/[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 3802 by schoenebeck, Fri Jul 31 15:07:04 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            }
148            pEvents->clear(); // outside of upper block, as loop below must always start from cleared list
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) break;
188                    if (it->execCtx) {
189                        // free VM execution context object
190                        delete it->execCtx;
191                        it->execCtx = NULL;
192                        // free C array of handler pointers
193                        delete [] it->handlers;
194                        it->handlers = NULL;
195                    }
196                }
197                pEvents->clear();
198            }
199            // hand back VM representation of script
200            if (parserContext) {
201                AbstractInstrumentManager* pManager =
202                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
203    
204                pManager->scripts.HandBack(parserContext, pEngineChannel);
205                parserContext = NULL;
206                handlerInit = NULL;
207                handlerNote = NULL;
208                handlerRelease = NULL;
209                handlerController = NULL;
210                handlerRpn = NULL;
211                handlerNrpn = NULL;
212            }
213            bHasValidScript = false;
214        }
215    
216        /**
217         * Same as unload(), but this one also empties the @c code member variable
218         * to an empty string.
219         */
220        void InstrumentScript::resetAll() {
221            unload();
222            code.clear();
223        }
224        
225        /**
226         * Clears all currently active script events. This should be called
227         * whenever the engine or engine channel was reset for some reason.
228         */
229        void InstrumentScript::resetEvents() {
230            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
231                eventGroups[i].clear();
232    
233            for (int i = 0; i < 128; ++i)
234                if (pKeyEvents[i])
235                    pKeyEvents[i]->clear();
236    
237            suspendedEvents.clear();
238    
239            if (pEvents) pEvents->clear();
240        }
241    
242        ///////////////////////////////////////////////////////////////////////
243        // class 'InstrumentScriptVM'
244    
245        InstrumentScriptVM::InstrumentScriptVM() :
246            m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
247            m_fnSetRpn(this), m_fnSetNrpn(this),
248            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
249            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
250            m_fnChangeVol(this), m_fnChangeVolTime(this),
251            m_fnChangeTune(this), m_fnChangeTuneTime(this), m_fnChangePan(this),
252            m_fnChangePanTime(this), m_fnChangePanCurve(this),
253            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
254            m_fnChangeDecay(this), m_fnChangeSustain(this), m_fnChangeRelease(this),
255            m_fnChangeCutoffAttack(this), m_fnChangeCutoffDecay(this),
256            m_fnChangeCutoffSustain(this), m_fnChangeCutoffRelease(this),
257            m_fnChangeAmpLFODepth(this), m_fnChangeAmpLFOFreq(this),
258            m_fnChangeCutoffLFODepth(this), m_fnChangeCutoffLFOFreq(this),
259            m_fnChangePitchLFODepth(this), m_fnChangePitchLFOFreq(this),
260            m_fnChangeNote(this), m_fnChangeVelo(this), m_fnFork(this),
261            m_fnEventStatus(this), m_fnWait2(this), m_fnStopWait(this),
262            m_fnAbort(this), m_fnFadeIn(this), m_fnFadeOut(this),
263            m_fnChangeVolCurve(this), m_fnChangeTuneCurve(this),
264            m_fnGetEventPar(this), m_fnSetEventPar(this), m_fnChangePlayPos(this),
265            m_fnCallbackStatus(this),
266            m_varEngineUptime(this), m_varCallbackID(this), m_varAllEvents(this),
267            m_varCallbackChildID(this)
268        {
269            m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
270            m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
271            m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
272            m_EVENT_NOTE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Key);
273            m_EVENT_VELOCITY = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.Note.Velocity);
274            m_RPN_ADDRESS = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Parameter);
275            m_RPN_VALUE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, cause.Param.RPN.Value);
276            m_KEY_DOWN.size = 128;
277            m_KEY_DOWN.readonly = true;
278            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
279            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
280            m_NKSP_CALLBACK_PARENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, parentHandlerID);
281      }      }
282    
283      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 29  namespace LinuxSampler { Line 285  namespace LinuxSampler {
285              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
286    
287          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
288          m_cause = &event->cause;          m_event = event;
289          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
290            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
291    
292          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
293          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
294          // 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
295          // script might access the new CC value          // script might access the new CC value
296          if (!event->executionSlices) {          if (!event->executionSlices) {
297              switch (m_cause->Type) {              switch (event->cause.Type) {
298                  case Event::type_control_change:                  case Event::type_control_change:
299                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
300                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
301                      break;                      break;
302                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
303                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
304                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
305                      break;                      break;
306                  case Event::type_pitchbend:                  case Event::type_pitchbend:
307                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
308                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
309                      break;                      break;
310                    default:
311                        ; // noop
312              }              }
313          }          }
314    
315          // run the script handler(s)          // run the script handler(s)
316          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;
317          while (event->handlers[event->currentHandler]) {          for ( ; event->handlers[event->currentHandler]; event->currentHandler++) {
318              res = ScriptVM::exec(              res = ScriptVM::exec(
319                  parserCtx, event->execCtx, event->handlers[event->currentHandler++]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
320              );              );
321              event->executionSlices++;              event->executionSlices++;
322                if (!(res & VM_EXEC_SUSPENDED)) { // if script terminated ...
323                    // check if this script handler instance has any forked children
324                    // to be auto aborted
325                    for (int iChild = 0; iChild < MAX_FORK_PER_SCRIPT_HANDLER &&
326                         event->childHandlerID[iChild]; ++iChild)
327                    {
328                        RTList<ScriptEvent>::Iterator itChild =
329                            pEngineChannel->ScriptCallbackByID(event->childHandlerID[iChild]);
330                        if (itChild && itChild->autoAbortByParent)
331                            itChild->execCtx->signalAbort();
332                    }
333                }
334              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
335          }          }
336    
337          return res;          return res;
338      }      }
339    
340      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntPtr*> InstrumentScriptVM::builtInIntVariables() {
341          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
342          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntPtr*> m = ScriptVM::builtInIntVariables();
343    
344          // now add own built-in variables          // now add own built-in variables
345          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
346            m["$EVENT_ID"] = &m_EVENT_ID;
347          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
348          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
349  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
350            m["$RPN_ADDRESS"] = &m_RPN_ADDRESS; // used for both RPN and NRPN events
351            m["$RPN_VALUE"] = &m_RPN_VALUE;     // used for both RPN and NRPN events
352            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
353            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
354            m["$NKSP_CALLBACK_PARENT_ID"] = &m_NKSP_CALLBACK_PARENT_ID;
355    
356          return m;          return m;
357      }      }
358    
359      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
360          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
361          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
362    
363          // now add own built-in variables          // now add own built-in variables
364          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
365          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
366          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
367    
368          return m;          return m;
369      }      }
370    
371      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,vmint> InstrumentScriptVM::builtInConstIntVariables() {
372          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
373          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,vmint> m = ScriptVM::builtInConstIntVariables();
374    
375            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
376            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
377          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
378          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
379            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
380                m["$MARK_" + ToString(i+1)] = i;
381            }
382            m["$EVENT_PAR_NOTE"] = EVENT_PAR_NOTE;
383            m["$EVENT_PAR_VELOCITY"] = EVENT_PAR_VELOCITY;
384            m["$EVENT_PAR_VOLUME"] = EVENT_PAR_VOLUME;
385            m["$EVENT_PAR_TUNE"] = EVENT_PAR_TUNE;
386            m["$EVENT_PAR_0"] = EVENT_PAR_0;
387            m["$EVENT_PAR_1"] = EVENT_PAR_1;
388            m["$EVENT_PAR_2"] = EVENT_PAR_2;
389            m["$EVENT_PAR_3"] = EVENT_PAR_3;
390            m["$NKSP_LINEAR"] = FADE_CURVE_LINEAR;
391            m["$NKSP_EASE_IN_EASE_OUT"] = FADE_CURVE_EASE_IN_EASE_OUT;
392            m["$CALLBACK_STATUS_TERMINATED"] = CALLBACK_STATUS_TERMINATED;
393            m["$CALLBACK_STATUS_QUEUE"]      = CALLBACK_STATUS_QUEUE;
394            m["$CALLBACK_STATUS_RUNNING"]    = CALLBACK_STATUS_RUNNING;
395    
396          return m;          return m;
397      }      }
398    
399        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
400            // first get built-in dynamic variables of derived VM class
401            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
402    
403            m["%ALL_EVENTS"] = &m_varAllEvents;
404            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
405            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
406            m["%NKSP_CALLBACK_CHILD_ID"] = &m_varCallbackChildID;
407    
408            return m;
409        }
410    
411        VMFunction* InstrumentScriptVM::functionByName(const String& name) {
412            // built-in script functions of this class
413            if      (name == "play_note") return &m_fnPlayNote;
414            else if (name == "set_controller") return &m_fnSetController;
415            else if (name == "set_rpn") return &m_fnSetRpn;
416            else if (name == "set_nrpn") return &m_fnSetNrpn;
417            else if (name == "ignore_event") return &m_fnIgnoreEvent;
418            else if (name == "ignore_controller") return &m_fnIgnoreController;
419            else if (name == "note_off") return &m_fnNoteOff;
420            else if (name == "set_event_mark") return &m_fnSetEventMark;
421            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
422            else if (name == "by_marks") return &m_fnByMarks;
423            else if (name == "change_vol") return &m_fnChangeVol;
424            else if (name == "change_vol_time") return &m_fnChangeVolTime;
425            else if (name == "change_tune") return &m_fnChangeTune;
426            else if (name == "change_tune_time") return &m_fnChangeTuneTime;
427            else if (name == "change_note") return &m_fnChangeNote;
428            else if (name == "change_velo") return &m_fnChangeVelo;
429            else if (name == "change_pan") return &m_fnChangePan;
430            else if (name == "change_pan_time") return &m_fnChangePanTime;
431            else if (name == "change_pan_curve") return &m_fnChangePanCurve;
432            else if (name == "change_cutoff") return &m_fnChangeCutoff;
433            else if (name == "change_reso") return &m_fnChangeReso;
434            else if (name == "change_attack") return &m_fnChangeAttack;
435            else if (name == "change_decay") return &m_fnChangeDecay;
436            else if (name == "change_sustain") return &m_fnChangeSustain;
437            else if (name == "change_release") return &m_fnChangeRelease;
438            else if (name == "change_cutoff_attack") return &m_fnChangeCutoffAttack;
439            else if (name == "change_cutoff_decay") return &m_fnChangeCutoffDecay;
440            else if (name == "change_cutoff_sustain") return &m_fnChangeCutoffSustain;
441            else if (name == "change_cutoff_release") return &m_fnChangeCutoffRelease;
442            else if (name == "change_amp_lfo_depth") return &m_fnChangeAmpLFODepth;
443            else if (name == "change_amp_lfo_freq") return &m_fnChangeAmpLFOFreq;
444            else if (name == "change_cutoff_lfo_depth") return &m_fnChangeCutoffLFODepth;
445            else if (name == "change_cutoff_lfo_freq") return &m_fnChangeCutoffLFOFreq;
446            else if (name == "change_pitch_lfo_depth") return &m_fnChangePitchLFODepth;
447            else if (name == "change_pitch_lfo_freq") return &m_fnChangePitchLFOFreq;
448            else if (name == "fade_in") return &m_fnFadeIn;
449            else if (name == "fade_out") return &m_fnFadeOut;
450            else if (name == "change_vol_curve") return &m_fnChangeVolCurve;
451            else if (name == "change_tune_curve") return &m_fnChangeTuneCurve;
452            else if (name == "change_play_pos") return &m_fnChangePlayPos;
453            else if (name == "get_event_par") return &m_fnGetEventPar;
454            else if (name == "set_event_par") return &m_fnSetEventPar;
455            else if (name == "event_status") return &m_fnEventStatus;
456            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
457            else if (name == "stop_wait") return &m_fnStopWait;
458            else if (name == "abort") return &m_fnAbort;
459            else if (name == "fork") return &m_fnFork;
460            else if (name == "callback_status") return &m_fnCallbackStatus;
461    
462            // built-in script functions of derived VM class
463            return ScriptVM::functionByName(name);
464        }
465    
466  } // namespace LinuxSampler  } // namespace LinuxSampler
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