/*
- Copyright (C) 2000 Paul Davis
+ Copyright (C) 2000 Paul Davis
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
#include <sigc++/bind.h>
-#include <pbd/error.h>
-#include <pbd/stl_delete.h>
-#include <pbd/whitespace.h>
+#include "pbd/error.h"
+#include "pbd/stl_delete.h"
+#include "pbd/whitespace.h"
+#include "pbd/basename.h"
+#include "pbd/enumwriter.h"
+#include "pbd/memento_command.h"
#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/selector.h>
#include <gtkmm2ext/bindable_button.h>
#include <gtkmm2ext/utils.h>
-#include <ardour/midi_playlist.h>
-#include <ardour/midi_diskstream.h>
-#include <ardour/processor.h>
-#include <ardour/ladspa_plugin.h>
-#include <ardour/location.h>
-#include <ardour/playlist.h>
-#include <ardour/session.h>
-#include <ardour/session_playlist.h>
-#include <ardour/utils.h>
+#include "ardour/midi_playlist.h"
+#include "ardour/midi_diskstream.h"
+#include "ardour/midi_patch_manager.h"
+#include "ardour/midi_source.h"
+#include "ardour/processor.h"
+#include "ardour/ladspa_plugin.h"
+#include "ardour/location.h"
+#include "ardour/playlist.h"
+#include "ardour/region_factory.h"
+#include "ardour/session.h"
+#include "ardour/session_playlist.h"
+#include "ardour/tempo.h"
+#include "ardour/utils.h"
+#include "add_midi_cc_track_dialog.h"
#include "ardour_ui.h"
-#include "midi_time_axis.h"
-#include "automation_time_axis.h"
#include "automation_line.h"
-#include "add_midi_cc_track_dialog.h"
+#include "automation_time_axis.h"
+#include "canvas-note-event.h"
#include "canvas_impl.h"
#include "crossfade_view.h"
+#include "editor.h"
#include "enums.h"
+#include "ghostregion.h"
#include "gui_thread.h"
#include "keyboard.h"
+#include "midi_scroomer.h"
+#include "midi_streamview.h"
+#include "midi_region_view.h"
+#include "midi_time_axis.h"
+#include "piano_roll_header.h"
#include "playlist_selector.h"
#include "plugin_selector.h"
#include "plugin_ui.h"
#include "point_selection.h"
#include "prompter.h"
-#include "public_editor.h"
#include "region_view.h"
#include "rgb_macros.h"
#include "selection.h"
#include "simplerect.h"
-#include "midi_streamview.h"
#include "utils.h"
-#include "midi_scroomer.h"
-#include "piano_roll_header.h"
-#include "ghostregion.h"
-#include <ardour/midi_track.h>
+#include "ardour/midi_track.h"
#include "i18n.h"
using namespace sigc;
using namespace Editing;
+// Minimum height at which a control is displayed
+static const uint32_t MIDI_CONTROLS_BOX_MIN_HEIGHT = 162;
+static const uint32_t KEYBOARD_MIN_HEIGHT = 140;
-MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session& sess, boost::shared_ptr<Route> rt, Canvas& canvas)
+MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session& sess,
+ boost::shared_ptr<Route> rt, Canvas& canvas)
: AxisView(sess) // virtually inherited
, RouteTimeAxisView(ed, sess, rt, canvas)
- , _ignore_signals(false)
+ , _ignore_signals(false)
, _range_scroomer(0)
, _piano_roll_header(0)
, _note_mode(Sustained)
- , _note_mode_item(NULL)
- , _percussion_mode_item(NULL)
- , _midi_expander("MIDI")
+ , _note_mode_item(0)
+ , _percussion_mode_item(0)
+ , _color_mode(MeterColors)
+ , _meter_color_mode_item(0)
+ , _channel_color_mode_item(0)
+ , _track_color_mode_item(0)
+ , _step_edit_item (0)
+ , _midi_thru_item (0)
+ , default_channel_menu (0)
{
subplugin_menu.set_name ("ArdourContextMenu");
mute_button->set_active (false);
solo_button->set_active (false);
-
+
+ step_edit_insert_position = 0;
+
if (is_midi_track()) {
controls_ebox.set_name ("MidiTimeAxisViewControlsBaseUnselected");
_note_mode = midi_track()->note_mode();
ensure_xml_node ();
- set_state (*xml_node);
-
+ set_state (*xml_node, Stateful::loading_state_version);
+
_route->processors_changed.connect (mem_fun(*this, &MidiTimeAxisView::processors_changed));
if (is_track()) {
_view->RegionViewAdded.connect (mem_fun(*this, &MidiTimeAxisView::region_view_added));
_view->attach ();
}
-
- // add channel selector expander
- HBox *channel_selector_box = manage(new HBox());
- channel_selector_box->pack_start(_channel_selector, SHRINK, 0);
- _midi_expander.add(*channel_selector_box);
- _midi_expander.property_expanded().signal_changed().connect(
- mem_fun(this, &MidiTimeAxisView::channel_selector_toggled));
- controls_vbox.pack_end(_midi_expander, SHRINK, 0);
+
+ HBox* midi_controls_hbox = manage(new HBox());
+
+ MIDI::Name::MidiPatchManager& patch_manager = MIDI::Name::MidiPatchManager::instance();
+
+ MIDI::Name::MasterDeviceNames::Models::const_iterator m = patch_manager.all_models().begin();
+ for (; m != patch_manager.all_models().end(); ++m) {
+ _model_selector.append_text(m->c_str());
+ }
+
+ _model_selector.signal_changed().connect(mem_fun(*this, &MidiTimeAxisView::model_changed));
+
+ _custom_device_mode_selector.signal_changed().connect(
+ mem_fun(*this, &MidiTimeAxisView::custom_device_mode_changed));
+
+ // TODO: persist the choice
+ // this initializes the comboboxes and sends out the signal
+ _model_selector.set_active(0);
+
+ midi_controls_hbox->pack_start(_channel_selector, true, false);
+ if (!patch_manager.all_models().empty()) {
+ _midi_controls_box.pack_start(_model_selector, true, false);
+ _midi_controls_box.pack_start(_custom_device_mode_selector, true, false);
+ }
+
+ _midi_controls_box.pack_start(*midi_controls_hbox, true, true);
+
+ controls_vbox.pack_start(_midi_controls_box, false, false);
+
boost::shared_ptr<MidiDiskstream> diskstream = midi_track()->midi_diskstream();
// restore channel selector settings
- _channel_selector.set_channel_mode(diskstream->get_channel_mode(), diskstream->get_channel_mask());
+ _channel_selector.set_channel_mode(diskstream->get_channel_mode(),
+ diskstream->get_channel_mask());
_channel_selector.mode_changed.connect(
mem_fun(*midi_track()->midi_diskstream(), &MidiDiskstream::set_channel_mode));
+ XMLProperty *prop;
+ if ((prop = xml_node->property ("color-mode")) != 0) {
+ _color_mode = ColorMode (string_2_enum(prop->value(), _color_mode));
+ if (_color_mode == ChannelColors) {
+ _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
+ }
+ }
+
+ if ((prop = xml_node->property ("note-mode")) != 0) {
+ _note_mode = NoteMode (string_2_enum(prop->value(), _note_mode));
+ if (mode_menu) {
+ _percussion_mode_item->set_active (_note_mode == Percussive);
+ }
+ }
}
MidiTimeAxisView::~MidiTimeAxisView ()
_range_scroomer = 0;
}
+void MidiTimeAxisView::model_changed()
+{
+ std::list<std::string> device_modes = MIDI::Name::MidiPatchManager::instance()
+ .custom_device_mode_names_by_model(_model_selector.get_active_text());
+
+ _custom_device_mode_selector.clear_items();
+
+ for (std::list<std::string>::const_iterator i = device_modes.begin();
+ i != device_modes.end(); ++i) {
+ cerr << "found custom device mode " << *i << " thread_id: " << pthread_self() << endl;
+ _custom_device_mode_selector.append_text(*i);
+ }
+
+ _custom_device_mode_selector.set_active(0);
+}
+
+void MidiTimeAxisView::custom_device_mode_changed()
+{
+ _midi_patch_settings_changed.emit(_model_selector.get_active_text(),
+ _custom_device_mode_selector.get_active_text());
+}
+
MidiStreamView*
MidiTimeAxisView::midi_view()
{
MidiTimeAxisView::show_at (double y, int& nth, Gtk::VBox *parent)
{
ensure_xml_node ();
- xml_node->add_property ("shown_editor", "yes");
-
+ xml_node->add_property ("shown-editor", "yes");
+
guint32 ret = TimeAxisView::show_at (y, nth, parent);
- _piano_roll_header->show();
- _range_scroomer->show();
return ret;
}
MidiTimeAxisView::hide ()
{
ensure_xml_node ();
- xml_node->add_property ("shown_editor", "no");
+ xml_node->add_property ("shown-editor", "no");
TimeAxisView::hide ();
}
{
RouteTimeAxisView::set_height (h);
- if (height >= hLarger) {
- _midi_expander.show();
- if (is_track() && _range_scroomer)
- _range_scroomer->show();
- if (is_track() && _piano_roll_header)
- _piano_roll_header->show();
+ if (height >= MIDI_CONTROLS_BOX_MIN_HEIGHT) {
+ _midi_controls_box.show();
+ } else {
+ _midi_controls_box.hide();
+ }
- } else if (height >= hLarge) {
- _midi_expander.show();
- _midi_expander.set_expanded(FALSE);
+ if (height >= KEYBOARD_MIN_HEIGHT) {
if (is_track() && _range_scroomer)
_range_scroomer->show();
if (is_track() && _piano_roll_header)
_piano_roll_header->show();
-
- } else if (height >= hNormal) {
- _midi_expander.show();
- _midi_expander.set_expanded(FALSE);
- if (is_track() && _range_scroomer)
- _range_scroomer->hide();
- if (is_track() && _piano_roll_header)
- _piano_roll_header->hide();
} else {
- _midi_expander.hide();
- _midi_expander.set_expanded(FALSE);
if (is_track() && _range_scroomer)
_range_scroomer->hide();
if (is_track() && _piano_roll_header)
Menu *range_menu = manage(new Menu);
MenuList& range_items = range_menu->items();
range_menu->set_name ("ArdourContextMenu");
-
+
range_items.push_back (MenuElem (_("Show Full Range"), bind (
mem_fun(*this, &MidiTimeAxisView::set_note_range),
MidiStreamView::FullRange)));
-
+
range_items.push_back (MenuElem (_("Fit Contents"), bind (
mem_fun(*this, &MidiTimeAxisView::set_note_range),
MidiStreamView::ContentsRange)));
items.push_back (MenuElem (_("Note range"), *range_menu));
+ items.push_back (MenuElem (_("Note mode"), *build_note_mode_menu()));
+ items.push_back (MenuElem (_("Default Channel"), *build_def_channel_menu()));
+
+ items.push_back (CheckMenuElem (_("MIDI Thru"), mem_fun(*this, &MidiTimeAxisView::toggle_midi_thru)));
+ _midi_thru_item = dynamic_cast<CheckMenuItem*>(&items.back());
+}
+
+Gtk::Menu*
+MidiTimeAxisView::build_def_channel_menu ()
+{
+ using namespace Menu_Helpers;
+
+ if (default_channel_menu == 0) {
+ default_channel_menu = manage (new Menu ());
+ }
+
+ uint8_t defchn = midi_track()->default_channel();
+ MenuList& def_channel_items = default_channel_menu->items();
+ RadioMenuItem* item;
+ RadioMenuItem::Group dc_group;
+
+ for (int i = 0; i < 16; ++i) {
+ char buf[4];
+ snprintf (buf, sizeof (buf), "%d", i+1);
+
+ def_channel_items.push_back (RadioMenuElem (dc_group, buf,
+ bind (mem_fun (*this, &MidiTimeAxisView::set_default_channel), i)));
+ item = dynamic_cast<RadioMenuItem*>(&def_channel_items.back());
+ item->set_active ((i == defchn));
+ }
+
+ return default_channel_menu;
+}
+
+void
+MidiTimeAxisView::set_default_channel (int chn)
+{
+ midi_track()->set_default_channel (chn);
+}
+
+void
+MidiTimeAxisView::toggle_midi_thru ()
+{
+ if (!_midi_thru_item) {
+ return;
+ }
+
+ bool view_yn = _midi_thru_item->get_active();
+ if (view_yn != midi_track()->midi_thru()) {
+ midi_track()->set_midi_thru (view_yn);
+ }
}
void
RouteTimeAxisView::build_automation_action_menu ();
MenuList& automation_items = automation_action_menu->items();
-
+
automation_items.push_back (SeparatorElem());
- automation_items.push_back (MenuElem (_("Controller..."),
+ automation_items.push_back (MenuElem (_("Controller..."),
mem_fun(*this, &MidiTimeAxisView::add_cc_track)));
- automation_items.push_back (MenuElem (_("Bender"),
+ automation_items.push_back (MenuElem (_("Program Change"),
sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
- Parameter(MidiPitchBenderAutomation))));
- automation_items.push_back (MenuElem (_("Pressure"),
+ Evoral::Parameter(MidiPgmChangeAutomation))));
+ automation_items.push_back (MenuElem (_("Bender"),
sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
- Parameter(MidiChannelPressureAutomation))));
-
+ Evoral::Parameter(MidiPitchBenderAutomation))));
+ automation_items.push_back (MenuElem (_("Pressure"),
+ sigc::bind(mem_fun(*this, &MidiTimeAxisView::add_parameter_track),
+ Evoral::Parameter(MidiChannelPressureAutomation))));
}
Gtk::Menu*
-MidiTimeAxisView::build_mode_menu()
+MidiTimeAxisView::build_note_mode_menu()
{
using namespace Menu_Helpers;
return mode_menu;
}
-
+
+Gtk::Menu*
+MidiTimeAxisView::build_color_mode_menu()
+{
+ using namespace Menu_Helpers;
+
+ Menu* mode_menu = manage (new Menu);
+ MenuList& items = mode_menu->items();
+ mode_menu->set_name ("ArdourContextMenu");
+
+ RadioMenuItem::Group mode_group;
+ items.push_back (RadioMenuElem (mode_group, _("Meter Colors"),
+ bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), MeterColors)));
+ _meter_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
+ _meter_color_mode_item->set_active(_color_mode == MeterColors);
+
+ items.push_back (RadioMenuElem (mode_group, _("Channel Colors"),
+ bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), ChannelColors)));
+ _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
+ _channel_color_mode_item->set_active(_color_mode == ChannelColors);
+
+ items.push_back (RadioMenuElem (mode_group, _("Track Color"),
+ bind (mem_fun (*this, &MidiTimeAxisView::set_color_mode), TrackColor)));
+ _channel_color_mode_item = dynamic_cast<RadioMenuItem*>(&items.back());
+ _channel_color_mode_item->set_active(_color_mode == TrackColor);
+
+ return mode_menu;
+}
+
void
MidiTimeAxisView::set_note_mode(NoteMode mode)
{
if (_note_mode != mode || midi_track()->note_mode() != mode) {
_note_mode = mode;
midi_track()->set_note_mode(mode);
+ xml_node->add_property ("note-mode", enum_2_string(_note_mode));
_view->redisplay_diskstream();
}
}
+void
+MidiTimeAxisView::set_color_mode(ColorMode mode)
+{
+ if (_color_mode != mode) {
+ if (mode == ChannelColors) {
+ _channel_selector.set_channel_colors(CanvasNoteEvent::midi_channel_colors);
+ } else {
+ _channel_selector.set_default_channel_color();
+ }
+
+ _color_mode = mode;
+ xml_node->add_property ("color-mode", enum_2_string(_color_mode));
+ _view->redisplay_diskstream();
+ }
+}
void
MidiTimeAxisView::set_note_range(MidiStreamView::VisibleNoteRange range)
MidiTimeAxisView::show_all_automation ()
{
if (midi_track()) {
- const set<Parameter> params = midi_track()->midi_diskstream()->
+ const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
midi_playlist()->contained_automation();
- for (set<Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
+ for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
create_automation_child(*i, true);
}
}
MidiTimeAxisView::show_existing_automation ()
{
if (midi_track()) {
- const set<Parameter> params = midi_track()->midi_diskstream()->
+ const set<Evoral::Parameter> params = midi_track()->midi_diskstream()->
midi_playlist()->contained_automation();
- for (set<Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
+ for (set<Evoral::Parameter>::const_iterator i = params.begin(); i != params.end(); ++i) {
create_automation_child(*i, true);
}
}
MidiTimeAxisView::add_cc_track()
{
int response;
- Parameter param;
+ Evoral::Parameter param(0, 0, 0);
{
AddMidiCCTrackDialog dialog;
- dialog.set_transient_for(editor);
+ dialog.set_transient_for (_editor);
response = dialog.run();
-
+
if (response == Gtk::RESPONSE_ACCEPT)
param = dialog.parameter();
}
- if (response == Gtk::RESPONSE_ACCEPT)
+ if (param.type() != 0 && response == Gtk::RESPONSE_ACCEPT)
create_automation_child(param, true);
}
/** Add an automation track for the given parameter (pitch bend, channel pressure).
*/
void
-MidiTimeAxisView::add_parameter_track(const Parameter& param)
+MidiTimeAxisView::add_parameter_track(const Evoral::Parameter& param)
{
- create_automation_child(param, true);
+ if ( !EventTypeMap::instance().is_midi_parameter(param) ) {
+ error << "MidiTimeAxisView: unknown automation child "
+ << ARDOUR::EventTypeMap::instance().to_symbol(param) << endmsg;
+ return;
+ }
+
+ // create the parameter lane for each selected channel
+ uint16_t selected_channels = _channel_selector.get_selected_channels();
+
+ for (uint8_t i = 0; i < 16; i++) {
+ if (selected_channels & (0x0001 << i)) {
+ Evoral::Parameter param_with_channel(param.type(), i, param.id());
+ create_automation_child(param_with_channel, true);
+ }
+ }
}
void
-MidiTimeAxisView::create_automation_child (const Parameter& param, bool show)
+MidiTimeAxisView::create_automation_child (const Evoral::Parameter& param, bool show)
{
- if ( param.type() == MidiCCAutomation ||
- param.type() == MidiPgmChangeAutomation ||
- param.type() == MidiPitchBenderAutomation ||
- param.type() == MidiChannelPressureAutomation
- ) {
-
- /* These controllers are region "automation", so we do not create
- * an AutomationList/Line for the track */
-
- AutomationTracks::iterator existing = _automation_tracks.find(param);
- if (existing != _automation_tracks.end())
- return;
-
- boost::shared_ptr<AutomationControl> c
- = boost::dynamic_pointer_cast<AutomationControl>(_route->data().control(param));
-
- if (!c) {
- c = boost::dynamic_pointer_cast<AutomationControl>(_route->control_factory(param));
- _route->add_control(c);
- }
-
- boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
- _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
- editor,
- *this,
- true,
- parent_canvas,
- _route->describe_parameter(param)));
-
- add_automation_child(param, track, show);
+ /* These controllers are region "automation", so we do not create
+ * an AutomationList/Line for the track */
- } else {
- error << "MidiTimeAxisView: unknown automation child " << param.symbol() << endmsg;
+ if (param.type() == NullAutomation) {
+ cerr << "WARNING: Attempt to create NullAutomation child, ignoring" << endl;
+ return;
}
+
+ AutomationTracks::iterator existing = _automation_tracks.find(param);
+ if (existing != _automation_tracks.end())
+ return;
+
+ boost::shared_ptr<AutomationControl> c = _route->get_control (param);
+
+ assert(c);
+
+ boost::shared_ptr<AutomationTimeAxisView> track(new AutomationTimeAxisView (_session,
+ _route, boost::shared_ptr<ARDOUR::Automatable>(), c,
+ _editor,
+ *this,
+ true,
+ parent_canvas,
+ _route->describe_parameter(param)));
+
+ add_automation_child(param, track, show);
}
+
void
MidiTimeAxisView::route_active_changed ()
{
} else {
throw; // wha?
-
+
if (_route->active()) {
controls_ebox.set_name ("BusControlsBaseUnselected");
controls_base_selected_name = "BusControlsBaseSelected";
}
}
-void
-MidiTimeAxisView::channel_selector_toggled()
+void
+MidiTimeAxisView::start_step_editing ()
+{
+ step_edit_insert_position = _editor.get_preferred_edit_position ();
+ step_edit_beat_pos = 0;
+ step_edit_region = playlist()->top_region_at (step_edit_insert_position);
+
+ if (step_edit_region) {
+ RegionView* rv = view()->find_view (step_edit_region);
+ step_edit_region_view = dynamic_cast<MidiRegionView*> (rv);
+ } else {
+ step_edit_region_view = 0;
+ }
+
+ midi_track()->set_step_editing (true);
+}
+
+void
+MidiTimeAxisView::stop_step_editing ()
+{
+ midi_track()->set_step_editing (false);
+}
+
+void
+MidiTimeAxisView::check_step_edit ()
{
- static uint32_t previous_height;
-
- if(_midi_expander.property_expanded()) {
+ MidiRingBuffer<nframes_t>& incoming (midi_track()->step_edit_ring_buffer());
+ Evoral::Note<Evoral::MusicalTime> note;
+ uint8_t* buf;
+ uint32_t bufsize = 32;
+
+ buf = new uint8_t[bufsize];
+
+ while (incoming.read_space()) {
+ nframes_t time;
+ Evoral::EventType type;
+ uint32_t size;
- previous_height = current_height();
+ incoming.read_prefix (&time, &type, &size);
- if (previous_height < TimeAxisView::hLargest) {
- set_height (TimeAxisView::hLarge);
+ if (size > bufsize) {
+ delete [] buf;
+ bufsize = size;
+ buf = new uint8_t[bufsize];
}
- } else {
+ incoming.read_contents (size, buf);
+
+ if ((buf[0] & 0xf0) == MIDI_CMD_NOTE_ON) {
+
+ if (step_edit_region == 0) {
+
+ step_edit_region = add_region (step_edit_insert_position);
+ RegionView* rv = view()->find_view (step_edit_region);
+
+ if (rv) {
+ step_edit_region_view = dynamic_cast<MidiRegionView*>(rv);
+ } else {
+ fatal << X_("programming error: no view found for new MIDI region") << endmsg;
+ /*NOTREACHED*/
+ }
+ }
+
+ if (step_edit_region_view) {
+
+ bool success;
+ Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
+
+ if (!success) {
+ continue;
+ }
+
+ step_edit_region_view->add_note (buf[0] & 0xf, buf[1], buf[2], step_edit_beat_pos, beats);
+ step_edit_beat_pos += beats;
+ }
+ }
- set_height (previous_height);
}
}
+void
+MidiTimeAxisView::step_edit_rest ()
+{
+ bool success;
+ Evoral::MusicalTime beats = _editor.get_grid_type_as_beats (success, step_edit_insert_position);
+ step_edit_beat_pos += beats;
+}
+
+boost::shared_ptr<Region>
+MidiTimeAxisView::add_region (nframes64_t pos)
+{
+ Editor* real_editor = dynamic_cast<Editor*> (&_editor);
+
+ real_editor->begin_reversible_command (_("create region"));
+ XMLNode &before = playlist()->get_state();
+
+ nframes64_t start = pos;
+ real_editor->snap_to (start, -1);
+ const Meter& m = _session.tempo_map().meter_at(start);
+ const Tempo& t = _session.tempo_map().tempo_at(start);
+ double length = floor (m.frames_per_bar(t, _session.frame_rate()));
+ const boost::shared_ptr<MidiDiskstream> diskstream =
+ boost::dynamic_pointer_cast<MidiDiskstream>(view()->trackview().track()->diskstream());
+ boost::shared_ptr<Source> src = _session.create_midi_source_for_session (*diskstream.get());
+
+ boost::shared_ptr<Region> region = (RegionFactory::create (src, 0, (nframes_t) length,
+ PBD::basename_nosuffix(src->name())));
+
+ playlist()->add_region (region, start);
+ XMLNode &after = playlist()->get_state();
+ _session.add_command (new MementoCommand<Playlist> (*playlist().get(), &before, &after));
+
+ real_editor->commit_reversible_command();
+
+ return region;
+}