2 Copyright (C) 2000 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.
22 #include <sigc++/bind.h>
24 #include "pbd/failed_constructor.h"
25 #include "pbd/xml++.h"
27 #include "ardour/audio_buffer.h"
28 #include "ardour/automation_list.h"
29 #include "ardour/buffer_set.h"
30 #include "ardour/event_type_map.h"
31 #include "ardour/ladspa_plugin.h"
32 #include "ardour/plugin.h"
33 #include "ardour/plugin_insert.h"
34 #include "ardour/port.h"
35 #include "ardour/route.h"
38 #include "ardour/lv2_plugin.h"
42 #include "ardour/vst_plugin.h"
45 #ifdef HAVE_AUDIOUNITS
46 #include "ardour/audio_unit.h"
49 #include "ardour/audioengine.h"
50 #include "ardour/session.h"
51 #include "ardour/types.h"
56 using namespace ARDOUR;
59 const string PluginInsert::port_automation_node_name = "PortAutomation";
61 PluginInsert::PluginInsert (Session& s, boost::shared_ptr<Plugin> plug, Placement placement)
62 : Processor (s, plug->name(), placement),
63 _signal_analysis_collected_nframes(0),
64 _signal_analysis_collect_nframes_max(0)
66 /* the first is the master */
68 _plugins.push_back (plug);
73 Glib::Mutex::Lock em (_session.engine().process_lock());
74 IO::PortCountChanged (max(input_streams(), output_streams()));
77 ProcessorCreated (this); /* EMIT SIGNAL */
80 PluginInsert::PluginInsert (Session& s, const XMLNode& node)
81 : Processor (s, "unnamed plugin insert", PreFader),
82 _signal_analysis_collected_nframes(0),
83 _signal_analysis_collect_nframes_max(0)
85 if (set_state (node)) {
86 throw failed_constructor();
89 // XXX: This would dump all automation, which has already been loaded by
90 // Processor. But this could also have been related to the Parameter change..
91 // will look into this later.
95 Glib::Mutex::Lock em (_session.engine().process_lock());
96 IO::PortCountChanged (max(input_streams(), output_streams()));
101 PluginInsert::set_count (uint32_t num)
103 bool require_state = !_plugins.empty();
105 /* this is a bad idea.... we shouldn't do this while active.
106 only a route holding their redirect_lock should be calling this
111 } else if (num > _plugins.size()) {
112 uint32_t diff = num - _plugins.size();
114 for (uint32_t n = 0; n < diff; ++n) {
115 _plugins.push_back (plugin_factory (_plugins[0]));
118 /* XXX do something */
122 } else if (num < _plugins.size()) {
123 uint32_t diff = _plugins.size() - num;
124 for (uint32_t n= 0; n < diff; ++n) {
133 PluginInsert::init ()
138 PluginInsert::~PluginInsert ()
140 GoingAway (); /* EMIT SIGNAL */
144 PluginInsert::auto_state_changed (Evoral::Parameter which)
146 if (which.type() != PluginAutomation)
149 boost::shared_ptr<AutomationControl> c
150 = boost::dynamic_pointer_cast<AutomationControl>(data().control (which));
152 if (c && ((AutomationList*)c->list().get())->automation_state() != Off) {
153 _plugins[0]->set_parameter (which.id(), c->list()->eval (_session.transport_frame()));
158 PluginInsert::output_streams() const
160 ChanCount out = _plugins.front()->get_info()->n_outputs;
162 if (out == ChanCount::INFINITE) {
164 return _plugins.front()->output_streams ();
168 out.set_audio (out.n_audio() * _plugins.size());
169 out.set_midi (out.n_midi() * _plugins.size());
176 PluginInsert::input_streams() const
178 ChanCount in = _plugins[0]->get_info()->n_inputs;
180 if (in == ChanCount::INFINITE) {
181 return _plugins[0]->input_streams ();
183 in.set_audio (in.n_audio() * _plugins.size());
184 in.set_midi (in.n_midi() * _plugins.size());
191 PluginInsert::natural_output_streams() const
193 return _plugins[0]->get_info()->n_outputs;
197 PluginInsert::natural_input_streams() const
199 return _plugins[0]->get_info()->n_inputs;
203 PluginInsert::is_generator() const
205 /* XXX more finesse is possible here. VST plugins have a
206 a specific "instrument" flag, for example.
209 return _plugins[0]->get_info()->n_inputs.n_audio() == 0;
213 PluginInsert::set_automatable ()
215 set<Evoral::Parameter> a = _plugins.front()->automatable ();
217 Plugin::ParameterDescriptor desc;
219 for (set<Evoral::Parameter>::iterator i = a.begin(); i != a.end(); ++i) {
220 if (i->type() == PluginAutomation) {
222 _plugins.front()->get_parameter_descriptor(i->id(), desc);
223 Evoral::Parameter param(*i);
224 param.set_range(desc.lower, desc.upper, _plugins.front()->default_value(i->id()));
225 boost::shared_ptr<AutomationList> list(new AutomationList(param));
226 add_control(boost::shared_ptr<AutomationControl>(new PluginControl(this, *i, list)));
232 PluginInsert::parameter_changed (Evoral::Parameter which, float val)
234 if (which.type() != PluginAutomation)
237 vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin();
239 /* don't set the first plugin, just all the slaves */
241 if (i != _plugins.end()) {
243 for (; i != _plugins.end(); ++i) {
244 (*i)->set_parameter (which, val);
250 PluginInsert::set_block_size (nframes_t nframes)
252 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
253 (*i)->set_block_size (nframes);
258 PluginInsert::activate ()
260 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
266 PluginInsert::deactivate ()
268 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
274 PluginInsert::connect_and_run (BufferSet& bufs, nframes_t nframes, nframes_t offset, bool with_auto, nframes_t now)
276 // Calculate if, and how many frames we need to collect for analysis
277 nframes_t collect_signal_nframes = (_signal_analysis_collect_nframes_max -
278 _signal_analysis_collected_nframes);
279 if (nframes < collect_signal_nframes) { // we might not get all frames now
280 collect_signal_nframes = nframes;
283 uint32_t in_index = 0;
284 uint32_t out_index = 0;
286 /* Note that we've already required that plugins
287 be able to handle in-place processing.
294 for (Controls::iterator li = data().controls().begin(); li != data().controls().end(); ++li, ++n) {
296 boost::shared_ptr<AutomationControl> c
297 = boost::dynamic_pointer_cast<AutomationControl>(li->second);
299 if (c->parameter().type() == PluginAutomation && c->automation_playback()) {
302 const float val = c->list()->rt_safe_eval (now, valid);
312 if (collect_signal_nframes > 0) {
314 //std::cerr << "collect input, bufs " << bufs.count().n_audio() << " count, " << bufs.available().n_audio() << " available" << std::endl;
315 //std::cerr << " streams " << input_streams().n_audio() << std::endl;
316 //std::cerr << "filling buffer with " << collect_signal_nframes << " frames at " << _signal_analysis_collected_nframes << std::endl;
317 for (uint32_t i = 0; i < input_streams().n_audio(); ++i) {
318 _signal_analysis_input_bufferset.get_audio(i).read_from(
320 collect_signal_nframes,
321 _signal_analysis_collected_nframes); // offset is for target buffer
325 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
326 (*i)->connect_and_run (bufs, in_index, out_index, nframes, offset);
329 if (collect_signal_nframes > 0) {
331 //std::cerr << " output, bufs " << bufs.count().n_audio() << " count, " << bufs.available().n_audio() << " available" << std::endl;
332 //std::cerr << " streams " << output_streams().n_audio() << std::endl;
333 for (uint32_t i = 0; i < output_streams().n_audio(); ++i) {
334 _signal_analysis_output_bufferset.get_audio(i).read_from(
336 collect_signal_nframes,
337 _signal_analysis_collected_nframes); // offset is for target buffer
340 _signal_analysis_collected_nframes += collect_signal_nframes;
341 assert(_signal_analysis_collected_nframes <= _signal_analysis_collect_nframes_max);
343 if (_signal_analysis_collected_nframes == _signal_analysis_collect_nframes_max) {
344 _signal_analysis_collect_nframes_max = 0;
345 _signal_analysis_collected_nframes = 0;
347 AnalysisDataGathered(&_signal_analysis_input_bufferset,
348 &_signal_analysis_output_bufferset);
351 /* leave remaining channel buffers alone */
355 PluginInsert::silence (nframes_t nframes)
357 uint32_t in_index = 0;
358 uint32_t out_index = 0;
361 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
362 (*i)->connect_and_run (_session.get_silent_buffers ((*i)->get_info()->n_inputs), in_index, out_index, nframes, 0);
368 PluginInsert::run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes)
372 if (_session.transport_rolling()) {
373 automation_run (bufs, nframes);
375 connect_and_run (bufs, nframes, 0, false);
379 /* FIXME: type, audio only */
381 uint32_t in = _plugins[0]->get_info()->n_inputs.n_audio();
382 uint32_t out = _plugins[0]->get_info()->n_outputs.n_audio();
386 /* not active, but something has make up for any channel count increase */
388 for (uint32_t n = out - in; n < out; ++n) {
389 memcpy (bufs.get_audio(n).data(), bufs.get_audio(in - 1).data(), sizeof (Sample) * nframes);
393 bufs.count().set_audio(out);
398 PluginInsert::set_parameter (Evoral::Parameter param, float val)
400 if (param.type() != PluginAutomation)
403 /* the others will be set from the event triggered by this */
405 _plugins[0]->set_parameter (param.id(), val);
407 boost::shared_ptr<AutomationControl> ac
408 = boost::dynamic_pointer_cast<AutomationControl>(data().control(param));
413 warning << "set_parameter called for nonexistant parameter "
414 << EventTypeMap::instance().to_symbol(param) << endmsg;
417 _session.set_dirty();
421 PluginInsert::get_parameter (Evoral::Parameter param)
423 if (param.type() != PluginAutomation)
427 _plugins[0]->get_parameter (param.id());
431 PluginInsert::automation_run (BufferSet& bufs, nframes_t nframes)
433 Evoral::ControlEvent next_event (0, 0.0f);
434 nframes_t now = _session.transport_frame ();
435 nframes_t end = now + nframes;
436 nframes_t offset = 0;
438 Glib::Mutex::Lock lm (data().control_lock(), Glib::TRY_LOCK);
441 connect_and_run (bufs, nframes, offset, false);
445 if (!data().find_next_event (now, end, next_event)) {
447 /* no events have a time within the relevant range */
449 connect_and_run (bufs, nframes, offset, true, now);
455 nframes_t cnt = min (((nframes_t) ceil (next_event.when) - now), nframes);
457 connect_and_run (bufs, cnt, offset, true, now);
463 if (!data().find_next_event (now, end, next_event)) {
468 /* cleanup anything that is left to do */
471 connect_and_run (bufs, nframes, offset, true, now);
476 PluginInsert::default_parameter_value (const Evoral::Parameter& param)
478 if (param.type() != PluginAutomation)
481 if (_plugins.empty()) {
482 fatal << _("programming error: ") << X_("PluginInsert::default_parameter_value() called with no plugin")
487 return _plugins[0]->default_value (param.id());
490 boost::shared_ptr<Plugin>
491 PluginInsert::plugin_factory (boost::shared_ptr<Plugin> other)
493 boost::shared_ptr<LadspaPlugin> lp;
495 boost::shared_ptr<LV2Plugin> lv2p;
498 boost::shared_ptr<VSTPlugin> vp;
500 #ifdef HAVE_AUDIOUNITS
501 boost::shared_ptr<AUPlugin> ap;
504 if ((lp = boost::dynamic_pointer_cast<LadspaPlugin> (other)) != 0) {
505 return boost::shared_ptr<Plugin> (new LadspaPlugin (*lp));
507 } else if ((lv2p = boost::dynamic_pointer_cast<LV2Plugin> (other)) != 0) {
508 return boost::shared_ptr<Plugin> (new LV2Plugin (*lv2p));
511 } else if ((vp = boost::dynamic_pointer_cast<VSTPlugin> (other)) != 0) {
512 return boost::shared_ptr<Plugin> (new VSTPlugin (*vp));
514 #ifdef HAVE_AUDIOUNITS
515 } else if ((ap = boost::dynamic_pointer_cast<AUPlugin> (other)) != 0) {
516 return boost::shared_ptr<Plugin> (new AUPlugin (*ap));
520 fatal << string_compose (_("programming error: %1"),
521 X_("unknown plugin type in PluginInsert::plugin_factory"))
524 return boost::shared_ptr<Plugin> ((Plugin*) 0);
528 PluginInsert::configure_io (ChanCount in, ChanCount out)
530 if (set_count (count_for_configuration (in, out)) < 0) {
534 /* if we're running replicated plugins, each plugin has
535 the same i/o configuration and we may need to announce how many
536 output streams there are.
538 if we running a single plugin, we need to configure it.
541 if (_plugins.front()->configure_io (in, out) < 0) {
545 // we don't know the analysis window size, so we must work with the
546 // current buffer size here. each request for data fills in these
547 // buffers and the analyser makes sure it gets enough data for the
549 _signal_analysis_input_bufferset.ensure_buffers (in, session().engine().frames_per_cycle());
550 _signal_analysis_input_bufferset.set_count(in);
552 _signal_analysis_output_bufferset.ensure_buffers(out, session().engine().frames_per_cycle());
553 _signal_analysis_output_bufferset.set_count(out);
556 return Processor::configure_io (in, out);
560 PluginInsert::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
562 if (_plugins.front()->reconfigurable_io()) {
563 /* plugin has flexible I/O, so delegate to it */
564 return _plugins.front()->can_support_io_configuration (in, out);
567 ChanCount outputs = _plugins[0]->get_info()->n_outputs;
568 ChanCount inputs = _plugins[0]->get_info()->n_inputs;
570 if ((inputs.n_total() == 0)
571 || (inputs.n_total() == 1 && outputs == inputs)
572 || (inputs.n_total() == 1 && outputs == inputs
573 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
574 || (inputs.n_midi() == 0 && in.n_midi() == 0)))
580 bool can_replicate = true;
582 /* if number of inputs is a factor of the requested input
583 configuration for every type, we can replicate.
585 for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
586 if (inputs.get(*t) >= in.get(*t) || (inputs.get(*t) % in.get(*t) != 0)) {
587 can_replicate = false;
592 if (!can_replicate || (in.n_total() % inputs.n_total() != 0)) {
596 if (inputs.n_total() == 0) {
597 /* instrument plugin, always legal, but throws away any existing streams */
599 } else if (inputs.n_total() == 1 && outputs == inputs
600 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
601 || (inputs.n_midi() == 0 && in.n_midi() == 0))) {
602 /* mono, single-typed plugin, replicate as needed to match in */
604 } else if (inputs == in) {
608 /* replicate - note that we've already verified that
609 the replication count is constant across all data types.
611 for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
612 out.set (*t, outputs.get(*t) * (in.get(*t) / inputs.get(*t)));
619 /* Number of plugin instances required to support a given channel configuration.
623 PluginInsert::count_for_configuration (ChanCount in, ChanCount out) const
625 if (_plugins.front()->reconfigurable_io()) {
626 /* plugin has flexible I/O, so the answer is always 1 */
627 /* this could change if we ever decide to replicate AU's */
631 // FIXME: take 'out' into consideration
633 ChanCount outputs = _plugins[0]->get_info()->n_outputs;
634 ChanCount inputs = _plugins[0]->get_info()->n_inputs;
636 if (inputs.n_total() == 0) {
637 /* instrument plugin, always legal, but throws away any existing streams */
641 if (inputs.n_total() == 1 && outputs == inputs
642 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
643 || (inputs.n_midi() == 0 && in.n_midi() == 0))) {
644 /* mono plugin, replicate as needed to match in */
653 // assumes in is valid, so we must be replicating
654 if (inputs.n_total() < in.n_total()
655 && (in.n_total() % inputs.n_total() == 0)) {
657 return in.n_total() / inputs.n_total();
665 PluginInsert::get_state(void)
671 PluginInsert::state (bool full)
673 XMLNode& node = Processor::state (full);
675 node.add_property("type", _plugins[0]->state_node_name());
676 node.add_property("unique-id", _plugins[0]->unique_id());
677 node.add_property("count", string_compose("%1", _plugins.size()));
678 node.add_child_nocopy (_plugins[0]->get_state());
680 /* add port automation state */
681 //XMLNode *autonode = new XMLNode(port_automation_node_name);
682 set<Evoral::Parameter> automatable = _plugins[0]->automatable();
684 for (set<Evoral::Parameter>::iterator x = automatable.begin(); x != automatable.end(); ++x) {
686 /*XMLNode* child = new XMLNode("port");
687 snprintf(buf, sizeof(buf), "%" PRIu32, *x);
688 child->add_property("number", string(buf));
690 child->add_child_nocopy (automation_list (*x).state (full));
691 autonode->add_child_nocopy (*child);
693 //autonode->add_child_nocopy (((AutomationList*)data().control(*x)->list().get())->state (full));
696 //node.add_child_nocopy (*autonode);
702 PluginInsert::set_state(const XMLNode& node)
704 XMLNodeList nlist = node.children();
705 XMLNodeIterator niter;
706 XMLPropertyList plist;
707 const XMLProperty *prop;
708 ARDOUR::PluginType type;
710 if ((prop = node.property ("type")) == 0) {
711 error << _("XML node describing insert is missing the `type' field") << endmsg;
715 if (prop->value() == X_("ladspa") || prop->value() == X_("Ladspa")) { /* handle old school sessions */
716 type = ARDOUR::LADSPA;
717 } else if (prop->value() == X_("lv2")) {
719 } else if (prop->value() == X_("vst")) {
722 error << string_compose (_("unknown plugin type %1 in plugin insert state"),
728 prop = node.property ("unique-id");
730 error << _("Plugin has no unique ID field") << endmsg;
734 boost::shared_ptr<Plugin> plugin;
736 plugin = find_plugin (_session, prop->value(), type);
739 error << string_compose(_("Found a reference to a plugin (\"%1\") that is unknown.\n"
740 "Perhaps it was removed or moved since it was last used."), prop->value())
747 if ((prop = node.property ("count")) != 0) {
748 sscanf (prop->value().c_str(), "%u", &count);
751 if (_plugins.size() != count) {
753 _plugins.push_back (plugin);
755 for (uint32_t n=1; n < count; ++n) {
756 _plugins.push_back (plugin_factory (plugin));
760 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
761 if ((*niter)->name() == plugin->state_node_name()) {
762 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
763 (*i)->set_state (**niter);
769 const XMLNode* insert_node = &node;
771 // legacy sessions: search for child IOProcessor node
772 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
773 if ((*niter)->name() == "IOProcessor") {
774 insert_node = *niter;
779 Processor::set_state (*insert_node);
781 /* look for port automation node */
783 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
785 if ((*niter)->name() != port_automation_node_name) {
791 XMLNodeConstIterator iter;
796 cnodes = (*niter)->children ("Port");
798 for(iter = cnodes.begin(); iter != cnodes.end(); ++iter){
802 if ((cprop = child->property("number")) != 0) {
803 port = cprop->value().c_str();
805 warning << _("PluginInsert: Auto: no plugin port number") << endmsg;
809 sscanf (port, "%" PRIu32, &port_id);
811 if (port_id >= _plugins[0]->parameter_count()) {
812 warning << _("PluginInsert: Auto: port id out of range") << endmsg;
816 boost::shared_ptr<AutomationControl> c = boost::dynamic_pointer_cast<AutomationControl>(
817 data().control(Evoral::Parameter(PluginAutomation, 0, port_id), true));
819 if (!child->children().empty()) {
820 c->alist()->set_state (*child->children().front());
822 if ((cprop = child->property("auto")) != 0) {
827 sscanf (cprop->value().c_str(), "0x%x", &x);
828 c->alist()->set_automation_state (AutoState (x));
834 c->alist()->set_automation_state (Off);
845 if (niter == nlist.end()) {
846 warning << string_compose(_("XML node describing a port automation is missing the `%1' information"), port_automation_node_name) << endmsg;
849 // The name of the PluginInsert comes from the plugin, nothing else
850 _name = plugin->get_info()->name;
856 PluginInsert::describe_parameter (Evoral::Parameter param)
858 if (param.type() != PluginAutomation)
859 return Automatable::describe_parameter(param);
861 return _plugins[0]->describe_parameter (param);
865 PluginInsert::signal_latency() const
868 return _user_latency;
871 return _plugins[0]->signal_latency ();
875 PluginInsert::type ()
877 boost::shared_ptr<LadspaPlugin> lp;
879 boost::shared_ptr<VSTPlugin> vp;
881 #ifdef HAVE_AUDIOUNITS
882 boost::shared_ptr<AUPlugin> ap;
885 PluginPtr other = plugin ();
887 if ((lp = boost::dynamic_pointer_cast<LadspaPlugin> (other)) != 0) {
888 return ARDOUR::LADSPA;
890 } else if ((vp = boost::dynamic_pointer_cast<VSTPlugin> (other)) != 0) {
893 #ifdef HAVE_AUDIOUNITS
894 } else if ((ap = boost::dynamic_pointer_cast<AUPlugin> (other)) != 0) {
895 return ARDOUR::AudioUnit;
899 return (ARDOUR::PluginType) 0;
903 PluginInsert::PluginControl::PluginControl (PluginInsert* p, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> list)
904 : AutomationControl (p->session(), param, list, p->describe_parameter(param))
907 Plugin::ParameterDescriptor desc;
908 p->plugin(0)->get_parameter_descriptor (param.id(), desc);
909 _logarithmic = desc.logarithmic;
910 _toggled = desc.toggled;
914 PluginInsert::PluginControl::set_value (float val)
916 /* FIXME: probably should be taking out some lock here.. */
926 /*const float range = _list->get_max_y() - _list->get_min_y();
927 const float lower = _list->get_min_y();
930 val = lower + (range * val);
932 float log_lower = 0.0f;
934 log_lower = log(lower);
937 val = exp(log_lower + log(range) * val);
942 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugin->_plugins.begin();
943 i != _plugin->_plugins.end(); ++i) {
944 (*i)->set_parameter (_list->parameter().id(), val);
947 boost::shared_ptr<Plugin> iasp = _plugin->_impulseAnalysisPlugin.lock();
949 iasp->set_parameter (_list->parameter().id(), val);
952 AutomationControl::set_value(val);
956 PluginInsert::PluginControl::get_value (void) const
958 /* FIXME: probably should be taking out some lock here.. */
960 float val = _plugin->get_parameter (_list->parameter());
974 return ((val - lower) / range);
978 boost::shared_ptr<Plugin>
979 PluginInsert::get_impulse_analysis_plugin()
981 boost::shared_ptr<Plugin> ret;
982 if (_impulseAnalysisPlugin.expired()) {
983 ret = plugin_factory(_plugins[0]);
984 _impulseAnalysisPlugin = ret;
986 ret = _impulseAnalysisPlugin.lock();