3 Converted the library codebase to C++11. A lot of hacks and custom
4 structures have been replaced with standard or cleaner implementations.
6 Partially implemented the Vocal Morpher effect.
8 Fixed the bsinc SSE resampler on non-GCC compilers.
12 Fixed support for extended capture formats with OpenSL.
14 Fixed handling of WASAPI not reporting a default device.
16 Fixed performance problems relating to semaphores on macOS.
18 Modified alcResetDeviceSOFT to attempt recovery of lost devices.
20 Modified the virtual speaker layout for HRTF B-Format decoding.
22 Modified the PulseAudio backend to use a custom processing loop.
24 Renamed the makehrtf utility to makemhr.
26 Improved the efficiency of the HRTF mixers.
28 Improved the HRTF B-Format decoder coefficient generation.
30 Improved reverb fading to be more consistent with pan fading.
32 Improved handling of sources that end prematurely, to avoid loud clicks.
34 Improved some reverb processing loops.
36 Added support for SOFA input files with makemhr.
38 Added a build option to use pre-built native tools. For cross-compiling,
39 use with caution and ensure the native tools' binaries are kept up-to-date.
41 Added an adjust-latency config option for the PulseAudio backend.
43 Added basic support for multi-field HRTFs.
45 Added an option for mixing first-, second-, or third-order B-Format with
46 HRTF output. This can improve HRTF performance given a number of sources.
48 Added an RC file for proper DLL version information.
50 Disabled some old KDE workarounds by default. Specifically, PulseAudio
51 streams can now be moved (KDE may try to move them after opening).
55 Implemented capture support for the SoundIO backend.
57 Fixed source buffer queues potentially not playing properly when a queue
60 Fixed possible unexpected failures when generating auxiliary effect slots.
62 Fixed a crash with certain reverb or device settings.
66 Improved output limiter response, better ensuring the sample amplitude is
71 Implemented the ALC_SOFT_device_clock extension.
73 Implemented the Pitch Shifter, Frequency Shifter, and Autowah effects.
75 Fixed compiling on FreeBSD systems that use freebsd-lib 9.1.
77 Fixed compiling on NetBSD.
79 Fixed the reverb effect's density scale and panning parameters.
81 Fixed use of the WASAPI backend with certain games, which caused odd COM
82 initialization errors.
84 Increased the number of virtual channels for decoding Ambisonics to HRTF
87 Changed 32-bit x86 builds to use SSE2 math by default for performance.
88 Build-time options are available to use just SSE1 or x87 instead.
90 Replaced the 4-point Sinc resampler with a more efficient cubic resampler.
92 Renamed the MMDevAPI backend to WASAPI.
94 Added support for 24-bit, dual-ear HRTF data sets. The built-in data set
95 has been updated to 24-bit.
97 Added a 24- to 48-point band-limited Sinc resampler.
99 Added an SDL2 playback backend. Disabled by default to avoid a dependency
102 Improved the performance and quality of the Chorus and Flanger effects.
104 Improved the efficiency of the band-limited Sinc resampler.
106 Improved the Sinc resampler's transition band to avoid over-attenuating
109 Improved the performance of some filter operations.
111 Improved the efficiency of object ID lookups.
113 Improved the efficienty of internal voice/source synchronization.
115 Improved AL call error logging with contextualized messages.
117 Removed the reverb effect's modulation stage. Due to the lack of reference
118 for its intended behavior and strength.
122 Fixed resetting the FPU rounding mode after certain function calls on
125 Fixed use of SSE intrinsics when building with Clang on Windows.
127 Fixed a crash with the JACK backend when using JACK1.
129 Fixed use of pthread_setnane_np on NetBSD.
131 Fixed building on FreeBSD with an older freebsd-lib.
133 OSS now links with libossaudio if found at build time (for NetBSD).
137 Fixed an issue where resuming a source might not restart playing it.
139 Fixed PulseAudio playback when the configured stream length is much less
140 than the requested length.
142 Fixed MMDevAPI capture with sample rates not matching the backing device.
144 Fixed int32 output for the Wave Writer.
146 Fixed enumeration of OSS devices that are missing device files.
148 Added correct retrieval of the executable's path on FreeBSD.
150 Added a config option to specify the dithering depth.
152 Added a 5.1 decoder preset that excludes front-center output.
156 Implemented the AL_EXT_STEREO_ANGLES and AL_EXT_SOURCE_RADIUS extensions.
158 Implemented the AL_SOFT_gain_clamp_ex, AL_SOFT_source_resampler,
159 AL_SOFT_source_spatialize, and ALC_SOFT_output_limiter extensions.
161 Implemented 3D processing for some effects. Currently implemented for
162 Reverb, Compressor, Equalizer, and Ring Modulator.
164 Implemented 2-channel UHJ output encoding. This needs to be enabled with a
165 config option to be used.
167 Implemented dual-band processing for high-quality ambisonic decoding.
169 Implemented distance-compensation for surround sound output.
171 Implemented near-field emulation and compensation with ambisonic rendering.
172 Currently only applies when using the high-quality ambisonic decoder or
173 ambisonic output, with appropriate config options.
175 Implemented an output limiter to reduce the amount of distortion from
178 Implemented dithering for 8-bit and 16-bit output.
180 Implemented a config option to select a preferred HRTF.
182 Implemented a run-time check for NEON extensions using /proc/cpuinfo.
184 Implemented experimental capture support for the OpenSL backend.
186 Fixed building on compilers with NEON support but don't default to having
189 Fixed support for JACK on Windows.
191 Fixed starting a source while alcSuspendContext is in effect.
193 Fixed detection of headsets as headphones, with MMDevAPI.
195 Added support for AmbDec config files, for custom ambisonic decoder
196 configurations. Version 3 files only.
198 Added backend-specific options to alsoft-config.
200 Added first-, second-, and third-order ambisonic output formats. Currently
201 only works with backends that don't rely on channel labels, like JACK,
204 Added a build option to embed the default HRTFs into the lib.
206 Added AmbDec presets to enable high-quality ambisonic decoding.
208 Added an AmbDec preset for 3D7.1 speaker setups.
210 Added documentation regarding Ambisonics, 3D7.1, AmbDec config files, and
211 the provided ambdec presets.
213 Added the ability for MMDevAPI to open devices given a Device ID or GUID
216 Added an option to the example apps to open a specific device.
218 Increased the maximum auxiliary send limit to 16 (up from 4). Requires
219 requesting them with the ALC_MAX_AUXILIARY_SENDS context creation
222 Increased the default auxiliary effect slot count to 64 (up from 4).
224 Reduced the default period count to 3 (down from 4).
226 Slightly improved automatic naming for enumerated HRTFs.
228 Improved B-Format decoding with HRTF output.
230 Improved internal property handling for better batching behavior.
232 Improved performance of certain filter uses.
234 Removed support for the AL_SOFT_buffer_samples and AL_SOFT_buffer_sub_data
235 extensions. Due to conflicts with AL_EXT_SOURCE_RADIUS.
239 Implemented device enumeration for OSSv4.
241 Fixed building on OSX.
243 Fixed building on non-Windows systems without POSIX-2008.
245 Fixed Dedicated Dialog and Dedicated LFE effect output.
247 Added a build option to override the share install dir.
249 Added a build option to static-link libgcc for MinGW.
253 Fixed building with JACK and without PulseAudio.
255 Fixed building on FreeBSD.
257 Fixed the ALSA backend's allow-resampler option.
259 Fixed handling of inexact ALSA period counts.
261 Altered device naming scheme on Windows backends to better match other
264 Updated the CoreAudio backend to use the AudioComponent API. This clears up
265 deprecation warnings for OSX 10.11, although requires OSX 10.6 or newer.
269 Implemented a JACK playback backend.
271 Implemented the AL_EXT_BFORMAT and AL_EXT_MULAW_BFORMAT extensions.
273 Implemented the ALC_SOFT_HRTF extension.
275 Implemented C, SSE3, and SSE4.1 based 4- and 8-point Sinc resamplers.
277 Implemented a C and SSE based band-limited Sinc resampler. This does 12- to
278 24-point Sinc resampling, and performs anti-aliasing.
280 Implemented B-Format output support for the wave file writer. This creates
281 FuMa-style first-order Ambisonics wave files (AMB format).
283 Implemented a stereo-mode config option for treating stereo modes as either
284 speakers or headphones.
286 Implemented per-device configuration options.
288 Fixed handling of PulseAudio and MMDevAPI devices that have identical
291 Fixed a potential lockup when stopping playback of suspended PulseAudio devices.
293 Fixed logging of Unicode characters on Windows.
295 Fixed 5.1 surround sound channels. By default it will now use the side
296 channels for the surround output. A configuration using rear channels is
299 Fixed the QSA backend potentially altering the capture format.
301 Fixed detecting MMDevAPI's default device.
303 Fixed returning the default capture device name.
305 Fixed mixing property calculations when deferring context updates.
307 Altered the behavior of alcSuspendContext and alcProcessContext to better
308 match certain Windows drivers.
310 Altered the panning algorithm, utilizing Ambisonics for better side and
311 back positioning cues with surround sound output.
313 Improved support for certain older Windows apps.
315 Improved the alffplay example to support surround sound streams.
317 Improved support for building as a sub-project.
319 Added an HRTF playback example.
321 Added a tone generator output test.
323 Added a toolchain to help with cross-compiling to Android.
327 Implemented EFX Chorus, Flanger, Distortion, Equalizer, and Compressor
330 Implemented high-pass and band-pass EFX filters.
332 Implemented the high-pass filter for the EAXReverb effect.
334 Implemented SSE2 and SSE4.1 linear resamplers.
336 Implemented Neon-enhanced non-HRTF mixers.
338 Implemented a QSA backend, for QNX.
340 Implemented the ALC_SOFT_pause_device, AL_SOFT_deferred_updates,
341 AL_SOFT_block_alignment, AL_SOFT_MSADPCM, and AL_SOFT_source_length
344 Fixed resetting mmdevapi backend devices.
346 Fixed clamping when converting 32-bit float samples to integer.
348 Fixed modulation range in the Modulator effect.
350 Several fixes for the OpenSL playback backend.
352 Fixed device specifier names that have Unicode characters on Windows.
354 Added support for filenames and paths with Unicode (UTF-8) characters on
357 Added support for alsoft.conf config files found in XDG Base Directory
358 Specification locations (XDG_CONFIG_DIRS and XDG_CONFIG_HOME, or their
359 defaults) on non-Windows systems.
361 Added a GUI configuration utility (requires Qt 4.8).
363 Added support for environment variable expansion in config options (not
364 keys or section names).
366 Added an example that uses SDL2 and ffmpeg.
368 Modified examples to use SDL_sound.
370 Modified CMake config option names for better sorting.
372 HRTF data sets specified in the hrtf_tables config option may now be
373 relative or absolute filenames.
375 Made the default HRTF data set an external file, and added a data set for
376 48khz playback in addition to 44.1khz.
378 Added support for C11 atomic methods.
380 Improved support for some non-GNU build systems.
384 Fixed a regression with retrieving the source's AL_GAIN property.
388 Fixed device enumeration with the OSS backend.
390 Reorganized internal mixing logic, so unneeded steps can potentially be
391 skipped for better performance.
393 Removed the lookup table for calculating the mixing pans. The panning is
394 now calculated directly for better precision.
396 Improved the panning of stereo source channels when using stereo output.
398 Improved source filter quality on send paths.
400 Added a config option to allow PulseAudio to move streams between devices.
402 The PulseAudio backend will now attempt to spawn a server by default.
404 Added a workaround for a DirectSound bug relating to float32 output.
406 Added SSE-based mixers, for HRTF and non-HRTF mixing.
408 Added support for the new AL_SOFT_source_latency extension.
410 Improved ALSA capture by avoiding an extra buffer when using sizes
411 supported by the underlying device.
413 Improved the makehrtf utility to support new options and input formats.
415 Modified the CFLAGS declared in the pkg-config file so the "AL/" portion of
416 the header includes can optionally be omitted.
418 Added a couple example code programs to show how to apply reverb, and
421 The configuration sample is now installed into the share/openal/ directory
422 instead of /etc/openal.
424 The configuration sample now gets installed by default.