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);
320 _midi_clock_port->input()->start.connect (mem_fun (*this, &Session::midi_clock_start));
321 _midi_clock_port->input()->contineu.connect (mem_fun (*this, &Session::midi_clock_continue));
322 _midi_clock_port->input()->stop.connect (mem_fun (*this, &Session::midi_clock_stop));
325 MIDIClock_PortChanged(); /* EMIT SIGNAL */
326 change_midi_ports ();
332 Session::set_trace_midi_input (bool yn, MIDI::Port* port)
334 MIDI::Parser* input_parser;
337 if ((input_parser = port->input()) != 0) {
338 input_parser->trace (yn, &cout, "input: ");
343 if ((input_parser = _mmc_port->input()) != 0) {
344 input_parser->trace (yn, &cout, "input: ");
348 if (_mtc_port && _mtc_port != _mmc_port) {
349 if ((input_parser = _mtc_port->input()) != 0) {
350 input_parser->trace (yn, &cout, "input: ");
354 if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) {
355 if ((input_parser = _midi_port->input()) != 0) {
356 input_parser->trace (yn, &cout, "input: ");
361 Config->set_trace_midi_input (yn);
365 Session::set_trace_midi_output (bool yn, MIDI::Port* port)
367 MIDI::Parser* output_parser;
370 if ((output_parser = port->output()) != 0) {
371 output_parser->trace (yn, &cout, "output: ");
375 if ((output_parser = _mmc_port->output()) != 0) {
376 output_parser->trace (yn, &cout, "output: ");
380 if (_mtc_port && _mtc_port != _mmc_port) {
381 if ((output_parser = _mtc_port->output()) != 0) {
382 output_parser->trace (yn, &cout, "output: ");
386 if (_midi_port && _midi_port != _mmc_port && _midi_port != _mtc_port ) {
387 if ((output_parser = _midi_port->output()) != 0) {
388 output_parser->trace (yn, &cout, "output: ");
394 Config->set_trace_midi_output (yn);
398 Session::get_trace_midi_input(MIDI::Port *port)
400 MIDI::Parser* input_parser;
402 if ((input_parser = port->input()) != 0) {
403 return input_parser->tracing();
408 if ((input_parser = _mmc_port->input()) != 0) {
409 return input_parser->tracing();
414 if ((input_parser = _mtc_port->input()) != 0) {
415 return input_parser->tracing();
420 if ((input_parser = _midi_port->input()) != 0) {
421 return input_parser->tracing();
430 Session::get_trace_midi_output(MIDI::Port *port)
432 MIDI::Parser* output_parser;
434 if ((output_parser = port->output()) != 0) {
435 return output_parser->tracing();
440 if ((output_parser = _mmc_port->output()) != 0) {
441 return output_parser->tracing();
446 if ((output_parser = _mtc_port->output()) != 0) {
447 return output_parser->tracing();
452 if ((output_parser = _midi_port->output()) != 0) {
453 return output_parser->tracing();
463 Session::setup_midi_control ()
465 outbound_mtc_smpte_frame = 0;
466 next_quarter_frame_to_send = 0;
468 /* setup the MMC buffer */
470 mmc_buffer[0] = 0xf0; // SysEx
471 mmc_buffer[1] = 0x7f; // Real Time SysEx ID for MMC
472 mmc_buffer[2] = (mmc ? mmc->send_device_id() : 0x7f);
473 mmc_buffer[3] = 0x6; // MCC
475 /* Set up the qtr frame message */
488 Session::spp_start (Parser& ignored)
490 if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) {
491 request_transport_speed (1.0);
496 Session::spp_continue (Parser& ignored)
502 Session::spp_stop (Parser& ignored)
504 if (Config->get_mmc_control()) {
510 Session::midi_clock_start (Parser& ignored)
512 if (Config->get_midi_clock_control() && (Config->get_slave_source() == MIDIClock)) {
513 request_transport_speed (1.0);
518 Session::midi_clock_continue (Parser& ignored)
520 midi_clock_start (ignored);
524 Session::midi_clock_stop (Parser& ignored)
526 if (Config->get_midi_clock_control()) {
532 Session::mmc_deferred_play (MIDI::MachineControl &mmc)
534 if (Config->get_mmc_control() && (Config->get_slave_source() != MTC)) {
535 request_transport_speed (1.0);
540 Session::mmc_record_pause (MIDI::MachineControl &mmc)
542 if (Config->get_mmc_control()) {
543 maybe_enable_record();
548 Session::mmc_record_strobe (MIDI::MachineControl &mmc)
550 if (!Config->get_mmc_control())
553 /* record strobe does an implicit "Play" command */
555 if (_transport_speed != 1.0) {
557 /* start_transport() will move from Enabled->Recording, so we
558 don't need to do anything here except enable recording.
559 its not the same as maybe_enable_record() though, because
560 that *can* switch to Recording, which we do not want.
563 save_state ("", true);
564 g_atomic_int_set (&_record_status, Enabled);
565 RecordStateChanged (); /* EMIT SIGNAL */
567 request_transport_speed (1.0);
576 Session::mmc_record_exit (MIDI::MachineControl &mmc)
578 if (Config->get_mmc_control()) {
579 disable_record (false);
584 Session::mmc_stop (MIDI::MachineControl &mmc)
586 if (Config->get_mmc_control()) {
592 Session::mmc_pause (MIDI::MachineControl &mmc)
594 if (Config->get_mmc_control()) {
596 /* We support RECORD_PAUSE, so the spec says that
597 we must interpret PAUSE like RECORD_PAUSE if
601 if (actively_recording()) {
602 maybe_enable_record ();
609 static bool step_queued = false;
612 Session::mmc_step (MIDI::MachineControl &mmc, int steps)
614 if (!Config->get_mmc_control()) {
619 struct timeval diff = { 0, 0 };
621 gettimeofday (&now, 0);
623 timersub (&now, &last_mmc_step, &diff);
625 gettimeofday (&now, 0);
626 timersub (&now, &last_mmc_step, &diff);
628 if (last_mmc_step.tv_sec != 0 && (diff.tv_usec + (diff.tv_sec * 1000000)) < _engine.usecs_per_cycle()) {
632 double diff_secs = diff.tv_sec + (diff.tv_usec / 1000000.0);
633 double cur_speed = (((steps * 0.5) * smpte_frames_per_second()) / diff_secs) / smpte_frames_per_second();
635 if (_transport_speed == 0 || cur_speed * _transport_speed < 0) {
636 /* change direction */
637 step_speed = cur_speed;
639 step_speed = (0.6 * step_speed) + (0.4 * cur_speed);
645 cerr << "delta = " << diff_secs
646 << " ct = " << _transport_speed
647 << " steps = " << steps
648 << " new speed = " << cur_speed
649 << " speed = " << step_speed
653 request_transport_speed (step_speed);
657 midi_timeouts.push_back (mem_fun (*this, &Session::mmc_step_timeout));
663 Session::mmc_rewind (MIDI::MachineControl &mmc)
665 if (Config->get_mmc_control()) {
666 request_transport_speed(-8.0f);
671 Session::mmc_fast_forward (MIDI::MachineControl &mmc)
673 if (Config->get_mmc_control()) {
674 request_transport_speed(8.0f);
679 Session::mmc_locate (MIDI::MachineControl &mmc, const MIDI::byte* mmc_tc)
681 if (!Config->get_mmc_control()) {
685 nframes_t target_frame;
688 smpte.hours = mmc_tc[0] & 0xf;
689 smpte.minutes = mmc_tc[1];
690 smpte.seconds = mmc_tc[2];
691 smpte.frames = mmc_tc[3];
692 smpte.rate = smpte_frames_per_second();
693 smpte.drop = smpte_drop_frames();
695 // Also takes smpte offset into account:
696 smpte_to_sample( smpte, target_frame, true /* use_offset */, false /* use_subframes */ );
698 if (target_frame > max_frames) {
699 target_frame = max_frames;
702 /* Some (all?) MTC/MMC devices do not send a full MTC frame
703 at the end of a locate, instead sending only an MMC
704 locate command. This causes the current position
705 of an MTC slave to become out of date. Catch this.
708 MTC_Slave* mtcs = dynamic_cast<MTC_Slave*> (_slave);
711 // cerr << "Locate *with* MTC slave\n";
712 mtcs->handle_locate (mmc_tc);
714 // cerr << "Locate without MTC slave\n";
715 request_locate (target_frame, false);
720 Session::mmc_shuttle (MIDI::MachineControl &mmc, float speed, bool forw)
722 if (!Config->get_mmc_control()) {
726 if (Config->get_shuttle_speed_threshold() >= 0 && speed > Config->get_shuttle_speed_threshold()) {
727 speed *= Config->get_shuttle_speed_factor();
731 request_transport_speed (speed);
733 request_transport_speed (-speed);
738 Session::mmc_record_enable (MIDI::MachineControl &mmc, size_t trk, bool enabled)
740 if (Config->get_mmc_control()) {
742 RouteList::iterator i;
743 boost::shared_ptr<RouteList> r = routes.reader();
745 for (i = r->begin(); i != r->end(); ++i) {
748 if ((at = dynamic_cast<AudioTrack*>((*i).get())) != 0) {
749 if (trk == at->remote_control_id()) {
750 at->set_record_enable (enabled, &mmc);
759 Session::change_midi_ports ()
761 MIDIRequest* request = new MIDIRequest;
763 request->type = MIDIRequest::PortChange;
764 midi_requests.write (&request, 1);
768 /** Send MTC Full Frame message (complete SMPTE time) for the start of this cycle.
769 * This resets the MTC code, the next quarter frame message that is sent will be
770 * the first one with the beginning of this cycle as the new start point.
774 Session::send_full_time_code(nframes_t nframes)
776 /* This function could easily send at a given frame offset, but would
777 * that be useful? Does ardour do sub-block accurate locating? [DR] */
782 _send_smpte_update = false;
784 if (_mtc_port == 0 || !session_send_mtc) {
788 // Get smpte time for this transport frame
789 sample_to_smpte(_transport_frame, smpte, true /* use_offset */, false /* no subframes */);
791 transmitting_smpte_time = smpte;
792 outbound_mtc_smpte_frame = _transport_frame;
794 // I don't understand this bit yet.. [DR]
795 if (((mtc_smpte_bits >> 5) != MIDI::MTC_25_FPS) && (transmitting_smpte_time.frames % 2)) {
796 // start MTC quarter frame transmission on an even frame
797 SMPTE::increment( transmitting_smpte_time );
798 outbound_mtc_smpte_frame += (nframes_t) _frames_per_smpte_frame;
801 // Compensate for audio latency
802 outbound_mtc_smpte_frame += _worst_output_latency;
804 next_quarter_frame_to_send = 0;
806 // Sync slave to the same SMPTE time as we are on
814 msg[5] = mtc_smpte_bits | smpte.hours;
815 msg[6] = smpte.minutes;
816 msg[7] = smpte.seconds;
817 msg[8] = smpte.frames;
819 cerr << "MTC: Sending full time code at " << outbound_mtc_smpte_frame << endl;
821 // Send message at offset 0, sent time is for the start of this cycle
822 if (_mtc_port->midimsg (msg, sizeof (msg), 0)) {
823 error << _("Session: could not send full MIDI time code") << endmsg;
831 /** Sends MTC (quarter-frame) messages for this cycle.
832 * Must be called exactly once per cycle from the audio thread. Realtime safe.
833 * This function assumes the state of full SMPTE is sane, eg. the slave is
834 * expecting quarter frame messages and has the right frame of reference (any
835 * full MTC SMPTE time messages that needed to be sent should have been sent
836 * earlier already this cycle by send_full_time_code)
839 Session::send_midi_time_code_for_cycle(nframes_t nframes)
841 assert (next_quarter_frame_to_send >= 0);
842 assert (next_quarter_frame_to_send <= 7);
844 if (_mtc_port == 0 || !session_send_mtc || transmitting_smpte_time.negative
845 /*|| (next_quarter_frame_to_send < 0)*/ ) {
846 // cerr << "(MTC) Not sending MTC\n";
850 /* Duration of one quarter frame */
851 nframes_t quarter_frame_duration = ((long) _frames_per_smpte_frame) >> 2;
853 // cerr << "(MTC) TR: " << _transport_frame << " - SF: " << outbound_mtc_smpte_frame
854 // << " - NQ: " << next_quarter_frame_to_send << " - FD" << quarter_frame_duration << endl;
856 // FIXME: this should always be true
857 //assert((outbound_mtc_smpte_frame + (next_quarter_frame_to_send * quarter_frame_duration))
858 // > _transport_frame);
861 // Send quarter frames for this cycle
862 while (_transport_frame + nframes > (outbound_mtc_smpte_frame +
863 (next_quarter_frame_to_send * quarter_frame_duration))) {
865 // cerr << "(MTC) Next frame to send: " << next_quarter_frame_to_send << endl;
867 switch (next_quarter_frame_to_send) {
869 mtc_msg[1] = 0x00 | (transmitting_smpte_time.frames & 0xf);
872 mtc_msg[1] = 0x10 | ((transmitting_smpte_time.frames & 0xf0) >> 4);
875 mtc_msg[1] = 0x20 | (transmitting_smpte_time.seconds & 0xf);
878 mtc_msg[1] = 0x30 | ((transmitting_smpte_time.seconds & 0xf0) >> 4);
881 mtc_msg[1] = 0x40 | (transmitting_smpte_time.minutes & 0xf);
884 mtc_msg[1] = 0x50 | ((transmitting_smpte_time.minutes & 0xf0) >> 4);
887 mtc_msg[1] = 0x60 | ((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf);
890 mtc_msg[1] = 0x70 | (((mtc_smpte_bits|transmitting_smpte_time.hours) & 0xf0) >> 4);
894 const nframes_t msg_time = (outbound_mtc_smpte_frame
895 + (quarter_frame_duration * next_quarter_frame_to_send));
897 // This message must fall within this block or something is broken
898 assert(msg_time >= _transport_frame);
899 assert(msg_time < _transport_frame + nframes);
901 nframes_t out_stamp = msg_time - _transport_frame;
902 assert(out_stamp < nframes);
904 if (_mtc_port->midimsg (mtc_msg, 2, out_stamp)) {
905 error << string_compose(_("Session: cannot send quarter-frame MTC message (%1)"), strerror (errno))
910 /*cerr << "(MTC) SMPTE: " << transmitting_smpte_time.hours
911 << ":" << transmitting_smpte_time.minutes
912 << ":" << transmitting_smpte_time.seconds
913 << ":" << transmitting_smpte_time.frames
914 << ", qfm = " << next_quarter_frame_to_send
915 << ", stamp = " << out_stamp
916 << ", delta = " << _transport_frame + out_stamp - last_time << endl;*/
918 // Increment quarter frame counter
919 next_quarter_frame_to_send++;
921 if (next_quarter_frame_to_send >= 8) {
922 // Wrap quarter frame counter
923 next_quarter_frame_to_send = 0;
924 // Increment smpte time twice
925 SMPTE::increment( transmitting_smpte_time );
926 SMPTE::increment( transmitting_smpte_time );
927 // Re-calculate timing of first quarter frame
928 //smpte_to_sample( transmitting_smpte_time, outbound_mtc_smpte_frame, true /* use_offset */, false );
929 outbound_mtc_smpte_frame += 8 * quarter_frame_duration;
930 // Compensate for audio latency
931 outbound_mtc_smpte_frame += _worst_output_latency;
938 /***********************************************************************
940 **********************************************************************/
943 Session::deliver_mmc (MIDI::MachineControl::Command cmd, nframes_t where)
945 using namespace MIDI;
949 if (_mmc_port == 0 || !session_send_mmc) {
950 // cerr << "Not delivering MMC " << _mmc_port << " - " << session_send_mmc << endl;
954 mmc_buffer[nbytes++] = cmd;
956 // cerr << "delivering MMC, cmd = " << hex << (int) cmd << dec << endl;
959 case MachineControl::cmdLocate:
960 smpte_time_subframes (where, smpte);
962 mmc_buffer[nbytes++] = 0x6; // byte count
963 mmc_buffer[nbytes++] = 0x1; // "TARGET" subcommand
964 mmc_buffer[nbytes++] = smpte.hours;
965 mmc_buffer[nbytes++] = smpte.minutes;
966 mmc_buffer[nbytes++] = smpte.seconds;
967 mmc_buffer[nbytes++] = smpte.frames;
968 mmc_buffer[nbytes++] = smpte.subframes;
971 case MachineControl::cmdStop:
974 case MachineControl::cmdPlay:
975 /* always convert Play into Deferred Play */
977 mmc_buffer[4] = MachineControl::cmdDeferredPlay;
980 case MachineControl::cmdDeferredPlay:
983 case MachineControl::cmdRecordStrobe:
986 case MachineControl::cmdRecordExit:
989 case MachineControl::cmdRecordPause:
998 mmc_buffer[nbytes++] = 0xf7; // terminate SysEx/MMC message
1000 if (_mmc_port->midimsg (mmc_buffer, nbytes, 0)) {
1001 error << string_compose(_("MMC: cannot send command %1%2%3"), &hex, cmd, &dec) << endmsg;
1007 Session::mmc_step_timeout ()
1010 struct timeval diff;
1012 gettimeofday (&now, 0);
1014 timersub (&now, &last_mmc_step, &diff);
1015 diff_usecs = diff.tv_sec * 1000000 + diff.tv_usec;
1017 if (diff_usecs > 1000000.0 || fabs (_transport_speed) < 0.0000001) {
1018 /* too long or too slow, stop transport */
1019 request_transport_speed (0.0);
1020 step_queued = false;
1024 if (diff_usecs < 250000.0) {
1025 /* too short, just keep going */
1031 request_transport_speed (_transport_speed * 0.75);
1035 /*---------------------------------------------------------------------------
1037 ---------------------------------------------------------------------------*/
1040 Session::start_midi_thread ()
1042 if (pipe (midi_request_pipe)) {
1043 error << string_compose(_("Cannot create transport request signal pipe (%1)"), strerror (errno)) << endmsg;
1047 if (fcntl (midi_request_pipe[0], F_SETFL, O_NONBLOCK)) {
1048 error << string_compose(_("UI: cannot set O_NONBLOCK on " "signal read pipe (%1)"), strerror (errno)) << endmsg;
1052 if (fcntl (midi_request_pipe[1], F_SETFL, O_NONBLOCK)) {
1053 error << string_compose(_("UI: cannot set O_NONBLOCK on " "signal write pipe (%1)"), strerror (errno)) << endmsg;
1057 if (pthread_create_and_store ("transport", &midi_thread, 0, _midi_thread_work, this)) {
1058 error << _("Session: could not create transport thread") << endmsg;
1066 Session::terminate_midi_thread ()
1070 MIDIRequest* request = new MIDIRequest;
1073 request->type = MIDIRequest::Quit;
1075 midi_requests.write (&request, 1);
1076 poke_midi_thread ();
1078 pthread_join (midi_thread, &status);
1083 Session::poke_midi_thread ()
1087 if (write (midi_request_pipe[1], &c, 1) != 1) {
1088 error << string_compose(_("cannot send signal to midi thread! (%1)"), strerror (errno)) << endmsg;
1093 Session::_midi_thread_work (void* arg)
1095 pthread_setcancelstate (PTHREAD_CANCEL_ENABLE, 0);
1096 pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, 0);
1098 ((Session *) arg)->midi_thread_work ();
1103 Session::midi_thread_work ()
1105 MIDIRequest* request;
1106 struct pollfd pfd[4];
1110 struct sched_param rtparam;
1113 vector<MIDI::Port*> ports;
1115 PBD::ThreadCreatedWithRequestSize (pthread_self(), X_("MIDI"), 2048);
1117 memset (&rtparam, 0, sizeof (rtparam));
1118 rtparam.sched_priority = 9; /* XXX should be relative to audio (JACK) thread */
1120 if ((x = pthread_setschedparam (pthread_self(), SCHED_FIFO, &rtparam)) != 0) {
1121 // do we care? not particularly.
1124 /* set up the port vector; 5 is the largest possible size for now */
1126 ports.assign (5, (MIDI::Port*) 0);
1132 pfd[nfds].fd = midi_request_pipe[0];
1133 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1136 if (Config->get_mmc_control() && _mmc_port && _mmc_port->selectable() >= 0) {
1137 pfd[nfds].fd = _mmc_port->selectable();
1138 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1139 ports[nfds] = _mmc_port;
1143 /* if MTC is being handled on a different port from MMC
1144 or we are not handling MMC at all, poll
1148 if (_mtc_port && (_mtc_port != _mmc_port || !Config->get_mmc_control()) && _mtc_port->selectable() >= 0) {
1149 pfd[nfds].fd = _mtc_port->selectable();
1150 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1151 ports[nfds] = _mtc_port;
1155 cerr << "before handling midi clock port" << endl;
1156 if (_midi_clock_port && (_midi_clock_port != _mmc_port || !Config->get_mmc_control()) && _midi_clock_port->selectable() >= 0) {
1157 cerr << "inside handling midi clock port" << endl;
1158 pfd[nfds].fd = _midi_clock_port->selectable();
1159 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1160 ports[nfds] = _midi_clock_port;
1164 /* if we are using MMC control, we obviously have to listen
1168 if (_midi_port && (_midi_port != _mmc_port || !Config->get_mmc_control()) && (_midi_port != _mtc_port) && _midi_port->selectable() >= 0) {
1169 pfd[nfds].fd = _midi_port->selectable();
1170 pfd[nfds].events = POLLIN|POLLHUP|POLLERR;
1171 ports[nfds] = _midi_port;
1175 if (!midi_timeouts.empty()) {
1176 timeout = 100; /* 10msecs */
1178 timeout = -1; /* if there is no data, we don't care */
1182 // cerr << "MIDI poll on " << nfds << " for " << timeout << endl;
1183 if (poll (pfd, nfds, timeout) < 0) {
1184 if (errno == EINTR) {
1185 /* gdb at work, perhaps */
1189 error << string_compose(_("MIDI thread poll failed (%1)"), strerror (errno)) << endmsg;
1193 // cerr << "MIDI thread wakes at " << get_cycles () << endl;
1197 /* check the transport request pipe */
1199 if (pfd[0].revents & ~POLLIN) {
1200 error << _("Error on transport thread request pipe") << endmsg;
1204 if (pfd[0].revents & POLLIN) {
1208 // cerr << "MIDI request FIFO ready\n";
1211 /* empty the pipe of all current requests */
1214 size_t nread = read (midi_request_pipe[0], &foo, sizeof (foo));
1217 if ((size_t) nread < sizeof (foo)) {
1222 } else if (nread == 0) {
1224 } else if (errno == EAGAIN) {
1227 fatal << _("Error reading from transport request pipe") << endmsg;
1232 while (midi_requests.read (&request, 1) == 1) {
1234 switch (request->type) {
1235 case MIDIRequest::PortChange:
1236 /* restart poll with new ports */
1237 // cerr << "rebind\n";
1241 case MIDIRequest::Quit:
1243 pthread_exit_pbd (0);
1261 /* now read the rest of the ports */
1263 for (int p = 1; p < nfds; ++p) {
1264 if ((pfd[p].revents & ~POLLIN)) {
1265 // error << string_compose(_("Transport: error polling MIDI port %1 (revents =%2%3%4"), p, &hex, pfd[p].revents, &dec) << endmsg;
1269 if (pfd[p].revents & POLLIN) {
1275 /* timeout driven */
1277 if (fds_ready < 2 && timeout != -1) {
1279 for (MidiTimeoutList::iterator i = midi_timeouts.begin(); i != midi_timeouts.end(); ) {
1281 MidiTimeoutList::iterator tmp;
1286 midi_timeouts.erase (i);