2 Copyright (C) 2008-2011 Paul Davis
3 Author: David Robillard
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
30 #include "pbd/compose.h"
31 #include "pbd/error.h"
32 #include "pbd/pathscanner.h"
33 #include "pbd/xml++.h"
35 #include "ardour/ardour.h"
36 #include "ardour/audio_buffer.h"
37 #include "ardour/audioengine.h"
38 #include "ardour/lv2_event_buffer.h"
39 #include "ardour/lv2_plugin.h"
40 #include "ardour/session.h"
42 #include "pbd/stl_delete.h"
47 #include "lv2ext/lv2_persist.h"
48 #include "lv2_pfile.h"
50 #define NS_DC "http://dublincore.org/documents/dcmi-namespace/"
51 #define NS_LV2 "http://lv2plug.in/ns/lv2core#"
52 #define NS_PSET "http://lv2plug.in/ns/dev/presets#"
53 #define NS_UI "http://lv2plug.in/ns/extensions/ui#"
56 using namespace ARDOUR;
59 URIMap LV2Plugin::_uri_map;
60 uint32_t LV2Plugin::_midi_event_type = _uri_map.uri_to_id (
61 "http://lv2plug.in/ns/ext/event",
62 "http://lv2plug.in/ns/ext/midi#MidiEvent");
64 LV2Plugin::LV2Plugin (AudioEngine& engine,
69 : Plugin (engine, session)
73 init (world, plugin, rate);
76 LV2Plugin::LV2Plugin (const LV2Plugin &other)
78 , _world(other._world)
81 init (other._world, other._plugin, other._sample_rate);
83 for (uint32_t i = 0; i < parameter_count(); ++i) {
84 _control_data[i] = other._shadow_data[i];
85 _shadow_data[i] = other._shadow_data[i];
90 LV2Plugin::init (LV2World& world, SLV2Plugin plugin, framecnt_t rate)
97 _latency_control_port = 0;
98 _was_activated = false;
100 _instance_access_feature.URI = "http://lv2plug.in/ns/ext/instance-access";
101 _data_access_feature.URI = "http://lv2plug.in/ns/ext/data-access";
102 _persist_feature.URI = "http://lv2plug.in/ns/ext/persist";
103 _persist_feature.data = NULL;
105 SLV2Value persist_uri = slv2_value_new_uri(_world.world, _persist_feature.URI);
106 _supports_persist = slv2_plugin_has_feature(plugin, persist_uri);
107 slv2_value_free(persist_uri);
109 _features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * 5);
110 _features[0] = &_instance_access_feature;
111 _features[1] = &_data_access_feature;
112 _features[2] = &_persist_feature;
113 _features[3] = _uri_map.feature();
116 _instance = slv2_plugin_instantiate(plugin, rate, _features);
117 _name = slv2_plugin_get_name(plugin);
118 _author = slv2_plugin_get_author_name(plugin);
120 if (_instance == 0) {
121 error << _("LV2: Failed to instantiate plugin ")
122 << slv2_value_as_string (slv2_plugin_get_uri(plugin)) << endmsg;
123 throw failed_constructor();
126 _instance_access_feature.data = (void*)_instance->lv2_handle;
127 _data_access_extension_data.extension_data = _instance->lv2_descriptor->extension_data;
128 _data_access_feature.data = &_data_access_extension_data;
130 if (slv2_plugin_has_feature(plugin, world.in_place_broken)) {
131 error << string_compose(
132 _("LV2: \"%1\" cannot be used, since it cannot do inplace processing"),
133 slv2_value_as_string(_name)) << endmsg;
134 slv2_value_free(_name);
135 slv2_value_free(_author);
136 throw failed_constructor();
141 const uint32_t num_ports = slv2_plugin_get_num_ports(plugin);
142 const bool latent = slv2_plugin_has_latency(plugin);
143 const uint32_t latency_port = (latent)
144 ? slv2_plugin_get_latency_port_index(plugin)
147 _control_data = new float[num_ports];
148 _shadow_data = new float[num_ports];
149 _defaults = new float[num_ports];
151 for (uint32_t i = 0; i < num_ports; ++i) {
152 SLV2Port port = slv2_plugin_get_port_by_index(plugin, i);
153 SLV2Value sym = slv2_port_get_symbol(_plugin, port);
154 _port_indices.insert(std::make_pair(slv2_value_as_string(sym), i));
155 if (parameter_is_control(i)) {
157 slv2_port_get_range(plugin, port, &def, NULL, NULL);
158 _defaults[i] = def ? slv2_value_as_float(def) : 0.0f;
159 slv2_value_free(def);
161 slv2_instance_connect_port (_instance, i, &_control_data[i]);
163 if (latent && i == latency_port) {
164 _latency_control_port = &_control_data[i];
165 *_latency_control_port = 0;
168 if (parameter_is_input(i)) {
169 _shadow_data[i] = default_value (i);
176 SLV2UIs uis = slv2_plugin_get_uis(_plugin);
177 if (slv2_uis_size(uis) > 0) {
178 for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
179 SLV2UI ui = slv2_uis_get_at(uis, i);
180 if (slv2_ui_is_a(ui, _world.gtk_gui)) {
186 // if gtk gui is not available, try to find external gui
188 for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
189 SLV2UI ui = slv2_uis_get_at(uis, i);
190 if (slv2_ui_is_a(ui, _world.external_gui)) {
198 latency_compute_run ();
201 LV2Plugin::~LV2Plugin ()
206 slv2_instance_free(_instance);
207 slv2_value_free(_name);
208 slv2_value_free(_author);
210 delete [] _control_data;
211 delete [] _shadow_data;
215 LV2Plugin::is_external_ui() const
217 return slv2_ui_is_a(_ui, _world.external_gui);
221 LV2Plugin::unique_id() const
223 return slv2_value_as_uri(slv2_plugin_get_uri(_plugin));
228 LV2Plugin::default_value (uint32_t port)
230 return _defaults[port];
234 LV2Plugin::port_symbol (uint32_t index) const
236 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, index);
238 error << name() << ": Invalid port index " << index << endmsg;
241 SLV2Value sym = slv2_port_get_symbol(_plugin, port);
242 return slv2_value_as_string(sym);
247 LV2Plugin::set_parameter (uint32_t which, float val)
249 if (which < slv2_plugin_get_num_ports(_plugin)) {
250 _shadow_data[which] = val;
252 warning << string_compose (
253 _("Illegal parameter number used with plugin \"%1\". "
254 "This is a bug in either %2 or the LV2 plugin (%3)"),
255 name(), PROGRAM_NAME, unique_id()) << endmsg;
258 Plugin::set_parameter (which, val);
262 LV2Plugin::get_parameter (uint32_t which) const
264 if (parameter_is_input(which)) {
265 return (float) _shadow_data[which];
267 return (float) _control_data[which];
273 LV2Plugin::nth_parameter (uint32_t n, bool& ok) const
276 for (uint32_t c = 0, x = 0; x < slv2_plugin_get_num_ports (_plugin); ++x) {
277 if (parameter_is_control (x)) {
289 LV2Plugin::lv2_persist_store_callback(void* callback_data,
295 LV2PFile file = (LV2PFile)callback_data;
297 // FIXME: assumes URIs are mapped in the default context (or not event, at least)
298 const char* type_uri = LV2Plugin::_uri_map.id_to_uri(NULL, type);
299 cout << "LV2 PERSIST STORE " << key << " = " << value << " :: " << type_uri << endl;
300 lv2_pfile_write(file, key, value, size, type_uri);
304 LV2Plugin::lv2_persist_retrieve_callback(void* callback_data,
309 //LV2PFile file = (LV2PFile)callback_data;
310 cout << "LV2 PERSIST RETRIEVE " << key << endl;
315 LV2Plugin::add_state (XMLNode* root) const
319 LocaleGuard lg (X_("POSIX"));
321 for (uint32_t i = 0; i < parameter_count(); ++i){
322 if (parameter_is_input(i) && parameter_is_control(i)) {
323 child = new XMLNode("Port");
324 child->add_property("symbol", port_symbol(i));
325 snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
326 child->add_property("value", string(buf));
327 root->add_child_nocopy (*child);
331 if (_supports_persist) {
332 // Create state directory for this plugin instance
333 const std::string state_filename = _id.to_s() + ".lv2pfile";
334 const std::string state_path = Glib::build_filename(
335 _session.plugins_dir(), state_filename);
337 cout << "Saving LV2 plugin state to " << state_path << endl;
339 // Get LV2 Persist extension data from plugin instance
340 LV2_Persist* persist = (LV2_Persist*)slv2_instance_get_extension_data(
341 _instance, "http://lv2plug.in/ns/ext/persist");
343 warning << string_compose(
344 _("Plugin \"%1\% failed to return LV2 persist data"),
349 LV2PFile file = lv2_pfile_open(state_path.c_str(), true);
350 persist->save(_instance->lv2_handle, &LV2Plugin::lv2_persist_store_callback, file);
351 lv2_pfile_close(file);
353 root->add_property("state-file", state_filename);
357 static inline SLV2Value
358 get_value(SLV2Plugin p, SLV2Value subject, SLV2Value predicate)
360 SLV2Values vs = slv2_plugin_get_value_for_subject(p, subject, predicate);
361 return vs ? slv2_values_get_at(vs, 0) : NULL;
365 LV2Plugin::find_presets ()
367 SLV2Value dc_title = slv2_value_new_uri(_world.world, NS_DC "title");
368 SLV2Value pset_hasPreset = slv2_value_new_uri(_world.world, NS_PSET "hasPreset");
370 SLV2Values presets = slv2_plugin_get_value(_plugin, pset_hasPreset);
371 for (unsigned i = 0; i < slv2_values_size(presets); ++i) {
372 SLV2Value preset = slv2_values_get_at(presets, i);
373 SLV2Value name = get_value(_plugin, preset, dc_title);
375 _presets.insert(std::make_pair(slv2_value_as_string(preset),
377 slv2_value_as_string(preset),
378 slv2_value_as_string(name))));
380 warning << string_compose(
381 _("Plugin \"%1\% preset \"%2%\" is missing a dc:title\n"),
382 unique_id(), slv2_value_as_string(preset));
385 slv2_values_free(presets);
387 slv2_value_free(pset_hasPreset);
388 slv2_value_free(dc_title);
392 LV2Plugin::load_preset (PresetRecord r)
394 Plugin::load_preset (r);
397 // New (>= 0.7.0) slv2 no longer supports SPARQL, but exposes blank nodes
398 // so querying ports is possible with the simple API
399 SLV2Value lv2_port = slv2_value_new_uri(_world.world, NS_LV2 "port");
400 SLV2Value lv2_symbol = slv2_value_new_uri(_world.world, NS_LV2 "symbol");
401 SLV2Value pset_value = slv2_value_new_uri(_world.world, NS_PSET "value");
402 SLV2Value preset = slv2_value_new_uri(_world.world, r.uri.c_str());
404 SLV2Values ports = slv2_plugin_get_value_for_subject(_plugin, preset, lv2_port);
405 for (unsigned i = 0; i < slv2_values_size(ports); ++i) {
406 SLV2Value port = slv2_values_get_at(ports, i);
407 SLV2Value symbol = get_value(_plugin, port, lv2_symbol);
408 SLV2Value value = get_value(_plugin, port, pset_value);
409 if (value && slv2_value_is_float(value)) {
410 set_parameter(_port_indices[slv2_value_as_string(symbol)],
411 slv2_value_as_float(value));
414 slv2_values_free(ports);
416 slv2_value_free(preset);
417 slv2_value_free(pset_value);
418 slv2_value_free(lv2_symbol);
419 slv2_value_free(lv2_port);
421 const string query = string(
422 "PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
423 "PREFIX dc: <http://dublincore.org/documents/dcmi-namespace/>\n"
424 "SELECT ?sym ?val WHERE { <") + r.uri + "> lv2:port ?port . "
425 " ?port lv2:symbol ?sym ; lv2p:value ?val . }";
426 SLV2Results values = slv2_plugin_query_sparql(_plugin, query.c_str());
427 for (; !slv2_results_finished(values); slv2_results_next(values)) {
428 SLV2Value sym = slv2_results_get_binding_value(values, 0);
429 SLV2Value val = slv2_results_get_binding_value(values, 1);
430 if (slv2_value_is_float(val)) {
431 uint32_t index = _port_indices[slv2_value_as_string(sym)];
432 set_parameter(index, slv2_value_as_float(val));
435 slv2_results_free(values);
441 LV2Plugin::do_save_preset (string /*name*/)
447 LV2Plugin::do_remove_preset (string /*name*/)
453 LV2Plugin::has_editor() const
455 return (_ui != NULL);
459 LV2Plugin::set_state(const XMLNode& node, int version)
462 const XMLProperty* prop;
463 XMLNodeConstIterator iter;
468 LocaleGuard lg(X_("POSIX"));
470 if (node.name() != state_node_name()) {
471 error << _("Bad node sent to LV2Plugin::set_state") << endmsg;
476 nodes = node.children ("port");
478 nodes = node.children ("Port");
481 for (iter = nodes.begin(); iter != nodes.end(); ++iter){
485 if ((prop = child->property("symbol")) != 0) {
486 sym = prop->value().c_str();
488 warning << _("LV2: port has no symbol, ignored") << endmsg;
492 map<string,uint32_t>::iterator i = _port_indices.find(sym);
494 if (i != _port_indices.end()) {
497 warning << _("LV2: port has unknown index, ignored") << endmsg;
501 if ((prop = child->property("value")) != 0) {
502 value = prop->value().c_str();
504 warning << _("LV2: port has no value, ignored") << endmsg;
508 set_parameter (port_id, atof(value));
511 if ((prop = node.property("state-file")) != 0) {
512 std::string state_path = Glib::build_filename(_session.plugins_dir(),
515 // Get LV2 Persist extension data from plugin instance
516 LV2_Persist* persist = (LV2_Persist*)slv2_instance_get_extension_data(
517 _instance, "http://lv2plug.in/ns/ext/persist");
519 cout << "Loading LV2 state from " << state_path << endl;
520 LV2PFile file = lv2_pfile_open(state_path.c_str(), false);
521 persist->restore(_instance->lv2_handle,
522 &LV2Plugin::lv2_persist_retrieve_callback,
524 lv2_pfile_close(file);
526 warning << string_compose(
527 _("Plugin \"%1\% failed to return LV2 persist data"),
532 latency_compute_run ();
534 return Plugin::set_state (node, version);
538 LV2Plugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const
540 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, which);
542 SLV2Value def, min, max;
543 slv2_port_get_range(_plugin, port, &def, &min, &max);
545 desc.integer_step = slv2_port_has_property(_plugin, port, _world.integer);
546 desc.toggled = slv2_port_has_property(_plugin, port, _world.toggled);
547 desc.logarithmic = slv2_port_has_property(_plugin, port, _world.logarithmic);
548 desc.sr_dependent = slv2_port_has_property(_plugin, port, _world.srate);
549 desc.label = slv2_value_as_string(slv2_port_get_name(_plugin, port));
550 desc.lower = min ? slv2_value_as_float(min) : 0.0f;
551 desc.upper = max ? slv2_value_as_float(max) : 1.0f;
552 desc.min_unbound = false; // TODO: LV2 extension required
553 desc.max_unbound = false; // TODO: LV2 extension required
555 if (desc.integer_step) {
557 desc.smallstep = 0.1;
558 desc.largestep = 10.0;
560 const float delta = desc.upper - desc.lower;
561 desc.step = delta / 1000.0f;
562 desc.smallstep = delta / 10000.0f;
563 desc.largestep = delta/10.0f;
566 slv2_value_free(def);
567 slv2_value_free(min);
568 slv2_value_free(max);
575 LV2Plugin::describe_parameter (Evoral::Parameter which)
577 if (which.type() == PluginAutomation && which.id() < parameter_count()) {
578 SLV2Value name = slv2_port_get_name(_plugin,
579 slv2_plugin_get_port_by_index(_plugin, which.id()));
580 string ret(slv2_value_as_string(name));
581 slv2_value_free(name);
589 LV2Plugin::signal_latency () const
591 if (_latency_control_port) {
592 return (framecnt_t) floor (*_latency_control_port);
598 set<Evoral::Parameter>
599 LV2Plugin::automatable () const
601 set<Evoral::Parameter> ret;
603 for (uint32_t i = 0; i < parameter_count(); ++i){
604 if (parameter_is_input(i) && parameter_is_control(i)) {
605 ret.insert (ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
613 LV2Plugin::activate ()
615 if (!_was_activated) {
616 slv2_instance_activate (_instance);
617 _was_activated = true;
622 LV2Plugin::deactivate ()
624 if (_was_activated) {
625 slv2_instance_deactivate (_instance);
626 _was_activated = false;
631 LV2Plugin::cleanup ()
635 slv2_instance_free (_instance);
640 LV2Plugin::connect_and_run (BufferSet& bufs,
641 ChanMapping in_map, ChanMapping out_map,
642 pframes_t nframes, framecnt_t offset)
644 Plugin::connect_and_run (bufs, in_map, out_map, nframes, offset);
646 cycles_t then = get_cycles ();
648 uint32_t audio_in_index = 0;
649 uint32_t audio_out_index = 0;
650 uint32_t midi_in_index = 0;
651 uint32_t midi_out_index = 0;
652 for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
653 if (parameter_is_audio(port_index)) {
654 if (parameter_is_input(port_index)) {
655 const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++);
656 //cerr << port_index << " : " << " AUDIO IN " << buf_index << endl;
657 slv2_instance_connect_port(_instance, port_index,
658 bufs.get_audio(buf_index).data(offset));
659 } else if (parameter_is_output(port_index)) {
660 const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++);
661 //cerr << port_index << " : " << " AUDIO OUT " << buf_index << endl;
662 slv2_instance_connect_port(_instance, port_index,
663 bufs.get_audio(buf_index).data(offset));
665 } else if (parameter_is_midi(port_index)) {
666 if (parameter_is_input(port_index)) {
667 const uint32_t buf_index = in_map.get(DataType::MIDI, midi_in_index++);
668 //cerr << port_index << " : " << " MIDI IN " << buf_index << endl;
669 slv2_instance_connect_port(_instance, port_index,
670 bufs.get_lv2_midi(true, buf_index).data());
671 } else if (parameter_is_output(port_index)) {
672 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
673 //cerr << port_index << " : " << " MIDI OUT " << buf_index << endl;
674 slv2_instance_connect_port(_instance, port_index,
675 bufs.get_lv2_midi(false, buf_index).data());
677 } else if (!parameter_is_control(port_index)) {
678 // Optional port (it'd better be if we've made it this far...)
679 slv2_instance_connect_port(_instance, port_index, NULL);
686 for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
687 if (parameter_is_midi(port_index) && parameter_is_output(port_index)) {
688 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
689 bufs.flush_lv2_midi(true, buf_index);
693 cycles_t now = get_cycles ();
694 set_cycles ((uint32_t) (now - then));
700 LV2Plugin::parameter_is_control (uint32_t param) const
702 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
703 return slv2_port_is_a(_plugin, port, _world.control_class);
707 LV2Plugin::parameter_is_audio (uint32_t param) const
709 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
710 return slv2_port_is_a(_plugin, port, _world.audio_class);
714 LV2Plugin::parameter_is_midi (uint32_t param) const
716 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
717 return slv2_port_is_a(_plugin, port, _world.event_class);
718 // && slv2_port_supports_event(_plugin, port, _world.midi_class);
722 LV2Plugin::parameter_is_output (uint32_t param) const
724 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
725 return slv2_port_is_a(_plugin, port, _world.output_class);
729 LV2Plugin::parameter_is_input (uint32_t param) const
731 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
732 return slv2_port_is_a(_plugin, port, _world.input_class);
736 LV2Plugin::print_parameter (uint32_t param, char* buf, uint32_t len) const
739 if (param < parameter_count()) {
740 snprintf (buf, len, "%.3f", get_parameter (param));
748 LV2Plugin::run (pframes_t nframes)
750 for (uint32_t i = 0; i < parameter_count(); ++i) {
751 if (parameter_is_control(i) && parameter_is_input(i)) {
752 _control_data[i] = _shadow_data[i];
756 slv2_instance_run(_instance, nframes);
760 LV2Plugin::latency_compute_run ()
762 if (!_latency_control_port) {
766 /* we need to run the plugin so that it can set its latency
772 uint32_t port_index = 0;
773 uint32_t in_index = 0;
774 uint32_t out_index = 0;
776 const framecnt_t bufsize = 1024;
777 float buffer[bufsize];
779 memset(buffer, 0, sizeof(float) * bufsize);
781 // FIXME: Ensure plugins can handle in-place processing
785 while (port_index < parameter_count()) {
786 if (parameter_is_audio (port_index)) {
787 if (parameter_is_input (port_index)) {
788 slv2_instance_connect_port (_instance, port_index, buffer);
790 } else if (parameter_is_output (port_index)) {
791 slv2_instance_connect_port (_instance, port_index, buffer);
803 : world(slv2_world_new())
805 slv2_world_load_all(world);
806 input_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_INPUT);
807 output_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_OUTPUT);
808 control_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_CONTROL);
809 audio_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_AUDIO);
810 event_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_EVENT);
811 midi_class = slv2_value_new_uri(world, SLV2_EVENT_CLASS_MIDI);
812 in_place_broken = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "inPlaceBroken");
813 integer = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "integer");
814 toggled = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "toggled");
815 srate = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "sampleRate");
816 gtk_gui = slv2_value_new_uri(world, NS_UI "GtkUI");
817 external_gui = slv2_value_new_uri(world, NS_UI "external");
818 logarithmic = slv2_value_new_uri(world, "http://lv2plug.in/ns/dev/extportinfo#logarithmic");
821 LV2World::~LV2World()
823 slv2_value_free(input_class);
824 slv2_value_free(output_class);
825 slv2_value_free(control_class);
826 slv2_value_free(audio_class);
827 slv2_value_free(event_class);
828 slv2_value_free(midi_class);
829 slv2_value_free(in_place_broken);
832 LV2PluginInfo::LV2PluginInfo (void* lv2_world, void* slv2_plugin)
833 : _lv2_world(lv2_world)
834 , _slv2_plugin(slv2_plugin)
839 LV2PluginInfo::~LV2PluginInfo()
844 LV2PluginInfo::load (Session& session)
849 plugin.reset (new LV2Plugin (session.engine(), session,
850 *(LV2World*)_lv2_world, (SLV2Plugin)_slv2_plugin, session.frame_rate()));
852 plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this)));
856 catch (failed_constructor &err) {
857 return PluginPtr ((Plugin*) 0);
864 LV2PluginInfo::discover (void* lv2_world)
866 PluginInfoList* plugs = new PluginInfoList;
867 LV2World* world = (LV2World*)lv2_world;
868 SLV2Plugins plugins = slv2_world_get_all_plugins(world->world);
870 cerr << "LV2: Discovering " << slv2_plugins_size (plugins) << " plugins" << endl;
872 for (unsigned i=0; i < slv2_plugins_size(plugins); ++i) {
873 SLV2Plugin p = slv2_plugins_get_at(plugins, i);
874 LV2PluginInfoPtr info (new LV2PluginInfo(lv2_world, p));
876 SLV2Value name = slv2_plugin_get_name(p);
879 cerr << "LV2: invalid plugin\n";
885 info->name = string(slv2_value_as_string(name));
886 slv2_value_free(name);
888 SLV2PluginClass pclass = slv2_plugin_get_class(p);
889 SLV2Value label = slv2_plugin_class_get_label(pclass);
890 info->category = slv2_value_as_string(label);
892 SLV2Value author_name = slv2_plugin_get_author_name(p);
893 info->creator = author_name ? string(slv2_value_as_string(author_name)) : "Unknown";
894 slv2_value_free(author_name);
896 info->path = "/NOPATH"; // Meaningless for LV2
898 info->n_inputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
899 world->input_class, world->audio_class, NULL));
900 info->n_inputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
901 world->input_class, world->event_class, NULL));
903 info->n_outputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
904 world->output_class, world->audio_class, NULL));
905 info->n_outputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
906 world->output_class, world->event_class, NULL));
908 info->unique_id = slv2_value_as_uri(slv2_plugin_get_uri(p));
909 info->index = 0; // Meaningless for LV2
911 plugs->push_back (info);
914 cerr << "Done LV2 discovery" << endl;