/[svn]/linuxsampler/trunk/src/engines/common/InstrumentScriptVM.h
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revision 2596 by schoenebeck, Thu Jun 5 19:39:12 2014 UTC revision 2645 by schoenebeck, Wed Jun 18 00:14:57 2014 UTC
# Line 11  Line 11 
11  #define LS_INSTRUMENT_SCRIPT_VM_H  #define LS_INSTRUMENT_SCRIPT_VM_H
12    
13  #include "../../common/global.h"  #include "../../common/global.h"
14    #include "../../common/ConstCapacityArray.h"
15  #include "../../scriptvm/ScriptVM.h"  #include "../../scriptvm/ScriptVM.h"
16  #include "Event.h"  #include "Event.h"
17    #include "../../common/Pool.h"
18  #include "InstrumentScriptVMFunctions.h"  #include "InstrumentScriptVMFunctions.h"
19    
20    #define INSTR_SCRIPT_EVENT_GROUPS 28
21    
22  namespace LinuxSampler {  namespace LinuxSampler {
23    
24        class AbstractEngineChannel;
25        class InstrumentScript;
26    
27        /** @brief List of Event IDs.
28         *
29         * Used for built-in script functions:
30         *     by_marks(), set_event_mark(), delete_event_mark()
31         */
32        class EventGroup : protected ConstCapacityArray<int> {
33        public:
34            EventGroup() : ConstCapacityArray<int>(CONFIG_MAX_EVENTS_PER_FRAGMENT), m_script(NULL) {}
35            void insert(int eventID);
36            void erase(int eventID);
37            void setScript(InstrumentScript* pScript) { m_script = pScript; }
38            inline int size() const { return ConstCapacityArray<int>::size(); }
39            inline int& operator[](uint index) { return ConstCapacityArray<int>::operator[](index); }
40            inline const int& operator[](uint index) const { return ConstCapacityArray<int>::operator[](index); }
41        protected:
42            InstrumentScript* m_script;
43        };
44    
45        /** @brief Real-time instrument script VM representation.
46         *
47         * Holds the VM representation of all event handlers of the currently loaded
48         * script, ready to be executed by the sampler engine.
49         *
50         * Even thought scripts (or to be more specific their event handler objects)
51         * are shared between sampler engine channels, the InstrumentScript struct
52         * instances though are not shared. Each sampler engine channel has its own
53         * instance of a InstrumentScript struct. That's important, because this
54         * struct also holds engine channel local informations, for example the
55         * events that occured on the respective engine channel.
56         */
57        struct InstrumentScript {
58            VMParserContext*      parserContext; ///< VM represenation of the currently loaded script or NULL if not script was loaded. Note that it is also not NULL if parser errors occurred!
59            bool                  bHasValidScript; ///< True in case there is a valid script currently loaded, false if script processing shall be skipped.
60            VMEventHandler*       handlerInit; ///< VM representation of script's initilization callback or NULL if current script did not define such an init handler.
61            VMEventHandler*       handlerNote; ///< VM representation of script's MIDI note on callback or NULL if current script did not define such an event handler.
62            VMEventHandler*       handlerRelease; ///< VM representation of script's MIDI note off callback or NULL if current script did not define such an event handler.
63            VMEventHandler*       handlerController; ///< VM representation of script's MIDI controller callback or NULL if current script did not define such an event handler.
64            Pool<ScriptEvent>*    pEvents; ///< Pool of all available script execution instances. ScriptEvents available to be allocated from the Pool are currently unused / not executiong, whereas the ScriptEvents allocated on the list are currently suspended / have not finished execution yet (@see pKeyEvents).
65            RTList<ScriptEvent>*  pKeyEvents[128]; ///< Stores previously finished executed "note on" script events for the respective active note/key as long as the key/note is active. This is however only done if there is a "note" script event handler and a "release" script event handler defined in the script and both handlers use (reference) polyphonic variables. If that is not the case, then this list is not used at all. So the purpose of pKeyEvents is only to implement preserving/passing polyphonic variable data from "on note .. end on" script block to the respective "on release .. end on" script block.
66            AbstractEngineChannel* pEngineChannel;
67            String                code; ///< Source code of the instrument script. Used in case the sampler engine is changed, in that case a new ScriptVM object is created for the engine and VMParserContext object for this script needs to be recreated as well. Thus the script is then parsed again by passing the source code to recreate the parser context.
68            EventGroup            eventGroups[INSTR_SCRIPT_EVENT_GROUPS]; ///< Used for built-in script functions: by_event_marks(), set_event_mark(), delete_event_mark().
69    
70            InstrumentScript(AbstractEngineChannel* pEngineChannel);
71            ~InstrumentScript();
72    
73            void load(const String& text);
74            void unload();
75            void resetAll();
76        };
77    
78      /** @brief Real-time instrument script virtual machine.      /** @brief Real-time instrument script virtual machine.
79       *       *
80       * Extends the core ScriptVM implementation with MIDI specific built-in       * Extends the core ScriptVM implementation with MIDI specific built-in
# Line 38  namespace LinuxSampler { Line 96  namespace LinuxSampler {
96      protected:      protected:
97          ScriptEvent* m_event; ///< The event currently executed by exec().          ScriptEvent* m_event; ///< The event currently executed by exec().
98    
         Event* m_cause;  
   
99          // buil-in script variables          // buil-in script variables
100          VMInt8Array m_CC;          VMInt8Array m_CC;
101          VMInt8RelPtr m_CC_NUM;          VMInt8RelPtr m_CC_NUM;
102            VMIntRelPtr  m_EVENT_ID;
103          VMInt8RelPtr m_EVENT_NOTE;          VMInt8RelPtr m_EVENT_NOTE;
104          VMInt8RelPtr m_EVENT_VELOCITY;          VMInt8RelPtr m_EVENT_VELOCITY;
105          //VMIntArray m_KEY_DOWN; //TODO: ...          VMInt8Array  m_KEY_DOWN;
106          //VMIntArray m_POLY_AT; //TODO: ...          //VMIntArray m_POLY_AT; //TODO: ...
107          //int m_POLY_AT_NUM; //TODO: ...          //int m_POLY_AT_NUM; //TODO: ...
108    
109          // buil-in script functions          // buil-in script functions
110          InstrumentScriptVMFunction_play_note m_fnPlayNote;          InstrumentScriptVMFunction_play_note m_fnPlayNote;
111            InstrumentScriptVMFunction_set_controller m_fnSetController;
112            InstrumentScriptVMFunction_ignore_event m_fnIgnoreEvent;
113            InstrumentScriptVMFunction_ignore_controller m_fnIgnoreController;
114            InstrumentScriptVMFunction_note_off m_fnNoteOff;
115            InstrumentScriptVMFunction_set_event_mark m_fnSetEventMark;
116            InstrumentScriptVMFunction_delete_event_mark m_fnDeleteEventMark;
117            InstrumentScriptVMFunction_by_marks m_fnByMarks;
118    
119          friend class InstrumentScriptVMFunction_play_note;          friend class InstrumentScriptVMFunction_play_note;
120            friend class InstrumentScriptVMFunction_set_controller;
121            friend class InstrumentScriptVMFunction_ignore_event;
122            friend class InstrumentScriptVMFunction_ignore_controller;
123            friend class InstrumentScriptVMFunction_note_off;
124            friend class InstrumentScriptVMFunction_set_event_mark;
125            friend class InstrumentScriptVMFunction_delete_event_mark;
126            friend class InstrumentScriptVMFunction_by_marks;
127      };      };
128    
129  } // namespace LinuxSampler  } // namespace LinuxSampler
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