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livetrax/gtk2_ardour/automation_streamview.cc
Paul Davis 1686db8b0c Change the type of reference held by a MidiModel to its MidiSource
This also requires a change in the type of reference held by
a MidiAutomationListBinder.

Both the MidiSource and MidiModel have a reference to each other, and it is
important that we avoid circular references to avoid problems with object
destruction. We had been accomplishing this by having the Model hold a
weak_ptr<MidiSource>. However, the lifetime of a MidiSource and its MidiModel
are coincident and there's really no need to use a smart ptr at all. A normal
reference is just fine. However, due to constructors that accept a serialized
state, we cannot use an actual reference (we cannot set the constructor in the
initializer list), so we use a bare ptr instead.

This forces a similar change in MidiAutomationListBinder, which also maintains
a reference to the Source. However, the only purpose of this object is to
ensure that if the Source is destroyed, relevant commands will be removed from
the undo/redo history, and so all that matters here is that the binder connects
to the Destroyed signal of the source, and arranges for its own destruction
when received.

Note that the previous construction of the binder, actually holding a
shared_ptr<MidiSource> would appear have prevented the Destroyed signal from
ever being emitted (from ~Destructible), and so this may also be a bug fix that
allows MidiSources to actually be deleted (the memory object, not the file).
2022-04-05 20:52:09 -06:00

350 lines
9.9 KiB
C++

/*
* Copyright (C) 2007-2014 David Robillard <d@drobilla.net>
* Copyright (C) 2008-2017 Paul Davis <paul@linuxaudiosystems.com>
* Copyright (C) 2009-2011 Carl Hetherington <carl@carlh.net>
* Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
* Copyright (C) 2015 Tim Mayberry <mojofunk@gmail.com>
*
* 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 <cmath>
#include <list>
#include <utility>
#include <gtkmm.h>
#include "gtkmm2ext/gtk_ui.h"
#include "pbd/compose.h"
#include "canvas/debug.h"
#include "ardour/midi_region.h"
#include "ardour/midi_source.h"
#include "automation_region_view.h"
#include "automation_streamview.h"
#include "automation_time_axis.h"
#include "gui_thread.h"
#include "public_editor.h"
#include "region_selection.h"
#include "region_view.h"
#include "rgb_macros.h"
#include "selection.h"
#include "ui_config.h"
#include "pbd/i18n.h"
using namespace std;
using namespace ARDOUR;
using namespace ARDOUR_UI_UTILS;
using namespace PBD;
using namespace Editing;
AutomationStreamView::AutomationStreamView (AutomationTimeAxisView& tv)
: StreamView (*dynamic_cast<RouteTimeAxisView*>(tv.get_parent()),
tv.canvas_display())
, _automation_view(tv)
, _pending_automation_state (Off)
{
CANVAS_DEBUG_NAME (_canvas_group, string_compose ("SV canvas group auto %1", tv.name()));
CANVAS_DEBUG_NAME (canvas_rect, string_compose ("SV canvas rectangle auto %1", tv.name()));
color_handler ();
UIConfiguration::instance().ColorsChanged.connect(sigc::mem_fun(*this, &AutomationStreamView::color_handler));
}
AutomationStreamView::~AutomationStreamView ()
{
}
RegionView*
AutomationStreamView::add_region_view_internal (boost::shared_ptr<Region> region, bool wait_for_data, bool /*recording*/)
{
if (!region) {
return 0;
}
const boost::shared_ptr<AutomationControl> control = boost::dynamic_pointer_cast<AutomationControl> (
region->control (_automation_view.parameter(), true)
);
boost::shared_ptr<AutomationList> list;
if (control) {
list = boost::dynamic_pointer_cast<AutomationList>(control->list());
if (control->list() && !list) {
error << _("unable to display automation region for control without list") << endmsg;
return 0;
}
}
AutomationRegionView *region_view;
std::list<RegionView *>::iterator i;
for (i = region_views.begin(); i != region_views.end(); ++i) {
if ((*i)->region() == region) {
/* great. we already have an AutomationRegionView for this Region. use it again. */
AutomationRegionView* arv = dynamic_cast<AutomationRegionView*>(*i);;
if (arv->line()) {
arv->line()->set_list (list);
}
(*i)->set_valid (true);
(*i)->enable_display (wait_for_data);
display_region(arv);
return 0;
}
}
region_view = new AutomationRegionView (
_canvas_group, _automation_view, region,
_automation_view.parameter (), list,
_samples_per_pixel, region_color
);
region_view->init (false);
region_views.push_front (region_view);
/* follow global waveform setting */
if (wait_for_data) {
region_view->enable_display(true);
// region_view->midi_region()->midi_source(0)->load_model();
}
display_region (region_view);
/* catch regionview going away */
region->DropReferences.connect (*this, invalidator (*this), boost::bind (&AutomationStreamView::remove_region_view, this, boost::weak_ptr<Region>(region)), gui_context());
/* setup automation state for this region */
boost::shared_ptr<AutomationLine> line = region_view->line ();
if (line && line->the_list()) {
line->the_list()->set_automation_state (automation_state ());
}
RegionViewAdded (region_view);
return region_view;
}
void
AutomationStreamView::display_region(AutomationRegionView* region_view)
{
region_view->line().reset();
}
void
AutomationStreamView::set_automation_state (AutoState state)
{
/* Setting the automation state for this view sets the state of all regions' lists to the same thing */
if (region_views.empty()) {
_pending_automation_state = state;
} else {
list<boost::shared_ptr<AutomationLine> > lines = get_lines ();
for (list<boost::shared_ptr<AutomationLine> >::iterator i = lines.begin(); i != lines.end(); ++i) {
if ((*i)->the_list()) {
(*i)->the_list()->set_automation_state (state);
}
}
}
}
void
AutomationStreamView::redisplay_track ()
{
// Flag region views as invalid and disable drawing
for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
(*i)->set_valid (false);
(*i)->enable_display(false);
}
// Add and display region views, and flag them as valid
if (_trackview.is_track()) {
_trackview.track()->playlist()->foreach_region (
sigc::hide_return (sigc::mem_fun (*this, &StreamView::add_region_view))
);
}
// Stack regions by layer, and remove invalid regions
layer_regions();
}
void
AutomationStreamView::setup_rec_box ()
{
}
void
AutomationStreamView::color_handler ()
{
if (_trackview.is_midi_track()) {
canvas_rect->set_fill_color (UIConfiguration::instance().color_mod ("midi track base", "midi track base"));
} else {
canvas_rect->set_fill_color (UIConfiguration::instance().color ("midi bus base"));
}
}
AutoState
AutomationStreamView::automation_state () const
{
if (region_views.empty()) {
return _pending_automation_state;
}
boost::shared_ptr<AutomationLine> line = ((AutomationRegionView*) region_views.front())->line ();
if (!line || !line->the_list()) {
return Off;
}
return line->the_list()->automation_state ();
}
bool
AutomationStreamView::has_automation () const
{
list<boost::shared_ptr<AutomationLine> > lines = get_lines ();
for (list<boost::shared_ptr<AutomationLine> >::iterator i = lines.begin(); i != lines.end(); ++i) {
if ((*i)->npoints() > 0) {
return true;
}
}
return false;
}
/** Our parent AutomationTimeAxisView calls this when the user requests a particular
* InterpolationStyle; tell the AutomationLists in our regions.
*/
void
AutomationStreamView::set_interpolation (AutomationList::InterpolationStyle s)
{
list<boost::shared_ptr<AutomationLine> > lines = get_lines ();
for (list<boost::shared_ptr<AutomationLine> >::iterator i = lines.begin(); i != lines.end(); ++i) {
(*i)->the_list()->set_interpolation (s);
}
}
AutomationList::InterpolationStyle
AutomationStreamView::interpolation () const
{
if (region_views.empty()) {
return AutomationList::Linear;
}
AutomationRegionView* v = dynamic_cast<AutomationRegionView*> (region_views.front());
if (v) {
return v->line()->the_list()->interpolation ();
}
return AutomationList::Linear;
}
/** Clear all automation displayed in this view */
void
AutomationStreamView::clear ()
{
list<boost::shared_ptr<AutomationLine> > lines = get_lines ();
for (list<boost::shared_ptr<AutomationLine> >::iterator i = lines.begin(); i != lines.end(); ++i) {
(*i)->clear ();
}
}
/** @param start Start position in session samples.
* @param end End position in session samples.
* @param bot Bottom position expressed as a fraction of track height where 0 is the bottom of the track.
* @param top Top position expressed as a fraction of track height where 0 is the bottom of the track.
* NOTE: this y system is different to that for the StreamView method that this overrides, which is a little
* confusing.
*/
void
AutomationStreamView::get_selectables (timepos_t const & start, timepos_t const & end, double botfrac, double topfrac, list<Selectable*>& results, bool /*within*/)
{
for (list<RegionView*>::iterator i = region_views.begin(); i != region_views.end(); ++i) {
AutomationRegionView* arv = dynamic_cast<AutomationRegionView*> (*i);
if (arv) {
arv->line()->get_selectables (start, end, botfrac, topfrac, results);
}
}
}
void
AutomationStreamView::set_selected_points (PointSelection& ps)
{
list<boost::shared_ptr<AutomationLine> > lines = get_lines ();
for (list<boost::shared_ptr<AutomationLine> >::iterator i = lines.begin(); i != lines.end(); ++i) {
(*i)->set_selected_points (ps);
}
}
list<boost::shared_ptr<AutomationLine> >
AutomationStreamView::get_lines () const
{
list<boost::shared_ptr<AutomationLine> > lines;
for (list<RegionView*>::const_iterator i = region_views.begin(); i != region_views.end(); ++i) {
AutomationRegionView* arv = dynamic_cast<AutomationRegionView*> (*i);
if (arv) {
lines.push_back (arv->line());
}
}
return lines;
}
bool
AutomationStreamView::paste (timepos_t const & pos,
unsigned paste_count,
float times,
boost::shared_ptr<ARDOUR::AutomationList> alist)
{
/* XXX: not sure how best to pick this; for now, just use the last region which starts before pos */
if (region_views.empty()) {
return false;
}
region_views.sort (RegionView::PositionOrder());
list<RegionView*>::const_iterator prev = region_views.begin ();
for (list<RegionView*>::const_iterator i = region_views.begin(); i != region_views.end(); ++i) {
if ((*i)->region()->position() > pos) {
break;
}
prev = i;
}
boost::shared_ptr<Region> r = (*prev)->region ();
/* If *prev doesn't cover pos, it's no good */
if (r->position() > pos || ((r->position() + r->length()) < pos)) {
return false;
}
AutomationRegionView* arv = dynamic_cast<AutomationRegionView*> (*prev);
return arv ? arv->paste(pos, paste_count, times, alist) : false;
}