When api.alsa.split-enable=true for ACP device, instruct UCM to not
use alsa-lib plugins for SplitPCM devices.
Grab the information from UCM for the intended channel remapping, and
add the splitting information to the nodes emitted.
Session manager can then look at that, and load nodes to do the channel
splitting.
Perform detection of supported sample format and rates just after device is
opened, before `snd_pcm_hw_params()` is called for the first time. This fixes a
problem where device restricts available sample rates after HW params are set
preventing sample rate detection (seen with UAC2 devices and kernel 6.1.9)
Bug: https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/issues/1414
Bug: https://github.com/alsa-project/alsa-lib/issues/119
Link: aed52c507f
[Wim: Apply to acp add_pro_profile(), enable pa_alsa_supported_*()]
Backport from Pulseaudio. Reimplement get_data_path. We'll look for the
override files similarly as we do for other config files
(XDG_CONFIG_HOME then /etc then install location), instead of looking at
the Pulseaudio locations ~/.local/share/pulseaudio etc.
Upstream commits:
From: SimonP <simonp.git@gmail.com>
alsa-mixer: Respect XDG base directory spec when loading profile sets
Try $XDG_DATA_HOME, then $XDG_DATA_DIRS, and finally fall back to old behaviour.
From: SimonP <simonp.git@gmail.com>
alsa-mixer: Respect XDG base directory spec when loading path configs
Try $XDG_DATA_HOME, then $XDG_DATA_DIRS, and finally fall back to old
behaviour (prefix-defined directory).
core-util: Ignore non-absolute XDG base dirs
These are invalid per the spec.
Perform detection of supported sample format and rates just after device is
opened, before `snd_pcm_hw_params()` is called for the first time. This fixes a
problem where device restricts available sample rates after HW params are set
preventing sample rate detection (seen with UAC2 devices and kernel 6.1.9)
These headers are designed for including in the project. So the user doesn't
need to install valgrind-devel and we don't have to worry about whether the
headers are available or not.
libacp is a port and wrapper around the pulseaudio card profile code.
It uses a set of templates for construct a card profile and mixer port
settings. It also has support for UCM when available for the hardware.
