/[svn]/libgig/trunk/src/gig.h
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revision 24 by schoenebeck, Fri Dec 26 16:15:31 2003 UTC revision 365 by persson, Thu Feb 10 19:16:31 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 168  namespace gig { Line 164  namespace gig {
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      /** Defines how attenuation (=gain / VCA) is controlled by. */      /**
168      typedef enum {       * Defines a controller that has a certain contrained influence on a
169          attenuation_ctrl_none              = 0x00,       * particular synthesis parameter (used to define attenuation controller,
170          attenuation_ctrl_modwheel          = 0x03, ///< Modulation Wheel (MIDI Controller 1)       * EG1 controller and EG2 controller).
171          attenuation_ctrl_breath            = 0x05, ///< Breath Controller (Coarse, MIDI Controller 2)       *
172          attenuation_ctrl_foot              = 0x07, ///< Foot Pedal (Coarse, MIDI Controller 4)       * You should use the respective <i>typedef</i> (means either
173          attenuation_ctrl_effect1           = 0x0d, ///< Effect Controller 1 (Coarse, MIDI Controller 12)       * attenuation_ctrl_t, eg1_ctrl_t or eg2_ctrl_t) in your code!
174          attenuation_ctrl_effect2           = 0x0f, ///< Effect Controller 2 (Coarse, MIDI Controller 13)       */
175          attenuation_ctrl_genpurpose1       = 0x11, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)      struct leverage_ctrl_t {
176          attenuation_ctrl_genpurpose2       = 0x13, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)          typedef enum {
177          attenuation_ctrl_genpurpose3       = 0x15, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)              type_none              = 0x00, ///< No controller defined
178          attenuation_ctrl_genpurpose4       = 0x17, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)              type_channelaftertouch = 0x2f, ///< Channel Key Pressure
179          attenuation_ctrl_portamentotime    = 0x0b, ///< Portamento Time (Coarse, MIDI Controller 5)              type_velocity          = 0xff, ///< Key Velocity
180          attenuation_ctrl_sustainpedal      = 0x01, ///< Sustain Pedal (MIDI Controller 64)              type_controlchange     = 0xfe  ///< Ordinary MIDI control change controller, see field 'controller_number'
181          attenuation_ctrl_portamento        = 0x19, ///< Portamento (MIDI Controller 65)          } type_t;
182          attenuation_ctrl_sostenutopedal    = 0x1b, ///< Sostenuto Pedal (MIDI Controller 66)  
183          attenuation_ctrl_softpedal         = 0x09, ///< Soft Pedal (MIDI Controller 67)          type_t type;              ///< Controller type
184          attenuation_ctrl_genpurpose5       = 0x1d, ///< General Purpose Controller 5 (Button, MIDI Controller 80)          uint   controller_number; ///< MIDI controller number if this controller is a control change controller, 0 otherwise
185          attenuation_ctrl_genpurpose6       = 0x1f, ///< General Purpose Controller 6 (Button, MIDI Controller 81)      };
186          attenuation_ctrl_genpurpose7       = 0x21, ///< General Purpose Controller 7 (Button, MIDI Controller 82)  
187          attenuation_ctrl_genpurpose8       = 0x23, ///< General Purpose Controller 8 (Button, MIDI Controller 83)      /**
188          attenuation_ctrl_effect1depth      = 0x25, ///< Effect 1 Depth (MIDI Controller 91)       * Defines controller influencing attenuation.
189          attenuation_ctrl_effect2depth      = 0x27, ///< Effect 2 Depth (MIDI Controller 92)       *
190          attenuation_ctrl_effect3depth      = 0x29, ///< Effect 3 Depth (MIDI Controller 93)       * @see leverage_ctrl_t
191          attenuation_ctrl_effect4depth      = 0x2b, ///< Effect 4 Depth (MIDI Controller 94)       */
192          attenuation_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)      typedef leverage_ctrl_t attenuation_ctrl_t;
193          attenuation_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure  
194          attenuation_ctrl_velocity          = 0xff  ///< Key Velocity      /**
195      } attenuation_ctrl_t, eg1_ctrl_t, eg2_ctrl_t;       * Defines controller influencing envelope generator 1.
196         *
197         * @see leverage_ctrl_t
198         */
199        typedef leverage_ctrl_t eg1_ctrl_t;
200    
201        /**
202         * Defines controller influencing envelope generator 2.
203         *
204         * @see leverage_ctrl_t
205         */
206        typedef leverage_ctrl_t eg2_ctrl_t;
207    
208      /**      /**
209       * Defines the type of dimension, that is how the dimension zones (and       * Defines the type of dimension, that is how the dimension zones (and
# Line 212  namespace gig { Line 219  namespace gig {
219          dimension_velocity          = 0x82, ///< Key Velocity (this is the only dimension where the ranges can exactly be defined).          dimension_velocity          = 0x82, ///< Key Velocity (this is the only dimension where the ranges can exactly be defined).
220          dimension_channelaftertouch = 0x83, ///< Channel Key Pressure          dimension_channelaftertouch = 0x83, ///< Channel Key Pressure
221          dimension_releasetrigger    = 0x84, ///< Special dimension for triggering samples on releasing a key.          dimension_releasetrigger    = 0x84, ///< Special dimension for triggering samples on releasing a key.
222          dimension_keyboard          = 0x85, ///< Key Position          dimension_keyboard          = 0x85, ///< Dimension for keyswitching
223          dimension_modwheel          = 0x01, ///< Modulation Wheel (MIDI Controller 1)          dimension_modwheel          = 0x01, ///< Modulation Wheel (MIDI Controller 1)
224          dimension_breath            = 0x02, ///< Breath Controller (Coarse, MIDI Controller 2)          dimension_breath            = 0x02, ///< Breath Controller (Coarse, MIDI Controller 2)
225          dimension_foot              = 0x04, ///< Foot Pedal (Coarse, MIDI Controller 4)          dimension_foot              = 0x04, ///< Foot Pedal (Coarse, MIDI Controller 4)
# Line 267  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.
283         */
284      struct crossfade_t {      struct crossfade_t {
285          #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  
286          uint8_t out_end;    ///< End postition of fade out.          uint8_t out_end;    ///< End postition of fade out.
287          uint8_t out_start;  ///< Start position of fade out.          uint8_t out_start;  ///< Start position of fade out.
288          uint8_t in_end;     ///< End position of fade in.          uint8_t in_end;     ///< End position of fade in.
289          uint8_t in_start;   ///< Start position of fade in.          uint8_t in_start;   ///< Start position of fade in.
290            #else // little endian
291            uint8_t in_start;   ///< Start position of fade in.
292            uint8_t in_end;     ///< End position of fade in.
293            uint8_t out_start;  ///< Start position of fade out.
294            uint8_t out_end;    ///< End postition of fade out.
295          #endif // WORDS_BIGENDIAN          #endif // WORDS_BIGENDIAN
296      };      };
297    
# Line 293  namespace gig { Line 306  namespace gig {
306      class File;      class File;
307      class Instrument;      class Instrument;
308      class Sample;      class Sample;
309        class Region;
310    
311      /** Encapsulates articulation information of a dimension region.      /** Encapsulates articulation information of a dimension region.
312       *       *
# Line 321  namespace gig { Line 335  namespace gig {
335              bool               EG1Hold;                       ///< If <i>true</i>, Decay1 stage should be postponed until the sample reached the sample loop start.              bool               EG1Hold;                       ///< If <i>true</i>, Decay1 stage should be postponed until the sample reached the sample loop start.
336              eg1_ctrl_t         EG1Controller;                 ///< MIDI Controller which has influence on sample amplitude EG parameters (attack, decay, release).              eg1_ctrl_t         EG1Controller;                 ///< MIDI Controller which has influence on sample amplitude EG parameters (attack, decay, release).
337              bool               EG1ControllerInvert;           ///< Invert values coming from defined EG1 controller.              bool               EG1ControllerInvert;           ///< Invert values coming from defined EG1 controller.
338              uint8_t            EG1ControllerAttackInfluence;  ///< Amount EG1 Controller has influence on the EG1 Attack time.              uint8_t            EG1ControllerAttackInfluence;  ///< Amount EG1 Controller has influence on the EG1 Attack time (0 - 3, where 0 means off).
339              uint8_t            EG1ControllerDecayInfluence;   ///< Amount EG1 Controller has influence on the EG1 Decay time.              uint8_t            EG1ControllerDecayInfluence;   ///< Amount EG1 Controller has influence on the EG1 Decay time (0 - 3, where 0 means off).
340              uint8_t            EG1ControllerReleaseInfluence; ///< Amount EG1 Controller has influence on the EG1 Release time.              uint8_t            EG1ControllerReleaseInfluence; ///< Amount EG1 Controller has influence on the EG1 Release time (0 - 3, where 0 means off).
341              double             LFO1Frequency;                 ///< Frequency of the sample amplitude LFO (0.10 - 10.00 Hz).              double             LFO1Frequency;                 ///< Frequency of the sample amplitude LFO (0.10 - 10.00 Hz).
342              uint16_t           LFO1InternalDepth;             ///< Firm pitch of the sample amplitude LFO (0 - 1200 cents).              uint16_t           LFO1InternalDepth;             ///< Firm pitch of the sample amplitude LFO (0 - 1200 cents).
343              uint16_t           LFO1ControlDepth;              ///< Controller depth influencing sample amplitude LFO pitch (0 - 1200 cents).              uint16_t           LFO1ControlDepth;              ///< Controller depth influencing sample amplitude LFO pitch (0 - 1200 cents).
# Line 340  namespace gig { Line 354  namespace gig {
354              double             EG2Release;                    ///< Release time of the filter cutoff EG (0.000 - 60.000s).              double             EG2Release;                    ///< Release time of the filter cutoff EG (0.000 - 60.000s).
355              eg2_ctrl_t         EG2Controller;                 ///< MIDI Controller which has influence on filter cutoff EG parameters (attack, decay, release).              eg2_ctrl_t         EG2Controller;                 ///< MIDI Controller which has influence on filter cutoff EG parameters (attack, decay, release).
356              bool               EG2ControllerInvert;           ///< Invert values coming from defined EG2 controller.              bool               EG2ControllerInvert;           ///< Invert values coming from defined EG2 controller.
357              uint8_t            EG2ControllerAttackInfluence;  ///< Amount EG2 Controller has influence on the EG2 Attack time.              uint8_t            EG2ControllerAttackInfluence;  ///< Amount EG2 Controller has influence on the EG2 Attack time (0 - 3, where 0 means off).
358              uint8_t            EG2ControllerDecayInfluence;   ///< Amount EG2 Controller has influence on the EG2 Decay time.              uint8_t            EG2ControllerDecayInfluence;   ///< Amount EG2 Controller has influence on the EG2 Decay time (0 - 3, where 0 means off).
359              uint8_t            EG2ControllerReleaseInfluence; ///< Amount EG2 Controller has influence on the EG2 Release time.              uint8_t            EG2ControllerReleaseInfluence; ///< Amount EG2 Controller has influence on the EG2 Release time (0 - 3, where 0 means off).
360              double             LFO2Frequency;                 ///< Frequency of the filter cutoff LFO (0.10 - 10.00 Hz).              double             LFO2Frequency;                 ///< Frequency of the filter cutoff LFO (0.10 - 10.00 Hz).
361              uint16_t           LFO2InternalDepth;             ///< Firm pitch of the filter cutoff LFO (0 - 1200 cents).              uint16_t           LFO2InternalDepth;             ///< Firm pitch of the filter cutoff LFO (0 - 1200 cents).
362              uint16_t           LFO2ControlDepth;              ///< Controller depth influencing filter cutoff LFO pitch (0 - 1200).              uint16_t           LFO2ControlDepth;              ///< Controller depth influencing filter cutoff LFO pitch (0 - 1200).
# Line 371  namespace gig { Line 385  namespace gig {
385              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.
386              uint8_t            VCFKeyboardTrackingBreakpoint; ///< See VCFKeyboardTracking (0 - 127).              uint8_t            VCFKeyboardTrackingBreakpoint; ///< See VCFKeyboardTracking (0 - 127).
387              // Key Velocity Transformations              // Key Velocity Transformations
388              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).
389              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).
390              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127 (usually you don't have to interpret this parameter, use GetVelocityAttenuation() instead)
391              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.
392              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).
393              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8
# Line 383  namespace gig { Line 397  namespace gig {
397              dim_bypass_ctrl_t  DimensionBypass;               ///< If defined, the MIDI controller can switch on/off the dimension in realtime.              dim_bypass_ctrl_t  DimensionBypass;               ///< If defined, the MIDI controller can switch on/off the dimension in realtime.
398              int8_t             Pan;                           ///< Panorama / Balance (-64..0..63 <-> left..middle..right)              int8_t             Pan;                           ///< Panorama / Balance (-64..0..63 <-> left..middle..right)
399              bool               SelfMask;                      ///< If <i>true</i>: high velocity notes will stop low velocity notes at the same note, with that you can save voices that wouldn't be audible anyway.              bool               SelfMask;                      ///< If <i>true</i>: high velocity notes will stop low velocity notes at the same note, with that you can save voices that wouldn't be audible anyway.
400              attenuation_ctrl_t AttenuationControl;            ///< MIDI Controller which has influence on the volume level of the sample (or entire sample group).              attenuation_ctrl_t AttenuationController;         ///< MIDI Controller which has influence on the volume level of the sample (or entire sample group).
401              bool               InvertAttenuationControl;      ///< Inverts the values coming from the defined Attenuation Controller.              bool               InvertAttenuationController;   ///< Inverts the values coming from the defined Attenuation Controller.
402              uint8_t            AttenuationControlTreshold;    ///< 0-127              uint8_t            AttenuationControllerThreshold;///< 0-127
403              uint8_t            ChannelOffset;                 ///< Audio output where the audio signal of the dimension region should be routed to (0 - 9).              uint8_t            ChannelOffset;                 ///< Audio output where the audio signal of the dimension region should be routed to (0 - 9).
404              bool               SustainDefeat;                 ///< If <i>true</i>: Sustain pedal will not hold a note.              bool               SustainDefeat;                 ///< If <i>true</i>: Sustain pedal will not hold a note.
405              bool               MSDecode;                      ///< Gigastudio flag: defines if Mid Side Recordings should be decoded.              bool               MSDecode;                      ///< Gigastudio flag: defines if Mid Side Recordings should be decoded.
# Line 404  namespace gig { Line 418  namespace gig {
418             ~DimensionRegion();             ~DimensionRegion();
419              friend class Region;              friend class Region;
420          private:          private:
421                typedef enum { ///< Used to decode attenuation, EG1 and EG2 controller
422                    _lev_ctrl_none              = 0x00,
423                    _lev_ctrl_modwheel          = 0x03, ///< Modulation Wheel (MIDI Controller 1)
424                    _lev_ctrl_breath            = 0x05, ///< Breath Controller (Coarse, MIDI Controller 2)
425                    _lev_ctrl_foot              = 0x07, ///< Foot Pedal (Coarse, MIDI Controller 4)
426                    _lev_ctrl_effect1           = 0x0d, ///< Effect Controller 1 (Coarse, MIDI Controller 12)
427                    _lev_ctrl_effect2           = 0x0f, ///< Effect Controller 2 (Coarse, MIDI Controller 13)
428                    _lev_ctrl_genpurpose1       = 0x11, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)
429                    _lev_ctrl_genpurpose2       = 0x13, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)
430                    _lev_ctrl_genpurpose3       = 0x15, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)
431                    _lev_ctrl_genpurpose4       = 0x17, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)
432                    _lev_ctrl_portamentotime    = 0x0b, ///< Portamento Time (Coarse, MIDI Controller 5)
433                    _lev_ctrl_sustainpedal      = 0x01, ///< Sustain Pedal (MIDI Controller 64)
434                    _lev_ctrl_portamento        = 0x19, ///< Portamento (MIDI Controller 65)
435                    _lev_ctrl_sostenutopedal    = 0x1b, ///< Sostenuto Pedal (MIDI Controller 66)
436                    _lev_ctrl_softpedal         = 0x09, ///< Soft Pedal (MIDI Controller 67)
437                    _lev_ctrl_genpurpose5       = 0x1d, ///< General Purpose Controller 5 (Button, MIDI Controller 80)
438                    _lev_ctrl_genpurpose6       = 0x1f, ///< General Purpose Controller 6 (Button, MIDI Controller 81)
439                    _lev_ctrl_genpurpose7       = 0x21, ///< General Purpose Controller 7 (Button, MIDI Controller 82)
440                    _lev_ctrl_genpurpose8       = 0x23, ///< General Purpose Controller 8 (Button, MIDI Controller 83)
441                    _lev_ctrl_effect1depth      = 0x25, ///< Effect 1 Depth (MIDI Controller 91)
442                    _lev_ctrl_effect2depth      = 0x27, ///< Effect 2 Depth (MIDI Controller 92)
443                    _lev_ctrl_effect3depth      = 0x29, ///< Effect 3 Depth (MIDI Controller 93)
444                    _lev_ctrl_effect4depth      = 0x2b, ///< Effect 4 Depth (MIDI Controller 94)
445                    _lev_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)
446                    _lev_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure
447                    _lev_ctrl_velocity          = 0xff  ///< Key Velocity
448                } _lev_ctrl_t;
449              typedef std::map<uint32_t, double*> VelocityTableMap;              typedef std::map<uint32_t, double*> VelocityTableMap;
450    
451              static uint              Instances;                  ///< Number of DimensionRegion instances.              static uint              Instances;                  ///< Number of DimensionRegion instances.
452              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).
453              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.
454    
455                leverage_ctrl_t DecodeLeverageController(_lev_ctrl_t EncodedController);
456                double* CreateVelocityTable(curve_type_t curveType, uint8_t depth, uint8_t scaling);
457      };      };
458    
459      /** Encapsulates sample waves used for playback. */      /** Encapsulates sample waves used for playback. */
# Line 447  namespace gig { Line 492  namespace gig {
492          protected:          protected:
493              static unsigned int  Instances;               ///< Number of instances of class Sample.              static unsigned int  Instances;               ///< Number of instances of class Sample.
494              static unsigned long DecompressionBufferSize; ///< Current size of the decompression buffer.              static unsigned long DecompressionBufferSize; ///< Current size of the decompression buffer.
495              static void*         pDecompressionBuffer;    ///< Small buffer used for decompression only.              static unsigned char* pDecompressionBuffer;   ///< Small buffer used for decompression only.
496              unsigned long        FrameOffset;             ///< Current offset (sample points) in current sample frame (for decompression only).              unsigned long        FrameOffset;             ///< Current offset (sample points) in current sample frame (for decompression only).
497              unsigned long*       FrameTable;              ///< For positioning within compressed samples only: stores the offset values for each frame.              unsigned long*       FrameTable;              ///< For positioning within compressed samples only: stores the offset values for each frame.
498              unsigned long        SamplePos;               ///< For compressed samples only: stores the current position (in sample points).              unsigned long        SamplePos;               ///< For compressed samples only: stores the current position (in sample points).
499                unsigned long        SamplesInLastFrame;      ///< For compressed samples only: length of the last sample frame.
500                unsigned long        WorstCaseFrameSize;      ///< For compressed samples only: size (in bytes) of the largest possible sample frame.
501                unsigned long        SamplesPerFrame;         ///< For compressed samples only: number of samples in a full sample frame.
502              buffer_t             RAMCache;                ///< Buffers samples (already uncompressed) in RAM.              buffer_t             RAMCache;                ///< Buffers samples (already uncompressed) in RAM.
503    
504              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset);              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset);
# Line 515  namespace gig { Line 563  namespace gig {
563                  return (A > B) ? B : A;                  return (A > B) ? B : A;
564              }              }
565              inline long Abs(long val) { return (val > 0) ? val : -val; }              inline long Abs(long val) { return (val > 0) ? val : -val; }
566    
567                // Guess size (in bytes) of a compressed sample
568                inline unsigned long GuessSize(unsigned long samples) {
569                    // 16 bit: assume all frames are compressed - 1 byte
570                    // per sample and 5 bytes header per 2048 samples
571    
572                    // 24 bit: assume next best compression rate - 1.5
573                    // bytes per sample and 13 bytes header per 256
574                    // samples
575                    const unsigned long size =
576                        BitDepth == 24 ? samples + (samples >> 1) + (samples >> 8) * 13
577                                       : samples + (samples >> 10) * 5;
578                    // Double for stereo and add one worst case sample
579                    // frame
580                    return (Channels == 2 ? size << 1 : size) + WorstCaseFrameSize;
581                }
582          private:          private:
583              void ScanCompressedSample();              void ScanCompressedSample();
584              friend class File;              friend class File;
# Line 526  namespace gig { Line 590  namespace gig {
590      class Region : public DLS::Region {      class Region : public DLS::Region {
591          public:          public:
592              unsigned int            Dimensions;               ///< Number of defined dimensions.              unsigned int            Dimensions;               ///< Number of defined dimensions.
593              dimension_def_t         pDimensionDefinitions[5]; ///< Defines the five possible dimensions (the dimension's controller and number of bits/splits).              dimension_def_t         pDimensionDefinitions[8]; ///< Defines the five (gig2) or eight (gig3) possible dimensions (the dimension's controller and number of bits/splits).
594              uint32_t                DimensionRegions;         ///< Total number of DimensionRegions this Region contains.              uint32_t                DimensionRegions;         ///< Total number of DimensionRegions this Region contains.
595              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[256];   ///< Pointer array to the 32 (gig2) or 256 (gig3) 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).
596                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.
597    
598              DimensionRegion* GetDimensionRegionByValue(uint Dim4Val, uint Dim3Val, uint Dim2Val, uint Dim1Val, uint Dim0Val);              DimensionRegion* GetDimensionRegionByValue(const uint DimValues[8]);
599              DimensionRegion* GetDimensionRegionByBit(uint8_t Dim4Bit, uint8_t Dim3Bit, uint8_t Dim2Bit, uint8_t Dim1Bit, uint8_t Dim0Bit);              DimensionRegion* GetDimensionRegionByBit(const uint8_t DimBits[8]);
600              Sample*          GetSample();              Sample*          GetSample();
601          protected:          protected:
602              uint8_t VelocityTable[128]; ///< For velocity dimensions with custom defined zone ranges only: used for fast converting from velocity MIDI value to dimension bit number.              uint8_t VelocityTable[128]; ///< For velocity dimensions with custom defined zone ranges only: used for fast converting from velocity MIDI value to dimension bit number.
# Line 602  namespace gig { Line 667  namespace gig {
667              Instrument* GetFirstInstrument(); ///< Returns a pointer to the first <i>Instrument</i> object of the file, <i>NULL</i> otherwise.              Instrument* GetFirstInstrument(); ///< Returns a pointer to the first <i>Instrument</i> object of the file, <i>NULL</i> otherwise.
668              Instrument* GetNextInstrument();  ///< Returns a pointer to the next <i>Instrument</i> object of the file, <i>NULL</i> otherwise.              Instrument* GetNextInstrument();  ///< Returns a pointer to the next <i>Instrument</i> object of the file, <i>NULL</i> otherwise.
669              Instrument* GetInstrument(uint index);              Instrument* GetInstrument(uint index);
670             ~File() {};             ~File();
671          protected:          protected:
672              typedef std::list<Sample*>     SampleList;              typedef std::list<Sample*>     SampleList;
673              typedef std::list<Instrument*> InstrumentList;              typedef std::list<Instrument*> InstrumentList;
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