2 Copyright (C) 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.
27 #include <glibmm/timer.h>
28 #include <pbd/pthread_utils.h>
29 #include <pbd/stacktrace.h>
30 #include <pbd/unknown_type.h>
32 #include <midi++/jack.h>
34 #include <ardour/audioengine.h>
35 #include <ardour/buffer.h>
36 #include <ardour/port.h>
37 #include <ardour/jack_audio_port.h>
38 #include <ardour/jack_midi_port.h>
39 #include <ardour/audio_port.h>
40 #include <ardour/session.h>
41 #include <ardour/cycle_timer.h>
42 #include <ardour/utils.h>
47 #include <ardour/timestamps.h>
52 using namespace ARDOUR;
55 gint AudioEngine::m_meter_exit;
58 ardour_jack_error (const char* msg)
60 error << "JACK: " << msg << endmsg;
63 AudioEngine::AudioEngine (string client_name)
67 session_remove_pending = false;
70 last_monitor_check = 0;
71 monitor_check_interval = max_frames;
72 _processed_frames = 0;
77 _freewheel_thread_registered = false;
78 _freewheeling = false;
81 g_atomic_int_set (&m_meter_exit, 0);
83 if (connect_to_jack (client_name)) {
84 throw NoBackendAvailable ();
87 Port::set_engine (this);
90 AudioEngine::~AudioEngine ()
93 Glib::Mutex::Lock tm (_process_lock);
94 session_removed.signal ();
97 jack_client_close (_jack);
101 stop_metering_thread ();
106 AudioEngine::jack() const
112 _thread_init_callback (void *arg)
114 /* make sure that anybody who needs to know about this thread
118 PBD::ThreadCreatedWithRequestSize (pthread_self(), X_("Audioengine"), 4096);
119 MIDI::JACK_MidiPort::set_process_thread (pthread_self());
123 AudioEngine::start ()
126 error << _("AudioEngine::start() called while disconnected from JACK") << endmsg;
133 nframes_t blocksize = jack_get_buffer_size (_jack);
135 BootMessage (_("Connect session to engine"));
137 session->set_block_size (blocksize);
138 session->set_frame_rate (jack_get_sample_rate (_jack));
140 /* page in as much of the session process code as we
141 can before we really start running.
144 session->process (blocksize);
145 session->process (blocksize);
146 session->process (blocksize);
147 session->process (blocksize);
148 session->process (blocksize);
149 session->process (blocksize);
150 session->process (blocksize);
151 session->process (blocksize);
154 _processed_frames = 0;
155 last_monitor_check = 0;
157 jack_on_shutdown (_jack, halted, this);
158 jack_set_graph_order_callback (_jack, _graph_order_callback, this);
159 jack_set_thread_init_callback (_jack, _thread_init_callback, this);
160 jack_set_process_callback (_jack, _process_callback, this);
161 jack_set_sample_rate_callback (_jack, _sample_rate_callback, this);
162 jack_set_buffer_size_callback (_jack, _bufsize_callback, this);
163 jack_set_xrun_callback (_jack, _xrun_callback, this);
164 jack_set_sync_callback (_jack, _jack_sync_callback, this);
165 jack_set_freewheel_callback (_jack, _freewheel_callback, this);
167 if (Config->get_jack_time_master()) {
168 jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
171 if (jack_activate (_jack) == 0) {
174 Running(); /* EMIT SIGNAL */
176 // error << _("cannot activate JACK client") << endmsg;
179 start_metering_thread();
182 return _running ? 0 : -1;
186 AudioEngine::stop (bool forever)
190 disconnect_from_jack ();
192 jack_deactivate (_jack);
193 Stopped(); /* EMIT SIGNAL */
197 return _running ? -1 : 0;
202 AudioEngine::get_sync_offset (nframes_t& offset) const
205 #ifdef HAVE_JACK_VIDEO_SUPPORT
210 (void) jack_transport_query (_jack, &pos);
212 if (pos.valid & JackVideoFrameOffset) {
213 offset = pos.video_offset;
224 AudioEngine::_jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
225 jack_position_t* pos, int new_position, void *arg)
227 static_cast<AudioEngine*> (arg)->jack_timebase_callback (state, nframes, pos, new_position);
231 AudioEngine::jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
232 jack_position_t* pos, int new_position)
234 if (_jack && session && session->synced_to_jack()) {
235 session->jack_timebase_callback (state, nframes, pos, new_position);
240 AudioEngine::_jack_sync_callback (jack_transport_state_t state, jack_position_t* pos, void* arg)
242 return static_cast<AudioEngine*> (arg)->jack_sync_callback (state, pos);
246 AudioEngine::jack_sync_callback (jack_transport_state_t state, jack_position_t* pos)
248 if (_jack && session) {
249 return session->jack_sync_callback (state, pos);
256 AudioEngine::_xrun_callback (void *arg)
258 AudioEngine* ae = static_cast<AudioEngine*> (arg);
259 if (ae->connected()) {
260 ae->Xrun (); /* EMIT SIGNAL */
266 AudioEngine::_graph_order_callback (void *arg)
268 AudioEngine* ae = static_cast<AudioEngine*> (arg);
269 if (ae->connected()) {
270 ae->GraphReordered (); /* EMIT SIGNAL */
275 /** Wrapped which is called by JACK as its process callback. It is just
276 * here to get us back into C++ land by calling AudioEngine::process_callback()
277 * @param nframes Number of frames passed by JACK.
278 * @param arg User argument passed by JACK, which will be the AudioEngine*.
281 AudioEngine::_process_callback (nframes_t nframes, void *arg)
283 return static_cast<AudioEngine *> (arg)->process_callback (nframes);
287 AudioEngine::_freewheel_callback (int onoff, void *arg)
289 static_cast<AudioEngine*>(arg)->_freewheeling = onoff;
292 /** Method called by JACK (via _process_callback) which says that there
293 * is work to be done.
294 * @param nframes Number of frames to process.
297 AudioEngine::process_callback (nframes_t nframes)
299 // CycleTimer ct ("AudioEngine::process");
300 Glib::Mutex::Lock tm (_process_lock, Glib::TRY_LOCK);
302 /// The number of frames that will have been processed when we've finished
303 nframes_t next_processed_frames;
305 /* handle wrap around of total frames counter */
307 if (max_frames - _processed_frames < nframes) {
308 next_processed_frames = nframes - (max_frames - _processed_frames);
310 next_processed_frames = _processed_frames + nframes;
313 if (!tm.locked() || session == 0) {
314 /* return having done nothing */
315 _processed_frames = next_processed_frames;
319 if (session_remove_pending) {
320 /* perform the actual session removal */
322 session_remove_pending = false;
323 session_removed.signal();
324 _processed_frames = next_processed_frames;
328 boost::shared_ptr<Ports> p = ports.reader();
330 // Prepare ports (ie read data if necessary)
331 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
332 (*i)->cycle_start (nframes, 0);
336 /* emit the Freewheel signal and stop freewheeling in the event of trouble */
337 if (Freewheel (nframes)) {
338 jack_set_freewheel (_jack, false);
343 session->process (nframes);
347 // Finalize ports (ie write data if necessary)
349 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
350 (*i)->cycle_end (nframes, 0);
358 _processed_frames = next_processed_frames;
362 if (last_monitor_check + monitor_check_interval < next_processed_frames) {
364 boost::shared_ptr<Ports> p = ports.reader();
366 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
371 if (port->_last_monitor != (x = port->monitoring_input ())) {
372 port->_last_monitor = x;
373 /* XXX I think this is dangerous, due to
374 a likely mutex in the signal handlers ...
376 port->MonitorInputChanged (x); /* EMIT SIGNAL */
379 last_monitor_check = next_processed_frames;
382 if (session->silent()) {
384 boost::shared_ptr<Ports> p = ports.reader();
386 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
390 if (port->sends_output()) {
391 port->get_buffer().silence(nframes);
396 _processed_frames = next_processed_frames;
401 AudioEngine::_sample_rate_callback (nframes_t nframes, void *arg)
403 return static_cast<AudioEngine *> (arg)->jack_sample_rate_callback (nframes);
407 AudioEngine::jack_sample_rate_callback (nframes_t nframes)
409 _frame_rate = nframes;
410 _usecs_per_cycle = (int) floor ((((double) frames_per_cycle() / nframes)) * 1000000.0);
412 /* check for monitor input change every 1/10th of second */
414 monitor_check_interval = nframes / 10;
415 last_monitor_check = 0;
418 session->set_frame_rate (nframes);
421 SampleRateChanged (nframes); /* EMIT SIGNAL */
427 AudioEngine::_bufsize_callback (nframes_t nframes, void *arg)
429 return static_cast<AudioEngine *> (arg)->jack_bufsize_callback (nframes);
433 AudioEngine::jack_bufsize_callback (nframes_t nframes)
435 _buffer_size = nframes;
436 _usecs_per_cycle = (int) floor ((((double) nframes / frame_rate())) * 1000000.0);
437 last_monitor_check = 0;
439 boost::shared_ptr<Ports> p = ports.reader();
441 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
446 session->set_block_size (_buffer_size);
453 AudioEngine::stop_metering_thread ()
455 if (m_meter_thread) {
456 g_atomic_int_set (&m_meter_exit, 1);
457 m_meter_thread->join ();
463 AudioEngine::start_metering_thread ()
465 if (m_meter_thread == 0) {
466 g_atomic_int_set (&m_meter_exit, 0);
467 m_meter_thread = Glib::Thread::create (sigc::mem_fun(this, &AudioEngine::meter_thread),
468 500000, true, true, Glib::THREAD_PRIORITY_NORMAL);
473 AudioEngine::meter_thread ()
476 Glib::usleep (10000); /* 1/100th sec interval */
477 if (g_atomic_int_get(&m_meter_exit)) {
480 IO::update_meters ();
485 AudioEngine::set_session (Session *s)
487 Glib::Mutex::Lock pl (_process_lock);
493 nframes_t blocksize = jack_get_buffer_size (_jack);
495 /* page in as much of the session process code as we
496 can before we really start running.
499 boost::shared_ptr<Ports> p = ports.reader();
501 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
502 (*i)->cycle_start (blocksize, 0);
505 s->process (blocksize);
506 s->process (blocksize);
507 s->process (blocksize);
508 s->process (blocksize);
509 s->process (blocksize);
510 s->process (blocksize);
511 s->process (blocksize);
512 s->process (blocksize);
514 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
515 (*i)->cycle_end (blocksize, 0);
521 AudioEngine::remove_session ()
523 Glib::Mutex::Lock lm (_process_lock);
528 session_remove_pending = true;
529 session_removed.wait(_process_lock);
536 //FIXME: Preliminary bugfix for http://tracker.ardour.org/view.php?id=1985
537 //remove_all_ports ();
541 AudioEngine::port_registration_failure (const std::string& portname)
543 string full_portname = jack_client_name;
544 full_portname += ':';
545 full_portname += portname;
548 jack_port_t* p = jack_port_by_name (_jack, full_portname.c_str());
552 reason = _("a port with this name already exists: check for duplicated track/bus names");
554 reason = _("unknown error");
557 throw PortRegistrationFailure (string_compose (_("AudioEngine: cannot register port \"%1\": %2"), portname, reason).c_str());
561 AudioEngine::register_port (DataType dtype, const string& portname, bool input, bool publish)
565 /*cerr << "trying to register port with name " << portname << endl;*/
567 if (dtype == DataType::AUDIO) {
568 newport = new AudioPort (portname, (input ? Port::IsInput : Port::IsOutput), publish, frames_per_cycle());
569 } else if (dtype == DataType::MIDI) {
570 newport = new MidiPort (portname, (input ? Port::IsInput : Port::IsOutput), publish, frames_per_cycle());
572 throw unknown_type();
575 /*cerr << "successfully got port " << portname << " with address " << newport << endl;*/
577 RCUWriter<Ports> writer (ports);
578 boost::shared_ptr<Ports> ps = writer.get_copy ();
579 /*cerr << "Address of ports list: " << ps << endl
580 << "Ports set size before insert: " << ps->size() << endl;*/
581 ps->insert (ps->begin(), newport);
582 /*cerr << "Ports set size after insert: " << ps->size() << endl;*/
584 /* writer goes out of scope, forces update */
590 throw PortRegistrationFailure("unable to create port (unknown type?)");
595 AudioEngine::get_port (const std::string& full_name)
597 boost::shared_ptr<Ports> p = ports.reader();
599 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
600 //cerr << "comparing port name '" << (*i)->name() << "' with '" << full_name << "'" << endl;
601 if ((*i)->name() == full_name) {
610 AudioEngine::register_input_port (DataType type, const string& portname, bool publish)
612 return register_port (type, portname, true, publish);
616 AudioEngine::register_output_port (DataType type, const string& portname, bool publish)
618 return register_port (type, portname, false, publish);
622 AudioEngine::unregister_port (Port& port)
624 /* caller must hold process lock */
626 cerr << "about to unregister Port xx x" << &port << "\n";
629 /* probably happening when the engine has been halted by JACK,
630 in which case, there is nothing we can do here.
632 cerr << "not running\n";
637 cerr << "before getcopy\n";
639 RCUWriter<Ports> writer (ports);
640 boost::shared_ptr<Ports> ps = writer.get_copy ();
642 cerr << "Ports set size: " << ps.get()->size() << endl;
644 for (Ports::iterator i = ps->begin(); i != ps->end(); ++i) {
645 cerr << "before delete" << endl;
647 cerr << "About to delete " << &port << endl;
650 cerr << "After erasing ports size: " << ps->size();
655 /* writer goes out of scope, forces update */
658 cerr << "before remove_connections\n";
659 remove_connections_for (port);
665 AudioEngine::connect (const string& source, const string& destination)
671 fatal << _("connect called before engine was started") << endmsg;
678 string s = make_port_name_non_relative (source);
679 string d = make_port_name_non_relative (destination);
681 //cerr << "Trying to connect source: " << s << " with destination " << d << endl;
683 Port* src = get_port (s);
684 Port* dst = get_port (d);
688 /* both ports are known to us, so do the internal connect stuff */
690 if ((ret = src->connect (*dst)) == 0) {
691 ret = dst->connect (*src);
694 } else if (src || dst) {
696 /* one port is known to us, try to connect it to something external */
698 PortConnectableByName* pcn;
702 pcn = dynamic_cast<PortConnectableByName*>(src);
705 pcn = dynamic_cast<PortConnectableByName*>(dst);
710 ret = pcn->connect (other);
717 /* neither port is known to us, and this API isn't intended for use as a general patch bay */
724 error << string_compose(_("AudioEngine: connection already exists: %1 (%2) to %3 (%4)"),
725 source, s, destination, d)
727 } else if (ret < 0) {
728 error << string_compose(_("AudioEngine: cannot connect %1 (%2) to %3 (%4)"),
729 source, s, destination, d)
737 AudioEngine::disconnect (const string& source, const string& destination)
743 fatal << _("disconnect called before engine was started") << endmsg;
750 string s = make_port_name_non_relative (source);
751 string d = make_port_name_non_relative (destination);
753 //cerr << "trying to disconnect port '" << s << "' from port '" << d << endl;
755 Port* src = get_port (s);
756 Port* dst = get_port (d);
760 /* both ports are known to us, so do the internal connect stuff */
762 if ((ret = src->disconnect (*dst)) == 0) {
763 ret = dst->disconnect (*src);
766 } else if (src || dst) {
768 /* one port is known to us, try to connect it to something external */
771 PortConnectableByName* pcn;
775 pcn = dynamic_cast<PortConnectableByName*>(src);
778 pcn = dynamic_cast<PortConnectableByName*>(dst);
783 ret = pcn->disconnect (other);
790 /* neither port is known to us, and this API isn't intended for use as a general patch bay */
800 AudioEngine::disconnect (Port& port)
804 fatal << _("disconnect called before engine was started") << endmsg;
811 return port.disconnect_all ();
815 AudioEngine::frame_rate ()
818 if (_frame_rate == 0) {
819 return (_frame_rate = jack_get_sample_rate (_jack));
824 fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK")
832 AudioEngine::frames_per_cycle ()
835 if (_buffer_size == 0) {
836 return (_buffer_size = jack_get_buffer_size (_jack));
841 fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK")
848 /** Get a port by name.
849 * Note this can return NULL, it will NOT create a port if it is not found (any more).
852 AudioEngine::get_port_by_name (const string& portname, bool keep)
854 Glib::Mutex::Lock lm (_process_lock);
858 fatal << _("get_port_by_name() called before engine was started") << endmsg;
865 boost::shared_ptr<Ports> pr = ports.reader();
867 for (Ports::iterator i = pr->begin(); i != pr->end(); ++i) {
868 if (portname == (*i)->name()) {
877 AudioEngine::get_ports (const string& port_name_pattern, const string& type_name_pattern, uint32_t flags)
881 fatal << _("get_ports called before engine was started") << endmsg;
887 return jack_get_ports (_jack, port_name_pattern.c_str(), type_name_pattern.c_str(), flags);
891 AudioEngine::halted (void *arg)
893 AudioEngine* ae = static_cast<AudioEngine *> (arg);
894 bool was_running = ae->_running;
896 ae->stop_metering_thread ();
898 ae->_running = false;
899 ae->_buffer_size = 0;
902 cerr << "!!! HALTED !!!\n";
905 ae->Halted(); /* EMIT SIGNAL */
910 AudioEngine::can_request_hardware_monitoring ()
918 if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortCanMonitor)) == 0) {
929 AudioEngine::n_physical_outputs (DataType type) const
938 if ((ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsInput)) == 0) {
942 for (i = 0; ports[i]; ++i);
949 AudioEngine::n_physical_inputs (DataType type) const
958 if ((ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsOutput)) == 0) {
963 for (i = 0; ports[i]; ++i);
970 AudioEngine::get_physical_inputs (DataType type, vector<string>& ins)
979 if ((ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsOutput)) == 0) {
984 for (i = 0; ports[i]; ++i) {
985 ins.push_back (ports[i]);
992 AudioEngine::get_physical_outputs (DataType type, vector<string>& outs)
1001 if ((ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|JackPortIsInput)) == 0) {
1006 for (i = 0; ports[i]; ++i) {
1007 outs.push_back (ports[i]);
1014 AudioEngine::get_nth_physical (DataType type, uint32_t n, int flag)
1016 const char ** ports;
1020 assert(type != DataType::NIL);
1022 if (!_running || !_jack) {
1024 fatal << _("get_nth_physical called before engine was started") << endmsg;
1031 ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|flag);
1037 for (i = 0; i < n && ports[i]; ++i);
1043 free ((char *) ports);
1049 AudioEngine::get_port_total_latency (const Port& port)
1051 return port.total_latency ();
1055 AudioEngine::update_total_latency (const Port& port)
1058 fatal << _("update_total_latency() called with no JACK client connection") << endmsg;
1064 fatal << _("update_total_latency() called before engine was started") << endmsg;
1069 port.recompute_total_latency ();
1073 AudioEngine::transport_stop ()
1076 jack_transport_stop (_jack);
1081 AudioEngine::transport_start ()
1083 // cerr << "tell JACK to start\n";
1085 jack_transport_start (_jack);
1090 AudioEngine::transport_locate (nframes_t where)
1092 // cerr << "tell JACK to locate to " << where << endl;
1094 jack_transport_locate (_jack, where);
1098 AudioEngine::TransportState
1099 AudioEngine::transport_state ()
1102 jack_position_t pos;
1103 return (TransportState) jack_transport_query (_jack, &pos);
1105 return (TransportState) JackTransportStopped;
1110 AudioEngine::reset_timebase ()
1113 if (Config->get_jack_time_master()) {
1114 return jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
1116 return jack_release_timebase (_jack);
1124 AudioEngine::freewheel (bool onoff)
1128 if (onoff != _freewheeling) {
1131 _freewheel_thread_registered = false;
1134 return jack_set_freewheel (_jack, onoff);
1137 /* already doing what has been asked for */
1147 AudioEngine::remove_all_ports ()
1149 /* process lock MUST be held */
1152 RCUWriter<Ports> writer (ports);
1153 boost::shared_ptr<Ports> ps = writer.get_copy ();
1159 AudioEngine::remove_connections_for (Port& port)
1161 for (PortConnections::iterator i = port_connections.begin(); i != port_connections.end(); ) {
1162 PortConnections::iterator tmp;
1167 if ((*i).first == port.name()) {
1168 port_connections.erase (i);
1176 #ifdef HAVE_JACK_CLIENT_OPEN
1179 AudioEngine::connect_to_jack (string client_name)
1181 jack_options_t options = JackNullOption;
1182 jack_status_t status;
1183 const char *server_name = NULL;
1185 jack_client_name = client_name; /* might be reset below */
1186 _jack = jack_client_open (jack_client_name.c_str(), options, &status, server_name);
1188 if (_jack == NULL) {
1190 if (status & JackServerFailed) {
1191 error << _("Unable to connect to JACK server") << endmsg;
1194 // error message is not useful here
1198 if (status & JackServerStarted) {
1199 info << _("JACK server started") << endmsg;
1202 if (status & JackNameNotUnique) {
1203 jack_client_name = jack_get_client_name (_jack);
1206 jack_set_error_function (ardour_jack_error);
1214 AudioEngine::connect_to_jack (string client_name)
1216 jack_client_name = client_name;
1218 if ((_jack = jack_client_new (client_name.c_str())) == 0) {
1225 #endif /* HAVE_JACK_CLIENT_OPEN */
1228 AudioEngine::disconnect_from_jack ()
1236 stop_metering_thread ();
1240 Glib::Mutex::Lock lm (_process_lock);
1241 jack_client_close (_jack);
1250 Stopped(); /* EMIT SIGNAL */
1257 AudioEngine::reconnect_to_jack ()
1260 disconnect_from_jack ();
1261 /* XXX give jackd a chance */
1262 Glib::usleep (250000);
1265 if (connect_to_jack (jack_client_name)) {
1266 error << _("failed to connect to JACK") << endmsg;
1272 boost::shared_ptr<Ports> p = ports.reader ();
1274 for (i = p->begin(); i != p->end(); ++i) {
1275 if ((*i)->reestablish ()) {
1280 if (i != p->end()) {
1282 remove_all_ports ();
1288 session->reset_jack_connection (_jack);
1289 nframes_t blocksize = jack_get_buffer_size (_jack);
1290 session->set_block_size (blocksize);
1291 session->set_frame_rate (jack_get_sample_rate (_jack));
1294 last_monitor_check = 0;
1296 jack_on_shutdown (_jack, halted, this);
1297 jack_set_graph_order_callback (_jack, _graph_order_callback, this);
1298 jack_set_thread_init_callback (_jack, _thread_init_callback, this);
1299 jack_set_process_callback (_jack, _process_callback, this);
1300 jack_set_sample_rate_callback (_jack, _sample_rate_callback, this);
1301 jack_set_buffer_size_callback (_jack, _bufsize_callback, this);
1302 jack_set_xrun_callback (_jack, _xrun_callback, this);
1303 jack_set_sync_callback (_jack, _jack_sync_callback, this);
1304 jack_set_freewheel_callback (_jack, _freewheel_callback, this);
1306 if (Config->get_jack_time_master()) {
1307 jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
1310 if (jack_activate (_jack) == 0) {
1317 /* re-establish connections */
1319 for (i = p->begin(); i != p->end(); ++i) {
1323 Running (); /* EMIT SIGNAL*/
1325 start_metering_thread ();
1331 AudioEngine::request_buffer_size (nframes_t nframes)
1335 if (nframes == jack_get_buffer_size (_jack)) {
1339 return jack_set_buffer_size (_jack, nframes);
1347 AudioEngine::update_total_latencies ()
1349 #ifdef HAVE_JACK_RECOMPUTE_LATENCIES
1351 jack_recompute_total_latencies (_jack);
1357 AudioEngine::make_port_name_relative (string portname)
1359 string::size_type len;
1360 string::size_type n;
1362 len = portname.length();
1364 for (n = 0; n < len; ++n) {
1365 if (portname[n] == ':') {
1370 if ((n != len) && (portname.substr (0, n) == jack_client_name)) {
1371 return portname.substr (n+1);
1378 AudioEngine::make_port_name_non_relative (string portname)
1382 if (portname.find_first_of (':') != string::npos) {
1386 str = jack_client_name;
1394 AudioEngine::is_realtime () const
1397 return jack_is_realtime (_jack);