/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVM.cpp
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revision 2596 by schoenebeck, Thu Jun 5 19:39:12 2014 UTC revision 3691 by schoenebeck, Fri Jan 3 12:35:20 2020 UTC
# Line 1  Line 1 
1  /*  /*
2   * Copyright (c) 2014 Christian Schoenebeck   * Copyright (c) 2014 - 2020 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.x which causes a sizeof() expression applied      ///////////////////////////////////////////////////////////////////////
21      // on a class member to throw a compiler error, i.e. with GCC 4.4:      // class 'EventGroup'
22      // "object missing in reference to 'LinuxSampler::AbstractEngineChannel::ControllerTable'")  
23      // or with GCC 4.0:      void EventGroup::insert(vmint eventID) {
24      // "invalid use of non-static data member 'LinuxSampler::AbstractEngineChannel::ControllerTable'"          if (contains(eventID)) return;
25      #define _MEMBER_SIZEOF(T_Class, Member) sizeof(((T_Class*)NULL)->Member)  
26            AbstractEngine* pEngine = m_script->pEngineChannel->pEngine;
27    
28            // before adding the new event ID, check if there are any dead events
29            // 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            handlerRpn = NULL;
65            handlerNrpn = NULL;
66            pEvents = NULL;
67            for (int i = 0; i < 128; ++i)
68                pKeyEvents[i] = NULL;
69            this->pEngineChannel = pEngineChannel;
70            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
71                eventGroups[i].setScript(this);
72        }
73    
74        InstrumentScript::~InstrumentScript() {
75            resetAll();
76            if (pEvents) {
77                for (int i = 0; i < 128; ++i) delete pKeyEvents[i];
78                delete pEvents;
79            }
80        }
81    
82        /** @brief Load real-time instrument script.
83         *
84         * Loads the real-time instrument script given by @a text on the engine
85         * channel this InstrumentScript object belongs to (defined by
86         * pEngineChannel member variable). The sampler engine's resource manager is
87         * used to allocate and share equivalent scripts on multiple engine
88         * channels.
89         *
90         * @param text - source code of script
91         */
92        void InstrumentScript::load(const String& text) {
93            dmsg(1,("Loading real-time instrument script ... "));
94    
95            // hand back old script reference and VM execution contexts
96            // (if not done already)
97            unload();
98    
99            code = text;
100    
101            AbstractInstrumentManager* pManager =
102                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
103    
104            // get new script reference
105            parserContext = pManager->scripts.Borrow(text, pEngineChannel);
106            if (!parserContext->errors().empty()) {
107                std::vector<ParserIssue> errors = parserContext->errors();
108                std::cerr << "[ScriptVM] Could not load instrument script, there were "
109                        << errors.size() << " parser errors:\n";
110                for (int i = 0; i < errors.size(); ++i)
111                    errors[i].dump();
112                return; // stop here if there were any parser errors
113            }
114    
115            handlerInit = parserContext->eventHandlerByName("init");
116            handlerNote = parserContext->eventHandlerByName("note");
117            handlerRelease = parserContext->eventHandlerByName("release");
118            handlerController = parserContext->eventHandlerByName("controller");
119            handlerRpn = parserContext->eventHandlerByName("rpn");
120            handlerNrpn = parserContext->eventHandlerByName("nrpn");
121            bHasValidScript =
122                handlerInit || handlerNote || handlerRelease || handlerController ||
123                handlerRpn || handlerNrpn;
124    
125            // amount of script handlers each script event has to execute
126            int handlerExecCount = 0;
127            if (handlerNote || handlerRelease || handlerController || handlerRpn ||
128                handlerNrpn) // only one of these are executed after "init" handler
129                handlerExecCount++;
130    
131            // create script event pool (if it doesn't exist already)
132            if (!pEvents) {
133                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
134                for (int i = 0; i < 128; ++i)
135                    pKeyEvents[i] = new RTList<ScriptEvent>(pEvents);
136                // reset RTAVLNode's tree node member variables after nodes are allocated
137                // (since we can't use a constructor right now, we do that initialization here)
138                while (!pEvents->poolIsEmpty()) {
139                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
140                    it->reset();
141                }
142                pEvents->clear();
143            }
144    
145            // create new VM execution contexts for new script
146            while (!pEvents->poolIsEmpty()) {
147                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
148                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
149                    parserContext
150                );
151                it->handlers = new VMEventHandler*[handlerExecCount+1];
152            }
153            pEvents->clear();
154    
155            dmsg(1,("Done\n"));
156        }
157    
158        /** @brief Unload real-time instrument script.
159         *
160         * Unloads the currently used real-time instrument script and frees all
161         * resources allocated for that script. The sampler engine's resource manager
162         * is used to share equivalent scripts among multiple sampler channels, and
163         * to deallocate the parsed script once not used on any engine channel
164         * anymore.
165         *
166         * Calling this method will however not clear the @c code member variable.
167         * Thus, the script can be parsed again afterwards.
168         */
169        void InstrumentScript::unload() {
170            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
171    
172            if (parserContext)
173                dmsg(1,("Unloading current instrument script.\n"));
174    
175            resetEvents();
176    
177            // free allocated VM execution contexts
178            if (pEvents) {
179                pEvents->clear();
180                while (!pEvents->poolIsEmpty()) {
181                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
182                    if (it->execCtx) {
183                        // free VM execution context object
184                        delete it->execCtx;
185                        it->execCtx = NULL;
186                        // free C array of handler pointers
187                        delete [] it->handlers;
188                    }
189                }
190                pEvents->clear();
191            }
192            // hand back VM representation of script
193            if (parserContext) {
194                AbstractInstrumentManager* pManager =
195                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
196    
197                pManager->scripts.HandBack(parserContext, pEngineChannel);
198                parserContext = NULL;
199                handlerInit = NULL;
200                handlerNote = NULL;
201                handlerRelease = NULL;
202                handlerController = NULL;
203                handlerRpn = NULL;
204                handlerNrpn = NULL;
205            }
206            bHasValidScript = false;
207        }
208    
209        /**
210         * Same as unload(), but this one also empties the @c code member variable
211         * to an empty string.
212         */
213        void InstrumentScript::resetAll() {
214            unload();
215            code.clear();
216        }
217        
218        /**
219         * Clears all currently active script events. This should be called
220         * whenever the engine or engine channel was reset for some reason.
221         */
222        void InstrumentScript::resetEvents() {
223            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
224                eventGroups[i].clear();
225    
226            for (int i = 0; i < 128; ++i)
227                if (pKeyEvents[i])
228                    pKeyEvents[i]->clear();
229    
230            suspendedEvents.clear();
231    
232            if (pEvents) pEvents->clear();
233        }
234    
235        ///////////////////////////////////////////////////////////////////////
236        // class 'InstrumentScriptVM'
237    
238      InstrumentScriptVM::InstrumentScriptVM() :      InstrumentScriptVM::InstrumentScriptVM() :
239          m_event(NULL), m_fnPlayNote(this)          m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
240            m_fnSetRpn(this), m_fnSetNrpn(this),
241            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
242            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
243            m_fnChangeVol(this), m_fnChangeVolTime(this),
244            m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this),
245            m_fnChangePanTime(this), m_fnChangePanCurve(this),
246            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
247            m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this),
248            m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this),
249            m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this),
250            m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this),
251            m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this),
252            m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this),
253            m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this),
254            m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this),
255            m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this),
256            m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this),
257            m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this),
258            m_fnCallbackStatus(this),
259            m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this),
260            m_varCallbackChildID(this)
261      {      {
262          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
263          m_CC_NUM = DECLARE_VMINT(m_cause, class Event, Param.CC.Controller);          m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
264          m_EVENT_NOTE = DECLARE_VMINT(m_cause, class Event, Param.Note.Key);          m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
265          m_EVENT_VELOCITY = DECLARE_VMINT(m_cause, class Event, Param.Note.Velocity);          m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key);
266            m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity);
267            m_RPN_ADDRESS = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Parameter);
268            m_RPN_VALUE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Value);
269            m_KEY_DOWN.size = 128;
270            m_KEY_DOWN.readonly = true;
271            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
272            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
273            m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID);
274      }      }
275    
276      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 33  namespace LinuxSampler { Line 278  namespace LinuxSampler {
278              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
279    
280          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
281          m_cause = &event->cause;          m_event = event;
282          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
283            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
284    
285          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
286          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
287          // 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
288          // script might access the new CC value          // script might access the new CC value
289          if (!event->executionSlices) {          if (!event->executionSlices) {
290              switch (m_cause->Type) {              switch (event->cause.Type) {
291                  case Event::type_control_change:                  case Event::type_control_change:
292                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
293                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
294                      break;                      break;
295                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
296                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
297                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
298                      break;                      break;
299                  case Event::type_pitchbend:                  case Event::type_pitchbend:
300                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
301                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
302                      break;                      break;
303                    default:
304                        ; // noop
305              }              }
306          }          }
307    
# Line 64  namespace LinuxSampler { Line 312  namespace LinuxSampler {
312                  parserCtx, event->execCtx, event->handlers[event->currentHandler]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
313              );              );
314              event->executionSlices++;              event->executionSlices++;
315                if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ...
316                    // check if this script handler instance has any forked children
317                    // to be auto aborted
318                    for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER &&
319                         event->childHandlerID[iChild]; ++iChild)
320                    {
321                        RTList<ScriptEvent>::Iterator itChild =
322                            pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]);
323                        if (itChild && itChild->autoAbortByParent)
324                            itChild->execCtx->signalAbort();
325                    }
326                }
327              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
328          }          }
329    
330          return res;          return res;
331      }      }
332    
333      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() {
334          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
335          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables();
336    
337          // now add own built-in variables          // now add own built-in variables
338          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
339            m["$EVENT_ID"] = &m_EVENT_ID;
340          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
341          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
342  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
343            m["$RPN_ADDRESS"] = &m_RPN_ADDRESS; // used for both RPN and NRPN events
344            m["$RPN_VALUE"] = &m_RPN_VALUE;     // used for both RPN and NRPN events
345            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
346            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
347            m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID;
348    
349          return m;          return m;
350      }      }
351    
352      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
353          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
354          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
355    
356          // now add own built-in variables          // now add own built-in variables
357          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
358          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
359          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
360    
361          return m;          return m;
362      }      }
363    
364      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() {
365          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
366          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,vmint> m = ScriptVM::builtInConstIntVariables();
367    
368            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
369            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
370          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
371          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
372            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
373                m["$MARK_" + ToString(i+1)] = i;
374            }
375            m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE;
376            m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY;
377            m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME;
378            m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE;
379            m["$EVENT_PAR_0"] = EVENT_PAR_0;
380            m["$EVENT_PAR_1"] = EVENT_PAR_1;
381            m["$EVENT_PAR_2"] = EVENT_PAR_2;
382            m["$EVENT_PAR_3"] = EVENT_PAR_3;
383            m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR;
384            m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT;
385            m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED;
386            m["$CALLBACK_STATUS_QUEUE"]      = CALLBACK_STATUS_QUEUE;
387            m["$CALLBACK_STATUS_RUNNING"]    = CALLBACK_STATUS_RUNNING;
388    
389            return m;
390        }
391    
392        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
393            // first get built-in dynamic variables of derived VM class
394            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
395    
396            m["%ALL_EVENTS"] = &m_varAllEvents;
397            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
398            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
399            m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID;
400    
401          return m;          return m;
402      }      }
403    
404      VMFunction* InstrumentScriptVM::functionByName(const String& name) {      VMFunction* InstrumentScriptVM::functionByName(const String& name) {
405          // built-in script functions of this class          // built-in script functions of this class
406          if (name == "play_note") return &m_fnPlayNote;          if      (name == "play_note") return &m_fnPlayNote;
407            else if (name == "set_controller") return &m_fnSetController;
408            else if (name == "set_rpn") return &m_fnSetRpn;
409            else if (name == "set_nrpn") return &m_fnSetNrpn;
410            else if (name == "ignore_event") return &m_fnIgnoreEvent;
411            else if (name == "ignore_controller") return &m_fnIgnoreController;
412            else if (name == "note_off") return &m_fnNoteOff;
413            else if (name == "set_event_mark") return &m_fnSetEventMark;
414            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
415            else if (name == "by_marks") return &m_fnByMarks;
416            else if (name == "change_vol") return &m_fnChangeVol;
417            else if (name == "change_vol_time") return &m_fnChangeVolTime;
418            else if (name == "change_tune") return &m_fnChangeTune;
419            else if (name == "change_tune_time") return &m_fnChangeTuneTime;
420            else if (name == "change_note") return &m_fnChangeNote;
421            else if (name == "change_velo") return &m_fnChangeVelo;
422            else if (name == "change_pan") return &m_fnChangePan;
423            else if (name == "change_pan_time") return &m_fnChangePanTime;
424            else if (name == "change_pan_curve") return &m_fnChangePanCurve;
425            else if (name == "change_cutoff") return &m_fnChangeCutoff;
426            else if (name == "change_reso") return &m_fnChangeReso;
427            else if (name == "change_attack") return &m_fnChangeAttack;
428            else if (name == "change_decay") return &m_fnChangeDecay;
429            else if (name == "change_sustain") return &m_fnChangeSustain;
430            else if (name == "change_release") return &m_fnChangeRelease;
431            else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack;
432            else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay;
433            else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain;
434            else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease;
435            else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth;
436            else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq;
437            else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth;
438            else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq;
439            else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth;
440            else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq;
441            else if (name == "fade_in") return &m_fnFadeIn;
442            else if (name == "fade_out") return &m_fnFadeOut;
443            else if (name == "change_vol_curve") return &m_fnChangeVolCurve;
444            else if (name == "change_tune_curve") return &m_fnChangeTuneCurve;
445            else if (name == "change_play_pos") return &m_fnChangePlayPos;
446            else if (name == "get_event_par") return &m_fnGetEventPar;
447            else if (name == "set_event_par") return &m_fnSetEventPar;
448            else if (name == "event_status") return &m_fnEventStatus;
449            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
450            else if (name == "stop_wait") return &m_fnStopWait;
451            else if (name == "abort") return &m_fnAbort;
452            else if (name == "fork") return &m_fnFork;
453            else if (name == "callback_status") return &m_fnCallbackStatus;
454    
455          // built-in script functions of derived VM class          // built-in script functions of derived VM class
456          return ScriptVM::functionByName(name);          return ScriptVM::functionByName(name);
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