Version 4.5.0 (02 Jun 2025)

  Maintenance release with few new features and a bunch of fixes, some of them
  fixing major issues like undefined behaviour or hangups. Therefore it is
  recommended for all users to update to this version of libgig.

  Few new convenient methods have been added, namely DLS::File::CountSamples(),
  RIFF::File::totalDataChunkCount(), RIFF::File::totalListChunkCount() and
  RIFF::File::totalChunkCount().

  Progress notification (callback) mechanism has been improved in this release
  to reflect more accurately the current progress on long taking operations like
  opening or saving files. Additionally applications can now also show the
  specific detailled action (e.g. as text on a progress bar) libgig is currently
  performing to provide the user a more in-depth feedback on what's going on
  exactly, especially when saving files larger than 10 GB, which can take
  several minutes to complete. To accomplish this, applications may access the
  new struct field RIFF::progress_t::action to obtain the current action as a
  string.

  libgig's test cases have seen an overhaul in this release. The dependency to
  the cppunit library has been dropped and all tests can now simply be compiled
  and run via a simple "make check" command. That lowers the barrier for users
  and developers to check libgig for correct behaviour on their system. Test
  coverage of libgig components has also been extended in this release.

  A bunch of libgig methods have been const-ified like Exception::PrintMessage()
  and RIFF::progress_t::subdivide(), to allow them being called from const C++
  methods by applications without any const_cast<>() hacks, which would have
  otherwise caused compiler errors before.

  The command line tools coming with libgig have finally been updated to
  libgig's latest API which pacifies a bunch of compiler deprecation warnings.

Version 4.4.1 (20 Feb 2024)

  Maintenance release.

  Fixes build errors with some compilers only. No behaviour change.

Version 4.4.0 (26 Jan 2024)

  This release introduces a new command line tool 'wav2gig' which allows to
  automatically create a .gig file from a directory of .wav files. This can
  safe quite some time when creating a new and large .gig instrument from
  scratch, as this tool automatically extracts info such as root note, velocity
  and loop points either from the .wav files themselves (if possible), or from
  their file names. It comes with a bunch of options to override exact
  behaviour to whatever the naming scheme of your .wav files are for instance.
  Refer to the new 'wav2gig' man page for details.

  A long sitting API issue had been mitigated in this release: the ancient
  GetFirstFoo() and GetNextFoo() style of methods were always error prone.
  Those methods are now marked as deprecated and GetFoo(size_t index) or
  GetFooAt(size_t index) methods were added as reentrant-safe replacement.

  Another important multi-threading issue for applications based on libgig have
  been addressed on API level: the RIFF::File class now provides a new method
  SetIOPerThread(bool enable) to activate a transparent mode of separation for
  file streaming by libgig. By default this feature is off and libgig therefore
  behaves as in previous releases, which means application threads would
  concurrently change file I/O positions when accessing libgig file access
  methods simultaniously, like e.g. streaming audio data from disk or loading or
  saving any kind of other data from or to the file directly might
  unintentionally change threads' file I/O positions between each other. By
  activating this new libgig feature, libgig automatically detects individual
  threads (as callers of affected libgig methods) and separates the file I/O
  positions for each application thread automatically, as if each thread had
  opened the file separately by itself. This feature comes with a slight runtime
  overhead cost, but has the advantage that it keeps application code simple, as
  it usually just requires to add only one line of code to make a multi-threaded
  applications work as expected, while still sharing the same libgig objects and
  without duplicating data or draining RAM resources.

  The rest of changes are numerous fixes, please refer to ChangeLog for details.

Version 4.3.0 (9 May 2021)

  From this release on libgig requires at least a C++11 compliant compiler to
  build from its sources. Another new requirement is the presence of some UUID
  generating function which must be provided by the underlying OS. Previously
  the presence of an UUID generating function was optional in libgig for many
  years. Its absence in the past only meant that you were unable to load your
  own gig files (e.g. created from scratch with Gigedit by yourself) into
  Tascam's GigaStudio software, it did not mean though any restriction in
  conjunction with LinuxSampler in the past. The latter has changed in this
  release. Without UUIDs in gig files you would now also get misbehaviours
  even while staying entirely in the Linux eco space, and hence this is now a
  hard build requirement for libgig.

  Most of the changes in the gig classes in this release are about gig file
  format extensions used by recent versions of LinuxSampler. For instance you
  now have much more control over what LFO wave form shall be used (e.g. saw and
  square, whereas the original GigaStudio was alwas limited to sine only) and
  other LFO parameters like their start phase. There are also a bunch of new
  audio filter types available in conjuction with the latest LinuxSampler
  version, e.g. additional lowpass filter types with 2, 4 and 6 poles,
  additional highpass filters with 1, 2, 4 and 6 poles, a new bandpass filter
  with 2 poles and finally also a bandreject filter with 2 poles. Another gig
  format extension was added concerning NKSP instrument scripts: LinuxSampler's
  new NKSP "patch" variable type is now supported in this version of libgig.
  Please refer to the LinuxSampler website for a more detailed explanation about
  this new NKSP instrument script feature.

  And as always there are a various fixes in this release, foremost sane output
  compatibility with GigaStudio 3 was broken, so that GigaStudio version might
  not have accepted gig files changed by you with the prior version of libgig.
  This issue is now fixed in this release.

  And last but not least the Serialization framework was extended to support now
  various common C++ STL classes like std::string, std::vector, std::map and
  std::set out of the box. So no custom code is required aymore to
  serialize/deserialize such very common native C++ object types, which reduces
  code complexity for serializing/deserializing complex C++ projects a lot.

Version 4.2.0 (25 Jul 2019)

  This is a maintenance release with important fixes; especially it fixes
  issues with gig files in GigaStudio v4 format, however this release also
  introduces some few new features and additions. Most notably it is now
  possible to write large gig files splitted over extension files (.gx01,
  .gx02, ...). Previously it was only possible to read gig files with
  extension files, but libgig only supported to save large gig files as one
  single, monolithic gig file. The problem with the latter was that gig
  files >= 2 GB could only be read by libgig, but could not be loaded with
  any version of GigaStudio. So this solves that legacy support issue.
  Apart from that, a bunch of convenience methods have been added.

Version 4.1.0 (25 Nov 2017)

  This release adds support for files much larger than 2 GB for GigaStudio /
  Gigasampler (.gig), DLS, as well as for RIFF files in general. This file size
  limitation existed for a very long time due to the RIFF format's historical,
  internal 32 bit file offsets. To circumvent this file size limitation the
  concept of so called "extension files" was added in the past to the
  GigaStudio format, which means that the GigaStudio instrument editor splitted
  the respective overall instrument file into a set of files (.gig, .gx01,
  .gx02, ...), each being max. 2 GB in size, and all of them were expected to be
  located in the same directory for the sampler to load the entire large
  instrument successfully. libgig always supported only reading such gig
  extension files, however libgig never supported to create .gig files with
  extension files, nor did it support modifying existing ones. In this release
  it was necessary to finally get rid of this overall file size limitation in
  libgig. Now when that concept of extension files was introduced years ago, it
  made sense at that point, because there were still many systems out there
  which still had no support for large files (on either OS or file system
  level). However today even on low end mobile devices support for large files
  is already a broad standard. Accordingly instead of adding write support for
  extension files in libgig, the problem was addressed at its root by
  transparently using appropriate, automatic file offset sizes. So when writing
  .gig/DLS/RIFF files smaller than 2 GB there are still 32 bit file offsets
  being used by libgig. Accordingly such files are still backward compatible
  with older software. However if the overall file size to be written is 2 GB or
  larger, then 64 bit file offsets are automatically used by libgig instead.
  Note though that due to that circumstance such files >= 2 GB are not backward
  compatible with older versions of libgig, nor could they be loaded with the
  original GigaStudio software.

  Another major new feature in this libgig release is the entirely new
  serialization API (Serialization.h) which provides a powerful and easy way
  to serialize and deserialize an arbitrary set of native C++ objects into an
  abstract data stream. Which means you can simply save the entire runtime state
  of an application to a file or send it as data over "wire" (i.e. over network
  or to another process) and restore that runtime state from that data there at
  any time. In contrast to other C++ serialization frameworks out there, this
  framework provides two major benefits:

  1. This serialization framework is designed to be very robust regarding
     potential versioning changes of the native C++ classes being
     (de)serialized. So even if the C++ classes have seen massive software
     changes between the point where they were serialized and the point where
     they are to be deserialized; for example if class member variables of
     serialized C++ objects were renamed in meantime, or if variable offsets, or
     variables' data types had been changed, then the deserialization algorithm
     can still cope with such common software changes automatically in many
     cases, that is as long as the deserialization algorithm can "guess" what
     the changes were exactly. If the serialization framework is unable to
     automatically detect the precise software changes, then it will abort the
     deserialization task with an exception and an error message stating that
     the software versions are incompatible.

  2. This serialization framework supports "partial" deserialization. That
     means it not only allows to restore an entire runtime state, but it also
     allows to only restore an arbitrary desired subset of information
     from the previously serialized data stream, while leaving all other data
     of the running C++ objects untouched. The serialization framework also
     incorporates a reflection API which allows applications to implement
     convenient editors on top of such serialized data, i.e. allowing end users
     to pick or alter specific information within the serialized data.

  The new Serialization framework is already embedded into the gig classes of
  libgig, and it is used as basis for the new powerful macro features in the
  gigedit instrument editor application. Refer to the release notes of
  gigedit 1.1.0 for more information about those new macro features in gigedit.

Version 4.0.0 (14 Jul 2015)

  This major release of libgig adds support for other file formats:
  SoundFont 2 (.sf2), KORG multi sample instruments (.KSF, .KMP) and AKAI
  format sounds. The AKAI classes are a fork of Sébastien Métrot's libakai and
  since it is released under a different license (LGPL) than libgig is (GPL),
  the AKAI classes are built as separate DLL file. All other classes of those
  new file formats are built and bundled with the existing libgig DLL. Thanks
  to Grigor Iliev for his work on the SoundFont 2 classes! Please note that
  there is currently no support for KORG's .PCG file format yet. That's because
  this file format changes a lot and is not only dependent to the precise KORG
  keyboard model, but also to the precise OS version on the same model. And
  since basic conversion can also be done by just accessing the .KSF and .KMP
  files (sample data, loop informations), the current classes should be
  sufficient for many tasks. Adding support for KORG's .PCG files is not
  planned at the moment.

  Various new command line tools have been added as well to dump, extract and
  convert between all those file formats now. Each one of it has a man page,
  so please refer to the respective man page of the individual command line
  tool for details.

  The GigaStudio/Gigasampler classes received a load of fixes during the last
  six years. And support for features introduced with the last official
  GigaStudio 4 software (RIP) were added, for instance support for so called
  "iMIDI Rules". Those rules allow i.e. to trigger notes by MIDI CC and to
  define a sample set for legato playing style. In the meantime it seems as if
  the GigaStudio software has seen its last version with GigaStudio 4, because
  Tascam discontinued this product and the intellectual property of GigaStudio
  had been sold several times between companies. It is currently not possible
  to buy a new copy of GigaStudio anymore and we personally don't expect that
  this situation will ever change.

  Does this also mean the end of new features for libgig? Not really! Actually
  we already started to add new features to the GigaStudio/Gigasampler format
  which never existed with the GigaStudio/Gigasampler software: The most
  noteworthy new feature added by us is support for real-time instrument
  scripts. These are little "programs" which you can bundle with your .gig
  sounds to add a custom behavior to your sounds when playing them with i.e.
  LinuxSampler. Find out more about this new major feature on:

        http://doc.linuxsampler.org/Instrument_Scripts/

  There are also some more minor extensions to the .gig format, for example
  support for far more MIDI CC's than originally allowed by the GigaStudio
  software. Obviously all those custom extensions will not work with any
  version of the official GigaStudio software, those new features will only
  work with a recent version of LinuxSampler and gigedit at the moment.

  Besides those major changes, a load of convenient methods have been added to
  the existing libgig classes to reduce the overall effort working with all
  those file formats with software applications based on libgig.

Version 3.3.0 (30 Jul 2009)

  Partial support for MIDI rules, the rest are just bug fixes.

Version 3.2.1 (5 Dec 2007)

  Just some minor performance optimizations.

Version 3.2.0 (14 Oct 2007)

  This release once again comes with a huge bunch of fixes regarding
  Gigasampler write support. Instrument files created from scratch with
  libgig can finally be loaded into the Gigasampler application as well.

  libgig's home has moved! From now on you can find it on:
  http://www.linuxsampler.org/libgig/
  Please update your links and bookmarks!

Version 3.1.1 (24 Mar 2007)

  This is a bugfix release, fixing one important bug regarding gig v3
  support (custom split points) and a lot of bugs regarding .gig write
  support. And this is the first official release for the Windows platform.

Version 3.1.0 (24 Nov 2006)

  libgig's home has moved (slightly) from
  http://stud.fh-heilbronn.de/~cschoene/projects/libgig/ to
  http://stud.hs-heilbronn.de/~cschoene/projects/libgig/, please update your
  links and bookmarks! This is due to the recent renaming of the University
  of Heilbronn, which kindly hosts this and other projects.

Version 3.0.0 (28 Apr 2006)

  This is the first release which allows to create new and modify existing
  .gig files. Beside that it also includes another bunch of bug fixes and
  Gigasampler v3 support improvements.
