CVS log for libgig/src/gig.cpp
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* preparations for release 3.1.0

* src/gig.cpp, src/gig.h: fixed behavior regarding the newly added support
  for sample groups, the initial implementation assumed a group index of 0
  in the .gig file to mean "no group assigned" and thus the possibility
  that there might not be a group at all, but in fact the .gig format
  assumes always at least one group (the default group), thus a group index
  of 0 means "member of default group"

* support for Gigasampler's sample groups added

* added DLS INFO string Subject and fixed string Media
* fixed SamplePeriod calculation

* several fixes for the write support

* real support for 24 bit samples
* support for reading of .art files

* sample loop parameters are now taken from the DimensionRegion
  instead of the wave chunk
* keyswitching dimension is changed from split type "normal" to "bit"

* added support for more than one custom velocity split inside a
  region

* fixed some memory management errors, one of them was causing a crash
  when a multi-file gig was deallocated

* recommited bugfixes regarding .gig write support
(that commit batch got lost due to the recent CVS server defect)

* src/gig.cpp, src/gig.h:
  - added write support (highly experimental)
  - removed unnecessary definitions from header file
* src/DLS.cpp:
  - try to load instruments/samples before adding a new instrument/sample

* added write support (only to the RIFF classes yet)

* support for the gig v3 feature to have a number of dimension splits
  not equal to a power of two

* fixed the GetVelocityCutoff function, it wasn't always using the
  VCFVelocityScale parameter when no cutoff controller was defined

* added VCFCutoffControllerInvert parameter and GetVelocityCutoff
  function to DimensionRegion

* fixed the 24 bit decompression, the result should now be exact
  instead of an approximation

* added support for gig v3 multi-file format

* added DimensionRegion::GetVelocityRelease function

* added functions libraryName() and libraryVersion() to each of the three
  library units (RIFF,DLS,gig)
* all tools now offer a command line switch -v to show the tools revision
  and the used libgig version
* man pages are now auto generated with the correct libgig version

* src/gig.h, src/gig.cpp: API change of progress callback

* src/gig.h, src/gig.cpp: implemented progress indicator callback mechanism
  for loading instruments and samples
* src/DLS.cpp: fixed File constructor which caused variable
  File::Instruments always to be zero
* src/RIFF.cpp: fixed method List::LoadSubChunks() which did not restore
  the original position within the body of the given list chunk

* src/gig.h, src/gig.cpp: 24-bit decompression now supports the 20 and
  18 bit formats
* src/gig.h, src/gig.cpp: added "random" and "round robin" dimensions

* src/gig.h, src/gig.cpp: added pre-calculated sample attenuation
  parameter
* src/gigdump: added output of Gain and SampleStartOffset

* gig::Sample: external decompression buffers can now be used for streaming
  with Read() and ReadAndLoop() to avoid race conditions in case of
  multiple streaming threads
* fixed some memory leaks caused by non virtual base constructors

* src/gig.cpp: Fixed mono decompression.

* src/gig.cpp, src/gig.h, src/gigextract.cpp: Support for compressed
  mono samples. Experimental support for compressed 24 bit
  samples. Fixes for decompression on big-endian CPUs. Fix for bug
  that truncated end of compressed samples.

* src/gig.cpp:
  - another memory leak fix
  - duplicated memory free fix
  - tiny fix in decompression buffer reallocation
(patch by "Gene" a.k.a Anders Alm)

* src/gig.cpp: fixed crash on patches which did not have a sample assigned
  to their region(s) or dimension region(s) (patch by Andreas Persson)

* src/gig.cpp: fixed some memory leaks (patch by Gene Anders)

* src/gig.h, src/gig.cpp: support for up to 8 dimensions as introduced by
  Gig V3 (patch by Andreas Persson)

* src/gig.cpp, src/gig.h:
  - fixed vcf_type_lowpassturbo value (vcf_type_lowpassturbo was actually
    never used, because the necessary check was made before initialization)
  - fixed crossfade points order (structure for big endian and little
    endian systems was interchanged)

* src/DLS.cpp, src/gig.cpp: experimental support for Gigasampler v3 format;
  64 bit file offsets are truncated to 32 bit, 24 bit samples are truncated
  to 16 bit and additional articulation informations are ignored at the
  moment, added some file format compatibility checks
  (patch by Andreas Persson)

* src/gig.cpp, src/gig.h: applied patch by Andreas Persson which improves
  accuracy of all three velocity response curves

* src/gig.cpp, src/gig.h: added class attribute 'Layers' to class 'Region'
* src/gigdump.cpp: replaced printout of DLS Region layer by printout of
  amount of Gigasampler layers

* src/gig.cpp: fixed panorama value in DimensionRegion (invalid conversion
  from signed 7 bit to signed 8 bit)
* src/gigdump.cpp: added printout for panorama value for each
  DimensionRegion

* bugfix for dimension region switching (wrong handling of the release
  trigger dimension, no bit range check for dimensions of split type
  'split_type_bit')

* src/gig.h, src/gig.cpp: fixed / improved accuracy of all three velocity
  to volume transformation functions (a.k.a. 'nonlinear','linear',
  'special'), denormals are filtered from the velocity to volume tables
* src/gigdump.cpp: added printout of velocity response curve parameters

updated copyright header for 2004

* src/gig.h: changed interface for 'attenuation_ctrl_t', 'eg1_ctrl_t' and
  'eg2_ctrl_t': replaced the huge enumeration by a structure which reflects
  the MIDI controller number in case of an ordinary control change
  controller (this saves a huge switch-case block in the application of the
  library customer)
* src/gig.h: renamed following attributes in class 'DimensionRegion':
 'AttenuationContol' -> 'AttenuationController',
 'InvertAttenuationControl' -> 'InvertAttenuationController',
 'AttenuationControlTreshold' -> 'AttenuationControllerThreshold'
* src/gig.cpp: minor fix in API documentation for method
  'GetVelocityAttenuation()' in class 'DimensionRegion'

* src/gig.cpp: attributes 'LoopStart', 'LoopEnd' and 'LoopSize' in class
  'Sample' reflected wrong values
* updated Make files (autoconf 2.58, automake 1.6.3)

* src/gig.cpp, src/gig.h: added ReadAndLoop() method to class 'Sample'
  which is an extension to the normal Read() method to honor the sample's
  looping information while streaming from disk
* src/RIFF.cpp: minor fix in Chunk::Read() method (only a minor efficiency
  issue)
* src/gigdump.cpp: added printout of samples' looping informations

* gig.h, gig.cpp:
  changes in class 'Sample':
  - fixed loop attributes which reflected wrong values
  - attributes 'LoopStart' and 'LoopEnd' are now measured in sample points
    instead of byte offset
  - renamed misleading attribute name 'MIDIPitchFraction' to 'FineTune'
  - added attribute 'LoopSize'
  changes in class 'File':
  - added method GetInstrument(uint index)

* src/gig.cpp, src/gig.h: added method GetVelocityAttenuation() to class
  DimensionRegion which takes the MIDI key velocity value as an argument
  and returns the appropriate volume factor (0.0-1.0) for the sample to be
  be played back, the velocity curve transformation functions used for this
  are only an approximation so far

* src/gig.cpp: fixed bug in decompression algorithm which caused it not to
  detect the end of a stream
* various endian corrections (successfully tested now on ppc)
* minor adjustments to avoid compile errors on some systems
  (using now pow() instead of powl() and --pedantic g++ compiler switch)
* src/RIFF.cpp, src/RIFF.h: added additional API documentation

Initial revision

Initial revision