/[svn]/libgig/trunk/src/gig.h
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revision 1358 by schoenebeck, Sun Sep 30 18:13:33 2007 UTC revision 2044 by persson, Sun Jan 10 12:58:51 2010 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file access library    *   *   libgig - C++ cross-platform Gigasampler format file access library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003-2007 by Christian Schoenebeck                      *   *   Copyright (C) 2003-2010 by Christian Schoenebeck                      *
6   *                              <cuse@users.sourceforge.net>               *   *                              <cuse@users.sourceforge.net>               *
7   *                                                                         *   *                                                                         *
8   *   This library is free software; you can redistribute it and/or modify  *   *   This library is free software; you can redistribute it and/or modify  *
# Line 31  Line 31 
31  # define LIST_TYPE_3EWL 0x3365776C  # define LIST_TYPE_3EWL 0x3365776C
32  # define LIST_TYPE_3GRI 0x33677269  # define LIST_TYPE_3GRI 0x33677269
33  # define LIST_TYPE_3GNL 0x33676E6C  # define LIST_TYPE_3GNL 0x33676E6C
 # define CHUNK_ID_SMPL  0x736D706C  
34  # define CHUNK_ID_3GIX  0x33676978  # define CHUNK_ID_3GIX  0x33676978
35  # define CHUNK_ID_3EWA  0x33657761  # define CHUNK_ID_3EWA  0x33657761
36  # define CHUNK_ID_3LNK  0x336C6E6B  # define CHUNK_ID_3LNK  0x336C6E6B
# Line 45  Line 44 
44  # define LIST_TYPE_3EWL 0x6C776533  # define LIST_TYPE_3EWL 0x6C776533
45  # define LIST_TYPE_3GRI 0x69726733  # define LIST_TYPE_3GRI 0x69726733
46  # define LIST_TYPE_3GNL 0x6C6E6733  # define LIST_TYPE_3GNL 0x6C6E6733
 # define CHUNK_ID_SMPL  0x6C706D73  
47  # define CHUNK_ID_3GIX  0x78696733  # define CHUNK_ID_3GIX  0x78696733
48  # define CHUNK_ID_3EWA  0x61776533  # define CHUNK_ID_3EWA  0x61776533
49  # define CHUNK_ID_3LNK  0x6B6E6C33  # define CHUNK_ID_3LNK  0x6B6E6C33
# Line 323  namespace gig { Line 321  namespace gig {
321          progress_t();          progress_t();
322      };      };
323    
     /** @brief CRC-32 checksum implementation  
      *  
      * This class is used to calculate checksums of the sample data in  
      * a gig file. The checksums are stored in the 3crc chunk of the  
      * gig file and automatically updated when a sample is written  
      * with Sample::Write().  
      */  
     class CRC {  
     private:  
         uint32_t value;  
         static const uint32_t* table;  
         static uint32_t* initTable();  
     public:  
         CRC() {  
             reset();  
         }  
         void reset() {  
             value = 0xffffffff;  
         }  
         void update(unsigned char* buf, int len) {  
             for (int i = 0 ; i < len ; i++) {  
                 value = table[(value ^ buf[i]) & 0xff] ^ (value >> 8);  
             }  
         }  
         uint32_t getValue() {  
             return value ^ 0xffffffff;  
         }  
     };  
   
324      // just symbol prototyping      // just symbol prototyping
325      class File;      class File;
326      class Instrument;      class Instrument;
# Line 607  namespace gig { Line 576  namespace gig {
576              unsigned long        FileNo;                  ///< File number (> 0 when sample is stored in an extension file, 0 when it's in the gig)              unsigned long        FileNo;                  ///< File number (> 0 when sample is stored in an extension file, 0 when it's in the gig)
577              RIFF::Chunk*         pCk3gix;              RIFF::Chunk*         pCk3gix;
578              RIFF::Chunk*         pCkSmpl;              RIFF::Chunk*         pCkSmpl;
579              CRC                  crc;                     ///< CRC-32 checksum of the raw sample data              uint32_t             crc;                     ///< CRC-32 checksum of the raw sample data
580    
581              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset, unsigned long fileNo = 0);              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset, unsigned long fileNo = 0);
582             ~Sample();             ~Sample();
# Line 668  namespace gig { Line 637  namespace gig {
637              friend class Instrument;              friend class Instrument;
638      };      };
639    
640        /** Abstract base class for all MIDI rules. */
641        class MidiRule {
642            public:
643                virtual ~MidiRule() { }
644        };
645    
646        /** MIDI rule for triggering notes by control change events. */
647        class MidiRuleCtrlTrigger : public MidiRule {
648            public:
649                uint8_t ControllerNumber;   ///< MIDI controller number.
650                uint8_t Triggers;           ///< Number of triggers.
651                struct trigger_t {
652                    uint8_t TriggerPoint;   ///< The CC value to pass for the note to be triggered.
653                    bool    Descending;     ///< If the change in CC value should be downwards.
654                    uint8_t VelSensitivity; ///< How sensitive the velocity should be to the speed of the controller change.
655                    uint8_t Key;            ///< Key to trigger.
656                    bool    NoteOff;        ///< If a note off should be triggered instead of a note on.
657                    uint8_t Velocity;       ///< Velocity of the note to trigger. 255 means that velocity should depend on the speed of the controller change.
658                    bool    OverridePedal;  ///< If a note off should be triggered even if the sustain pedal is down.
659                } pTriggers[32];
660    
661            protected:
662                MidiRuleCtrlTrigger(RIFF::Chunk* _3ewg);
663                friend class Instrument;
664        };
665    
666      /** Provides all neccessary information for the synthesis of an <i>Instrument</i>. */      /** Provides all neccessary information for the synthesis of an <i>Instrument</i>. */
667      class Instrument : protected DLS::Instrument {      class Instrument : protected DLS::Instrument {
668          public:          public:
# Line 700  namespace gig { Line 695  namespace gig {
695              virtual void UpdateChunks();              virtual void UpdateChunks();
696              // own methods              // own methods
697              Region*   GetRegion(unsigned int Key);              Region*   GetRegion(unsigned int Key);
698                MidiRule* GetMidiRule(int i);
699          protected:          protected:
700              Region*   RegionKeyTable[128]; ///< fast lookup for the corresponding Region of a MIDI key              Region*   RegionKeyTable[128]; ///< fast lookup for the corresponding Region of a MIDI key
701    
# Line 708  namespace gig { Line 704  namespace gig {
704              void UpdateRegionKeyTable();              void UpdateRegionKeyTable();
705              friend class File;              friend class File;
706              friend class Region; // so Region can call UpdateRegionKeyTable()              friend class Region; // so Region can call UpdateRegionKeyTable()
707            private:
708                MidiRule** pMidiRules;
709      };      };
710    
711      /** @brief Group of Gigasampler objects      /** @brief Group of Gigasampler objects
# Line 778  namespace gig { Line 776  namespace gig {
776              Group*      AddGroup();              Group*      AddGroup();
777              void        DeleteGroup(Group* pGroup);              void        DeleteGroup(Group* pGroup);
778              void        DeleteGroupOnly(Group* pGroup);              void        DeleteGroupOnly(Group* pGroup);
779                void        SetAutoLoad(bool b);
780                bool        GetAutoLoad();
781              virtual    ~File();              virtual    ~File();
782              virtual void UpdateChunks();              virtual void UpdateChunks();
783          protected:          protected:
# Line 793  namespace gig { Line 793  namespace gig {
793              friend class Sample;              friend class Sample;
794              friend class Group; // so Group can access protected member pRIFF              friend class Group; // so Group can access protected member pRIFF
795          private:          private:
             static const DLS::Info::FixedStringLength FixedStringLengths[];  
796              std::list<Group*>*          pGroups;              std::list<Group*>*          pGroups;
797              std::list<Group*>::iterator GroupsIterator;              std::list<Group*>::iterator GroupsIterator;
798                bool                        bAutoLoad;
799      };      };
800    
801      /**      /**
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