libs/ardour/ladspa_plugin.cc

   1 /*
   2     Copyright (C) 2000-2006 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 #define __STDC_FORMAT_MACROS 1
  21 #include <inttypes.h>
  22
  23 #include <vector>
  24 #include <string>
  25
  26 #include <cstdlib>
  27 #include <cstdio> // so libraptor doesn't complain
  28 #include <cmath>
  29 #include <dirent.h>
  30 #include <sys/stat.h>
  31 #include <cerrno>
  32
  33 #include <lrdf.h>
  34
  35 #include "pbd/compose.h"
  36 #include "pbd/error.h"
  37 #include "pbd/xml++.h"
  38
  39 #include "midi++/manager.h"
  40
  41 #include "ardour/ardour.h"
  42 #include "ardour/session.h"
  43 #include "ardour/audioengine.h"
  44 #include "ardour/ladspa_plugin.h"
  45 #include "ardour/buffer_set.h"
  46 #include "ardour/audio_buffer.h"
  47
  48 #include "pbd/stl_delete.h"
  49
  50 #include "i18n.h"
  51 #include <locale.h>
  52
  53 using namespace std;
  54 using namespace ARDOUR;
  55 using namespace PBD;
  56
  57 LadspaPlugin::LadspaPlugin (void *mod, AudioEngine& e, Session& session, uint32_t index, nframes_t rate)
  58         : Plugin (e, session)
  59 {
  60         init (mod, index, rate);
  61 }
  62
  63 LadspaPlugin::LadspaPlugin (const LadspaPlugin &other)
  64         : Plugin (other)
  65 {
  66         init (other._module, other._index, other._sample_rate);
  67
  68         for (uint32_t i = 0; i < parameter_count(); ++i) {
  69                 _control_data[i] = other._shadow_data[i];
  70                 _shadow_data[i] = other._shadow_data[i];
  71         }
  72 }
  73
  74 void
  75 LadspaPlugin::init (void *mod, uint32_t index, nframes_t rate)
  76 {
  77         LADSPA_Descriptor_Function dfunc;
  78         uint32_t i, port_cnt;
  79         const char *errstr;
  80
  81         _module = mod;
  82         _control_data = 0;
  83         _shadow_data = 0;
  84         _latency_control_port = 0;
  85         _was_activated = false;
  86
  87         dfunc = (LADSPA_Descriptor_Function) dlsym (_module, "ladspa_descriptor");
  88
  89         if ((errstr = dlerror()) != NULL) {
  90                 error << _("LADSPA: module has no descriptor function.") << endmsg;
  91                 throw failed_constructor();
  92         }
  93
  94         if ((_descriptor = dfunc (index)) == 0) {
  95                 error << _("LADSPA: plugin has gone away since discovery!") << endmsg;
  96                 throw failed_constructor();
  97         }
  98
  99         _index = index;
 100
 101         if (LADSPA_IS_INPLACE_BROKEN(_descriptor->Properties)) {
 102                 error << string_compose(_("LADSPA: \"%1\" cannot be used, since it cannot do inplace processing"), _descriptor->Name) << endmsg;
 103                 throw failed_constructor();
 104         }
 105
 106         _sample_rate = rate;
 107
 108         if (_descriptor->instantiate == 0) {
 109                 throw failed_constructor();
 110         }
 111
 112         if ((_handle = _descriptor->instantiate (_descriptor, rate)) == 0) {
 113                 throw failed_constructor();
 114         }
 115
 116         port_cnt = parameter_count();
 117
 118         _control_data = new LADSPA_Data[port_cnt];
 119         _shadow_data = new LADSPA_Data[port_cnt];
 120
 121         for (i = 0; i < port_cnt; ++i) {
 122                 if (LADSPA_IS_PORT_CONTROL(port_descriptor (i))) {
 123                         connect_port (i, &_control_data[i]);
 124
 125                         if (LADSPA_IS_PORT_OUTPUT(port_descriptor (i)) &&
 126                             strcmp (port_names()[i], X_("latency")) == 0) {
 127                                 _latency_control_port = &_control_data[i];
 128                                 *_latency_control_port = 0;
 129                         }
 130
 131                         if (!LADSPA_IS_PORT_INPUT(port_descriptor (i))) {
 132                                 continue;
 133                         }
 134
 135                         _shadow_data[i] = default_value (i);
 136                 }
 137         }
 138
 139         latency_compute_run ();
 140 }
 141
 142 LadspaPlugin::~LadspaPlugin ()
 143 {
 144         deactivate ();
 145         cleanup ();
 146
 147         /* XXX who should close a plugin? */
 148
 149         // dlclose (module);
 150
 151         delete [] _control_data;
 152         delete [] _shadow_data;
 153 }
 154
 155 string
 156 LadspaPlugin::unique_id() const
 157 {
 158         char buf[32];
 159         snprintf (buf, sizeof (buf), "%lu", _descriptor->UniqueID);
 160         return string (buf);
 161 }
 162
 163 float
 164 LadspaPlugin::default_value (uint32_t port)
 165 {
 166         const LADSPA_PortRangeHint *prh = port_range_hints();
 167         float ret = 0.0f;
 168         bool bounds_given = false;
 169         bool sr_scaling = false;
 170         bool earlier_hint = false;
 171
 172         /* defaults - case 1 */
 173
 174         if (LADSPA_IS_HINT_HAS_DEFAULT(prh[port].HintDescriptor)) {
 175                 if (LADSPA_IS_HINT_DEFAULT_MINIMUM(prh[port].HintDescriptor)) {
 176                         ret = prh[port].LowerBound;
 177                         bounds_given = true;
 178                         sr_scaling = true;
 179                 }
 180
 181                 else if (LADSPA_IS_HINT_DEFAULT_LOW(prh[port].HintDescriptor)) {
 182                         if (LADSPA_IS_HINT_LOGARITHMIC(prh[port].HintDescriptor)) {
 183                                 ret = exp(log(prh[port].LowerBound) * 0.75f + log(prh[port].UpperBound) * 0.25f);
 184                         }
 185                         else {
 186                                 ret = prh[port].LowerBound * 0.75f + prh[port].UpperBound * 0.25f;
 187                         }
 188                         bounds_given = true;
 189                         sr_scaling = true;
 190                 }
 191                 else if (LADSPA_IS_HINT_DEFAULT_MIDDLE(prh[port].HintDescriptor)) {
 192                         if (LADSPA_IS_HINT_LOGARITHMIC(prh[port].HintDescriptor)) {
 193                                 ret = exp(log(prh[port].LowerBound) * 0.5f + log(prh[port].UpperBound) * 0.5f);
 194                         }
 195                         else {
 196                                 ret = prh[port].LowerBound * 0.5f + prh[port].UpperBound * 0.5f;
 197                         }
 198                         bounds_given = true;
 199                         sr_scaling = true;
 200                 }
 201                 else if (LADSPA_IS_HINT_DEFAULT_HIGH(prh[port].HintDescriptor)) {
 202                         if (LADSPA_IS_HINT_LOGARITHMIC(prh[port].HintDescriptor)) {
 203                                 ret = exp(log(prh[port].LowerBound) * 0.25f + log(prh[port].UpperBound) * 0.75f);
 204                         }
 205                         else {
 206                                 ret = prh[port].LowerBound * 0.25f + prh[port].UpperBound * 0.75f;
 207                         }
 208                         bounds_given = true;
 209                         sr_scaling = true;
 210                 }
 211                 else if (LADSPA_IS_HINT_DEFAULT_MAXIMUM(prh[port].HintDescriptor)) {
 212                         ret = prh[port].UpperBound;
 213                         bounds_given = true;
 214                         sr_scaling = true;
 215                 }
 216                 else if (LADSPA_IS_HINT_DEFAULT_0(prh[port].HintDescriptor)) {
 217                         ret = 0.0f;
 218                         earlier_hint = true;
 219                 }
 220                 else if (LADSPA_IS_HINT_DEFAULT_1(prh[port].HintDescriptor)) {
 221                         ret = 1.0f;
 222                         earlier_hint = true;
 223                 }
 224                 else if (LADSPA_IS_HINT_DEFAULT_100(prh[port].HintDescriptor)) {
 225                         ret = 100.0f;
 226                         earlier_hint = true;
 227                 }
 228                 else if (LADSPA_IS_HINT_DEFAULT_440(prh[port].HintDescriptor)) {
 229                         ret = 440.0f;
 230                         earlier_hint = true;
 231                 }
 232                 else {
 233                         /* no hint found */
 234                         ret = 0.0f;
 235                 }
 236         }
 237
 238         /* defaults - case 2 */
 239         else if (LADSPA_IS_HINT_BOUNDED_BELOW(prh[port].HintDescriptor) &&
 240                  !LADSPA_IS_HINT_BOUNDED_ABOVE(prh[port].HintDescriptor)) {
 241
 242                 if (prh[port].LowerBound < 0) {
 243                         ret = 0.0f;
 244                 } else {
 245                         ret = prh[port].LowerBound;
 246                 }
 247
 248                 bounds_given = true;
 249                 sr_scaling = true;
 250         }
 251
 252         /* defaults - case 3 */
 253         else if (!LADSPA_IS_HINT_BOUNDED_BELOW(prh[port].HintDescriptor) &&
 254                  LADSPA_IS_HINT_BOUNDED_ABOVE(prh[port].HintDescriptor)) {
 255
 256                 if (prh[port].UpperBound > 0) {
 257                         ret = 0.0f;
 258                 } else {
 259                         ret = prh[port].UpperBound;
 260                 }
 261
 262                 bounds_given = true;
 263                 sr_scaling = true;
 264         }
 265
 266         /* defaults - case 4 */
 267         else if (LADSPA_IS_HINT_BOUNDED_BELOW(prh[port].HintDescriptor) &&
 268                  LADSPA_IS_HINT_BOUNDED_ABOVE(prh[port].HintDescriptor)) {
 269
 270                 if (prh[port].LowerBound < 0 && prh[port].UpperBound > 0) {
 271                         ret = 0.0f;
 272                 } else if (prh[port].LowerBound < 0 && prh[port].UpperBound < 0) {
 273                         ret = prh[port].UpperBound;
 274                 } else {
 275                         ret = prh[port].LowerBound;
 276                 }
 277                 bounds_given = true;
 278                 sr_scaling = true;
 279         }
 280
 281         /* defaults - case 5 */
 282
 283         if (LADSPA_IS_HINT_SAMPLE_RATE(prh[port].HintDescriptor) && !earlier_hint) {
 284                 if (bounds_given) {
 285                         if (sr_scaling) {
 286                                 ret *= _sample_rate;
 287                         }
 288                 } else {
 289                         ret = _sample_rate;
 290                 }
 291         }
 292
 293         return ret;
 294 }
 295
 296 void
 297 LadspaPlugin::set_parameter (uint32_t which, float val)
 298 {
 299         if (which < _descriptor->PortCount) {
 300                 _shadow_data[which] = (LADSPA_Data) val;
 301 #if 0
 302                 ParameterChanged (Parameter(PluginAutomation, 0, which), val); /* EMIT SIGNAL */
 303
 304                 if (which < parameter_count() && controls[which]) {
 305                         controls[which]->Changed ();
 306                 }
 307 #endif
 308
 309         } else {
 310                 warning << string_compose (_("illegal parameter number used with plugin \"%1\". This may"
 311                                              "indicate a change in the plugin design, and presets may be"
 312                                              "invalid"), name())
 313                         << endmsg;
 314         }
 315 }
 316
 317 float
 318 LadspaPlugin::get_parameter (uint32_t which) const
 319 {
 320         if (LADSPA_IS_PORT_INPUT(port_descriptor (which))) {
 321                 return (float) _shadow_data[which];
 322         } else {
 323                 return (float) _control_data[which];
 324         }
 325 }
 326
 327 uint32_t
 328 LadspaPlugin::nth_parameter (uint32_t n, bool& ok) const
 329 {
 330         uint32_t x, c;
 331
 332         ok = false;
 333
 334         for (c = 0, x = 0; x < _descriptor->PortCount; ++x) {
 335                 if (LADSPA_IS_PORT_CONTROL (port_descriptor (x))) {
 336                         if (c++ == n) {
 337                                 ok = true;
 338                                 return x;
 339                         }
 340                 }
 341         }
 342         return 0;
 343 }
 344
 345 XMLNode&
 346 LadspaPlugin::get_state()
 347 {
 348         XMLNode *root = new XMLNode(state_node_name());
 349         XMLNode *child;
 350         char buf[16];
 351         LocaleGuard lg (X_("POSIX"));
 352
 353         for (uint32_t i = 0; i < parameter_count(); ++i){
 354
 355                 if (LADSPA_IS_PORT_INPUT(port_descriptor (i)) &&
 356                     LADSPA_IS_PORT_CONTROL(port_descriptor (i))){
 357
 358                         child = new XMLNode("Port");
 359                         snprintf(buf, sizeof(buf), "%u", i);
 360                         child->add_property("number", string(buf));
 361                         snprintf(buf, sizeof(buf), "%+f", _shadow_data[i]);
 362                         child->add_property("value", string(buf));
 363                         root->add_child_nocopy (*child);
 364                 }
 365         }
 366
 367         return *root;
 368 }
 369
 370 bool
 371 LadspaPlugin::save_preset (string name)
 372 {
 373         return Plugin::save_preset (name, "ladspa");
 374 }
 375
 376 int
 377 LadspaPlugin::set_state (const XMLNode& node, int version)
 378 {
 379         if (version < 3000) {
 380                 return set_state_2X (node, version);
 381         }
 382
 383         XMLNodeList nodes;
 384         XMLProperty *prop;
 385         XMLNodeConstIterator iter;
 386         XMLNode *child;
 387         const char *port;
 388         const char *data;
 389         uint32_t port_id;
 390         LocaleGuard lg (X_("POSIX"));
 391
 392         if (node.name() != state_node_name()) {
 393                 error << _("Bad node sent to LadspaPlugin::set_state") << endmsg;
 394                 return -1;
 395         }
 396
 397         nodes = node.children ("Port");
 398
 399         for(iter = nodes.begin(); iter != nodes.end(); ++iter){
 400
 401                 child = *iter;
 402
 403                 if ((prop = child->property("number")) != 0) {
 404                         port = prop->value().c_str();
 405                 } else {
 406                         warning << _("LADSPA: no ladspa port number") << endmsg;
 407                         continue;
 408                 }
 409                 if ((prop = child->property("value")) != 0) {
 410                         data = prop->value().c_str();
 411                 } else {
 412                         warning << _("LADSPA: no ladspa port data") << endmsg;
 413                         continue;
 414                 }
 415
 416                 sscanf (port, "%" PRIu32, &port_id);
 417                 set_parameter (port_id, atof(data));
 418         }
 419
 420         latency_compute_run ();
 421
 422         return 0;
 423 }
 424
 425 int
 426 LadspaPlugin::set_state_2X (const XMLNode& node, int /* version */)
 427 {
 428         XMLNodeList nodes;
 429         XMLProperty *prop;
 430         XMLNodeConstIterator iter;
 431         XMLNode *child;
 432         const char *port;
 433         const char *data;
 434         uint32_t port_id;
 435         LocaleGuard lg (X_("POSIX"));
 436
 437         if (node.name() != state_node_name()) {
 438                 error << _("Bad node sent to LadspaPlugin::set_state") << endmsg;
 439                 return -1;
 440         }
 441
 442         nodes = node.children ("port");
 443
 444         for(iter = nodes.begin(); iter != nodes.end(); ++iter){
 445
 446                 child = *iter;
 447
 448                 if ((prop = child->property("number")) != 0) {
 449                         port = prop->value().c_str();
 450                 } else {
 451                         warning << _("LADSPA: no ladspa port number") << endmsg;
 452                         continue;
 453                 }
 454                 if ((prop = child->property("value")) != 0) {
 455                         data = prop->value().c_str();
 456                 } else {
 457                         warning << _("LADSPA: no ladspa port data") << endmsg;
 458                         continue;
 459                 }
 460
 461                 sscanf (port, "%" PRIu32, &port_id);
 462                 set_parameter (port_id, atof(data));
 463         }
 464
 465         latency_compute_run ();
 466
 467         return 0;
 468 }
 469
 470 int
 471 LadspaPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& desc) const
 472 {
 473         LADSPA_PortRangeHint prh;
 474
 475         prh  = port_range_hints()[which];
 476
 477
 478         if (LADSPA_IS_HINT_BOUNDED_BELOW(prh.HintDescriptor)) {
 479                 desc.min_unbound = false;
 480                 if (LADSPA_IS_HINT_SAMPLE_RATE(prh.HintDescriptor)) {
 481                         desc.lower = prh.LowerBound * _session.frame_rate();
 482                 } else {
 483                         desc.lower = prh.LowerBound;
 484                 }
 485         } else {
 486                 desc.min_unbound = true;
 487                 desc.lower = 0;
 488         }
 489
 490
 491         if (LADSPA_IS_HINT_BOUNDED_ABOVE(prh.HintDescriptor)) {
 492                 desc.max_unbound = false;
 493                 if (LADSPA_IS_HINT_SAMPLE_RATE(prh.HintDescriptor)) {
 494                         desc.upper = prh.UpperBound * _session.frame_rate();
 495                 } else {
 496                         desc.upper = prh.UpperBound;
 497                 }
 498         } else {
 499                 desc.max_unbound = true;
 500                 desc.upper = 4; /* completely arbitrary */
 501         }
 502
 503         if (LADSPA_IS_HINT_INTEGER (prh.HintDescriptor)) {
 504                 desc.step = 1.0;
 505                 desc.smallstep = 0.1;
 506                 desc.largestep = 10.0;
 507         } else {
 508                 float delta = desc.upper - desc.lower;
 509                 desc.step = delta / 1000.0f;
 510                 desc.smallstep = delta / 10000.0f;
 511                 desc.largestep = delta/10.0f;
 512         }
 513
 514         desc.toggled = LADSPA_IS_HINT_TOGGLED (prh.HintDescriptor);
 515         desc.logarithmic = LADSPA_IS_HINT_LOGARITHMIC (prh.HintDescriptor);
 516         desc.sr_dependent = LADSPA_IS_HINT_SAMPLE_RATE (prh.HintDescriptor);
 517         desc.integer_step = LADSPA_IS_HINT_INTEGER (prh.HintDescriptor);
 518
 519         desc.label = port_names()[which];
 520
 521         return 0;
 522 }
 523
 524 string
 525 LadspaPlugin::describe_parameter (Evoral::Parameter which)
 526 {
 527         if (which.type() == PluginAutomation && which.id() < parameter_count()) {
 528                 return port_names()[which.id()];
 529         } else {
 530                 return "??";
 531         }
 532 }
 533
 534 ARDOUR::nframes_t
 535 LadspaPlugin::signal_latency () const
 536 {
 537         if (_user_latency) {
 538                 return _user_latency;
 539         }
 540
 541         if (_latency_control_port) {
 542                 return (nframes_t) floor (*_latency_control_port);
 543         } else {
 544                 return 0;
 545         }
 546 }
 547
 548 set<Evoral::Parameter>
 549 LadspaPlugin::automatable () const
 550 {
 551         set<Evoral::Parameter> ret;
 552
 553         for (uint32_t i = 0; i < parameter_count(); ++i){
 554                 if (LADSPA_IS_PORT_INPUT(port_descriptor (i)) &&
 555                     LADSPA_IS_PORT_CONTROL(port_descriptor (i))){
 556
 557                         ret.insert (ret.end(), Evoral::Parameter(PluginAutomation, 0, i));
 558                 }
 559         }
 560
 561         return ret;
 562 }
 563
 564 int
 565 LadspaPlugin::connect_and_run (BufferSet& bufs,
 566                 ChanMapping in_map, ChanMapping out_map,
 567                 nframes_t nframes, nframes_t offset)
 568 {
 569         cycles_t now;
 570         cycles_t then = get_cycles ();
 571
 572         uint32_t audio_in_index  = 0;
 573         uint32_t audio_out_index = 0;
 574         for (uint32_t port_index = 0; port_index < parameter_count(); ++port_index) {
 575                 if (LADSPA_IS_PORT_AUDIO(port_descriptor(port_index))) {
 576                         if (LADSPA_IS_PORT_INPUT(port_descriptor(port_index))) {
 577                                 const uint32_t buf_index = in_map.get(DataType::AUDIO, audio_in_index++);
 578                                 connect_port(port_index, bufs.get_audio(buf_index).data(offset));
 579                         } else if (LADSPA_IS_PORT_OUTPUT(port_descriptor(port_index))) {
 580                                 const uint32_t buf_index = out_map.get(DataType::AUDIO, audio_out_index++);
 581                                 connect_port(port_index, bufs.get_audio(buf_index).data(offset));
 582                         }
 583                 }
 584         }
 585
 586         run_in_place (nframes);
 587         now = get_cycles ();
 588         set_cycles ((uint32_t) (now - then));
 589
 590         return 0;
 591 }
 592
 593 bool
 594 LadspaPlugin::parameter_is_control (uint32_t param) const
 595 {
 596         return LADSPA_IS_PORT_CONTROL(port_descriptor (param));
 597 }
 598
 599 bool
 600 LadspaPlugin::parameter_is_audio (uint32_t param) const
 601 {
 602         return LADSPA_IS_PORT_AUDIO(port_descriptor (param));
 603 }
 604
 605 bool
 606 LadspaPlugin::parameter_is_output (uint32_t param) const
 607 {
 608         return LADSPA_IS_PORT_OUTPUT(port_descriptor (param));
 609 }
 610
 611 bool
 612 LadspaPlugin::parameter_is_input (uint32_t param) const
 613 {
 614         return LADSPA_IS_PORT_INPUT(port_descriptor (param));
 615 }
 616
 617 void
 618 LadspaPlugin::print_parameter (uint32_t param, char *buf, uint32_t len) const
 619 {
 620         if (buf && len) {
 621                 if (param < parameter_count()) {
 622                         snprintf (buf, len, "%.3f", get_parameter (param));
 623                 } else {
 624                         strcat (buf, "0");
 625                 }
 626         }
 627 }
 628
 629 void
 630 LadspaPlugin::run_in_place (nframes_t nframes)
 631 {
 632         for (uint32_t i = 0; i < parameter_count(); ++i) {
 633                 if (LADSPA_IS_PORT_INPUT(port_descriptor (i)) && LADSPA_IS_PORT_CONTROL(port_descriptor (i))) {
 634                         _control_data[i] = _shadow_data[i];
 635                 }
 636         }
 637         _descriptor->run (_handle, nframes);
 638 }
 639
 640 void
 641 LadspaPlugin::latency_compute_run ()
 642 {
 643         if (!_latency_control_port) {
 644                 return;
 645         }
 646
 647         /* we need to run the plugin so that it can set its latency
 648            parameter.
 649         */
 650
 651         activate ();
 652
 653         uint32_t port_index = 0;
 654         uint32_t in_index = 0;
 655         uint32_t out_index = 0;
 656         const nframes_t bufsize = 1024;
 657         LADSPA_Data buffer[bufsize];
 658
 659         memset(buffer,0,sizeof(LADSPA_Data)*bufsize);
 660
 661         /* Note that we've already required that plugins
 662            be able to handle in-place processing.
 663         */
 664
 665         port_index = 0;
 666
 667         while (port_index < parameter_count()) {
 668                 if (LADSPA_IS_PORT_AUDIO (port_descriptor (port_index))) {
 669                         if (LADSPA_IS_PORT_INPUT (port_descriptor (port_index))) {
 670                                 connect_port (port_index, buffer);
 671                                 in_index++;
 672                         } else if (LADSPA_IS_PORT_OUTPUT (port_descriptor (port_index))) {
 673                                 connect_port (port_index, buffer);
 674                                 out_index++;
 675                         }
 676                 }
 677                 port_index++;
 678         }
 679
 680         run_in_place (bufsize);
 681         deactivate ();
 682 }
 683
 684 PluginPtr
 685 LadspaPluginInfo::load (Session& session)
 686 {
 687         try {
 688                 PluginPtr plugin;
 689                 void *module;
 690
 691                 if ((module = dlopen (path.c_str(), RTLD_NOW)) == 0) {
 692                         error << string_compose(_("LADSPA: cannot load module from \"%1\""), path) << endmsg;
 693                         error << dlerror() << endmsg;
 694                         return PluginPtr ((Plugin*) 0);
 695                 } else {
 696                         plugin.reset (new LadspaPlugin (module, session.engine(), session, index, session.frame_rate()));
 697                 }
 698
 699                 plugin->set_info(PluginInfoPtr(new LadspaPluginInfo(*this)));
 700                 return plugin;
 701         }
 702
 703         catch (failed_constructor &err) {
 704                 return PluginPtr ((Plugin*) 0);
 705         }
 706 }
 707
 708 LadspaPluginInfo::LadspaPluginInfo()
 709 {
 710        type = ARDOUR::LADSPA;
 711 }