make MIDI thru work even when not rolling; add GUI control over MIDI thru (midi track context menu); add "default channel" concept for MIDI tracks so that piano roll header events can send stuff on the right channel; add GUI control over this channel setting

git-svn-id: svn://localhost/ardour2/branches/3.0@5687 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/midi_time_axis.cc

@@ -108,6 +108,9 @@ MidiTimeAxisView::MidiTimeAxisView (PublicEditor& ed, Session& sess,
 	, _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");
 
@@ -301,8 +304,57 @@ MidiTimeAxisView::append_extra_display_menu_items ()
 			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

gtk2_ardour/midi_time_axis.h

@@ -129,12 +129,17 @@ class MidiTimeAxisView : public RouteTimeAxisView
 	Gtk::ComboBoxText            _custom_device_mode_selector;
 
 	Gtk::CheckMenuItem*          _step_edit_item;
+	Gtk::CheckMenuItem*          _midi_thru_item;
+	Gtk::Menu*                    default_channel_menu;
 
 	nframes64_t step_edit_insert_position;
 	Evoral::MusicalTime step_edit_beat_pos;
 	boost::shared_ptr<ARDOUR::Region> step_edit_region;
 	MidiRegionView* step_edit_region_view;
 
+	Gtk::Menu* build_def_channel_menu();
+	void set_default_channel (int);
+	void toggle_midi_thru ();
 };
 
 #endif /* __ardour_midi_time_axis_h__ */

gtk2_ardour/piano_roll_header.cc

@@ -651,7 +651,7 @@ PianoRollHeader::send_note_on(uint8_t note)
 	//cerr << "note on: " << (int) note << endl;
 
 	if (track) {
-		_event[0] = MIDI_CMD_NOTE_ON;
+		_event[0] = (MIDI_CMD_NOTE_ON | track->default_channel());
 		_event[1] = note;
 		_event[2] = 100;
 
@@ -665,7 +665,7 @@ PianoRollHeader::send_note_off(uint8_t note)
 	boost::shared_ptr<ARDOUR::MidiTrack> track = _view.trackview().midi_track();
 
 	if (track) {
-		_event[0] = MIDI_CMD_NOTE_OFF;
+		_event[0] = (MIDI_CMD_NOTE_OFF | track->default_channel());
 		_event[1] = note;
 		_event[2] = 100;
 

libs/ardour/ardour/midi_track.h

@@ -84,6 +84,12 @@ public:
 	bool step_editing() const { return _step_editing; }
 	void set_step_editing (bool yn);
 	MidiRingBuffer<nframes_t>& step_edit_ring_buffer() { return _step_edit_ring_buffer; }
+
+	uint8_t default_channel() const { return _default_channel; }
+	void set_default_channel (uint8_t chn);
+
+	bool midi_thru() const { return _midi_thru; }
+	void set_midi_thru (bool yn);
 	
 protected:
 	XMLNode& state (bool full);
@@ -105,6 +111,9 @@ private:
 	MidiRingBuffer<nframes_t> _step_edit_ring_buffer;
 	NoteMode                  _note_mode;
 	bool                      _step_editing;
+	uint8_t                   _default_channel;
+	bool                      _midi_thru;
+
 	
 	int no_roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame, 
 		     bool state_changing, bool can_record, bool rec_monitors_input);

libs/ardour/midi_track.cc

@@ -55,6 +55,8 @@ MidiTrack::MidiTrack (Session& sess, string name, Route::Flag flag, TrackMode mo
 	, _step_edit_ring_buffer(64) // FIXME: size?
 	, _note_mode(Sustained)
 	, _step_editing (false)
+	, _default_channel (0)
+	, _midi_thru (true)
 {
 	use_new_diskstream ();
 
@@ -70,6 +72,8 @@ MidiTrack::MidiTrack (Session& sess, const XMLNode& node)
 	, _step_edit_ring_buffer(64) // FIXME: size?
 	, _note_mode(Sustained)
 	, _step_editing (false)
+	, _default_channel (0)
+	, _midi_thru (true)
 {
 	_set_state(node, false);
 }
@@ -175,6 +179,14 @@ MidiTrack::_set_state (const XMLNode& node, bool call_base)
 		_note_mode = Sustained;
 	}
 
+	if ((prop = node.property ("midi-thru")) != 0) {
+		set_midi_thru (prop->value() == "yes");
+	}
+
+	if ((prop = node.property ("default-channel")) != 0) {
+		set_default_channel ((uint8_t) atoi (prop->value()));
+	}
+
 	if ((prop = node.property ("diskstream-id")) == 0) {
 		
 		/* some old sessions use the diskstream name rather than the ID */
@@ -284,6 +296,9 @@ MidiTrack::state(bool full_state)
 
 	root.add_property ("step-editing", (_step_editing ? "yes" : "no"));
 	root.add_property ("note-mode", enum_2_string (_note_mode));
+	root.add_property ("midi-thru", (_midi_thru ? "yes" : "no"));
+	snprintf (buf, sizeof (buf), "%d", (int) _default_channel);
+	root.add_property ("default-channel", buf);
 	
 	return root;
 }
@@ -450,11 +465,6 @@ MidiTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame,
 
 		write_out_of_band_data (bufs, start_frame, end_frame, nframes);	
 
-		/* send incoming data "through" output */
-		if (_input->n_ports().n_midi()) {
-			mbuf.merge_in_place (_input->midi(0)->get_midi_buffer(nframes));
-		}
-
 		// Feed the data through the MidiStateTracker
 		bool did_loop;
 
@@ -535,8 +545,14 @@ MidiTrack::write_out_of_band_data (BufferSet& bufs, sframes_t /*start*/, sframes
 
 	MidiBuffer& buf (bufs.get_midi (0));
 	_immediate_events.read (buf, 0, 0, nframes - 1); // all stamps = 0
+
+	/* MIDI thru: send incoming data "through" output */
+	if (_midi_thru && _input->n_ports().n_midi()) {
+		buf.merge_in_place (_input->midi(0)->get_midi_buffer(nframes));
+	}
 }
 
+
 int
 MidiTrack::export_stuff (BufferSet& /*bufs*/, nframes_t /*nframes*/, sframes_t /*end_frame*/)
 {
@@ -678,3 +694,15 @@ MidiTrack::set_step_editing (bool yn)
 {
 	_step_editing = yn;
 }
+
+void
+MidiTrack::set_default_channel (uint8_t chn)
+{
+	_default_channel = std::min ((unsigned int) chn, 15U);
+}
+
+void
+MidiTrack::set_midi_thru (bool yn)
+{
+	_midi_thru = yn;
+}