libs/ardour/lv2_plugin.cc

   1 /*
   2     Copyright (C) 2008-2012 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 #include <string>
  21 #include <vector>
  22
  23 #include <cmath>
  24 #include <cstdlib>
  25 #include <cstring>
  26
  27 #include <giomm/file.h>
  28 #include <glib/gprintf.h>
  29 #include <glibmm.h>
  30
  31 #include <boost/utility.hpp>
  32
  33 #include "pbd/compose.h"
  34 #include "pbd/error.h"
  35 #include "pbd/xml++.h"
  36
  37 #include "libardour-config.h"
  38
  39 #include "ardour/types.h"
  40 #include "ardour/audio_buffer.h"
  41 #include "ardour/audioengine.h"
  42 #include "ardour/debug.h"
  43 #include "ardour/lv2_plugin.h"
  44 #include "ardour/session.h"
  45 #include "ardour/tempo.h"
  46 #include "ardour/worker.h"
  47
  48 #include "i18n.h"
  49 #include <locale.h>
  50
  51 #include <lilv/lilv.h>
  52
  53 #include "lv2/lv2plug.in/ns/ext/atom/atom.h"
  54 #include "lv2/lv2plug.in/ns/ext/log/log.h"
  55 #include "lv2/lv2plug.in/ns/ext/options/options.h"
  56 #include "lv2/lv2plug.in/ns/ext/port-props/port-props.h"
  57 #include "lv2/lv2plug.in/ns/ext/presets/presets.h"
  58 #include "lv2/lv2plug.in/ns/ext/state/state.h"
  59 #include "lv2/lv2plug.in/ns/ext/time/time.h"
  60 #include "lv2/lv2plug.in/ns/ext/worker/worker.h"
  61 #include "lv2/lv2plug.in/ns/extensions/ui/ui.h"
  62 #ifdef HAVE_NEW_LV2
  63 #include "lv2/lv2plug.in/ns/ext/buf-size/buf-size.h"
  64 #endif
  65
  66 #include "lv2_evbuf.h"
  67
  68 #ifdef HAVE_SUIL
  69 #include <suil/suil.h>
  70 #endif
  71
  72 using namespace std;
  73 using namespace ARDOUR;
  74 using namespace PBD;
  75
  76 URIMap LV2Plugin::_uri_map;
  77 uint32_t LV2Plugin::_midi_event_type = _uri_map.uri_to_id(
  78         "http://lv2plug.in/ns/ext/midi#MidiEvent");
  79 uint32_t LV2Plugin::_chunk_type = _uri_map.uri_to_id(
  80         LV2_ATOM__Chunk);
  81 uint32_t LV2Plugin::_sequence_type = _uri_map.uri_to_id(
  82         LV2_ATOM__Sequence);
  83 uint32_t LV2Plugin::_event_transfer_type = _uri_map.uri_to_id(
  84         LV2_ATOM__eventTransfer);
  85 uint32_t LV2Plugin::_path_type = _uri_map.uri_to_id(
  86         LV2_ATOM__Path);
  87 uint32_t LV2Plugin::_log_Error = _uri_map.uri_to_id(
  88         LV2_LOG__Error);
  89 uint32_t LV2Plugin::_log_Warning = _uri_map.uri_to_id(
  90         LV2_LOG__Warning);
  91 uint32_t LV2Plugin::_log_Note = _uri_map.uri_to_id(
  92         LV2_LOG__Note);
  93
  94 class LV2World : boost::noncopyable {
  95 public:
  96         LV2World ();
  97         ~LV2World ();
  98
  99         LilvWorld* world;
 100
 101         LilvNode* atom_AtomPort;
 102         LilvNode* atom_Chunk;
 103         LilvNode* atom_Sequence;
 104         LilvNode* atom_bufferType;
 105         LilvNode* atom_supports;
 106         LilvNode* atom_eventTransfer;
 107         LilvNode* ev_EventPort;
 108         LilvNode* ext_logarithmic;
 109         LilvNode* lv2_AudioPort;
 110         LilvNode* lv2_ControlPort;
 111         LilvNode* lv2_InputPort;
 112         LilvNode* lv2_OutputPort;
 113         LilvNode* lv2_enumeration;
 114         LilvNode* lv2_inPlaceBroken;
 115         LilvNode* lv2_integer;
 116         LilvNode* lv2_sampleRate;
 117         LilvNode* lv2_toggled;
 118         LilvNode* midi_MidiEvent;
 119         LilvNode* rdfs_comment;
 120         LilvNode* ui_GtkUI;
 121         LilvNode* ui_external;
 122 };
 123
 124 static LV2World _world;
 125
 126 /* worker extension */
 127
 128 /** Called by the plugin to schedule non-RT work. */
 129 static LV2_Worker_Status
 130 work_schedule(LV2_Worker_Schedule_Handle handle,
 131               uint32_t                   size,
 132               const void*                data)
 133 {
 134         LV2Plugin* plugin = (LV2Plugin*)handle;
 135         if (plugin->session().engine().freewheeling()) {
 136                 // Freewheeling, do the work immediately in this (audio) thread
 137                 return (LV2_Worker_Status)plugin->work(size, data);
 138         } else {
 139                 // Enqueue message for the worker thread
 140                 return plugin->worker()->schedule(size, data) ?
 141                         LV2_WORKER_SUCCESS : LV2_WORKER_ERR_UNKNOWN;
 142         }
 143 }
 144
 145 /** Called by the plugin to respond to non-RT work. */
 146 static LV2_Worker_Status
 147 work_respond(LV2_Worker_Respond_Handle handle,
 148              uint32_t                  size,
 149              const void*               data)
 150 {
 151         LV2Plugin* plugin = (LV2Plugin*)handle;
 152         if (plugin->session().engine().freewheeling()) {
 153                 // Freewheeling, respond immediately in this (audio) thread
 154                 return (LV2_Worker_Status)plugin->work_response(size, data);
 155         } else {
 156                 // Enqueue response for the worker
 157                 return plugin->worker()->respond(size, data) ?
 158                         LV2_WORKER_SUCCESS : LV2_WORKER_ERR_UNKNOWN;
 159         }
 160 }
 161
 162 /* log extension */
 163
 164 static int
 165 log_vprintf(LV2_Log_Handle handle,
 166             LV2_URID       type,
 167             const char*    fmt,
 168             va_list        args)
 169 {
 170         char* str = NULL;
 171         const int ret = g_vasprintf(&str, fmt, args);
 172         if (type == LV2Plugin::_log_Error) {
 173                 error << str << endmsg;
 174         } else if (type == LV2Plugin::_log_Warning) {
 175                 warning << str << endmsg;
 176         } else if (type == LV2Plugin::_log_Note) {
 177                 info << str << endmsg;
 178         }
 179         // TODO: Togglable log:Trace message support
 180         return ret;
 181 }
 182
 183 static int
 184 log_printf(LV2_Log_Handle handle,
 185            LV2_URID       type,
 186            const char*    fmt, ...)
 187 {
 188         va_list args;
 189         va_start(args, fmt);
 190         const int ret = log_vprintf(handle, type, fmt, args);
 191         va_end(args);
 192         return ret;
 193 }
 194
 195 struct LV2Plugin::Impl {
 196         Impl() : plugin(0), ui(0), ui_type(0), name(0), author(0), instance(0)
 197                , work_iface(0)
 198                , state(0)
 199         {}
 200
 201         /** Find the LV2 input port with the given designation.
 202          * If found, bufptrs[port_index] will be set to bufptr.
 203          */
 204         LilvPort* designated_input (const char* uri, void** bufptrs[], void** bufptr);
 205
 206         const LilvPlugin*           plugin;
 207         const LilvUI*               ui;
 208         const LilvNode*             ui_type;
 209         LilvNode*                   name;
 210         LilvNode*                   author;
 211         LilvInstance*               instance;
 212         const LV2_Worker_Interface* work_iface;
 213         LilvState*                  state;
 214 };
 215
 216 LV2Plugin::LV2Plugin (AudioEngine& engine,
 217                       Session&     session,
 218                       const void*  c_plugin,
 219                       framecnt_t   rate)
 220         : Plugin (engine, session)
 221         , Workee ()
 222         , _impl(new Impl())
 223         , _features(NULL)
 224         , _worker(NULL)
 225         , _insert_id("0")
 226 {
 227         init(c_plugin, rate);
 228 }
 229
 230 LV2Plugin::LV2Plugin (const LV2Plugin& other)
 231         : Plugin (other)
 232         , Workee ()
 233         , _impl(new Impl())
 234         , _features(NULL)
 235         , _worker(NULL)
 236         , _insert_id(other._insert_id)
 237 {
 238         init(other._impl->plugin, other._sample_rate);
 239
 240         for (uint32_t i = 0; i < parameter_count(); ++i) {
 241                 _control_data[i] = other._shadow_data[i];
 242                 _shadow_data[i]  = other._shadow_data[i];
 243         }
 244 }
 245
 246 void
 247 LV2Plugin::init(const void* c_plugin, framecnt_t rate)
 248 {
 249         DEBUG_TRACE(DEBUG::LV2, "init\n");
 250
 251         _impl->plugin           = (const LilvPlugin*)c_plugin;
 252         _impl->ui               = NULL;
 253         _impl->ui_type          = NULL;
 254         _to_ui                  = NULL;
 255         _from_ui                = NULL;
 256         _control_data           = 0;
 257         _shadow_data            = 0;
 258         _atom_ev_buffers        = 0;
 259         _ev_buffers             = 0;
 260         _bpm_control_port       = 0;
 261         _freewheel_control_port = 0;
 262         _latency_control_port   = 0;
 263         _block_length           = _engine.frames_per_cycle();
 264         _seq_size               = _engine.raw_buffer_size(DataType::MIDI);
 265         _state_version          = 0;
 266         _was_activated          = false;
 267         _has_state_interface    = false;
 268
 269         _instance_access_feature.URI = "http://lv2plug.in/ns/ext/instance-access";
 270         _data_access_feature.URI     = "http://lv2plug.in/ns/ext/data-access";
 271         _make_path_feature.URI       = LV2_STATE__makePath;
 272         _log_feature.URI             = LV2_LOG__log;
 273         _work_schedule_feature.URI   = LV2_WORKER__schedule;
 274         _work_schedule_feature.data  = NULL;
 275
 276         const LilvPlugin* plugin = _impl->plugin;
 277
 278         LilvNode* state_iface_uri = lilv_new_uri(_world.world, LV2_STATE__interface);
 279         LilvNode* state_uri       = lilv_new_uri(_world.world, LV2_STATE_URI);
 280         _has_state_interface =
 281                 // What plugins should have (lv2:extensionData state:Interface)
 282                 lilv_plugin_has_extension_data(plugin, state_iface_uri)
 283                 // What some outdated/incorrect ones have
 284                 || lilv_plugin_has_feature(plugin, state_uri);
 285         lilv_node_free(state_uri);
 286         lilv_node_free(state_iface_uri);
 287
 288         _features    = (LV2_Feature**)calloc(10, sizeof(LV2_Feature*));
 289         _features[0] = &_instance_access_feature;
 290         _features[1] = &_data_access_feature;
 291         _features[2] = &_make_path_feature;
 292         _features[3] = _uri_map.uri_map_feature();
 293         _features[4] = _uri_map.urid_map_feature();
 294         _features[5] = _uri_map.urid_unmap_feature();
 295         _features[6] = &_log_feature;
 296
 297         unsigned n_features = 7;
 298 #ifdef HAVE_NEW_LV2
 299         LV2_URID atom_Int = _uri_map.uri_to_id(LV2_ATOM__Int);
 300         LV2_Options_Option options[] = {
 301                 { _uri_map.uri_to_id(LV2_BUF_SIZE__minBlockLength),
 302                   sizeof(int32_t), atom_Int, &_block_length },
 303                 { _uri_map.uri_to_id(LV2_BUF_SIZE__maxBlockLength),
 304                   sizeof(int32_t), atom_Int, &_block_length },
 305                 { _uri_map.uri_to_id(LV2_BUF_SIZE__sequenceSize),
 306                   sizeof(int32_t), atom_Int, &_seq_size },
 307                 { 0, 0, 0, NULL }
 308         };
 309
 310         _options_feature.URI    = LV2_OPTIONS__options;
 311         _options_feature.data   = options;
 312         _features[n_features++] = &_options_feature;
 313 #endif
 314
 315         LV2_State_Make_Path* make_path = (LV2_State_Make_Path*)malloc(
 316                 sizeof(LV2_State_Make_Path));
 317         make_path->handle = this;
 318         make_path->path = &lv2_state_make_path;
 319         _make_path_feature.data = make_path;
 320
 321         LV2_Log_Log* log = (LV2_Log_Log*)malloc(sizeof(LV2_Log_Log));
 322         log->handle  = this;
 323         log->printf  = &log_printf;
 324         log->vprintf = &log_vprintf;
 325         _log_feature.data = log;
 326
 327         LilvNode* worker_schedule = lilv_new_uri(_world.world, LV2_WORKER__schedule);
 328         if (lilv_plugin_has_feature(plugin, worker_schedule)) {
 329                 LV2_Worker_Schedule* schedule = (LV2_Worker_Schedule*)malloc(
 330                         sizeof(LV2_Worker_Schedule));
 331                 _worker                     = new Worker(this, 4096);
 332                 schedule->handle            = this;
 333                 schedule->schedule_work     = work_schedule;
 334                 _work_schedule_feature.data = schedule;
 335                 _features[n_features++]     = &_work_schedule_feature;
 336         }
 337         lilv_node_free(worker_schedule);
 338
 339         _impl->instance = lilv_plugin_instantiate(plugin, rate, _features);
 340         _impl->name     = lilv_plugin_get_name(plugin);
 341         _impl->author   = lilv_plugin_get_author_name(plugin);
 342
 343         if (_impl->instance == 0) {
 344                 error << _("LV2: Failed to instantiate plugin ") << uri() << endmsg;
 345                 throw failed_constructor();
 346         }
 347
 348         _instance_access_feature.data              = (void*)_impl->instance->lv2_handle;
 349         _data_access_extension_data.extension_data = _impl->instance->lv2_descriptor->extension_data;
 350         _data_access_feature.data                  = &_data_access_extension_data;
 351
 352         _impl->work_iface = (const LV2_Worker_Interface*)extension_data(
 353                 LV2_WORKER__interface);
 354
 355         if (lilv_plugin_has_feature(plugin, _world.lv2_inPlaceBroken)) {
 356                 error << string_compose(
 357                     _("LV2: \"%1\" cannot be used, since it cannot do inplace processing"),
 358                     lilv_node_as_string(_impl->name)) << endmsg;
 359                 lilv_node_free(_impl->name);
 360                 lilv_node_free(_impl->author);
 361                 throw failed_constructor();
 362         }
 363
 364         _sample_rate = rate;
 365
 366         const uint32_t num_ports = this->num_ports();
 367         for (uint32_t i = 0; i < num_ports; ++i) {
 368                 const LilvPort* port  = lilv_plugin_get_port_by_index(_impl->plugin, i);
 369                 PortFlags       flags = 0;
 370
 371                 if (lilv_port_is_a(_impl->plugin, port, _world.lv2_OutputPort)) {
 372                         flags |= PORT_OUTPUT;
 373                 } else if (lilv_port_is_a(_impl->plugin, port, _world.lv2_InputPort)) {
 374                         flags |= PORT_INPUT;
 375                 } else {
 376                         error << string_compose(
 377                                 "LV2: \"%1\" port %2 is neither input nor output",
 378                                 lilv_node_as_string(_impl->name), i) << endmsg;
 379                         throw failed_constructor();
 380                 }
 381
 382                 if (lilv_port_is_a(_impl->plugin, port, _world.lv2_ControlPort)) {
 383                         flags |= PORT_CONTROL;
 384                 } else if (lilv_port_is_a(_impl->plugin, port, _world.lv2_AudioPort)) {
 385                         flags |= PORT_AUDIO;
 386                 } else if (lilv_port_is_a(_impl->plugin, port, _world.ev_EventPort)) {
 387                         flags |= PORT_EVENT;
 388                 } else if (lilv_port_is_a(_impl->plugin, port, _world.atom_AtomPort)) {
 389                         LilvNodes* buffer_types = lilv_port_get_value(
 390                                 _impl->plugin, port, _world.atom_bufferType);
 391                         LilvNodes* atom_supports = lilv_port_get_value(
 392                                 _impl->plugin, port, _world.atom_supports);
 393
 394                                 if (lilv_nodes_contains(buffer_types, _world.atom_Sequence)
 395                                                 && lilv_nodes_contains(atom_supports, _world.midi_MidiEvent)
 396                                                 ) {
 397                                         flags |= PORT_MESSAGE;
 398                                 } else {
 399                                         flags |= PORT_ATOM;
 400                                 }
 401                         lilv_nodes_free(buffer_types);
 402                         lilv_nodes_free(atom_supports);
 403                 } else {
 404                         error << string_compose(
 405                                 "LV2: \"%1\" port %2 has no known data type",
 406                                 lilv_node_as_string(_impl->name), i) << endmsg;
 407                         throw failed_constructor();
 408                 }
 409
 410                 _port_flags.push_back(flags);
 411         }
 412
 413         _control_data = new float[num_ports];
 414         _shadow_data  = new float[num_ports];
 415         _defaults     = new float[num_ports];
 416         _ev_buffers   = new LV2_Evbuf*[num_ports];
 417         memset(_ev_buffers, 0, sizeof(LV2_Evbuf*) * num_ports);
 418
 419         const bool     latent        = lilv_plugin_has_latency(plugin);
 420         const uint32_t latency_index = (latent)
 421                 ? lilv_plugin_get_latency_port_index(plugin)
 422                 : 0;
 423
 424         // Build an array of pointers to special parameter buffers
 425         void*** params = new void**[num_ports];
 426         for (uint32_t i = 0; i < num_ports; ++i) {
 427                 params[i] = NULL;
 428         }
 429         _impl->designated_input (LV2_TIME__beatsPerMinute, params, (void**)&_bpm_control_port);
 430         _impl->designated_input (LV2_CORE__freeWheeling, params, (void**)&_freewheel_control_port);
 431
 432         for (uint32_t i = 0; i < num_ports; ++i) {
 433                 const LilvPort* port = lilv_plugin_get_port_by_index(plugin, i);
 434                 const LilvNode* sym  = lilv_port_get_symbol(plugin, port);
 435
 436                 // Store index in map so we can look up index by symbol
 437                 _port_indices.insert(std::make_pair(lilv_node_as_string(sym), i));
 438
 439                 // Get range and default value if applicable
 440                 if (parameter_is_control(i)) {
 441                         LilvNode* def;
 442                         lilv_port_get_range(plugin, port, &def, NULL, NULL);
 443                         _defaults[i] = def ? lilv_node_as_float(def) : 0.0f;
 444                         if (lilv_port_has_property (plugin, port, _world.lv2_sampleRate)) {
 445                                 _defaults[i] *= _session.frame_rate ();
 446                         }
 447                         lilv_node_free(def);
 448
 449                         lilv_instance_connect_port(_impl->instance, i, &_control_data[i]);
 450
 451                         if (latent && i == latency_index) {
 452                                 _latency_control_port  = &_control_data[i];
 453                                 *_latency_control_port = 0;
 454                         }
 455
 456                         if (parameter_is_input(i)) {
 457                                 _shadow_data[i] = default_value(i);
 458                                 if (params[i]) {
 459                                         *params[i] = (void*)&_shadow_data[i];
 460                                 }
 461                         }
 462                 } else {
 463                         _defaults[i] = 0.0f;
 464                 }
 465         }
 466
 467         delete[] params;
 468
 469         LilvUIs* uis = lilv_plugin_get_uis(plugin);
 470         if (lilv_uis_size(uis) > 0) {
 471 #ifdef HAVE_SUIL
 472                 // Look for embeddable UI
 473                 LILV_FOREACH(uis, u, uis) {
 474                         const LilvUI*   this_ui      = lilv_uis_get(uis, u);
 475                         const LilvNode* this_ui_type = NULL;
 476                         if (lilv_ui_is_supported(this_ui,
 477                                                  suil_ui_supported,
 478                                                  _world.ui_GtkUI,
 479                                                  &this_ui_type)) {
 480                                 // TODO: Multiple UI support
 481                                 _impl->ui      = this_ui;
 482                                 _impl->ui_type = this_ui_type;
 483                                 break;
 484                         }
 485                 }
 486 #else
 487                 // Look for Gtk native UI
 488                 LILV_FOREACH(uis, i, uis) {
 489                         const LilvUI* ui = lilv_uis_get(uis, i);
 490                         if (lilv_ui_is_a(ui, _world.ui_GtkUI)) {
 491                                 _impl->ui      = ui;
 492                                 _impl->ui_type = _world.ui_GtkUI;
 493                                 break;
 494                         }
 495                 }
 496 #endif
 497
 498                 // If Gtk UI is not available, try to find external UI
 499                 if (!_impl->ui) {
 500                         LILV_FOREACH(uis, i, uis) {
 501                                 const LilvUI* ui = lilv_uis_get(uis, i);
 502                                 if (lilv_ui_is_a(ui, _world.ui_external)) {
 503                                         _impl->ui      = ui;
 504                                         _impl->ui_type = _world.ui_external;
 505                                         break;
 506                                 }
 507                         }
 508                 }
 509         }
 510
 511         allocate_atom_event_buffers();
 512         latency_compute_run();
 513 }
 514
 515 LV2Plugin::~LV2Plugin ()
 516 {
 517         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 destroy\n", name()));
 518
 519         deactivate();
 520         cleanup();
 521
 522         lilv_instance_free(_impl->instance);
 523         lilv_node_free(_impl->name);
 524         lilv_node_free(_impl->author);
 525
 526         free(_features);
 527         free(_make_path_feature.data);
 528         free(_work_schedule_feature.data);
 529
 530         delete _to_ui;
 531         delete _from_ui;
 532         delete _worker;
 533
 534         if (_atom_ev_buffers) {
 535                 LV2_Evbuf**  b = _atom_ev_buffers;
 536                 while (*b) {
 537                         free(*b);
 538                         b++;
 539                 }
 540                 free(_atom_ev_buffers);
 541         }
 542
 543         delete [] _control_data;
 544         delete [] _shadow_data;
 545         delete [] _ev_buffers;
 546 }
 547
 548 bool
 549 LV2Plugin::is_external_ui() const
 550 {
 551         if (!_impl->ui) {
 552                 return false;
 553         }
 554         return lilv_ui_is_a(_impl->ui, _world.ui_external);
 555 }
 556
 557 bool
 558 LV2Plugin::ui_is_resizable () const
 559 {
 560         const LilvNode* s   = lilv_ui_get_uri(_impl->ui);
 561         LilvNode*       p   = lilv_new_uri(_world.world, LV2_CORE__optionalFeature);
 562         LilvNode*       fs  = lilv_new_uri(_world.world, LV2_UI__fixedSize);
 563         LilvNode*       nrs = lilv_new_uri(_world.world, LV2_UI__noUserResize);
 564
 565         LilvNodes* fs_matches = lilv_world_find_nodes(_world.world, s, p, fs);
 566         LilvNodes* nrs_matches = lilv_world_find_nodes(_world.world, s, p, nrs);
 567
 568         lilv_nodes_free(nrs_matches);
 569         lilv_nodes_free(fs_matches);
 570         lilv_node_free(nrs);
 571         lilv_node_free(fs);
 572         lilv_node_free(p);
 573
 574         return !fs_matches && !nrs_matches;
 575 }
 576
 577 string
 578 LV2Plugin::unique_id() const
 579 {
 580         return lilv_node_as_uri(lilv_plugin_get_uri(_impl->plugin));
 581 }
 582
 583 const char*
 584 LV2Plugin::uri() const
 585 {
 586         return lilv_node_as_uri(lilv_plugin_get_uri(_impl->plugin));
 587 }
 588
 589 const char*
 590 LV2Plugin::label() const
 591 {
 592         return lilv_node_as_string(_impl->name);
 593 }
 594
 595 const char*
 596 LV2Plugin::name() const
 597 {
 598         return lilv_node_as_string(_impl->name);
 599 }
 600
 601 const char*
 602 LV2Plugin::maker() const
 603 {
 604         return _impl->author ? lilv_node_as_string (_impl->author) : "Unknown";
 605 }
 606
 607 uint32_t
 608 LV2Plugin::num_ports() const
 609 {
 610         return lilv_plugin_get_num_ports(_impl->plugin);
 611 }
 612
 613 uint32_t
 614 LV2Plugin::parameter_count() const
 615 {
 616         return lilv_plugin_get_num_ports(_impl->plugin);
 617 }
 618
 619 float
 620 LV2Plugin::default_value(uint32_t port)
 621 {
 622         return _defaults[port];
 623 }
 624
 625 const char*
 626 LV2Plugin::port_symbol(uint32_t index) const
 627 {
 628         const LilvPort* port = lilv_plugin_get_port_by_index(_impl->plugin, index);
 629         if (!port) {
 630                 error << name() << ": Invalid port index " << index << endmsg;
 631         }
 632
 633         const LilvNode* sym = lilv_port_get_symbol(_impl->plugin, port);
 634         return lilv_node_as_string(sym);
 635 }
 636
 637 uint32_t
 638 LV2Plugin::port_index (const char* symbol) const
 639 {
 640         const map<string, uint32_t>::const_iterator i = _port_indices.find(symbol);
 641         if (i != _port_indices.end()) {
 642                 return  i->second;
 643         } else {
 644                 warning << string_compose(_("LV2: Unknown port %1"), symbol) << endmsg;
 645                 return (uint32_t)-1;
 646         }
 647 }
 648
 649 void
 650 LV2Plugin::set_parameter(uint32_t which, float val)
 651 {
 652         DEBUG_TRACE(DEBUG::LV2, string_compose(
 653                             "%1 set parameter %2 to %3\n", name(), which, val));
 654
 655         if (which < lilv_plugin_get_num_ports(_impl->plugin)) {
 656                 if (get_parameter (which) == val) {
 657                         return;
 658                 }
 659
 660                 _shadow_data[which] = val;
 661         } else {
 662                 warning << string_compose(
 663                     _("Illegal parameter number used with plugin \"%1\". "
 664                       "This is a bug in either %2 or the LV2 plugin <%3>"),
 665                     name(), PROGRAM_NAME, unique_id()) << endmsg;
 666         }
 667
 668         Plugin::set_parameter(which, val);
 669 }
 670
 671 float
 672 LV2Plugin::get_parameter(uint32_t which) const
 673 {
 674         if (parameter_is_input(which)) {
 675                 return (float)_shadow_data[which];
 676         } else {
 677                 return (float)_control_data[which];
 678         }
 679         return 0.0f;
 680 }
 681
 682 std::string
 683 LV2Plugin::get_docs() const
 684 {
 685         LilvNodes* comments = lilv_plugin_get_value(_impl->plugin, _world.rdfs_comment);
 686         if (comments) {
 687                 const std::string docs(lilv_node_as_string(lilv_nodes_get_first(comments)));
 688                 lilv_nodes_free(comments);
 689                 return docs;
 690         }
 691
 692         return "";
 693 }
 694
 695 std::string
 696 LV2Plugin::get_parameter_docs(uint32_t which) const
 697 {
 698         LilvNodes* comments = lilv_port_get_value(
 699                 _impl->plugin,
 700                 lilv_plugin_get_port_by_index(_impl->plugin, which),
 701                 _world.rdfs_comment);
 702
 703         if (comments) {
 704                 const std::string docs(lilv_node_as_string(lilv_nodes_get_first(comments)));
 705                 lilv_nodes_free(comments);
 706                 return docs;
 707         }
 708
 709         return "";
 710 }
 711
 712 uint32_t
 713 LV2Plugin::nth_parameter(uint32_t n, bool& ok) const
 714 {
 715         ok = false;
 716         for (uint32_t c = 0, x = 0; x < lilv_plugin_get_num_ports(_impl->plugin); ++x) {
 717                 if (parameter_is_control(x)) {
 718                         if (c++ == n) {
 719                                 ok = true;
 720                                 return x;
 721                         }
 722                 }
 723         }
 724
 725         return 0;
 726 }
 727
 728 const void*
 729 LV2Plugin::extension_data (const char* uri) const
 730 {
 731         return lilv_instance_get_extension_data(_impl->instance, uri);
 732 }
 733
 734 const void*
 735 LV2Plugin::c_plugin ()
 736 {
 737         return _impl->plugin;
 738 }
 739
 740 const void*
 741 LV2Plugin::c_ui ()
 742 {
 743         return (const void*)_impl->ui;
 744 }
 745
 746 const void*
 747 LV2Plugin::c_ui_type ()
 748 {
 749         return (const void*)_impl->ui_type;
 750 }
 751
 752 /** Directory for all plugin state. */
 753 const std::string
 754 LV2Plugin::plugin_dir() const
 755 {
 756         return Glib::build_filename(_session.plugins_dir(), _insert_id.to_s());
 757 }
 758
 759 /** Directory for files created by the plugin (except during save). */
 760 const std::string
 761 LV2Plugin::scratch_dir() const
 762 {
 763         return Glib::build_filename(plugin_dir(), "scratch");
 764 }
 765
 766 /** Directory for snapshots of files in the scratch directory. */
 767 const std::string
 768 LV2Plugin::file_dir() const
 769 {
 770         return Glib::build_filename(plugin_dir(), "files");
 771 }
 772
 773 /** Directory to save state snapshot version @c num into. */
 774 const std::string
 775 LV2Plugin::state_dir(unsigned num) const
 776 {
 777         return Glib::build_filename(plugin_dir(), string_compose("state%1", num));
 778 }
 779
 780 /** Implementation of state:makePath for files created at instantiation time.
 781  * Note this is not used for files created at save time (Lilv deals with that).
 782  */
 783 char*
 784 LV2Plugin::lv2_state_make_path(LV2_State_Make_Path_Handle handle,
 785                                const char*                path)
 786 {
 787         LV2Plugin* me = (LV2Plugin*)handle;
 788         if (me->_insert_id == PBD::ID("0")) {
 789                 warning << string_compose(
 790                         "File path \"%1\" requested but LV2 %2 has no insert ID",
 791                         path, me->name()) << endmsg;
 792                 return g_strdup(path);
 793         }
 794
 795         const std::string abs_path = Glib::build_filename(me->scratch_dir(), path);
 796         const std::string dirname  = Glib::path_get_dirname(abs_path);
 797         g_mkdir_with_parents(dirname.c_str(), 0744);
 798
 799         DEBUG_TRACE(DEBUG::LV2, string_compose("new file path %1 => %2\n",
 800                                                path, abs_path));
 801
 802         std::cerr << "MAKE PATH " << path
 803                   << " => " << g_strndup(abs_path.c_str(), abs_path.length())
 804                   << std::endl;
 805         return g_strndup(abs_path.c_str(), abs_path.length());
 806 }
 807
 808 static void
 809 remove_directory(const std::string& path)
 810 {
 811         if (!Glib::file_test(path, Glib::FILE_TEST_IS_DIR)) {
 812                 warning << string_compose("\"%1\" is not a directory", path) << endmsg;
 813                 return;
 814         }
 815
 816         Glib::RefPtr<Gio::File>           dir = Gio::File::create_for_path(path);
 817         Glib::RefPtr<Gio::FileEnumerator> e   = dir->enumerate_children();
 818         Glib::RefPtr<Gio::FileInfo>       fi;
 819         while ((fi = e->next_file())) {
 820                 if (fi->get_type() == Gio::FILE_TYPE_DIRECTORY) {
 821                         remove_directory(fi->get_name());
 822                 } else {
 823                         dir->get_child(fi->get_name())->remove();
 824                 }
 825         }
 826         dir->remove();
 827 }
 828
 829 void
 830 LV2Plugin::add_state(XMLNode* root) const
 831 {
 832         assert(_insert_id != PBD::ID("0"));
 833
 834         XMLNode*    child;
 835         char        buf[16];
 836         LocaleGuard lg(X_("POSIX"));
 837
 838         for (uint32_t i = 0; i < parameter_count(); ++i) {
 839                 if (parameter_is_input(i) && parameter_is_control(i)) {
 840                         child = new XMLNode("Port");
 841                         child->add_property("symbol", port_symbol(i));
 842                         snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
 843                         child->add_property("value", string(buf));
 844                         root->add_child_nocopy(*child);
 845                 }
 846         }
 847
 848         if (_has_state_interface) {
 849                 cout << "LV2 " << name() << " has state interface" << endl;
 850                 // Provisionally increment state version and create directory
 851                 const std::string new_dir = state_dir(++_state_version);
 852                 g_mkdir_with_parents(new_dir.c_str(), 0744);
 853
 854                 cout << "NEW DIR: " << new_dir << endl;
 855
 856                 LilvState* state = lilv_state_new_from_instance(
 857                         _impl->plugin,
 858                         _impl->instance,
 859                         _uri_map.urid_map(),
 860                         scratch_dir().c_str(),
 861                         file_dir().c_str(),
 862                         _session.externals_dir().c_str(),
 863                         new_dir.c_str(),
 864                         NULL,
 865                         (void*)this,
 866                         0,
 867                         NULL);
 868
 869                 if (!_impl->state || !lilv_state_equals(state, _impl->state)) {
 870                         lilv_state_save(_world.world,
 871                                         _uri_map.urid_map(),
 872                                         _uri_map.urid_unmap(),
 873                                         state,
 874                                         NULL,
 875                                         new_dir.c_str(),
 876                                         "state.ttl");
 877
 878                         lilv_state_free(_impl->state);
 879                         _impl->state = state;
 880
 881                         cout << "Saved LV2 state to " << state_dir(_state_version) << endl;
 882                 } else {
 883                         // State is identical, decrement version and nuke directory
 884                         cout << "LV2 state identical, not saving" << endl;
 885                         lilv_state_free(state);
 886                         remove_directory(new_dir);
 887                         --_state_version;
 888                 }
 889
 890                 root->add_property("state-dir", string_compose("state%1", _state_version));
 891         } else {
 892                 cout << "LV2 " << name() << " has no state interface." << endl;
 893         }
 894 }
 895
 896 static inline const LilvNode*
 897 get_value(LilvWorld* world, const LilvNode* subject, const LilvNode* predicate)
 898 {
 899         LilvNodes* vs = lilv_world_find_nodes(world, subject, predicate, NULL);
 900         return vs ? lilv_nodes_get_first(vs) : NULL;
 901 }
 902
 903 void
 904 LV2Plugin::find_presets()
 905 {
 906         LilvNode* lv2_appliesTo = lilv_new_uri(_world.world, LV2_CORE__appliesTo);
 907         LilvNode* pset_Preset   = lilv_new_uri(_world.world, LV2_PRESETS__Preset);
 908         LilvNode* rdfs_label    = lilv_new_uri(_world.world, LILV_NS_RDFS "label");
 909
 910         LilvNodes* presets = lilv_plugin_get_related(_impl->plugin, pset_Preset);
 911         LILV_FOREACH(nodes, i, presets) {
 912                 const LilvNode* preset = lilv_nodes_get(presets, i);
 913                 lilv_world_load_resource(_world.world, preset);
 914                 const LilvNode* name = get_value(_world.world, preset, rdfs_label);
 915                 if (name) {
 916                         _presets.insert(std::make_pair(lilv_node_as_string(preset),
 917                                                        Plugin::PresetRecord(
 918                                                                lilv_node_as_string(preset),
 919                                                                lilv_node_as_string(name))));
 920                 } else {
 921                         warning << string_compose(
 922                             _("Plugin \"%1\% preset \"%2%\" is missing a label\n"),
 923                             lilv_node_as_string(lilv_plugin_get_uri(_impl->plugin)),
 924                             lilv_node_as_string(preset)) << endmsg;
 925                 }
 926         }
 927         lilv_nodes_free(presets);
 928
 929         lilv_node_free(rdfs_label);
 930         lilv_node_free(pset_Preset);
 931         lilv_node_free(lv2_appliesTo);
 932 }
 933
 934 bool
 935 LV2Plugin::load_preset(PresetRecord r)
 936 {
 937         std::map<std::string,uint32_t>::iterator it;
 938
 939         LilvNode* lv2_port   = lilv_new_uri(_world.world, LILV_NS_LV2 "port");
 940         LilvNode* lv2_symbol = lilv_new_uri(_world.world, LILV_NS_LV2 "symbol");
 941         LilvNode* preset     = lilv_new_uri(_world.world, r.uri.c_str());
 942         LilvNode* pset_value = lilv_new_uri(_world.world, LV2_PRESETS__value);
 943
 944         LilvNodes* ports = lilv_world_find_nodes(_world.world, preset, lv2_port, NULL);
 945         LILV_FOREACH(nodes, i, ports) {
 946                 const LilvNode* port   = lilv_nodes_get(ports, i);
 947                 const LilvNode* symbol = get_value(_world.world, port, lv2_symbol);
 948                 const LilvNode* value  = get_value(_world.world, port, pset_value);
 949                 if (value && lilv_node_is_float(value)) {
 950                         it = _port_indices.find(lilv_node_as_string(symbol));
 951                         if (it != _port_indices.end()) {
 952                                 set_parameter(it->second,lilv_node_as_float(value));
 953                         }
 954                 }
 955         }
 956         lilv_nodes_free(ports);
 957
 958         lilv_node_free(pset_value);
 959         lilv_node_free(preset);
 960         lilv_node_free(lv2_symbol);
 961         lilv_node_free(lv2_port);
 962
 963         Plugin::load_preset(r);
 964
 965         return true;
 966 }
 967
 968 const void*
 969 ARDOUR::lv2plugin_get_port_value(const char* port_symbol,
 970                                  void*       user_data,
 971                                  uint32_t*   size,
 972                                  uint32_t*   type)
 973 {
 974         // cerr << "get_port_value(" << port_symbol << ", ...) ... ";
 975         LV2Plugin *plugin = (LV2Plugin *) user_data;
 976
 977         uint32_t index = plugin->port_index(port_symbol);
 978         if (index != (uint32_t) -1) {
 979                 if (plugin->parameter_is_input(index) && plugin->parameter_is_control(index)) {
 980                         float *value;
 981                         *size = sizeof(float);
 982                         *type = plugin->_uri_map.uri_to_id(LV2_ATOM__Float);
 983                         value = &plugin->_shadow_data[index];
 984                         // cerr << "index="<< index << ",*size=" << *size << ",*type=" << *type << ",*value=" << *value << endl;
 985
 986                         return value;
 987                 }
 988                 // cerr << "port is not input control port! ";
 989         }
 990
 991         // cerr << "returning NULL!" << endl;
 992         *size = *type = 0;
 993         return NULL;
 994 }
 995
 996
 997 std::string
 998 LV2Plugin::do_save_preset(string name)
 999 {
1000         // cerr << "LV2Plugin::do_save_preset(" << name << ")" << endl;
1001
1002         string pset_uri = uri();
1003         pset_uri += "#";
1004         pset_uri += name;
1005
1006         string save_dir = Glib::build_filename(
1007                 Glib::get_home_dir(),
1008                 Glib::build_filename(".lv2", "presets")
1009         );
1010
1011         LilvState* state = lilv_state_new_from_instance(
1012                 _impl->plugin,
1013                 _impl->instance,
1014                 _uri_map.urid_map(),
1015                 scratch_dir().c_str(),                  // file_dir
1016                 NULL,                                   // copy_dir
1017                 NULL,                                   // link_dir
1018                 save_dir.c_str(),                       // save_dir
1019                 lv2plugin_get_port_value,               // get_value
1020                 (void*) this,                           // user_data
1021                 LV2_STATE_IS_POD|LV2_STATE_IS_PORTABLE, // flags
1022                 _features                               // features
1023         );
1024
1025         lilv_state_set_label(state, name.c_str());
1026         lilv_state_save(
1027                 _world.world,           // world
1028                 _uri_map.urid_map(),    // map
1029                 _uri_map.urid_unmap(),  // unmap
1030                 state,                  // state
1031                 pset_uri.c_str(),       // uri
1032                 save_dir.c_str(),       // dir
1033                 (name + ".ttl").c_str() // filename
1034         );
1035
1036         lilv_state_free(state);
1037         return pset_uri;
1038 }
1039
1040 void
1041 LV2Plugin::do_remove_preset(string name)
1042 {
1043         string preset_file = Glib::build_filename(
1044                 Glib::get_home_dir(),
1045                 Glib::build_filename(
1046                         Glib::build_filename(".lv2", "presets"),
1047                         name + ".ttl"
1048                 )
1049         );
1050         unlink(preset_file.c_str());
1051 }
1052
1053 bool
1054 LV2Plugin::has_editor() const
1055 {
1056         return _impl->ui != NULL;
1057 }
1058
1059 bool
1060 LV2Plugin::has_message_output() const
1061 {
1062         for (uint32_t i = 0; i < num_ports(); ++i) {
1063                 if ((_port_flags[i] & (PORT_MESSAGE|PORT_ATOM)) && _port_flags[i] & PORT_OUTPUT) {
1064                         return true;
1065                 }
1066         }
1067         return false;
1068 }
1069
1070 uint32_t
1071 LV2Plugin::atom_eventTransfer() const
1072 {
1073         return _event_transfer_type;
1074 }
1075
1076 void
1077 LV2Plugin::write_to(RingBuffer<uint8_t>* dest,
1078                     uint32_t             index,
1079                     uint32_t             protocol,
1080                     uint32_t             size,
1081                     const uint8_t*       body)
1082 {
1083         const uint32_t buf_size = sizeof(UIMessage) + size;
1084         uint8_t        buf[buf_size];
1085
1086         UIMessage* msg = (UIMessage*)buf;
1087         msg->index    = index;
1088         msg->protocol = protocol;
1089         msg->size     = size;
1090         memcpy(msg + 1, body, size);
1091
1092         if (dest->write(buf, buf_size) != buf_size) {
1093                 error << "Error writing to UI=>Plugin RingBuffer" << endmsg;
1094         }
1095 }
1096
1097 void
1098 LV2Plugin::write_from_ui(uint32_t       index,
1099                          uint32_t       protocol,
1100                          uint32_t       size,
1101                          const uint8_t* body)
1102 {
1103         if (!_from_ui) {
1104                 _from_ui = new RingBuffer<uint8_t>(4096);
1105         }
1106
1107         write_to(_from_ui, index, protocol, size, body);
1108 }
1109
1110 void
1111 LV2Plugin::write_to_ui(uint32_t       index,
1112                        uint32_t       protocol,
1113                        uint32_t       size,
1114                        const uint8_t* body)
1115 {
1116         write_to(_to_ui, index, protocol, size, body);
1117 }
1118
1119 void
1120 LV2Plugin::enable_ui_emmission()
1121 {
1122         if (!_to_ui) {
1123                 _to_ui = new RingBuffer<uint8_t>(4096);
1124         }
1125 }
1126
1127 void
1128 LV2Plugin::emit_to_ui(void* controller, UIMessageSink sink)
1129 {
1130         if (!_to_ui) {
1131                 return;
1132         }
1133
1134         uint32_t read_space = _to_ui->read_space();
1135         while (read_space > sizeof(UIMessage)) {
1136                 UIMessage msg;
1137                 if (_to_ui->read((uint8_t*)&msg, sizeof(msg)) != sizeof(msg)) {
1138                         error << "Error reading from Plugin=>UI RingBuffer" << endmsg;
1139                         break;
1140                 }
1141                 uint8_t body[msg.size];
1142                 if (_to_ui->read(body, msg.size) != msg.size) {
1143                         error << "Error reading from Plugin=>UI RingBuffer" << endmsg;
1144                         break;
1145                 }
1146
1147                 sink(controller, msg.index, msg.size, msg.protocol, body);
1148
1149                 read_space -= sizeof(msg) + msg.size;
1150         }
1151 }
1152
1153 int
1154 LV2Plugin::work(uint32_t size, const void* data)
1155 {
1156         return _impl->work_iface->work(
1157                 _impl->instance->lv2_handle, work_respond, this, size, data);
1158 }
1159
1160 int
1161 LV2Plugin::work_response(uint32_t size, const void* data)
1162 {
1163         return _impl->work_iface->work_response(
1164                 _impl->instance->lv2_handle, size, data);
1165 }
1166
1167 void
1168 LV2Plugin::set_insert_info(const PluginInsert* insert)
1169 {
1170         _insert_id = insert->id();
1171 }
1172
1173 int
1174 LV2Plugin::set_state(const XMLNode& node, int version)
1175 {
1176         XMLNodeList          nodes;
1177         const XMLProperty*   prop;
1178         XMLNodeConstIterator iter;
1179         XMLNode*             child;
1180         const char*          sym;
1181         const char*          value;
1182         uint32_t             port_id;
1183         LocaleGuard          lg(X_("POSIX"));
1184
1185         if (node.name() != state_node_name()) {
1186                 error << _("Bad node sent to LV2Plugin::set_state") << endmsg;
1187                 return -1;
1188         }
1189
1190         if (version < 3000) {
1191                 nodes = node.children("port");
1192         } else {
1193                 nodes = node.children("Port");
1194         }
1195
1196         for (iter = nodes.begin(); iter != nodes.end(); ++iter) {
1197
1198                 child = *iter;
1199
1200                 if ((prop = child->property("symbol")) != 0) {
1201                         sym = prop->value().c_str();
1202                 } else {
1203                         warning << _("LV2: port has no symbol, ignored") << endmsg;
1204                         continue;
1205                 }
1206
1207                 map<string, uint32_t>::iterator i = _port_indices.find(sym);
1208
1209                 if (i != _port_indices.end()) {
1210                         port_id = i->second;
1211                 } else {
1212                         warning << _("LV2: port has unknown index, ignored") << endmsg;
1213                         continue;
1214                 }
1215
1216                 if ((prop = child->property("value")) != 0) {
1217                         value = prop->value().c_str();
1218                 } else {
1219                         warning << _("LV2: port has no value, ignored") << endmsg;
1220                         continue;
1221                 }
1222
1223                 set_parameter(port_id, atof(value));
1224         }
1225
1226         _state_version = 0;
1227         if ((prop = node.property("state-dir")) != 0) {
1228                 if (sscanf(prop->value().c_str(), "state%u", &_state_version) != 1) {
1229                         error << string_compose(
1230                                 "LV2: failed to parse state version from \"%1\"",
1231                                 prop->value()) << endmsg;
1232                 }
1233
1234                 std::string state_file = Glib::build_filename(
1235                         plugin_dir(),
1236                         Glib::build_filename(prop->value(), "state.ttl"));
1237
1238                 cout << "Loading LV2 state from " << state_file << endl;
1239                 LilvState* state = lilv_state_new_from_file(
1240                         _world.world, _uri_map.urid_map(), NULL, state_file.c_str());
1241
1242                 lilv_state_restore(state, _impl->instance, NULL, NULL, 0, NULL);
1243         }
1244
1245         latency_compute_run();
1246
1247         return Plugin::set_state(node, version);
1248 }
1249
1250 int
1251 LV2Plugin::get_parameter_descriptor(uint32_t which, ParameterDescriptor& desc) const
1252 {
1253         const LilvPort* port = lilv_plugin_get_port_by_index(_impl->plugin, which);
1254
1255         LilvNode *def, *min, *max;
1256         lilv_port_get_range(_impl->plugin, port, &def, &min, &max);
1257
1258         desc.integer_step = lilv_port_has_property(_impl->plugin, port, _world.lv2_integer);
1259         desc.toggled      = lilv_port_has_property(_impl->plugin, port, _world.lv2_toggled);
1260         desc.logarithmic  = lilv_port_has_property(_impl->plugin, port, _world.ext_logarithmic);
1261         desc.sr_dependent = lilv_port_has_property(_impl->plugin, port, _world.lv2_sampleRate);
1262         desc.label        = lilv_node_as_string(lilv_port_get_name(_impl->plugin, port));
1263         desc.lower        = min ? lilv_node_as_float(min) : 0.0f;
1264         desc.upper        = max ? lilv_node_as_float(max) : 1.0f;
1265         if (desc.sr_dependent) {
1266                 desc.lower *= _session.frame_rate ();
1267                 desc.upper *= _session.frame_rate ();
1268         }
1269
1270         desc.min_unbound  = false; // TODO: LV2 extension required
1271         desc.max_unbound  = false; // TODO: LV2 extension required
1272
1273         if (desc.integer_step) {
1274                 desc.step      = 1.0;
1275                 desc.smallstep = 0.1;
1276                 desc.largestep = 10.0;
1277         } else {
1278                 const float delta = desc.upper - desc.lower;
1279                 desc.step      = delta / 1000.0f;
1280                 desc.smallstep = delta / 10000.0f;
1281                 desc.largestep = delta / 10.0f;
1282         }
1283
1284         desc.enumeration = lilv_port_has_property(_impl->plugin, port, _world.lv2_enumeration);
1285
1286         lilv_node_free(def);
1287         lilv_node_free(min);
1288         lilv_node_free(max);
1289
1290         return 0;
1291 }
1292
1293 string
1294 LV2Plugin::describe_parameter(Evoral::Parameter which)
1295 {
1296         if (( which.type() == PluginAutomation) && ( which.id() < parameter_count()) ) {
1297                 LilvNode* name = lilv_port_get_name(_impl->plugin,
1298                                                     lilv_plugin_get_port_by_index(_impl->plugin, which.id()));
1299                 string ret(lilv_node_as_string(name));
1300                 lilv_node_free(name);
1301                 return ret;
1302         } else {
1303                 return "??";
1304         }
1305 }
1306
1307 framecnt_t
1308 LV2Plugin::signal_latency() const
1309 {
1310         if (_latency_control_port) {
1311                 return (framecnt_t)floor(*_latency_control_port);
1312         } else {
1313                 return 0;
1314         }
1315 }
1316
1317 set<Evoral::Parameter>
1318 LV2Plugin::automatable() const
1319 {
1320         set<Evoral::Parameter> ret;
1321
1322         for (uint32_t i = 0; i < parameter_count(); ++i) {
1323                 if (parameter_is_input(i) && parameter_is_control(i)) {
1324                         ret.insert(ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
1325                 }
1326         }
1327
1328         return ret;
1329 }
1330
1331 void
1332 LV2Plugin::activate()
1333 {
1334         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 activate\n", name()));
1335
1336         if (!_was_activated) {
1337                 lilv_instance_activate(_impl->instance);
1338                 _was_activated = true;
1339         }
1340 }
1341
1342 void
1343 LV2Plugin::deactivate()
1344 {
1345         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 deactivate\n", name()));
1346
1347         if (_was_activated) {
1348                 lilv_instance_deactivate(_impl->instance);
1349                 _was_activated = false;
1350         }
1351 }
1352
1353 void
1354 LV2Plugin::cleanup()
1355 {
1356         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 cleanup\n", name()));
1357
1358         activate();
1359         deactivate();
1360         lilv_instance_free(_impl->instance);
1361         _impl->instance = NULL;
1362 }
1363
1364 void
1365 LV2Plugin::allocate_atom_event_buffers () {
1366         /* reserve local scratch buffers for ATOM event-queues */
1367         const LilvPlugin* p = _impl->plugin;
1368
1369         /* count non-MIDI atom event-ports
1370          * TODO: nicely ask drobilla to make a lilv_ call for that
1371          */
1372         int count_atom_out = 0;
1373         int count_atom_in = 0;
1374         for (uint32_t i = 0; i < lilv_plugin_get_num_ports(p); ++i) {
1375                 const LilvPort* port  = lilv_plugin_get_port_by_index(p, i);
1376                 if (lilv_port_is_a(p, port, _world.atom_AtomPort)) {
1377                         LilvNodes* buffer_types = lilv_port_get_value(
1378                                 p, port, _world.atom_bufferType);
1379                         LilvNodes* atom_supports = lilv_port_get_value(
1380                                 p, port, _world.atom_supports);
1381
1382                         if (!lilv_nodes_contains(buffer_types, _world.atom_Sequence)
1383                                         || !lilv_nodes_contains(atom_supports, _world.midi_MidiEvent)) {
1384                                 if (lilv_port_is_a(p, port, _world.lv2_InputPort)) {
1385                                         count_atom_in++;
1386                                 }
1387                                 if (lilv_port_is_a(p, port, _world.lv2_OutputPort)) {
1388                                         count_atom_out++;
1389                                 }
1390                         }
1391                         lilv_nodes_free(buffer_types);
1392                         lilv_nodes_free(atom_supports);
1393                 }
1394         }
1395
1396         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 need buffers for %2 atom-in and %3 atom-out event-ports\n",
1397                                 name(), count_atom_in, count_atom_out));
1398
1399         const int total_atom_buffers = (count_atom_in + count_atom_out);
1400         if (_atom_ev_buffers || total_atom_buffers == 0) {
1401                 return;
1402         }
1403
1404         DEBUG_TRACE(DEBUG::LV2, string_compose("allocate %1 atom_ev_buffers\n", total_atom_buffers));
1405         _atom_ev_buffers = (LV2_Evbuf**) malloc((total_atom_buffers + 1) * sizeof(LV2_Evbuf*));
1406         for (int i = 0; i < total_atom_buffers; ++i ) {
1407                 _atom_ev_buffers[i] = lv2_evbuf_new(32768, LV2_EVBUF_ATOM,
1408                                 LV2Plugin::_chunk_type, LV2Plugin::_sequence_type);
1409         }
1410         _atom_ev_buffers[total_atom_buffers] = 0;
1411         return;
1412 }
1413
1414 int
1415 LV2Plugin::connect_and_run(BufferSet& bufs,
1416         ChanMapping in_map, ChanMapping out_map,
1417         pframes_t nframes, framecnt_t offset)
1418 {
1419         DEBUG_TRACE(DEBUG::LV2, string_compose("%1 run %2 offset %3\n", name(), nframes, offset));
1420         Plugin::connect_and_run(bufs, in_map, out_map, nframes, offset);
1421
1422         cycles_t then = get_cycles();
1423
1424         if (_freewheel_control_port) {
1425                 *_freewheel_control_port = _session.engine().freewheeling ();
1426         }
1427
1428         if (_bpm_control_port) {
1429                 TempoMap& tmap (_session.tempo_map ());
1430                 Tempo tempo = tmap.tempo_at (_session.transport_frame () + offset);
1431                 *_bpm_control_port = tempo.beats_per_minute ();
1432         }
1433
1434         ChanCount bufs_count;
1435         bufs_count.set(DataType::AUDIO, 1);
1436         bufs_count.set(DataType::MIDI, 1);
1437         BufferSet& silent_bufs  = _session.get_silent_buffers(bufs_count);
1438         BufferSet& scratch_bufs = _session.get_scratch_buffers(bufs_count);
1439         uint32_t const num_ports = parameter_count();
1440
1441         uint32_t audio_in_index  = 0;
1442         uint32_t audio_out_index = 0;
1443         uint32_t midi_in_index   = 0;
1444         uint32_t midi_out_index  = 0;
1445         uint32_t atom_port_index = 0;
1446         bool valid;
1447         for (uint32_t port_index = 0; port_index < num_ports; ++port_index) {
1448                 void*     buf   = NULL;
1449                 uint32_t  index = 0;
1450                 PortFlags flags = _port_flags[port_index];
1451                 if (flags & PORT_AUDIO) {
1452                         if (flags & PORT_INPUT) {
1453                                 index = in_map.get(DataType::AUDIO, audio_in_index++, &valid);
1454                                 buf = (valid)
1455                                         ? bufs.get_audio(index).data(offset)
1456                                         : silent_bufs.get_audio(0).data(offset);
1457                         } else {
1458                                 index = out_map.get(DataType::AUDIO, audio_out_index++, &valid);
1459                                 buf = (valid)
1460                                         ? bufs.get_audio(index).data(offset)
1461                                         : scratch_bufs.get_audio(0).data(offset);
1462                         }
1463                 } else if (flags & (PORT_EVENT|PORT_MESSAGE)) {
1464                         /* FIXME: The checks here for bufs.count().n_midi() > index shouldn't
1465                            be necessary, but the mapping is illegal in some cases.  Ideally
1466                            that should be fixed, but this is easier...
1467                         */
1468                         if (flags & PORT_INPUT) {
1469                                 index = in_map.get(DataType::MIDI, midi_in_index++, &valid);
1470                                 _ev_buffers[port_index] = (valid && bufs.count().n_midi() > index)
1471                                         ? bufs.get_lv2_midi(true, index, flags & PORT_EVENT)
1472                                         : silent_bufs.get_lv2_midi(true, 0, flags & PORT_EVENT);
1473                                 buf = lv2_evbuf_get_buffer(_ev_buffers[port_index]);
1474                         } else {
1475                                 index = out_map.get(DataType::MIDI, midi_out_index++, &valid);
1476                                 _ev_buffers[port_index] = (valid && bufs.count().n_midi() > index)
1477                                         ? bufs.get_lv2_midi(false, index, flags & PORT_EVENT)
1478                                         : scratch_bufs.get_lv2_midi(false, 0, flags & PORT_EVENT);
1479                                 buf = lv2_evbuf_get_buffer(_ev_buffers[port_index]);
1480                         }
1481                 } else if (flags & (PORT_ATOM)) {
1482                         assert(_atom_ev_buffers && _atom_ev_buffers[atom_port_index]);
1483                         if (flags & PORT_INPUT) {
1484                                 lv2_evbuf_reset(_atom_ev_buffers[atom_port_index], true);
1485                                 _ev_buffers[port_index] = _atom_ev_buffers[atom_port_index++];
1486                         } else {
1487                                 lv2_evbuf_reset(_atom_ev_buffers[atom_port_index], false);
1488                                 _ev_buffers[port_index] = _atom_ev_buffers[atom_port_index++];
1489                         }
1490                         buf = lv2_evbuf_get_buffer(_ev_buffers[port_index]);
1491                         assert(buf);
1492                 } else {
1493                         continue;  // Control port, leave buffer alone
1494                 }
1495                 lilv_instance_connect_port(_impl->instance, port_index, buf);
1496         }
1497
1498         // Read messages from UI and push into appropriate buffers
1499         if (_from_ui) {
1500                 uint32_t read_space = _from_ui->read_space();
1501                 while (read_space > sizeof(UIMessage)) {
1502                         UIMessage msg;
1503                         if (_from_ui->read((uint8_t*)&msg, sizeof(msg)) != sizeof(msg)) {
1504                                 error << "Error reading from UI=>Plugin RingBuffer" << endmsg;
1505                                 break;
1506                         }
1507                         uint8_t body[msg.size];
1508                         if (_from_ui->read(body, msg.size) != msg.size) {
1509                                 error << "Error reading from UI=>Plugin RingBuffer" << endmsg;
1510                                 break;
1511                         }
1512                         if (msg.protocol == _event_transfer_type) {
1513                                 LV2_Evbuf*            buf  = _ev_buffers[msg.index];
1514                                 LV2_Evbuf_Iterator    i    = lv2_evbuf_end(buf);
1515                                 const LV2_Atom* const atom = (const LV2_Atom*)body;
1516                                 if (!lv2_evbuf_write(&i, nframes, 0, atom->type, atom->size,
1517                                                 (const uint8_t*)(atom + 1))) {
1518                                         cerr << "LV2: failed to write data to event buffer\n";
1519                                 }
1520                         } else {
1521                                 error << "Received unknown message type from UI" << endmsg;
1522                         }
1523                         read_space -= sizeof(UIMessage) + msg.size;
1524                 }
1525         }
1526
1527         run(nframes);
1528
1529         midi_out_index = 0;
1530         for (uint32_t port_index = 0; port_index < num_ports; ++port_index) {
1531                 PortFlags flags = _port_flags[port_index];
1532
1533                 // Flush MIDI (write back to Ardour MIDI buffers)
1534                 if ((flags & PORT_OUTPUT) && (flags & (PORT_EVENT|PORT_MESSAGE))) {
1535                         const uint32_t buf_index = out_map.get(
1536                                 DataType::MIDI, midi_out_index++, &valid);
1537                         if (valid) {
1538                                 bufs.flush_lv2_midi(true, buf_index);
1539                         }
1540                 }
1541
1542                 // Write messages to UI
1543                 if (_to_ui && (flags & PORT_OUTPUT) && (flags & (PORT_MESSAGE|PORT_ATOM))) {
1544                         LV2_Evbuf* buf = _ev_buffers[port_index];
1545                         for (LV2_Evbuf_Iterator i = lv2_evbuf_begin(buf);
1546                              lv2_evbuf_is_valid(i);
1547                              i = lv2_evbuf_next(i)) {
1548                                 uint32_t frames, subframes, type, size;
1549                                 uint8_t* data;
1550                                 lv2_evbuf_get(i, &frames, &subframes, &type, &size, &data);
1551                                 write_to_ui(port_index, _event_transfer_type,
1552                                             size + sizeof(LV2_Atom),
1553                                             data - sizeof(LV2_Atom));
1554                         }
1555                 }
1556         }
1557
1558         cycles_t now = get_cycles();
1559         set_cycles((uint32_t)(now - then));
1560
1561         return 0;
1562 }
1563
1564 bool
1565 LV2Plugin::parameter_is_control(uint32_t param) const
1566 {
1567         assert(param < _port_flags.size());
1568         return _port_flags[param] & PORT_CONTROL;
1569 }
1570
1571 bool
1572 LV2Plugin::parameter_is_audio(uint32_t param) const
1573 {
1574         assert(param < _port_flags.size());
1575         return _port_flags[param] & PORT_AUDIO;
1576 }
1577
1578 bool
1579 LV2Plugin::parameter_is_event(uint32_t param) const
1580 {
1581         assert(param < _port_flags.size());
1582         return _port_flags[param] & PORT_EVENT;
1583 }
1584
1585 bool
1586 LV2Plugin::parameter_is_output(uint32_t param) const
1587 {
1588         assert(param < _port_flags.size());
1589         return _port_flags[param] & PORT_OUTPUT;
1590 }
1591
1592 bool
1593 LV2Plugin::parameter_is_input(uint32_t param) const
1594 {
1595         assert(param < _port_flags.size());
1596         return _port_flags[param] & PORT_INPUT;
1597 }
1598
1599 void
1600 LV2Plugin::print_parameter(uint32_t param, char* buf, uint32_t len) const
1601 {
1602         if (buf && len) {
1603                 if (param < parameter_count()) {
1604                         snprintf(buf, len, "%.3f", get_parameter(param));
1605                 } else {
1606                         strcat(buf, "0");
1607                 }
1608         }
1609 }
1610
1611 boost::shared_ptr<Plugin::ScalePoints>
1612 LV2Plugin::get_scale_points(uint32_t port_index) const
1613 {
1614         const LilvPort*  port   = lilv_plugin_get_port_by_index(_impl->plugin, port_index);
1615         LilvScalePoints* points = lilv_port_get_scale_points(_impl->plugin, port);
1616
1617         boost::shared_ptr<Plugin::ScalePoints> ret;
1618         if (!points) {
1619                 return ret;
1620         }
1621
1622         ret = boost::shared_ptr<Plugin::ScalePoints>(new ScalePoints());
1623
1624         LILV_FOREACH(scale_points, i, points) {
1625                 const LilvScalePoint* p     = lilv_scale_points_get(points, i);
1626                 const LilvNode*       label = lilv_scale_point_get_label(p);
1627                 const LilvNode*       value = lilv_scale_point_get_value(p);
1628                 if (label && (lilv_node_is_float(value) || lilv_node_is_int(value))) {
1629                         ret->insert(make_pair(lilv_node_as_string(label),
1630                                               lilv_node_as_float(value)));
1631                 }
1632         }
1633
1634         lilv_scale_points_free(points);
1635         return ret;
1636 }
1637
1638 void
1639 LV2Plugin::run(pframes_t nframes)
1640 {
1641         uint32_t const N = parameter_count();
1642         for (uint32_t i = 0; i < N; ++i) {
1643                 if (parameter_is_control(i) && parameter_is_input(i)) {
1644                         _control_data[i] = _shadow_data[i];
1645                 }
1646         }
1647
1648         lilv_instance_run(_impl->instance, nframes);
1649
1650         if (_impl->work_iface) {
1651                 _worker->emit_responses();
1652                 if (_impl->work_iface->end_run) {
1653                         _impl->work_iface->end_run(_impl->instance->lv2_handle);
1654                 }
1655         }
1656 }
1657
1658 void
1659 LV2Plugin::latency_compute_run()
1660 {
1661         if (!_latency_control_port) {
1662                 return;
1663         }
1664
1665         // Run the plugin so that it can set its latency parameter
1666
1667         activate();
1668
1669         uint32_t port_index = 0;
1670         uint32_t in_index   = 0;
1671         uint32_t out_index  = 0;
1672
1673         const framecnt_t bufsize = 1024;
1674         float            buffer[bufsize];
1675
1676         memset(buffer, 0, sizeof(float) * bufsize);
1677
1678         // FIXME: Ensure plugins can handle in-place processing
1679
1680         port_index = 0;
1681
1682         while (port_index < parameter_count()) {
1683                 if (parameter_is_audio(port_index)) {
1684                         if (parameter_is_input(port_index)) {
1685                                 lilv_instance_connect_port(_impl->instance, port_index, buffer);
1686                                 in_index++;
1687                         } else if (parameter_is_output(port_index)) {
1688                                 lilv_instance_connect_port(_impl->instance, port_index, buffer);
1689                                 out_index++;
1690                         }
1691                 }
1692                 port_index++;
1693         }
1694
1695         run(bufsize);
1696         deactivate();
1697 }
1698
1699 LilvPort*
1700 LV2Plugin::Impl::designated_input (const char* uri, void** bufptrs[], void** bufptr)
1701 {
1702         LilvPort* port        = NULL;
1703         LilvNode* designation = lilv_new_uri(_world.world, uri);
1704         port = lilv_plugin_get_port_by_designation(
1705                 plugin, _world.lv2_InputPort, designation);
1706         lilv_node_free(designation);
1707         if (port) {
1708                 bufptrs[lilv_port_get_index(plugin, port)] = bufptr;
1709         }
1710         return port;
1711 }
1712
1713 LV2World::LV2World()
1714         : world(lilv_world_new())
1715 {
1716         lilv_world_load_all(world);
1717         atom_AtomPort      = lilv_new_uri(world, LV2_ATOM__AtomPort);
1718         atom_Chunk         = lilv_new_uri(world, LV2_ATOM__Chunk);
1719         atom_Sequence      = lilv_new_uri(world, LV2_ATOM__Sequence);
1720         atom_bufferType    = lilv_new_uri(world, LV2_ATOM__bufferType);
1721         atom_supports      = lilv_new_uri(world, LV2_ATOM__supports);
1722         atom_eventTransfer = lilv_new_uri(world, LV2_ATOM__eventTransfer);
1723         ev_EventPort       = lilv_new_uri(world, LILV_URI_EVENT_PORT);
1724         ext_logarithmic    = lilv_new_uri(world, LV2_PORT_PROPS__logarithmic);
1725         lv2_AudioPort      = lilv_new_uri(world, LILV_URI_AUDIO_PORT);
1726         lv2_ControlPort    = lilv_new_uri(world, LILV_URI_CONTROL_PORT);
1727         lv2_InputPort      = lilv_new_uri(world, LILV_URI_INPUT_PORT);
1728         lv2_OutputPort     = lilv_new_uri(world, LILV_URI_OUTPUT_PORT);
1729         lv2_inPlaceBroken  = lilv_new_uri(world, LV2_CORE__inPlaceBroken);
1730         lv2_integer        = lilv_new_uri(world, LV2_CORE__integer);
1731         lv2_sampleRate     = lilv_new_uri(world, LV2_CORE__sampleRate);
1732         lv2_toggled        = lilv_new_uri(world, LV2_CORE__toggled);
1733         lv2_enumeration    = lilv_new_uri(world, LV2_CORE__enumeration);
1734         midi_MidiEvent     = lilv_new_uri(world, LILV_URI_MIDI_EVENT);
1735         rdfs_comment       = lilv_new_uri(world, LILV_NS_RDFS "comment");
1736         ui_GtkUI           = lilv_new_uri(world, LV2_UI__GtkUI);
1737         ui_external        = lilv_new_uri(world, "http://lv2plug.in/ns/extensions/ui#external");
1738 }
1739
1740 LV2World::~LV2World()
1741 {
1742         lilv_node_free(ui_external);
1743         lilv_node_free(ui_GtkUI);
1744         lilv_node_free(midi_MidiEvent);
1745         lilv_node_free(lv2_toggled);
1746         lilv_node_free(lv2_sampleRate);
1747         lilv_node_free(lv2_integer);
1748         lilv_node_free(lv2_inPlaceBroken);
1749         lilv_node_free(lv2_OutputPort);
1750         lilv_node_free(lv2_InputPort);
1751         lilv_node_free(lv2_ControlPort);
1752         lilv_node_free(lv2_AudioPort);
1753         lilv_node_free(ext_logarithmic);
1754         lilv_node_free(ev_EventPort);
1755         lilv_node_free(atom_eventTransfer);
1756         lilv_node_free(atom_bufferType);
1757         lilv_node_free(atom_Sequence);
1758         lilv_node_free(atom_Chunk);
1759         lilv_node_free(atom_AtomPort);
1760 }
1761
1762 LV2PluginInfo::LV2PluginInfo (const void* c_plugin)
1763         : _c_plugin(c_plugin)
1764 {
1765         type = ARDOUR::LV2;
1766 }
1767
1768 LV2PluginInfo::~LV2PluginInfo()
1769 {}
1770
1771 PluginPtr
1772 LV2PluginInfo::load(Session& session)
1773 {
1774         try {
1775                 PluginPtr plugin;
1776
1777                 plugin.reset(new LV2Plugin(session.engine(), session,
1778                                            (const LilvPlugin*)_c_plugin,
1779                                            session.frame_rate()));
1780
1781                 plugin->set_info(PluginInfoPtr(new LV2PluginInfo(*this)));
1782                 return plugin;
1783         } catch (failed_constructor& err) {
1784                 return PluginPtr((Plugin*)0);
1785         }
1786
1787         return PluginPtr();
1788 }
1789
1790 PluginInfoList*
1791 LV2PluginInfo::discover()
1792 {
1793         PluginInfoList*    plugs   = new PluginInfoList;
1794         const LilvPlugins* plugins = lilv_world_get_all_plugins(_world.world);
1795
1796         info << "LV2: Discovering " << lilv_plugins_size(plugins) << " plugins" << endmsg;
1797
1798         LILV_FOREACH(plugins, i, plugins) {
1799                 const LilvPlugin* p = lilv_plugins_get(plugins, i);
1800                 LV2PluginInfoPtr  info(new LV2PluginInfo((const void*)p));
1801
1802                 LilvNode* name = lilv_plugin_get_name(p);
1803                 if (!name) {
1804                         cerr << "LV2: invalid plugin\n";
1805                         continue;
1806                 }
1807
1808                 info->type = LV2;
1809
1810                 info->name = string(lilv_node_as_string(name));
1811                 lilv_node_free(name);
1812
1813                 const LilvPluginClass* pclass = lilv_plugin_get_class(p);
1814                 const LilvNode*        label  = lilv_plugin_class_get_label(pclass);
1815                 info->category = lilv_node_as_string(label);
1816
1817                 LilvNode* author_name = lilv_plugin_get_author_name(p);
1818                 info->creator = author_name ? string(lilv_node_as_string(author_name)) : "Unknown";
1819                 lilv_node_free(author_name);
1820
1821                 info->path = "/NOPATH"; // Meaningless for LV2
1822
1823                 /* count atom-event-ports that feature
1824                  * atom:supports <http://lv2plug.in/ns/ext/midi#MidiEvent>
1825                  *
1826                  * TODO: nicely ask drobilla to make a lilv_ call for that
1827                  */
1828                 int count_midi_out = 0;
1829                 int count_midi_in = 0;
1830                 for (uint32_t i = 0; i < lilv_plugin_get_num_ports(p); ++i) {
1831                         const LilvPort* port  = lilv_plugin_get_port_by_index(p, i);
1832                         if (lilv_port_is_a(p, port, _world.atom_AtomPort)) {
1833                                 LilvNodes* buffer_types = lilv_port_get_value(
1834                                         p, port, _world.atom_bufferType);
1835                                 LilvNodes* atom_supports = lilv_port_get_value(
1836                                         p, port, _world.atom_supports);
1837
1838                                 if (lilv_nodes_contains(buffer_types, _world.atom_Sequence)
1839                                                 && lilv_nodes_contains(atom_supports, _world.midi_MidiEvent)) {
1840                                         if (lilv_port_is_a(p, port, _world.lv2_InputPort)) {
1841                                                 count_midi_in++;
1842                                         }
1843                                         if (lilv_port_is_a(p, port, _world.lv2_OutputPort)) {
1844                                                 count_midi_out++;
1845                                         }
1846                                 }
1847                                 lilv_nodes_free(buffer_types);
1848                                 lilv_nodes_free(atom_supports);
1849                         }
1850                 }
1851
1852                 info->n_inputs.set_audio(
1853                         lilv_plugin_get_num_ports_of_class(
1854                                 p, _world.lv2_InputPort, _world.lv2_AudioPort, NULL));
1855                 info->n_inputs.set_midi(
1856                         lilv_plugin_get_num_ports_of_class(
1857                                 p, _world.lv2_InputPort, _world.ev_EventPort, NULL)
1858                         + count_midi_in);
1859
1860                 info->n_outputs.set_audio(
1861                         lilv_plugin_get_num_ports_of_class(
1862                                 p, _world.lv2_OutputPort, _world.lv2_AudioPort, NULL));
1863                 info->n_outputs.set_midi(
1864                         lilv_plugin_get_num_ports_of_class(
1865                                 p, _world.lv2_OutputPort, _world.ev_EventPort, NULL)
1866                         + count_midi_out);
1867
1868                 info->unique_id = lilv_node_as_uri(lilv_plugin_get_uri(p));
1869                 info->index     = 0; // Meaningless for LV2
1870
1871                 plugs->push_back(info);
1872         }
1873
1874         return plugs;
1875 }