/[svn]/libgig/trunk/src/gig.h
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revision 2 by schoenebeck, Sat Oct 25 20:15:04 2003 UTC revision 21 by schoenebeck, Thu Dec 25 01:09:08 2003 UTC
# Line 36  Line 36 
36  /// reallocated which is time consuming and unefficient.  /// reallocated which is time consuming and unefficient.
37  #define INITIAL_SAMPLE_BUFFER_SIZE              512000 // 512 kB  #define INITIAL_SAMPLE_BUFFER_SIZE              512000 // 512 kB
38    
39  #if 0 //WORDS_BIGENDIAN  #if WORDS_BIGENDIAN
40  # define LIST_TYPE_3PRG 0x33707267  # define LIST_TYPE_3PRG 0x33707267
41  # define LIST_TYPE_3EWL 0x3365776C  # define LIST_TYPE_3EWL 0x3365776C
42  # define CHUNK_ID_SMPL  0x736D706C  # define CHUNK_ID_SMPL  0x736D706C
# 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)                       (powl(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 362  namespace gig { Line 366  namespace gig {
366              // Key Velocity Transformations              // Key Velocity Transformations
367              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.
368              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4).              uint8_t            VelocityResponseDepth;         ///< Dynamic range of velocity affecting amplitude (0 - 4).
369              uint8_t            VelocityResponseCurveScaling;              uint8_t            VelocityResponseCurveScaling;  ///< 0 - 127
370              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.
371              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).
372              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8              uint8_t            ReleaseTriggerDecay;           ///< 0 - 8
# Line 386  namespace gig { Line 390  namespace gig {
390              DLS::Sampler::SampleLoops;              DLS::Sampler::SampleLoops;
391              DLS::Sampler::pSampleLoops;              DLS::Sampler::pSampleLoops;
392    
393                // Methods
394                double GetVelocityAttenuation(uint8_t MIDIKeyVelocity);
395            protected:
396              DimensionRegion(RIFF::List* _3ewl);              DimensionRegion(RIFF::List* _3ewl);
397               ~DimensionRegion();
398                friend class Region;
399            private:
400                typedef std::map<uint32_t, double*> VelocityTableMap;
401    
402                static uint              Instances;                  ///< Number of DimensionRegion instances.
403                static VelocityTableMap* pVelocityTables;            ///< Contains the tables corresponding to the various velocity parameters (VelocityResponseCurve and VelocityResponseDepth).
404                double*                  pVelocityAttenuationTable;  ///< Points to the velocity table corresponding to the velocity parameters of this DimensionRegion.
405      };      };
406    
407      /** Encapsulates sample waves used for playback. */      /** Encapsulates sample waves used for playback. */
# Line 397  namespace gig { Line 412  namespace gig {
412              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.
413              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).
414              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.
415              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.
416              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.
417              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).
418              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!).
419              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.
420              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).
421              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).
422              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).
423                uint32_t       LoopSize;          ///< Length of the looping area (in sample points) which is equivalent to <i>LoopEnd - LoopStart</i>.
424              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.
425              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).
426              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 517  namespace gig { Line 533  namespace gig {
533              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.
534              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.
535              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.
536                Instrument* GetInstrument(uint index);
537             ~File() {};             ~File() {};
538          protected:          protected:
539              typedef std::list<Sample*>     SampleList;              typedef std::list<Sample*>     SampleList;
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