3 Copyright (C) 1999-2002 Paul Davis
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
29 #include <boost/shared_ptr.hpp>
31 #include <midi++/mmc.h>
32 #include <midi++/port.h>
33 #include <midi++/manager.h>
34 #include <pbd/error.h>
35 #include <glibmm/thread.h>
36 #include <pbd/pthread_utils.h>
38 #include <ardour/configuration.h>
39 #include <ardour/audioengine.h>
40 #include <ardour/session.h>
41 #include <ardour/audio_track.h>
42 #include <ardour/midi_track.h>
43 #include <ardour/audio_diskstream.h>
44 #include <ardour/slave.h>
45 #include <ardour/cycles.h>
46 #include <ardour/smpte.h>
51 using namespace ARDOUR;
55 MachineControl::CommandSignature MMC_CommandSignature;
56 MachineControl::ResponseSignature MMC_ResponseSignature;
63 boost::shared_ptr<RouteList> r = routes.reader ();
65 for (RouteList::iterator i = r->begin(); i != r->end(); ++i) {
66 MidiTrack *track = dynamic_cast<MidiTrack*>((*i).get());
75 Session::use_config_midi_ports ()
79 if (default_mmc_port) {
80 set_mmc_port (default_mmc_port->name());
85 if (default_mtc_port) {
86 set_mtc_port (default_mtc_port->name());
91 if (default_midi_port) {
92 set_midi_port (default_midi_port->name());
97 if (default_midi_clock_port) {
98 set_midi_clock_port (default_midi_clock_port->name());
100 set_midi_clock_port ("");
107 /***********************************************************************
109 **********************************************************************/
112 Session::set_mtc_port (string port_tag)
116 if (port_tag.length() == 0) {
118 if (_slave && ((ms = dynamic_cast<MTC_Slave*> (_slave)) != 0)) {
119 error << _("Ardour is slaved to MTC - port cannot be reset") << endmsg;
123 if (_mtc_port == 0) {
133 if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) {
134 error << string_compose (_("unknown port %1 requested for MTC"), port_tag) << endl;
140 if (_slave && ((ms = dynamic_cast<MTC_Slave*> (_slave)) != 0)) {
144 Config->set_mtc_port_name (port_tag);
147 MTC_PortChanged(); /* EMIT SIGNAL */
148 change_midi_ports ();
154 Session::set_mmc_receive_device_id (uint32_t device_id)
157 mmc->set_receive_device_id (device_id);
162 Session::set_mmc_send_device_id (uint32_t device_id)
165 mmc->set_send_device_id (device_id);
170 Session::set_mmc_port (string port_tag)
172 MIDI::byte old_recv_device_id = 0;
173 MIDI::byte old_send_device_id = 0;
174 bool reset_id = false;
176 if (port_tag.length() == 0) {
177 if (_mmc_port == 0) {
186 if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) {
193 old_recv_device_id = mmc->receive_device_id();
194 old_recv_device_id = mmc->send_device_id();
199 mmc = new MIDI::MachineControl (*_mmc_port, 1.0,
200 MMC_CommandSignature,
201 MMC_ResponseSignature);
204 mmc->set_receive_device_id (old_recv_device_id);
205 mmc->set_send_device_id (old_send_device_id);
209 (mem_fun (*this, &Session::mmc_deferred_play));
210 mmc->DeferredPlay.connect
211 (mem_fun (*this, &Session::mmc_deferred_play));
213 (mem_fun (*this, &Session::mmc_stop));
214 mmc->FastForward.connect
215 (mem_fun (*this, &Session::mmc_fast_forward));
217 (mem_fun (*this, &Session::mmc_rewind));
219 (mem_fun (*this, &Session::mmc_pause));
220 mmc->RecordPause.connect
221 (mem_fun (*this, &Session::mmc_record_pause));
222 mmc->RecordStrobe.connect
223 (mem_fun (*this, &Session::mmc_record_strobe));
224 mmc->RecordExit.connect
225 (mem_fun (*this, &Session::mmc_record_exit));
227 (mem_fun (*this, &Session::mmc_locate));
229 (mem_fun (*this, &Session::mmc_step));
231 (mem_fun (*this, &Session::mmc_shuttle));
232 mmc->TrackRecordStatusChange.connect
233 (mem_fun (*this, &Session::mmc_record_enable));
236 /* also handle MIDI SPP because its so common */
238 _mmc_port->input()->start.connect (mem_fun (*this, &Session::spp_start));
239 _mmc_port->input()->contineu.connect (mem_fun (*this, &Session::spp_continue));
240 _mmc_port->input()->stop.connect (mem_fun (*this, &Session::spp_stop));
242 Config->set_mmc_port_name (port_tag);
245 MMC_PortChanged(); /* EMIT SIGNAL */
246 change_midi_ports ();
252 Session::set_midi_port (string port_tag)
255 if (port_tag.length() == 0) {
256 if (_midi_port == 0) {
265 if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) {
271 /* XXX need something to forward this to control protocols ? or just
275 Config->set_midi_port_name (port_tag);
279 MIDI_PortChanged(); /* EMIT SIGNAL */
280 change_midi_ports ();
286 Session::set_midi_clock_port (string port_tag)
290 if (port_tag.length() == 0) {
292 if (_slave && ((ms = dynamic_cast<MIDIClock_Slave*> (_slave)) != 0)) {
293 error << _("Ardour is slaved to MIDI Clock - port cannot be reset") << endmsg;
297 if (_midi_clock_port == 0) {
301 _midi_clock_port = 0;
307 if ((port = MIDI::Manager::instance()->port (port_tag)) == 0) {
308 error << string_compose (_("unknown port %1 requested for MIDI Clock"), port_tag) << endl;
312 _midi_clock_port = port;
314 if (_slave && ((ms = dynamic_cast<MIDIClock_Slave*> (_slave)) != 0)) {
318 Config->set_midi_clock_port_name (port_tag);
321 MIDIClock_PortChanged(); /* EMIT SIGNAL */
322 change_midi_ports ();
328 Session::set_trace_midi_input (bool yn, MIDI::Port* port)
330 MIDI::Parser* input_parser;
332 cerr << "enabling tracing: " << yn << " for input port " << port->name() << endl;
335 if ((input_parser = port->input()) != 0) {
336 input_parser->trace (yn, &cout, "input: ");
341 if ((input_parser = _mmc_port->input()) != 0) {
342 input_parser->trace (yn, &cout, "input: ");
346 if (_mtc_port && _mtc_port != _mmc_port) {
347 if ((input_parser = _mtc_port->input()) != 0) {
348 input_parser->trace (yn, &cout, "input: ");
352 if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) {
353 if ((input_parser = _midi_port->input()) != 0) {
354 input_parser->trace (yn, &cout, "input: ");
359 && _midi_clock_port != _mmc_port
360 && _midi_clock_port != _mtc_port
361 && _midi_clock_port != _midi_port) {
362 if ((input_parser = _midi_clock_port->input()) != 0) {
363 input_parser->trace (yn, &cout, "input: ");
368 Config->set_trace_midi_input (yn);
372 Session::set_trace_midi_output (bool yn, MIDI::Port* port)
374 MIDI::Parser* output_parser;
377 if ((output_parser = port->output()) != 0) {
378 output_parser->trace (yn, &cout, "output: ");
382 if ((output_parser = _mmc_port->output()) != 0) {
383 output_parser->trace (yn, &cout, "output: ");
387 if (_mtc_port && _mtc_port != _mmc_port) {
388 if ((output_parser = _mtc_port->output()) != 0) {
389 output_parser->trace (yn, &cout, "output: ");
393 if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) {
394 if ((output_parser = _midi_port->output()) != 0) {
395 output_parser->trace (yn, &cout, "output: ");
401 Config->set_trace_midi_output (yn);
405 Session::get_trace_midi_input(MIDI::Port *port)
407 MIDI::Parser* input_parser;
409 if ((input_parser = port->input()) != 0) {
410 return input_parser->tracing();
415 if ((input_parser = _mmc_port->input()) != 0) {
416 return input_parser->tracing();
421 if ((input_parser = _mtc_port->input()) != 0) {
422 return input_parser->tracing();
427 if ((input_parser = _midi_port->input()) != 0) {
428 return input_parser->tracing();
437 Session::get_trace_midi_output(MIDI::Port *port)
439 MIDI::Parser* output_parser;
441 if ((output_parser = port->output()) != 0) {
442 return output_parser->tracing();
447 if ((output_parser = _mmc_port->output()) != 0) {
448 return output_parser->tracing();
453 if ((output_parser = _mtc_port->output()) != 0) {
454 return output_parser->tracing();
459 if ((output_parser = _midi_port->output()) != 0) {
460 return output_parser->tracing();
470 Session::setup_midi_control ()
472 outbound_mtc_smpte_frame = 0;
473 next_quarter_frame_to_send = 0;
475 /* setup the MMC buffer */
477 mmc_buffer[0] = 0xf0; // SysEx
478 mmc_buffer[1] = 0x7f; // Real Time SysEx ID for MMC
479 mmc_buffer[2] = (mmc ? mmc->send_device_id() : 0x7f);
480 mmc_buffer[3] = 0x6; // MCC
482 /* Set up the qtr frame message */
495 Session::spp_start (Parser& ignored, nframes_t timestamp)
497 if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) {
498 request_transport_speed (1.0);
503 Session::spp_continue (Parser& ignored, nframes_t timestamp)
505 spp_start (ignored, timestamp);
509 Session::spp_stop (Parser& ignored, nframes_t timestamp)
511 if (Config->get_mmc_control()) {
517 Session::midi_clock_start (Parser& ignored, nframes_t timestamp)
519 if (Config->get_slave_source() == MIDIClock) {
520 request_transport_speed (1.0);
525 Session::midi_clock_continue (Parser& parser, nframes_t timestamp)
527 midi_clock_start (parser, 0);
531 Session::midi_clock_stop (Parser& ignored, nframes_t timestamp)
533 if (Config->get_slave_source() == MIDIClock) {
540 Session::mmc_deferred_play (MIDI::MachineControl &mmc)
542 if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) {
543 request_transport_speed (1.0);
548 Session::mmc_record_pause (MIDI::MachineControl &mmc)
550 if (Config->get_mmc_control()) {
551 maybe_enable_record();
556 Session::mmc_record_strobe (MIDI::MachineControl &mmc)
558 if (!Config->get_mmc_control())
561 /* record strobe does an implicit "Play" command */
563 if (_transport_speed != 1.0) {
565 /* start_transport() will move from Enabled->Recording, so we
566 don't need to do anything here except enable recording.
567 its not the same as maybe_enable_record() though, because
568 that *can* switch to Recording, which we do not want.
571 save_state ("", true);
572 g_atomic_int_set (&_record_status, Enabled);
573 RecordStateChanged (); /* EMIT SIGNAL */
575 request_transport_speed (1.0);
584 Session::mmc_record_exit (MIDI::MachineControl &mmc)
586 if (Config->get_mmc_control()) {
587 disable_record (false);
592 Session::mmc_stop (MIDI::MachineControl &mmc)
594 if (Config->get_mmc_control()) {
600 Session::mmc_pause (MIDI::MachineControl &mmc)
602 if (Config->get_mmc_control()) {
604 /* We support RECORD_PAUSE, so the spec says that
605 we must interpret PAUSE like RECORD_PAUSE if
609 if (actively_recording()) {
610 maybe_enable_record ();
617 static bool step_queued = false;
620 Session::mmc_step (MIDI::MachineControl &mmc, int steps)
622 if (!Config->get_mmc_control()) {
627 struct timeval diff = { 0, 0 };
629 gettimeofday (&now, 0);
631 timersub (&now, &last_mmc_step, &diff);
633 gettimeofday (&now, 0);
634 timersub (&now, &last_mmc_step, &diff);
636 if (last_mmc_step.tv_sec != 0 && (diff.tv_usec + (diff.tv_sec * 1000000)) < _engine.usecs_per_cycle()) {
640 double diff_secs = diff.tv_sec + (diff.tv_usec / 1000000.0);
641 double cur_speed = (((steps * 0.5) * smpte_frames_per_second()) / diff_secs) / smpte_frames_per_second();
643 if (_transport_speed == 0 || cur_speed * _transport_speed < 0) {
644 /* change direction */
645 step_speed = cur_speed;
647 step_speed = (0.6 * step_speed) + (0.4 * cur_speed);
653 cerr << "delta = " << diff_secs
654 << " ct = " << _transport_speed
655 << " steps = " << steps
656 << " new speed = " << cur_speed
657 << " speed = " << step_speed
661 request_transport_speed (step_speed);
665 midi_timeouts.push_back (mem_fun (*this, &Session::mmc_step_timeout));
671 Session::mmc_rewind (MIDI::MachineControl &mmc)
673 if (Config->get_mmc_control()) {
674 request_transport_speed(-8.0f);
679 Session::mmc_fast_forward (MIDI::MachineControl &mmc)
681 if (Config->get_mmc_control()) {
682 request_transport_speed(8.0f);
687 Session::mmc_locate (MIDI::MachineControl &mmc, const MIDI::byte* mmc_tc)
689 if (!Config->get_mmc_control()) {
693 nframes_t target_frame;
696 smpte.hours = mmc_tc[0] & 0xf;
697 smpte.minutes = mmc_tc[1];
698 smpte.seconds = mmc_tc[2];
699 smpte.frames = mmc_tc[3];
700 smpte.rate = smpte_frames_per_second();
701 smpte.drop = smpte_drop_frames();
703 // Also takes smpte offset into account:
704 smpte_to_sample( smpte, target_frame, true /* use_offset */, false /* use_subframes */ );
706 if (target_frame > max_frames) {
707 target_frame = max_frames;
710 /* Some (all?) MTC/MMC devices do not send a full MTC frame
711 at the end of a locate, instead sending only an MMC
712 locate command. This causes the current position
713 of an MTC slave to become out of date. Catch this.
716 MTC_Slave* mtcs = dynamic_cast<MTC_Slave*> (_slave);
719 // cerr << "Locate *with* MTC slave\n";
720 mtcs->handle_locate (mmc_tc);
722 // cerr << "Locate without MTC slave\n";
723 request_locate (target_frame, false);
728 Session::mmc_shuttle (MIDI::MachineControl &mmc, float speed, bool forw)
730 if (!Config->get_mmc_control()) {
734 if (Config->get_shuttle_speed_threshold() >= 0 && speed > Config->get_shuttle_speed_threshold()) {
735 speed *= Config->get_shuttle_speed_factor();
739 request_transport_speed (speed);
741 request_transport_speed (-speed);
746 Session::mmc_record_enable (MIDI::MachineControl &mmc, size_t trk, bool enabled)
748 if (Config->get_mmc_control()) {
750 RouteList::iterator i;
751 boost::shared_ptr<RouteList> r = routes.reader();
753 for (i = r->begin(); i != r->end(); ++i) {
756 if ((at = dynamic_cast<AudioTrack*>((*i).get())) != 0) {
757 if (trk == at->remote_control_id()) {
758 at->set_record_enable (enabled, &mmc);
767 Session::change_midi_ports ()
769 MIDIRequest* request = new MIDIRequest;
771 request->type = MIDIRequest::PortChange;
772 midi_requests.write (&request, 1);
776 /** Send MTC Full Frame message (complete SMPTE time) for the start of this cycle.
777 * This resets the MTC code, the next quarter frame message that is sent will be
778 * the first one with the beginning of this cycle as the new start point.
782 Session::send_full_time_code(nframes_t nframes)
784 /* This function could easily send at a given frame offset, but would
785 * that be useful? Does ardour do sub-block accurate locating? [DR] */
790 _send_smpte_update = false;
792 if (_mtc_port == 0 || !session_send_mtc) {
796 // Get smpte time for this transport frame
797 sample_to_smpte(_transport_frame, smpte, true /* use_offset */, false /* no subframes */);
799 transmitting_smpte_time = smpte;
800 outbound_mtc_smpte_frame = _transport_frame;
802 // I don't understand this bit yet.. [DR]
803 if (((mtc_smpte_bits >> 5) != MIDI::MTC_25_FPS) && (transmitting_smpte_time.frames % 2)) {
804 // start MTC quarter frame transmission on an even frame
805 SMPTE::increment( transmitting_smpte_time );
806 outbound_mtc_smpte_frame += (nframes_t) _frames_per_smpte_frame;
809 // Compensate for audio latency
810 outbound_mtc_smpte_frame += _worst_output_latency;
812 next_quarter_frame_to_send = 0;
814 // Sync slave to the same SMPTE time as we are on
822 msg[5] = mtc_smpte_bits | smpte.hours;
823 msg[6] = smpte.minutes;
824 msg[7] = smpte.seconds;
825 msg[8] = smpte.frames;
827 cerr << "MTC: Sending full time code at " << outbound_mtc_smpte_frame << endl;
829 // Send message at offset 0, sent time is for the start of this cycle
830 if (_mtc_port->midimsg (msg, sizeof (msg), 0)) {
831 error << _("Session: could not send full MIDI time code") << endmsg;
839 /** Sends MTC (quarter-frame) messages for this cycle.
840 * Must be called exactly once per cycle from the audio thread. Realtime safe.
841 * This function assumes the state of full SMPTE is sane, eg. the slave is
842 * expecting quarter frame messages and has the right frame of reference (any
843 * full MTC SMPTE time messages that needed to be sent should have been sent
844 * earlier already this cycle by send_full_time_code)
847 Session::send_midi_time_code_for_cycle(nframes_t nframes)
849 assert (next_quarter_frame_to_send >= 0);
850 assert (next_quarter_frame_to_send <= 7);
852 if (_mtc_port == 0 || !session_send_mtc || transmitting_smpte_time.negative
853 /*|| (next_quarter_frame_to_send < 0)*/ ) {
854 // cerr << "(MTC) Not sending MTC\n";
858 /* Duration of one quarter frame */
859 nframes_t quarter_frame_duration = ((long) _frames_per_smpte_frame) >> 2;
861 // cerr << "(MTC) TR: " << _transport_frame << " - SF: " << outbound_mtc_smpte_frame
862 // << " - NQ: " << next_quarter_frame_to_send << " - FD" << quarter_frame_duration << endl;
864 // FIXME: this should always be true
865 //assert((outbound_mtc_smpte_frame + (next_quarter_frame_to_send * quarter_frame_duration))
866 // > _transport_frame);
869 // Send quarter frames for this cycle
870 while (_transport_frame + nframes > (outbound_mtc_smpte_frame +
871 (next_quarter_frame_to_send * quarter_frame_duration))) {
873 // cerr << "(MTC) Next frame to send: " << next_quarter_frame_to_send << endl;
875 switch (next_quarter_frame_to_send) {
877 mtc_msg[1] = 0x00 | (transmitting_smpte_time.frames & 0xf);
880 mtc_msg[1] = 0x10 | ((transmitting_smpte_time.frames & 0xf0) >> 4);
883 mtc_msg[1] = 0x20 | (transmitting_smpte_time.seconds & 0xf);
886 mtc_msg[1] = 0x30 | ((transmitting_smpte_time.seconds & 0xf0) >> 4);
889 mtc_msg[1] = 0x40 | (transmitting_smpte_time.minutes & 0xf);
892 mtc_msg[1] = 0x50 | ((transmitting_smpte_time.minutes & 0xf0) >> 4);
895 mtc_msg[1] = 0x60 | ((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf);
898 mtc_msg[1] = 0x70 | (((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf0) >> 4);
902 const nframes_t msg_time = (outbound_mtc_smpte_frame
903 + (quarter_frame_duration * next_quarter_frame_to_send));
905 // This message must fall within this block or something is broken
906 assert(msg_time >= _transport_frame);
907 assert(msg_time < _transport_frame + nframes);
909 nframes_t out_stamp = msg_time - _transport_frame;
910 assert(out_stamp < nframes);
912 if (_mtc_port->midimsg (mtc_msg, 2, out_stamp)) {
913 error << string_compose(_("Session: cannot send quarter-frame MTC message (%1)"), strerror (errno))
918 /*cerr << "(MTC) SMPTE: " << transmitting_smpte_time.hours
919 << ":" << transmitting_smpte_time.minutes
920 << ":" << transmitting_smpte_time.seconds
921 << ":" << transmitting_smpte_time.frames
922 << ", qfm = " << next_quarter_frame_to_send
923 << ", stamp = " << out_stamp
924 << ", delta = " << _transport_frame + out_stamp - last_time << endl;*/
926 // Increment quarter frame counter
927 next_quarter_frame_to_send++;
929 if (next_quarter_frame_to_send >= 8) {
930 // Wrap quarter frame counter
931 next_quarter_frame_to_send = 0;
932 // Increment smpte time twice
933 SMPTE::increment( transmitting_smpte_time );
934 SMPTE::increment( transmitting_smpte_time );
935 // Re-calculate timing of first quarter frame
936 //smpte_to_sample( transmitting_smpte_time, outbound_mtc_smpte_frame, true /* use_offset */, false );
937 outbound_mtc_smpte_frame += 8 * quarter_frame_duration;
938 // Compensate for audio latency
939 outbound_mtc_smpte_frame += _worst_output_latency;
946 /***********************************************************************
948 **********************************************************************/
951 Session::deliver_mmc (MIDI::MachineControl::Command cmd, nframes_t where)
953 using namespace MIDI;
957 if (_mmc_port == 0 || !session_send_mmc) {
958 // cerr << "Not delivering MMC " << _mmc_port << " - " << session_send_mmc << endl;
962 mmc_buffer[nbytes++] = cmd;
964 // cerr << "delivering MMC, cmd = " << hex << (int) cmd << dec << endl;
967 case MachineControl::cmdLocate:
968 smpte_time_subframes (where, smpte);
970 mmc_buffer[nbytes++] = 0x6; // byte count
971 mmc_buffer[nbytes++] = 0x1; // "TARGET" subcommand
972 mmc_buffer[nbytes++] = smpte.hours;
973 mmc_buffer[nbytes++] = smpte.minutes;
974 mmc_buffer[nbytes++] = smpte.seconds;
975 mmc_buffer[nbytes++] = smpte.frames;
976 mmc_buffer[nbytes++] = smpte.subframes;
979 case MachineControl::cmdStop:
982 case MachineControl::cmdPlay:
983 /* always convert Play into Deferred Play */
985 mmc_buffer[4] = MachineControl::cmdDeferredPlay;
988 case MachineControl::cmdDeferredPlay:
991 case MachineControl::cmdRecordStrobe:
994 case MachineControl::cmdRecordExit:
997 case MachineControl::cmdRecordPause:
1006 mmc_buffer[nbytes++] = 0xf7; // terminate SysEx/MMC message
1008 if (_mmc_port->midimsg (mmc_buffer, nbytes, 0)) {
1009 error << string_compose(_("MMC: cannot send command %1%2%3"), &hex, cmd, &dec) << endmsg;
1015 Session::mmc_step_timeout ()
1018 struct timeval diff;
1020 gettimeofday (&now, 0);
1022 timersub (&now, &last_mmc_step, &diff);
1023 diff_usecs = diff.tv_sec * 1000000 + diff.tv_usec;
1025 if (diff_usecs > 1000000.0 || fabs (_transport_speed) < 0.0000001) {
1026 /* too long or too slow, stop transport */
1027 request_transport_speed (0.0);
1028 step_queued = false;
1032 if (diff_usecs < 250000.0) {
1033 /* too short, just keep going */
1039 request_transport_speed (_transport_speed * 0.75);
1043 /*---------------------------------------------------------------------------
1045 ---------------------------------------------------------------------------*/
1048 Session::start_midi_thread ()
1050 if (pipe (midi_request_pipe)) {
1051 error << string_compose(_("Cannot create transport request signal pipe (%1)"), strerror (errno)) << endmsg;
1055 if (fcntl (midi_request_pipe[0], F_SETFL, O_NONBLOCK)) {
1056 error << string_compose(_("UI: cannot set O_NONBLOCK on " "signal read pipe (%1)"), strerror (errno)) << endmsg;
1060 if (fcntl (midi_request_pipe[1], F_SETFL, O_NONBLOCK)) {
1061 error << string_compose(_("UI: cannot set O_NONBLOCK on " "signal write pipe (%1)"), strerror (errno)) << endmsg;
1065 if (pthread_create_and_store ("transport", &midi_thread, 0, _midi_thread_work, this)) {
1066 error << _("Session: could not create transport thread") << endmsg;
1074 Session::terminate_midi_thread ()
1078 MIDIRequest* request = new MIDIRequest;
1081 request->type = MIDIRequest::Quit;
1083 midi_requests.write (&request, 1);
1084 poke_midi_thread ();
1086 pthread_join (midi_thread, &status);
1091 Session::poke_midi_thread ()
1095 if (write (midi_request_pipe[1], &c, 1) != 1) {
1096 error << string_compose(_("cannot send signal to midi thread! (%1)"), strerror (errno)) << endmsg;
1101 Session::_midi_thread_work (void* arg)
1103 pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
1104 pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
1106 ((Session *) arg)->midi_thread_work ();
1111 Session::midi_thread_work ()
1113 MIDIRequest* request;
1114 struct pollfd pfd[4];
1118 struct sched_param rtparam;
1121 vector<MIDI::Port*> ports;
1123 PBD::notify_gui_about_thread_creation (pthread_self(), X_("MIDI"), 2048);
1125 memset (&rtparam, 0, sizeof (rtparam));
1126 rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */
1128 if ((x = pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam)) != 0) {
1129 // do we care? not particularly.
1132 /* set up the port vector; 5 is the largest possible size for now */
1134 ports.assign (5, (MIDI::Port*) 0);
1140 pfd[nfds].fd = midi_request_pipe[0];
1141 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1144 if (Config->get_mmc_control() && _mmc_port && _mmc_port->selectable() >= 0) {
1145 pfd[nfds].fd = _mmc_port->selectable();
1146 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1147 ports[nfds] = _mmc_port;
1148 //cerr << "MIDI port " << nfds << " = MMC @ " << _mmc_port << endl;
1152 /* if MTC is being handled on a different port from MMC
1153 or we are not handling MMC at all, poll
1157 if (_mtc_port && (_mtc_port != _mmc_port || !Config->get_mmc_control()) && _mtc_port->selectable() >= 0) {
1158 pfd[nfds].fd = _mtc_port->selectable();
1159 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1160 ports[nfds] = _mtc_port;
1161 //cerr << "MIDI port " << nfds << " = MTC @ " << _mtc_port << endl;
1165 if (_midi_clock_port && (_midi_clock_port != _mmc_port || !Config->get_mmc_control()) && _midi_clock_port->selectable() >= 0) {
1166 pfd[nfds].fd = _midi_clock_port->selectable();
1167 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1168 ports[nfds] = _midi_clock_port;
1172 /* if we are using MMC control, we obviously have to listen
1176 if (_midi_port && (_midi_port != _mmc_port || !Config->get_mmc_control()) && (_midi_port != _mtc_port) && _midi_port->selectable() >= 0) {
1177 pfd[nfds].fd = _midi_port->selectable();
1178 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1179 ports[nfds] = _midi_port;
1180 // cerr << "MIDI port " << nfds << " = MIDI @ " << _midi_port << endl;
1184 if (!midi_timeouts.empty()) {
1185 timeout = 100; /* 10msecs */
1187 timeout = -1; /* if there is no data, we don't care */
1191 // cerr << "MIDI poll on " << nfds << " for " << timeout << endl;
1192 if (poll (pfd, nfds, timeout) < 0) {
1193 if (errno == EINTR) {
1194 /* gdb at work, perhaps */
1198 error << string_compose(_("MIDI thread poll failed (%1)"), strerror (errno)) << endmsg;
1202 // cerr << "MIDI thread wakes at " << get_cycles () << endl;
1206 /* check the transport request pipe */
1208 if (pfd[0].revents & ~POLLIN) {
1209 error << _("Error on transport thread request pipe") << endmsg;
1213 if (pfd[0].revents & POLLIN) {
1217 // cerr << "MIDI request FIFO ready\n";
1220 /* empty the pipe of all current requests */
1223 size_t nread = read (midi_request_pipe[0], &foo, sizeof (foo));
1226 if ((size_t) nread < sizeof (foo)) {
1231 } else if (nread == 0) {
1233 } else if (errno == EAGAIN) {
1236 fatal << _("Error reading from transport request pipe") << endmsg;
1241 while (midi_requests.read (&request, 1) == 1) {
1243 switch (request->type) {
1244 case MIDIRequest::PortChange:
1245 /* restart poll with new ports */
1246 // cerr << "rebind\n";
1250 case MIDIRequest::Quit:
1252 pthread_exit_pbd (0);
1270 /* now read the rest of the ports */
1272 for (int p = 1; p < nfds; ++p) {
1273 if ((pfd[p].revents & ~POLLIN)) {
1274 // error << string_compose(_("Transport: error polling MIDI port %1 (revents =%2%3%4"), p, &hex, pfd[p].revents, &dec) << endmsg;
1278 if (pfd[p].revents & POLLIN) {
1284 /* timeout driven */
1286 if (fds_ready < 2 && timeout != -1) {
1288 for (MidiTimeoutList::iterator i = midi_timeouts.begin(); i != midi_timeouts.end(); ) {
1290 MidiTimeoutList::iterator tmp;
1295 midi_timeouts.erase (i);