2 Copyright (C) 1999-2003 Paul Davis
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.
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.
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.
21 #include "libardour-config.h"
29 #include "pbd/error.h"
30 #include "pbd/enumwriter.h"
31 #include "pbd/pthread_utils.h"
32 #include "pbd/memento_command.h"
33 #include "pbd/stacktrace.h"
35 #include "midi++/mmc.h"
36 #include "midi++/port.h"
38 #include "ardour/audioengine.h"
39 #include "ardour/auditioner.h"
40 #include "ardour/automation_watch.h"
41 #include "ardour/butler.h"
42 #include "ardour/click.h"
43 #include "ardour/debug.h"
44 #include "ardour/disk_reader.h"
45 #include "ardour/location.h"
46 #include "ardour/playlist.h"
47 #include "ardour/profile.h"
48 #include "ardour/scene_changer.h"
49 #include "ardour/session.h"
50 #include "ardour/transport_master.h"
51 #include "ardour/transport_master_manager.h"
52 #include "ardour/tempo.h"
53 #include "ardour/operations.h"
54 #include "ardour/vca.h"
55 #include "ardour/vca_manager.h"
60 using namespace ARDOUR;
64 Session::add_post_transport_work (PostTransportWork ptw)
66 PostTransportWork oldval;
67 PostTransportWork newval;
71 oldval = (PostTransportWork) g_atomic_int_get (&_post_transport_work);
72 newval = PostTransportWork (oldval | ptw);
73 if (g_atomic_int_compare_and_exchange (&_post_transport_work, oldval, newval)) {
79 error << "Could not set post transport work! Crazy thread madness, call the programmers" << endmsg;
83 Session::should_ignore_transport_request (TransportRequestSource src, TransportRequestType type) const
85 if (config.get_external_sync()) {
86 if (TransportMasterManager::instance().current()->allow_request (src, type)) {
96 Session::request_sync_source (boost::shared_ptr<TransportMaster> tm)
98 SessionEvent* ev = new SessionEvent (SessionEvent::SetTransportMaster, SessionEvent::Add, SessionEvent::Immediate, 0, 0.0);
99 ev->transport_master = tm;
100 DEBUG_TRACE (DEBUG::Slave, "sent request for new transport master\n");
105 Session::request_transport_speed (double speed, bool as_default, TransportRequestSource origin)
107 if (should_ignore_transport_request (origin, TR_Speed)) {
110 SessionEvent* ev = new SessionEvent (SessionEvent::SetTransportSpeed, SessionEvent::Add, SessionEvent::Immediate, 0, speed);
111 ev->third_yes_or_no = as_default; // as_default
112 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request transport speed = %1 as default = %2\n", speed, as_default));
116 /** Request a new transport speed, but if the speed parameter is exactly zero then use
117 * a very small +ve value to prevent the transport actually stopping. This method should
118 * be used by callers who are varying transport speed but don't ever want to stop it.
121 Session::request_transport_speed_nonzero (double speed, bool as_default, TransportRequestSource origin)
123 if (should_ignore_transport_request (origin, TransportRequestType (TR_Speed|TR_Start))) {
131 request_transport_speed (speed, as_default);
135 Session::request_stop (bool abort, bool clear_state, TransportRequestSource origin)
137 if (should_ignore_transport_request (origin, TR_Stop)) {
141 SessionEvent* ev = new SessionEvent (SessionEvent::SetTransportSpeed, SessionEvent::Add, SessionEvent::Immediate, audible_sample(), 0.0, abort, clear_state);
142 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request transport stop, audible %3 transport %4 abort = %1, clear state = %2\n", abort, clear_state, audible_sample(), _transport_sample));
147 Session::request_locate (samplepos_t target_sample, bool with_roll, TransportRequestSource origin)
149 if (should_ignore_transport_request (origin, TR_Locate)) {
153 SessionEvent *ev = new SessionEvent (with_roll ? SessionEvent::LocateRoll : SessionEvent::Locate, SessionEvent::Add, SessionEvent::Immediate, target_sample, 0, false);
154 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request locate to %1\n", target_sample));
159 Session::force_locate (samplepos_t target_sample, bool with_roll)
161 SessionEvent *ev = new SessionEvent (with_roll ? SessionEvent::LocateRoll : SessionEvent::Locate, SessionEvent::Add, SessionEvent::Immediate, target_sample, 0, true);
162 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request forced locate to %1\n", target_sample));
167 Session::unset_preroll_record_trim ()
169 _preroll_record_trim_len = 0;
173 Session::request_preroll_record_trim (samplepos_t rec_in, samplecnt_t preroll)
175 if (actively_recording ()) {
178 unset_preroll_record_trim ();
180 config.set_punch_in (false);
181 config.set_punch_out (false);
183 samplepos_t pos = std::max ((samplepos_t)0, rec_in - preroll);
184 _preroll_record_trim_len = preroll;
185 maybe_enable_record ();
186 request_locate (pos, true);
187 set_requested_return_sample (rec_in);
191 Session::request_count_in_record ()
193 if (actively_recording ()) {
196 if (transport_rolling()) {
199 maybe_enable_record ();
200 _count_in_once = true;
201 request_transport_speed (1.0, true);
205 Session::request_play_loop (bool yn, bool change_transport_roll)
207 if (transport_master_is_external() && yn) {
208 // don't attempt to loop when not using Internal Transport
209 // see also gtk2_ardour/ardour_ui_options.cc parameter_changed()
214 Location *location = _locations->auto_loop_location();
217 if (location == 0 && yn) {
218 error << _("Cannot loop - no loop range defined")
223 if (change_transport_roll) {
224 if (transport_rolling()) {
225 /* start looping at current speed */
226 target_speed = transport_speed ();
228 /* currently stopped */
230 /* start looping at normal speed */
237 /* leave the speed alone */
238 target_speed = transport_speed ();
241 ev = new SessionEvent (SessionEvent::SetLoop, SessionEvent::Add, SessionEvent::Immediate, 0, target_speed, yn);
242 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request set loop = %1, change roll state ? %2\n", yn, change_transport_roll));
246 if (!change_transport_roll) {
247 if (!transport_rolling()) {
248 /* we're not changing transport state, but we do want
249 to set up position for the new loop. Don't
250 do this if we're rolling already.
252 request_locate (location->start(), false);
256 if (!change_transport_roll && Config->get_seamless_loop() && transport_rolling()) {
257 // request an immediate locate to refresh the tracks
258 // after disabling looping
259 request_locate (_transport_sample-1, false);
265 Session::request_play_range (list<AudioRange>* range, bool leave_rolling)
267 SessionEvent* ev = new SessionEvent (SessionEvent::SetPlayAudioRange, SessionEvent::Add, SessionEvent::Immediate, 0, (leave_rolling ? 1.0 : 0.0));
269 ev->audio_range = *range;
271 ev->audio_range.clear ();
273 DEBUG_TRACE (DEBUG::Transport, string_compose ("Request play range, leave rolling ? %1\n", leave_rolling));
278 Session::request_cancel_play_range ()
280 SessionEvent* ev = new SessionEvent (SessionEvent::CancelPlayAudioRange, SessionEvent::Add, SessionEvent::Immediate, 0, 0);
286 Session::solo_selection_active ()
288 if ( _soloSelection.empty() ) {
295 Session::solo_selection ( StripableList &list, bool new_state )
297 boost::shared_ptr<ControlList> solo_list (new ControlList);
298 boost::shared_ptr<ControlList> unsolo_list (new ControlList);
301 _soloSelection = list;
303 _soloSelection.clear();
305 boost::shared_ptr<RouteList> rl = get_routes();
307 for (ARDOUR::RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
309 if ( !(*i)->is_track() ) {
313 boost::shared_ptr<Stripable> s (*i);
315 bool found = (std::find(list.begin(), list.end(), s) != list.end());
316 if ( new_state && found ) {
318 solo_list->push_back (s->solo_control());
320 //must invalidate playlists on selected tracks, so only selected regions get heard
321 boost::shared_ptr<Track> track = boost::dynamic_pointer_cast<Track> (*i);
323 boost::shared_ptr<Playlist> playlist = track->playlist();
325 playlist->ContentsChanged();
329 unsolo_list->push_back (s->solo_control());
333 set_controls (solo_list, 1.0, Controllable::NoGroup);
334 set_controls (unsolo_list, 0.0, Controllable::NoGroup);
338 Session::realtime_stop (bool abort, bool clear_state)
340 DEBUG_TRACE (DEBUG::Transport, string_compose ("realtime stop @ %1\n", _transport_sample));
341 PostTransportWork todo = PostTransportWork (0);
343 /* assume that when we start, we'll be moving forwards */
345 if (_transport_speed < 0.0f) {
346 todo = (PostTransportWork (todo | PostTransportStop | PostTransportReverse));
347 _default_transport_speed = 1.0;
349 todo = PostTransportWork (todo | PostTransportStop);
354 boost::shared_ptr<RouteList> r = routes.reader ();
356 for (RouteList::iterator i = r->begin (); i != r->end(); ++i) {
357 (*i)->realtime_handle_transport_stopped ();
360 DEBUG_TRACE (DEBUG::Transport, string_compose ("stop complete, auto-return scheduled for return to %1\n", _requested_return_sample));
362 /* the duration change is not guaranteed to have happened, but is likely */
364 todo = PostTransportWork (todo | PostTransportDuration);
367 todo = PostTransportWork (todo | PostTransportAbort);
371 todo = PostTransportWork (todo | PostTransportClearSubstate);
375 add_post_transport_work (todo);
378 _clear_event_type (SessionEvent::StopOnce);
379 _clear_event_type (SessionEvent::RangeStop);
380 _clear_event_type (SessionEvent::RangeLocate);
382 //clear our solo-selection, if there is one
383 if ( solo_selection_active() ) {
384 solo_selection ( _soloSelection, false );
387 /* if we're going to clear loop state, then force disabling record BUT only if we're not doing latched rec-enable */
388 disable_record (true, (!Config->get_latched_record_enable() && clear_state));
390 if (clear_state && !Config->get_loop_is_mode()) {
394 reset_slave_state ();
396 _transport_speed = 0;
397 _target_transport_speed = 0;
400 g_atomic_int_set (&_playback_load, 100);
401 g_atomic_int_set (&_capture_load, 100);
403 if (config.get_use_video_sync()) {
404 waiting_for_sync_offset = true;
407 transport_sub_state = 0;
411 Session::realtime_locate ()
413 boost::shared_ptr<RouteList> r = routes.reader ();
414 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
415 (*i)->realtime_locate ();
420 Session::butler_transport_work ()
422 /* Note: this function executes in the butler thread context */
426 PostTransportWork ptw;
427 boost::shared_ptr<RouteList> r = routes.reader ();
430 int on_entry = g_atomic_int_get (&_butler->should_do_transport_work);
432 ptw = post_transport_work();
434 DEBUG_TRACE (DEBUG::Transport, string_compose ("Butler transport work, todo = %1 at %2\n", enum_2_string (ptw), (before = g_get_monotonic_time())));
437 if (ptw & PostTransportLocate) {
439 if (get_play_loop() && !Config->get_seamless_loop()) {
441 DEBUG_TRACE (DEBUG::Butler, "flush loop recording fragment to disk\n");
443 /* this locate might be happening while we are
446 * Non-seamless looping will require a locate (below) that
447 * will reset capture buffers and throw away data.
449 * Rather than first find all tracks and see if they
450 * have outstanding data, just do a flush anyway. It
451 * may be cheaper this way anyway, and is certainly
455 bool more_disk_io_to_do = false;
459 more_disk_io_to_do = _butler->flush_tracks_to_disk_after_locate (r, errors);
465 if (more_disk_io_to_do) {
474 if (ptw & PostTransportAdjustPlaybackBuffering) {
475 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
476 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
478 tr->adjust_playback_buffering ();
479 /* and refill those buffers ... */
481 (*i)->non_realtime_locate (_transport_sample);
483 VCAList v = _vca_manager->vcas ();
484 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
485 (*i)->non_realtime_locate (_transport_sample);
489 if (ptw & PostTransportAdjustCaptureBuffering) {
490 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
491 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
493 tr->adjust_capture_buffering ();
498 if (ptw & PostTransportCurveRealloc) {
499 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
500 (*i)->curve_reallocate();
504 if (ptw & PostTransportReverse) {
507 cumulative_rf_motion = 0;
510 /* don't seek if locate will take care of that in non_realtime_stop() */
512 if (!(ptw & PostTransportLocate)) {
513 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
514 (*i)->non_realtime_locate (_transport_sample);
516 if (on_entry != g_atomic_int_get (&_butler->should_do_transport_work)) {
517 /* new request, stop seeking, and start again */
518 g_atomic_int_dec_and_test (&_butler->should_do_transport_work);
522 VCAList v = _vca_manager->vcas ();
523 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
524 (*i)->non_realtime_locate (_transport_sample);
529 if (ptw & PostTransportLocate) {
530 DEBUG_TRACE (DEBUG::Transport, "nonrealtime locate invoked from BTW\n");
531 non_realtime_locate ();
534 if (ptw & PostTransportStop) {
535 non_realtime_stop (ptw & PostTransportAbort, on_entry, finished);
537 g_atomic_int_dec_and_test (&_butler->should_do_transport_work);
542 if (ptw & PostTransportOverWrite) {
543 non_realtime_overwrite (on_entry, finished);
545 g_atomic_int_dec_and_test (&_butler->should_do_transport_work);
550 if (ptw & PostTransportAudition) {
551 non_realtime_set_audition ();
554 g_atomic_int_dec_and_test (&_butler->should_do_transport_work);
556 DEBUG_TRACE (DEBUG::Transport, string_compose (X_("Butler transport work all done after %1 usecs @ %2 trw = %3\n"), g_get_monotonic_time() - before, _transport_sample, _butler->transport_work_requested()));
560 Session::non_realtime_overwrite (int on_entry, bool& finished)
562 boost::shared_ptr<RouteList> rl = routes.reader();
563 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
564 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
565 if (tr && tr->pending_overwrite ()) {
566 tr->overwrite_existing_buffers ();
568 if (on_entry != g_atomic_int_get (&_butler->should_do_transport_work)) {
577 Session::non_realtime_locate ()
579 DEBUG_TRACE (DEBUG::Transport, string_compose ("locate tracks to %1\n", _transport_sample));
581 if (Config->get_loop_is_mode() && get_play_loop()) {
583 Location *loc = _locations->auto_loop_location();
585 if (!loc || (_transport_sample < loc->start() || _transport_sample >= loc->end())) {
586 /* jumped out of loop range: stop tracks from looping,
587 but leave loop (mode) enabled.
589 set_track_loop (false);
591 } else if (loc && Config->get_seamless_loop() &&
592 ((loc->start() <= _transport_sample) ||
593 (loc->end() > _transport_sample) ) ) {
595 /* jumping to start of loop. This might have been done before but it is
596 * idempotent and cheap. Doing it here ensures that when we start playback
597 * outside the loop we still flip tracks into the magic seamless mode
600 set_track_loop (true);
603 set_track_loop (false);
608 /* no more looping .. should have been noticed elsewhere */
615 boost::shared_ptr<RouteList> rl = routes.reader();
618 gint sc = g_atomic_int_get (&_seek_counter);
619 tf = _transport_sample;
621 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
622 (*i)->non_realtime_locate (tf);
623 if (sc != g_atomic_int_get (&_seek_counter)) {
630 /* VCAs are quick to locate because they have no data (except
631 automation) associated with them. Don't bother with a
632 restart mechanism here, but do use the same transport sample
633 that the Routes used.
635 VCAList v = _vca_manager->vcas ();
636 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
637 (*i)->non_realtime_locate (tf);
641 _scene_changer->locate (_transport_sample);
643 /* XXX: it would be nice to generate the new clicks here (in the non-RT thread)
644 rather than clearing them so that the RT thread has to spend time constructing
645 them (in Session::click).
650 #ifdef USE_TRACKS_CODE_FEATURES
652 Session::select_playhead_priority_target (samplepos_t& jump_to)
656 AutoReturnTarget autoreturn = Config->get_auto_return_target_list ();
662 if (Profile->get_trx() && transport_rolling() ) {
663 // We're playing, so do nothing.
664 // Next stop will put us where we need to be.
668 /* Note that the order of checking each AutoReturnTarget flag defines
669 the priority each flag.
671 Ardour/Mixbus: Last Locate
676 Tracks: Range Selection
682 if (autoreturn & RangeSelectionStart) {
683 if (!_range_selection.empty()) {
684 jump_to = _range_selection.from;
686 if (transport_rolling ()) {
687 /* Range selection no longer exists, but we're playing,
688 so do nothing. Next stop will put us where
696 if (jump_to < 0 && (autoreturn & Loop) && get_play_loop()) {
697 /* don't try to handle loop play when synced to JACK */
699 if (!synced_to_engine()) {
700 Location *location = _locations->auto_loop_location();
703 jump_to = location->start();
705 if (Config->get_seamless_loop()) {
706 /* need to get track buffers reloaded */
707 set_track_loop (true);
713 if (jump_to < 0 && (autoreturn & RegionSelectionStart)) {
714 if (!_object_selection.empty()) {
715 jump_to = _object_selection.from;
719 if (jump_to < 0 && (autoreturn & LastLocate)) {
720 jump_to = _last_roll_location;
728 Session::select_playhead_priority_target (samplepos_t& jump_to)
730 if (config.get_external_sync() || !config.get_auto_return()) {
734 jump_to = _last_roll_location;
741 Session::follow_playhead_priority ()
745 if (select_playhead_priority_target (target)) {
746 request_locate (target);
751 Session::non_realtime_stop (bool abort, int on_entry, bool& finished)
757 PostTransportWork ptw = post_transport_work();
762 boost::shared_ptr<RouteList> rl = routes.reader();
763 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
764 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
765 if (tr && tr->get_captured_samples () != 0) {
771 /* stop and locate are merged here because they share a lot of common stuff */
774 now = localtime (&xnow);
777 auditioner->cancel_audition ();
780 cumulative_rf_motion = 0;
784 begin_reversible_command (Operations::capture);
785 _have_captured = true;
788 DEBUG_TRACE (DEBUG::Transport, X_("Butler PTW: DS stop\n"));
790 if (abort && did_record) {
791 /* no reason to save the session file when we remove sources
793 _state_of_the_state = StateOfTheState (_state_of_the_state|InCleanup);
796 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
797 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
799 tr->transport_stopped_wallclock (*now, xnow, abort);
803 if (abort && did_record) {
804 _state_of_the_state = StateOfTheState (_state_of_the_state & ~InCleanup);
807 boost::shared_ptr<RouteList> r = routes.reader ();
810 commit_reversible_command ();
811 /* increase take name */
812 if (config.get_track_name_take () && !config.get_take_name ().empty()) {
813 string newname = config.get_take_name();
814 config.set_take_name(bump_name_number (newname));
818 if (_engine.running()) {
819 PostTransportWork ptw = post_transport_work ();
821 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
822 (*i)->non_realtime_transport_stop (_transport_sample, !(ptw & PostTransportLocate));
824 VCAList v = _vca_manager->vcas ();
825 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
826 (*i)->non_realtime_transport_stop (_transport_sample, !(ptw & PostTransportLocate));
829 update_latency_compensation ();
832 bool const auto_return_enabled = (!config.get_external_sync() && (Config->get_auto_return_target_list() || abort));
834 if (auto_return_enabled ||
835 (ptw & PostTransportLocate) ||
836 (_requested_return_sample >= 0) ||
837 synced_to_engine()) {
839 // rg: what is the logic behind this case?
840 // _requested_return_sample should be ignored when synced_to_engine/slaved.
841 // currently worked around in MTC_Slave by forcing _requested_return_sample to -1
843 if ((auto_return_enabled || synced_to_engine() || _requested_return_sample >= 0) &&
844 !(ptw & PostTransportLocate)) {
846 /* no explicit locate queued */
848 bool do_locate = false;
850 if (_requested_return_sample >= 0) {
852 /* explicit return request pre-queued in event list. overrides everything else */
854 _transport_sample = _requested_return_sample;
860 if (select_playhead_priority_target (jump_to)) {
862 _transport_sample = jump_to;
867 _transport_sample = _last_roll_location;
872 _requested_return_sample = -1;
875 _engine.transport_locate (_transport_sample);
882 unset_preroll_record_trim ();
884 /* do this before seeking, because otherwise the tracks will do the wrong thing in seamless loop mode.
887 if (ptw & PostTransportClearSubstate) {
889 if (!Config->get_loop_is_mode()) {
894 /* this for() block can be put inside the previous if() and has the effect of ... ??? what */
897 DEBUG_TRACE (DEBUG::Transport, X_("Butler PTW: locate\n"));
898 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
899 DEBUG_TRACE (DEBUG::Transport, string_compose ("Butler PTW: locate on %1\n", (*i)->name()));
900 (*i)->non_realtime_locate (_transport_sample);
902 if (on_entry != g_atomic_int_get (&_butler->should_do_transport_work)) {
904 /* we will be back */
911 VCAList v = _vca_manager->vcas ();
912 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
913 (*i)->non_realtime_locate (_transport_sample);
919 /* don't bother with this stuff if we're disconnected from the engine,
920 because there will be no process callbacks to deliver stuff from
923 if (_engine.connected() && !_engine.freewheeling()) {
924 // need to queue this in the next RT cycle
925 _send_timecode_update = true;
927 if (transport_master()->type() == MTC) {
928 send_immediate_mmc (MIDI::MachineControlCommand (MIDI::MachineControl::cmdStop));
930 /* This (::non_realtime_stop()) gets called by main
931 process thread, which will lead to confusion
932 when calling AsyncMIDIPort::write().
934 Something must be done. XXX
936 send_mmc_locate (_transport_sample);
940 if ((ptw & PostTransportLocate) && get_record_enabled()) {
941 /* This is scheduled by realtime_stop(), which is also done
942 * when a slave requests /locate/ for an initial sync.
943 * We can't hold up the slave for long with a save() here,
944 * without breaking its initial sync cycle.
946 * save state only if there's no slave or if it's not yet locked.
948 if (!transport_master_is_external() || !transport_master()->locked()) {
949 DEBUG_TRACE (DEBUG::Transport, X_("Butler PTW: requests save\n"));
950 SaveSessionRequested (_current_snapshot_name);
955 /* always try to get rid of this */
957 remove_pending_capture_state ();
959 /* save the current state of things if appropriate */
961 if (did_record && !saved) {
962 SaveSessionRequested (_current_snapshot_name);
965 if (ptw & PostTransportStop) {
967 if (!Config->get_loop_is_mode()) {
972 PositionChanged (_transport_sample); /* EMIT SIGNAL */
973 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC with speed = %1\n", _transport_speed));
974 TransportStateChange (); /* EMIT SIGNAL */
975 AutomationWatch::instance().transport_stop_automation_watches (_transport_sample);
977 /* and start it up again if relevant */
979 if ((ptw & PostTransportLocate) && !config.get_external_sync()) {
980 request_transport_speed (1.0);
985 Session::unset_play_loop ()
989 clear_events (SessionEvent::AutoLoop);
990 set_track_loop (false);
993 if (Config->get_seamless_loop()) {
994 /* likely need to flush track buffers: this will locate us to wherever we are */
995 add_post_transport_work (PostTransportLocate);
996 _butler->schedule_transport_work ();
1002 Session::set_track_loop (bool yn)
1004 Location* loc = _locations->auto_loop_location ();
1010 boost::shared_ptr<RouteList> rl = routes.reader ();
1012 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
1013 if (*i && !(*i)->is_private_route()) {
1014 (*i)->set_loop (yn ? loc : 0);
1020 Session::set_play_loop (bool yn, double speed)
1022 /* Called from event-handling context */
1026 if (yn == play_loop || (actively_recording() && yn) || (loc = _locations->auto_loop_location()) == 0) {
1027 /* nothing to do, or can't change loop status while recording */
1031 if (yn && Config->get_seamless_loop() && synced_to_engine()) {
1032 warning << string_compose (
1033 _("Seamless looping cannot be supported while %1 is using JACK transport.\n"
1034 "Recommend changing the configured options"), PROGRAM_NAME)
1042 have_looped = false;
1046 unset_play_range ();
1048 if (Config->get_seamless_loop()) {
1049 if (!Config->get_loop_is_mode()) {
1050 /* set all tracks to use internal looping */
1051 set_track_loop (true);
1053 /* we will do this in the locate to the start OR when we hit the end
1054 * of the loop for the first time
1058 /* set all tracks to NOT use internal looping */
1059 set_track_loop (false);
1062 /* Put the delick and loop events in into the event list. The declick event will
1063 cause a de-clicking fade-out just before the end of the loop, and it will also result
1064 in a fade-in when the loop restarts. The AutoLoop event will peform the actual loop.
1069 auto_loop_declick_range (loc, dcp, dcl);
1070 merge_event (new SessionEvent (SessionEvent::AutoLoop, SessionEvent::Replace, loc->end(), loc->start(), 0.0f));
1072 /* if requested to roll, locate to start of loop and
1073 * roll but ONLY if we're not already rolling.
1075 args: positition, roll=true, flush=true, with_loop=false, force buffer refill if seamless looping
1078 if (Config->get_loop_is_mode()) {
1079 /* loop IS a transport mode: if already
1080 rolling, do not locate to loop start.
1082 if (!transport_rolling() && (speed != 0.0)) {
1083 start_locate (loc->start(), true, true, false, true);
1087 start_locate (loc->start(), true, true, false, true);
1097 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC2 with speed = %1\n", _transport_speed));
1098 TransportStateChange ();
1101 Session::flush_all_inserts ()
1103 boost::shared_ptr<RouteList> r = routes.reader ();
1105 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
1106 (*i)->flush_processors ();
1111 Session::start_locate (samplepos_t target_sample, bool with_roll, bool with_flush, bool for_loop_enabled, bool force)
1113 if (target_sample < 0) {
1114 error << _("Locate called for negative sample position - ignored") << endmsg;
1118 if (synced_to_engine()) {
1123 transport_master()->speed_and_position (sp, pos, 0);
1125 if (target_sample != pos) {
1127 if (config.get_jack_time_master()) {
1128 /* actually locate now, since otherwise jack_timebase_callback
1129 will use the incorrect _transport_sample and report an old
1130 and incorrect time to Jack transport
1132 locate (target_sample, with_roll, with_flush, for_loop_enabled, force);
1135 /* tell JACK to change transport position, and we will
1136 follow along later in ::follow_slave()
1139 _engine.transport_locate (target_sample);
1141 if (sp != 1.0f && with_roll) {
1142 _engine.transport_start ();
1148 locate (target_sample, with_roll, with_flush, for_loop_enabled, force);
1153 Session::worst_latency_preroll () const
1155 return _worst_output_latency + _worst_input_latency;
1159 Session::micro_locate (samplecnt_t distance)
1161 boost::shared_ptr<RouteList> rl = routes.reader();
1162 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
1163 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
1164 if (tr && !tr->can_internal_playback_seek (distance)) {
1169 DEBUG_TRACE (DEBUG::Transport, string_compose ("micro-locate by %1\n", distance));
1171 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
1172 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
1174 tr->internal_playback_seek (distance);
1178 _transport_sample += distance;
1182 /** @param with_mmc true to send a MMC locate command when the locate is done */
1184 Session::locate (samplepos_t target_sample, bool with_roll, bool with_flush, bool for_loop_enabled, bool force, bool with_mmc)
1186 bool need_butler = false;
1188 /* Locates for seamless looping are fairly different from other
1189 * locates. They assume that the diskstream buffers for each track
1190 * already have the correct data in them, and thus there is no need to
1191 * actually tell the tracks to locate. What does need to be done,
1192 * though, is all the housekeeping that is associated with non-linear
1193 * changes in the value of _transport_sample.
1196 DEBUG_TRACE (DEBUG::Transport, string_compose ("rt-locate to %1, roll %2 flush %3 loop-enabled %4 force %5 mmc %6\n",
1197 target_sample, with_roll, with_flush, for_loop_enabled, force, with_mmc));
1199 if (!force && _transport_sample == target_sample && !loop_changing && !for_loop_enabled) {
1201 /* already at the desired position. Not forced to locate,
1202 the loop isn't changing, so unless we're told to
1203 start rolling also, there's nothing to do but
1204 tell the world where we are (again).
1208 set_transport_speed (1.0, 0, false);
1210 loop_changing = false;
1211 Located (); /* EMIT SIGNAL */
1215 cerr << "... now doing the actual locate\n";
1217 // Update Timecode time
1218 _transport_sample = target_sample;
1219 // Bump seek counter so that any in-process locate in the butler
1220 // thread(s?) can restart.
1221 g_atomic_int_inc (&_seek_counter);
1222 _last_roll_or_reversal_location = target_sample;
1223 _remaining_latency_preroll = worst_latency_preroll ();
1224 timecode_time(_transport_sample, transmitting_timecode_time); // XXX here?
1226 /* do "stopped" stuff if:
1228 * we are rolling AND
1229 * no autoplay in effect AND
1230 * we're not going to keep rolling after the locate AND
1231 * !(playing a loop with JACK sync)
1235 bool transport_was_stopped = !transport_rolling();
1237 if (!transport_was_stopped && (!auto_play_legal || !config.get_auto_play()) && !with_roll && !(synced_to_engine() && play_loop) &&
1238 (!Profile->get_trx() || !(config.get_external_sync() && !synced_to_engine()))) {
1239 realtime_stop (false, true); // XXX paul - check if the 2nd arg is really correct
1240 transport_was_stopped = true;
1242 /* otherwise tell the world that we located */
1246 if (force || !for_loop_enabled || loop_changing) {
1248 PostTransportWork todo = PostTransportLocate;
1250 if (with_roll && transport_was_stopped) {
1251 todo = PostTransportWork (todo | PostTransportRoll);
1254 add_post_transport_work (todo);
1259 /* this is functionally what clear_clicks() does but with a tentative lock */
1261 Glib::Threads::RWLock::WriterLock clickm (click_lock, Glib::Threads::TRY_LOCK);
1263 if (clickm.locked()) {
1265 for (Clicks::iterator i = clicks.begin(); i != clicks.end(); ++i) {
1274 /* switch from input if we're going to roll */
1275 if (Config->get_monitoring_model() == HardwareMonitoring) {
1276 set_track_monitor_input_status (!config.get_auto_input());
1279 /* otherwise we're going to stop, so do the opposite */
1280 if (Config->get_monitoring_model() == HardwareMonitoring) {
1281 set_track_monitor_input_status (true);
1285 /* cancel looped playback if transport pos outside of loop range */
1288 Location* al = _locations->auto_loop_location();
1291 if (_transport_sample < al->start() || _transport_sample >= al->end()) {
1293 // located outside the loop: cancel looping directly, this is called from event handling context
1295 have_looped = false;
1297 if (!Config->get_loop_is_mode()) {
1298 set_play_loop (false, _transport_speed);
1300 if (Config->get_seamless_loop()) {
1301 /* this will make the non_realtime_locate() in the butler
1302 which then causes seek() in tracks actually do the right
1305 set_track_loop (false);
1309 } else if (_transport_sample == al->start()) {
1311 // located to start of loop - this is looping, basically
1315 if (_last_roll_location != al->start()) {
1316 /* didn't start at loop start - playback must have
1317 * started before loop since we've now hit the loop
1320 add_post_transport_work (PostTransportLocate);
1326 boost::shared_ptr<RouteList> rl = routes.reader();
1328 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
1329 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
1331 if (tr && tr->rec_enable_control()->get_value()) {
1332 // tell it we've looped, so it can deal with the record state
1333 tr->transport_looped (_transport_sample);
1338 TransportLooped(); // EMIT SIGNAL
1344 _butler->schedule_transport_work ();
1347 loop_changing = false;
1349 _send_timecode_update = true;
1352 send_mmc_locate (_transport_sample);
1355 _last_roll_location = _last_roll_or_reversal_location = _transport_sample;
1356 if (!synced_to_engine () || _transport_sample == _engine.transport_sample ()) {
1357 Located (); /* EMIT SIGNAL */
1361 /** Set the transport speed.
1362 * Called from the process thread.
1363 * @param speed New speed
1366 Session::set_transport_speed (double speed, samplepos_t destination_sample, bool abort, bool clear_state, bool as_default)
1368 DEBUG_TRACE (DEBUG::Transport, string_compose ("@ %5 Set transport speed to %1, abort = %2 clear_state = %3, current = %4 as_default %6\n",
1369 speed, abort, clear_state, _transport_speed, _transport_sample, as_default));
1371 /* max speed is somewhat arbitrary but based on guestimates regarding disk i/o capability
1372 and user needs. We really need CD-style "skip" playback for ffwd and rewind.
1376 speed = min (8.0, speed);
1377 } else if (speed < 0) {
1378 speed = max (-8.0, speed);
1381 double new_engine_speed = 1.0;
1383 new_engine_speed = fabs (speed);
1384 if (speed < 0) speed = -1;
1385 if (speed > 0) speed = 1;
1388 if (_transport_speed == speed && new_engine_speed == _engine_speed) {
1389 if (as_default && speed == 0.0) { // => reset default transport speed. hacky or what?
1390 _default_transport_speed = 1.0;
1395 #if 0 // TODO pref: allow vari-speed recording
1396 if (actively_recording() && speed != 1.0 && speed != 0.0) {
1397 /* no varispeed during recording */
1398 DEBUG_TRACE (DEBUG::Transport, string_compose ("No varispeed during recording cur_speed %1, sample %2\n",
1399 _transport_speed, _transport_sample));
1404 _target_transport_speed = fabs(speed);
1405 _engine_speed = new_engine_speed;
1407 if (transport_rolling() && speed == 0.0) {
1409 /* we are rolling and we want to stop */
1411 if (Config->get_monitoring_model() == HardwareMonitoring) {
1412 set_track_monitor_input_status (true);
1415 if (synced_to_engine ()) {
1417 /* do this here because our response to the slave won't
1420 _play_range = false;
1421 _count_in_once = false;
1424 _engine.transport_stop ();
1426 bool const auto_return_enabled = (!config.get_external_sync() && (Config->get_auto_return_target_list() || abort));
1428 if (!auto_return_enabled) {
1429 _requested_return_sample = destination_sample;
1432 stop_transport (abort);
1435 } else if (transport_stopped() && speed == 1.0) {
1437 _default_transport_speed = speed;
1439 /* we are stopped and we want to start rolling at speed 1 */
1441 if (Config->get_loop_is_mode() && play_loop) {
1443 Location *location = _locations->auto_loop_location();
1445 if (location != 0) {
1446 if (_transport_sample != location->start()) {
1448 if (Config->get_seamless_loop()) {
1449 /* force tracks to do their thing */
1450 set_track_loop (true);
1453 /* jump to start and then roll from there */
1455 request_locate (location->start(), true);
1461 if (Config->get_monitoring_model() == HardwareMonitoring && config.get_auto_input()) {
1462 set_track_monitor_input_status (false);
1465 if (synced_to_engine()) {
1466 _engine.transport_start ();
1467 _count_in_once = false;
1474 /* not zero, not 1.0 ... varispeed */
1476 // TODO handled transport start.. _remaining_latency_preroll
1477 // and reversal of playback direction.
1479 if ((synced_to_engine()) && speed != 0.0 && speed != 1.0) {
1480 warning << string_compose (
1481 _("Global varispeed cannot be supported while %1 is connected to JACK transport control"),
1488 if (actively_recording()) {
1493 if (speed > 0.0 && _transport_sample == current_end_sample()) {
1497 if (speed < 0.0 && _transport_sample == 0) {
1503 /* if we are reversing relative to the current speed, or relative to the speed
1504 before the last stop, then we have to do extra work.
1507 PostTransportWork todo = PostTransportWork (0);
1509 if ((_transport_speed && speed * _transport_speed < 0.0) || (_last_transport_speed * speed < 0.0) || (_last_transport_speed == 0.0 && speed < 0.0)) {
1510 todo = PostTransportWork (todo | PostTransportReverse);
1511 _last_roll_or_reversal_location = _transport_sample;
1514 _last_transport_speed = _transport_speed;
1515 _transport_speed = speed;
1518 _default_transport_speed = speed;
1522 add_post_transport_work (todo);
1523 _butler->schedule_transport_work ();
1526 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC3 with speed = %1\n", _transport_speed));
1528 /* throttle signal emissions.
1529 * when slaved [_last]_transport_speed
1530 * usually changes every cycle (tiny amounts due to DLL).
1531 * Emitting a signal every cycle is overkill and unwarranted.
1533 * Using _last_transport_speed is not acceptable,
1534 * since it allows for large changes over a long period
1535 * of time. Hence we introduce a dedicated variable to keep track
1537 * The 0.2% dead-zone is somewhat arbitrary. Main use-case
1538 * for TransportStateChange() here is the ShuttleControl display.
1540 if (fabs (_signalled_varispeed - actual_speed ()) > .002
1541 // still, signal hard changes to 1.0 and 0.0:
1542 || (actual_speed () == 1.0 && _signalled_varispeed != 1.0)
1543 || (actual_speed () == 0.0 && _signalled_varispeed != 0.0)
1546 TransportStateChange (); /* EMIT SIGNAL */
1547 _signalled_varispeed = actual_speed ();
1553 /** Stop the transport. */
1555 Session::stop_transport (bool abort, bool clear_state)
1557 _count_in_once = false;
1558 if (_transport_speed == 0.0f) {
1562 DEBUG_TRACE (DEBUG::Transport, "time to actually stop\n");
1564 realtime_stop (abort, clear_state);
1565 _butler->schedule_transport_work ();
1568 /** Called from the process thread */
1570 Session::start_transport ()
1572 DEBUG_TRACE (DEBUG::Transport, "start_transport\n");
1574 _last_roll_location = _transport_sample;
1575 _last_roll_or_reversal_location = _transport_sample;
1576 _remaining_latency_preroll = worst_latency_preroll ();
1578 have_looped = false;
1580 /* if record status is Enabled, move it to Recording. if its
1581 already Recording, move it to Disabled.
1584 switch (record_status()) {
1586 if (!config.get_punch_in()) {
1587 /* This is only for UIs (keep blinking rec-en before
1588 * punch-in, don't show rec-region etc). The UI still
1589 * depends on SessionEvent::PunchIn and ensuing signals.
1591 * The disk-writers handle punch in/out internally
1592 * in their local delay-compensated timeframe.
1600 disable_record (false);
1608 _transport_speed = _default_transport_speed;
1609 _target_transport_speed = _transport_speed;
1611 if (!_engine.freewheeling()) {
1612 Timecode::Time time;
1613 timecode_time_subframes (_transport_sample, time);
1614 if (transport_master()->type() == MTC) {
1615 send_immediate_mmc (MIDI::MachineControlCommand (MIDI::MachineControl::cmdDeferredPlay));
1618 if (actively_recording() && click_data && (config.get_count_in () || _count_in_once)) {
1619 _count_in_once = false;
1620 /* calculate count-in duration (in audio samples)
1621 * - use [fixed] tempo/meter at _transport_sample
1622 * - calc duration of 1 bar + time-to-beat before or at transport_sample
1624 const Tempo& tempo = _tempo_map->tempo_at_sample (_transport_sample);
1625 const Meter& meter = _tempo_map->meter_at_sample (_transport_sample);
1627 const double num = meter.divisions_per_bar ();
1628 const double den = meter.note_divisor ();
1629 const double barbeat = _tempo_map->exact_qn_at_sample (_transport_sample, 0) * den / (4. * num);
1630 const double bar_fract = fmod (barbeat, 1.0); // fraction of bar elapsed.
1632 _count_in_samples = meter.samples_per_bar (tempo, _current_sample_rate);
1634 double dt = _count_in_samples / num;
1635 if (bar_fract == 0) {
1636 /* at bar boundary, count-in 2 bars before start. */
1637 _count_in_samples *= 2;
1639 /* beats left after full bar until roll position */
1640 _count_in_samples *= 1. + bar_fract;
1643 if (_count_in_samples > _remaining_latency_preroll) {
1644 _remaining_latency_preroll = _count_in_samples;
1648 samplepos_t cf = _transport_sample - _count_in_samples;
1649 samplecnt_t offset = _click_io->connected_latency (true);
1650 while (cf < _transport_sample + offset) {
1651 add_click (cf, clickbeat == 0);
1653 clickbeat = fmod (clickbeat + 1, num);
1656 if (_count_in_samples < _remaining_latency_preroll) {
1657 _count_in_samples = _remaining_latency_preroll;
1662 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC4 with speed = %1\n", _transport_speed));
1663 TransportStateChange (); /* EMIT SIGNAL */
1666 /** Do any transport work in the audio thread that needs to be done after the
1667 * transport thread is finished. Audio thread, realtime safe.
1670 Session::post_transport ()
1672 PostTransportWork ptw = post_transport_work ();
1674 if (ptw & PostTransportAudition) {
1675 if (auditioner && auditioner->auditioning()) {
1676 process_function = &Session::process_audition;
1678 process_function = &Session::process_with_events;
1682 if (ptw & PostTransportStop) {
1684 transport_sub_state = 0;
1687 if (ptw & PostTransportLocate) {
1689 if (((!config.get_external_sync() && (auto_play_legal && config.get_auto_play())) && !_exporting) || (ptw & PostTransportRoll)) {
1690 _count_in_once = false;
1693 transport_sub_state = 0;
1698 /* XXX is this really safe? shouldn't we just be unsetting the bits that we actually
1701 set_post_transport_work (PostTransportWork (0));
1705 Session::reset_rf_scale (samplecnt_t motion)
1707 cumulative_rf_motion += motion;
1709 if (cumulative_rf_motion < 4 * _current_sample_rate) {
1711 } else if (cumulative_rf_motion < 8 * _current_sample_rate) {
1713 } else if (cumulative_rf_motion < 16 * _current_sample_rate) {
1725 Session::unset_play_range ()
1727 _play_range = false;
1728 _clear_event_type (SessionEvent::RangeStop);
1729 _clear_event_type (SessionEvent::RangeLocate);
1733 Session::set_play_range (list<AudioRange>& range, bool leave_rolling)
1737 /* Called from event-processing context */
1739 unset_play_range ();
1741 if (range.empty()) {
1742 /* _play_range set to false in unset_play_range()
1744 if (!leave_rolling) {
1745 /* stop transport */
1746 SessionEvent* ev = new SessionEvent (SessionEvent::SetTransportSpeed, SessionEvent::Add, SessionEvent::Immediate, 0, 0.0f, false);
1754 /* cancel loop play */
1757 list<AudioRange>::size_type sz = range.size();
1761 list<AudioRange>::iterator i = range.begin();
1762 list<AudioRange>::iterator next;
1764 while (i != range.end()) {
1769 /* locating/stopping is subject to delays for declicking.
1772 samplepos_t requested_sample = i->end;
1774 if (requested_sample > current_block_size) {
1775 requested_sample -= current_block_size;
1777 requested_sample = 0;
1780 if (next == range.end()) {
1781 ev = new SessionEvent (SessionEvent::RangeStop, SessionEvent::Add, requested_sample, 0, 0.0f);
1783 ev = new SessionEvent (SessionEvent::RangeLocate, SessionEvent::Add, requested_sample, (*next).start, 0.0f);
1791 } else if (sz == 1) {
1793 ev = new SessionEvent (SessionEvent::RangeStop, SessionEvent::Add, range.front().end, 0, 0.0f);
1798 /* save range so we can do auto-return etc. */
1800 current_audio_range = range;
1802 /* now start rolling at the right place */
1804 ev = new SessionEvent (SessionEvent::LocateRoll, SessionEvent::Add, SessionEvent::Immediate, range.front().start, 0.0f, false);
1807 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC5 with speed = %1\n", _transport_speed));
1808 TransportStateChange ();
1812 Session::request_bounded_roll (samplepos_t start, samplepos_t end)
1814 AudioRange ar (start, end, 0);
1815 list<AudioRange> lar;
1818 request_play_range (&lar, true);
1822 Session::set_requested_return_sample (samplepos_t return_to)
1824 _requested_return_sample = return_to;
1828 Session::request_roll_at_and_return (samplepos_t start, samplepos_t return_to)
1830 SessionEvent *ev = new SessionEvent (SessionEvent::LocateRollLocate, SessionEvent::Add, SessionEvent::Immediate, return_to, 1.0);
1831 ev->target2_sample = start;
1836 Session::engine_halted ()
1840 /* there will be no more calls to process(), so
1841 we'd better clean up for ourselves, right now.
1843 but first, make sure the butler is out of
1851 realtime_stop (false, true);
1852 non_realtime_stop (false, 0, ignored);
1853 transport_sub_state = 0;
1855 DEBUG_TRACE (DEBUG::Transport, string_compose ("send TSC6 with speed = %1\n", _transport_speed));
1856 TransportStateChange (); /* EMIT SIGNAL */
1861 Session::xrun_recovery ()
1865 Xrun (_transport_sample); /* EMIT SIGNAL */
1867 if (Config->get_stop_recording_on_xrun() && actively_recording()) {
1869 /* it didn't actually halt, but we need
1870 to handle things in the same way.
1878 Session::route_processors_changed (RouteProcessorChange c)
1880 if (g_atomic_int_get (&_ignore_route_processor_changes) > 0) {
1884 if (c.type == RouteProcessorChange::MeterPointChange) {
1889 if (c.type == RouteProcessorChange::RealTimeChange) {
1894 update_latency_compensation ();
1901 Session::allow_auto_play (bool yn)
1903 auto_play_legal = yn;
1907 Session::maybe_stop (samplepos_t limit)
1909 if ((_transport_speed > 0.0f && _transport_sample >= limit) || (_transport_speed < 0.0f && _transport_sample == 0)) {
1910 if (synced_to_engine () && config.get_jack_time_master ()) {
1911 _engine.transport_stop ();
1912 } else if (!synced_to_engine ()) {
1921 Session::send_mmc_locate (samplepos_t t)
1927 if (!_engine.freewheeling()) {
1928 Timecode::Time time;
1929 timecode_time_subframes (t, time);
1930 send_immediate_mmc (MIDI::MachineControlCommand (time));
1934 /** Ask the transport to not send timecode until further notice. The suspension
1935 * will come into effect some finite time after this call, and timecode_transmission_suspended()
1936 * should be checked by the caller to find out when.
1939 Session::request_suspend_timecode_transmission ()
1941 SessionEvent* ev = new SessionEvent (SessionEvent::SetTimecodeTransmission, SessionEvent::Add, SessionEvent::Immediate, 0, 0, false);
1946 Session::request_resume_timecode_transmission ()
1948 SessionEvent* ev = new SessionEvent (SessionEvent::SetTimecodeTransmission, SessionEvent::Add, SessionEvent::Immediate, 0, 0, true);
1953 Session::timecode_transmission_suspended () const
1955 return g_atomic_int_get (&_suspend_timecode_transmission) == 1;
1958 boost::shared_ptr<TransportMaster>
1959 Session::transport_master() const
1961 return TransportMasterManager::instance().current();
1965 Session::transport_master_is_external () const
1967 return config.get_external_sync();
1971 Session::sync_source_changed (SyncSource type, samplepos_t pos, pframes_t cycle_nframes)
1973 /* Runs in process() context */
1975 boost::shared_ptr<TransportMaster> master = TransportMasterManager::instance().current();
1977 /* save value of seamless from before the switch */
1978 _was_seamless = Config->get_seamless_loop ();
1980 if (type == Engine) {
1981 /* JACK cannot support seamless looping at present */
1982 Config->set_seamless_loop (false);
1984 /* reset to whatever the value was before we last switched slaves */
1985 Config->set_seamless_loop (_was_seamless);
1988 if (master->can_loop()) {
1989 request_play_loop (false);
1990 } else if (master->has_loop()) {
1991 request_play_loop (true);
1994 /* slave change, reset any DiskIO block on disk output because it is no
1995 longer valid with a new slave.
1998 DiskReader::set_no_disk_output (false);
2001 we should not be treating specific transport masters as special cases because there maybe > 1 of a particular type
2003 boost::shared_ptr<MTC_TransportMaster> mtc_master = boost::dynamic_pointer_cast<MTC_TransportMaster> (master);
2006 mtc_master->ActiveChanged.connect_same_thread (mtc_status_connection, boost::bind (&Session::mtc_status_changed, this, _1));
2007 MTCSyncStateChanged(mtc_master->locked() );
2009 if (g_atomic_int_compare_and_exchange (&_mtc_active, 1, 0)) {
2010 MTCSyncStateChanged( false );
2012 mtc_status_connection.disconnect ();
2015 boost::shared_ptr<LTC_TransportMaster> ltc_master = boost::dynamic_pointer_cast<LTC_TransportMaster> (master);
2018 ltc_master->ActiveChanged.connect_same_thread (ltc_status_connection, boost::bind (&Session::ltc_status_changed, this, _1));
2019 LTCSyncStateChanged (ltc_master->locked() );
2021 if (g_atomic_int_compare_and_exchange (&_ltc_active, 1, 0)) {
2022 LTCSyncStateChanged( false );
2024 ltc_status_connection.disconnect ();
2028 DEBUG_TRACE (DEBUG::Slave, string_compose ("set new slave to %1\n", master));
2030 // need to queue this for next process() cycle
2031 _send_timecode_update = true;
2033 boost::shared_ptr<RouteList> rl = routes.reader();
2034 const bool externally_slaved = transport_master_is_external();
2036 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
2037 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
2038 if (tr && !tr->is_private_route()) {
2039 tr->set_slaved (externally_slaved);