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revision 677 by schoenebeck, Thu Jun 23 22:44:59 2005 UTC revision 1321 by schoenebeck, Tue Sep 4 01:12:49 2007 UTC
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1    Version CVS HEAD (?)
2    
3      * packaging changes:
4        - config.h is not going to be installed along with liblinuxsampler's
5          API header files anymore
6        - only the API relevant header (and source) files will be exported to
7          the Doxygen API documentation (explicitly listed in Doxyfile.in)
8        - added completely new XCode project files for Mac OSX which is now
9          capable to execute our autoconf environment, thus no need anymore
10          to maintain the compile time configuration file (osx/version.h) for
11          OSX manually (patch by Toshi Nagata)
12    
13      * general changes:
14        - replaced the old, confusing MIDI program change mechanism by a
15          flexible MIDI instrument mapper which allows to map arbitrary
16          (MIDI bank, MIDI program) pairs with arbitrary
17          (engine type, instrument file, file index) triplets which will be
18          loaded on the respective channel when such MIDI program change
19          messages arrive, beside that, each entry allows to define a life-time
20          strategy for the instrument, so the user can define whether the
21          instrument should i.e. be permanently loaded (to be able to switch
22          quickly among sounds) or i.e. loaded just on demand when the
23          respective program change arrives (to safe RAM space), as well as a
24          global volume factor for each entry, so the user can adjust the volume
25          dynamic of his mapped instrument collection without having to modify
26          the instrument files, also one can manage arbitrary amount of such
27          MIDI instrument maps and assign each sampler channel individually
28          a certain map, so that i.e. separation of normal instruments and
29          drumkits is possible
30        - new notification events for tracking changes to audio/MIDI devices,
31          MIDI instrument maps, MIDI instruments, FX sends, global volume.
32        - sampler was limited to load max. 200 instruments in the background
33          due to a constant size RingBuffer FIFO which is now replaced by a
34          dynamic (unlimited) size std::list FIFO
35        - added FX sends, these allow to route audio signals to arbitrary audio
36          output channels for being processed by external effect processors
37          (i.e. jack-rack), the send levels are controllable via arbitrary MIDI
38          controllers
39        - global (sampler wide) volume can now be controlled at runtime
40        - Implemented new, improved notification system
41        - fixed compilation errors regarding OSX
42          (patch by Toshi Nagata)
43        - implemented instruments database
44        - added highly experimental support for on-the-fly instrument editing
45          within the sampler's process (by using instrument editor plugins),
46          you'll notice the new "Registered instrument editors:" message on
47          startup, added a new LSCP command "EDIT INSTRUMENT <sampler-channel>"
48          to spawn a matching instrument editor for the instrument on the
49          given sampler channel, the plugin path can be overridden at compile
50          time with ./configure --enable-plugin-dir=/some/dir
51        - added experimental code for synchronizing instrument editors hosted
52          in the sampler's process to safely edit instruments while playing
53          without a crash (hopefully) by either suspending single regions
54          wherever possible or if unavoidable whole engine(s)
55        - fixed several issues in fundamental "Thread" class: set scheduling
56          policy and priority on thread level, set a minimum stack size for
57          thread (TODO: a reasonable value yet to be tested), bugfix: non-RT
58          threads simply inherited properties of starting thread instead of
59          setting their own policy and priority
60        - minor fix in our automatic stack trace mechanism on crashes, the
61          main process did not wait for the stack trace process to finish
62          its output
63        - fixed some minor memory leaks
64        - reenabled assembly features support, at the moment only for
65          enabling a fast denormal FPU mode (x86 platforms supporting SSE2)
66        - minor assembly fix in x86 features detection (don't use the PIC
67          register, to avoid relocations in the text segment at runtime)
68    
69      * MIDI driver:
70        - dispatch bank select (MSB and LSB) messages
71    
72      * audio driver:
73        - the ALSA audio output driver parameters now reflect the correct
74          parameter value ranges for the respective selected sound card
75          (patch by Till Wimmer, a bit fixed and extended)
76    
77      * Gigasampler format engine:
78        - if a filter is used and EG2 finishes before EG1, let the voice
79          die when EG2 has finished (this fixes a problem with clicks and
80          voice starvation for some gigs)
81        - playback is no longer disabled during instrument loading
82        - all notes playing on a channel that changes its instrument keep
83          playing with the old instrument until they get a note off
84          command
85        - EG fix: a release value of zero could cause noises or crash
86        - handle MIDI coarse tuning messages (MIDI RPN #0 MSB #2 LSB)
87        - EG fine tuning: when attack is zero the EG starts at a level
88          above max sustain level, which means that there is a decay phase
89          even if sustain is 100%
90        - more EG fixes: the level could sometimes go below zero and cause
91          noises or crashes
92        - minor fix of EGDecay (patch by Toshi Nagata)
93        - fixed compiler error when --enable-override-filter-type was
94          supplied to the configure script (fixes #46)
95        - disk thread: queue sizes are now proportional to CONFIG_MAX_STREAMS
96          instead of a fix value
97    
98      * LSCP server:
99        - fixed compile time error for old Bison versions
100          (i.e. v1.28 found on MacOS 10.4, patch by Toshi Nagata)
101        - parser now supports extended ASCII character set
102          (up to ASCII code 255, i.e. includes now umlauts and accents)
103        - filename arguments in LSCP commands now allow to use escape
104          sequences, that is directly literal as one of: \', \", \\, \n, \r,
105          \f, \t, \v, or as octal ASCII code value like \132, or as hex ASCII
106          code value like \xf2) (fixes bug #24)
107        - returns verbose syntax errors (line and column where syntax error
108          occured, the unexpected character and the actually expected, possible
109          character(s), the latter only if less than 5 possibilities)
110    
111      * Bug fixes:
112        - fixed crash occurring on certain LSCP scripts (Bug 39)
113        - another thread safety fix for lscp "load engine" and "set
114          channel audio output device"
115        - fixed a crash which occurs when reassigning the same engine
116          on a sampler channel with connected MIDI device
117        - fixed a crash which occurs when changing the number of ports of a MIDI
118          device connected to a sampler channel to number less then or equal
119          to the index of the port to which the sampler channel is connected.
120        - The previous bindings were not been disconnected when altering
121          the ALSA_SEQ_BINDINGS parameter. Introduced a NONE keyword for
122          unsubscribing from all bindings (e.g. ALSA_SEQ_BINDINGS=NONE).
123        - The active stream/voice count statistic was incorrect.
124        - notification events were not been sent for some sampler
125          channel changes
126        - added default min and max values to restrict the number of allowed
127          audio output channels and MIDI input ports
128        - the connection to the PCM interface is now closed when destroying
129          an audio output device
130    
131      * test cases:
132        - updated and fixed (haven't been touched in a while)
133    
134    Version 0.4.0 (24 November 2006)
135    
136      * packaging changes:
137        - changed deprecated copyright attribute to license; added ldconfig
138          to post-(un)install steps; added devel package for liblinuxsampler;
139          to linuxsampler.spec (RPM)
140        - install necessary development header files for allowing 3rd party
141          applications to link against liblinuxsampler
142        - liblinuxsampler's API documentation can be generated with 'make docs'
143          (Doxygen required)
144        - added benchmark to automatically detect the best triangle LFO
145          implementation (currently either an integer math solution or a
146          di-harmonic approximation), automatic detection can be overriden
147          with --enable-signed-triang-algo=x and --enable-unsigned-triang-algo=x
148          configure script argument though (mandatory for cross-compilation)
149        - do not automatically pick optimized gcc flags if the user already
150          provided some on his own (as CXXFLAGS)
151        - added compile time option to disable processing of All-Notes-Off MIDI
152          messages
153        - added compile time options to allow disabling the various audio and
154          MIDI drivers
155        - fixed automatic GCC CPU switch detection on PPC
156          (patch by Ebrahim Mayat)
157    
158      * Gigasampler format engine:
159        - extensive synthesis optimization
160          (reimplementation of EGs and LFO(s), removed synthesis parameter
161          prerendering and the synthesis parameter matrix in general, splitting
162          each audio fragment into subfragments now where each subfragment uses
163          constant pitch and filter coefficients. The volume coefficient is
164          linearly interpolated inside a subfragment, unless
165          --disable-interpolate-volume is set.)
166        - fine tuning of the EG modulation parameters
167        - improved filter cutoff calculation by adding support for the
168          following gig parameters: Cutoff freq (used when no cutoff
169          controller is defined), Control invert, Minimum cutoff, Velocity
170          curve and Velocity range. The keyboard tracking now scales
171          cutoff frequency instead of resonance.
172        - added support for gig parameter Resonance.
173        - fixed bug in sysex handling (patch by Juan Linietsky)
174        - added global volume attenuation of -9 dB (0.35f) to prevent clipping
175          which can be overridden with --enable-global-attenuation
176        - EG fixes: made the length of "attack hold" stage more
177          accurate. Release stage can now start before attack stage
178          ends. Cancel release didn't work when sustain was zero. Attack
179          time now has a minimal value to prevent clicks.
180        - fixed pitch changes larger than one octave
181        - fixed EG3 (pitch envelope) synthesis which was neutral all the time
182        - implemented portamento mode and solo mode (a.k.a 'mono mode'):
183          all modes can be altered via standard GM messages, that is CC5 for
184          altering portamento time, CC65 for enabling / disabling portamento
185          mode, CC126 for enabling solo mode and CC127 for disabling solo mode
186        - fine tuning of the curves for volume (CC7), pan (CC10 and gig
187          parameter) and crossfade
188        - added support for the "attenuation controller threshold" gig
189          parameter
190        - added smoothing of volume changes caused by control change
191          messages
192        - sample loop parameters are now taken from the DimensionRegion
193          instead of the wave chunk
194        - fixed keyswitching for v3 gigs with a number of keyswitch splits
195          not equal to a power of two
196        - reimplementation of the filter algorithm. The new filter is more
197          accurate and supports all gig filter types, including bandreject
198          and lowpass turbo.
199        - real support for 24 bit samples - samples are not truncated to
200          16 bits anymore
201        - support for aftertouch (channel pressure, not polyphonic
202          aftertouch)
203        - LFO1 behaviour fixed (dampening from max volume instead of
204          amplifying from 0)
205    
206      * LSCP server:
207        - fixed application exit on broken pipe error (fixes bug #20)
208        - fixed the notification messages delay due to lack of
209          network activity (fixes bug #26)
210        - fixed parser bug which occured on space(s) within device parameters
211          (e.g. "SET AUDIO_OUTPUT_CHANNEL_PARAMETER 0 0 SOMEPARAM='foo bar'")
212    
213      * audio driver:
214        - added aRts audio output driver (by no means RT safe)
215    
216      * MIDI driver:
217        - fixed legacy sysex code which caused dispatching of MIDI SysEx
218          messages several times instead of once
219        - API extension for MIDI drivers which already supply exact time stamps
220          for events (i.e. for offline rendering based MIDI drivers)
221        - added checks for bad MIDI data
222    
223      * linuxsampler application:
224        - show available sampler engine types on startup
225    
226      * general changes:
227        - support for muting sampler channels and solo mode of the same, two new
228          LSCP commands ("SET CHANNEL MUTE" and "SET CHANNEL SOLO") and two new
229          fields ("MUTE" and "SOLO") for command "GET CHANNEL INFO" were
230          introduced for this, the behavior is the same like on a mixer console
231          (patch by Grigor Iliev, a bit adjusted). Also added configure option
232          --enable-process-muted-channels which can be used to enable the
233          processing of muted channels.
234        - support for sostenuto pedal
235        - support for monitoring the total number of active voices
236          (new LSCP commands: GET TOTAL_VOICE_COUNT, GET TOTAL_VOICE_COUNT_MAX,
237          SUBSCRIBE TOTAL_VOICE_COUNT, UNSUBSCRIBE TOTAL_VOICE_COUNT)
238        - fixed some memory management errors
239        - fixed some concurrency problems that could lead to crashes when
240          LSCP commands were executed
241        - fixed crash when instrument loading failed previously on the same
242          sampler channel (fixes bug #36)
243    
244    Version 0.3.3 (15 July 2005)
245    
246      * packaging changes:
247        - fixed compilation with gcc 4.0
248    
249      * Gigasampler format engine:
250        - LFO preprocessing was performed even though the respective LFO was
251          disabled by the instrument patch (minor efficiency fix)
252        - if period time of chosen audio device is too small (< MIN_RELEASE_TIME)
253          for volume ramp downs in the same fragment (needed for current voice
254          stealing implementation) then simply inform the user with a warning
255          about possible click sounds and reduce the volume ramp down
256          appropriately instead of cancelling the audio device connection
257    
258  Version 0.3.2 (24 June 2005)  Version 0.3.2 (24 June 2005)
259    
260    * packaging changes:    * packaging changes:

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