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 <boost/utility.hpp>
  31
  32 #include "pbd/compose.h"
  33 #include "pbd/error.h"
  34 #include "pbd/pathscanner.h"
  35 #include "pbd/stl_delete.h"
  36 #include "pbd/xml++.h"
  37
  38 #include "libardour-config.h"
  39
  40 #include "ardour/ardour.h"
  41 #include "ardour/audio_buffer.h"
  42 #include "ardour/audioengine.h"
  43 #include "ardour/debug.h"
  44 #include "ardour/lv2_event_buffer.h"
  45 #include "ardour/lv2_plugin.h"
  46 #include "ardour/lv2_state.h"
  47 #include "ardour/session.h"
  48
  49 #include "i18n.h"
  50 #include <locale.h>
  51
  52 #include <slv2/slv2.h>
  53
  54 #include "lv2ext/lv2_files.h"
  55 #include "lv2ext/lv2_persist.h"
  56 #include "rdff.h"
  57 #ifdef HAVE_SUIL
  58 #include <suil/suil.h>
  59 #endif
  60
  61 #define NS_DC   "http://dublincore.org/documents/dcmi-namespace/"
  62 #define NS_LV2  "http://lv2plug.in/ns/lv2core#"
  63 #define NS_PSET "http://lv2plug.in/ns/dev/presets#"
  64 #define NS_UI   "http://lv2plug.in/ns/extensions/ui#"
  65
  66 using namespace std;
  67 using namespace ARDOUR;
  68 using namespace PBD;
  69
  70 URIMap LV2Plugin::_uri_map;
  71 uint32_t LV2Plugin::_midi_event_type = _uri_map.uri_to_id(
  72         "http://lv2plug.in/ns/ext/event",
  73         "http://lv2plug.in/ns/ext/midi#MidiEvent");
  74
  75 class LV2World : boost::noncopyable {
  76 public:
  77         LV2World ();
  78         ~LV2World ();
  79
  80         SLV2World world;
  81         SLV2Value input_class; ///< Input port
  82         SLV2Value output_class; ///< Output port
  83         SLV2Value audio_class; ///< Audio port
  84         SLV2Value control_class; ///< Control port
  85         SLV2Value event_class; ///< Event port
  86         SLV2Value midi_class; ///< MIDI event
  87         SLV2Value in_place_broken;
  88         SLV2Value integer;
  89         SLV2Value toggled;
  90         SLV2Value srate;
  91         SLV2Value gtk_gui;
  92         SLV2Value external_gui;
  93         SLV2Value logarithmic;
  94 };
  95
  96 static LV2World _world;
  97
  98 struct LV2Plugin::Impl {
  99         Impl() : plugin(0), ui(0), ui_type(0), name(0), author(0), instance(0) {}
 100         SLV2Plugin   plugin;
 101         SLV2UI       ui;
 102         SLV2Value    ui_type;
 103         SLV2Value    name;
 104         SLV2Value    author;
 105         SLV2Instance instance;
 106 };
 107
 108 LV2Plugin::LV2Plugin (AudioEngine& engine,
 109                       Session&     session,
 110                       void*        c_plugin,
 111                       framecnt_t   rate)
 112         : Plugin(engine, session)
 113         , _impl(new Impl())
 114         , _features(NULL)
 115         , _insert_id("0")
 116 {
 117         init(c_plugin, rate);
 118 }
 119
 120 LV2Plugin::LV2Plugin (const LV2Plugin& other)
 121         : Plugin(other)
 122         , _impl(new Impl())
 123         , _features(NULL)
 124         , _insert_id(other._insert_id)
 125 {
 126         init(other._impl->plugin, other._sample_rate);
 127
 128         for (uint32_t i = 0; i < parameter_count(); ++i) {
 129                 _control_data[i] = other._shadow_data[i];
 130                 _shadow_data[i]  = other._shadow_data[i];
 131         }
 132 }
 133
 134 void
 135 LV2Plugin::init(void* c_plugin, framecnt_t rate)
 136 {
 137         DEBUG_TRACE(DEBUG::LV2, "init\n");
 138
 139         _impl->plugin          = (SLV2Plugin)c_plugin;
 140         _impl->ui              = NULL;
 141         _impl->ui_type         = NULL;
 142         _control_data         = 0;
 143         _shadow_data          = 0;
 144         _latency_control_port = 0;
 145         _was_activated        = false;
 146
 147         _instance_access_feature.URI  = "http://lv2plug.in/ns/ext/instance-access";
 148         _data_access_feature.URI      = "http://lv2plug.in/ns/ext/data-access";
 149         _path_support_feature.URI     = LV2_FILES_PATH_SUPPORT_URI;
 150         _new_file_support_feature.URI = LV2_FILES_NEW_FILE_SUPPORT_URI;
 151         _persist_feature.URI          = "http://lv2plug.in/ns/ext/persist";
 152         _persist_feature.data         = NULL;
 153
 154         SLV2Plugin plugin = _impl->plugin;
 155
 156         SLV2Value persist_uri = slv2_value_new_uri(_world.world, _persist_feature.URI);
 157         _supports_persist = slv2_plugin_has_feature(plugin, persist_uri);
 158         slv2_value_free(persist_uri);
 159
 160         _features    = (LV2_Feature**)malloc(sizeof(LV2_Feature*) * 7);
 161         _features[0] = &_instance_access_feature;
 162         _features[1] = &_data_access_feature;
 163         _features[2] = &_path_support_feature;
 164         _features[3] = &_new_file_support_feature;
 165         _features[4] = &_persist_feature;
 166         _features[5] = _uri_map.feature();
 167         _features[6] = NULL;
 168
 169         LV2_Files_Path_Support* path_support = (LV2_Files_Path_Support*)malloc(
 170                 sizeof(LV2_Files_Path_Support));
 171         path_support->host_data = this;
 172         path_support->abstract_path = &lv2_files_abstract_path;
 173         path_support->absolute_path = &lv2_files_absolute_path;
 174         _path_support_feature.data = path_support;
 175
 176         LV2_Files_New_File_Support* new_file_support = (LV2_Files_New_File_Support*)malloc(
 177                 sizeof(LV2_Files_New_File_Support));
 178         new_file_support->host_data = this;
 179         new_file_support->new_file_path = &lv2_files_new_file_path;
 180         _new_file_support_feature.data = new_file_support;
 181
 182         _impl->instance = slv2_plugin_instantiate(plugin, rate, _features);
 183         _impl->name     = slv2_plugin_get_name(plugin);
 184         _impl->author   = slv2_plugin_get_author_name(plugin);
 185
 186         if (_impl->instance == 0) {
 187                 error << _("LV2: Failed to instantiate plugin ") << uri() << endmsg;
 188                 throw failed_constructor();
 189         }
 190
 191         _instance_access_feature.data              = (void*)_impl->instance->lv2_handle;
 192         _data_access_extension_data.extension_data = _impl->instance->lv2_descriptor->extension_data;
 193         _data_access_feature.data                  = &_data_access_extension_data;
 194
 195         if (slv2_plugin_has_feature(plugin, _world.in_place_broken)) {
 196                 error << string_compose(
 197                     _("LV2: \"%1\" cannot be used, since it cannot do inplace processing"),
 198                     slv2_value_as_string(_impl->name)) << endmsg;
 199                 slv2_value_free(_impl->name);
 200                 slv2_value_free(_impl->author);
 201                 throw failed_constructor();
 202         }
 203
 204         _sample_rate = rate;
 205
 206         const uint32_t num_ports    = this->num_ports();
 207         const bool     latent       = slv2_plugin_has_latency(plugin);
 208         const uint32_t latency_port = (latent)
 209             ? slv2_plugin_get_latency_port_index(plugin)
 210                 : 0;
 211
 212         _control_data = new float[num_ports];
 213         _shadow_data  = new float[num_ports];
 214         _defaults     = new float[num_ports];
 215
 216         for (uint32_t i = 0; i < num_ports; ++i) {
 217                 SLV2Port  port = slv2_plugin_get_port_by_index(plugin, i);
 218                 SLV2Value sym  = slv2_port_get_symbol(plugin, port);
 219
 220                 // Store index in map so we can look up index by symbol
 221                 _port_indices.insert(std::make_pair(slv2_value_as_string(sym), i));
 222
 223                 // Get range and default value if applicable
 224                 if (parameter_is_control(i)) {
 225                         SLV2Value def;
 226                         slv2_port_get_range(plugin, port, &def, NULL, NULL);
 227                         _defaults[i] = def ? slv2_value_as_float(def) : 0.0f;
 228                         if (slv2_port_has_property(_impl->plugin, port, _world.srate)) {
 229                                 _defaults[i] *= _session.frame_rate ();
 230                         }
 231                         slv2_value_free(def);
 232
 233                         slv2_instance_connect_port(_impl->instance, i, &_control_data[i]);
 234
 235                         if (latent && ( i == latency_port) ) {
 236                                 _latency_control_port  = &_control_data[i];
 237                                 *_latency_control_port = 0;
 238                         }
 239
 240                         if (parameter_is_input(i)) {
 241                                 _shadow_data[i] = default_value(i);
 242                         }
 243                 } else {
 244                         _defaults[i] = 0.0f;
 245                 }
 246         }
 247
 248         SLV2UIs uis = slv2_plugin_get_uis(plugin);
 249         if (slv2_uis_size(uis) > 0) {
 250 #if defined(HAVE_NEW_SLV2) and defined(HAVE_SUIL)
 251                 // Look for embeddable UI
 252                 SLV2Value ui_type = NULL;
 253                 SLV2_FOREACH(uis, u, uis) {
 254                         SLV2UI    this_ui      = slv2_uis_get(uis, u);
 255                         SLV2Value this_ui_type = NULL;
 256                         if (slv2_ui_is_supported(this_ui,
 257                                                  suil_ui_supported,
 258                                                  _world.gtk_gui,
 259                                                  &this_ui_type)) {
 260                                 // TODO: Multiple UI support
 261                                 _ui      = this_ui;
 262                                 _ui_type = this_ui_type;
 263                                 break;
 264                         }
 265                 }
 266 #else
 267                 // Look for Gtk native UI
 268                 for (unsigned i = 0; i < slv2_uis_size(uis); ++i) {
 269                         SLV2UI ui = slv2_uis_get_at(uis, i);
 270                         if (slv2_ui_is_a(ui, _world.gtk_gui)) {
 271                                 _impl->ui      = ui;
 272                                 _impl->ui_type = _world.gtk_gui;
 273                                 break;
 274                         }
 275                 }
 276 #endif
 277
 278                 // If Gtk UI is not available, try to find external UI
 279                 if (!_impl->ui) {
 280                         for (unsigned i = 0; i < slv2_uis_size(uis); ++i) {
 281                                 SLV2UI ui = slv2_uis_get_at(uis, i);
 282                                 if (slv2_ui_is_a(ui, _world.external_gui)) {
 283                                         _impl->ui      = ui;
 284                                         _impl->ui_type = _world.external_gui;
 285                                         break;
 286                                 }
 287                         }
 288                 }
 289         }
 290
 291         latency_compute_run();
 292 }
 293
 294 LV2Plugin::~LV2Plugin ()
 295 {
 296         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 destroy\n", name()));
 297
 298         deactivate();
 299         cleanup();
 300
 301         slv2_instance_free(_impl->instance);
 302         slv2_value_free(_impl->name);
 303         slv2_value_free(_impl->author);
 304 #if defined(HAVE_NEW_SLV2) and defined(HAVE_SUIL)
 305         slv2_value_free(_impl->ui_type);
 306 #else
 307         /* _ui_type points to a global, so leave it alone */
 308 #endif
 309         delete [] _control_data;
 310         delete [] _shadow_data;
 311 }
 312
 313 bool
 314 LV2Plugin::is_external_ui() const
 315 {
 316         if (!_impl->ui) {
 317                 return false;
 318         }
 319         return slv2_ui_is_a(_impl->ui, _world.external_gui);
 320 }
 321
 322 string
 323 LV2Plugin::unique_id() const
 324 {
 325         return slv2_value_as_uri(slv2_plugin_get_uri(_impl->plugin));
 326 }
 327
 328 const char*
 329 LV2Plugin::uri() const
 330 {
 331         return slv2_value_as_uri(slv2_plugin_get_uri(_impl->plugin));
 332 }
 333
 334 const char*
 335 LV2Plugin::label() const
 336 {
 337         return slv2_value_as_string(_impl->name);
 338 }
 339
 340 const char*
 341 LV2Plugin::name() const
 342 {
 343         return slv2_value_as_string(_impl->name);
 344 }
 345
 346 const char*
 347 LV2Plugin::maker() const
 348 {
 349         return _impl->author ? slv2_value_as_string (_impl->author) : "Unknown";
 350 }
 351
 352 uint32_t
 353 LV2Plugin::num_ports() const
 354 {
 355         return slv2_plugin_get_num_ports(_impl->plugin);
 356 }
 357
 358 uint32_t
 359 LV2Plugin::parameter_count() const
 360 {
 361         return slv2_plugin_get_num_ports(_impl->plugin);
 362 }
 363
 364 float
 365 LV2Plugin::default_value(uint32_t port)
 366 {
 367         return _defaults[port];
 368 }
 369
 370 const char*
 371 LV2Plugin::port_symbol(uint32_t index) const
 372 {
 373         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, index);
 374         if (!port) {
 375                 error << name() << ": Invalid port index " << index << endmsg;
 376         }
 377
 378         SLV2Value sym = slv2_port_get_symbol(_impl->plugin, port);
 379         return slv2_value_as_string(sym);
 380 }
 381
 382 void
 383 LV2Plugin::set_parameter(uint32_t which, float val)
 384 {
 385         DEBUG_TRACE(DEBUG::LV2, string_compose(
 386                             "%1 set parameter %2 to %3\n", name(), which, val));
 387
 388         if (which < slv2_plugin_get_num_ports(_impl->plugin)) {
 389                 _shadow_data[which] = val;
 390         } else {
 391                 warning << string_compose(
 392                     _("Illegal parameter number used with plugin \"%1\". "
 393                       "This is a bug in either %2 or the LV2 plugin <%3>"),
 394                     name(), PROGRAM_NAME, unique_id()) << endmsg;
 395         }
 396
 397         Plugin::set_parameter(which, val);
 398 }
 399
 400 float
 401 LV2Plugin::get_parameter(uint32_t which) const
 402 {
 403         if (parameter_is_input(which)) {
 404                 return (float)_shadow_data[which];
 405         } else {
 406                 return (float)_control_data[which];
 407         }
 408         return 0.0f;
 409 }
 410
 411 uint32_t
 412 LV2Plugin::nth_parameter(uint32_t n, bool& ok) const
 413 {
 414         ok = false;
 415         for (uint32_t c = 0, x = 0; x < slv2_plugin_get_num_ports(_impl->plugin); ++x) {
 416                 if (parameter_is_control(x)) {
 417                         if (c++ == n) {
 418                                 ok = true;
 419                                 return x;
 420                         }
 421                 }
 422         }
 423
 424         return 0;
 425 }
 426
 427 const void*
 428 LV2Plugin::extension_data (const char* uri) const
 429 {
 430         return slv2_instance_get_extension_data(_impl->instance, uri);
 431 }
 432
 433 void*
 434 LV2Plugin::c_plugin ()
 435 {
 436         return _impl->plugin;
 437 }
 438
 439 void*
 440 LV2Plugin::c_ui ()
 441 {
 442         return _impl->ui;
 443 }
 444
 445 void*
 446 LV2Plugin::c_ui_type ()
 447 {
 448         return _impl->ui_type;
 449 }
 450
 451 int
 452 LV2Plugin::lv2_persist_store_callback(void*       host_data,
 453                                       uint32_t    key,
 454                                       const void* value,
 455                                       size_t      size,
 456                                       uint32_t    type,
 457                                       uint32_t    flags)
 458 {
 459         DEBUG_TRACE(DEBUG::LV2, string_compose(
 460                             "persist store %1 (size: %2, type: %3)\n",
 461                             _uri_map.id_to_uri(NULL, key),
 462                             size,
 463                             _uri_map.id_to_uri(NULL, type)));
 464
 465         LV2PersistState* state = (LV2PersistState*)host_data;
 466         state->add_uri(key,  _uri_map.id_to_uri(NULL, key));
 467         state->add_uri(type, _uri_map.id_to_uri(NULL, type));
 468         return state->add_value(key, value, size, type, flags);
 469 }
 470
 471 const void*
 472 LV2Plugin::lv2_persist_retrieve_callback(void*     host_data,
 473                                          uint32_t  key,
 474                                          size_t*   size,
 475                                          uint32_t* type,
 476                                          uint32_t* flags)
 477 {
 478         LV2PersistState* state = (LV2PersistState*)host_data;
 479         LV2PersistState::Values::const_iterator i = state->values.find(key);
 480         if (i == state->values.end()) {
 481                 warning << "LV2 plugin attempted to retrieve nonexistent key: "
 482                         << _uri_map.id_to_uri(NULL, key) << endmsg;
 483                 return NULL;
 484         }
 485         *size = i->second.size;
 486         *type = i->second.type;
 487         *flags = LV2_PERSIST_IS_POD | LV2_PERSIST_IS_PORTABLE; // FIXME
 488         DEBUG_TRACE(DEBUG::LV2, string_compose(
 489                             "persist retrieve %1 = %2 (size: %3, type: %4)\n",
 490                             _uri_map.id_to_uri(NULL, key),
 491                             i->second.value, *size, *type));
 492         return i->second.value;
 493 }
 494
 495 char*
 496 LV2Plugin::lv2_files_abstract_path(LV2_Files_Host_Data host_data,
 497                                    const char*         absolute_path)
 498 {
 499         LV2Plugin* me = (LV2Plugin*)host_data;
 500         if (me->_insert_id == PBD::ID("0")) {
 501                 return g_strdup(absolute_path);
 502         }
 503
 504         const std::string state_dir = Glib::build_filename(me->_session.plugins_dir(),
 505                                                            me->_insert_id.to_s());
 506
 507         char* ret = NULL;
 508         if (strncmp(absolute_path, state_dir.c_str(), state_dir.length())) {
 509                 ret = g_strdup(absolute_path);
 510         } else {
 511                 const std::string path(absolute_path + state_dir.length() + 1);
 512                 ret = g_strndup(path.c_str(), path.length());
 513         }
 514
 515         DEBUG_TRACE(DEBUG::LV2, string_compose("abstract path %1 => %2\n",
 516                                                absolute_path, ret));
 517
 518         return ret;
 519 }
 520
 521 char*
 522 LV2Plugin::lv2_files_absolute_path(LV2_Files_Host_Data host_data,
 523                                    const char*         abstract_path)
 524 {
 525         LV2Plugin* me = (LV2Plugin*)host_data;
 526         if (me->_insert_id == PBD::ID("0")) {
 527                 return g_strdup(abstract_path);
 528         }
 529
 530         char* ret = NULL;
 531         if (g_path_is_absolute(abstract_path)) {
 532                 ret = g_strdup(abstract_path);
 533         } else {
 534                 const std::string apath(abstract_path);
 535                 const std::string state_dir = Glib::build_filename(me->_session.plugins_dir(),
 536                                                                    me->_insert_id.to_s());
 537                 const std::string path = Glib::build_filename(state_dir,
 538                                                               apath);
 539                 ret = g_strndup(path.c_str(), path.length());
 540         }
 541
 542         DEBUG_TRACE(DEBUG::LV2, string_compose("absolute path %1 => %2\n",
 543                                                abstract_path, ret));
 544
 545         return ret;
 546 }
 547
 548 char*
 549 LV2Plugin::lv2_files_new_file_path(LV2_Files_Host_Data host_data,
 550                                    const char*         relative_path)
 551 {
 552         LV2Plugin* me = (LV2Plugin*)host_data;
 553         if (me->_insert_id == PBD::ID("0")) {
 554                 return g_strdup(relative_path);
 555         }
 556
 557         const std::string state_dir = Glib::build_filename(me->_session.plugins_dir(),
 558                                                            me->_insert_id.to_s());
 559         const std::string path = Glib::build_filename(state_dir,
 560                                                       relative_path);
 561
 562         char* dirname = g_path_get_dirname(path.c_str());
 563         g_mkdir_with_parents(dirname, 0744);
 564         free(dirname);
 565
 566         DEBUG_TRACE(DEBUG::LV2, string_compose("new file path %1 => %2\n",
 567                                                relative_path, path));
 568
 569         return g_strndup(path.c_str(), path.length());
 570 }
 571
 572 void
 573 LV2Plugin::add_state(XMLNode* root) const
 574 {
 575         assert(_insert_id != PBD::ID("0"));
 576
 577         XMLNode*    child;
 578         char        buf[16];
 579         LocaleGuard lg(X_("POSIX"));
 580
 581         for (uint32_t i = 0; i < parameter_count(); ++i) {
 582                 if (parameter_is_input(i) && parameter_is_control(i)) {
 583                         child = new XMLNode("Port");
 584                         child->add_property("symbol", port_symbol(i));
 585                         snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
 586                         child->add_property("value", string(buf));
 587                         root->add_child_nocopy(*child);
 588                 }
 589         }
 590
 591         if (_supports_persist) {
 592                 // Create state directory for this plugin instance
 593                 const std::string state_filename = _insert_id.to_s() + ".rdff";
 594                 const std::string state_path     = Glib::build_filename(
 595                         _session.plugins_dir(), state_filename);
 596
 597                 cout << "Saving LV2 plugin state to " << state_path << endl;
 598
 599                 // Get LV2 Persist extension data from plugin instance
 600                 LV2_Persist* persist = (LV2_Persist*)extension_data(
 601                         "http://lv2plug.in/ns/ext/persist");
 602                 if (!persist) {
 603                         warning << string_compose(
 604                             _("Plugin \"%1\% failed to return LV2 persist data"),
 605                             unique_id());
 606                         return;
 607                 }
 608
 609                 // Save plugin state to state object
 610                 LV2PersistState state(_uri_map);
 611                 persist->save(_impl->instance->lv2_handle,
 612                               &LV2Plugin::lv2_persist_store_callback,
 613                               &state);
 614
 615                 // Write state object to RDFF file
 616                 RDFF file = rdff_open(state_path.c_str(), true);
 617                 state.write(file);
 618                 rdff_close(file);
 619
 620                 root->add_property("state-file", state_filename);
 621         }
 622 }
 623
 624 static inline SLV2Value
 625 get_value(SLV2Plugin p, SLV2Value subject, SLV2Value predicate)
 626 {
 627         SLV2Values vs = slv2_plugin_get_value_for_subject(p, subject, predicate);
 628         return vs ? slv2_values_get_at(vs, 0) : NULL;
 629 }
 630
 631 void
 632 LV2Plugin::find_presets()
 633 {
 634         SLV2Value dc_title       = slv2_value_new_uri(_world.world, NS_DC   "title");
 635         SLV2Value pset_hasPreset = slv2_value_new_uri(_world.world, NS_PSET "hasPreset");
 636
 637         SLV2Values presets = slv2_plugin_get_value(_impl->plugin, pset_hasPreset);
 638         for (unsigned i = 0; i < slv2_values_size(presets); ++i) {
 639                 SLV2Value preset = slv2_values_get_at(presets, i);
 640                 SLV2Value name   = get_value(_impl->plugin, preset, dc_title);
 641                 if (name) {
 642                         _presets.insert(std::make_pair(slv2_value_as_string(preset),
 643                                                        PresetRecord(
 644                                                            slv2_value_as_string(preset),
 645                                                            slv2_value_as_string(name))));
 646                 } else {
 647                         warning << string_compose(
 648                             _("Plugin \"%1\% preset \"%2%\" is missing a dc:title\n"),
 649                             unique_id(), slv2_value_as_string(preset));
 650                 }
 651         }
 652         slv2_values_free(presets);
 653
 654         slv2_value_free(pset_hasPreset);
 655         slv2_value_free(dc_title);
 656 }
 657
 658 bool
 659 LV2Plugin::load_preset(PresetRecord r)
 660 {
 661         Plugin::load_preset(r);
 662
 663 #ifdef HAVE_NEW_SLV2
 664         // New (>= 0.7.0) slv2 no longer supports SPARQL, but exposes blank nodes
 665         // so querying ports is possible with the simple/fast API
 666         SLV2Value lv2_port   = slv2_value_new_uri(_world.world, NS_LV2 "port");
 667         SLV2Value lv2_symbol = slv2_value_new_uri(_world.world, NS_LV2 "symbol");
 668         SLV2Value pset_value = slv2_value_new_uri(_world.world, NS_PSET "value");
 669         SLV2Value preset     = slv2_value_new_uri(_world.world, r.uri.c_str());
 670
 671         SLV2Values ports = slv2_plugin_get_value_for_subject(_impl->plugin, preset, lv2_port);
 672         for (unsigned i = 0; i < slv2_values_size(ports); ++i) {
 673                 SLV2Value port   = slv2_values_get_at(ports, i);
 674                 SLV2Value symbol = get_value(_impl->plugin, port, lv2_symbol);
 675                 SLV2Value value  = get_value(_impl->plugin, port, pset_value);
 676                 if (value && slv2_value_is_float(value)) {
 677                         set_parameter(_port_indices[slv2_value_as_string(symbol)],
 678                                       slv2_value_as_float(value));
 679                 }
 680         }
 681         slv2_values_free(ports);
 682
 683         slv2_value_free(preset);
 684         slv2_value_free(pset_value);
 685         slv2_value_free(lv2_symbol);
 686         slv2_value_free(lv2_port);
 687 #else
 688         const string query = string(
 689                 "PREFIX lv2p: <http://lv2plug.in/ns/dev/presets#>\n"
 690                 "PREFIX dc:  <http://dublincore.org/documents/dcmi-namespace/>\n"
 691                 "SELECT ?sym ?val WHERE { <") + r.uri + "> lv2:port ?port . "
 692             " ?port lv2:symbol ?sym ; lv2p:value ?val . }";
 693         SLV2Results values = slv2_plugin_query_sparql(_impl->plugin, query.c_str());
 694         for (; !slv2_results_finished(values); slv2_results_next(values)) {
 695                 SLV2Value sym = slv2_results_get_binding_value(values, 0);
 696                 SLV2Value val = slv2_results_get_binding_value(values, 1);
 697                 if (slv2_value_is_float(val)) {
 698                         uint32_t index = _port_indices[slv2_value_as_string(sym)];
 699                         set_parameter(index, slv2_value_as_float(val));
 700                 }
 701         }
 702         slv2_results_free(values);
 703 #endif
 704         return true;
 705 }
 706
 707 std::string
 708 LV2Plugin::do_save_preset(string /*name*/)
 709 {
 710         return "";
 711 }
 712
 713 void
 714 LV2Plugin::do_remove_preset(string /*name*/)
 715 {}
 716
 717 bool
 718 LV2Plugin::has_editor() const
 719 {
 720         return _impl->ui != NULL;
 721 }
 722
 723 void
 724 LV2Plugin::set_insert_info(const PluginInsert* insert)
 725 {
 726         _insert_id = insert->id();
 727 }
 728
 729 int
 730 LV2Plugin::set_state(const XMLNode& node, int version)
 731 {
 732         XMLNodeList          nodes;
 733         const XMLProperty*   prop;
 734         XMLNodeConstIterator iter;
 735         XMLNode*             child;
 736         const char*          sym;
 737         const char*          value;
 738         uint32_t             port_id;
 739         LocaleGuard          lg(X_("POSIX"));
 740
 741         if (node.name() != state_node_name()) {
 742                 error << _("Bad node sent to LV2Plugin::set_state") << endmsg;
 743                 return -1;
 744         }
 745
 746         if (version < 3000) {
 747                 nodes = node.children("port");
 748         } else {
 749                 nodes = node.children("Port");
 750         }
 751
 752         for (iter = nodes.begin(); iter != nodes.end(); ++iter) {
 753
 754                 child = *iter;
 755
 756                 if ((prop = child->property("symbol")) != 0) {
 757                         sym = prop->value().c_str();
 758                 } else {
 759                         warning << _("LV2: port has no symbol, ignored") << endmsg;
 760                         continue;
 761                 }
 762
 763                 map<string, uint32_t>::iterator i = _port_indices.find(sym);
 764
 765                 if (i != _port_indices.end()) {
 766                         port_id = i->second;
 767                 } else {
 768                         warning << _("LV2: port has unknown index, ignored") << endmsg;
 769                         continue;
 770                 }
 771
 772                 if ((prop = child->property("value")) != 0) {
 773                         value = prop->value().c_str();
 774                 } else {
 775                         warning << _("LV2: port has no value, ignored") << endmsg;
 776                         continue;
 777                 }
 778
 779                 set_parameter(port_id, atof(value));
 780         }
 781
 782         if ((prop = node.property("state-file")) != 0) {
 783                 std::string state_path = Glib::build_filename(_session.plugins_dir(),
 784                                                               prop->value());
 785
 786                 cout << "LV2 state path " << state_path << endl;
 787
 788                 // Get LV2 Persist extension data from plugin instance
 789                 LV2_Persist* persist = (LV2_Persist*)extension_data(
 790                         "http://lv2plug.in/ns/ext/persist");
 791                 if (persist) {
 792                         cout << "Loading LV2 state from " << state_path << endl;
 793                         RDFF            file = rdff_open(state_path.c_str(), false);
 794                         LV2PersistState state(_uri_map);
 795                         state.read(file);
 796                         persist->restore(_impl->instance->lv2_handle,
 797                                          &LV2Plugin::lv2_persist_retrieve_callback,
 798                                          &state);
 799                         rdff_close(file);
 800                 } else {
 801                         warning << string_compose(
 802                             _("Plugin \"%1\% failed to return LV2 persist data"),
 803                             unique_id());
 804                 }
 805         }
 806
 807         latency_compute_run();
 808
 809         return Plugin::set_state(node, version);
 810 }
 811
 812 int
 813 LV2Plugin::get_parameter_descriptor(uint32_t which, ParameterDescriptor& desc) const
 814 {
 815         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, which);
 816
 817         SLV2Value def, min, max;
 818         slv2_port_get_range(_impl->plugin, port, &def, &min, &max);
 819
 820         desc.integer_step = slv2_port_has_property(_impl->plugin, port, _world.integer);
 821         desc.toggled      = slv2_port_has_property(_impl->plugin, port, _world.toggled);
 822         desc.logarithmic  = slv2_port_has_property(_impl->plugin, port, _world.logarithmic);
 823         desc.sr_dependent = slv2_port_has_property(_impl->plugin, port, _world.srate);
 824         desc.label        = slv2_value_as_string(slv2_port_get_name(_impl->plugin, port));
 825         desc.lower        = min ? slv2_value_as_float(min) : 0.0f;
 826         desc.upper        = max ? slv2_value_as_float(max) : 1.0f;
 827         if (desc.sr_dependent) {
 828                 desc.lower *= _session.frame_rate ();
 829                 desc.upper *= _session.frame_rate ();
 830         }
 831
 832         desc.min_unbound  = false; // TODO: LV2 extension required
 833         desc.max_unbound  = false; // TODO: LV2 extension required
 834
 835         if (desc.integer_step) {
 836                 desc.step      = 1.0;
 837                 desc.smallstep = 0.1;
 838                 desc.largestep = 10.0;
 839         } else {
 840                 const float delta = desc.upper - desc.lower;
 841                 desc.step      = delta / 1000.0f;
 842                 desc.smallstep = delta / 10000.0f;
 843                 desc.largestep = delta / 10.0f;
 844         }
 845
 846         slv2_value_free(def);
 847         slv2_value_free(min);
 848         slv2_value_free(max);
 849
 850         return 0;
 851 }
 852
 853 string
 854 LV2Plugin::describe_parameter(Evoral::Parameter which)
 855 {
 856         if (( which.type() == PluginAutomation) && ( which.id() < parameter_count()) ) {
 857                 SLV2Value name = slv2_port_get_name(_impl->plugin,
 858                                                     slv2_plugin_get_port_by_index(_impl->plugin, which.id()));
 859                 string ret(slv2_value_as_string(name));
 860                 slv2_value_free(name);
 861                 return ret;
 862         } else {
 863                 return "??";
 864         }
 865 }
 866
 867 framecnt_t
 868 LV2Plugin::signal_latency() const
 869 {
 870         if (_latency_control_port) {
 871                 return (framecnt_t)floor(*_latency_control_port);
 872         } else {
 873                 return 0;
 874         }
 875 }
 876
 877 set<Evoral::Parameter>
 878 LV2Plugin::automatable() const
 879 {
 880         set<Evoral::Parameter> ret;
 881
 882         for (uint32_t i = 0; i < parameter_count(); ++i) {
 883                 if (parameter_is_input(i) && parameter_is_control(i)) {
 884                         ret.insert(ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
 885                 }
 886         }
 887
 888         return ret;
 889 }
 890
 891 void
 892 LV2Plugin::activate()
 893 {
 894         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 activate\n", name()));
 895
 896         if (!_was_activated) {
 897                 slv2_instance_activate(_impl->instance);
 898                 _was_activated = true;
 899         }
 900 }
 901
 902 void
 903 LV2Plugin::deactivate()
 904 {
 905         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 deactivate\n", name()));
 906
 907         if (_was_activated) {
 908                 slv2_instance_deactivate(_impl->instance);
 909                 _was_activated = false;
 910         }
 911 }
 912
 913 void
 914 LV2Plugin::cleanup()
 915 {
 916         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 cleanup\n", name()));
 917
 918         activate();
 919         deactivate();
 920         slv2_instance_free(_impl->instance);
 921         _impl->instance = NULL;
 922 }
 923
 924 int
 925 LV2Plugin::connect_and_run(BufferSet& bufs,
 926         ChanMapping in_map, ChanMapping out_map,
 927         pframes_t nframes, framecnt_t offset)
 928 {
 929         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 run %2 offset %3\n", name(), nframes, offset));
 930         Plugin::connect_and_run(bufs, in_map, out_map, nframes, offset);
 931
 932         cycles_t then = get_cycles();
 933
 934         uint32_t audio_in_index  = 0;
 935         uint32_t audio_out_index = 0;
 936         uint32_t midi_in_index   = 0;
 937         uint32_t midi_out_index  = 0;
 938         for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
 939                 if (parameter_is_audio(port_index)) {
 940                         if (parameter_is_input(port_index)) {
 941                                 const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++);
 942                                 slv2_instance_connect_port(_impl->instance, port_index,
 943                                                            bufs.get_audio(buf_index).data(offset));
 944                         } else if (parameter_is_output(port_index)) {
 945                                 const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++);
 946                                 //cerr << port_index << " : " << " AUDIO OUT " << buf_index << endl;
 947                                 slv2_instance_connect_port(_impl->instance, port_index,
 948                                                            bufs.get_audio(buf_index).data(offset));
 949                         }
 950                 } else if (parameter_is_midi(port_index)) {
 951                         if (parameter_is_input(port_index)) {
 952                                 const uint32_t buf_index = in_map.get(DataType::MIDI, midi_in_index++);
 953                                 slv2_instance_connect_port(_impl->instance, port_index,
 954                                                            bufs.get_lv2_midi(true, buf_index).data());
 955                         } else if (parameter_is_output(port_index)) {
 956                                 const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
 957                                 slv2_instance_connect_port(_impl->instance, port_index,
 958                                                            bufs.get_lv2_midi(false, buf_index).data());
 959                         }
 960                 } else if (!parameter_is_control(port_index)) {
 961                         // Optional port (it'd better be if we've made it this far...)
 962                         slv2_instance_connect_port(_impl->instance, port_index, NULL);
 963                 }
 964         }
 965
 966         run(nframes);
 967
 968         midi_out_index = 0;
 969         for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
 970                 if (parameter_is_midi(port_index) && parameter_is_output(port_index)) {
 971                         const uint32_t buf_index = out_map.get(DataType::MIDI, midi_out_index++);
 972                         bufs.flush_lv2_midi(true, buf_index);
 973                 }
 974         }
 975
 976         cycles_t now = get_cycles();
 977         set_cycles((uint32_t)(now - then));
 978
 979         return 0;
 980 }
 981
 982 bool
 983 LV2Plugin::parameter_is_control(uint32_t param) const
 984 {
 985         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, param);
 986         return slv2_port_is_a(_impl->plugin, port, _world.control_class);
 987 }
 988
 989 bool
 990 LV2Plugin::parameter_is_audio(uint32_t param) const
 991 {
 992         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, param);
 993         return slv2_port_is_a(_impl->plugin, port, _world.audio_class);
 994 }
 995
 996 bool
 997 LV2Plugin::parameter_is_midi(uint32_t param) const
 998 {
 999         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, param);
1000         return slv2_port_is_a(_impl->plugin, port, _world.event_class);
1001         //      && slv2_port_supports_event(_impl->plugin, port, _world.midi_class);
1002 }
1003
1004 bool
1005 LV2Plugin::parameter_is_output(uint32_t param) const
1006 {
1007         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, param);
1008         return slv2_port_is_a(_impl->plugin, port, _world.output_class);
1009 }
1010
1011 bool
1012 LV2Plugin::parameter_is_input(uint32_t param) const
1013 {
1014         SLV2Port port = slv2_plugin_get_port_by_index(_impl->plugin, param);
1015         return slv2_port_is_a(_impl->plugin, port, _world.input_class);
1016 }
1017
1018 void
1019 LV2Plugin::print_parameter(uint32_t param, char* buf, uint32_t len) const
1020 {
1021         if (buf && len) {
1022                 if (param < parameter_count()) {
1023                         snprintf(buf, len, "%.3f", get_parameter(param));
1024                 } else {
1025                         strcat(buf, "0");
1026                 }
1027         }
1028 }
1029
1030 boost::shared_ptr<Plugin::ScalePoints>
1031 LV2Plugin::get_scale_points(uint32_t port_index) const
1032 {
1033         SLV2Port        port   = slv2_plugin_get_port_by_index(_impl->plugin, port_index);
1034         SLV2ScalePoints points = slv2_port_get_scale_points(_impl->plugin, port);
1035
1036         boost::shared_ptr<Plugin::ScalePoints> ret;
1037         if (!points) {
1038                 return ret;
1039         }
1040
1041         ret = boost::shared_ptr<Plugin::ScalePoints>(new ScalePoints());
1042
1043         for (unsigned i = 0; i < slv2_scale_points_size(points); ++i) {
1044                 SLV2ScalePoint p     = slv2_scale_points_get_at(points, i);
1045                 SLV2Value      label = slv2_scale_point_get_label(p);
1046                 SLV2Value      value = slv2_scale_point_get_value(p);
1047                 if (label && (slv2_value_is_float(value) || slv2_value_is_int(value))) {
1048                         ret->insert(make_pair(slv2_value_as_string(label),
1049                                               slv2_value_as_float(value)));
1050                 }
1051         }
1052
1053         slv2_scale_points_free(points);
1054         return ret;
1055 }
1056
1057 void
1058 LV2Plugin::run(pframes_t nframes)
1059 {
1060         for (uint32_t i = 0; i < parameter_count(); ++i) {
1061                 if (parameter_is_control(i) && parameter_is_input(i)) {
1062                         _control_data[i] = _shadow_data[i];
1063                 }
1064         }
1065
1066         slv2_instance_run(_impl->instance, nframes);
1067 }
1068
1069 void
1070 LV2Plugin::latency_compute_run()
1071 {
1072         if (!_latency_control_port) {
1073                 return;
1074         }
1075
1076         // Run the plugin so that it can set its latency parameter
1077
1078         activate();
1079
1080         uint32_t port_index = 0;
1081         uint32_t in_index   = 0;
1082         uint32_t out_index  = 0;
1083
1084         const framecnt_t bufsize = 1024;
1085         float            buffer[bufsize];
1086
1087         memset(buffer, 0, sizeof(float) * bufsize);
1088
1089         // FIXME: Ensure plugins can handle in-place processing
1090
1091         port_index = 0;
1092
1093         while (port_index < parameter_count()) {
1094                 if (parameter_is_audio(port_index)) {
1095                         if (parameter_is_input(port_index)) {
1096                                 slv2_instance_connect_port(_impl->instance, port_index, buffer);
1097                                 in_index++;
1098                         } else if (parameter_is_output(port_index)) {
1099                                 slv2_instance_connect_port(_impl->instance, port_index, buffer);
1100                                 out_index++;
1101                         }
1102                 }
1103                 port_index++;
1104         }
1105
1106         run(bufsize);
1107         deactivate();
1108 }
1109
1110 LV2World::LV2World()
1111         : world(slv2_world_new())
1112 {
1113         slv2_world_load_all(world);
1114         input_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_INPUT);
1115         output_class    = slv2_value_new_uri(world, SLV2_PORT_CLASS_OUTPUT);
1116         control_class   = slv2_value_new_uri(world, SLV2_PORT_CLASS_CONTROL);
1117         audio_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_AUDIO);
1118         event_class     = slv2_value_new_uri(world, SLV2_PORT_CLASS_EVENT);
1119         midi_class      = slv2_value_new_uri(world, SLV2_EVENT_CLASS_MIDI);
1120         in_place_broken = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "inPlaceBroken");
1121         integer         = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "integer");
1122         toggled         = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "toggled");
1123         srate           = slv2_value_new_uri(world, SLV2_NAMESPACE_LV2 "sampleRate");
1124         gtk_gui         = slv2_value_new_uri(world, NS_UI "GtkUI");
1125         external_gui    = slv2_value_new_uri(world, NS_UI "external");
1126         logarithmic     = slv2_value_new_uri(world, "http://lv2plug.in/ns/dev/extportinfo#logarithmic");
1127 }
1128
1129 LV2World::~LV2World()
1130 {
1131         slv2_value_free(input_class);
1132         slv2_value_free(output_class);
1133         slv2_value_free(control_class);
1134         slv2_value_free(audio_class);
1135         slv2_value_free(event_class);
1136         slv2_value_free(midi_class);
1137         slv2_value_free(in_place_broken);
1138 }
1139
1140 LV2PluginInfo::LV2PluginInfo (void* c_plugin)
1141         : _c_plugin(c_plugin)
1142 {
1143         type = ARDOUR::LV2;
1144 }
1145
1146 LV2PluginInfo::~LV2PluginInfo()
1147 {}
1148
1149 PluginPtr
1150 LV2PluginInfo::load(Session& session)
1151 {
1152         try {
1153                 PluginPtr plugin;
1154
1155                 plugin.reset(new LV2Plugin(session.engine(), session,
1156                                            (SLV2Plugin)_c_plugin,
1157                                            session.frame_rate()));
1158
1159                 plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this)));
1160                 return plugin;
1161         } catch (failed_constructor& err) {
1162                 return PluginPtr((Plugin*)0);
1163         }
1164
1165         return PluginPtr();
1166 }
1167
1168 PluginInfoList*
1169 LV2PluginInfo::discover()
1170 {
1171         PluginInfoList* plugs   = new PluginInfoList;
1172         SLV2Plugins     plugins = slv2_world_get_all_plugins(_world.world);
1173
1174         cerr << "LV2: Discovering " << slv2_plugins_size(plugins) << " plugins" << endl;
1175
1176         for (unsigned i = 0; i < slv2_plugins_size(plugins); ++i) {
1177                 SLV2Plugin       p = slv2_plugins_get_at(plugins, i);
1178                 LV2PluginInfoPtr info(new LV2PluginInfo(p));
1179
1180                 SLV2Value name = slv2_plugin_get_name(p);
1181
1182                 if (!name) {
1183                         cerr << "LV2: invalid plugin\n";
1184                         continue;
1185                 }
1186
1187                 info->type = LV2;
1188
1189                 info->name = string(slv2_value_as_string(name));
1190                 slv2_value_free(name);
1191
1192                 SLV2PluginClass pclass = slv2_plugin_get_class(p);
1193                 SLV2Value       label  = slv2_plugin_class_get_label(pclass);
1194                 info->category = slv2_value_as_string(label);
1195
1196                 SLV2Value author_name = slv2_plugin_get_author_name(p);
1197                 info->creator = author_name ? string(slv2_value_as_string(author_name)) : "Unknown";
1198                 slv2_value_free(author_name);
1199
1200                 info->path = "/NOPATH"; // Meaningless for LV2
1201
1202                 info->n_inputs.set_audio(
1203                         slv2_plugin_get_num_ports_of_class(
1204                                 p, _world.input_class, _world.audio_class, NULL));
1205                 info->n_inputs.set_midi(
1206                         slv2_plugin_get_num_ports_of_class(
1207                                 p, _world.input_class, _world.event_class, NULL));
1208
1209                 info->n_outputs.set_audio(
1210                         slv2_plugin_get_num_ports_of_class(
1211                                 p, _world.output_class, _world.audio_class, NULL));
1212                 info->n_outputs.set_midi(
1213                         slv2_plugin_get_num_ports_of_class(
1214                                 p, _world.output_class, _world.event_class, NULL));
1215
1216                 info->unique_id = slv2_value_as_uri(slv2_plugin_get_uri(p));
1217                 info->index     = 0; // Meaningless for LV2
1218
1219                 plugs->push_back(info);
1220         }
1221
1222         cerr << "Done LV2 discovery" << endl;
1223
1224         return plugs;
1225 }