/[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 3733 by schoenebeck, Sat Feb 1 18:11:20 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 4.4 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            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         * @param patchVars - 'patch' variables being overridden by instrument
92         */
93        void InstrumentScript::load(const String& text,
94                                    const std::map<String,String>& patchVars)
95        {
96            dmsg(1,("Loading real-time instrument script ... "));
97    
98            // hand back old script reference and VM execution contexts
99            // (if not done already)
100            unload();
101    
102            code = text;
103    
104            AbstractInstrumentManager* pManager =
105                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
106    
107            // get new script reference
108            parserContext = pManager->scripts.Borrow(
109                { .code = text, .patchVars = patchVars }, pEngineChannel
110            );
111            if (!parserContext->errors().empty()) {
112                std::vector<ParserIssue> errors = parserContext->errors();
113                std::cerr << "[ScriptVM] Could not load instrument script, there were "
114                        << errors.size() << " parser errors:\n";
115                for (int i = 0; i < errors.size(); ++i)
116                    errors[i].dump();
117                return; // stop here if there were any parser errors
118            }
119    
120            handlerInit = parserContext->eventHandlerByName("init");
121            handlerNote = parserContext->eventHandlerByName("note");
122            handlerRelease = parserContext->eventHandlerByName("release");
123            handlerController = parserContext->eventHandlerByName("controller");
124            handlerRpn = parserContext->eventHandlerByName("rpn");
125            handlerNrpn = parserContext->eventHandlerByName("nrpn");
126            bHasValidScript =
127                handlerInit || handlerNote || handlerRelease || handlerController ||
128                handlerRpn || handlerNrpn;
129    
130            // amount of script handlers each script event has to execute
131            int handlerExecCount = 0;
132            if (handlerNote || handlerRelease || handlerController || handlerRpn ||
133                handlerNrpn) // only one of these are executed after "init" handler
134                handlerExecCount++;
135    
136            // create script event pool (if it doesn't exist already)
137            if (!pEvents) {
138                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
139                for (int i = 0; i < 128; ++i)
140                    pKeyEvents[i] = new RTList<ScriptEvent>(pEvents);
141                // reset RTAVLNode's tree node member variables after nodes are allocated
142                // (since we can't use a constructor right now, we do that initialization here)
143                while (!pEvents->poolIsEmpty()) {
144                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
145                    it->reset();
146                }
147                pEvents->clear();
148            }
149    
150            // create new VM execution contexts for new script
151            while (!pEvents->poolIsEmpty()) {
152                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
153                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
154                    parserContext
155                );
156                it->handlers = new VMEventHandler*[handlerExecCount+1];
157            }
158            pEvents->clear();
159    
160            dmsg(1,("Done\n"));
161        }
162    
163        /** @brief Unload real-time instrument script.
164         *
165         * Unloads the currently used real-time instrument script and frees all
166         * resources allocated for that script. The sampler engine's resource manager
167         * is used to share equivalent scripts among multiple sampler channels, and
168         * to deallocate the parsed script once not used on any engine channel
169         * anymore.
170         *
171         * Calling this method will however not clear the @c code member variable.
172         * Thus, the script can be parsed again afterwards.
173         */
174        void InstrumentScript::unload() {
175            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
176    
177            if (parserContext)
178                dmsg(1,("Unloading current instrument script.\n"));
179    
180            resetEvents();
181    
182            // free allocated VM execution contexts
183            if (pEvents) {
184                pEvents->clear();
185                while (!pEvents->poolIsEmpty()) {
186                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
187                    if (it->execCtx) {
188                        // free VM execution context object
189                        delete it->execCtx;
190                        it->execCtx = NULL;
191                        // free C array of handler pointers
192                        delete [] it->handlers;
193                    }
194                }
195                pEvents->clear();
196            }
197            // hand back VM representation of script
198            if (parserContext) {
199                AbstractInstrumentManager* pManager =
200                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
201    
202                pManager->scripts.HandBack(parserContext, pEngineChannel);
203                parserContext = NULL;
204                handlerInit = NULL;
205                handlerNote = NULL;
206                handlerRelease = NULL;
207                handlerController = NULL;
208                handlerRpn = NULL;
209                handlerNrpn = NULL;
210            }
211            bHasValidScript = false;
212        }
213    
214        /**
215         * Same as unload(), but this one also empties the @c code member variable
216         * to an empty string.
217         */
218        void InstrumentScript::resetAll() {
219            unload();
220            code.clear();
221        }
222        
223        /**
224         * Clears all currently active script events. This should be called
225         * whenever the engine or engine channel was reset for some reason.
226         */
227        void InstrumentScript::resetEvents() {
228            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
229                eventGroups[i].clear();
230    
231            for (int i = 0; i < 128; ++i)
232                if (pKeyEvents[i])
233                    pKeyEvents[i]->clear();
234    
235            suspendedEvents.clear();
236    
237            if (pEvents) pEvents->clear();
238        }
239    
240        ///////////////////////////////////////////////////////////////////////
241        // class 'InstrumentScriptVM'
242    
243        InstrumentScriptVM::InstrumentScriptVM() :
244            m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
245            m_fnSetRpn(this), m_fnSetNrpn(this),
246            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
247            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
248            m_fnChangeVol(this), m_fnChangeVolTime(this),
249            m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this),
250            m_fnChangePanTime(this), m_fnChangePanCurve(this),
251            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
252            m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this),
253            m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this),
254            m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this),
255            m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this),
256            m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this),
257            m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this),
258            m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this),
259            m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this),
260            m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this),
261            m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this),
262            m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this),
263            m_fnCallbackStatus(this),
264            m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this),
265            m_varCallbackChildID(this)
266        {
267            m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
268            m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
269            m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
270            m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key);
271            m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity);
272            m_RPN_ADDRESS = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Parameter);
273            m_RPN_VALUE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Value);
274            m_KEY_DOWN.size = 128;
275            m_KEY_DOWN.readonly = true;
276            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
277            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
278            m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID);
279      }      }
280    
281      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 29  namespace LinuxSampler { Line 283  namespace LinuxSampler {
283              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
284    
285          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
286          m_cause = &event->cause;          m_event = event;
287          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
288            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
289    
290          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
291          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
292          // 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
293          // script might access the new CC value          // script might access the new CC value
294          if (!event->executionSlices) {          if (!event->executionSlices) {
295              switch (m_cause->Type) {              switch (event->cause.Type) {
296                  case Event::type_control_change:                  case Event::type_control_change:
297                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
298                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
299                      break;                      break;
300                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
301                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
302                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
303                      break;                      break;
304                  case Event::type_pitchbend:                  case Event::type_pitchbend:
305                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
306                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
307                      break;                      break;
308                    default:
309                        ; // noop
310              }              }
311          }          }
312    
313          // run the script handler(s)          // run the script handler(s)
314          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;
315          while (event->handlers[event->currentHandler]) {          for ( ; event->handlers[event->currentHandler]; event->currentHandler++) {
316              res = ScriptVM::exec(              res = ScriptVM::exec(
317                  parserCtx, event->execCtx, event->handlers[event->currentHandler++]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
318              );              );
319              event->executionSlices++;              event->executionSlices++;
320                if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ...
321                    // check if this script handler instance has any forked children
322                    // to be auto aborted
323                    for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER &&
324                         event->childHandlerID[iChild]; ++iChild)
325                    {
326                        RTList<ScriptEvent>::Iterator itChild =
327                            pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]);
328                        if (itChild && itChild->autoAbortByParent)
329                            itChild->execCtx->signalAbort();
330                    }
331                }
332              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
333          }          }
334    
335          return res;          return res;
336      }      }
337    
338      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() {
339          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
340          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables();
341    
342          // now add own built-in variables          // now add own built-in variables
343          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
344            m["$EVENT_ID"] = &m_EVENT_ID;
345          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
346          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
347  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
348            m["$RPN_ADDRESS"] = &m_RPN_ADDRESS; // used for both RPN and NRPN events
349            m["$RPN_VALUE"] = &m_RPN_VALUE;     // used for both RPN and NRPN events
350            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
351            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
352            m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID;
353    
354          return m;          return m;
355      }      }
356    
357      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
358          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
359          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
360    
361          // now add own built-in variables          // now add own built-in variables
362          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
363          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
364          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
365    
366          return m;          return m;
367      }      }
368    
369      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() {
370          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
371          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,vmint> m = ScriptVM::builtInConstIntVariables();
372    
373            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
374            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
375          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
376          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
377            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
378                m["$MARK_" + ToString(i+1)] = i;
379            }
380            m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE;
381            m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY;
382            m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME;
383            m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE;
384            m["$EVENT_PAR_0"] = EVENT_PAR_0;
385            m["$EVENT_PAR_1"] = EVENT_PAR_1;
386            m["$EVENT_PAR_2"] = EVENT_PAR_2;
387            m["$EVENT_PAR_3"] = EVENT_PAR_3;
388            m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR;
389            m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT;
390            m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED;
391            m["$CALLBACK_STATUS_QUEUE"]      = CALLBACK_STATUS_QUEUE;
392            m["$CALLBACK_STATUS_RUNNING"]    = CALLBACK_STATUS_RUNNING;
393    
394          return m;          return m;
395      }      }
396    
397        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
398            // first get built-in dynamic variables of derived VM class
399            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
400    
401            m["%ALL_EVENTS"] = &m_varAllEvents;
402            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
403            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
404            m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID;
405    
406            return m;
407        }
408    
409        VMFunction* InstrumentScriptVM::functionByName(const String& name) {
410            // built-in script functions of this class
411            if      (name == "play_note") return &m_fnPlayNote;
412            else if (name == "set_controller") return &m_fnSetController;
413            else if (name == "set_rpn") return &m_fnSetRpn;
414            else if (name == "set_nrpn") return &m_fnSetNrpn;
415            else if (name == "ignore_event") return &m_fnIgnoreEvent;
416            else if (name == "ignore_controller") return &m_fnIgnoreController;
417            else if (name == "note_off") return &m_fnNoteOff;
418            else if (name == "set_event_mark") return &m_fnSetEventMark;
419            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
420            else if (name == "by_marks") return &m_fnByMarks;
421            else if (name == "change_vol") return &m_fnChangeVol;
422            else if (name == "change_vol_time") return &m_fnChangeVolTime;
423            else if (name == "change_tune") return &m_fnChangeTune;
424            else if (name == "change_tune_time") return &m_fnChangeTuneTime;
425            else if (name == "change_note") return &m_fnChangeNote;
426            else if (name == "change_velo") return &m_fnChangeVelo;
427            else if (name == "change_pan") return &m_fnChangePan;
428            else if (name == "change_pan_time") return &m_fnChangePanTime;
429            else if (name == "change_pan_curve") return &m_fnChangePanCurve;
430            else if (name == "change_cutoff") return &m_fnChangeCutoff;
431            else if (name == "change_reso") return &m_fnChangeReso;
432            else if (name == "change_attack") return &m_fnChangeAttack;
433            else if (name == "change_decay") return &m_fnChangeDecay;
434            else if (name == "change_sustain") return &m_fnChangeSustain;
435            else if (name == "change_release") return &m_fnChangeRelease;
436            else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack;
437            else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay;
438            else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain;
439            else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease;
440            else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth;
441            else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq;
442            else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth;
443            else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq;
444            else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth;
445            else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq;
446            else if (name == "fade_in") return &m_fnFadeIn;
447            else if (name == "fade_out") return &m_fnFadeOut;
448            else if (name == "change_vol_curve") return &m_fnChangeVolCurve;
449            else if (name == "change_tune_curve") return &m_fnChangeTuneCurve;
450            else if (name == "change_play_pos") return &m_fnChangePlayPos;
451            else if (name == "get_event_par") return &m_fnGetEventPar;
452            else if (name == "set_event_par") return &m_fnSetEventPar;
453            else if (name == "event_status") return &m_fnEventStatus;
454            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
455            else if (name == "stop_wait") return &m_fnStopWait;
456            else if (name == "abort") return &m_fnAbort;
457            else if (name == "fork") return &m_fnFork;
458            else if (name == "callback_status") return &m_fnCallbackStatus;
459    
460            // built-in script functions of derived VM class
461            return ScriptVM::functionByName(name);
462        }
463    
464  } // namespace LinuxSampler  } // namespace LinuxSampler
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