libs/ardour/session_vst.cc

   1 /*
   2     Copyright (C) 2004
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <stdbool.h>
  21 #include <cstdio>
  22
  23 #include <fst.h>
  24 #include <fst/vestige/aeffectx.h>
  25
  26 #include "ardour/session.h"
  27 #include "ardour/tempo.h"
  28 #include "ardour/vst_plugin.h"
  29
  30 #include "i18n.h"
  31
  32 #define DEBUG_CALLBACKS
  33 static int debug_callbacks = -1;
  34
  35 #ifdef DEBUG_CALLBACKS
  36 #define SHOW_CALLBACK if (debug_callbacks) printf
  37 #else
  38 #define SHOW_CALLBACK(...)
  39 #endif
  40
  41 using namespace ARDOUR;
  42
  43 long Session::vst_callback (AEffect* effect,
  44                             long opcode,
  45                             long index,
  46                             long value,
  47                             void* ptr,
  48                             float opt)
  49 {
  50         static VstTimeInfo _timeInfo;
  51         VSTPlugin* plug;
  52         Session* session;
  53
  54         if (debug_callbacks < 0) {
  55                 debug_callbacks = (getenv ("ARDOUR_DEBUG_VST_CALLBACKS") != 0);
  56         }
  57
  58         if (effect && effect->user) {
  59                 plug = (VSTPlugin*) (effect->user);
  60                 session = &plug->session();
  61                 SHOW_CALLBACK ("am callback 0x%x, opcode = %ld, plugin = \"%s\" ", (int) pthread_self(), opcode, plug->name());
  62         } else {
  63                 plug = 0;
  64                 session = 0;
  65                 SHOW_CALLBACK ("am callback 0x%x, opcode = %ld", (int) pthread_self(), opcode);
  66         }
  67
  68         switch(opcode){
  69
  70         case audioMasterAutomate:
  71                 SHOW_CALLBACK ("amc: audioMasterAutomate\n");
  72                 // index, value, returns 0
  73                 if (plug) {
  74                         plug->set_parameter (index, opt);
  75                 }
  76                 return 0;
  77
  78         case audioMasterVersion:
  79                 SHOW_CALLBACK ("amc: audioMasterVersion\n");
  80                 // vst version, currently 2 (0 for older)
  81                 return 2;
  82
  83         case audioMasterCurrentId:
  84                 SHOW_CALLBACK ("amc: audioMasterCurrentId\n");
  85                 // returns the unique id of a plug that's currently
  86                 // loading
  87                 return 0;
  88
  89         case audioMasterIdle:
  90                 SHOW_CALLBACK ("amc: audioMasterIdle\n");
  91                 // call application idle routine (this will
  92                 // call effEditIdle for all open editors too)
  93                 if (effect) {
  94                         effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
  95                 }
  96                 return 0;
  97
  98         case audioMasterPinConnected:
  99                 SHOW_CALLBACK ("amc: audioMasterPinConnected\n");
 100                 // inquire if an input or output is beeing connected;
 101                 // index enumerates input or output counting from zero:
 102                 // value is 0 for input and != 0 otherwise. note: the
 103                 // return value is 0 for <true> such that older versions
 104                 // will always return true.
 105                 return 1;
 106
 107         case audioMasterWantMidi:
 108                 SHOW_CALLBACK ("amc: audioMasterWantMidi\n");
 109                 // <value> is a filter which is currently ignored
 110                 if (plug) {
 111                         plug->get_info()->n_inputs.set_midi (1);
 112                 }
 113                 return 0;
 114
 115         case audioMasterGetTime:
 116                 SHOW_CALLBACK ("amc: audioMasterGetTime\n");
 117                 // returns const VstTimeInfo* (or 0 if not supported)
 118                 // <value> should contain a mask indicating which fields are required
 119                 // (see valid masks above), as some items may require extensive
 120                 // conversions
 121                 memset(&_timeInfo, 0, sizeof(_timeInfo));
 122                 if (session) {
 123                         _timeInfo.samplePos = session->transport_frame();
 124                         _timeInfo.sampleRate = session->frame_rate();
 125                         _timeInfo.flags = 0;
 126
 127                         if (value & (kVstTempoValid)) {
 128                                 const Tempo& t (session->tempo_map().tempo_at (session->transport_frame()));
 129                                 _timeInfo.tempo = t.beats_per_minute ();
 130                                 _timeInfo.flags |= (kVstTempoValid);
 131                         }
 132                         if (value & (kVstBarsValid)) {
 133                                 const Meter& m (session->tempo_map().meter_at (session->transport_frame()));
 134                                 _timeInfo.timeSigNumerator = m.beats_per_bar ();
 135                                 _timeInfo.timeSigDenominator = m.note_divisor ();
 136                                 _timeInfo.flags |= (kVstBarsValid);
 137                         }
 138
 139                         if (session->transport_speed() != 0.0f) {
 140                                 _timeInfo.flags |= kVstTransportPlaying;
 141                         }
 142                 }
 143
 144                 return (long)&_timeInfo;
 145
 146         case audioMasterProcessEvents:
 147                 SHOW_CALLBACK ("amc: audioMasterProcessEvents\n");
 148                 // VstEvents* in <ptr>
 149                 return 0;
 150
 151         case audioMasterSetTime:
 152                 SHOW_CALLBACK ("amc: audioMasterSetTime\n");
 153                 // VstTimenfo* in <ptr>, filter in <value>, not supported
 154
 155         case audioMasterTempoAt:
 156                 SHOW_CALLBACK ("amc: audioMasterTempoAt\n");
 157                 // returns tempo (in bpm * 10000) at sample frame location passed in <value>
 158                 if (session) {
 159                         const Tempo& t (session->tempo_map().tempo_at (value));
 160                         return t.beats_per_minute() * 1000;
 161                 } else {
 162                         return 0;
 163                 }
 164                 break;
 165
 166         case audioMasterGetNumAutomatableParameters:
 167                 SHOW_CALLBACK ("amc: audioMasterGetNumAutomatableParameters\n");
 168                 return 0;
 169
 170         case audioMasterGetParameterQuantization:
 171                 SHOW_CALLBACK ("amc: audioMasterGetParameterQuantization\n");
 172                // returns the integer value for +1.0 representation,
 173                // or 1 if full single float precision is maintained
 174                // in automation. parameter index in <value> (-1: all, any)
 175                 return 0;
 176
 177         case audioMasterIOChanged:
 178                 SHOW_CALLBACK ("amc: audioMasterIOChanged\n");
 179                // numInputs and/or numOutputs has changed
 180                 return 0;
 181
 182         case audioMasterNeedIdle:
 183                 SHOW_CALLBACK ("amc: audioMasterNeedIdle\n");
 184                 // plug needs idle calls (outside its editor window)
 185                 if (plug) {
 186                         plug->fst()->wantIdle = 1;
 187                 }
 188                 return 0;
 189
 190         case audioMasterSizeWindow:
 191                 SHOW_CALLBACK ("amc: audioMasterSizeWindow\n");
 192                 // index: width, value: height
 193                 return 0;
 194
 195         case audioMasterGetSampleRate:
 196                 SHOW_CALLBACK ("amc: audioMasterGetSampleRate\n");
 197                 if (session) {
 198                         return session->frame_rate();
 199                 }
 200                 return 0;
 201
 202         case audioMasterGetBlockSize:
 203                 SHOW_CALLBACK ("amc: audioMasterGetBlockSize\n");
 204                 if (session) {
 205                         return session->get_block_size();
 206                 }
 207                 return 0;
 208
 209         case audioMasterGetInputLatency:
 210                 SHOW_CALLBACK ("amc: audioMasterGetInputLatency\n");
 211                 return 0;
 212
 213         case audioMasterGetOutputLatency:
 214                 SHOW_CALLBACK ("amc: audioMasterGetOutputLatency\n");
 215                 return 0;
 216
 217         case audioMasterGetPreviousPlug:
 218                 SHOW_CALLBACK ("amc: audioMasterGetPreviousPlug\n");
 219                // input pin in <value> (-1: first to come), returns cEffect*
 220                 return 0;
 221
 222         case audioMasterGetNextPlug:
 223                 SHOW_CALLBACK ("amc: audioMasterGetNextPlug\n");
 224                // output pin in <value> (-1: first to come), returns cEffect*
 225
 226         case audioMasterWillReplaceOrAccumulate:
 227                 SHOW_CALLBACK ("amc: audioMasterWillReplaceOrAccumulate\n");
 228                // returns: 0: not supported, 1: replace, 2: accumulate
 229                 return 0;
 230
 231         case audioMasterGetCurrentProcessLevel:
 232                 SHOW_CALLBACK ("amc: audioMasterGetCurrentProcessLevel\n");
 233                 // returns: 0: not supported,
 234                 // 1: currently in user thread (gui)
 235                 // 2: currently in audio thread (where process is called)
 236                 // 3: currently in 'sequencer' thread (midi, timer etc)
 237                 // 4: currently offline processing and thus in user thread
 238                 // other: not defined, but probably pre-empting user thread.
 239                 return 0;
 240
 241         case audioMasterGetAutomationState:
 242                 SHOW_CALLBACK ("amc: audioMasterGetAutomationState\n");
 243                 // returns 0: not supported, 1: off, 2:read, 3:write, 4:read/write
 244                 // offline
 245                 return 0;
 246
 247         case audioMasterOfflineStart:
 248                 SHOW_CALLBACK ("amc: audioMasterOfflineStart\n");
 249         case audioMasterOfflineRead:
 250                 SHOW_CALLBACK ("amc: audioMasterOfflineRead\n");
 251                // ptr points to offline structure, see below. return 0: error, 1 ok
 252                 return 0;
 253
 254         case audioMasterOfflineWrite:
 255                 SHOW_CALLBACK ("amc: audioMasterOfflineWrite\n");
 256                 // same as read
 257                 return 0;
 258
 259         case audioMasterOfflineGetCurrentPass:
 260                 SHOW_CALLBACK ("amc: audioMasterOfflineGetCurrentPass\n");
 261         case audioMasterOfflineGetCurrentMetaPass:
 262                 SHOW_CALLBACK ("amc: audioMasterOfflineGetCurrentMetaPass\n");
 263                 return 0;
 264
 265         case audioMasterSetOutputSampleRate:
 266                 SHOW_CALLBACK ("amc: audioMasterSetOutputSampleRate\n");
 267                 // for variable i/o, sample rate in <opt>
 268                 return 0;
 269
 270         case audioMasterGetSpeakerArrangement:
 271                 SHOW_CALLBACK ("amc: audioMasterGetSpeakerArrangement\n");
 272                 // (long)input in <value>, output in <ptr>
 273                 return 0;
 274
 275         case audioMasterGetVendorString:
 276                 SHOW_CALLBACK ("amc: audioMasterGetVendorString\n");
 277                 // fills <ptr> with a string identifying the vendor (max 64 char)
 278                 strcpy ((char*) ptr, "Linux Audio Systems");
 279                 return 0;
 280
 281         case audioMasterGetProductString:
 282                 SHOW_CALLBACK ("amc: audioMasterGetProductString\n");
 283                 // fills <ptr> with a string with product name (max 64 char)
 284                 strcpy ((char*) ptr, "Ardour");
 285                 return 0;
 286
 287         case audioMasterGetVendorVersion:
 288                 SHOW_CALLBACK ("amc: audioMasterGetVendorVersion\n");
 289                 // returns vendor-specific version
 290                 return 900;
 291
 292         case audioMasterVendorSpecific:
 293                 SHOW_CALLBACK ("amc: audioMasterVendorSpecific\n");
 294                 // no definition, vendor specific handling
 295                 return 0;
 296
 297         case audioMasterSetIcon:
 298                 SHOW_CALLBACK ("amc: audioMasterSetIcon\n");
 299                 // void* in <ptr>, format not defined yet
 300                 return 0;
 301
 302         case audioMasterCanDo:
 303                 SHOW_CALLBACK ("amc: audioMasterCanDo\n");
 304                 // string in ptr, see below
 305                 return 0;
 306
 307         case audioMasterGetLanguage:
 308                 SHOW_CALLBACK ("amc: audioMasterGetLanguage\n");
 309                 // see enum
 310                 return 0;
 311
 312         case audioMasterOpenWindow:
 313                 SHOW_CALLBACK ("amc: audioMasterOpenWindow\n");
 314                 // returns platform specific ptr
 315                 return 0;
 316
 317         case audioMasterCloseWindow:
 318                 SHOW_CALLBACK ("amc: audioMasterCloseWindow\n");
 319                 // close window, platform specific handle in <ptr>
 320                 return 0;
 321
 322         case audioMasterGetDirectory:
 323                 SHOW_CALLBACK ("amc: audioMasterGetDirectory\n");
 324                 // get plug directory, FSSpec on MAC, else char*
 325                 return 0;
 326
 327         case audioMasterUpdateDisplay:
 328                 SHOW_CALLBACK ("amc: audioMasterUpdateDisplay\n");
 329                 // something has changed, update 'multi-fx' display
 330                 if (effect) {
 331                         effect->dispatcher(effect, effEditIdle, 0, 0, NULL, 0.0f);
 332                 }
 333                 return 0;
 334
 335         case audioMasterBeginEdit:
 336                 SHOW_CALLBACK ("amc: audioMasterBeginEdit\n");
 337                 // begin of automation session (when mouse down), parameter index in <index>
 338                 return 0;
 339
 340         case audioMasterEndEdit:
 341                 SHOW_CALLBACK ("amc: audioMasterEndEdit\n");
 342                 // end of automation session (when mouse up),     parameter index in <index>
 343                 return 0;
 344
 345         case audioMasterOpenFileSelector:
 346                 SHOW_CALLBACK ("amc: audioMasterOpenFileSelector\n");
 347                 // open a fileselector window with VstFileSelect* in <ptr>
 348                 return 0;
 349
 350         default:
 351                 SHOW_CALLBACK ("VST master dispatcher: undefed: %ld\n", opcode);
 352                 break;
 353         }
 354
 355         return 0;
 356 }
 357