X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fmidi_track.cc;h=ff9810629fc1b591ccfb6787cf9f659f6d9f2afa;hb=b5478a8a2b09793fe94c2a8836daec2b8f24f0a5;hp=ce466343eae21f25af471705585113cec7db96b1;hpb=07be98b3410ac70b3c4451592fb88def678611ef;p=ardour.git

diff --git a/libs/ardour/midi_track.cc b/libs/ardour/midi_track.cc
index ce466343ea..ff9810629f 100644
--- a/libs/ardour/midi_track.cc
+++ b/libs/ardour/midi_track.cc
@@ -1,6 +1,6 @@
 /*
     Copyright (C) 2006 Paul Davis
-	By Dave Robillard, 2006
+    Author: David Robillard
 
     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
@@ -16,17 +16,17 @@
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
+
 #include "pbd/error.h"
-#include <sigc++/retype.h>
-#include <sigc++/retype_return.h>
-#include <sigc++/bind.h>
 
 #include "pbd/enumwriter.h"
+#include "pbd/convert.h"
 #include "midi++/events.h"
 #include "evoral/midi_util.h"
 
 #include "ardour/amp.h"
 #include "ardour/buffer_set.h"
+#include "ardour/debug.h"
 #include "ardour/delivery.h"
 #include "ardour/io_processor.h"
 #include "ardour/meter.h"
@@ -41,6 +41,7 @@
 #include "ardour/processor.h"
 #include "ardour/route_group_specialized.h"
 #include "ardour/session.h"
+#include "ardour/session_playlists.h"
 #include "ardour/utils.h"
 
 #include "i18n.h"
@@ -55,31 +56,25 @@ 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)
+	, _input_active (true)
 {
-	use_new_diskstream ();
-
-	_declickable = true;
-	_freeze_record.state = NoFreeze;
-	_saved_meter_point = _meter_point;
-	_mode = mode;
 }
 
-MidiTrack::MidiTrack (Session& sess, const XMLNode& node)
-	: Track (sess, node, DataType::MIDI )
-	, _immediate_events(1024) // FIXME: size?
-	, _step_edit_ring_buffer(64) // FIXME: size?
-	, _note_mode(Sustained)
-	, _step_editing (false)
-	, _default_channel (0)
-	, _midi_thru (true)
+MidiTrack::~MidiTrack ()
 {
-	_set_state(node, false);
 }
 
-MidiTrack::~MidiTrack ()
+int
+MidiTrack::init ()
 {
+	if (Track::init ()) {
+		return -1;
+	}
+
+	_input->changed.connect_same_thread (*this, boost::bind (&MidiTrack::track_input_active, this, _1, _2));
+
+	return 0;
 }
 
 void
@@ -96,56 +91,40 @@ MidiTrack::use_new_diskstream ()
 	assert(_mode != Destructive);
 
 	boost::shared_ptr<MidiDiskstream> ds (new MidiDiskstream (_session, name(), dflags));
-	_session.add_diskstream (ds);
+	ds->do_refill_with_alloc ();
+	ds->set_block_size (_session.get_block_size ());
 
-	set_diskstream (boost::dynamic_pointer_cast<MidiDiskstream> (ds));
+	set_diskstream (ds);
 }
 
-int
-MidiTrack::set_diskstream (boost::shared_ptr<MidiDiskstream> ds)
+void
+MidiTrack::set_record_enabled (bool yn, void *src)
 {
-	_diskstream = ds;
-	_diskstream->set_route (*this);
-	_diskstream->set_destructive (_mode == Destructive);
-
-	_diskstream->set_record_enabled (false);
-	//_diskstream->monitor_input (false);
-
-	ic_connection.disconnect();
-	ic_connection = _input->changed.connect (mem_fun (*_diskstream, &MidiDiskstream::handle_input_change));
-
-	DiskstreamChanged (); /* EMIT SIGNAL */
+	if (_step_editing) {
+		return;
+	}
 
-	return 0;
+	Track::set_record_enabled (yn, src);
 }
 
-int
-MidiTrack::use_diskstream (string name)
+void
+MidiTrack::set_diskstream (boost::shared_ptr<Diskstream> ds)
 {
-	boost::shared_ptr<MidiDiskstream> dstream;
+	Track::set_diskstream (ds);
 
-	cerr << "\n\n\nMIDI use diskstream\n";
-
-	if ((dstream = boost::dynamic_pointer_cast<MidiDiskstream>(_session.diskstream_by_name (name))) == 0) {
-		error << string_compose(_("MidiTrack: midi diskstream \"%1\" not known by session"), name) << endmsg;
-		return -1;
-	}
-
-	cerr << "\n\n\nMIDI found DS\n";
-	return set_diskstream (dstream);
-}
+	_diskstream->set_track (this);
+	_diskstream->set_destructive (_mode == Destructive);
 
-int
-MidiTrack::use_diskstream (const PBD::ID& id)
-{
-	boost::shared_ptr<MidiDiskstream> dstream;
+	_diskstream->set_record_enabled (false);
+	//_diskstream->monitor_input (false);
 
-	if ((dstream = boost::dynamic_pointer_cast<MidiDiskstream> (_session.diskstream_by_id (id))) == 0) {
-		error << string_compose(_("MidiTrack: midi diskstream \"%1\" not known by session"), id) << endmsg;
-		return -1;
-	}
+	_diskstream_data_recorded_connection.disconnect ();
+	boost::shared_ptr<MidiDiskstream> mds = boost::dynamic_pointer_cast<MidiDiskstream> (ds);
+	mds->DataRecorded.connect_same_thread (
+		_diskstream_data_recorded_connection,
+		boost::bind (&MidiTrack::diskstream_data_recorded, this, _1));
 
-	return set_diskstream (dstream);
+	DiskstreamChanged (); /* EMIT SIGNAL */
 }
 
 boost::shared_ptr<MidiDiskstream>
@@ -155,18 +134,11 @@ MidiTrack::midi_diskstream() const
 }
 
 int
-MidiTrack::set_state (const XMLNode& node)
-{
-	return _set_state (node, true);
-}
-
-int
-MidiTrack::_set_state (const XMLNode& node, bool call_base)
+MidiTrack::set_state (const XMLNode& node, int version)
 {
 	const XMLProperty *prop;
-	XMLNodeConstIterator iter;
 
-	if (Route::_set_state (node, call_base)) {
+	if (Track::set_state (node, version)) {
 		return -1;
 	}
 
@@ -180,67 +152,18 @@ MidiTrack::_set_state (const XMLNode& node, bool call_base)
 	}
 
 	if ((prop = node.property ("midi-thru")) != 0) {
-		set_midi_thru (prop->value() == "yes");
+		set_midi_thru (string_is_affirmative (prop->value()));
 	}
 
-	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 */
-
-		if ((prop = node.property ("diskstream")) == 0) {
-			fatal << _("programming error: MidiTrack given state without diskstream!") << endmsg;
-			/*NOTREACHED*/
-			return -1;
-		}
-
-		if (use_diskstream (prop->value())) {
-			return -1;
-		}
-
-	} else {
-
-		PBD::ID id (prop->value());
-		PBD::ID zero ("0");
-
-		/* this wierd hack is used when creating tracks from a template. there isn't
-		   a particularly good time to interpose between setting the first part of
-		   the track state (notably Route::set_state() and the track mode), and the
-		   second part (diskstream stuff). So, we have a special ID for the diskstream
-		   that means "you should create a new diskstream here, not look for
-		   an old one.
-		*/
-
-		cerr << "\n\n\n\n MIDI track " << name() << " found DS id " << id << endl;
-
-		if (id == zero) {
-			use_new_diskstream ();
-		} else if (use_diskstream (id)) {
-			return -1;
-		}
-	}
-
-	XMLNodeList nlist;
-	XMLNodeConstIterator niter;
-	XMLNode *child;
-
-	nlist = node.children();
-	for (niter = nlist.begin(); niter != nlist.end(); ++niter){
-		child = *niter;
-
-		if (child->name() == X_("recenable")) {
-			_rec_enable_control->set_state (*child);
-			_session.add_controllable (_rec_enable_control);
-		}
+	if ((prop = node.property ("input-active")) != 0) {
+		set_input_active (string_is_affirmative (prop->value()));
 	}
 
 	pending_state = const_cast<XMLNode*> (&node);
 
 	if (_session.state_of_the_state() & Session::Loading) {
-		_session.StateReady.connect (mem_fun (*this, &MidiTrack::set_state_part_two));
+		_session.StateReady.connect_same_thread (
+			*this, boost::bind (&MidiTrack::set_state_part_two, this));
 	} else {
 		set_state_part_two ();
 	}
@@ -251,7 +174,7 @@ MidiTrack::_set_state (const XMLNode& node, bool call_base)
 XMLNode&
 MidiTrack::state(bool full_state)
 {
-	XMLNode& root (Route::state(full_state));
+	XMLNode& root (Track::state(full_state));
 	XMLNode* freeze_node;
 	char buf[64];
 
@@ -274,31 +197,12 @@ MidiTrack::state(bool full_state)
 		root.add_child_nocopy (*freeze_node);
 	}
 
-	/* Alignment: act as a proxy for the diskstream */
-
-	XMLNode* align_node = new XMLNode (X_("Alignment"));
-	AlignStyle as = _diskstream->alignment_style ();
-	align_node->add_property (X_("style"), enum_2_string (as));
-	root.add_child_nocopy (*align_node);
-
 	root.add_property (X_("note-mode"), enum_2_string (_note_mode));
 
-	/* we don't return diskstream state because we don't
-	   own the diskstream exclusively. control of the diskstream
-	   state is ceded to the Session, even if we create the
-	   diskstream.
-	*/
-
-	_diskstream->id().print (buf, sizeof(buf));
-	root.add_property ("diskstream-id", buf);
-
-	root.add_child_nocopy (_rec_enable_control->get_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);
+	root.add_property ("input-active", (_input_active ? "yes" : "no"));
 
 	return root;
 }
@@ -328,7 +232,7 @@ MidiTrack::set_state_part_two ()
 		_freeze_record.processor_info.clear ();
 
 		if ((prop = fnode->property (X_("playlist"))) != 0) {
-			boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
+			boost::shared_ptr<Playlist> pl = _session.playlists->by_name (prop->value());
 			if (pl) {
 				_freeze_record.playlist = boost::dynamic_pointer_cast<MidiPlaylist> (pl);
 			} else {
@@ -361,46 +265,24 @@ MidiTrack::set_state_part_two ()
 		}
 	}
 
-	/* Alignment: act as a proxy for the diskstream */
-
-	if ((fnode = find_named_node (*pending_state, X_("Alignment"))) != 0) {
-
-		if ((prop = fnode->property (X_("style"))) != 0) {
-
-			/* fix for older sessions from before EnumWriter */
-
-			string pstr;
-
-			if (prop->value() == "capture") {
-				pstr = "CaptureTime";
-			} else if (prop->value() == "existing") {
-				pstr = "ExistingMaterial";
-			} else {
-				pstr = prop->value();
-			}
-
-			AlignStyle as = AlignStyle (string_2_enum (pstr, as));
-			_diskstream->set_persistent_align_style (as);
-		}
+	if (midi_diskstream ()) {
+		midi_diskstream()->set_block_size (_session.get_block_size ());
 	}
+
 	return;
 }
 
 int
-MidiTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame, int declick,
-		 bool can_record, bool rec_monitors_input)
+MidiTrack::roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, int declick, bool& need_butler)
 {
-	int dret;
+	Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
+	if (!lm.locked()) {
+		return 0;
+	}
+
 	boost::shared_ptr<MidiDiskstream> diskstream = midi_diskstream();
 
-	{
-		Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
-		if (lm.locked()) {
-			// automation snapshot can also be called from the non-rt context
-			// and it uses the redirect list, so we take the lock out here
-			automation_snapshot (start_frame);
-		}
-	}
+	automation_snapshot (start_frame);
 
 	if (n_outputs().n_total() == 0 && _processors.empty()) {
 		return 0;
@@ -411,20 +293,25 @@ MidiTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame,
 		return 0;
 	}
 
-	nframes_t transport_frame = _session.transport_frame();
+	framepos_t transport_frame = _session.transport_frame();
 
+	int dret;
+	framecnt_t playback_distance;
 
 	if ((nframes = check_initial_delay (nframes, transport_frame)) == 0) {
 		/* need to do this so that the diskstream sets its
 		   playback distance to zero, thus causing diskstream::commit
 		   to do nothing.
 		   */
-		return diskstream->process (transport_frame, 0, can_record, rec_monitors_input);
+		dret = diskstream->process (transport_frame, 0, playback_distance);
+		need_butler = diskstream->commit (playback_distance);
+		return dret;
 	}
 
 	_silent = false;
 
-	if ((dret = diskstream->process (transport_frame, nframes, can_record, rec_monitors_input)) != 0) {
+	if ((dret = diskstream->process (transport_frame, nframes, playback_distance)) != 0) {
+		need_butler = diskstream->commit (playback_distance);
 		silence (nframes);
 		return dret;
 	}
@@ -435,7 +322,7 @@ MidiTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame,
 		_input->process_input (_meter, start_frame, end_frame, nframes);
 	}
 
-	if (diskstream->record_enabled() && !can_record && !_session.config.get_auto_input()) {
+	if (monitoring_state() == MonitoringInput) {
 
 		/* not actually recording, but we want to hear the input material anyway,
 		   at least potentially (depending on monitoring options)
@@ -459,29 +346,44 @@ MidiTrack::roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame,
 		BufferSet& bufs = _session.get_scratch_buffers (n_process_buffers());
 		MidiBuffer& mbuf (bufs.get_midi (0));
 
-		diskstream->get_playback (mbuf, start_frame, end_frame);
+		/* we are a MIDI track, so we always start the chain with a single-channel diskstream */
+		ChanCount c;
+		c.set_audio (0);
+		c.set_midi (1);
+		bufs.set_count (c);
+
+		diskstream->get_playback (mbuf, nframes);
 
 		/* append immediate messages to the first MIDI buffer (thus sending it to the first output port) */
 
 		write_out_of_band_data (bufs, start_frame, end_frame, nframes);
 
-		process_output_buffers (bufs, start_frame, end_frame, nframes,
-					(!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick);
+		/* final argument: don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 
+		process_output_buffers (
+			bufs, start_frame, end_frame, nframes,
+			declick, (!diskstream->record_enabled() && !_session.transport_stopped())
+			);
 	}
 
-	_main_outs->flush (nframes, end_frame - start_frame - 1);
+	for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
+		boost::shared_ptr<Delivery> d = boost::dynamic_pointer_cast<Delivery> (*i);
+		if (d) {
+			d->flush_buffers (nframes, end_frame - start_frame - 1);
+		}
+	}
 
+	need_butler = diskstream->commit (playback_distance);
+	
 	return 0;
 }
 
 int
-MidiTrack::no_roll (nframes_t nframes, sframes_t start_frame, sframes_t end_frame,
-		    bool state_changing, bool can_record, bool rec_monitors_input)
+MidiTrack::no_roll (pframes_t nframes, framepos_t start_frame, framepos_t end_frame, bool state_changing)
 {
-	int ret = Track::no_roll (nframes, start_frame, end_frame, state_changing, can_record, rec_monitors_input);
+	int ret = Track::no_roll (nframes, start_frame, end_frame, state_changing);
 
-	if (ret == 0 && diskstream()->record_enabled() && _step_editing) {
+	if (ret == 0 && _step_editing) {
 		push_midi_input_to_step_edit_ringbuffer (nframes);
 	}
 
@@ -489,16 +391,33 @@ MidiTrack::no_roll (nframes_t nframes, sframes_t start_frame, sframes_t end_fram
 }
 
 void
-MidiTrack::handle_transport_stopped (bool abort, bool did_locate, bool flush_processors)
+MidiTrack::realtime_locate ()
 {
+	Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
+	if (!lm.locked ()) {
+		return;
+	}
 
-	_main_outs->transport_stopped ();
-	Route::handle_transport_stopped (abort, did_locate, flush_processors);
+	for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
+		(*i)->realtime_locate ();
+	}
 }
 
+void
+MidiTrack::realtime_handle_transport_stopped ()
+{
+	Glib::RWLock::ReaderLock lm (_processor_lock, Glib::TRY_LOCK);
+	if (!lm.locked ()) {
+		return;
+	}
+
+	for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
+		(*i)->realtime_handle_transport_stopped ();
+	}
+}
 
 void
-MidiTrack::push_midi_input_to_step_edit_ringbuffer (nframes_t nframes)
+MidiTrack::push_midi_input_to_step_edit_ringbuffer (framecnt_t nframes)
 {
 	PortSet& ports (_input->ports());
 
@@ -510,65 +429,75 @@ MidiTrack::push_midi_input_to_step_edit_ringbuffer (nframes_t nframes)
 
 		for (MidiBuffer::const_iterator e = mb->begin(); e != mb->end(); ++e) {
 
-			const Evoral::MIDIEvent<nframes_t> ev(*e, false);
+			const Evoral::MIDIEvent<framepos_t> ev(*e, false);
 
-			/* we don't care about the time for this purpose */
+			/* note on, since for step edit, note length is determined
+			   elsewhere
+			*/
 
-			_step_edit_ring_buffer.write (0, ev.type(), ev.size(), ev.buffer());
+			if (ev.is_note_on()) {
+				/* we don't care about the time for this purpose */
+				_step_edit_ring_buffer.write (0, ev.type(), ev.size(), ev.buffer());
+			}
 		}
 	}
 }
 
 void
-MidiTrack::write_out_of_band_data (BufferSet& bufs, sframes_t /*start*/, sframes_t /*end*/, nframes_t nframes)
+MidiTrack::write_out_of_band_data (BufferSet& bufs, framepos_t /*start*/, framepos_t /*end*/, framecnt_t nframes)
 {
+	MidiBuffer& buf (bufs.get_midi (0));
+
 	// Append immediate events
 
-	MidiBuffer& buf (bufs.get_midi (0));
-	_immediate_events.read (buf, 0, 0, nframes - 1); // all stamps = 0
+	if (_immediate_events.read_space()) {
+
+		DEBUG_TRACE (DEBUG::MidiIO, string_compose ("%1 has %2 of immediate events to deliver\n",
+		                                            name(), _immediate_events.read_space()));
+
+		/* write as many of the immediate events as we can, but give "true" as
+		 * the last argument ("stop on overflow in destination") so that we'll
+		 * ship the rest out next time.
+		 *
+		 * the (nframes-1) argument puts all these events at the last
+		 * possible position of the output buffer, so that we do not
+		 * violate monotonicity when writing.
+		 */
 
-	/* MIDI thru: send incoming data "through" output */
-	if (_midi_thru && _input->n_ports().n_midi()) {
+		_immediate_events.read (buf, 0, 1, nframes-1, true);
+	}
+
+	// MIDI thru: send incoming data "through" output
+	if (_midi_thru && _session.transport_speed() != 0.0f && _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*/)
+MidiTrack::export_stuff (BufferSet& /*bufs*/, framecnt_t /*nframes*/, framepos_t /*end_frame*/)
 {
 	return -1;
 }
 
-void
-MidiTrack::set_latency_delay (nframes_t longest_session_latency)
-{
-	Route::set_latency_delay (longest_session_latency);
-	_diskstream->set_roll_delay (_roll_delay);
-}
-
 boost::shared_ptr<Region>
 MidiTrack::bounce (InterThreadInfo& /*itt*/)
 {
-	throw;
-	// vector<MidiSource*> srcs;
-	// return _session.write_one_track (*this, 0, _session.current_end_frame(), false, srcs, itt);
+	std::cerr << "MIDI bounce currently unsupported" << std::endl;
 	return boost::shared_ptr<Region> ();
 }
 
 
 boost::shared_ptr<Region>
-MidiTrack::bounce_range (nframes_t /*start*/, nframes_t /*end*/, InterThreadInfo& /*itt*/, bool /*enable_processing*/)
+MidiTrack::bounce_range (framepos_t /*start*/, framepos_t /*end*/, InterThreadInfo& /*itt*/, bool /*enable_processing*/)
 {
-	throw;
-	//vector<MidiSource*> srcs;
-	//return _session.write_one_track (*this, start, end, false, srcs, itt);
+	std::cerr << "MIDI bounce range currently unsupported" << std::endl;
 	return boost::shared_ptr<Region> ();
 }
 
 void
-MidiTrack::freeze (InterThreadInfo& /*itt*/)
+MidiTrack::freeze_me (InterThreadInfo& /*itt*/)
 {
+	std::cerr << "MIDI freeze currently unsupported" << std::endl;
 }
 
 void
@@ -588,6 +517,7 @@ MidiTrack::set_note_mode (NoteMode m)
 void
 MidiTrack::midi_panic()
 {
+	DEBUG_TRACE (DEBUG::MidiIO, string_compose ("%1 delivers panic data\n", name()));
 	for (uint8_t channel = 0; channel <= 0xF; channel++) {
 		uint8_t ev[3] = { MIDI_CMD_CONTROL | channel, MIDI_CTL_SUSTAIN, 0 };
 		write_immediate_event(3, ev);
@@ -612,7 +542,7 @@ MidiTrack::write_immediate_event(size_t size, const uint8_t* buf)
 }
 
 void
-MidiTrack::MidiControl::set_value(float val)
+MidiTrack::MidiControl::set_value(double val)
 {
 	bool valid = false;
 	if (isinf(val)) {
@@ -632,9 +562,8 @@ MidiTrack::MidiControl::set_value(float val)
 	}
 
 	assert(val <= _list->parameter().max());
-	size_t size = 3;
-
 	if ( ! automation_playback()) {
+		size_t size = 3;
 		uint8_t ev[3] = { _list->parameter().channel(), int(val), 0 };
 		switch(_list->parameter().type()) {
 		case MidiCCAutomation:
@@ -673,17 +602,119 @@ MidiTrack::MidiControl::set_value(float val)
 void
 MidiTrack::set_step_editing (bool yn)
 {
-	_step_editing = yn;
+	if (_session.record_status() != Session::Disabled) {
+		return;
+	}
+
+	if (yn != _step_editing) {
+		_step_editing = yn;
+		StepEditStatusChange (yn);
+	}
 }
 
 void
-MidiTrack::set_default_channel (uint8_t chn)
+MidiTrack::set_midi_thru (bool yn)
+{
+	_midi_thru = yn;
+}
+
+boost::shared_ptr<SMFSource>
+MidiTrack::write_source (uint32_t)
 {
-	_default_channel = std::min ((unsigned int) chn, 15U);
+	return midi_diskstream()->write_source ();
 }
 
 void
-MidiTrack::set_midi_thru (bool yn)
+MidiTrack::set_channel_mode (ChannelMode mode, uint16_t mask)
 {
-	_midi_thru = yn;
+	midi_diskstream()->set_channel_mode (mode, mask);
+}
+
+ChannelMode
+MidiTrack::get_channel_mode ()
+{
+	return midi_diskstream()->get_channel_mode ();
+}
+
+uint16_t
+MidiTrack::get_channel_mask ()
+{
+	return midi_diskstream()->get_channel_mask ();
+}
+
+boost::shared_ptr<MidiPlaylist>
+MidiTrack::midi_playlist ()
+{
+	return midi_diskstream()->midi_playlist ();
+}
+
+void
+MidiTrack::diskstream_data_recorded (boost::weak_ptr<MidiSource> src)
+{
+	DataRecorded (src); /* EMIT SIGNAL */
+}
+
+bool
+MidiTrack::should_monitor () const
+{
+	return true;
+}
+
+bool
+MidiTrack::send_silence () const
+{
+	return false;
+}
+
+bool
+MidiTrack::input_active () const
+{
+	return _input_active;
+}
+
+void
+MidiTrack::set_input_active (bool yn)
+{
+	if (yn != _input_active) {
+		_input_active = yn;
+		map_input_active (yn);
+		InputActiveChanged (); /* EMIT SIGNAL */
+	}
+}
+
+void
+MidiTrack::map_input_active (bool yn)
+{
+	if (!_input) {
+		return;
+	}
+
+	PortSet& ports (_input->ports());
+
+	for (PortSet::iterator p = ports.begin(DataType::MIDI); p != ports.end(DataType::MIDI); ++p) {
+		boost::shared_ptr<MidiPort> mp = boost::dynamic_pointer_cast<MidiPort> (*p);
+		if (yn != mp->input_active()) {
+			mp->set_input_active (yn);
+		}
+	}
+}
+
+void
+MidiTrack::track_input_active (IOChange change, void* /* src */)
+{
+	if (change.type & IOChange::ConfigurationChanged) {
+		map_input_active (_input_active);
+	}
+}
+
+boost::shared_ptr<Diskstream>
+MidiTrack::diskstream_factory (XMLNode const & node)
+{
+	return boost::shared_ptr<Diskstream> (new MidiDiskstream (_session, node));
+}
+
+boost::shared_ptr<MidiBuffer>
+MidiTrack::get_gui_feed_buffer () const
+{
+	return midi_diskstream()->get_gui_feed_buffer ();
 }