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/plugin_insert.h>
28 #include <ardour/plugin.h>
29 #include <ardour/port.h>
30 #include <ardour/route.h>
31 #include <ardour/ladspa_plugin.h>
32 #include <ardour/buffer_set.h>
33 #include <ardour/automation_list.h>
34 #include <ardour/audio_buffer.h>
37 #include <ardour/lv2_plugin.h>
41 #include <ardour/vst_plugin.h>
44 #ifdef HAVE_AUDIOUNITS
45 #include <ardour/audio_unit.h>
48 #include <ardour/audioengine.h>
49 #include <ardour/session.h>
50 #include <ardour/types.h>
55 using namespace ARDOUR;
58 const string PluginInsert::port_automation_node_name = "PortAutomation";
60 PluginInsert::PluginInsert (Session& s, boost::shared_ptr<Plugin> plug, Placement placement)
61 : Processor (s, plug->name(), placement),
62 _signal_analysis_collected_nframes(0),
63 _signal_analysis_collect_nframes_max(0)
65 /* the first is the master */
67 _plugins.push_back (plug);
72 Glib::Mutex::Lock em (_session.engine().process_lock());
73 IO::PortCountChanged (max(input_streams(), output_streams()));
76 ProcessorCreated (this); /* EMIT SIGNAL */
79 PluginInsert::PluginInsert (Session& s, const XMLNode& node)
80 : Processor (s, "unnamed plugin insert", PreFader),
81 _signal_analysis_collected_nframes(0),
82 _signal_analysis_collect_nframes_max(0)
84 if (set_state (node)) {
85 throw failed_constructor();
88 // XXX: This would dump all automation, which has already been loaded by
89 // Processor. But this could also have been related to the Parameter change..
90 // will look into this later.
94 Glib::Mutex::Lock em (_session.engine().process_lock());
95 IO::PortCountChanged (max(input_streams(), output_streams()));
100 PluginInsert::set_count (uint32_t num)
102 bool require_state = !_plugins.empty();
104 /* this is a bad idea.... we shouldn't do this while active.
105 only a route holding their redirect_lock should be calling this
110 } else if (num > _plugins.size()) {
111 uint32_t diff = num - _plugins.size();
113 for (uint32_t n = 0; n < diff; ++n) {
114 _plugins.push_back (plugin_factory (_plugins[0]));
117 /* XXX do something */
121 } else if (num < _plugins.size()) {
122 uint32_t diff = _plugins.size() - num;
123 for (uint32_t n= 0; n < diff; ++n) {
132 PluginInsert::init ()
137 PluginInsert::~PluginInsert ()
139 GoingAway (); /* EMIT SIGNAL */
143 PluginInsert::auto_state_changed (Evoral::Parameter which)
145 if (which.type() != PluginAutomation)
148 boost::shared_ptr<AutomationControl> c
149 = boost::dynamic_pointer_cast<AutomationControl>(data().control (which));
151 if (c && ((AutomationList*)c->list().get())->automation_state() != Off) {
152 _plugins[0]->set_parameter (which.id(), c->list()->eval (_session.transport_frame()));
157 PluginInsert::output_streams() const
159 ChanCount out = _plugins.front()->get_info()->n_outputs;
161 if (out == ChanCount::INFINITE) {
163 return _plugins.front()->output_streams ();
167 out.set_audio (out.n_audio() * _plugins.size());
168 out.set_midi (out.n_midi() * _plugins.size());
175 PluginInsert::input_streams() const
177 ChanCount in = _plugins[0]->get_info()->n_inputs;
179 if (in == ChanCount::INFINITE) {
180 return _plugins[0]->input_streams ();
182 in.set_audio (in.n_audio() * _plugins.size());
183 in.set_midi (in.n_midi() * _plugins.size());
190 PluginInsert::natural_output_streams() const
192 return _plugins[0]->get_info()->n_outputs;
196 PluginInsert::natural_input_streams() const
198 return _plugins[0]->get_info()->n_inputs;
202 PluginInsert::is_generator() const
204 /* XXX more finesse is possible here. VST plugins have a
205 a specific "instrument" flag, for example.
208 return _plugins[0]->get_info()->n_inputs.n_audio() == 0;
212 PluginInsert::set_automatable ()
214 set<Evoral::Parameter> a = _plugins.front()->automatable ();
216 Plugin::ParameterDescriptor desc;
218 for (set<Evoral::Parameter>::iterator i = a.begin(); i != a.end(); ++i) {
219 if (i->type() == PluginAutomation) {
221 _plugins.front()->get_parameter_descriptor(i->id(), desc);
222 Evoral::Parameter param(*i);
223 param.set_range(desc.lower, desc.upper, _plugins.front()->default_value(i->id()));
224 boost::shared_ptr<AutomationList> list(new AutomationList(param));
225 add_control(boost::shared_ptr<AutomationControl>(new PluginControl(this, *i, list)));
231 PluginInsert::parameter_changed (Evoral::Parameter which, float val)
233 if (which.type() != PluginAutomation)
236 vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin();
238 /* don't set the first plugin, just all the slaves */
240 if (i != _plugins.end()) {
242 for (; i != _plugins.end(); ++i) {
243 (*i)->set_parameter (which, val);
249 PluginInsert::set_block_size (nframes_t nframes)
251 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
252 (*i)->set_block_size (nframes);
257 PluginInsert::activate ()
259 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
265 PluginInsert::deactivate ()
267 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
273 PluginInsert::connect_and_run (BufferSet& bufs, nframes_t nframes, nframes_t offset, bool with_auto, nframes_t now)
275 // Calculate if, and how many frames we need to collect for analysis
276 nframes_t collect_signal_nframes = (_signal_analysis_collect_nframes_max -
277 _signal_analysis_collected_nframes);
278 if (nframes < collect_signal_nframes) { // we might not get all frames now
279 collect_signal_nframes = nframes;
282 uint32_t in_index = 0;
283 uint32_t out_index = 0;
285 /* Note that we've already required that plugins
286 be able to handle in-place processing.
293 for (Controls::iterator li = data().controls().begin(); li != data().controls().end(); ++li, ++n) {
295 boost::shared_ptr<AutomationControl> c
296 = boost::dynamic_pointer_cast<AutomationControl>(li->second);
298 if (c->parameter().type() == PluginAutomation && c->automation_playback()) {
301 const float val = c->list()->rt_safe_eval (now, valid);
311 if (collect_signal_nframes > 0) {
313 //std::cerr << "collect input, bufs " << bufs.count().n_audio() << " count, " << bufs.available().n_audio() << " available" << std::endl;
314 //std::cerr << " streams " << input_streams().n_audio() << std::endl;
315 //std::cerr << "filling buffer with " << collect_signal_nframes << " frames at " << _signal_analysis_collected_nframes << std::endl;
316 for (uint32_t i = 0; i < input_streams().n_audio(); ++i) {
317 _signal_analysis_input_bufferset.get_audio(i).read_from(
319 collect_signal_nframes,
320 _signal_analysis_collected_nframes); // offset is for target buffer
324 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
325 (*i)->connect_and_run (bufs, in_index, out_index, nframes, offset);
328 if (collect_signal_nframes > 0) {
330 //std::cerr << " output, bufs " << bufs.count().n_audio() << " count, " << bufs.available().n_audio() << " available" << std::endl;
331 //std::cerr << " streams " << output_streams().n_audio() << std::endl;
332 for (uint32_t i = 0; i < output_streams().n_audio(); ++i) {
333 _signal_analysis_output_bufferset.get_audio(i).read_from(
335 collect_signal_nframes,
336 _signal_analysis_collected_nframes); // offset is for target buffer
339 _signal_analysis_collected_nframes += collect_signal_nframes;
340 assert(_signal_analysis_collected_nframes <= _signal_analysis_collect_nframes_max);
342 if (_signal_analysis_collected_nframes == _signal_analysis_collect_nframes_max) {
343 _signal_analysis_collect_nframes_max = 0;
344 _signal_analysis_collected_nframes = 0;
346 AnalysisDataGathered(&_signal_analysis_input_bufferset,
347 &_signal_analysis_output_bufferset);
350 /* leave remaining channel buffers alone */
354 PluginInsert::silence (nframes_t nframes, nframes_t offset)
356 uint32_t in_index = 0;
357 uint32_t out_index = 0;
360 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
361 (*i)->connect_and_run (_session.get_silent_buffers ((*i)->get_info()->n_inputs), in_index, out_index, nframes, offset);
367 PluginInsert::run_in_place (BufferSet& bufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset)
371 if (_session.transport_rolling()) {
372 automation_run (bufs, nframes, offset);
374 connect_and_run (bufs, nframes, offset, false);
378 /* FIXME: type, audio only */
380 uint32_t in = _plugins[0]->get_info()->n_inputs.n_audio();
381 uint32_t out = _plugins[0]->get_info()->n_outputs.n_audio();
385 /* not active, but something has make up for any channel count increase */
387 for (uint32_t n = out - in; n < out; ++n) {
388 memcpy (bufs.get_audio(n).data(nframes, offset), bufs.get_audio(in - 1).data(nframes, offset), sizeof (Sample) * nframes);
392 bufs.count().set_audio(out);
397 PluginInsert::set_parameter (Evoral::Parameter param, float val)
399 if (param.type() != PluginAutomation)
402 /* the others will be set from the event triggered by this */
404 _plugins[0]->set_parameter (param.id(), val);
406 boost::shared_ptr<AutomationControl> ac
407 = boost::dynamic_pointer_cast<AutomationControl>(data().control(param));
412 warning << "set_parameter called for nonexistant parameter "
413 << EventTypeMap::instance().to_symbol(param) << endmsg;
416 _session.set_dirty();
420 PluginInsert::get_parameter (Evoral::Parameter param)
422 if (param.type() != PluginAutomation)
426 _plugins[0]->get_parameter (param.id());
430 PluginInsert::automation_run (BufferSet& bufs, nframes_t nframes, nframes_t offset)
432 Evoral::ControlEvent next_event (0, 0.0f);
433 nframes_t now = _session.transport_frame ();
434 nframes_t end = now + nframes;
436 Glib::Mutex::Lock lm (data().control_lock(), Glib::TRY_LOCK);
439 connect_and_run (bufs, nframes, offset, false);
443 if (!data().find_next_event (now, end, next_event)) {
445 /* no events have a time within the relevant range */
447 connect_and_run (bufs, nframes, offset, true, now);
453 nframes_t cnt = min (((nframes_t) ceil (next_event.when) - now), nframes);
455 connect_and_run (bufs, cnt, offset, true, now);
461 if (!data().find_next_event (now, end, next_event)) {
466 /* cleanup anything that is left to do */
469 connect_and_run (bufs, nframes, offset, true, now);
474 PluginInsert::default_parameter_value (const Evoral::Parameter& param)
476 if (param.type() != PluginAutomation)
479 if (_plugins.empty()) {
480 fatal << _("programming error: ") << X_("PluginInsert::default_parameter_value() called with no plugin")
485 return _plugins[0]->default_value (param.id());
488 boost::shared_ptr<Plugin>
489 PluginInsert::plugin_factory (boost::shared_ptr<Plugin> other)
491 boost::shared_ptr<LadspaPlugin> lp;
493 boost::shared_ptr<LV2Plugin> lv2p;
496 boost::shared_ptr<VSTPlugin> vp;
498 #ifdef HAVE_AUDIOUNITS
499 boost::shared_ptr<AUPlugin> ap;
502 if ((lp = boost::dynamic_pointer_cast<LadspaPlugin> (other)) != 0) {
503 return boost::shared_ptr<Plugin> (new LadspaPlugin (*lp));
505 } else if ((lv2p = boost::dynamic_pointer_cast<LV2Plugin> (other)) != 0) {
506 return boost::shared_ptr<Plugin> (new LV2Plugin (*lv2p));
509 } else if ((vp = boost::dynamic_pointer_cast<VSTPlugin> (other)) != 0) {
510 return boost::shared_ptr<Plugin> (new VSTPlugin (*vp));
512 #ifdef HAVE_AUDIOUNITS
513 } else if ((ap = boost::dynamic_pointer_cast<AUPlugin> (other)) != 0) {
514 return boost::shared_ptr<Plugin> (new AUPlugin (*ap));
518 fatal << string_compose (_("programming error: %1"),
519 X_("unknown plugin type in PluginInsert::plugin_factory"))
522 return boost::shared_ptr<Plugin> ((Plugin*) 0);
526 PluginInsert::configure_io (ChanCount in, ChanCount out)
528 if (set_count (count_for_configuration (in, out)) < 0) {
532 /* if we're running replicated plugins, each plugin has
533 the same i/o configuration and we may need to announce how many
534 output streams there are.
536 if we running a single plugin, we need to configure it.
539 if (_plugins.front()->configure_io (in, out) < 0) {
543 // we don't know the analysis window size, so we must work with the
544 // current buffer size here. each request for data fills in these
545 // buffers and the analyser makes sure it gets enough data for the
547 _signal_analysis_input_bufferset.ensure_buffers (in, session().engine().frames_per_cycle());
548 _signal_analysis_input_bufferset.set_count(in);
550 _signal_analysis_output_bufferset.ensure_buffers(out, session().engine().frames_per_cycle());
551 _signal_analysis_output_bufferset.set_count(out);
554 return Processor::configure_io (in, out);
558 PluginInsert::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
560 if (_plugins.front()->reconfigurable_io()) {
561 /* plugin has flexible I/O, so delegate to it */
562 return _plugins.front()->can_support_io_configuration (in, out);
565 ChanCount outputs = _plugins[0]->get_info()->n_outputs;
566 ChanCount inputs = _plugins[0]->get_info()->n_inputs;
568 if ((inputs.n_total() == 0)
569 || (inputs.n_total() == 1 && outputs == inputs)
570 || (inputs.n_total() == 1 && outputs == inputs
571 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
572 || (inputs.n_midi() == 0 && in.n_midi() == 0)))
578 bool can_replicate = true;
580 /* if number of inputs is a factor of the requested input
581 configuration for every type, we can replicate.
583 for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
584 if (inputs.get(*t) >= in.get(*t) || (inputs.get(*t) % in.get(*t) != 0)) {
585 can_replicate = false;
590 if (!can_replicate || (in.n_total() % inputs.n_total() != 0)) {
594 if (inputs.n_total() == 0) {
595 /* instrument plugin, always legal, but throws away any existing streams */
597 } else if (inputs.n_total() == 1 && outputs == inputs
598 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
599 || (inputs.n_midi() == 0 && in.n_midi() == 0))) {
600 /* mono, single-typed plugin, replicate as needed to match in */
602 } else if (inputs == in) {
606 /* replicate - note that we've already verified that
607 the replication count is constant across all data types.
609 for (DataType::iterator t = DataType::begin(); t != DataType::end(); ++t) {
610 out.set (*t, outputs.get(*t) * (in.get(*t) / inputs.get(*t)));
617 /* Number of plugin instances required to support a given channel configuration.
621 PluginInsert::count_for_configuration (ChanCount in, ChanCount out) const
623 if (_plugins.front()->reconfigurable_io()) {
624 /* plugin has flexible I/O, so the answer is always 1 */
625 /* this could change if we ever decide to replicate AU's */
629 // FIXME: take 'out' into consideration
631 ChanCount outputs = _plugins[0]->get_info()->n_outputs;
632 ChanCount inputs = _plugins[0]->get_info()->n_inputs;
634 if (inputs.n_total() == 0) {
635 /* instrument plugin, always legal, but throws away any existing streams */
639 if (inputs.n_total() == 1 && outputs == inputs
640 && ((inputs.n_audio() == 0 && in.n_audio() == 0)
641 || (inputs.n_midi() == 0 && in.n_midi() == 0))) {
642 /* mono plugin, replicate as needed to match in */
651 // assumes in is valid, so we must be replicating
652 if (inputs.n_total() < in.n_total()
653 && (in.n_total() % inputs.n_total() == 0)) {
655 return in.n_total() / inputs.n_total();
663 PluginInsert::get_state(void)
669 PluginInsert::state (bool full)
671 XMLNode& node = Processor::state (full);
673 node.add_property("type", _plugins[0]->state_node_name());
674 node.add_property("unique-id", _plugins[0]->unique_id());
675 node.add_property("count", string_compose("%1", _plugins.size()));
676 node.add_child_nocopy (_plugins[0]->get_state());
678 /* add port automation state */
679 //XMLNode *autonode = new XMLNode(port_automation_node_name);
680 set<Evoral::Parameter> automatable = _plugins[0]->automatable();
682 for (set<Evoral::Parameter>::iterator x = automatable.begin(); x != automatable.end(); ++x) {
684 /*XMLNode* child = new XMLNode("port");
685 snprintf(buf, sizeof(buf), "%" PRIu32, *x);
686 child->add_property("number", string(buf));
688 child->add_child_nocopy (automation_list (*x).state (full));
689 autonode->add_child_nocopy (*child);
691 //autonode->add_child_nocopy (((AutomationList*)data().control(*x)->list().get())->state (full));
694 //node.add_child_nocopy (*autonode);
700 PluginInsert::set_state(const XMLNode& node)
702 XMLNodeList nlist = node.children();
703 XMLNodeIterator niter;
704 XMLPropertyList plist;
705 const XMLProperty *prop;
706 ARDOUR::PluginType type;
708 if ((prop = node.property ("type")) == 0) {
709 error << _("XML node describing insert is missing the `type' field") << endmsg;
713 if (prop->value() == X_("ladspa") || prop->value() == X_("Ladspa")) { /* handle old school sessions */
714 type = ARDOUR::LADSPA;
715 } else if (prop->value() == X_("lv2")) {
717 } else if (prop->value() == X_("vst")) {
720 error << string_compose (_("unknown plugin type %1 in plugin insert state"),
726 prop = node.property ("unique-id");
728 error << _("Plugin has no unique ID field") << endmsg;
732 boost::shared_ptr<Plugin> plugin;
734 plugin = find_plugin (_session, prop->value(), type);
737 error << string_compose(_("Found a reference to a plugin (\"%1\") that is unknown.\n"
738 "Perhaps it was removed or moved since it was last used."), prop->value())
745 if ((prop = node.property ("count")) != 0) {
746 sscanf (prop->value().c_str(), "%u", &count);
749 if (_plugins.size() != count) {
751 _plugins.push_back (plugin);
753 for (uint32_t n=1; n < count; ++n) {
754 _plugins.push_back (plugin_factory (plugin));
758 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
759 if ((*niter)->name() == plugin->state_node_name()) {
760 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugins.begin(); i != _plugins.end(); ++i) {
761 (*i)->set_state (**niter);
767 const XMLNode* insert_node = &node;
769 // legacy sessions: search for child IOProcessor node
770 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
771 if ((*niter)->name() == "IOProcessor") {
772 insert_node = *niter;
777 Processor::set_state (*insert_node);
779 /* look for port automation node */
781 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
783 if ((*niter)->name() != port_automation_node_name) {
789 XMLNodeConstIterator iter;
794 cnodes = (*niter)->children ("Port");
796 for(iter = cnodes.begin(); iter != cnodes.end(); ++iter){
800 if ((cprop = child->property("number")) != 0) {
801 port = cprop->value().c_str();
803 warning << _("PluginInsert: Auto: no plugin port number") << endmsg;
807 sscanf (port, "%" PRIu32, &port_id);
809 if (port_id >= _plugins[0]->parameter_count()) {
810 warning << _("PluginInsert: Auto: port id out of range") << endmsg;
814 boost::shared_ptr<AutomationControl> c = boost::dynamic_pointer_cast<AutomationControl>(
815 data().control(Evoral::Parameter(PluginAutomation, 0, port_id), true));
817 if (!child->children().empty()) {
818 c->alist()->set_state (*child->children().front());
820 if ((cprop = child->property("auto")) != 0) {
825 sscanf (cprop->value().c_str(), "0x%x", &x);
826 c->alist()->set_automation_state (AutoState (x));
832 c->alist()->set_automation_state (Off);
843 if (niter == nlist.end()) {
844 warning << string_compose(_("XML node describing a port automation is missing the `%1' information"), port_automation_node_name) << endmsg;
847 // The name of the PluginInsert comes from the plugin, nothing else
848 _name = plugin->get_info()->name;
854 PluginInsert::describe_parameter (Evoral::Parameter param)
856 if (param.type() != PluginAutomation)
857 return Automatable::describe_parameter(param);
859 return _plugins[0]->describe_parameter (param);
863 PluginInsert::signal_latency() const
866 return _user_latency;
869 return _plugins[0]->signal_latency ();
873 PluginInsert::type ()
875 boost::shared_ptr<LadspaPlugin> lp;
877 boost::shared_ptr<VSTPlugin> vp;
879 #ifdef HAVE_AUDIOUNITS
880 boost::shared_ptr<AUPlugin> ap;
883 PluginPtr other = plugin ();
885 if ((lp = boost::dynamic_pointer_cast<LadspaPlugin> (other)) != 0) {
886 return ARDOUR::LADSPA;
888 } else if ((vp = boost::dynamic_pointer_cast<VSTPlugin> (other)) != 0) {
891 #ifdef HAVE_AUDIOUNITS
892 } else if ((ap = boost::dynamic_pointer_cast<AUPlugin> (other)) != 0) {
893 return ARDOUR::AudioUnit;
897 return (ARDOUR::PluginType) 0;
901 PluginInsert::PluginControl::PluginControl (PluginInsert* p, const Evoral::Parameter ¶m, boost::shared_ptr<AutomationList> list)
902 : AutomationControl (p->session(), param, list, p->describe_parameter(param))
905 Plugin::ParameterDescriptor desc;
906 p->plugin(0)->get_parameter_descriptor (param.id(), desc);
907 _logarithmic = desc.logarithmic;
908 _toggled = desc.toggled;
912 PluginInsert::PluginControl::set_value (float val)
914 /* FIXME: probably should be taking out some lock here.. */
924 /*const float range = _list->get_max_y() - _list->get_min_y();
925 const float lower = _list->get_min_y();
928 val = lower + (range * val);
930 float log_lower = 0.0f;
932 log_lower = log(lower);
935 val = exp(log_lower + log(range) * val);
940 for (vector<boost::shared_ptr<Plugin> >::iterator i = _plugin->_plugins.begin();
941 i != _plugin->_plugins.end(); ++i) {
942 (*i)->set_parameter (_list->parameter().id(), val);
945 boost::shared_ptr<Plugin> iasp = _plugin->_impulseAnalysisPlugin.lock();
947 iasp->set_parameter (_list->parameter().id(), val);
950 AutomationControl::set_value(val);
954 PluginInsert::PluginControl::get_value (void) const
956 /* FIXME: probably should be taking out some lock here.. */
958 float val = _plugin->get_parameter (_list->parameter());
972 return ((val - lower) / range);
976 boost::shared_ptr<Plugin>
977 PluginInsert::get_impulse_analysis_plugin()
979 boost::shared_ptr<Plugin> ret;
980 if (_impulseAnalysisPlugin.expired()) {
981 ret = plugin_factory(_plugins[0]);
982 _impulseAnalysisPlugin = ret;
984 ret = _impulseAnalysisPlugin.lock();