libs/ardour/vst_plugin.cc

   1 /*
   2     Copyright (C) 2004 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <algorithm>
  21 #include <vector>
  22 #include <string>
  23 #include <cctype>
  24
  25 #include <cstdlib>
  26 #include <cstdio> // so libraptor doesn't complain
  27 #include <cmath>
  28 #include <dirent.h>
  29 #include <cstring> // for memmove
  30 #include <sys/stat.h>
  31 #include <cerrno>
  32
  33 #include <glibmm/miscutils.h>
  34
  35 #include <lrdf.h>
  36 #include <fst.h>
  37
  38 #include "pbd/compose.h"
  39 #include "pbd/error.h"
  40 #include "pbd/pathscanner.h"
  41 #include "pbd/xml++.h"
  42
  43 #include <fst.h>
  44
  45 #include "ardour/session.h"
  46 #include "ardour/audioengine.h"
  47 #include "ardour/filesystem_paths.h"
  48 #include "ardour/vst_plugin.h"
  49 #include "ardour/buffer_set.h"
  50 #include "ardour/audio_buffer.h"
  51 #include "ardour/midi_buffer.h"
  52
  53 #include "pbd/stl_delete.h"
  54
  55 #include "i18n.h"
  56 #include <locale.h>
  57
  58 using namespace std;
  59 using namespace ARDOUR;
  60 using namespace PBD;
  61 using std::min;
  62 using std::max;
  63
  64 VSTPlugin::VSTPlugin (AudioEngine& e, Session& session, FSTHandle* h)
  65         : Plugin (e, session)
  66 {
  67         handle = h;
  68
  69         if ((_fst = fst_instantiate (handle, Session::vst_callback, this)) == 0) {
  70                 throw failed_constructor();
  71         }
  72
  73         _plugin = _fst->plugin;
  74         _plugin->user = this;
  75
  76         /* set rate and blocksize */
  77
  78         _plugin->dispatcher (_plugin, effSetSampleRate, 0, 0, NULL,
  79                              (float) session.frame_rate());
  80         _plugin->dispatcher (_plugin, effSetBlockSize, 0,
  81                              session.get_block_size(), NULL, 0.0f);
  82
  83         /* set program to zero */
  84
  85         _plugin->dispatcher (_plugin, effSetProgram, 0, 0, NULL, 0.0f);
  86
  87         // Plugin::setup_controls ();
  88 }
  89
  90 VSTPlugin::VSTPlugin (const VSTPlugin &other)
  91         : Plugin (other)
  92 {
  93         handle = other.handle;
  94
  95         if ((_fst = fst_instantiate (handle, Session::vst_callback, this)) == 0) {
  96                 throw failed_constructor();
  97         }
  98         _plugin = _fst->plugin;
  99
 100         // Plugin::setup_controls ();
 101 }
 102
 103 VSTPlugin::~VSTPlugin ()
 104 {
 105         deactivate ();
 106         fst_close (_fst);
 107 }
 108
 109 int
 110 VSTPlugin::set_block_size (pframes_t nframes)
 111 {
 112         deactivate ();
 113         _plugin->dispatcher (_plugin, effSetBlockSize, 0, nframes, NULL, 0.0f);
 114         activate ();
 115         return 0;
 116 }
 117
 118 float
 119 VSTPlugin::default_value (uint32_t port)
 120 {
 121         return 0;
 122 }
 123
 124 void
 125 VSTPlugin::set_parameter (uint32_t which, float val)
 126 {
 127         _plugin->setParameter (_plugin, which, val);
 128
 129         if (_fst->want_program == -1 && _fst->want_chunk == 0) {
 130                 /* Heinous hack: Plugin::set_parameter below updates the `modified' status of the
 131                    current preset, but if _fst->want_program is not -1 then there is a preset
 132                    setup pending or in progress, which we don't want any `modified' updates
 133                    to happen for.  So we only do this if _fst->want_program is -1.
 134                 */
 135                 Plugin::set_parameter (which, val);
 136         }
 137 }
 138
 139 float
 140 VSTPlugin::get_parameter (uint32_t which) const
 141 {
 142         return _plugin->getParameter (_plugin, which);
 143
 144 }
 145
 146 uint32_t
 147 VSTPlugin::nth_parameter (uint32_t n, bool& ok) const
 148 {
 149         ok = true;
 150         return n;
 151 }
 152
 153 /** Get VST chunk as base64-encoded data.
 154  *  @param single true for single program, false for all programs.
 155  *  @return 0-terminated base64-encoded data; must be passed to g_free () by caller.
 156  */
 157 gchar *
 158 VSTPlugin::get_chunk (bool single) const
 159 {
 160         guchar* data;
 161         int32_t data_size = _plugin->dispatcher (_plugin, 23 /* effGetChunk */, single ? 1 : 0, 0, &data, 0);
 162         if (data_size == 0) {
 163                 return 0;
 164         }
 165
 166         return g_base64_encode (data, data_size);
 167 }
 168
 169 /** Set VST chunk from base64-encoded data.
 170  *  @param 0-terminated base64-encoded data.
 171  *  @param single true for single program, false for all programs.
 172  *  @return 0 on success, non-0 on failure
 173  */
 174 int
 175 VSTPlugin::set_chunk (gchar const * data, bool single)
 176 {
 177         gsize size = 0;
 178         guchar* raw_data = g_base64_decode (data, &size);
 179         int const r = _plugin->dispatcher (_plugin, 24 /* effSetChunk */, single ? 1 : 0, size, raw_data, 0);
 180         g_free (raw_data);
 181         return r;
 182 }
 183
 184 void
 185 VSTPlugin::add_state (XMLNode* root) const
 186 {
 187         LocaleGuard lg (X_("POSIX"));
 188
 189         if (_fst->current_program != -1) {
 190                 char buf[32];
 191                 snprintf (buf, sizeof (buf), "%d", _fst->current_program);
 192                 root->add_property ("current-program", buf);
 193         }
 194
 195         if (_plugin->flags & 32 /* effFlagsProgramsChunks */) {
 196
 197                 gchar* data = get_chunk (false);
 198                 if (data == 0) {
 199                         return;
 200                 }
 201
 202                 /* store information */
 203
 204                 XMLNode* chunk_node = new XMLNode (X_("chunk"));
 205
 206                 chunk_node->add_content (data);
 207                 g_free (data);
 208
 209                 root->add_child_nocopy (*chunk_node);
 210
 211         } else {
 212
 213                 XMLNode* parameters = new XMLNode ("parameters");
 214
 215                 for (int32_t n = 0; n < _plugin->numParams; ++n) {
 216                         char index[64];
 217                         char val[32];
 218                         snprintf (index, sizeof (index), "param_%d", n);
 219                         snprintf (val, sizeof (val), "%.12g", _plugin->getParameter (_plugin, n));
 220                         parameters->add_property (index, val);
 221                 }
 222
 223                 root->add_child_nocopy (*parameters);
 224         }
 225 }
 226
 227 int
 228 VSTPlugin::set_state (const XMLNode& node, int version)
 229 {
 230         LocaleGuard lg (X_("POSIX"));
 231
 232         if (node.name() != state_node_name()) {
 233                 error << _("Bad node sent to VSTPlugin::set_state") << endmsg;
 234                 return 0;
 235         }
 236
 237         const XMLProperty* prop;
 238
 239         if ((prop = node.property ("current-program")) != 0) {
 240                 _fst->want_program = atoi (prop->value().c_str());
 241         }
 242
 243         XMLNode* child;
 244         int ret = -1;
 245
 246         if ((child = find_named_node (node, X_("chunk"))) != 0) {
 247
 248                 XMLPropertyList::const_iterator i;
 249                 XMLNodeList::const_iterator n;
 250                 int ret = -1;
 251
 252                 for (n = child->children ().begin (); n != child->children ().end (); ++n) {
 253                         if ((*n)->is_content ()) {
 254                                 /* XXX: this may be dubious for the same reasons that we delay
 255                                    execution of load_preset.
 256                                 */
 257                                 ret = set_chunk ((*n)->content().c_str(), false);
 258                         }
 259                 }
 260
 261         } else if ((child = find_named_node (node, X_("parameters"))) != 0) {
 262
 263                 XMLPropertyList::const_iterator i;
 264
 265                 for (i = child->properties().begin(); i != child->properties().end(); ++i) {
 266                         int32_t param;
 267                         float val;
 268
 269                         sscanf ((*i)->name().c_str(), "param_%d", &param);
 270                         sscanf ((*i)->value().c_str(), "%f", &val);
 271
 272                         _plugin->setParameter (_plugin, param, val);
 273                 }
 274
 275                 /* program number is not knowable */
 276
 277                 _fst->current_program = -1;
 278
 279                 ret = 0;
 280
 281         }
 282
 283         Plugin::set_state (node, version);
 284         return ret;
 285 }
 286
 287 int
 288 VSTPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const
 289 {
 290         VstParameterProperties prop;
 291
 292         desc.min_unbound = false;
 293         desc.max_unbound = false;
 294         prop.flags = 0;
 295
 296         if (_plugin->dispatcher (_plugin, effGetParameterProperties, which, 0, &prop, 0)) {
 297
 298 #ifdef VESTIGE_COMPLETE
 299
 300                 /* i have yet to find or hear of a VST plugin that uses this */
 301
 302                 if (prop.flags & kVstParameterUsesIntegerMinMax) {
 303                         desc.lower = prop.minInteger;
 304                         desc.upper = prop.maxInteger;
 305                 } else {
 306                         desc.lower = 0;
 307                         desc.upper = 1.0;
 308                 }
 309
 310                 if (prop.flags & kVstParameterUsesIntStep) {
 311
 312                         desc.step = prop.stepInteger;
 313                         desc.smallstep = prop.stepInteger;
 314                         desc.largestep = prop.stepInteger;
 315
 316                 } else if (prop.flags & kVstParameterUsesFloatStep) {
 317
 318                         desc.step = prop.stepFloat;
 319                         desc.smallstep = prop.smallStepFloat;
 320                         desc.largestep = prop.largeStepFloat;
 321
 322                 } else {
 323
 324                         float range = desc.upper - desc.lower;
 325
 326                         desc.step = range / 100.0f;
 327                         desc.smallstep = desc.step / 2.0f;
 328                         desc.largestep = desc.step * 10.0f;
 329                 }
 330
 331                 desc.toggled = prop.flags & kVstParameterIsSwitch;
 332                 desc.logarithmic = false;
 333                 desc.sr_dependent = false;
 334                 desc.label = prop.label;
 335 #endif
 336
 337         } else {
 338
 339                 /* old style */
 340
 341                 char label[64];
 342                 label[0] = '\0';
 343
 344                 _plugin->dispatcher (_plugin, effGetParamName, which, 0, label, 0);
 345
 346                 desc.label = label;
 347                 desc.integer_step = false;
 348                 desc.lower = 0.0f;
 349                 desc.upper = 1.0f;
 350                 desc.step = 0.01f;
 351                 desc.smallstep = 0.005f;
 352                 desc.largestep = 0.1f;
 353                 desc.toggled = false;
 354                 desc.logarithmic = false;
 355                 desc.sr_dependent = false;
 356         }
 357
 358         return 0;
 359 }
 360
 361 bool
 362 VSTPlugin::load_preset (PresetRecord r)
 363 {
 364         bool s;
 365
 366         if (r.user) {
 367                 s = load_user_preset (r);
 368         } else {
 369                 s = load_plugin_preset (r);
 370         }
 371
 372         if (s) {
 373                 Plugin::load_preset (r);
 374         }
 375
 376         return s;
 377 }
 378
 379 bool
 380 VSTPlugin::load_plugin_preset (PresetRecord r)
 381 {
 382         /* This is a plugin-provided preset.
 383            We can't dispatch directly here; too many plugins expects only one GUI thread.
 384         */
 385
 386         /* Extract the index of this preset from the URI */
 387         int id;
 388         int index;
 389         int const p = sscanf (r.uri.c_str(), "VST:%d:%d", &id, &index);
 390         assert (p == 2);
 391
 392         _fst->want_program = index;
 393         return true;
 394 }
 395
 396 bool
 397 VSTPlugin::load_user_preset (PresetRecord r)
 398 {
 399         /* This is a user preset; we load it, and this code also knows about the
 400            non-direct-dispatch thing.
 401         */
 402
 403         boost::shared_ptr<XMLTree> t (presets_tree ());
 404         if (t == 0) {
 405                 return false;
 406         }
 407
 408         XMLNode* root = t->root ();
 409
 410         for (XMLNodeList::const_iterator i = root->children().begin(); i != root->children().end(); ++i) {
 411
 412                 XMLProperty* uri = (*i)->property (X_("uri"));
 413                 XMLProperty* label = (*i)->property (X_("label"));
 414
 415                 assert (uri);
 416                 assert (label);
 417
 418                 if (label->value() != r.label) {
 419                         continue;
 420                 }
 421
 422                 if (_plugin->flags & 32 /* effFlagsProgramsChunks */) {
 423
 424                         /* Load a user preset chunk from our XML file and send it via a circuitous route to the plugin */
 425
 426                         if (_fst->wanted_chunk) {
 427                                 g_free (_fst->wanted_chunk);
 428                         }
 429
 430                         for (XMLNodeList::const_iterator j = (*i)->children().begin(); j != (*i)->children().end(); ++j) {
 431                                 if ((*j)->is_content ()) {
 432                                         /* we can't dispatch directly here; too many plugins expect only one GUI thread */
 433                                         gsize size = 0;
 434                                         guchar* raw_data = g_base64_decode ((*j)->content().c_str(), &size);
 435                                         _fst->wanted_chunk = raw_data;
 436                                         _fst->wanted_chunk_size = size;
 437                                         _fst->want_chunk = 1;
 438                                         return true;
 439                                 }
 440                         }
 441
 442                         return false;
 443
 444                 } else {
 445
 446                         for (XMLNodeList::const_iterator j = (*i)->children().begin(); j != (*i)->children().end(); ++j) {
 447                                 if ((*j)->name() == X_("Parameter")) {
 448
 449                                                 XMLProperty* index = (*j)->property (X_("index"));
 450                                                 XMLProperty* value = (*j)->property (X_("value"));
 451
 452                                                 assert (index);
 453                                                 assert (value);
 454
 455                                                 set_parameter (atoi (index->value().c_str()), atof (value->value().c_str ()));
 456                                 }
 457                         }
 458
 459                         return true;
 460                 }
 461         }
 462
 463         return false;
 464 }
 465
 466 string
 467 VSTPlugin::do_save_preset (string name)
 468 {
 469         boost::shared_ptr<XMLTree> t (presets_tree ());
 470         if (t == 0) {
 471                 return "";
 472         }
 473
 474         XMLNode* p = 0;
 475         /* XXX: use of _presets.size() + 1 for the unique ID here is dubious at best */
 476         string const uri = string_compose (X_("VST:%1:%2"), unique_id (), _presets.size() + 1);
 477
 478         if (_plugin->flags & 32 /* effFlagsProgramsChunks */) {
 479
 480                 p = new XMLNode (X_("ChunkPreset"));
 481                 p->add_property (X_("uri"), uri);
 482                 p->add_property (X_("label"), name);
 483                 gchar* data = get_chunk (true);
 484                 p->add_content (string (data));
 485                 g_free (data);
 486
 487         } else {
 488
 489                 p = new XMLNode (X_("Preset"));
 490                 p->add_property (X_("uri"), uri);
 491                 p->add_property (X_("label"), name);
 492
 493                 for (uint32_t i = 0; i < parameter_count(); ++i) {
 494                         if (parameter_is_input (i)) {
 495                                 XMLNode* c = new XMLNode (X_("Parameter"));
 496                                 c->add_property (X_("index"), string_compose ("%1", i));
 497                                 c->add_property (X_("value"), string_compose ("%1", get_parameter (i)));
 498                                 p->add_child_nocopy (*c);
 499                         }
 500                 }
 501
 502         }
 503
 504         t->root()->add_child_nocopy (*p);
 505
 506         sys::path f = ARDOUR::user_config_directory ();
 507         f /= "presets";
 508         f /= presets_file ();
 509
 510         t->write (f.to_string ());
 511         return uri;
 512 }
 513
 514 void
 515 VSTPlugin::do_remove_preset (string name)
 516 {
 517         boost::shared_ptr<XMLTree> t (presets_tree ());
 518         if (t == 0) {
 519                 return;
 520         }
 521
 522         t->root()->remove_nodes_and_delete (X_("label"), name);
 523
 524         sys::path f = ARDOUR::user_config_directory ();
 525         f /= "presets";
 526         f /= presets_file ();
 527
 528         t->write (f.to_string ());
 529 }
 530
 531 string
 532 VSTPlugin::describe_parameter (Evoral::Parameter param)
 533 {
 534         char name[64];
 535         _plugin->dispatcher (_plugin, effGetParamName, param.id(), 0, name, 0);
 536         return name;
 537 }
 538
 539 framecnt_t
 540 VSTPlugin::signal_latency () const
 541 {
 542         if (_user_latency) {
 543                 return _user_latency;
 544         }
 545
 546 #ifdef VESTIGE_HEADER
 547         return *((framecnt_t *) (((char *) &_plugin->flags) + 12)); /* initialDelay */
 548 #else
 549         return _plugin->initial_delay;
 550 #endif
 551 }
 552
 553 set<Evoral::Parameter>
 554 VSTPlugin::automatable () const
 555 {
 556         set<Evoral::Parameter> ret;
 557
 558         for (uint32_t i = 0; i < parameter_count(); ++i){
 559                 ret.insert (ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
 560         }
 561
 562         return ret;
 563 }
 564
 565 int
 566 VSTPlugin::connect_and_run (BufferSet& bufs,
 567                 ChanMapping in_map, ChanMapping out_map,
 568                 pframes_t nframes, framecnt_t offset)
 569 {
 570         Plugin::connect_and_run (bufs, in_map, out_map, nframes, offset);
 571
 572         float *ins[_plugin->numInputs];
 573         float *outs[_plugin->numOutputs];
 574         int32_t i;
 575
 576         const uint32_t nbufs = bufs.count().n_audio();
 577
 578         int in_index = 0;
 579         for (i = 0; i < (int32_t) _plugin->numInputs; ++i) {
 580                 ins[i] = bufs.get_audio(min((uint32_t) in_index, nbufs - 1)).data() + offset;
 581                 in_index++;
 582         }
 583
 584         int out_index = 0;
 585         for (i = 0; i < (int32_t) _plugin->numOutputs; ++i) {
 586                 outs[i] = bufs.get_audio(min((uint32_t) out_index, nbufs - 1)).data() + offset;
 587
 588                 /* unbelievably, several VST plugins still rely on Cubase
 589                    behaviour and do not silence the buffer in processReplacing
 590                    when they have no output.
 591                 */
 592
 593                 // memset (outs[i], 0, sizeof (Sample) * nframes);
 594                 out_index++;
 595         }
 596
 597
 598         if (bufs.count().n_midi() > 0) {
 599                 VstEvents* v = bufs.get_vst_midi (0);
 600                 _plugin->dispatcher (_plugin, effProcessEvents, 0, 0, v, 0);
 601         }
 602
 603         /* we already know it can support processReplacing */
 604         _plugin->processReplacing (_plugin, ins, outs, nframes);
 605
 606         return 0;
 607 }
 608
 609 void
 610 VSTPlugin::deactivate ()
 611 {
 612         _plugin->dispatcher (_plugin, effMainsChanged, 0, 0, NULL, 0.0f);
 613 }
 614
 615 void
 616 VSTPlugin::activate ()
 617 {
 618         _plugin->dispatcher (_plugin, effMainsChanged, 0, 1, NULL, 0.0f);
 619 }
 620
 621 string
 622 VSTPlugin::unique_id() const
 623 {
 624         char buf[32];
 625
 626 #ifdef VESTIGE_HEADER
 627        snprintf (buf, sizeof (buf), "%d", *((int32_t*) &_plugin->unused_id));
 628 #else
 629        snprintf (buf, sizeof (buf), "%d", _plugin->uniqueID);
 630 #endif
 631        return string (buf);
 632 }
 633
 634
 635 const char *
 636 VSTPlugin::name () const
 637 {
 638         return handle->name;
 639 }
 640
 641 const char *
 642 VSTPlugin::maker () const
 643 {
 644         return _info->creator.c_str();
 645 }
 646
 647 const char *
 648 VSTPlugin::label () const
 649 {
 650         return handle->name;
 651 }
 652
 653 uint32_t
 654 VSTPlugin::parameter_count() const
 655 {
 656         return _plugin->numParams;
 657 }
 658
 659 bool
 660 VSTPlugin::has_editor () const
 661 {
 662         return _plugin->flags & effFlagsHasEditor;
 663 }
 664
 665 void
 666 VSTPlugin::print_parameter (uint32_t param, char *buf, uint32_t len) const
 667 {
 668         char *first_nonws;
 669
 670         _plugin->dispatcher (_plugin, 7 /* effGetParamDisplay */, param, 0, buf, 0);
 671
 672         if (buf[0] == '\0') {
 673                 return;
 674         }
 675
 676         first_nonws = buf;
 677         while (*first_nonws && isspace (*first_nonws)) {
 678                 first_nonws++;
 679         }
 680         if (*first_nonws == '\0') {
 681                 return;
 682         }
 683
 684         memmove (buf, first_nonws, strlen (buf) - (first_nonws - buf) + 1);
 685 }
 686
 687 PluginPtr
 688 VSTPluginInfo::load (Session& session)
 689 {
 690         try {
 691                 PluginPtr plugin;
 692
 693                 if (Config->get_use_vst()) {
 694                         FSTHandle* handle;
 695
 696                         handle = fst_load(path.c_str());
 697
 698                         if ( (int)handle == -1) {
 699                                 error << string_compose(_("VST: cannot load module from \"%1\""), path) << endmsg;
 700                         } else {
 701                                 plugin.reset (new VSTPlugin (session.engine(), session, handle));
 702                         }
 703                 } else {
 704                         error << _("You asked ardour to not use any VST plugins") << endmsg;
 705                         return PluginPtr ((Plugin*) 0);
 706                 }
 707
 708                 plugin->set_info(PluginInfoPtr(new VSTPluginInfo(*this)));
 709                 return plugin;
 710         }
 711
 712         catch (failed_constructor &err) {
 713                 return PluginPtr ((Plugin*) 0);
 714         }
 715 }
 716
 717 void
 718 VSTPlugin::find_presets ()
 719 {
 720         /* Built-in presets */
 721
 722         int const vst_version = _plugin->dispatcher (_plugin, effGetVstVersion, 0, 0, NULL, 0);
 723         for (int i = 0; i < _plugin->numPrograms; ++i) {
 724                 PresetRecord r (string_compose (X_("VST:%1:%2"), unique_id (), i), "", false);
 725
 726                 if (vst_version >= 2) {
 727                         char buf[256];
 728                         if (_plugin->dispatcher (_plugin, 29, i, 0, buf, 0) == 1) {
 729                                 r.label = buf;
 730                         } else {
 731                                 r.label = string_compose (_("Preset %1"), i);
 732                         }
 733                 } else {
 734                         r.label = string_compose (_("Preset %1"), i);
 735                 }
 736
 737                 _presets.insert (make_pair (r.uri, r));
 738         }
 739
 740         /* User presets from our XML file */
 741
 742         boost::shared_ptr<XMLTree> t (presets_tree ());
 743
 744         if (t) {
 745                 XMLNode* root = t->root ();
 746                 for (XMLNodeList::const_iterator i = root->children().begin(); i != root->children().end(); ++i) {
 747
 748                         XMLProperty* uri = (*i)->property (X_("uri"));
 749                         XMLProperty* label = (*i)->property (X_("label"));
 750
 751                         assert (uri);
 752                         assert (label);
 753
 754                         PresetRecord r (uri->value(), label->value(), true);
 755                         _presets.insert (make_pair (r.uri, r));
 756                 }
 757         }
 758
 759 }
 760
 761 /** @return XMLTree with our user presets; could be a new one if no existing
 762  *  one was found, or 0 if one was present but badly-formatted.
 763  */
 764 XMLTree *
 765 VSTPlugin::presets_tree () const
 766 {
 767         XMLTree* t = new XMLTree;
 768
 769         sys::path p = ARDOUR::user_config_directory ();
 770         p /= "presets";
 771
 772         if (!is_directory (p)) {
 773                 create_directory (p);
 774         }
 775
 776         p /= presets_file ();
 777
 778         if (!exists (p)) {
 779                 t->set_root (new XMLNode (X_("VSTPresets")));
 780                 return t;
 781         }
 782
 783         t->set_filename (p.to_string ());
 784         if (!t->read ()) {
 785                 delete t;
 786                 return 0;
 787         }
 788
 789         return t;
 790 }
 791
 792 /** @return Index of the first user preset in our lists */
 793 int
 794 VSTPlugin::first_user_preset_index () const
 795 {
 796         return _plugin->numPrograms;
 797 }
 798
 799 string
 800 VSTPlugin::presets_file () const
 801 {
 802         return string_compose ("vst-%1", unique_id ());
 803 }
 804
 805 VSTPluginInfo::VSTPluginInfo()
 806 {
 807        type = ARDOUR::VST;
 808 }
 809