Changes in v3: * Rewrote the mixer change notes. * Added the low-latency fix note. --- NEWS | 129 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 NEWS diff --git a/NEWS b/NEWS new file mode 100644 index 0000000..c5033ef --- /dev/null +++ b/NEWS @@ -0,0 +1,129 @@ +PulseAudio 4.0, not yet released: + + Utility changes: + + * Shell completion is now available for most of the utility + programs. Bash and zsh are supported. + + * pactl now supports toggling mute. To be clear, setting the mute + to on or off was already supported before, this change adds the + possibility to give "toggle" as a parameter to the set-*-mute + commands. + + * New pactl commands: set-default-sink and set-default-source. + + Module changes: + + * New module: module-role-ducking. The module lowers the volume of + less important streams when a more important stream appears, and + raises the volume back up once the important stream has finished + (this is called "ducking"). The decision whether a stream has + high or low priority is made based on the stream role (the + media.role property). By default, "music" and "video" streams are + ducked, and "phone" streams trigger the ducking. This module is + not loaded in the default configuration. + + * New module: module-remap-source. The module creates a virtual + source on top of another source, with a different channel map. + This allows swapping left and right channels, for example. + + * module-udev-detect: New module argument: use_ucm. PulseAudio uses + ALSA UCM configuration by default if it's available. This module + argument can be used to disable UCM. + + * module-udev-detect: New module argument: tsched_buffer_size. + Buffer size in bytes when timer based scheduling is enabled. + + * module-rtp-send: The "destination" argument was renamed to + "destination_ip". + + * module-rtp-send: New module argument: source_ip. On a multi-homed + system, it may be desirable to use RTP only on a specific + interface. The interface can be selected by specifying the source + IP address. + + Hardware support changes: + + * Both outputs of Native Instruments Traktor Audio 2 can now be + used simultaneously without any manual configuration. + + * Mixer improvements for some laptops with TRRS headset jacks. + + * Capture support fixed for Logitech B530 USB headset and Focusrite + Scarlett 2i2. + + libpulse changes: + + * New function: pa_operation_set_state_callback(). It allows an + application to get a callback from pa_operation when it's + cancelled (perhaps due to disconnection). + + * PA_ENCODING_MPEG2_AAC_IEC61937 added to the pa_encoding_t + enumeration. This means that it's now possible to play MPEG-2 AAC + streams in the passthrough mode to devices that support it. + + * HDMI / DisplayPort monitor name is now available to clients. If + supported by HDMI / DisplayPort hardware and drivers, the name of + the connected monitor, receiver etc. will now show up as a port + property (with key PA_PROP_DEVICE_PRODUCT_NAME). Note that the + name might become available slightly after the port becomes + available (this is due to hardware/driver limitations). A card + change event will be sent out when this information changes. + + * Removed function: pa_format_info_free2(). The + pa_format_info_free2 symbol was never part of the public API, but + was still exported in the ABI in the previous version of + PulseAudio. It is now completely dropped. Since it was never + exposed in any header files, the only programs affected should be + test tools specifically looking for missing symbols. + + Dependency changes: + + * The D-Bus version requirement was bumped to 1.4.12. + + * The alsa-lib version requirement was bumped to 1.0.24. + + * The GTK+ version requirement was bumped to 3.0. + + * The libsystemd-daemon dependency was dropped. + + Performance improvements: + + * Faster C code for mixing 16-bit streams with 1 or 2 channels. + + * ARM NEON implementation for mixing 16-bit streams with 2 + channels. + + * Faster software volume for 16-bit streams on 64-bit platforms. + + * Faster format conversion between 16-bit and 32-bit (integer) + audio. + + * The default resampler was changed from speex-float-3 to + speex-float-1, so the resampling is now much lighter on CPU by + default than before, with the tradeoff that the audio quality + is worse (usually not noticeably so, though). + + Bug fix highlights: + + * Quicker drains: in previous versions of PulseAudio, it could + sometimes take up to a few seconds after a stream finished + playing until pa_stream_drain() actually returned. This has now + been fixed, which also means that programs such as paplay will + end quicker after having finished playback. + + * Issues with device handover to JACK were fixed. JACK should be + now able to reliably acquire the sound card while PulseAudio is + running. + + * When converting between different channel maps, the remixing + can't result in clipping anymore. Streams that earlier could + potentially get clipped are now a bit quieter. + + * In certain low-latency scenarios PulseAudio used a bad algorithm + to decide when to ask clients to send more data (the data request + was sent so late that it was impossible to get the data to the + sound card reliably in time). The algorithm has been improved, + resulting in fewer drop-outs in those scenarios. + + Contributions from: (TODO) -- 1.8.1.2
