CVS log for linuxsampler/configure.in
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* Fixed a memory leak due to EngineFactory::Destroy() not doing it
as an actual destructor and just removing the engine instance from
factory stock and all instances allocated via EngineFactory::Create()
never got delete'd and thus their destructors never called. This bug
was evident while having many mapped instruments and querying the
instrument status via GET MIDI_INSTRUMENT INFO command, eating up
system memory very quickly and never let it go.

* global volume can now be altered at runtime
  (added two new LSCP commands for this, LSCP specs updated)

* implemented MIDI instrument mapping according to latest LSCP draft

* preparations for release 0.4.0

updated dependency to latest libgig release (3.1.0)

* little configure.in fix for PPC
  (patch by Ebrahim Mayat)

updated dependency to latest libgig release (3.0.0)

* added compile time options to allow disabling the various audio and MIDI
  drivers (./configure --disable-foo-driver)

* added compile time option to disable processing of All-Notes-Off
  MIDI messages

* fixed some concurrency problems between the lscp thread and the
  audio/midi threads for these commands: load engine, set channel
  audio output device, set channel midi input device/port/channel and
  remove channel. Thanks to Vincent Bongiorno for bug reports and
  testing.
* removed an autotools warning
* fixed an iterator bug
* minor code clean-ups

* added aRts audio output driver (by no means RT safe)

* added smoothing of volume changes caused by control change messages
* fine tuning of the crossfade volume curve

* added linear interpolation of volume modulation inside a
  subfragment; this prevents clicks during voice stealing. Can be
  switched off with the --disable-interpolate-volume configure option.

* implemented portamento mode and solo mode (a.k.a 'mono mode'):
  all modes can be altered via standard GM messages, that is CC5 for
  altering portamento time, CC65 for enabling / disabling portamento
  mode, CC126 for enabling solo mode and CC127 for disabling solo mode
* fixed EG3 (pitch envelope) synthesis which was neutral all the time
* configure.in: do not automatically pick optimized gcc flags if the user
  already provided some on his own (as CXXFLAGS)

* bugfix in LSCP parser which was confused by space(s) within device
  parameters
  (e.g. "SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 0 SOMEPARAM='foo bar'")
* changed version to 0.3.3cvs

change feature.h to features.h

Add test for headerfile features.h

* fixed event handling bug which was introduced by the recent synthesis
  optimizations (events were only processed for the first active voice)
* added global volume attenuation of -9 dB (0.35f) to prevent clipping
  which can be overridden with --enable-global-attenuation

* extensive synthesis optimization: reimplementation of EGs and LFO(s),
  removed synthesis parameter prerendering and the synthesis parameter
  matrix in general, splitting each audio fragment into subfragments now
  where each subfragment uses constant synthesis parameters
  (everything's still very buggy ATM)

fixed little bug regarding LFO benchmarking

Added a variation of LFOTriangleIntMath using abs()

* Added configure option --enable-process-muted-channels
which can be used to enable the processing of muted channels

added benchmark to automatically detect the best triangle LFO
implementation (currently either an integer math solution or a
di-harmonic approximation), automatic detection can be overriden
with --enable-signed-triang-algo=x and --enable-unsigned-triang-algo=x
configure script argument though (mandatory for cross-compilation)
---
actual implementations of the new LFO solutions in LS will follow soon

* install necessary development header files for allowing 3rd party
  applications to link against liblinuxsampler
* liblinuxsampler's API documentation can be generated with 'make docs'
  (Doxygen required)

* preparation for bugfix release 0.3.3

* gcc 4.0 compilation fixes

* final preparations for bugfix release 0.3.2

* fixed 'make dist' build rule to include all necessary files

* RPM .spec script added to repository.

* hand-crafted assembly optimization code can be disabled with
  './configure --disable-asm' (definitely not recommended)

* updated autotools build files for conditional compilation of CoreMIDI
  (OS X) and MidiShare (Linux, OS X, Windows) drivers

* src/network/lscpserver.cpp: fixed segfault
  (patch by Grigor Iliev, fixes #17)
* added man page
* final preparations for the first official release (which will be 0.3.1)

* (re)implemented voice stealing algorithm "oldestvoiceonkey" and made it
  the default voice stealing algorithm
* added new LSCP command "GET SERVER INFO" which currently returns
  description and version about this sampler
* added some API documentation comments
* minor cleanup

* All compile time options are now centrally alterable as arguments to the
  ./configure script. All options are C Macros beginning with CONFIG_
  prefix and will be placed into auto generated config.h file.

require libgig 2.0.0

* [bug #9] Fixed for a LSCP command syntax convention
  consistency, regarding the enumeration of available
  sampler engines, Audio and MIDI drivers; this has
  affected the semantics of the following commands:
    GET AVAILABLE_ENGINES
    GET AVAILABLE_AUDIO_DRIVERS
    GET AVAILABLE_MIDI_DRIVERS
  which are now returning an integer count of engines
  and drivers, respectively, while the following
  new commands are now being introduced:
    LIST AVAILABLE_ENGINES
    LIST AVAILABLE_AUDIO_DRIVERS
    LIST AVAILABLE_MIDI_DRIVERS
  taking on the previous functionality, returning
  a comma separated list of names.

* LinuxSampler version bumped to 0.3.1.

* autotools build fixes for PPC architecture

* removed statically included libgig sources from the LinuxSampler code
  base - you now have to compile and install libgig separately
* added -Wreturn-type gcc switch to avoid bugs with no returns on non void
  functions in future

* removed some build warnings
* fixed a bug with hanging notes when using sustain pedal
* release samples are not triggered anymore when sustain pedal is down

* design change: using now one sampler engine instance and one disk thread
  instance for all sampler channels that are connected to the same audio
  output device (and are using the same engine type of course)
* added EngineFactory / EngineChannelFactory to remove the annoying build
  dependencies e.g. of the lscpserver to the actual sampler engine
  implementations
* bumped version to 0.3.0 (current CVS state is still quite broken,
  previous, stable CVS version was tagged as "v0_2_0" and is also available
  as source tarball)

* Added first cut of instrument database query support.

* small fix for building with old JACK versions (0.94 and earlier)

* applied patch from James Klicman which fixes some issues in configure.in

* configure.in: added check for UNIX98 compatibility, check if there's at
  least one supported MIDI input and audio output system available, added
  conditionals for ALSA and JACK
* src/drivers/audio/Makefile.am: ALSA and JACK drivers are only compiled
  respectively if they're supported by the system
* MidiInputDeviceFactory.cpp, AudioOutputDeviceFactory.cpp: little
  workaround for reported linker problem
* removed autotools generated files from CVS

src/common/Mutex.cpp only compiles on UNIX98 compatible systems

forgot to change some things which was mandatory due to the recent
directory movements ('/src/audiodriver' -> '/src/drivers/audio',
'/src/mididriver' -> '/src/drivers/midi')

* Load Instrument patch applied; this patch makes the
  LOAD INSTRUMENT command to return immediately,
  almost/always with an OK response, while spawning
  the proper instrument file loading in the background.

* New INSTRUMENT_STATUS field on GET CHANNEL INFO result
  set; the instrument status value holds the load progress
  percentage if positive, otherwise a negative value is
  evidence of a load exception error.

* VERSION is now set to 0.2.

forgot to commit with the last batch, needed as I added a new directory
'src/drivers'

* biquad filter parameters are now calculated outside the interpolate
  loop for better performance
* couple of loop unroll optimizations
* filter is now enabled by default
* cubic interpolation is now enabled by default
* reduced debug level to 1 to lower verbosity
* raised default limit for voices to 128
* raised default limit for streams to 150
* added some compiler optimization flags (-ffast-math -march -mcpu)

* src/common/Thread.cpp: method StartThread() now blocks until thread
  actually runs, mlockall() will only be applied for realtime threads
* libtoolized liblinuxsampler
* initiated automatic unit tests against the LinuxSampler codebase
  (see src/testcases): already added a couple of tests for the Thread and
  Mutex classes, you have to explicitly compile the unit tests by running
  'make testcases' (you need to have cppunit installed though) and then you
  can run the console version of the test runner by calling
  'src/testcases/linuxsamplertest'
* src/Sampler.h: added API documentation

* completely restructured source tree
* implemented multi channel support
* implemented instrument manager, which controls sharing of instruments
  between multiple sampler engines / sampler channels
* created abstract classes 'AudioOutputDevice' and 'MidiInputDevice' for
  convenient implementation of further audio output driver and MIDI input
  driver for LinuxSampler
* implemented following LSCP commands: 'SET CHANNEL MIDI INPUT TYPE',
  'LOAD ENGINE', 'GET CHANNELS', 'ADD CHANNEL', 'REMOVE CHANNEL',
  'SET CHANNEL AUDIO OUTPUT TYPE'
* temporarily removed all command line options
* LSCP server is now launched by default

* implemented parser for the LinuxSampler control protocol (LSCP) by using
  flex / bison (where src/network/lscp.l is the input file for lex / flex
  and src/network/lscp.y is the input file for yacc / bison), parser and
  scanner can be regenerated by 'make parser'
* implemented LSCP network server (only single threaded so far), LSCP
  server will be launched if LinuxSampler was started with "--server" flag,
  implemented the following LSCP commands so far: "LOAD INSTRUMENT", "GET
  CHANNEL VOICE_COUNT", "GET CHANNEL STREAM_COUNT", "GET CHANNEL
  BUFFER_FILL", "SET CHANNEL VOLUME" and "RESET CHANNEL"
* disk thread now started within the engine

* implemented bidirectional voice state transition, means voice state can
  switch arbitrary times between 'Sustained'<-->'Released' within it's life
  time, thus the release process of a voice can be cancelled
* src/eg_vca.cpp: extended envelope generator by additional states
  ('Attack_Hold', 'Decay_1' and 'Decay_2')
* applied patch from Vladimir Senkov which adds new command line parameters
  ('--jackout', '--alsaout' and '--samplerate')
* configure.in: fixed compiler warning

* Added JACK support: Audio rendering process is now callback based and
  independant of used audio output system. Interfaces to other audio output
  systems can be added by creating a class derived from abstract base class
  'AudioIO' and embedding the new class into linuxsampler.cpp.
* src/audiothread.cpp: applied patch from Vladimir Senkov which fixes
  hanging notes in conjunction with the sustain pedal

* src/audioio.cpp: added support for Alsa 1.0.0
* src/audiothread.cpp: fixed several bugs in sustain pedal handling
* src/diskthread.cpp: fixed several bugs which occured under extreme
  conditions (endless loop in audiothread, freezing the whole application,
  outage of available disk streams)
* src/voice.cpp: fixed cubic interpolation (disabled by default; you can
  enable it by setting USE_LINEAR_INTERPOLATION to 0 in src/voice.h)
* src/configure.in: added check for Alsa version

* src/gig.cpp: fixed bug in decompression algorithm which caused it not to
  detect the end of a stream and let the disk streams reload forever also
  resulting in strange sounds at the end of disk voices (concerned only
  playback of compressed gig files)
* src/audiothread.cpp: deallocation of voices when they reached the end of
  playback (thus e.g. when sustain pedal is pressed and a disk stream
  reached it's end)
* various endian corrections needed for non intel systems
* introduced debug level, you can set the debug level and thus the
  verbosity of LinuxSampler in src/global.h

* transition from plain Makefile to autotools, source files moved to src/
* configure.in: added test for x86 architecture
* src/voice.h: x86 specific asm optimization for double to int casts only
  if compiling for x86 architecture