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Release Notes
Just a little over 6 months after our last release, we're back with another one! While a little later than promised, this release contains a lot of awesome new features. Also, a big welcome to our 2 new committers, David Henningsson and Tanu Kaskinen (who squashed the last of the 2.0 blockers).
Key Features
- Alternate sample rates
- Jack detection
- Echo cancellation: WebRTC canceller, automatic gain control, drift compensation
- Virtual Surround module
- Xen Paravirtualised audio sink
- Fixed HURD support
- A2DP decoder quality improvements
Packaging
The webrtc echo canceller depends on a new library: webrtc-audio-processing
The adrian canceller is optional and will likely be dropped in a future release
- The Speex library is now optional (but highly recommended -- don't drop this unless you really know what you're doing)
- Xen support has been added and will be of interest while building gest images
Features in more detail
Alternate sample rates
A lot of common (desktop) hardware supports multiple sample rates. Interesting, among these, are 44100 Hz and 48000 Hz, since all common sample rates can be expressed as a simple multiple of one of these, which implies cheaper resampling, when it is required. Previous versions of PulseAudio only supported opening the device at a single sample rate, requiring all streams that did not match this rate to be resampled. We now support switching the device's sample rate dynamically at run time, allowing us to avoid resampling, or reduce resampling overhead. This should result in CPU and power savings on hardware that supports such switching (most Intel HDA-based devices at least).
Jack detection
With PulseAudio 1.0, we added infrastructure to loosely support the concept of "ports", which are meant to be mapped to actual supported audio paths (read: physical outputs like your speaker or 3.5mm jack). These needed to be dealt with manually, and thus were not too interesting to users. With PulseAudio 2.0 and a recent Linux kernel (3.3.0 or higher), we now automatically detect whether a jack is plugged in to your device or not, and act accordingly. Currently, this buys us the ability to manage volumes for different outputs separately, and future work will allow more advanced features like easing the set up of multichannel output, etc.
VOIP improvements
The echo cancellation module got significant improvements with the addition of support for a new echo canceller based on the code from the WebRTC.org project. This canceller has a much shorter learning time, and is generally of higher quality than the previous default Speex canceller (which is still available). The module also uses the WebRTC.org code to add automatic gain control (AGC) which the microphone volume automatically adjust to the input sound level, and drift compensation to allow echo cancellation between different devices (such as speakers on your laptop and the microphone on your USB webcam).
Next Steps
While this release was delayed by ~1.5 months, we are continuing to work towards a shorter release schedule of 4 months in order to get new features out early and often. There will, be intermediate point releases for major fix and regressions (but that could never happen, right? ;)).
git shortlog
Alexander E. Patrakov (1):
alsa: add DTS profile
Antti-Ville Jansson (1):
stream: Fix upload samples' cleanup
Arun Raghavan (97):
extended: Fix doxygen comment style typos
sink,source: Avoid unnecessary call to pa_rtclock_now()
alsa: Give compressed formats preference over PCM
alsa: Better error handling in mixer rtpoll callback
echo-cancel: Fail if loaded between a sink and its monitor
alsa: Make mixer error handling more robust still
echo-cancel: Add a standalone test program
echo-cancel: Remove redundant variable
echo-cancel: Don't crash if adjust_time = 0
echo-cancel: Increase threshold for resyncing, make it configurable
echo-cancel: Skip canceller when no source outputs are connected
echo-cancel: Skip processing till there's enough data
echo-cancel: Drop sink/source samples before processing begins
namereg: Don't set default sink/source on get()
echo-cancel: Close debug files on module unload
echo-cancel: Don't process if sink is unconnected
filter-apply: Move sink/source unlink callbacks before m-s-r
build-sys: Drop libsamplerate from pulsecommon deps
echo-cancel: Simplify checking if AEC is active
macro: typedef pa_bool_t to bool instead of _Bool
echo-cancel: Add the WebRTC echo canceller
build-sys: Minor CXXFLAGS fix
source: Bring rate update code in sync with sink code
sink,source: Add the ability to disable alternat sample rate switching
sink,source: Handle equal default and alternate sample rates
alsa: Remove unused variable
alsa: Probe sink/source sample rates
sink,source: Account for corked streams in update_rate()
native: Fix Solaris build
solaris: Use real_volume for set/get volume
gitignore: Update for recent additions
doc: Correct intended roles property documentation
core: Add a string list membership check function
echo-cancel: Plug in WebRTC drift compensation
echo-cancel: Adapt test code for drift compensation
doc: Fix some old 0pointer.de references
echo-cancel: Fix webrtc gain control initialisation
cli: Add a dump-volumes command
sink,source: Fix corked stream handling in update_rate()
sink-input,source-output: Add an update_rate() function
sink,source: Allow sample rate switching with corked streams
sink,source: Update sample rate if possible on stream uncork
echo-cancel: Add infrastructure for cancellers to do AGC
echo-cancel: Hook up WebRTC analog gain control
echo-cancel: Turn WebRTC analog gain control on by default
echo-cancel: Make WebRTC the default canceller
core: Make debugging a bit simpler
tests: Add playback tests to check-daemon
alsa: Minor debug code cleanup
core: Look up /etc/machine-id if D-Bus machine-id is not found
echo-cancel: Use speex by default if webrtc isn't available
echo-cancel: Use more human-friendly descriptions
filters: Fix the master source/sink when autoloaded
filters: Allow a filter to have both sink and source
proplist: Add internal API to get stream group
filters: Handle echo-cancel streams better
echo-cancel: Fix warning for undefined HAVE_WEBRTC
build-sys: Fix building without NLS
build-sys: Use absolute path for map-file while linking
mime: Move assert to correct position
iochannel: Handle missing un.h correctly
utils: Fixes for building without NLS
utils: Typo fixes in qpaeq
resampler: Remove invalid channel asserts in peak and trivial
resampler: Move some peak resampler asserts around
protocol-native: Fix 'auth-group-enabled' modarg
x11: Fix build without NLS support
build-sys: Fix map-file check
build-sys: Fix po/ build with --disable-nls
build-sys: Make esound bits optional
doc: Clarify pa_stream_get_latency() return value
daemon: Fix *-idle-time arguments
daemon: Drop --module-idle-time from docs
orc: Trivial documentation typo fix
orc: Another trivial documentation fix
alsa-mixer: Turn off the IEC958 element for analog outputs
stream: Clarify the sign of error return codes
alsa-mixer: Fix mixer path for AC3 profiles
format: Add "since 1.0" documentation tags where they were missing
loopback: Trivial whitespace fix
sink-input,source-output: Handle devices going away in unlink hooks
pacmd: Fix compiler warning
build: Fix out-of-tree build
format: Export pa_format_info int and string property getters
format: Don't assert on errors in getters
format: Expose pa_format_info<->pa_sample_spec conversion functions
format: Add more property getters
format: Update map-file
format: Trivial reorganisation
format: Add API to query a property's type
format: Allow format->sample spec conversion for compressed formats
build-sys: Bump soname
protocol-native: Reinstate assert that was incorrectly removed
protocol-native: Remove redundant asserts
stream: Fix sample spec initialisation for extended API
bluetooth: Fix crash due to usage of pa_bool_t instead of dbus_bool_t
build-sys: Bump soname
Colin Guthrie (20):
libpulse: Always return a three part version number in API calls.
build-sys: Provide a simple CMake Config setup (similar to pkgconfig)
Update LICENSE.
conf: Use .nofail when loading module-jackdbus-detect
role-cork: Rename module-cork-music-on-phone to module-role-cork.
role-cork: Make module-role-cork more generic.
role-cork: Allow module-role-cork to act globally.
pulsecore: Fix issue with circuilar definitions.
x11: Drop unneeded 'struct' and use the typedef directly.
device-port: Remove redundant include after the better circular dep fix.
i18n: Fudge translations after previous commit to avoid mixing English/localized phrases.
i18n: Do not translate strings that cannot have any sensible translations.
i18n: Run make update-po
cli: Ensure source output volumes are printed via cli interface (pacmd ls)
bluetooth: Run update-sbc
core-util: Attempt to make runtime paths smaller to avoid 108 char limit.
Revert "resamplers: Optimize trivial resampler"
man: Document the cli inteface a little.
cli: Allow source-output volumes/mute to be set via CLI
alsa: Add the DTS/DCA mapping to extra-hdmi.conf too.
Daniel Mack (2):
osx: don't build the once-test binary on OS X
osx: module_bonjour_publish needs to be linked against libprotocol-native.la
David Henningsson (46):
module-jackdbus-detect: Avoid double-free of modargs
source-output: Do not use unset channel map in pa_source_output_new
Fix deferred volume not being applied if sink is closed
Introduce "available" concept for ports, and communicate that to clients. Bump protocol version to 24.
Turn device ports into reference counted objects
Cards now has ports directly, and device port has list of profiles
Notify port available status changes, and update protocol version
cli: Show card ports and jack detection status
alsa: Ignore the virtual "thinkpad-acpi" card
alsa: add card ports and path probe cache
Fixup a few things in the new path probing
pactl: Show port availability
device-port: Add a property list to ports.
alsa-mixer: When selecting an input, turn off boosts of other inputs
alsa-mixer: Refactor pa_alsa_profile_set_probe().
alsa: Fix log message "synchronous volume" -> "deferred volume"
alsa-mixer: Allow speaker port to control "Front Speaker"
alsa: Improve "well known descriptions" for ports
alsa-mixer: Make sure unsupported paths are removed after probing
alsa-mixer: Take override-maps into account in subset elimination
sample-util: Fix "Darth Vader" panning bug
alsa-mixer: Don't use dangling pointers as port hashmap keys
PROTOCOL: Fix documentation for version 22
tunnel: fixup create_record_stream
flist: Avoid the ABA problem
alsa: Jack detection kcontrol implementation
alsa: Add port information to HDMI profiles
Add a new module switch-on-port-available that acts on port changes
conf: Load switch-on-port-available module by default
introspect: Expose port info per card to clients
alsa-mixer: Make speaker get available=no when headphones are plugged in
alsa-mixer: Don't remove paths if jacks state.(un)plugged differ
daemon: Initialize dbus to use thread-safe mode by default
protocol-native: Protect against clients trying to set a NULL port
module-loopback: Never call adjust_rates after teardown
module-switch-on-port-available: Do not switch profile if current port is available
pactl: show availability information for "list cards"
build-sys: padsp target should not be phony
alsa-mixer: Show HDMI ports for older Nvidia cards
alsa-mixer: Fix a small issue when detecting required-any
Fix input device for M-audio fasttrack pro
sink-input/source-output: Prevent filter sink/source cycles
module-loopback: Reset process_msg callbacks in teardown
alsa-sink/source: Really set volumes on port change
alsa-sink/source: Make sure volumes are synchronised after fast user switching
sink/source.h: Clarify set_port comment
Deng Zhenrong (1):
fix compilation warning via PRI prefix
Dylan Reid (1):
alsa: Set return code before printing it.
Frédéric Dalleau (9):
bluetooth: Fix Media Endpoint for HandsfreeGateway
bluetooth: Do not unload module-bluetooth-device on ERR or HUP
bluetooth: Release MediaEnpoint if card profile is set to Off
bluetooth: Set off profile on SCO disconnect
bluetooth: Set hfgw profile when HandsfreeGateway is playing
bluetooth: Use static string in DBUS signal handler description
bluetooth: Remove match for org.bluez.MediaTransport.PropertyChanged
loopback: Fix crash when moving sink-input fails
loopback: Fix crash on error during init
Giorgos Boutsioukis (1):
xen: Add Xen paravirtualized sink support.
Johan Hedberg (1):
bluetooth: sbc: Reduce for-loop induced indentation in sbc_unpack_frame
Lars R. Damerow (3):
alsa: support fixed latency range in alsa modules
alsa: fixed latency range handling for udev-detect
alsa: fixed_latency_range modarg for module-alsa-card
Lennart Poettering (1):
systemd: complement module-console-kit with module-systemd-login
Luiz Augusto von Dentz (1):
bluetooth: Fix calling many times Audio.GetProperties for the same device
Maarten Bosmans (32):
Make pulse build with clang again
doc: Add some more doxygen tags to existing comments
Do something sensible when compiled without iconv support
pacat: Fail early if the media name cannot be set
tests: Fix calculation of memblock size in resampler-test
qpaeq: Make it python3 and python2 compatible
tests: refactor ipacl-test
tests: Make sure tests assert on failure