/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVMFunctions.cpp
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Diff of /linuxsampler/trunk/src/engines/common/InstrumentScriptVMFunctions.cpp

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revision 3205 by schoenebeck, Wed May 24 20:05:38 2017 UTC revision 3381 by schoenebeck, Tue Nov 28 15:54:49 2017 UTC
# Line 23  namespace LinuxSampler { Line 23  namespace LinuxSampler {
23      VMFnResult* InstrumentScriptVMFunction_play_note::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_play_note::exec(VMFnArgs* args) {
24          int note = args->arg(0)->asInt()->evalInt();          int note = args->arg(0)->asInt()->evalInt();
25          int velocity = (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : 127;          int velocity = (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : 127;
         int sampleoffset = (args->argsCount() >= 3) ? args->arg(2)->asInt()->evalInt() : 0;  
26          int duration = (args->argsCount() >= 4) ? args->arg(3)->asInt()->evalInt() : 0; //TODO: -1 might be a better default value instead of 0          int duration = (args->argsCount() >= 4) ? args->arg(3)->asInt()->evalInt() : 0; //TODO: -1 might be a better default value instead of 0
27    
28          if (note < 0 || note > 127) {          if (note < 0 || note > 127) {
# Line 36  namespace LinuxSampler { Line 35  namespace LinuxSampler {
35              return errorResult(0);              return errorResult(0);
36          }          }
37    
38          if (sampleoffset < 0) {          if (duration < -2) {
39              errMsg("play_note(): argument 3 may not be a negative sample offset");              errMsg("play_note(): argument 4 must be a duration value of at least -2 or higher");
             return errorResult(0);  
         } else if (sampleoffset != 0) {  
             wrnMsg("play_note(): argument 3 does not support a sample offset other than 0 yet");  
         }  
   
         if (duration < -1) {  
             errMsg("play_note(): argument 4 must be a duration value of at least -1 or higher");  
40              return errorResult(0);              return errorResult(0);
41          }          }
42    
# Line 63  namespace LinuxSampler { Line 55  namespace LinuxSampler {
55                  return errorResult(0);                  return errorResult(0);
56              }              }
57              e.Param.Note.ParentNoteID = m_vm->m_event->cause.Param.Note.ID;              e.Param.Note.ParentNoteID = m_vm->m_event->cause.Param.Note.ID;
58                // check if that requested parent note is actually still alive
59                NoteBase* pParentNote =
60                    pEngineChannel->pEngine->NoteByID( e.Param.Note.ParentNoteID );
61                // if parent note is already gone then this new note is not required anymore
62                if (!pParentNote)
63                    return successResult(0);
64          }          }
65    
66          const note_id_t id = pEngineChannel->ScheduleNoteMicroSec(&e, 0);          const note_id_t id = pEngineChannel->ScheduleNoteMicroSec(&e, 0);
67    
68            // if a sample offset is supplied, assign the offset as override
69            // to the previously created Note object
70            if (args->argsCount() >= 3) {
71                int sampleoffset = args->arg(2)->asInt()->evalInt();
72                if (sampleoffset >= 0) {
73                    NoteBase* pNote = pEngineChannel->pEngine->NoteByID(id);
74                    if (pNote) {
75                        pNote->Override.SampleOffset = sampleoffset;
76                    }
77                } else if (sampleoffset < -1) {
78                    errMsg("play_note(): sample offset of argument 3 may not be less than -1");
79                }
80            }
81    
82          // if a duration is supplied (and play-note event was scheduled          // if a duration is supplied (and play-note event was scheduled
83          // successfully above), then schedule a subsequent stop-note event          // successfully above), then schedule a subsequent stop-note event
84          if (id && duration > 0) {          if (id && duration > 0) {
# Line 136  namespace LinuxSampler { Line 148  namespace LinuxSampler {
148          AbstractEngineChannel* pEngineChannel =          AbstractEngineChannel* pEngineChannel =
149                  static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);                  static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
150    
151          if (args->arg(0)->exprType() == INT_EXPR) {          if (args->argsCount() == 0 || args->arg(0)->exprType() == INT_EXPR) {
152              const ScriptID id = args->arg(0)->asInt()->evalInt();              const ScriptID id = (args->argsCount() >= 1) ? args->arg(0)->asInt()->evalInt() : m_vm->m_event->id;
153              if (!id) {              if (!id && args->argsCount() >= 1) {
154                  wrnMsg("ignore_event(): event ID argument may not be zero");                  wrnMsg("ignore_event(): event ID argument may not be zero");
155                  // not errorResult(), because that would abort the script, not intentional in this case                  // not errorResult(), because that would abort the script, not intentional in this case
156                  return successResult();                  return successResult();
# Line 385  namespace LinuxSampler { Line 397  namespace LinuxSampler {
397              if (!pNote) return successResult();              if (!pNote) return successResult();
398    
399              // if change_vol() was called immediately after note was triggered              // if change_vol() was called immediately after note was triggered
400              // then immediately apply the volume to note object              // then immediately apply the volume to note object, but only if
401              if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {              // change_vol_time() has not been called before
402                if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime &&
403                    pNote->Override.VolumeTime <= DEFAULT_NOTE_VOLUME_TIME_S)
404                {
405                  if (relative)                  if (relative)
406                      pNote->Override.Volume *= fVolumeLin;                      pNote->Override.Volume *= fVolumeLin;
407                  else                  else
# Line 412  namespace LinuxSampler { Line 427  namespace LinuxSampler {
427                  if (!pNote) continue;                  if (!pNote) continue;
428    
429                  // if change_vol() was called immediately after note was triggered                  // if change_vol() was called immediately after note was triggered
430                  // then immediately apply the volume to Note object                  // then immediately apply the volume to Note object, but only if
431                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {                  // change_vol_time() has not been called before
432                    if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime &&
433                        pNote->Override.VolumeTime <= DEFAULT_NOTE_VOLUME_TIME_S)
434                    {
435                      if (relative)                      if (relative)
436                          pNote->Override.Volume *= fVolumeLin;                          pNote->Override.Volume *= fVolumeLin;
437                      else                      else
# Line 472  namespace LinuxSampler { Line 490  namespace LinuxSampler {
490              if (!pNote) return successResult();              if (!pNote) return successResult();
491    
492              // if change_tune() was called immediately after note was triggered              // if change_tune() was called immediately after note was triggered
493              // then immediately apply the tuning to Note object              // then immediately apply the tuning to Note object, but only if
494              if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {              // change_tune_time() has not been called before
495                if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime &&
496                    pNote->Override.PitchTime <= DEFAULT_NOTE_PITCH_TIME_S)
497                {
498                  if (relative)                  if (relative)
499                      pNote->Override.Pitch *= fFreqRatio;                      pNote->Override.Pitch *= fFreqRatio;
500                  else                  else
# Line 499  namespace LinuxSampler { Line 520  namespace LinuxSampler {
520                  if (!pNote) continue;                  if (!pNote) continue;
521    
522                  // if change_tune() was called immediately after note was triggered                  // if change_tune() was called immediately after note was triggered
523                  // then immediately apply the tuning to Note object                  // then immediately apply the tuning to Note object, but only if
524                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {                  // change_tune_time() has not been called before
525                    if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime &&
526                        pNote->Override.PitchTime <= DEFAULT_NOTE_PITCH_TIME_S)
527                    {
528                      if (relative)                      if (relative)
529                          pNote->Override.Pitch *= fFreqRatio;                          pNote->Override.Pitch *= fFreqRatio;
530                      else                      else
# Line 814  namespace LinuxSampler { Line 838  namespace LinuxSampler {
838    
839      VMFnResult* InstrumentScriptVMFunction_change_attack::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_attack::exec(VMFnArgs* args) {
840          int attack = args->arg(1)->asInt()->evalInt();          int attack = args->arg(1)->asInt()->evalInt();
841          if (attack > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
842              wrnMsg("change_attack(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the attack time)
843              attack = VM_EG_PAR_MAX_VALUE;          if (attack < 0) {
         } else if (attack < 0) {  
844              wrnMsg("change_attack(): argument 2 may not be negative");              wrnMsg("change_attack(): argument 2 may not be negative");
845              attack = 0;              attack = 0;
846          }          }
# Line 901  namespace LinuxSampler { Line 924  namespace LinuxSampler {
924    
925      VMFnResult* InstrumentScriptVMFunction_change_decay::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_decay::exec(VMFnArgs* args) {
926          int decay = args->arg(1)->asInt()->evalInt();          int decay = args->arg(1)->asInt()->evalInt();
927          if (decay > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
928              wrnMsg("change_decay(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the decay time)
929              decay = VM_EG_PAR_MAX_VALUE;          if (decay < 0) {
         } else if (decay < 0) {  
930              wrnMsg("change_decay(): argument 2 may not be negative");              wrnMsg("change_decay(): argument 2 may not be negative");
931              decay = 0;              decay = 0;
932          }          }
# Line 988  namespace LinuxSampler { Line 1010  namespace LinuxSampler {
1010    
1011      VMFnResult* InstrumentScriptVMFunction_change_release::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_release::exec(VMFnArgs* args) {
1012          int release = args->arg(1)->asInt()->evalInt();          int release = args->arg(1)->asInt()->evalInt();
1013          if (release > VM_EG_PAR_MAX_VALUE) {          // note: intentionally not checking against a max. value here!
1014              wrnMsg("change_release(): argument 2 may not be larger than 1000000");          // (to allow i.e. passing 2000000 for doubling the release time)
1015              release = VM_EG_PAR_MAX_VALUE;          if (release < 0) {
         } else if (release < 0) {  
1016              wrnMsg("change_release(): argument 2 may not be negative");              wrnMsg("change_release(): argument 2 may not be negative");
1017              release = 0;              release = 0;
1018          }          }
# Line 1059  namespace LinuxSampler { Line 1080  namespace LinuxSampler {
1080          return successResult();          return successResult();
1081      }      }
1082    
1083        // template for change_*() functions
1084    
1085      bool VMChangeSynthParamFunction::acceptsArgType(int iArg, ExprType_t type) const {      bool VMChangeSynthParamFunction::acceptsArgType(int iArg, ExprType_t type) const {
1086          if (iArg == 0)          if (iArg == 0)
1087              return type == INT_EXPR || type == INT_ARR_EXPR;              return type == INT_EXPR || type == INT_ARR_EXPR;
# Line 1151  namespace LinuxSampler { Line 1174  namespace LinuxSampler {
1174          return successResult();          return successResult();
1175      }      }
1176    
1177        // change_sustain() function
1178    
1179        VMFnResult* InstrumentScriptVMFunction_change_sustain::exec(VMFnArgs* args) {
1180            return VMChangeSynthParamFunction::execTemplate<
1181                        &NoteBase::_Override::Sustain,
1182                        Event::synth_param_sustain,
1183                        false, NO_LIMIT, 0>( args, "change_sustain" );
1184        }
1185    
1186        // change_cutoff_attack() function
1187    
1188        VMFnResult* InstrumentScriptVMFunction_change_cutoff_attack::exec(VMFnArgs* args) {
1189            return VMChangeSynthParamFunction::execTemplate<
1190                        &NoteBase::_Override::CutoffAttack,
1191                        Event::synth_param_cutoff_attack,
1192                        false, NO_LIMIT, 0>( args, "change_cutoff_attack" );
1193        }
1194    
1195        // change_cutoff_decay() function
1196    
1197        VMFnResult* InstrumentScriptVMFunction_change_cutoff_decay::exec(VMFnArgs* args) {
1198            return VMChangeSynthParamFunction::execTemplate<
1199                        &NoteBase::_Override::CutoffDecay,
1200                        Event::synth_param_cutoff_decay,
1201                        false, NO_LIMIT, 0>( args, "change_cutoff_decay" );
1202        }
1203    
1204        // change_cutoff_sustain() function
1205    
1206        VMFnResult* InstrumentScriptVMFunction_change_cutoff_sustain::exec(VMFnArgs* args) {
1207            return VMChangeSynthParamFunction::execTemplate<
1208                        &NoteBase::_Override::CutoffSustain,
1209                        Event::synth_param_cutoff_sustain,
1210                        false, NO_LIMIT, 0>( args, "change_cutoff_sustain" );
1211        }
1212    
1213        // change_cutoff_release() function
1214    
1215        VMFnResult* InstrumentScriptVMFunction_change_cutoff_release::exec(VMFnArgs* args) {
1216            return VMChangeSynthParamFunction::execTemplate<
1217                        &NoteBase::_Override::CutoffRelease,
1218                        Event::synth_param_cutoff_release,
1219                        false, NO_LIMIT, 0>( args, "change_cutoff_release" );
1220        }
1221    
1222      // change_amp_lfo_depth() function      // change_amp_lfo_depth() function
1223    
1224      VMFnResult* InstrumentScriptVMFunction_change_amp_lfo_depth::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_amp_lfo_depth::exec(VMFnArgs* args) {
# Line 1169  namespace LinuxSampler { Line 1237  namespace LinuxSampler {
1237                      true, 1000000, 0>( args, "change_amp_lfo_freq" );                      true, 1000000, 0>( args, "change_amp_lfo_freq" );
1238      }      }
1239    
1240        // change_cutoff_lfo_depth() function
1241    
1242        VMFnResult* InstrumentScriptVMFunction_change_cutoff_lfo_depth::exec(VMFnArgs* args) {
1243            return VMChangeSynthParamFunction::execTemplate<
1244                        &NoteBase::_Override::CutoffLFODepth,
1245                        Event::synth_param_cutoff_lfo_depth,
1246                        true, 1000000, 0>( args, "change_cutoff_lfo_depth" );
1247        }
1248    
1249        // change_cutoff_lfo_freq() function
1250    
1251        VMFnResult* InstrumentScriptVMFunction_change_cutoff_lfo_freq::exec(VMFnArgs* args) {
1252            return VMChangeSynthParamFunction::execTemplate<
1253                        &NoteBase::_Override::CutoffLFOFreq,
1254                        Event::synth_param_cutoff_lfo_freq,
1255                        true, 1000000, 0>( args, "change_cutoff_lfo_freq" );
1256        }
1257    
1258      // change_pitch_lfo_depth() function      // change_pitch_lfo_depth() function
1259    
1260      VMFnResult* InstrumentScriptVMFunction_change_pitch_lfo_depth::exec(VMFnArgs* args) {      VMFnResult* InstrumentScriptVMFunction_change_pitch_lfo_depth::exec(VMFnArgs* args) {
# Line 1205  namespace LinuxSampler { Line 1291  namespace LinuxSampler {
1291                      false, NO_LIMIT, 0>( args, "change_tune_time" );                      false, NO_LIMIT, 0>( args, "change_tune_time" );
1292      }      }
1293    
1294        // change_pan_time() function
1295    
1296        VMFnResult* InstrumentScriptVMFunction_change_pan_time::exec(VMFnArgs* args) {
1297            return VMChangeSynthParamFunction::execTemplate<
1298            &NoteBase::_Override::PanTime,
1299            Event::synth_param_pan_time,
1300            false, NO_LIMIT, 0>( args, "change_pan_time" );
1301        }
1302    
1303        // template for change_*_curve() functions
1304    
1305        bool VMChangeFadeCurveFunction::acceptsArgType(int iArg, ExprType_t type) const {
1306            if (iArg == 0)
1307                return type == INT_EXPR || type == INT_ARR_EXPR;
1308            else
1309                return type == INT_EXPR;
1310        }
1311    
1312        template<fade_curve_t NoteBase::_Override::*T_noteParam, int T_synthParam>
1313        VMFnResult* VMChangeFadeCurveFunction::execTemplate(VMFnArgs* args, const char* functionName) {
1314            int value = args->arg(1)->asInt()->evalInt();
1315            switch (value) {
1316                case FADE_CURVE_LINEAR:
1317                case FADE_CURVE_EASE_IN_EASE_OUT:
1318                    break;
1319                default:
1320                    wrnMsg(String(functionName) + "(): invalid curve type passed as argument 2");
1321                    return successResult();
1322            }
1323    
1324            AbstractEngineChannel* pEngineChannel =
1325                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1326    
1327            if (args->arg(0)->exprType() == INT_EXPR) {
1328                const ScriptID id = args->arg(0)->asInt()->evalInt();
1329                if (!id) {
1330                    wrnMsg(String(functionName) + "(): note ID for argument 1 may not be zero");
1331                    return successResult();
1332                }
1333                if (!id.isNoteID()) {
1334                    wrnMsg(String(functionName) + "(): argument 1 is not a note ID");
1335                    return successResult();
1336                }
1337    
1338                NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1339                if (!pNote) return successResult();
1340    
1341                // if this change_*_curve() script function was called immediately after
1342                // note was triggered then immediately apply the synth parameter
1343                // change to Note object
1344                if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1345                    pNote->Override.*T_noteParam = (fade_curve_t) value;
1346                } else { // otherwise schedule this synth parameter change ...
1347                    Event e = m_vm->m_event->cause; // copy to get fragment time for "now"
1348                    e.Init(); // clear IDs
1349                    e.Type = Event::type_note_synth_param;
1350                    e.Param.NoteSynthParam.NoteID   = id.noteID();
1351                    e.Param.NoteSynthParam.Type     = (Event::synth_param_t) T_synthParam;
1352                    e.Param.NoteSynthParam.Delta    = value;
1353                    e.Param.NoteSynthParam.Relative = false;
1354    
1355                    pEngineChannel->ScheduleEventMicroSec(&e, 0);
1356                }
1357            } else if (args->arg(0)->exprType() == INT_ARR_EXPR) {
1358                VMIntArrayExpr* ids = args->arg(0)->asIntArray();
1359                for (int i = 0; i < ids->arraySize(); ++i) {
1360                    const ScriptID id = ids->evalIntElement(i);
1361                    if (!id || !id.isNoteID()) continue;
1362    
1363                    NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1364                    if (!pNote) continue;
1365    
1366                    // if this change_*_curve() script function was called immediately after
1367                    // note was triggered then immediately apply the synth parameter
1368                    // change to Note object
1369                    if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1370                        pNote->Override.*T_noteParam = (fade_curve_t) value;
1371                    } else { // otherwise schedule this synth parameter change ...
1372                        Event e = m_vm->m_event->cause; // copy to get fragment time for "now"
1373                        e.Init(); // clear IDs
1374                        e.Type = Event::type_note_synth_param;
1375                        e.Param.NoteSynthParam.NoteID   = id.noteID();
1376                        e.Param.NoteSynthParam.Type     = (Event::synth_param_t) T_synthParam;
1377                        e.Param.NoteSynthParam.Delta    = value;
1378                        e.Param.NoteSynthParam.Relative = false;
1379    
1380                        pEngineChannel->ScheduleEventMicroSec(&e, 0);
1381                    }
1382                }
1383            }
1384    
1385            return successResult();
1386        }
1387    
1388        // change_vol_curve() function
1389    
1390        VMFnResult* InstrumentScriptVMFunction_change_vol_curve::exec(VMFnArgs* args) {
1391            return VMChangeFadeCurveFunction::execTemplate<
1392                        &NoteBase::_Override::VolumeCurve,
1393                        Event::synth_param_volume_curve>( args, "change_vol_curve" );
1394        }
1395    
1396        // change_tune_curve() function
1397    
1398        VMFnResult* InstrumentScriptVMFunction_change_tune_curve::exec(VMFnArgs* args) {
1399            return VMChangeFadeCurveFunction::execTemplate<
1400                        &NoteBase::_Override::PitchCurve,
1401                        Event::synth_param_pitch_curve>( args, "change_tune_curve" );
1402        }
1403    
1404        // change_pan_curve() function
1405    
1406        VMFnResult* InstrumentScriptVMFunction_change_pan_curve::exec(VMFnArgs* args) {
1407            return VMChangeFadeCurveFunction::execTemplate<
1408            &NoteBase::_Override::PanCurve,
1409            Event::synth_param_pan_curve>( args, "change_pan_curve" );
1410        }
1411    
1412      // fade_in() function      // fade_in() function
1413    
1414      InstrumentScriptVMFunction_fade_in::InstrumentScriptVMFunction_fade_in(InstrumentScriptVM* parent)      InstrumentScriptVMFunction_fade_in::InstrumentScriptVMFunction_fade_in(InstrumentScriptVM* parent)
# Line 1555  namespace LinuxSampler { Line 1759  namespace LinuxSampler {
1759                      wrnMsg("set_event_par(): note number of argument 3 is out of range");                      wrnMsg("set_event_par(): note number of argument 3 is out of range");
1760                      return successResult();                      return successResult();
1761                  }                  }
1762                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime)                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1763                      pNote->cause.Param.Note.Key = value;                      pNote->cause.Param.Note.Key = value;
1764                  else                      m_vm->m_event->cause.Param.Note.Key = value;
1765                    } else {
1766                      wrnMsg("set_event_par(): note number can only be changed when note is new");                      wrnMsg("set_event_par(): note number can only be changed when note is new");
1767                    }
1768                  return successResult();                  return successResult();
1769              case EVENT_PAR_VELOCITY:              case EVENT_PAR_VELOCITY:
1770                  if (value < 0 || value > 127) {                  if (value < 0 || value > 127) {
1771                      wrnMsg("set_event_par(): velocity of argument 3 is out of range");                      wrnMsg("set_event_par(): velocity of argument 3 is out of range");
1772                      return successResult();                      return successResult();
1773                  }                  }
1774                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime)                  if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1775                      pNote->cause.Param.Note.Velocity = value;                      pNote->cause.Param.Note.Velocity = value;
1776                  else                      m_vm->m_event->cause.Param.Note.Velocity = value;
1777                    } else {
1778                      wrnMsg("set_event_par(): velocity can only be changed when note is new");                      wrnMsg("set_event_par(): velocity can only be changed when note is new");
1779                    }
1780                  return successResult();                  return successResult();
1781              case EVENT_PAR_VOLUME:              case EVENT_PAR_VOLUME:
1782                  wrnMsg("set_event_par(): changing volume by this function is currently not supported, use change_vol() instead");                  wrnMsg("set_event_par(): changing volume by this function is currently not supported, use change_vol() instead");
# Line 1594  namespace LinuxSampler { Line 1802  namespace LinuxSampler {
1802          return successResult();          return successResult();
1803      }      }
1804    
1805        // change_note() function
1806    
1807        InstrumentScriptVMFunction_change_note::InstrumentScriptVMFunction_change_note(InstrumentScriptVM* parent)
1808        : m_vm(parent)
1809        {
1810        }
1811    
1812        VMFnResult* InstrumentScriptVMFunction_change_note::exec(VMFnArgs* args) {
1813            AbstractEngineChannel* pEngineChannel =
1814                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1815    
1816            const ScriptID id = args->arg(0)->asInt()->evalInt();
1817            if (!id) {
1818                wrnMsg("change_note(): note ID for argument 1 may not be zero");
1819                return successResult();
1820            }
1821            if (!id.isNoteID()) {
1822                wrnMsg("change_note(): argument 1 is not a note ID");
1823                return successResult();
1824            }
1825    
1826            NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1827            if (!pNote) return successResult();
1828    
1829            const int value = args->arg(1)->asInt()->evalInt();
1830            if (value < 0 || value > 127) {
1831                wrnMsg("change_note(): note number of argument 2 is out of range");
1832                return successResult();
1833            }
1834    
1835            if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1836                pNote->cause.Param.Note.Key = value;
1837                m_vm->m_event->cause.Param.Note.Key = value;
1838            } else {
1839                wrnMsg("change_note(): note number can only be changed when note is new");
1840            }
1841    
1842            return successResult();
1843        }
1844    
1845        // change_velo() function
1846    
1847        InstrumentScriptVMFunction_change_velo::InstrumentScriptVMFunction_change_velo(InstrumentScriptVM* parent)
1848        : m_vm(parent)
1849        {
1850        }
1851    
1852        VMFnResult* InstrumentScriptVMFunction_change_velo::exec(VMFnArgs* args) {
1853            AbstractEngineChannel* pEngineChannel =
1854                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1855    
1856            const ScriptID id = args->arg(0)->asInt()->evalInt();
1857            if (!id) {
1858                wrnMsg("change_velo(): note ID for argument 1 may not be zero");
1859                return successResult();
1860            }
1861            if (!id.isNoteID()) {
1862                wrnMsg("change_velo(): argument 1 is not a note ID");
1863                return successResult();
1864            }
1865    
1866            NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1867            if (!pNote) return successResult();
1868    
1869            const int value = args->arg(1)->asInt()->evalInt();
1870            if (value < 0 || value > 127) {
1871                wrnMsg("change_velo(): velocity of argument 2 is out of range");
1872                return successResult();
1873            }
1874    
1875            if (m_vm->m_event->scheduleTime == pNote->triggerSchedTime) {
1876                pNote->cause.Param.Note.Velocity = value;
1877                m_vm->m_event->cause.Param.Note.Velocity = value;
1878            } else {
1879                wrnMsg("change_velo(): velocity can only be changed when note is new");
1880            }
1881    
1882            return successResult();
1883        }
1884    
1885        // change_play_pos() function
1886    
1887        InstrumentScriptVMFunction_change_play_pos::InstrumentScriptVMFunction_change_play_pos(InstrumentScriptVM* parent)
1888        : m_vm(parent)
1889        {
1890        }
1891    
1892        VMFnResult* InstrumentScriptVMFunction_change_play_pos::exec(VMFnArgs* args) {
1893            const ScriptID id = args->arg(0)->asInt()->evalInt();
1894            if (!id) {
1895                wrnMsg("change_play_pos(): note ID for argument 1 may not be zero");
1896                return successResult();
1897            }
1898            if (!id.isNoteID()) {
1899                wrnMsg("change_play_pos(): argument 1 is not a note ID");
1900                return successResult();
1901            }
1902    
1903            const int pos = args->arg(1)->asInt()->evalInt();
1904            if (pos < 0) {
1905                wrnMsg("change_play_pos(): playback position of argument 2 may not be negative");
1906                return successResult();
1907            }
1908    
1909            AbstractEngineChannel* pEngineChannel =
1910                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1911    
1912            NoteBase* pNote = pEngineChannel->pEngine->NoteByID( id.noteID() );
1913            if (!pNote) return successResult();
1914    
1915            pNote->Override.SampleOffset = pos;
1916    
1917            return successResult();
1918        }
1919    
1920      // event_status() function      // event_status() function
1921    
1922      InstrumentScriptVMFunction_event_status::InstrumentScriptVMFunction_event_status(InstrumentScriptVM* parent)      InstrumentScriptVMFunction_event_status::InstrumentScriptVMFunction_event_status(InstrumentScriptVM* parent)
# Line 1619  namespace LinuxSampler { Line 1942  namespace LinuxSampler {
1942          return successResult(pNote ? EVENT_STATUS_NOTE_QUEUE : EVENT_STATUS_INACTIVE);          return successResult(pNote ? EVENT_STATUS_NOTE_QUEUE : EVENT_STATUS_INACTIVE);
1943      }      }
1944    
1945        // callback_status() function
1946    
1947        InstrumentScriptVMFunction_callback_status::InstrumentScriptVMFunction_callback_status(InstrumentScriptVM* parent)
1948            : m_vm(parent)
1949        {
1950        }
1951    
1952        VMFnResult* InstrumentScriptVMFunction_callback_status::exec(VMFnArgs* args) {
1953            const script_callback_id_t id = args->arg(0)->asInt()->evalInt();
1954            if (!id) {
1955                wrnMsg("callback_status(): callback ID for argument 1 may not be zero");
1956                return successResult();
1957            }
1958    
1959            AbstractEngineChannel* pEngineChannel =
1960                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
1961    
1962            RTList<ScriptEvent>::Iterator itCallback = pEngineChannel->ScriptCallbackByID(id);
1963            if (!itCallback)
1964                return successResult(CALLBACK_STATUS_TERMINATED);
1965    
1966            return successResult(
1967                (m_vm->m_event->execCtx == itCallback->execCtx) ?
1968                    CALLBACK_STATUS_RUNNING : CALLBACK_STATUS_QUEUE
1969            );
1970        }
1971    
1972      // wait() function (overrides core wait() implementation)      // wait() function (overrides core wait() implementation)
1973    
1974      InstrumentScriptVMFunction_wait::InstrumentScriptVMFunction_wait(InstrumentScriptVM* parent)      InstrumentScriptVMFunction_wait::InstrumentScriptVMFunction_wait(InstrumentScriptVM* parent)
# Line 1665  namespace LinuxSampler { Line 2015  namespace LinuxSampler {
2015          return successResult();          return successResult();
2016      }      }
2017    
2018        // abort() function
2019    
2020        InstrumentScriptVMFunction_abort::InstrumentScriptVMFunction_abort(InstrumentScriptVM* parent)
2021            : m_vm(parent)
2022        {
2023        }
2024    
2025        VMFnResult* InstrumentScriptVMFunction_abort::exec(VMFnArgs* args) {
2026            const script_callback_id_t id = args->arg(0)->asInt()->evalInt();
2027            if (!id) {
2028                wrnMsg("abort(): callback ID for argument 1 may not be zero");
2029                return successResult();
2030            }
2031    
2032            AbstractEngineChannel* pEngineChannel =
2033                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
2034    
2035            RTList<ScriptEvent>::Iterator itCallback = pEngineChannel->ScriptCallbackByID(id);
2036            if (!itCallback) return successResult(); // ignore if callback is i.e. not alive anymore
2037    
2038            itCallback->execCtx->signalAbort();
2039    
2040            return successResult();
2041        }
2042    
2043        // fork() function
2044    
2045        InstrumentScriptVMFunction_fork::InstrumentScriptVMFunction_fork(InstrumentScriptVM* parent)
2046            : m_vm(parent)
2047        {
2048        }
2049    
2050        VMFnResult* InstrumentScriptVMFunction_fork::exec(VMFnArgs* args) {
2051            // check if this is actually the parent going to fork, or rather one of
2052            // the children which is already forked
2053            if (m_vm->m_event->forkIndex != 0) { // this is the entry point for a child ...
2054                int forkResult = m_vm->m_event->forkIndex;
2055                // reset so that this child may i.e. also call fork() later on
2056                m_vm->m_event->forkIndex = 0;
2057                return successResult(forkResult);
2058            }
2059    
2060            // if we are here, then this is the parent, so we must fork this parent
2061    
2062            const int n =
2063                (args->argsCount() >= 1) ? args->arg(0)->asInt()->evalInt() : 1;
2064            const bool bAutoAbort =
2065                (args->argsCount() >= 2) ? args->arg(1)->asInt()->evalInt() : true;
2066    
2067            if (m_vm->m_event->countChildHandlers() + n > MAX_FORK_PER_SCRIPT_HANDLER) {
2068                wrnMsg("fork(): requested amount would exceed allowed limit per event handler");
2069                return successResult(-1);
2070            }
2071    
2072            AbstractEngineChannel* pEngineChannel =
2073                static_cast<AbstractEngineChannel*>(m_vm->m_event->cause.pEngineChannel);
2074    
2075            if (!pEngineChannel->hasFreeScriptCallbacks(n)) {
2076                wrnMsg("fork(): global limit of event handlers exceeded");
2077                return successResult(-1);
2078            }
2079    
2080            for (int iChild = 0; iChild < n; ++iChild) {
2081                RTList<ScriptEvent>::Iterator itChild =
2082                    pEngineChannel->forkScriptCallback(m_vm->m_event, bAutoAbort);
2083                if (!itChild) { // should never happen, otherwise its a bug ...
2084                    errMsg("fork(): internal error while allocating child");
2085                    return errorResult(-1); // terminate script
2086                }
2087                // since both parent, as well all child script execution instances
2088                // all land in this exect() method, the following is (more or less)
2089                // the only feature that lets us distinguish the parent and
2090                // respective children from each other in this exect() method
2091                itChild->forkIndex = iChild + 1;
2092            }
2093    
2094            return successResult(0);
2095        }
2096    
2097  } // namespace LinuxSampler  } // namespace LinuxSampler
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