Make stem export export from right before any processors.

The dialog does not support exporting from the outputs anymore, sorry. Will add options later...


git-svn-id: svn://localhost/ardour2/branches/3.0@8520 d708f5d6-7413-0410-9779-e7cbd77b26cf

10 files changed, 285 insertions, 9 deletions

diff --git a/libs/ardour/ardour/buffer_set.h b/libs/ardour/ardour/buffer_set.h
index fc5ef96449..f5ac1aee61 100644
--- a/libs/ardour/ardour/buffer_set.h
+++ b/libs/ardour/ardour/buffer_set.h
@@ -97,10 +97,16 @@ public:
 	AudioBuffer& get_audio(size_t i) {
 		return (AudioBuffer&)get(DataType::AUDIO, i);
 	}
+	const AudioBuffer& get_audio(size_t i) const {
+		return (const AudioBuffer&)get(DataType::AUDIO, i);
+	}
 
 	MidiBuffer& get_midi(size_t i) {
 		return (MidiBuffer&)get(DataType::MIDI, i);
 	}
+	const MidiBuffer& get_midi(size_t i) const {
+		return (const MidiBuffer&)get(DataType::MIDI, i);
+	}
 
 #ifdef HAVE_SLV2
 	/** Get a MIDI buffer translated into an LV2 MIDI buffer for use with plugins.
diff --git a/libs/ardour/ardour/capturing_processor.h b/libs/ardour/ardour/capturing_processor.h
new file mode 100644
index 0000000000..2e2db78091
--- /dev/null
+++ b/libs/ardour/ardour/capturing_processor.h
@@ -0,0 +1,53 @@
+/*
+    Copyright (C) 2011 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_capturing_processor_h__
+#define __ardour_capturing_processor_h__
+
+#include "ardour/processor.h"
+
+namespace ARDOUR {
+
+class CapturingProcessor : public Processor
+{
+  public:
+	CapturingProcessor (Session & session);
+	~CapturingProcessor();
+
+  public: // main interface
+	BufferSet const & get_capture_buffers() const { return capture_buffers; }
+
+  public: // Processor overrides
+	bool display_to_user() const { return false; }
+	int set_block_size (pframes_t nframes);
+	void run (BufferSet& bufs, framepos_t start_frame, framepos_t end_frame, pframes_t nframes, bool result_required);
+	bool configure_io (ChanCount in, ChanCount out);
+	bool can_support_io_configuration (const ChanCount& in, ChanCount& out) const;
+
+  private:
+
+	void realloc_buffers();
+
+	framecnt_t block_size;
+	BufferSet capture_buffers;
+};
+
+} // namespace ARDOUR
+
+#endif // __ardour_capturing_processor_h__
diff --git a/libs/ardour/ardour/export_channel.h b/libs/ardour/ardour/export_channel.h
index 34d6263976..5e42956cdb 100644
--- a/libs/ardour/ardour/export_channel.h
+++ b/libs/ardour/ardour/export_channel.h
@@ -38,6 +38,7 @@ class Session;
 class AudioTrack;
 class AudioPort;
 class AudioRegion;
+class CapturingProcessor;
 
 /// Export channel base class interface for different source types
 class ExportChannel : public boost::less_than_comparable<ExportChannel>
@@ -48,7 +49,7 @@ class ExportChannel : public boost::less_than_comparable<ExportChannel>
 
 	virtual void set_max_buffer_size(framecnt_t frames) { }
 
-	virtual void read (Sample *& data, framecnt_t frames) const = 0;
+	virtual void read (Sample const *& data, framecnt_t frames) const = 0;
 	virtual bool empty () const = 0;
 
 	/// Adds state to node passed
@@ -81,7 +82,7 @@ class PortExportChannel : public ExportChannel
 	PortExportChannel ();
 	void set_max_buffer_size(framecnt_t frames);
 
-	void read (Sample *& data, framecnt_t frames) const;
+	void read (Sample const *& data, framecnt_t frames) const;
 	bool empty () const { return ports.empty(); }
 
 	void get_state (XMLNode * node) const;
@@ -112,7 +113,7 @@ class RegionExportChannelFactory
 	~RegionExportChannelFactory ();
 
 	ExportChannelPtr create (uint32_t channel);
-	void read (uint32_t channel, Sample *& data, framecnt_t frames_to_read);
+	void read (uint32_t channel, Sample const *& data, framecnt_t frames_to_read);
 
   private:
 
@@ -142,7 +143,7 @@ class RegionExportChannel : public ExportChannel
 	friend class RegionExportChannelFactory;
 
   public:
-	void read (Sample *& data, framecnt_t frames_to_read) const { factory.read (channel, data, frames_to_read); }
+	void read (Sample const *& data, framecnt_t frames_to_read) const { factory.read (channel, data, frames_to_read); }
 	void get_state (XMLNode * /*node*/) const {};
 	void set_state (XMLNode * /*node*/, Session & /*session*/) {};
 	bool empty () const { return false; }
@@ -160,6 +161,49 @@ class RegionExportChannel : public ExportChannel
 	uint32_t channel;
 };
 
+/// Export channel for exporting from different positions in a route
+class RouteExportChannel : public ExportChannel
+{
+	class ProcessorRemover; // fwd declaration
+
+  public:
+	RouteExportChannel(boost::shared_ptr<CapturingProcessor> processor, size_t channel,
+	                   boost::shared_ptr<ProcessorRemover> remover);
+	~RouteExportChannel();
+
+	static void create_from_route(std::list<ExportChannelPtr> & result, Route & route);
+
+  public: // ExportChannel interface
+	void set_max_buffer_size(framecnt_t frames);
+
+	void read (Sample const *& data, framecnt_t frames) const;
+	bool empty () const { return false; }
+
+	void get_state (XMLNode * node) const;
+	void set_state (XMLNode * node, Session & session);
+
+	bool operator< (ExportChannel const & other) const;
+
+  private:
+
+	// Removes the processor from the track when deleted
+	class ProcessorRemover {
+	  public:
+		ProcessorRemover (Route & route, boost::shared_ptr<CapturingProcessor> processor)
+			: route (route), processor (processor) {}
+		~ProcessorRemover();
+	  private:
+		Route & route;
+		boost::shared_ptr<CapturingProcessor> processor;
+	};
+
+	boost::shared_ptr<CapturingProcessor> processor;
+	size_t channel;
+	// Each channel keeps a ref to the remover. Last one alive
+	// will cause the processor to be removed on deletion.
+	boost::shared_ptr<ProcessorRemover> remover;
+};
+
 } // namespace ARDOUR
 
 #endif
diff --git a/libs/ardour/ardour/export_channel_configuration.h b/libs/ardour/ardour/export_channel_configuration.h
index b5b9b65bf7..5701be576b 100644
--- a/libs/ardour/ardour/export_channel_configuration.h
+++ b/libs/ardour/ardour/export_channel_configuration.h
@@ -23,6 +23,8 @@
 
 #include <list>
 #include <string>
+#include <algorithm>
+
 #include <boost/enable_shared_from_this.hpp>
 
 #include "ardour/export_channel.h"
@@ -70,6 +72,9 @@ class ExportChannelConfiguration : public boost::enable_shared_from_this<ExportC
 	uint32_t get_n_chans () const { return channels.size(); }
 
 	void register_channel (ExportChannelPtr channel) { channels.push_back (channel); }
+	void register_channels (ChannelList const & new_channels) {
+		std::copy (new_channels.begin(), new_channels.end(), std::back_inserter(channels));
+	}
 	void clear_channels () { channels.clear (); }
 	
 	/** Returns a list of channel configurations that match the files created.
diff --git a/libs/ardour/ardour/route.h b/libs/ardour/ardour/route.h
index 60970d5d20..90f5664eba 100644
--- a/libs/ardour/ardour/route.h
+++ b/libs/ardour/ardour/route.h
@@ -59,6 +59,7 @@ class RouteGroup;
 class Send;
 class InternalReturn;
 class MonitorProcessor;
+class CapturingProcessor;
 
 class Route : public SessionObject, public Automatable, public RouteGroupMember, public GraphNode
 {
@@ -217,6 +218,7 @@ class Route : public SessionObject, public Automatable, public RouteGroupMember,
 	BufferSet* get_return_buffer () const;
 	void release_return_buffer () const;
 	void put_monitor_send_at (Placement);
+	boost::shared_ptr<CapturingProcessor> add_export_point(/* Add some argument for placement later */);
 
 	/** A record of the stream configuration at some point in the processor list.
 	 * Used to return where and why an processor list configuration request failed.
diff --git a/libs/ardour/capturing_processor.cc b/libs/ardour/capturing_processor.cc
new file mode 100644
index 0000000000..2fa83ace81
--- /dev/null
+++ b/libs/ardour/capturing_processor.cc
@@ -0,0 +1,75 @@
+/*
+    Copyright (C) 2011 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/capturing_processor.h"
+#include "ardour/session.h"
+#include "ardour/audioengine.h"
+
+namespace ARDOUR {
+
+CapturingProcessor::CapturingProcessor (Session & session)
+  : Processor (session, X_("capture point"))
+  , block_size (session.engine().frames_per_cycle())
+{
+	realloc_buffers ();
+}
+
+CapturingProcessor::~CapturingProcessor()
+{
+}
+
+int
+CapturingProcessor::set_block_size (pframes_t nframes)
+{
+	block_size = nframes;
+	realloc_buffers();
+	return 0;
+}
+
+void
+CapturingProcessor::run (BufferSet& bufs, framepos_t, framepos_t, pframes_t nframes, bool)
+{
+	if (active()) {
+		capture_buffers.read_from (bufs, nframes);
+	}
+}
+
+bool
+CapturingProcessor::configure_io (ChanCount in, ChanCount out)
+{
+	Processor::configure_io (in, out);
+	realloc_buffers();
+	return true;
+}
+
+bool
+CapturingProcessor::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
+{
+	out = in;
+	return true;
+}
+
+void
+CapturingProcessor::realloc_buffers()
+{
+	capture_buffers.ensure_buffers (_configured_input, block_size);
+}
+
+} // namespace ARDOUR
diff --git a/libs/ardour/export_channel.cc b/libs/ardour/export_channel.cc
index 4cf510a971..f36716761b 100644
--- a/libs/ardour/export_channel.cc
+++ b/libs/ardour/export_channel.cc
@@ -23,6 +23,7 @@
 #include "ardour/audio_track.h"
 #include "ardour/audioengine.h"
 #include "ardour/audioregion.h"
+#include "ardour/capturing_processor.h"
 #include "ardour/export_channel.h"
 #include "ardour/export_failed.h"
 #include "ardour/session.h"
@@ -53,7 +54,7 @@ PortExportChannel::operator< (ExportChannel const & other) const
 }
 
 void
-PortExportChannel::read (Sample *& data, framecnt_t frames) const
+PortExportChannel::read (Sample const *& data, framecnt_t frames) const
 {
 	assert(buffer);
 	assert(frames <= buffer_size);
@@ -153,7 +154,7 @@ RegionExportChannelFactory::create (uint32_t channel)
 }
 
 void
-RegionExportChannelFactory::read (uint32_t channel, Sample *& data, framecnt_t frames_to_read)
+RegionExportChannelFactory::read (uint32_t channel, Sample const *& data, framecnt_t frames_to_read)
 {
 	assert (channel < n_channels);
 	assert (frames_to_read <= frames_per_cycle);
@@ -194,3 +195,76 @@ RegionExportChannelFactory::update_buffers (framecnt_t frames)
 	position += frames;
 }
 
+
+RouteExportChannel::RouteExportChannel(boost::shared_ptr<CapturingProcessor> processor, size_t channel,
+                                       boost::shared_ptr<ProcessorRemover> remover)
+  : processor (processor)
+  , channel (channel)
+  , remover (remover)
+{
+}
+
+RouteExportChannel::~RouteExportChannel()
+{
+}
+
+void
+RouteExportChannel::create_from_route(std::list<ExportChannelPtr> & result, Route & route)
+{
+	boost::shared_ptr<CapturingProcessor> processor = route.add_export_point();
+	uint32_t channels = processor->input_streams().n_audio();
+
+	boost::shared_ptr<ProcessorRemover> remover (new ProcessorRemover (route, processor));
+	result.clear();
+	for (uint32_t i = 0; i < channels; ++i) {
+		result.push_back (ExportChannelPtr (new RouteExportChannel (processor, i, remover)));
+	}
+}
+
+void
+RouteExportChannel::set_max_buffer_size(framecnt_t frames)
+{
+	if (processor) {
+		processor->set_block_size (frames);
+	}
+}
+
+void
+RouteExportChannel::read (Sample const *& data, framecnt_t frames) const
+{
+	assert(processor);
+	AudioBuffer const & buffer = processor->get_capture_buffers().get_audio (channel);
+	assert (frames <= (framecnt_t) buffer.size());
+	data = buffer.data();
+}
+
+void
+RouteExportChannel::get_state (XMLNode * node) const
+{
+	// TODO
+}
+
+void
+RouteExportChannel::set_state (XMLNode * node, Session & session)
+{
+	// TODO
+}
+
+bool
+RouteExportChannel::operator< (ExportChannel const & other) const
+{
+	RouteExportChannel const * rec;
+	if ((rec = dynamic_cast<RouteExportChannel const *>(&other)) == 0) {
+		return this < &other;
+	}
+
+	if (processor.get() == rec->processor.get()) {
+		return channel < rec->channel;
+	}
+	return processor.get() < rec->processor.get();
+}
+
+RouteExportChannel::ProcessorRemover::~ProcessorRemover()
+{
+	route.remove_processor (processor);
+}
diff --git a/libs/ardour/export_graph_builder.cc b/libs/ardour/export_graph_builder.cc
index d0ce883385..1180d5eace 100644
--- a/libs/ardour/export_graph_builder.cc
+++ b/libs/ardour/export_graph_builder.cc
@@ -42,10 +42,10 @@ ExportGraphBuilder::process (framecnt_t frames, bool last_cycle)
 	assert(frames <= process_buffer_frames);
 	
 	for (ChannelMap::iterator it = channels.begin(); it != channels.end(); ++it) {
-		Sample * process_buffer = 0;
+		Sample const * process_buffer = 0;
 		it->first->read (process_buffer, frames);
-		ProcessContext<Sample> context(process_buffer, frames, 1);
-		if (last_cycle) { context.set_flag (ProcessContext<Sample>::EndOfInput); }
+		ConstProcessContext<Sample> context(process_buffer, frames, 1);
+		if (last_cycle) { context().set_flag (ProcessContext<Sample>::EndOfInput); }
 		it->second->process (context);
 	}
 	
diff --git a/libs/ardour/route.cc b/libs/ardour/route.cc
index 5fe287c2bf..c1004a18f9 100644
--- a/libs/ardour/route.cc
+++ b/libs/ardour/route.cc
@@ -60,6 +60,7 @@
 #include "ardour/utils.h"
 #include "ardour/graph.h"
 #include "ardour/unknown_processor.h"
+#include "ardour/capturing_processor.h"
 
 #include "i18n.h"
 
@@ -3057,6 +3058,21 @@ Route::put_monitor_send_at (Placement p)
 	_session.set_dirty ();
 }
 
+boost::shared_ptr<CapturingProcessor>
+Route::add_export_point()
+{
+	// Check if it exists already
+	boost::shared_ptr<CapturingProcessor> processor;
+	if ((processor = boost::dynamic_pointer_cast<CapturingProcessor> (*_processors.begin()))) {
+		return processor;
+	}
+
+	// ...else add it
+	processor.reset (new CapturingProcessor (_session));
+	add_processor (processor, _processors.begin());
+	return processor;
+}
+
 framecnt_t
 Route::update_total_latency ()
 {
diff --git a/libs/ardour/wscript b/libs/ardour/wscript
index 03e602ee5a..ac1c80c0cf 100644
--- a/libs/ardour/wscript
+++ b/libs/ardour/wscript
@@ -62,6 +62,7 @@ libardour_sources = [
 	'bundle.cc',
 	'butler.cc',
         'callback.cc',
+        'capturing_processor.cc',
 	'chan_count.cc',
 	'chan_mapping.cc',
 	'configuration.cc',