pipewire/NEWS

PipeWire 0.3.15

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Highlights
  - This is a quick update to fix critical issues with the
    0.3.14 update, which broke screen sharing and accidentally
    enabled the experimental pulse-server.
  - Fix some compatibility issues in pulse-server with
    pavucontrol and fix an issue that would block the complete
    server.

- PipeWire improvements
  - Permission checks for new clients are now done from a
    global context, which makes it possible to assign initial
    permissions to objects.
  - Handle EINTR everywhere
  - Fix an issue with the node state changes where a quick
    pause/play would hang a client.

- Session manager improvements
  - Disable the bluez5 and pulse-bridge modules by default because
    they interfere with pulseaudio. These options should only be
    enabled if pulseaudio is removed or disabled in the system.
  - Fix an issue where the session manager could end up in
    infinite recursion while scanning for things to do.
  - The session manager will now always configure nodes to remix
    to the channel configuration of the device. This fixes the case
    where mono streams would only end up on one channel of a stereo
    device.

- Device support
  - Initial merge of A2DP extra codec support using the new bluez5
    API.

- pulse-server
  - Create the runtime directory when it doesn't exist.
  - Don't ever block the server, use non-blocking IO everywhere.
  - Fill description of profiles with the name if not otherwise set,
    this fixes a crash in pavucontrol.
  - the connection debug catergory will now also debug pulse
    messages.
  - Respect the no_remix flag to make the control panel channel
    check work.

- ALSA plugin
  - implement pause


Older versions:


PipeWire 0.3.14

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Highlights
  - This release focuses on bugfixes and stability
    improvements.
  - A new experimental pulse-server module was added. This
    module implements the pulseaudio protocol on top of
    PipeWire and can be used to make flatpaks work with
    PipeWire. It looks like this might be a better way
    forward compared to the libpulse.so replacement library.
  - A2DP bluetooth was reworked. Playback should work a lot
    better now. Support was also added to automatically link
    an A2DP source to a playback device, which makes it possible
    to use PipeWire as a bluetooth receiver as well.
  - Improvements to the routing and volume restore features
    of the session manager.


- PipeWire improvements
  - The channelmixer does not normalize volumes anymore. Volumes
    are only normalized for monitoring streams now.
  - Streams can actually start in the inactive state now.
  - The channelmixer can now also convert volume updates from one
    channel layout to another. This makes saved volumes work
    even when streams have different channel layouts.
  - Clients are only registered after the properties have been
    updated.
  - Links now have a new active state.
  - Drivers can now also specify a minimum quantum. This makes it
    possible for bluetooth devices to specify an optimum quantum
    for the given codec settings and MTU.
  - The amount of data sent over the socket was reduced by only
    sending the data that changed.
  - Client objects are now exposed after they uploaded their
    properties, which makes the new object more useful.

- Tools improvements
  - pw-cat will now add metadata to the PipeWire streams.

- Session manager improvements
  - Fix crashes when reading bad data in stored settings.
  - volume and routing is improved. Settings are now remembered
    per application or media-role.
  - The session manager remembers the last device used per stream
  - Fix a bug when moving streams where it could sometimes end
    up with linking a stream to multiple devices.
  - Use RTKit to set realtime priority on the data thread in the
    session manager. This improves performance of the pulse-server
    and bluetooth devices.
  - Add a new property to mark streams that want to capture from
    the monitor of the default sink.
  - NODE_TARGET can now also contain the node name. This avoids
    some lookups in the pulseaudio layer when selecting target
    nodes by name.
  - the -e and -d options are more usable now and can be used to
    add and remove modules from the default list of modules.

- Device support
  - v4l2: add some workarounds for buggy drivers. Add Limited
    support for droidcam.
  - ACP: improve selection of default port and profiles.
  - ACP: add support for using the hardware mixer for more than
    8 channel streams.
  - ACP: support the new port type and availability group found
    in PulseAudio.
  - A2DP bluetooth timings were reworked. Automatic linking of
    A2DP sources was added to make it possible for PipeWire to
    act as a bluetooth receiver. The code was reworked to allow
    other codecs such as APTX and LDAC in the future.
  - Try harder to recover from ALSA errors.

- GStreamer improvements
  - Fix some crashes in the monitor that cause
    gnome-initial-setup to crash.

- PulseAudio layer improvements
  - Many compatibility improvements. Improved playback in
    chrome. Fix a crash in firefox when the daemon is stopped.
  - Fix a leak in the formats.
  - Fix !ADJUST_LATENCY streams like paplay.
  - Make the device option in paplay work.
  - Fix volume/mute notifications, this makes plasma volume updates
    work again.
  - Do the conversion between PulseAudio cubic volumes and PipeWire
    linear volumes. Volume levels should behave now like they did
    with PulseAudio.

- JACK layer improvements
  - Return an error when we run out of midi events. Some application
    rely on this behaviour.

- ALSA plugin improvements
  - The ALSA plugin now also supports the node name in the
    playback_node and capture_node properties.


PipeWire 0.3.13

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- PipeWire improvements
  - Add pw-reserve tool to reserve or monitor a device on DBus.
  - Install spa-resample, a tool to resample a file.
  - Install spa-acp-tool, a tool to inspect the card profile.
  - Various fixes and improvements
  - Fix a bug in pw-stream where a capture stream could run out
    of buffers and become silent.
  - Rework the processing loops in the adapter and stream. There
    is now less latency in PulseAudio and ALSA layers.

- Session manager improvements
  - Improve the device reservation code. We now try to acquire
    the device using the dbus device reservation API before we
    probe the device. This avoids conflicts with a running
    PulseAudio where devices would disappear (because they were
    locked by the other process).
  - Don't fail on invalid input from the config files.
  - Audio devices now have the same name as what PulseAudio
    would assign.

- Device support
  - v4l2: try to use the format before enumerating the size and
    framerate. Some drivers don't check the format and might now
    work better.
  - v4l2: Fall back to MMAP when EXPBUF fails. Fix MMAP access,
    just export the fd and the mapoffset. This should make more
    devices work.
  - Fix crash in ALSA Card Profile (ACP) code.
  - ACP: fix selection of default profile. Prefer any possibly
    available profile over 'Off'. This makes some card at least
    start with something.
  - Fix soft volume. After setting the volume to 0, it would stay
    at 0 until pushed over the max volume. This should fix
    various volume related issues.

- PulseAudio layer improvements
  - Rework the buffering and latency measurements and tweak the
    buffer attributes. This should make browsers and media
    players work better. This should also improve speechd
    performance.

- JACK layer improvements
  - Fix compilation against newer JACK.


PipeWire 0.3.12

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- PipeWire improvements
  * the channelmap converter now handles unknown and strange
    channellayouts much better.
  * the resampler is now cleared correctly, avoiding clicks and
    pops at the start of sound.
  * Fixes for various crasher bugs. (paplay drain, vlc shutdown,
    pactl info, ...)
  * Fix a race condition in the node state changes that caused
    all kinds of sync and other issues (vlc, mpv, ...)
  * Improve the binary name property of applications
  * Fix the scheduling again of nodes that always need a driver
    such as the jack clients.

- Session manager improvements
  * fix routing to default nodes. Sometimes nodes were not routed to
    the default node (bluetooth)

- Device support
  * disable channelmap from ALSA by default. This is what PulseAudio
    does and thus provides better compatibility.
  * fix a bug in how the resampler was used in the ALSA source,
    causing distortion and errors when using low latency capture
    clients. (Discord, webrtc, ...)
  * Small bluetooth improvements. More work is needed for reliable
    bluetooth playback.

- GStreamer plugins
  * the device provider now stops the processing loop before shutting
    down, which avoids crashes (gnome-initial-setup).

- PulseAudio layer improvements
  * the buffer attributes were reworked to ensure compatibility with
    many more applications such as mpv and audacious.
  * the pulseaudio layer will now try hard to not hand out invalid
    channel maps to the application. (avoids crashes in
    gnome-volume-control). The channel map will now also look more
    like what PulseAudio does.
  * the @DEFAULT_SINK/SOURCE/MONITOR@ wildcards now work. This
    fixes the problem with volume keys when they are bound to
    scripts using pactl and the default sink/source wildcards.
  * the PIPEWIRE_LATENCY environment variable now works again
  * Fix some leaks of ports and port info. Also fix the leak of the
    context when the mainloop is stopped.
  * The sink/source format_info array is now filled up completely,
    this is actually not implemented yet in the real PulseAudio.

- JACK layer improvements
  * jack now returns version 3.0.0 and has PipeWire in the version
    string so that apps can report this.


PipeWire 0.3.11

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- PipeWire improvements
  * Properly cleanup the mixer structures when a port is removed,
    this should fix client crashes related to port config changes
    and other random crashes.
  * Optimize the preferred formats in the audio converter. Higher
    quality formats with higher performance are chosen first.
  * Make sure the time reported by pw_stream is always increasing,
    even when the driver and clock changes.
  * There is now also a system service and socket that can be used
    to enable PipeWire systemwide. This is however not recommended
    and disabled by default.
  * Fix channelmixer 5.1 to stereo mix matrix. It was not reading
    the conversion matrix correctly and cause channels to be
    dropped. The channelmixer will now also normalize the volume,
    like what pulseaudio does.
  * The channelmixer will now just copy channels when no layout
    has been given. It has also optimized paths for this. This
    makes it possible for apps to request > 8 channels from the
    alsa plugin (ardour).
  * Port, Node and Link will now also emit an error on the
    resources in addition to updating the error in the info. This
    would make it easier to track negotiation errors in the session
    manager later.
  * many small fixes and cleanups.
  * Fix compatibility:
	+ DOSBox: fix crash because of double free in pw_stream

- Session manager improvements
  * The session manager will now try to configure the client to
    the channel configuration of the sink/source. It will only
    do this for downmixing, never for upmixing and also never
    when the client has the dont-remix property set. It will
    also renegotiate the channel layout when moving a stream to
    a new sink/source.
  * Configuration state is now saved in XDG_CONFIG_HOME.
    Previously it was saved in $HOME/.pipewire-media-session/
    You can migrate the state by moving the files to
    $XDG_CONFIG_HOME/pipewire-media-session (or
    $HOME/.config/pipewire-media-session as a fallback when
    XDG_CONFIG_HOME is not set).

- Device support
  * Bluetooth sources and sinks should work better now.
  * There is now also a new bluetooth backend using hsphfpd.
  * fix the ALSA UCM Off profile for alsa pcm devices
  * improve ALSA port and profile switching. The ACP device will
    now switch to the best port and profile when availability
    changes.

- PulseAudio layer improvements
  * Implement some more callbacks. The pulse layer will now also
    notify applications of stream moved, started and latency
    changes.
  * Fix error code when an object was not found. We now return
    PA_ERR_NOENTITY instead of PA_ERR_INVALID.
  * Add some support for loading new null sinks. Applications such
    as pulseeffects use this. Note that pulseeffects does not yet
    work reliably but can start now.
  * Improve handling of profile and port updates, it should work
    much more reliable now. Apps should now also again receive
    volume updates from sinks/sources.
  * Fix compatibility:
	+ openal-soft 1.20
	+ pavucontrol (checks PA_ERR_NOENTITY)

- JACK layer improvements
  * improve default source and sink handling. It was not updated
    correctly in all cases.
  * add samplerate and period to the pw-jack wrapper to easily
    configure the desired samplerate and perdiod for the app.

- ALSA plugin improvements
  * Add a mixer entry in the alsa config file.
  * Implement support for planar types, rework the processing
    function to make it more robust.
  * refuse to load the alsa plugin when linked against 0.2. This
    catches some old apps linked against 0.2 that want to use the
    alsa plugin.
  * Fix compatibility:
	+ linphone (ALSA SIGFPE when _status() is called
	  before _prepare()).

PipeWire 0.3.10

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Many improvements to the pulse layer.
  * GStreamer pulsesink element now works.
  * Fixes some segfaults.
  * Enable rtkit for client threads.
  * fixes capture of monitor stream by name
  * implement some more extensions, this makes paman
    work and removes some warnings.

- Many improvements to the GStreamer elements
  * negotiation rework, avoid calling GStreamer methods from
    the PipeWire callbacks because they might block and cause
    deadlocks.
  * Add support for non-string property values.
  * improve stability after buffer and format
    renegotiation.
  * Rework the device provider.
  * pipewiresink can now provide a stream that can
    be consumed by apps like cheese.

- Many improvements to the JACK layer:
  * Rework the buffer_size callbacks. Make sure we call
    the callback from a 'safe' thread and that we don't
    call the process callback while the application is
    handling the callback. This improves stability in
    apps like Carla when PipeWire dynamically changes
    the buffer size.
  * Improve compatibility with apps that call
    get_buffer_frames() with a 0 size (calfjackrack)
  * JACK can now create nodes that can be set as a
    sink/source in PulseAudio/ALSA apps (you can make an
    effects rack and set that as default sink for
    apps).

- Added a group id property for nodes. This makes it
  possible to schedule nodes with the same driver even
  when they are otherwise not linked together. To make
  this work well a new flag needed to be added to nodes
  to signal when they are ready for processing.

  Together with the GStreamer fixes, this makes things
  like:

   gst-launch-1.0 -v pipewiresrc path=51 stream-properties="props,node.group=1" !
         audio/x-raw ! pipewiresink stream-properties="props,node.group=1"

  work as expected with PipeWire managing the resampling
  to keep the clocks of the devices in sync.

  This can later also be used to force devices to be grouped
  together to create a JACK-like scheduling group.

- Streams and filter now use PIPEWIRE_NODE and
  PIPEWIRE_LATENCY env variables as fallback.

- ACP add per device port list. This makes UCM devices
  expose the right ports.

- Fix some segfaults in ACP and UCM.

- make pw-cat use the metadata to find default devices.

- The media session can now save and load audio device
  Profiles and Routes (volumes), stream volumes and
  the default sink and sources.

PipeWire 0.3.9

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Fix bad audio in chrome

- Remove some errors that are not real errors.

- Fix 100% cpu when disconnecting devices.

- Improve pulseaudio introspection of formats

- Fix JACK metadata handling, carla can now monitor the
  port it creates and insert midi.

- Add a new permission bit (M) that is needed to be able
  to configure metadata on an object. Improve security of
  metadata some more, only allow metadata on objects that
  are visible to the client setting the metadata.

- Add support for videocrop in the GStreamer elements.

- Improve handling of the runtime directory for the
  server sockets. Add some reasonable fallback when
  XDG_RUNTIME_DIR is not set, as suggested in the spec.

- Improve ALSA device names from ACP.

- Fix various crasher bugs. One in the pulse layer, one in
  the session manager.

- Make alsa plugin respect the PIPEWIRE_REMOTE env variable.

- Various compile fixes.


PipeWire 0.3.8

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Fix an embarrassing crasher in the JACK layer when
  metadata keys were removed.

- Make it possible to add properties to jack clients with
  a PIPEWIRE_PROPS env variable. This can be used to make
  JACK nodes look like a device (like an effects rack).

- Improvements in the session manager in how it links
  ports. Now it will try to link matching channels first
  and be more intelligent otherwise. The session manager
  will also configure the stream to the device port
  configuration when needed.

- Add ofono backend for Bluetooth HeadSet support.

- Improve default source and sink handling. They are now
  stored with their id, instead of name, in the metadata.
  This makes it work better with JACK because of JACK's
  limited name length.

- Improve environment variables to make it possible to
  create and connect to servers other than "pipewire-0".
  Implement this in pulseaudio, JACK and alsa layers.

- Add an alsa mixer plugin so that alsamixer works with
  PipeWire. It will configure the default source/sink
  volumes.

- Fix capture devices. There was something wrong with how
  the resampler was used that caused corruption in the
  signal when the resampler was active.

- We now ship alsa card paths, profile-sets configuration
  files and udev rules so that we don't have to rely on
  the pulseaudio ones.

- Many build and stability fixes.


PipeWire 0.3.7

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Improved PulseAudio compatibility. The alsa card profile
  code was reused from PulseAudio. Devices now support
  all profiles, ports, jack detection, UCM and hardware
  mixers that PulseAudio implements. There should not
  be (almost) any difference between PipeWire and PulseAudio
  in how it presents and manages devices.
  Other missing API pieces such as the default sink/source
  and move_stream are implemented now.  At this point
  it should be possible to replace PulseAudio with the
  compatibility layer for those who want to try.

- Many fixes and improvements to the GStreamer elements.
  pipewiresrc now has the ability to periodically resend
  the last frame. This makes it possible for use-cases like
  screensharing to only update the screen on changes while
  still keeping the client side encoder busy. PipeWire
  elements can now also share a connection between them.

- Improvements to the bluetooth nodes. Dynamically adding
  and removing devices should work much smoother now. Many
  fixes and improvements to a2dp and sco nodes.

- Reduced memory usage by using less pre-allocated memory
  where possible. JACK clients are especially using less
  memory.

- Support for passive links is added again. These are links
  that don't cause the associated driver to become active.
  This makes it possible to have blocks of effects+sinks go
  to suspend as a group when not in use.

- Both consumers and producers can now ask to renegotiate
  the format. This required some cleanups and improvements
  to how links and node states were handled. More work is
  needed to implement more use cases.

- Important fixes to how memory is shared with clients. Memory
  was not correctly freed in all cases, which would result
  in reuse of the wrong memory.

- Support for planar formats for audio and video was added.

- Improved error handling in the session manager.

- Metadata is now used to manage default audio source and
  sink devices. The session manager will try to link streams
  to the default device. Changing the default device will
  move streams to the new device. PulseAudio and JACK layers
  respect the default source/sinks.

- Metadata is used to tag the desired output device for
  a stream and the session manager will move streams when
  the metadata changes. The PulseAudio layer uses this to
  implement the move_stream feature.

- Many fixes to the security modules. The session manager now
  has a flatpak module that grants permissions to flatpak
  apps. The PulseAudio layer now respects the permissions of
  objects. Security related properties are made read-only
  now. Different access modules can now coexist.

- The portal module has been split up in 2 parts:
   1) a part living in the daemon that monitors the portal
      dbus owner and tags all clients from this PID. This
      part has to run in the daemon in order to securely
      tag the clients.
   2) a part in the session manager that uses the permission
      store to manage the permissions of portal managed
      clients.


Older versions:


PipeWire 0.3.6

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Extensive memory leak fixing and stress testing was done.
  A big leak in screen sharing with DMA-BUF was fixed.
- Compile fixes
- Stability improvements in jack and pulseaudio layers.
- Added the old portal module to make the Camera portal
  work again. This will be moved to the session manager in
  future versions.
- Improvements to the GStreamer source and sink shutdown.
- Fix compatibility with v2 clients again when negotiating
  buffers.


PipeWire 0.3.5

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Compiler fixes
- Add pw-midiplay and pw-midirecord aliases
- Add pw-mididump tool
- Add pw-metadata tool to inspect, add and remove metadata
  for objects.
- Docs updates, man pages
- install alsa config files
- Fix linked sink/source in pulseaudio
- ratelimit graph processing warnings
- improve buffer handling in GStreamer elements
- Fix power usage by removing the queue for the alsa
  sequencer system announce messages.
- Fix metadata clear() method dispatch.
- Improve parameter enumeration, make it possible to detect
  missing parameters vs no-compatible parameters so that we
  can use defaults in the first case and error in the second
  case.
- Fix cleanup of proxy objects. Stability improvements on
  plug/unplug in session manager.
- Make it possible to set log level from config file
- improve debug of param negotiation errors. Log the
  parameters to stderr/journal.
- Make it possible to configure global logger
  implementation.
- Fix NEON detection
- JACK and PulseAudio compatibility improvements


PipeWire 0.3.4

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- A quick update with some important stability fixes.


PipeWire 0.3.3

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- NEON optimizations for audio conversion (32 and 64 bits)
- rework of session manager implementation
- Add option to disable modules in the session manager
- Release midi hardware devices when suspended
- various build fixes
- Clean up options of various utils
- Stability improvements
- Mayor improvements in pulseaudio emulation. Improved
  timings and compatibility.
- Implementation of drain and flush in pulse and alsa
  emulation.
- Implement poll on file descriptors.
- Improvement of metadata for jack emulation.
- Fix memory and thread problems in jack emulation.
- Simplification of state changes. Should make more use
  cases work in the jack emulation.
- Improvements in the gstreamer elements. Removal of
  extra internal queue. pipewiresink can now be used to
  play audio.
- Add pw-jack and pw-pulse scripts to run pulseaudio and
  jack applications with the right library path.


PipeWire 0.3.2

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- build fixes
- Added support for data type negotiation. This makes it
  possible for a client to say that it can handle DMABuf
  and MemFd and then let the server select a compatible
  format.
- Handle errors when enumerating parameters better.
- Add support for rate, format, channels and period_bytes
  to the alsa config file to restrict what alsa apps can
  negotiate.
- Fix JACK midi output.
- Optimizations in common audio format conversions using
  AVX2. Small optimizations to plugins.
- Change the vulkan compute example to an MIT licensed
  shader.
- Remove some hardcoded defaults in the audio and video
  processing and use the values from the processing
  context. This also fixes the vulkan example.
- Correct the documentation and defaults in the daemon
  config file.
- Fix alsa and v4l2 buffer recycle. A paused client could
  cause the server to leak all buffers.
- Remove some warnings that should be ignored.
- Fix a crash in the bluez5 plugins.
- Try to select higher quality formats first when
  negotiating a format with an audio device.
- Fix an infinite loop in udev detection in some cases.
- Add non-interactive mode to pw-cli. You can now just
  do "pw-cli ls Port" to get a listing of all ports.
  pw-cli will now also connect to the default server by
  default and has options to select a different server.
- Allow the server to go up to the maximum quantum (8192
  samples or ~=180ms) if a client explicitly wants this.


PipeWire 0.3.1

This is a bugfix release that is API and ABI compatible
with previous 0.3.x releases.

- Don't load the rtkit module by default. It can cause a
  sigkill, which is not desirable for mutter, for example.
  Only enable this for the jack library for now.
- Don't use pthread cancel by default because it uses a
  signal that might crash some apps. Only use it for
  the jack library because jack clients really expect this.
- Build fixes for -Werror=suggest-attribute=format
- improve error messages, don't report harmless errors and
  warnings. Try to send error messages to the proxy that
  started the operation or is the owner of the object.
- pw-cat: midi improvement, add midi recording and dump
  in verbose mode
- fix properties when loading spa-nodes from the config
- Fix and update some examples
- jack: check arguments and don't crash when invalid
- Fix buffer memory upload.
- jack: fix compatibility with zrythm. Fix timemaster
  install, improve sample_rate callback. Fix reposition
  handling.
- fix crash in port after buffer negotiation error.
- add support for control ports in pw_filter
- fix cleanup of the metadata module
- improve param enumeration.
- Clear stream buffers when the format is cleared.
- Add create-object command in the config file to create
  object from a factory.
- Fix crash after the driver was not removed from unassigned
  nodes. Also properly pause inactive nodes.
- Use "true" and "false" in properties when we are talking
  about a boolean.
- pulseaudio: improve compatibility


PipeWire 0.3.0

The 0.3 release is a major milestone in the development of
PipeWire. It features a complete redesign of the scheduling
mechanisms that make it possible to run a JACK compatibility
layer with comparable performance to JACK2.

The API has been reworked and is declared stable now. All
development files and runtime paths are versioned so that
future incompatible changes can be done without breaking
existing applications.

PipeWire 0.3 also includes a (now mandatory) session manager
that populates and controls the PipeWire graph. This example
session manager is very simple and not configurable. It is
expected that future version will either switch to a more
flexible session manager (like WirePlumber) or improve the
configuration options of the example session manager.

PipeWire 0.3 includes both PulseAudio, JACK and ALSA
compatibility libraries that are known to support a wide range
of applications. The ALSA library is pretty complete at this
point. The JACK and mostly the PulseAudio compatibility
libraries need more work. See the Wiki pages for the current
compatibility problems. We do not yet encourage people to
switch away from their existing audio solutions (PulseAudio
or JACK) but we would love to hear from people who try it
anyways. Future versions will mostly focus on improving
compatibility further to make PipeWire a drop-in replacement.

PipeWire comes with some GStreamer plugins to consume and
produce data for PipeWire. The consumer (pipewiresrc) is
working well in most cases. The sink (pipewiresink) is known
to be somewhat problematic for now.

PipeWire 0.2.97

Eighth pre-release for upcoming 0.3:

- Build fixes
- pw-cat improvement: Fix remote name, add midi support
- add device subscribe params for completeness
- jack and pulseaudio compatibility fixes
- Fix a bug in resampler, add quality option, tweaked quality
  settings, tested now against https://src.infinitewave.ca/
  testsignals and submitted results for publication.
- Fix awkwardness in buffer negotiations, the default number of
  buffers was 4 and jack could only handle 2, causing
  corruption. Also implement negotiation of Step ranges.
- Fix device reservation to work together with pulseaudio,
  previously we would block pulseaudio.

PipeWire 0.2.96

Seventh pre-release for upcoming 0.3:

- jack: improve compatibility
- Fix unit test
- Fix license of jack and alsa libs
- Make start/stop more threadsafe
- Fix rt-kit again, add params to configure things, increase default
  soft/hard limits to avoid being killed.
- version 0 compatibility improvements, tested with firefox, cheese,
  GStreamer and chrome using compat layers.
- Fix timing for gstreamer source
- Require libspa in pkg-config file
- Limit buffers to 16 to support old clients

PipeWire 0.2.95

Sixth pre-release for upcoming 0.3:

- Fix tests for big endian some more
- Improve v2 compatibility mode: improve type negotiation and
  update_permissions
- Workaround for firefox screen sharing


PipeWire 0.2.94

Fifth pre-release for upcoming 0.3:

- Fix man page names
- Fix jack set_sync_timeout
- Improve JACK compatibility with apps that cache buffer pointers.
- Improve mlock failure warning message, add property to configure
  if mlock should be used.
- Improve OBJECT_PATH in alsa objects
- Install in versioned directory
- Add pw-profiler tool
- Improve pulseaudio compatibility wrt pa_operations
- Thread safety fixes in remote nodes when activating/deactivating
- Improve JACK names on duplicates
- Add option to ignore failure when loading modules

PipeWire 0.2.93

Fourth pre-release for upcoming 0.3:

- Fix unit tests on 32 bits
- Append -pw version to pulse and jack libs. This way we can install
  it next to the real libraries and use a symlink to enable it.
- Improve jack support by killing threads with pthread_cancel. This
  then also remove the eventfd from the data-loop, making it
  maybe a little faster.
- Fix jack_client_close() compatibility
- Fix some segfaults in the session manager
- Improve debug of protocol messages
- Add examples options
- Don't fail when alsa is not found
- Fix some compiler warnings with a new spa_aprintf() helper.
- Add pw-cat, the simple audio playback/record tool
- Rename pipewire tools to pw- prefix
- Add improve pw-cli object dump feature


PipeWire 0.2.92

Third pre-release for upcoming 0.3:

- Improve old version check some more
- Fix unit tests on little/big endian
- Fix compilation when CPU has no optimisations
- Install jack and pulse libraries
- Handle -EACCESS in flatpack access module


PipeWire 0.2.91

It is mostly a bugfix release to make the new version install and
run correctly in distros.

- Install session manager, fix path to find the session manager
- Fix alsa buffer reuse
- Small fixes for crasher bugs
- Implement pw_core_set_paused() to suspend/resume even
  processing. This can be used when using multiple connections
  to a daemon and one needs to pause one connection until the
  other one completes an action. Used by session managers.
- Improve old version check


PipeWire 0.2.90

This is the first pre-release of the 0.3 version. It consists of a
major rewrite and is not API or ABI compatible with the 0.2
branch.


PipeWire 0.2.7

This is mostly a bugfix release and is API/ABI compatible with
previous 0.2 versions.

Work is ongoing in the work branch that features a completely new
scheduling method that will enable audio support. Some of these
API changes are backported in this branch.

- Add support for alsa-lib 1.1.9 which changed the include path
- Improve error checking and reporting in the protocol
- deviceprovider: fix probing without starting
- add sentinel to some functions
- compiler fixes for musl
- Revert object tree permission checks that broke things, this is
  probably not a good idea (and the tree of objects is going to
  be removed later)


PipeWire 0.2.6

- Improve error checking for threads
- Fix some memory and fd leaks
- Fix compilation with C++ compilers and clang
- DISABLE_RTKIT should now not try to use dbus at all
- Camera Portal fixes:
	- add Camera media.role
	- Rename module-flatpak to module-portal
	- Use the portal permissions store for camera checks
- Actually use the passed fd in pipewiresrc
- Make properties with "pipewire." prefix read-only
- Add security label to client object
- Enforce link permissions
- Permissions of objects are now combined with parent permissions
- Remove libv4l2 dependency, it is not used
- Improve format negotiation in autolink #146
- Try to avoid list corruption with event emmission #143
- Fix destroy of client-node memory corruption
- Various small improvements

PipeWire 0.2.5

- build fixes for systemd
- Add cursor and bitmap metadata. This can be used to send a cursor
  sprite with the video stream.
- permissions were set too strict for non-flatpak clients
- Fix crash in loop caused by thread unsafe hook emission
- Add more error checking for thread-loop
- Small cleanups and bugfixes

PipeWire 0.2.4

- Install man pages in right directory
- Add systemd socket activation
- Various memory leak and corruption fixes in properties, dbus and
  buffer mmaped memory.
- Fix v4l2 crash on unplug
- improve stream cleanup

PipeWire 0.2.3

- Fix deviceprovider caps introspection
- Refcounting fixes in pipewiresrc
- Remove clock interpolation from stream
- Improve clock in gstreamer elements
- Remove spalib
- Fix crash with pw_map
- Add version number to hook list
- Improve driver mode in gstreamer elements
- add daemon options
- add man pages

PipeWire 0.2.2

- Increment API version and .so version

PipeWire 0.2.1

- Various fixes to memory handling
- Fixes for shutdown
- v4l2 fix enumeration of frame intervals
- Make the daemon stop when the setup commands fail
- Improve safety of hooks
- Update stream API to more future proof version
- Add more options to stream API such as scheduling in the
  main thread and automatic mapping of buffers
- Add version file and macros to check compile time and
  runtime versions of pipewire
- Future proof some structs


PipeWire 0.1.9

- Various build fixes
- Do more permission checks
- Add support for doing async connections. This can be used to
  make connections through the portal later.
- Fix device creation from the GStreamer device monitor
- v4l2 experiment with controls
- move rtkit to a module to avoid dbus dependency
- use dmabuf allocator in gstreamer elements
- Add DSP module for pro audio cases, remove jack module. The
  idea is to make a replacement jack client library that talks
  pipewire directly instead of trying to emulate a jack server.
- Various memory handling improvements