Remove unnecessary 0 checks before delete; see http://www.parashift.com/c++-faq-lite...
[ardour.git] / libs / ardour / audio_track.cc
index 2f33012546efc1f509922fe22984508f67e500f0..816f08cbd5ec99b8b55c282152738185e78b39e4 100644 (file)
     along with this program; if not, write to the Free Software
     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 
-    $Id$
 */
-#include <pbd/error.h>
+
 #include <sigc++/retype.h>
 #include <sigc++/retype_return.h>
 #include <sigc++/bind.h>
 
+#include <pbd/error.h>
+#include <pbd/enumwriter.h>
+
 #include <ardour/audio_track.h>
 #include <ardour/audio_diskstream.h>
 #include <ardour/session.h>
-#include <ardour/redirect.h>
+#include <ardour/io_processor.h>
 #include <ardour/audioregion.h>
 #include <ardour/audiosource.h>
+#include <ardour/region_factory.h>
 #include <ardour/route_group_specialized.h>
-#include <ardour/insert.h>
+#include <ardour/processor.h>
+#include <ardour/plugin_insert.h>
 #include <ardour/audioplaylist.h>
+#include <ardour/playlist_factory.h>
 #include <ardour/panner.h>
 #include <ardour/utils.h>
-
+#include <ardour/buffer_set.h>
 #include "i18n.h"
 
 using namespace std;
@@ -55,41 +60,74 @@ AudioTrack::AudioTrack (Session& sess, string name, Route::Flag flag, TrackMode
                dflags = AudioDiskstream::Flag (dflags | AudioDiskstream::Destructive);
        }
 
-       AudioDiskstream* ds = new AudioDiskstream (_session, name, dflags);
+       boost::shared_ptr<AudioDiskstream> ds (new AudioDiskstream (_session, name, dflags));
        
-       set_diskstream (*ds, this);
+       _session.add_diskstream (ds);
+
+       set_diskstream (boost::dynamic_pointer_cast<AudioDiskstream> (ds), this);
 }
 
 AudioTrack::AudioTrack (Session& sess, const XMLNode& node)
        : Track (sess, node)
 {
-       set_state (node);
+       _set_state (node, false);
 }
 
 AudioTrack::~AudioTrack ()
 {
 }
 
+int
+AudioTrack::set_mode (TrackMode m)
+{
+       if (m != _mode) {
+
+               if (_diskstream->set_destructive (m == Destructive)) {
+                       return -1;
+               }
+
+               _mode = m;
+               
+               TrackModeChanged (); /* EMIT SIGNAL */
+       }
+
+       return 0;
+}
+
+bool
+AudioTrack::can_use_mode (TrackMode m, bool& bounce_required)
+{
+       switch (m) {
+       case Normal:
+               bounce_required = false;
+               return true;
+               
+       case Destructive:
+       default:
+               return _diskstream->can_become_destructive (bounce_required);
+       }
+}
+
 int
 AudioTrack::deprecated_use_diskstream_connections ()
 {
-       AudioDiskstream& diskstream = audio_diskstream();
+       boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
 
-       if (diskstream.deprecated_io_node == 0) {
+       if (diskstream->deprecated_io_node == 0) {
                return 0;
        }
 
        const XMLProperty* prop;
-       XMLNode& node (*diskstream.deprecated_io_node);
+       XMLNode& node (*diskstream->deprecated_io_node);
 
        /* don't do this more than once. */
 
-       diskstream.deprecated_io_node = 0;
+       diskstream->deprecated_io_node = 0;
 
-       set_input_minimum (-1);
-       set_input_maximum (-1);
-       set_output_minimum (-1);
-       set_output_maximum (-1);
+       set_input_minimum (ChanCount::ZERO);
+       set_input_maximum (ChanCount::INFINITE);
+       set_output_minimum (ChanCount::ZERO);
+       set_output_maximum (ChanCount::INFINITE);
        
        if ((prop = node.property ("gain")) != 0) {
                set_gain (atof (prop->value().c_str()), this);
@@ -97,22 +135,22 @@ AudioTrack::deprecated_use_diskstream_connections ()
        }
 
        if ((prop = node.property ("input-connection")) != 0) {
-               Connection* c = _session.connection_by_name (prop->value());
+               boost::shared_ptr<Bundle> c = _session.bundle_by_name (prop->value());
                
                if (c == 0) {
-                       error << string_compose(_("Unknown connection \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
+                       error << string_compose(_("Unknown bundle \"%1\" listed for input of %2"), prop->value(), _name) << endmsg;
                        
-                       if ((c = _session.connection_by_name (_("in 1"))) == 0) {
-                               error << _("No input connections available as a replacement")
+                       if ((c = _session.bundle_by_name (_("in 1"))) == 0) {
+                               error << _("No input bundles available as a replacement")
                                << endmsg;
                                return -1;
                        } else {
-                               info << string_compose (_("Connection %1 was not available - \"in 1\" used instead"), prop->value())
+                               info << string_compose (_("Bundle %1 was not available - \"in 1\" used instead"), prop->value())
                               << endmsg;
                        }
                }
 
-               use_input_connection (*c, this);
+               connect_input_ports_to_bundle (c, this);
 
        } else if ((prop = node.property ("inputs")) != 0) {
                if (set_inputs (prop->value())) {
@@ -125,17 +163,13 @@ AudioTrack::deprecated_use_diskstream_connections ()
 }
 
 int
-AudioTrack::set_diskstream (AudioDiskstream& ds, void *src)
+AudioTrack::set_diskstream (boost::shared_ptr<AudioDiskstream> ds, void *src)
 {
-       if (_diskstream) {
-               _diskstream->unref();
-       }
-
-       _diskstream = &ds.ref();
+       _diskstream = ds;
        _diskstream->set_io (*this);
        _diskstream->set_destructive (_mode == Destructive);
 
-       if (audio_diskstream().deprecated_io_node) {
+       if (audio_diskstream()->deprecated_io_node) {
 
                if (!connecting_legal) {
                        ConnectingLegal.connect (mem_fun (*this, &AudioTrack::deprecated_use_diskstream_connections));
@@ -158,54 +192,55 @@ AudioTrack::set_diskstream (AudioDiskstream& ds, void *src)
 int 
 AudioTrack::use_diskstream (string name)
 {
-       AudioDiskstream *dstream;
+       boost::shared_ptr<AudioDiskstream> dstream;
 
-       if ((dstream = dynamic_cast<AudioDiskstream*>(_session.diskstream_by_name (name))) == 0) {
-         error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
+       if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream>(_session.diskstream_by_name (name))) == 0) {
+               error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), name) << endmsg;
                return -1;
        }
        
-       return set_diskstream (*dstream, this);
+       return set_diskstream (dstream, this);
 }
 
 int 
 AudioTrack::use_diskstream (const PBD::ID& id)
 {
-       AudioDiskstream *dstream;
+       boost::shared_ptr<AudioDiskstream> dstream;
 
-       if ((dstream = dynamic_cast<AudioDiskstream*>(_session.diskstream_by_id (id))) == 0) {
+       if ((dstream = boost::dynamic_pointer_cast<AudioDiskstream> (_session.diskstream_by_id (id))) == 0) {
                error << string_compose(_("AudioTrack: audio diskstream \"%1\" not known by session"), id) << endmsg;
                return -1;
        }
        
-       return set_diskstream (*dstream, this);
+       return set_diskstream (dstream, this);
 }
 
-AudioDiskstream&
+boost::shared_ptr<AudioDiskstream>
 AudioTrack::audio_diskstream() const
 {
-       return *dynamic_cast<AudioDiskstream*>(_diskstream);
+       return boost::dynamic_pointer_cast<AudioDiskstream>(_diskstream);
 }
 
 int
 AudioTrack::set_state (const XMLNode& node)
+{
+       return _set_state (node, true);
+}
+
+int
+AudioTrack::_set_state (const XMLNode& node, bool call_base)
 {
        const XMLProperty *prop;
        XMLNodeConstIterator iter;
 
-       if (Route::set_state (node)) {
-               return -1;
+       if (call_base) {
+               if (Route::_set_state (node, call_base)) {
+                       return -1;
+               }
        }
 
        if ((prop = node.property (X_("mode"))) != 0) {
-               if (prop->value() == X_("normal")) {
-                       _mode = Normal;
-               } else if (prop->value() == X_("destructive")) {
-                       _mode = Destructive;
-               } else {
-                       warning << string_compose ("unknown audio track mode \"%1\" seen and ignored", prop->value()) << endmsg;
-                       _mode = Normal;
-               }
+               _mode = TrackMode (string_2_enum (prop->value(), _mode));
        } else {
                _mode = Normal;
        }
@@ -242,12 +277,9 @@ AudioTrack::set_state (const XMLNode& node)
        for (niter = nlist.begin(); niter != nlist.end(); ++niter){
                child = *niter;
 
-               if (child->name() == X_("remote_control")) {
-                       if ((prop = child->property (X_("id"))) != 0) {
-                               int32_t x;
-                               sscanf (prop->value().c_str(), "%d", &x);
-                               set_remote_control_id (x);
-                       }
+               if (child->name() == X_("recenable")) {
+                       _rec_enable_control->set_state (*child);
+                       _session.add_controllable (_rec_enable_control);
                }
        }
 
@@ -270,12 +302,11 @@ AudioTrack::state(bool full_state)
 
                freeze_node = new XMLNode (X_("freeze-info"));
                freeze_node->add_property ("playlist", _freeze_record.playlist->name());
-               snprintf (buf, sizeof (buf), "%d", (int) _freeze_record.state);
-               freeze_node->add_property ("state", buf);
+               freeze_node->add_property ("state", enum_2_string (_freeze_record.state));
 
-               for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
-                       inode = new XMLNode (X_("insert"));
-                       (*i)->id.print (buf);
+               for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
+                       inode = new XMLNode (X_("processor"));
+                       (*i)->id.print (buf, sizeof (buf));
                        inode->add_property (X_("id"), buf);
                        inode->add_child_copy ((*i)->state);
                
@@ -288,30 +319,11 @@ AudioTrack::state(bool full_state)
        /* Alignment: act as a proxy for the diskstream */
        
        XMLNode* align_node = new XMLNode (X_("alignment"));
-       switch (_diskstream->alignment_style()) {
-       case ExistingMaterial:
-               snprintf (buf, sizeof (buf), X_("existing"));
-               break;
-       case CaptureTime:
-               snprintf (buf, sizeof (buf), X_("capture"));
-               break;
-       }
-       align_node->add_property (X_("style"), buf);
+       AlignStyle as = _diskstream->alignment_style ();
+       align_node->add_property (X_("style"), enum_2_string (as));
        root.add_child_nocopy (*align_node);
 
-       XMLNode* remote_control_node = new XMLNode (X_("remote_control"));
-       snprintf (buf, sizeof (buf), "%d", _remote_control_id);
-       remote_control_node->add_property (X_("id"), buf);
-       root.add_child_nocopy (*remote_control_node);
-
-       switch (_mode) {
-       case Normal:
-               root.add_property (X_("mode"), X_("normal"));
-               break;
-       case Destructive:
-               root.add_property (X_("mode"), X_("destructive"));
-               break;
-       }
+       root.add_property (X_("mode"), enum_2_string (_mode));
 
        /* we don't return diskstream state because we don't
           own the diskstream exclusively. control of the diskstream
@@ -319,9 +331,11 @@ AudioTrack::state(bool full_state)
           diskstream.
        */
 
-       _diskstream->id().print (buf);
+       _diskstream->id().print (buf, sizeof (buf));
        root.add_property ("diskstream-id", buf);
 
+       root.add_child_nocopy (_rec_enable_control->get_state());
+
        return root;
 }
 
@@ -346,31 +360,31 @@ AudioTrack::set_state_part_two ()
                _freeze_record.have_mementos = false;
                _freeze_record.state = Frozen;
                
-               for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
+               for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
                        delete *i;
                }
-               _freeze_record.insert_info.clear ();
+               _freeze_record.processor_info.clear ();
                
                if ((prop = fnode->property (X_("playlist"))) != 0) {
-                       Playlist* pl = _session.playlist_by_name (prop->value());
+                       boost::shared_ptr<Playlist> pl = _session.playlist_by_name (prop->value());
                        if (pl) {
-                               _freeze_record.playlist = dynamic_cast<AudioPlaylist*> (pl);
+                               _freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist> (pl);
                        } else {
-                               _freeze_record.playlist = 0;
+                               _freeze_record.playlist.reset ();
                                _freeze_record.state = NoFreeze;
                        return;
                        }
                }
                
                if ((prop = fnode->property (X_("state"))) != 0) {
-                       _freeze_record.state = (FreezeState) atoi (prop->value().c_str());
+                       _freeze_record.state = FreezeState (string_2_enum (prop->value(), _freeze_record.state));
                }
                
                XMLNodeConstIterator citer;
                XMLNodeList clist = fnode->children();
                
                for (citer = clist.begin(); citer != clist.end(); ++citer) {
-                       if ((*citer)->name() != X_("insert")) {
+                       if ((*citer)->name() != X_("processor")) {
                                continue;
                        }
                        
@@ -378,10 +392,10 @@ AudioTrack::set_state_part_two ()
                                continue;
                        }
                        
-                       FreezeRecordInsertInfo* frii = new FreezeRecordInsertInfo (*((*citer)->children().front()),
-                                                                                  boost::shared_ptr<Insert>());
+                       FreezeRecordProcessorInfo* frii = new FreezeRecordProcessorInfo (*((*citer)->children().front()),
+                                                                                  boost::shared_ptr<Processor>());
                        frii->id = prop->value ();
-                       _freeze_record.insert_info.push_back (frii);
+                       _freeze_record.processor_info.push_back (frii);
                }
        }
 
@@ -390,34 +404,31 @@ AudioTrack::set_state_part_two ()
        if ((fnode = find_named_node (*pending_state, X_("alignment"))) != 0) {
 
                if ((prop = fnode->property (X_("style"))) != 0) {
-                       if (prop->value() == "existing") {
-                               _diskstream->set_persistent_align_style (ExistingMaterial);
-                       } else if (prop->value() == "capture") {
-                               _diskstream->set_persistent_align_style (CaptureTime);
+
+                       /* 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);
                }
        }
        return;
 }      
 
-uint32_t
-AudioTrack::n_process_buffers ()
-{
-       return max ((uint32_t) _diskstream->n_channels(), redirect_max_outs);
-}
-
-void
-AudioTrack::passthru_silence (jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t nframes, jack_nframes_t offset, int declick, bool meter)
-{
-       uint32_t nbufs = n_process_buffers ();
-       process_output_buffers (_session.get_silent_buffers (nbufs), nbufs, start_frame, end_frame, nframes, offset, true, declick, meter);
-}
-
 int 
-AudioTrack::no_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t offset, 
+AudioTrack::no_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, 
                     bool session_state_changing, bool can_record, bool rec_monitors_input)
 {
-       if (n_outputs() == 0) {
+       if (n_outputs().n_total() == 0) {
                return 0;
        }
 
@@ -434,7 +445,7 @@ AudioTrack::no_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nf
                return 0;
        }
 
-       audio_diskstream().check_record_status (start_frame, nframes, can_record);
+       audio_diskstream()->check_record_status (start_frame, nframes, can_record);
 
        bool send_silence;
        
@@ -446,19 +457,24 @@ AudioTrack::no_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nf
                send_silence = true;
        } else {
 
-               if (_session.get_auto_input()) {
-                       if (Config->get_use_sw_monitoring()) {
+               if (!Config->get_tape_machine_mode()) {
+                       /* 
+                          ADATs work in a strange way.. 
+                          they monitor input always when stopped.and auto-input is engaged. 
+                       */
+                       if ((Config->get_monitoring_model() == SoftwareMonitoring) && (Config->get_auto_input () || _diskstream->record_enabled())) {
                                send_silence = false;
                        } else {
                                send_silence = true;
                        }
                } else {
-                       if (_diskstream->record_enabled()) {
-                               if (Config->get_use_sw_monitoring()) {
-                                       send_silence = false;
-                               } else {
-                                       send_silence = true;
-                               }
+                       /* 
+                          Other machines switch to input on stop if the track is record enabled,
+                          regardless of the auto input setting (auto input only changes the 
+                          monitoring state when the transport is rolling) 
+                       */
+                       if ((Config->get_monitoring_model() == SoftwareMonitoring) && _diskstream->record_enabled()) {
+                               send_silence = false;
                        } else {
                                send_silence = true;
                        }
@@ -494,25 +510,26 @@ AudioTrack::no_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nf
 }
 
 int
-AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t offset, int declick,
+AudioTrack::roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, int declick,
                  bool can_record, bool rec_monitors_input)
 {
        int dret;
        Sample* b;
        Sample* tmpb;
-       jack_nframes_t transport_frame;
-       AudioDiskstream& diskstream = audio_diskstream();
+       nframes_t transport_frame;
+       boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
        
        {
-               Glib::RWLock::ReaderLock lm (redirect_lock, Glib::TRY_LOCK);
+               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, false);
                }
        }
+
        
-       if (n_outputs() == 0 && _redirects.empty()) {
+       if (n_outputs().n_total() == 0 && _processors.empty()) {
                return 0;
        }
 
@@ -523,18 +540,20 @@ AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nfram
 
        transport_frame = _session.transport_frame();
 
+       prepare_inputs( nframes, offset );
+
        if ((nframes = check_initial_delay (nframes, offset, 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, 0, can_record, rec_monitors_input);
+               return diskstream->process (transport_frame, 0, 0, can_record, rec_monitors_input);
        } 
 
        _silent = false;
        apply_gain_automation = false;
 
-       if ((dret = diskstream.process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
+       if ((dret = diskstream->process (transport_frame, nframes, offset, can_record, rec_monitors_input)) != 0) {
                
                silence (nframes, offset);
 
@@ -547,7 +566,7 @@ AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nfram
                just_meter_input (start_frame, end_frame, nframes, offset);
        }
 
-       if (diskstream.record_enabled() && !can_record && !_session.get_auto_input()) {
+       if (diskstream->record_enabled() && !can_record && !Config->get_auto_input()) {
 
                /* not actually recording, but we want to hear the input material anyway,
                   at least potentially (depending on monitoring options)
@@ -555,7 +574,7 @@ AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nfram
 
                passthru (start_frame, end_frame, nframes, offset, 0, true);
 
-       } else if ((b = diskstream.playback_buffer(0)) != 0) {
+       } else if ((b = diskstream->playback_buffer(0)) != 0) {
 
                /*
                  XXX is it true that the earlier test on n_outputs()
@@ -567,35 +586,89 @@ AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nfram
 
                
                /* copy the diskstream data to all output buffers */
-               
-               vector<Sample*>& bufs = _session.get_passthru_buffers ();
-               uint32_t limit = n_process_buffers ();
-               
+
+               size_t limit = n_process_buffers().n_audio();
+               BufferSet& bufs = _session.get_scratch_buffers ();
+               const size_t blimit = bufs.count().n_audio();
+
                uint32_t n;
                uint32_t i;
 
+               if (limit > blimit) {
+
+                       /* example case: auditioner configured for stereo output,
+                          but loaded with an 8 channel file. there are only
+                          2 passthrough buffers, but n_process_buffers() will
+                          return 8.
+                          
+                          arbitrary decision: map all channels in the diskstream
+                          to the outputs available.
+                       */
+
+                       float scaling = limit/blimit;
+                       
+                       for (i = 0, n = 1; i < blimit; ++i, ++n) {
+
+                               /* first time through just copy a channel into 
+                                  the output buffer.
+                               */
+                               
+                               Sample* bb = bufs.get_audio (i).data();
+
+                               for (nframes_t xx = 0; xx < nframes; ++xx) {
+                                       bb[xx] = b[xx] * scaling;
+                               }
 
-               for (i = 0, n = 1; i < limit; ++i, ++n) {
-                       memcpy (bufs[i], b, sizeof (Sample) * nframes); 
-                       if (n < diskstream.n_channels()) {
-                               tmpb = diskstream.playback_buffer(n);
-                               if (tmpb!=0) {
-                                       b = tmpb;
+                               if (n < diskstream->n_channels().n_audio()) {
+                                       tmpb = diskstream->playback_buffer(n);
+                                       if (tmpb!=0) {
+                                               b = tmpb;
+                                       }
+                               }
+                       }
+
+                       for (;i < limit; ++i, ++n) {
+                               
+                               /* for all remaining channels, sum with existing
+                                  data in the output buffers 
+                               */
+                               
+                               bufs.get_audio (i%blimit).accumulate_with_gain_from (b, nframes, 0, scaling);
+                               
+                               if (n < diskstream->n_channels().n_audio()) {
+                                       tmpb = diskstream->playback_buffer(n);
+                                       if (tmpb!=0) {
+                                               b = tmpb;
+                                       }
+                               }
+                               
+                       }
+
+                       limit = blimit;
+
+               } else {
+                       for (i = 0, n = 1; i < limit; ++i, ++n) {
+                               memcpy (bufs.get_audio (i).data(), b, sizeof (Sample) * nframes); 
+                               if (n < diskstream->n_channels().n_audio()) {
+                                       tmpb = diskstream->playback_buffer(n);
+                                       if (tmpb!=0) {
+                                               b = tmpb;
+                                       }
                                }
                        }
                }
 
                /* don't waste time with automation if we're recording or we've just stopped (yes it can happen) */
 
-               if (!diskstream.record_enabled() && _session.transport_rolling()) {
-                       Glib::Mutex::Lock am (automation_lock, Glib::TRY_LOCK);
+               if (!diskstream->record_enabled() && _session.transport_rolling()) {
+                       Glib::Mutex::Lock am (data().control_lock(), Glib::TRY_LOCK);
                        
-                       if (am.locked() && gain_automation_playback()) {
-                               apply_gain_automation = _gain_automation_curve.rt_safe_get_vector (start_frame, end_frame, _session.gain_automation_buffer(), nframes);
+                       if (am.locked() && gain_control()->automation_playback()) {
+                               apply_gain_automation = gain_control()->list()->curve().rt_safe_get_vector (start_frame, end_frame, _session.gain_automation_buffer(), nframes);
                        }
                }
 
-               process_output_buffers (bufs, limit, start_frame, end_frame, nframes, offset, (!_session.get_record_enabled() || !_session.get_do_not_record_plugins()), declick, (_meter_point != MeterInput));
+               process_output_buffers (bufs, start_frame, end_frame, nframes, offset, (!_session.get_record_enabled() || !Config->get_do_not_record_plugins()), declick, (_meter_point != MeterInput));
                
        } else {
                /* problem with the diskstream; just be quiet for a bit */
@@ -606,10 +679,10 @@ AudioTrack::roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nfram
 }
 
 int
-AudioTrack::silent_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jack_nframes_t end_frame, jack_nframes_t offset, 
+AudioTrack::silent_roll (nframes_t nframes, nframes_t start_frame, nframes_t end_frame, nframes_t offset, 
                         bool can_record, bool rec_monitors_input)
 {
-       if (n_outputs() == 0 && _redirects.empty()) {
+       if (n_outputs().n_total() == 0 && _processors.empty()) {
                return 0;
        }
 
@@ -623,61 +696,61 @@ AudioTrack::silent_roll (jack_nframes_t nframes, jack_nframes_t start_frame, jac
 
        silence (nframes, offset);
 
-       return audio_diskstream().process (_session.transport_frame() + offset, nframes, offset, can_record, rec_monitors_input);
+       return audio_diskstream()->process (_session.transport_frame() + offset, nframes, offset, can_record, rec_monitors_input);
 }
 
 int
-AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, jack_nframes_t start, jack_nframes_t nframes)
+AudioTrack::export_stuff (BufferSet& buffers, nframes_t start, nframes_t nframes)
 {
        gain_t  gain_automation[nframes];
        gain_t  gain_buffer[nframes];
        float   mix_buffer[nframes];
-       RedirectList::iterator i;
+       ProcessorList::iterator i;
        bool post_fader_work = false;
        gain_t this_gain = _gain;
-       vector<Sample*>::iterator bi;
-       Sample * b;
-       AudioDiskstream& diskstream = audio_diskstream();
+       boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
        
-       Glib::RWLock::ReaderLock rlock (redirect_lock);
+       Glib::RWLock::ReaderLock rlock (_processor_lock);
 
-       // FIXME
-       AudioPlaylist* const apl = dynamic_cast<AudioPlaylist*>(diskstream.playlist());
+       boost::shared_ptr<AudioPlaylist> apl = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist());
        assert(apl);
 
-       if (apl->read (buffers[0], mix_buffer, gain_buffer, start, nframes) != nframes) {
+       assert(buffers.get_audio(0).capacity() >= nframes);
+
+       if (apl->read (buffers.get_audio(0).data(), mix_buffer, gain_buffer, start, nframes) != nframes) {
                return -1;
        }
 
+       assert(buffers.count().n_audio() >= 1);
        uint32_t n=1;
-       bi = buffers.begin();
-       b = buffers[0];
+       Sample* b = buffers.get_audio(0).data();
+       BufferSet::audio_iterator bi = buffers.audio_begin();
        ++bi;
-       for (; bi != buffers.end(); ++bi, ++n) {
-               if (n < diskstream.n_channels()) {
-                       if (apl->read ((*bi), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
+       for ( ; bi != buffers.audio_end(); ++bi, ++n) {
+               if (n < diskstream->n_channels().n_audio()) {
+                       if (apl->read (bi->data(), mix_buffer, gain_buffer, start, nframes, n) != nframes) {
                                return -1;
                        }
-                       b = (*bi);
+                       b = bi->data();
                }
                else {
                        /* duplicate last across remaining buffers */
-                       memcpy ((*bi), b, sizeof (Sample) * nframes); 
+                       memcpy (bi->data(), b, sizeof (Sample) * nframes); 
                }
        }
 
 
-       /* note: only run inserts during export. other layers in the machinery
-          will already have checked that there are no external port inserts.
+       /* note: only run processors during export. other layers in the machinery
+          will already have checked that there are no external port processors.
        */
        
-       for (i = _redirects.begin(); i != _redirects.end(); ++i) {
-               boost::shared_ptr<Insert> insert;
+       for (i = _processors.begin(); i != _processors.end(); ++i) {
+               boost::shared_ptr<Processor> processor;
                
-               if ((insert = boost::dynamic_pointer_cast<Insert>(*i)) != 0) {
-                       switch (insert->placement()) {
+               if ((processor = boost::dynamic_pointer_cast<Processor>(*i)) != 0) {
+                       switch (processor->placement()) {
                        case PreFader:
-                               insert->run (buffers, nbufs, nframes, 0);
+                               processor->run_in_place (buffers, start, start+nframes, nframes, 0);
                                break;
                        case PostFader:
                                post_fader_work = true;
@@ -686,22 +759,22 @@ AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, jack_nframes
                }
        }
        
-       if (_gain_automation_curve.automation_state() == Play) {
+       if (gain_control()->automation_state() == Play) {
                
-               _gain_automation_curve.get_vector (start, start + nframes, gain_automation, nframes);
+               gain_control()->list()->curve().get_vector (start, start + nframes, gain_automation, nframes);
 
-               for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
-                       Sample *b = *bi;
-                       for (jack_nframes_t n = 0; n < nframes; ++n) {
+               for (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
+                       Sample *b = bi->data();
+                       for (nframes_t n = 0; n < nframes; ++n) {
                                b[n] *= gain_automation[n];
                        }
                }
 
        } else {
 
-               for (bi = buffers.begin(); bi != buffers.end(); ++bi) {
-                       Sample *b = *bi;
-                       for (jack_nframes_t n = 0; n < nframes; ++n) {
+               for (BufferSet::audio_iterator bi = buffers.audio_begin(); bi != buffers.audio_end(); ++bi) {
+                       Sample *b = bi->data();
+                       for (nframes_t n = 0; n < nframes; ++n) {
                                b[n] *= this_gain;
                        }
                }
@@ -709,15 +782,15 @@ AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, jack_nframes
 
        if (post_fader_work) {
 
-               for (i = _redirects.begin(); i != _redirects.end(); ++i) {
-                       boost::shared_ptr<PluginInsert> insert;
+               for (i = _processors.begin(); i != _processors.end(); ++i) {
+                       boost::shared_ptr<PluginInsert> processor;
                        
-                       if ((insert = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
+                       if ((processor = boost::dynamic_pointer_cast<PluginInsert>(*i)) != 0) {
                                switch ((*i)->placement()) {
                                case PreFader:
                                        break;
                                case PostFader:
-                                       insert->run (buffers, nbufs, nframes, 0);
+                                       processor->run_in_place (buffers, start, start+nframes, nframes, 0);
                                        break;
                                }
                        }
@@ -727,33 +800,31 @@ AudioTrack::export_stuff (vector<Sample*>& buffers, uint32_t nbufs, jack_nframes
        return 0;
 }
 
-void
+boost::shared_ptr<Region>
 AudioTrack::bounce (InterThreadInfo& itt)
 {
-       vector<AudioSource*> srcs;
-       _session.write_one_audio_track (*this, 0, _session.current_end_frame(), false, srcs, itt);
+       vector<boost::shared_ptr<Source> > srcs;
+       return _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), false, srcs, itt);
 }
 
-
-void
-AudioTrack::bounce_range (jack_nframes_t start, jack_nframes_t end, InterThreadInfo& itt)
+boost::shared_ptr<Region>
+AudioTrack::bounce_range (nframes_t start, nframes_t end, InterThreadInfo& itt)
 {
-       vector<AudioSource*> srcs;
-       _session.write_one_audio_track (*this, start, end, false, srcs, itt);
+       vector<boost::shared_ptr<Source> > srcs;
+       return _session.write_one_track (*this, start, end, false, srcs, itt);
 }
 
 void
 AudioTrack::freeze (InterThreadInfo& itt)
 {
-       vector<AudioSource*> srcs;
+       vector<boost::shared_ptr<Source> > srcs;
        string new_playlist_name;
-       Playlist* new_playlist;
+       boost::shared_ptr<Playlist> new_playlist;
        string dir;
-       AudioRegion* region;
        string region_name;
-       AudioDiskstream& diskstream = audio_diskstream();
+       boost::shared_ptr<AudioDiskstream> diskstream = audio_diskstream();
        
-       if ((_freeze_record.playlist = dynamic_cast<AudioPlaylist*>(diskstream.playlist())) == 0) {
+       if ((_freeze_record.playlist = boost::dynamic_pointer_cast<AudioPlaylist>(diskstream->playlist())) == 0) {
                return;
        }
 
@@ -781,53 +852,66 @@ AudioTrack::freeze (InterThreadInfo& itt)
                return;
        }
 
-       if (_session.write_one_audio_track (*this, 0, _session.current_end_frame(), true, srcs, itt)) {
+       boost::shared_ptr<Region> res;
+
+       if ((res = _session.write_one_track (*this, _session.current_start_frame(), _session.current_end_frame(), true, srcs, itt)) == 0) {
                return;
        }
 
-       _freeze_record.insert_info.clear ();
+       _freeze_record.processor_info.clear ();
        _freeze_record.have_mementos = true;
 
        {
-               Glib::RWLock::ReaderLock lm (redirect_lock);
+               Glib::RWLock::ReaderLock lm (_processor_lock);
                
-               for (RedirectList::iterator r = _redirects.begin(); r != _redirects.end(); ++r) {
+               for (ProcessorList::iterator r = _processors.begin(); r != _processors.end(); ++r) {
                        
-                       boost::shared_ptr<Insert> insert;
+                       boost::shared_ptr<Processor> processor;
 
-                       if ((insert = boost::dynamic_pointer_cast<Insert>(*r)) != 0) {
-                               
-                               FreezeRecordInsertInfo* frii  = new FreezeRecordInsertInfo ((*r)->get_state(), insert);
+                       if ((processor = boost::dynamic_pointer_cast<Processor>(*r)) != 0) {
                                
-                               frii->id = insert->id();
-                               frii->memento = (*r)->get_memento();
+                               FreezeRecordProcessorInfo* frii  = new FreezeRecordProcessorInfo ((*r)->get_state(), processor);
                                
-                               _freeze_record.insert_info.push_back (frii);
+                               frii->id = processor->id();
+
+                               _freeze_record.processor_info.push_back (frii);
                                
-                               /* now deactivate the insert */
+                               /* now deactivate the processor */
                                
-                               insert->set_active (false, this);
+                               processor->set_active (false);
+                               _session.set_dirty ();
                        }
                }
        }
 
-       new_playlist = new AudioPlaylist (_session, new_playlist_name, false);
+       new_playlist = PlaylistFactory::create (DataType::AUDIO, _session, new_playlist_name, false);
+
+       _freeze_record.gain = _gain;
+       _freeze_record.gain_automation_state = _gain_control->automation_state();
+       _freeze_record.pan_automation_state = _panner->automation_state();
+
        region_name = new_playlist_name;
 
        /* create a new region from all filesources, keep it private */
 
-       region = new AudioRegion (srcs, 0, srcs[0]->length(), 
-                                 region_name, 0, 
-                                 (AudioRegion::Flag) (AudioRegion::WholeFile|AudioRegion::DefaultFlags),
-                                 false);
+       boost::shared_ptr<Region> region (RegionFactory::create (srcs, 0, srcs[0]->length(), 
+                                                                region_name, 0, 
+                                                                (Region::Flag) (Region::WholeFile|Region::DefaultFlags),
+                                                                false));
 
-       new_playlist->set_orig_diskstream_id (diskstream.id());
-       new_playlist->add_region (*region, 0);
+       new_playlist->set_orig_diskstream_id (diskstream->id());
+       new_playlist->add_region (region, _session.current_start_frame());
        new_playlist->set_frozen (true);
        region->set_locked (true);
 
-       diskstream.use_playlist (dynamic_cast<AudioPlaylist*>(new_playlist));
-       diskstream.set_record_enabled (false);
+       diskstream->use_playlist (boost::dynamic_pointer_cast<AudioPlaylist>(new_playlist));
+       diskstream->set_record_enabled (false);
+
+       /* reset stuff that has already been accounted for in the freeze process */
+       
+       set_gain (1.0, this);
+       _gain_control->set_automation_state (Off);
+       _panner->set_automation_state (Off);
 
        _freeze_record.state = Frozen;
        FreezeChange(); /* EMIT SIGNAL */
@@ -837,19 +921,19 @@ void
 AudioTrack::unfreeze ()
 {
        if (_freeze_record.playlist) {
-               audio_diskstream().use_playlist (_freeze_record.playlist);
+               audio_diskstream()->use_playlist (_freeze_record.playlist);
 
                if (_freeze_record.have_mementos) {
 
-                       for (vector<FreezeRecordInsertInfo*>::iterator i = _freeze_record.insert_info.begin(); i != _freeze_record.insert_info.end(); ++i) {
+                       for (vector<FreezeRecordProcessorInfo*>::iterator i = _freeze_record.processor_info.begin(); i != _freeze_record.processor_info.end(); ++i) {
                                (*i)->memento ();
                        }
 
                } else {
 
-                       Glib::RWLock::ReaderLock lm (redirect_lock); // should this be a write lock? jlc
-                       for (RedirectList::iterator i = _redirects.begin(); i != _redirects.end(); ++i) {
-                               for (vector<FreezeRecordInsertInfo*>::iterator ii = _freeze_record.insert_info.begin(); ii != _freeze_record.insert_info.end(); ++ii) {
+                       Glib::RWLock::ReaderLock lm (_processor_lock); // should this be a write lock? jlc
+                       for (ProcessorList::iterator i = _processors.begin(); i != _processors.end(); ++i) {
+                               for (vector<FreezeRecordProcessorInfo*>::iterator ii = _freeze_record.processor_info.begin(); ii != _freeze_record.processor_info.end(); ++ii) {
                                        if ((*ii)->id == (*i)->id()) {
                                                (*i)->set_state (((*ii)->state));
                                                break;
@@ -858,7 +942,10 @@ AudioTrack::unfreeze ()
                        }
                }
                
-               _freeze_record.playlist = 0;
+               _freeze_record.playlist.reset ();
+               set_gain (_freeze_record.gain, this);
+               _gain_control->set_automation_state (_freeze_record.gain_automation_state);
+               _panner->set_automation_state (_freeze_record.pan_automation_state);
        }
 
        _freeze_record.state = UnFrozen;