/[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 3848 by schoenebeck, Thu Jan 7 13:52:46 2021 UTC
# Line 1  Line 1 
1  /*  /*
2   * Copyright (c) 2014 Christian Schoenebeck   * Copyright (c) 2014 - 2021 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            if (firstDead >= 0)
46                remove(firstDead, size() - firstDead);
47    
48            append(eventID);
49        }
50    
51        void EventGroup::erase(vmint eventID) {
52            size_t index = find(eventID);
53            remove(index);
54        }
55    
56        ///////////////////////////////////////////////////////////////////////
57        // class 'InstrumentScript'
58    
59        InstrumentScript::InstrumentScript(AbstractEngineChannel* pEngineChannel) {
60            parserContext = NULL;
61            bHasValidScript = false;
62            handlerInit = NULL;
63            handlerNote = NULL;
64            handlerRelease = NULL;
65            handlerController = NULL;
66            handlerRpn = NULL;
67            handlerNrpn = NULL;
68            pEvents = NULL;
69            for (int i = 0; i < 128; ++i)
70                pKeyEvents[i] = NULL;
71            this->pEngineChannel = pEngineChannel;
72            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
73                eventGroups[i].setScript(this);
74        }
75    
76        InstrumentScript::~InstrumentScript() {
77            resetAll();
78            if (pEvents) {
79                for (int i = 0; i < 128; ++i) delete pKeyEvents[i];
80                delete pEvents;
81            }
82        }
83    
84        /** @brief Load real-time instrument script.
85         *
86         * Loads the real-time instrument script given by @a text on the engine
87         * channel this InstrumentScript object belongs to (defined by
88         * pEngineChannel member variable). The sampler engine's resource manager is
89         * used to allocate and share equivalent scripts on multiple engine
90         * channels.
91         *
92         * @param text - source code of script
93         * @param patchVars - 'patch' variables being overridden by instrument
94         */
95        void InstrumentScript::load(const String& text,
96                                    const std::map<String,String>& patchVars)
97        {
98            dmsg(1,("Loading real-time instrument script ... "));
99    
100            // hand back old script reference and VM execution contexts
101            // (if not done already)
102            unload();
103    
104            code = text;
105    
106            AbstractInstrumentManager* pManager =
107                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
108    
109            // get new script reference
110            parserContext = pManager->scripts.Borrow(
111                { .code = text, .patchVars = patchVars }, pEngineChannel
112            );
113            if (!parserContext->errors().empty()) {
114                std::vector<ParserIssue> errors = parserContext->errors();
115                std::cerr << "[ScriptVM] Could not load instrument script, there were "
116                        << errors.size() << " parser errors:\n";
117                for (int i = 0; i < errors.size(); ++i)
118                    errors[i].dump();
119                return; // stop here if there were any parser errors
120            }
121    
122            handlerInit = parserContext->eventHandlerByName("init");
123            handlerNote = parserContext->eventHandlerByName("note");
124            handlerRelease = parserContext->eventHandlerByName("release");
125            handlerController = parserContext->eventHandlerByName("controller");
126            handlerRpn = parserContext->eventHandlerByName("rpn");
127            handlerNrpn = parserContext->eventHandlerByName("nrpn");
128            bHasValidScript =
129                handlerInit || handlerNote || handlerRelease || handlerController ||
130                handlerRpn || handlerNrpn;
131    
132            // amount of script handlers each script event has to execute
133            int handlerExecCount = 0;
134            if (handlerNote || handlerRelease || handlerController || handlerRpn ||
135                handlerNrpn) // only one of these are executed after "init" handler
136                handlerExecCount++;
137    
138            // create script event pool (if it doesn't exist already)
139            if (!pEvents) {
140                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
141                for (int i = 0; i < 128; ++i)
142                    pKeyEvents[i] = new RTList<ScriptEvent>(pEvents);
143                // reset RTAVLNode's tree node member variables after nodes are allocated
144                // (since we can't use a constructor right now, we do that initialization here)
145                while (!pEvents->poolIsEmpty()) {
146                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
147                    it->reset();
148                }
149            }
150            pEvents->clear(); // outside of upper block, as loop below must always start from cleared list
151    
152            // create new VM execution contexts for new script
153            while (!pEvents->poolIsEmpty()) {
154                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
155                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
156                    parserContext
157                );
158                it->handlers = new VMEventHandler*[handlerExecCount+1];
159            }
160            pEvents->clear();
161    
162            dmsg(1,("Done\n"));
163        }
164    
165        /** @brief Unload real-time instrument script.
166         *
167         * Unloads the currently used real-time instrument script and frees all
168         * resources allocated for that script. The sampler engine's resource manager
169         * is used to share equivalent scripts among multiple sampler channels, and
170         * to deallocate the parsed script once not used on any engine channel
171         * anymore.
172         *
173         * Calling this method will however not clear the @c code member variable.
174         * Thus, the script can be parsed again afterwards.
175         */
176        void InstrumentScript::unload() {
177            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
178    
179            if (parserContext)
180                dmsg(1,("Unloading current instrument script.\n"));
181    
182            resetEvents();
183    
184            // free allocated VM execution contexts
185            if (pEvents) {
186                pEvents->clear();
187                while (!pEvents->poolIsEmpty()) {
188                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
189                    if (!it) break;
190                    if (it->execCtx) {
191                        // free VM execution context object
192                        delete it->execCtx;
193                        it->execCtx = NULL;
194                        // free C array of handler pointers
195                        delete [] it->handlers;
196                        it->handlers = NULL;
197                    }
198                }
199                pEvents->clear();
200            }
201            // hand back VM representation of script
202            if (parserContext) {
203                AbstractInstrumentManager* pManager =
204                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
205    
206                pManager->scripts.HandBack(parserContext, pEngineChannel);
207                parserContext = NULL;
208                handlerInit = NULL;
209                handlerNote = NULL;
210                handlerRelease = NULL;
211                handlerController = NULL;
212                handlerRpn = NULL;
213                handlerNrpn = NULL;
214            }
215            bHasValidScript = false;
216        }
217    
218        /**
219         * Same as unload(), but this one also empties the @c code member variable
220         * to an empty string.
221         */
222        void InstrumentScript::resetAll() {
223            unload();
224            code.clear();
225        }
226        
227        /**
228         * Clears all currently active script events. This should be called
229         * whenever the engine or engine channel was reset for some reason.
230         */
231        void InstrumentScript::resetEvents() {
232            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
233                eventGroups[i].clear();
234    
235            for (int i = 0; i < 128; ++i)
236                if (pKeyEvents[i])
237                    pKeyEvents[i]->clear();
238    
239            suspendedEvents.clear();
240    
241            if (pEvents) pEvents->clear();
242        }
243    
244        ///////////////////////////////////////////////////////////////////////
245        // class 'InstrumentScriptVM'
246    
247        InstrumentScriptVM::InstrumentScriptVM() :
248            m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
249            m_fnSetRpn(this), m_fnSetNrpn(this),
250            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
251            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
252            m_fnChangeVol(this), m_fnChangeVolTime(this),
253            m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this),
254            m_fnChangePanTime(this), m_fnChangePanCurve(this),
255            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
256            m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this),
257            m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this),
258            m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this),
259            m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this),
260            m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this),
261            m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this),
262            m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this),
263            m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this),
264            m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this),
265            m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this),
266            m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this),
267            m_fnCallbackStatus(this),
268            m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this),
269            m_varCallbackChildID(this)
270        {
271            m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
272            m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
273            m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
274            m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key);
275            m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity);
276            m_RPN_ADDRESS = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Parameter);
277            m_RPN_VALUE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Value);
278            m_KEY_DOWN.size = 128;
279            m_KEY_DOWN.readonly = true;
280            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
281            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
282            m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID);
283      }      }
284    
285      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 29  namespace LinuxSampler { Line 287  namespace LinuxSampler {
287              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
288    
289          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
290          m_cause = &event->cause;          m_event = event;
291          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
292            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
293    
294          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
295          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
296          // 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
297          // script might access the new CC value          // script might access the new CC value
298          if (!event->executionSlices) {          if (!event->executionSlices) {
299              switch (m_cause->Type) {              switch (event->cause.Type) {
300                  case Event::type_control_change:                  case Event::type_control_change:
301                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
302                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
303                      break;                      break;
304                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
305                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
306                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
307                      break;                      break;
308                  case Event::type_pitchbend:                  case Event::type_pitchbend:
309                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
310                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
311                      break;                      break;
312                    default:
313                        ; // noop
314              }              }
315          }          }
316    
317          // run the script handler(s)          // run the script handler(s)
318          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;
319          while (event->handlers[event->currentHandler]) {          for ( ; event->handlers[event->currentHandler]; event->currentHandler++) {
320              res = ScriptVM::exec(              res = ScriptVM::exec(
321                  parserCtx, event->execCtx, event->handlers[event->currentHandler++]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
322              );              );
323              event->executionSlices++;              event->executionSlices++;
324                if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ...
325                    // check if this script handler instance has any forked children
326                    // to be auto aborted
327                    for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER &&
328                         event->childHandlerID[iChild]; ++iChild)
329                    {
330                        RTList<ScriptEvent>::Iterator itChild =
331                            pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]);
332                        if (itChild && itChild->autoAbortByParent)
333                            itChild->execCtx->signalAbort();
334                    }
335                }
336              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
337          }          }
338    
339          return res;          return res;
340      }      }
341    
342      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() {
343          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
344          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables();
345    
346          // now add own built-in variables          // now add own built-in variables
347          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
348            m["$EVENT_ID"] = &m_EVENT_ID;
349          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
350          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
351  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
352            m["$RPN_ADDRESS"] = &m_RPN_ADDRESS; // used for both RPN and NRPN events
353            m["$RPN_VALUE"] = &m_RPN_VALUE;     // used for both RPN and NRPN events
354            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
355            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
356            m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID;
357    
358          return m;          return m;
359      }      }
360    
361      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
362          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
363          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
364    
365          // now add own built-in variables          // now add own built-in variables
366          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
367          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
368          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
369    
370          return m;          return m;
371      }      }
372    
373      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() {
374          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
375          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,vmint> m = ScriptVM::builtInConstIntVariables();
376    
377            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
378            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
379          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
380          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
381            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
382                m["$MARK_" + ToString(i+1)] = i;
383            }
384            m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE;
385            m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY;
386            m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME;
387            m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE;
388            m["$EVENT_PAR_0"] = EVENT_PAR_0;
389            m["$EVENT_PAR_1"] = EVENT_PAR_1;
390            m["$EVENT_PAR_2"] = EVENT_PAR_2;
391            m["$EVENT_PAR_3"] = EVENT_PAR_3;
392            m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR;
393            m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT;
394            m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED;
395            m["$CALLBACK_STATUS_QUEUE"]      = CALLBACK_STATUS_QUEUE;
396            m["$CALLBACK_STATUS_RUNNING"]    = CALLBACK_STATUS_RUNNING;
397    
398          return m;          return m;
399      }      }
400    
401        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
402            // first get built-in dynamic variables of derived VM class
403            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
404    
405            m["%ALL_EVENTS"] = &m_varAllEvents;
406            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
407            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
408            m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID;
409    
410            return m;
411        }
412    
413        VMFunction* InstrumentScriptVM::functionByName(const String& name) {
414            // built-in script functions of this class
415            if      (name == "play_note") return &m_fnPlayNote;
416            else if (name == "set_controller") return &m_fnSetController;
417            else if (name == "set_rpn") return &m_fnSetRpn;
418            else if (name == "set_nrpn") return &m_fnSetNrpn;
419            else if (name == "ignore_event") return &m_fnIgnoreEvent;
420            else if (name == "ignore_controller") return &m_fnIgnoreController;
421            else if (name == "note_off") return &m_fnNoteOff;
422            else if (name == "set_event_mark") return &m_fnSetEventMark;
423            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
424            else if (name == "by_marks") return &m_fnByMarks;
425            else if (name == "change_vol") return &m_fnChangeVol;
426            else if (name == "change_vol_time") return &m_fnChangeVolTime;
427            else if (name == "change_tune") return &m_fnChangeTune;
428            else if (name == "change_tune_time") return &m_fnChangeTuneTime;
429            else if (name == "change_note") return &m_fnChangeNote;
430            else if (name == "change_velo") return &m_fnChangeVelo;
431            else if (name == "change_pan") return &m_fnChangePan;
432            else if (name == "change_pan_time") return &m_fnChangePanTime;
433            else if (name == "change_pan_curve") return &m_fnChangePanCurve;
434            else if (name == "change_cutoff") return &m_fnChangeCutoff;
435            else if (name == "change_reso") return &m_fnChangeReso;
436            else if (name == "change_attack") return &m_fnChangeAttack;
437            else if (name == "change_decay") return &m_fnChangeDecay;
438            else if (name == "change_sustain") return &m_fnChangeSustain;
439            else if (name == "change_release") return &m_fnChangeRelease;
440            else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack;
441            else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay;
442            else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain;
443            else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease;
444            else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth;
445            else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq;
446            else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth;
447            else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq;
448            else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth;
449            else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq;
450            else if (name == "fade_in") return &m_fnFadeIn;
451            else if (name == "fade_out") return &m_fnFadeOut;
452            else if (name == "change_vol_curve") return &m_fnChangeVolCurve;
453            else if (name == "change_tune_curve") return &m_fnChangeTuneCurve;
454            else if (name == "change_play_pos") return &m_fnChangePlayPos;
455            else if (name == "get_event_par") return &m_fnGetEventPar;
456            else if (name == "set_event_par") return &m_fnSetEventPar;
457            else if (name == "event_status") return &m_fnEventStatus;
458            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
459            else if (name == "stop_wait") return &m_fnStopWait;
460            else if (name == "abort") return &m_fnAbort;
461            else if (name == "fork") return &m_fnFork;
462            else if (name == "callback_status") return &m_fnCallbackStatus;
463    
464            // built-in script functions of derived VM class
465            return ScriptVM::functionByName(name);
466        }
467    
468  } // namespace LinuxSampler  } // namespace LinuxSampler
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