livetrax/gtk2_ardour/midi_automation_line.cc

/*
 * Copyright (C) 2010-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2010-2014 David Robillard <d@drobilla.net>
 * Copyright (C) 2010-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2013-2019 Robin Gareus <robin@gareus.org>
 *
 * 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.
 */

#include "ardour/midi_automation_list_binder.h"
#include "ardour/midi_region.h"

#include "midi++/midnam_patch.h"

#include "midi_automation_line.h"
#include "midi_time_axis.h"

#include "pbd/i18n.h"

using namespace std;

MidiAutomationLine::MidiAutomationLine (
	const std::string&                                      name,
	TimeAxisView&                                           tav,
	ArdourCanvas::Item&                                     parent,
	std::shared_ptr<ARDOUR::AutomationList>               list,
	std::shared_ptr<ARDOUR::MidiRegion>                   region,
	Evoral::Parameter                                       parameter)
	: AutomationLine (name, tav, parent, list, parameter)
	, _region (region)
	, _parameter (parameter)
{

}

MementoCommandBinder<ARDOUR::AutomationList>*
MidiAutomationLine::memento_command_binder ()
{
	/* some weirdness here since _region->midi_source() returns a
	 * shared_ptr<> but the binder accepts a reference.
	 */

	return new ARDOUR::MidiAutomationListBinder (*(_region->midi_source().get()), _parameter);
}

Temporal::timepos_t
MidiAutomationLine::get_origin() const
{
	/* Events in the automation list are relative to the start of the
	   source, not the start of the region, so we need to use the
	   position-of-the-start-of-the-source, rather than just the
	   position-of-the-region.
	*/
	return _region->source_position();
}

string
MidiAutomationLine::get_verbose_cursor_string (double fraction) const
{
	using namespace MIDI::Name;

	if (_parameter.type() != ARDOUR::MidiCCAutomation) {
		return AutomationLine::get_verbose_cursor_string(fraction);
	}

	MidiTimeAxisView* const mtv = dynamic_cast<MidiTimeAxisView*>(trackview.get_parent());
	if (!mtv) {
		return AutomationLine::get_verbose_cursor_string(fraction);
	}

	const uint8_t channel = mtv->get_preferred_midi_channel();
	std::shared_ptr<const ValueNameList> value_names = mtv->route()->instrument_info().value_name_list_by_control (channel, _parameter.id());

	if (!value_names) {
		return AutomationLine::get_verbose_cursor_string(fraction);
	}

	const uint16_t cc_value = floor(std::max(std::min(fraction * 127.0, 127.0), 0.0));

	std::shared_ptr<const Value> value = value_names->max_value_below(cc_value);
	if (!value) {
		return AutomationLine::get_verbose_cursor_string(fraction);
	}

	return value->name();
}