/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVM.cpp
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revision 2600 by schoenebeck, Sat Jun 7 00:16:03 2014 UTC revision 2630 by schoenebeck, Fri Jun 13 15:01:06 2014 UTC
# Line 10  Line 10 
10  #include "InstrumentScriptVM.h"  #include "InstrumentScriptVM.h"
11  #include "../AbstractEngineChannel.h"  #include "../AbstractEngineChannel.h"
12  #include "../../common/global_private.h"  #include "../../common/global_private.h"
13    #include "AbstractInstrumentManager.h"
14    #include "MidiKeyboardManager.h"
15    
16  namespace LinuxSampler {  namespace LinuxSampler {
17    
18        ///////////////////////////////////////////////////////////////////////
19        // class 'EventGroup'
20    
21        void EventGroup::insert(int eventID) {
22            if (contains(eventID)) return;
23    
24            AbstractEngine* pEngine = m_script->pEngineChannel->pEngine;
25    
26            // before adding the new event ID, check if there are any dead events
27            // and remove them in that case, before otherwise we might run in danger
28            // to run out of free space on this group for event IDs if a lot of
29            // events die before being removed explicitly from the group by script
30            //
31            // NOTE: or should we do this "dead ones" check only once in a while?
32            int firstDead = -1;
33            for (int i = 0; i < size(); ++i) {
34                if (firstDead >= 0) {
35                    if (pEngine->EventByID(eventID)) {
36                        remove(firstDead, i - firstDead);
37                        firstDead = -1;
38                    }
39                } else {
40                    if (!pEngine->EventByID(eventID)) firstDead = i;
41                }
42            }
43    
44            append(eventID);
45        }
46    
47        void EventGroup::erase(int eventID) {
48            int index = find(eventID);
49            remove(index);
50        }
51    
52        ///////////////////////////////////////////////////////////////////////
53        // class 'InstrumentScript'
54    
55        InstrumentScript::InstrumentScript(AbstractEngineChannel* pEngineChannel) {
56            parserContext = NULL;
57            bHasValidScript = false;
58            handlerInit = NULL;
59            handlerNote = NULL;
60            handlerRelease = NULL;
61            handlerController = NULL;
62            pEvents = NULL;
63            this->pEngineChannel = pEngineChannel;
64            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i)
65                eventGroups[i].setScript(this);
66        }
67    
68        /** @brief Load real-time instrument script.
69         *
70         * Loads the real-time instrument script given by @a text on the engine
71         * channel this InstrumentScript object belongs to (defined by
72         * pEngineChannel member variable). The sampler engine's resource manager is
73         * used to allocate and share equivalent scripts on multiple engine
74         * channels.
75         *
76         * @param text - source code of script
77         */
78        void InstrumentScript::load(const String& text) {
79            dmsg(1,("Loading real-time instrument script ... "));
80    
81            // hand back old script reference and VM execution contexts
82            // (if not done already)
83            unload();
84    
85            code = text;
86    
87            AbstractInstrumentManager* pManager =
88                dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
89    
90            // get new script reference
91            parserContext = pManager->scripts.Borrow(text, pEngineChannel);
92            if (!parserContext->errors().empty()) {
93                std::vector<ParserIssue> errors = parserContext->errors();
94                std::cerr << "[ScriptVM] Could not load instrument script, there were "
95                        << errors.size() << " parser errors:\n";
96                for (int i = 0; i < errors.size(); ++i)
97                    errors[i].dump();
98                return; // stop here if there were any parser errors
99            }
100    
101            handlerInit = parserContext->eventHandlerByName("init");
102            handlerNote = parserContext->eventHandlerByName("note");
103            handlerRelease = parserContext->eventHandlerByName("release");
104            handlerController = parserContext->eventHandlerByName("controller");
105            bHasValidScript =
106                handlerInit || handlerNote || handlerRelease || handlerController;
107    
108            // amount of script handlers each script event has to execute
109            int handlerExecCount = 0;
110            if (handlerNote || handlerRelease || handlerController) // only one of these are executed after "init" handler
111                handlerExecCount++;
112    
113            // create script event pool (if it doesn't exist already)
114            if (!pEvents)
115                pEvents = new Pool<ScriptEvent>(CONFIG_MAX_EVENTS_PER_FRAGMENT);
116    
117            // create new VM execution contexts for new script
118            while (!pEvents->poolIsEmpty()) {
119                RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
120                it->execCtx = pEngineChannel->pEngine->pScriptVM->createExecContext(
121                    parserContext
122                );
123                it->handlers = new VMEventHandler*[handlerExecCount+1];
124            }
125            pEvents->clear();
126    
127            dmsg(1,("Done\n"));
128        }
129    
130        /** @brief Unload real-time instrument script.
131         *
132         * Unloads the currently used real-time instrument script and frees all
133         * resources allocated for that script. The sampler engine's resource manager
134         * is used to share equivalent scripts among multiple sampler channels, and
135         * to deallocate the parsed script once not used on any engine channel
136         * anymore.
137         *
138         * Calling this method will however not clear the @c code member variable.
139         * Thus, the script can be parsed again afterwards.
140         */
141        void InstrumentScript::unload() {
142            //dmsg(1,("InstrumentScript::unload(this=0x%llx)\n", this));
143    
144            if (parserContext)
145                dmsg(1,("Unloading current instrument script.\n"));
146    
147            // free allocated VM execution contexts
148            if (pEvents) {
149                pEvents->clear();
150                while (!pEvents->poolIsEmpty()) {
151                    RTList<ScriptEvent>::Iterator it = pEvents->allocAppend();
152                    if (it->execCtx) {
153                        // free VM execution context object
154                        delete it->execCtx;
155                        it->execCtx = NULL;
156                        // free C array of handler pointers
157                        delete [] it->handlers;
158                    }
159                }
160                pEvents->clear();
161            }
162            // hand back VM representation of script
163            if (parserContext) {
164                AbstractInstrumentManager* pManager =
165                    dynamic_cast<AbstractInstrumentManager*>(pEngineChannel->pEngine->GetInstrumentManager());
166    
167                pManager->scripts.HandBack(parserContext, pEngineChannel);
168                parserContext = NULL;
169                handlerInit = NULL;
170                handlerNote = NULL;
171                handlerRelease = NULL;
172                handlerController = NULL;
173            }
174            bHasValidScript = false;
175        }
176    
177        /**
178         * Same as unload(), but this one also empties the @c code member variable
179         * to an empty string.
180         */
181        void InstrumentScript::resetAll() {
182            unload();
183            code.clear();
184        }
185    
186        ///////////////////////////////////////////////////////////////////////
187        // class 'InstrumentScriptVM'
188    
189      InstrumentScriptVM::InstrumentScriptVM() :      InstrumentScriptVM::InstrumentScriptVM() :
190          m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),          m_event(NULL), m_fnPlayNote(this), m_fnSetController(this),
191          m_fnIgnoreEvent(this), m_fnIgnoreController(this)          m_fnIgnoreEvent(this), m_fnIgnoreController(this), m_fnNoteOff(this),
192            m_fnSetEventMark(this), m_fnDeleteEventMark(this), m_fnByMarks(this)
193      {      {
194          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);          m_CC.size = _MEMBER_SIZEOF(AbstractEngineChannel, ControllerTable);
195          m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);          m_CC_NUM = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.CC.Controller);
196          m_EVENT_ID = DECLARE_VMINT(m_event, class ScriptEvent, id);          m_EVENT_ID = DECLARE_VMINT(m_event, class ScriptEvent, id);
197          m_EVENT_NOTE = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Key);          m_EVENT_NOTE = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Key);
198          m_EVENT_VELOCITY = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Velocity);          m_EVENT_VELOCITY = DECLARE_VMINT(m_event, class ScriptEvent, cause.Param.Note.Velocity);
199            m_KEY_DOWN.size = 128;
200      }      }
201    
202      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {      VMExecStatus_t InstrumentScriptVM::exec(VMParserContext* parserCtx, ScriptEvent* event) {
# Line 31  namespace LinuxSampler { Line 206  namespace LinuxSampler {
206          // prepare built-in script variables for script execution          // prepare built-in script variables for script execution
207          m_event = event;          m_event = event;
208          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];          m_CC.data = (int8_t*) &pEngineChannel->ControllerTable[0];
209            m_KEY_DOWN.data = &pEngineChannel->GetMidiKeyboardManager()->KeyDown[0];
210    
211          // if script is in start condition, then do mandatory MIDI event          // if script is in start condition, then do mandatory MIDI event
212          // preprocessing tasks, which essentially means updating i.e. controller          // preprocessing tasks, which essentially means updating i.e. controller
# Line 86  namespace LinuxSampler { Line 262  namespace LinuxSampler {
262    
263          // now add own built-in variables          // now add own built-in variables
264          m["%CC"] = &m_CC;          m["%CC"] = &m_CC;
265          //m["%KEY_DOWN"] = &m_KEY_DOWN;          m["%KEY_DOWN"] = &m_KEY_DOWN;
266          //m["%POLY_AT"] = &m_POLY_AT;          //m["%POLY_AT"] = &m_POLY_AT;
267    
268          return m;          return m;
# Line 98  namespace LinuxSampler { Line 274  namespace LinuxSampler {
274    
275          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;          m["$VCC_MONO_AT"] = CTRL_TABLE_IDX_AFTERTOUCH;
276          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;          m["$VCC_PITCH_BEND"] = CTRL_TABLE_IDX_PITCHBEND;
277            for (int i = 0; i < INSTR_SCRIPT_EVENT_GROUPS; ++i) {
278                m["$MARK_" + ToString(i+1)] = i;
279            }
280    
281          return m;          return m;
282      }      }
# Line 108  namespace LinuxSampler { Line 287  namespace LinuxSampler {
287          else if (name == "set_controller") return &m_fnSetController;          else if (name == "set_controller") return &m_fnSetController;
288          else if (name == "ignore_event") return &m_fnIgnoreEvent;          else if (name == "ignore_event") return &m_fnIgnoreEvent;
289          else if (name == "ignore_controller") return &m_fnIgnoreController;          else if (name == "ignore_controller") return &m_fnIgnoreController;
290            else if (name == "note_off") return &m_fnNoteOff;
291            else if (name == "set_event_mark") return &m_fnSetEventMark;
292            else if (name == "delete_event_mark") return &m_fnDeleteEventMark;
293            else if (name == "by_marks") return &m_fnByMarks;
294    
295          // built-in script functions of derived VM class          // built-in script functions of derived VM class
296          return ScriptVM::functionByName(name);          return ScriptVM::functionByName(name);
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