/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVM.cpp
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revision 2594 by schoenebeck, Thu Jun 5 00:16:25 2014 UTC revision 3557 by schoenebeck, Sun Aug 18 00:06:04 2019 UTC
# Line 1  Line 1 
1  /*  /*
2   * Copyright (c) 2014 Christian Schoenebeck   * Copyright (c) 2014 - 2019 Christian Schoenebeck
3   *   *
4   * http://www.linuxsampler.org   * http://www.linuxsampler.org
5   *   *
# Line 7  Line 7 
7   * See README file for details.   * See README file for details.
8   */   */
9    
10    #include "../../common/global_private.h"
11  #include "InstrumentScriptVM.h"  #include "InstrumentScriptVM.h"
12  #include "../AbstractEngineChannel.h"  #include "../AbstractEngineChannel.h"
13    #include "../../common/global_private.h"
14    #include "AbstractInstrumentManager.h"
15    #include "MidiKeyboardManager.h"
16    #include "Fade.h"
17    
18  namespace LinuxSampler {  namespace LinuxSampler {
19    
20      // circumvents a bug in GCC 4.4 which prevents the sizeof() expr to be used      ///////////////////////////////////////////////////////////////////////
21      // directly within the scrope of a class (would throw a compiler error with:      // class 'EventGroup'
22      // "object missing in reference to 'LinuxSampler::AbstractEngineChannel::ControllerTable'")  
23      static const int _AbstractEngineChannel_ControllerTable_size = sizeof(AbstractEngineChannel::ControllerTable);      void EventGroup::insert(vmint eventID) {
24            if (contains(eventID)) return;
25      InstrumentScriptVM::InstrumentScriptVM() : m_event(NULL) {  
26          m_CC.size = _AbstractEngineChannel_ControllerTable_size;          AbstractEngine* pEngine = m_script->pEngineChannel->pEngine;
27          m_CC_NUM = DECLARE_VMINT(m_cause, class Event, Param.CC.Controller);  
28          m_EVENT_NOTE = DECLARE_VMINT(m_cause, class Event, Param.Note.Key);          // before adding the new event ID, check if there are any dead events
29          m_EVENT_VELOCITY = DECLARE_VMINT(m_cause, class Event, Param.Note.Velocity);          // and remove them in that case, before otherwise we might run in danger
30            // to run out of free space on this group for event IDs if a lot of
31            // events die before being removed explicitly from the group by script
32            //
33            // NOTE: or should we do this "dead ones" check only once in a while?
34            ssize_t firstDead = -1;
35            for (size_t i = 0; i < size(); ++i) {
36                if (firstDead >= 0) {
37                    if (pEngine->EventByID(eventID)) {
38                        remove(firstDead, i - firstDead);
39                        firstDead = -1;
40                    }
41                } else {
42                    if (!pEngine->EventByID(eventID)) firstDead = i;
43                }
44            }
45    
46            append(eventID);
47        }
48    
49        void EventGroup::erase(vmint eventID) {
50            size_t index = find(eventID);
51            remove(index);
52        }
53    
54        ///////////////////////////////////////////////////////////////////////
55        // class 'InstrumentScript'
56    
57        InstrumentScript::InstrumentScript(AbstractEngineChannel* pEngineChannel) {
58            parserContext = NULL;
59            bHasValidScript = false;
60            handlerInit = NULL;
61            handlerNote = NULL;
62            handlerRelease = NULL;
63            handlerController = NULL;
64            pEvents = NULL;
65            for (int i = 0; i < 128; ++i)
66                pKeyEvents[i] = NULL;
67            this->pEngineChannel = pEngineChannel;
68            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
69                eventGroups[i].setScript(this);
70        }
71    
72        InstrumentScript::~InstrumentScript() {
73            resetAll();
74            if (pEvents) {
75                for (int i = 0; i < 128; ++i) delete pKeyEvents[i];
76                delete pEvents;
77            }
78        }
79    
80        /** @brief Load real-time instrument script.
81         *
82         * Loads the real-time instrument script given by @a text on the engine
83         * channel this InstrumentScript object belongs to (defined by
84         * pEngineChannel member variable). The sampler engine's resource manager is
85         * used to allocate and share equivalent scripts on multiple engine
86         * channels.
87         *
88         * @param text - source code of script
89         */
90        void InstrumentScript::load(const String& text) {
91            dmsg(1,("Loading real-time instrument script ... "));
92    
93            // hand back old script reference and VM execution contexts
94            // (if not done already)
95            unload();
96    
97            code = text;
98    
99            AbstractInstrumentManager* pManager =
100                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
101    
102            // get new script reference
103            parserContext = pManager->scripts.Borrow(text, pEngineChannel);
104            if (!parserContext->errors().empty()) {
105                std::vector<ParserIssue> errors = parserContext->errors();
106                std::cerr << "[ScriptVM] Could not load instrument script, there were "
107                        << errors.size() << " parser errors:\n";
108                for (int i = 0; i < errors.size(); ++i)
109                    errors[i].dump();
110                return; // stop here if there were any parser errors
111            }
112    
113            handlerInit = parserContext->eventHandlerByName("init");
114            handlerNote = parserContext->eventHandlerByName("note");
115            handlerRelease = parserContext->eventHandlerByName("release");
116            handlerController = parserContext->eventHandlerByName("controller");
117            bHasValidScript =
118                handlerInit || handlerNote || handlerRelease || handlerController;
119    
120            // amount of script handlers each script event has to execute
121            int handlerExecCount = 0;
122            if (handlerNote || handlerRelease || handlerController) // only one of these are executed after "init" handler
123                handlerExecCount++;
124    
125            // create script event pool (if it doesn't exist already)
126            if (!pEvents) {
127                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
128                for (int i = 0; i < 128; ++i)
129                    pKeyEvents[i] = new RTList<ScriptEvent>(pEvents);
130                // reset RTAVLNode's tree node member variables after nodes are allocated
131                // (since we can't use a constructor right now, we do that initialization here)
132                while (!pEvents->poolIsEmpty()) {
133                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
134                    it->reset();
135                }
136                pEvents->clear();
137            }
138    
139            // create new VM execution contexts for new script
140            while (!pEvents->poolIsEmpty()) {
141                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
142                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
143                    parserContext
144                );
145                it->handlers = new VMEventHandler*[handlerExecCount+1];
146            }
147            pEvents->clear();
148    
149            dmsg(1,("Done\n"));
150        }
151    
152        /** @brief Unload real-time instrument script.
153         *
154         * Unloads the currently used real-time instrument script and frees all
155         * resources allocated for that script. The sampler engine's resource manager
156         * is used to share equivalent scripts among multiple sampler channels, and
157         * to deallocate the parsed script once not used on any engine channel
158         * anymore.
159         *
160         * Calling this method will however not clear the @c code member variable.
161         * Thus, the script can be parsed again afterwards.
162         */
163        void InstrumentScript::unload() {
164            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
165    
166            if (parserContext)
167                dmsg(1,("Unloading current instrument script.\n"));
168    
169            resetEvents();
170    
171            // free allocated VM execution contexts
172            if (pEvents) {
173                pEvents->clear();
174                while (!pEvents->poolIsEmpty()) {
175                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
176                    if (it->execCtx) {
177                        // free VM execution context object
178                        delete it->execCtx;
179                        it->execCtx = NULL;
180                        // free C array of handler pointers
181                        delete [] it->handlers;
182                    }
183                }
184                pEvents->clear();
185            }
186            // hand back VM representation of script
187            if (parserContext) {
188                AbstractInstrumentManager* pManager =
189                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
190    
191                pManager->scripts.HandBack(parserContext, pEngineChannel);
192                parserContext = NULL;
193                handlerInit = NULL;
194                handlerNote = NULL;
195                handlerRelease = NULL;
196                handlerController = NULL;
197            }
198            bHasValidScript = false;
199        }
200    
201        /**
202         * Same as unload(), but this one also empties the @c code member variable
203         * to an empty string.
204         */
205        void InstrumentScript::resetAll() {
206            unload();
207            code.clear();
208        }
209        
210        /**
211         * Clears all currently active script events. This should be called
212         * whenever the engine or engine channel was reset for some reason.
213         */
214        void InstrumentScript::resetEvents() {
215            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
216                eventGroups[i].clear();
217    
218            for (int i = 0; i < 128; ++i)
219                if (pKeyEvents[i])
220                    pKeyEvents[i]->clear();
221    
222            suspendedEvents.clear();
223    
224            if (pEvents) pEvents->clear();
225        }
226    
227        ///////////////////////////////////////////////////////////////////////
228        // class 'InstrumentScriptVM'
229    
230        InstrumentScriptVM::InstrumentScriptVM() :
231            m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
232            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
233            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
234            m_fnChangeVol(this), m_fnChangeVolTime(this),
235            m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this),
236            m_fnChangePanTime(this), m_fnChangePanCurve(this),
237            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
238            m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this),
239            m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this),
240            m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this),
241            m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this),
242            m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this),
243            m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this),
244            m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this),
245            m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this),
246            m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this),
247            m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this),
248            m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this),
249            m_fnCallbackStatus(this),
250            m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this),
251            m_varCallbackChildID(this)
252        {
253            m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
254            m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
255            m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
256            m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key);
257            m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity);
258            m_KEY_DOWN.size = 128;
259            m_KEY_DOWN.readonly = true;
260            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
261            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
262            m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID);
263      }      }
264    
265      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 29  namespace LinuxSampler { Line 267  namespace LinuxSampler {
267              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
268    
269          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
270          m_cause = &event->cause;          m_event = event;
271          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
272            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
273    
274          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
275          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
276          // table with new CC value in case of a controller event, because the          // table with new CC value in case of a controller event, because the
277          // script might access the new CC value          // script might access the new CC value
278          if (!event->executionSlices) {          if (!event->executionSlices) {
279              switch (m_cause->Type) {              switch (event->cause.Type) {
280                  case Event::type_control_change:                  case Event::type_control_change:
281                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
282                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
283                      break;                      break;
284                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
285                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
286                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
287                      break;                      break;
288                  case Event::type_pitchbend:                  case Event::type_pitchbend:
289                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
290                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
291                      break;                      break;
292                    default:
293                        ; // noop
294              }              }
295          }          }
296    
297          // run the script handler(s)          // run the script handler(s)
298          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;
299          while (event->handlers[event->currentHandler]) {          for ( ; event->handlers[event->currentHandler]; event->currentHandler++) {
300              res = ScriptVM::exec(              res = ScriptVM::exec(
301                  parserCtx, event->execCtx, event->handlers[event->currentHandler++]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
302              );              );
303              event->executionSlices++;              event->executionSlices++;
304                if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ...
305                    // check if this script handler instance has any forked children
306                    // to be auto aborted
307                    for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER &&
308                         event->childHandlerID[iChild]; ++iChild)
309                    {
310                        RTList<ScriptEvent>::Iterator itChild =
311                            pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]);
312                        if (itChild && itChild->autoAbortByParent)
313                            itChild->execCtx->signalAbort();
314                    }
315                }
316              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
317          }          }
318    
319          return res;          return res;
320      }      }
321    
322      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() {
323          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
324          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables();
325    
326          // now add own built-in variables          // now add own built-in variables
327          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
328            m["$EVENT_ID"] = &m_EVENT_ID;
329          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
330          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
331  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
332            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
333            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
334            m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID;
335    
336          return m;          return m;
337      }      }
338    
339      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
340          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
341          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
342    
343          // now add own built-in variables          // now add own built-in variables
344          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
345          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
346          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
347    
348          return m;          return m;
349      }      }
350    
351      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() {
352          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
353          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,vmint> m = ScriptVM::builtInConstIntVariables();
354    
355            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
356            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
357          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
358          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
359            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
360                m["$MARK_" + ToString(i+1)] = i;
361            }
362            m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE;
363            m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY;
364            m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME;
365            m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE;
366            m["$EVENT_PAR_0"] = EVENT_PAR_0;
367            m["$EVENT_PAR_1"] = EVENT_PAR_1;
368            m["$EVENT_PAR_2"] = EVENT_PAR_2;
369            m["$EVENT_PAR_3"] = EVENT_PAR_3;
370            m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR;
371            m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT;
372            m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED;
373            m["$CALLBACK_STATUS_QUEUE"]      = CALLBACK_STATUS_QUEUE;
374            m["$CALLBACK_STATUS_RUNNING"]    = CALLBACK_STATUS_RUNNING;
375    
376          return m;          return m;
377      }      }
378    
379        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
380            // first get built-in dynamic variables of derived VM class
381            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
382    
383            m["%ALL_EVENTS"] = &m_varAllEvents;
384            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
385            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
386            m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID;
387    
388            return m;
389        }
390    
391        VMFunction* InstrumentScriptVM::functionByName(const String& name) {
392            // built-in script functions of this class
393            if      (name == "play_note") return &m_fnPlayNote;
394            else if (name == "set_controller") return &m_fnSetController;
395            else if (name == "ignore_event") return &m_fnIgnoreEvent;
396            else if (name == "ignore_controller") return &m_fnIgnoreController;
397            else if (name == "note_off") return &m_fnNoteOff;
398            else if (name == "set_event_mark") return &m_fnSetEventMark;
399            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
400            else if (name == "by_marks") return &m_fnByMarks;
401            else if (name == "change_vol") return &m_fnChangeVol;
402            else if (name == "change_vol_time") return &m_fnChangeVolTime;
403            else if (name == "change_tune") return &m_fnChangeTune;
404            else if (name == "change_tune_time") return &m_fnChangeTuneTime;
405            else if (name == "change_note") return &m_fnChangeNote;
406            else if (name == "change_velo") return &m_fnChangeVelo;
407            else if (name == "change_pan") return &m_fnChangePan;
408            else if (name == "change_pan_time") return &m_fnChangePanTime;
409            else if (name == "change_pan_curve") return &m_fnChangePanCurve;
410            else if (name == "change_cutoff") return &m_fnChangeCutoff;
411            else if (name == "change_reso") return &m_fnChangeReso;
412            else if (name == "change_attack") return &m_fnChangeAttack;
413            else if (name == "change_decay") return &m_fnChangeDecay;
414            else if (name == "change_sustain") return &m_fnChangeSustain;
415            else if (name == "change_release") return &m_fnChangeRelease;
416            else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack;
417            else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay;
418            else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain;
419            else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease;
420            else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth;
421            else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq;
422            else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth;
423            else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq;
424            else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth;
425            else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq;
426            else if (name == "fade_in") return &m_fnFadeIn;
427            else if (name == "fade_out") return &m_fnFadeOut;
428            else if (name == "change_vol_curve") return &m_fnChangeVolCurve;
429            else if (name == "change_tune_curve") return &m_fnChangeTuneCurve;
430            else if (name == "change_play_pos") return &m_fnChangePlayPos;
431            else if (name == "get_event_par") return &m_fnGetEventPar;
432            else if (name == "set_event_par") return &m_fnSetEventPar;
433            else if (name == "event_status") return &m_fnEventStatus;
434            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
435            else if (name == "stop_wait") return &m_fnStopWait;
436            else if (name == "abort") return &m_fnAbort;
437            else if (name == "fork") return &m_fnFork;
438            else if (name == "callback_status") return &m_fnCallbackStatus;
439    
440            // built-in script functions of derived VM class
441            return ScriptVM::functionByName(name);
442        }
443    
444  } // namespace LinuxSampler  } // namespace LinuxSampler
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