 2007 Paul Davis + Written by Dave Robillard, 2007 + + 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. + + */ + +#define __STDC_LIMIT_MACROS 1 + +#include <iostream> +#include <algorithm> +#include <stdexcept> +#include <stdint.h> +#include <pbd/enumwriter.h> +#include <midi++/events.h> + +#include <ardour/midi_model.h> +#include <ardour/midi_source.h> +#include <ardour/types.h> +#include <ardour/session.h> + +using namespace std; +using namespace ARDOUR; + +void MidiModel::write_lock() { + _lock.writer_lock(); + _automation_lock.lock(); +} + +void MidiModel::write_unlock() { + _lock.writer_unlock(); + _automation_lock.unlock(); +} + +void MidiModel::read_lock() const { + _lock.reader_lock(); + /*_automation_lock.lock();*/ +} + +void MidiModel::read_unlock() const { + _lock.reader_unlock(); + /*_automation_lock.unlock();*/ +} + +// Read iterator (const_iterator) + +MidiModel::const_iterator::const_iterator(const MidiModel& model, double t) + : _model(&model) + , _is_end( (t == DBL_MAX) || model.empty() ) + , _locked( !_is_end ) +{ + //cerr << "Created MIDI iterator @ " << t << " (is end: " << _is_end << ")" << endl; + + if (_is_end) { + return; + } + + model.read_lock(); + + _note_iter = model.notes().end(); + // find first note which begins after t + for (MidiModel::Notes::const_iterator i = model.notes().begin(); i != model.notes().end(); ++i) { + if ((*i)->time() >= t) { + _note_iter = i; + break; + } + } + + MidiControlIterator earliest_control(boost::shared_ptr<AutomationList>(), DBL_MAX, 0.0); + + _control_iters.reserve(model.controls().size()); + + // find the earliest control event available + for (Automatable::Controls::const_iterator i = model.controls().begin(); + i != model.controls().end(); ++i) { + + assert( + i->first.type() == MidiCCAutomation || + i->first.type() == MidiPgmChangeAutomation || + i->first.type() == MidiPitchBenderAutomation || + i->first.type() == MidiChannelAftertouchAutomation); + + double x, y; + bool ret = i->second->list()->rt_safe_earliest_event_unlocked(t, DBL_MAX, x, y); + if (!ret) { + //cerr << "MIDI Iterator: CC " << i->first.id() << " (size " << i->second->list()->size() + // << ") has no events past " << t << endl; + continue; + } + + assert(x >= 0); + + if (y < i->first.min() || y > i->first.max()) { + cerr << "ERROR: Controller (" << i->first.to_string() << ") value '" << y + << "' out of range [" << i->first.min() << "," << i->first.max() + << "], event ignored" << endl; + continue; + } + + const MidiControlIterator new_iter(i->second->list(), x, y); + + //cerr << "MIDI Iterator: CC " << i->first.id() << " added (" << x << ", " << y << ")" << endl; + _control_iters.push_back(new_iter); + + // if the x of the current control is less than earliest_control + // we have a new earliest_control + if (x < earliest_control.x) { + earliest_control = new_iter; + _control_iter = _control_iters.end(); + --_control_iter; + // now _control_iter points to the last Element in _control_iters + } + } + + if (_note_iter != model.notes().end()) { + _event = boost::shared_ptr<MIDI::Event>(new MIDI::Event((*_note_iter)->on_event(), true)); + } + + double time = DBL_MAX; + // in case we have no notes in the region, we still want to get controller messages + if (_event.get()) { + time = _event->time(); + // if the note is going to make it this turn, advance _note_iter + if (earliest_control.x > time) { + _active_notes.push(*_note_iter); + ++_note_iter; + } + } + + // <=, because we probably would want to send control events first + if (earliest_control.automation_list.get() && earliest_control.x <= time) { + model.control_to_midi_event(_event, earliest_control); + } else { + _control_iter = _control_iters.end(); + } + + if ( (! _event.get()) || _event->size() == 0) { + //cerr << "Created MIDI iterator @ " << t << " is at end." << endl; + _is_end = true; + + // eliminate possible race condition here (ugly) + static Glib::Mutex mutex; + Glib::Mutex::Lock lock(mutex); + if (_locked) { + _model->read_unlock(); + _locked = false; + } + } else { + //printf("New MIDI Iterator = %X @ %lf\n", _event->type(), _event->time()); + } + + assert(_is_end || (_event->buffer() && _event->buffer()[0] != '\0')); +} + +MidiModel::const_iterator::~const_iterator() +{ + if (_locked) { + _model->read_unlock(); + } +} + +const MidiModel::const_iterator& MidiModel::const_iterator::operator++() +{ + if (_is_end) { + throw std::logic_error("Attempt to iterate past end of MidiModel"); + } + + assert(_event->buffer() && _event->buffer()[0] != '\0'); + + /*cerr << "const_iterator::operator++: " << _event->to_string() << endl;*/ + + if (! (_event->is_note() || _event->is_cc() || _event->is_pgm_change() || _event->is_pitch_bender() || _event->is_channel_aftertouch()) ) { + cerr << "FAILED event buffer: " << hex << int(_event->buffer()[0]) << int(_event->buffer()[1]) << int(_event->buffer()[2]) << endl; + } + assert((_event->is_note() || _event->is_cc() || _event->is_pgm_change() || _event->is_pitch_bender() || _event->is_channel_aftertouch())); + + // Increment past current control event + if (!_event->is_note() && _control_iter != _control_iters.end() && _control_iter->automation_list.get()) { + double x = 0.0, y = 0.0; + const bool ret = _control_iter->automation_list->rt_safe_earliest_event_unlocked( + _control_iter->x, DBL_MAX, x, y, false); + + if (ret) { + _control_iter->x = x; + _control_iter->y = y; + } else { + _control_iter->automation_list.reset(); + _control_iter->x = DBL_MAX; + } + } + + const std::vector<MidiControlIterator>::iterator old_control_iter = _control_iter; + _control_iter = _control_iters.begin(); + + // find the _control_iter with the earliest event time + for (std::vector<MidiControlIterator>::iterator i = _control_iters.begin(); + i != _control_iters.end(); ++i) { + if (i->x < _control_iter->x) { + _control_iter = i; + } + } + + enum Type {NIL, NOTE_ON, NOTE_OFF, AUTOMATION}; + + Type type = NIL; + double t = 0; + + // Next earliest note on + if (_note_iter != _model->notes().end()) { + type = NOTE_ON; + t = (*_note_iter)->time(); + } + + // Use the next earliest note off iff it's earlier than the note on + if (_model->note_mode() == Sustained && (! _active_notes.empty())) { + if (type == NIL || _active_notes.top()->end_time() <= (*_note_iter)->time()) { + type = NOTE_OFF; + t = _active_notes.top()->end_time(); + } + } + + // Use the next earliest controller iff it's earlier than the note event + if (_control_iter != _control_iters.end() && _control_iter->x != DBL_MAX /*&& _control_iter != old_control_iter */) { + if (type == NIL || _control_iter->x < t) { + type = AUTOMATION; + } + } + + if (type == NOTE_ON) { + //cerr << "********** MIDI Iterator = note on" << endl; + *_event = (*_note_iter)->on_event(); + cerr << "Event contents on note on: " << _event->to_string() << endl; + _active_notes.push(*_note_iter); + ++_note_iter; + } else if (type == NOTE_OFF) { + //cerr << "********** MIDI Iterator = note off" << endl; + *_event = _active_notes.top()->off_event(); + _active_notes.pop(); + } else if (type == AUTOMATION) { + //cerr << "********** MIDI Iterator = Automation" << endl; + _model->control_to_midi_event(_event, *_control_iter); + } else { + //cerr << "********** MIDI Iterator = End" << endl; + _is_end = true; + } + + assert(_is_end || _event->size() > 0); + + return *this; +} + +bool MidiModel::const_iterator::operator==(const const_iterator& other) const +{ + if (_is_end || other._is_end) { + return (_is_end == other._is_end); + } else { + return (_event == other._event); + } +} + +MidiModel::const_iterator& MidiModel::const_iterator::operator=(const const_iterator& other) +{ + if (_locked && _model != other._model) { + _model->read_unlock(); + } + + _model = other._model; + _active_notes = other._active_notes; + _is_end = other._is_end; + _locked = other._locked; + _note_iter = other._note_iter; + _control_iters = other._control_iters; + size_t index = other._control_iter - other._control_iters.begin(); + _control_iter = _control_iters.begin() + index; + + if (!_is_end) { + _event = boost::shared_ptr<MIDI::Event>(new MIDI::Event(*other._event, true)); + } + + return *this; +} + +// MidiModel + +MidiModel::MidiModel(MidiSource *s, size_t size) + : Automatable(s->session(), "midi model") + , _notes(size) + , _note_mode(Sustained) + , _writing(false) + , _edited(false) + , _end_iter(*this, DBL_MAX) + , _next_read(UINT32_MAX) + , _read_iter(*this, DBL_MAX) + , _midi_source(s) +{ + assert(_end_iter._is_end); + assert( ! _end_iter._locked); +} + +/** Read events in frame range \a start .. \a start+cnt into \a dst, + * adding \a stamp_offset to each event's timestamp. + * \return number of events written to \a dst + */ +size_t MidiModel::read(MidiRingBuffer& dst, nframes_t start, nframes_t nframes, + nframes_t stamp_offset, nframes_t negative_stamp_offset) const +{ + //cerr << this << " MM::read @ " << start << " frames: " << nframes << " -> " << stamp_offset << endl; + //cerr << this << " MM # notes: " << n_notes() << endl; + + size_t read_events = 0; + + if (start != _next_read) { + _read_iter = const_iterator(*this, (double)start); + //cerr << "Repositioning iterator from " << _next_read << " to " << start << endl; + } else { + //cerr << "Using cached iterator at " << _next_read << endl; + } + + _next_read = start + nframes; + + while (_read_iter != end() && _read_iter->time() < start + nframes) { + assert(_read_iter->size() > 0); + assert(_read_iter->buffer()); + dst.write(_read_iter->time() + stamp_offset - negative_stamp_offset, + _read_iter->size(), + _read_iter->buffer()); + + /*cerr << this << " MidiModel::read event @ " << _read_iter->time() + << " type: " << hex << int(_read_iter->type()) << dec + << " note: " << int(_read_iter->note()) + << " velocity: " << int(_read_iter->velocity()) + << endl;*/ + + ++_read_iter; + ++read_events; + } + + return read_events; +} + +/** Write the controller event pointed to by \a iter to \a ev. + * The buffer of \a ev will be allocated or resized as necessary. + * \return true on success + */ +bool +MidiModel::control_to_midi_event(boost::shared_ptr<MIDI::Event>& ev, const MidiControlIterator& iter) const +{ + assert(iter.automation_list.get()); + if (!ev) { + ev = boost::shared_ptr<MIDI::Event>(new MIDI::Event(0, 3, NULL, true)); + } + + switch (iter.automation_list->parameter().type()) { + case MidiCCAutomation: + assert(iter.automation_list.get()); + assert(iter.automation_list->parameter().channel() < 16); + assert(iter.automation_list->parameter().id() <= INT8_MAX); + assert(iter.y <= INT8_MAX); + + ev->time() = iter.x; + ev->realloc(3); + ev->buffer()[0] = MIDI_CMD_CONTROL + iter.automation_list->parameter().channel(); + ev->buffer()[1] = (uint8_t)iter.automation_list->parameter().id(); + ev->buffer()[2] = (uint8_t)iter.y; + break; + + case MidiPgmChangeAutomation: + assert(iter.automation_list.get()); + assert(iter.automation_list->parameter().channel() < 16); + assert(iter.automation_list->parameter().id() == 0); + assert(iter.y <= INT8_MAX); + + ev->time() = iter.x; + ev->realloc(2); + ev->buffer()[0] = MIDI_CMD_PGM_CHANGE + iter.automation_list->parameter().channel(); + ev->buffer()[1] = (uint8_t)iter.y; + break; + + case MidiPitchBenderAutomation: + assert(iter.automation_list.get()); + assert(iter.automation_list->parameter().channel() < 16); + assert(iter.automation_list->parameter().id() == 0); + assert(iter.y < (1<<14)); + + ev->time() = iter.x; + ev->realloc(3); + ev->buffer()[0] = MIDI_CMD_BENDER + iter.automation_list->parameter().channel(); + ev->buffer()[1] = uint16_t(iter.y) & 0x7F; // LSB + ev->buffer()[2] = (uint16_t(iter.y) >> 7) & 0x7F; // MSB + //cerr << "Pitch bender event: " << ev->to_string() << " value: " << ev->pitch_bender_value() << " original value: " << iter.y << std::endl; + break; + + case MidiChannelAftertouchAutomation: + assert(iter.automation_list.get()); + assert(iter.automation_list->parameter().channel() < 16); + assert(iter.automation_list->parameter().id() == 0); + assert(iter.y <= INT8_MAX); + + ev->time() = iter.x; + ev->realloc(2); + ev->buffer()[0] + = MIDI_CMD_CHANNEL_PRESSURE + iter.automation_list->parameter().channel(); + ev->buffer()[1] = (uint8_t)iter.y; + break; + + default: + return false; + } + + return true; +} + + +/** Clear all events from the model. + */ +void MidiModel::clear() +{ + _lock.writer_lock(); + _notes.clear(); + clear_automation(); + _next_read = 0; + _read_iter = end(); + _lock.writer_unlock(); +} + + +/** Begin a write of events to the model. + * + * If \a mode is Sustained, complete notes with duration are constructed as note + * on/off events are received. Otherwise (Percussive), only note on events are + * stored; note off events are discarded entirely and all contained notes will + * have duration 0. + */ +void MidiModel::start_write() +{ + //cerr << "MM " << this << " START WRITE, MODE = " << enum_2_string(_note_mode) << endl; + write_lock(); + _writing = true; + for (int i = 0; i < 16; ++i) + _write_notes[i].clear(); + + _dirty_automations.clear(); + write_unlock(); +} + +/** Finish a write of events to the model. + * + * If \a delete_stuck is true and the current mode is Sustained, note on events + * that were never resolved with a corresonding note off will be deleted. + * Otherwise they will remain as notes with duration 0. + */ +void MidiModel::end_write(bool delete_stuck) +{ + write_lock(); + assert(_writing); + + //cerr << "MM " << this << " END WRITE: " << _notes.size() << " NOTES\n"; + + if (_note_mode == Sustained && delete_stuck) { + for (Notes::iterator n = _notes.begin(); n != _notes.end() ;) { + if ((*n)->duration() == 0) { + cerr << "WARNING: Stuck note lost: " << (*n)->note() << endl; + n = _notes.erase(n); + // we have to break here because erase invalidates the iterator + break; + } else { + ++n; + } + } + } + + for (int i = 0; i < 16; ++i) { + if (!_write_notes[i].empty()) { + cerr << "WARNING: MidiModel::end_write: Channel " << i << " has " + << _write_notes[i].size() << " stuck notes" << endl; + } + _write_notes[i].clear(); + } + + for (AutomationLists::const_iterator i = _dirty_automations.begin(); i != _dirty_automations.end(); ++i) { + (*i)->Dirty.emit(); + (*i)->lookup_cache().left = -1; + (*i)->search_cache().left = -1; + } + + _writing = false; + write_unlock(); +} + +/** Append \a in_event to model. NOT realtime safe. + * + * Timestamps of events in \a buf are expected to be relative to + * the start of this model (t=0) and MUST be monotonically increasing + * and MUST be >= the latest event currently in the model. + */ +void MidiModel::append(const MIDI::Event& ev) +{ + write_lock(); + _edited = true; + + assert(_notes.empty() || ev.time() >= _notes.back()->time()); + assert(_writing); + + if (ev.is_note_on()) { + append_note_on_unlocked(ev.channel(), ev.time(), ev.note(), + ev.velocity()); + } else if (ev.is_note_off()) { + append_note_off_unlocked(ev.channel(), ev.time(), ev.note()); + } else if (ev.is_cc()) { + append_automation_event_unlocked(MidiCCAutomation, ev.channel(), + ev.time(), ev.cc_number(), ev.cc_value()); + } else if (ev.is_pgm_change()) { + append_automation_event_unlocked(MidiPgmChangeAutomation, ev.channel(), + ev.time(), ev.pgm_number(), 0); + } else if (ev.is_pitch_bender()) { + append_automation_event_unlocked(MidiPitchBenderAutomation, + ev.channel(), ev.time(), ev.pitch_bender_lsb(), + ev.pitch_bender_msb()); + } else if (ev.is_channel_aftertouch()) { + append_automation_event_unlocked(MidiChannelAftertouchAutomation, + ev.channel(), ev.time(), ev.channel_aftertouch(), 0); + } else { + printf("WARNING: MidiModel: Unknown event type %X\n", ev.type()); + } + + write_unlock(); +} + +void MidiModel::append_note_on_unlocked(uint8_t chan, double time, + uint8_t note_num, uint8_t velocity) +{ + /*cerr << "MidiModel " << this << " chan " << (int)chan << + " note " << (int)note_num << " on @ " << time << endl;*/ + + assert(note_num <= 127); + assert(chan < 16); + assert(_writing); + _edited = true; + + boost::shared_ptr<Note> new_note(new Note(chan, time, 0, note_num, velocity)); + _notes.push_back(new_note); + if (_note_mode == Sustained) { + //cerr << "MM Sustained: Appending active note on " << (unsigned)(uint8_t)note_num << endl; + _write_notes[chan].push_back(_notes.size() - 1); + }/* else { + cerr << "MM Percussive: NOT appending active note on" << endl; + }*/ +} + +void MidiModel::append_note_off_unlocked(uint8_t chan, double time, + uint8_t note_num) +{ + /*cerr << "MidiModel " << this << " chan " << (int)chan << + " note " << (int)note_num << " off @ " << time << endl;*/ + + assert(note_num <= 127); + assert(chan < 16); + assert(_writing); + _edited = true; + + if (_note_mode == Percussive) { + cerr << "MidiModel Ignoring note off (percussive mode)" << endl; + return; + } + + /* FIXME: make _write_notes fixed size (127 noted) for speed */ + + /* FIXME: note off velocity for that one guy out there who actually has + * keys that send it */ + + bool resolved = false; + + for (WriteNotes::iterator n = _write_notes[chan].begin(); n + != _write_notes[chan].end(); ++n) { + Note& note = *_notes[*n].get(); + if (note.note() == note_num) { + assert(time >= note.time()); + note.set_duration(time - note.time()); + _write_notes[chan].erase(n); + //cerr << "MM resolved note, duration: " << note.duration() << endl; + resolved = true; + break; + } + } + + if (!resolved) { + cerr << "MidiModel " << this << " spurious note off chan " << (int)chan + << ", note " << (int)note_num << " @ " << time << endl; + } +} + +void MidiModel::append_automation_event_unlocked(AutomationType type, + uint8_t chan, double time, uint8_t first_byte, uint8_t second_byte) +{ + //cerr << "MidiModel " << this << " chan " << (int)chan << + // " CC " << (int)number << " = " << (int)value << " @ " << time << endl; + + assert(chan < 16); + assert(_writing); + _edited = true; + double value; + + uint32_t id = 0; + + switch (type) { + case MidiCCAutomation: + id = first_byte; + value = double(second_byte); + break; + case MidiChannelAftertouchAutomation: + case MidiPgmChangeAutomation: + id = 0; + value = double(first_byte); + break; + case MidiPitchBenderAutomation: + id = 0; + value = double((0x7F & second_byte) << 7 | (0x7F & first_byte)); + break; + default: + assert(false); + } + + Parameter param(type, id, chan); + boost::shared_ptr<AutomationControl> control = Automatable::control(param, true); + control->list()->rt_add(time, value); +} + +void MidiModel::add_note_unlocked(const boost::shared_ptr<Note> note) +{ + //cerr << "MidiModel " << this << " add note " << (int)note.note() << " @ " << note.time() << endl; + _edited = true; + Notes::iterator i = upper_bound(_notes.begin(), _notes.end(), note, + note_time_comparator); + _notes.insert(i, note); +} + +void MidiModel::remove_note_unlocked(const boost::shared_ptr<const Note> note) +{ + _edited = true; + //cerr << "MidiModel " << this << " remove note " << (int)note.note() << " @ " << note.time() << endl; + for (Notes::iterator n = _notes.begin(); n != _notes.end(); ++n) { + Note& _n = *(*n); + const Note& _note = *note; + // TODO: There is still the issue, that after restarting ardour + // persisted undo does not work, because of rounding errors in the + // event times after saving/restoring to/from MIDI files + /*cerr << "======================================= " << endl; + cerr << int(_n.note()) << "@" << int(_n.time()) << "[" << int(_n.channel()) << "] --" << int(_n.duration()) << "-- #" << int(_n.velocity()) << endl; + cerr << int(_note.note()) << "@" << int(_note.time()) << "[" << int(_note.channel()) << "] --" << int(_note.duration()) << "-- #" << int(_note.velocity()) << endl; + cerr << "Equal: " << bool(_n == _note) << endl; + cerr << endl << endl;*/ + if (_n == _note) { + _notes.erase(n); + // we have to break here, because erase invalidates all iterators, ie. n itself + break; + } + } +} + +/** Slow! for debugging only. */ +#ifndef NDEBUG +bool MidiModel::is_sorted() const { + bool t = 0; + for (Notes::const_iterator n = _notes.begin(); n != _notes.end(); ++n) + if ((*n)->time() < t) + return false; + else + t = (*n)->time(); + + return true; +} +#endif + +/** Start a new command. + * + * This has no side-effects on the model or Session, the returned command + * can be held on to for as long as the caller wishes, or discarded without + * formality, until apply_command is called and ownership is taken. + */ +MidiModel::DeltaCommand* MidiModel::new_delta_command(const string name) +{ + DeltaCommand* cmd = new DeltaCommand(_midi_source->model(), name); + return cmd; +} + +/** Apply a command. + * + * Ownership of cmd is taken, it must not be deleted by the caller. + * The command will constitute one item on the undo stack. + */ +void MidiModel::apply_command(Command* cmd) +{ + _session.begin_reversible_command(cmd->name()); + (*cmd)(); + assert(is_sorted()); + _session.commit_reversible_command(cmd); + _edited = true; +} + +// MidiEditCommand + +MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m, + const std::string& name) + : Command(name) + , _model(m) + , _name(name) +{ +} + +MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m, + const XMLNode& node) + : _model(m) +{ + set_state(node); +} + +void MidiModel::DeltaCommand::add(const boost::shared_ptr<Note> note) +{ + //cerr << "MEC: apply" << endl; + _removed_notes.remove(note); + _added_notes.push_back(note); +} + +void MidiModel::DeltaCommand::remove(const boost::shared_ptr<Note> note) +{ + //cerr << "MEC: remove" << endl; + _added_notes.remove(note); + _removed_notes.push_back(note); +} + +void MidiModel::DeltaCommand::operator()() +{ + // This could be made much faster by using a priority_queue for added and + // removed notes (or sort here), and doing a single iteration over _model + + // Need to reset iterator to drop the read lock it holds, or we'll deadlock + const bool reset_iter = (_model->_read_iter.locked()); + double iter_time = -1.0; + + if (reset_iter) { + if (_model->_read_iter.get_event_pointer().get()) { + iter_time = _model->_read_iter->time(); + } else { + cerr << "MidiModel::DeltaCommand::operator(): WARNING: _read_iter points to no event" << endl; + } + _model->_read_iter = _model->end(); // drop read lock + } + + assert( ! _model->_read_iter.locked()); + + _model->write_lock(); + + for (std::list< boost::shared_ptr<Note> >::iterator i = _added_notes.begin(); i != _added_notes.end(); ++i) + _model->add_note_unlocked(*i); + + for (std::list< boost::shared_ptr<Note> >::iterator i = _removed_notes.begin(); i != _removed_notes.end(); ++i) + _model->remove_note_unlocked(*i); + + _model->write_unlock(); + + if (reset_iter && iter_time != -1.0) { + _model->_read_iter = const_iterator(*_model.get(), iter_time); + } + + _model->ContentsChanged(); /* EMIT SIGNAL */ +} + +void MidiModel::DeltaCommand::undo() +{ + // This could be made much faster by using a priority_queue for added and + // removed notes (or sort here), and doing a single iteration over _model + + // Need to reset iterator to drop the read lock it holds, or we'll deadlock + const bool reset_iter = (_model->_read_iter.locked()); + double iter_time = -1.0; + + if (reset_iter) { + if (_model->_read_iter.get_event_pointer().get()) { + iter_time = _model->_read_iter->time(); + } else { + cerr << "MidiModel::DeltaCommand::undo(): WARNING: _read_iter points to no event" << endl; + } + _model->_read_iter = _model->end(); // drop read lock + } + + assert( ! _model->_read_iter.locked()); + + _model->write_lock(); + + for (std::list< boost::shared_ptr<Note> >::iterator i = _added_notes.begin(); i + != _added_notes.end(); ++i) + _model->remove_note_unlocked(*i); + + for (std::list< boost::shared_ptr<Note> >::iterator i = + _removed_notes.begin(); i != _removed_notes.end(); ++i) + _model->add_note_unlocked(*i); + + _model->write_unlock(); + + if (reset_iter && iter_time != -1.0) { + _model->_read_iter = const_iterator(*_model.get(), iter_time); + } + + _model->ContentsChanged(); /* EMIT SIGNAL */ +} + +XMLNode & MidiModel::DeltaCommand::marshal_note(const boost::shared_ptr<Note> note) +{ + XMLNode *xml_note = new XMLNode("note"); + ostringstream note_str(ios::ate); + note_str << int(note->note()); + xml_note->add_property("note", note_str.str()); + + ostringstream channel_str(ios::ate); + channel_str << int(note->channel()); + xml_note->add_property("channel", channel_str.str()); + + ostringstream time_str(ios::ate); + time_str << int(note->time()); + xml_note->add_property("time", time_str.str()); + + ostringstream duration_str(ios::ate); + duration_str <<(unsigned int) note->duration(); + xml_note->add_property("duration", duration_str.str()); + + ostringstream velocity_str(ios::ate); + velocity_str << (unsigned int) note->velocity(); + xml_note->add_property("velocity", velocity_str.str()); + + return *xml_note; +} + +boost::shared_ptr<Note> MidiModel::DeltaCommand::unmarshal_note(XMLNode *xml_note) +{ + unsigned int note; + istringstream note_str(xml_note->property("note")->value()); + note_str >> note; + + unsigned int channel; + istringstream channel_str(xml_note->property("channel")->value()); + channel_str >> channel; + + unsigned int time; + istringstream time_str(xml_note->property("time")->value()); + time_str >> time; + + unsigned int duration; + istringstream duration_str(xml_note->property("duration")->value()); + duration_str >> duration; + + unsigned int velocity; + istringstream velocity_str(xml_note->property("velocity")->value()); + velocity_str >> velocity; + + boost::shared_ptr<Note> note_ptr(new Note(channel, time, duration, note, velocity)); + return note_ptr; +} + +#define ADDED_NOTES_ELEMENT "added_notes" +#define REMOVED_NOTES_ELEMENT "removed_notes" +#define DELTA_COMMAND_ELEMENT "DeltaCommand" + +int MidiModel::DeltaCommand::set_state(const XMLNode& delta_command) +{ + if (delta_command.name() != string(DELTA_COMMAND_ELEMENT)) { + return 1; + } + + _added_notes.clear(); + XMLNode *added_notes = delta_command.child(ADDED_NOTES_ELEMENT); + XMLNodeList notes = added_notes->children(); + transform(notes.begin(), notes.end(), back_inserter(_added_notes), + sigc::mem_fun(*this, &DeltaCommand::unmarshal_note)); + + _removed_notes.clear(); + XMLNode *removed_notes = delta_command.child(REMOVED_NOTES_ELEMENT); + notes = removed_notes->children(); + transform(notes.begin(), notes.end(), back_inserter(_removed_notes), + sigc::mem_fun(*this, &DeltaCommand::unmarshal_note)); + + return 0; +} + +XMLNode& MidiModel::DeltaCommand::get_state() +{ + XMLNode *delta_command = new XMLNode(DELTA_COMMAND_ELEMENT); + delta_command->add_property("midi_source", _model->midi_source()->id().to_s()); + + XMLNode *added_notes = delta_command->add_child(ADDED_NOTES_ELEMENT); + for_each(_added_notes.begin(), _added_notes.end(), sigc::compose( + sigc::mem_fun(*added_notes, &XMLNode::add_child_nocopy), + sigc::mem_fun(*this, &DeltaCommand::marshal_note))); + + XMLNode *removed_notes = delta_command->add_child(REMOVED_NOTES_ELEMENT); + for_each(_removed_notes.begin(), _removed_notes.end(), sigc::compose( + sigc::mem_fun(*removed_notes, &XMLNode::add_child_nocopy), + sigc::mem_fun(*this, &DeltaCommand::marshal_note))); + + return *delta_command; +} + +struct EventTimeComparator { + typedef const MIDI::Event* value_type; + inline bool operator()(const MIDI::Event& a, const MIDI::Event& b) const { + return a.time() >= b.time(); + } +}; + +/** Write the model to a MidiSource (i.e. save the model). + * This is different from manually using read to write to a source in that + * note off events are written regardless of the track mode. This is so the + * user can switch a recorded track (with note durations from some instrument) + * to percussive, save, reload, then switch it back to sustained without + * destroying the original note durations. + */ +bool MidiModel::write_to(boost::shared_ptr<MidiSource> source) +{ + read_lock(); + + const NoteMode old_note_mode = _note_mode; + _note_mode = Sustained; + + for (const_iterator i = begin(); i != end(); ++i) { + source->append_event_unlocked(Frames, *i); + } + + _note_mode = old_note_mode; + + read_unlock(); + _edited = false; + + return true; +} + +XMLNode& MidiModel::get_state() +{ + XMLNode *node = new XMLNode("MidiModel"); + return *node; +} + |