2 Copyright (C) 2008-2010 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/session.h"
37 #include "ardour/audioengine.h"
38 #include "ardour/audio_buffer.h"
39 #include "ardour/lv2_event_buffer.h"
40 #include "ardour/lv2_plugin.h"
42 #include "pbd/stl_delete.h"
47 #include "lv2ext/lv2_persist.h"
48 #include "lv2_pfile.h"
51 using namespace ARDOUR;
54 URIMap LV2Plugin::_uri_map;
55 uint32_t LV2Plugin::_midi_event_type = _uri_map.uri_to_id(
56 "http://lv2plug.in/ns/ext/event",
57 "http://lv2plug.in/ns/ext/midi#MidiEvent");
59 LV2Plugin::LV2Plugin (AudioEngine& e, Session& session, LV2World& world, SLV2Plugin plugin, framecnt_t rate)
64 init (world, plugin, rate);
67 LV2Plugin::LV2Plugin (const LV2Plugin &other)
69 , _world(other._world)
72 init (other._world, other._plugin, other._sample_rate);
74 for (uint32_t i = 0; i < parameter_count(); ++i) {
75 _control_data[i] = other._shadow_data[i];
76 _shadow_data[i] = other._shadow_data[i];
81 LV2Plugin::init (LV2World& world, SLV2Plugin plugin, framecnt_t rate)
88 _latency_control_port = 0;
89 _was_activated = false;
91 _instance_access_feature.URI = "http://lv2plug.in/ns/ext/instance-access";
92 _data_access_feature.URI = "http://lv2plug.in/ns/ext/data-access";
93 _persist_feature.URI = "http://lv2plug.in/ns/ext/persist";
94 _persist_feature.data = NULL;
96 SLV2Value persist_uri = slv2_value_new_uri(_world.world, _persist_feature.URI);
97 _supports_persist = slv2_plugin_has_feature(plugin, persist_uri);
98 slv2_value_free(persist_uri);
100 _features = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * 5);
101 _features[0] = &_instance_access_feature;
102 _features[1] = &_data_access_feature;
103 _features[2] = &_persist_feature;
104 _features[3] = _uri_map.feature();
107 _instance = slv2_plugin_instantiate(plugin, rate, _features);
108 _name = slv2_plugin_get_name(plugin);
109 _author = slv2_plugin_get_author_name(plugin);
111 if (_instance == 0) {
112 error << _("LV2: Failed to instantiate plugin ") << slv2_plugin_get_uri(plugin) << endl;
113 throw failed_constructor();
116 _instance_access_feature.data = (void*)_instance->lv2_handle;
117 _data_access_extension_data.extension_data = _instance->lv2_descriptor->extension_data;
118 _data_access_feature.data = &_data_access_extension_data;
120 if (slv2_plugin_has_feature(plugin, world.in_place_broken)) {
121 error << string_compose(
122 _("LV2: \"%1\" cannot be used, since it cannot do inplace processing"),
123 slv2_value_as_string(_name));
124 slv2_value_free(_name);
125 slv2_value_free(_author);
126 throw failed_constructor();
131 const bool latent = slv2_plugin_has_latency(plugin);
132 uint32_t latency_port = (latent ? slv2_plugin_get_latency_port_index(plugin) : 0);
133 const uint32_t num_ports = slv2_plugin_get_num_ports(plugin);
135 _control_data = new float[num_ports];
136 _shadow_data = new float[num_ports];
137 _defaults = new float[num_ports];
139 for (uint32_t i = 0; i < num_ports; ++i) {
140 SLV2Port port = slv2_plugin_get_port_by_index(plugin, i);
141 SLV2Value sym = slv2_port_get_symbol(_plugin, port);
142 _port_indices.insert(std::make_pair(slv2_value_as_string(sym), i));
143 if (parameter_is_control(i)) {
145 slv2_port_get_range(plugin, port, &def, NULL, NULL);
146 _defaults[i] = def ? slv2_value_as_float(def) : 0.0f;
147 slv2_value_free(def);
149 slv2_instance_connect_port (_instance, i, &_control_data[i]);
151 if (latent && i == latency_port) {
152 _latency_control_port = &_control_data[i];
153 *_latency_control_port = 0;
156 if (parameter_is_input(i)) {
157 _shadow_data[i] = default_value (i);
164 SLV2UIs uis = slv2_plugin_get_uis(_plugin);
165 if (slv2_uis_size(uis) > 0) {
166 for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
167 SLV2UI ui = slv2_uis_get_at(uis, i);
168 if (slv2_ui_is_a(ui, _world.gtk_gui)) {
174 // if gtk gui is not available, try to find external gui
176 for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
177 SLV2UI ui = slv2_uis_get_at(uis, i);
178 if (slv2_ui_is_a(ui, _world.external_gui)) {
186 latency_compute_run ();
189 LV2Plugin::~LV2Plugin ()
194 slv2_instance_free(_instance);
195 slv2_value_free(_name);
196 slv2_value_free(_author);
198 delete [] _control_data;
199 delete [] _shadow_data;
203 LV2Plugin::is_external_ui() const
205 return slv2_ui_is_a(_ui, _world.external_gui);
209 LV2Plugin::unique_id() const
211 return slv2_value_as_uri(slv2_plugin_get_uri(_plugin));
216 LV2Plugin::default_value (uint32_t port)
218 return _defaults[port];
222 LV2Plugin::port_symbol (uint32_t index) const
224 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, index);
226 error << name() << ": Invalid port index " << index << endmsg;
229 SLV2Value sym = slv2_port_get_symbol(_plugin, port);
230 return slv2_value_as_string(sym);
235 LV2Plugin::set_parameter (uint32_t which, float val)
237 if (which < slv2_plugin_get_num_ports(_plugin)) {
238 _shadow_data[which] = val;
241 if (which < parameter_count() && controls[which]) {
242 controls[which]->Changed ();
247 warning << string_compose (_("Illegal parameter number used with plugin \"%1\"."
248 "This is a bug in either %2 or the LV2 plugin (%3)"),
249 name(), PROGRAM_NAME, unique_id()) << endmsg;
252 Plugin::set_parameter (which, val);
256 LV2Plugin::get_parameter (uint32_t which) const
258 if (parameter_is_input(which)) {
259 return (float) _shadow_data[which];
261 return (float) _control_data[which];
267 LV2Plugin::nth_parameter (uint32_t n, bool& ok) const
273 for (c = 0, x = 0; x < slv2_plugin_get_num_ports(_plugin); ++x) {
274 if (parameter_is_control (x)) {
286 LV2Plugin::lv2_persist_store_callback(void* callback_data,
292 LV2PFile file = (LV2PFile)callback_data;
294 // FIXME: assumes URIs are mapped in the default context (or not event, at least)
295 const char* type_uri = LV2Plugin::_uri_map.id_to_uri(NULL, type);
296 cout << "LV2 PERSIST STORE " << key << " = " << value << " :: " << type_uri << endl;
297 lv2_pfile_write(file, key, value, size, type_uri);
301 LV2Plugin::lv2_persist_retrieve_callback(void* callback_data,
306 //LV2PFile file = (LV2PFile)callback_data;
307 cout << "LV2 PERSIST RETRIEVE " << key << endl;
312 LV2Plugin::add_state (XMLNode* root) const
316 LocaleGuard lg (X_("POSIX"));
318 for (uint32_t i = 0; i < parameter_count(); ++i){
320 if (parameter_is_input(i) && parameter_is_control(i)) {
321 child = new XMLNode("Port");
322 /*snprintf(buf, sizeof(buf), "%u", i);
323 child->add_property("number", string(buf));*/
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);
329 /*if (i < controls.size() && controls[i]) {
330 root->add_child_nocopy (controls[i]->get_state());
335 if (_supports_persist) {
336 // Create state directory for this plugin instance
337 const std::string state_filename = _id.to_s() + ".lv2pfile";
338 const std::string state_path = Glib::build_filename(
339 _session.plugins_dir(), state_filename);
341 cout << "Saving LV2 plugin state to " << state_path << endl;
343 // Get LV2 Persist extension data from plugin instance
344 LV2_Persist* persist = (LV2_Persist*)slv2_instance_get_extension_data(
345 _instance, "http://lv2plug.in/ns/ext/persist");
347 warning << string_compose(
348 _("Plugin \"%1\% failed to return LV2 persist data"),
353 LV2PFile file = lv2_pfile_open(state_path.c_str(), true);
354 persist->save(_instance->lv2_handle, &LV2Plugin::lv2_persist_store_callback, file);
355 lv2_pfile_close(file);
357 root->add_property("state-file", state_filename);
361 #define NS_DC "http://dublincore.org/documents/dcmi-namespace/"
362 #define NS_LV2 "http://lv2plug.in/ns/lv2core#"
363 #define NS_PSET "http://lv2plug.in/ns/dev/presets#"
365 static inline SLV2Value
366 get_value(SLV2Plugin p, SLV2Value subject, SLV2Value predicate)
368 SLV2Values vs = slv2_plugin_get_value_for_subject(p, subject, predicate);
369 return vs ? slv2_values_get_at(vs, 0) : NULL;
373 LV2Plugin::find_presets ()
375 SLV2Value dc_title = slv2_value_new_uri(_world.world, NS_DC "title");
376 SLV2Value pset_hasPreset = slv2_value_new_uri(_world.world, NS_PSET "hasPreset");
378 SLV2Values presets = slv2_plugin_get_value(_plugin, pset_hasPreset);
379 for (unsigned i = 0; i < slv2_values_size(presets); ++i) {
380 // TODO: Choose which name to use based on locale?
381 SLV2Value preset = slv2_values_get_at(presets, i);
382 SLV2Value name = get_value(_plugin, preset, dc_title);
384 _presets.insert(std::make_pair(slv2_value_as_string(preset),
386 slv2_value_as_string(preset),
387 slv2_value_as_string(name))));
389 warning << string_compose(
390 _("Plugin \"%1\% preset \"%2%\" is missing a dc:title\n"),
391 unique_id(), slv2_value_as_string(preset));
394 slv2_values_free(presets);
396 slv2_value_free(pset_hasPreset);
397 slv2_value_free(dc_title);
401 LV2Plugin::load_preset (PresetRecord r)
403 Plugin::load_preset (r);
406 // TODO: SLV2 needs blank nodes in the API for this to be possible...
407 SLV2Value lv2_port = slv2_value_new_uri(_world.world, NS_LV2 "port");
408 SLV2Value lv2_symbol = slv2_value_new_uri(_world.world, NS_LV2 "symbol");
409 SLV2Value pset_value = slv2_value_new_uri(_world.world, NS_PSET "value");
410 SLV2Value preset = slv2_value_new_uri(_world.world, r.uri.c_str());
412 SLV2Values ports = slv2_plugin_get_value_for_subject(_plugin, preset, lv2_port);
413 for (unsigned i = 0; i < slv2_values_size(ports); ++i) {
414 SLV2Value port = slv2_values_get_at(ports, i); // ... because of this
415 SLV2Value symbol = get_value(_plugin, port, lv2_symbol);
416 SLV2Value value = get_value(_plugin, port, pset_value);
417 if (value && slv2_value_is_float(value)) {
418 set_parameter(_port_indices[slv2_value_as_string(symbol)],
419 slv2_value_as_float(value));
422 slv2_values_free(ports);
424 slv2_value_free(preset);
425 slv2_value_free(pset_value);
426 slv2_value_free(lv2_symbol);
427 slv2_value_free(lv2_port);
430 const string query = string(
431 "PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
432 "PREFIX dc: <http://dublincore.org/documents/dcmi-namespace/>\n"
433 "SELECT ?sym ?val WHERE { <") + r.uri + "> lv2:port ?port . "
434 " ?port lv2:symbol ?sym ; lv2p:value ?val . }";
435 SLV2Results values = slv2_plugin_query_sparql(_plugin, query.c_str());
436 for (; !slv2_results_finished(values); slv2_results_next(values)) {
437 SLV2Value sym = slv2_results_get_binding_value(values, 0);
438 SLV2Value val = slv2_results_get_binding_value(values, 1);
439 if (slv2_value_is_float(val)) {
440 uint32_t index = _port_indices[slv2_value_as_string(sym)];
441 set_parameter(index, slv2_value_as_float(val));
444 slv2_results_free(values);
449 LV2Plugin::do_save_preset (string /*name*/)
455 LV2Plugin::do_remove_preset (string /*name*/)
461 LV2Plugin::has_editor() const
463 return (_ui != NULL);
467 LV2Plugin::set_state(const XMLNode& node, int version)
470 const XMLProperty* prop;
471 XMLNodeConstIterator iter;
476 LocaleGuard lg(X_("POSIX"));
478 if (node.name() != state_node_name()) {
479 error << _("Bad node sent to LV2Plugin::set_state") << endmsg;
484 nodes = node.children ("port");
486 nodes = node.children ("Port");
489 for (iter = nodes.begin(); iter != nodes.end(); ++iter){
493 if ((prop = child->property("symbol")) != 0) {
494 sym = prop->value().c_str();
496 warning << _("LV2: port has no symbol, ignored") << endmsg;
500 map<string,uint32_t>::iterator i = _port_indices.find(sym);
502 if (i != _port_indices.end()) {
505 warning << _("LV2: port has unknown index, ignored") << endmsg;
509 if ((prop = child->property("value")) != 0) {
510 value = prop->value().c_str();
512 warning << _("LV2: port has no value, ignored") << endmsg;
516 set_parameter (port_id, atof(value));
519 if ((prop = node.property("state-file")) != 0) {
520 std::string state_path = Glib::build_filename(_session.plugins_dir(), prop->value());
522 // Get LV2 Persist extension data from plugin instance
523 LV2_Persist* persist = (LV2_Persist*)slv2_instance_get_extension_data(
524 _instance, "http://lv2plug.in/ns/ext/persist");
526 cout << "Loading LV2 state from " << state_path << endl;
527 LV2PFile file = lv2_pfile_open(state_path.c_str(), false);
528 persist->restore(_instance->lv2_handle, &LV2Plugin::lv2_persist_retrieve_callback, file);
529 lv2_pfile_close(file);
531 warning << string_compose(
532 _("Plugin \"%1\% failed to return LV2 persist data"),
537 latency_compute_run ();
539 return Plugin::set_state (node, version);
543 LV2Plugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const
545 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, which);
547 SLV2Value def, min, max;
548 slv2_port_get_range(_plugin, port, &def, &min, &max);
550 desc.integer_step = slv2_port_has_property(_plugin, port, _world.integer);
551 desc.toggled = slv2_port_has_property(_plugin, port, _world.toggled);
552 desc.logarithmic = slv2_port_has_property(_plugin, port, _world.logarithmic);
553 desc.sr_dependent = slv2_port_has_property(_plugin, port, _world.srate);
554 desc.label = slv2_value_as_string(slv2_port_get_name(_plugin, port));
555 desc.lower = min ? slv2_value_as_float(min) : 0.0f;
556 desc.upper = max ? slv2_value_as_float(max) : 1.0f;
557 desc.min_unbound = false; // TODO: LV2 extension required
558 desc.max_unbound = false; // TODO: LV2 extension required
560 if (desc.integer_step) {
562 desc.smallstep = 0.1;
563 desc.largestep = 10.0;
565 const float delta = desc.upper - desc.lower;
566 desc.step = delta / 1000.0f;
567 desc.smallstep = delta / 10000.0f;
568 desc.largestep = delta/10.0f;
571 slv2_value_free(def);
572 slv2_value_free(min);
573 slv2_value_free(max);
580 LV2Plugin::describe_parameter (Evoral::Parameter which)
582 if (which.type() == PluginAutomation && which.id() < parameter_count()) {
583 SLV2Value name = slv2_port_get_name(_plugin,
584 slv2_plugin_get_port_by_index(_plugin, which.id()));
585 string ret(slv2_value_as_string(name));
586 slv2_value_free(name);
594 LV2Plugin::signal_latency () const
596 if (_latency_control_port) {
597 return (framecnt_t) floor (*_latency_control_port);
603 set<Evoral::Parameter>
604 LV2Plugin::automatable () const
606 set<Evoral::Parameter> ret;
608 for (uint32_t i = 0; i < parameter_count(); ++i){
609 if (parameter_is_input(i) && parameter_is_control(i)) {
610 ret.insert (ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
618 LV2Plugin::connect_and_run (BufferSet& bufs,
619 ChanMapping in_map, ChanMapping out_map,
620 pframes_t nframes, framecnt_t offset)
622 Plugin::connect_and_run (bufs, in_map, out_map, nframes, offset);
624 cycles_t then = get_cycles ();
626 uint32_t audio_in_index = 0;
627 uint32_t audio_out_index = 0;
628 uint32_t midi_in_index = 0;
629 uint32_t midi_out_index = 0;
630 for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
631 if (parameter_is_audio(port_index)) {
632 if (parameter_is_input(port_index)) {
633 const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++);
634 //cerr << port_index << " : " << " AUDIO IN " << buf_index << endl;
635 slv2_instance_connect_port(_instance, port_index,
636 bufs.get_audio(buf_index).data(offset));
637 } else if (parameter_is_output(port_index)) {
638 const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++);
639 //cerr << port_index << " : " << " AUDIO OUT " << buf_index << endl;
640 slv2_instance_connect_port(_instance, port_index,
641 bufs.get_audio(buf_index).data(offset));
643 } else if (parameter_is_midi(port_index)) {
644 if (parameter_is_input(port_index)) {
645 const uint32_t buf_index = in_map.get(DataType::MIDI, midi_in_index++);
646 //cerr << port_index << " : " << " MIDI IN " << buf_index << endl;
647 slv2_instance_connect_port(_instance, port_index,
648 bufs.get_lv2_midi(true, buf_index).data());
649 } else if (parameter_is_output(port_index)) {
650 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
651 //cerr << port_index << " : " << " MIDI OUT " << buf_index << endl;
652 slv2_instance_connect_port(_instance, port_index,
653 bufs.get_lv2_midi(false, buf_index).data());
655 } else if (!parameter_is_control(port_index)) {
656 // Optional port (it'd better be if we've made it this far...)
657 slv2_instance_connect_port(_instance, port_index, NULL);
664 for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
665 if (parameter_is_midi(port_index) && parameter_is_output(port_index)) {
666 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
667 bufs.flush_lv2_midi(true, buf_index);
671 cycles_t now = get_cycles ();
672 set_cycles ((uint32_t) (now - then));
678 LV2Plugin::parameter_is_control (uint32_t param) const
680 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
681 return slv2_port_is_a(_plugin, port, _world.control_class);
685 LV2Plugin::parameter_is_audio (uint32_t param) const
687 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
688 return slv2_port_is_a(_plugin, port, _world.audio_class);
692 LV2Plugin::parameter_is_midi (uint32_t param) const
694 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
695 return slv2_port_is_a(_plugin, port, _world.event_class);
696 // && slv2_port_supports_event(_plugin, port, _world.midi_class);
700 LV2Plugin::parameter_is_output (uint32_t param) const
702 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
703 return slv2_port_is_a(_plugin, port, _world.output_class);
707 LV2Plugin::parameter_is_input (uint32_t param) const
709 SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
710 return slv2_port_is_a(_plugin, port, _world.input_class);
714 LV2Plugin::print_parameter (uint32_t param, char *buf, uint32_t len) const
717 if (param < parameter_count()) {
718 snprintf (buf, len, "%.3f", get_parameter (param));
726 LV2Plugin::run (pframes_t nframes)
728 for (uint32_t i = 0; i < parameter_count(); ++i) {
729 if (parameter_is_control(i) && parameter_is_input(i)) {
730 _control_data[i] = _shadow_data[i];
734 slv2_instance_run(_instance, nframes);
738 LV2Plugin::latency_compute_run ()
740 if (!_latency_control_port) {
744 /* we need to run the plugin so that it can set its latency
750 uint32_t port_index = 0;
751 uint32_t in_index = 0;
752 uint32_t out_index = 0;
754 const framecnt_t bufsize = 1024;
755 float buffer[bufsize];
757 memset(buffer, 0, sizeof(float) * bufsize);
759 // FIXME: Ensure plugins can handle in-place processing
763 while (port_index < parameter_count()) {
764 if (parameter_is_audio (port_index)) {
765 if (parameter_is_input (port_index)) {
766 slv2_instance_connect_port (_instance, port_index, buffer);
768 } else if (parameter_is_output (port_index)) {
769 slv2_instance_connect_port (_instance, port_index, buffer);
781 : world(slv2_world_new())
783 slv2_world_load_all(world);
784 input_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_INPUT);
785 output_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_OUTPUT);
786 control_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_CONTROL);
787 audio_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_AUDIO);
788 event_class = slv2_value_new_uri(world, SLV2_PORT_CLASS_EVENT);
789 midi_class = slv2_value_new_uri(world, SLV2_EVENT_CLASS_MIDI);
790 in_place_broken = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "inPlaceBroken");
791 integer = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "integer");
792 toggled = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "toggled");
793 srate = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "sampleRate");
794 gtk_gui = slv2_value_new_uri(world, "http://lv2plug.in/ns/extensions/ui#GtkUI");
795 external_gui = slv2_value_new_uri(world, "http://lv2plug.in/ns/extensions/ui#external");
796 logarithmic = slv2_value_new_uri(world, "http://lv2plug.in/ns/dev/extportinfo#logarithmic");
799 LV2World::~LV2World()
801 slv2_value_free(input_class);
802 slv2_value_free(output_class);
803 slv2_value_free(control_class);
804 slv2_value_free(audio_class);
805 slv2_value_free(event_class);
806 slv2_value_free(midi_class);
807 slv2_value_free(in_place_broken);
810 LV2PluginInfo::LV2PluginInfo (void* lv2_world, void* slv2_plugin)
811 : _lv2_world(lv2_world)
812 , _slv2_plugin(slv2_plugin)
817 LV2PluginInfo::~LV2PluginInfo()
822 LV2PluginInfo::load (Session& session)
827 plugin.reset (new LV2Plugin (session.engine(), session,
828 *(LV2World*)_lv2_world, (SLV2Plugin)_slv2_plugin, session.frame_rate()));
830 plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this)));
834 catch (failed_constructor &err) {
835 return PluginPtr ((Plugin*) 0);
842 LV2PluginInfo::discover (void* lv2_world)
844 PluginInfoList* plugs = new PluginInfoList;
845 LV2World* world = (LV2World*)lv2_world;
846 SLV2Plugins plugins = slv2_world_get_all_plugins(world->world);
848 cerr << "LV2: Discovering " << slv2_plugins_size (plugins) << " plugins" << endl;
850 for (unsigned i=0; i < slv2_plugins_size(plugins); ++i) {
851 SLV2Plugin p = slv2_plugins_get_at(plugins, i);
852 LV2PluginInfoPtr info (new LV2PluginInfo(lv2_world, p));
854 SLV2Value name = slv2_plugin_get_name(p);
857 cerr << "LV2: invalid plugin\n";
863 info->name = string(slv2_value_as_string(name));
864 slv2_value_free(name);
866 SLV2PluginClass pclass = slv2_plugin_get_class(p);
867 SLV2Value label = slv2_plugin_class_get_label(pclass);
868 info->category = slv2_value_as_string(label);
870 SLV2Value author_name = slv2_plugin_get_author_name(p);
871 info->creator = author_name ? string(slv2_value_as_string(author_name)) : "Unknown";
872 slv2_value_free(author_name);
874 info->path = "/NOPATH"; // Meaningless for LV2
876 info->n_inputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
877 world->input_class, world->audio_class, NULL));
878 info->n_inputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
879 world->input_class, world->event_class, NULL));
881 info->n_outputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
882 world->output_class, world->audio_class, NULL));
883 info->n_outputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
884 world->output_class, world->event_class, NULL));
886 info->unique_id = slv2_value_as_uri(slv2_plugin_get_uri(p));
887 info->index = 0; // Meaningless for LV2
889 plugs->push_back (info);
892 cerr << "Done LV2 discovery" << endl;