libs/ardour/audio_unit.cc

   1 /*
   2     Copyright (C) 2006-2009 Paul Davis
   3     Some portions Copyright (C) Sophia Poirier.
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include <sstream>
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <math.h>
  25 #include <ctype.h>
  26
  27 #include "pbd/transmitter.h"
  28 #include "pbd/xml++.h"
  29 #include "pbd/convert.h"
  30 #include "pbd/whitespace.h"
  31 #include "pbd/pathscanner.h"
  32 #include "pbd/locale_guard.h"
  33
  34 #include <glibmm/thread.h>
  35 #include <glibmm/fileutils.h>
  36 #include <glibmm/miscutils.h>
  37
  38 #include "ardour/ardour.h"
  39 #include "ardour/audioengine.h"
  40 #include "ardour/audio_buffer.h"
  41 #include "ardour/midi_buffer.h"
  42 #include "ardour/filesystem_paths.h"
  43 #include "ardour/io.h"
  44 #include "ardour/audio_unit.h"
  45 #include "ardour/session.h"
  46 #include "ardour/tempo.h"
  47 #include "ardour/utils.h"
  48
  49 #include "appleutility/CAAudioUnit.h"
  50 #include "appleutility/CAAUParameter.h"
  51
  52 #include <CoreFoundation/CoreFoundation.h>
  53 #include <CoreServices/CoreServices.h>
  54 #include <AudioUnit/AudioUnit.h>
  55 #include <AudioToolbox/AudioUnitUtilities.h>
  56
  57 #include "i18n.h"
  58
  59 using namespace std;
  60 using namespace PBD;
  61 using namespace ARDOUR;
  62
  63 //#define TRACE_AU_API
  64 #ifdef TRACE_AU_API
  65 #define TRACE_API(fmt,...) fprintf (stderr, fmt, ## __VA_ARGS__)
  66 #else
  67 #define TRACE_API(fmt,...)
  68 #endif
  69
  70 #ifndef AU_STATE_SUPPORT
  71 static bool seen_get_state_message = false;
  72 static bool seen_set_state_message = false;
  73 static bool seen_loading_message = false;
  74 static bool seen_saving_message = false;
  75 #endif
  76
  77 AUPluginInfo::CachedInfoMap AUPluginInfo::cached_info;
  78
  79 static string preset_search_path = "/Library/Audio/Presets:/Network/Library/Audio/Presets";
  80 static string preset_suffix = ".aupreset";
  81 static bool preset_search_path_initialized = false;
  82 static bool debug_io_config = true;
  83
  84 static OSStatus
  85 _render_callback(void *userData,
  86                  AudioUnitRenderActionFlags *ioActionFlags,
  87                  const AudioTimeStamp    *inTimeStamp,
  88                  UInt32       inBusNumber,
  89                  UInt32       inNumberFrames,
  90                  AudioBufferList*       ioData)
  91 {
  92         if (userData) {
  93                 return ((AUPlugin*)userData)->render_callback (ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, ioData);
  94         }
  95         return paramErr;
  96 }
  97
  98 static OSStatus
  99 _get_beat_and_tempo_callback (void*                userData,
 100                               Float64*             outCurrentBeat,
 101                               Float64*             outCurrentTempo)
 102 {
 103         if (userData) {
 104                 return ((AUPlugin*)userData)->get_beat_and_tempo_callback (outCurrentBeat, outCurrentTempo);
 105         }
 106
 107         return paramErr;
 108 }
 109
 110 static OSStatus
 111 _get_musical_time_location_callback (void *     userData,
 112                                      UInt32 *   outDeltaSampleOffsetToNextBeat,
 113                                      Float32 *  outTimeSig_Numerator,
 114                                      UInt32 *   outTimeSig_Denominator,
 115                                      Float64 *  outCurrentMeasureDownBeat)
 116 {
 117         if (userData) {
 118                 return ((AUPlugin*)userData)->get_musical_time_location_callback (outDeltaSampleOffsetToNextBeat,
 119                                                                                   outTimeSig_Numerator,
 120                                                                                   outTimeSig_Denominator,
 121                                                                                   outCurrentMeasureDownBeat);
 122         }
 123         return paramErr;
 124 }
 125
 126 static OSStatus
 127 _get_transport_state_callback (void*     userData,
 128                                Boolean*  outIsPlaying,
 129                                Boolean*  outTransportStateChanged,
 130                                Float64*  outCurrentSampleInTimeLine,
 131                                Boolean*  outIsCycling,
 132                                Float64*  outCycleStartBeat,
 133                                Float64*  outCycleEndBeat)
 134 {
 135         if (userData) {
 136                 return ((AUPlugin*)userData)->get_transport_state_callback (outIsPlaying, outTransportStateChanged,
 137                                                                             outCurrentSampleInTimeLine, outIsCycling,
 138                                                                             outCycleStartBeat, outCycleEndBeat);
 139         }
 140         return paramErr;
 141 }
 142
 143
 144 static int
 145 save_property_list (CFPropertyListRef propertyList, Glib::ustring path)
 146
 147 {
 148         CFDataRef xmlData;
 149         int fd;
 150
 151         // Convert the property list into XML data.
 152
 153         xmlData = CFPropertyListCreateXMLData( kCFAllocatorDefault, propertyList);
 154
 155         if (!xmlData) {
 156                 error << _("Could not create XML version of property list") << endmsg;
 157                 return -1;
 158         }
 159
 160         // Write the XML data to the file.
 161
 162         fd = open (path.c_str(), O_WRONLY|O_CREAT|O_EXCL, 0664);
 163         while (fd < 0) {
 164                 if (errno == EEXIST) {
 165                         error << string_compose (_("Preset file %1 exists; not overwriting"), path);
 166                 } else {
 167                         error << string_compose (_("Cannot open preset file %1 (%2)"), path, strerror (errno)) << endmsg;
 168                 }
 169                 CFRelease (xmlData);
 170                 return -1;
 171         }
 172
 173         size_t cnt = CFDataGetLength (xmlData);
 174
 175         if (write (fd, CFDataGetBytePtr (xmlData), cnt) != (ssize_t) cnt) {
 176                 CFRelease (xmlData);
 177                 close (fd);
 178                 return -1;
 179         }
 180
 181         close (fd);
 182         return 0;
 183 }
 184
 185
 186 static CFPropertyListRef
 187 load_property_list (Glib::ustring path)
 188 {
 189         int fd;
 190         CFPropertyListRef propertyList = 0;
 191         CFDataRef         xmlData;
 192         CFStringRef       errorString;
 193
 194         // Read the XML file.
 195
 196         if ((fd = open (path.c_str(), O_RDONLY)) < 0) {
 197                 return propertyList;
 198
 199         }
 200
 201         off_t len = lseek (fd, 0, SEEK_END);
 202         char* buf = new char[len];
 203         lseek (fd, 0, SEEK_SET);
 204
 205         if (read (fd, buf, len) != len) {
 206                 delete [] buf;
 207                 close (fd);
 208                 return propertyList;
 209         }
 210
 211         close (fd);
 212
 213         xmlData = CFDataCreateWithBytesNoCopy (kCFAllocatorDefault, (UInt8*) buf, len, kCFAllocatorNull);
 214
 215         // Reconstitute the dictionary using the XML data.
 216
 217         propertyList = CFPropertyListCreateFromXMLData( kCFAllocatorDefault,
 218                                                         xmlData,
 219                                                         kCFPropertyListImmutable,
 220                                                         &errorString);
 221
 222         CFRelease (xmlData);
 223         delete [] buf;
 224
 225         return propertyList;
 226 }
 227
 228 //-----------------------------------------------------------------------------
 229 static void
 230 set_preset_name_in_plist (CFPropertyListRef plist, string preset_name)
 231 {
 232         if (!plist) {
 233                 return;
 234         }
 235         CFStringRef pn = CFStringCreateWithCString (kCFAllocatorDefault, preset_name.c_str(), kCFStringEncodingUTF8);
 236
 237         if (CFGetTypeID (plist) == CFDictionaryGetTypeID()) {
 238                 CFDictionarySetValue ((CFMutableDictionaryRef)plist, CFSTR(kAUPresetNameKey), pn);
 239         }
 240
 241         CFRelease (pn);
 242 }
 243
 244 //-----------------------------------------------------------------------------
 245 static std::string
 246 get_preset_name_in_plist (CFPropertyListRef plist)
 247 {
 248         std::string ret;
 249
 250         if (!plist) {
 251                 return ret;
 252         }
 253
 254         if (CFGetTypeID (plist) == CFDictionaryGetTypeID()) {
 255                 const void *p = CFDictionaryGetValue ((CFMutableDictionaryRef)plist, CFSTR(kAUPresetNameKey));
 256                 if (p) {
 257                         CFStringRef str = (CFStringRef) p;
 258                         int len = CFStringGetLength(str);
 259                         len =  (len * 2) + 1;
 260                         char local_buffer[len];
 261                         if (CFStringGetCString (str, local_buffer, len, kCFStringEncodingUTF8)) {
 262                                 ret = local_buffer;
 263                         }
 264                 }
 265         }
 266         return ret;
 267 }
 268
 269 //--------------------------------------------------------------------------
 270 // general implementation for ComponentDescriptionsMatch() and ComponentDescriptionsMatch_Loosely()
 271 // if inIgnoreType is true, then the type code is ignored in the ComponentDescriptions
 272 Boolean ComponentDescriptionsMatch_General(const ComponentDescription * inComponentDescription1, const ComponentDescription * inComponentDescription2, Boolean inIgnoreType);
 273 Boolean ComponentDescriptionsMatch_General(const ComponentDescription * inComponentDescription1, const ComponentDescription * inComponentDescription2, Boolean inIgnoreType)
 274 {
 275         if ( (inComponentDescription1 == NULL) || (inComponentDescription2 == NULL) )
 276                 return FALSE;
 277
 278         if ( (inComponentDescription1->componentSubType == inComponentDescription2->componentSubType)
 279                         && (inComponentDescription1->componentManufacturer == inComponentDescription2->componentManufacturer) )
 280         {
 281                 // only sub-type and manufacturer IDs need to be equal
 282                 if (inIgnoreType)
 283                         return TRUE;
 284                 // type, sub-type, and manufacturer IDs all need to be equal in order to call this a match
 285                 else if (inComponentDescription1->componentType == inComponentDescription2->componentType)
 286                         return TRUE;
 287         }
 288
 289         return FALSE;
 290 }
 291
 292 //--------------------------------------------------------------------------
 293 // general implementation for ComponentAndDescriptionMatch() and ComponentAndDescriptionMatch_Loosely()
 294 // if inIgnoreType is true, then the type code is ignored in the ComponentDescriptions
 295 Boolean ComponentAndDescriptionMatch_General(Component inComponent, const ComponentDescription * inComponentDescription, Boolean inIgnoreType);
 296 Boolean ComponentAndDescriptionMatch_General(Component inComponent, const ComponentDescription * inComponentDescription, Boolean inIgnoreType)
 297 {
 298         OSErr status;
 299         ComponentDescription desc;
 300
 301         if ( (inComponent == NULL) || (inComponentDescription == NULL) )
 302                 return FALSE;
 303
 304         // get the ComponentDescription of the input Component
 305         status = GetComponentInfo(inComponent, &desc, NULL, NULL, NULL);
 306         if (status != noErr)
 307                 return FALSE;
 308
 309         // check if the Component's ComponentDescription matches the input ComponentDescription
 310         return ComponentDescriptionsMatch_General(&desc, inComponentDescription, inIgnoreType);
 311 }
 312
 313 //--------------------------------------------------------------------------
 314 // determine if 2 ComponentDescriptions are basically equal
 315 // (by that, I mean that the important identifying values are compared,
 316 // but not the ComponentDescription flags)
 317 Boolean ComponentDescriptionsMatch(const ComponentDescription * inComponentDescription1, const ComponentDescription * inComponentDescription2)
 318 {
 319         return ComponentDescriptionsMatch_General(inComponentDescription1, inComponentDescription2, FALSE);
 320 }
 321
 322 //--------------------------------------------------------------------------
 323 // determine if 2 ComponentDescriptions have matching sub-type and manufacturer codes
 324 Boolean ComponentDescriptionsMatch_Loose(const ComponentDescription * inComponentDescription1, const ComponentDescription * inComponentDescription2)
 325 {
 326         return ComponentDescriptionsMatch_General(inComponentDescription1, inComponentDescription2, TRUE);
 327 }
 328
 329 //--------------------------------------------------------------------------
 330 // determine if a ComponentDescription basically matches that of a particular Component
 331 Boolean ComponentAndDescriptionMatch(Component inComponent, const ComponentDescription * inComponentDescription)
 332 {
 333         return ComponentAndDescriptionMatch_General(inComponent, inComponentDescription, FALSE);
 334 }
 335
 336 //--------------------------------------------------------------------------
 337 // determine if a ComponentDescription matches only the sub-type and manufacturer codes of a particular Component
 338 Boolean ComponentAndDescriptionMatch_Loosely(Component inComponent, const ComponentDescription * inComponentDescription)
 339 {
 340         return ComponentAndDescriptionMatch_General(inComponent, inComponentDescription, TRUE);
 341 }
 342
 343
 344 AUPlugin::AUPlugin (AudioEngine& engine, Session& session, boost::shared_ptr<CAComponent> _comp)
 345         : Plugin (engine, session)
 346         , comp (_comp)
 347         , unit (new CAAudioUnit)
 348         , initialized (false)
 349         , _current_block_size (0)
 350         , _requires_fixed_size_buffers (false)
 351         , buffers (0)
 352         , current_maxbuf (0)
 353         , current_offset (0)
 354         , current_buffers (0)
 355         , frames_processed (0)
 356         , last_transport_rolling (false)
 357         , last_transport_speed (0.0)
 358 {
 359         if (!preset_search_path_initialized) {
 360                 Glib::ustring p = Glib::get_home_dir();
 361                 p += "/Library/Audio/Presets:";
 362                 p += preset_search_path;
 363                 preset_search_path = p;
 364                 preset_search_path_initialized = true;
 365         }
 366
 367         init ();
 368 }
 369
 370 AUPlugin::AUPlugin (const AUPlugin& other)
 371         : Plugin (other)
 372         , comp (other.get_comp())
 373         , unit (new CAAudioUnit)
 374         , initialized (false)
 375         , _current_block_size (0)
 376         , _last_nframes (0)
 377         , _requires_fixed_size_buffers (false)
 378         , buffers (0)
 379         , current_maxbuf (0)
 380         , current_offset (0)
 381         , current_buffers (0)
 382         , frames_processed (0)
 383
 384 {
 385         init ();
 386 }
 387
 388 AUPlugin::~AUPlugin ()
 389 {
 390         if (unit) {
 391                 TRACE_API ("about to call uninitialize in plugin destructor\n");
 392                 unit->Uninitialize ();
 393         }
 394
 395         if (buffers) {
 396                 free (buffers);
 397         }
 398 }
 399
 400 void
 401 AUPlugin::discover_factory_presets ()
 402 {
 403         CFArrayRef presets;
 404         UInt32 dataSize = sizeof (presets);
 405         OSStatus err;
 406
 407         TRACE_API ("get property FactoryPresets in global scope\n");
 408         if ((err = unit->GetProperty (kAudioUnitProperty_FactoryPresets, kAudioUnitScope_Global, 0, (void*) &presets, &dataSize)) != 0) {
 409                 cerr << "cannot get factory preset info: " << err << endl;
 410                 return;
 411         }
 412
 413         if (!presets) {
 414                 return;
 415         }
 416
 417         CFIndex cnt = CFArrayGetCount (presets);
 418
 419         for (CFIndex i = 0; i < cnt; ++i) {
 420                 AUPreset* preset = (AUPreset*) CFArrayGetValueAtIndex (presets, i);
 421
 422                 string name = CFStringRefToStdString (preset->presetName);
 423                 factory_preset_map[name] = preset->presetNumber;
 424         }
 425
 426         CFRelease (presets);
 427 }
 428
 429 void
 430 AUPlugin::init ()
 431 {
 432         OSErr err;
 433
 434         try {
 435                 TRACE_API ("opening AudioUnit\n");
 436                 err = CAAudioUnit::Open (*(comp.get()), *unit);
 437         } catch (...) {
 438                 error << _("Exception thrown during AudioUnit plugin loading - plugin ignored") << endmsg;
 439                 throw failed_constructor();
 440         }
 441
 442         if (err != noErr) {
 443                 error << _("AudioUnit: Could not convert CAComponent to CAAudioUnit") << endmsg;
 444                 throw failed_constructor ();
 445         }
 446
 447         TRACE_API ("count global elements\n");
 448         unit->GetElementCount (kAudioUnitScope_Global, global_elements);
 449         TRACE_API ("count input elements\n");
 450         unit->GetElementCount (kAudioUnitScope_Input, input_elements);
 451         TRACE_API ("count output elements\n");
 452         unit->GetElementCount (kAudioUnitScope_Output, output_elements);
 453
 454         if (input_elements > 0) {
 455                 AURenderCallbackStruct renderCallbackInfo;
 456
 457                 renderCallbackInfo.inputProc = _render_callback;
 458                 renderCallbackInfo.inputProcRefCon = this;
 459
 460                 TRACE_API ("set render callback in input scope\n");
 461                 if ((err = unit->SetProperty (kAudioUnitProperty_SetRenderCallback, kAudioUnitScope_Input,
 462                                               0, (void*) &renderCallbackInfo, sizeof(renderCallbackInfo))) != 0) {
 463                         cerr << "cannot install render callback (err = " << err << ')' << endl;
 464                         throw failed_constructor();
 465                 }
 466         }
 467
 468         /* tell the plugin about tempo/meter/transport callbacks in case it wants them */
 469
 470         HostCallbackInfo info;
 471         memset (&info, 0, sizeof (HostCallbackInfo));
 472         info.hostUserData = this;
 473         info.beatAndTempoProc = _get_beat_and_tempo_callback;
 474         info.musicalTimeLocationProc = _get_musical_time_location_callback;
 475         info.transportStateProc = _get_transport_state_callback;
 476
 477         //ignore result of this - don't care if the property isn't supported
 478         TRACE_API ("set host callbacks in global scope\n");
 479         unit->SetProperty (kAudioUnitProperty_HostCallbacks,
 480                            kAudioUnitScope_Global,
 481                            0, //elementID
 482                            &info,
 483                            sizeof (HostCallbackInfo));
 484
 485         /* these keep track of *configured* channel set up,
 486            not potential set ups.
 487         */
 488
 489         input_channels = -1;
 490         output_channels = -1;
 491
 492         if (set_block_size (_session.get_block_size())) {
 493                 error << _("AUPlugin: cannot set processing block size") << endmsg;
 494                 throw failed_constructor();
 495         }
 496
 497         AUPluginInfoPtr pinfo = boost::dynamic_pointer_cast<AUPluginInfo>(get_info());
 498         _has_midi_input = pinfo->needs_midi_input ();
 499         _has_midi_output = false;
 500
 501         discover_parameters ();
 502         discover_factory_presets ();
 503
 504         // Plugin::setup_controls ();
 505 }
 506
 507 void
 508 AUPlugin::discover_parameters ()
 509 {
 510         /* discover writable parameters */
 511
 512         AudioUnitScope scopes[] = {
 513                 kAudioUnitScope_Global,
 514                 kAudioUnitScope_Output,
 515                 kAudioUnitScope_Input
 516         };
 517
 518         descriptors.clear ();
 519
 520         for (uint32_t i = 0; i < sizeof (scopes) / sizeof (scopes[0]); ++i) {
 521
 522                 AUParamInfo param_info (unit->AU(), false, false, scopes[i]);
 523
 524                 for (uint32_t i = 0; i < param_info.NumParams(); ++i) {
 525
 526                         AUParameterDescriptor d;
 527
 528                         d.id = param_info.ParamID (i);
 529
 530                         const CAAUParameter* param = param_info.GetParamInfo (d.id);
 531                         const AudioUnitParameterInfo& info (param->ParamInfo());
 532
 533                         const int len = CFStringGetLength (param->GetName());;
 534                         char local_buffer[len*2];
 535                         Boolean good = CFStringGetCString(param->GetName(),local_buffer,len*2,kCFStringEncodingMacRoman);
 536                         if (!good) {
 537                                 d.label = "???";
 538                         } else {
 539                                 d.label = local_buffer;
 540                         }
 541
 542                         d.scope = param_info.GetScope ();
 543                         d.element = param_info.GetElement ();
 544
 545                         /* info.units to consider */
 546                         /*
 547                           kAudioUnitParameterUnit_Generic             = 0
 548                           kAudioUnitParameterUnit_Indexed             = 1
 549                           kAudioUnitParameterUnit_Boolean             = 2
 550                           kAudioUnitParameterUnit_Percent             = 3
 551                           kAudioUnitParameterUnit_Seconds             = 4
 552                           kAudioUnitParameterUnit_SampleFrames        = 5
 553                           kAudioUnitParameterUnit_Phase               = 6
 554                           kAudioUnitParameterUnit_Rate                = 7
 555                           kAudioUnitParameterUnit_Hertz               = 8
 556                           kAudioUnitParameterUnit_Cents               = 9
 557                           kAudioUnitParameterUnit_RelativeSemiTones   = 10
 558                           kAudioUnitParameterUnit_MIDINoteNumber      = 11
 559                           kAudioUnitParameterUnit_MIDIController      = 12
 560                           kAudioUnitParameterUnit_Decibels            = 13
 561                           kAudioUnitParameterUnit_LinearGain          = 14
 562                           kAudioUnitParameterUnit_Degrees             = 15
 563                           kAudioUnitParameterUnit_EqualPowerCrossfade = 16
 564                           kAudioUnitParameterUnit_MixerFaderCurve1    = 17
 565                           kAudioUnitParameterUnit_Pan                 = 18
 566                           kAudioUnitParameterUnit_Meters              = 19
 567                           kAudioUnitParameterUnit_AbsoluteCents       = 20
 568                           kAudioUnitParameterUnit_Octaves             = 21
 569                           kAudioUnitParameterUnit_BPM                 = 22
 570                           kAudioUnitParameterUnit_Beats               = 23
 571                           kAudioUnitParameterUnit_Milliseconds        = 24
 572                           kAudioUnitParameterUnit_Ratio               = 25
 573                         */
 574
 575                         /* info.flags to consider */
 576
 577                         /*
 578
 579                           kAudioUnitParameterFlag_CFNameRelease       = (1L << 4)
 580                           kAudioUnitParameterFlag_HasClump            = (1L << 20)
 581                           kAudioUnitParameterFlag_HasName             = (1L << 21)
 582                           kAudioUnitParameterFlag_DisplayLogarithmic  = (1L << 22)
 583                           kAudioUnitParameterFlag_IsHighResolution    = (1L << 23)
 584                           kAudioUnitParameterFlag_NonRealTime         = (1L << 24)
 585                           kAudioUnitParameterFlag_CanRamp             = (1L << 25)
 586                           kAudioUnitParameterFlag_ExpertMode          = (1L << 26)
 587                           kAudioUnitParameterFlag_HasCFNameString     = (1L << 27)
 588                           kAudioUnitParameterFlag_IsGlobalMeta        = (1L << 28)
 589                           kAudioUnitParameterFlag_IsElementMeta       = (1L << 29)
 590                           kAudioUnitParameterFlag_IsReadable          = (1L << 30)
 591                           kAudioUnitParameterFlag_IsWritable          = (1L << 31)
 592                         */
 593
 594                         d.lower = info.minValue;
 595                         d.upper = info.maxValue;
 596                         d.default_value = info.defaultValue;
 597
 598                         d.integer_step = (info.unit == kAudioUnitParameterUnit_Indexed);
 599                         d.toggled = (info.unit == kAudioUnitParameterUnit_Boolean) ||
 600                                 (d.integer_step && ((d.upper - d.lower) == 1.0));
 601                         d.sr_dependent = (info.unit == kAudioUnitParameterUnit_SampleFrames);
 602                         d.automatable = !d.toggled &&
 603                                 !(info.flags & kAudioUnitParameterFlag_NonRealTime) &&
 604                                 (info.flags & kAudioUnitParameterFlag_IsWritable);
 605
 606                         d.logarithmic = (info.flags & kAudioUnitParameterFlag_DisplayLogarithmic);
 607                         d.unit = info.unit;
 608
 609                         d.step = 1.0;
 610                         d.smallstep = 0.1;
 611                         d.largestep = 10.0;
 612                         d.min_unbound = 0; // lower is bound
 613                         d.max_unbound = 0; // upper is bound
 614
 615                         descriptors.push_back (d);
 616                 }
 617         }
 618 }
 619
 620
 621 static unsigned int
 622 four_ints_to_four_byte_literal (unsigned char n[4])
 623 {
 624         /* this is actually implementation dependent. sigh. this is what gcc
 625            and quite a few others do.
 626          */
 627         return ((n[0] << 24) + (n[1] << 16) + (n[2] << 8) + n[3]);
 628 }
 629
 630 std::string
 631 AUPlugin::maybe_fix_broken_au_id (const std::string& id)
 632 {
 633         if (isdigit (id[0])) {
 634                 return id;
 635         }
 636
 637         /* ID format is xxxx-xxxx-xxxx
 638            where x maybe \xNN or a printable character.
 639
 640            Split at the '-' and and process each part into an integer.
 641            Then put it back together.
 642         */
 643
 644
 645         unsigned char nascent[4];
 646         const char* cstr = id.c_str();
 647         const char* estr = cstr + id.size();
 648         uint32_t n[3];
 649         int in;
 650         int next_int;
 651         char short_buf[3];
 652         stringstream s;
 653
 654         in = 0;
 655         next_int = 0;
 656         short_buf[2] = '\0';
 657
 658         while (*cstr && next_int < 4) {
 659
 660                 if (*cstr == '\\') {
 661
 662                         if (estr - cstr < 3) {
 663
 664                                 /* too close to the end for \xNN parsing: treat as literal characters */
 665
 666                                 cerr << "Parse " << cstr << " as a literal \\" << endl;
 667                                 nascent[in] = *cstr;
 668                                 ++cstr;
 669                                 ++in;
 670
 671                         } else {
 672
 673                                 if (cstr[1] == 'x' && isxdigit (cstr[2]) && isxdigit (cstr[3])) {
 674
 675                                         /* parse \xNN */
 676
 677                                         memcpy (short_buf, &cstr[2], 2);
 678                                         nascent[in] = strtol (short_buf, NULL, 16);
 679                                         cstr += 4;
 680                                         ++in;
 681
 682                                 } else {
 683
 684                                         /* treat as literal characters */
 685                                         cerr << "Parse " << cstr << " as a literal \\" << endl;
 686                                         nascent[in] = *cstr;
 687                                         ++cstr;
 688                                         ++in;
 689                                 }
 690                         }
 691
 692                 } else {
 693
 694                         nascent[in] = *cstr;
 695                         ++cstr;
 696                         ++in;
 697                 }
 698
 699                 if (in && (in % 4 == 0)) {
 700                         /* nascent is ready */
 701                         n[next_int] = four_ints_to_four_byte_literal (nascent);
 702                         in = 0;
 703                         next_int++;
 704
 705                         /* swallow space-hyphen-space */
 706
 707                         if (next_int < 3) {
 708                                 ++cstr;
 709                                 ++cstr;
 710                                 ++cstr;
 711                         }
 712                 }
 713         }
 714
 715         if (next_int != 3) {
 716                 goto err;
 717         }
 718
 719         s << n[0] << '-' << n[1] << '-' << n[2];
 720
 721         return s.str();
 722
 723   err:
 724         return string();
 725 }
 726
 727 string
 728 AUPlugin::unique_id () const
 729 {
 730         return AUPluginInfo::stringify_descriptor (comp->Desc());
 731 }
 732
 733 const char *
 734 AUPlugin::label () const
 735 {
 736         return _info->name.c_str();
 737 }
 738
 739 uint32_t
 740 AUPlugin::parameter_count () const
 741 {
 742         return descriptors.size();
 743 }
 744
 745 float
 746 AUPlugin::default_value (uint32_t port)
 747 {
 748         if (port < descriptors.size()) {
 749                 return descriptors[port].default_value;
 750         }
 751
 752         return 0;
 753 }
 754
 755 framecnt_t
 756 AUPlugin::signal_latency () const
 757 {
 758         return unit->Latency() * _session.frame_rate();
 759 }
 760
 761 void
 762 AUPlugin::set_parameter (uint32_t which, float val)
 763 {
 764         if (which >= descriptors.size()) {
 765                 return;
 766         }
 767
 768         const AUParameterDescriptor& d (descriptors[which]);
 769         TRACE_API ("set parameter %d in scope %d element %d to %f\n", d.id, d.scope, d.element, val);
 770         unit->SetParameter (d.id, d.scope, d.element, val);
 771
 772         /* tell the world what we did */
 773
 774         AudioUnitEvent theEvent;
 775
 776         theEvent.mEventType = kAudioUnitEvent_ParameterValueChange;
 777         theEvent.mArgument.mParameter.mAudioUnit = unit->AU();
 778         theEvent.mArgument.mParameter.mParameterID = d.id;
 779         theEvent.mArgument.mParameter.mScope = d.scope;
 780         theEvent.mArgument.mParameter.mElement = d.element;
 781
 782         TRACE_API ("notify about parameter change\n");
 783         AUEventListenerNotify (NULL, NULL, &theEvent);
 784
 785         Plugin::set_parameter (which, val);
 786 }
 787
 788 float
 789 AUPlugin::get_parameter (uint32_t which) const
 790 {
 791         float val = 0.0;
 792         if (which < descriptors.size()) {
 793                 const AUParameterDescriptor& d (descriptors[which]);
 794                 TRACE_API ("get value of parameter %d in scope %d element %d\n", d.id, d.scope, d.element);
 795                 unit->GetParameter(d.id, d.scope, d.element, val);
 796         }
 797         return val;
 798 }
 799
 800 int
 801 AUPlugin::get_parameter_descriptor (uint32_t which, ParameterDescriptor& pd) const
 802 {
 803         if (which < descriptors.size()) {
 804                 pd = descriptors[which];
 805                 return 0;
 806         }
 807         return -1;
 808 }
 809
 810 uint32_t
 811 AUPlugin::nth_parameter (uint32_t which, bool& ok) const
 812 {
 813         if (which < descriptors.size()) {
 814                 ok = true;
 815                 return which;
 816         }
 817         ok = false;
 818         return 0;
 819 }
 820
 821 void
 822 AUPlugin::activate ()
 823 {
 824         if (!initialized) {
 825                 OSErr err;
 826                 TRACE_API ("call Initialize in activate()\n");
 827                 if ((err = unit->Initialize()) != noErr) {
 828                         error << string_compose (_("AUPlugin: %1 cannot initialize plugin (err = %2)"), name(), err) << endmsg;
 829                 } else {
 830                         frames_processed = 0;
 831                         initialized = true;
 832                 }
 833         }
 834 }
 835
 836 void
 837 AUPlugin::deactivate ()
 838 {
 839         TRACE_API ("call Uninitialize in deactivate()\n");
 840         unit->Uninitialize ();
 841         initialized = false;
 842 }
 843
 844 void
 845 AUPlugin::flush ()
 846 {
 847         TRACE_API ("call Reset in flush()\n");
 848         unit->GlobalReset ();
 849 }
 850
 851 bool
 852 AUPlugin::requires_fixed_size_buffers() const
 853 {
 854         return _requires_fixed_size_buffers;
 855 }
 856
 857
 858 int
 859 AUPlugin::set_block_size (pframes_t nframes)
 860 {
 861         bool was_initialized = initialized;
 862         UInt32 numFrames = nframes;
 863         OSErr err;
 864
 865         if (initialized) {
 866                 deactivate ();
 867         }
 868
 869         TRACE_API ("set MaximumFramesPerSlice in global scope to %u\n", numFrames);
 870         if ((err = unit->SetProperty (kAudioUnitProperty_MaximumFramesPerSlice, kAudioUnitScope_Global,
 871                                       0, &numFrames, sizeof (numFrames))) != noErr) {
 872                 cerr << "cannot set max frames (err = " << err << ')' << endl;
 873                 return -1;
 874         }
 875
 876         if (was_initialized) {
 877                 activate ();
 878         }
 879
 880         _current_block_size = nframes;
 881
 882         return 0;
 883 }
 884
 885 bool
 886 AUPlugin::configure_io (ChanCount in, ChanCount out)
 887 {
 888         AudioStreamBasicDescription streamFormat;
 889         bool was_initialized = initialized;
 890         int32_t audio_in = in.n_audio();
 891         int32_t audio_out = out.n_audio();
 892
 893         if (initialized) {
 894                 //if we are already running with the requested i/o config, bail out here
 895                 if ( (audio_in==input_channels) && (audio_out==output_channels) ) {
 896                         return 0;
 897                 } else {
 898                         deactivate ();
 899                 }
 900         }
 901
 902         streamFormat.mSampleRate = _session.frame_rate();
 903         streamFormat.mFormatID = kAudioFormatLinearPCM;
 904         streamFormat.mFormatFlags = kAudioFormatFlagIsFloat|kAudioFormatFlagIsPacked|kAudioFormatFlagIsNonInterleaved;
 905
 906 #ifdef __LITTLE_ENDIAN__
 907         /* relax */
 908 #else
 909         streamFormat.mFormatFlags |= kAudioFormatFlagIsBigEndian;
 910 #endif
 911
 912         streamFormat.mBitsPerChannel = 32;
 913         streamFormat.mFramesPerPacket = 1;
 914
 915         /* apple says that for non-interleaved data, these
 916            values always refer to a single channel.
 917         */
 918         streamFormat.mBytesPerPacket = 4;
 919         streamFormat.mBytesPerFrame = 4;
 920
 921         streamFormat.mChannelsPerFrame = audio_in;
 922
 923         if (set_input_format (streamFormat) != 0) {
 924                 return -1;
 925         }
 926
 927         streamFormat.mChannelsPerFrame = audio_out;
 928
 929         if (set_output_format (streamFormat) != 0) {
 930                 return -1;
 931         }
 932
 933         if (was_initialized) {
 934                 activate ();
 935         }
 936
 937         return 0;
 938 }
 939
 940 bool
 941 AUPlugin::can_support_io_configuration (const ChanCount& in, ChanCount& out) const
 942 {
 943         // XXX as of May 13th 2008, AU plugin support returns a count of either 1 or -1. We never
 944         // attempt to multiply-instantiate plugins to meet io configurations.
 945
 946         int32_t audio_in = in.n_audio();
 947         int32_t audio_out;
 948         int32_t plugcnt = -1;
 949         AUPluginInfoPtr pinfo = boost::dynamic_pointer_cast<AUPluginInfo>(get_info());
 950
 951         /* lets check MIDI first */
 952
 953         if (in.n_midi() > 0) {
 954                 if (!_has_midi_input) {
 955                         return false;
 956                 }
 957         }
 958
 959         vector<pair<int,int> >& io_configs = pinfo->cache.io_configs;
 960
 961         if (debug_io_config) {
 962                 cerr << name() << " has " << io_configs.size() << " IO Configurations\n";
 963         }
 964
 965         //Ardour expects the plugin to tell it the output configuration
 966         //but AU plugins can have multiple I/O configurations
 967         //in most cases (since we don't allow special routing like sidechains in A2, we want to preserve the number of streams
 968         //so first lets see if there's a configuration that keeps out==in
 969
 970         audio_out = audio_in;
 971
 972         for (vector<pair<int,int> >::iterator i = io_configs.begin(); i != io_configs.end(); ++i) {
 973                 int32_t possible_in = i->first;
 974                 int32_t possible_out = i->second;
 975
 976                 if (possible_in == audio_in && possible_out== audio_out) {
 977                         cerr << "\tCHOSEN: in " << in << " out " << out << endl;
 978                         return 1;
 979                 }
 980         }
 981
 982         /* now allow potentially "imprecise" matches */
 983         audio_out = -1;
 984         for (vector<pair<int,int> >::iterator i = io_configs.begin(); i != io_configs.end(); ++i) {
 985
 986                 int32_t possible_in = i->first;
 987                 int32_t possible_out = i->second;
 988
 989                 if (debug_io_config) {
 990                         cerr << "\tin " << possible_in << " out " << possible_out << endl;
 991                 }
 992
 993                 if (possible_out == 0) {
 994                         warning << string_compose (_("AU %1 has zero outputs - configuration ignored"), name()) << endmsg;
 995                         continue;
 996                 }
 997
 998                 if (possible_in == 0) {
 999
1000                         /* instrument plugin, always legal but throws away inputs ...
1001                         */
1002
1003                         if (possible_out == -1) {
1004                                 /* out much match in (UNLIKELY!!) */
1005                                 audio_out = audio_in;
1006                                 plugcnt = 1;
1007                         } else if (possible_out == -2) {
1008                                 /* any configuration possible, pick matching */
1009                                 audio_out = audio_in;
1010                                 plugcnt = 1;
1011                         } else if (possible_out < -2) {
1012                                 /* explicit variable number of outputs, pick maximum */
1013                                 audio_out = -possible_out;
1014                                 plugcnt = 1;
1015                         } else {
1016                                 /* exact number of outputs */
1017                                 audio_out = possible_out;
1018                                 plugcnt = 1;
1019                         }
1020                 }
1021
1022                 if (possible_in == -1) {
1023
1024                         /* wildcard for input */
1025
1026                         if (possible_out == -1) {
1027                                 /* out much match in */
1028                                 audio_out = audio_in;
1029                                 plugcnt = 1;
1030                         } else if (possible_out == -2) {
1031                                 /* any configuration possible, pick matching */
1032                                 audio_out = audio_in;
1033                                 plugcnt = 1;
1034                         } else if (possible_out < -2) {
1035                                 /* explicit variable number of outputs, pick maximum */
1036                                 audio_out = -possible_out;
1037                                 plugcnt = 1;
1038                         } else {
1039                                 /* exact number of outputs */
1040                                 audio_out = possible_out;
1041                                 plugcnt = 1;
1042                         }
1043                 }
1044
1045                 if (possible_in == -2) {
1046
1047                         if (possible_out == -1) {
1048                                 /* any configuration possible, pick matching */
1049                                 audio_out = audio_in;
1050                                 plugcnt = 1;
1051                         } else if (possible_out == -2) {
1052                                 error << string_compose (_("AU plugin %1 has illegal IO configuration (-2,-2)"), name())
1053                                       << endmsg;
1054                                 plugcnt = -1;
1055                         } else if (possible_out < -2) {
1056                                 /* explicit variable number of outputs, pick maximum */
1057                                 audio_out = -possible_out;
1058                                 plugcnt = 1;
1059                         } else {
1060                                 /* exact number of outputs */
1061                                 audio_out = possible_out;
1062                                 plugcnt = 1;
1063                         }
1064                 }
1065
1066                 if (possible_in < -2) {
1067
1068                         /* explicit variable number of inputs */
1069
1070                         if (audio_in > -possible_in) {
1071                                 /* request is too large */
1072                                 plugcnt = -1;
1073                         }
1074
1075                         if (possible_out == -1) {
1076                                 /* out must match in */
1077                                 audio_out = audio_in;
1078                                 plugcnt = 1;
1079                         } else if (possible_out == -2) {
1080                                 error << string_compose (_("AU plugin %1 has illegal IO configuration (-2,-2)"), name())
1081                                       << endmsg;
1082                                 plugcnt = -1;
1083                         } else if (possible_out < -2) {
1084                                 /* explicit variable number of outputs, pick maximum */
1085                                 audio_out = -possible_out;
1086                                 plugcnt = 1;
1087                         } else {
1088                                 /* exact number of outputs */
1089                                 audio_out = possible_out;
1090                                 plugcnt = 1;
1091                         }
1092                 }
1093
1094                 if (possible_in == audio_in) {
1095
1096                         /* exact number of inputs ... must match obviously */
1097
1098                         if (possible_out == -1) {
1099                                 /* out must match in */
1100                                 audio_out = audio_in;
1101                                 plugcnt = 1;
1102                         } else if (possible_out == -2) {
1103                                 /* any output configuration, pick matching */
1104                                 audio_out = audio_in;
1105                                 plugcnt = -1;
1106                         } else if (possible_out < -2) {
1107                                 /* explicit variable number of outputs, pick maximum */
1108                                 audio_out = -possible_out;
1109                                 plugcnt = 1;
1110                         } else {
1111                                 /* exact number of outputs */
1112                                 audio_out = possible_out;
1113                                 plugcnt = 1;
1114                         }
1115                 }
1116
1117                 if (plugcnt == 1) {
1118                         break;
1119                 }
1120
1121         }
1122
1123         if (debug_io_config) {
1124                 if (plugcnt > 0) {
1125                         cerr << "\tCHOSEN: in " << in << " out " << out << " plugcnt will be " << plugcnt << endl;
1126                 } else {
1127                         cerr << "\tFAIL: no configs match requested in " << in << endl;
1128                 }
1129         }
1130
1131         out.set (DataType::MIDI, 0);
1132         out.set (DataType::AUDIO, audio_out);
1133
1134         return plugcnt;
1135 }
1136
1137 int
1138 AUPlugin::set_input_format (AudioStreamBasicDescription& fmt)
1139 {
1140         return set_stream_format (kAudioUnitScope_Input, input_elements, fmt);
1141 }
1142
1143 int
1144 AUPlugin::set_output_format (AudioStreamBasicDescription& fmt)
1145 {
1146         if (set_stream_format (kAudioUnitScope_Output, output_elements, fmt) != 0) {
1147                 return -1;
1148         }
1149
1150         if (buffers) {
1151                 free (buffers);
1152                 buffers = 0;
1153         }
1154
1155         buffers = (AudioBufferList *) malloc (offsetof(AudioBufferList, mBuffers) +
1156                                               fmt.mChannelsPerFrame * sizeof(::AudioBuffer));
1157
1158         Glib::Mutex::Lock em (_session.engine().process_lock());
1159         IO::PortCountChanged (ChanCount(DataType::AUDIO, fmt.mChannelsPerFrame));
1160
1161         return 0;
1162 }
1163
1164 int
1165 AUPlugin::set_stream_format (int scope, uint32_t cnt, AudioStreamBasicDescription& fmt)
1166 {
1167         OSErr result;
1168
1169         for (uint32_t i = 0; i < cnt; ++i) {
1170                 TRACE_API ("set stream format for %s, scope = %d element %d\n",
1171                            (scope == kAudioUnitScope_Input ? "input" : "output"),
1172                            scope, cnt);
1173                 if ((result = unit->SetFormat (scope, i, fmt)) != 0) {
1174                         error << string_compose (_("AUPlugin: could not set stream format for %1/%2 (err = %3)"),
1175                                                  (scope == kAudioUnitScope_Input ? "input" : "output"), i, result) << endmsg;
1176                         return -1;
1177                 }
1178         }
1179
1180         if (scope == kAudioUnitScope_Input) {
1181                 input_channels = fmt.mChannelsPerFrame;
1182         } else {
1183                 output_channels = fmt.mChannelsPerFrame;
1184         }
1185
1186         return 0;
1187 }
1188
1189 OSStatus
1190 AUPlugin::render_callback(AudioUnitRenderActionFlags*,
1191                           const AudioTimeStamp*,
1192                           UInt32,
1193                           UInt32       inNumberFrames,
1194                           AudioBufferList*       ioData)
1195 {
1196         if (_has_midi_input) {
1197                 assert (current_buffers->count().n_midi() > 0);
1198
1199                 /* deliver the first (and assumed only) MIDI buffer's data
1200                    to the plugin
1201                 */
1202
1203                 MidiBuffer& mb (current_buffers->get_midi(0));
1204
1205                 for (MidiBuffer::iterator i = mb.begin(); i != mb.end(); ++i) {
1206                         Evoral::MIDIEvent<MidiBuffer::TimeType> ev = *i;
1207                         switch (ev.type()) {
1208                         case MIDI_CMD_NOTE_ON:
1209                         case MIDI_CMD_NOTE_OFF:
1210                         case MIDI_CMD_CONTROL:
1211                         case MIDI_CMD_BENDER:
1212                         case MIDI_CMD_PGM_CHANGE:
1213                         case MIDI_CMD_CHANNEL_PRESSURE:
1214                         {
1215                                 const uint8_t* b = ev.buffer();
1216                                 unit->MIDIEvent (b[0], b[1], b[2], ev.time());
1217                                 break;
1218                         }
1219
1220                         default:
1221                                 /* plugins do not get other stuff by default */
1222                                 break;
1223                         };
1224                 }
1225         }
1226
1227         /* not much to do with audio - the data is already in the buffers given to us in connect_and_run() */
1228
1229         if (current_maxbuf == 0) {
1230                 error << _("AUPlugin: render callback called illegally!") << endmsg;
1231                 return kAudioUnitErr_CannotDoInCurrentContext;
1232         }
1233         uint32_t limit = min ((uint32_t) ioData->mNumberBuffers, current_maxbuf);
1234
1235         for (uint32_t i = 0; i < limit; ++i) {
1236                 ioData->mBuffers[i].mNumberChannels = 1;
1237                 ioData->mBuffers[i].mDataByteSize = sizeof (Sample) * inNumberFrames;
1238
1239                 /* we don't use the channel mapping because audiounits are
1240                    never replicated. one plugin instance uses all channels/buffers
1241                    passed to PluginInsert::connect_and_run()
1242                 */
1243
1244                 ioData->mBuffers[i].mData = current_buffers->get_audio (i).data (cb_offset + current_offset);
1245         }
1246
1247         cb_offset += inNumberFrames;
1248
1249         return noErr;
1250 }
1251
1252 int
1253 AUPlugin::connect_and_run (BufferSet& bufs, ChanMapping in_map, ChanMapping out_map, pframes_t nframes, framecnt_t offset)
1254 {
1255         Plugin::connect_and_run (bufs, in_map, out_map, nframes, offset);
1256
1257         AudioUnitRenderActionFlags flags = 0;
1258         AudioTimeStamp ts;
1259         OSErr err;
1260         uint32_t maxbuf = bufs.count().n_audio();
1261
1262         if (requires_fixed_size_buffers() && (nframes != _last_nframes)) {
1263                 unit->GlobalReset();
1264                 _last_nframes = nframes;
1265         }
1266
1267         current_buffers = &bufs;
1268         current_maxbuf = maxbuf;
1269         current_offset = offset;
1270         cb_offset = 0;
1271
1272         buffers->mNumberBuffers = min ((uint32_t) output_channels, maxbuf);
1273
1274         for (uint32_t i = 0; i < buffers->mNumberBuffers; ++i) {
1275                 buffers->mBuffers[i].mNumberChannels = 1;
1276                 buffers->mBuffers[i].mDataByteSize = nframes * sizeof (Sample);
1277                 buffers->mBuffers[i].mData = 0;
1278         }
1279
1280         ts.mSampleTime = frames_processed;
1281         ts.mFlags = kAudioTimeStampSampleTimeValid;
1282
1283         if ((err = unit->Render (&flags, &ts, 0, nframes, buffers)) == noErr) {
1284
1285                 current_maxbuf = 0;
1286                 frames_processed += nframes;
1287
1288                 uint32_t limit = min ((uint32_t) buffers->mNumberBuffers, maxbuf);
1289                 uint32_t i;
1290
1291                 for (i = 0; i < limit; ++i) {
1292                         Sample* expected_buffer_address= bufs.get_audio (i).data (offset);
1293                         if (expected_buffer_address != buffers->mBuffers[i].mData) {
1294                                 // cerr << "chn " << i << " rendered into " << bufs[i]+offset << endl;
1295                                 memcpy (expected_buffer_address, buffers->mBuffers[i].mData, nframes * sizeof (Sample));
1296                         }
1297                 }
1298
1299                 /* now silence any buffers that were passed in but the that the plugin
1300                    did not fill/touch/use.
1301                 */
1302
1303                 for (;i < maxbuf; ++i) {
1304                         Sample* buffer_address= bufs.get_audio (i).data (offset);
1305                         memset (buffer_address, 0, nframes * sizeof (Sample));
1306                 }
1307
1308                 return 0;
1309         }
1310
1311         cerr << name() << " render status " << err << endl;
1312         return -1;
1313 }
1314
1315 OSStatus
1316 AUPlugin::get_beat_and_tempo_callback (Float64* outCurrentBeat,
1317                                        Float64* outCurrentTempo)
1318 {
1319         TempoMap& tmap (_session.tempo_map());
1320
1321         TRACE_API ("AU calls ardour beat&tempo callback\n");
1322
1323         /* more than 1 meter or more than 1 tempo means that a simplistic computation
1324            (and interpretation) of a beat position will be incorrect. So refuse to
1325            offer the value.
1326         */
1327
1328         if (tmap.n_tempos() > 1 || tmap.n_meters() > 1) {
1329                 return kAudioUnitErr_CannotDoInCurrentContext;
1330         }
1331
1332         Timecode::BBT_Time bbt;
1333         TempoMetric metric = tmap.metric_at (_session.transport_frame() + current_offset);
1334         tmap.bbt_time_with_metric (_session.transport_frame() + current_offset, bbt, metric);
1335
1336         if (outCurrentBeat) {
1337                 float beat;
1338                 beat = metric.meter().beats_per_bar() * bbt.bars;
1339                 beat += bbt.beats;
1340                 beat += bbt.ticks / BBT_Time::ticks_per_beat;
1341                 *outCurrentBeat = beat;
1342         }
1343
1344         if (outCurrentTempo) {
1345                 *outCurrentTempo = floor (metric.tempo().beats_per_minute());
1346         }
1347
1348         return noErr;
1349
1350 }
1351
1352 OSStatus
1353 AUPlugin::get_musical_time_location_callback (UInt32*   outDeltaSampleOffsetToNextBeat,
1354                                               Float32*  outTimeSig_Numerator,
1355                                               UInt32*   outTimeSig_Denominator,
1356                                               Float64*  outCurrentMeasureDownBeat)
1357 {
1358         TempoMap& tmap (_session.tempo_map());
1359
1360         TRACE_API ("AU calls ardour music time location callback\n");
1361
1362         /* more than 1 meter or more than 1 tempo means that a simplistic computation
1363            (and interpretation) of a beat position will be incorrect. So refuse to
1364            offer the value.
1365         */
1366
1367         if (tmap.n_tempos() > 1 || tmap.n_meters() > 1) {
1368                 return kAudioUnitErr_CannotDoInCurrentContext;
1369         }
1370
1371         Timecode::BBT_Time bbt;
1372         TempoMetric metric = tmap.metric_at (_session.transport_frame() + current_offset);
1373         tmap.bbt_time_with_metric (_session.transport_frame() + current_offset, bbt, metric);
1374
1375         if (outDeltaSampleOffsetToNextBeat) {
1376                 if (bbt.ticks == 0) {
1377                         /* on the beat */
1378                         *outDeltaSampleOffsetToNextBeat = 0;
1379                 } else {
1380                         *outDeltaSampleOffsetToNextBeat = (UInt32) floor (((BBT_Time::ticks_per_beat - bbt.ticks)/BBT_Time::ticks_per_beat) * // fraction of a beat to next beat
1381                                                                           metric.tempo().frames_per_beat(_session.frame_rate(), metric.meter())); // frames per beat
1382                 }
1383         }
1384
1385         if (outTimeSig_Numerator) {
1386                 *outTimeSig_Numerator = (UInt32) lrintf (metric.meter().beats_per_bar());
1387         }
1388         if (outTimeSig_Denominator) {
1389                 *outTimeSig_Denominator = (UInt32) lrintf (metric.meter().note_divisor());
1390         }
1391
1392         if (outCurrentMeasureDownBeat) {
1393
1394                 /* beat for the start of the bar.
1395                    1|1|0 -> 1
1396                    2|1|0 -> 1 + beats_per_bar
1397                    3|1|0 -> 1 + (2 * beats_per_bar)
1398                    etc.
1399                 */
1400
1401                 *outCurrentMeasureDownBeat = 1 + metric.meter().beats_per_bar() * (bbt.bars - 1);
1402         }
1403
1404         return noErr;
1405 }
1406
1407 OSStatus
1408 AUPlugin::get_transport_state_callback (Boolean*  outIsPlaying,
1409                                         Boolean*  outTransportStateChanged,
1410                                         Float64*  outCurrentSampleInTimeLine,
1411                                         Boolean*  outIsCycling,
1412                                         Float64*  outCycleStartBeat,
1413                                         Float64*  outCycleEndBeat)
1414 {
1415         bool rolling;
1416         float speed;
1417
1418         TRACE_API ("AU calls ardour transport state callback\n");
1419
1420         rolling = _session.transport_rolling();
1421         speed = _session.transport_speed ();
1422
1423         if (outIsPlaying) {
1424                 *outIsPlaying = _session.transport_rolling();
1425         }
1426
1427         if (outTransportStateChanged) {
1428                 if (rolling != last_transport_rolling) {
1429                         *outTransportStateChanged = true;
1430                 } else if (speed != last_transport_speed) {
1431                         *outTransportStateChanged = true;
1432                 } else {
1433                         *outTransportStateChanged = false;
1434                 }
1435         }
1436
1437         if (outCurrentSampleInTimeLine) {
1438                 /* this assumes that the AU can only call this host callback from render context,
1439                    where current_offset is valid.
1440                 */
1441                 *outCurrentSampleInTimeLine = _session.transport_frame() + current_offset;
1442         }
1443
1444         if (outIsCycling) {
1445                 Location* loc = _session.locations()->auto_loop_location();
1446
1447                 *outIsCycling = (loc && _session.transport_rolling() && _session.get_play_loop());
1448
1449                 if (*outIsCycling) {
1450
1451                         if (outCycleStartBeat || outCycleEndBeat) {
1452
1453                                 TempoMap& tmap (_session.tempo_map());
1454
1455                                 /* more than 1 meter means that a simplistic computation (and interpretation) of
1456                                    a beat position will be incorrect. so refuse to offer the value.
1457                                 */
1458
1459                                 if (tmap.n_meters() > 1) {
1460                                         return kAudioUnitErr_CannotDoInCurrentContext;
1461                                 }
1462
1463                                 Timecode::BBT_Time bbt;
1464
1465                                 if (outCycleStartBeat) {
1466                                         TempoMetric metric = tmap.metric_at (loc->start() + current_offset);
1467                                         _session.tempo_map().bbt_time_with_metric (loc->start(), bbt, metric);
1468
1469                                         float beat;
1470                                         beat = metric.meter().beats_per_bar() * bbt.bars;
1471                                         beat += bbt.beats;
1472                                         beat += bbt.ticks / BBT_Time::ticks_per_beat;
1473
1474                                         *outCycleStartBeat = beat;
1475                                 }
1476
1477                                 if (outCycleEndBeat) {
1478                                         TempoMetric metric = tmap.metric_at (loc->end() + current_offset);
1479                                         _session.tempo_map().bbt_time_with_metric (loc->end(), bbt, metric);
1480
1481                                         float beat;
1482                                         beat = metric.meter().beats_per_bar() * bbt.bars;
1483                                         beat += bbt.beats;
1484                                         beat += bbt.ticks / BBT_Time::ticks_per_beat;
1485
1486                                         *outCycleEndBeat = beat;
1487                                 }
1488                         }
1489                 }
1490         }
1491
1492         last_transport_rolling = rolling;
1493         last_transport_speed = speed;
1494
1495         return noErr;
1496 }
1497
1498 set<Evoral::Parameter>
1499 AUPlugin::automatable() const
1500 {
1501         set<Evoral::Parameter> automates;
1502
1503         for (uint32_t i = 0; i < descriptors.size(); ++i) {
1504                 if (descriptors[i].automatable) {
1505                         automates.insert (automates.end(), Evoral::Parameter (PluginAutomation, 0, i));
1506                 }
1507         }
1508
1509         return automates;
1510 }
1511
1512 string
1513 AUPlugin::describe_parameter (Evoral::Parameter param)
1514 {
1515         if (param.type() == PluginAutomation && param.id() < parameter_count()) {
1516                 return descriptors[param.id()].label;
1517         } else {
1518                 return "??";
1519         }
1520 }
1521
1522 void
1523 AUPlugin::print_parameter (uint32_t /*param*/, char* /*buf*/, uint32_t /*len*/) const
1524 {
1525         // NameValue stuff here
1526 }
1527
1528 bool
1529 AUPlugin::parameter_is_audio (uint32_t) const
1530 {
1531         return false;
1532 }
1533
1534 bool
1535 AUPlugin::parameter_is_control (uint32_t) const
1536 {
1537         return true;
1538 }
1539
1540 bool
1541 AUPlugin::parameter_is_input (uint32_t) const
1542 {
1543         return false;
1544 }
1545
1546 bool
1547 AUPlugin::parameter_is_output (uint32_t) const
1548 {
1549         return false;
1550 }
1551
1552 void
1553 AUPlugin::add_state (XMLNode* root)
1554 {
1555         LocaleGuard lg (X_("POSIX"));
1556
1557 #ifdef AU_STATE_SUPPORT
1558         CFDataRef xmlData;
1559         CFPropertyListRef propertyList;
1560
1561         TRACE_API ("get preset state\n");
1562         if (unit->GetAUPreset (propertyList) != noErr) {
1563                 return;
1564         }
1565
1566         // Convert the property list into XML data.
1567
1568         xmlData = CFPropertyListCreateXMLData( kCFAllocatorDefault, propertyList);
1569
1570         if (!xmlData) {
1571                 error << _("Could not create XML version of property list") << endmsg;
1572                 return *root;
1573         }
1574
1575         /* re-parse XML bytes to create a libxml++ XMLTree that we can merge into
1576            our state node. GACK!
1577         */
1578
1579         XMLTree t;
1580
1581         if (t.read_buffer (string ((const char*) CFDataGetBytePtr (xmlData), CFDataGetLength (xmlData)))) {
1582                 if (t.root()) {
1583                         root->add_child_copy (*t.root());
1584                 }
1585         }
1586
1587         CFRelease (xmlData);
1588         CFRelease (propertyList);
1589 #else
1590         if (!seen_get_state_message) {
1591                 info << string_compose (_("Saving AudioUnit settings is not supported in this build of %1. Consider paying for a newer version"),
1592                                         PROGRAM_NAME)
1593                      << endmsg;
1594                 seen_get_state_message = true;
1595         }
1596 #endif
1597 }
1598
1599 int
1600 AUPlugin::set_state(const XMLNode& node, int version)
1601 {
1602 #ifdef AU_STATE_SUPPORT
1603         int ret = -1;
1604         CFPropertyListRef propertyList;
1605         LocaleGuard lg (X_("POSIX"));
1606
1607         if (node.name() != state_node_name()) {
1608                 error << _("Bad node sent to AUPlugin::set_state") << endmsg;
1609                 return -1;
1610         }
1611
1612         if (node.children().empty()) {
1613                 return -1;
1614         }
1615
1616         XMLNode* top = node.children().front();
1617         XMLNode* copy = new XMLNode (*top);
1618
1619         XMLTree t;
1620         t.set_root (copy);
1621
1622         const string& xml = t.write_buffer ();
1623         CFDataRef xmlData = CFDataCreateWithBytesNoCopy (kCFAllocatorDefault, (UInt8*) xml.data(), xml.length(), kCFAllocatorNull);
1624         CFStringRef errorString;
1625
1626         propertyList = CFPropertyListCreateFromXMLData( kCFAllocatorDefault,
1627                                                         xmlData,
1628                                                         kCFPropertyListImmutable,
1629                                                         &errorString);
1630
1631         CFRelease (xmlData);
1632
1633         if (propertyList) {
1634                 TRACE_API ("set preset\n");
1635                 if (unit->SetAUPreset (propertyList) == noErr) {
1636                         ret = 0;
1637
1638                         /* tell the world */
1639
1640                         AudioUnitParameter changedUnit;
1641                         changedUnit.mAudioUnit = unit->AU();
1642                         changedUnit.mParameterID = kAUParameterListener_AnyParameter;
1643                         AUParameterListenerNotify (NULL, NULL, &changedUnit);
1644                 }
1645                 CFRelease (propertyList);
1646         }
1647
1648         Plugin::set_state (node, version);
1649         return ret;
1650 #else
1651         if (!seen_set_state_message) {
1652                 info << string_compose (_("Restoring AudioUnit settings is not supported in this build of %1. Consider paying for a newer version"),
1653                                         PROGRAM_NAME)
1654                      << endmsg;
1655         }
1656         return Plugin::set_state (node, version);
1657 #endif
1658 }
1659
1660 bool
1661 AUPlugin::load_preset (PluginRecord r)
1662 {
1663         Plugin::load_preset (r);
1664
1665 #ifdef AU_STATE_SUPPORT
1666         bool ret = false;
1667         CFPropertyListRef propertyList;
1668         Glib::ustring path;
1669         UserPresetMap::iterator ux;
1670         FactoryPresetMap::iterator fx;
1671
1672         /* look first in "user" presets */
1673
1674         if ((ux = user_preset_map.find (preset_label)) != user_preset_map.end()) {
1675
1676                 if ((propertyList = load_property_list (ux->second)) != 0) {
1677                         TRACE_API ("set preset from user presets\n");
1678                         if (unit->SetAUPreset (propertyList) == noErr) {
1679                                 ret = true;
1680
1681                                 /* tell the world */
1682
1683                                 AudioUnitParameter changedUnit;
1684                                 changedUnit.mAudioUnit = unit->AU();
1685                                 changedUnit.mParameterID = kAUParameterListener_AnyParameter;
1686                                 AUParameterListenerNotify (NULL, NULL, &changedUnit);
1687                         }
1688                         CFRelease(propertyList);
1689                 }
1690
1691         } else if ((fx = factory_preset_map.find (preset_label)) != factory_preset_map.end()) {
1692
1693                 AUPreset preset;
1694
1695                 preset.presetNumber = fx->second;
1696                 preset.presetName = CFStringCreateWithCString (kCFAllocatorDefault, fx->first.c_str(), kCFStringEncodingUTF8);
1697
1698                 TRACE_API ("set preset from factory presets\n");
1699
1700                 if (unit->SetPresentPreset (preset) == 0) {
1701                         ret = true;
1702
1703                         /* tell the world */
1704
1705                         AudioUnitParameter changedUnit;
1706                         changedUnit.mAudioUnit = unit->AU();
1707                         changedUnit.mParameterID = kAUParameterListener_AnyParameter;
1708                         AUParameterListenerNotify (NULL, NULL, &changedUnit);
1709                 }
1710         }
1711
1712         return ret;
1713 #else
1714         if (!seen_loading_message) {
1715                 info << string_compose (_("Loading AudioUnit presets is not supported in this build of %1. Consider paying for a newer version"),
1716                                         PROGRAM_NAME)
1717                      << endmsg;
1718                 seen_loading_message = true;
1719         }
1720         return true;
1721 #endif
1722 }
1723
1724 bool
1725 AUPlugin::save_preset (string preset_name)
1726 {
1727 #ifdef AU_STATE_SUPPORT
1728         CFPropertyListRef propertyList;
1729         vector<Glib::ustring> v;
1730         Glib::ustring user_preset_path;
1731         bool ret = true;
1732
1733         std::string m = maker();
1734         std::string n = name();
1735
1736         strip_whitespace_edges (m);
1737         strip_whitespace_edges (n);
1738
1739         v.push_back (Glib::get_home_dir());
1740         v.push_back ("Library");
1741         v.push_back ("Audio");
1742         v.push_back ("Presets");
1743         v.push_back (m);
1744         v.push_back (n);
1745
1746         user_preset_path = Glib::build_filename (v);
1747
1748         if (g_mkdir_with_parents (user_preset_path.c_str(), 0775) < 0) {
1749                 error << string_compose (_("Cannot create user plugin presets folder (%1)"), user_preset_path) << endmsg;
1750                 return false;
1751         }
1752
1753         TRACE_API ("get current preset\n");
1754         if (unit->GetAUPreset (propertyList) != noErr) {
1755                 return false;
1756         }
1757
1758         // add the actual preset name */
1759
1760         v.push_back (preset_name + preset_suffix);
1761
1762         // rebuild
1763
1764         user_preset_path = Glib::build_filename (v);
1765
1766         set_preset_name_in_plist (propertyList, preset_name);
1767
1768         if (save_property_list (propertyList, user_preset_path)) {
1769                 error << string_compose (_("Saving plugin state to %1 failed"), user_preset_path) << endmsg;
1770                 ret = false;
1771         }
1772
1773         CFRelease(propertyList);
1774
1775         return ret;
1776 #else
1777         if (!seen_saving_message) {
1778                 info << string_compose (_("Saving AudioUnit presets is not supported in this build of %1. Consider paying for a newer version"),
1779                                         PROGRAM_NAME)
1780                      << endmsg;
1781                 seen_saving_message = true;
1782         }
1783         return false;
1784 #endif
1785 }
1786
1787 //-----------------------------------------------------------------------------
1788 // this is just a little helper function used by GetAUComponentDescriptionFromPresetFile()
1789 static SInt32
1790 GetDictionarySInt32Value(CFDictionaryRef inAUStateDictionary, CFStringRef inDictionaryKey, Boolean * outSuccess)
1791 {
1792         CFNumberRef cfNumber;
1793         SInt32 numberValue = 0;
1794         Boolean dummySuccess;
1795
1796         if (outSuccess == NULL)
1797                 outSuccess = &dummySuccess;
1798         if ( (inAUStateDictionary == NULL) || (inDictionaryKey == NULL) )
1799         {
1800                 *outSuccess = FALSE;
1801                 return 0;
1802         }
1803
1804         cfNumber = (CFNumberRef) CFDictionaryGetValue(inAUStateDictionary, inDictionaryKey);
1805         if (cfNumber == NULL)
1806         {
1807                 *outSuccess = FALSE;
1808                 return 0;
1809         }
1810         *outSuccess = CFNumberGetValue(cfNumber, kCFNumberSInt32Type, &numberValue);
1811         if (*outSuccess)
1812                 return numberValue;
1813         else
1814                 return 0;
1815 }
1816
1817 static OSStatus
1818 GetAUComponentDescriptionFromStateData(CFPropertyListRef inAUStateData, ComponentDescription * outComponentDescription)
1819 {
1820         CFDictionaryRef auStateDictionary;
1821         ComponentDescription tempDesc = {0,0,0,0,0};
1822         SInt32 versionValue;
1823         Boolean gotValue;
1824
1825         if ( (inAUStateData == NULL) || (outComponentDescription == NULL) )
1826                 return paramErr;
1827
1828         // the property list for AU state data must be of the dictionary type
1829         if (CFGetTypeID(inAUStateData) != CFDictionaryGetTypeID()) {
1830                 return kAudioUnitErr_InvalidPropertyValue;
1831         }
1832
1833         auStateDictionary = (CFDictionaryRef)inAUStateData;
1834
1835         // first check to make sure that the version of the AU state data is one that we know understand
1836         // XXX should I really do this?  later versions would probably still hold these ID keys, right?
1837         versionValue = GetDictionarySInt32Value(auStateDictionary, CFSTR(kAUPresetVersionKey), &gotValue);
1838
1839         if (!gotValue) {
1840                 return kAudioUnitErr_InvalidPropertyValue;
1841         }
1842 #define kCurrentSavedStateVersion 0
1843         if (versionValue != kCurrentSavedStateVersion) {
1844                 return kAudioUnitErr_InvalidPropertyValue;
1845         }
1846
1847         // grab the ComponentDescription values from the AU state data
1848         tempDesc.componentType = (OSType) GetDictionarySInt32Value(auStateDictionary, CFSTR(kAUPresetTypeKey), NULL);
1849         tempDesc.componentSubType = (OSType) GetDictionarySInt32Value(auStateDictionary, CFSTR(kAUPresetSubtypeKey), NULL);
1850         tempDesc.componentManufacturer = (OSType) GetDictionarySInt32Value(auStateDictionary, CFSTR(kAUPresetManufacturerKey), NULL);
1851         // zero values are illegit for specific ComponentDescriptions, so zero for any value means that there was an error
1852         if ( (tempDesc.componentType == 0) || (tempDesc.componentSubType == 0) || (tempDesc.componentManufacturer == 0) )
1853                 return kAudioUnitErr_InvalidPropertyValue;
1854
1855         *outComponentDescription = tempDesc;
1856         return noErr;
1857 }
1858
1859
1860 static bool au_preset_filter (const string& str, void* arg)
1861 {
1862         /* Not a dotfile, has a prefix before a period, suffix is aupreset */
1863
1864         bool ret;
1865
1866         ret = (str[0] != '.' && str.length() > 9 && str.find (preset_suffix) == (str.length() - preset_suffix.length()));
1867
1868         if (ret && arg) {
1869
1870                 /* check the preset file path name against this plugin
1871                    ID. The idea is that all preset files for this plugin
1872                    include "<manufacturer>/<plugin-name>" in their path.
1873                 */
1874
1875                 Plugin* p = (Plugin *) arg;
1876                 string match = p->maker();
1877                 match += '/';
1878                 match += p->name();
1879
1880                 ret = str.find (match) != string::npos;
1881
1882                 if (ret == false) {
1883                         string m = p->maker ();
1884                         string n = p->name ();
1885                         strip_whitespace_edges (m);
1886                         strip_whitespace_edges (n);
1887                         match = m;
1888                         match += '/';
1889                         match += n;
1890
1891                         ret = str.find (match) != string::npos;
1892                 }
1893         }
1894
1895         return ret;
1896 }
1897
1898 bool
1899 check_and_get_preset_name (Component component, const string& pathstr, string& preset_name)
1900 {
1901         OSStatus status;
1902         CFPropertyListRef plist;
1903         ComponentDescription presetDesc;
1904         bool ret = false;
1905
1906         plist = load_property_list (pathstr);
1907
1908         if (!plist) {
1909                 return ret;
1910         }
1911
1912         // get the ComponentDescription from the AU preset file
1913
1914         status = GetAUComponentDescriptionFromStateData(plist, &presetDesc);
1915
1916         if (status == noErr) {
1917                 if (ComponentAndDescriptionMatch_Loosely(component, &presetDesc)) {
1918
1919                         /* try to get the preset name from the property list */
1920
1921                         if (CFGetTypeID(plist) == CFDictionaryGetTypeID()) {
1922
1923                                 const void* psk = CFDictionaryGetValue ((CFMutableDictionaryRef)plist, CFSTR(kAUPresetNameKey));
1924
1925                                 if (psk) {
1926
1927                                         const char* p = CFStringGetCStringPtr ((CFStringRef) psk, kCFStringEncodingUTF8);
1928
1929                                         if (!p) {
1930                                                 char buf[PATH_MAX+1];
1931
1932                                                 if (CFStringGetCString ((CFStringRef)psk, buf, sizeof (buf), kCFStringEncodingUTF8)) {
1933                                                         preset_name = buf;
1934                                                 }
1935                                         }
1936                                 }
1937                         }
1938                 }
1939         }
1940
1941         CFRelease (plist);
1942
1943         return true;
1944 }
1945
1946 std::string
1947 AUPlugin::current_preset() const
1948 {
1949         string preset_name;
1950
1951 #ifdef AU_STATE_SUPPORT
1952         CFPropertyListRef propertyList;
1953
1954         TRACE_API ("get current preset for current_preset()\n");
1955         if (unit->GetAUPreset (propertyList) == noErr) {
1956                 preset_name = get_preset_name_in_plist (propertyList);
1957                 CFRelease(propertyList);
1958         }
1959 #endif
1960         return preset_name;
1961 }
1962
1963 void
1964 AUPlugin::find_presets ()
1965 {
1966 #ifdef AU_STATE_SUPPORT
1967         vector<string*>* preset_files;
1968         PathScanner scanner;
1969
1970         user_preset_map.clear ();
1971
1972         preset_files = scanner (preset_search_path, au_preset_filter, this, true, true, -1, true);
1973
1974         if (!preset_files) {
1975                 return;
1976         }
1977
1978         for (vector<string*>::iterator x = preset_files->begin(); x != preset_files->end(); ++x) {
1979
1980                 string path = *(*x);
1981                 string preset_name;
1982
1983                 /* make an initial guess at the preset name using the path */
1984
1985                 preset_name = Glib::path_get_basename (path);
1986                 preset_name = preset_name.substr (0, preset_name.find_last_of ('.'));
1987
1988                 /* check that this preset file really matches this plugin
1989                    and potentially get the "real" preset name from
1990                    within the file.
1991                 */
1992
1993                 if (check_and_get_preset_name (get_comp()->Comp(), path, preset_name)) {
1994                         user_preset_map[preset_name] = path;
1995                 }
1996
1997                 delete *x;
1998         }
1999
2000         delete preset_files;
2001
2002         /* now fill the vector<string> with the names we have */
2003
2004         for (UserPresetMap::iterator i = user_preset_map.begin(); i != user_preset_map.end(); ++i) {
2005                 _presets.insert (i->second, Plugin::PresetRecord (i->second, i->first));
2006         }
2007
2008         /* add factory presets */
2009
2010         for (FactoryPresetMap::iterator i = factory_preset_map.begin(); i != factory_preset_map.end(); ++i) {
2011                 /* XXX: dubious */
2012                 string const uri = string_compose ("%1", _presets.size ());
2013                 _presets.push_back (uri, Plugin::PresetRecord (uri, i->first));
2014         }
2015
2016 #endif
2017 }
2018
2019 bool
2020 AUPlugin::has_editor () const
2021 {
2022         // even if the plugin doesn't have its own editor, the AU API can be used
2023         // to create one that looks native.
2024         return true;
2025 }
2026
2027 AUPluginInfo::AUPluginInfo (boost::shared_ptr<CAComponentDescription> d)
2028         : descriptor (d)
2029 {
2030         type = ARDOUR::AudioUnit;
2031 }
2032
2033 AUPluginInfo::~AUPluginInfo ()
2034 {
2035         type = ARDOUR::AudioUnit;
2036 }
2037
2038 PluginPtr
2039 AUPluginInfo::load (Session& session)
2040 {
2041         try {
2042                 PluginPtr plugin;
2043
2044                 TRACE_API ("load AU as a component\n");
2045                 boost::shared_ptr<CAComponent> comp (new CAComponent(*descriptor));
2046
2047                 if (!comp->IsValid()) {
2048                         error << ("AudioUnit: not a valid Component") << endmsg;
2049                 } else {
2050                         plugin.reset (new AUPlugin (session.engine(), session, comp));
2051                 }
2052
2053                 AUPluginInfo *aup = new AUPluginInfo (*this);
2054                 plugin->set_info (PluginInfoPtr (aup));
2055                 boost::dynamic_pointer_cast<AUPlugin> (plugin)->set_fixed_size_buffers (aup->creator == "Universal Audio");
2056                 return plugin;
2057         }
2058
2059         catch (failed_constructor &err) {
2060                 return PluginPtr ();
2061         }
2062 }
2063
2064 Glib::ustring
2065 AUPluginInfo::au_cache_path ()
2066 {
2067         return Glib::build_filename (ARDOUR::user_config_directory().to_string(), "au_cache");
2068 }
2069
2070 PluginInfoList*
2071 AUPluginInfo::discover ()
2072 {
2073         XMLTree tree;
2074
2075         if (!Glib::file_test (au_cache_path(), Glib::FILE_TEST_EXISTS)) {
2076                 ARDOUR::BootMessage (_("Discovering AudioUnit plugins (could take some time ...)"));
2077         }
2078
2079         PluginInfoList* plugs = new PluginInfoList;
2080
2081         discover_fx (*plugs);
2082         discover_music (*plugs);
2083         discover_generators (*plugs);
2084         discover_instruments (*plugs);
2085
2086         return plugs;
2087 }
2088
2089 void
2090 AUPluginInfo::discover_music (PluginInfoList& plugs)
2091 {
2092         CAComponentDescription desc;
2093         desc.componentFlags = 0;
2094         desc.componentFlagsMask = 0;
2095         desc.componentSubType = 0;
2096         desc.componentManufacturer = 0;
2097         desc.componentType = kAudioUnitType_MusicEffect;
2098
2099         discover_by_description (plugs, desc);
2100 }
2101
2102 void
2103 AUPluginInfo::discover_fx (PluginInfoList& plugs)
2104 {
2105         CAComponentDescription desc;
2106         desc.componentFlags = 0;
2107         desc.componentFlagsMask = 0;
2108         desc.componentSubType = 0;
2109         desc.componentManufacturer = 0;
2110         desc.componentType = kAudioUnitType_Effect;
2111
2112         discover_by_description (plugs, desc);
2113 }
2114
2115 void
2116 AUPluginInfo::discover_generators (PluginInfoList& plugs)
2117 {
2118         CAComponentDescription desc;
2119         desc.componentFlags = 0;
2120         desc.componentFlagsMask = 0;
2121         desc.componentSubType = 0;
2122         desc.componentManufacturer = 0;
2123         desc.componentType = kAudioUnitType_Generator;
2124
2125         discover_by_description (plugs, desc);
2126 }
2127
2128 void
2129 AUPluginInfo::discover_instruments (PluginInfoList& plugs)
2130 {
2131         CAComponentDescription desc;
2132         desc.componentFlags = 0;
2133         desc.componentFlagsMask = 0;
2134         desc.componentSubType = 0;
2135         desc.componentManufacturer = 0;
2136         desc.componentType = kAudioUnitType_MusicDevice;
2137
2138         discover_by_description (plugs, desc);
2139 }
2140
2141 void
2142 AUPluginInfo::discover_by_description (PluginInfoList& plugs, CAComponentDescription& desc)
2143 {
2144         Component comp = 0;
2145
2146         comp = FindNextComponent (NULL, &desc);
2147
2148         while (comp != NULL) {
2149                 CAComponentDescription temp;
2150                 GetComponentInfo (comp, &temp, NULL, NULL, NULL);
2151
2152                 AUPluginInfoPtr info (new AUPluginInfo
2153                                       (boost::shared_ptr<CAComponentDescription> (new CAComponentDescription(temp))));
2154
2155                 /* although apple designed the subtype field to be a "category" indicator,
2156                    its really turned into a plugin ID field for a given manufacturer. Hence
2157                    there are no categories for AudioUnits. However, to keep the plugins
2158                    showing up under "categories", we'll use the "type" as a high level
2159                    selector.
2160
2161                    NOTE: no panners, format converters or i/o AU's for our purposes
2162                  */
2163
2164                 switch (info->descriptor->Type()) {
2165                 case kAudioUnitType_Panner:
2166                 case kAudioUnitType_OfflineEffect:
2167                 case kAudioUnitType_FormatConverter:
2168                         continue;
2169
2170                 case kAudioUnitType_Output:
2171                         info->category = _("AudioUnit Outputs");
2172                         break;
2173                 case kAudioUnitType_MusicDevice:
2174                         info->category = _("AudioUnit Instruments");
2175                         break;
2176                 case kAudioUnitType_MusicEffect:
2177                         info->category = _("AudioUnit MusicEffects");
2178                         break;
2179                 case kAudioUnitType_Effect:
2180                         info->category = _("AudioUnit Effects");
2181                         break;
2182                 case kAudioUnitType_Mixer:
2183                         info->category = _("AudioUnit Mixers");
2184                         break;
2185                 case kAudioUnitType_Generator:
2186                         info->category = _("AudioUnit Generators");
2187                         break;
2188                 default:
2189                         info->category = _("AudioUnit (Unknown)");
2190                         break;
2191                 }
2192
2193                 AUPluginInfo::get_names (temp, info->name, info->creator);
2194
2195                 info->type = ARDOUR::AudioUnit;
2196                 info->unique_id = stringify_descriptor (*info->descriptor);
2197
2198                 /* XXX not sure of the best way to handle plugin versioning yet
2199                  */
2200
2201                 CAComponent cacomp (*info->descriptor);
2202
2203                 if (cacomp.GetResourceVersion (info->version) != noErr) {
2204                         info->version = 0;
2205                 }
2206
2207                 if (cached_io_configuration (info->unique_id, info->version, cacomp, info->cache, info->name)) {
2208
2209                         /* here we have to map apple's wildcard system to a simple pair
2210                            of values. in ::can_do() we use the whole system, but here
2211                            we need a single pair of values. XXX probably means we should
2212                            remove any use of these values.
2213                         */
2214
2215                         info->n_inputs.set (DataType::AUDIO, info->cache.io_configs.front().first);
2216                         info->n_outputs.set (DataType::AUDIO, info->cache.io_configs.front().second);
2217
2218                         cerr << "detected AU: " << info->name.c_str() << "  (" << info->cache.io_configs.size() << " i/o configurations) - " << info->unique_id << endl;
2219
2220                         plugs.push_back (info);
2221
2222                 } else {
2223                         error << string_compose (_("Cannot get I/O configuration info for AU %1"), info->name) << endmsg;
2224                 }
2225
2226                 comp = FindNextComponent (comp, &desc);
2227         }
2228 }
2229
2230 bool
2231 AUPluginInfo::cached_io_configuration (const std::string& unique_id,
2232                                        UInt32 version,
2233                                        CAComponent& comp,
2234                                        AUPluginCachedInfo& cinfo,
2235                                        const std::string& name)
2236 {
2237         std::string id;
2238         char buf[32];
2239
2240         /* concatenate unique ID with version to provide a key for cached info lookup.
2241            this ensures we don't get stale information, or should if plugin developers
2242            follow Apple "guidelines".
2243          */
2244
2245         snprintf (buf, sizeof (buf), "%u", (uint32_t) version);
2246         id = unique_id;
2247         id += '/';
2248         id += buf;
2249
2250         CachedInfoMap::iterator cim = cached_info.find (id);
2251
2252         if (cim != cached_info.end()) {
2253                 cinfo = cim->second;
2254                 return true;
2255         }
2256
2257         CAAudioUnit unit;
2258         AUChannelInfo* channel_info;
2259         UInt32 cnt;
2260         int ret;
2261
2262         ARDOUR::BootMessage (string_compose (_("Checking AudioUnit: %1"), name));
2263
2264         try {
2265
2266                 if (CAAudioUnit::Open (comp, unit) != noErr) {
2267                         return false;
2268                 }
2269
2270         } catch (...) {
2271
2272                 warning << string_compose (_("Could not load AU plugin %1 - ignored"), name) << endmsg;
2273                 cerr << string_compose (_("Could not load AU plugin %1 - ignored"), name) << endl;
2274                 return false;
2275
2276         }
2277
2278         TRACE_API ("get AU channel info\n");
2279         if ((ret = unit.GetChannelInfo (&channel_info, cnt)) < 0) {
2280                 return false;
2281         }
2282
2283         if (ret > 0) {
2284                 /* no explicit info available */
2285
2286                 cinfo.io_configs.push_back (pair<int,int> (-1, -1));
2287
2288         } else {
2289
2290                 /* store each configuration */
2291
2292                 for (uint32_t n = 0; n < cnt; ++n) {
2293                         cinfo.io_configs.push_back (pair<int,int> (channel_info[n].inChannels,
2294                                                                    channel_info[n].outChannels));
2295                 }
2296
2297                 free (channel_info);
2298         }
2299
2300         add_cached_info (id, cinfo);
2301         save_cached_info ();
2302
2303         return true;
2304 }
2305
2306 void
2307 AUPluginInfo::add_cached_info (const std::string& id, AUPluginCachedInfo& cinfo)
2308 {
2309         cached_info[id] = cinfo;
2310 }
2311
2312 #define AU_CACHE_VERSION "2.0"
2313
2314 void
2315 AUPluginInfo::save_cached_info ()
2316 {
2317         XMLNode* node;
2318
2319         node = new XMLNode (X_("AudioUnitPluginCache"));
2320         node->add_property( "version", AU_CACHE_VERSION );
2321
2322         for (map<string,AUPluginCachedInfo>::iterator i = cached_info.begin(); i != cached_info.end(); ++i) {
2323                 XMLNode* parent = new XMLNode (X_("plugin"));
2324                 parent->add_property ("id", i->first);
2325                 node->add_child_nocopy (*parent);
2326
2327                 for (vector<pair<int, int> >::iterator j = i->second.io_configs.begin(); j != i->second.io_configs.end(); ++j) {
2328
2329                         XMLNode* child = new XMLNode (X_("io"));
2330                         char buf[32];
2331
2332                         snprintf (buf, sizeof (buf), "%d", j->first);
2333                         child->add_property (X_("in"), buf);
2334                         snprintf (buf, sizeof (buf), "%d", j->second);
2335                         child->add_property (X_("out"), buf);
2336                         parent->add_child_nocopy (*child);
2337                 }
2338
2339         }
2340
2341         Glib::ustring path = au_cache_path ();
2342         XMLTree tree;
2343
2344         tree.set_root (node);
2345
2346         if (!tree.write (path)) {
2347                 error << string_compose (_("could not save AU cache to %1"), path) << endmsg;
2348                 unlink (path.c_str());
2349         }
2350 }
2351
2352 int
2353 AUPluginInfo::load_cached_info ()
2354 {
2355         Glib::ustring path = au_cache_path ();
2356         XMLTree tree;
2357
2358         if (!Glib::file_test (path, Glib::FILE_TEST_EXISTS)) {
2359                 return 0;
2360         }
2361
2362         if ( !tree.read (path) ) {
2363                 error << "au_cache is not a valid XML file.  AU plugins will be re-scanned" << endmsg;
2364                 return -1;
2365         }
2366
2367         const XMLNode* root (tree.root());
2368
2369         if (root->name() != X_("AudioUnitPluginCache")) {
2370                 return -1;
2371         }
2372
2373         //initial version has incorrectly stored i/o info, and/or garbage chars.
2374         const XMLProperty* version = root->property(X_("version"));
2375         if (! ((version != NULL) && (version->value() == X_(AU_CACHE_VERSION)))) {
2376                 error << "au_cache is not correct version.  AU plugins will be re-scanned" << endmsg;
2377                 return -1;
2378         }
2379
2380         cached_info.clear ();
2381
2382         const XMLNodeList children = root->children();
2383
2384         for (XMLNodeConstIterator iter = children.begin(); iter != children.end(); ++iter) {
2385
2386                 const XMLNode* child = *iter;
2387
2388                 if (child->name() == X_("plugin")) {
2389
2390                         const XMLNode* gchild;
2391                         const XMLNodeList gchildren = child->children();
2392                         const XMLProperty* prop = child->property (X_("id"));
2393
2394                         if (!prop) {
2395                                 continue;
2396                         }
2397
2398                         string id = prop->value();
2399                         string fixed;
2400                         string version;
2401
2402                         string::size_type slash = id.find_last_of ('/');
2403
2404                         if (slash == string::npos) {
2405                                 continue;
2406                         }
2407
2408                         version = id.substr (slash);
2409                         id = id.substr (0, slash);
2410                         fixed = AUPlugin::maybe_fix_broken_au_id (id);
2411
2412                         if (fixed.empty()) {
2413                                 error << string_compose (_("Your AudioUnit configuration cache contains an AU plugin whose ID cannot be understood - ignored (%1)"), id) << endmsg;
2414                                 continue;
2415                         }
2416
2417                         id = fixed;
2418                         id += version;
2419
2420                         AUPluginCachedInfo cinfo;
2421
2422                         for (XMLNodeConstIterator giter = gchildren.begin(); giter != gchildren.end(); giter++) {
2423
2424                                 gchild = *giter;
2425
2426                                 if (gchild->name() == X_("io")) {
2427
2428                                         int in;
2429                                         int out;
2430                                         const XMLProperty* iprop;
2431                                         const XMLProperty* oprop;
2432
2433                                         if (((iprop = gchild->property (X_("in"))) != 0) &&
2434                                             ((oprop = gchild->property (X_("out"))) != 0)) {
2435                                                 in = atoi (iprop->value());
2436                                                 out = atoi (oprop->value());
2437
2438                                                 cinfo.io_configs.push_back (pair<int,int> (in, out));
2439                                         }
2440                                 }
2441                         }
2442
2443                         if (cinfo.io_configs.size()) {
2444                                 add_cached_info (id, cinfo);
2445                         }
2446                 }
2447         }
2448
2449         return 0;
2450 }
2451
2452 void
2453 AUPluginInfo::get_names (CAComponentDescription& comp_desc, std::string& name, std::string& maker)
2454 {
2455         CFStringRef itemName = NULL;
2456
2457         // Marc Poirier-style item name
2458         CAComponent auComponent (comp_desc);
2459         if (auComponent.IsValid()) {
2460                 CAComponentDescription dummydesc;
2461                 Handle nameHandle = NewHandle(sizeof(void*));
2462                 if (nameHandle != NULL) {
2463                         OSErr err = GetComponentInfo(auComponent.Comp(), &dummydesc, nameHandle, NULL, NULL);
2464                         if (err == noErr) {
2465                                 ConstStr255Param nameString = (ConstStr255Param) (*nameHandle);
2466                                 if (nameString != NULL) {
2467                                         itemName = CFStringCreateWithPascalString(kCFAllocatorDefault, nameString, CFStringGetSystemEncoding());
2468                                 }
2469                         }
2470                         DisposeHandle(nameHandle);
2471                 }
2472         }
2473
2474         // if Marc-style fails, do the original way
2475         if (itemName == NULL) {
2476                 CFStringRef compTypeString = UTCreateStringForOSType(comp_desc.componentType);
2477                 CFStringRef compSubTypeString = UTCreateStringForOSType(comp_desc.componentSubType);
2478                 CFStringRef compManufacturerString = UTCreateStringForOSType(comp_desc.componentManufacturer);
2479
2480                 itemName = CFStringCreateWithFormat(kCFAllocatorDefault, NULL, CFSTR("%@ - %@ - %@"),
2481                         compTypeString, compManufacturerString, compSubTypeString);
2482
2483                 if (compTypeString != NULL)
2484                         CFRelease(compTypeString);
2485                 if (compSubTypeString != NULL)
2486                         CFRelease(compSubTypeString);
2487                 if (compManufacturerString != NULL)
2488                         CFRelease(compManufacturerString);
2489         }
2490
2491         string str = CFStringRefToStdString(itemName);
2492         string::size_type colon = str.find (':');
2493
2494         if (colon) {
2495                 name = str.substr (colon+1);
2496                 maker = str.substr (0, colon);
2497                 strip_whitespace_edges (maker);
2498                 strip_whitespace_edges (name);
2499         } else {
2500                 name = str;
2501                 maker = "unknown";
2502                 strip_whitespace_edges (name);
2503         }
2504 }
2505
2506 std::string
2507 AUPluginInfo::stringify_descriptor (const CAComponentDescription& desc)
2508 {
2509         stringstream s;
2510
2511         /* note: OSType is a compiler-implemenation-defined value,
2512            historically a 32 bit integer created with a multi-character
2513            constant such as 'abcd'. It is, fundamentally, an abomination.
2514         */
2515
2516         s << desc.Type();
2517         s << '-';
2518         s << desc.SubType();
2519         s << '-';
2520         s << desc.Manu();
2521
2522         return s.str();
2523 }
2524
2525 bool
2526 AUPluginInfo::needs_midi_input ()
2527 {
2528         return is_effect_with_midi_input () || is_instrument ();
2529 }
2530
2531 bool
2532 AUPluginInfo::is_effect () const
2533 {
2534         return is_effect_without_midi_input() || is_effect_with_midi_input();
2535 }
2536
2537 bool
2538 AUPluginInfo::is_effect_without_midi_input () const
2539 {
2540         return descriptor->IsAUFX();
2541 }
2542
2543 bool
2544 AUPluginInfo::is_effect_with_midi_input () const
2545 {
2546         return descriptor->IsAUFM();
2547 }
2548
2549 bool
2550 AUPluginInfo::is_instrument () const
2551 {
2552         return descriptor->IsMusicDevice();
2553 }