remove unused arguments to keep gcc quiet
[ardour.git] / gtk2_ardour / editor_audio_import.cc
1 /*
2     Copyright (C) 2000-2006 Paul Davis
3
4     This program is free software; you can redistribute it and/or modify
5     it under the terms of the GNU General Public License as published by
6     the Free Software Foundation; either version 2 of the License, or
7     (at your option) any later version.
8
9     This program is distributed in the hope that it will be useful,
10     but WITHOUT ANY WARRANTY; without even the implied warranty of
11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12     GNU General Public License for more details.
13
14     You should have received a copy of the GNU General Public License
15     along with this program; if not, write to the Free Software
16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17
18 */
19
20 #include <sys/types.h>
21 #include <sys/stat.h>
22 #include <sys/time.h>
23 #include <errno.h>
24 #include <unistd.h>
25 #include <algorithm>
26
27 #include <sndfile.h>
28
29 #include "pbd/pthread_utils.h"
30 #include "pbd/basename.h"
31 #include "pbd/shortpath.h"
32 #include "pbd/stateful_diff_command.h"
33
34 #include <gtkmm2ext/choice.h>
35
36 #include "ardour/session.h"
37 #include "ardour/session_directory.h"
38 #include "ardour/audioplaylist.h"
39 #include "ardour/audioregion.h"
40 #include "ardour/audio_diskstream.h"
41 #include "ardour/midi_track.h"
42 #include "ardour/midi_region.h"
43 #include "ardour/utils.h"
44 #include "ardour/audio_track.h"
45 #include "ardour/audioplaylist.h"
46 #include "ardour/audiofilesource.h"
47 #include "ardour/region_factory.h"
48 #include "ardour/source_factory.h"
49 #include "ardour/session.h"
50 #include "ardour/smf_source.h"
51 #include "ardour/operations.h"
52 #include "pbd/memento_command.h"
53
54 #include "ardour_ui.h"
55 #include "editor.h"
56 #include "sfdb_ui.h"
57 #include "editing.h"
58 #include "audio_time_axis.h"
59 #include "midi_time_axis.h"
60 #include "session_import_dialog.h"
61 #include "utils.h"
62 #include "gui_thread.h"
63 #include "interthread_progress_window.h"
64 #include "mouse_cursors.h"
65 #include "editor_cursors.h"
66
67 #include "i18n.h"
68
69 using namespace std;
70 using namespace ARDOUR;
71 using namespace PBD;
72 using namespace Gtk;
73 using namespace Gtkmm2ext;
74 using namespace Editing;
75 using std::string;
76
77 /* Functions supporting the incorporation of external (non-captured) audio material into ardour */
78
79 void
80 Editor::add_external_audio_action (ImportMode mode_hint)
81 {
82         if (_session == 0) {
83                 MessageDialog msg (_("You can't import or embed an audiofile until you have a session loaded."));
84                 msg.run ();
85                 return;
86         }
87         
88         if (sfbrowser == 0) {
89                 sfbrowser = new SoundFileOmega (*this, _("Add Existing Media"), _session, 0, true, mode_hint);
90         } else {
91                 sfbrowser->set_mode (mode_hint);
92         }
93
94         external_audio_dialog ();
95 }
96
97 void
98 Editor::external_audio_dialog ()
99 {
100         vector<string> paths;
101         uint32_t track_cnt;
102
103         if (_session == 0) {
104                 MessageDialog msg (_("You can't import or embed an audiofile until you have a session loaded."));
105                 msg.run ();
106                 return;
107         }
108
109         track_cnt = 0;
110
111         for (TrackSelection::iterator x = selection->tracks.begin(); x != selection->tracks.end(); ++x) {
112                 AudioTimeAxisView* atv = dynamic_cast<AudioTimeAxisView*>(*x);
113
114                 if (!atv) {
115                         continue;
116                 } else if (atv->is_audio_track()) {
117                         track_cnt++;
118                 }
119         }
120
121         if (sfbrowser == 0) {
122                 sfbrowser = new SoundFileOmega (*this, _("Add Existing Media"), _session, track_cnt, true);
123         } else {
124                 sfbrowser->reset (track_cnt);
125         }
126
127         sfbrowser->show_all ();
128
129
130         bool keepRunning;
131
132         do {
133                 keepRunning = false;
134
135                 int response = sfbrowser->run ();
136
137                 switch (response) {
138                         case RESPONSE_APPLY:
139                                 // leave the dialog open
140                                 break;
141
142                         case RESPONSE_OK:
143                                 sfbrowser->hide ();
144                                 break;
145
146                         default:
147                                 // cancel from the browser - we are done
148                                 sfbrowser->hide ();
149                                 return;
150                 }
151
152                 /* lets do it */
153
154                 vector<string> upaths = sfbrowser->get_paths ();
155                 for (vector<string>::iterator x = upaths.begin(); x != upaths.end(); ++x) {
156                         paths.push_back (*x);
157                 }
158                 
159                 ImportPosition pos = sfbrowser->get_position ();
160                 ImportMode mode = sfbrowser->get_mode ();
161                 ImportDisposition chns = sfbrowser->get_channel_disposition ();
162                 framepos_t where;
163
164                 switch (pos) {
165                         case ImportAtEditPoint:
166                                 where = get_preferred_edit_position ();
167                                 break;
168                         case ImportAtTimestamp:
169                                 where = -1;
170                                 break;
171                         case ImportAtPlayhead:
172                                 where = playhead_cursor->current_frame;
173                                 break;
174                         case ImportAtStart:
175                                 where = _session->current_start_frame();
176                                 break;
177                 }
178
179                 SrcQuality quality = sfbrowser->get_src_quality();
180
181
182                 if (sfbrowser->copy_files_btn.get_active()) {
183                         do_import (paths, chns, mode, quality, where);
184                 } else {
185                         do_embed (paths, chns, mode, where);
186                 }
187
188                 if (response == RESPONSE_APPLY) {
189                         sfbrowser->clear_selection ();
190                         keepRunning = true;
191                 }
192
193         } while (keepRunning);
194 }
195
196 void
197 Editor::session_import_dialog ()
198 {
199         SessionImportDialog dialog (_session);
200         ensure_float (dialog);
201         dialog.run ();
202 }
203
204 typedef std::map<PBD::ID,boost::shared_ptr<ARDOUR::Source> > SourceMap;
205
206 /**
207  * Updating is still disabled, see note in libs/ardour/import.cc Session::import_audiofiles()
208  *
209  * all_or_nothing:
210  *   true  = show "Update", "Import" and "Skip"
211  *   false = show "Import", and "Cancel"
212  *
213  * Returns:
214  *     0  To update an existing source of the same name
215  *     1  To import/embed the file normally (make sure the new name will be unique)
216  *     2  If the user wants to skip this file
217  **/
218 int
219 Editor::check_whether_and_how_to_import(string path, bool all_or_nothing)
220 {
221         string wave_name (Glib::path_get_basename(path));
222
223         SourceMap all_sources = _session->get_sources();
224         bool already_exists = false;
225         uint32_t existing;
226
227         if ((existing = _session->count_sources_by_origin (path)) > 0) {
228                 already_exists = true;
229         }
230
231         int function = 1;
232
233         if (already_exists) {
234                 string message;
235                 if (all_or_nothing) {
236                         // updating is still disabled
237                         //message = string_compose(_("The session already contains a source file named %1. Do you want to update that file (and thus all regions using the file) or import this file as a new file?"),wave_name);
238                         message = string_compose (_("The session already contains a source file named %1.  Do you want to import %1 as a new file, or skip it?"), wave_name);
239                 } else {
240                         message = string_compose (_("The session already contains a source file named %1.  Do you want to import %2 as a new source, or skip it?"), wave_name, wave_name);
241
242                 }
243                 MessageDialog dialog(message, false, Gtk::MESSAGE_QUESTION, Gtk::BUTTONS_NONE, true);
244
245                 if (all_or_nothing) {
246                         // disabled
247                         //dialog.add_button("Update", 0);
248                         dialog.add_button("Import", 1);
249                         dialog.add_button("Skip",   2);
250                 } else {
251                         dialog.add_button("Import", 1);
252                         dialog.add_button("Cancel", 2);
253                 }
254
255                 //dialog.add_button("Skip all", 4); // All or rest?
256
257                 dialog.show();
258
259                 function = dialog.run ();
260
261                 dialog.hide();
262         }
263
264         return function;
265 }
266
267 boost::shared_ptr<AudioTrack>
268 Editor::get_nth_selected_audio_track (int nth) const
269 {
270         AudioTimeAxisView* atv;
271         TrackSelection::iterator x;
272
273         for (x = selection->tracks.begin(); nth > 0 && x != selection->tracks.end(); ++x) {
274
275                 atv = dynamic_cast<AudioTimeAxisView*>(*x);
276
277                 if (!atv) {
278                         continue;
279                 } else if (atv->is_audio_track()) {
280                         --nth;
281                 }
282         }
283
284         if (x == selection->tracks.end()) {
285                 atv = dynamic_cast<AudioTimeAxisView*>(selection->tracks.back());
286         } else {
287                 atv = dynamic_cast<AudioTimeAxisView*>(*x);
288         }
289
290         if (!atv || !atv->is_audio_track()) {
291                 return boost::shared_ptr<AudioTrack>();
292         }
293
294         return atv->audio_track();
295 }
296
297 boost::shared_ptr<MidiTrack>
298 Editor::get_nth_selected_midi_track (int nth) const
299 {
300         MidiTimeAxisView* mtv;
301         TrackSelection::iterator x;
302
303         for (x = selection->tracks.begin(); nth > 0 && x != selection->tracks.end(); ++x) {
304
305                 mtv = dynamic_cast<MidiTimeAxisView*>(*x);
306
307                 if (!mtv) {
308                         continue;
309                 } else if (mtv->is_midi_track()) {
310                         --nth;
311                 }
312         }
313
314         if (x == selection->tracks.end()) {
315                 mtv = dynamic_cast<MidiTimeAxisView*>(selection->tracks.back());
316         } else {
317                 mtv = dynamic_cast<MidiTimeAxisView*>(*x);
318         }
319
320         if (!mtv || !mtv->is_midi_track()) {
321                 return boost::shared_ptr<MidiTrack>();
322         }
323
324         return mtv->midi_track();
325 }
326
327 void
328 Editor::do_import (vector<string> paths, ImportDisposition chns, ImportMode mode, SrcQuality quality, framepos_t& pos)
329 {
330         boost::shared_ptr<Track> track;
331         vector<string> to_import;
332         int nth = 0;
333         bool use_timestamp = (pos == -1);
334
335         current_interthread_info = &import_status;
336         import_status.current = 1;
337         import_status.total = paths.size ();
338         import_status.all_done = false;
339
340         ImportProgressWindow ipw (&import_status, _("Import"), _("Cancel Import"));
341
342         bool ok = true;
343
344         if (chns == Editing::ImportMergeFiles) {
345
346                 /* create 1 region from all paths, add to 1 track,
347                    ignore "track"
348                 */
349
350                 bool cancel = false;
351                 for (vector<string>::iterator a = paths.begin(); a != paths.end(); ++a) {
352                         int check = check_whether_and_how_to_import(*a, false);
353                         if (check == 2) {
354                                 cancel = true;
355                                 break;
356                         }
357                 }
358
359                 if (cancel) {
360                         ok = false;
361                 } else {
362                         ipw.show ();
363                         ok = (import_sndfiles (paths, mode, quality, pos, 1, 1, track, false) == 0);
364                 }
365
366         } else {
367
368                 bool replace = false;
369
370                 for (vector<string>::iterator a = paths.begin(); a != paths.end(); ++a) {
371
372                         const int check = check_whether_and_how_to_import (*a, true);
373                         
374                         switch (check) {
375                         case 2:
376                                 // user said skip
377                                 continue;
378                         case 0:
379                                 fatal << "Updating existing sources should be disabled!" << endmsg;
380                                 /* NOTREACHED*/
381                                 break;
382                         case 1:
383                                 replace = false;
384                                 break;
385                         default:
386                                 fatal << "Illegal return " << check <<  " from check_whether_and_how_to_import()!" << endmsg;
387                                 /* NOTREACHED*/
388                         }
389
390                         /* have to reset this for every file we handle */
391                         
392                         if (use_timestamp) {
393                                 pos = -1;
394                         }
395
396                         ipw.show ();
397                                 
398                         switch (chns) {
399                         case Editing::ImportDistinctFiles:
400                                 
401                                 to_import.clear ();
402                                 to_import.push_back (*a);
403                                 
404                                 if (mode == Editing::ImportToTrack) {
405                                         track = get_nth_selected_audio_track (nth++);
406                                 }
407                         
408                                 ok = (import_sndfiles (to_import, mode, quality, pos, 1, -1, track, replace) == 0);
409                                 break;
410                                 
411                         case Editing::ImportDistinctChannels:
412                                 
413                                 to_import.clear ();
414                                 to_import.push_back (*a);
415                                 
416                                 ok = (import_sndfiles (to_import, mode, quality, pos, -1, -1, track, replace) == 0);
417                                 break;
418                                 
419                         case Editing::ImportSerializeFiles:
420                                 
421                                 to_import.clear ();
422                                 to_import.push_back (*a);
423
424                                 ok = (import_sndfiles (to_import, mode, quality, pos, 1, 1, track, replace) == 0);
425                                 break;
426
427                         case Editing::ImportMergeFiles:
428                                 // Not entered, handled in earlier if() branch
429                                 break;
430                         }
431                 }
432         }
433
434         if (ok) {
435                 _session->save_state ("");
436         }
437
438         import_status.all_done = true;
439 }
440
441 void
442 Editor::do_embed (vector<string> paths, ImportDisposition chns, ImportMode mode, framepos_t& pos)
443 {
444         boost::shared_ptr<Track> track;
445         bool check_sample_rate = true;
446         bool ok = false;
447         vector<string> to_embed;
448         bool multi = paths.size() > 1;
449         int nth = 0;
450
451         switch (chns) {
452         case Editing::ImportDistinctFiles:
453                 for (vector<string>::iterator a = paths.begin(); a != paths.end(); ++a) {
454
455                         to_embed.clear ();
456                         to_embed.push_back (*a);
457
458                         if (mode == Editing::ImportToTrack) {
459                                 track = get_nth_selected_audio_track (nth++);
460                         }
461
462                         if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, 1, -1, track) < -1) {
463                                 goto out;
464                         }
465                 }
466                 break;
467
468         case Editing::ImportDistinctChannels:
469                 for (vector<string>::iterator a = paths.begin(); a != paths.end(); ++a) {
470
471                         to_embed.clear ();
472                         to_embed.push_back (*a);
473
474                         if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, -1, -1, track) < -1) {
475                                 goto out;
476                         }
477                 }
478                 break;
479
480         case Editing::ImportMergeFiles:
481                 if (embed_sndfiles (paths, multi, check_sample_rate, mode, pos, 1, 1, track) < -1) {
482                         goto out;
483                 }
484                 break;
485
486         case Editing::ImportSerializeFiles:
487                 for (vector<string>::iterator a = paths.begin(); a != paths.end(); ++a) {
488
489                         to_embed.clear ();
490                         to_embed.push_back (*a);
491
492                         if (embed_sndfiles (to_embed, multi, check_sample_rate, mode, pos, 1, 1, track) < -1) {
493                                 goto out;
494                         }
495                 }
496                 break;
497         }
498
499         ok = true;
500
501   out:
502         if (ok) {
503                 _session->save_state ("");
504         }
505 }
506
507 int
508 Editor::import_sndfiles (vector<string> paths, ImportMode mode, SrcQuality quality, framepos_t& pos,
509                          int target_regions, int target_tracks, boost::shared_ptr<Track>& track, bool replace)
510 {
511         import_status.paths = paths;
512         import_status.done = false;
513         import_status.cancel = false;
514         import_status.freeze = false;
515         import_status.quality = quality;
516         import_status.replace_existing_source = replace;
517
518         import_status.mode = mode;
519         import_status.pos = pos;
520         import_status.target_tracks = target_tracks;
521         import_status.target_regions = target_regions;
522         import_status.track = track;
523         import_status.replace = replace;
524         
525         set_canvas_cursor (_cursors->wait);
526         gdk_flush ();
527
528         /* start import thread for this spec. this will ultimately call Session::import_audiofiles()
529            which, if successful, will add the files as regions to the region list. its up to us
530            (the GUI) to direct additional steps after that.
531         */
532
533         pthread_create_and_store ("import", &import_status.thread, _import_thread, this);
534         pthread_detach (import_status.thread);
535
536         while (!import_status.done && !import_status.cancel) {
537                 gtk_main_iteration ();
538         }
539
540         import_status.done = true;
541
542         int result = -1;
543
544         if (!import_status.cancel && !import_status.sources.empty()) {
545                 result = add_sources (
546                         import_status.paths,
547                         import_status.sources,
548                         import_status.pos,
549                         import_status.mode,
550                         import_status.target_regions,
551                         import_status.target_tracks,
552                         track, false
553                         );
554
555                 /* update position from results */
556
557                 pos = import_status.pos;
558         }
559
560         set_canvas_cursor (current_canvas_cursor);
561         return result;
562 }
563
564 int
565 Editor::embed_sndfiles (vector<string> paths, bool multifile,
566                         bool& check_sample_rate, ImportMode mode, framepos_t& pos, int target_regions, int target_tracks,
567                         boost::shared_ptr<Track>& track)
568 {
569         boost::shared_ptr<AudioFileSource> source;
570         SourceList sources;
571         string linked_path;
572         SoundFileInfo finfo;
573         int ret = 0;
574
575         set_canvas_cursor (_cursors->wait);
576         gdk_flush ();
577
578         for (vector<string>::iterator p = paths.begin(); p != paths.end(); ++p) {
579
580                 string path = *p;
581                 string error_msg;
582
583                 /* note that we temporarily truncated _id at the colon */
584
585                 if (!AudioFileSource::get_soundfile_info (path, finfo, error_msg)) {
586                         error << string_compose(_("Editor: cannot open file \"%1\", (%2)"), path, error_msg ) << endmsg;
587                         goto out;
588                 }
589
590                 if (check_sample_rate  && (finfo.samplerate != (int) _session->frame_rate())) {
591                         vector<string> choices;
592
593                         if (multifile) {
594                                 choices.push_back (_("Cancel entire import"));
595                                 choices.push_back (_("Don't embed it"));
596                                 choices.push_back (_("Embed all without questions"));
597
598                                 Gtkmm2ext::Choice rate_choice (
599                                         _("Sample rate"),
600                                         string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"),
601                                                         short_path (path, 40)),
602                                         choices, false
603                                         );
604
605                                 int resx = rate_choice.run ();
606
607                                 switch (resx) {
608                                 case 0: /* stop a multi-file import */
609                                         ret = -2;
610                                         goto out;
611                                 case 1: /* don't embed this one */
612                                         ret = -1;
613                                         goto out;
614                                 case 2: /* do it, and the rest without asking */
615                                         check_sample_rate = false;
616                                         break;
617                                 case 3: /* do it */
618                                         break;
619                                 default:
620                                         ret = -2;
621                                         goto out;
622                                 }
623                         } else {
624                                 choices.push_back (_("Cancel"));
625                                 choices.push_back (_("Embed it anyway"));
626
627                                 Gtkmm2ext::Choice rate_choice (
628                                         _("Sample rate"),
629                                         string_compose (_("%1\nThis audiofile's sample rate doesn't match the session sample rate!"), path),
630                                         choices, false
631                                         );
632
633                                 int resx = rate_choice.run ();
634
635                                 switch (resx) {
636                                 case 0: /* don't import */
637                                         ret = -1;
638                                         goto out;
639                                 case 1: /* do it */
640                                         break;
641                                 default:
642                                         ret = -2;
643                                         goto out;
644                                 }
645                         }
646                 }
647
648                 set_canvas_cursor (_cursors->wait);
649
650                 for (int n = 0; n < finfo.channels; ++n) {
651                         try {
652
653                                 /* check if we have this thing embedded already */
654
655                                 boost::shared_ptr<Source> s;
656
657                                 if ((s = _session->source_by_path_and_channel (path, n)) == 0) {
658
659                                         source = boost::dynamic_pointer_cast<AudioFileSource> (
660                                                 SourceFactory::createReadable (DataType::AUDIO, *_session,
661                                                                                path, n,
662                                                                                (mode == ImportAsTapeTrack
663                                                                                 ? Source::Destructive
664                                                                                 : Source::Flag (0)),
665                                                                         true, true));
666                                 } else {
667                                         source = boost::dynamic_pointer_cast<AudioFileSource> (s);
668                                 }
669
670                                 sources.push_back(source);
671                         }
672
673                         catch (failed_constructor& err) {
674                                 error << string_compose(_("could not open %1"), path) << endmsg;
675                                 goto out;
676                         }
677
678                         ARDOUR_UI::instance()->flush_pending ();
679                 }
680         }
681
682         if (sources.empty()) {
683                 goto out;
684         }
685
686         ret = add_sources (paths, sources, pos, mode, target_regions, target_tracks, track, true);
687
688   out:
689         set_canvas_cursor (current_canvas_cursor);
690         return ret;
691 }
692
693 int
694 Editor::add_sources (vector<string> paths, SourceList& sources, framepos_t& pos, ImportMode mode,
695                      int target_regions, int target_tracks, boost::shared_ptr<Track>& track, bool /*add_channel_suffix*/)
696 {
697         vector<boost::shared_ptr<Region> > regions;
698         string region_name;
699         uint32_t input_chan = 0;
700         uint32_t output_chan = 0;
701         bool use_timestamp;
702
703         use_timestamp = (pos == -1);
704
705         // kludge (for MIDI we're abusing "channel" for "track" here)
706         if (SMFSource::safe_midi_file_extension (paths.front())) {
707                 target_regions = -1;
708         }
709
710         if (target_regions == 1) {
711
712                 /* take all the sources we have and package them up as a region */
713
714                 region_name = region_name_from_path (paths.front(), (sources.size() > 1), false);
715
716                 /* we checked in import_sndfiles() that there were not too many */
717
718                 while (RegionFactory::region_by_name (region_name)) {
719                         region_name = bump_name_once (region_name, '.');
720                 }
721
722                 PropertyList plist; 
723                 
724                 plist.add (ARDOUR::Properties::start, 0);
725                 plist.add (ARDOUR::Properties::length, sources[0]->length (pos));
726                 plist.add (ARDOUR::Properties::name, region_name);
727                 plist.add (ARDOUR::Properties::layer, 0);
728                 plist.add (ARDOUR::Properties::whole_file, true);
729                 plist.add (ARDOUR::Properties::external, true);
730
731                 boost::shared_ptr<Region> r = RegionFactory::create (sources, plist);
732
733                 if (use_timestamp && boost::dynamic_pointer_cast<AudioRegion>(r)) {
734                         boost::dynamic_pointer_cast<AudioRegion>(r)->special_set_position(sources[0]->natural_position());
735                 }
736
737                 regions.push_back (r);
738
739
740         } else if (target_regions == -1 || target_regions > 1) {
741
742                 /* take each source and create a region for each one */
743
744                 SourceList just_one;
745                 SourceList::iterator x;
746                 uint32_t n;
747
748                 for (n = 0, x = sources.begin(); x != sources.end(); ++x, ++n) {
749
750                         just_one.clear ();
751                         just_one.push_back (*x);
752
753                         region_name = region_name_from_path ((*x)->path(), false, false, sources.size(), n);
754
755                         PropertyList plist; 
756                         
757                         plist.add (ARDOUR::Properties::start, 0);
758                         plist.add (ARDOUR::Properties::length, (*x)->length (pos));
759                         plist.add (ARDOUR::Properties::name, region_name);
760                         plist.add (ARDOUR::Properties::layer, 0);
761                         plist.add (ARDOUR::Properties::whole_file, true);
762                         plist.add (ARDOUR::Properties::external, true);
763
764                         boost::shared_ptr<Region> r = RegionFactory::create (just_one, plist);
765
766                         if (use_timestamp && boost::dynamic_pointer_cast<AudioRegion>(r)) {
767                                 boost::dynamic_pointer_cast<AudioRegion>(r)->special_set_position((*x)->natural_position());
768                         }
769
770                         regions.push_back (r);
771                 }
772         }
773
774         if (target_regions == 1) {
775                 input_chan = regions.front()->n_channels();
776         } else {
777                 if (target_tracks == 1) {
778                         input_chan = regions.size();
779                 } else {
780                         input_chan = 1;
781                 }
782         }
783
784         if (Config->get_output_auto_connect() & AutoConnectMaster) {
785                 output_chan = (_session->master_out() ? _session->master_out()->n_inputs().n_audio() : input_chan);
786         } else {
787                 output_chan = input_chan;
788         }
789
790         int n = 0;
791         framepos_t rlen = 0;
792
793         for (vector<boost::shared_ptr<Region> >::iterator r = regions.begin(); r != regions.end(); ++r, ++n) {                
794                 boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion> (*r);
795                 
796                 if (use_timestamp) {
797                         if (ar) {
798                         
799                                 /* get timestamp for this region */
800                                 
801                                 const boost::shared_ptr<Source> s (ar->sources().front());
802                                 const boost::shared_ptr<AudioSource> as = boost::dynamic_pointer_cast<AudioSource> (s);
803                                 
804                                 assert (as);
805                                 
806                                 if (as->natural_position() != 0) {
807                                         pos = as->natural_position();
808                                 } else if (target_tracks == 1) {
809                                         /* hmm, no timestamp available, put it after the previous region
810                                          */
811                                         if (n == 0) {
812                                                 pos = get_preferred_edit_position ();
813                                         } else {
814                                                 pos += rlen;
815                                         }
816                                 } else {
817                                         pos = get_preferred_edit_position ();
818                                 }
819                         } else {
820                                 /* should really get first position in MIDI file, but for now, use edit position*/
821                                 pos = get_preferred_edit_position ();
822                         }
823                 }
824                         
825
826                 finish_bringing_in_material (*r, input_chan, output_chan, pos, mode, track);
827
828                 rlen = (*r)->length();
829                 
830                 if (target_tracks != 1) {
831                         track.reset ();
832                 } else { 
833                         if (!use_timestamp || !ar) {
834                                 /* line each one up right after the other */
835                                 pos += (*r)->length();
836                         }
837                 }
838         }
839
840         /* setup peak file building in another thread */
841
842         for (SourceList::iterator x = sources.begin(); x != sources.end(); ++x) {
843                 SourceFactory::setup_peakfile (*x, true);
844         }
845
846         return 0;
847 }
848
849 int
850 Editor::finish_bringing_in_material (boost::shared_ptr<Region> region, uint32_t in_chans, uint32_t out_chans, framepos_t& pos,
851                                   ImportMode mode, boost::shared_ptr<Track>& existing_track)
852 {
853         boost::shared_ptr<AudioRegion> ar = boost::dynamic_pointer_cast<AudioRegion>(region);
854         boost::shared_ptr<MidiRegion> mr = boost::dynamic_pointer_cast<MidiRegion>(region);
855
856         switch (mode) {
857         case ImportAsRegion:
858                 /* relax, its been done */
859                 break;
860
861         case ImportToTrack:
862         {
863                 if (!existing_track) {
864
865                         if (ar) {
866                                 existing_track = get_nth_selected_audio_track (0);
867                         } else if (mr) {
868                                 existing_track = get_nth_selected_midi_track (0);
869                         }
870
871                         if (!existing_track) {
872                                 return -1;
873                         }
874                 }
875
876                 boost::shared_ptr<Playlist> playlist = existing_track->playlist();
877                 boost::shared_ptr<Region> copy (RegionFactory::create (region, region->properties()));
878                 begin_reversible_command (Operations::insert_file);
879                 playlist->clear_changes ();
880                 playlist->add_region (copy, pos);
881                 _session->add_command (new StatefulDiffCommand (playlist));
882                 commit_reversible_command ();
883                 break;
884         }
885
886         case ImportAsTrack:
887         {
888                 if (!existing_track) {
889                         if (ar) {
890                                 list<boost::shared_ptr<AudioTrack> > at (_session->new_audio_track (in_chans, out_chans, Normal, 0, 1));
891
892                                 if (at.empty()) {
893                                         return -1;
894                                 }
895
896                                 existing_track = at.front();
897                         } else if (mr) {
898                                 list<boost::shared_ptr<MidiTrack> > mt (_session->new_midi_track (Normal, 0, 1));
899
900                                 if (mt.empty()) {
901                                         return -1;
902                                 }
903
904                                 existing_track = mt.front();
905                         }
906                         
907                         existing_track->set_name (region->name());
908                 }
909
910                 boost::shared_ptr<Playlist> playlist = existing_track->playlist();
911                 boost::shared_ptr<Region> copy (RegionFactory::create (region));
912                 begin_reversible_command (Operations::insert_file);
913                 playlist->clear_changes ();
914                 playlist->add_region (copy, pos);
915                 _session->add_command (new StatefulDiffCommand (playlist));
916                 commit_reversible_command ();
917                 break;
918         }
919
920         case ImportAsTapeTrack:
921         {
922                 if (!ar) {
923                         return -1;
924                 }
925
926                 list<boost::shared_ptr<AudioTrack> > at (_session->new_audio_track (in_chans, out_chans, Destructive));
927                 if (!at.empty()) {
928                         boost::shared_ptr<Playlist> playlist = at.front()->playlist();
929                         boost::shared_ptr<Region> copy (RegionFactory::create (region));
930                         begin_reversible_command (Operations::insert_file);
931                         playlist->clear_changes ();
932                         playlist->add_region (copy, pos);
933                         _session->add_command (new StatefulDiffCommand (playlist));
934                         commit_reversible_command ();
935                 }
936                 break;
937         }
938         }
939
940         return 0;
941 }
942
943 void *
944 Editor::_import_thread (void *arg)
945 {
946         SessionEvent::create_per_thread_pool ("import events", 64);
947
948         Editor *ed = (Editor *) arg;
949         return ed->import_thread ();
950 }
951
952 void *
953 Editor::import_thread ()
954 {
955         _session->import_audiofiles (import_status);
956         pthread_exit_pbd (0);
957         /*NOTREACHED*/
958         return 0;
959 }