libs/ardour/lv2_plugin.cc

   1 /*
   2     Copyright (C) 2008-2011 Paul Davis
   3     Author: David Robillard
   4
   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.
   9
  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.
  14
  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.
  18
  19 */
  20
  21 #include <string>
  22 #include <vector>
  23
  24 #include <cmath>
  25 #include <cstdlib>
  26 #include <cstring>
  27
  28 #include <glibmm.h>
  29
  30 #include "pbd/compose.h"
  31 #include "pbd/error.h"
  32 #include "pbd/pathscanner.h"
  33 #include "pbd/xml++.h"
  34
  35 #include "ardour/ardour.h"
  36 #include "ardour/audio_buffer.h"
  37 #include "ardour/audioengine.h"
  38 #include "ardour/debug.h"
  39 #include "ardour/lv2_event_buffer.h"
  40 #include "ardour/lv2_plugin.h"
  41 #include "ardour/session.h"
  42
  43 #include "pbd/stl_delete.h"
  44
  45 #include "i18n.h"
  46 #include <locale.h>
  47
  48 #include "lv2ext/lv2_persist.h"
  49 #include "lv2_pfile.h"
  50
  51 #define NS_DC   "http://dublincore.org/documents/dcmi-namespace/"
  52 #define NS_LV2  "http://lv2plug.in/ns/lv2core#"
  53 #define NS_PSET "http://lv2plug.in/ns/dev/presets#"
  54 #define NS_UI   "http://lv2plug.in/ns/extensions/ui#"
  55
  56 using namespace std;
  57 using namespace ARDOUR;
  58 using namespace PBD;
  59
  60 URIMap   LV2Plugin::_uri_map;
  61 uint32_t LV2Plugin::_midi_event_type = _uri_map.uri_to_id (
  62                 "http://lv2plug.in/ns/ext/event",
  63                 "http://lv2plug.in/ns/ext/midi#MidiEvent");
  64
  65 LV2Plugin::LV2Plugin (AudioEngine& engine,
  66                       Session&     session,
  67                       LV2World&    world,
  68                       SLV2Plugin   plugin,
  69                       framecnt_t   rate)
  70         : Plugin (engine, session)
  71         , _world (world)
  72         , _features (NULL)
  73 {
  74         init (world, plugin, rate);
  75 }
  76
  77 LV2Plugin::LV2Plugin (const LV2Plugin &other)
  78         : Plugin (other)
  79         , _world(other._world)
  80         , _features(NULL)
  81 {
  82         init (other._world, other._plugin, other._sample_rate);
  83
  84         for (uint32_t i = 0; i < parameter_count(); ++i) {
  85                 _control_data[i] = other._shadow_data[i];
  86                 _shadow_data[i] = other._shadow_data[i];
  87         }
  88 }
  89
  90 void
  91 LV2Plugin::init (LV2World& world, SLV2Plugin plugin, framecnt_t rate)
  92 {
  93         DEBUG_TRACE (DEBUG::LV2, "LV2 plugin init\n");
  94
  95         _world                = world;
  96         _plugin               = plugin;
  97         _ui                   = NULL;
  98         _control_data         = 0;
  99         _shadow_data          = 0;
 100         _latency_control_port = 0;
 101         _was_activated        = false;
 102
 103         _instance_access_feature.URI = "http://lv2plug.in/ns/ext/instance-access";
 104         _data_access_feature.URI     = "http://lv2plug.in/ns/ext/data-access";
 105         _persist_feature.URI         = "http://lv2plug.in/ns/ext/persist";
 106         _persist_feature.data        = NULL;
 107
 108         SLV2Value persist_uri = slv2_value_new_uri(_world.world, _persist_feature.URI);
 109         _supports_persist = slv2_plugin_has_feature(plugin, persist_uri);
 110         slv2_value_free(persist_uri);
 111
 112         _features    = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * 5);
 113         _features[0] = &_instance_access_feature;
 114         _features[1] = &_data_access_feature;
 115         _features[2] = &_persist_feature;
 116         _features[3] = _uri_map.feature();
 117         _features[4] = NULL;
 118
 119         _instance = slv2_plugin_instantiate(plugin, rate, _features);
 120         _name     = slv2_plugin_get_name(plugin);
 121         _author   = slv2_plugin_get_author_name(plugin);
 122
 123         if (_instance == 0) {
 124                 error << _("LV2: Failed to instantiate plugin ")
 125                       << slv2_value_as_string (slv2_plugin_get_uri(plugin)) << endmsg;
 126                 throw failed_constructor();
 127         }
 128
 129         _instance_access_feature.data              = (void*)_instance->lv2_handle;
 130         _data_access_extension_data.extension_data = _instance->lv2_descriptor->extension_data;
 131         _data_access_feature.data                  = &_data_access_extension_data;
 132
 133         if (slv2_plugin_has_feature(plugin, world.in_place_broken)) {
 134                 error << string_compose(
 135                                 _("LV2: \"%1\" cannot be used, since it cannot do inplace processing"),
 136                                 slv2_value_as_string(_name)) << endmsg;
 137                 slv2_value_free(_name);
 138                 slv2_value_free(_author);
 139                 throw failed_constructor();
 140         }
 141
 142         _sample_rate = rate;
 143
 144         const uint32_t num_ports    = slv2_plugin_get_num_ports(plugin);
 145         const bool     latent       = slv2_plugin_has_latency(plugin);
 146         const uint32_t latency_port = (latent)
 147                 ? slv2_plugin_get_latency_port_index(plugin)
 148                 : 0;
 149
 150         _control_data = new float[num_ports];
 151         _shadow_data  = new float[num_ports];
 152         _defaults     = new float[num_ports];
 153
 154         for (uint32_t i = 0; i < num_ports; ++i) {
 155                 SLV2Port  port = slv2_plugin_get_port_by_index(plugin, i);
 156                 SLV2Value sym  = slv2_port_get_symbol(_plugin, port);
 157                 _port_indices.insert(std::make_pair(slv2_value_as_string(sym), i));
 158                 if (parameter_is_control(i)) {
 159                         SLV2Value def;
 160                         slv2_port_get_range(plugin, port, &def, NULL, NULL);
 161                         _defaults[i] = def ? slv2_value_as_float(def) : 0.0f;
 162                         slv2_value_free(def);
 163
 164                         slv2_instance_connect_port (_instance, i, &_control_data[i]);
 165
 166                         if (latent && i == latency_port) {
 167                                 _latency_control_port = &_control_data[i];
 168                                 *_latency_control_port = 0;
 169                         }
 170
 171                         if (parameter_is_input(i)) {
 172                                 _shadow_data[i] = default_value (i);
 173                         }
 174                 } else {
 175                         _defaults[i] = 0.0f;
 176                 }
 177         }
 178
 179         SLV2UIs uis = slv2_plugin_get_uis(_plugin);
 180         if (slv2_uis_size(uis) > 0) {
 181                 for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
 182                         SLV2UI ui = slv2_uis_get_at(uis, i);
 183                         if (slv2_ui_is_a(ui, _world.gtk_gui)) {
 184                                 _ui = ui;
 185                                 break;
 186                         }
 187                 }
 188
 189                 // if gtk gui is not available, try to find external gui
 190                 if (!_ui) {
 191                         for (unsigned i=0; i < slv2_uis_size(uis); ++i) {
 192                                 SLV2UI ui = slv2_uis_get_at(uis, i);
 193                                 if (slv2_ui_is_a(ui, _world.external_gui)) {
 194                                         _ui = ui;
 195                                         break;
 196                                 }
 197                         }
 198                 }
 199         }
 200
 201         latency_compute_run ();
 202 }
 203
 204 LV2Plugin::~LV2Plugin ()
 205 {
 206         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 destroy\n", name()));
 207
 208         deactivate ();
 209         cleanup ();
 210
 211         slv2_instance_free(_instance);
 212         slv2_value_free(_name);
 213         slv2_value_free(_author);
 214
 215         delete [] _control_data;
 216         delete [] _shadow_data;
 217 }
 218
 219 bool
 220 LV2Plugin::is_external_ui() const
 221 {
 222         return slv2_ui_is_a(_ui, _world.external_gui);
 223 }
 224
 225 string
 226 LV2Plugin::unique_id() const
 227 {
 228         return slv2_value_as_uri(slv2_plugin_get_uri(_plugin));
 229 }
 230
 231
 232 float
 233 LV2Plugin::default_value (uint32_t port)
 234 {
 235         return _defaults[port];
 236 }
 237
 238 const char*
 239 LV2Plugin::port_symbol (uint32_t index) const
 240 {
 241         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, index);
 242         if (!port) {
 243                 error << name() << ": Invalid port index " << index << endmsg;
 244         }
 245
 246         SLV2Value sym = slv2_port_get_symbol(_plugin, port);
 247         return slv2_value_as_string(sym);
 248 }
 249
 250
 251 void
 252 LV2Plugin::set_parameter (uint32_t which, float val)
 253 {
 254         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 set parameter %2 to %3\n", name(), which, val));
 255
 256         if (which < slv2_plugin_get_num_ports(_plugin)) {
 257                 _shadow_data[which] = val;
 258         } else {
 259                 warning << string_compose (
 260                         _("Illegal parameter number used with plugin \"%1\". "
 261                           "This is a bug in either %2 or the LV2 plugin (%3)"),
 262                         name(), PROGRAM_NAME, unique_id()) << endmsg;
 263         }
 264
 265         Plugin::set_parameter (which, val);
 266 }
 267
 268 float
 269 LV2Plugin::get_parameter (uint32_t which) const
 270 {
 271         if (parameter_is_input(which)) {
 272                 return (float) _shadow_data[which];
 273         } else {
 274                 return (float) _control_data[which];
 275         }
 276         return 0.0f;
 277 }
 278
 279 uint32_t
 280 LV2Plugin::nth_parameter (uint32_t n, bool& ok) const
 281 {
 282         ok = false;
 283         for (uint32_t c = 0, x = 0; x < slv2_plugin_get_num_ports (_plugin); ++x) {
 284                 if (parameter_is_control (x)) {
 285                         if (c++ == n) {
 286                                 ok = true;
 287                                 return x;
 288                         }
 289                 }
 290         }
 291
 292         return 0;
 293 }
 294
 295 void
 296 LV2Plugin::lv2_persist_store_callback(void*       callback_data,
 297                                       const char* key,
 298                                       const void* value,
 299                                       size_t      size,
 300                                       uint32_t    type)
 301 {
 302         LV2PFile file = (LV2PFile)callback_data;
 303
 304         // FIXME: assumes URIs are mapped in the default context (or not event, at least)
 305         const char* type_uri = LV2Plugin::_uri_map.id_to_uri(NULL, type);
 306         cout << "LV2 PERSIST STORE " << key << " = " << value << " :: " << type_uri << endl;
 307         lv2_pfile_write(file, key, value, size, type_uri);
 308 }
 309
 310 const void*
 311 LV2Plugin::lv2_persist_retrieve_callback(void*       callback_data,
 312                                          const char* key,
 313                                          size_t*     size,
 314                                          uint32_t*   type)
 315 {
 316         //LV2PFile file = (LV2PFile)callback_data;
 317         cout << "LV2 PERSIST RETRIEVE " << key << endl;
 318         return NULL;
 319 }
 320
 321 void
 322 LV2Plugin::add_state (XMLNode* root) const
 323 {
 324         XMLNode *child;
 325         char buf[16];
 326         LocaleGuard lg (X_("POSIX"));
 327
 328         for (uint32_t i = 0; i < parameter_count(); ++i){
 329                 if (parameter_is_input(i) && parameter_is_control(i)) {
 330                         child = new XMLNode("Port");
 331                         child->add_property("symbol", port_symbol(i));
 332                         snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
 333                         child->add_property("value", string(buf));
 334                         root->add_child_nocopy (*child);
 335                 }
 336         }
 337
 338         if (_supports_persist) {
 339                 // Create state directory for this plugin instance
 340                 const std::string state_filename = _id.to_s() + ".lv2pfile";
 341                 const std::string state_path     = Glib::build_filename(
 342                         _session.plugins_dir(), state_filename);
 343
 344                 cout << "Saving LV2 plugin state to " << state_path << endl;
 345
 346                 // Get LV2 Persist extension data from plugin instance
 347                 LV2_Persist* persist = (LV2_Persist*)slv2_instance_get_extension_data(
 348                         _instance, "http://lv2plug.in/ns/ext/persist");
 349                 if (!persist) {
 350                         warning << string_compose(
 351                                 _("Plugin \"%1\% failed to return LV2 persist data"),
 352                                 unique_id());
 353                         return;
 354                 }
 355
 356                 LV2PFile file = lv2_pfile_open(state_path.c_str(), true);
 357                 persist->save(_instance->lv2_handle, &LV2Plugin::lv2_persist_store_callback, file);
 358                 lv2_pfile_close(file);
 359
 360                 root->add_property("state-file", state_filename);
 361         }
 362 }
 363
 364 static inline SLV2Value
 365 get_value(SLV2Plugin p, SLV2Value subject, SLV2Value predicate)
 366 {
 367         SLV2Values vs = slv2_plugin_get_value_for_subject(p, subject, predicate);
 368         return vs ? slv2_values_get_at(vs, 0) : NULL;
 369 }
 370
 371 void
 372 LV2Plugin::find_presets ()
 373 {
 374         SLV2Value dc_title       = slv2_value_new_uri(_world.world, NS_DC   "title");
 375         SLV2Value pset_hasPreset = slv2_value_new_uri(_world.world, NS_PSET "hasPreset");
 376
 377         SLV2Values presets = slv2_plugin_get_value(_plugin, pset_hasPreset);
 378         for (unsigned i = 0; i < slv2_values_size(presets); ++i) {
 379                 SLV2Value preset = slv2_values_get_at(presets, i);
 380                 SLV2Value name   = get_value(_plugin, preset, dc_title);
 381                 if (name) {
 382                         _presets.insert(std::make_pair(slv2_value_as_string(preset),
 383                                                        PresetRecord(
 384                                                                slv2_value_as_string(preset),
 385                                                                slv2_value_as_string(name))));
 386                 } else {
 387                         warning << string_compose(
 388                                 _("Plugin \"%1\% preset \"%2%\" is missing a dc:title\n"),
 389                                 unique_id(), slv2_value_as_string(preset));
 390                 }
 391         }
 392         slv2_values_free(presets);
 393
 394         slv2_value_free(pset_hasPreset);
 395         slv2_value_free(dc_title);
 396 }
 397
 398 bool
 399 LV2Plugin::load_preset (PresetRecord r)
 400 {
 401         Plugin::load_preset (r);
 402
 403 #ifdef HAVE_NEW_SLV2
 404         // New (>= 0.7.0) slv2 no longer supports SPARQL, but exposes blank nodes
 405         // so querying ports is possible with the simple API
 406         SLV2Value lv2_port   = slv2_value_new_uri(_world.world, NS_LV2 "port");
 407         SLV2Value lv2_symbol = slv2_value_new_uri(_world.world, NS_LV2 "symbol");
 408         SLV2Value pset_value = slv2_value_new_uri(_world.world, NS_PSET "value");
 409         SLV2Value preset     = slv2_value_new_uri(_world.world, r.uri.c_str());
 410
 411         SLV2Values ports = slv2_plugin_get_value_for_subject(_plugin, preset, lv2_port);
 412         for (unsigned i = 0; i < slv2_values_size(ports); ++i) {
 413                 SLV2Value port   = slv2_values_get_at(ports, i);
 414                 SLV2Value symbol = get_value(_plugin, port, lv2_symbol);
 415                 SLV2Value value  = get_value(_plugin, port, pset_value);
 416                 if (value && slv2_value_is_float(value)) {
 417                         set_parameter(_port_indices[slv2_value_as_string(symbol)],
 418                                       slv2_value_as_float(value));
 419                 }
 420         }
 421         slv2_values_free(ports);
 422
 423         slv2_value_free(preset);
 424         slv2_value_free(pset_value);
 425         slv2_value_free(lv2_symbol);
 426         slv2_value_free(lv2_port);
 427 #else
 428         const string query = string(
 429                         "PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
 430                         "PREFIX dc:  <http://dublincore.org/documents/dcmi-namespace/>\n"
 431                         "SELECT ?sym ?val WHERE { <") + r.uri + "> lv2:port ?port . "
 432                                 " ?port lv2:symbol ?sym ; lv2p:value ?val . }";
 433         SLV2Results values = slv2_plugin_query_sparql(_plugin, query.c_str());
 434         for (; !slv2_results_finished(values); slv2_results_next(values)) {
 435                 SLV2Value sym = slv2_results_get_binding_value(values, 0);
 436                 SLV2Value val = slv2_results_get_binding_value(values, 1);
 437                 if (slv2_value_is_float(val)) {
 438                         uint32_t index = _port_indices[slv2_value_as_string(sym)];
 439                         set_parameter(index, slv2_value_as_float(val));
 440                 }
 441         }
 442         slv2_results_free(values);
 443 #endif
 444         return true;
 445 }
 446
 447 std::string
 448 LV2Plugin::do_save_preset (string /*name*/)
 449 {
 450         return "";
 451 }
 452
 453 void
 454 LV2Plugin::do_remove_preset (string /*name*/)
 455 {
 456         return;
 457 }
 458
 459 bool
 460 LV2Plugin::has_editor() const
 461 {
 462         return (_ui != NULL);
 463 }
 464
 465 int
 466 LV2Plugin::set_state(const XMLNode& node, int version)
 467 {
 468         XMLNodeList          nodes;
 469         const XMLProperty*   prop;
 470         XMLNodeConstIterator iter;
 471         XMLNode*             child;
 472         const char*          sym;
 473         const char*          value;
 474         uint32_t             port_id;
 475         LocaleGuard          lg(X_("POSIX"));
 476
 477         if (node.name() != state_node_name()) {
 478                 error << _("Bad node sent to LV2Plugin::set_state") << endmsg;
 479                 return -1;
 480         }
 481
 482         if (version < 3000){
 483                 nodes = node.children ("port");
 484         } else {
 485                 nodes = node.children ("Port");
 486         }
 487
 488         for (iter = nodes.begin(); iter != nodes.end(); ++iter){
 489
 490                 child = *iter;
 491
 492                 if ((prop = child->property("symbol")) != 0) {
 493                         sym = prop->value().c_str();
 494                 } else {
 495                         warning << _("LV2: port has no symbol, ignored") << endmsg;
 496                         continue;
 497                 }
 498
 499                 map<string,uint32_t>::iterator i = _port_indices.find(sym);
 500
 501                 if (i != _port_indices.end()) {
 502                         port_id = i->second;
 503                 } else {
 504                         warning << _("LV2: port has unknown index, ignored") << endmsg;
 505                         continue;
 506                 }
 507
 508                 if ((prop = child->property("value")) != 0) {
 509                         value = prop->value().c_str();
 510                 } else {
 511                         warning << _("LV2: port has no value, ignored") << endmsg;
 512                         continue;
 513                 }
 514
 515                 set_parameter (port_id, atof(value));
 516         }
 517
 518         if ((prop = node.property("state-file")) != 0) {
 519                 std::string state_path = Glib::build_filename(_session.plugins_dir(),
 520                                                               prop->value());
 521
 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");
 525                 if (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,
 529                                          &LV2Plugin::lv2_persist_retrieve_callback,
 530                                          file);
 531                         lv2_pfile_close(file);
 532                 } else {
 533                         warning << string_compose(
 534                                 _("Plugin \"%1\% failed to return LV2 persist data"),
 535                                 unique_id());
 536                 }
 537         }
 538
 539         latency_compute_run ();
 540
 541         return Plugin::set_state (node, version);
 542 }
 543
 544 int
 545 LV2Plugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const
 546 {
 547         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, which);
 548
 549         SLV2Value def, min, max;
 550         slv2_port_get_range(_plugin, port, &def, &min, &max);
 551
 552         desc.integer_step = slv2_port_has_property(_plugin, port, _world.integer);
 553         desc.toggled      = slv2_port_has_property(_plugin, port, _world.toggled);
 554         desc.logarithmic  = slv2_port_has_property(_plugin, port, _world.logarithmic);
 555         desc.sr_dependent = slv2_port_has_property(_plugin, port, _world.srate);
 556         desc.label        = slv2_value_as_string(slv2_port_get_name(_plugin, port));
 557         desc.lower        = min ? slv2_value_as_float(min) : 0.0f;
 558         desc.upper        = max ? slv2_value_as_float(max) : 1.0f;
 559         desc.min_unbound  = false; // TODO: LV2 extension required
 560         desc.max_unbound  = false; // TODO: LV2 extension required
 561
 562         if (desc.integer_step) {
 563                 desc.step      = 1.0;
 564                 desc.smallstep = 0.1;
 565                 desc.largestep = 10.0;
 566         } else {
 567                 const float delta = desc.upper - desc.lower;
 568                 desc.step      = delta / 1000.0f;
 569                 desc.smallstep = delta / 10000.0f;
 570                 desc.largestep = delta/10.0f;
 571         }
 572
 573         slv2_value_free(def);
 574         slv2_value_free(min);
 575         slv2_value_free(max);
 576
 577         return 0;
 578 }
 579
 580
 581 string
 582 LV2Plugin::describe_parameter (Evoral::Parameter which)
 583 {
 584         if (which.type() == PluginAutomation && which.id() < parameter_count()) {
 585                 SLV2Value name = slv2_port_get_name(_plugin,
 586                                                     slv2_plugin_get_port_by_index(_plugin, which.id()));
 587                 string ret(slv2_value_as_string(name));
 588                 slv2_value_free(name);
 589                 return ret;
 590         } else {
 591                 return "??";
 592         }
 593 }
 594
 595 framecnt_t
 596 LV2Plugin::signal_latency () const
 597 {
 598         if (_latency_control_port) {
 599                 return (framecnt_t) floor (*_latency_control_port);
 600         } else {
 601                 return 0;
 602         }
 603 }
 604
 605 set<Evoral::Parameter>
 606 LV2Plugin::automatable () const
 607 {
 608         set<Evoral::Parameter> ret;
 609
 610         for (uint32_t i = 0; i < parameter_count(); ++i){
 611                 if (parameter_is_input(i) && parameter_is_control(i)) {
 612                         ret.insert (ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
 613                 }
 614         }
 615
 616         return ret;
 617 }
 618
 619 void
 620 LV2Plugin::activate ()
 621 {
 622         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 activate\n", name()));
 623
 624         if (!_was_activated) {
 625                 slv2_instance_activate (_instance);
 626                 _was_activated = true;
 627         }
 628 }
 629
 630 void
 631 LV2Plugin::deactivate ()
 632 {
 633         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 deactivate\n", name()));
 634
 635         if (_was_activated) {
 636                 slv2_instance_deactivate (_instance);
 637                 _was_activated = false;
 638         }
 639 }
 640
 641 void
 642 LV2Plugin::cleanup ()
 643 {
 644         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 cleanup\n", name()));
 645
 646         activate ();
 647         deactivate ();
 648         slv2_instance_free (_instance);
 649         _instance = NULL;
 650 }
 651
 652 int
 653 LV2Plugin::connect_and_run (BufferSet& bufs,
 654                             ChanMapping in_map, ChanMapping out_map,
 655                             pframes_t nframes, framecnt_t offset)
 656 {
 657         DEBUG_TRACE (DEBUG::LV2, string_compose ("%1 run %2 offset %3\n", name(), nframes, offset));
 658
 659         Plugin::connect_and_run (bufs, in_map, out_map, nframes, offset);
 660
 661         cycles_t then = get_cycles ();
 662
 663         uint32_t audio_in_index  = 0;
 664         uint32_t audio_out_index = 0;
 665         uint32_t midi_in_index   = 0;
 666         uint32_t midi_out_index  = 0;
 667         for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
 668                 if (parameter_is_audio(port_index)) {
 669                         if (parameter_is_input(port_index)) {
 670                                 const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++);
 671                                 //cerr << port_index << " : " << " AUDIO IN " << buf_index << endl;
 672                                 slv2_instance_connect_port(_instance, port_index,
 673                                                 bufs.get_audio(buf_index).data(offset));
 674                         } else if (parameter_is_output(port_index)) {
 675                                 const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++);
 676                                 //cerr << port_index << " : " << " AUDIO OUT " << buf_index << endl;
 677                                 slv2_instance_connect_port(_instance, port_index,
 678                                                 bufs.get_audio(buf_index).data(offset));
 679                         }
 680                 } else if (parameter_is_midi(port_index)) {
 681                         if (parameter_is_input(port_index)) {
 682                                 const uint32_t buf_index = in_map.get(DataType::MIDI, midi_in_index++);
 683                                 //cerr << port_index << " : " << " MIDI IN " << buf_index << endl;
 684                                 slv2_instance_connect_port(_instance, port_index,
 685                                                 bufs.get_lv2_midi(true, buf_index).data());
 686                         } else if (parameter_is_output(port_index)) {
 687                                 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
 688                                 //cerr << port_index << " : " << " MIDI OUT " << buf_index << endl;
 689                                 slv2_instance_connect_port(_instance, port_index,
 690                                                 bufs.get_lv2_midi(false, buf_index).data());
 691                         }
 692                 } else if (!parameter_is_control(port_index)) {
 693                         // Optional port (it'd better be if we've made it this far...)
 694                         slv2_instance_connect_port(_instance, port_index, NULL);
 695                 }
 696         }
 697
 698         run (nframes);
 699
 700         midi_out_index = 0;
 701         for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
 702                 if (parameter_is_midi(port_index) && parameter_is_output(port_index)) {
 703                         const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
 704                         bufs.flush_lv2_midi(true, buf_index);
 705                 }
 706         }
 707
 708         cycles_t now = get_cycles ();
 709         set_cycles ((uint32_t) (now - then));
 710
 711         return 0;
 712 }
 713
 714 bool
 715 LV2Plugin::parameter_is_control (uint32_t param) const
 716 {
 717         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
 718         return slv2_port_is_a(_plugin, port, _world.control_class);
 719 }
 720
 721 bool
 722 LV2Plugin::parameter_is_audio (uint32_t param) const
 723 {
 724         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
 725         return slv2_port_is_a(_plugin, port, _world.audio_class);
 726 }
 727
 728 bool
 729 LV2Plugin::parameter_is_midi (uint32_t param) const
 730 {
 731         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
 732         return slv2_port_is_a(_plugin, port, _world.event_class);
 733         //      && slv2_port_supports_event(_plugin, port, _world.midi_class);
 734 }
 735
 736 bool
 737 LV2Plugin::parameter_is_output (uint32_t param) const
 738 {
 739         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
 740         return slv2_port_is_a(_plugin, port, _world.output_class);
 741 }
 742
 743 bool
 744 LV2Plugin::parameter_is_input (uint32_t param) const
 745 {
 746         SLV2Port port = slv2_plugin_get_port_by_index(_plugin, param);
 747         return slv2_port_is_a(_plugin, port, _world.input_class);
 748 }
 749
 750 void
 751 LV2Plugin::print_parameter (uint32_t param, char* buf, uint32_t len) const
 752 {
 753         if (buf && len) {
 754                 if (param < parameter_count()) {
 755                         snprintf (buf, len, "%.3f", get_parameter (param));
 756                 } else {
 757                         strcat (buf, "0");
 758                 }
 759         }
 760 }
 761
 762 void
 763 LV2Plugin::run (pframes_t nframes)
 764 {
 765         for (uint32_t i = 0; i < parameter_count(); ++i) {
 766                 if (parameter_is_control(i) && parameter_is_input(i))  {
 767                         _control_data[i] = _shadow_data[i];
 768                 }
 769         }
 770
 771         slv2_instance_run(_instance, nframes);
 772 }
 773
 774 void
 775 LV2Plugin::latency_compute_run ()
 776 {
 777         if (!_latency_control_port) {
 778                 return;
 779         }
 780
 781         /* we need to run the plugin so that it can set its latency
 782            parameter.
 783         */
 784
 785         activate ();
 786
 787         uint32_t port_index = 0;
 788         uint32_t in_index   = 0;
 789         uint32_t out_index  = 0;
 790
 791         const framecnt_t bufsize = 1024;
 792         float buffer[bufsize];
 793
 794         memset(buffer, 0, sizeof(float) * bufsize);
 795
 796         // FIXME: Ensure plugins can handle in-place processing
 797
 798         port_index = 0;
 799
 800         while (port_index < parameter_count()) {
 801                 if (parameter_is_audio (port_index)) {
 802                         if (parameter_is_input (port_index)) {
 803                                 slv2_instance_connect_port (_instance, port_index, buffer);
 804                                 in_index++;
 805                         } else if (parameter_is_output (port_index)) {
 806                                 slv2_instance_connect_port (_instance, port_index, buffer);
 807                                 out_index++;
 808                         }
 809                 }
 810                 port_index++;
 811         }
 812
 813         run (bufsize);
 814         deactivate ();
 815 }
 816
 817 LV2World::LV2World()
 818         : world(slv2_world_new())
 819 {
 820         slv2_world_load_all(world);
 821         input_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_INPUT);
 822         output_class    = slv2_value_new_uri(world, SLV2_PORT_CLASS_OUTPUT);
 823         control_class   = slv2_value_new_uri(world, SLV2_PORT_CLASS_CONTROL);
 824         audio_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_AUDIO);
 825         event_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_EVENT);
 826         midi_class      = slv2_value_new_uri(world, SLV2_EVENT_CLASS_MIDI);
 827         in_place_broken = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "inPlaceBroken");
 828         integer         = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "integer");
 829         toggled         = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "toggled");
 830         srate           = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "sampleRate");
 831         gtk_gui         = slv2_value_new_uri(world, NS_UI "GtkUI");
 832         external_gui    = slv2_value_new_uri(world, NS_UI "external");
 833         logarithmic     = slv2_value_new_uri(world, "http://lv2plug.in/ns/dev/extportinfo#logarithmic");
 834 }
 835
 836 LV2World::~LV2World()
 837 {
 838         slv2_value_free(input_class);
 839         slv2_value_free(output_class);
 840         slv2_value_free(control_class);
 841         slv2_value_free(audio_class);
 842         slv2_value_free(event_class);
 843         slv2_value_free(midi_class);
 844         slv2_value_free(in_place_broken);
 845 }
 846
 847 LV2PluginInfo::LV2PluginInfo (void* lv2_world, void* slv2_plugin)
 848         : _lv2_world(lv2_world)
 849         , _slv2_plugin(slv2_plugin)
 850 {
 851         type = ARDOUR::LV2;
 852 }
 853
 854 LV2PluginInfo::~LV2PluginInfo()
 855 {
 856 }
 857
 858 PluginPtr
 859 LV2PluginInfo::load (Session& session)
 860 {
 861         try {
 862                 PluginPtr plugin;
 863
 864                 plugin.reset (new LV2Plugin (session.engine(), session,
 865                                 *(LV2World*)_lv2_world, (SLV2Plugin)_slv2_plugin, session.frame_rate()));
 866
 867                 plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this)));
 868                 return plugin;
 869         }
 870
 871         catch (failed_constructor &err) {
 872                 return PluginPtr ((Plugin*) 0);
 873         }
 874
 875         return PluginPtr();
 876 }
 877
 878 PluginInfoList*
 879 LV2PluginInfo::discover (void* lv2_world)
 880 {
 881         PluginInfoList* plugs   = new PluginInfoList;
 882         LV2World*       world   = (LV2World*)lv2_world;
 883         SLV2Plugins     plugins = slv2_world_get_all_plugins(world->world);
 884
 885         cerr << "LV2: Discovering " << slv2_plugins_size (plugins) << " plugins" << endl;
 886
 887         for (unsigned i=0; i < slv2_plugins_size(plugins); ++i) {
 888                 SLV2Plugin p = slv2_plugins_get_at(plugins, i);
 889                 LV2PluginInfoPtr info (new LV2PluginInfo(lv2_world, p));
 890
 891                 SLV2Value name = slv2_plugin_get_name(p);
 892
 893                 if (!name) {
 894                         cerr << "LV2: invalid plugin\n";
 895                         continue;
 896                 }
 897
 898                 info->type = LV2;
 899
 900                 info->name = string(slv2_value_as_string(name));
 901                 slv2_value_free(name);
 902
 903                 SLV2PluginClass pclass = slv2_plugin_get_class(p);
 904                 SLV2Value label = slv2_plugin_class_get_label(pclass);
 905                 info->category = slv2_value_as_string(label);
 906
 907                 SLV2Value author_name = slv2_plugin_get_author_name(p);
 908                 info->creator = author_name ? string(slv2_value_as_string(author_name)) : "Unknown";
 909                 slv2_value_free(author_name);
 910
 911                 info->path = "/NOPATH"; // Meaningless for LV2
 912
 913                 info->n_inputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
 914                                 world->input_class, world->audio_class, NULL));
 915                 info->n_inputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
 916                                 world->input_class, world->event_class, NULL));
 917
 918                 info->n_outputs.set_audio(slv2_plugin_get_num_ports_of_class(p,
 919                                 world->output_class, world->audio_class, NULL));
 920                 info->n_outputs.set_midi(slv2_plugin_get_num_ports_of_class(p,
 921                                 world->output_class, world->event_class, NULL));
 922
 923                 info->unique_id = slv2_value_as_uri(slv2_plugin_get_uri(p));
 924                 info->index = 0; // Meaningless for LV2
 925
 926                 plugs->push_back (info);
 927         }
 928
 929         cerr << "Done LV2 discovery" << endl;
 930
 931         return plugs;
 932 }
 933