2 Copyright (C) 1999-2002 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.
25 #include "pbd/error.h"
26 #include "pbd/enumwriter.h"
28 #include <glibmm/threads.h>
30 #include "ardour/audioengine.h"
31 #include "ardour/auditioner.h"
32 #include "ardour/butler.h"
33 #include "ardour/cycle_timer.h"
34 #include "ardour/debug.h"
35 #include "ardour/disk_reader.h"
36 #include "ardour/graph.h"
37 #include "ardour/port.h"
38 #include "ardour/process_thread.h"
39 #include "ardour/scene_changer.h"
40 #include "ardour/session.h"
41 #include "ardour/slave.h"
42 #include "ardour/ticker.h"
43 #include "ardour/types.h"
44 #include "ardour/vca.h"
45 #include "ardour/vca_manager.h"
47 #include "midi++/mmc.h"
51 using namespace ARDOUR;
55 /** Called by the audio engine when there is work to be done with JACK.
56 * @param nframes Number of frames to process.
60 Session::process (pframes_t nframes)
62 framepos_t transport_at_start = _transport_frame;
66 if (processing_blocked()) {
71 if (non_realtime_work_pending()) {
72 if (!_butler->transport_work_requested ()) {
77 _engine.main_thread()->get_buffers ();
79 (this->*process_function) (nframes);
81 /* realtime-safe meter-position and processor-order changes
83 * ideally this would be done in
84 * Route::process_output_buffers() but various functions
85 * callig it hold a _processor_lock reader-lock
87 boost::shared_ptr<RouteList> r = routes.reader ();
88 for (RouteList::const_iterator i = r->begin(); i != r->end(); ++i) {
89 if ((*i)->apply_processor_changes_rt()) {
90 _rt_emit_pending = true;
93 if (_rt_emit_pending) {
94 if (!_rt_thread_active) {
95 emit_route_signals ();
97 if (pthread_mutex_trylock (&_rt_emit_mutex) == 0) {
98 pthread_cond_signal (&_rt_emit_cond);
99 pthread_mutex_unlock (&_rt_emit_mutex);
100 _rt_emit_pending = false;
104 _engine.main_thread()->drop_buffers ();
106 /* deliver MIDI clock. Note that we need to use the transport frame
107 * position at the start of process(), not the value at the end of
108 * it. We may already have ticked() because of a transport state
109 * change, for example.
113 if (!_silent && !_engine.freewheeling() && Config->get_send_midi_clock() && (transport_speed() == 1.0f || transport_speed() == 0.0f) && midi_clock->has_midi_port()) {
114 midi_clock->tick (transport_at_start, nframes);
117 _scene_changer->run (transport_at_start, transport_at_start + nframes);
120 /* don't bother with a message */
123 SendFeedback (); /* EMIT SIGNAL */
127 Session::fail_roll (pframes_t nframes)
129 return no_roll (nframes);
133 Session::no_roll (pframes_t nframes)
137 framepos_t end_frame = _transport_frame + nframes; // FIXME: varispeed + no_roll ??
139 int declick = (config.get_use_transport_fades() ? get_transport_declick_required() : false);
140 boost::shared_ptr<RouteList> r = routes.reader ();
143 _click_io->silence (nframes);
146 ltc_tx_send_time_code_for_cycle (_transport_frame, end_frame, _target_transport_speed, _transport_speed, nframes);
148 VCAList v = _vca_manager->vcas ();
149 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
150 (*i)->automation_run (_transport_frame, nframes);
153 if (_process_graph) {
154 DEBUG_TRACE(DEBUG::ProcessThreads,"calling graph/no-roll\n");
155 _process_graph->routes_no_roll( nframes, _transport_frame, end_frame, non_realtime_work_pending(), declick);
157 PT_TIMING_CHECK (10);
158 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
160 if ((*i)->is_auditioner()) {
164 (*i)->set_pending_declick (declick);
166 if ((*i)->no_roll (nframes, _transport_frame, end_frame, non_realtime_work_pending())) {
167 error << string_compose(_("Session: error in no roll for %1"), (*i)->name()) << endmsg;
172 PT_TIMING_CHECK (11);
179 /** @param need_butler to be set to true by this method if it needs the butler,
180 * otherwise it must be left alone.
183 Session::process_routes (pframes_t nframes, bool& need_butler)
185 int declick = (config.get_use_transport_fades() ? get_transport_declick_required() : false);
186 boost::shared_ptr<RouteList> r = routes.reader ();
188 const framepos_t start_frame = _transport_frame;
189 const framepos_t end_frame = _transport_frame + floor (nframes * _transport_speed);
191 VCAList v = _vca_manager->vcas ();
192 for (VCAList::const_iterator i = v.begin(); i != v.end(); ++i) {
193 (*i)->automation_run (start_frame, nframes);
196 _global_locate_pending = locate_pending ();
198 if (_process_graph) {
199 DEBUG_TRACE(DEBUG::ProcessThreads,"calling graph/process-routes\n");
200 if (_process_graph->process_routes (nframes, start_frame, end_frame, declick, need_butler) < 0) {
206 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
210 if ((*i)->is_auditioner()) {
214 (*i)->set_pending_declick (declick);
218 if ((ret = (*i)->roll (nframes, start_frame, end_frame, declick, b)) < 0) {
224 DEBUG_TRACE (DEBUG::Butler, string_compose ("%1 rolled and needs butler\n", (*i)->name()));
234 Session::get_track_statistics ()
239 boost::shared_ptr<RouteList> rl = routes.reader();
240 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
242 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
244 if (!tr || tr->is_private_route()) {
248 pworst = min (pworst, tr->playback_buffer_load());
249 cworst = min (cworst, tr->capture_buffer_load());
252 g_atomic_int_set (&_playback_load, (uint32_t) floor (pworst * 100.0f));
253 g_atomic_int_set (&_capture_load, (uint32_t) floor (cworst * 100.0f));
255 if (actively_recording()) {
260 /** Process callback used when the auditioner is not active */
262 Session::process_with_events (pframes_t nframes)
267 pframes_t this_nframes;
268 framepos_t end_frame;
269 bool session_needs_butler = false;
270 framecnt_t frames_moved;
272 /* make sure the auditioner is silent */
275 auditioner->silence (nframes);
278 /* handle any pending events */
280 while (pending_events.read (&ev, 1) == 1) {
284 /* if we are not in the middle of a state change,
285 and there are immediate events queued up,
289 while (!non_realtime_work_pending() && !immediate_events.empty()) {
290 SessionEvent *ev = immediate_events.front ();
291 immediate_events.pop_front ();
296 if (_transport_speed != 1.0 && _count_in_samples > 0) {
297 _count_in_samples = 0;
300 if (_count_in_samples > 0) {
301 framecnt_t ns = std::min ((framecnt_t)nframes, _count_in_samples);
304 run_click (_transport_frame - _count_in_samples, ns);
306 _count_in_samples -= ns;
309 /* process events.. */
310 if (!events.empty() && next_event != events.end()) {
311 SessionEvent* this_event = *next_event;
312 Events::iterator the_next_one = next_event;
315 while (this_event && this_event->action_frame == _transport_frame) {
316 process_event (this_event);
317 if (the_next_one == events.end()) {
320 this_event = *the_next_one;
327 check_declick_out ();
332 _engine.split_cycle (ns);
336 /* Decide on what to do with quarter-frame MTC during this cycle */
338 bool const was_sending_qf_mtc = _send_qf_mtc;
339 double const tolerance = Config->get_mtc_qf_speed_tolerance() / 100.0;
341 if (_transport_speed != 0) {
343 Config->get_send_mtc () &&
344 _transport_speed >= (1 - tolerance) &&
345 _transport_speed <= (1 + tolerance)
348 if (_send_qf_mtc && !was_sending_qf_mtc) {
349 /* we will re-start quarter-frame MTC this cycle, so send a full update to set things up */
350 _send_timecode_update = true;
353 if (Config->get_send_mtc() && !_send_qf_mtc && _pframes_since_last_mtc > (frame_rate () / 4)) {
354 /* we're sending MTC, but we're not sending QF MTC at the moment, and it's been
355 a quarter of a second since we sent anything at all, so send a full MTC update
358 _send_timecode_update = true;
361 _pframes_since_last_mtc += nframes;
364 /* Events caused a transport change (or we re-started sending
365 * MTC), so send an MTC Full Frame (Timecode) message. This
366 * is sent whether rolling or not, to give slaves an idea of
367 * ardour time on locates (and allow slow slaves to position
368 * and prepare for rolling)
370 if (_send_timecode_update) {
371 send_full_time_code (_transport_frame, nframes);
374 if (!process_can_proceed()) {
379 if (events.empty() || next_event == events.end()) {
380 try_run_lua (nframes); // also during export ?? ->move to process_without_events()
381 /* lua scripts may inject events */
382 while (_n_lua_scripts > 0 && pending_events.read (&ev, 1) == 1) {
385 if (events.empty() || next_event == events.end()) {
386 process_without_events (nframes);
391 if (locate_pending()) {
394 if (_transport_speed == 1.0) {
395 frames_moved = (framecnt_t) nframes;
397 interpolation.set_target_speed (_target_transport_speed);
398 interpolation.set_speed (_transport_speed);
399 frames_moved = (framecnt_t) interpolation.interpolate (0, nframes, 0, 0);
403 end_frame = _transport_frame + frames_moved;
406 SessionEvent* this_event;
407 Events::iterator the_next_one;
409 if (!process_can_proceed()) {
414 if (!_exporting && _slave) {
415 if (!follow_slave (nframes)) {
420 if (_transport_speed == 0) {
425 if (!_exporting && !timecode_transmission_suspended()) {
426 send_midi_time_code_for_cycle (_transport_frame, end_frame, nframes);
429 ltc_tx_send_time_code_for_cycle (_transport_frame, end_frame, _target_transport_speed, _transport_speed, nframes);
431 framepos_t stop_limit = compute_stop_limit ();
433 if (maybe_stop (stop_limit)) {
438 this_event = *next_event;
439 the_next_one = next_event;
442 /* yes folks, here it is, the actual loop where we really truly
448 this_nframes = nframes; /* real (jack) time relative */
449 if (locate_pending()) {
452 frames_moved = (framecnt_t) floor (_transport_speed * nframes); /* transport relative */
455 /* running an event, position transport precisely to its time */
456 if (this_event && this_event->action_frame <= end_frame && this_event->action_frame >= _transport_frame) {
457 /* this isn't quite right for reverse play */
458 frames_moved = (framecnt_t) (this_event->action_frame - _transport_frame);
459 this_nframes = abs (floor(frames_moved / _transport_speed));
462 try_run_lua (this_nframes);
466 click (_transport_frame, this_nframes);
468 if (process_routes (this_nframes, session_needs_butler)) {
473 get_track_statistics ();
475 nframes -= this_nframes;
477 if (frames_moved < 0) {
478 decrement_transport_position (-frames_moved);
479 } else if (frames_moved) {
480 increment_transport_position (frames_moved);
483 maybe_stop (stop_limit);
484 check_declick_out ();
488 _engine.split_cycle (this_nframes);
491 /* now handle this event and all others scheduled for the same time */
493 while (this_event && this_event->action_frame == _transport_frame) {
494 process_event (this_event);
496 if (the_next_one == events.end()) {
499 this_event = *the_next_one;
504 /* if an event left our state changing, do the right thing */
506 if (nframes && non_realtime_work_pending()) {
511 /* this is necessary to handle the case of seamless looping */
512 end_frame = _transport_frame + floor (nframes * _transport_speed);
517 } /* implicit release of route lock */
519 if (session_needs_butler) {
520 DEBUG_TRACE (DEBUG::Butler, "p-with-events: session needs butler, call it\n");
526 Session::reset_slave_state ()
528 average_slave_delta = 1800;
529 delta_accumulator_cnt = 0;
530 have_first_delta_accumulator = false;
531 _slave_state = Stopped;
532 DiskReader::set_no_disk_output (false);
536 Session::transport_locked () const
540 if (!locate_pending() && (!config.get_external_sync() || (sl && sl->ok() && sl->locked()))) {
548 Session::follow_slave (pframes_t nframes)
551 framepos_t slave_transport_frame;
552 framecnt_t this_delta;
557 config.set_external_sync (false);
561 _slave->speed_and_position (slave_speed, slave_transport_frame);
563 DEBUG_TRACE (DEBUG::Slave, string_compose ("Slave position %1 speed %2\n", slave_transport_frame, slave_speed));
565 if (!_slave->locked()) {
566 DEBUG_TRACE (DEBUG::Slave, "slave not locked\n");
570 if (slave_transport_frame > _transport_frame) {
571 this_delta = slave_transport_frame - _transport_frame;
574 this_delta = _transport_frame - slave_transport_frame;
578 if (_slave->starting()) {
582 if (_slave->is_always_synced() ||
583 (Config->get_timecode_source_is_synced() && (dynamic_cast<TimecodeSlave*>(_slave)) != 0)
586 /* if the TC source is synced, then we assume that its
587 speed is binary: 0.0 or 1.0
590 if (slave_speed != 0.0f) {
596 /* if we are chasing and the average delta between us and the
597 master gets too big, we want to switch to silent
598 motion. so keep track of that here.
601 if (_slave_state == Running) {
602 calculate_moving_average_of_slave_delta(dir, abs(this_delta));
606 track_slave_state (slave_speed, slave_transport_frame, this_delta);
608 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave state %1 @ %2 speed %3 cur delta %4 avg delta %5\n",
609 _slave_state, slave_transport_frame, slave_speed, this_delta, average_slave_delta));
612 if (_slave_state == Running && !_slave->is_always_synced() && !(Config->get_timecode_source_is_synced() && (dynamic_cast<TimecodeSlave*>(_slave)) != 0)) {
614 /* may need to varispeed to sync with slave */
616 if (_transport_speed != 0.0f) {
619 note that average_dir is +1 or -1
624 if (average_slave_delta == 0) {
628 delta = average_slave_delta;
629 delta *= average_dir;
633 if (slave_speed != 0.0) {
634 DEBUG_TRACE (DEBUG::Slave, string_compose ("delta = %1 speed = %2 ts = %3 M@%4 S@%5 avgdelta %6\n",
635 (int) (dir * this_delta),
639 slave_transport_frame,
640 average_slave_delta));
644 if (_slave->give_slave_full_control_over_transport_speed()) {
645 set_transport_speed (slave_speed, 0, false, false);
646 //std::cout << "set speed = " << slave_speed << "\n";
648 float adjusted_speed = slave_speed + (1.5 * (delta / float(_current_frame_rate)));
649 request_transport_speed (adjusted_speed);
650 DEBUG_TRACE (DEBUG::Slave, string_compose ("adjust using %1 towards %2 ratio %3 current %4 slave @ %5\n",
651 delta, adjusted_speed, adjusted_speed/slave_speed, _transport_speed,
655 if (!actively_recording() && (framecnt_t) average_slave_delta > _slave->resolution()) {
656 DEBUG_TRACE (DEBUG::Slave, string_compose ("average slave delta %1 greater than slave resolution %2 => no disk output\n", average_slave_delta, _slave->resolution()));
657 /* run routes as normal, but no disk output */
658 DiskReader::set_no_disk_output (true);
662 if (!have_first_delta_accumulator) {
663 DEBUG_TRACE (DEBUG::Slave, "waiting for first slave delta accumulator to be ready, no disk output\n");
664 /* run routes as normal, but no disk output */
665 DiskReader::set_no_disk_output (true);
672 if (!have_first_delta_accumulator) {
673 DEBUG_TRACE (DEBUG::Slave, "still waiting to compute slave delta, no disk output\n");
674 DiskReader::set_no_disk_output (true);
676 DiskReader::set_no_disk_output (false);
679 if ((_slave_state == Running) && (0 == (post_transport_work () & ~PostTransportSpeed))) {
680 /* speed is set, we're locked, and good to go */
685 /* don't move at all */
686 DEBUG_TRACE (DEBUG::Slave, "no roll\n")
692 Session::calculate_moving_average_of_slave_delta (int dir, framecnt_t this_delta)
694 if (delta_accumulator_cnt >= delta_accumulator_size) {
695 have_first_delta_accumulator = true;
696 delta_accumulator_cnt = 0;
699 if (delta_accumulator_cnt != 0 || this_delta < _current_frame_rate) {
700 delta_accumulator[delta_accumulator_cnt++] = (framecnt_t) dir * (framecnt_t) this_delta;
703 if (have_first_delta_accumulator) {
704 average_slave_delta = 0L;
705 for (int i = 0; i < delta_accumulator_size; ++i) {
706 average_slave_delta += delta_accumulator[i];
708 average_slave_delta /= (int32_t) delta_accumulator_size;
709 if (average_slave_delta < 0L) {
711 average_slave_delta = average_slave_delta;
719 Session::track_slave_state (float slave_speed, framepos_t slave_transport_frame, framecnt_t /*this_delta*/)
721 if (slave_speed != 0.0f) {
723 /* slave is running */
725 switch (_slave_state) {
727 if (_slave->requires_seekahead()) {
728 slave_wait_end = slave_transport_frame + _slave->seekahead_distance ();
729 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave stopped, but running, requires seekahead to %1\n", slave_wait_end));
730 /* we can call locate() here because we are in process context */
731 locate (slave_wait_end, false, false);
732 _slave_state = Waiting;
736 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave stopped -> running at %1\n", slave_transport_frame));
738 memset (delta_accumulator, 0, sizeof (int32_t) * delta_accumulator_size);
739 average_slave_delta = 0L;
741 Location* al = _locations->auto_loop_location();
743 if (al && play_loop && (slave_transport_frame < al->start() || slave_transport_frame > al->end())) {
745 request_play_loop(false);
748 if (slave_transport_frame != _transport_frame) {
749 DEBUG_TRACE (DEBUG::Slave, string_compose ("require locate to run. eng: %1 -> sl: %2\n", _transport_frame, slave_transport_frame));
750 locate (slave_transport_frame, false, false);
752 _slave_state = Running;
761 if (_slave_state == Waiting) {
763 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave waiting at %1\n", slave_transport_frame));
765 if (slave_transport_frame >= slave_wait_end) {
767 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave start at %1 vs %2\n", slave_transport_frame, _transport_frame));
769 _slave_state = Running;
771 /* now perform a "micro-seek" within the disk buffers to realign ourselves
772 precisely with the master.
777 framecnt_t frame_delta = slave_transport_frame - _transport_frame;
779 boost::shared_ptr<RouteList> rl = routes.reader();
780 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
781 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
782 if (tr && !tr->can_internal_playback_seek (frame_delta)) {
789 for (RouteList::iterator i = rl->begin(); i != rl->end(); ++i) {
790 boost::shared_ptr<Track> tr = boost::dynamic_pointer_cast<Track> (*i);
792 tr->internal_playback_seek (frame_delta);
795 _transport_frame += frame_delta;
798 cerr << "cannot micro-seek\n";
804 if (_slave_state == Running && _transport_speed == 0.0f) {
805 DEBUG_TRACE (DEBUG::Slave, "slave starts transport\n");
809 } else { // slave_speed is 0
811 /* slave has stopped */
813 if (_transport_speed != 0.0f) {
814 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave stops transport: %1 frame %2 tf %3\n", slave_speed, slave_transport_frame, _transport_frame));
818 if (slave_transport_frame != _transport_frame) {
819 DEBUG_TRACE (DEBUG::Slave, string_compose ("slave stopped, move to %1\n", slave_transport_frame));
820 force_locate (slave_transport_frame, false);
828 Session::process_without_events (pframes_t nframes)
830 bool session_needs_butler = false;
831 framecnt_t frames_moved;
833 if (!process_can_proceed()) {
838 if (!_exporting && _slave) {
839 if (!follow_slave (nframes)) {
840 ltc_tx_send_time_code_for_cycle (_transport_frame, _transport_frame, 0, 0 , nframes);
845 if (_transport_speed == 0) {
850 if (locate_pending()) {
853 if (_transport_speed == 1.0) {
854 frames_moved = (framecnt_t) nframes;
856 interpolation.set_target_speed (_target_transport_speed);
857 interpolation.set_speed (_transport_speed);
858 frames_moved = (framecnt_t) interpolation.interpolate (0, nframes, 0, 0);
862 if (!_exporting && !timecode_transmission_suspended()) {
863 send_midi_time_code_for_cycle (_transport_frame, _transport_frame + frames_moved, nframes);
866 ltc_tx_send_time_code_for_cycle (_transport_frame, _transport_frame + frames_moved, _target_transport_speed, _transport_speed, nframes);
868 framepos_t const stop_limit = compute_stop_limit ();
870 if (maybe_stop (stop_limit)) {
875 if (maybe_sync_start (nframes)) {
879 click (_transport_frame, nframes);
881 if (process_routes (nframes, session_needs_butler)) {
886 get_track_statistics ();
888 if (frames_moved < 0) {
889 decrement_transport_position (-frames_moved);
890 } else if (frames_moved) {
891 increment_transport_position (frames_moved);
894 maybe_stop (stop_limit);
895 check_declick_out ();
897 if (session_needs_butler) {
898 DEBUG_TRACE (DEBUG::Butler, "p-without-events: session needs butler, call it\n");
903 /** Process callback used when the auditioner is active.
904 * @param nframes number of frames to process.
907 Session::process_audition (pframes_t nframes)
910 boost::shared_ptr<RouteList> r = routes.reader ();
912 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
913 if (!(*i)->is_auditioner()) {
914 (*i)->silence (nframes);
918 /* run the auditioner, and if it says we need butler service, ask for it */
920 if (auditioner->play_audition (nframes) > 0) {
921 DEBUG_TRACE (DEBUG::Butler, "auditioner needs butler, call it\n");
925 /* if using a monitor section, run it because otherwise we don't hear anything */
927 if (_monitor_out && auditioner->needs_monitor()) {
928 _monitor_out->monitor_run (_transport_frame, _transport_frame + nframes, nframes, false);
931 /* handle pending events */
933 while (pending_events.read (&ev, 1) == 1) {
937 /* if we are not in the middle of a state change,
938 and there are immediate events queued up,
942 while (!non_realtime_work_pending() && !immediate_events.empty()) {
943 SessionEvent *ev = immediate_events.front ();
944 immediate_events.pop_front ();
948 if (!auditioner->auditioning()) {
949 /* auditioner no longer active, so go back to the normal process callback */
950 process_function = &Session::process_with_events;
955 Session::maybe_sync_start (pframes_t & nframes)
957 pframes_t sync_offset;
959 if (!waiting_for_sync_offset) {
963 if (_engine.get_sync_offset (sync_offset) && sync_offset < nframes) {
965 /* generate silence up to the sync point, then
966 adjust nframes + offset to reflect whatever
970 no_roll (sync_offset);
971 nframes -= sync_offset;
972 Port::increment_global_port_buffer_offset (sync_offset);
973 waiting_for_sync_offset = false;
976 return true; // done, nothing left to process
981 /* sync offset point is not within this process()
982 cycle, so just generate silence. and don't bother
983 with any fancy stuff here, just the minimal silence.
988 if (Config->get_locate_while_waiting_for_sync()) {
989 if (micro_locate (nframes)) {
990 /* XXX ERROR !!! XXX */
994 return true; // done, nothing left to process
1001 Session::queue_event (SessionEvent* ev)
1003 if (_state_of_the_state & Deletion) {
1005 } else if (_state_of_the_state & Loading) {
1008 Glib::Threads::Mutex::Lock lm (rb_write_lock);
1009 pending_events.write (&ev, 1);
1014 Session::set_next_event ()
1016 if (events.empty()) {
1017 next_event = events.end();
1021 if (next_event == events.end()) {
1022 next_event = events.begin();
1025 if ((*next_event)->action_frame > _transport_frame) {
1026 next_event = events.begin();
1029 for (; next_event != events.end(); ++next_event) {
1030 if ((*next_event)->action_frame >= _transport_frame) {
1037 Session::process_event (SessionEvent* ev)
1042 /* if we're in the middle of a state change (i.e. waiting
1043 for the butler thread to complete the non-realtime
1044 part of the change), we'll just have to queue this
1045 event for a time when the change is complete.
1048 if (non_realtime_work_pending()) {
1050 /* except locates, which we have the capability to handle */
1052 if (ev->type != SessionEvent::Locate) {
1053 immediate_events.insert (immediate_events.end(), ev);
1059 DEBUG_TRACE (DEBUG::SessionEvents, string_compose ("Processing event: %1 @ %2\n", enum_2_string (ev->type), _transport_frame));
1062 case SessionEvent::SetLoop:
1063 set_play_loop (ev->yes_or_no, ev->speed);
1066 case SessionEvent::AutoLoop:
1068 /* roll after locate, do not flush, set "with loop"
1069 true only if we are seamless looping
1071 start_locate (ev->target_frame, true, false, Config->get_seamless_loop());
1077 case SessionEvent::AutoLoopDeclick:
1079 /* Request a declick fade-out and a fade-in; the fade-out will happen
1080 at the end of the loop, and the fade-in at the start.
1082 transport_sub_state |= (PendingLoopDeclickOut | PendingLoopDeclickIn);
1088 case SessionEvent::Locate:
1089 if (ev->yes_or_no) {
1090 /* args: do not roll after locate, do flush, not with loop */
1091 locate (ev->target_frame, false, true, false);
1093 /* args: do not roll after locate, do flush, not with loop */
1094 start_locate (ev->target_frame, false, true, false);
1096 _send_timecode_update = true;
1099 case SessionEvent::LocateRoll:
1100 if (ev->yes_or_no) {
1101 /* args: roll after locate, do flush, not with loop */
1102 locate (ev->target_frame, true, true, false);
1104 /* args: roll after locate, do flush, not with loop */
1105 start_locate (ev->target_frame, true, true, false);
1107 _send_timecode_update = true;
1110 case SessionEvent::Skip:
1111 if (Config->get_skip_playback()) {
1112 start_locate (ev->target_frame, true, true, false);
1113 _send_timecode_update = true;
1119 case SessionEvent::LocateRollLocate:
1120 // locate is handled by ::request_roll_at_and_return()
1121 _requested_return_frame = ev->target_frame;
1122 request_locate (ev->target2_frame, true);
1126 case SessionEvent::SetTransportSpeed:
1127 set_transport_speed (ev->speed, ev->target_frame, ev->yes_or_no, ev->second_yes_or_no, ev->third_yes_or_no);
1130 case SessionEvent::PunchIn:
1131 // cerr << "PunchIN at " << transport_frame() << endl;
1132 if (config.get_punch_in() && record_status() == Enabled && !preroll_record_punch_enabled()) {
1139 case SessionEvent::PunchOut:
1140 // cerr << "PunchOUT at " << transport_frame() << endl;
1141 if (config.get_punch_out() && !preroll_record_punch_enabled()) {
1142 step_back_from_record ();
1148 case SessionEvent::RecordStart:
1149 if (preroll_record_punch_enabled() && record_status() == Enabled) {
1156 case SessionEvent::StopOnce:
1157 if (!non_realtime_work_pending()) {
1158 _clear_event_type (SessionEvent::StopOnce);
1159 stop_transport (ev->yes_or_no);
1165 case SessionEvent::RangeStop:
1166 if (!non_realtime_work_pending()) {
1167 stop_transport (ev->yes_or_no);
1173 case SessionEvent::RangeLocate:
1174 /* args: roll after locate, do flush, not with loop */
1175 start_locate (ev->target_frame, true, true, false);
1180 case SessionEvent::Overwrite:
1181 overwrite_some_buffers (static_cast<Track*>(ev->ptr));
1184 case SessionEvent::SetSyncSource:
1185 DEBUG_TRACE (DEBUG::Slave, "seen request for new slave\n");
1186 use_sync_source (ev->slave);
1189 case SessionEvent::Audition:
1190 set_audition (ev->region);
1191 // drop reference to region
1192 ev->region.reset ();
1195 case SessionEvent::SetPlayAudioRange:
1196 set_play_range (ev->audio_range, (ev->speed == 1.0f));
1199 case SessionEvent::CancelPlayAudioRange:
1203 case SessionEvent::RealTimeOperation:
1205 del = false; // other side of RT request needs to clean up
1208 case SessionEvent::AdjustPlaybackBuffering:
1209 schedule_playback_buffering_adjustment ();
1212 case SessionEvent::AdjustCaptureBuffering:
1213 schedule_capture_buffering_adjustment ();
1216 case SessionEvent::SetTimecodeTransmission:
1217 g_atomic_int_set (&_suspend_timecode_transmission, ev->yes_or_no ? 0 : 1);
1221 fatal << string_compose(_("Programming error: illegal event type in process_event (%1)"), ev->type) << endmsg;
1222 abort(); /*NOTREACHED*/
1227 del = del && !_remove_event (ev);
1236 Session::compute_stop_limit () const
1238 if (!Config->get_stop_at_session_end ()) {
1239 return max_framepos;
1243 return max_framepos;
1246 if (preroll_record_punch_enabled ()) {
1247 return max_framepos;
1250 bool const punching_in = (config.get_punch_in () && _locations->auto_punch_location());
1251 bool const punching_out = (config.get_punch_out () && _locations->auto_punch_location());
1253 if (actively_recording ()) {
1254 /* permanently recording */
1255 return max_framepos;
1256 } else if (punching_in && !punching_out) {
1257 /* punching in but never out */
1258 return max_framepos;
1259 } else if (punching_in && punching_out && _locations->auto_punch_location()->end() > current_end_frame()) {
1260 /* punching in and punching out after session end */
1261 return max_framepos;
1264 return current_end_frame ();
1269 /* dedicated thread for signal emission.
1271 * while sending cross-thread signals from the process thread
1272 * is fine in general, PBD::Signal's use of boost::function and
1273 * boost:bind can produce a vast overhead which is not
1274 * acceptable for low latency.
1276 * This works around the issue by moving the boost overhead
1277 * out of the RT thread. The overall load is probably higher but
1278 * the realtime thread remains unaffected.
1282 Session::emit_route_signals ()
1284 // TODO use RAII to allow using these signals in other places
1285 BatchUpdateStart(); /* EMIT SIGNAL */
1286 boost::shared_ptr<RouteList> r = routes.reader ();
1287 for (RouteList::const_iterator ci = r->begin(); ci != r->end(); ++ci) {
1288 (*ci)->emit_pending_signals ();
1290 BatchUpdateEnd(); /* EMIT SIGNAL */
1294 Session::emit_thread_start ()
1296 if (_rt_thread_active) {
1299 _rt_thread_active = true;
1301 if (pthread_create (&_rt_emit_thread, NULL, emit_thread, this)) {
1302 _rt_thread_active = false;
1307 Session::emit_thread_terminate ()
1309 if (!_rt_thread_active) {
1312 _rt_thread_active = false;
1314 if (pthread_mutex_lock (&_rt_emit_mutex) == 0) {
1315 pthread_cond_signal (&_rt_emit_cond);
1316 pthread_mutex_unlock (&_rt_emit_mutex);
1320 pthread_join (_rt_emit_thread, &status);
1324 Session::emit_thread (void *arg)
1326 Session *s = static_cast<Session *>(arg);
1327 s->emit_thread_run ();
1333 Session::emit_thread_run ()
1335 pthread_mutex_lock (&_rt_emit_mutex);
1336 while (_rt_thread_active) {
1337 emit_route_signals();
1338 pthread_cond_wait (&_rt_emit_cond, &_rt_emit_mutex);
1340 pthread_mutex_unlock (&_rt_emit_mutex);