From 8af0757b61990767f2a85e68f535a5af9976fd79 Mon Sep 17 00:00:00 2001 From: Taybin Rutkin Date: Sat, 24 Sep 2005 19:13:41 +0000 Subject: libardour added. git-svn-id: svn://localhost/trunk/ardour2@17 d708f5d6-7413-0410-9779-e7cbd77b26cf --- libs/ardour/audioengine.cc | 1115 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1115 insertions(+) create mode 100644 libs/ardour/audioengine.cc (limited to 'libs/ardour/audioengine.cc') diff --git a/libs/ardour/audioengine.cc b/libs/ardour/audioengine.cc new file mode 100644 index 0000000000..2792bd5e65 --- /dev/null +++ b/libs/ardour/audioengine.cc @@ -0,0 +1,1115 @@ +/* + 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. + + $Id$ +*/ + +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#ifdef VST_SUPPORT +#include +#endif + +#include + +#include "i18n.h" + +using namespace std; +using namespace ARDOUR; + +jack_nframes_t Port::short_over_length = 2; +jack_nframes_t Port::long_over_length = 10; + +AudioEngine::AudioEngine (string client_name) +{ + pthread_cond_init (&session_removed, 0); + 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; + + if (connect_to_jack (client_name)) { + throw NoBackendAvailable (); + } + +} + +AudioEngine::~AudioEngine () +{ + if (_running) { + jack_client_close (_jack); + } +} + +void +_thread_init_callback (void *arg) +{ + /* make sure that anybody who needs to know about this thread + knows about it. + */ + + PBD::ThreadCreated (pthread_self(), X_("Audioengine")); + +#ifdef VST_SUPPORT + if (Config->get_use_vst()) { + fst_adopt_thread (); + } +#endif +} + +int +AudioEngine::start () +{ + if (!_running) { + + if (session) { + jack_nframes_t blocksize = jack_get_buffer_size (_jack); + + 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; + } + } + + return _running ? 0 : -1; +} + +int +AudioEngine::stop () +{ + if (_running) { + _running = false; + jack_deactivate (_jack); + Stopped(); /* EMIT SIGNAL */ + } + + return _running ? -1 : 0; +} + + +void +AudioEngine::_jack_timebase_callback (jack_transport_state_t state, jack_nframes_t nframes, + + jack_position_t* pos, int new_position, void *arg) +{ + static_cast (arg)->jack_timebase_callback (state, nframes, pos, new_position); +} + +void +AudioEngine::jack_timebase_callback (jack_transport_state_t state, jack_nframes_t nframes, + + jack_position_t* pos, int new_position) +{ + if (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 (arg)->jack_sync_callback (state, pos); +} + +int +AudioEngine::jack_sync_callback (jack_transport_state_t state, jack_position_t* pos) +{ + if (session) { + return session->jack_sync_callback (state, pos); + } else { + return true; + } +} + +int +AudioEngine::_xrun_callback (void *arg) +{ + static_cast(arg)->Xrun (); /* EMIT SIGNAL */ + return 0; +} + +int +AudioEngine::_graph_order_callback (void *arg) +{ + static_cast(arg)->GraphReordered (); /* EMIT SIGNAL */ + return 0; +} + +int +AudioEngine::_process_callback (jack_nframes_t nframes, void *arg) +{ + return static_cast (arg)->process_callback (nframes); +} + +void +AudioEngine::_freewheel_callback (int onoff, void *arg) +{ + static_cast(arg)->_freewheeling = onoff; +} + +void +AudioEngine::meter (Port *port, jack_nframes_t nframes) +{ + double peak; + uint32_t overlen; + jack_default_audio_sample_t *buf; + + buf = port->get_buffer (nframes); + peak = port->_peak; + overlen = port->overlen; + + { + for (jack_nframes_t n = 0; n < nframes; ++n) { + + /* 1) peak metering */ + + peak = f_max (peak, buf[n]); + + /* 2) clip/over metering */ + + if (buf[n] >= 1.0) { + overlen++; + } else if (overlen) { + if (overlen > Port::short_over_length) { + port->_short_overs++; + } + if (overlen > Port::long_over_length) { + port->_long_overs++; + } + overlen = 0; + } + } + } + + /* post-loop check on the final status of overlen */ + + if (overlen > Port::short_over_length) { + port->_short_overs++; + } + if (overlen > Port::long_over_length) { + port->_short_overs++; + } + + if (peak > 0.0) { + port->_peak_db= 20 * fast_log10 (peak); + } else { + port->_peak_db = minus_infinity(); + } + + port->_peak = peak; + port->overlen = overlen; +} + +int +AudioEngine::process_callback (jack_nframes_t nframes) +{ + TentativeLockMonitor tm (_process_lock, __LINE__, __FILE__); + jack_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) { + _processed_frames = next_processed_frames; + return 0; + } + + if (session_remove_pending) { + session = 0; + session_remove_pending = false; + pthread_cond_signal (&session_removed); + _processed_frames = next_processed_frames; + return 0; + } + + if (_freewheeling) { + if (Freewheel (nframes)) { + _freewheeling = false; + jack_set_freewheel (_jack, false); + } + return 0; + } + + /* do input peak metering */ + + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + if ((*i)->metering) { + meter ((*i), nframes); + } + } + + session->process (nframes); + + if (!_running) { + /* we were zombified, maybe because a ladspa plugin took + too long, or jackd exited, or something like that. + */ + + _processed_frames = next_processed_frames; + return 0; + } + + if (last_monitor_check + monitor_check_interval < next_processed_frames) { + for (Ports::iterator i = ports.begin(); i != ports.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; + } + + _processed_frames = next_processed_frames; + return 0; +} + +int +AudioEngine::_sample_rate_callback (jack_nframes_t nframes, void *arg) +{ + return static_cast (arg)->jack_sample_rate_callback (nframes); +} + +int +AudioEngine::jack_sample_rate_callback (jack_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 (jack_nframes_t nframes, void *arg) +{ + return static_cast (arg)->jack_bufsize_callback (nframes); +} + +int +AudioEngine::jack_bufsize_callback (jack_nframes_t nframes) +{ + _buffer_size = nframes; + _usecs_per_cycle = (int) floor ((((double) nframes / frame_rate())) * 1000000.0); + last_monitor_check = 0; + + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + (*i)->reset(); + } + + if (session) { + session->set_block_size (_buffer_size); + } + + return 0; +} + +void +AudioEngine::set_session (Session *s) +{ + if (!session) { + s->set_block_size (jack_get_buffer_size (_jack)); + s->set_frame_rate (jack_get_sample_rate (_jack)); + session = s; + } +} + +void +AudioEngine::remove_session () +{ + LockMonitor lm (_process_lock, __LINE__, __FILE__); + + if (_running) { + + if (session) { + session_remove_pending = true; + pthread_cond_wait (&session_removed, _process_lock.mutex()); + } + + } else { + + session = 0; + + } + + remove_all_ports (); + +} + +Port * +AudioEngine::register_audio_input_port (const string& portname) +{ + if (!_running) { + if (!_has_run) { + fatal << _("register audio input port called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return 0; + } + } + + jack_port_t *p = jack_port_register (_jack, portname.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsInput, 0); + + if (p) { + + Port *newport; + if ((newport = new Port (p)) != 0) { + ports.insert (ports.begin(), newport); + } + return newport; + + } else { + + pthread_mutex_unlock (_process_lock.mutex()); + throw PortRegistrationFailure(); + } + + return 0; +} + +Port * +AudioEngine::register_audio_output_port (const string& portname) +{ + if (!_running) { + if (!_has_run) { + fatal << _("register audio output port called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return 0; + } + } + + jack_port_t *p; + + if ((p = jack_port_register (_jack, portname.c_str(), JACK_DEFAULT_AUDIO_TYPE, JackPortIsOutput, 0)) != 0) { + Port *newport = new Port (p); + ports.insert (ports.begin(), newport); + return newport; + + } else { + + pthread_mutex_unlock (_process_lock.mutex()); + throw PortRegistrationFailure (); + } + + return 0; +} + +int +AudioEngine::unregister_port (Port *port) +{ + if (!_running) { + /* probably happening when the engine has been halted by JACK, + in which case, there is nothing we can do here. + */ + return 0; + } + + if (port) { + + int ret = jack_port_unregister (_jack, port->port); + + if (ret == 0) { + + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + if ((*i) == port) { + ports.erase (i); + break; + } + } + + remove_connections_for (port); + } + + return ret; + + } else { + return -1; + } +} + +int +AudioEngine::connect (const string& source, const string& destination) +{ + 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); + + int ret = jack_connect (_jack, s.c_str(), d.c_str()); + + if (ret == 0) { + pair c (s, d); + port_connections.push_back (c); + } else { + error << 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) +{ + 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); + + int ret = jack_disconnect (_jack, s.c_str(), d.c_str()); + + if (ret == 0) { + pair c (s, d); + PortConnections::iterator i; + + if ((i = find (port_connections.begin(), port_connections.end(), c)) != port_connections.end()) { + port_connections.erase (i); + } + } + + return ret; +} + +int +AudioEngine::disconnect (Port *port) +{ + if (!_running) { + if (!_has_run) { + fatal << _("disconnect called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return -1; + } + } + + int ret = jack_port_disconnect (_jack, port->port); + + if (ret == 0) { + remove_connections_for (port); + } + + return ret; + +} + +jack_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; + } +} + +jack_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; + } +} + +Port * +AudioEngine::get_port_by_name (const string& portname, bool keep) +{ + LockMonitor lm (_process_lock, __LINE__, __FILE__); + + if (!_running) { + if (!_has_run) { + fatal << _("get_port_by_name() called before engine was started") << endmsg; + /*NOTREACHED*/ + } else { + return 0; + } + } + + /* check to see if we have a Port for this name already */ + + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + if (portname == (*i)->name()) { + return (*i); + } + } + + jack_port_t *p; + + if ((p = jack_port_by_name (_jack, portname.c_str())) != 0) { + Port *newport = new Port (p); + if (keep && newport->is_mine (_jack)) { + ports.insert (newport); + } + return newport; + } else { + 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 = reinterpret_cast (arg); + + ae->_running = false; + ae->_jack = 0; + + ae->_buffer_size = 0; + ae->_frame_rate = 0; + + ae->Halted(); /* EMIT SIGNAL */ +} + +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; + } + + if (ports) { + 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; +} + +string + +AudioEngine::get_nth_physical (uint32_t n, int flag) +{ + const char ** ports; + uint32_t i; + string ret; + + 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, NULL, 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; +} + +jack_nframes_t +AudioEngine::get_port_total_latency (const Port& port) +{ + if (!_jack) { + fatal << _("get_port_total_latency() called with no JACK client connection") << endmsg; + /*NOTREACHED*/ + } + + if (!_running) { + if (!_has_run) { + fatal << _("get_port_total_latency() called before engine was started") << endmsg; + /*NOTREACHED*/ + } + } + + return jack_port_get_total_latency (_jack, port.port); +} + +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 (jack_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 */ + + if (_jack) { + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + jack_port_unregister (_jack, (*i)->port); + } + } + + ports.clear (); + port_connections.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 << compose (_("Could not connect to JACK server as \"%1\""), jack_client_name) << endmsg; + return -1; + } + + if (status & JackServerStarted) { + info << _("JACK server started") << endmsg; + } + + if (status & JackNameNotUnique) { + jack_client_name = jack_get_client_name (_jack); + } + + 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; + } + + if (jack_client_close (_jack)) { + error << _("cannot shutdown connection to JACK") << endmsg; + } + + _buffer_size = 0; + _frame_rate = 0; + + if (_running) { + _running = false; + Stopped(); /* EMIT SIGNAL */ + } + + _jack = 0; + return 0; +} + +int +AudioEngine::reconnect_to_jack () +{ + if (_jack) { + disconnect_from_jack (); + /* XXX give jackd a chance */ + usleep (250000); + } + + if (connect_to_jack (jack_client_name)) { + error << _("failed to connect to JACK") << endmsg; + return -1; + } + + Ports::iterator i; + + for (i = ports.begin(); i != ports.end(); ++i) { + + /* XXX hack hack hack */ + + string long_name = (*i)->name(); + string short_name; + + short_name = long_name.substr (long_name.find_last_of (':') + 1); + + if (((*i)->port = jack_port_register (_jack, short_name.c_str(), (*i)->type(), (*i)->flags(), 0)) == 0) { + error << compose (_("could not reregister %1"), (*i)->name()) << endmsg; + break; + } else { + } + + (*i)->reset (); + + if ((*i)->flags() & JackPortIsOutput) { + (*i)->silence (jack_get_buffer_size (_jack), 0); + } + } + + if (i != ports.end()) { + for (Ports::iterator i = ports.begin(); i != ports.end(); ++i) { + jack_port_unregister (_jack, (*i)->port); + } + return -1; + } + + + if (session) { + 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 (PortConnections::iterator i = port_connections.begin(); i != port_connections.end(); ++i) { + + int err; + + if ((err = jack_connect (_jack, (*i).first.c_str(), (*i).second.c_str())) != 0) { + if (err != EEXIST) { + error << compose (_("could not reconnect %1 and %2 (err = %3)"), + (*i).first, (*i).second, err) + << endmsg; + } + } + } + + Running (); /* EMIT SIGNAL*/ + + return 0; +} + +int +AudioEngine::request_buffer_size (jack_nframes_t nframes) +{ + if (_jack) { + int ret = jack_set_buffer_size (_jack, nframes); + return ret; + } 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; +} + -- cgit v1.2.3