C++ implementation of fan_out_instrument.lua

gtk2_ardour/mixer_strip.cc

@@ -1696,6 +1696,11 @@ MixerStrip::build_route_ops_menu ()
 		items.push_back (MenuElem (_("Pin Connections..."), sigc::mem_fun (*this, &RouteUI::manage_pins)));
 	}
 
+	if (_route->the_instrument () && _route->the_instrument ()->output_streams().n_audio() > 2) {
+		// TODO ..->n_audio() > 1 && separate_output_groups) hard to check here every time.
+		items.push_back (MenuElem (_("Fan Out Instrument"), sigc::bind (sigc::mem_fun (*this, &RouteUI::fan_out), false)));
+	}
+
 	items.push_back (SeparatorElem());
 	items.push_back (MenuElem (_("Adjust Latency..."), sigc::mem_fun (*this, &RouteUI::adjust_latency)));
 

gtk2_ardour/route_ui.cc

@@ -17,6 +17,7 @@
 
 */
 
+#include <map>
 #include <boost/algorithm/string.hpp>
 
 #include <gtkmm2ext/gtk_ui.h>
@@ -38,11 +39,13 @@
 #include "ardour/vca.h"
 #include "ardour/vca_manager.h"
 #include "ardour/audio_track.h"
+#include "ardour/audio_port.h"
 #include "ardour/audioengine.h"
 #include "ardour/filename_extensions.h"
 #include "ardour/midi_track.h"
 #include "ardour/monitor_control.h"
 #include "ardour/internal_send.h"
+#include "ardour/panner_shell.h"
 #include "ardour/profile.h"
 #include "ardour/phase_control.h"
 #include "ardour/send.h"
@@ -2334,6 +2337,54 @@ RouteUI::manage_pins ()
 	}
 }
 
+void
+RouteUI::fan_out (bool to_busses)
+{
+	boost::shared_ptr<PluginInsert> pi = boost::dynamic_pointer_cast<PluginInsert> (_route->the_instrument ());
+	assert (pi);
+
+	const uint32_t n_outputs = pi->output_streams ().n_audio ();
+	if (_route->n_outputs ().n_audio () != n_outputs) {
+		MessageDialog msg (string_compose (
+					_("The Plugin's number of audio outputs ports (%1) does not match the Tracks's number of audio outputs (%2). Cannot fan out."),
+					n_outputs, _route->n_outputs ().n_audio ()));
+		msg.run ();
+		return;
+	}
+	boost::shared_ptr<Plugin> plugin = pi->plugin ();
+	std::map<std::string, uint32_t> busnames;
+	for (uint32_t p = 0; p < n_outputs; ++p) {
+		const Plugin::IOPortDescription& pd (plugin->describe_io_port (DataType::AUDIO, false, p));
+		std::string bn = pi->name () + " " + pd.group_name;
+		busnames[bn]++;
+	}
+
+	if (busnames.size () < 2) {
+		MessageDialog msg (_("Instrument has only 1 output bus. Nothing to fan out."));
+		msg.run ();
+		return;
+	}
+
+	uint32_t outputs = 2;
+	if (_session->master_out ()) {
+		outputs = std::max (outputs, _session->master_out ()->n_inputs ().n_audio ());
+	}
+
+	_route->output ()->disconnect (this);
+	_route->panner_shell ()->set_bypassed (true);
+
+	for (uint32_t p = 0; p < n_outputs; ++p) {
+		const Plugin::IOPortDescription& pd (plugin->describe_io_port (DataType::AUDIO, false, p));
+		std::string bn = pi->name () + " " + pd.group_name;
+		boost::shared_ptr<Route> r = _session->route_by_name (bn);
+		if (!r) {
+			RouteList rl = _session->new_audio_route (busnames[bn], outputs, NULL, 1, bn, PresentationInfo::AudioBus, PresentationInfo::max_order);
+			r = rl.front ();
+		}
+		_route->output ()->audio (p)->connect (r->input ()->audio (pd.group_channel).get());
+	}
+}
+
 bool
 RouteUI::mark_hidden (bool yn)
 {

gtk2_ardour/route_ui.h

@@ -208,6 +208,7 @@ class RouteUI : public virtual ARDOUR::SessionHandlePtr, public virtual PBD::Sco
 
 	void manage_pins ();
 	void maybe_add_route_print_mgr ();
+	void fan_out (bool to_busses = true);
 
 	virtual void route_property_changed (const PBD::PropertyChange&) = 0;
 	void route_removed ();