Region export dialog: Make export channel and -selector polymorphic, add the region related classes and a dialog specialization

git-svn-id: svn://localhost/ardour2/branches/3.0@3915 d708f5d6-7413-0410-9779-e7cbd77b26cf

14 files changed, 537 insertions, 115 deletions

diff --git a/gtk2_ardour/editor_export_audio.cc b/gtk2_ardour/editor_export_audio.cc
index b382200d38..621482f0f1 100644
--- a/gtk2_ardour/editor_export_audio.cc
+++ b/gtk2_ardour/editor_export_audio.cc
@@ -91,17 +91,25 @@ Editor::export_range ()
 void
 Editor::export_region ()
 {
-// 	if (selection->regions.empty()) {
-// 		return;
-// 	}
-// 
-// 	boost::shared_ptr<Region> r = selection->regions.front()->region();
-// 	
-// 	ExportDialog* dialog = new ExportRegionDialog (*this, r);
-// 		
-// 	dialog->connect_to_session (session);
-// 	dialog->set_range (clicked_regionview->region()->first_frame(), clicked_regionview->region()->last_frame());
-// 	dialog->start_export();
+	if (selection->regions.empty()) {
+		return;
+	}
+	
+	try {
+		boost::shared_ptr<Region> r = selection->regions.front()->region();
+		AudioRegion & region (dynamic_cast<AudioRegion &> (*r));
+		
+		RouteTimeAxisView & rtv (dynamic_cast<RouteTimeAxisView &> (selection->regions.front()->get_time_axis_view()));
+		AudioTrack & track (dynamic_cast<AudioTrack &> (*rtv.route()));
+		
+		ExportRegionDialog dialog (*this, region, track);
+		dialog.set_session (session);
+		dialog.run();
+		
+	} catch (std::bad_cast & e) {
+		error << "Exporting Region failed!" << endmsg;
+		return;
+	}
 }
 
 int
diff --git a/gtk2_ardour/export_channel_selector.cc b/gtk2_ardour/export_channel_selector.cc
index 41ecec9094..e26d05d7c8 100644
--- a/gtk2_ardour/export_channel_selector.cc
+++ b/gtk2_ardour/export_channel_selector.cc
@@ -39,7 +39,7 @@
 using namespace ARDOUR;
 using namespace PBD;
 
-ExportChannelSelector::ExportChannelSelector () :
+PortExportChannelSelector::PortExportChannelSelector () :
   channels_label (_("Channels:"), Gtk::ALIGN_LEFT),
   split_checkbox (_("Split to mono files")),
   max_channels (20),
@@ -68,11 +68,11 @@ ExportChannelSelector::ExportChannelSelector () :
 	channels_spinbutton.set_range (1, max_channels);
 	channels_spinbutton.set_value (2);
 	
-	channels_spinbutton.signal_value_changed().connect (sigc::mem_fun (*this, &ExportChannelSelector::update_channel_count));
+	channels_spinbutton.signal_value_changed().connect (sigc::mem_fun (*this, &PortExportChannelSelector::update_channel_count));
 	
 	/* Other signals */
 	
-	split_checkbox.signal_toggled().connect (sigc::mem_fun (*this, &ExportChannelSelector::update_split_state));
+	split_checkbox.signal_toggled().connect (sigc::mem_fun (*this, &PortExportChannelSelector::update_split_state));
 	channel_view.CriticalSelectionChanged.connect (CriticalSelectionChanged.make_slot());
 	
 	/* Finalize */
@@ -81,7 +81,7 @@ ExportChannelSelector::ExportChannelSelector () :
 	
 }
 
-ExportChannelSelector::~ExportChannelSelector ()
+PortExportChannelSelector::~PortExportChannelSelector ()
 {
 // 	if (session) {
 // 		session->add_instant_xml (get_state(), false);
@@ -89,7 +89,7 @@ ExportChannelSelector::~ExportChannelSelector ()
 }
 
 void
-ExportChannelSelector::set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_)
+PortExportChannelSelector::set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_)
 {
 	state = state_;
 	session = session_;
@@ -102,7 +102,7 @@ ExportChannelSelector::set_state (ARDOUR::ExportProfileManager::ChannelConfigSta
 }
 
 void
-ExportChannelSelector::fill_route_list ()
+PortExportChannelSelector::fill_route_list ()
 {
 	channel_view.clear_routes ();
 	Session::RouteList routes = *session->get_routes();
@@ -123,7 +123,7 @@ ExportChannelSelector::fill_route_list ()
 }
 
 void
-ExportChannelSelector::update_channel_count ()
+PortExportChannelSelector::update_channel_count ()
 {
 	uint32_t chans = static_cast<uint32_t> (channels_spinbutton.get_value());
 	channel_view.set_channel_count (chans);
@@ -131,14 +131,14 @@ ExportChannelSelector::update_channel_count ()
 }
 
 void
-ExportChannelSelector::update_split_state ()
+PortExportChannelSelector::update_split_state ()
 {
 	state->config->set_split (split_checkbox.get_active());
 	CriticalSelectionChanged();
 }
 
 void
-ExportChannelSelector::RouteCols::add_channels (uint32_t chans)
+PortExportChannelSelector::RouteCols::add_channels (uint32_t chans)
 {
 	while (chans > 0) {
 		channels.push_back (Channel (*this));
@@ -147,8 +147,8 @@ ExportChannelSelector::RouteCols::add_channels (uint32_t chans)
 	}
 }
 
-ExportChannelSelector::RouteCols::Channel &
-ExportChannelSelector::RouteCols::get_channel (uint32_t channel)
+PortExportChannelSelector::RouteCols::Channel &
+PortExportChannelSelector::RouteCols::get_channel (uint32_t channel)
 {
 	if (channel > n_channels) {
 		std::cout << "Invalid channel cout for get_channel!" << std::endl;
@@ -164,7 +164,7 @@ ExportChannelSelector::RouteCols::get_channel (uint32_t channel)
 	return *it;
 }
 
-ExportChannelSelector::ChannelTreeView::ChannelTreeView (uint32_t max_channels) :
+PortExportChannelSelector::ChannelTreeView::ChannelTreeView (uint32_t max_channels) :
   n_channels (0)
 {
 	/* Main columns */
@@ -186,13 +186,13 @@ ExportChannelSelector::ChannelTreeView::ChannelTreeView (uint32_t max_channels)
 	column->add_attribute (text_renderer->property_text(), route_cols.name);
 	
 	Gtk::CellRendererToggle *toggle = dynamic_cast<Gtk::CellRendererToggle *>(get_column_cell_renderer (0));
-	toggle->signal_toggled().connect (mem_fun (*this, &ExportChannelSelector::ChannelTreeView::update_toggle_selection));
+	toggle->signal_toggled().connect (mem_fun (*this, &PortExportChannelSelector::ChannelTreeView::update_toggle_selection));
 	
 	static_columns = get_columns().size();
 }
 
 void
-ExportChannelSelector::ChannelTreeView::set_config (ChannelConfigPtr c)
+PortExportChannelSelector::ChannelTreeView::set_config (ChannelConfigPtr c)
 {
 	/* TODO Without the following line, the state might get reset.
 	 * Pointing to the same address does not mean the state of the configuration hasn't changed.
@@ -208,6 +208,11 @@ ExportChannelSelector::ChannelTreeView::set_config (ChannelConfigPtr c)
 	
 		for (Gtk::ListStore::Children::iterator r_it = route_list->children().begin(); r_it != route_list->children().end(); ++r_it) {
 			
+			ARDOUR::PortExportChannel * pec;
+			if (!(pec = dynamic_cast<ARDOUR::PortExportChannel *> (c_it->get()))) {
+				continue;
+			}
+			
 			Glib::RefPtr<Gtk::ListStore> port_list = r_it->get_value (route_cols.port_list_col);
 			std::set<AudioPort *> route_ports;
 			std::set<AudioPort *> intersection;
@@ -219,7 +224,7 @@ ExportChannelSelector::ChannelTreeView::set_config (ChannelConfigPtr c)
 				                                                    (*p_it)->get_value (route_cols.port_cols.label)));
 			}
 			
-			std::set_intersection ((*c_it)->begin(), (*c_it)->end(),
+			std::set_intersection (pec->get_ports().begin(), pec->get_ports().end(),
 			                       route_ports.begin(), route_ports.end(),
 			                       std::insert_iterator<std::set<AudioPort *> > (intersection, intersection.begin()));
 			
@@ -253,7 +258,7 @@ ExportChannelSelector::ChannelTreeView::set_config (ChannelConfigPtr c)
 }
 
 void
-ExportChannelSelector::ChannelTreeView::add_route (ARDOUR::IO * route)
+PortExportChannelSelector::ChannelTreeView::add_route (ARDOUR::IO * route)
 {
 	Gtk::TreeModel::iterator iter = route_list->append();
 	Gtk::TreeModel::Row row = *iter;
@@ -291,7 +296,7 @@ ExportChannelSelector::ChannelTreeView::add_route (ARDOUR::IO * route)
 }
 
 void
-ExportChannelSelector::ChannelTreeView::set_channel_count (uint32_t channels)
+PortExportChannelSelector::ChannelTreeView::set_channel_count (uint32_t channels)
 {
 	int offset = channels - n_channels;
 	
@@ -315,7 +320,7 @@ ExportChannelSelector::ChannelTreeView::set_channel_count (uint32_t channels)
 		column->add_attribute (combo_renderer->property_model(), route_cols.port_list_col);
 		column->add_attribute (combo_renderer->property_editable(), route_cols.selected);
 		
-		combo_renderer->signal_edited().connect (sigc::bind (sigc::mem_fun (*this, &ExportChannelSelector::ChannelTreeView::update_selection_text), n_channels));
+		combo_renderer->signal_edited().connect (sigc::bind (sigc::mem_fun (*this, &PortExportChannelSelector::ChannelTreeView::update_selection_text), n_channels));
 		
 		/* put data into view */
 		
@@ -344,7 +349,7 @@ ExportChannelSelector::ChannelTreeView::set_channel_count (uint32_t channels)
 }
 
 void
-ExportChannelSelector::ChannelTreeView::update_config ()
+PortExportChannelSelector::ChannelTreeView::update_config ()
 {
 
 	if (!config) { return; }
@@ -353,7 +358,8 @@ ExportChannelSelector::ChannelTreeView::update_config ()
 
 	for (uint32_t i = 1; i <= n_channels; ++i) {
 	
-		boost::shared_ptr<ExportChannel> channel (new ExportChannel ());
+		ExportChannelPtr channel (new PortExportChannel ());
+		PortExportChannel * pec = static_cast<PortExportChannel *> (channel.get());
 	
 		for (Gtk::ListStore::Children::iterator it = route_list->children().begin(); it != route_list->children().end(); ++it) {
 			Gtk::TreeModel::Row row = *it;
@@ -364,7 +370,7 @@ ExportChannelSelector::ChannelTreeView::update_config ()
 			
 			AudioPort * port = row[route_cols.get_channel (i).port];
 			if (port) {
-				channel->add_port (port);
+				pec->add_port (port);
 			}
 		}
 		
@@ -375,7 +381,7 @@ ExportChannelSelector::ChannelTreeView::update_config ()
 }
 
 void
-ExportChannelSelector::ChannelTreeView::update_toggle_selection (Glib::ustring const & path)
+PortExportChannelSelector::ChannelTreeView::update_toggle_selection (Glib::ustring const & path)
 {
 	Gtk::TreeModel::iterator iter = get_model ()->get_iter (path);
 	bool selected = iter->get_value (route_cols.selected);
@@ -408,7 +414,7 @@ ExportChannelSelector::ChannelTreeView::update_toggle_selection (Glib::ustring c
 }
 
 void
-ExportChannelSelector::ChannelTreeView::update_selection_text (Glib::ustring const & path, Glib::ustring const & new_text, uint32_t channel)
+PortExportChannelSelector::ChannelTreeView::update_selection_text (Glib::ustring const & path, Glib::ustring const & new_text, uint32_t channel)
 {
 	Gtk::TreeModel::iterator iter = get_model ()->get_iter (path);
 	iter->set_value (route_cols.get_channel (channel).label, new_text);
@@ -425,3 +431,66 @@ ExportChannelSelector::ChannelTreeView::update_selection_text (Glib::ustring con
 	
 	update_config ();
 }
+
+RegionExportChannelSelector::RegionExportChannelSelector (ARDOUR::AudioRegion const & region, ARDOUR::AudioTrack & track) :
+  session (0),
+  region (region),
+  track (track),
+  region_chans (region.n_channels()),
+  track_chans (track.n_outputs().n_audio()),
+
+  raw_button (type_group),
+  processed_button (type_group)
+{
+	pack_start (vbox);
+
+	raw_button.set_label (string_compose (_("Raw region export, no fades or plugins (%1 channels)"), region_chans));
+	raw_button.signal_toggled ().connect (sigc::mem_fun (*this, &RegionExportChannelSelector::handle_selection));
+	vbox.pack_start (raw_button);
+	
+	processed_button.set_label (string_compose (_("Processed region export with fades and plugins applied (%1 channels)"), track_chans));
+	processed_button.signal_toggled ().connect (sigc::mem_fun (*this, &RegionExportChannelSelector::handle_selection));
+	vbox.pack_start (processed_button);
+	
+	vbox.show_all_children ();
+	show_all_children ();
+}
+
+void
+RegionExportChannelSelector::set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_)
+{
+	state = state_;
+	session = session_;
+	
+	handle_selection ();
+}
+
+void
+RegionExportChannelSelector::handle_selection ()
+{
+	if (!state) {
+		return;
+	}
+
+	state->config->clear_channels ();
+	
+	if (raw_button.get_active ()) {
+	
+		factory.reset (new RegionExportChannelFactory (session, region, track, RegionExportChannelFactory::Raw));
+		
+		for (size_t chan = 0; chan < region_chans; ++chan) {
+			state->config->register_channel (factory->create (chan));
+		}
+		
+	} else if (processed_button.get_active ()) {
+	
+		factory.reset (new RegionExportChannelFactory(session, region, track, RegionExportChannelFactory::Processed));
+		
+		for (size_t chan = 0; chan < region_chans; ++chan) {
+			state->config->register_channel (factory->create (chan));
+		}
+		
+	}
+	
+	CriticalSelectionChanged ();
+}
diff --git a/gtk2_ardour/export_channel_selector.h b/gtk2_ardour/export_channel_selector.h
index 0faf652bd8..c2e99940aa 100644
--- a/gtk2_ardour/export_channel_selector.h
+++ b/gtk2_ardour/export_channel_selector.h
@@ -24,6 +24,7 @@
 #include <list>
 
 #include <ardour/export_profile_manager.h>
+#include <ardour/export_channel.h>
 
 #include <gtkmm.h>
 #include <sigc++/signal.h>
@@ -31,31 +32,39 @@
 
 namespace ARDOUR {
 	class Session;
-	class ExportChannel;
 	class ExportChannelConfiguration;
+	class RegionExportChannelFactory;
 	class ExportHandler;
 	class AudioPort;
 	class IO;
+	class AudioRegion;
+	class AudioTrack;
 }
 
 class XMLNode;
 
-/// 
-class ExportChannelSelector : public Gtk::HBox {
-  private:
-
+class ExportChannelSelector : public Gtk::HBox
+{
+  protected:
 	typedef boost::shared_ptr<ARDOUR::ExportChannelConfiguration> ChannelConfigPtr;
-	
 	typedef boost::shared_ptr<ARDOUR::ExportHandler> HandlerPtr;
 
   public:
+	virtual ~ExportChannelSelector () {}
+	
+	virtual void set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_) = 0;
+	sigc::signal<void> CriticalSelectionChanged;
+};
+
+class PortExportChannelSelector : public ExportChannelSelector
+{
 
-	ExportChannelSelector ();
-	~ExportChannelSelector ();
+  public:
+
+	PortExportChannelSelector ();
+	~PortExportChannelSelector ();
 	
 	void set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_);
-	
-	sigc::signal<void> CriticalSelectionChanged;
 
   private:
 
@@ -63,8 +72,7 @@ class ExportChannelSelector : public Gtk::HBox {
 	void update_channel_count ();
 	void update_split_state ();
 
-	typedef boost::shared_ptr<ARDOUR::ExportChannel> ChannelPtr;
-	typedef std::list<ChannelPtr> CahnnelList;
+	typedef std::list<ARDOUR::ExportChannelPtr> CahnnelList;
 
 	ARDOUR::Session * session;
 	ARDOUR::ExportProfileManager::ChannelConfigStatePtr state;
@@ -178,4 +186,33 @@ class ExportChannelSelector : public Gtk::HBox {
 
 };
 
+class RegionExportChannelSelector : public ExportChannelSelector
+{
+  public:
+	RegionExportChannelSelector (ARDOUR::AudioRegion const & region, ARDOUR::AudioTrack & track);
+	
+	virtual void set_state (ARDOUR::ExportProfileManager::ChannelConfigStatePtr const state_, ARDOUR::Session * session_);
+
+  private:
+
+	void handle_selection ();
+
+	ARDOUR::Session * session;
+	ARDOUR::ExportProfileManager::ChannelConfigStatePtr state;
+	boost::shared_ptr<ARDOUR::RegionExportChannelFactory> factory;
+	ARDOUR::AudioRegion const & region;
+	ARDOUR::AudioTrack & track;
+	
+	uint32_t region_chans;
+	uint32_t track_chans;
+	
+	/*** GUI components ***/
+	
+	Gtk::VBox             vbox;
+	
+	Gtk::RadioButtonGroup type_group;
+	Gtk::RadioButton      raw_button;
+	Gtk::RadioButton      processed_button;
+};
+
 #endif /* __export_channel_selector_h__ */
diff --git a/gtk2_ardour/export_dialog.cc b/gtk2_ardour/export_dialog.cc
index 7ae81a016a..86263c8d3f 100644
--- a/gtk2_ardour/export_dialog.cc
+++ b/gtk2_ardour/export_dialog.cc
@@ -45,8 +45,6 @@ ExportDialog::~ExportDialog ()
 void
 ExportDialog::set_session (ARDOUR::Session* s)
 {
-	init ();
-
 	session = s;
 	
 	/* Init handler and profile manager */
@@ -55,6 +53,12 @@ ExportDialog::set_session (ARDOUR::Session* s)
 	status = session->get_export_status ();
 	profile_manager.reset (new ExportProfileManager (*session));
 	
+	/* Possibly init stuff in derived classes */
+	
+	init ();
+	
+	/* Rest of session related initialization */
+	
 	preset_selector->set_manager (profile_manager);
 	file_notebook->set_session_and_manager (session, profile_manager);
 	
@@ -163,7 +167,7 @@ ExportDialog::init_components ()
 {
 	preset_selector.reset (new ExportPresetSelector ());
 	timespan_selector.reset (new ExportTimespanSelectorMultiple ());
-	channel_selector.reset (new ExportChannelSelector ());
+	channel_selector.reset (new PortExportChannelSelector ());
 	file_notebook.reset (new ExportFileNotebook ());
 }
 
@@ -358,7 +362,7 @@ ExportRangeDialog::init_components ()
 {
 	preset_selector.reset (new ExportPresetSelector ());
 	timespan_selector.reset (new ExportTimespanSelectorSingle (range_id));
-	channel_selector.reset (new ExportChannelSelector ());
+	channel_selector.reset (new PortExportChannelSelector ());
 	file_notebook.reset (new ExportFileNotebook ());
 }
 
@@ -371,6 +375,23 @@ ExportSelectionDialog::init_components ()
 {
 	preset_selector.reset (new ExportPresetSelector ());
 	timespan_selector.reset (new ExportTimespanSelectorSingle (X_("selection")));
-	channel_selector.reset (new ExportChannelSelector ());
+	channel_selector.reset (new PortExportChannelSelector ());
+	file_notebook.reset (new ExportFileNotebook ());
+}
+
+ExportRegionDialog::ExportRegionDialog (PublicEditor & editor, ARDOUR::AudioRegion const & region, ARDOUR::AudioTrack & track) :
+  ExportDialog (editor, _("Export Region")),
+  region (region),
+  track (track)
+{}
+
+void
+ExportRegionDialog::init_components ()
+{
+	Glib::ustring loc_id = profile_manager->set_single_range (region.position(), region.position() + region.length(), region.name());
+
+	preset_selector.reset (new ExportPresetSelector ());
+	timespan_selector.reset (new ExportTimespanSelectorSingle (loc_id));
+	channel_selector.reset (new RegionExportChannelSelector (region, track));
 	file_notebook.reset (new ExportFileNotebook ());
 }
diff --git a/gtk2_ardour/export_dialog.h b/gtk2_ardour/export_dialog.h
index c0c5a24b20..0de6c6ffac 100644
--- a/gtk2_ardour/export_dialog.h
+++ b/gtk2_ardour/export_dialog.h
@@ -63,6 +63,12 @@ class ExportDialog : public ArdourDialog {
 
   protected:
 
+	typedef boost::shared_ptr<ARDOUR::ExportHandler> HandlerPtr;
+	typedef boost::shared_ptr<ARDOUR::ExportProfileManager> ManagerPtr;
+	
+	HandlerPtr      handler;
+	ManagerPtr      profile_manager;
+
 	// initializes GUI layout
 	virtual void init_gui ();
 
@@ -94,13 +100,9 @@ class ExportDialog : public ArdourDialog {
 	void show_progress ();
 	gint progress_timeout ();
 	
-	typedef boost::shared_ptr<ARDOUR::ExportHandler> HandlerPtr;
-	typedef boost::shared_ptr<ARDOUR::ExportProfileManager> ManagerPtr;
 	typedef boost::shared_ptr<ARDOUR::ExportStatus> StatusPtr;
 	
 	PublicEditor &  editor;
-	HandlerPtr      handler;
-	ManagerPtr      profile_manager;
 	StatusPtr       status;
 	
 	/*** GUI components ***/
@@ -153,4 +155,16 @@ class ExportSelectionDialog : public ExportDialog
 	void init_components ();
 };
 
+class ExportRegionDialog : public ExportDialog
+{
+	public:
+	ExportRegionDialog (PublicEditor & editor, ARDOUR::AudioRegion const & region, ARDOUR::AudioTrack & track);
+
+  private:
+	void init_components ();
+	
+	ARDOUR::AudioRegion const & region;
+	ARDOUR::AudioTrack & track;
+};
+
 #endif /* __ardour_export_dialog_h__ */
diff --git a/libs/ardour/SConscript b/libs/ardour/SConscript
index 2abf18cd55..162994fc81 100644
--- a/libs/ardour/SConscript
+++ b/libs/ardour/SConscript
@@ -70,6 +70,7 @@ element_importer.cc
 element_import_handler.cc
 enums.cc
 event_type_map.cc
+export_channel.cc
 export_channel_configuration.cc
 export_file_io.cc
 export_filename.cc
diff --git a/libs/ardour/ardour/export_channel.h b/libs/ardour/ardour/export_channel.h
new file mode 100644
index 0000000000..dd351bfd70
--- /dev/null
+++ b/libs/ardour/ardour/export_channel.h
@@ -0,0 +1,144 @@
+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sakari Bergen
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifndef __ardour_export_channel_h__
+#define __ardour_export_channel_h__
+
+#include <ardour/audioregion.h>
+#include <ardour/audio_track.h>
+#include <ardour/buffer_set.h>
+
+#include <set>
+
+#include <boost/shared_ptr.hpp>
+#include <sigc++/signal.h>
+
+namespace ARDOUR {
+
+class Session;
+
+/// Export channel base class interface for different source types
+class ExportChannel
+{
+  public:
+	virtual void read (Sample * data, nframes_t frames) const = 0;
+	virtual bool empty () const = 0;
+	
+	/// Adds state to node passed
+	virtual void get_state (XMLNode * node) const = 0;
+	
+	/// Sets state from node passed
+	virtual void set_state (XMLNode * node, Session & session) = 0;
+	
+	// Operator< must be defined for usage in e.g. std::map or std::set to disallow duplicates when necessary
+	virtual bool operator< (ExportChannel const & other) const = 0;
+};
+
+/// Safe pointer for storing ExportChannels in ordered STL containers
+class ExportChannelPtr : public boost::shared_ptr<ExportChannel>
+{
+  public:
+	ExportChannelPtr () {}
+	template<typename Y> explicit ExportChannelPtr (Y * ptr) : boost::shared_ptr<ExportChannel> (ptr) {}
+
+	bool operator< (ExportChannelPtr const & other) const { return **this < *other; }
+};
+
+/// Basic export channel that reads from AudioPorts
+class PortExportChannel : public ExportChannel
+{
+  public:
+	typedef std::set<AudioPort *> PortSet;
+
+	PortExportChannel () {}
+	
+	virtual void read (Sample * data, nframes_t frames) const;
+	virtual bool empty () const { return ports.empty(); }
+	
+	virtual void get_state (XMLNode * node) const;
+	virtual void set_state (XMLNode * node, Session & session);
+	
+	virtual bool operator< (ExportChannel const & other) const;
+
+	void add_port (AudioPort * port) { ports.insert (port); }
+	PortSet const & get_ports () { return ports; }
+
+  private:
+	PortSet ports;
+};
+
+/// Handles RegionExportChannels and does actual reading from region
+class RegionExportChannelFactory : public sigc::trackable
+{
+  public:
+	enum Type {
+		Raw,
+		Processed
+	};
+	
+	RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type);
+
+	ExportChannelPtr create (uint32_t channel);
+	void read (uint32_t channel, Sample * data, nframes_t frames_to_read);
+	
+  private:
+
+	int new_cycle_started () { buffers_up_to_date = false; return 0; }
+	void update_buffers (nframes_t frames);
+
+	AudioRegion const & region;
+	AudioTrack & track;
+	Type type;
+
+	nframes_t frames_per_cycle;
+	size_t n_channels;
+	BufferSet buffers;
+	bool buffers_up_to_date;
+	nframes_t region_start;
+	nframes_t position;
+};
+
+/// Export channel that reads from region channel
+class RegionExportChannel : public ExportChannel
+{
+	friend class RegionExportChannelFactory;
+
+  public:
+	virtual void read (Sample * data, nframes_t frames_to_read) const { factory.read (channel, data, frames_to_read); }
+	virtual void get_state (XMLNode * node) const {};
+	virtual void set_state (XMLNode * node, Session & session) {};
+	virtual bool empty () const { return false; }
+	// Region export should never have duplicate channels, so there need not be any semantics here
+	virtual bool operator< (ExportChannel const & other) const { return this < &other; }
+
+  private:
+
+	RegionExportChannel (RegionExportChannelFactory & factory, uint32_t channel) :
+	  factory (factory),
+	  channel (channel)
+	{}
+	
+	RegionExportChannelFactory & factory;
+	uint32_t channel;
+};
+
+} // namespace ARDOUR
+
+#endif
diff --git a/libs/ardour/ardour/export_channel_configuration.h b/libs/ardour/ardour/export_channel_configuration.h
index 80ad29b435..7223e29110 100644
--- a/libs/ardour/ardour/export_channel_configuration.h
+++ b/libs/ardour/ardour/export_channel_configuration.h
@@ -21,12 +21,12 @@
 #ifndef __ardour_export_channel_configuration_h__
 #define __ardour_export_channel_configuration_h__
 
-#include <set>
 #include <list>
 
 #include <glibmm/ustring.h>
 #include <sigc++/signal.h>
 
+#include <ardour/export_channel.h>
 #include <ardour/export_status.h>
 #include <ardour/ardour.h>
 
@@ -46,13 +46,6 @@ class ExportProcessor;
 class ExportTimespan;
 class Session;
 
-class ExportChannel : public std::set<AudioPort *>
-{
-  public:
-	void add_port (AudioPort * port) { if (port) { insert (port); } }
-	void read_ports (float * data, nframes_t frames) const;
-};
-
 class ExportChannelConfiguration
 {
   private:
@@ -86,20 +79,19 @@ class ExportChannelConfiguration
 	XMLNode & get_state ();
 	int set_state (const XMLNode &);
 	
-	typedef boost::shared_ptr<ExportChannel const> ChannelPtr;
-	typedef std::list<ChannelPtr> ChannelList;
+	typedef std::list<ExportChannelPtr> ChannelList;
 	
-	ChannelList const & get_channels () { return channels; }
-	bool all_channels_have_ports ();
+	ChannelList const & get_channels () const { return channels; }
+	bool all_channels_have_ports () const;
 	
 	ustring name () const { return _name; }
 	void set_name (ustring name) { _name = name; }
 	void set_split (bool value) { split = value; }
 	
-	bool get_split () { return split; }
-	uint32_t get_n_chans () { return channels.size(); }
+	bool get_split () const { return split; }
+	uint32_t get_n_chans () const { return channels.size(); }
 	
-	void register_channel (ChannelPtr channel) { channels.push_back (channel); }
+	void register_channel (ExportChannelPtr channel) { channels.push_back (channel); }
 	void register_file_config (FormatPtr format, FilenamePtr filename) { file_configs.push_back (FileConfig (format, filename)); }
 	
 	void clear_channels () { channels.clear (); }
diff --git a/libs/ardour/ardour/export_profile_manager.h b/libs/ardour/ardour/export_profile_manager.h
index d2f1c162e0..74035572b0 100644
--- a/libs/ardour/ardour/export_profile_manager.h
+++ b/libs/ardour/ardour/export_profile_manager.h
@@ -144,6 +144,7 @@ class ExportProfileManager
 	typedef std::list<TimespanStatePtr> TimespanStateList;
 	
 	void set_selection_range (nframes_t start = 0, nframes_t end = 0);
+	std::string set_single_range (nframes_t start, nframes_t end, Glib::ustring name);
 	TimespanStateList const & get_timespans () { return check_list (timespans); }
 	
   private:
@@ -162,6 +163,9 @@ class ExportProfileManager
 	boost::shared_ptr<Location>     session_range;
 	boost::shared_ptr<Location>     selection_range;
 	boost::shared_ptr<LocationList> ranges;
+	
+	bool                            single_range_mode;
+	boost::shared_ptr<Location>     single_range;
 
 /* Channel Configs */
   public:
diff --git a/libs/ardour/ardour/export_timespan.h b/libs/ardour/ardour/export_timespan.h
index e19013e822..38f449a1a5 100644
--- a/libs/ardour/ardour/export_timespan.h
+++ b/libs/ardour/ardour/export_timespan.h
@@ -27,6 +27,7 @@
 #include <glibmm/ustring.h>
 
 #include <ardour/export_status.h>
+#include <ardour/export_channel.h>
 #include <ardour/ardour.h>
 
 using Glib::ustring;
@@ -41,8 +42,8 @@ class ExportTimespan : public sigc::trackable
 {
   private:
 	typedef boost::shared_ptr<ExportTempFile> TempFilePtr;
-	typedef std::pair<ExportChannel const, TempFilePtr> ChannelFilePair;
-	typedef std::map<ExportChannel const, TempFilePtr> TempFileMap;
+	typedef std::pair<ExportChannelPtr, TempFilePtr> ChannelFilePair;
+	typedef std::map<ExportChannelPtr, TempFilePtr> TempFileMap;
 	typedef boost::shared_ptr<ExportStatus> ExportStatusPtr;
 
   private:
@@ -59,13 +60,13 @@ class ExportTimespan : public sigc::trackable
 	void set_range_id (ustring range_id) { _range_id = range_id; }
 	
 	/// Registers a channel to be read when export starts rolling
-	void register_channel (ExportChannel const & channel);
+	void register_channel (ExportChannelPtr channel);
 	
 	/// "Rewinds" the tempfiles to start reading the beginnings again
 	void rewind ();
 	
 	/// Reads data from the tempfile belonging to channel into data
-	nframes_t get_data (float * data, nframes_t frames, ExportChannel const & channel);
+	nframes_t get_data (float * data, nframes_t frames, ExportChannelPtr channel);
 	
 	/// Reads data from each channel and writes to tempfile
 	int process (nframes_t frames);
diff --git a/libs/ardour/export_channel.cc b/libs/ardour/export_channel.cc
new file mode 100644
index 0000000000..e0242a9f52
--- /dev/null
+++ b/libs/ardour/export_channel.cc
@@ -0,0 +1,142 @@
+/*
+    Copyright (C) 2008 Paul Davis
+    Author: Sakari Bergen
+
+    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., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include <ardour/export_channel.h>
+
+#include <ardour/export_failed.h>
+#include <ardour/audioengine.h>
+
+using namespace ARDOUR;
+
+bool
+PortExportChannel::operator< (ExportChannel const & other) const
+{
+	PortExportChannel const * pec;
+	if (!(pec = dynamic_cast<PortExportChannel const *> (&other))) {
+		return this < &other;
+	}
+	return ports < pec->ports;
+}
+
+void
+PortExportChannel::read (Sample * data, nframes_t frames) const
+{
+	memset (data, 0, frames * sizeof (float));
+
+	for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
+		if (*it != 0) {
+			Sample* port_buffer = (*it)->get_audio_buffer(frames, 0).data();
+			
+			for (uint32_t i = 0; i < frames; ++i) {
+				data[i] += (float) port_buffer[i];
+			}
+		}
+	}
+}
+
+void
+PortExportChannel::get_state (XMLNode * node) const
+{
+	XMLNode * port_node;
+	for (PortSet::const_iterator it = ports.begin(); it != ports.end(); ++it) {
+		if ((port_node = node->add_child ("Port"))) {
+			port_node->add_property ("name", (*it)->name());
+		}
+	}
+}
+
+void
+PortExportChannel::set_state (XMLNode * node, Session & session)
+{
+	XMLProperty * prop;
+	XMLNodeList xml_ports = node->children ("Port");
+	for (XMLNodeList::iterator it = xml_ports.begin(); it != xml_ports.end(); ++it) {
+		if ((prop = (*it)->property ("name"))) {
+			ports.insert (dynamic_cast<AudioPort *> (session.engine().get_port_by_name (prop->value())));
+		}
+	}
+}
+
+RegionExportChannelFactory::RegionExportChannelFactory (Session * session, AudioRegion const & region, AudioTrack & track, Type type) :
+  region (region),
+  track (track),
+  type (type),
+  frames_per_cycle (session->engine().frames_per_cycle ()),
+  buffers_up_to_date (false),
+  region_start (region.position()),
+  position (region_start)
+{
+	switch (type) {
+	  case Raw:
+		n_channels = region.n_channels();
+		break;
+	  case Processed:
+		n_channels = track.n_outputs().n_audio();
+		break;
+	  default:
+		throw ExportFailed ("Unhandled type in ExportChannelFactory constructor");
+	}
+	
+	session->ProcessExport.connect (sigc::hide (sigc::mem_fun (*this, &RegionExportChannelFactory::new_cycle_started)));
+	
+	buffers.set_count (ChanCount (DataType::AUDIO, n_channels));
+	buffers.ensure_buffers (DataType::AUDIO, n_channels, frames_per_cycle);
+}
+
+ExportChannelPtr
+RegionExportChannelFactory::create (uint32_t channel)
+{
+	assert (channel < n_channels);
+	return ExportChannelPtr (new RegionExportChannel (*this, channel));
+}
+
+void
+RegionExportChannelFactory::read (uint32_t channel, Sample * data, nframes_t frames_to_read)
+{
+	assert (channel < n_channels);
+	assert (frames_to_read <= frames_per_cycle);
+	
+	if (!buffers_up_to_date) {
+		update_buffers(frames_to_read);
+		buffers_up_to_date = true;
+	}
+	
+	memcpy (data, buffers.get_audio (channel).data(), frames_to_read * sizeof (Sample));
+}
+
+void
+RegionExportChannelFactory::update_buffers (nframes_t frames)
+{
+	switch (type) {
+	  case Raw:
+		for (size_t channel = 0; channel < n_channels; ++channel) {
+			region.read (buffers.get_audio (channel).data(), position - region_start, frames, channel);
+		}
+		break;
+	  case Processed:
+	  	std::cout << "exporting " << frames << " frames from position " << position << std::endl;
+		track.export_stuff (buffers, position, frames);
+		break;
+	  default:
+		throw ExportFailed ("Unhandled type in ExportChannelFactory::update_buffers");
+	}
+	
+	position += frames;
+}
diff --git a/libs/ardour/export_channel_configuration.cc b/libs/ardour/export_channel_configuration.cc
index a092af88c1..a2a289737c 100644
--- a/libs/ardour/export_channel_configuration.cc
+++ b/libs/ardour/export_channel_configuration.cc
@@ -37,24 +37,6 @@
 namespace ARDOUR
 {
 
-/* ExportChannel */
-
-void
-ExportChannel::read_ports (float * data, nframes_t frames) const
-{
-	memset (data, 0, frames * sizeof (float));
-
-	for (iterator it = begin(); it != end(); ++it) {
-		if (*it != 0) {
-			Sample* port_buffer = (*it)->get_audio_buffer( frames, 0).data();
-			
-			for (uint32_t i = 0; i < frames; ++i) {
-				data[i] += (float) port_buffer[i];
-			}
-		}
-	}
-}
-
 /* ExportChannelConfiguration */
 
 ExportChannelConfiguration::ExportChannelConfiguration (Session & session) :
@@ -73,7 +55,6 @@ ExportChannelConfiguration::get_state ()
 {
 	XMLNode * root = new XMLNode ("ExportChannelConfiguration");
 	XMLNode * channel;
-	XMLNode * port_node;
 	
 	root->add_property ("split", get_split() ? "true" : "false");
 	root->add_property ("channels", to_string (get_n_chans(), std::dec));
@@ -84,12 +65,7 @@ ExportChannelConfiguration::get_state ()
 		if (!channel) { continue; }
 		
 		channel->add_property ("number", to_string (i, std::dec));
-		
-		for (ExportChannel::const_iterator p_it = (*c_it)->begin(); p_it != (*c_it)->end(); ++p_it) {
-			if ((port_node = channel->add_child ("Port"))) {
-				port_node->add_property ("name", (*p_it)->name());
-			}
-		}
+		(*c_it)->get_state (channel);
 		
 		++i;
 	}
@@ -108,15 +84,8 @@ ExportChannelConfiguration::set_state (const XMLNode & root)
 
 	XMLNodeList channels = root.children ("Channel");
 	for (XMLNodeList::iterator it = channels.begin(); it != channels.end(); ++it) {
-		boost::shared_ptr<ExportChannel> channel (new ExportChannel ());
-	
-		XMLNodeList ports = (*it)->children ("Port");
-		for (XMLNodeList::iterator p_it = ports.begin(); p_it != ports.end(); ++p_it) {
-			if ((prop = (*p_it)->property ("name"))) {
-				channel->add_port (dynamic_cast<AudioPort *> (session.engine().get_port_by_name (prop->value())));
-			}
-		}
-	
+		ExportChannelPtr channel (new PortExportChannel ());
+		channel->set_state (*it, session);
 		register_channel (channel);
 	}
 
@@ -124,9 +93,9 @@ ExportChannelConfiguration::set_state (const XMLNode & root)
 }
 
 bool
-ExportChannelConfiguration::all_channels_have_ports ()
+ExportChannelConfiguration::all_channels_have_ports () const
 {
-	for (ChannelList::iterator it = channels.begin(); it != channels.end(); ++it) {
+	for (ChannelList::const_iterator it = channels.begin(); it != channels.end(); ++it) {
 		if ((*it)->empty ()) { return false; }
 	}
 	
@@ -182,7 +151,7 @@ ExportChannelConfiguration::write_file ()
 			
 			/* Get channel data */
 			
-			frames_read = timespan->get_data (channel_buffer, frames, **it);
+			frames_read = timespan->get_data (channel_buffer, frames, *it);
 			
 			/* Interleave into file buffer */
 			
@@ -238,7 +207,7 @@ ExportChannelConfiguration::register_with_timespan (TimespanPtr new_timespan)
 	timespan = new_timespan;
 	
 	for (ChannelList::iterator it = channels.begin(); it != channels.end(); ++it) {
-		timespan->register_channel (**it);
+		timespan->register_channel (*it);
 	}
 }
 
diff --git a/libs/ardour/export_profile_manager.cc b/libs/ardour/export_profile_manager.cc
index dee9a9a991..86b586d8e0 100644
--- a/libs/ardour/export_profile_manager.cc
+++ b/libs/ardour/export_profile_manager.cc
@@ -53,6 +53,7 @@ ExportProfileManager::ExportProfileManager (Session & s) :
 
   session_range (new Location ()),
   ranges (new LocationList ()),
+  single_range_mode (false),
 
   format_list (new FormatList ())
 {
@@ -299,6 +300,20 @@ ExportProfileManager::set_selection_range (nframes_t start, nframes_t end)
 	}
 }
 
+std::string
+ExportProfileManager::set_single_range (nframes_t start, nframes_t end, Glib::ustring name)
+{
+	single_range_mode = true;
+	
+	single_range.reset (new Location());
+	single_range->set_name (name);
+	single_range->set (start, end);
+	
+	update_ranges ();
+	
+	return single_range->id().to_s();
+}
+
 bool
 ExportProfileManager::init_timespans (XMLNodeList nodes)
 {
@@ -377,6 +392,11 @@ ExportProfileManager::serialize_timespan (TimespanStatePtr state)
 void
 ExportProfileManager::update_ranges () {
 	ranges->clear();
+	
+	if (single_range_mode) {
+		ranges->push_back (single_range.get());
+		return;
+	}
 
 	/* Session */
 
diff --git a/libs/ardour/export_timespan.cc b/libs/ardour/export_timespan.cc
index d6996a5a48..4eb5b5a475 100644
--- a/libs/ardour/export_timespan.cc
+++ b/libs/ardour/export_timespan.cc
@@ -42,7 +42,7 @@ ExportTimespan::~ExportTimespan ()
 }
 
 void
-ExportTimespan::register_channel (ExportChannel const & channel)
+ExportTimespan::register_channel (ExportChannelPtr channel)
 {
 	TempFilePtr ptr (new ExportTempFile (1, frame_rate));
 	ChannelFilePair pair (channel, ptr);
@@ -58,7 +58,7 @@ ExportTimespan::rewind ()
 }
 
 nframes_t
-ExportTimespan::get_data (float * data, nframes_t frames, ExportChannel const & channel)
+ExportTimespan::get_data (float * data, nframes_t frames, ExportChannelPtr channel)
 {
 	TempFileMap::iterator it = filemap.find (channel);
 	if (it == filemap.end()) {
@@ -100,7 +100,7 @@ ExportTimespan::process (nframes_t frames)
 	float * data = new float[frames_to_read];
 	
 	for (TempFileMap::iterator it = filemap.begin(); it != filemap.end(); ++it) {
-		it->first.read_ports (data, frames_to_read);
+		it->first->read (data, frames_to_read);
 		it->second->write (data, frames_to_read);
 	}