/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVM.cpp
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revision 2595 by schoenebeck, Thu Jun 5 12:14:53 2014 UTC revision 3035 by schoenebeck, Mon Oct 31 12:00:00 2016 UTC
# Line 1  Line 1 
1  /*  /*
2   * Copyright (c) 2014 Christian Schoenebeck   * Copyright (c) 2014 - 2016 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    
17  namespace LinuxSampler {  namespace LinuxSampler {
18    
19      // circumvents a bug in GCC 4.x which causes a sizeof() expression applied      ///////////////////////////////////////////////////////////////////////
20      // on a class member to throw a compiler error, i.e. with GCC 4.4:      // class 'EventGroup'
     // "object missing in reference to 'LinuxSampler::AbstractEngineChannel::ControllerTable'")  
     // or with GCC 4.0:  
     // "invalid use of non-static data member 'LinuxSampler::AbstractEngineChannel::ControllerTable'"  
     #define _MEMBER_SIZEOF(T_Class, Member) sizeof(((T_Class*)NULL)->Member)  
21    
22      InstrumentScriptVM::InstrumentScriptVM() : m_event(NULL) {      void EventGroup::insert(int eventID) {
23            if (contains(eventID)) return;
24    
25            AbstractEngine* pEngine = m_script->pEngineChannel->pEngine;
26    
27            // before adding the new event ID, check if there are any dead events
28            // and remove them in that case, before otherwise we might run in danger
29            // to run out of free space on this group for event IDs if a lot of
30            // events die before being removed explicitly from the group by script
31            //
32            // NOTE: or should we do this "dead ones" check only once in a while?
33            int firstDead = -1;
34            for (int i = 0; i < size(); ++i) {
35                if (firstDead >= 0) {
36                    if (pEngine->EventByID(eventID)) {
37                        remove(firstDead, i - firstDead);
38                        firstDead = -1;
39                    }
40                } else {
41                    if (!pEngine->EventByID(eventID)) firstDead = i;
42                }
43            }
44    
45            append(eventID);
46        }
47    
48        void EventGroup::erase(int eventID) {
49            int index = find(eventID);
50            remove(index);
51        }
52    
53        ///////////////////////////////////////////////////////////////////////
54        // class 'InstrumentScript'
55    
56        InstrumentScript::InstrumentScript(AbstractEngineChannel* pEngineChannel) {
57            parserContext = NULL;
58            bHasValidScript = false;
59            handlerInit = NULL;
60            handlerNote = NULL;
61            handlerRelease = NULL;
62            handlerController = NULL;
63            pEvents = NULL;
64            for (int i = 0; i < 128; ++i)
65                pKeyEvents[i] = NULL;
66            this->pEngineChannel = pEngineChannel;
67            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
68                eventGroups[i].setScript(this);
69        }
70    
71        InstrumentScript::~InstrumentScript() {
72            resetAll();
73            if (pEvents) {
74                for (int i = 0; i < 128; ++i) delete pKeyEvents[i];
75                delete pEvents;
76            }
77        }
78    
79        /** @brief Load real-time instrument script.
80         *
81         * Loads the real-time instrument script given by @a text on the engine
82         * channel this InstrumentScript object belongs to (defined by
83         * pEngineChannel member variable). The sampler engine's resource manager is
84         * used to allocate and share equivalent scripts on multiple engine
85         * channels.
86         *
87         * @param text - source code of script
88         */
89        void InstrumentScript::load(const String& text) {
90            dmsg(1,("Loading real-time instrument script ... "));
91    
92            // hand back old script reference and VM execution contexts
93            // (if not done already)
94            unload();
95    
96            code = text;
97    
98            AbstractInstrumentManager* pManager =
99                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
100    
101            // get new script reference
102            parserContext = pManager->scripts.Borrow(text, pEngineChannel);
103            if (!parserContext->errors().empty()) {
104                std::vector<ParserIssue> errors = parserContext->errors();
105                std::cerr << "[ScriptVM] Could not load instrument script, there were "
106                        << errors.size() << " parser errors:\n";
107                for (int i = 0; i < errors.size(); ++i)
108                    errors[i].dump();
109                return; // stop here if there were any parser errors
110            }
111    
112            handlerInit = parserContext->eventHandlerByName("init");
113            handlerNote = parserContext->eventHandlerByName("note");
114            handlerRelease = parserContext->eventHandlerByName("release");
115            handlerController = parserContext->eventHandlerByName("controller");
116            bHasValidScript =
117                handlerInit || handlerNote || handlerRelease || handlerController;
118    
119            // amount of script handlers each script event has to execute
120            int handlerExecCount = 0;
121            if (handlerNote || handlerRelease || handlerController) // only one of these are executed after "init" handler
122                handlerExecCount++;
123    
124            // create script event pool (if it doesn't exist already)
125            if (!pEvents) {
126                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
127                for (int i = 0; i < 128; ++i)
128                    pKeyEvents[i] = new RTList<ScriptEvent>(pEvents);
129                // reset RTAVLNode's tree node member variables after nodes are allocated
130                // (since we can't use a constructor right now, we do that initialization here)
131                while (!pEvents->poolIsEmpty()) {
132                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
133                    it->reset();
134                }
135                pEvents->clear();
136            }
137    
138            // create new VM execution contexts for new script
139            while (!pEvents->poolIsEmpty()) {
140                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
141                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
142                    parserContext
143                );
144                it->handlers = new VMEventHandler*[handlerExecCount+1];
145            }
146            pEvents->clear();
147    
148            dmsg(1,("Done\n"));
149        }
150    
151        /** @brief Unload real-time instrument script.
152         *
153         * Unloads the currently used real-time instrument script and frees all
154         * resources allocated for that script. The sampler engine's resource manager
155         * is used to share equivalent scripts among multiple sampler channels, and
156         * to deallocate the parsed script once not used on any engine channel
157         * anymore.
158         *
159         * Calling this method will however not clear the @c code member variable.
160         * Thus, the script can be parsed again afterwards.
161         */
162        void InstrumentScript::unload() {
163            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
164    
165            if (parserContext)
166                dmsg(1,("Unloading current instrument script.\n"));
167    
168            resetEvents();
169    
170            // free allocated VM execution contexts
171            if (pEvents) {
172                pEvents->clear();
173                while (!pEvents->poolIsEmpty()) {
174                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
175                    if (it->execCtx) {
176                        // free VM execution context object
177                        delete it->execCtx;
178                        it->execCtx = NULL;
179                        // free C array of handler pointers
180                        delete [] it->handlers;
181                    }
182                }
183                pEvents->clear();
184            }
185            // hand back VM representation of script
186            if (parserContext) {
187                AbstractInstrumentManager* pManager =
188                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
189    
190                pManager->scripts.HandBack(parserContext, pEngineChannel);
191                parserContext = NULL;
192                handlerInit = NULL;
193                handlerNote = NULL;
194                handlerRelease = NULL;
195                handlerController = NULL;
196            }
197            bHasValidScript = false;
198        }
199    
200        /**
201         * Same as unload(), but this one also empties the @c code member variable
202         * to an empty string.
203         */
204        void InstrumentScript::resetAll() {
205            unload();
206            code.clear();
207        }
208        
209        /**
210         * Clears all currently active script events. This should be called
211         * whenever the engine or engine channel was reset for some reason.
212         */
213        void InstrumentScript::resetEvents() {
214            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
215                eventGroups[i].clear();
216    
217            for (int i = 0; i < 128; ++i)
218                if (pKeyEvents[i])
219                    pKeyEvents[i]->clear();
220    
221            suspendedEvents.clear();
222    
223            if (pEvents) pEvents->clear();
224        }
225    
226        ///////////////////////////////////////////////////////////////////////
227        // class 'InstrumentScriptVM'
228    
229        InstrumentScriptVM::InstrumentScriptVM() :
230            m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
231            m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
232            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this),
233            m_fnChangeVol(this), m_fnChangeTune(this), m_fnChangePan(this),
234            m_fnChangeCutoff(this), m_fnChangeReso(this),  m_fnChangeAttack(this),
235            m_fnChangeDecay(this), m_fnChangeRelease(this), m_fnEventStatus(this),
236            m_fnWait2(this), m_fnStopWait(this),
237            m_varEngineUptime(this), m_varCallbackID(this)
238        {
239          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
240          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);
241          m_EVENT_NOTE = DECLARE_VMINT(m_cause, class Event, Param.Note.Key);          m_EVENT_ID = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, id);
242          m_EVENT_VELOCITY = DECLARE_VMINT(m_cause, class Event, Param.Note.Velocity);          m_EVENT_NOTE = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Key);
243            m_EVENT_VELOCITY = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Velocity);
244            m_KEY_DOWN.size = 128;
245            m_NI_CALLBACK_TYPE = DECLARE_VMINT_READONLY(m_event, class ScriptEvent, handlerType);
246            m_NKSP_IGNORE_WAIT = DECLARE_VMINT(m_event, class ScriptEvent, ignoreAllWaitCalls);
247      }      }
248    
249      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 31  namespace LinuxSampler { Line 251  namespace LinuxSampler {
251              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);              static_cast<AbstractEngineChannel*>(event->cause.pEngineChannel);
252    
253          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
254          m_cause = &event->cause;          m_event = event;
255          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
256            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
257    
258          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
259          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
260          // 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
261          // script might access the new CC value          // script might access the new CC value
262          if (!event->executionSlices) {          if (!event->executionSlices) {
263              switch (m_cause->Type) {              switch (event->cause.Type) {
264                  case Event::type_control_change:                  case Event::type_control_change:
265                      pEngineChannel->ControllerTable[m_cause->Param.CC.Controller] =                      pEngineChannel->ControllerTable[event->cause.Param.CC.Controller] =
266                          m_cause->Param.CC.Value;                          event->cause.Param.CC.Value;
267                      break;                      break;
268                  case Event::type_channel_pressure:                  case Event::type_channel_pressure:
269                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_AFTERTOUCH] =
270                          m_cause->Param.ChannelPressure.Value;                          event->cause.Param.ChannelPressure.Value;
271                      break;                      break;
272                  case Event::type_pitchbend:                  case Event::type_pitchbend:
273                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =                      pEngineChannel->ControllerTable[CTRL_TABLE_IDX_PITCHBEND] =
274                          m_cause->Param.Pitch.Pitch;                          event->cause.Param.Pitch.Pitch;
275                      break;                      break;
276              }              }
277          }          }
278    
279          // run the script handler(s)          // run the script handler(s)
280          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;          VMExecStatus_t res = VM_EXEC_NOT_RUNNING;
281          while (event->handlers[event->currentHandler]) {          for ( ; event->handlers[event->currentHandler]; event->currentHandler++) {
282              res = ScriptVM::exec(              res = ScriptVM::exec(
283                  parserCtx, event->execCtx, event->handlers[event->currentHandler++]                  parserCtx, event->execCtx, event->handlers[event->currentHandler]
284              );              );
285              event->executionSlices++;              event->executionSlices++;
286              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;              if (res & VM_EXEC_SUSPENDED || res & VM_EXEC_ERROR) return res;
# Line 69  namespace LinuxSampler { Line 290  namespace LinuxSampler {
290      }      }
291    
292      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {      std::map<String,VMIntRelPtr*> InstrumentScriptVM::builtInIntVariables() {
293          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
294          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();          std::map<String,VMIntRelPtr*> m = ScriptVM::builtInIntVariables();
295    
296          // now add own built-in variables          // now add own built-in variables
297          m["$CC_NUM"] = &m_CC_NUM;          m["$CC_NUM"] = &m_CC_NUM;
298            m["$EVENT_ID"] = &m_EVENT_ID;
299          m["$EVENT_NOTE"] = &m_EVENT_NOTE;          m["$EVENT_NOTE"] = &m_EVENT_NOTE;
300          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;          m["$EVENT_VELOCITY"] = &m_EVENT_VELOCITY;
301  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;  //         m["$POLY_AT_NUM"] = &m_POLY_AT_NUM;
302            m["$NI_CALLBACK_TYPE"] = &m_NI_CALLBACK_TYPE;
303            m["$NKSP_IGNORE_WAIT"] = &m_NKSP_IGNORE_WAIT;
304    
305          return m;          return m;
306      }      }
307    
308      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {      std::map<String,VMInt8Array*> InstrumentScriptVM::builtInIntArrayVariables() {
309          // first get buil-in integer array variables of derived VM class          // first get built-in integer array variables of derived VM class
310          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();          std::map<String,VMInt8Array*> m = ScriptVM::builtInIntArrayVariables();
311    
312          // now add own built-in variables          // now add own built-in variables
313          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
314          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
315          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
316    
317          return m;          return m;
318      }      }
319    
320      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {      std::map<String,int> InstrumentScriptVM::builtInConstIntVariables() {
321          // first get buil-in integer variables of derived VM class          // first get built-in integer variables of derived VM class
322          std::map<String,int> m = ScriptVM::builtInConstIntVariables();          std::map<String,int> m = ScriptVM::builtInConstIntVariables();
323    
324            m["$EVENT_STATUS_INACTIVE"] = EVENT_STATUS_INACTIVE;
325            m["$EVENT_STATUS_NOTE_QUEUE"] = EVENT_STATUS_NOTE_QUEUE;
326          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
327          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
328            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
329                m["$MARK_" + ToString(i+1)] = i;
330            }
331    
332          return m;          return m;
333      }      }
334    
335        std::map<String,VMDynVar*> InstrumentScriptVM::builtInDynamicVariables() {
336            // first get built-in dynamic variables of derived VM class
337            std::map<String,VMDynVar*> m = ScriptVM::builtInDynamicVariables();
338    
339            m["$ENGINE_UPTIME"] = &m_varEngineUptime;
340            m["$NI_CALLBACK_ID"] = &m_varCallbackID;
341    
342            return m;
343        }
344    
345        VMFunction* InstrumentScriptVM::functionByName(const String& name) {
346            // built-in script functions of this class
347            if      (name == "play_note") return &m_fnPlayNote;
348            else if (name == "set_controller") return &m_fnSetController;
349            else if (name == "ignore_event") return &m_fnIgnoreEvent;
350            else if (name == "ignore_controller") return &m_fnIgnoreController;
351            else if (name == "note_off") return &m_fnNoteOff;
352            else if (name == "set_event_mark") return &m_fnSetEventMark;
353            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
354            else if (name == "by_marks") return &m_fnByMarks;
355            else if (name == "change_vol") return &m_fnChangeVol;
356            else if (name == "change_tune") return &m_fnChangeTune;
357            else if (name == "change_pan") return &m_fnChangePan;
358            else if (name == "change_cutoff") return &m_fnChangeCutoff;
359            else if (name == "change_reso") return &m_fnChangeReso;
360            else if (name == "change_attack") return &m_fnChangeAttack;
361            else if (name == "change_decay") return &m_fnChangeDecay;
362            else if (name == "change_release") return &m_fnChangeRelease;
363            else if (name == "event_status") return &m_fnEventStatus;
364            else if (name == "wait") return &m_fnWait2; // override wait() core implementation
365            else if (name == "stop_wait") return &m_fnStopWait;
366    
367            // built-in script functions of derived VM class
368            return ScriptVM::functionByName(name);
369        }
370    
371  } // namespace LinuxSampler  } // namespace LinuxSampler
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