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.
25 #include <glibmm/timer.h>
26 #include <pbd/pthread_utils.h>
27 #include <pbd/stacktrace.h>
29 #include <ardour/audioengine.h>
30 #include <ardour/buffer.h>
31 #include <ardour/port.h>
32 #include <ardour/session.h>
33 #include <ardour/cycle_timer.h>
34 #include <ardour/utils.h>
39 #include <ardour/timestamps.h>
44 using namespace ARDOUR;
47 gint AudioEngine::m_meter_exit;
50 ardour_jack_error (const char* msg)
52 // throw JACK errors away - they cause visual clutter
53 // error << "JACK: " << msg << endmsg;
56 AudioEngine::AudioEngine (string client_name)
60 session_remove_pending = false;
63 last_monitor_check = 0;
64 monitor_check_interval = max_frames;
65 _processed_frames = 0;
66 _freewheeling = false;
71 _freewheeling = false;
72 _freewheel_thread_registered = false;
75 g_atomic_int_set (&m_meter_exit, 0);
77 if (connect_to_jack (client_name)) {
78 throw NoBackendAvailable ();
81 start_metering_thread();
85 AudioEngine::~AudioEngine ()
88 Glib::Mutex::Lock tm (_process_lock);
89 session_removed.signal ();
92 jack_client_close (_jack);
95 stop_metering_thread ();
100 _thread_init_callback (void *arg)
102 /* make sure that anybody who needs to know about this thread
106 PBD::ThreadCreatedWithRequestSize (pthread_self(), X_("Audioengine"), 4096);
110 AudioEngine::start ()
115 nframes_t blocksize = jack_get_buffer_size (_jack);
117 session->set_block_size (blocksize);
118 session->set_frame_rate (jack_get_sample_rate (_jack));
120 /* page in as much of the session process code as we
121 can before we really start running.
124 session->process (blocksize);
125 session->process (blocksize);
126 session->process (blocksize);
127 session->process (blocksize);
128 session->process (blocksize);
129 session->process (blocksize);
130 session->process (blocksize);
131 session->process (blocksize);
134 _processed_frames = 0;
135 last_monitor_check = 0;
137 jack_on_shutdown (_jack, halted, this);
138 jack_set_graph_order_callback (_jack, _graph_order_callback, this);
139 jack_set_thread_init_callback (_jack, _thread_init_callback, this);
140 jack_set_process_callback (_jack, _process_callback, this);
141 jack_set_sample_rate_callback (_jack, _sample_rate_callback, this);
142 jack_set_buffer_size_callback (_jack, _bufsize_callback, this);
143 jack_set_xrun_callback (_jack, _xrun_callback, this);
144 jack_set_sync_callback (_jack, _jack_sync_callback, this);
145 jack_set_freewheel_callback (_jack, _freewheel_callback, this);
147 if (Config->get_jack_time_master()) {
148 jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
151 if (jack_activate (_jack) == 0) {
154 Running(); /* EMIT SIGNAL */
156 // error << _("cannot activate JACK client") << endmsg;
160 return _running ? 0 : -1;
164 AudioEngine::stop (bool forever)
169 jack_client_t* foo = _jack;
171 jack_client_close (foo);
172 stop_metering_thread ();
174 jack_deactivate (_jack);
176 Stopped(); /* EMIT SIGNAL */
179 return _running ? -1 : 0;
184 AudioEngine::get_sync_offset (nframes_t& offset) const
187 #ifdef HAVE_JACK_VIDEO_SUPPORT
191 (void) jack_transport_query (_jack, &pos);
193 if (pos.valid & JackVideoFrameOffset) {
194 offset = pos.video_offset;
204 AudioEngine::_jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
205 jack_position_t* pos, int new_position, void *arg)
207 static_cast<AudioEngine*> (arg)->jack_timebase_callback (state, nframes, pos, new_position);
211 AudioEngine::jack_timebase_callback (jack_transport_state_t state, nframes_t nframes,
212 jack_position_t* pos, int new_position)
214 if (_jack && session && session->synced_to_jack()) {
215 session->jack_timebase_callback (state, nframes, pos, new_position);
220 AudioEngine::_jack_sync_callback (jack_transport_state_t state, jack_position_t* pos, void* arg)
222 return static_cast<AudioEngine*> (arg)->jack_sync_callback (state, pos);
226 AudioEngine::jack_sync_callback (jack_transport_state_t state, jack_position_t* pos)
228 if (_jack && session) {
229 return session->jack_sync_callback (state, pos);
236 AudioEngine::_xrun_callback (void *arg)
238 AudioEngine* ae = static_cast<AudioEngine*> (arg);
240 ae->Xrun (); /* EMIT SIGNAL */
246 AudioEngine::_graph_order_callback (void *arg)
248 AudioEngine* ae = static_cast<AudioEngine*> (arg);
250 ae->GraphReordered (); /* EMIT SIGNAL */
256 AudioEngine::_process_callback (nframes_t nframes, void *arg)
258 return static_cast<AudioEngine *> (arg)->process_callback (nframes);
262 AudioEngine::_freewheel_callback (int onoff, void *arg)
264 static_cast<AudioEngine*>(arg)->_freewheeling = onoff;
268 AudioEngine::process_callback (nframes_t nframes)
270 // CycleTimer ct ("AudioEngine::process");
271 Glib::Mutex::Lock tm (_process_lock, Glib::TRY_LOCK);
272 nframes_t next_processed_frames;
274 /* handle wrap around of total frames counter */
276 if (max_frames - _processed_frames < nframes) {
277 next_processed_frames = nframes - (max_frames - _processed_frames);
279 next_processed_frames = _processed_frames + nframes;
282 if (!tm.locked() || session == 0) {
283 _processed_frames = next_processed_frames;
287 if (session_remove_pending) {
289 session_remove_pending = false;
290 session_removed.signal();
291 _processed_frames = next_processed_frames;
296 if (Freewheel (nframes)) {
297 cerr << "Freewheeling returned non-zero!\n";
298 _freewheeling = false;
299 jack_set_freewheel (_jack, false);
304 session->process (nframes);
307 /* we were zombified, maybe because a ladspa plugin took
308 too long, or jackd exited, or something like that.
311 _processed_frames = next_processed_frames;
315 if (last_monitor_check + monitor_check_interval < next_processed_frames) {
317 boost::shared_ptr<Ports> p = ports.reader();
319 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
324 if (port->_last_monitor != (x = port->monitoring_input ())) {
325 port->_last_monitor = x;
326 /* XXX I think this is dangerous, due to
327 a likely mutex in the signal handlers ...
329 port->MonitorInputChanged (x); /* EMIT SIGNAL */
332 last_monitor_check = next_processed_frames;
335 if (session->silent()) {
337 boost::shared_ptr<Ports> p = ports.reader();
339 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
343 if (port->sends_output()) {
344 Sample *buf = port->get_buffer(nframes);
345 memset (buf, 0, sizeof(Sample) * nframes);
346 // this should work but doesn't
347 //port->silence(0, nframes); //need to implement declicking fade
352 _processed_frames = next_processed_frames;
357 AudioEngine::_sample_rate_callback (nframes_t nframes, void *arg)
359 return static_cast<AudioEngine *> (arg)->jack_sample_rate_callback (nframes);
363 AudioEngine::jack_sample_rate_callback (nframes_t nframes)
365 _frame_rate = nframes;
366 _usecs_per_cycle = (int) floor ((((double) frames_per_cycle() / nframes)) * 1000000.0);
368 /* check for monitor input change every 1/10th of second */
370 monitor_check_interval = nframes / 10;
371 last_monitor_check = 0;
374 session->set_frame_rate (nframes);
377 SampleRateChanged (nframes); /* EMIT SIGNAL */
383 AudioEngine::_bufsize_callback (nframes_t nframes, void *arg)
385 return static_cast<AudioEngine *> (arg)->jack_bufsize_callback (nframes);
389 AudioEngine::jack_bufsize_callback (nframes_t nframes)
391 _buffer_size = nframes;
392 _usecs_per_cycle = (int) floor ((((double) nframes / frame_rate())) * 1000000.0);
393 last_monitor_check = 0;
395 boost::shared_ptr<Ports> p = ports.reader();
397 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
402 session->set_block_size (_buffer_size);
409 AudioEngine::stop_metering_thread ()
411 if (m_meter_thread) {
412 g_atomic_int_set (&m_meter_exit, 1);
413 m_meter_thread->join ();
419 AudioEngine::start_metering_thread ()
421 if (m_meter_thread == 0) {
422 m_meter_thread = Glib::Thread::create (sigc::mem_fun(this, &AudioEngine::meter_thread),
423 500000, true, true, Glib::THREAD_PRIORITY_NORMAL);
428 AudioEngine::meter_thread ()
431 Glib::usleep (10000); /* 1/100th sec interval */
432 if (g_atomic_int_get(&m_meter_exit)) {
435 IO::update_meters ();
440 AudioEngine::set_session (Session *s)
442 Glib::Mutex::Lock pl (_process_lock);
448 nframes_t blocksize = jack_get_buffer_size (_jack);
450 /* page in as much of the session process code as we
451 can before we really start running.
454 session->process (blocksize);
455 session->process (blocksize);
456 session->process (blocksize);
457 session->process (blocksize);
458 session->process (blocksize);
459 session->process (blocksize);
460 session->process (blocksize);
461 session->process (blocksize);
466 AudioEngine::remove_session ()
468 Glib::Mutex::Lock lm (_process_lock);
473 session_remove_pending = true;
474 session_removed.wait(_process_lock);
485 AudioEngine::register_input_port (DataType type, const string& portname)
489 fatal << _("register input port called before engine was started") << endmsg;
496 jack_port_t *p = jack_port_register (_jack, portname.c_str(), type.to_jack_type(), JackPortIsInput, 0);
502 if ((newport = new Port (p)) != 0) {
503 RCUWriter<Ports> writer (ports);
504 boost::shared_ptr<Ports> ps = writer.get_copy ();
505 ps->insert (ps->begin(), newport);
506 /* writer goes out of scope, forces update */
512 throw PortRegistrationFailure();
519 AudioEngine::register_output_port (DataType type, const string& portname)
523 fatal << _("register output port called before engine was started") << endmsg;
532 if ((p = jack_port_register (_jack, portname.c_str(),
533 type.to_jack_type(), JackPortIsOutput, 0)) != 0) {
538 RCUWriter<Ports> writer (ports);
539 boost::shared_ptr<Ports> ps = writer.get_copy ();
541 newport = new Port (p);
542 ps->insert (ps->begin(), newport);
544 /* writer goes out of scope, forces update */
550 throw PortRegistrationFailure ();
558 AudioEngine::unregister_port (Port *port)
561 /* probably happening when the engine has been halted by JACK,
562 in which case, there is nothing we can do here.
569 int ret = jack_port_unregister (_jack, port->_port);
575 RCUWriter<Ports> writer (ports);
576 boost::shared_ptr<Ports> ps = writer.get_copy ();
578 for (Ports::iterator i = ps->begin(); i != ps->end(); ++i) {
585 /* writer goes out of scope, forces update */
588 remove_connections_for (port);
599 AudioEngine::connect (const string& source, const string& destination)
603 fatal << _("connect called before engine was started") << endmsg;
610 string s = make_port_name_non_relative (source);
611 string d = make_port_name_non_relative (destination);
613 int ret = jack_connect (_jack, s.c_str(), d.c_str());
616 pair<string,string> c (s, d);
617 port_connections.push_back (c);
618 } else if (ret == EEXIST) {
619 error << string_compose(_("AudioEngine: connection already exists: %1 (%2) to %3 (%4)"),
620 source, s, destination, d)
623 error << string_compose(_("AudioEngine: cannot connect %1 (%2) to %3 (%4)"),
624 source, s, destination, d)
632 AudioEngine::disconnect (const string& source, const string& destination)
636 fatal << _("disconnect called before engine was started") << endmsg;
643 string s = make_port_name_non_relative (source);
644 string d = make_port_name_non_relative (destination);
646 int ret = jack_disconnect (_jack, s.c_str(), d.c_str());
649 pair<string,string> c (s, d);
650 PortConnections::iterator i;
652 if ((i = find (port_connections.begin(), port_connections.end(), c)) != port_connections.end()) {
653 port_connections.erase (i);
661 AudioEngine::disconnect (Port *port)
665 fatal << _("disconnect called before engine was started") << endmsg;
672 int ret = jack_port_disconnect (_jack, port->_port);
675 remove_connections_for (port);
683 AudioEngine::frame_rate ()
686 if (_frame_rate == 0) {
687 return (_frame_rate = jack_get_sample_rate (_jack));
692 fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK")
700 AudioEngine::frames_per_cycle ()
703 if (_buffer_size == 0) {
704 return (_buffer_size = jack_get_buffer_size (_jack));
709 fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK")
717 AudioEngine::get_port_by_name (const string& portname, bool keep)
719 Glib::Mutex::Lock lm (_process_lock);
723 fatal << _("get_port_by_name() called before engine was started") << endmsg;
730 /* check to see if we have a Port for this name already */
732 boost::shared_ptr<Ports> pr = ports.reader();
734 for (Ports::iterator i = pr->begin(); i != pr->end(); ++i) {
735 if (portname == (*i)->name()) {
742 if ((p = jack_port_by_name (_jack, portname.c_str())) != 0) {
743 Port *newport = new Port (p);
746 if (keep && newport->is_mine (_jack)) {
747 RCUWriter<Ports> writer (ports);
748 boost::shared_ptr<Ports> ps = writer.get_copy ();
749 ps->insert (newport);
750 /* writer goes out of scope, forces update */
763 AudioEngine::get_ports (const string& port_name_pattern, const string& type_name_pattern, uint32_t flags)
767 fatal << _("get_ports called before engine was started") << endmsg;
773 return jack_get_ports (_jack, port_name_pattern.c_str(), type_name_pattern.c_str(), flags);
777 AudioEngine::halted (void *arg)
779 AudioEngine* ae = static_cast<AudioEngine *> (arg);
781 ae->_running = false;
782 ae->_buffer_size = 0;
786 ae->Halted(); /* EMIT SIGNAL */
790 AudioEngine::n_physical_audio_outputs () const
799 if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsInput)) == 0) {
804 for (i = 0; ports[i]; ++i);
811 AudioEngine::n_physical_audio_inputs () const
820 if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsOutput)) == 0) {
825 for (i = 0; ports[i]; ++i);
832 AudioEngine::get_physical_audio_inputs (vector<string>& ins)
841 if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsOutput)) == 0) {
846 for (i = 0; ports[i]; ++i) {
847 ins.push_back (ports[i]);
854 AudioEngine::get_physical_audio_outputs (vector<string>& outs)
863 if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|JackPortIsInput)) == 0) {
868 for (i = 0; ports[i]; ++i) {
869 outs.push_back (ports[i]);
876 AudioEngine::get_nth_physical_audio (uint32_t n, int flag)
882 if (!_running || !_jack) {
884 fatal << _("get_nth_physical called before engine was started") << endmsg;
891 ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortIsPhysical|flag);
897 for (i = 0; i < n && ports[i]; ++i);
903 free ((char *) ports);
909 AudioEngine::get_port_total_latency (const Port& port)
912 fatal << _("get_port_total_latency() called with no JACK client connection") << endmsg;
918 fatal << _("get_port_total_latency() called before engine was started") << endmsg;
923 return jack_port_get_total_latency (_jack, port._port);
927 AudioEngine::transport_stop ()
929 // cerr << "tell JACK to stop\n";
931 jack_transport_stop (_jack);
936 AudioEngine::transport_start ()
938 // cerr << "tell JACK to start\n";
940 jack_transport_start (_jack);
945 AudioEngine::transport_locate (nframes_t where)
947 // cerr << "tell JACK to locate to " << where << endl;
949 jack_transport_locate (_jack, where);
953 AudioEngine::TransportState
954 AudioEngine::transport_state ()
958 return (TransportState) jack_transport_query (_jack, &pos);
960 return (TransportState) JackTransportStopped;
965 AudioEngine::reset_timebase ()
968 if (Config->get_jack_time_master()) {
969 return jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
971 return jack_release_timebase (_jack);
979 AudioEngine::freewheel (bool onoff)
984 _freewheel_thread_registered = false;
987 return jack_set_freewheel (_jack, onoff);
995 AudioEngine::remove_all_ports ()
997 /* process lock MUST be held */
1000 boost::shared_ptr<Ports> p = ports.reader();
1002 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
1003 jack_port_unregister (_jack, (*i)->_port);
1008 RCUWriter<Ports> writer (ports);
1009 boost::shared_ptr<Ports> ps = writer.get_copy ();
1013 port_connections.clear ();
1017 AudioEngine::remove_connections_for (Port* port)
1019 for (PortConnections::iterator i = port_connections.begin(); i != port_connections.end(); ) {
1020 PortConnections::iterator tmp;
1025 if ((*i).first == port->name()) {
1026 port_connections.erase (i);
1033 #ifdef HAVE_JACK_CLIENT_OPEN
1036 AudioEngine::connect_to_jack (string client_name)
1038 jack_options_t options = JackNullOption;
1039 jack_status_t status;
1040 const char *server_name = NULL;
1042 jack_client_name = client_name; /* might be reset below */
1044 _jack = jack_client_open (jack_client_name.c_str(), options, &status, server_name);
1046 if (_jack == NULL) {
1047 /* just return without an error message. something else will take care of it */
1051 if (status & JackNameNotUnique) {
1052 jack_client_name = jack_get_client_name (_jack);
1055 jack_set_error_function (ardour_jack_error);
1063 AudioEngine::connect_to_jack (string client_name)
1065 jack_client_name = client_name;
1067 if ((_jack = jack_client_new (client_name.c_str())) == NULL) {
1074 #endif /* HAVE_JACK_CLIENT_OPEN */
1077 AudioEngine::disconnect_from_jack ()
1083 jack_client_close (_jack);
1090 Stopped(); /* EMIT SIGNAL */
1098 AudioEngine::reconnect_to_jack ()
1101 disconnect_from_jack ();
1102 /* XXX give jackd a chance */
1103 Glib::usleep (250000);
1106 if (connect_to_jack (jack_client_name)) {
1107 error << _("failed to connect to JACK") << endmsg;
1113 boost::shared_ptr<Ports> p = ports.reader ();
1115 for (i = p->begin(); i != p->end(); ++i) {
1117 /* XXX hack hack hack */
1119 string long_name = (*i)->name();
1122 short_name = long_name.substr (long_name.find_last_of (':') + 1);
1124 if (((*i)->_port = jack_port_register (_jack, short_name.c_str(), (*i)->type(), (*i)->flags(), 0)) == 0) {
1125 error << string_compose (_("could not reregister %1"), (*i)->name()) << endmsg;
1132 if ((*i)->flags() & JackPortIsOutput) {
1133 (*i)->silence (jack_get_buffer_size (_jack), 0);
1137 if (i != p->end()) {
1139 for (Ports::iterator i = p->begin(); i != p->end(); ++i) {
1140 jack_port_unregister (_jack, (*i)->_port);
1147 session->reset_jack_connection (_jack);
1148 nframes_t blocksize = jack_get_buffer_size (_jack);
1149 session->set_block_size (blocksize);
1150 session->set_frame_rate (jack_get_sample_rate (_jack));
1153 last_monitor_check = 0;
1155 jack_on_shutdown (_jack, halted, this);
1156 jack_set_graph_order_callback (_jack, _graph_order_callback, this);
1157 jack_set_thread_init_callback (_jack, _thread_init_callback, this);
1158 jack_set_process_callback (_jack, _process_callback, this);
1159 jack_set_sample_rate_callback (_jack, _sample_rate_callback, this);
1160 jack_set_buffer_size_callback (_jack, _bufsize_callback, this);
1161 jack_set_xrun_callback (_jack, _xrun_callback, this);
1162 jack_set_sync_callback (_jack, _jack_sync_callback, this);
1163 jack_set_freewheel_callback (_jack, _freewheel_callback, this);
1165 if (Config->get_jack_time_master()) {
1166 jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this);
1169 if (jack_activate (_jack) == 0) {
1176 /* re-establish connections */
1178 for (PortConnections::iterator i = port_connections.begin(); i != port_connections.end(); ++i) {
1182 if ((err = jack_connect (_jack, (*i).first.c_str(), (*i).second.c_str())) != 0) {
1183 if (err != EEXIST) {
1184 error << string_compose (_("could not reconnect %1 and %2 (err = %3)"),
1185 (*i).first, (*i).second, err)
1191 Running (); /* EMIT SIGNAL*/
1197 AudioEngine::request_buffer_size (nframes_t nframes)
1201 if (nframes == jack_get_buffer_size (_jack)) {
1205 return jack_set_buffer_size (_jack, nframes);
1213 AudioEngine::update_total_latencies ()
1215 #ifdef HAVE_JACK_RECOMPUTE_LATENCIES
1216 jack_recompute_total_latencies (_jack);
1221 AudioEngine::make_port_name_relative (string portname)
1223 string::size_type len;
1224 string::size_type n;
1226 len = portname.length();
1228 for (n = 0; n < len; ++n) {
1229 if (portname[n] == ':') {
1234 if ((n != len) && (portname.substr (0, n) == jack_client_name)) {
1235 return portname.substr (n+1);
1242 AudioEngine::make_port_name_non_relative (string portname)
1246 if (portname.find_first_of (':') != string::npos) {
1250 str = jack_client_name;
1258 AudioEngine::is_realtime () const
1261 return jack_is_realtime (_jack);