pipewire-0.3.41

[Bruce Dubbs]

New point version.

[Bruce Dubbs]

# PipeWire 0.3.41 (2021-12-13)

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

## Highlights

• Improved compatibility for flatpaks. Flatpaks with newer PipeWire version can connect to an older server in all cases.
• A new RAOP module was added to stream to Apple Airplay devices.
• OBS can now capture from the monitor devices again when using WirePlumber.
• Improved JACK compatibility. Improved stability in Carla and Ardour when changing buffer size. Improved latency calculations and playback latency in Ardour.
• Improved pulse-server handling of underruns and buffer size changes.
• Many bugfixes and improvements.

## PipeWire

• The systemd service files now have better names.
• client.access permission checks are improved.
• Fix some memory leaks in error paths.
• Objects now have a global serial number that is unique for the lifetime of the server.
• Make clock.rate, clock.allowed-rates and clock.quantum runtime tunable parameters with the settings metadata.
• Add some additional memory checks in client-node to avoid sending invalid memory to clients.
• Improve buffer memory allocation. If one of the nodes is a remote node, ensure we only use memory that can be shared.
• Version checks when binding to objects is removed. This means that newer clients can now bind to older servers, which is a typical case for a flatpak.
• A bug in the latency calculations was fixed where it would in some cases report the wrong minumum latency.

## modules

• module-echo-cancel has voice-detection enabled now.
• module-raop-sink and module-raop-discover to stream audio to an Apple Airplay device.
• module-filter-chain now has preliminary support for LV2 plugins.

## SPA

• The audio resampler now has improved buffer size calculations. In some cases it was too small and would cause distortions.
• More checks are done when doing volume changes so that the channelmap is correct.
• Audioadapter now exposes most config options with params so that they can be adjusted at runtime.
• The resampler can now calculate the expected input buffer size before receiving the first buffer, which avoids some confusion when starting streams.
• Support was added for some 10bit video formats.
• MONO channel handling was improved.
• Most plugins now set a clock name and this is configurable where it makes sense. The clock.system.monotonic clock name is used for most plugins that use the system clock for timing.

## pulse-server

• implement module-raop-discover
• Use STREAM_CAPTURE_SINK property when capturing from a monitor source to better inform the session manager. This fixes some issues where OBS would capture from the microphone instead of the output monitor.
• Limit the amount of cache messages to 16MB and don't add large memory blocks to the cache. This should fix some excessive memory usage that people reported.
• Fix a potential memory leak when cleaning up a client.
• Do some additional checks to avoid buffer overruns.
• Improve recovery from underruns better. This improves seeking in gnome-music.
• Improve recovery when the quantum is forced larger that the stream configured latency.
• The prebuf state is now handled correctly.

## JACK

• A per type object cache is now implemented. This ensures that port objects remain valid for a longer time because many JACK applications inspect objects after they are destroyed. This improves catia/carla compatibility.
• Recompute the latencies when the buffer-size changes. Fix some cases where we would end up with negative latencies.
• Handle regcomp errors to avoid some crashes later.
• Latency calculations are improved a lot.
• More care is taken to not call a process callback while a buffer size change is pending. This fixes some crashes in Carla, which expect that all clients are paused when one handles the buffersize callback.
• Loopback links to a client are now handled correctly and without latency. This fixes playback latency in ardour6

## ALSA

• ALSA devices now keep track of the samplerate of the card and ensure that all PCM use the same rate. This is a workaround for a kernel bug that is fixed in 5.16.
• Refactor the ALSA plugin a little.
• The ALSA plugin now reports correct delay for a capture PCM.
• The ALSA nodes now expose all config options with params that can be changed at runtime.
• The ALSA node has a configurable clock name. Adaptive resampling to match clock rates is avoided when the driver has the same clock name as the ALSA node. This can be used to link alsa devices together with a word clock.

[Bruce Dubbs]

Fixed at commit 95145941ce07cb2567df161ffbaf1dc2a0be54ae

Package updates.
    Update to Net-DNS-1.33 (Perl module).
    Update to vala-0.54.5.
    Update to nano-6.0.
    Update to pipewire-0.3.41.
    Update to gutenprint-5.3.4.