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revision 36 by schoenebeck, Wed Mar 10 21:34:28 2004 UTC revision 345 by schoenebeck, Fri Jan 21 16:40:37 2005 UTC
# Line 2  Line 2 
2   *                                                                         *   *                                                                         *
3   *   libgig - C++ cross-platform Gigasampler format file loader library    *   *   libgig - C++ cross-platform Gigasampler format file loader library    *
4   *                                                                         *   *                                                                         *
5   *   Copyright (C) 2003 by Christian Schoenebeck                           *   *   Copyright (C) 2003, 2004 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  *
9   *   it under the terms of the GNU General Public License as published by  *   *   it under the terms of the GNU General Public License as published by  *
# Line 63  Line 63 
63  #define GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(x)                  ((x >> 1) & 0x03)  #define GIG_EG_CTR_ATTACK_INFLUENCE_EXTRACT(x)                  ((x >> 1) & 0x03)
64  #define GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(x)                   ((x >> 3) & 0x03)  #define GIG_EG_CTR_DECAY_INFLUENCE_EXTRACT(x)                   ((x >> 3) & 0x03)
65  #define GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(x)                 ((x >> 5) & 0x03)  #define GIG_EG_CTR_RELEASE_INFLUENCE_EXTRACT(x)                 ((x >> 5) & 0x03)
 //TODO: the transformation functions are not very accurate compared to the original ones  
 #define GIG_VELOCITY_TRANSFORM_NONLINEAR(x,dynamic,scale)       ((1.0-1.0/pow(x,1.0/(129.0-x))) * (1.0+scale/20.0) + (5.0-dynamic)*pow(x/300.0* (1.0+2.0*scale/128.0),2))  
 #define GIG_VELOCITY_TRANSFORM_LINEAR(x,dynamic,scale)          ((1.0+scale*3.0/128.0)/110.0*x+(5.0-dynamic)/5.0+(5.0-dynamic)*scale)  
 #define GIG_VELOCITY_TRANSFORM_SPECIAL(x,dynamic,scale)         ((1.0+9.0*scale/129.0)*(1.0-1.0/pow(x,1.0/(129.0-x))+pow(3.0*x/pow(129,2),2)+pow((5.0-dynamic)*x/500.0,2)))  
66    
67  /** Gigasampler specific classes and definitions */  /** Gigasampler specific classes and definitions */
68  namespace gig {  namespace gig {
# Line 167  namespace gig { Line 163  namespace gig {
163          vcf_res_ctrl_genpurpose5 = 2,           ///< General Purpose Controller 5 (Button, MIDI Controller 80)          vcf_res_ctrl_genpurpose5 = 2,           ///< General Purpose Controller 5 (Button, MIDI Controller 80)
164          vcf_res_ctrl_genpurpose6 = 3            ///< General Purpose Controller 6 (Button, MIDI Controller 81)          vcf_res_ctrl_genpurpose6 = 3            ///< General Purpose Controller 6 (Button, MIDI Controller 81)
165      } vcf_res_ctrl_t;      } vcf_res_ctrl_t;
166        
167      /**      /**
168       * Defines a controller that has a certain contrained influence on a       * Defines a controller that has a certain contrained influence on a
169       * particular synthesis parameter (used to define attenuation controller,       * particular synthesis parameter (used to define attenuation controller,
# Line 183  namespace gig { Line 179  namespace gig {
179              type_velocity          = 0xff, ///< Key Velocity              type_velocity          = 0xff, ///< Key Velocity
180              type_controlchange     = 0xfe  ///< Ordinary MIDI control change controller, see field 'controller_number'              type_controlchange     = 0xfe  ///< Ordinary MIDI control change controller, see field 'controller_number'
181          } type_t;          } type_t;
182            
183          type_t type;              ///< Controller type          type_t type;              ///< Controller type
184          uint   controller_number; ///< MIDI controller number if this controller is a control change controller, 0 otherwise          uint   controller_number; ///< MIDI controller number if this controller is a control change controller, 0 otherwise
185      };      };
186        
187      /**      /**
188       * Defines controller influencing attenuation.       * Defines controller influencing attenuation.
189       *       *
190       * @see leverage_ctrl_t       * @see leverage_ctrl_t
191       */       */
192      typedef leverage_ctrl_t attenuation_ctrl_t;      typedef leverage_ctrl_t attenuation_ctrl_t;
193        
194      /**      /**
195       * Defines controller influencing envelope generator 1.       * Defines controller influencing envelope generator 1.
196       *       *
197       * @see leverage_ctrl_t       * @see leverage_ctrl_t
198       */       */
199      typedef leverage_ctrl_t eg1_ctrl_t;      typedef leverage_ctrl_t eg1_ctrl_t;
200        
201      /**      /**
202       * Defines controller influencing envelope generator 2.       * Defines controller influencing envelope generator 2.
203       *       *
# Line 278  namespace gig { Line 274  namespace gig {
274          vcf_type_bandreject   = 0x03          vcf_type_bandreject   = 0x03
275      } vcf_type_t;      } vcf_type_t;
276    
277      /** Defines the envelope of a crossfade. */      /**
278         * Defines the envelope of a crossfade.
279         *
280         * Note: The default value for crossfade points is 0,0,0,0. Layers with
281         * such a default value should be treated as if they would not have a
282         * crossfade, that is the crossfade volume factor should <b>always</b>
283         * be 1.0f for such layers.
284         */
285      struct crossfade_t {      struct crossfade_t {
286          #if WORDS_BIGENDIAN          #if WORDS_BIGENDIAN
         uint8_t in_start;   ///< Start position of fade in.  
         uint8_t in_end;     ///< End position of fade in.  
         uint8_t out_start;  ///< Start position of fade out.  
         uint8_t out_end;    ///< End postition of fade out.  
         #else // little endian  
287          uint8_t out_end;    ///< End postition of fade out.          uint8_t out_end;    ///< End postition of fade out.
288          uint8_t out_start;  ///< Start position of fade out.          uint8_t out_start;  ///< Start position of fade out.
289          uint8_t in_end;     ///< End position of fade in.          uint8_t in_end;     ///< End position of fade in.
290          uint8_t in_start;   ///< Start position of fade in.          uint8_t in_start;   ///< Start position of fade in.
291            #else // little endian
292            uint8_t in_start;   ///< Start position of fade in.
293            uint8_t in_end;     ///< End position of fade in.
294            uint8_t out_start;  ///< Start position of fade out.
295            uint8_t out_end;    ///< End postition of fade out.
296          #endif // WORDS_BIGENDIAN          #endif // WORDS_BIGENDIAN
297      };      };
298    
# Line 304  namespace gig { Line 307  namespace gig {
307      class File;      class File;
308      class Instrument;      class Instrument;
309      class Sample;      class Sample;
310        class Region;
311    
312      /** Encapsulates articulation information of a dimension region.      /** Encapsulates articulation information of a dimension region.
313       *       *
# Line 382  namespace gig { Line 386  namespace gig {
386              bool               VCFKeyboardTracking;           ///< If <i>true</i>: VCF cutoff frequence will be dependend to the note key position relative to the defined breakpoint value.              bool               VCFKeyboardTracking;           ///< If <i>true</i>: VCF cutoff frequence will be dependend to the note key position relative to the defined breakpoint value.
387              uint8_t            VCFKeyboardTrackingBreakpoint; ///< See VCFKeyboardTracking (0 - 127).              uint8_t            VCFKeyboardTrackingBreakpoint; ///< See VCFKeyboardTracking (0 - 127).
388              // Key Velocity Transformations              // Key Velocity Transformations
389              curve_type_t       VelocityResponseCurve;         ///< Defines a transformation curve to the incoming velocity values affecting amplitude.              curve_type_t       VelocityResponseCurve;         ///< Defines a transformation curve to the incoming velocity values affecting amplitude (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead).
390              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4).              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4) (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead).
391              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127 (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead)
392              curve_type_t       ReleaseVelocityResponseCurve;  ///< Defines a transformation curve to the incoming release veloctiy values affecting envelope times.              curve_type_t       ReleaseVelocityResponseCurve;  ///< Defines a transformation curve to the incoming release veloctiy values affecting envelope times.
393              uint8_t            ReleaseVelocityResponseDepth;  ///< Dynamic range of release velocity affecting envelope time (0 - 4).              uint8_t            ReleaseVelocityResponseDepth;  ///< Dynamic range of release velocity affecting envelope time (0 - 4).
394              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8
# Line 442  namespace gig { Line 446  namespace gig {
446                  _lev_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)                  _lev_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)
447                  _lev_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure                  _lev_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure
448                  _lev_ctrl_velocity          = 0xff  ///< Key Velocity                  _lev_ctrl_velocity          = 0xff  ///< Key Velocity
449              } _lev_ctrl_t;                      } _lev_ctrl_t;
450              typedef std::map<uint32_t, double*> VelocityTableMap;              typedef std::map<uint32_t, double*> VelocityTableMap;
451    
452              static uint              Instances;                  ///< Number of DimensionRegion instances.              static uint              Instances;                  ///< Number of DimensionRegion instances.
453              static VelocityTableMap* pVelocityTables;            ///< Contains the tables corresponding to the various velocity parameters (VelocityResponseCurve and VelocityResponseDepth).              static VelocityTableMap* pVelocityTables;            ///< Contains the tables corresponding to the various velocity parameters (VelocityResponseCurve and VelocityResponseDepth).
454              double*                  pVelocityAttenuationTable;  ///< Points to the velocity table corresponding to the velocity parameters of this DimensionRegion.              double*                  pVelocityAttenuationTable;  ///< Points to the velocity table corresponding to the velocity parameters of this DimensionRegion.
455                
456              leverage_ctrl_t DecodeLeverageController(_lev_ctrl_t EncodedController);              leverage_ctrl_t DecodeLeverageController(_lev_ctrl_t EncodedController);
457                double* CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling);
458      };      };
459    
460      /** Encapsulates sample waves used for playback. */      /** Encapsulates sample waves used for playback. */
# Line 570  namespace gig { Line 575  namespace gig {
575              dimension_def_t         pDimensionDefinitions[5]; ///< Defines the five possible dimensions (the dimension's controller and number of bits/splits).              dimension_def_t         pDimensionDefinitions[5]; ///< Defines the five possible dimensions (the dimension's controller and number of bits/splits).
576              uint32_t                DimensionRegions;         ///< Total number of DimensionRegions this Region contains.              uint32_t                DimensionRegions;         ///< Total number of DimensionRegions this Region contains.
577              DimensionRegion*        pDimensionRegions[32];    ///< Pointer array to the 32 possible dimension regions (reflects NULL for dimension regions not in use). Avoid to access the array directly and better use GetDimensionRegionByValue() instead, but of course in some cases it makes sense to use the array (e.g. iterating through all DimensionRegions).              DimensionRegion*        pDimensionRegions[32];    ///< Pointer array to the 32 possible dimension regions (reflects NULL for dimension regions not in use). Avoid to access the array directly and better use GetDimensionRegionByValue() instead, but of course in some cases it makes sense to use the array (e.g. iterating through all DimensionRegions).
578                unsigned int            Layers;                   ///< Amount of defined layers (1 - 32). A value of 1 actually means no layering, a value > 1 means there is Layer dimension. The same information can of course also be obtained by accessing pDimensionDefinitions.
579    
580              DimensionRegion* GetDimensionRegionByValue(uint Dim4Val, uint Dim3Val, uint Dim2Val, uint Dim1Val, uint Dim0Val);              DimensionRegion* GetDimensionRegionByValue(uint Dim4Val, uint Dim3Val, uint Dim2Val, uint Dim1Val, uint Dim0Val);
581              DimensionRegion* GetDimensionRegionByBit(uint8_t Dim4Bit, uint8_t Dim3Bit, uint8_t Dim2Bit, uint8_t Dim1Bit, uint8_t Dim0Bit);              DimensionRegion* GetDimensionRegionByBit(uint8_t Dim4Bit, uint8_t Dim3Bit, uint8_t Dim2Bit, uint8_t Dim1Bit, uint8_t Dim0Bit);
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