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Diffstat (limited to 'libs/ardour/audioengine.cc')
| -rw-r--r-- | libs/ardour/audioengine.cc | 1379 |
1 files changed, 1379 insertions, 0 deletions
diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc new file mode 100644 index 0000000000..8bbed46733 --- /dev/null +++ b/libs/ardour/audioengine.cc @@ -0,0 +1,1379 @@ +/* + Copyright (C) 2002 Paul Davis + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#include <unistd.h> +#include <cerrno> +#include <vector> +#include <exception> +#include <stdexcept> +#include <sstream> + +#include <glibmm/timer.h> +#include <pbd/pthread_utils.h> +#include <pbd/stacktrace.h> +#include <pbd/unknown_type.h> + +#include <midi++/jack.h> + +#include <ardour/audioengine.h> +#include <ardour/buffer.h> +#include <ardour/port.h> +#include <ardour/jack_audio_port.h> +#include <ardour/jack_midi_port.h> +#include <ardour/audio_port.h> +#include <ardour/session.h> +#include <ardour/cycle_timer.h> +#include <ardour/utils.h> +#ifdef VST_SUPPORT +#include <fst.h> +#endif + +#include <ardour/timestamps.h> + +#include "i18n.h" + +using namespace std; +using namespace ARDOUR; +using namespace PBD; + +gint AudioEngine::m_meter_exit; + +static void +ardour_jack_error (const char* msg) +{ + error << "JACK: " << msg << endmsg; +} + +AudioEngine::AudioEngine (string client_name) + : ports (new Ports) +{ + session = 0; + session_remove_pending = false; + _running = false; + _has_run = false; + last_monitor_check = 0; + monitor_check_interval = max_frames; + _processed_frames = 0; + _freewheeling = false; + _usecs_per_cycle = 0; + _jack = 0; + _frame_rate = 0; + _buffer_size = 0; + _freewheeling = false; + _freewheel_thread_registered = false; + + m_meter_thread = 0; + g_atomic_int_set (&m_meter_exit, 0); + + if (connect_to_jack (client_name)) { + throw NoBackendAvailable (); + } + Port::set_engine (this); +} + +AudioEngine::~AudioEngine () +{ + { + Glib::Mutex::Lock tm (_process_lock); + session_removed.signal (); + + if (_running) { + jack_client_close (_jack); + } + + stop_metering_thread (); + } +} + +jack_client_t* +AudioEngine::jack() const +{ + return _jack; +} + +void +_thread_init_callback (void *arg) +{ + /* make sure that anybody who needs to know about this thread + knows about it. + */ + + PBD::ThreadCreatedWithRequestSize (pthread_self(), X_("Audioengine"), 4096); + MIDI::JACK_MidiPort::set_process_thread (pthread_self()); +} + +int +AudioEngine::start () +{ + if (!_running) { + + if (session) { + nframes_t blocksize = jack_get_buffer_size (_jack); + + BootMessage (_("Connect session to engine")); + + session->set_block_size (blocksize); + session->set_frame_rate (jack_get_sample_rate (_jack)); + + /* page in as much of the session process code as we + can before we really start running. + */ + + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + session->process (blocksize); + } + + _processed_frames = 0; + last_monitor_check = 0; + + jack_on_shutdown (_jack, halted, this); + jack_set_graph_order_callback (_jack, _graph_order_callback, this); + jack_set_thread_init_callback (_jack, _thread_init_callback, this); + jack_set_process_callback (_jack, _process_callback, this); + jack_set_sample_rate_callback (_jack, _sample_rate_callback, this); + jack_set_buffer_size_callback (_jack, _bufsize_callback, this); + jack_set_xrun_callback (_jack, _xrun_callback, this); + jack_set_sync_callback (_jack, _jack_sync_callback, this); + jack_set_freewheel_callback (_jack, _freewheel_callback, this); + + if (Config->get_jack_time_master()) { + jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this); + } + + if (jack_activate (_jack) == 0) { + _running = true; + _has_run = true; + Running(); /* EMIT SIGNAL */ + } else { + // error << _("cannot activate JACK client") << endmsg; + } + + start_metering_thread(); + } + + return _running ? 0 : -1; +} + +int +AudioEngine::stop (bool forever) +{ + if (_running) { + _running = false; + stop_metering_thread (); + if (forever) { + jack_client_t* foo = _jack; + _jack = 0; + jack_client_close (foo); + } else { + jack_deactivate (_jack); + } + Stopped(); /* EMIT SIGNAL */ + } + + return _running ? -1 : 0; +} + + +bool +AudioEngine::get_sync_offset (nframes_t& offset) const +{ + +#ifdef HAVE_JACK_VIDEO_SUPPORT + + jack_position_t pos; + + (void) jack_transport_query (_jack, &pos); + + if (pos.valid & JackVideoFrameOffset) { + offset = pos.video_offset; + return true; + } + +#endif + + return false; +} + +void +AudioEngine::_jack_timebase_callback (jack_transport_state_t state, nframes_t nframes, + jack_position_t* pos, int new_position, void *arg) +{ + static_cast<AudioEngine*> (arg)->jack_timebase_callback (state, nframes, pos, new_position); +} + +void +AudioEngine::jack_timebase_callback (jack_transport_state_t state, nframes_t nframes, + jack_position_t* pos, int new_position) +{ + if (_jack && session && session->synced_to_jack()) { + session->jack_timebase_callback (state, nframes, pos, new_position); + } +} + +int +AudioEngine::_jack_sync_callback (jack_transport_state_t state, jack_position_t* pos, void* arg) +{ + return static_cast<AudioEngine*> (arg)->jack_sync_callback (state, pos); +} + +int +AudioEngine::jack_sync_callback (jack_transport_state_t state, jack_position_t* pos) +{ + if (_jack && session) { + return session->jack_sync_callback (state, pos); + } + + return true; +} + +int +AudioEngine::_xrun_callback (void *arg) +{ + AudioEngine* ae = static_cast<AudioEngine*> (arg); + if (ae->jack()) { + ae->Xrun (); /* EMIT SIGNAL */ + } + return 0; +} + +int +AudioEngine::_graph_order_callback (void *arg) +{ + AudioEngine* ae = static_cast<AudioEngine*> (arg); + if (ae->jack()) { + ae->GraphReordered (); /* EMIT SIGNAL */ + } + return 0; +} + +/** Wrapped which is called by JACK as its process callback. It is just + * here to get us back into C++ land by calling AudioEngine::process_callback() + * @param nframes Number of frames passed by JACK. + * @param arg User argument passed by JACK, which will be the AudioEngine*. + */ +int +AudioEngine::_process_callback (nframes_t nframes, void *arg) +{ + return static_cast<AudioEngine *> (arg)->process_callback (nframes); +} + +void +AudioEngine::_freewheel_callback (int onoff, void *arg) +{ + static_cast<AudioEngine*>(arg)->_freewheeling = onoff; +} + +/** Method called by JACK (via _process_callback) which says that there + * is work to be done. + * @param nframes Number of frames to process. + */ +int +AudioEngine::process_callback (nframes_t nframes) +{ + // CycleTimer ct ("AudioEngine::process"); + Glib::Mutex::Lock tm (_process_lock, Glib::TRY_LOCK); + + /// The number of frames that will have been processed when we've finished + nframes_t next_processed_frames; + + /* handle wrap around of total frames counter */ + + if (max_frames - _processed_frames < nframes) { + next_processed_frames = nframes - (max_frames - _processed_frames); + } else { + next_processed_frames = _processed_frames + nframes; + } + + if (!tm.locked() || session == 0) { + /* return having done nothing */ + _processed_frames = next_processed_frames; + return 0; + } + + if (session_remove_pending) { + /* perform the actual session removal */ + session = 0; + session_remove_pending = false; + session_removed.signal(); + _processed_frames = next_processed_frames; + return 0; + } + + if (_freewheeling) { + /* emit the Freewheel signal and stop freewheeling in the event of trouble */ + if (Freewheel (nframes)) { + cerr << "Freewheeling returned non-zero!\n"; + _freewheeling = false; + jack_set_freewheel (_jack, false); + } + return 0; + } + + boost::shared_ptr<Ports> p = ports.reader(); + + // Prepare ports (ie read data if necessary) + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + (*i)->cycle_start (nframes, 0); + } + + if (session) { + session->process (nframes); + } + + // Finalize ports (ie write data if necessary) + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + (*i)->cycle_end (nframes, 0); + } + + if (!_running) { + _processed_frames = next_processed_frames; + return 0; + } + + if (last_monitor_check + monitor_check_interval < next_processed_frames) { + + boost::shared_ptr<Ports> p = ports.reader(); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + + Port *port = (*i); + bool x; + + if (port->_last_monitor != (x = port->monitoring_input ())) { + port->_last_monitor = x; + /* XXX I think this is dangerous, due to + a likely mutex in the signal handlers ... + */ + port->MonitorInputChanged (x); /* EMIT SIGNAL */ + } + } + last_monitor_check = next_processed_frames; + } + + if (session->silent()) { + + boost::shared_ptr<Ports> p = ports.reader(); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + + Port *port = (*i); + + if (port->sends_output()) { + port->get_buffer().silence(nframes); + } + } + } + + _processed_frames = next_processed_frames; + return 0; +} + +int +AudioEngine::_sample_rate_callback (nframes_t nframes, void *arg) +{ + return static_cast<AudioEngine *> (arg)->jack_sample_rate_callback (nframes); +} + +int +AudioEngine::jack_sample_rate_callback (nframes_t nframes) +{ + _frame_rate = nframes; + _usecs_per_cycle = (int) floor ((((double) frames_per_cycle() / nframes)) * 1000000.0); + + /* check for monitor input change every 1/10th of second */ + + monitor_check_interval = nframes / 10; + last_monitor_check = 0; + + if (session) { + session->set_frame_rate (nframes); + } + + SampleRateChanged (nframes); /* EMIT SIGNAL */ + + return 0; +} + +int +AudioEngine::_bufsize_callback (nframes_t nframes, void *arg) +{ + return static_cast<AudioEngine *> (arg)->jack_bufsize_callback (nframes); +} + +int +AudioEngine::jack_bufsize_callback (nframes_t nframes) +{ + _buffer_size = nframes; + _usecs_per_cycle = (int) floor ((((double) nframes / frame_rate())) * 1000000.0); + last_monitor_check = 0; + + boost::shared_ptr<Ports> p = ports.reader(); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + (*i)->reset(); + } + + if (session) { + session->set_block_size (_buffer_size); + } + + return 0; +} + +void +AudioEngine::stop_metering_thread () +{ + if (m_meter_thread) { + g_atomic_int_set (&m_meter_exit, 1); + m_meter_thread->join (); + m_meter_thread = 0; + } +} + +void +AudioEngine::start_metering_thread () +{ + if (m_meter_thread == 0) { + g_atomic_int_set (&m_meter_exit, 0); + m_meter_thread = Glib::Thread::create (sigc::mem_fun(this, &AudioEngine::meter_thread), + 500000, true, true, Glib::THREAD_PRIORITY_NORMAL); + } +} + +void +AudioEngine::meter_thread () +{ + while (true) { + Glib::usleep (10000); /* 1/100th sec interval */ + if (g_atomic_int_get(&m_meter_exit)) { + break; + } + IO::update_meters (); + } +} + +void +AudioEngine::set_session (Session *s) +{ + Glib::Mutex::Lock pl (_process_lock); + + if (!session) { + + session = s; + + nframes_t blocksize = jack_get_buffer_size (_jack); + + /* page in as much of the session process code as we + can before we really start running. + */ + + boost::shared_ptr<Ports> p = ports.reader(); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + (*i)->cycle_start (blocksize, 0); + } + + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + s->process (blocksize); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + (*i)->cycle_end (blocksize, 0); + } + } +} + +void +AudioEngine::remove_session () +{ + Glib::Mutex::Lock lm (_process_lock); + + if (_running) { + + if (session) { + session_remove_pending = true; + session_removed.wait(_process_lock); + } + + } else { + session = 0; + } + + //FIXME: Preliminary bugfix for http://tracker.ardour.org/view.php?id=1985 + //remove_all_ports (); +} + +void +AudioEngine::port_registration_failure (const std::string& portname) +{ + string full_portname = jack_client_name; + full_portname += ':'; + full_portname += portname; + + + jack_port_t* p = jack_port_by_name (_jack, full_portname.c_str()); + string reason; + + if (p) { + reason = _("a port with this name already exists: check for duplicated track/bus names"); + } else { + reason = _("unknown error"); + } + + throw PortRegistrationFailure (string_compose (_("AudioEngine: cannot register port \"%1\": %2"), portname, reason).c_str()); +} + +Port * +AudioEngine::register_port (DataType dtype, const string& portname, bool input, bool publish) +{ + Port* newport = 0; + + /*cerr << "trying to register port with name " << portname << endl;*/ + try { + if (dtype == DataType::AUDIO) { + newport = new AudioPort (portname, (input ? Port::IsInput : Port::IsOutput), publish, frames_per_cycle()); + } else if (dtype == DataType::MIDI) { + newport = new MidiPort (portname, (input ? Port::IsInput : Port::IsOutput), publish, frames_per_cycle()); + } else { + throw unknown_type(); + } + + /*cerr << "successfully got port " << portname << " with address " << newport << endl;*/ + + RCUWriter<Ports> writer (ports); + boost::shared_ptr<Ports> ps = writer.get_copy (); + /*cerr << "Address of ports list: " << ps << endl + << "Ports set size before insert: " << ps->size() << endl;*/ + ps->insert (ps->begin(), newport); + /*cerr << "Ports set size after insert: " << ps->size() << endl;*/ + + /* writer goes out of scope, forces update */ + + return newport; + } + + catch (...) { + throw PortRegistrationFailure("unable to create port (unknown type?)"); + } +} + +Port* +AudioEngine::get_port (const std::string& full_name) +{ + boost::shared_ptr<Ports> p = ports.reader(); + + for (Ports::iterator i = p->begin(); i != p->end(); ++i) { + //cerr << "comparing port name '" << (*i)->name() << "' with '" << full_name << "'" << endl; + if ((*i)->name() == full_name) { + return *i; + } + } + return 0; +} + + +Port * +AudioEngine::register_input_port (DataType type, const string& portname, bool publish) +{ + return register_port (type, portname, true, publish); +} + +Port * +AudioEngine::register_output_port (DataType type, const string& portname, bool publish) +{ + return register_port (type, portname, false, publish); +} + +int +AudioEngine::unregister_port (Port& port) +{ + /* caller must hold process lock */ + + cerr << "about to unregister Port xx x" << &port << "\n"; + + if (!_running) { + /* probably happening when the engine has been halted by JACK, + in which case, there is nothing we can do here. + */ + cerr << "not running\n"; + return 0; + } + + { + cerr << "before getcopy\n"; + + RCUWriter<Ports> writer (ports); + boost::shared_ptr<Ports> ps = writer.get_copy (); + + cerr << "Ports set size: " << ps.get()->size() << endl; + + for (Ports::iterator i = ps->begin(); i != ps->end(); ++i) { + cerr << "before delete" << endl; + if ((*i) == &port) { + cerr << "About to delete " << &port << endl; + delete *i; + ps->erase (i); + cerr << "After erasing ports size: " << ps->size(); + break; + } + } + + /* writer goes out of scope, forces update */ + } + + cerr << "before remove_connections\n"; + remove_connections_for (port); + + return 0; +} + +int +AudioEngine::connect (const string& source, const string& destination) +{ + int ret; + + if (!_running) { + if (!_has_run) { + fatal << _("connect called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return -1; + } + } + + string s = make_port_name_non_relative (source); + string d = make_port_name_non_relative (destination); + + //cerr << "Trying to connect source: " << s << " with destination " << d << endl; + + Port* src = get_port (s); + Port* dst = get_port (d); + + if (src && dst) { + + /* both ports are known to us, so do the internal connect stuff */ + + if ((ret = src->connect (*dst)) == 0) { + ret = dst->connect (*src); + } + + } else if (src || dst) { + + /* one port is known to us, try to connect it to something external */ + + PortConnectableByName* pcn; + string other; + + if (src) { + pcn = dynamic_cast<PortConnectableByName*>(src); + other = d; + } else { + pcn = dynamic_cast<PortConnectableByName*>(dst); + other = s; + } + + if (pcn) { + ret = pcn->connect (other); + } else { + ret = -1; + } + + } else { + + /* neither port is known to us, and this API isn't intended for use as a general patch bay */ + + ret = -1; + + } + + if (ret > 0) { + error << string_compose(_("AudioEngine: connection already exists: %1 (%2) to %3 (%4)"), + source, s, destination, d) + << endmsg; + } else if (ret < 0) { + error << string_compose(_("AudioEngine: cannot connect %1 (%2) to %3 (%4)"), + source, s, destination, d) + << endmsg; + } + + return ret; +} + +int +AudioEngine::disconnect (const string& source, const string& destination) +{ + int ret; + + if (!_running) { + if (!_has_run) { + fatal << _("disconnect called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return -1; + } + } + + string s = make_port_name_non_relative (source); + string d = make_port_name_non_relative (destination); + + //cerr << "trying to disconnect port '" << s << "' from port '" << d << endl; + + Port* src = get_port (s); + Port* dst = get_port (d); + + if (src && dst) { + + /* both ports are known to us, so do the internal connect stuff */ + + if ((ret = src->disconnect (*dst)) == 0) { + ret = dst->disconnect (*src); + } + + } else if (src || dst) { + + /* one port is known to us, try to connect it to something external */ + + + PortConnectableByName* pcn; + string other; + + if (src) { + pcn = dynamic_cast<PortConnectableByName*>(src); + other = d; + } else { + pcn = dynamic_cast<PortConnectableByName*>(dst); + other = s; + } + + if (pcn) { + ret = pcn->disconnect (other); + } else { + ret = -1; + } + + } else { + + /* neither port is known to us, and this API isn't intended for use as a general patch bay */ + + ret = -1; + + } + + return ret; +} + +int +AudioEngine::disconnect (Port& port) +{ + if (!_running) { + if (!_has_run) { + fatal << _("disconnect called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return -1; + } + } + + return port.disconnect_all (); +} + +ARDOUR::nframes_t +AudioEngine::frame_rate () +{ + if (_jack) { + if (_frame_rate == 0) { + return (_frame_rate = jack_get_sample_rate (_jack)); + } else { + return _frame_rate; + } + } else { + fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK") + << endmsg; + /*NOTREACHED*/ + return 0; + } +} + +ARDOUR::nframes_t +AudioEngine::frames_per_cycle () +{ + if (_jack) { + if (_buffer_size == 0) { + return (_buffer_size = jack_get_buffer_size (_jack)); + } else { + return _buffer_size; + } + } else { + fatal << X_("programming error: AudioEngine::frame_rate() called while disconnected from JACK") + << endmsg; + /*NOTREACHED*/ + return 0; + } +} + +/** Get a port by name. + * Note this can return NULL, it will NOT create a port if it is not found (any more). + */ +Port * +AudioEngine::get_port_by_name (const string& portname, bool keep) const +{ + Glib::Mutex::Lock lm (_process_lock); + + if (!_running) { + if (!_has_run) { + fatal << _("get_port_by_name() called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return 0; + } + } + + boost::shared_ptr<Ports> pr = ports.reader(); + + for (Ports::iterator i = pr->begin(); i != pr->end(); ++i) { + if (portname == (*i)->name()) { + return (*i); + } + } + + return 0; +} + +const char ** +AudioEngine::get_ports (const string& port_name_pattern, const string& type_name_pattern, uint32_t flags) +{ + if (!_running) { + if (!_has_run) { + fatal << _("get_ports called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return 0; + } + } + return jack_get_ports (_jack, port_name_pattern.c_str(), type_name_pattern.c_str(), flags); +} + +void +AudioEngine::halted (void *arg) +{ + AudioEngine* ae = static_cast<AudioEngine *> (arg); + bool was_running = ae->_running; + + ae->stop_metering_thread (); + + ae->_running = false; + ae->_buffer_size = 0; + ae->_frame_rate = 0; + ae->_jack = 0; + + if (was_running) { + ae->Halted(); /* EMIT SIGNAL */ + } +} + +bool +AudioEngine::can_request_hardware_monitoring () +{ + const char ** ports; + + if (!_jack) { + return 0; + } + + if ((ports = jack_get_ports (_jack, NULL, JACK_DEFAULT_AUDIO_TYPE, JackPortCanMonitor)) == 0) { + return false; + } + + free (ports); + + return true; +} + + +uint32_t +AudioEngine::n_physical_outputs () const +{ + const char ** ports; + uint32_t i = 0; + + if (!_jack) { + return 0; + } + + if ((ports = jack_get_ports (_jack, NULL, NULL, JackPortIsPhysical|JackPortIsInput)) == 0) { + return 0; + } + + for (i = 0; ports[i]; ++i); + free (ports); + + return i; +} + +uint32_t +AudioEngine::n_physical_inputs () const +{ + const char ** ports; + uint32_t i = 0; + + if (!_jack) { + return 0; + } + + if ((ports = jack_get_ports (_jack, NULL, NULL, JackPortIsPhysical|JackPortIsOutput)) == 0) { + return 0; + } + + if (ports) { + for (i = 0; ports[i]; ++i); + free (ports); + } + return i; +} + +void +AudioEngine::get_physical_inputs (vector<string>& ins) +{ + const char ** ports; + uint32_t i = 0; + + if (!_jack) { + return; + } + + if ((ports = jack_get_ports (_jack, NULL, NULL, JackPortIsPhysical|JackPortIsOutput)) == 0) { + return; + } + + if (ports) { + for (i = 0; ports[i]; ++i) { + ins.push_back (ports[i]); + } + free (ports); + } +} + +void +AudioEngine::get_physical_outputs (vector<string>& outs) +{ + const char ** ports; + uint32_t i = 0; + + if (!_jack) { + return; + } + + if ((ports = jack_get_ports (_jack, NULL, NULL, JackPortIsPhysical|JackPortIsInput)) == 0) { + return; + } + + if (ports) { + for (i = 0; ports[i]; ++i) { + outs.push_back (ports[i]); + } + free (ports); + } +} + +string +AudioEngine::get_nth_physical (DataType type, uint32_t n, int flag) +{ + const char ** ports; + uint32_t i; + string ret; + + assert(type != DataType::NIL); + + if (!_running || !_jack) { + if (!_has_run) { + fatal << _("get_nth_physical called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return ""; + } + } + + ports = jack_get_ports (_jack, NULL, type.to_jack_type(), JackPortIsPhysical|flag); + + if (ports == 0) { + return ""; + } + + for (i = 0; i < n && ports[i]; ++i); + + if (ports[i]) { + ret = ports[i]; + } + + free ((char *) ports); + + return ret; +} + +ARDOUR::nframes_t +AudioEngine::get_port_total_latency (const Port& port) +{ + return port.total_latency (); +} + +void +AudioEngine::update_total_latency (const Port& port) +{ + if (!_jack) { + fatal << _("update_total_latency() called with no JACK client connection") << endmsg; + /*NOTREACHED*/ + } + + if (!_running) { + if (!_has_run) { + fatal << _("update_total_latency() called before engine was started") << endmsg; + /*NOTREACHED*/ + } + } + + port.recompute_total_latency (); +} + +void +AudioEngine::transport_stop () +{ + // cerr << "tell JACK to stop\n"; + if (_jack) { + jack_transport_stop (_jack); + } +} + +void +AudioEngine::transport_start () +{ + // cerr << "tell JACK to start\n"; + if (_jack) { + jack_transport_start (_jack); + } +} + +void +AudioEngine::transport_locate (nframes_t where) +{ + // cerr << "tell JACK to locate to " << where << endl; + if (_jack) { + jack_transport_locate (_jack, where); + } +} + +AudioEngine::TransportState +AudioEngine::transport_state () +{ + if (_jack) { + jack_position_t pos; + return (TransportState) jack_transport_query (_jack, &pos); + } else { + return (TransportState) JackTransportStopped; + } +} + +int +AudioEngine::reset_timebase () +{ + if (_jack) { + if (Config->get_jack_time_master()) { + return jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this); + } else { + return jack_release_timebase (_jack); + } + } else { + return -1; + } +} + +int +AudioEngine::freewheel (bool onoff) +{ + if (_jack) { + + if (onoff) { + _freewheel_thread_registered = false; + } + + return jack_set_freewheel (_jack, onoff); + + } else { + return -1; + } +} + +void +AudioEngine::remove_all_ports () +{ + /* process lock MUST be held */ + + { + RCUWriter<Ports> writer (ports); + boost::shared_ptr<Ports> ps = writer.get_copy (); + ps->clear (); + } +} + +void +AudioEngine::remove_connections_for (Port& port) +{ + for (PortConnections::iterator i = port_connections.begin(); i != port_connections.end(); ) { + PortConnections::iterator tmp; + + tmp = i; + ++tmp; + + if ((*i).first == port.name()) { + port_connections.erase (i); + } + + i = tmp; + } +} + + +#ifdef HAVE_JACK_CLIENT_OPEN + +int +AudioEngine::connect_to_jack (string client_name) +{ + jack_options_t options = JackNullOption; + jack_status_t status; + const char *server_name = NULL; + + jack_client_name = client_name; /* might be reset below */ + _jack = jack_client_open (jack_client_name.c_str(), options, &status, server_name); + + if (_jack == NULL) { + + if (status & JackServerFailed) { + error << _("Unable to connect to JACK server") << endmsg; + } + + // error message is not useful here + return -1; + } + + if (status & JackServerStarted) { + info << _("JACK server started") << endmsg; + } + + if (status & JackNameNotUnique) { + jack_client_name = jack_get_client_name (_jack); + } + + jack_set_error_function (ardour_jack_error); + + return 0; +} + +#else + +int +AudioEngine::connect_to_jack (string client_name) +{ + jack_client_name = client_name; + + if ((_jack = jack_client_new (client_name.c_str())) == NULL) { + return -1; + } + + return 0; +} + +#endif /* HAVE_JACK_CLIENT_OPEN */ + +int +AudioEngine::disconnect_from_jack () +{ + if (_jack == 0) { + return 0; + } + + jack_client_close (_jack); + + _buffer_size = 0; + _frame_rate = 0; + + if (_running) { + stop_metering_thread (); + _running = false; + Stopped(); /* EMIT SIGNAL */ + } + + _jack = 0; + return 0; +} + +int +AudioEngine::reconnect_to_jack () +{ + if (_jack) { + disconnect_from_jack (); + /* XXX give jackd a chance */ + Glib::usleep (250000); + } + + if (connect_to_jack (jack_client_name)) { + error << _("failed to connect to JACK") << endmsg; + return -1; + } + + Ports::iterator i; + + boost::shared_ptr<Ports> p = ports.reader (); + + for (i = p->begin(); i != p->end(); ++i) { + if ((*i)->reestablish ()) { + break; + } + } + + if (i != p->end()) { + /* failed */ + remove_all_ports (); + return -1; + } + + + if (session) { + session->reset_jack_connection (_jack); + nframes_t blocksize = jack_get_buffer_size (_jack); + session->set_block_size (blocksize); + session->set_frame_rate (jack_get_sample_rate (_jack)); + } + + last_monitor_check = 0; + + jack_on_shutdown (_jack, halted, this); + jack_set_graph_order_callback (_jack, _graph_order_callback, this); + jack_set_thread_init_callback (_jack, _thread_init_callback, this); + jack_set_process_callback (_jack, _process_callback, this); + jack_set_sample_rate_callback (_jack, _sample_rate_callback, this); + jack_set_buffer_size_callback (_jack, _bufsize_callback, this); + jack_set_xrun_callback (_jack, _xrun_callback, this); + jack_set_sync_callback (_jack, _jack_sync_callback, this); + jack_set_freewheel_callback (_jack, _freewheel_callback, this); + + if (Config->get_jack_time_master()) { + jack_set_timebase_callback (_jack, 0, _jack_timebase_callback, this); + } + + if (jack_activate (_jack) == 0) { + _running = true; + _has_run = true; + } else { + return -1; + } + + /* re-establish connections */ + + for (i = p->begin(); i != p->end(); ++i) { + (*i)->reconnect (); + } + + Running (); /* EMIT SIGNAL*/ + + start_metering_thread (); + + return 0; +} + +int +AudioEngine::request_buffer_size (nframes_t nframes) +{ + if (_jack) { + + if (nframes == jack_get_buffer_size (_jack)) { + return 0; + } + + return jack_set_buffer_size (_jack, nframes); + + } else { + return -1; + } +} + +void +AudioEngine::update_total_latencies () +{ +#ifdef HAVE_JACK_RECOMPUTE_LATENCIES + jack_recompute_total_latencies (_jack); +#endif +} + +string +AudioEngine::make_port_name_relative (string portname) +{ + string::size_type len; + string::size_type n; + + len = portname.length(); + + for (n = 0; n < len; ++n) { + if (portname[n] == ':') { + break; + } + } + + if ((n != len) && (portname.substr (0, n) == jack_client_name)) { + return portname.substr (n+1); + } + + return portname; +} + +string +AudioEngine::make_port_name_non_relative (string portname) +{ + string str; + + if (portname.find_first_of (':') != string::npos) { + return portname; + } + + str = jack_client_name; + str += ':'; + str += portname; + + return str; +} + +bool +AudioEngine::is_realtime () const +{ + if (_jack) { + return jack_is_realtime (_jack); + } else { + return false; + } +} |