/[svn]/libgig/trunk/src/gig.h
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revision 11 by schoenebeck, Sun Nov 16 17:47:00 2003 UTC revision 55 by schoenebeck, Tue Apr 27 09:06:07 2004 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 57  Line 57 
57  #endif // WORDS_BIGENDIAN  #endif // WORDS_BIGENDIAN
58    
59  /** (so far) every exponential paramater in the gig format has a basis of 1.000000008813822 */  /** (so far) every exponential paramater in the gig format has a basis of 1.000000008813822 */
60  #define GIG_EXP_DECODE(x)                       (pow(1.000000008813822, x))  #define GIG_EXP_DECODE(x)                                       (pow(1.000000008813822, x))
61  #define GIG_PITCH_TRACK_EXTRACT(x)              (!(x & 0x01))  #define GIG_PITCH_TRACK_EXTRACT(x)                              (!(x & 0x01))
62  #define GIG_VCF_RESONANCE_CTRL_EXTRACT(x)       ((x >> 4) & 0x03)  #define GIG_VCF_RESONANCE_CTRL_EXTRACT(x)                       ((x >> 4) & 0x03)
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)
66    //TODO: the transformation functions are not very accurate compared to the original ones
67    #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))
68    #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)
69    #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)))
70    
71  /** Gigasampler specific classes and definitions */  /** Gigasampler specific classes and definitions */
72  namespace gig {  namespace gig {
# Line 164  namespace gig { Line 168  namespace gig {
168          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)
169      } vcf_res_ctrl_t;      } vcf_res_ctrl_t;
170    
171      /** Defines how attenuation (=gain / VCA) is controlled by. */      /**
172      typedef enum {       * Defines a controller that has a certain contrained influence on a
173          attenuation_ctrl_none              = 0x00,       * particular synthesis parameter (used to define attenuation controller,
174          attenuation_ctrl_modwheel          = 0x03, ///< Modulation Wheel (MIDI Controller 1)       * EG1 controller and EG2 controller).
175          attenuation_ctrl_breath            = 0x05, ///< Breath Controller (Coarse, MIDI Controller 2)       *
176          attenuation_ctrl_foot              = 0x07, ///< Foot Pedal (Coarse, MIDI Controller 4)       * You should use the respective <i>typedef</i> (means either
177          attenuation_ctrl_effect1           = 0x0d, ///< Effect Controller 1 (Coarse, MIDI Controller 12)       * attenuation_ctrl_t, eg1_ctrl_t or eg2_ctrl_t) in your code!
178          attenuation_ctrl_effect2           = 0x0f, ///< Effect Controller 2 (Coarse, MIDI Controller 13)       */
179          attenuation_ctrl_genpurpose1       = 0x11, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)      struct leverage_ctrl_t {
180          attenuation_ctrl_genpurpose2       = 0x13, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)          typedef enum {
181          attenuation_ctrl_genpurpose3       = 0x15, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)              type_none              = 0x00, ///< No controller defined
182          attenuation_ctrl_genpurpose4       = 0x17, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)              type_channelaftertouch = 0x2f, ///< Channel Key Pressure
183          attenuation_ctrl_portamentotime    = 0x0b, ///< Portamento Time (Coarse, MIDI Controller 5)              type_velocity          = 0xff, ///< Key Velocity
184          attenuation_ctrl_sustainpedal      = 0x01, ///< Sustain Pedal (MIDI Controller 64)              type_controlchange     = 0xfe  ///< Ordinary MIDI control change controller, see field 'controller_number'
185          attenuation_ctrl_portamento        = 0x19, ///< Portamento (MIDI Controller 65)          } type_t;
186          attenuation_ctrl_sostenutopedal    = 0x1b, ///< Sostenuto Pedal (MIDI Controller 66)  
187          attenuation_ctrl_softpedal         = 0x09, ///< Soft Pedal (MIDI Controller 67)          type_t type;              ///< Controller type
188          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
189          attenuation_ctrl_genpurpose6       = 0x1f, ///< General Purpose Controller 6 (Button, MIDI Controller 81)      };
190          attenuation_ctrl_genpurpose7       = 0x21, ///< General Purpose Controller 7 (Button, MIDI Controller 82)  
191          attenuation_ctrl_genpurpose8       = 0x23, ///< General Purpose Controller 8 (Button, MIDI Controller 83)      /**
192          attenuation_ctrl_effect1depth      = 0x25, ///< Effect 1 Depth (MIDI Controller 91)       * Defines controller influencing attenuation.
193          attenuation_ctrl_effect2depth      = 0x27, ///< Effect 2 Depth (MIDI Controller 92)       *
194          attenuation_ctrl_effect3depth      = 0x29, ///< Effect 3 Depth (MIDI Controller 93)       * @see leverage_ctrl_t
195          attenuation_ctrl_effect4depth      = 0x2b, ///< Effect 4 Depth (MIDI Controller 94)       */
196          attenuation_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)      typedef leverage_ctrl_t attenuation_ctrl_t;
197          attenuation_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure  
198          attenuation_ctrl_velocity          = 0xff  ///< Key Velocity      /**
199      } attenuation_ctrl_t, eg1_ctrl_t, eg2_ctrl_t;       * Defines controller influencing envelope generator 1.
200         *
201         * @see leverage_ctrl_t
202         */
203        typedef leverage_ctrl_t eg1_ctrl_t;
204    
205        /**
206         * Defines controller influencing envelope generator 2.
207         *
208         * @see leverage_ctrl_t
209         */
210        typedef leverage_ctrl_t eg2_ctrl_t;
211    
212      /**      /**
213       * 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 278  namespace gig { Line 293  namespace gig {
293          #endif // WORDS_BIGENDIAN          #endif // WORDS_BIGENDIAN
294      };      };
295    
296        /** Reflects the current playback state for a sample. */
297        struct playback_state_t {
298            unsigned long position;          ///< Current position within the sample.
299            bool          reverse;           ///< If playback direction is currently backwards (in case there is a pingpong or reverse loop defined).
300            unsigned long loop_cycles_left;  ///< How many times the loop has still to be passed, this value will be decremented with each loop cycle.
301        };
302    
303      // just symbol prototyping      // just symbol prototyping
304      class File;      class File;
305      class Instrument;      class Instrument;
# Line 310  namespace gig { Line 332  namespace gig {
332              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.
333              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).
334              bool               EG1ControllerInvert;           ///< Invert values coming from defined EG1 controller.              bool               EG1ControllerInvert;           ///< Invert values coming from defined EG1 controller.
335              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).
336              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).
337              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).
338              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).
339              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).
340              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 329  namespace gig { Line 351  namespace gig {
351              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).
352              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).
353              bool               EG2ControllerInvert;           ///< Invert values coming from defined EG2 controller.              bool               EG2ControllerInvert;           ///< Invert values coming from defined EG2 controller.
354              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).
355              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).
356              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).
357              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).
358              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).
359              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 362  namespace gig { Line 384  namespace gig {
384              // Key Velocity Transformations              // Key Velocity Transformations
385              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.
386              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4).              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4).
387              uint8_t            VelocityResponseCurveScaling;              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127
388              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.
389              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).
390              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8
# Line 372  namespace gig { Line 394  namespace gig {
394              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.
395              int8_t             Pan;                           ///< Panorama / Balance (-64..0..63 <-> left..middle..right)              int8_t             Pan;                           ///< Panorama / Balance (-64..0..63 <-> left..middle..right)
396              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.
397              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).
398              bool               InvertAttenuationControl;      ///< Inverts the values coming from the defined Attenuation Controller.              bool               InvertAttenuationController;   ///< Inverts the values coming from the defined Attenuation Controller.
399              uint8_t            AttenuationControlTreshold;    ///< 0-127              uint8_t            AttenuationControllerThreshold;///< 0-127
400              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).
401              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.
402              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 386  namespace gig { Line 408  namespace gig {
408              DLS::Sampler::SampleLoops;              DLS::Sampler::SampleLoops;
409              DLS::Sampler::pSampleLoops;              DLS::Sampler::pSampleLoops;
410    
411                // Methods
412                double GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
413            protected:
414              DimensionRegion(RIFF::List* _3ewl);              DimensionRegion(RIFF::List* _3ewl);
415               ~DimensionRegion();
416                friend class Region;
417            private:
418                typedef enum { ///< Used to decode attenuation, EG1 and EG2 controller
419                    _lev_ctrl_none              = 0x00,
420                    _lev_ctrl_modwheel          = 0x03, ///< Modulation Wheel (MIDI Controller 1)
421                    _lev_ctrl_breath            = 0x05, ///< Breath Controller (Coarse, MIDI Controller 2)
422                    _lev_ctrl_foot              = 0x07, ///< Foot Pedal (Coarse, MIDI Controller 4)
423                    _lev_ctrl_effect1           = 0x0d, ///< Effect Controller 1 (Coarse, MIDI Controller 12)
424                    _lev_ctrl_effect2           = 0x0f, ///< Effect Controller 2 (Coarse, MIDI Controller 13)
425                    _lev_ctrl_genpurpose1       = 0x11, ///< General Purpose Controller 1 (Slider, MIDI Controller 16)
426                    _lev_ctrl_genpurpose2       = 0x13, ///< General Purpose Controller 2 (Slider, MIDI Controller 17)
427                    _lev_ctrl_genpurpose3       = 0x15, ///< General Purpose Controller 3 (Slider, MIDI Controller 18)
428                    _lev_ctrl_genpurpose4       = 0x17, ///< General Purpose Controller 4 (Slider, MIDI Controller 19)
429                    _lev_ctrl_portamentotime    = 0x0b, ///< Portamento Time (Coarse, MIDI Controller 5)
430                    _lev_ctrl_sustainpedal      = 0x01, ///< Sustain Pedal (MIDI Controller 64)
431                    _lev_ctrl_portamento        = 0x19, ///< Portamento (MIDI Controller 65)
432                    _lev_ctrl_sostenutopedal    = 0x1b, ///< Sostenuto Pedal (MIDI Controller 66)
433                    _lev_ctrl_softpedal         = 0x09, ///< Soft Pedal (MIDI Controller 67)
434                    _lev_ctrl_genpurpose5       = 0x1d, ///< General Purpose Controller 5 (Button, MIDI Controller 80)
435                    _lev_ctrl_genpurpose6       = 0x1f, ///< General Purpose Controller 6 (Button, MIDI Controller 81)
436                    _lev_ctrl_genpurpose7       = 0x21, ///< General Purpose Controller 7 (Button, MIDI Controller 82)
437                    _lev_ctrl_genpurpose8       = 0x23, ///< General Purpose Controller 8 (Button, MIDI Controller 83)
438                    _lev_ctrl_effect1depth      = 0x25, ///< Effect 1 Depth (MIDI Controller 91)
439                    _lev_ctrl_effect2depth      = 0x27, ///< Effect 2 Depth (MIDI Controller 92)
440                    _lev_ctrl_effect3depth      = 0x29, ///< Effect 3 Depth (MIDI Controller 93)
441                    _lev_ctrl_effect4depth      = 0x2b, ///< Effect 4 Depth (MIDI Controller 94)
442                    _lev_ctrl_effect5depth      = 0x2d, ///< Effect 5 Depth (MIDI Controller 95)
443                    _lev_ctrl_channelaftertouch = 0x2f, ///< Channel Key Pressure
444                    _lev_ctrl_velocity          = 0xff  ///< Key Velocity
445                } _lev_ctrl_t;
446                typedef std::map<uint32_t, double*> VelocityTableMap;
447    
448                static uint              Instances;                  ///< Number of DimensionRegion instances.
449                static VelocityTableMap* pVelocityTables;            ///< Contains the tables corresponding to the various velocity parameters (VelocityResponseCurve and VelocityResponseDepth).
450                double*                  pVelocityAttenuationTable;  ///< Points to the velocity table corresponding to the velocity parameters of this DimensionRegion.
451    
452                leverage_ctrl_t DecodeLeverageController(_lev_ctrl_t EncodedController);
453      };      };
454    
455      /** Encapsulates sample waves used for playback. */      /** Encapsulates sample waves used for playback. */
# Line 397  namespace gig { Line 460  namespace gig {
460              uint32_t       Product;           ///< Specifies the MIDI model ID defined by the manufacturer corresponding to the Manufacturer field. If no particular manufacturer's product is to be specified, a value of 0 should be used.              uint32_t       Product;           ///< Specifies the MIDI model ID defined by the manufacturer corresponding to the Manufacturer field. If no particular manufacturer's product is to be specified, a value of 0 should be used.
461              uint32_t       SamplePeriod;      ///< Specifies the duration of time that passes during the playback of one sample in nanoseconds (normally equal to 1 / Samplers Per Second, where Samples Per Second is the value found in the format chunk).              uint32_t       SamplePeriod;      ///< Specifies the duration of time that passes during the playback of one sample in nanoseconds (normally equal to 1 / Samplers Per Second, where Samples Per Second is the value found in the format chunk).
462              uint32_t       MIDIUnityNote;     ///< Specifies the musical note at which the sample will be played at it's original sample rate.              uint32_t       MIDIUnityNote;     ///< Specifies the musical note at which the sample will be played at it's original sample rate.
463              uint32_t       MIDIPitchFraction; ///< Specifies the fraction of a semitone up from the specified MIDI unity note field. A value of 0x80000000 means 1/2 semitone (50 cents) and a value of 0x00000000 means no fine tuning between semitones.              uint32_t       FineTune;          ///< Specifies the fraction of a semitone up from the specified MIDI unity note field. A value of 0x80000000 means 1/2 semitone (50 cents) and a value of 0x00000000 means no fine tuning between semitones.
464              smpte_format_t SMPTEFormat;       ///< Specifies the Society of Motion Pictures and Television E time format used in the following <i>SMPTEOffset</i> field. If a value of 0 is set, <i>SMPTEOffset</i> should also be set to 0.              smpte_format_t SMPTEFormat;       ///< Specifies the Society of Motion Pictures and Television E time format used in the following <i>SMPTEOffset</i> field. If a value of 0 is set, <i>SMPTEOffset</i> should also be set to 0.
465              uint32_t       SMPTEOffset;       ///< The SMPTE Offset value specifies the time offset to be used for the synchronization / calibration to the first sample in the waveform. This value uses a format of 0xhhmmssff where hh is a signed value that specifies the number of hours (-23 to 23), mm is an unsigned value that specifies the number of minutes (0 to 59), ss is an unsigned value that specifies the number of seconds (0 to 59) and ff is an unsigned value that specifies the number of frames (0 to -1).              uint32_t       SMPTEOffset;       ///< The SMPTE Offset value specifies the time offset to be used for the synchronization / calibration to the first sample in the waveform. This value uses a format of 0xhhmmssff where hh is a signed value that specifies the number of hours (-23 to 23), mm is an unsigned value that specifies the number of minutes (0 to 59), ss is an unsigned value that specifies the number of seconds (0 to 59) and ff is an unsigned value that specifies the number of frames (0 to -1).
466              uint32_t       Loops;             ///< Number of defined sample loops (so far only seen single loops in gig files - please report me if you encounter more!).              uint32_t       Loops;             ///< Number of defined sample loops (so far only seen single loops in gig files - please report me if you encounter more!).
467              uint32_t       LoopID;            ///< Specifies the unique ID that corresponds to one of the defined cue points in the cue point list (only if Loops > 0).              uint32_t       LoopID;            ///< Specifies the unique ID that corresponds to one of the defined cue points in the cue point list (only if Loops > 0), as the Gigasampler format only allows one loop definition at the moment, this attribute isn't really useful for anything.
468              loop_type_t    LoopType;          ///< The type field defines how the waveform samples will be looped (only if Loops > 0).              loop_type_t    LoopType;          ///< The type field defines how the waveform samples will be looped (only if Loops > 0).
469              uint32_t       LoopStart;         ///< The start value specifies the byte offset into the waveform data of the first sample to be played in the loop (only if Loops > 0).              uint32_t       LoopStart;         ///< The start value specifies the offset (in sample points) in the waveform data of the first sample to be played in the loop (only if Loops > 0).
470              uint32_t       LoopEnd;           ///< The end value specifies the byte offset into the waveform data of the last sample to be played in the loop (only if Loops > 0).              uint32_t       LoopEnd;           ///< The end value specifies the offset (in sample points) in the waveform data which represents the end of the loop (only if Loops > 0).
471                uint32_t       LoopSize;          ///< Length of the looping area (in sample points) which is equivalent to <i>LoopEnd - LoopStart</i>.
472              uint32_t       LoopFraction;      ///< The fractional value specifies a fraction of a sample at which to loop (only if Loops > 0). This allows a loop to be fine tuned at a resolution greater than one sample. A value of 0 means no fraction, a value of 0x80000000 means 1/2 of a sample length. 0xFFFFFFFF is the smallest fraction of a sample that can be represented.              uint32_t       LoopFraction;      ///< The fractional value specifies a fraction of a sample at which to loop (only if Loops > 0). This allows a loop to be fine tuned at a resolution greater than one sample. A value of 0 means no fraction, a value of 0x80000000 means 1/2 of a sample length. 0xFFFFFFFF is the smallest fraction of a sample that can be represented.
473              uint32_t       LoopPlayCount;     ///< Number of times the loop should be played (only if Loops > 0, a value of 0 = infinite).              uint32_t       LoopPlayCount;     ///< Number of times the loop should be played (only if Loops > 0, a value of 0 = infinite).
474              bool           Compressed;        ///< If the sample wave is compressed (probably just interesting for instrument and sample editors, as this library already handles the decompression in it's sample access methods anyway).              bool           Compressed;        ///< If the sample wave is compressed (probably just interesting for instrument and sample editors, as this library already handles the decompression in it's sample access methods anyway).
# Line 420  namespace gig { Line 484  namespace gig {
484              unsigned long SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence = RIFF::stream_start);              unsigned long SetPos(unsigned long SampleCount, RIFF::stream_whence_t Whence = RIFF::stream_start);
485              unsigned long GetPos();              unsigned long GetPos();
486              unsigned long Read(void* pBuffer, unsigned long SampleCount);              unsigned long Read(void* pBuffer, unsigned long SampleCount);
487                unsigned long ReadAndLoop(void* pBuffer, unsigned long SampleCount, playback_state_t* pPlaybackState);
488          protected:          protected:
489              static unsigned int  Instances;               ///< Number of instances of class Sample.              static unsigned int  Instances;               ///< Number of instances of class Sample.
490              static unsigned long DecompressionBufferSize; ///< Current size of the decompression buffer.              static unsigned long DecompressionBufferSize; ///< Current size of the decompression buffer.
# Line 431  namespace gig { Line 496  namespace gig {
496    
497              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset);              Sample(File* pFile, RIFF::List* waveList, unsigned long WavePoolOffset);
498             ~Sample();             ~Sample();
499                /**
500                 * Swaps the order of the data words in the given memory area
501                 * with a granularity given by \a WordSize.
502                 *
503                 * @param pData    - pointer to the memory area to be swapped
504                 * @param AreaSize - size of the memory area to be swapped (in bytes)
505                 * @param WordSize - size of the data words (in bytes)
506                 */
507                inline void SwapMemoryArea(void* pData, unsigned long AreaSize, uint WordSize) {
508                    switch (WordSize) { // TODO: unefficient
509                        case 1: {
510                            uint8_t* pDst = (uint8_t*) pData;
511                            uint8_t  cache;
512                            unsigned long lo = 0, hi = AreaSize - 1;
513                            for (; lo < hi; hi--, lo++) {
514                                cache    = pDst[lo];
515                                pDst[lo] = pDst[hi];
516                                pDst[hi] = cache;
517                            }
518                            break;
519                        }
520                        case 2: {
521                            uint16_t* pDst = (uint16_t*) pData;
522                            uint16_t  cache;
523                            unsigned long lo = 0, hi = (AreaSize >> 1) - 1;
524                            for (; lo < hi; hi--, lo++) {
525                                cache    = pDst[lo];
526                                pDst[lo] = pDst[hi];
527                                pDst[hi] = cache;
528                            }
529                            break;
530                        }
531                        case 4: {
532                            uint32_t* pDst = (uint32_t*) pData;
533                            uint32_t  cache;
534                            unsigned long lo = 0, hi = (AreaSize >> 2) - 1;
535                            for (; lo < hi; hi--, lo++) {
536                                cache    = pDst[lo];
537                                pDst[lo] = pDst[hi];
538                                pDst[hi] = cache;
539                            }
540                            break;
541                        }
542                        default: {
543                            uint8_t* pCache = new uint8_t[WordSize]; // TODO: unefficient
544                            unsigned long lo = 0, hi = AreaSize - WordSize;
545                            for (; lo < hi; hi -= WordSize, lo += WordSize) {
546                                memcpy(pCache, (uint8_t*) pData + lo, WordSize);
547                                memcpy((uint8_t*) pData + lo, (uint8_t*) pData + hi, WordSize);
548                                memcpy((uint8_t*) pData + hi, pCache, WordSize);
549                            }
550                            delete[] pCache;
551                            break;
552                        }
553                    }
554                }
555                inline long Min(long A, long B) {
556                    return (A > B) ? B : A;
557                }
558                inline long Abs(long val) { return (val > 0) ? val : -val; }
559          private:          private:
560              void ScanCompressedSample();              void ScanCompressedSample();
561              friend class File;              friend class File;
# Line 517  namespace gig { Line 642  namespace gig {
642              Sample*     GetNextSample();      ///< Returns a pointer to the next <i>Sample</i> object of the file, <i>NULL</i> otherwise.              Sample*     GetNextSample();      ///< Returns a pointer to the next <i>Sample</i> object of the file, <i>NULL</i> otherwise.
643              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.
644              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.
645                Instrument* GetInstrument(uint index);
646             ~File() {};             ~File() {};
647          protected:          protected:
648              typedef std::list<Sample*>     SampleList;              typedef std::list<Sample*>     SampleList;
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